1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // prototypes 136 #ifdef ENABLE_CLASSIC 137 static void hci_update_scan_enable(void); 138 static void hci_emit_discoverable_enabled(uint8_t enabled); 139 static int hci_local_ssp_activated(void); 140 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 141 static bool hci_ssp_supported(hci_connection_t * connection); 142 static void hci_notify_if_sco_can_send_now(void); 143 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 144 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 145 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 146 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 147 static void hci_connection_timestamp(hci_connection_t *connection); 148 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 149 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 150 #endif 151 152 static int hci_power_control_on(void); 153 static void hci_power_control_off(void); 154 static void hci_state_reset(void); 155 static void hci_emit_transport_packet_sent(void); 156 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 157 static void hci_emit_nr_connections_changed(void); 158 static void hci_emit_hci_open_failed(void); 159 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 160 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 161 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 162 static void hci_run(void); 163 static int hci_is_le_connection(hci_connection_t * connection); 164 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 165 166 #ifdef ENABLE_CLASSIC 167 static int hci_have_usb_transport(void); 168 #endif 169 170 #ifdef ENABLE_BLE 171 #ifdef ENABLE_LE_CENTRAL 172 // called from test/ble_client/advertising_data_parser.c 173 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 174 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 175 static hci_connection_t * gap_get_outgoing_connection(void); 176 #endif 177 #endif 178 179 // the STACK is here 180 #ifndef HAVE_MALLOC 181 static hci_stack_t hci_stack_static; 182 #endif 183 static hci_stack_t * hci_stack = NULL; 184 185 #ifdef ENABLE_CLASSIC 186 // default name 187 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 188 189 // test helper 190 static uint8_t disable_l2cap_timeouts = 0; 191 #endif 192 193 // reset connection state on create and on reconnect 194 // don't overwrite addr, con handle, role 195 static void hci_connection_init(hci_connection_t * conn){ 196 conn->authentication_flags = AUTH_FLAG_NONE; 197 conn->bonding_flags = 0; 198 conn->requested_security_level = LEVEL_0; 199 #ifdef ENABLE_CLASSIC 200 conn->request_role = HCI_ROLE_INVALID; 201 conn->sniff_subrating_max_latency = 0xffff; 202 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 203 conn->link_key_type = INVALID_LINK_KEY; 204 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 205 btstack_run_loop_set_timer_context(&conn->timeout, conn); 206 hci_connection_timestamp(conn); 207 #endif 208 conn->acl_recombination_length = 0; 209 conn->acl_recombination_pos = 0; 210 conn->num_packets_sent = 0; 211 212 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 213 #ifdef ENABLE_BLE 214 conn->le_phy_update_all_phys = 0xff; 215 #endif 216 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 217 conn->le_max_tx_octets = 27; 218 #endif 219 #ifdef ENABLE_CLASSIC_PAIRING_OOB 220 conn->classic_oob_c_192 = NULL; 221 conn->classic_oob_r_192 = NULL; 222 conn->classic_oob_c_256 = NULL; 223 conn->classic_oob_r_256 = NULL; 224 #endif 225 } 226 227 /** 228 * create connection for given address 229 * 230 * @return connection OR NULL, if no memory left 231 */ 232 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 233 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 234 235 hci_connection_t * conn = btstack_memory_hci_connection_get(); 236 if (!conn) return NULL; 237 hci_connection_init(conn); 238 239 bd_addr_copy(conn->address, addr); 240 conn->address_type = addr_type; 241 conn->con_handle = HCI_CON_HANDLE_INVALID; 242 conn->role = HCI_ROLE_INVALID; 243 244 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 245 246 return conn; 247 } 248 249 250 /** 251 * get le connection parameter range 252 * 253 * @return le connection parameter range struct 254 */ 255 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 256 *range = hci_stack->le_connection_parameter_range; 257 } 258 259 /** 260 * set le connection parameter range 261 * 262 */ 263 264 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 265 hci_stack->le_connection_parameter_range = *range; 266 } 267 268 /** 269 * @brief Test if connection parameters are inside in existing rage 270 * @param conn_interval_min (unit: 1.25ms) 271 * @param conn_interval_max (unit: 1.25ms) 272 * @param conn_latency 273 * @param supervision_timeout (unit: 10ms) 274 * @returns 1 if included 275 */ 276 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 277 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 278 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 279 280 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 281 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 282 283 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 284 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 285 286 return 1; 287 } 288 289 /** 290 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 291 * @note: default: 1 292 * @param max_peripheral_connections 293 */ 294 #ifdef ENABLE_LE_PERIPHERAL 295 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 296 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 297 } 298 #endif 299 300 /** 301 * get hci connections iterator 302 * 303 * @return hci connections iterator 304 */ 305 306 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 307 btstack_linked_list_iterator_init(it, &hci_stack->connections); 308 } 309 310 /** 311 * get connection for a given handle 312 * 313 * @return connection OR NULL, if not found 314 */ 315 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 316 btstack_linked_list_iterator_t it; 317 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 318 while (btstack_linked_list_iterator_has_next(&it)){ 319 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 320 if ( item->con_handle == con_handle ) { 321 return item; 322 } 323 } 324 return NULL; 325 } 326 327 /** 328 * get connection for given address 329 * 330 * @return connection OR NULL, if not found 331 */ 332 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 337 if (connection->address_type != addr_type) continue; 338 if (memcmp(addr, connection->address, 6) != 0) continue; 339 return connection; 340 } 341 return NULL; 342 } 343 344 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 345 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 346 } 347 348 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 350 } 351 352 #ifdef ENABLE_CLASSIC 353 354 #ifdef ENABLE_SCO_OVER_HCI 355 static int hci_number_sco_connections(void){ 356 int connections = 0; 357 btstack_linked_list_iterator_t it; 358 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 359 while (btstack_linked_list_iterator_has_next(&it)){ 360 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 361 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 362 connections++; 363 } 364 return connections; 365 } 366 #endif 367 368 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 369 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 370 #ifdef HAVE_EMBEDDED_TICK 371 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 372 // connections might be timed out 373 hci_emit_l2cap_check_timeout(connection); 374 } 375 #else 376 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 377 // connections might be timed out 378 hci_emit_l2cap_check_timeout(connection); 379 } 380 #endif 381 } 382 383 static void hci_connection_timestamp(hci_connection_t *connection){ 384 #ifdef HAVE_EMBEDDED_TICK 385 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 386 #else 387 connection->timestamp = btstack_run_loop_get_time_ms(); 388 #endif 389 } 390 391 /** 392 * add authentication flags and reset timer 393 * @note: assumes classic connection 394 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 395 */ 396 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 397 bd_addr_t addr; 398 reverse_bd_addr(bd_addr, addr); 399 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 400 if (conn) { 401 connectionSetAuthenticationFlags(conn, flags); 402 hci_connection_timestamp(conn); 403 } 404 } 405 406 static bool hci_pairing_active(hci_connection_t * hci_connection){ 407 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 408 } 409 410 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 411 if (hci_pairing_active(hci_connection)) return; 412 if (ssp){ 413 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 414 } else { 415 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 416 } 417 // if we are initiator, we have sent an HCI Authenticate Request 418 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 419 420 // if we are responder, use minimal service security level as required level 421 if (!initiator){ 422 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 423 } 424 425 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 426 427 uint8_t event[12]; 428 event[0] = GAP_EVENT_PAIRING_STARTED; 429 event[1] = 10; 430 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 431 reverse_bd_addr(hci_connection->address, &event[4]); 432 event[10] = (uint8_t) ssp; 433 event[11] = (uint8_t) initiator; 434 hci_emit_event(event, sizeof(event), 1); 435 } 436 437 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 438 hci_connection->requested_security_level = LEVEL_0; 439 if (!hci_pairing_active(hci_connection)) return; 440 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 441 #ifdef ENABLE_CLASSIC_PAIRING_OOB 442 hci_connection->classic_oob_c_192 = NULL; 443 hci_connection->classic_oob_r_192 = NULL; 444 hci_connection->classic_oob_c_256 = NULL; 445 hci_connection->classic_oob_r_256 = NULL; 446 #endif 447 log_info("pairing complete, status %02x", status); 448 449 uint8_t event[12]; 450 event[0] = GAP_EVENT_PAIRING_COMPLETE; 451 event[1] = 9; 452 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 453 reverse_bd_addr(hci_connection->address, &event[4]); 454 event[10] = status; 455 hci_emit_event(event, sizeof(event), 1); 456 } 457 458 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 459 hci_connection_t * conn = hci_connection_for_handle(handle); 460 if (!conn) return false; 461 return hci_pairing_active(conn); 462 } 463 464 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 465 if (!hci_stack->link_key_db) return; 466 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 467 hci_stack->link_key_db->delete_link_key(addr); 468 } 469 470 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 471 if (!hci_stack->link_key_db) return; 472 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 473 hci_stack->link_key_db->put_link_key(addr, link_key, type); 474 } 475 476 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 477 if (!hci_stack->link_key_db) return false; 478 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 479 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 480 return result; 481 } 482 483 void gap_delete_all_link_keys(void){ 484 bd_addr_t addr; 485 link_key_t link_key; 486 link_key_type_t type; 487 btstack_link_key_iterator_t it; 488 int ok = gap_link_key_iterator_init(&it); 489 if (!ok) { 490 log_error("could not initialize iterator"); 491 return; 492 } 493 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 494 gap_drop_link_key_for_bd_addr(addr); 495 } 496 gap_link_key_iterator_done(&it); 497 } 498 499 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 500 if (!hci_stack->link_key_db) return 0; 501 if (!hci_stack->link_key_db->iterator_init) return 0; 502 return hci_stack->link_key_db->iterator_init(it); 503 } 504 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 505 if (!hci_stack->link_key_db) return 0; 506 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 507 } 508 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 509 if (!hci_stack->link_key_db) return; 510 hci_stack->link_key_db->iterator_done(it); 511 } 512 #endif 513 514 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 515 switch (address_type){ 516 case BD_ADDR_TYPE_LE_PUBLIC: 517 case BD_ADDR_TYPE_LE_RANDOM: 518 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 519 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 520 return true; 521 default: 522 return false; 523 } 524 } 525 526 static int hci_is_le_connection(hci_connection_t * connection){ 527 return hci_is_le_connection_type(connection->address_type); 528 } 529 530 /** 531 * count connections 532 */ 533 static int nr_hci_connections(void){ 534 int count = 0; 535 btstack_linked_item_t *it; 536 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 537 count++; 538 } 539 return count; 540 } 541 542 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 543 544 unsigned int num_packets_sent_classic = 0; 545 unsigned int num_packets_sent_le = 0; 546 547 btstack_linked_item_t *it; 548 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 549 hci_connection_t * connection = (hci_connection_t *) it; 550 if (hci_is_le_connection(connection)){ 551 num_packets_sent_le += connection->num_packets_sent; 552 } 553 if (connection->address_type == BD_ADDR_TYPE_ACL){ 554 num_packets_sent_classic += connection->num_packets_sent; 555 } 556 } 557 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 558 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 559 int free_slots_le = 0; 560 561 if (free_slots_classic < 0){ 562 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 563 return 0; 564 } 565 566 if (hci_stack->le_acl_packets_total_num){ 567 // if we have LE slots, they are used 568 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 569 if (free_slots_le < 0){ 570 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 571 return 0; 572 } 573 } else { 574 // otherwise, classic slots are used for LE, too 575 free_slots_classic -= num_packets_sent_le; 576 if (free_slots_classic < 0){ 577 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 578 return 0; 579 } 580 } 581 582 switch (address_type){ 583 case BD_ADDR_TYPE_UNKNOWN: 584 log_error("hci_number_free_acl_slots: unknown address type"); 585 return 0; 586 587 case BD_ADDR_TYPE_ACL: 588 return free_slots_classic; 589 590 default: 591 if (hci_stack->le_acl_packets_total_num){ 592 return free_slots_le; 593 } 594 return free_slots_classic; 595 } 596 } 597 598 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 599 // get connection type 600 hci_connection_t * connection = hci_connection_for_handle(con_handle); 601 if (!connection){ 602 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 603 return 0; 604 } 605 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 606 } 607 608 #ifdef ENABLE_CLASSIC 609 static int hci_number_free_sco_slots(void){ 610 unsigned int num_sco_packets_sent = 0; 611 btstack_linked_item_t *it; 612 if (hci_stack->synchronous_flow_control_enabled){ 613 // explicit flow control 614 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 615 hci_connection_t * connection = (hci_connection_t *) it; 616 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 617 num_sco_packets_sent += connection->num_packets_sent; 618 } 619 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 620 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 621 return 0; 622 } 623 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 624 } else { 625 // implicit flow control -- TODO 626 int num_ready = 0; 627 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 628 hci_connection_t * connection = (hci_connection_t *) it; 629 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 630 if (connection->sco_tx_ready == 0) continue; 631 num_ready++; 632 } 633 return num_ready; 634 } 635 } 636 #endif 637 638 // only used to send HCI Host Number Completed Packets 639 static int hci_can_send_comand_packet_transport(void){ 640 if (hci_stack->hci_packet_buffer_reserved) return 0; 641 642 // check for async hci transport implementations 643 if (hci_stack->hci_transport->can_send_packet_now){ 644 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 645 return 0; 646 } 647 } 648 return 1; 649 } 650 651 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 652 bool hci_can_send_command_packet_now(void){ 653 if (hci_can_send_comand_packet_transport() == 0) return false; 654 return hci_stack->num_cmd_packets > 0u; 655 } 656 657 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 658 // check for async hci transport implementations 659 if (!hci_stack->hci_transport->can_send_packet_now) return true; 660 return hci_stack->hci_transport->can_send_packet_now(packet_type); 661 } 662 663 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 664 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 665 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 666 } 667 668 bool hci_can_send_acl_le_packet_now(void){ 669 if (hci_stack->hci_packet_buffer_reserved) return false; 670 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 671 } 672 673 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 674 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 675 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 676 } 677 678 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 679 if (hci_stack->hci_packet_buffer_reserved) return false; 680 return hci_can_send_prepared_acl_packet_now(con_handle); 681 } 682 683 #ifdef ENABLE_CLASSIC 684 bool hci_can_send_acl_classic_packet_now(void){ 685 if (hci_stack->hci_packet_buffer_reserved) return false; 686 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 687 } 688 689 bool hci_can_send_prepared_sco_packet_now(void){ 690 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 691 if (hci_have_usb_transport()){ 692 return hci_stack->sco_can_send_now; 693 } else { 694 return hci_number_free_sco_slots() > 0; 695 } 696 } 697 698 bool hci_can_send_sco_packet_now(void){ 699 if (hci_stack->hci_packet_buffer_reserved) return false; 700 return hci_can_send_prepared_sco_packet_now(); 701 } 702 703 void hci_request_sco_can_send_now_event(void){ 704 hci_stack->sco_waiting_for_can_send_now = 1; 705 hci_notify_if_sco_can_send_now(); 706 } 707 #endif 708 709 // used for internal checks in l2cap.c 710 bool hci_is_packet_buffer_reserved(void){ 711 return hci_stack->hci_packet_buffer_reserved; 712 } 713 714 // reserves outgoing packet buffer. @returns 1 if successful 715 bool hci_reserve_packet_buffer(void){ 716 if (hci_stack->hci_packet_buffer_reserved) { 717 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 718 return false; 719 } 720 hci_stack->hci_packet_buffer_reserved = true; 721 return true; 722 } 723 724 void hci_release_packet_buffer(void){ 725 hci_stack->hci_packet_buffer_reserved = false; 726 } 727 728 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 729 static int hci_transport_synchronous(void){ 730 return hci_stack->hci_transport->can_send_packet_now == NULL; 731 } 732 733 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 734 735 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 736 737 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 738 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 739 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 740 max_acl_data_packet_length = hci_stack->le_data_packets_length; 741 } 742 743 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 744 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 745 max_acl_data_packet_length = connection->le_max_tx_octets; 746 } 747 #endif 748 749 log_debug("hci_send_acl_packet_fragments entered"); 750 751 uint8_t status = ERROR_CODE_SUCCESS; 752 // multiple packets could be send on a synchronous HCI transport 753 while (true){ 754 755 log_debug("hci_send_acl_packet_fragments loop entered"); 756 757 // get current data 758 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 759 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 760 bool more_fragments = false; 761 762 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 763 if (current_acl_data_packet_length > max_acl_data_packet_length){ 764 more_fragments = true; 765 current_acl_data_packet_length = max_acl_data_packet_length; 766 } 767 768 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 769 if (acl_header_pos > 0u){ 770 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 771 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 772 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 773 } 774 775 // update header len 776 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 777 778 // count packet 779 connection->num_packets_sent++; 780 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 781 782 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 783 if (more_fragments){ 784 // update start of next fragment to send 785 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 786 } else { 787 // done 788 hci_stack->acl_fragmentation_pos = 0; 789 hci_stack->acl_fragmentation_total_size = 0; 790 } 791 792 // send packet 793 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 794 const int size = current_acl_data_packet_length + 4; 795 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 796 hci_stack->acl_fragmentation_tx_active = 1; 797 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 798 if (err != 0){ 799 // no error from HCI Transport expected 800 status = ERROR_CODE_HARDWARE_FAILURE; 801 } 802 803 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 804 805 // done yet? 806 if (!more_fragments) break; 807 808 // can send more? 809 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 810 } 811 812 log_debug("hci_send_acl_packet_fragments loop over"); 813 814 // release buffer now for synchronous transport 815 if (hci_transport_synchronous()){ 816 hci_stack->acl_fragmentation_tx_active = 0; 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 } 820 821 return status; 822 } 823 824 // pre: caller has reserved the packet buffer 825 uint8_t hci_send_acl_packet_buffer(int size){ 826 btstack_assert(hci_stack->hci_packet_buffer_reserved); 827 828 uint8_t * packet = hci_stack->hci_packet_buffer; 829 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 830 831 // check for free places on Bluetooth module 832 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 833 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 834 hci_release_packet_buffer(); 835 hci_emit_transport_packet_sent(); 836 return BTSTACK_ACL_BUFFERS_FULL; 837 } 838 839 hci_connection_t *connection = hci_connection_for_handle( con_handle); 840 if (!connection) { 841 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 842 hci_release_packet_buffer(); 843 hci_emit_transport_packet_sent(); 844 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 845 } 846 847 #ifdef ENABLE_CLASSIC 848 hci_connection_timestamp(connection); 849 #endif 850 851 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 852 853 // setup data 854 hci_stack->acl_fragmentation_total_size = size; 855 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 856 857 return hci_send_acl_packet_fragments(connection); 858 } 859 860 #ifdef ENABLE_CLASSIC 861 // pre: caller has reserved the packet buffer 862 uint8_t hci_send_sco_packet_buffer(int size){ 863 btstack_assert(hci_stack->hci_packet_buffer_reserved); 864 865 uint8_t * packet = hci_stack->hci_packet_buffer; 866 867 // skip checks in loopback mode 868 if (!hci_stack->loopback_mode){ 869 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 870 871 // check for free places on Bluetooth module 872 if (!hci_can_send_prepared_sco_packet_now()) { 873 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 874 hci_release_packet_buffer(); 875 hci_emit_transport_packet_sent(); 876 return BTSTACK_ACL_BUFFERS_FULL; 877 } 878 879 // track send packet in connection struct 880 hci_connection_t *connection = hci_connection_for_handle( con_handle); 881 if (!connection) { 882 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 883 hci_release_packet_buffer(); 884 hci_emit_transport_packet_sent(); 885 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 886 } 887 888 if (hci_have_usb_transport()){ 889 // token used 890 hci_stack->sco_can_send_now = false; 891 } else { 892 if (hci_stack->synchronous_flow_control_enabled){ 893 connection->num_packets_sent++; 894 } else { 895 connection->sco_tx_ready--; 896 } 897 } 898 } 899 900 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 901 902 #ifdef HAVE_SCO_TRANSPORT 903 hci_stack->sco_transport->send_packet(packet, size); 904 hci_release_packet_buffer(); 905 hci_emit_transport_packet_sent(); 906 907 return 0; 908 #else 909 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 910 if (hci_transport_synchronous()){ 911 hci_release_packet_buffer(); 912 hci_emit_transport_packet_sent(); 913 } 914 915 if (err != 0){ 916 return ERROR_CODE_HARDWARE_FAILURE; 917 } 918 return ERROR_CODE_SUCCESS; 919 #endif 920 } 921 #endif 922 923 static void acl_handler(uint8_t *packet, uint16_t size){ 924 925 // get info 926 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 927 hci_connection_t *conn = hci_connection_for_handle(con_handle); 928 uint8_t acl_flags = READ_ACL_FLAGS(packet); 929 uint16_t acl_length = READ_ACL_LENGTH(packet); 930 931 // ignore non-registered handle 932 if (!conn){ 933 log_error("acl_handler called with non-registered handle %u!" , con_handle); 934 return; 935 } 936 937 // assert packet is complete 938 if ((acl_length + 4u) != size){ 939 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 940 return; 941 } 942 943 #ifdef ENABLE_CLASSIC 944 // update idle timestamp 945 hci_connection_timestamp(conn); 946 #endif 947 948 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 949 hci_stack->host_completed_packets = 1; 950 conn->num_packets_completed++; 951 #endif 952 953 // handle different packet types 954 switch (acl_flags & 0x03u) { 955 956 case 0x01: // continuation fragment 957 958 // sanity checks 959 if (conn->acl_recombination_pos == 0u) { 960 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 961 return; 962 } 963 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 964 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 965 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 966 conn->acl_recombination_pos = 0; 967 return; 968 } 969 970 // append fragment payload (header already stored) 971 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 972 &packet[4], acl_length); 973 conn->acl_recombination_pos += acl_length; 974 975 // forward complete L2CAP packet if complete. 976 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 977 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 978 // reset recombination buffer 979 conn->acl_recombination_length = 0; 980 conn->acl_recombination_pos = 0; 981 } 982 break; 983 984 case 0x02: { // first fragment 985 986 // sanity check 987 if (conn->acl_recombination_pos) { 988 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 989 conn->acl_recombination_pos = 0; 990 } 991 992 // peek into L2CAP packet! 993 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 994 995 // compare fragment size to L2CAP packet size 996 if (acl_length >= (l2cap_length + 4u)){ 997 // forward fragment as L2CAP packet 998 hci_emit_acl_packet(packet, acl_length + 4u); 999 } else { 1000 1001 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1002 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1003 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1004 return; 1005 } 1006 1007 // store first fragment and tweak acl length for complete package 1008 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1009 packet, acl_length + 4u); 1010 conn->acl_recombination_pos = acl_length + 4u; 1011 conn->acl_recombination_length = l2cap_length; 1012 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1013 } 1014 break; 1015 1016 } 1017 default: 1018 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1019 return; 1020 } 1021 1022 // execute main loop 1023 hci_run(); 1024 } 1025 1026 static void hci_connection_stop_timer(hci_connection_t * conn){ 1027 btstack_run_loop_remove_timer(&conn->timeout); 1028 #ifdef ENABLE_CLASSIC 1029 btstack_run_loop_remove_timer(&conn->timeout_sco); 1030 #endif 1031 } 1032 1033 static void hci_shutdown_connection(hci_connection_t *conn){ 1034 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1035 1036 #ifdef ENABLE_CLASSIC 1037 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1038 bd_addr_type_t addr_type = conn->address_type; 1039 #endif 1040 #ifdef HAVE_SCO_TRANSPORT 1041 hci_con_handle_t con_handle = conn->con_handle; 1042 #endif 1043 #endif 1044 1045 hci_connection_stop_timer(conn); 1046 1047 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1048 btstack_memory_hci_connection_free( conn ); 1049 1050 // now it's gone 1051 hci_emit_nr_connections_changed(); 1052 1053 #ifdef ENABLE_CLASSIC 1054 #ifdef ENABLE_SCO_OVER_HCI 1055 // update SCO 1056 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1057 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1058 } 1059 #endif 1060 #ifdef HAVE_SCO_TRANSPORT 1061 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1062 hci_stack->sco_transport->close(con_handle); 1063 } 1064 #endif 1065 #endif 1066 } 1067 1068 #ifdef ENABLE_CLASSIC 1069 1070 static const uint16_t packet_type_sizes[] = { 1071 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1072 HCI_ACL_DH1_SIZE, 0, 0, 0, 1073 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1074 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1075 }; 1076 static const uint8_t packet_type_feature_requirement_bit[] = { 1077 0, // 3 slot packets 1078 1, // 5 slot packets 1079 25, // EDR 2 mpbs 1080 26, // EDR 3 mbps 1081 39, // 3 slot EDR packts 1082 40, // 5 slot EDR packet 1083 }; 1084 static const uint16_t packet_type_feature_packet_mask[] = { 1085 0x0f00, // 3 slot packets 1086 0xf000, // 5 slot packets 1087 0x1102, // EDR 2 mpbs 1088 0x2204, // EDR 3 mbps 1089 0x0300, // 3 slot EDR packts 1090 0x3000, // 5 slot EDR packet 1091 }; 1092 1093 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1094 // enable packet types based on size 1095 uint16_t packet_types = 0; 1096 unsigned int i; 1097 for (i=0;i<16;i++){ 1098 if (packet_type_sizes[i] == 0) continue; 1099 if (packet_type_sizes[i] <= buffer_size){ 1100 packet_types |= 1 << i; 1101 } 1102 } 1103 // disable packet types due to missing local supported features 1104 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1105 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1106 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1107 if (feature_set) continue; 1108 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1109 packet_types &= ~packet_type_feature_packet_mask[i]; 1110 } 1111 // flip bits for "may not be used" 1112 packet_types ^= 0x3306; 1113 return packet_types; 1114 } 1115 1116 uint16_t hci_usable_acl_packet_types(void){ 1117 return hci_stack->packet_types; 1118 } 1119 #endif 1120 1121 uint8_t* hci_get_outgoing_packet_buffer(void){ 1122 // hci packet buffer is >= acl data packet length 1123 return hci_stack->hci_packet_buffer; 1124 } 1125 1126 uint16_t hci_max_acl_data_packet_length(void){ 1127 return hci_stack->acl_data_packet_length; 1128 } 1129 1130 #ifdef ENABLE_CLASSIC 1131 bool hci_extended_sco_link_supported(void){ 1132 // No. 31, byte 3, bit 7 1133 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1134 } 1135 #endif 1136 1137 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1138 // No. 54, byte 6, bit 6 1139 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1140 } 1141 1142 static int gap_ssp_supported(void){ 1143 // No. 51, byte 6, bit 3 1144 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1145 } 1146 1147 static int hci_classic_supported(void){ 1148 #ifdef ENABLE_CLASSIC 1149 // No. 37, byte 4, bit 5, = No BR/EDR Support 1150 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1151 #else 1152 return 0; 1153 #endif 1154 } 1155 1156 static int hci_le_supported(void){ 1157 #ifdef ENABLE_BLE 1158 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1159 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1160 #else 1161 return 0; 1162 #endif 1163 } 1164 1165 #ifdef ENABLE_BLE 1166 1167 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1168 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1169 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1170 } else { 1171 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1172 } 1173 } 1174 1175 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1176 *addr_type = hci_stack->le_own_addr_type; 1177 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1178 } 1179 1180 #ifdef ENABLE_LE_PERIPHERAL 1181 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1182 *addr_type = hci_stack->le_advertisements_own_addr_type; 1183 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1184 }; 1185 #endif 1186 1187 #ifdef ENABLE_LE_CENTRAL 1188 1189 /** 1190 * @brief Get own addr type and address used for LE connections (Central) 1191 */ 1192 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1193 *addr_type = hci_stack->le_connection_own_addr_type; 1194 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1195 } 1196 1197 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1198 1199 int offset = 3; 1200 int num_reports = packet[offset]; 1201 offset += 1; 1202 1203 int i; 1204 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1205 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1206 for (i=0; (i<num_reports) && (offset < size);i++){ 1207 // sanity checks on data_length: 1208 uint8_t data_length = packet[offset + 8]; 1209 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1210 if ((offset + 9u + data_length + 1u) > size) return; 1211 // setup event 1212 uint8_t event_size = 10u + data_length; 1213 int pos = 0; 1214 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1215 event[pos++] = event_size; 1216 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1217 offset += 8; 1218 pos += 8; 1219 event[pos++] = packet[offset + 1 + data_length]; // rssi 1220 event[pos++] = data_length; 1221 offset++; 1222 (void)memcpy(&event[pos], &packet[offset], data_length); 1223 pos += data_length; 1224 offset += data_length + 1u; // rssi 1225 hci_emit_event(event, pos, 1); 1226 } 1227 } 1228 #endif 1229 #endif 1230 1231 #ifdef ENABLE_BLE 1232 #ifdef ENABLE_LE_PERIPHERAL 1233 static void hci_update_advertisements_enabled_for_current_roles(void){ 1234 if (hci_stack->le_advertisements_enabled){ 1235 // get number of active le slave connections 1236 int num_slave_connections = 0; 1237 btstack_linked_list_iterator_t it; 1238 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1239 while (btstack_linked_list_iterator_has_next(&it)){ 1240 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1241 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1242 if (con->state != OPEN) continue; 1243 if (con->role != HCI_ROLE_SLAVE) continue; 1244 if (!hci_is_le_connection(con)) continue; 1245 num_slave_connections++; 1246 } 1247 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1248 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1249 } else { 1250 hci_stack->le_advertisements_enabled_for_current_roles = false; 1251 } 1252 } 1253 #endif 1254 #endif 1255 1256 #ifdef ENABLE_CLASSIC 1257 static void gap_run_set_local_name(void){ 1258 hci_reserve_packet_buffer(); 1259 uint8_t * packet = hci_stack->hci_packet_buffer; 1260 // construct HCI Command and send 1261 uint16_t opcode = hci_write_local_name.opcode; 1262 hci_stack->last_cmd_opcode = opcode; 1263 packet[0] = opcode & 0xff; 1264 packet[1] = opcode >> 8; 1265 packet[2] = DEVICE_NAME_LEN; 1266 memset(&packet[3], 0, DEVICE_NAME_LEN); 1267 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1268 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1269 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1270 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1271 // expand '00:00:00:00:00:00' in name with bd_addr 1272 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1273 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1274 } 1275 1276 static void gap_run_set_eir_data(void){ 1277 hci_reserve_packet_buffer(); 1278 uint8_t * packet = hci_stack->hci_packet_buffer; 1279 // construct HCI Command in-place and send 1280 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1281 hci_stack->last_cmd_opcode = opcode; 1282 uint16_t offset = 0; 1283 packet[offset++] = opcode & 0xff; 1284 packet[offset++] = opcode >> 8; 1285 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1286 packet[offset++] = 0; // FEC not required 1287 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1288 if (hci_stack->eir_data){ 1289 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1290 ad_context_t context; 1291 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1292 uint8_t data_type = ad_iterator_get_data_type(&context); 1293 uint8_t size = ad_iterator_get_data_len(&context); 1294 const uint8_t *data = ad_iterator_get_data(&context); 1295 // copy item 1296 packet[offset++] = size + 1; 1297 packet[offset++] = data_type; 1298 memcpy(&packet[offset], data, size); 1299 // update name item 1300 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1301 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1302 } 1303 offset += size; 1304 } 1305 } else { 1306 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1307 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1308 packet[offset++] = bytes_to_copy + 1; 1309 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1310 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1311 // expand '00:00:00:00:00:00' in name with bd_addr 1312 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1313 } 1314 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1315 } 1316 1317 static void hci_run_gap_tasks_classic(void){ 1318 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1319 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1320 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1321 return; 1322 } 1323 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1324 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1325 gap_run_set_local_name(); 1326 return; 1327 } 1328 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1329 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1330 gap_run_set_eir_data(); 1331 return; 1332 } 1333 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1334 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1335 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1336 return; 1337 } 1338 // write page scan activity 1339 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1340 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1341 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1342 return; 1343 } 1344 // write page scan type 1345 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1346 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1347 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1348 return; 1349 } 1350 // send scan enable 1351 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1352 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1353 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1354 return; 1355 } 1356 } 1357 #endif 1358 1359 #ifndef HAVE_HOST_CONTROLLER_API 1360 1361 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1362 if (!hci_stack->config) return 0; 1363 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1364 // Limit baud rate for Broadcom chipsets to 3 mbps 1365 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1366 baud_rate = 3000000; 1367 } 1368 return baud_rate; 1369 } 1370 1371 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1372 UNUSED(ds); 1373 1374 switch (hci_stack->substate){ 1375 case HCI_INIT_W4_SEND_RESET: 1376 log_info("Resend HCI Reset"); 1377 hci_stack->substate = HCI_INIT_SEND_RESET; 1378 hci_stack->num_cmd_packets = 1; 1379 hci_run(); 1380 break; 1381 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1382 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1383 if (hci_stack->hci_transport->reset_link){ 1384 hci_stack->hci_transport->reset_link(); 1385 } 1386 1387 /* fall through */ 1388 1389 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1390 log_info("Resend HCI Reset - CSR Warm Boot"); 1391 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1392 hci_stack->num_cmd_packets = 1; 1393 hci_run(); 1394 break; 1395 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1396 if (hci_stack->hci_transport->set_baudrate){ 1397 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1398 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1399 hci_stack->hci_transport->set_baudrate(baud_rate); 1400 } 1401 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1402 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1403 if (hci_stack->hci_transport->reset_link){ 1404 log_info("Link Reset"); 1405 hci_stack->hci_transport->reset_link(); 1406 } 1407 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1408 hci_run(); 1409 } 1410 break; 1411 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1412 // otherwise continue 1413 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1414 hci_send_cmd(&hci_read_local_supported_commands); 1415 break; 1416 default: 1417 break; 1418 } 1419 } 1420 #endif 1421 1422 static void hci_initializing_next_state(void){ 1423 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1424 } 1425 1426 // assumption: hci_can_send_command_packet_now() == true 1427 static void hci_initializing_run(void){ 1428 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1429 1430 bool need_baud_change = false; 1431 1432 #ifndef HAVE_HOST_CONTROLLER_API 1433 need_baud_change = hci_stack->config 1434 && hci_stack->chipset 1435 && hci_stack->chipset->set_baudrate_command 1436 && hci_stack->hci_transport->set_baudrate 1437 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1438 #endif 1439 1440 switch (hci_stack->substate){ 1441 case HCI_INIT_SEND_RESET: 1442 hci_state_reset(); 1443 1444 #ifndef HAVE_HOST_CONTROLLER_API 1445 // prepare reset if command complete not received in 100ms 1446 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1447 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1448 btstack_run_loop_add_timer(&hci_stack->timeout); 1449 #endif 1450 // send command 1451 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1452 hci_send_cmd(&hci_reset); 1453 break; 1454 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1455 hci_send_cmd(&hci_read_local_version_information); 1456 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1457 break; 1458 case HCI_INIT_SEND_READ_LOCAL_NAME: 1459 hci_send_cmd(&hci_read_local_name); 1460 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1461 break; 1462 1463 #ifndef HAVE_HOST_CONTROLLER_API 1464 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1465 hci_state_reset(); 1466 // prepare reset if command complete not received in 100ms 1467 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1468 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1469 btstack_run_loop_add_timer(&hci_stack->timeout); 1470 // send command 1471 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1472 hci_send_cmd(&hci_reset); 1473 break; 1474 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1475 hci_state_reset(); 1476 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1477 hci_send_cmd(&hci_reset); 1478 break; 1479 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1480 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1481 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1482 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1483 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1484 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1485 break; 1486 } 1487 case HCI_INIT_SET_BD_ADDR: 1488 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1489 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1490 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1491 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1492 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1493 break; 1494 case HCI_INIT_SEND_BAUD_CHANGE: 1495 if (need_baud_change) { 1496 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1497 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1498 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1499 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1500 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1501 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1502 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1503 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1504 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1505 btstack_run_loop_add_timer(&hci_stack->timeout); 1506 } 1507 break; 1508 } 1509 1510 /* fall through */ 1511 1512 case HCI_INIT_CUSTOM_INIT: 1513 // Custom initialization 1514 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1515 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1516 bool send_cmd = false; 1517 switch (hci_stack->chipset_result){ 1518 case BTSTACK_CHIPSET_VALID_COMMAND: 1519 send_cmd = true; 1520 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1521 break; 1522 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1523 send_cmd = true; 1524 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1525 log_info("CSR Warm Boot"); 1526 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1527 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1528 btstack_run_loop_add_timer(&hci_stack->timeout); 1529 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1530 && hci_stack->config 1531 && hci_stack->chipset 1532 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1533 && hci_stack->hci_transport->set_baudrate 1534 && hci_transport_uart_get_main_baud_rate()){ 1535 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1536 } else { 1537 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1538 } 1539 break; 1540 default: 1541 break; 1542 } 1543 1544 if (send_cmd){ 1545 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1546 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1547 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1548 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1549 break; 1550 } 1551 log_info("Init script done"); 1552 1553 // Init script download on Broadcom chipsets causes: 1554 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1555 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1556 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1557 1558 // - baud rate to reset, restore UART baud rate if needed 1559 if (need_baud_change) { 1560 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1561 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1562 hci_stack->hci_transport->set_baudrate(baud_rate); 1563 } 1564 1565 uint16_t bcm_delay_ms = 300; 1566 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1567 // -> Work around: wait here. 1568 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1569 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1570 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1571 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1572 btstack_run_loop_add_timer(&hci_stack->timeout); 1573 break; 1574 } 1575 } 1576 /* fall through */ 1577 #endif 1578 1579 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1580 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1581 hci_send_cmd(&hci_read_local_supported_commands); 1582 break; 1583 case HCI_INIT_READ_BD_ADDR: 1584 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1585 hci_send_cmd(&hci_read_bd_addr); 1586 break; 1587 case HCI_INIT_READ_BUFFER_SIZE: 1588 // only read buffer size if supported 1589 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1590 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1591 hci_send_cmd(&hci_read_buffer_size); 1592 break; 1593 } 1594 /* fall through */ 1595 1596 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1597 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1598 hci_send_cmd(&hci_read_local_supported_features); 1599 break; 1600 1601 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1602 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1603 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1604 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1605 break; 1606 case HCI_INIT_HOST_BUFFER_SIZE: 1607 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1608 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1609 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1610 break; 1611 #endif 1612 1613 case HCI_INIT_SET_EVENT_MASK: 1614 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1615 if (hci_le_supported()){ 1616 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1617 } else { 1618 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1619 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1620 } 1621 break; 1622 1623 #ifdef ENABLE_CLASSIC 1624 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1625 if (gap_ssp_supported()){ 1626 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1627 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1628 break; 1629 } 1630 /* fall through */ 1631 1632 case HCI_INIT_WRITE_INQUIRY_MODE: 1633 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1634 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1635 break; 1636 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1637 // skip write secure connections host support if not supported or disabled 1638 if (hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1639 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1640 hci_stack->secure_connections_active = true; 1641 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1642 break; 1643 } 1644 /* fall through */ 1645 1646 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1647 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1648 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1649 break; 1650 // only sent if ENABLE_SCO_OVER_HCI is defined 1651 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1652 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1653 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1654 break; 1655 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1656 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1657 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1658 break; 1659 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1660 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1661 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1662 #ifdef ENABLE_SCO_OVER_HCI 1663 log_info("BCM: Route SCO data via HCI transport"); 1664 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1665 #endif 1666 #ifdef ENABLE_SCO_OVER_PCM 1667 log_info("BCM: Route SCO data via PCM interface"); 1668 #ifdef ENABLE_BCM_PCM_WBS 1669 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1670 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1671 #else 1672 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1673 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1674 #endif 1675 #endif 1676 break; 1677 #ifdef ENABLE_SCO_OVER_PCM 1678 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1679 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1680 log_info("BCM: Config PCM interface for I2S"); 1681 #ifdef ENABLE_BCM_PCM_WBS 1682 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1683 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1684 #else 1685 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1686 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1687 #endif 1688 break; 1689 #endif 1690 #endif 1691 1692 #ifdef ENABLE_BLE 1693 // LE INIT 1694 case HCI_INIT_LE_READ_BUFFER_SIZE: 1695 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1696 hci_send_cmd(&hci_le_read_buffer_size); 1697 break; 1698 case HCI_INIT_LE_SET_EVENT_MASK: 1699 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1700 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1701 break; 1702 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1703 // LE Supported Host = 1, Simultaneous Host = 0 1704 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1705 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1706 break; 1707 #endif 1708 1709 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1710 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1711 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1712 hci_send_cmd(&hci_le_read_maximum_data_length); 1713 break; 1714 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1715 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1716 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1717 break; 1718 #endif 1719 1720 #ifdef ENABLE_LE_CENTRAL 1721 case HCI_INIT_READ_WHITE_LIST_SIZE: 1722 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1723 hci_send_cmd(&hci_le_read_white_list_size); 1724 break; 1725 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1726 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1727 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); 1728 break; 1729 #endif 1730 default: 1731 return; 1732 } 1733 } 1734 1735 static void hci_init_done(void){ 1736 #ifdef ENABLE_CLASSIC 1737 // init sequence complete, check if GAP Tasks are completed 1738 if (hci_stack->gap_tasks != 0) { 1739 hci_run_gap_tasks_classic(); 1740 return; 1741 } 1742 #endif 1743 1744 // done. tell the app 1745 log_info("hci_init_done -> HCI_STATE_WORKING"); 1746 hci_stack->state = HCI_STATE_WORKING; 1747 hci_emit_state(); 1748 hci_run(); 1749 } 1750 1751 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1752 bool command_completed = false; 1753 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1754 uint16_t opcode = little_endian_read_16(packet,3); 1755 if (opcode == hci_stack->last_cmd_opcode){ 1756 command_completed = true; 1757 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1758 } else { 1759 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1760 } 1761 } 1762 1763 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1764 uint8_t status = packet[2]; 1765 uint16_t opcode = little_endian_read_16(packet,4); 1766 if (opcode == hci_stack->last_cmd_opcode){ 1767 if (status){ 1768 command_completed = true; 1769 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1770 } else { 1771 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1772 } 1773 } else { 1774 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1775 } 1776 } 1777 #ifndef HAVE_HOST_CONTROLLER_API 1778 // Vendor == CSR 1779 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1780 // TODO: track actual command 1781 command_completed = true; 1782 } 1783 1784 // Vendor == Toshiba 1785 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1786 // TODO: track actual command 1787 command_completed = true; 1788 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1789 hci_stack->num_cmd_packets = 1; 1790 } 1791 #endif 1792 1793 return command_completed; 1794 } 1795 1796 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1797 1798 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1799 1800 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1801 1802 #ifndef HAVE_HOST_CONTROLLER_API 1803 1804 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1805 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1806 // 1807 // HCI Reset 1808 // Timeout 100 ms 1809 // HCI Reset 1810 // Command Complete Reset 1811 // HCI Read Local Version Information 1812 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1813 // hang... 1814 // 1815 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1816 if (!command_completed 1817 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1818 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1819 1820 uint16_t opcode = little_endian_read_16(packet,3); 1821 if (opcode == hci_reset.opcode){ 1822 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1823 return; 1824 } 1825 } 1826 1827 // CSR & H5 1828 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1829 if (!command_completed 1830 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1831 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1832 1833 uint16_t opcode = little_endian_read_16(packet,3); 1834 if (opcode == hci_reset.opcode){ 1835 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1836 return; 1837 } 1838 } 1839 1840 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1841 // fix: Correct substate and behave as command below 1842 if (command_completed){ 1843 switch (hci_stack->substate){ 1844 case HCI_INIT_SEND_RESET: 1845 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1846 break; 1847 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1848 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1849 break; 1850 default: 1851 break; 1852 } 1853 } 1854 1855 #endif 1856 1857 if (!command_completed) return; 1858 1859 bool need_baud_change = false; 1860 bool need_addr_change = false; 1861 1862 #ifndef HAVE_HOST_CONTROLLER_API 1863 need_baud_change = hci_stack->config 1864 && hci_stack->chipset 1865 && hci_stack->chipset->set_baudrate_command 1866 && hci_stack->hci_transport->set_baudrate 1867 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1868 1869 need_addr_change = hci_stack->custom_bd_addr_set 1870 && hci_stack->chipset 1871 && hci_stack->chipset->set_bd_addr_command; 1872 #endif 1873 1874 switch(hci_stack->substate){ 1875 1876 #ifndef HAVE_HOST_CONTROLLER_API 1877 case HCI_INIT_SEND_RESET: 1878 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1879 // fix: just correct substate and behave as command below 1880 1881 /* fall through */ 1882 #endif 1883 1884 case HCI_INIT_W4_SEND_RESET: 1885 btstack_run_loop_remove_timer(&hci_stack->timeout); 1886 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1887 return; 1888 1889 #ifndef HAVE_HOST_CONTROLLER_API 1890 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1891 // for STLC2500D, baud rate change already happened. 1892 // for others, baud rate gets changed now 1893 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1894 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1895 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1896 hci_stack->hci_transport->set_baudrate(baud_rate); 1897 } 1898 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1899 return; 1900 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1901 btstack_run_loop_remove_timer(&hci_stack->timeout); 1902 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1903 return; 1904 case HCI_INIT_W4_CUSTOM_INIT: 1905 // repeat custom init 1906 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1907 return; 1908 #endif 1909 1910 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1911 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1912 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1913 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1914 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1915 return; 1916 } 1917 if (need_addr_change){ 1918 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1919 return; 1920 } 1921 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1922 return; 1923 #ifndef HAVE_HOST_CONTROLLER_API 1924 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1925 if (need_baud_change){ 1926 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1927 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1928 hci_stack->hci_transport->set_baudrate(baud_rate); 1929 } 1930 if (need_addr_change){ 1931 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1932 return; 1933 } 1934 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1935 return; 1936 case HCI_INIT_W4_SET_BD_ADDR: 1937 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1938 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1939 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1940 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1941 return; 1942 } 1943 // skipping st warm boot 1944 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1945 return; 1946 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1947 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1948 return; 1949 #endif 1950 case HCI_INIT_W4_SET_EVENT_MASK: 1951 // skip Classic init commands for LE only chipsets 1952 if (!hci_classic_supported()){ 1953 #ifdef ENABLE_BLE 1954 if (hci_le_supported()){ 1955 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1956 return; 1957 } 1958 #endif 1959 log_error("Neither BR/EDR nor LE supported"); 1960 hci_init_done(); 1961 return; 1962 } 1963 hci_stack->substate = HCI_INIT_WRITE_SIMPLE_PAIRING_MODE; 1964 return; 1965 1966 #ifdef ENABLE_BLE 1967 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1968 // skip write le host if not supported (e.g. on LE only EM9301) 1969 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1970 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1971 return; 1972 1973 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1974 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1975 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1976 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1977 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1978 return; 1979 } 1980 // explicit fall through to reduce repetitions 1981 1982 #ifdef ENABLE_LE_CENTRAL 1983 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1984 #else 1985 hci_init_done(); 1986 #endif 1987 return; 1988 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1989 1990 #endif /* ENABLE_BLE */ 1991 1992 #ifdef ENABLE_SCO_OVER_HCI 1993 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 1994 // skip write synchronous flow control if not supported 1995 if (hci_stack->local_supported_commands[0] & 0x04) break; 1996 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1997 1998 /* fall through */ 1999 2000 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2001 // skip write default erroneous data reporting if not supported 2002 if (hci_stack->local_supported_commands[0] & 0x08) break; 2003 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 2004 2005 /* fall through */ 2006 2007 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 2008 // skip bcm set sco pcm config on non-Broadcom chipsets 2009 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 2010 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2011 2012 /* fall through */ 2013 2014 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 2015 if (!hci_le_supported()){ 2016 // SKIP LE init for Classic only configuration 2017 hci_init_done(); 2018 return; 2019 } 2020 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2021 break; 2022 2023 #else /* !ENABLE_SCO_OVER_HCI */ 2024 2025 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 2026 #ifdef ENABLE_SCO_OVER_PCM 2027 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 2028 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 2029 return; 2030 } 2031 #endif 2032 /* fall through */ 2033 2034 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2035 #ifdef ENABLE_BLE 2036 if (hci_le_supported()){ 2037 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 2038 return; 2039 } 2040 #endif 2041 // SKIP LE init for Classic only configuration 2042 hci_init_done(); 2043 return; 2044 #endif /* ENABLE_SCO_OVER_HCI */ 2045 2046 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 2047 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 2048 // Response to command before init done state -> init done 2049 case (HCI_INIT_DONE-1): 2050 hci_init_done(); 2051 return; 2052 #endif 2053 2054 default: 2055 break; 2056 } 2057 hci_initializing_next_state(); 2058 } 2059 2060 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2061 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2062 bd_addr_t bd_address; 2063 (void)memcpy(&bd_address, conn->address, 6); 2064 2065 #ifdef ENABLE_CLASSIC 2066 // cache needed data 2067 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2068 #endif 2069 2070 // connection failed, remove entry 2071 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2072 btstack_memory_hci_connection_free( conn ); 2073 2074 #ifdef ENABLE_CLASSIC 2075 // notify client if dedicated bonding 2076 if (notify_dedicated_bonding_failed){ 2077 log_info("hci notify_dedicated_bonding_failed"); 2078 hci_emit_dedicated_bonding_result(bd_address, status); 2079 } 2080 2081 // if authentication error, also delete link key 2082 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2083 gap_drop_link_key_for_bd_addr(bd_address); 2084 } 2085 #else 2086 UNUSED(status); 2087 #endif 2088 } 2089 2090 #ifdef ENABLE_CLASSIC 2091 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2092 // SSP Controller 2093 if (features[6] & (1 << 3)){ 2094 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2095 } 2096 // eSCO 2097 if (features[3] & (1<<7)){ 2098 conn->remote_supported_features[0] |= 1; 2099 } 2100 // Extended features 2101 if (features[7] & (1<<7)){ 2102 conn->remote_supported_features[0] |= 2; 2103 } 2104 } 2105 2106 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2107 // SSP Host 2108 if (features[0] & (1 << 0)){ 2109 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2110 } 2111 // SC Host 2112 if (features[0] & (1 << 3)){ 2113 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2114 } 2115 } 2116 2117 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2118 // SC Controller 2119 if (features[1] & (1 << 0)){ 2120 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2121 } 2122 } 2123 2124 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2125 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2126 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2127 if (conn->bonding_flags & BONDING_DEDICATED){ 2128 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2129 } 2130 } 2131 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2132 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2133 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2134 } 2135 2136 #endif 2137 2138 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2139 // handle BT initialization 2140 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2141 hci_initializing_event_handler(packet, size); 2142 } 2143 2144 // help with BT sleep 2145 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2146 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2147 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2148 hci_initializing_next_state(); 2149 } 2150 } 2151 2152 #ifdef ENABLE_CLASSIC 2153 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2154 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2155 conn->encryption_key_size = encryption_key_size; 2156 2157 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2158 conn->requested_security_level = LEVEL_0; 2159 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2160 return; 2161 } 2162 2163 // Request Authentication if not already done 2164 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2165 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2166 } 2167 #endif 2168 2169 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2170 UNUSED(size); 2171 2172 uint16_t manufacturer; 2173 #ifdef ENABLE_CLASSIC 2174 hci_con_handle_t handle; 2175 hci_connection_t * conn; 2176 uint8_t status; 2177 #endif 2178 // get num cmd packets - limit to 1 to reduce complexity 2179 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2180 2181 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2182 switch (opcode){ 2183 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2184 if (packet[5]) break; 2185 // terminate, name 248 chars 2186 packet[6+248] = 0; 2187 log_info("local name: %s", &packet[6]); 2188 break; 2189 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2190 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2191 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2192 uint16_t acl_len = little_endian_read_16(packet, 6); 2193 uint16_t sco_len = packet[8]; 2194 2195 // determine usable ACL/SCO payload size 2196 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2197 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2198 2199 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2200 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2201 2202 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2203 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2204 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2205 } 2206 break; 2207 case HCI_OPCODE_HCI_READ_RSSI: 2208 if (packet[5] == ERROR_CODE_SUCCESS){ 2209 uint8_t event[5]; 2210 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2211 event[1] = 3; 2212 (void)memcpy(&event[2], &packet[6], 3); 2213 hci_emit_event(event, sizeof(event), 1); 2214 } 2215 break; 2216 #ifdef ENABLE_BLE 2217 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2218 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2219 hci_stack->le_acl_packets_total_num = packet[8]; 2220 // determine usable ACL payload size 2221 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2222 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2223 } 2224 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2225 break; 2226 #endif 2227 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2228 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2229 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2230 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2231 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); 2232 break; 2233 #endif 2234 #ifdef ENABLE_LE_CENTRAL 2235 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2236 hci_stack->le_whitelist_capacity = packet[6]; 2237 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2238 break; 2239 #endif 2240 case HCI_OPCODE_HCI_READ_BD_ADDR: 2241 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2242 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)); 2243 #ifdef ENABLE_CLASSIC 2244 if (hci_stack->link_key_db){ 2245 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2246 } 2247 #endif 2248 break; 2249 #ifdef ENABLE_CLASSIC 2250 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2251 hci_emit_discoverable_enabled(hci_stack->discoverable); 2252 break; 2253 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2254 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2255 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2256 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2257 hci_emit_event(event, sizeof(event), 1); 2258 } 2259 break; 2260 #endif 2261 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2262 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2263 2264 #ifdef ENABLE_CLASSIC 2265 // determine usable ACL packet types based on host buffer size and supported features 2266 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2267 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2268 #endif 2269 // Classic/LE 2270 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2271 break; 2272 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2273 manufacturer = little_endian_read_16(packet, 10); 2274 // map Cypress to Broadcom 2275 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2276 log_info("Treat Cypress as Broadcom"); 2277 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2278 little_endian_store_16(packet, 10, manufacturer); 2279 } 2280 hci_stack->manufacturer = manufacturer; 2281 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2282 break; 2283 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2284 hci_stack->local_supported_commands[0] = 2285 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2286 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2287 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2288 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2289 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2290 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2291 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2292 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2293 hci_stack->local_supported_commands[1] = 2294 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2295 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2296 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2297 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2298 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2299 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2300 break; 2301 #ifdef ENABLE_CLASSIC 2302 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2303 if (packet[5]) return; 2304 hci_stack->synchronous_flow_control_enabled = 1; 2305 break; 2306 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2307 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2308 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2309 conn = hci_connection_for_handle(handle); 2310 if (conn != NULL) { 2311 uint8_t key_size = 0; 2312 if (status == 0){ 2313 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2314 log_info("Handle %04x key Size: %u", handle, key_size); 2315 } else { 2316 key_size = 1; 2317 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2318 } 2319 hci_handle_read_encryption_key_size_complete(conn, key_size); 2320 } 2321 break; 2322 // assert pairing complete event is emitted. 2323 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2324 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2325 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2326 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2327 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2328 // lookup connection by gap pairing addr 2329 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2330 if (conn == NULL) break; 2331 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2332 break; 2333 2334 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2335 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2336 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2337 uint8_t event[67]; 2338 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2339 event[1] = 65; 2340 (void)memset(&event[2], 0, 65); 2341 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2342 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2343 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2344 event[2] = 3; 2345 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2346 } else { 2347 event[2] = 1; 2348 } 2349 } 2350 hci_emit_event(event, sizeof(event), 0); 2351 break; 2352 } 2353 2354 // note: only needed if user does not provide OOB data 2355 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2356 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2357 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2358 if (conn == NULL) break; 2359 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2360 break; 2361 #endif 2362 #endif 2363 default: 2364 break; 2365 } 2366 } 2367 2368 #ifdef ENABLE_BLE 2369 static void event_handle_le_connection_complete(const uint8_t * packet){ 2370 bd_addr_t addr; 2371 bd_addr_type_t addr_type; 2372 hci_connection_t * conn; 2373 2374 // Connection management 2375 reverse_bd_addr(&packet[8], addr); 2376 addr_type = (bd_addr_type_t)packet[7]; 2377 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2378 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2379 2380 #ifdef ENABLE_LE_CENTRAL 2381 // handle error: error is reported only to the initiator -> outgoing connection 2382 if (packet[3]){ 2383 2384 // handle cancelled outgoing connection 2385 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2386 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2387 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2388 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2389 // reset state 2390 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2391 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2392 // get outgoing connection conn struct for direct connect 2393 conn = gap_get_outgoing_connection(); 2394 } 2395 2396 // outgoing le connection establishment is done 2397 if (conn){ 2398 // remove entry 2399 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2400 btstack_memory_hci_connection_free( conn ); 2401 } 2402 return; 2403 } 2404 #endif 2405 2406 // on success, both hosts receive connection complete event 2407 if (packet[6] == HCI_ROLE_MASTER){ 2408 #ifdef ENABLE_LE_CENTRAL 2409 // if we're master on an le connection, it was an outgoing connection and we're done with it 2410 // note: no hci_connection_t object exists yet for connect with whitelist 2411 if (hci_is_le_connection_type(addr_type)){ 2412 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2413 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2414 } 2415 #endif 2416 } else { 2417 #ifdef ENABLE_LE_PERIPHERAL 2418 // if we're slave, it was an incoming connection, advertisements have stopped 2419 hci_stack->le_advertisements_active = false; 2420 #endif 2421 } 2422 2423 // LE connections are auto-accepted, so just create a connection if there isn't one already 2424 if (!conn){ 2425 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2426 } 2427 2428 // no memory, sorry. 2429 if (!conn){ 2430 return; 2431 } 2432 2433 conn->state = OPEN; 2434 conn->role = packet[6]; 2435 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2436 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2437 2438 #ifdef ENABLE_LE_PERIPHERAL 2439 if (packet[6] == HCI_ROLE_SLAVE){ 2440 hci_update_advertisements_enabled_for_current_roles(); 2441 } 2442 #endif 2443 2444 // init unenhanced att bearer mtu 2445 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2446 conn->att_connection.mtu_exchanged = false; 2447 2448 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2449 2450 // restart timer 2451 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2452 // btstack_run_loop_add_timer(&conn->timeout); 2453 2454 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2455 2456 hci_emit_nr_connections_changed(); 2457 } 2458 #endif 2459 2460 #ifdef ENABLE_CLASSIC 2461 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){ 2462 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2463 // LEVEL_4 is tested by l2cap 2464 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2465 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2466 if (level >= LEVEL_3){ 2467 // MITM not possible without keyboard or display 2468 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2469 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2470 2471 // MITM possible if one side has keyboard and the other has keyboard or display 2472 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2473 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2474 2475 // MITM not possible if one side has only display and other side has no keyboard 2476 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2477 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2478 } 2479 // LEVEL 2 requires SSP, which is a given 2480 return true; 2481 } 2482 2483 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2484 uint16_t i; 2485 for (i=0; i < size ; i++){ 2486 if (data[i] != 0) { 2487 return false; 2488 } 2489 } 2490 return true; 2491 } 2492 2493 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2494 // get requested security level 2495 gap_security_level_t requested_security_level = conn->requested_security_level; 2496 if (hci_stack->gap_secure_connections_only_mode){ 2497 requested_security_level = LEVEL_4; 2498 } 2499 2500 // assess security: LEVEL 4 requires SC 2501 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2502 if ((requested_security_level == LEVEL_4) && 2503 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2504 !hci_remote_sc_enabled(conn)){ 2505 log_info("Level 4 required, but SC not supported -> abort"); 2506 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2507 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2508 return; 2509 } 2510 2511 // assess security based on io capabilities 2512 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2513 // responder: fully validate io caps of both sides as well as OOB data 2514 bool security_possible = false; 2515 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2516 2517 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2518 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2519 // so we merge the OOB data availability 2520 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2521 if (conn->classic_oob_c_192 != NULL){ 2522 have_oob_data |= 1; 2523 } 2524 if (conn->classic_oob_c_256 != NULL){ 2525 have_oob_data |= 2; 2526 } 2527 // for up to Level 3, either P-192 as well as P-256 will do 2528 // 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 2529 // if remote does not SC, we should not receive P-256 data either 2530 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2531 security_possible = true; 2532 } 2533 // for Level 4, P-256 is needed 2534 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2535 security_possible = true; 2536 } 2537 #endif 2538 2539 if (security_possible == false){ 2540 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2541 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2542 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2543 return; 2544 } 2545 } else { 2546 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2547 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2548 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2549 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2550 log_info("Level 3+ required, but no input/output -> abort"); 2551 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2552 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2553 return; 2554 } 2555 #endif 2556 #endif 2557 } 2558 2559 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2560 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2561 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2562 } else { 2563 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2564 } 2565 #endif 2566 } 2567 2568 #endif 2569 2570 static void event_handler(uint8_t *packet, uint16_t size){ 2571 2572 uint16_t event_length = packet[1]; 2573 2574 // assert packet is complete 2575 if (size != (event_length + 2u)){ 2576 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2577 return; 2578 } 2579 2580 bd_addr_type_t addr_type; 2581 hci_con_handle_t handle; 2582 hci_connection_t * conn; 2583 int i; 2584 int create_connection_cmd; 2585 2586 #ifdef ENABLE_CLASSIC 2587 hci_link_type_t link_type; 2588 bd_addr_t addr; 2589 #endif 2590 2591 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2592 2593 switch (hci_event_packet_get_type(packet)) { 2594 2595 case HCI_EVENT_COMMAND_COMPLETE: 2596 handle_command_complete_event(packet, size); 2597 break; 2598 2599 case HCI_EVENT_COMMAND_STATUS: 2600 // get num cmd packets - limit to 1 to reduce complexity 2601 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2602 2603 // check command status to detected failed outgoing connections 2604 create_connection_cmd = 0; 2605 #ifdef ENABLE_CLASSIC 2606 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2607 create_connection_cmd = 1; 2608 } 2609 #endif 2610 #ifdef ENABLE_LE_CENTRAL 2611 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2612 create_connection_cmd = 1; 2613 } 2614 #endif 2615 if (create_connection_cmd) { 2616 uint8_t status = hci_event_command_status_get_status(packet); 2617 addr_type = hci_stack->outgoing_addr_type; 2618 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2619 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); 2620 2621 // reset outgoing address info 2622 memset(hci_stack->outgoing_addr, 0, 6); 2623 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2624 2625 // on error 2626 if (status != ERROR_CODE_SUCCESS){ 2627 #ifdef ENABLE_LE_CENTRAL 2628 if (hci_is_le_connection_type(addr_type)){ 2629 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2630 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2631 } 2632 #endif 2633 // error => outgoing connection failed 2634 if (conn != NULL){ 2635 hci_handle_connection_failed(conn, status); 2636 } 2637 } 2638 } 2639 2640 #ifdef ENABLE_CLASSIC 2641 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2642 uint8_t status = hci_event_command_status_get_status(packet); 2643 log_info("command status (inquiry), status %x", status); 2644 if (status == ERROR_CODE_SUCCESS) { 2645 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2646 } else { 2647 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2648 } 2649 } 2650 #endif 2651 break; 2652 2653 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2654 if (size < 3) return; 2655 uint16_t num_handles = packet[2]; 2656 if (size != (3u + num_handles * 4u)) return; 2657 uint16_t offset = 3; 2658 for (i=0; i<num_handles;i++){ 2659 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2660 offset += 2u; 2661 uint16_t num_packets = little_endian_read_16(packet, offset); 2662 offset += 2u; 2663 2664 conn = hci_connection_for_handle(handle); 2665 if (!conn){ 2666 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2667 continue; 2668 } 2669 2670 if (conn->num_packets_sent >= num_packets){ 2671 conn->num_packets_sent -= num_packets; 2672 } else { 2673 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2674 conn->num_packets_sent = 0; 2675 } 2676 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2677 2678 #ifdef ENABLE_CLASSIC 2679 // For SCO, we do the can_send_now_check here 2680 hci_notify_if_sco_can_send_now(); 2681 #endif 2682 } 2683 break; 2684 } 2685 2686 #ifdef ENABLE_CLASSIC 2687 case HCI_EVENT_INQUIRY_COMPLETE: 2688 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2689 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2690 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2691 hci_emit_event(event, sizeof(event), 1); 2692 } 2693 break; 2694 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2695 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2696 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2697 } 2698 break; 2699 case HCI_EVENT_CONNECTION_REQUEST: 2700 reverse_bd_addr(&packet[2], addr); 2701 link_type = (hci_link_type_t) packet[11]; 2702 2703 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2704 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2705 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2706 bd_addr_copy(hci_stack->decline_addr, addr); 2707 break; 2708 } 2709 2710 if (hci_stack->gap_classic_accept_callback != NULL){ 2711 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2712 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2713 bd_addr_copy(hci_stack->decline_addr, addr); 2714 break; 2715 } 2716 } 2717 2718 // TODO: eval COD 8-10 2719 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2720 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2721 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2722 if (!conn) { 2723 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2724 } 2725 if (!conn) { 2726 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2727 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2728 bd_addr_copy(hci_stack->decline_addr, addr); 2729 break; 2730 } 2731 conn->role = HCI_ROLE_SLAVE; 2732 conn->state = RECEIVED_CONNECTION_REQUEST; 2733 // store info about eSCO 2734 if (link_type == HCI_LINK_TYPE_ESCO){ 2735 conn->remote_supported_features[0] |= 1; 2736 } 2737 hci_run(); 2738 break; 2739 2740 case HCI_EVENT_CONNECTION_COMPLETE: 2741 // Connection management 2742 reverse_bd_addr(&packet[5], addr); 2743 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2744 addr_type = BD_ADDR_TYPE_ACL; 2745 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2746 if (conn) { 2747 if (!packet[2]){ 2748 conn->state = OPEN; 2749 conn->con_handle = little_endian_read_16(packet, 3); 2750 2751 // queue get remote feature 2752 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2753 2754 // queue set supervision timeout if we're master 2755 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2756 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2757 } 2758 2759 // restart timer 2760 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2761 btstack_run_loop_add_timer(&conn->timeout); 2762 2763 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2764 2765 hci_emit_nr_connections_changed(); 2766 } else { 2767 // connection failed 2768 hci_handle_connection_failed(conn, packet[2]); 2769 } 2770 } 2771 break; 2772 2773 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2774 reverse_bd_addr(&packet[5], addr); 2775 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2776 if (packet[2]){ 2777 // connection failed 2778 break; 2779 } 2780 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2781 if (!conn) { 2782 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2783 } 2784 if (!conn) { 2785 break; 2786 } 2787 conn->state = OPEN; 2788 conn->con_handle = little_endian_read_16(packet, 3); 2789 2790 #ifdef ENABLE_SCO_OVER_HCI 2791 // update SCO 2792 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2793 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2794 } 2795 // trigger can send now 2796 if (hci_have_usb_transport()){ 2797 hci_stack->sco_can_send_now = true; 2798 } 2799 #endif 2800 #ifdef HAVE_SCO_TRANSPORT 2801 // configure sco transport 2802 if (hci_stack->sco_transport != NULL){ 2803 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2804 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2805 } 2806 #endif 2807 break; 2808 2809 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2810 handle = little_endian_read_16(packet, 3); 2811 conn = hci_connection_for_handle(handle); 2812 if (!conn) break; 2813 if (!packet[2]){ 2814 const uint8_t * features = &packet[5]; 2815 hci_handle_remote_features_page_0(conn, features); 2816 2817 // read extended features if possible 2818 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2819 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2820 break; 2821 } 2822 } 2823 hci_handle_remote_features_received(conn); 2824 break; 2825 2826 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2827 handle = little_endian_read_16(packet, 3); 2828 conn = hci_connection_for_handle(handle); 2829 if (!conn) break; 2830 // status = ok, page = 1 2831 if (!packet[2]) { 2832 uint8_t page_number = packet[5]; 2833 uint8_t maximum_page_number = packet[6]; 2834 const uint8_t * features = &packet[7]; 2835 bool done = false; 2836 switch (page_number){ 2837 case 1: 2838 hci_handle_remote_features_page_1(conn, features); 2839 if (maximum_page_number >= 2){ 2840 // get Secure Connections (Controller) from Page 2 if available 2841 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2842 } else { 2843 // otherwise, assume SC (Controller) == SC (Host) 2844 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2845 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2846 } 2847 done = true; 2848 } 2849 break; 2850 case 2: 2851 hci_handle_remote_features_page_2(conn, features); 2852 done = true; 2853 break; 2854 default: 2855 break; 2856 } 2857 if (!done) break; 2858 } 2859 hci_handle_remote_features_received(conn); 2860 break; 2861 2862 case HCI_EVENT_LINK_KEY_REQUEST: 2863 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2864 hci_event_link_key_request_get_bd_addr(packet, addr); 2865 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2866 if (!conn) break; 2867 2868 // lookup link key in db if not cached 2869 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2870 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2871 } 2872 2873 // response sent by hci_run() 2874 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2875 #endif 2876 break; 2877 2878 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2879 hci_event_link_key_request_get_bd_addr(packet, addr); 2880 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2881 if (!conn) break; 2882 2883 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2884 2885 // CVE-2020-26555: ignore NULL link key 2886 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2887 if (btstack_is_null(&packet[8], 16)) break; 2888 2889 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2890 // Change Connection Encryption keeps link key type 2891 if (link_key_type != CHANGED_COMBINATION_KEY){ 2892 conn->link_key_type = link_key_type; 2893 } 2894 2895 // cache link key. link keys stored in little-endian format for legacy reasons 2896 memcpy(&conn->link_key, &packet[8], 16); 2897 2898 // only store link key: 2899 // - if bondable enabled 2900 if (hci_stack->bondable == false) break; 2901 // - if security level sufficient 2902 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2903 // - for SSP, also check if remote side requested bonding as well 2904 if (conn->link_key_type != COMBINATION_KEY){ 2905 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2906 if (!remote_bonding){ 2907 break; 2908 } 2909 } 2910 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2911 break; 2912 } 2913 2914 case HCI_EVENT_PIN_CODE_REQUEST: 2915 hci_event_pin_code_request_get_bd_addr(packet, addr); 2916 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2917 if (!conn) break; 2918 2919 hci_pairing_started(conn, false); 2920 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2921 if (!hci_stack->bondable ){ 2922 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2923 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2924 hci_run(); 2925 return; 2926 } 2927 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2928 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2929 log_info("Level 4 required, but SC not supported -> abort"); 2930 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2931 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2932 hci_run(); 2933 return; 2934 } 2935 break; 2936 2937 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2938 hci_event_io_capability_response_get_bd_addr(packet, addr); 2939 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2940 if (!conn) break; 2941 2942 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2943 hci_pairing_started(conn, true); 2944 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2945 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2946 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2947 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2948 #endif 2949 break; 2950 2951 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2952 hci_event_io_capability_response_get_bd_addr(packet, addr); 2953 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2954 if (!conn) break; 2955 2956 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2957 hci_connection_timestamp(conn); 2958 hci_pairing_started(conn, true); 2959 break; 2960 2961 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2962 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2963 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2964 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2965 if (!conn) break; 2966 2967 hci_connection_timestamp(conn); 2968 2969 hci_pairing_started(conn, true); 2970 2971 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2972 break; 2973 #endif 2974 2975 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2976 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2977 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2978 if (!conn) break; 2979 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2980 if (hci_stack->ssp_auto_accept){ 2981 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2982 }; 2983 } else { 2984 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2985 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2986 // don't forward event to app 2987 hci_run(); 2988 return; 2989 } 2990 break; 2991 2992 case HCI_EVENT_USER_PASSKEY_REQUEST: 2993 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2994 if (hci_stack->ssp_auto_accept){ 2995 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2996 }; 2997 break; 2998 2999 case HCI_EVENT_MODE_CHANGE: 3000 handle = hci_event_mode_change_get_handle(packet); 3001 conn = hci_connection_for_handle(handle); 3002 if (!conn) break; 3003 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3004 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3005 break; 3006 #endif 3007 3008 case HCI_EVENT_ENCRYPTION_CHANGE: 3009 handle = hci_event_encryption_change_get_connection_handle(packet); 3010 conn = hci_connection_for_handle(handle); 3011 if (!conn) break; 3012 if (hci_event_encryption_change_get_status(packet) == 0u) { 3013 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3014 if (encryption_enabled){ 3015 if (hci_is_le_connection(conn)){ 3016 // For LE, we accept connection as encrypted 3017 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3018 } 3019 #ifdef ENABLE_CLASSIC 3020 else { 3021 3022 // dedicated bonding: send result and disconnect 3023 if (conn->bonding_flags & BONDING_DEDICATED){ 3024 conn->bonding_flags &= ~BONDING_DEDICATED; 3025 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3026 conn->bonding_status = packet[2]; 3027 break; 3028 } 3029 3030 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3031 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3032 bool connected_uses_aes_ccm = encryption_enabled == 2; 3033 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3034 log_info("SC during pairing, but only E0 now -> abort"); 3035 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3036 break; 3037 } 3038 3039 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3040 if (connected_uses_aes_ccm){ 3041 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3042 } 3043 3044 #ifdef ENABLE_TESTING_SUPPORT 3045 // work around for issue with PTS dongle 3046 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3047 #endif 3048 3049 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3050 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3051 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3052 } else { 3053 // if not, pretend everything is perfect 3054 hci_handle_read_encryption_key_size_complete(conn, 16); 3055 } 3056 } 3057 #endif 3058 } else { 3059 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3060 } 3061 } 3062 3063 break; 3064 3065 #ifdef ENABLE_CLASSIC 3066 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3067 handle = hci_event_authentication_complete_get_connection_handle(packet); 3068 conn = hci_connection_for_handle(handle); 3069 if (!conn) break; 3070 3071 // clear authentication active flag 3072 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3073 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3074 3075 // authenticated only if auth status == 0 3076 if (hci_event_authentication_complete_get_status(packet) == 0){ 3077 // authenticated 3078 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3079 3080 // If not already encrypted, start encryption 3081 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3082 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3083 break; 3084 } 3085 } 3086 3087 // emit updated security level 3088 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3089 break; 3090 3091 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3092 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3093 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3094 if (!conn) break; 3095 3096 // treat successfully paired connection as authenticated 3097 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3098 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3099 } 3100 3101 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3102 break; 3103 #endif 3104 3105 // HCI_EVENT_DISCONNECTION_COMPLETE 3106 // has been split, to first notify stack before shutting connection down 3107 // see end of function, too. 3108 case HCI_EVENT_DISCONNECTION_COMPLETE: 3109 if (packet[2]) break; // status != 0 3110 handle = little_endian_read_16(packet, 3); 3111 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3112 if (hci_stack->acl_fragmentation_total_size > 0u) { 3113 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3114 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3115 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3116 hci_stack->acl_fragmentation_total_size = 0; 3117 hci_stack->acl_fragmentation_pos = 0; 3118 if (release_buffer){ 3119 hci_release_packet_buffer(); 3120 } 3121 } 3122 } 3123 3124 conn = hci_connection_for_handle(handle); 3125 if (!conn) break; 3126 #ifdef ENABLE_CLASSIC 3127 // pairing failed if it was ongoing 3128 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3129 #endif 3130 3131 // emit dedicatd bonding event 3132 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3133 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3134 } 3135 3136 // mark connection for shutdown, stop timers, reset state 3137 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3138 hci_connection_stop_timer(conn); 3139 hci_connection_init(conn); 3140 3141 #ifdef ENABLE_BLE 3142 #ifdef ENABLE_LE_PERIPHERAL 3143 // re-enable advertisements for le connections if active 3144 if (hci_is_le_connection(conn)){ 3145 hci_update_advertisements_enabled_for_current_roles(); 3146 } 3147 #endif 3148 #endif 3149 break; 3150 3151 case HCI_EVENT_HARDWARE_ERROR: 3152 log_error("Hardware Error: 0x%02x", packet[2]); 3153 if (hci_stack->hardware_error_callback){ 3154 (*hci_stack->hardware_error_callback)(packet[2]); 3155 } else { 3156 // if no special requests, just reboot stack 3157 hci_power_control_off(); 3158 hci_power_control_on(); 3159 } 3160 break; 3161 3162 #ifdef ENABLE_CLASSIC 3163 case HCI_EVENT_ROLE_CHANGE: 3164 if (packet[2]) break; // status != 0 3165 reverse_bd_addr(&packet[3], addr); 3166 addr_type = BD_ADDR_TYPE_ACL; 3167 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3168 if (!conn) break; 3169 conn->role = packet[9]; 3170 break; 3171 #endif 3172 3173 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3174 // release packet buffer only for asynchronous transport and if there are not further fragements 3175 if (hci_transport_synchronous()) { 3176 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3177 return; // instead of break: to avoid re-entering hci_run() 3178 } 3179 hci_stack->acl_fragmentation_tx_active = 0; 3180 if (hci_stack->acl_fragmentation_total_size) break; 3181 hci_release_packet_buffer(); 3182 3183 // L2CAP receives this event via the hci_emit_event below 3184 3185 #ifdef ENABLE_CLASSIC 3186 // For SCO, we do the can_send_now_check here 3187 hci_notify_if_sco_can_send_now(); 3188 #endif 3189 break; 3190 3191 #ifdef ENABLE_CLASSIC 3192 case HCI_EVENT_SCO_CAN_SEND_NOW: 3193 // For SCO, we do the can_send_now_check here 3194 hci_stack->sco_can_send_now = true; 3195 hci_notify_if_sco_can_send_now(); 3196 return; 3197 3198 // explode inquriy results for easier consumption 3199 case HCI_EVENT_INQUIRY_RESULT: 3200 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3201 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3202 gap_inquiry_explode(packet, size); 3203 break; 3204 #endif 3205 3206 #ifdef ENABLE_BLE 3207 case HCI_EVENT_LE_META: 3208 switch (packet[2]){ 3209 #ifdef ENABLE_LE_CENTRAL 3210 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3211 // log_info("advertising report received"); 3212 if (!hci_stack->le_scanning_enabled) break; 3213 le_handle_advertisement_report(packet, size); 3214 break; 3215 #endif 3216 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3217 event_handle_le_connection_complete(packet); 3218 break; 3219 3220 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3221 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3222 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3223 conn = hci_connection_for_handle(handle); 3224 if (!conn) break; 3225 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3226 break; 3227 3228 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3229 // connection 3230 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3231 conn = hci_connection_for_handle(handle); 3232 if (conn) { 3233 // read arguments 3234 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3235 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3236 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3237 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3238 3239 // validate against current connection parameter range 3240 le_connection_parameter_range_t existing_range; 3241 gap_get_connection_parameter_range(&existing_range); 3242 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3243 if (update_parameter){ 3244 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3245 conn->le_conn_interval_min = le_conn_interval_min; 3246 conn->le_conn_interval_max = le_conn_interval_max; 3247 conn->le_conn_latency = le_conn_latency; 3248 conn->le_supervision_timeout = le_supervision_timeout; 3249 } else { 3250 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3251 } 3252 } 3253 break; 3254 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3255 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3256 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3257 conn = hci_connection_for_handle(handle); 3258 if (conn) { 3259 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3260 } 3261 break; 3262 #endif 3263 default: 3264 break; 3265 } 3266 break; 3267 #endif 3268 case HCI_EVENT_VENDOR_SPECIFIC: 3269 // Vendor specific commands often create vendor specific event instead of num completed packets 3270 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3271 switch (hci_stack->manufacturer){ 3272 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3273 hci_stack->num_cmd_packets = 1; 3274 break; 3275 default: 3276 break; 3277 } 3278 break; 3279 default: 3280 break; 3281 } 3282 3283 handle_event_for_current_stack_state(packet, size); 3284 3285 // notify upper stack 3286 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3287 3288 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3289 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3290 handle = little_endian_read_16(packet, 3); 3291 hci_connection_t * aConn = hci_connection_for_handle(handle); 3292 // discard connection if app did not trigger a reconnect in the event handler 3293 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3294 hci_shutdown_connection(aConn); 3295 } 3296 } 3297 3298 // execute main loop 3299 hci_run(); 3300 } 3301 3302 #ifdef ENABLE_CLASSIC 3303 3304 #ifdef ENABLE_SCO_OVER_HCI 3305 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3306 static void sco_schedule_tx(hci_connection_t * conn); 3307 3308 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3309 log_debug("SCO TX Timeout"); 3310 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3311 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3312 if (!conn) return; 3313 3314 // trigger send 3315 conn->sco_tx_ready = 1; 3316 // extra packet if CVSD but SCO buffer is too short 3317 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3318 conn->sco_tx_ready++; 3319 } 3320 hci_notify_if_sco_can_send_now(); 3321 } 3322 3323 3324 #define SCO_TX_AFTER_RX_MS (6) 3325 3326 static void sco_schedule_tx(hci_connection_t * conn){ 3327 3328 uint32_t now = btstack_run_loop_get_time_ms(); 3329 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3330 int time_delta_ms = sco_tx_ms - now; 3331 3332 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3333 3334 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3335 btstack_run_loop_remove_timer(timer); 3336 btstack_run_loop_set_timer(timer, time_delta_ms); 3337 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3338 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3339 btstack_run_loop_add_timer(timer); 3340 } 3341 #endif 3342 3343 static void sco_handler(uint8_t * packet, uint16_t size){ 3344 // lookup connection struct 3345 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3346 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3347 if (!conn) return; 3348 3349 #ifdef ENABLE_SCO_OVER_HCI 3350 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3351 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3352 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3353 packet[2] = 0x3c; 3354 memmove(&packet[3], &packet[23], 63); 3355 size = 63; 3356 } 3357 } 3358 3359 if (hci_have_usb_transport()){ 3360 // Nothing to do 3361 } else { 3362 // 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); 3363 if (hci_stack->synchronous_flow_control_enabled == 0){ 3364 uint32_t now = btstack_run_loop_get_time_ms(); 3365 3366 if (!conn->sco_rx_valid){ 3367 // ignore first 10 packets 3368 conn->sco_rx_count++; 3369 // log_debug("sco rx count %u", conn->sco_rx_count); 3370 if (conn->sco_rx_count == 10) { 3371 // use first timestamp as is and pretent it just started 3372 conn->sco_rx_ms = now; 3373 conn->sco_rx_valid = 1; 3374 conn->sco_rx_count = 0; 3375 sco_schedule_tx(conn); 3376 } 3377 } else { 3378 // track expected arrival timme 3379 conn->sco_rx_count++; 3380 conn->sco_rx_ms += 7; 3381 int delta = (int32_t) (now - conn->sco_rx_ms); 3382 if (delta > 0){ 3383 conn->sco_rx_ms++; 3384 } 3385 // log_debug("sco rx %u", conn->sco_rx_ms); 3386 sco_schedule_tx(conn); 3387 } 3388 } 3389 } 3390 #endif 3391 3392 // deliver to app 3393 if (hci_stack->sco_packet_handler) { 3394 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3395 } 3396 3397 #ifdef HAVE_SCO_TRANSPORT 3398 // We can send one packet for each received packet 3399 conn->sco_tx_ready++; 3400 hci_notify_if_sco_can_send_now(); 3401 #endif 3402 3403 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3404 conn->num_packets_completed++; 3405 hci_stack->host_completed_packets = 1; 3406 hci_run(); 3407 #endif 3408 } 3409 #endif 3410 3411 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3412 hci_dump_packet(packet_type, 1, packet, size); 3413 switch (packet_type) { 3414 case HCI_EVENT_PACKET: 3415 event_handler(packet, size); 3416 break; 3417 case HCI_ACL_DATA_PACKET: 3418 acl_handler(packet, size); 3419 break; 3420 #ifdef ENABLE_CLASSIC 3421 case HCI_SCO_DATA_PACKET: 3422 sco_handler(packet, size); 3423 break; 3424 #endif 3425 default: 3426 break; 3427 } 3428 } 3429 3430 /** 3431 * @brief Add event packet handler. 3432 */ 3433 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3434 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3435 } 3436 3437 3438 /** Register HCI packet handlers */ 3439 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3440 hci_stack->acl_packet_handler = handler; 3441 } 3442 3443 #ifdef ENABLE_CLASSIC 3444 /** 3445 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3446 */ 3447 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3448 hci_stack->sco_packet_handler = handler; 3449 } 3450 #endif 3451 3452 static void hci_state_reset(void){ 3453 // no connections yet 3454 hci_stack->connections = NULL; 3455 3456 // keep discoverable/connectable as this has been requested by the client(s) 3457 // hci_stack->discoverable = 0; 3458 // hci_stack->connectable = 0; 3459 // hci_stack->bondable = 1; 3460 // hci_stack->own_addr_type = 0; 3461 3462 // buffer is free 3463 hci_stack->hci_packet_buffer_reserved = false; 3464 3465 // no pending cmds 3466 hci_stack->decline_reason = 0; 3467 3468 hci_stack->secure_connections_active = false; 3469 3470 #ifdef ENABLE_CLASSIC 3471 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3472 hci_stack->gap_tasks = 3473 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3474 GAP_TASK_SET_CLASS_OF_DEVICE | 3475 GAP_TASK_SET_LOCAL_NAME | 3476 GAP_TASK_SET_EIR_DATA | 3477 GAP_TASK_WRITE_SCAN_ENABLE; 3478 #endif 3479 3480 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3481 hci_stack->classic_read_local_oob_data = true; 3482 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3483 #endif 3484 3485 // LE 3486 #ifdef ENABLE_BLE 3487 memset(hci_stack->le_random_address, 0, 6); 3488 hci_stack->le_random_address_set = 0; 3489 #endif 3490 #ifdef ENABLE_LE_CENTRAL 3491 hci_stack->le_scanning_active = false; 3492 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3493 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3494 hci_stack->le_whitelist_capacity = 0; 3495 #endif 3496 #ifdef ENABLE_LE_PERIPHERAL 3497 hci_stack->le_advertisements_active = false; 3498 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3499 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3500 } 3501 if (hci_stack->le_advertisements_data != NULL){ 3502 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3503 } 3504 #endif 3505 } 3506 3507 #ifdef ENABLE_CLASSIC 3508 /** 3509 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3510 */ 3511 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3512 // store and open remote device db 3513 hci_stack->link_key_db = link_key_db; 3514 if (hci_stack->link_key_db) { 3515 hci_stack->link_key_db->open(); 3516 } 3517 } 3518 #endif 3519 3520 void hci_init(const hci_transport_t *transport, const void *config){ 3521 3522 #ifdef HAVE_MALLOC 3523 if (!hci_stack) { 3524 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3525 } 3526 #else 3527 hci_stack = &hci_stack_static; 3528 #endif 3529 memset(hci_stack, 0, sizeof(hci_stack_t)); 3530 3531 // reference to use transport layer implementation 3532 hci_stack->hci_transport = transport; 3533 3534 // reference to used config 3535 hci_stack->config = config; 3536 3537 // setup pointer for outgoing packet buffer 3538 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3539 3540 // max acl payload size defined in config.h 3541 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3542 3543 // register packet handlers with transport 3544 transport->register_packet_handler(&packet_handler); 3545 3546 hci_stack->state = HCI_STATE_OFF; 3547 3548 // class of device 3549 hci_stack->class_of_device = 0x007a020c; // Smartphone 3550 3551 // bondable by default 3552 hci_stack->bondable = 1; 3553 3554 #ifdef ENABLE_CLASSIC 3555 // classic name 3556 hci_stack->local_name = default_classic_name; 3557 3558 // Master slave policy 3559 hci_stack->master_slave_policy = 1; 3560 3561 // Allow Role Switch 3562 hci_stack->allow_role_switch = 1; 3563 3564 // Default / minimum security level = 2 3565 hci_stack->gap_security_level = LEVEL_2; 3566 3567 // Default Security Mode 4 3568 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3569 3570 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3571 hci_stack->gap_required_encyrption_key_size = 7; 3572 3573 // Link Supervision Timeout 3574 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3575 3576 #endif 3577 3578 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3579 hci_stack->ssp_enable = 1; 3580 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3581 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3582 hci_stack->ssp_auto_accept = 1; 3583 3584 // Secure Connections: enable (requires support from Controller) 3585 hci_stack->secure_connections_enable = true; 3586 3587 // voice setting - signed 16 bit pcm data with CVSD over the air 3588 hci_stack->sco_voice_setting = 0x60; 3589 3590 #ifdef ENABLE_LE_CENTRAL 3591 // connection parameter to use for outgoing connections 3592 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3593 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3594 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3595 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3596 hci_stack->le_connection_latency = 4; // 4 3597 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3598 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3599 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3600 3601 // default LE Scanning 3602 hci_stack->le_scan_type = 0x1; // active 3603 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3604 hci_stack->le_scan_window = 0x30; // 30 ms 3605 #endif 3606 3607 #ifdef ENABLE_LE_PERIPHERAL 3608 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3609 #endif 3610 3611 // connection parameter range used to answer connection parameter update requests in l2cap 3612 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3613 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3614 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3615 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3616 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3617 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3618 3619 hci_state_reset(); 3620 } 3621 3622 void hci_deinit(void){ 3623 #ifdef HAVE_MALLOC 3624 if (hci_stack) { 3625 free(hci_stack); 3626 } 3627 #endif 3628 hci_stack = NULL; 3629 3630 #ifdef ENABLE_CLASSIC 3631 disable_l2cap_timeouts = 0; 3632 #endif 3633 } 3634 3635 /** 3636 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3637 */ 3638 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3639 hci_stack->chipset = chipset_driver; 3640 3641 // reset chipset driver - init is also called on power_up 3642 if (hci_stack->chipset && hci_stack->chipset->init){ 3643 hci_stack->chipset->init(hci_stack->config); 3644 } 3645 } 3646 3647 /** 3648 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3649 */ 3650 void hci_set_control(const btstack_control_t *hardware_control){ 3651 // references to used control implementation 3652 hci_stack->control = hardware_control; 3653 // init with transport config 3654 hardware_control->init(hci_stack->config); 3655 } 3656 3657 void hci_close(void){ 3658 3659 #ifdef ENABLE_CLASSIC 3660 // close remote device db 3661 if (hci_stack->link_key_db) { 3662 hci_stack->link_key_db->close(); 3663 } 3664 #endif 3665 3666 btstack_linked_list_iterator_t lit; 3667 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3668 while (btstack_linked_list_iterator_has_next(&lit)){ 3669 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3670 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3671 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3672 hci_shutdown_connection(connection); 3673 } 3674 3675 hci_power_control(HCI_POWER_OFF); 3676 3677 #ifdef HAVE_MALLOC 3678 free(hci_stack); 3679 #endif 3680 hci_stack = NULL; 3681 } 3682 3683 #ifdef HAVE_SCO_TRANSPORT 3684 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3685 hci_stack->sco_transport = sco_transport; 3686 sco_transport->register_packet_handler(&packet_handler); 3687 } 3688 #endif 3689 3690 #ifdef ENABLE_CLASSIC 3691 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3692 // validate ranage and set 3693 if (encryption_key_size < 7) return; 3694 if (encryption_key_size > 16) return; 3695 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3696 } 3697 3698 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3699 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3700 hci_stack->gap_security_mode = security_mode; 3701 return ERROR_CODE_SUCCESS; 3702 } else { 3703 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3704 } 3705 } 3706 3707 gap_security_mode_t gap_get_security_mode(void){ 3708 return hci_stack->gap_security_mode; 3709 } 3710 3711 void gap_set_security_level(gap_security_level_t security_level){ 3712 hci_stack->gap_security_level = security_level; 3713 } 3714 3715 gap_security_level_t gap_get_security_level(void){ 3716 if (hci_stack->gap_secure_connections_only_mode){ 3717 return LEVEL_4; 3718 } 3719 return hci_stack->gap_security_level; 3720 } 3721 3722 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3723 hci_stack->gap_minimal_service_security_level = security_level; 3724 } 3725 3726 void gap_set_secure_connections_only_mode(bool enable){ 3727 hci_stack->gap_secure_connections_only_mode = enable; 3728 } 3729 3730 bool gap_get_secure_connections_only_mode(void){ 3731 return hci_stack->gap_secure_connections_only_mode; 3732 } 3733 #endif 3734 3735 #ifdef ENABLE_CLASSIC 3736 void gap_set_class_of_device(uint32_t class_of_device){ 3737 hci_stack->class_of_device = class_of_device; 3738 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3739 hci_run(); 3740 } 3741 3742 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3743 hci_stack->default_link_policy_settings = default_link_policy_settings; 3744 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3745 hci_run(); 3746 } 3747 3748 void gap_set_allow_role_switch(bool allow_role_switch){ 3749 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3750 } 3751 3752 uint8_t hci_get_allow_role_switch(void){ 3753 return hci_stack->allow_role_switch; 3754 } 3755 3756 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3757 hci_stack->link_supervision_timeout = link_supervision_timeout; 3758 } 3759 3760 void hci_disable_l2cap_timeout_check(void){ 3761 disable_l2cap_timeouts = 1; 3762 } 3763 #endif 3764 3765 #ifndef HAVE_HOST_CONTROLLER_API 3766 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3767 void hci_set_bd_addr(bd_addr_t addr){ 3768 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3769 hci_stack->custom_bd_addr_set = 1; 3770 } 3771 #endif 3772 3773 // State-Module-Driver overview 3774 // state module low-level 3775 // HCI_STATE_OFF off close 3776 // HCI_STATE_INITIALIZING, on open 3777 // HCI_STATE_WORKING, on open 3778 // HCI_STATE_HALTING, on open 3779 // HCI_STATE_SLEEPING, off/sleep close 3780 // HCI_STATE_FALLING_ASLEEP on open 3781 3782 static int hci_power_control_on(void){ 3783 3784 // power on 3785 int err = 0; 3786 if (hci_stack->control && hci_stack->control->on){ 3787 err = (*hci_stack->control->on)(); 3788 } 3789 if (err){ 3790 log_error( "POWER_ON failed"); 3791 hci_emit_hci_open_failed(); 3792 return err; 3793 } 3794 3795 // int chipset driver 3796 if (hci_stack->chipset && hci_stack->chipset->init){ 3797 hci_stack->chipset->init(hci_stack->config); 3798 } 3799 3800 // init transport 3801 if (hci_stack->hci_transport->init){ 3802 hci_stack->hci_transport->init(hci_stack->config); 3803 } 3804 3805 // open transport 3806 err = hci_stack->hci_transport->open(); 3807 if (err){ 3808 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3809 if (hci_stack->control && hci_stack->control->off){ 3810 (*hci_stack->control->off)(); 3811 } 3812 hci_emit_hci_open_failed(); 3813 return err; 3814 } 3815 return 0; 3816 } 3817 3818 static void hci_power_control_off(void){ 3819 3820 log_info("hci_power_control_off"); 3821 3822 // close low-level device 3823 hci_stack->hci_transport->close(); 3824 3825 log_info("hci_power_control_off - hci_transport closed"); 3826 3827 // power off 3828 if (hci_stack->control && hci_stack->control->off){ 3829 (*hci_stack->control->off)(); 3830 } 3831 3832 log_info("hci_power_control_off - control closed"); 3833 3834 hci_stack->state = HCI_STATE_OFF; 3835 } 3836 3837 static void hci_power_control_sleep(void){ 3838 3839 log_info("hci_power_control_sleep"); 3840 3841 #if 0 3842 // don't close serial port during sleep 3843 3844 // close low-level device 3845 hci_stack->hci_transport->close(hci_stack->config); 3846 #endif 3847 3848 // sleep mode 3849 if (hci_stack->control && hci_stack->control->sleep){ 3850 (*hci_stack->control->sleep)(); 3851 } 3852 3853 hci_stack->state = HCI_STATE_SLEEPING; 3854 } 3855 3856 static int hci_power_control_wake(void){ 3857 3858 log_info("hci_power_control_wake"); 3859 3860 // wake on 3861 if (hci_stack->control && hci_stack->control->wake){ 3862 (*hci_stack->control->wake)(); 3863 } 3864 3865 #if 0 3866 // open low-level device 3867 int err = hci_stack->hci_transport->open(hci_stack->config); 3868 if (err){ 3869 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3870 if (hci_stack->control && hci_stack->control->off){ 3871 (*hci_stack->control->off)(); 3872 } 3873 hci_emit_hci_open_failed(); 3874 return err; 3875 } 3876 #endif 3877 3878 return 0; 3879 } 3880 3881 static void hci_power_transition_to_initializing(void){ 3882 // set up state machine 3883 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3884 hci_stack->hci_packet_buffer_reserved = false; 3885 hci_stack->state = HCI_STATE_INITIALIZING; 3886 hci_stack->substate = HCI_INIT_SEND_RESET; 3887 } 3888 3889 // returns error 3890 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3891 int err; 3892 switch (power_mode){ 3893 case HCI_POWER_ON: 3894 err = hci_power_control_on(); 3895 if (err != 0) { 3896 log_error("hci_power_control_on() error %d", err); 3897 return err; 3898 } 3899 hci_power_transition_to_initializing(); 3900 break; 3901 case HCI_POWER_OFF: 3902 // do nothing 3903 break; 3904 case HCI_POWER_SLEEP: 3905 // do nothing (with SLEEP == OFF) 3906 break; 3907 default: 3908 btstack_assert(false); 3909 break; 3910 } 3911 return ERROR_CODE_SUCCESS; 3912 } 3913 3914 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3915 switch (power_mode){ 3916 case HCI_POWER_ON: 3917 // do nothing 3918 break; 3919 case HCI_POWER_OFF: 3920 // no connections yet, just turn it off 3921 hci_power_control_off(); 3922 break; 3923 case HCI_POWER_SLEEP: 3924 // no connections yet, just turn it off 3925 hci_power_control_sleep(); 3926 break; 3927 default: 3928 btstack_assert(false); 3929 break; 3930 } 3931 return ERROR_CODE_SUCCESS; 3932 } 3933 3934 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3935 switch (power_mode){ 3936 case HCI_POWER_ON: 3937 // do nothing 3938 break; 3939 case HCI_POWER_OFF: 3940 // see hci_run 3941 hci_stack->state = HCI_STATE_HALTING; 3942 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3943 break; 3944 case HCI_POWER_SLEEP: 3945 // see hci_run 3946 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3947 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3948 break; 3949 default: 3950 btstack_assert(false); 3951 break; 3952 } 3953 return ERROR_CODE_SUCCESS; 3954 } 3955 3956 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3957 switch (power_mode){ 3958 case HCI_POWER_ON: 3959 hci_power_transition_to_initializing(); 3960 break; 3961 case HCI_POWER_OFF: 3962 // do nothing 3963 break; 3964 case HCI_POWER_SLEEP: 3965 // see hci_run 3966 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3967 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3968 break; 3969 default: 3970 btstack_assert(false); 3971 break; 3972 } 3973 return ERROR_CODE_SUCCESS; 3974 } 3975 3976 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3977 switch (power_mode){ 3978 case HCI_POWER_ON: 3979 hci_power_transition_to_initializing(); 3980 break; 3981 case HCI_POWER_OFF: 3982 // see hci_run 3983 hci_stack->state = HCI_STATE_HALTING; 3984 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3985 break; 3986 case HCI_POWER_SLEEP: 3987 // do nothing 3988 break; 3989 default: 3990 btstack_assert(false); 3991 break; 3992 } 3993 return ERROR_CODE_SUCCESS; 3994 } 3995 3996 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3997 int err; 3998 switch (power_mode){ 3999 case HCI_POWER_ON: 4000 err = hci_power_control_wake(); 4001 if (err) return err; 4002 hci_power_transition_to_initializing(); 4003 break; 4004 case HCI_POWER_OFF: 4005 hci_stack->state = HCI_STATE_HALTING; 4006 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4007 break; 4008 case HCI_POWER_SLEEP: 4009 // do nothing 4010 break; 4011 default: 4012 btstack_assert(false); 4013 break; 4014 } 4015 return ERROR_CODE_SUCCESS; 4016 } 4017 4018 int hci_power_control(HCI_POWER_MODE power_mode){ 4019 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4020 int err = 0; 4021 switch (hci_stack->state){ 4022 case HCI_STATE_OFF: 4023 err = hci_power_control_state_off(power_mode); 4024 break; 4025 case HCI_STATE_INITIALIZING: 4026 err = hci_power_control_state_initializing(power_mode); 4027 break; 4028 case HCI_STATE_WORKING: 4029 err = hci_power_control_state_working(power_mode); 4030 break; 4031 case HCI_STATE_HALTING: 4032 err = hci_power_control_state_halting(power_mode); 4033 break; 4034 case HCI_STATE_FALLING_ASLEEP: 4035 err = hci_power_control_state_falling_asleep(power_mode); 4036 break; 4037 case HCI_STATE_SLEEPING: 4038 err = hci_power_control_state_sleeping(power_mode); 4039 break; 4040 default: 4041 btstack_assert(false); 4042 break; 4043 } 4044 if (err != 0){ 4045 return err; 4046 } 4047 4048 // create internal event 4049 hci_emit_state(); 4050 4051 // trigger next/first action 4052 hci_run(); 4053 4054 return 0; 4055 } 4056 4057 4058 #ifdef ENABLE_CLASSIC 4059 4060 static void hci_update_scan_enable(void){ 4061 // 2 = page scan, 1 = inq scan 4062 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4063 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4064 hci_run(); 4065 } 4066 4067 void gap_discoverable_control(uint8_t enable){ 4068 if (enable) enable = 1; // normalize argument 4069 4070 if (hci_stack->discoverable == enable){ 4071 hci_emit_discoverable_enabled(hci_stack->discoverable); 4072 return; 4073 } 4074 4075 hci_stack->discoverable = enable; 4076 hci_update_scan_enable(); 4077 } 4078 4079 void gap_connectable_control(uint8_t enable){ 4080 if (enable) enable = 1; // normalize argument 4081 4082 // don't emit event 4083 if (hci_stack->connectable == enable) return; 4084 4085 hci_stack->connectable = enable; 4086 hci_update_scan_enable(); 4087 } 4088 #endif 4089 4090 void gap_local_bd_addr(bd_addr_t address_buffer){ 4091 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4092 } 4093 4094 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4095 static void hci_host_num_completed_packets(void){ 4096 4097 // create packet manually as arrays are not supported and num_commands should not get reduced 4098 hci_reserve_packet_buffer(); 4099 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4100 4101 uint16_t size = 0; 4102 uint16_t num_handles = 0; 4103 packet[size++] = 0x35; 4104 packet[size++] = 0x0c; 4105 size++; // skip param len 4106 size++; // skip num handles 4107 4108 // add { handle, packets } entries 4109 btstack_linked_item_t * it; 4110 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4111 hci_connection_t * connection = (hci_connection_t *) it; 4112 if (connection->num_packets_completed){ 4113 little_endian_store_16(packet, size, connection->con_handle); 4114 size += 2; 4115 little_endian_store_16(packet, size, connection->num_packets_completed); 4116 size += 2; 4117 // 4118 num_handles++; 4119 connection->num_packets_completed = 0; 4120 } 4121 } 4122 4123 packet[2] = size - 3; 4124 packet[3] = num_handles; 4125 4126 hci_stack->host_completed_packets = 0; 4127 4128 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4129 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4130 4131 // release packet buffer for synchronous transport implementations 4132 if (hci_transport_synchronous()){ 4133 hci_release_packet_buffer(); 4134 hci_emit_transport_packet_sent(); 4135 } 4136 } 4137 #endif 4138 4139 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4140 UNUSED(ds); 4141 hci_stack->substate = HCI_HALTING_CLOSE; 4142 // allow packet handlers to defer final shutdown 4143 hci_emit_state(); 4144 hci_run(); 4145 } 4146 4147 static bool hci_run_acl_fragments(void){ 4148 if (hci_stack->acl_fragmentation_total_size > 0u) { 4149 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4150 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4151 if (connection) { 4152 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4153 hci_send_acl_packet_fragments(connection); 4154 return true; 4155 } 4156 } else { 4157 // connection gone -> discard further fragments 4158 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4159 hci_stack->acl_fragmentation_total_size = 0; 4160 hci_stack->acl_fragmentation_pos = 0; 4161 } 4162 } 4163 return false; 4164 } 4165 4166 #ifdef ENABLE_CLASSIC 4167 static bool hci_run_general_gap_classic(void){ 4168 4169 // assert stack is working and classic is active 4170 if (hci_classic_supported() == false) return false; 4171 if (hci_stack->state != HCI_STATE_WORKING) return false; 4172 4173 // decline incoming connections 4174 if (hci_stack->decline_reason){ 4175 uint8_t reason = hci_stack->decline_reason; 4176 hci_stack->decline_reason = 0; 4177 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4178 return true; 4179 } 4180 4181 if (hci_stack->gap_tasks != 0){ 4182 hci_run_gap_tasks_classic(); 4183 return true; 4184 } 4185 4186 // start/stop inquiry 4187 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4188 uint8_t duration = hci_stack->inquiry_state; 4189 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4190 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4191 return true; 4192 } 4193 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4194 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4195 hci_send_cmd(&hci_inquiry_cancel); 4196 return true; 4197 } 4198 // remote name request 4199 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4200 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4201 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4202 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4203 return true; 4204 } 4205 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4206 // Local OOB data 4207 if (hci_stack->classic_read_local_oob_data){ 4208 hci_stack->classic_read_local_oob_data = false; 4209 if (hci_stack->local_supported_commands[1] & 0x10u){ 4210 hci_send_cmd(&hci_read_local_extended_oob_data); 4211 } else { 4212 hci_send_cmd(&hci_read_local_oob_data); 4213 } 4214 } 4215 #endif 4216 // pairing 4217 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4218 uint8_t state = hci_stack->gap_pairing_state; 4219 uint8_t pin_code[16]; 4220 switch (state){ 4221 case GAP_PAIRING_STATE_SEND_PIN: 4222 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4223 memset(pin_code, 0, 16); 4224 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4225 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4226 break; 4227 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4228 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4229 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4230 break; 4231 case GAP_PAIRING_STATE_SEND_PASSKEY: 4232 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4233 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4234 break; 4235 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4236 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4237 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4238 break; 4239 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4240 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4241 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4242 break; 4243 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4244 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4245 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4246 break; 4247 default: 4248 break; 4249 } 4250 return true; 4251 } 4252 return false; 4253 } 4254 #endif 4255 4256 #ifdef ENABLE_BLE 4257 static bool hci_run_general_gap_le(void){ 4258 4259 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4260 4261 if (hci_stack->state != HCI_STATE_WORKING) return false; 4262 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4263 4264 4265 // Phase 1: collect what to stop 4266 4267 bool scanning_stop = false; 4268 bool connecting_stop = false; 4269 bool advertising_stop = false; 4270 4271 #ifndef ENABLE_LE_CENTRAL 4272 UNUSED(scanning_stop); 4273 UNUSED(connecting_stop); 4274 #endif 4275 #ifndef ENABLE_LE_PERIPHERAL 4276 UNUSED(advertising_stop); 4277 #endif 4278 4279 // check if whitelist needs modification 4280 bool whitelist_modification_pending = false; 4281 btstack_linked_list_iterator_t lit; 4282 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4283 while (btstack_linked_list_iterator_has_next(&lit)){ 4284 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4285 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4286 whitelist_modification_pending = true; 4287 break; 4288 } 4289 } 4290 // check if resolving list needs modification 4291 bool resolving_list_modification_pending = false; 4292 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4293 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4294 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4295 resolving_list_modification_pending = true; 4296 } 4297 #endif 4298 4299 #ifdef ENABLE_LE_CENTRAL 4300 // scanning control 4301 if (hci_stack->le_scanning_active) { 4302 // stop if: 4303 // - parameter change required 4304 // - it's disabled 4305 // - whitelist change required but used for scanning 4306 // - resolving list modified 4307 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4308 if ((hci_stack->le_scanning_param_update) || 4309 !hci_stack->le_scanning_enabled || 4310 scanning_uses_whitelist || 4311 resolving_list_modification_pending){ 4312 4313 scanning_stop = true; 4314 } 4315 } 4316 #endif 4317 4318 #ifdef ENABLE_LE_CENTRAL 4319 // connecting control 4320 bool connecting_with_whitelist; 4321 switch (hci_stack->le_connecting_state){ 4322 case LE_CONNECTING_DIRECT: 4323 case LE_CONNECTING_WHITELIST: 4324 // stop connecting if: 4325 // - connecting uses white and whitelist modification pending 4326 // - if it got disabled 4327 // - resolving list modified 4328 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4329 if ((connecting_with_whitelist && whitelist_modification_pending) || 4330 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4331 resolving_list_modification_pending) { 4332 4333 connecting_stop = true; 4334 } 4335 break; 4336 default: 4337 break; 4338 } 4339 #endif 4340 4341 #ifdef ENABLE_LE_PERIPHERAL 4342 // le advertisement control 4343 if (hci_stack->le_advertisements_active){ 4344 // stop if: 4345 // - parameter change required 4346 // - it's disabled 4347 // - whitelist change required but used for advertisement filter policy 4348 // - resolving list modified 4349 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4350 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4351 if (advertising_change || 4352 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4353 (advertising_uses_whitelist & whitelist_modification_pending) || 4354 resolving_list_modification_pending) { 4355 4356 advertising_stop = true; 4357 } 4358 } 4359 #endif 4360 4361 4362 // Phase 2: stop everything that should be off during modifications 4363 4364 #ifdef ENABLE_LE_CENTRAL 4365 if (scanning_stop){ 4366 hci_stack->le_scanning_active = false; 4367 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4368 return true; 4369 } 4370 #endif 4371 4372 #ifdef ENABLE_LE_CENTRAL 4373 if (connecting_stop){ 4374 hci_send_cmd(&hci_le_create_connection_cancel); 4375 return true; 4376 } 4377 #endif 4378 4379 #ifdef ENABLE_LE_PERIPHERAL 4380 if (advertising_stop){ 4381 hci_stack->le_advertisements_active = false; 4382 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4383 return true; 4384 } 4385 #endif 4386 4387 // Phase 3: modify 4388 4389 #ifdef ENABLE_LE_CENTRAL 4390 if (hci_stack->le_scanning_param_update){ 4391 hci_stack->le_scanning_param_update = false; 4392 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4393 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4394 return true; 4395 } 4396 #endif 4397 4398 #ifdef ENABLE_LE_PERIPHERAL 4399 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4400 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4401 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4402 hci_send_cmd(&hci_le_set_advertising_parameters, 4403 hci_stack->le_advertisements_interval_min, 4404 hci_stack->le_advertisements_interval_max, 4405 hci_stack->le_advertisements_type, 4406 hci_stack->le_advertisements_own_addr_type, 4407 hci_stack->le_advertisements_direct_address_type, 4408 hci_stack->le_advertisements_direct_address, 4409 hci_stack->le_advertisements_channel_map, 4410 hci_stack->le_advertisements_filter_policy); 4411 return true; 4412 } 4413 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4414 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4415 uint8_t adv_data_clean[31]; 4416 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4417 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4418 hci_stack->le_advertisements_data_len); 4419 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4420 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4421 return true; 4422 } 4423 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4424 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4425 uint8_t scan_data_clean[31]; 4426 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4427 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4428 hci_stack->le_scan_response_data_len); 4429 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4430 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4431 return true; 4432 } 4433 #endif 4434 4435 4436 #ifdef ENABLE_LE_CENTRAL 4437 // if connect with whitelist was active and is not cancelled yet, wait until next time 4438 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4439 #endif 4440 4441 // LE Whitelist Management 4442 if (whitelist_modification_pending){ 4443 // add/remove entries 4444 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4445 while (btstack_linked_list_iterator_has_next(&lit)){ 4446 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4447 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4448 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4449 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4450 return true; 4451 } 4452 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4453 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4454 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4455 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4456 return true; 4457 } 4458 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4459 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4460 btstack_memory_whitelist_entry_free(entry); 4461 } 4462 } 4463 } 4464 4465 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4466 // LE Resolving List Management 4467 if (resolving_list_supported) { 4468 uint16_t i; 4469 switch (hci_stack->le_resolving_list_state) { 4470 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4471 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4472 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4473 return true; 4474 case LE_RESOLVING_LIST_READ_SIZE: 4475 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4476 hci_send_cmd(&hci_le_read_resolving_list_size); 4477 return true; 4478 case LE_RESOLVING_LIST_SEND_CLEAR: 4479 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4480 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4481 sizeof(hci_stack->le_resolving_list_add_entries)); 4482 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4483 sizeof(hci_stack->le_resolving_list_remove_entries)); 4484 hci_send_cmd(&hci_le_clear_resolving_list); 4485 return true; 4486 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4487 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4488 uint8_t offset = i >> 3; 4489 uint8_t mask = 1 << (i & 7); 4490 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4491 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4492 bd_addr_t peer_identity_addreses; 4493 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4494 sm_key_t peer_irk; 4495 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4496 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4497 4498 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4499 // trigger whitelist entry 'update' (work around for controller bug) 4500 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4501 while (btstack_linked_list_iterator_has_next(&lit)) { 4502 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4503 if (entry->address_type != peer_identity_addr_type) continue; 4504 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4505 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4506 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4507 } 4508 #endif 4509 4510 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4511 peer_identity_addreses); 4512 return true; 4513 } 4514 4515 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4516 4517 /* fall through */ 4518 4519 case LE_RESOLVING_LIST_ADD_ENTRIES: 4520 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4521 uint8_t offset = i >> 3; 4522 uint8_t mask = 1 << (i & 7); 4523 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4524 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4525 bd_addr_t peer_identity_addreses; 4526 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4527 sm_key_t peer_irk; 4528 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4529 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4530 const uint8_t *local_irk = gap_get_persistent_irk(); 4531 // command uses format specifier 'P' that stores 16-byte value without flip 4532 uint8_t local_irk_flipped[16]; 4533 uint8_t peer_irk_flipped[16]; 4534 reverse_128(local_irk, local_irk_flipped); 4535 reverse_128(peer_irk, peer_irk_flipped); 4536 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4537 peer_irk_flipped, local_irk_flipped); 4538 return true; 4539 } 4540 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4541 break; 4542 4543 default: 4544 break; 4545 } 4546 } 4547 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4548 #endif 4549 4550 // Phase 4: restore state 4551 4552 #ifdef ENABLE_LE_CENTRAL 4553 // re-start scanning 4554 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4555 hci_stack->le_scanning_active = true; 4556 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4557 return true; 4558 } 4559 #endif 4560 4561 #ifdef ENABLE_LE_CENTRAL 4562 // re-start connecting 4563 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4564 bd_addr_t null_addr; 4565 memset(null_addr, 0, 6); 4566 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4567 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4568 hci_send_cmd(&hci_le_create_connection, 4569 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4570 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4571 1, // use whitelist 4572 0, // peer address type 4573 null_addr, // peer bd addr 4574 hci_stack->le_connection_own_addr_type, // our addr type: 4575 hci_stack->le_connection_interval_min, // conn interval min 4576 hci_stack->le_connection_interval_max, // conn interval max 4577 hci_stack->le_connection_latency, // conn latency 4578 hci_stack->le_supervision_timeout, // conn latency 4579 hci_stack->le_minimum_ce_length, // min ce length 4580 hci_stack->le_maximum_ce_length // max ce length 4581 ); 4582 return true; 4583 } 4584 #endif 4585 4586 #ifdef ENABLE_LE_PERIPHERAL 4587 // re-start advertising 4588 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4589 // check if advertisements should be enabled given 4590 hci_stack->le_advertisements_active = true; 4591 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4592 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4593 return true; 4594 } 4595 #endif 4596 4597 return false; 4598 } 4599 #endif 4600 4601 static bool hci_run_general_pending_commands(void){ 4602 btstack_linked_item_t * it; 4603 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4604 hci_connection_t * connection = (hci_connection_t *) it; 4605 4606 switch(connection->state){ 4607 case SEND_CREATE_CONNECTION: 4608 switch(connection->address_type){ 4609 #ifdef ENABLE_CLASSIC 4610 case BD_ADDR_TYPE_ACL: 4611 log_info("sending hci_create_connection"); 4612 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4613 break; 4614 #endif 4615 default: 4616 #ifdef ENABLE_BLE 4617 #ifdef ENABLE_LE_CENTRAL 4618 log_info("sending hci_le_create_connection"); 4619 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4620 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4621 hci_send_cmd(&hci_le_create_connection, 4622 hci_stack->le_connection_scan_interval, // conn scan interval 4623 hci_stack->le_connection_scan_window, // conn scan windows 4624 0, // don't use whitelist 4625 connection->address_type, // peer address type 4626 connection->address, // peer bd addr 4627 hci_stack->le_connection_own_addr_type, // our addr type: 4628 hci_stack->le_connection_interval_min, // conn interval min 4629 hci_stack->le_connection_interval_max, // conn interval max 4630 hci_stack->le_connection_latency, // conn latency 4631 hci_stack->le_supervision_timeout, // conn latency 4632 hci_stack->le_minimum_ce_length, // min ce length 4633 hci_stack->le_maximum_ce_length // max ce length 4634 ); 4635 connection->state = SENT_CREATE_CONNECTION; 4636 #endif 4637 #endif 4638 break; 4639 } 4640 return true; 4641 4642 #ifdef ENABLE_CLASSIC 4643 case RECEIVED_CONNECTION_REQUEST: 4644 connection->role = HCI_ROLE_SLAVE; 4645 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4646 log_info("sending hci_accept_connection_request"); 4647 connection->state = ACCEPTED_CONNECTION_REQUEST; 4648 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4649 } 4650 return true; 4651 #endif 4652 4653 #ifdef ENABLE_BLE 4654 #ifdef ENABLE_LE_CENTRAL 4655 case SEND_CANCEL_CONNECTION: 4656 connection->state = SENT_CANCEL_CONNECTION; 4657 hci_send_cmd(&hci_le_create_connection_cancel); 4658 return true; 4659 #endif 4660 #endif 4661 case SEND_DISCONNECT: 4662 connection->state = SENT_DISCONNECT; 4663 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4664 return true; 4665 4666 default: 4667 break; 4668 } 4669 4670 // no further commands if connection is about to get shut down 4671 if (connection->state == SENT_DISCONNECT) continue; 4672 4673 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4674 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4675 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4676 return true; 4677 } 4678 4679 #ifdef ENABLE_CLASSIC 4680 4681 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4682 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4683 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4684 return true; 4685 } 4686 4687 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4688 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4689 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4690 return true; 4691 } 4692 4693 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4694 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4695 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4696 return true; 4697 } 4698 4699 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4700 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4701 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4702 return true; 4703 } 4704 4705 // Handling link key request requires remote supported features 4706 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4707 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4708 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4709 4710 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4711 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4712 if (have_link_key && security_level_sufficient){ 4713 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4714 } else { 4715 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4716 } 4717 return true; 4718 } 4719 4720 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4721 log_info("denying to pin request"); 4722 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4723 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4724 return true; 4725 } 4726 4727 // security assessment requires remote features 4728 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4729 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4730 hci_ssp_assess_security_on_io_cap_request(connection); 4731 // 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 4732 } 4733 4734 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4735 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4736 // set authentication requirements: 4737 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4738 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4739 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4740 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4741 authreq |= 1; 4742 } 4743 bool bonding = hci_stack->bondable; 4744 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4745 // if we have received IO Cap Response, we're in responder role 4746 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4747 if (bonding && !remote_bonding){ 4748 log_info("Remote not bonding, dropping local flag"); 4749 bonding = false; 4750 } 4751 } 4752 if (bonding){ 4753 if (connection->bonding_flags & BONDING_DEDICATED){ 4754 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4755 } else { 4756 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4757 } 4758 } 4759 uint8_t have_oob_data = 0; 4760 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4761 if (connection->classic_oob_c_192 != NULL){ 4762 have_oob_data |= 1; 4763 } 4764 if (connection->classic_oob_c_256 != NULL){ 4765 have_oob_data |= 2; 4766 } 4767 #endif 4768 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4769 return true; 4770 } 4771 4772 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4773 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4774 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4775 return true; 4776 } 4777 4778 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4779 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4780 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4781 const uint8_t zero[16] = { 0 }; 4782 const uint8_t * r_192 = zero; 4783 const uint8_t * c_192 = zero; 4784 const uint8_t * r_256 = zero; 4785 const uint8_t * c_256 = zero; 4786 // verify P-256 OOB 4787 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4788 c_256 = connection->classic_oob_c_256; 4789 if (connection->classic_oob_r_256 != NULL) { 4790 r_256 = connection->classic_oob_r_256; 4791 } 4792 } 4793 // verify P-192 OOB 4794 if ((connection->classic_oob_c_192 != NULL)) { 4795 c_192 = connection->classic_oob_c_192; 4796 if (connection->classic_oob_r_192 != NULL) { 4797 r_192 = connection->classic_oob_r_192; 4798 } 4799 } 4800 4801 // assess security 4802 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4803 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4804 if (need_level_4 && !can_reach_level_4){ 4805 log_info("Level 4 required, but not possible -> abort"); 4806 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4807 // send oob negative reply 4808 c_256 = NULL; 4809 c_192 = NULL; 4810 } 4811 4812 // Reply 4813 if (c_256 != zero) { 4814 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4815 } else if (c_192 != zero){ 4816 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4817 } else { 4818 hci_stack->classic_oob_con_handle = connection->con_handle; 4819 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4820 } 4821 return true; 4822 } 4823 #endif 4824 4825 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4826 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4827 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4828 return true; 4829 } 4830 4831 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4832 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4833 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4834 return true; 4835 } 4836 4837 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4838 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4839 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4840 return true; 4841 } 4842 4843 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4844 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4845 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4846 connection->state = SENT_DISCONNECT; 4847 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4848 return true; 4849 } 4850 4851 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4852 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4853 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4854 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4855 return true; 4856 } 4857 4858 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4859 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4860 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4861 return true; 4862 } 4863 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4864 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4865 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4866 return true; 4867 } 4868 #endif 4869 4870 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4871 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4872 #ifdef ENABLE_CLASSIC 4873 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4874 #endif 4875 if (connection->state != SENT_DISCONNECT){ 4876 connection->state = SENT_DISCONNECT; 4877 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4878 return true; 4879 } 4880 } 4881 4882 #ifdef ENABLE_CLASSIC 4883 uint16_t sniff_min_interval; 4884 switch (connection->sniff_min_interval){ 4885 case 0: 4886 break; 4887 case 0xffff: 4888 connection->sniff_min_interval = 0; 4889 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4890 return true; 4891 default: 4892 sniff_min_interval = connection->sniff_min_interval; 4893 connection->sniff_min_interval = 0; 4894 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4895 return true; 4896 } 4897 4898 if (connection->sniff_subrating_max_latency != 0xffff){ 4899 uint16_t max_latency = connection->sniff_subrating_max_latency; 4900 connection->sniff_subrating_max_latency = 0; 4901 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4902 return true; 4903 } 4904 4905 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4906 uint8_t service_type = (uint8_t) connection->qos_service_type; 4907 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4908 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); 4909 return true; 4910 } 4911 4912 if (connection->request_role != HCI_ROLE_INVALID){ 4913 hci_role_t role = connection->request_role; 4914 connection->request_role = HCI_ROLE_INVALID; 4915 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4916 return true; 4917 } 4918 #endif 4919 4920 #ifdef ENABLE_BLE 4921 switch (connection->le_con_parameter_update_state){ 4922 // response to L2CAP CON PARAMETER UPDATE REQUEST 4923 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4924 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4925 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4926 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4927 0x0000, 0xffff); 4928 return true; 4929 case CON_PARAMETER_UPDATE_REPLY: 4930 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4931 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4932 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4933 0x0000, 0xffff); 4934 return true; 4935 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4936 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4937 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4938 return true; 4939 default: 4940 break; 4941 } 4942 if (connection->le_phy_update_all_phys != 0xffu){ 4943 uint8_t all_phys = connection->le_phy_update_all_phys; 4944 connection->le_phy_update_all_phys = 0xff; 4945 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); 4946 return true; 4947 } 4948 #endif 4949 } 4950 return false; 4951 } 4952 4953 static void hci_run(void){ 4954 4955 bool done; 4956 4957 // send continuation fragments first, as they block the prepared packet buffer 4958 done = hci_run_acl_fragments(); 4959 if (done) return; 4960 4961 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4962 // send host num completed packets next as they don't require num_cmd_packets > 0 4963 if (!hci_can_send_comand_packet_transport()) return; 4964 if (hci_stack->host_completed_packets){ 4965 hci_host_num_completed_packets(); 4966 return; 4967 } 4968 #endif 4969 4970 if (!hci_can_send_command_packet_now()) return; 4971 4972 // global/non-connection oriented commands 4973 4974 4975 #ifdef ENABLE_CLASSIC 4976 // general gap classic 4977 done = hci_run_general_gap_classic(); 4978 if (done) return; 4979 #endif 4980 4981 #ifdef ENABLE_BLE 4982 // general gap le 4983 done = hci_run_general_gap_le(); 4984 if (done) return; 4985 #endif 4986 4987 // send pending HCI commands 4988 done = hci_run_general_pending_commands(); 4989 if (done) return; 4990 4991 // stack state sub statemachines 4992 hci_connection_t * connection; 4993 switch (hci_stack->state){ 4994 case HCI_STATE_INITIALIZING: 4995 hci_initializing_run(); 4996 break; 4997 4998 case HCI_STATE_HALTING: 4999 5000 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5001 switch (hci_stack->substate){ 5002 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5003 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5004 5005 #ifdef ENABLE_BLE 5006 #ifdef ENABLE_LE_CENTRAL 5007 // free whitelist entries 5008 { 5009 btstack_linked_list_iterator_t lit; 5010 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5011 while (btstack_linked_list_iterator_has_next(&lit)){ 5012 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5013 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5014 btstack_memory_whitelist_entry_free(entry); 5015 } 5016 } 5017 #endif 5018 #endif 5019 // close all open connections 5020 connection = (hci_connection_t *) hci_stack->connections; 5021 if (connection){ 5022 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5023 if (!hci_can_send_command_packet_now()) return; 5024 5025 // check state 5026 if (connection->state == SENT_DISCONNECT) return; 5027 connection->state = SENT_DISCONNECT; 5028 5029 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5030 5031 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5032 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5033 5034 // ... which would be ignored anyway as we shutdown (free) the connection now 5035 hci_shutdown_connection(connection); 5036 5037 // finally, send the disconnect command 5038 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5039 return; 5040 } 5041 5042 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5043 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5044 log_info("HCI_STATE_HALTING: wait 50 ms"); 5045 hci_stack->substate = HCI_HALTING_W4_TIMER; 5046 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5047 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5048 btstack_run_loop_add_timer(&hci_stack->timeout); 5049 break; 5050 } 5051 5052 /* fall through */ 5053 5054 case HCI_HALTING_CLOSE: 5055 log_info("HCI_STATE_HALTING, calling off"); 5056 5057 // switch mode 5058 hci_power_control_off(); 5059 5060 log_info("HCI_STATE_HALTING, emitting state"); 5061 hci_emit_state(); 5062 log_info("HCI_STATE_HALTING, done"); 5063 break; 5064 5065 case HCI_HALTING_W4_TIMER: 5066 // keep waiting 5067 5068 break; 5069 default: 5070 break; 5071 } 5072 5073 break; 5074 5075 case HCI_STATE_FALLING_ASLEEP: 5076 switch(hci_stack->substate) { 5077 case HCI_FALLING_ASLEEP_DISCONNECT: 5078 log_info("HCI_STATE_FALLING_ASLEEP"); 5079 // close all open connections 5080 connection = (hci_connection_t *) hci_stack->connections; 5081 if (connection){ 5082 5083 // send disconnect 5084 if (!hci_can_send_command_packet_now()) return; 5085 5086 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5087 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5088 5089 // send disconnected event right away - causes higher layer connections to get closed, too. 5090 hci_shutdown_connection(connection); 5091 return; 5092 } 5093 5094 if (hci_classic_supported()){ 5095 // disable page and inquiry scan 5096 if (!hci_can_send_command_packet_now()) return; 5097 5098 log_info("HCI_STATE_HALTING, disabling inq scans"); 5099 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5100 5101 // continue in next sub state 5102 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5103 break; 5104 } 5105 5106 /* fall through */ 5107 5108 case HCI_FALLING_ASLEEP_COMPLETE: 5109 log_info("HCI_STATE_HALTING, calling sleep"); 5110 // switch mode 5111 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5112 hci_emit_state(); 5113 break; 5114 5115 default: 5116 break; 5117 } 5118 break; 5119 5120 default: 5121 break; 5122 } 5123 } 5124 5125 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5126 // house-keeping 5127 5128 #ifdef ENABLE_CLASSIC 5129 bd_addr_t addr; 5130 hci_connection_t * conn; 5131 #endif 5132 #ifdef ENABLE_LE_CENTRAL 5133 uint8_t initiator_filter_policy; 5134 #endif 5135 5136 uint16_t opcode = little_endian_read_16(packet, 0); 5137 switch (opcode) { 5138 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5139 hci_stack->loopback_mode = packet[3]; 5140 break; 5141 5142 #ifdef ENABLE_CLASSIC 5143 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5144 reverse_bd_addr(&packet[3], addr); 5145 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5146 5147 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5148 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5149 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5150 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5151 } 5152 5153 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5154 if (!conn) { 5155 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5156 if (!conn) { 5157 // notify client that alloc failed 5158 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5159 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5160 } 5161 conn->state = SEND_CREATE_CONNECTION; 5162 conn->role = HCI_ROLE_MASTER; 5163 } 5164 5165 conn->con_handle = HCI_CON_HANDLE_INVALID; 5166 conn->role = HCI_ROLE_INVALID; 5167 5168 log_info("conn state %u", conn->state); 5169 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5170 switch (conn->state) { 5171 // if connection active exists 5172 case OPEN: 5173 // and OPEN, emit connection complete command 5174 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5175 // packet not sent to controller 5176 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5177 case RECEIVED_DISCONNECTION_COMPLETE: 5178 // create connection triggered in disconnect complete event, let's do it now 5179 break; 5180 case SEND_CREATE_CONNECTION: 5181 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5182 break; 5183 default: 5184 // otherwise, just ignore as it is already in the open process 5185 // packet not sent to controller 5186 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5187 } 5188 conn->state = SENT_CREATE_CONNECTION; 5189 5190 // track outgoing connection 5191 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5192 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5193 break; 5194 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5195 if (hci_stack->link_key_db) { 5196 reverse_bd_addr(&packet[3], addr); 5197 hci_stack->link_key_db->delete_link_key(addr); 5198 } 5199 break; 5200 5201 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5202 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5203 // setup_synchronous_connection? Voice setting at offset 22 5204 // TODO: compare to current setting if sco connection already active 5205 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5206 break; 5207 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5208 // accept_synchronus_connection? Voice setting at offset 18 5209 // TODO: compare to current setting if sco connection already active 5210 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5211 break; 5212 #endif 5213 #endif 5214 5215 #ifdef ENABLE_BLE 5216 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5217 hci_stack->le_random_address_set = 1; 5218 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5219 break; 5220 #ifdef ENABLE_LE_PERIPHERAL 5221 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5222 hci_stack->le_advertisements_active = packet[3] != 0; 5223 break; 5224 #endif 5225 #ifdef ENABLE_LE_CENTRAL 5226 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5227 // white list used? 5228 initiator_filter_policy = packet[7]; 5229 switch (initiator_filter_policy) { 5230 case 0: 5231 // whitelist not used 5232 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5233 break; 5234 case 1: 5235 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5236 break; 5237 default: 5238 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5239 break; 5240 } 5241 // track outgoing connection 5242 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5243 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5244 break; 5245 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5246 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5247 break; 5248 #endif 5249 #endif 5250 default: 5251 break; 5252 } 5253 5254 hci_stack->num_cmd_packets--; 5255 5256 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5257 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5258 if (err != 0){ 5259 return ERROR_CODE_HARDWARE_FAILURE; 5260 } 5261 return ERROR_CODE_SUCCESS; 5262 } 5263 5264 // disconnect because of security block 5265 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5266 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5267 if (!connection) return; 5268 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5269 } 5270 5271 5272 // Configure Secure Simple Pairing 5273 5274 #ifdef ENABLE_CLASSIC 5275 5276 // enable will enable SSP during init 5277 void gap_ssp_set_enable(int enable){ 5278 hci_stack->ssp_enable = enable; 5279 } 5280 5281 static int hci_local_ssp_activated(void){ 5282 return gap_ssp_supported() && hci_stack->ssp_enable; 5283 } 5284 5285 // if set, BTstack will respond to io capability request using authentication requirement 5286 void gap_ssp_set_io_capability(int io_capability){ 5287 hci_stack->ssp_io_capability = io_capability; 5288 } 5289 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5290 hci_stack->ssp_authentication_requirement = authentication_requirement; 5291 } 5292 5293 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5294 void gap_ssp_set_auto_accept(int auto_accept){ 5295 hci_stack->ssp_auto_accept = auto_accept; 5296 } 5297 5298 void gap_secure_connections_enable(bool enable){ 5299 hci_stack->secure_connections_enable = enable; 5300 } 5301 5302 #endif 5303 5304 // va_list part of hci_send_cmd 5305 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5306 if (!hci_can_send_command_packet_now()){ 5307 log_error("hci_send_cmd called but cannot send packet now"); 5308 return ERROR_CODE_COMMAND_DISALLOWED; 5309 } 5310 5311 // for HCI INITIALIZATION 5312 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5313 hci_stack->last_cmd_opcode = cmd->opcode; 5314 5315 hci_reserve_packet_buffer(); 5316 uint8_t * packet = hci_stack->hci_packet_buffer; 5317 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5318 uint8_t status = hci_send_cmd_packet(packet, size); 5319 5320 // release packet buffer on error or for synchronous transport implementations 5321 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5322 hci_release_packet_buffer(); 5323 hci_emit_transport_packet_sent(); 5324 } 5325 5326 return status; 5327 } 5328 5329 /** 5330 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5331 */ 5332 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5333 va_list argptr; 5334 va_start(argptr, cmd); 5335 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5336 va_end(argptr); 5337 return status; 5338 } 5339 5340 // Create various non-HCI events. 5341 // TODO: generalize, use table similar to hci_create_command 5342 5343 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5344 // dump packet 5345 if (dump) { 5346 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5347 } 5348 5349 // dispatch to all event handlers 5350 btstack_linked_list_iterator_t it; 5351 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5352 while (btstack_linked_list_iterator_has_next(&it)){ 5353 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5354 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5355 } 5356 } 5357 5358 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5359 if (!hci_stack->acl_packet_handler) return; 5360 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5361 } 5362 5363 #ifdef ENABLE_CLASSIC 5364 static void hci_notify_if_sco_can_send_now(void){ 5365 // notify SCO sender if waiting 5366 if (!hci_stack->sco_waiting_for_can_send_now) return; 5367 if (hci_can_send_sco_packet_now()){ 5368 hci_stack->sco_waiting_for_can_send_now = 0; 5369 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5370 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5371 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5372 } 5373 } 5374 5375 // parsing end emitting has been merged to reduce code size 5376 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5377 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5378 5379 uint8_t * eir_data; 5380 ad_context_t context; 5381 const uint8_t * name; 5382 uint8_t name_len; 5383 5384 if (size < 3) return; 5385 5386 int event_type = hci_event_packet_get_type(packet); 5387 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5388 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5389 5390 switch (event_type){ 5391 case HCI_EVENT_INQUIRY_RESULT: 5392 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5393 if (size != (3 + (num_responses * 14))) return; 5394 break; 5395 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5396 if (size != 257) return; 5397 if (num_responses != 1) return; 5398 break; 5399 default: 5400 return; 5401 } 5402 5403 // event[1] is set at the end 5404 int i; 5405 for (i=0; i<num_responses;i++){ 5406 memset(event, 0, sizeof(event)); 5407 event[0] = GAP_EVENT_INQUIRY_RESULT; 5408 uint8_t event_size = 27; // if name is not set by EIR 5409 5410 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5411 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5412 (void)memcpy(&event[9], 5413 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5414 3); // class of device 5415 (void)memcpy(&event[12], 5416 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5417 2); // clock offset 5418 5419 switch (event_type){ 5420 case HCI_EVENT_INQUIRY_RESULT: 5421 // 14,15,16,17 = 0, size 18 5422 break; 5423 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5424 event[14] = 1; 5425 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5426 // 16,17 = 0, size 18 5427 break; 5428 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5429 event[14] = 1; 5430 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5431 // EIR packets only contain a single inquiry response 5432 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5433 name = NULL; 5434 // Iterate over EIR data 5435 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5436 uint8_t data_type = ad_iterator_get_data_type(&context); 5437 uint8_t data_size = ad_iterator_get_data_len(&context); 5438 const uint8_t * data = ad_iterator_get_data(&context); 5439 // Prefer Complete Local Name over Shortened Local Name 5440 switch (data_type){ 5441 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5442 if (name) continue; 5443 /* fall through */ 5444 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5445 name = data; 5446 name_len = data_size; 5447 break; 5448 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5449 if (data_size != 8) break; 5450 event[16] = 1; 5451 memcpy(&event[17], data, 8); 5452 break; 5453 default: 5454 break; 5455 } 5456 } 5457 if (name){ 5458 event[25] = 1; 5459 // truncate name if needed 5460 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5461 event[26] = len; 5462 (void)memcpy(&event[27], name, len); 5463 event_size += len; 5464 } 5465 break; 5466 default: 5467 return; 5468 } 5469 event[1] = event_size - 2; 5470 hci_emit_event(event, event_size, 1); 5471 } 5472 } 5473 #endif 5474 5475 void hci_emit_state(void){ 5476 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5477 uint8_t event[3]; 5478 event[0] = BTSTACK_EVENT_STATE; 5479 event[1] = sizeof(event) - 2u; 5480 event[2] = hci_stack->state; 5481 hci_emit_event(event, sizeof(event), 1); 5482 } 5483 5484 #ifdef ENABLE_CLASSIC 5485 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5486 uint8_t event[13]; 5487 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5488 event[1] = sizeof(event) - 2; 5489 event[2] = status; 5490 little_endian_store_16(event, 3, con_handle); 5491 reverse_bd_addr(address, &event[5]); 5492 event[11] = 1; // ACL connection 5493 event[12] = 0; // encryption disabled 5494 hci_emit_event(event, sizeof(event), 1); 5495 } 5496 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5497 if (disable_l2cap_timeouts) return; 5498 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5499 uint8_t event[4]; 5500 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5501 event[1] = sizeof(event) - 2; 5502 little_endian_store_16(event, 2, conn->con_handle); 5503 hci_emit_event(event, sizeof(event), 1); 5504 } 5505 #endif 5506 5507 #ifdef ENABLE_BLE 5508 #ifdef ENABLE_LE_CENTRAL 5509 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){ 5510 uint8_t event[21]; 5511 event[0] = HCI_EVENT_LE_META; 5512 event[1] = sizeof(event) - 2u; 5513 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5514 event[3] = status; 5515 little_endian_store_16(event, 4, con_handle); 5516 event[6] = 0; // TODO: role 5517 event[7] = address_type; 5518 reverse_bd_addr(address, &event[8]); 5519 little_endian_store_16(event, 14, 0); // interval 5520 little_endian_store_16(event, 16, 0); // latency 5521 little_endian_store_16(event, 18, 0); // supervision timeout 5522 event[20] = 0; // master clock accuracy 5523 hci_emit_event(event, sizeof(event), 1); 5524 } 5525 #endif 5526 #endif 5527 5528 static void hci_emit_transport_packet_sent(void){ 5529 // notify upper stack that it might be possible to send again 5530 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5531 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5532 } 5533 5534 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5535 uint8_t event[6]; 5536 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5537 event[1] = sizeof(event) - 2u; 5538 event[2] = 0; // status = OK 5539 little_endian_store_16(event, 3, con_handle); 5540 event[5] = reason; 5541 hci_emit_event(event, sizeof(event), 1); 5542 } 5543 5544 static void hci_emit_nr_connections_changed(void){ 5545 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5546 uint8_t event[3]; 5547 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5548 event[1] = sizeof(event) - 2u; 5549 event[2] = nr_hci_connections(); 5550 hci_emit_event(event, sizeof(event), 1); 5551 } 5552 5553 static void hci_emit_hci_open_failed(void){ 5554 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5555 uint8_t event[2]; 5556 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5557 event[1] = sizeof(event) - 2u; 5558 hci_emit_event(event, sizeof(event), 1); 5559 } 5560 5561 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5562 log_info("hci_emit_dedicated_bonding_result %u ", status); 5563 uint8_t event[9]; 5564 int pos = 0; 5565 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5566 event[pos++] = sizeof(event) - 2u; 5567 event[pos++] = status; 5568 reverse_bd_addr(address, &event[pos]); 5569 hci_emit_event(event, sizeof(event), 1); 5570 } 5571 5572 5573 #ifdef ENABLE_CLASSIC 5574 5575 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5576 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5577 uint8_t event[5]; 5578 int pos = 0; 5579 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5580 event[pos++] = sizeof(event) - 2; 5581 little_endian_store_16(event, 2, con_handle); 5582 pos += 2; 5583 event[pos++] = level; 5584 hci_emit_event(event, sizeof(event), 1); 5585 } 5586 5587 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5588 if (!connection) return LEVEL_0; 5589 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5590 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5591 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5592 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5593 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5594 // LEVEL 4 always requires 128 bit encrytion key size 5595 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5596 security_level = LEVEL_3; 5597 } 5598 return security_level; 5599 } 5600 5601 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5602 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5603 uint8_t event[3]; 5604 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5605 event[1] = sizeof(event) - 2; 5606 event[2] = enabled; 5607 hci_emit_event(event, sizeof(event), 1); 5608 } 5609 5610 // query if remote side supports eSCO 5611 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5612 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5613 if (!connection) return false; 5614 return (connection->remote_supported_features[0] & 1) != 0; 5615 } 5616 5617 static bool hci_ssp_supported(hci_connection_t * connection){ 5618 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5619 return (connection->bonding_flags & mask) == mask; 5620 } 5621 5622 // query if remote side supports SSP 5623 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5624 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5625 if (!connection) return false; 5626 return hci_ssp_supported(connection) ? 1 : 0; 5627 } 5628 5629 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5630 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5631 } 5632 5633 // GAP API 5634 /** 5635 * @bbrief enable/disable bonding. default is enabled 5636 * @praram enabled 5637 */ 5638 void gap_set_bondable_mode(int enable){ 5639 hci_stack->bondable = enable ? 1 : 0; 5640 } 5641 /** 5642 * @brief Get bondable mode. 5643 * @return 1 if bondable 5644 */ 5645 int gap_get_bondable_mode(void){ 5646 return hci_stack->bondable; 5647 } 5648 5649 /** 5650 * @brief map link keys to security levels 5651 */ 5652 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5653 switch (link_key_type){ 5654 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5655 return LEVEL_4; 5656 case COMBINATION_KEY: 5657 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5658 return LEVEL_3; 5659 default: 5660 return LEVEL_2; 5661 } 5662 } 5663 5664 /** 5665 * @brief map link keys to secure connection yes/no 5666 */ 5667 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5668 switch (link_key_type){ 5669 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5670 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5671 return 1; 5672 default: 5673 return 0; 5674 } 5675 } 5676 5677 /** 5678 * @brief map link keys to authenticated 5679 */ 5680 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5681 switch (link_key_type){ 5682 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5683 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5684 return 1; 5685 default: 5686 return 0; 5687 } 5688 } 5689 5690 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5691 log_info("gap_mitm_protection_required_for_security_level %u", level); 5692 return level > LEVEL_2; 5693 } 5694 5695 /** 5696 * @brief get current security level 5697 */ 5698 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5699 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5700 if (!connection) return LEVEL_0; 5701 return gap_security_level_for_connection(connection); 5702 } 5703 5704 /** 5705 * @brief request connection to device to 5706 * @result GAP_AUTHENTICATION_RESULT 5707 */ 5708 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5709 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5710 if (!connection){ 5711 hci_emit_security_level(con_handle, LEVEL_0); 5712 return; 5713 } 5714 5715 btstack_assert(hci_is_le_connection(connection) == false); 5716 5717 // 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) 5718 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5719 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5720 requested_level = LEVEL_4; 5721 } 5722 5723 gap_security_level_t current_level = gap_security_level(con_handle); 5724 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5725 requested_level, connection->requested_security_level, current_level); 5726 5727 // authentication active if authentication request was sent or planned level > 0 5728 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5729 if (authentication_active){ 5730 // authentication already active 5731 if (connection->requested_security_level < requested_level){ 5732 // increase requested level as new level is higher 5733 // TODO: handle re-authentication when done 5734 connection->requested_security_level = requested_level; 5735 } 5736 } else { 5737 // no request active, notify if security sufficient 5738 if (requested_level <= current_level){ 5739 hci_emit_security_level(con_handle, current_level); 5740 return; 5741 } 5742 5743 // store request 5744 connection->requested_security_level = requested_level; 5745 5746 // start to authenticate connection 5747 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5748 hci_run(); 5749 } 5750 } 5751 5752 /** 5753 * @brief start dedicated bonding with device. disconnect after bonding 5754 * @param device 5755 * @param request MITM protection 5756 * @result GAP_DEDICATED_BONDING_COMPLETE 5757 */ 5758 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5759 5760 // create connection state machine 5761 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5762 5763 if (!connection){ 5764 return BTSTACK_MEMORY_ALLOC_FAILED; 5765 } 5766 5767 // delete linkn key 5768 gap_drop_link_key_for_bd_addr(device); 5769 5770 // configure LEVEL_2/3, dedicated bonding 5771 connection->state = SEND_CREATE_CONNECTION; 5772 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5773 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5774 connection->bonding_flags = BONDING_DEDICATED; 5775 5776 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5777 5778 // handle: connnection failure (connection complete != ok) 5779 // handle: authentication failure 5780 // handle: disconnect on done 5781 5782 hci_run(); 5783 5784 return 0; 5785 } 5786 5787 void gap_set_local_name(const char * local_name){ 5788 hci_stack->local_name = local_name; 5789 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5790 // also update EIR if not set by user 5791 if (hci_stack->eir_data == NULL){ 5792 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5793 } 5794 hci_run(); 5795 } 5796 #endif 5797 5798 5799 #ifdef ENABLE_BLE 5800 5801 #ifdef ENABLE_LE_CENTRAL 5802 void gap_start_scan(void){ 5803 hci_stack->le_scanning_enabled = true; 5804 hci_run(); 5805 } 5806 5807 void gap_stop_scan(void){ 5808 hci_stack->le_scanning_enabled = false; 5809 hci_run(); 5810 } 5811 5812 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5813 hci_stack->le_scan_type = scan_type; 5814 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5815 hci_stack->le_scan_interval = scan_interval; 5816 hci_stack->le_scan_window = scan_window; 5817 hci_stack->le_scanning_param_update = true; 5818 hci_run(); 5819 } 5820 5821 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5822 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5823 } 5824 5825 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5826 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5827 if (!conn){ 5828 // disallow if le connection is already outgoing 5829 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5830 log_error("le connection already active"); 5831 return ERROR_CODE_COMMAND_DISALLOWED; 5832 } 5833 5834 log_info("gap_connect: no connection exists yet, creating context"); 5835 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5836 if (!conn){ 5837 // notify client that alloc failed 5838 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5839 log_info("gap_connect: failed to alloc hci_connection_t"); 5840 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5841 } 5842 5843 // set le connecting state 5844 if (hci_is_le_connection_type(addr_type)){ 5845 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5846 } 5847 5848 conn->state = SEND_CREATE_CONNECTION; 5849 log_info("gap_connect: send create connection next"); 5850 hci_run(); 5851 return ERROR_CODE_SUCCESS; 5852 } 5853 5854 if (!hci_is_le_connection(conn) || 5855 (conn->state == SEND_CREATE_CONNECTION) || 5856 (conn->state == SENT_CREATE_CONNECTION)) { 5857 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5858 log_error("gap_connect: classic connection or connect is already being created"); 5859 return GATT_CLIENT_IN_WRONG_STATE; 5860 } 5861 5862 // check if connection was just disconnected 5863 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5864 log_info("gap_connect: send create connection (again)"); 5865 conn->state = SEND_CREATE_CONNECTION; 5866 hci_run(); 5867 return ERROR_CODE_SUCCESS; 5868 } 5869 5870 log_info("gap_connect: context exists with state %u", conn->state); 5871 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5872 hci_run(); 5873 return ERROR_CODE_SUCCESS; 5874 } 5875 5876 // @assumption: only a single outgoing LE Connection exists 5877 static hci_connection_t * gap_get_outgoing_connection(void){ 5878 btstack_linked_item_t *it; 5879 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5880 hci_connection_t * conn = (hci_connection_t *) it; 5881 if (!hci_is_le_connection(conn)) continue; 5882 switch (conn->state){ 5883 case SEND_CREATE_CONNECTION: 5884 case SENT_CREATE_CONNECTION: 5885 case SENT_CANCEL_CONNECTION: 5886 return conn; 5887 default: 5888 break; 5889 }; 5890 } 5891 return NULL; 5892 } 5893 5894 uint8_t gap_connect_cancel(void){ 5895 hci_connection_t * conn = gap_get_outgoing_connection(); 5896 if (!conn) return 0; 5897 switch (conn->state){ 5898 case SEND_CREATE_CONNECTION: 5899 // skip sending create connection and emit event instead 5900 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5901 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5902 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5903 btstack_memory_hci_connection_free( conn ); 5904 break; 5905 case SENT_CREATE_CONNECTION: 5906 // request to send cancel connection 5907 conn->state = SEND_CANCEL_CONNECTION; 5908 hci_run(); 5909 break; 5910 default: 5911 break; 5912 } 5913 return 0; 5914 } 5915 #endif 5916 5917 #ifdef ENABLE_LE_CENTRAL 5918 /** 5919 * @brief Set connection parameters for outgoing connections 5920 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5921 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5922 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5923 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5924 * @param conn_latency, default: 4 5925 * @param supervision_timeout (unit: 10ms), default: 720 ms 5926 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5927 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5928 */ 5929 5930 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5931 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5932 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5933 hci_stack->le_connection_scan_interval = conn_scan_interval; 5934 hci_stack->le_connection_scan_window = conn_scan_window; 5935 hci_stack->le_connection_interval_min = conn_interval_min; 5936 hci_stack->le_connection_interval_max = conn_interval_max; 5937 hci_stack->le_connection_latency = conn_latency; 5938 hci_stack->le_supervision_timeout = supervision_timeout; 5939 hci_stack->le_minimum_ce_length = min_ce_length; 5940 hci_stack->le_maximum_ce_length = max_ce_length; 5941 } 5942 #endif 5943 5944 /** 5945 * @brief Updates the connection parameters for a given LE connection 5946 * @param handle 5947 * @param conn_interval_min (unit: 1.25ms) 5948 * @param conn_interval_max (unit: 1.25ms) 5949 * @param conn_latency 5950 * @param supervision_timeout (unit: 10ms) 5951 * @returns 0 if ok 5952 */ 5953 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5954 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5955 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5956 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5957 connection->le_conn_interval_min = conn_interval_min; 5958 connection->le_conn_interval_max = conn_interval_max; 5959 connection->le_conn_latency = conn_latency; 5960 connection->le_supervision_timeout = supervision_timeout; 5961 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5962 hci_run(); 5963 return 0; 5964 } 5965 5966 /** 5967 * @brief Request an update of the connection parameter for a given LE connection 5968 * @param handle 5969 * @param conn_interval_min (unit: 1.25ms) 5970 * @param conn_interval_max (unit: 1.25ms) 5971 * @param conn_latency 5972 * @param supervision_timeout (unit: 10ms) 5973 * @returns 0 if ok 5974 */ 5975 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5976 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5977 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5978 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5979 connection->le_conn_interval_min = conn_interval_min; 5980 connection->le_conn_interval_max = conn_interval_max; 5981 connection->le_conn_latency = conn_latency; 5982 connection->le_supervision_timeout = supervision_timeout; 5983 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5984 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5985 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5986 return 0; 5987 } 5988 5989 #ifdef ENABLE_LE_PERIPHERAL 5990 5991 /** 5992 * @brief Set Advertisement Data 5993 * @param advertising_data_length 5994 * @param advertising_data (max 31 octets) 5995 * @note data is not copied, pointer has to stay valid 5996 */ 5997 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5998 hci_stack->le_advertisements_data_len = advertising_data_length; 5999 hci_stack->le_advertisements_data = advertising_data; 6000 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6001 hci_run(); 6002 } 6003 6004 /** 6005 * @brief Set Scan Response Data 6006 * @param advertising_data_length 6007 * @param advertising_data (max 31 octets) 6008 * @note data is not copied, pointer has to stay valid 6009 */ 6010 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6011 hci_stack->le_scan_response_data_len = scan_response_data_length; 6012 hci_stack->le_scan_response_data = scan_response_data; 6013 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6014 hci_run(); 6015 } 6016 6017 /** 6018 * @brief Set Advertisement Parameters 6019 * @param adv_int_min 6020 * @param adv_int_max 6021 * @param adv_type 6022 * @param direct_address_type 6023 * @param direct_address 6024 * @param channel_map 6025 * @param filter_policy 6026 * 6027 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6028 */ 6029 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6030 uint8_t direct_address_typ, bd_addr_t direct_address, 6031 uint8_t channel_map, uint8_t filter_policy) { 6032 6033 hci_stack->le_advertisements_interval_min = adv_int_min; 6034 hci_stack->le_advertisements_interval_max = adv_int_max; 6035 hci_stack->le_advertisements_type = adv_type; 6036 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6037 hci_stack->le_advertisements_channel_map = channel_map; 6038 hci_stack->le_advertisements_filter_policy = filter_policy; 6039 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6040 6); 6041 6042 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6043 hci_run(); 6044 } 6045 6046 /** 6047 * @brief Enable/Disable Advertisements 6048 * @param enabled 6049 */ 6050 void gap_advertisements_enable(int enabled){ 6051 hci_stack->le_advertisements_enabled = enabled != 0; 6052 hci_update_advertisements_enabled_for_current_roles(); 6053 hci_run(); 6054 } 6055 6056 #endif 6057 6058 void hci_le_set_own_address_type(uint8_t own_address_type){ 6059 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6060 if (own_address_type == hci_stack->le_own_addr_type) return; 6061 hci_stack->le_own_addr_type = own_address_type; 6062 6063 #ifdef ENABLE_LE_PERIPHERAL 6064 // update advertisement parameters, too 6065 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6066 hci_run(); 6067 #endif 6068 #ifdef ENABLE_LE_CENTRAL 6069 // note: we don't update scan parameters or modify ongoing connection attempts 6070 #endif 6071 } 6072 6073 #endif 6074 6075 uint8_t gap_disconnect(hci_con_handle_t handle){ 6076 hci_connection_t * conn = hci_connection_for_handle(handle); 6077 if (!conn){ 6078 hci_emit_disconnection_complete(handle, 0); 6079 return 0; 6080 } 6081 // ignore if already disconnected 6082 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6083 return 0; 6084 } 6085 conn->state = SEND_DISCONNECT; 6086 hci_run(); 6087 return 0; 6088 } 6089 6090 int gap_read_rssi(hci_con_handle_t con_handle){ 6091 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6092 if (hci_connection == NULL) return 0; 6093 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6094 hci_run(); 6095 return 1; 6096 } 6097 6098 /** 6099 * @brief Get connection type 6100 * @param con_handle 6101 * @result connection_type 6102 */ 6103 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6104 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6105 if (!conn) return GAP_CONNECTION_INVALID; 6106 switch (conn->address_type){ 6107 case BD_ADDR_TYPE_LE_PUBLIC: 6108 case BD_ADDR_TYPE_LE_RANDOM: 6109 return GAP_CONNECTION_LE; 6110 case BD_ADDR_TYPE_SCO: 6111 return GAP_CONNECTION_SCO; 6112 case BD_ADDR_TYPE_ACL: 6113 return GAP_CONNECTION_ACL; 6114 default: 6115 return GAP_CONNECTION_INVALID; 6116 } 6117 } 6118 6119 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6120 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6121 if (!conn) return HCI_ROLE_INVALID; 6122 return (hci_role_t) conn->role; 6123 } 6124 6125 6126 #ifdef ENABLE_CLASSIC 6127 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6128 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6129 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6130 conn->request_role = role; 6131 hci_run(); 6132 return ERROR_CODE_SUCCESS; 6133 } 6134 #endif 6135 6136 #ifdef ENABLE_BLE 6137 6138 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){ 6139 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6140 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6141 6142 conn->le_phy_update_all_phys = all_phys; 6143 conn->le_phy_update_tx_phys = tx_phys; 6144 conn->le_phy_update_rx_phys = rx_phys; 6145 conn->le_phy_update_phy_options = phy_options; 6146 6147 hci_run(); 6148 6149 return 0; 6150 } 6151 6152 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6153 // check if already in list 6154 btstack_linked_list_iterator_t it; 6155 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6156 while (btstack_linked_list_iterator_has_next(&it)) { 6157 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6158 if (entry->address_type != address_type) { 6159 continue; 6160 } 6161 if (memcmp(entry->address, address, 6) != 0) { 6162 continue; 6163 } 6164 // disallow if already scheduled to add 6165 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6166 return ERROR_CODE_COMMAND_DISALLOWED; 6167 } 6168 // still on controller, but scheduled to remove -> re-add 6169 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6170 return ERROR_CODE_SUCCESS; 6171 } 6172 // alloc and add to list 6173 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6174 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6175 entry->address_type = address_type; 6176 (void)memcpy(entry->address, address, 6); 6177 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6178 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6179 return ERROR_CODE_SUCCESS; 6180 } 6181 6182 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6183 btstack_linked_list_iterator_t it; 6184 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6185 while (btstack_linked_list_iterator_has_next(&it)){ 6186 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6187 if (entry->address_type != address_type) { 6188 continue; 6189 } 6190 if (memcmp(entry->address, address, 6) != 0) { 6191 continue; 6192 } 6193 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6194 // remove from controller if already present 6195 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6196 } else { 6197 // directly remove entry from whitelist 6198 btstack_linked_list_iterator_remove(&it); 6199 btstack_memory_whitelist_entry_free(entry); 6200 } 6201 return ERROR_CODE_SUCCESS; 6202 } 6203 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6204 } 6205 6206 static void hci_whitelist_clear(void){ 6207 btstack_linked_list_iterator_t it; 6208 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6209 while (btstack_linked_list_iterator_has_next(&it)){ 6210 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6211 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6212 // remove from controller if already present 6213 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6214 continue; 6215 } 6216 // directly remove entry from whitelist 6217 btstack_linked_list_iterator_remove(&it); 6218 btstack_memory_whitelist_entry_free(entry); 6219 } 6220 } 6221 6222 /** 6223 * @brief Clear Whitelist 6224 * @returns 0 if ok 6225 */ 6226 uint8_t gap_whitelist_clear(void){ 6227 hci_whitelist_clear(); 6228 hci_run(); 6229 return ERROR_CODE_SUCCESS; 6230 } 6231 6232 /** 6233 * @brief Add Device to Whitelist 6234 * @param address_typ 6235 * @param address 6236 * @returns 0 if ok 6237 */ 6238 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6239 uint8_t status = hci_whitelist_add(address_type, address); 6240 if (status){ 6241 return status; 6242 } 6243 hci_run(); 6244 return ERROR_CODE_SUCCESS; 6245 } 6246 6247 /** 6248 * @brief Remove Device from Whitelist 6249 * @param address_typ 6250 * @param address 6251 * @returns 0 if ok 6252 */ 6253 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6254 uint8_t status = hci_whitelist_remove(address_type, address); 6255 if (status){ 6256 return status; 6257 } 6258 hci_run(); 6259 return ERROR_CODE_SUCCESS; 6260 } 6261 6262 #ifdef ENABLE_LE_CENTRAL 6263 /** 6264 * @brief Connect with Whitelist 6265 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6266 * @returns - if ok 6267 */ 6268 uint8_t gap_connect_with_whitelist(void){ 6269 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6270 return ERROR_CODE_COMMAND_DISALLOWED; 6271 } 6272 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6273 hci_run(); 6274 return ERROR_CODE_SUCCESS; 6275 } 6276 6277 /** 6278 * @brief Auto Connection Establishment - Start Connecting to device 6279 * @param address_typ 6280 * @param address 6281 * @returns 0 if ok 6282 */ 6283 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6284 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6285 return ERROR_CODE_COMMAND_DISALLOWED; 6286 } 6287 6288 uint8_t status = hci_whitelist_add(address_type, address); 6289 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6290 return status; 6291 } 6292 6293 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6294 6295 hci_run(); 6296 return ERROR_CODE_SUCCESS; 6297 } 6298 6299 /** 6300 * @brief Auto Connection Establishment - Stop Connecting to device 6301 * @param address_typ 6302 * @param address 6303 * @returns 0 if ok 6304 */ 6305 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6306 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6307 return ERROR_CODE_COMMAND_DISALLOWED; 6308 } 6309 6310 hci_whitelist_remove(address_type, address); 6311 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6312 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6313 } 6314 hci_run(); 6315 return 0; 6316 } 6317 6318 /** 6319 * @brief Auto Connection Establishment - Stop everything 6320 * @note Convenience function to stop all active auto connection attempts 6321 */ 6322 uint8_t gap_auto_connection_stop_all(void){ 6323 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6324 return ERROR_CODE_COMMAND_DISALLOWED; 6325 } 6326 hci_whitelist_clear(); 6327 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6328 hci_run(); 6329 return ERROR_CODE_SUCCESS; 6330 } 6331 6332 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6333 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6334 if (!conn) return 0; 6335 return conn->le_connection_interval; 6336 } 6337 #endif 6338 #endif 6339 6340 #ifdef ENABLE_CLASSIC 6341 /** 6342 * @brief Set Extended Inquiry Response data 6343 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6344 * @note has to be done before stack starts up 6345 */ 6346 void gap_set_extended_inquiry_response(const uint8_t * data){ 6347 hci_stack->eir_data = data; 6348 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6349 hci_run(); 6350 } 6351 6352 /** 6353 * @brief Start GAP Classic Inquiry 6354 * @param duration in 1.28s units 6355 * @return 0 if ok 6356 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6357 */ 6358 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6359 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6360 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6361 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6362 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6363 } 6364 hci_stack->inquiry_state = duration_in_1280ms_units; 6365 hci_run(); 6366 return 0; 6367 } 6368 6369 /** 6370 * @brief Stop GAP Classic Inquiry 6371 * @returns 0 if ok 6372 */ 6373 int gap_inquiry_stop(void){ 6374 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6375 // emit inquiry complete event, before it even started 6376 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6377 hci_emit_event(event, sizeof(event), 1); 6378 return 0; 6379 } 6380 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6381 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6382 hci_run(); 6383 return 0; 6384 } 6385 6386 void gap_inquiry_set_lap(uint32_t lap){ 6387 hci_stack->inquiry_lap = lap; 6388 } 6389 6390 6391 /** 6392 * @brief Remote Name Request 6393 * @param addr 6394 * @param page_scan_repetition_mode 6395 * @param clock_offset only used when bit 15 is set 6396 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6397 */ 6398 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6399 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6400 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6401 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6402 hci_stack->remote_name_clock_offset = clock_offset; 6403 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6404 hci_run(); 6405 return 0; 6406 } 6407 6408 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6409 hci_stack->gap_pairing_state = state; 6410 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6411 hci_run(); 6412 return 0; 6413 } 6414 6415 /** 6416 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6417 * @param addr 6418 * @param pin_data 6419 * @param pin_len 6420 * @return 0 if ok 6421 */ 6422 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6423 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6424 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6425 hci_stack->gap_pairing_pin_len = pin_len; 6426 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6427 } 6428 6429 /** 6430 * @brief Legacy Pairing Pin Code Response 6431 * @param addr 6432 * @param pin 6433 * @return 0 if ok 6434 */ 6435 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6436 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6437 } 6438 6439 /** 6440 * @brief Abort Legacy Pairing 6441 * @param addr 6442 * @param pin 6443 * @return 0 if ok 6444 */ 6445 int gap_pin_code_negative(bd_addr_t addr){ 6446 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6447 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6448 } 6449 6450 /** 6451 * @brief SSP Passkey Response 6452 * @param addr 6453 * @param passkey 6454 * @return 0 if ok 6455 */ 6456 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6457 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6458 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6459 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6460 } 6461 6462 /** 6463 * @brief Abort SSP Passkey Entry/Pairing 6464 * @param addr 6465 * @param pin 6466 * @return 0 if ok 6467 */ 6468 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6469 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6470 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6471 } 6472 6473 /** 6474 * @brief Accept SSP Numeric Comparison 6475 * @param addr 6476 * @param passkey 6477 * @return 0 if ok 6478 */ 6479 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6480 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6481 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6482 } 6483 6484 /** 6485 * @brief Abort SSP Numeric Comparison/Pairing 6486 * @param addr 6487 * @param pin 6488 * @return 0 if ok 6489 */ 6490 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6491 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6492 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6493 } 6494 6495 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6496 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6497 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6498 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6499 connectionSetAuthenticationFlags(conn, flag); 6500 hci_run(); 6501 return ERROR_CODE_SUCCESS; 6502 } 6503 #endif 6504 6505 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6506 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6507 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6508 } 6509 6510 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6511 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6512 } 6513 #endif 6514 6515 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6516 /** 6517 * @brief Report Remote OOB Data 6518 * @param bd_addr 6519 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6520 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6521 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6522 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6523 */ 6524 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){ 6525 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6526 if (connection == NULL) { 6527 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6528 } 6529 connection->classic_oob_c_192 = c_192; 6530 connection->classic_oob_r_192 = r_192; 6531 6532 // ignore P-256 if not supported by us 6533 if (hci_stack->secure_connections_active){ 6534 connection->classic_oob_c_256 = c_256; 6535 connection->classic_oob_r_256 = r_256; 6536 } 6537 6538 return ERROR_CODE_SUCCESS; 6539 } 6540 /** 6541 * @brief Generate new OOB data 6542 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6543 */ 6544 void gap_ssp_generate_oob_data(void){ 6545 hci_stack->classic_read_local_oob_data = true; 6546 hci_run(); 6547 } 6548 6549 #endif 6550 6551 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6552 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6553 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6554 if (connection == NULL) { 6555 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6556 } 6557 6558 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6559 connection->link_key_type = type; 6560 6561 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6562 } 6563 6564 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6565 /** 6566 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6567 * @param inquiry_mode see bluetooth_defines.h 6568 */ 6569 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6570 hci_stack->inquiry_mode = inquiry_mode; 6571 } 6572 6573 /** 6574 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6575 */ 6576 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6577 hci_stack->sco_voice_setting = voice_setting; 6578 } 6579 6580 /** 6581 * @brief Get SCO Voice Setting 6582 * @return current voice setting 6583 */ 6584 uint16_t hci_get_sco_voice_setting(void){ 6585 return hci_stack->sco_voice_setting; 6586 } 6587 6588 static int hci_have_usb_transport(void){ 6589 if (!hci_stack->hci_transport) return 0; 6590 const char * transport_name = hci_stack->hci_transport->name; 6591 if (!transport_name) return 0; 6592 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6593 } 6594 6595 /** @brief Get SCO packet length for current SCO Voice setting 6596 * @note Using SCO packets of the exact length is required for USB transfer 6597 * @return Length of SCO packets in bytes (not audio frames) 6598 */ 6599 uint16_t hci_get_sco_packet_length(void){ 6600 uint16_t sco_packet_length = 0; 6601 6602 #ifdef ENABLE_SCO_OVER_HCI 6603 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6604 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6605 6606 if (hci_have_usb_transport()){ 6607 // see Core Spec for H2 USB Transfer. 6608 // 3 byte SCO header + 24 bytes per connection 6609 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6610 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6611 } else { 6612 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6613 sco_packet_length = 3 + 60 * multiplier; 6614 // assert that it still fits inside an SCO buffer 6615 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6616 sco_packet_length = 3 + 60; 6617 } 6618 } 6619 #endif 6620 6621 #ifdef HAVE_SCO_TRANSPORT 6622 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6623 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6624 sco_packet_length = 3 + 60 * multiplier; 6625 #endif 6626 return sco_packet_length; 6627 } 6628 6629 /** 6630 * @brief Sets the master/slave policy 6631 * @param policy (0: attempt to become master, 1: let connecting device decide) 6632 */ 6633 void hci_set_master_slave_policy(uint8_t policy){ 6634 hci_stack->master_slave_policy = policy; 6635 } 6636 6637 #endif 6638 6639 HCI_STATE hci_get_state(void){ 6640 return hci_stack->state; 6641 } 6642 6643 #ifdef ENABLE_CLASSIC 6644 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6645 hci_stack->gap_classic_accept_callback = accept_callback; 6646 } 6647 #endif 6648 6649 /** 6650 * @brief Set callback for Bluetooth Hardware Error 6651 */ 6652 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6653 hci_stack->hardware_error_callback = fn; 6654 } 6655 6656 void hci_disconnect_all(void){ 6657 btstack_linked_list_iterator_t it; 6658 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6659 while (btstack_linked_list_iterator_has_next(&it)){ 6660 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6661 if (con->state == SENT_DISCONNECT) continue; 6662 con->state = SEND_DISCONNECT; 6663 } 6664 hci_run(); 6665 } 6666 6667 uint16_t hci_get_manufacturer(void){ 6668 return hci_stack->manufacturer; 6669 } 6670 6671 #ifdef ENABLE_BLE 6672 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6673 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6674 if (!hci_con) return NULL; 6675 return &hci_con->sm_connection; 6676 } 6677 6678 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6679 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6680 #endif 6681 6682 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6683 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6684 if (hci_connection == NULL) return 0; 6685 if (hci_is_le_connection(hci_connection)){ 6686 #ifdef ENABLE_BLE 6687 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6688 if (sm_conn->sm_connection_encrypted) { 6689 return sm_conn->sm_actual_encryption_key_size; 6690 } 6691 #endif 6692 } else { 6693 #ifdef ENABLE_CLASSIC 6694 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6695 return hci_connection->encryption_key_size; 6696 } 6697 #endif 6698 } 6699 return 0; 6700 } 6701 6702 int gap_authenticated(hci_con_handle_t con_handle){ 6703 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6704 if (hci_connection == NULL) return 0; 6705 6706 switch (hci_connection->address_type){ 6707 #ifdef ENABLE_BLE 6708 case BD_ADDR_TYPE_LE_PUBLIC: 6709 case BD_ADDR_TYPE_LE_RANDOM: 6710 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6711 return hci_connection->sm_connection.sm_connection_authenticated; 6712 #endif 6713 #ifdef ENABLE_CLASSIC 6714 case BD_ADDR_TYPE_SCO: 6715 case BD_ADDR_TYPE_ACL: 6716 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6717 #endif 6718 default: 6719 return 0; 6720 } 6721 } 6722 6723 int gap_secure_connection(hci_con_handle_t con_handle){ 6724 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6725 if (hci_connection == NULL) return 0; 6726 6727 switch (hci_connection->address_type){ 6728 #ifdef ENABLE_BLE 6729 case BD_ADDR_TYPE_LE_PUBLIC: 6730 case BD_ADDR_TYPE_LE_RANDOM: 6731 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6732 return hci_connection->sm_connection.sm_connection_sc; 6733 #endif 6734 #ifdef ENABLE_CLASSIC 6735 case BD_ADDR_TYPE_SCO: 6736 case BD_ADDR_TYPE_ACL: 6737 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6738 #endif 6739 default: 6740 return 0; 6741 } 6742 } 6743 6744 bool gap_bonded(hci_con_handle_t con_handle){ 6745 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6746 if (hci_connection == NULL) return 0; 6747 6748 #ifdef ENABLE_CLASSIC 6749 link_key_t link_key; 6750 link_key_type_t link_key_type; 6751 #endif 6752 switch (hci_connection->address_type){ 6753 #ifdef ENABLE_BLE 6754 case BD_ADDR_TYPE_LE_PUBLIC: 6755 case BD_ADDR_TYPE_LE_RANDOM: 6756 return hci_connection->sm_connection.sm_le_db_index >= 0; 6757 #endif 6758 #ifdef ENABLE_CLASSIC 6759 case BD_ADDR_TYPE_SCO: 6760 case BD_ADDR_TYPE_ACL: 6761 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6762 #endif 6763 default: 6764 return false; 6765 } 6766 } 6767 6768 #ifdef ENABLE_BLE 6769 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6770 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6771 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6772 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6773 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6774 return sm_conn->sm_connection_authorization_state; 6775 } 6776 #endif 6777 6778 #ifdef ENABLE_CLASSIC 6779 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){ 6780 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6781 if (!conn) return GAP_CONNECTION_INVALID; 6782 conn->sniff_min_interval = sniff_min_interval; 6783 conn->sniff_max_interval = sniff_max_interval; 6784 conn->sniff_attempt = sniff_attempt; 6785 conn->sniff_timeout = sniff_timeout; 6786 hci_run(); 6787 return 0; 6788 } 6789 6790 /** 6791 * @brief Exit Sniff mode 6792 * @param con_handle 6793 @ @return 0 if ok 6794 */ 6795 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6796 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6797 if (!conn) return GAP_CONNECTION_INVALID; 6798 conn->sniff_min_interval = 0xffff; 6799 hci_run(); 6800 return 0; 6801 } 6802 6803 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){ 6804 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6805 if (!conn) return GAP_CONNECTION_INVALID; 6806 conn->sniff_subrating_max_latency = max_latency; 6807 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6808 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6809 hci_run(); 6810 return ERROR_CODE_SUCCESS; 6811 } 6812 6813 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){ 6814 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6815 if (!conn) return GAP_CONNECTION_INVALID; 6816 conn->qos_service_type = service_type; 6817 conn->qos_token_rate = token_rate; 6818 conn->qos_peak_bandwidth = peak_bandwidth; 6819 conn->qos_latency = latency; 6820 conn->qos_delay_variation = delay_variation; 6821 hci_run(); 6822 return ERROR_CODE_SUCCESS; 6823 } 6824 6825 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6826 hci_stack->new_page_scan_interval = page_scan_interval; 6827 hci_stack->new_page_scan_window = page_scan_window; 6828 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6829 hci_run(); 6830 } 6831 6832 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6833 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6834 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6835 hci_run(); 6836 } 6837 6838 #endif 6839 6840 void hci_halting_defer(void){ 6841 if (hci_stack->state != HCI_STATE_HALTING) return; 6842 switch (hci_stack->substate){ 6843 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6844 case HCI_HALTING_CLOSE: 6845 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6846 break; 6847 default: 6848 break; 6849 } 6850 } 6851 6852 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6853 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6854 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6855 if (le_device_db_index >= le_device_db_max_count()) return; 6856 uint8_t offset = le_device_db_index >> 3; 6857 uint8_t mask = 1 << (le_device_db_index & 7); 6858 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6859 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6860 // note: go back to remove entries, otherwise, a remove + add will skip the add 6861 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6862 } 6863 } 6864 6865 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6866 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6867 if (le_device_db_index >= le_device_db_max_count()) return; 6868 uint8_t offset = le_device_db_index >> 3; 6869 uint8_t mask = 1 << (le_device_db_index & 7); 6870 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6871 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6872 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6873 } 6874 } 6875 6876 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6877 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6878 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6879 } 6880 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6881 // restart le resolving list update 6882 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6883 } 6884 return ERROR_CODE_SUCCESS; 6885 } 6886 #endif 6887 6888 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6889 void hci_setup_test_connections_fuzz(void){ 6890 hci_connection_t * conn; 6891 6892 // default address: 66:55:44:33:00:01 6893 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6894 6895 // setup Controller info 6896 hci_stack->num_cmd_packets = 255; 6897 hci_stack->acl_packets_total_num = 255; 6898 6899 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6900 addr[5] = 0x01; 6901 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6902 conn->con_handle = addr[5]; 6903 conn->role = HCI_ROLE_SLAVE; 6904 conn->state = RECEIVED_CONNECTION_REQUEST; 6905 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6906 6907 // setup incoming Classic SCO connection with con handle 0x0002 6908 addr[5] = 0x02; 6909 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6910 conn->con_handle = addr[5]; 6911 conn->role = HCI_ROLE_SLAVE; 6912 conn->state = RECEIVED_CONNECTION_REQUEST; 6913 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6914 6915 // setup ready Classic ACL connection with con handle 0x0003 6916 addr[5] = 0x03; 6917 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6918 conn->con_handle = addr[5]; 6919 conn->role = HCI_ROLE_SLAVE; 6920 conn->state = OPEN; 6921 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6922 6923 // setup ready Classic SCO connection with con handle 0x0004 6924 addr[5] = 0x04; 6925 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6926 conn->con_handle = addr[5]; 6927 conn->role = HCI_ROLE_SLAVE; 6928 conn->state = OPEN; 6929 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6930 6931 // setup ready LE ACL connection with con handle 0x005 and public address 6932 addr[5] = 0x05; 6933 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6934 conn->con_handle = addr[5]; 6935 conn->role = HCI_ROLE_SLAVE; 6936 conn->state = OPEN; 6937 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6938 conn->sm_connection.sm_connection_encrypted = 1; 6939 } 6940 6941 void hci_free_connections_fuzz(void){ 6942 btstack_linked_list_iterator_t it; 6943 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6944 while (btstack_linked_list_iterator_has_next(&it)){ 6945 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6946 btstack_linked_list_iterator_remove(&it); 6947 btstack_memory_hci_connection_free(con); 6948 } 6949 } 6950 void hci_simulate_working_fuzz(void){ 6951 hci_init_done(); 6952 hci_stack->num_cmd_packets = 255; 6953 } 6954 #endif 6955