1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // prototypes 136 #ifdef ENABLE_CLASSIC 137 static void hci_update_scan_enable(void); 138 static void hci_emit_discoverable_enabled(uint8_t enabled); 139 static int hci_local_ssp_activated(void); 140 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 141 static bool hci_ssp_supported(hci_connection_t * connection); 142 static void hci_notify_if_sco_can_send_now(void); 143 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 144 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 145 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 146 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 147 static void hci_connection_timestamp(hci_connection_t *connection); 148 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 149 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 150 #endif 151 152 static int hci_power_control_on(void); 153 static void hci_power_control_off(void); 154 static void hci_state_reset(void); 155 static void hci_emit_transport_packet_sent(void); 156 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 157 static void hci_emit_nr_connections_changed(void); 158 static void hci_emit_hci_open_failed(void); 159 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 160 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 161 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 162 static void hci_run(void); 163 static int hci_is_le_connection(hci_connection_t * connection); 164 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 165 166 #ifdef ENABLE_CLASSIC 167 static int hci_have_usb_transport(void); 168 #endif 169 170 #ifdef ENABLE_BLE 171 #ifdef ENABLE_LE_CENTRAL 172 // called from test/ble_client/advertising_data_parser.c 173 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 174 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 175 static hci_connection_t * gap_get_outgoing_connection(void); 176 #endif 177 #endif 178 179 // the STACK is here 180 #ifndef HAVE_MALLOC 181 static hci_stack_t hci_stack_static; 182 #endif 183 static hci_stack_t * hci_stack = NULL; 184 185 #ifdef ENABLE_CLASSIC 186 // default name 187 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 188 189 // test helper 190 static uint8_t disable_l2cap_timeouts = 0; 191 #endif 192 193 // reset connection state on create and on reconnect 194 // don't overwrite addr, con handle, role 195 static void hci_connection_init(hci_connection_t * conn){ 196 conn->authentication_flags = AUTH_FLAG_NONE; 197 conn->bonding_flags = 0; 198 conn->requested_security_level = LEVEL_0; 199 #ifdef ENABLE_CLASSIC 200 conn->request_role = HCI_ROLE_INVALID; 201 conn->sniff_subrating_max_latency = 0xffff; 202 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 203 conn->link_key_type = INVALID_LINK_KEY; 204 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 205 btstack_run_loop_set_timer_context(&conn->timeout, conn); 206 hci_connection_timestamp(conn); 207 #endif 208 conn->acl_recombination_length = 0; 209 conn->acl_recombination_pos = 0; 210 conn->num_packets_sent = 0; 211 212 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 213 #ifdef ENABLE_BLE 214 conn->le_phy_update_all_phys = 0xff; 215 #endif 216 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 217 conn->le_max_tx_octets = 27; 218 #endif 219 #ifdef ENABLE_CLASSIC_PAIRING_OOB 220 conn->classic_oob_c_192 = NULL; 221 conn->classic_oob_r_192 = NULL; 222 conn->classic_oob_c_256 = NULL; 223 conn->classic_oob_r_256 = NULL; 224 #endif 225 } 226 227 /** 228 * create connection for given address 229 * 230 * @return connection OR NULL, if no memory left 231 */ 232 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 233 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 234 235 hci_connection_t * conn = btstack_memory_hci_connection_get(); 236 if (!conn) return NULL; 237 hci_connection_init(conn); 238 239 bd_addr_copy(conn->address, addr); 240 conn->address_type = addr_type; 241 conn->con_handle = HCI_CON_HANDLE_INVALID; 242 conn->role = HCI_ROLE_INVALID; 243 244 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 245 246 return conn; 247 } 248 249 250 /** 251 * get le connection parameter range 252 * 253 * @return le connection parameter range struct 254 */ 255 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 256 *range = hci_stack->le_connection_parameter_range; 257 } 258 259 /** 260 * set le connection parameter range 261 * 262 */ 263 264 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 265 hci_stack->le_connection_parameter_range = *range; 266 } 267 268 /** 269 * @brief Test if connection parameters are inside in existing rage 270 * @param conn_interval_min (unit: 1.25ms) 271 * @param conn_interval_max (unit: 1.25ms) 272 * @param conn_latency 273 * @param supervision_timeout (unit: 10ms) 274 * @returns 1 if included 275 */ 276 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 277 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 278 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 279 280 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 281 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 282 283 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 284 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 285 286 return 1; 287 } 288 289 /** 290 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 291 * @note: default: 1 292 * @param max_peripheral_connections 293 */ 294 #ifdef ENABLE_LE_PERIPHERAL 295 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 296 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 297 } 298 #endif 299 300 /** 301 * get hci connections iterator 302 * 303 * @return hci connections iterator 304 */ 305 306 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 307 btstack_linked_list_iterator_init(it, &hci_stack->connections); 308 } 309 310 /** 311 * get connection for a given handle 312 * 313 * @return connection OR NULL, if not found 314 */ 315 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 316 btstack_linked_list_iterator_t it; 317 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 318 while (btstack_linked_list_iterator_has_next(&it)){ 319 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 320 if ( item->con_handle == con_handle ) { 321 return item; 322 } 323 } 324 return NULL; 325 } 326 327 /** 328 * get connection for given address 329 * 330 * @return connection OR NULL, if not found 331 */ 332 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 337 if (connection->address_type != addr_type) continue; 338 if (memcmp(addr, connection->address, 6) != 0) continue; 339 return connection; 340 } 341 return NULL; 342 } 343 344 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 345 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 346 } 347 348 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 350 } 351 352 #ifdef ENABLE_CLASSIC 353 354 #ifdef ENABLE_SCO_OVER_HCI 355 static int hci_number_sco_connections(void){ 356 int connections = 0; 357 btstack_linked_list_iterator_t it; 358 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 359 while (btstack_linked_list_iterator_has_next(&it)){ 360 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 361 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 362 connections++; 363 } 364 return connections; 365 } 366 #endif 367 368 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 369 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 370 #ifdef HAVE_EMBEDDED_TICK 371 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 372 // connections might be timed out 373 hci_emit_l2cap_check_timeout(connection); 374 } 375 #else 376 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 377 // connections might be timed out 378 hci_emit_l2cap_check_timeout(connection); 379 } 380 #endif 381 } 382 383 static void hci_connection_timestamp(hci_connection_t *connection){ 384 #ifdef HAVE_EMBEDDED_TICK 385 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 386 #else 387 connection->timestamp = btstack_run_loop_get_time_ms(); 388 #endif 389 } 390 391 /** 392 * add authentication flags and reset timer 393 * @note: assumes classic connection 394 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 395 */ 396 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 397 bd_addr_t addr; 398 reverse_bd_addr(bd_addr, addr); 399 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 400 if (conn) { 401 connectionSetAuthenticationFlags(conn, flags); 402 hci_connection_timestamp(conn); 403 } 404 } 405 406 static bool hci_pairing_active(hci_connection_t * hci_connection){ 407 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 408 } 409 410 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 411 if (hci_pairing_active(hci_connection)) return; 412 if (ssp){ 413 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 414 } else { 415 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 416 } 417 // if we are initiator, we have sent an HCI Authenticate Request 418 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 419 420 // if we are responder, use minimal service security level as required level 421 if (!initiator){ 422 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 423 } 424 425 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 426 427 uint8_t event[12]; 428 event[0] = GAP_EVENT_PAIRING_STARTED; 429 event[1] = 10; 430 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 431 reverse_bd_addr(hci_connection->address, &event[4]); 432 event[10] = (uint8_t) ssp; 433 event[11] = (uint8_t) initiator; 434 hci_emit_event(event, sizeof(event), 1); 435 } 436 437 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 438 hci_connection->requested_security_level = LEVEL_0; 439 if (!hci_pairing_active(hci_connection)) return; 440 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 441 #ifdef ENABLE_CLASSIC_PAIRING_OOB 442 hci_connection->classic_oob_c_192 = NULL; 443 hci_connection->classic_oob_r_192 = NULL; 444 hci_connection->classic_oob_c_256 = NULL; 445 hci_connection->classic_oob_r_256 = NULL; 446 #endif 447 log_info("pairing complete, status %02x", status); 448 449 uint8_t event[12]; 450 event[0] = GAP_EVENT_PAIRING_COMPLETE; 451 event[1] = 9; 452 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 453 reverse_bd_addr(hci_connection->address, &event[4]); 454 event[10] = status; 455 hci_emit_event(event, sizeof(event), 1); 456 } 457 458 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 459 hci_connection_t * conn = hci_connection_for_handle(handle); 460 if (!conn) return false; 461 return hci_pairing_active(conn); 462 } 463 464 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 465 if (!hci_stack->link_key_db) return; 466 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 467 hci_stack->link_key_db->delete_link_key(addr); 468 } 469 470 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 471 if (!hci_stack->link_key_db) return; 472 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 473 hci_stack->link_key_db->put_link_key(addr, link_key, type); 474 } 475 476 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 477 if (!hci_stack->link_key_db) return false; 478 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 479 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 480 return result; 481 } 482 483 void gap_delete_all_link_keys(void){ 484 bd_addr_t addr; 485 link_key_t link_key; 486 link_key_type_t type; 487 btstack_link_key_iterator_t it; 488 int ok = gap_link_key_iterator_init(&it); 489 if (!ok) { 490 log_error("could not initialize iterator"); 491 return; 492 } 493 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 494 gap_drop_link_key_for_bd_addr(addr); 495 } 496 gap_link_key_iterator_done(&it); 497 } 498 499 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 500 if (!hci_stack->link_key_db) return 0; 501 if (!hci_stack->link_key_db->iterator_init) return 0; 502 return hci_stack->link_key_db->iterator_init(it); 503 } 504 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 505 if (!hci_stack->link_key_db) return 0; 506 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 507 } 508 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 509 if (!hci_stack->link_key_db) return; 510 hci_stack->link_key_db->iterator_done(it); 511 } 512 #endif 513 514 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 515 switch (address_type){ 516 case BD_ADDR_TYPE_LE_PUBLIC: 517 case BD_ADDR_TYPE_LE_RANDOM: 518 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 519 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 520 return true; 521 default: 522 return false; 523 } 524 } 525 526 static int hci_is_le_connection(hci_connection_t * connection){ 527 return hci_is_le_connection_type(connection->address_type); 528 } 529 530 /** 531 * count connections 532 */ 533 static int nr_hci_connections(void){ 534 int count = 0; 535 btstack_linked_item_t *it; 536 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 537 count++; 538 } 539 return count; 540 } 541 542 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 543 544 unsigned int num_packets_sent_classic = 0; 545 unsigned int num_packets_sent_le = 0; 546 547 btstack_linked_item_t *it; 548 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 549 hci_connection_t * connection = (hci_connection_t *) it; 550 if (hci_is_le_connection(connection)){ 551 num_packets_sent_le += connection->num_packets_sent; 552 } 553 if (connection->address_type == BD_ADDR_TYPE_ACL){ 554 num_packets_sent_classic += connection->num_packets_sent; 555 } 556 } 557 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 558 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 559 int free_slots_le = 0; 560 561 if (free_slots_classic < 0){ 562 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 563 return 0; 564 } 565 566 if (hci_stack->le_acl_packets_total_num){ 567 // if we have LE slots, they are used 568 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 569 if (free_slots_le < 0){ 570 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 571 return 0; 572 } 573 } else { 574 // otherwise, classic slots are used for LE, too 575 free_slots_classic -= num_packets_sent_le; 576 if (free_slots_classic < 0){ 577 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 578 return 0; 579 } 580 } 581 582 switch (address_type){ 583 case BD_ADDR_TYPE_UNKNOWN: 584 log_error("hci_number_free_acl_slots: unknown address type"); 585 return 0; 586 587 case BD_ADDR_TYPE_ACL: 588 return free_slots_classic; 589 590 default: 591 if (hci_stack->le_acl_packets_total_num){ 592 return free_slots_le; 593 } 594 return free_slots_classic; 595 } 596 } 597 598 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 599 // get connection type 600 hci_connection_t * connection = hci_connection_for_handle(con_handle); 601 if (!connection){ 602 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 603 return 0; 604 } 605 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 606 } 607 608 #ifdef ENABLE_CLASSIC 609 static int hci_number_free_sco_slots(void){ 610 unsigned int num_sco_packets_sent = 0; 611 btstack_linked_item_t *it; 612 if (hci_stack->synchronous_flow_control_enabled){ 613 // explicit flow control 614 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 615 hci_connection_t * connection = (hci_connection_t *) it; 616 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 617 num_sco_packets_sent += connection->num_packets_sent; 618 } 619 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 620 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 621 return 0; 622 } 623 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 624 } else { 625 // implicit flow control -- TODO 626 int num_ready = 0; 627 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 628 hci_connection_t * connection = (hci_connection_t *) it; 629 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 630 if (connection->sco_tx_ready == 0) continue; 631 num_ready++; 632 } 633 return num_ready; 634 } 635 } 636 #endif 637 638 // only used to send HCI Host Number Completed Packets 639 static int hci_can_send_comand_packet_transport(void){ 640 if (hci_stack->hci_packet_buffer_reserved) return 0; 641 642 // check for async hci transport implementations 643 if (hci_stack->hci_transport->can_send_packet_now){ 644 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 645 return 0; 646 } 647 } 648 return 1; 649 } 650 651 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 652 bool hci_can_send_command_packet_now(void){ 653 if (hci_can_send_comand_packet_transport() == 0) return false; 654 return hci_stack->num_cmd_packets > 0u; 655 } 656 657 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 658 // check for async hci transport implementations 659 if (!hci_stack->hci_transport->can_send_packet_now) return true; 660 return hci_stack->hci_transport->can_send_packet_now(packet_type); 661 } 662 663 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 664 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 665 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 666 } 667 668 bool hci_can_send_acl_le_packet_now(void){ 669 if (hci_stack->hci_packet_buffer_reserved) return false; 670 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 671 } 672 673 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 674 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 675 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 676 } 677 678 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 679 if (hci_stack->hci_packet_buffer_reserved) return false; 680 return hci_can_send_prepared_acl_packet_now(con_handle); 681 } 682 683 #ifdef ENABLE_CLASSIC 684 bool hci_can_send_acl_classic_packet_now(void){ 685 if (hci_stack->hci_packet_buffer_reserved) return false; 686 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 687 } 688 689 bool hci_can_send_prepared_sco_packet_now(void){ 690 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 691 if (hci_have_usb_transport()){ 692 return hci_stack->sco_can_send_now; 693 } else { 694 return hci_number_free_sco_slots() > 0; 695 } 696 } 697 698 bool hci_can_send_sco_packet_now(void){ 699 if (hci_stack->hci_packet_buffer_reserved) return false; 700 return hci_can_send_prepared_sco_packet_now(); 701 } 702 703 void hci_request_sco_can_send_now_event(void){ 704 hci_stack->sco_waiting_for_can_send_now = 1; 705 hci_notify_if_sco_can_send_now(); 706 } 707 #endif 708 709 // used for internal checks in l2cap.c 710 bool hci_is_packet_buffer_reserved(void){ 711 return hci_stack->hci_packet_buffer_reserved; 712 } 713 714 // reserves outgoing packet buffer. @returns 1 if successful 715 bool hci_reserve_packet_buffer(void){ 716 if (hci_stack->hci_packet_buffer_reserved) { 717 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 718 return false; 719 } 720 hci_stack->hci_packet_buffer_reserved = true; 721 return true; 722 } 723 724 void hci_release_packet_buffer(void){ 725 hci_stack->hci_packet_buffer_reserved = false; 726 } 727 728 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 729 static int hci_transport_synchronous(void){ 730 return hci_stack->hci_transport->can_send_packet_now == NULL; 731 } 732 733 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 734 735 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 736 737 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 738 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 739 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 740 max_acl_data_packet_length = hci_stack->le_data_packets_length; 741 } 742 743 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 744 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 745 max_acl_data_packet_length = connection->le_max_tx_octets; 746 } 747 #endif 748 749 log_debug("hci_send_acl_packet_fragments entered"); 750 751 uint8_t status = ERROR_CODE_SUCCESS; 752 // multiple packets could be send on a synchronous HCI transport 753 while (true){ 754 755 log_debug("hci_send_acl_packet_fragments loop entered"); 756 757 // get current data 758 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 759 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 760 bool more_fragments = false; 761 762 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 763 if (current_acl_data_packet_length > max_acl_data_packet_length){ 764 more_fragments = true; 765 current_acl_data_packet_length = max_acl_data_packet_length; 766 } 767 768 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 769 if (acl_header_pos > 0u){ 770 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 771 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 772 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 773 } 774 775 // update header len 776 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 777 778 // count packet 779 connection->num_packets_sent++; 780 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 781 782 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 783 if (more_fragments){ 784 // update start of next fragment to send 785 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 786 } else { 787 // done 788 hci_stack->acl_fragmentation_pos = 0; 789 hci_stack->acl_fragmentation_total_size = 0; 790 } 791 792 // send packet 793 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 794 const int size = current_acl_data_packet_length + 4; 795 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 796 hci_stack->acl_fragmentation_tx_active = 1; 797 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 798 if (err != 0){ 799 // no error from HCI Transport expected 800 status = ERROR_CODE_HARDWARE_FAILURE; 801 } 802 803 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 804 805 // done yet? 806 if (!more_fragments) break; 807 808 // can send more? 809 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 810 } 811 812 log_debug("hci_send_acl_packet_fragments loop over"); 813 814 // release buffer now for synchronous transport 815 if (hci_transport_synchronous()){ 816 hci_stack->acl_fragmentation_tx_active = 0; 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 } 820 821 return status; 822 } 823 824 // pre: caller has reserved the packet buffer 825 uint8_t hci_send_acl_packet_buffer(int size){ 826 btstack_assert(hci_stack->hci_packet_buffer_reserved); 827 828 uint8_t * packet = hci_stack->hci_packet_buffer; 829 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 830 831 // check for free places on Bluetooth module 832 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 833 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 834 hci_release_packet_buffer(); 835 hci_emit_transport_packet_sent(); 836 return BTSTACK_ACL_BUFFERS_FULL; 837 } 838 839 hci_connection_t *connection = hci_connection_for_handle( con_handle); 840 if (!connection) { 841 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 842 hci_release_packet_buffer(); 843 hci_emit_transport_packet_sent(); 844 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 845 } 846 847 #ifdef ENABLE_CLASSIC 848 hci_connection_timestamp(connection); 849 #endif 850 851 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 852 853 // setup data 854 hci_stack->acl_fragmentation_total_size = size; 855 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 856 857 return hci_send_acl_packet_fragments(connection); 858 } 859 860 #ifdef ENABLE_CLASSIC 861 // pre: caller has reserved the packet buffer 862 uint8_t hci_send_sco_packet_buffer(int size){ 863 btstack_assert(hci_stack->hci_packet_buffer_reserved); 864 865 uint8_t * packet = hci_stack->hci_packet_buffer; 866 867 // skip checks in loopback mode 868 if (!hci_stack->loopback_mode){ 869 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 870 871 // check for free places on Bluetooth module 872 if (!hci_can_send_prepared_sco_packet_now()) { 873 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 874 hci_release_packet_buffer(); 875 hci_emit_transport_packet_sent(); 876 return BTSTACK_ACL_BUFFERS_FULL; 877 } 878 879 // track send packet in connection struct 880 hci_connection_t *connection = hci_connection_for_handle( con_handle); 881 if (!connection) { 882 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 883 hci_release_packet_buffer(); 884 hci_emit_transport_packet_sent(); 885 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 886 } 887 888 if (hci_have_usb_transport()){ 889 // token used 890 hci_stack->sco_can_send_now = false; 891 } else { 892 if (hci_stack->synchronous_flow_control_enabled){ 893 connection->num_packets_sent++; 894 } else { 895 connection->sco_tx_ready--; 896 } 897 } 898 } 899 900 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 901 902 #ifdef HAVE_SCO_TRANSPORT 903 hci_stack->sco_transport->send_packet(packet, size); 904 hci_release_packet_buffer(); 905 hci_emit_transport_packet_sent(); 906 907 return 0; 908 #else 909 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 910 if (hci_transport_synchronous()){ 911 hci_release_packet_buffer(); 912 hci_emit_transport_packet_sent(); 913 } 914 915 if (err != 0){ 916 return ERROR_CODE_HARDWARE_FAILURE; 917 } 918 return ERROR_CODE_SUCCESS; 919 #endif 920 } 921 #endif 922 923 static void acl_handler(uint8_t *packet, uint16_t size){ 924 925 // get info 926 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 927 hci_connection_t *conn = hci_connection_for_handle(con_handle); 928 uint8_t acl_flags = READ_ACL_FLAGS(packet); 929 uint16_t acl_length = READ_ACL_LENGTH(packet); 930 931 // ignore non-registered handle 932 if (!conn){ 933 log_error("acl_handler called with non-registered handle %u!" , con_handle); 934 return; 935 } 936 937 // assert packet is complete 938 if ((acl_length + 4u) != size){ 939 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 940 return; 941 } 942 943 #ifdef ENABLE_CLASSIC 944 // update idle timestamp 945 hci_connection_timestamp(conn); 946 #endif 947 948 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 949 hci_stack->host_completed_packets = 1; 950 conn->num_packets_completed++; 951 #endif 952 953 // handle different packet types 954 switch (acl_flags & 0x03u) { 955 956 case 0x01: // continuation fragment 957 958 // sanity checks 959 if (conn->acl_recombination_pos == 0u) { 960 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 961 return; 962 } 963 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 964 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 965 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 966 conn->acl_recombination_pos = 0; 967 return; 968 } 969 970 // append fragment payload (header already stored) 971 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 972 &packet[4], acl_length); 973 conn->acl_recombination_pos += acl_length; 974 975 // forward complete L2CAP packet if complete. 976 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 977 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 978 // reset recombination buffer 979 conn->acl_recombination_length = 0; 980 conn->acl_recombination_pos = 0; 981 } 982 break; 983 984 case 0x02: { // first fragment 985 986 // sanity check 987 if (conn->acl_recombination_pos) { 988 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 989 conn->acl_recombination_pos = 0; 990 } 991 992 // peek into L2CAP packet! 993 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 994 995 // compare fragment size to L2CAP packet size 996 if (acl_length >= (l2cap_length + 4u)){ 997 // forward fragment as L2CAP packet 998 hci_emit_acl_packet(packet, acl_length + 4u); 999 } else { 1000 1001 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1002 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1003 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1004 return; 1005 } 1006 1007 // store first fragment and tweak acl length for complete package 1008 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1009 packet, acl_length + 4u); 1010 conn->acl_recombination_pos = acl_length + 4u; 1011 conn->acl_recombination_length = l2cap_length; 1012 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1013 } 1014 break; 1015 1016 } 1017 default: 1018 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1019 return; 1020 } 1021 1022 // execute main loop 1023 hci_run(); 1024 } 1025 1026 static void hci_connection_stop_timer(hci_connection_t * conn){ 1027 btstack_run_loop_remove_timer(&conn->timeout); 1028 #ifdef ENABLE_CLASSIC 1029 btstack_run_loop_remove_timer(&conn->timeout_sco); 1030 #endif 1031 } 1032 1033 static void hci_shutdown_connection(hci_connection_t *conn){ 1034 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1035 1036 #ifdef ENABLE_CLASSIC 1037 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1038 bd_addr_type_t addr_type = conn->address_type; 1039 #endif 1040 #ifdef HAVE_SCO_TRANSPORT 1041 hci_con_handle_t con_handle = conn->con_handle; 1042 #endif 1043 #endif 1044 1045 hci_connection_stop_timer(conn); 1046 1047 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1048 btstack_memory_hci_connection_free( conn ); 1049 1050 // now it's gone 1051 hci_emit_nr_connections_changed(); 1052 1053 #ifdef ENABLE_CLASSIC 1054 #ifdef ENABLE_SCO_OVER_HCI 1055 // update SCO 1056 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1057 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1058 } 1059 #endif 1060 #ifdef HAVE_SCO_TRANSPORT 1061 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1062 hci_stack->sco_transport->close(con_handle); 1063 } 1064 #endif 1065 #endif 1066 } 1067 1068 #ifdef ENABLE_CLASSIC 1069 1070 static const uint16_t packet_type_sizes[] = { 1071 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1072 HCI_ACL_DH1_SIZE, 0, 0, 0, 1073 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1074 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1075 }; 1076 static const uint8_t packet_type_feature_requirement_bit[] = { 1077 0, // 3 slot packets 1078 1, // 5 slot packets 1079 25, // EDR 2 mpbs 1080 26, // EDR 3 mbps 1081 39, // 3 slot EDR packts 1082 40, // 5 slot EDR packet 1083 }; 1084 static const uint16_t packet_type_feature_packet_mask[] = { 1085 0x0f00, // 3 slot packets 1086 0xf000, // 5 slot packets 1087 0x1102, // EDR 2 mpbs 1088 0x2204, // EDR 3 mbps 1089 0x0300, // 3 slot EDR packts 1090 0x3000, // 5 slot EDR packet 1091 }; 1092 1093 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1094 // enable packet types based on size 1095 uint16_t packet_types = 0; 1096 unsigned int i; 1097 for (i=0;i<16;i++){ 1098 if (packet_type_sizes[i] == 0) continue; 1099 if (packet_type_sizes[i] <= buffer_size){ 1100 packet_types |= 1 << i; 1101 } 1102 } 1103 // disable packet types due to missing local supported features 1104 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1105 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1106 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1107 if (feature_set) continue; 1108 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1109 packet_types &= ~packet_type_feature_packet_mask[i]; 1110 } 1111 // flip bits for "may not be used" 1112 packet_types ^= 0x3306; 1113 return packet_types; 1114 } 1115 1116 uint16_t hci_usable_acl_packet_types(void){ 1117 return hci_stack->packet_types; 1118 } 1119 #endif 1120 1121 uint8_t* hci_get_outgoing_packet_buffer(void){ 1122 // hci packet buffer is >= acl data packet length 1123 return hci_stack->hci_packet_buffer; 1124 } 1125 1126 uint16_t hci_max_acl_data_packet_length(void){ 1127 return hci_stack->acl_data_packet_length; 1128 } 1129 1130 #ifdef ENABLE_CLASSIC 1131 bool hci_extended_sco_link_supported(void){ 1132 // No. 31, byte 3, bit 7 1133 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1134 } 1135 #endif 1136 1137 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1138 // No. 54, byte 6, bit 6 1139 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1140 } 1141 1142 static int gap_ssp_supported(void){ 1143 // No. 51, byte 6, bit 3 1144 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1145 } 1146 1147 static int hci_classic_supported(void){ 1148 #ifdef ENABLE_CLASSIC 1149 // No. 37, byte 4, bit 5, = No BR/EDR Support 1150 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1151 #else 1152 return 0; 1153 #endif 1154 } 1155 1156 static int hci_le_supported(void){ 1157 #ifdef ENABLE_BLE 1158 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1159 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1160 #else 1161 return 0; 1162 #endif 1163 } 1164 1165 #ifdef ENABLE_BLE 1166 1167 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1168 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1169 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1170 } else { 1171 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1172 } 1173 } 1174 1175 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1176 *addr_type = hci_stack->le_own_addr_type; 1177 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1178 } 1179 1180 #ifdef ENABLE_LE_PERIPHERAL 1181 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1182 *addr_type = hci_stack->le_advertisements_own_addr_type; 1183 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1184 }; 1185 #endif 1186 1187 #ifdef ENABLE_LE_CENTRAL 1188 1189 /** 1190 * @brief Get own addr type and address used for LE connections (Central) 1191 */ 1192 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1193 *addr_type = hci_stack->le_connection_own_addr_type; 1194 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1195 } 1196 1197 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1198 1199 int offset = 3; 1200 int num_reports = packet[offset]; 1201 offset += 1; 1202 1203 int i; 1204 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1205 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1206 for (i=0; (i<num_reports) && (offset < size);i++){ 1207 // sanity checks on data_length: 1208 uint8_t data_length = packet[offset + 8]; 1209 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1210 if ((offset + 9u + data_length + 1u) > size) return; 1211 // setup event 1212 uint8_t event_size = 10u + data_length; 1213 int pos = 0; 1214 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1215 event[pos++] = event_size; 1216 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1217 offset += 8; 1218 pos += 8; 1219 event[pos++] = packet[offset + 1 + data_length]; // rssi 1220 event[pos++] = data_length; 1221 offset++; 1222 (void)memcpy(&event[pos], &packet[offset], data_length); 1223 pos += data_length; 1224 offset += data_length + 1u; // rssi 1225 hci_emit_event(event, pos, 1); 1226 } 1227 } 1228 #endif 1229 #endif 1230 1231 #ifdef ENABLE_BLE 1232 #ifdef ENABLE_LE_PERIPHERAL 1233 static void hci_update_advertisements_enabled_for_current_roles(void){ 1234 if (hci_stack->le_advertisements_enabled){ 1235 // get number of active le slave connections 1236 int num_slave_connections = 0; 1237 btstack_linked_list_iterator_t it; 1238 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1239 while (btstack_linked_list_iterator_has_next(&it)){ 1240 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1241 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1242 if (con->state != OPEN) continue; 1243 if (con->role != HCI_ROLE_SLAVE) continue; 1244 if (!hci_is_le_connection(con)) continue; 1245 num_slave_connections++; 1246 } 1247 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1248 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1249 } else { 1250 hci_stack->le_advertisements_enabled_for_current_roles = false; 1251 } 1252 } 1253 #endif 1254 #endif 1255 1256 #ifdef ENABLE_CLASSIC 1257 static void gap_run_set_local_name(void){ 1258 hci_reserve_packet_buffer(); 1259 uint8_t * packet = hci_stack->hci_packet_buffer; 1260 // construct HCI Command and send 1261 uint16_t opcode = hci_write_local_name.opcode; 1262 hci_stack->last_cmd_opcode = opcode; 1263 packet[0] = opcode & 0xff; 1264 packet[1] = opcode >> 8; 1265 packet[2] = DEVICE_NAME_LEN; 1266 memset(&packet[3], 0, DEVICE_NAME_LEN); 1267 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1268 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1269 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1270 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1271 // expand '00:00:00:00:00:00' in name with bd_addr 1272 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1273 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1274 } 1275 1276 static void gap_run_set_eir_data(void){ 1277 hci_reserve_packet_buffer(); 1278 uint8_t * packet = hci_stack->hci_packet_buffer; 1279 // construct HCI Command in-place and send 1280 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1281 hci_stack->last_cmd_opcode = opcode; 1282 uint16_t offset = 0; 1283 packet[offset++] = opcode & 0xff; 1284 packet[offset++] = opcode >> 8; 1285 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1286 packet[offset++] = 0; // FEC not required 1287 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1288 if (hci_stack->eir_data){ 1289 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1290 ad_context_t context; 1291 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1292 uint8_t data_type = ad_iterator_get_data_type(&context); 1293 uint8_t size = ad_iterator_get_data_len(&context); 1294 const uint8_t *data = ad_iterator_get_data(&context); 1295 // copy item 1296 packet[offset++] = size + 1; 1297 packet[offset++] = data_type; 1298 memcpy(&packet[offset], data, size); 1299 // update name item 1300 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1301 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1302 } 1303 offset += size; 1304 } 1305 } else { 1306 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1307 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1308 packet[offset++] = bytes_to_copy + 1; 1309 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1310 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1311 // expand '00:00:00:00:00:00' in name with bd_addr 1312 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1313 } 1314 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1315 } 1316 1317 static void hci_run_gap_tasks_classic(void){ 1318 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1319 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1320 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1321 return; 1322 } 1323 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1324 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1325 gap_run_set_local_name(); 1326 return; 1327 } 1328 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1329 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1330 gap_run_set_eir_data(); 1331 return; 1332 } 1333 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1334 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1335 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1336 return; 1337 } 1338 // write page scan activity 1339 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1340 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1341 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1342 return; 1343 } 1344 // write page scan type 1345 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1346 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1347 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1348 return; 1349 } 1350 // send scan enable 1351 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1352 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1353 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1354 return; 1355 } 1356 } 1357 #endif 1358 1359 #ifndef HAVE_HOST_CONTROLLER_API 1360 1361 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1362 if (!hci_stack->config) return 0; 1363 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1364 // Limit baud rate for Broadcom chipsets to 3 mbps 1365 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1366 baud_rate = 3000000; 1367 } 1368 return baud_rate; 1369 } 1370 1371 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1372 UNUSED(ds); 1373 1374 switch (hci_stack->substate){ 1375 case HCI_INIT_W4_SEND_RESET: 1376 log_info("Resend HCI Reset"); 1377 hci_stack->substate = HCI_INIT_SEND_RESET; 1378 hci_stack->num_cmd_packets = 1; 1379 hci_run(); 1380 break; 1381 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1382 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1383 if (hci_stack->hci_transport->reset_link){ 1384 hci_stack->hci_transport->reset_link(); 1385 } 1386 1387 /* fall through */ 1388 1389 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1390 log_info("Resend HCI Reset - CSR Warm Boot"); 1391 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1392 hci_stack->num_cmd_packets = 1; 1393 hci_run(); 1394 break; 1395 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1396 if (hci_stack->hci_transport->set_baudrate){ 1397 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1398 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1399 hci_stack->hci_transport->set_baudrate(baud_rate); 1400 } 1401 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1402 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1403 if (hci_stack->hci_transport->reset_link){ 1404 log_info("Link Reset"); 1405 hci_stack->hci_transport->reset_link(); 1406 } 1407 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1408 hci_run(); 1409 } 1410 break; 1411 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1412 // otherwise continue 1413 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1414 hci_send_cmd(&hci_read_local_supported_commands); 1415 break; 1416 default: 1417 break; 1418 } 1419 } 1420 #endif 1421 1422 static void hci_initializing_next_state(void){ 1423 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1424 } 1425 1426 // assumption: hci_can_send_command_packet_now() == true 1427 static void hci_initializing_run(void){ 1428 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1429 switch (hci_stack->substate){ 1430 case HCI_INIT_SEND_RESET: 1431 hci_state_reset(); 1432 1433 #ifndef HAVE_HOST_CONTROLLER_API 1434 // prepare reset if command complete not received in 100ms 1435 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1436 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1437 btstack_run_loop_add_timer(&hci_stack->timeout); 1438 #endif 1439 // send command 1440 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1441 hci_send_cmd(&hci_reset); 1442 break; 1443 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1444 hci_send_cmd(&hci_read_local_version_information); 1445 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1446 break; 1447 case HCI_INIT_SEND_READ_LOCAL_NAME: 1448 hci_send_cmd(&hci_read_local_name); 1449 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1450 break; 1451 1452 #ifndef HAVE_HOST_CONTROLLER_API 1453 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1454 hci_state_reset(); 1455 // prepare reset if command complete not received in 100ms 1456 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1457 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1458 btstack_run_loop_add_timer(&hci_stack->timeout); 1459 // send command 1460 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1461 hci_send_cmd(&hci_reset); 1462 break; 1463 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1464 hci_state_reset(); 1465 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1466 hci_send_cmd(&hci_reset); 1467 break; 1468 case HCI_INIT_SEND_BAUD_CHANGE: { 1469 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1470 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1471 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1472 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1473 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1474 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1475 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1476 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1477 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1478 btstack_run_loop_add_timer(&hci_stack->timeout); 1479 } 1480 break; 1481 } 1482 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1483 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1484 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1485 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1486 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1487 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1488 break; 1489 } 1490 case HCI_INIT_CUSTOM_INIT: 1491 // Custom initialization 1492 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1493 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1494 bool send_cmd = false; 1495 switch (hci_stack->chipset_result){ 1496 case BTSTACK_CHIPSET_VALID_COMMAND: 1497 send_cmd = true; 1498 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1499 break; 1500 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1501 send_cmd = true; 1502 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1503 log_info("CSR Warm Boot"); 1504 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1505 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1506 btstack_run_loop_add_timer(&hci_stack->timeout); 1507 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1508 && hci_stack->config 1509 && hci_stack->chipset 1510 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1511 && hci_stack->hci_transport->set_baudrate 1512 && hci_transport_uart_get_main_baud_rate()){ 1513 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1514 } else { 1515 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1516 } 1517 break; 1518 default: 1519 break; 1520 } 1521 1522 if (send_cmd){ 1523 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1524 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1525 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1526 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1527 break; 1528 } 1529 log_info("Init script done"); 1530 1531 // Init script download on Broadcom chipsets causes: 1532 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1533 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1534 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1535 1536 // - baud rate to reset, restore UART baud rate if needed 1537 int need_baud_change = hci_stack->config 1538 && hci_stack->chipset 1539 && hci_stack->chipset->set_baudrate_command 1540 && hci_stack->hci_transport->set_baudrate 1541 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1542 if (need_baud_change) { 1543 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1544 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1545 hci_stack->hci_transport->set_baudrate(baud_rate); 1546 } 1547 1548 uint16_t bcm_delay_ms = 300; 1549 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1550 // -> Work around: wait here. 1551 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1552 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1553 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1554 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1555 btstack_run_loop_add_timer(&hci_stack->timeout); 1556 break; 1557 } 1558 } 1559 // otherwise continue 1560 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1561 hci_send_cmd(&hci_read_local_supported_commands); 1562 break; 1563 case HCI_INIT_SET_BD_ADDR: 1564 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1565 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1566 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1567 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1568 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1569 break; 1570 #endif 1571 1572 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1573 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1574 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1575 hci_send_cmd(&hci_read_local_supported_commands); 1576 break; 1577 case HCI_INIT_READ_BD_ADDR: 1578 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1579 hci_send_cmd(&hci_read_bd_addr); 1580 break; 1581 case HCI_INIT_READ_BUFFER_SIZE: 1582 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1583 hci_send_cmd(&hci_read_buffer_size); 1584 break; 1585 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1586 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1587 hci_send_cmd(&hci_read_local_supported_features); 1588 break; 1589 1590 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1591 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1592 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1593 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1594 break; 1595 case HCI_INIT_HOST_BUFFER_SIZE: 1596 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1597 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1598 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1599 break; 1600 #endif 1601 1602 case HCI_INIT_SET_EVENT_MASK: 1603 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1604 if (hci_le_supported()){ 1605 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1606 } else { 1607 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1608 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1609 } 1610 break; 1611 1612 #ifdef ENABLE_CLASSIC 1613 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1614 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1615 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1616 break; 1617 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1618 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1619 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1620 break; 1621 case HCI_INIT_WRITE_INQUIRY_MODE: 1622 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1623 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1624 break; 1625 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1626 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1627 hci_stack->secure_connections_active = true; 1628 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1629 break; 1630 // only sent if ENABLE_SCO_OVER_HCI is defined 1631 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1632 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1633 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1634 break; 1635 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1636 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1637 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1638 break; 1639 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1640 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1641 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1642 #ifdef ENABLE_SCO_OVER_HCI 1643 log_info("BCM: Route SCO data via HCI transport"); 1644 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1645 #endif 1646 #ifdef ENABLE_SCO_OVER_PCM 1647 log_info("BCM: Route SCO data via PCM interface"); 1648 #ifdef ENABLE_BCM_PCM_WBS 1649 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1650 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1651 #else 1652 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1653 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1654 #endif 1655 #endif 1656 break; 1657 #ifdef ENABLE_SCO_OVER_PCM 1658 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1659 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1660 log_info("BCM: Config PCM interface for I2S"); 1661 #ifdef ENABLE_BCM_PCM_WBS 1662 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1663 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1664 #else 1665 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1666 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1667 #endif 1668 break; 1669 #endif 1670 #endif 1671 1672 #ifdef ENABLE_BLE 1673 // LE INIT 1674 case HCI_INIT_LE_READ_BUFFER_SIZE: 1675 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1676 hci_send_cmd(&hci_le_read_buffer_size); 1677 break; 1678 case HCI_INIT_LE_SET_EVENT_MASK: 1679 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1680 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1681 break; 1682 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1683 // LE Supported Host = 1, Simultaneous Host = 0 1684 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1685 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1686 break; 1687 #endif 1688 1689 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1690 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1691 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1692 hci_send_cmd(&hci_le_read_maximum_data_length); 1693 break; 1694 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1695 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1696 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1697 break; 1698 #endif 1699 1700 #ifdef ENABLE_LE_CENTRAL 1701 case HCI_INIT_READ_WHITE_LIST_SIZE: 1702 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1703 hci_send_cmd(&hci_le_read_white_list_size); 1704 break; 1705 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1706 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1707 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 1708 break; 1709 #endif 1710 default: 1711 return; 1712 } 1713 } 1714 1715 static void hci_init_done(void){ 1716 #ifdef ENABLE_CLASSIC 1717 // init sequence complete, check if GAP Tasks are completed 1718 if (hci_stack->gap_tasks != 0) { 1719 hci_run_gap_tasks_classic(); 1720 return; 1721 } 1722 #endif 1723 1724 // done. tell the app 1725 log_info("hci_init_done -> HCI_STATE_WORKING"); 1726 hci_stack->state = HCI_STATE_WORKING; 1727 hci_emit_state(); 1728 hci_run(); 1729 } 1730 1731 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1732 bool command_completed = false; 1733 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1734 uint16_t opcode = little_endian_read_16(packet,3); 1735 if (opcode == hci_stack->last_cmd_opcode){ 1736 command_completed = true; 1737 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1738 } else { 1739 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1740 } 1741 } 1742 1743 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1744 uint8_t status = packet[2]; 1745 uint16_t opcode = little_endian_read_16(packet,4); 1746 if (opcode == hci_stack->last_cmd_opcode){ 1747 if (status){ 1748 command_completed = true; 1749 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1750 } else { 1751 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1752 } 1753 } else { 1754 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1755 } 1756 } 1757 #ifndef HAVE_HOST_CONTROLLER_API 1758 // Vendor == CSR 1759 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1760 // TODO: track actual command 1761 command_completed = true; 1762 } 1763 1764 // Vendor == Toshiba 1765 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1766 // TODO: track actual command 1767 command_completed = true; 1768 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1769 hci_stack->num_cmd_packets = 1; 1770 } 1771 #endif 1772 1773 return command_completed; 1774 } 1775 1776 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1777 1778 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1779 1780 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1781 1782 #ifndef HAVE_HOST_CONTROLLER_API 1783 1784 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1785 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1786 // 1787 // HCI Reset 1788 // Timeout 100 ms 1789 // HCI Reset 1790 // Command Complete Reset 1791 // HCI Read Local Version Information 1792 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1793 // hang... 1794 // 1795 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1796 if (!command_completed 1797 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1798 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1799 1800 uint16_t opcode = little_endian_read_16(packet,3); 1801 if (opcode == hci_reset.opcode){ 1802 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1803 return; 1804 } 1805 } 1806 1807 // CSR & H5 1808 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1809 if (!command_completed 1810 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1811 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1812 1813 uint16_t opcode = little_endian_read_16(packet,3); 1814 if (opcode == hci_reset.opcode){ 1815 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1816 return; 1817 } 1818 } 1819 1820 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1821 // fix: Correct substate and behave as command below 1822 if (command_completed){ 1823 switch (hci_stack->substate){ 1824 case HCI_INIT_SEND_RESET: 1825 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1826 break; 1827 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1828 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1829 break; 1830 default: 1831 break; 1832 } 1833 } 1834 1835 #endif 1836 1837 if (!command_completed) return; 1838 1839 bool need_baud_change = false; 1840 bool need_addr_change = false; 1841 1842 #ifndef HAVE_HOST_CONTROLLER_API 1843 need_baud_change = hci_stack->config 1844 && hci_stack->chipset 1845 && hci_stack->chipset->set_baudrate_command 1846 && hci_stack->hci_transport->set_baudrate 1847 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1848 1849 need_addr_change = hci_stack->custom_bd_addr_set 1850 && hci_stack->chipset 1851 && hci_stack->chipset->set_bd_addr_command; 1852 #endif 1853 1854 switch(hci_stack->substate){ 1855 1856 #ifndef HAVE_HOST_CONTROLLER_API 1857 case HCI_INIT_SEND_RESET: 1858 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1859 // fix: just correct substate and behave as command below 1860 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1861 btstack_run_loop_remove_timer(&hci_stack->timeout); 1862 break; 1863 case HCI_INIT_W4_SEND_RESET: 1864 btstack_run_loop_remove_timer(&hci_stack->timeout); 1865 break; 1866 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1867 log_info("Received local name, need baud change %d", (int) need_baud_change); 1868 if (need_baud_change){ 1869 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1870 return; 1871 } 1872 // skip baud change 1873 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1874 return; 1875 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1876 // for STLC2500D, baud rate change already happened. 1877 // for others, baud rate gets changed now 1878 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1879 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1880 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1881 hci_stack->hci_transport->set_baudrate(baud_rate); 1882 } 1883 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1884 return; 1885 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1886 btstack_run_loop_remove_timer(&hci_stack->timeout); 1887 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1888 return; 1889 case HCI_INIT_W4_CUSTOM_INIT: 1890 // repeat custom init 1891 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1892 return; 1893 #else 1894 case HCI_INIT_W4_SEND_RESET: 1895 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1896 return ; 1897 #endif 1898 1899 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1900 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1901 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1902 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1903 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1904 return; 1905 } 1906 if (need_addr_change){ 1907 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1908 return; 1909 } 1910 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1911 return; 1912 #ifndef HAVE_HOST_CONTROLLER_API 1913 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1914 if (need_baud_change){ 1915 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1916 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1917 hci_stack->hci_transport->set_baudrate(baud_rate); 1918 } 1919 if (need_addr_change){ 1920 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1921 return; 1922 } 1923 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1924 return; 1925 case HCI_INIT_W4_SET_BD_ADDR: 1926 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1927 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1928 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1929 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1930 return; 1931 } 1932 // skipping st warm boot 1933 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1934 return; 1935 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1936 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1937 return; 1938 #endif 1939 case HCI_INIT_W4_READ_BD_ADDR: 1940 // only read buffer size if supported 1941 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1942 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1943 return; 1944 } 1945 // skipping read buffer size 1946 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1947 return; 1948 case HCI_INIT_W4_SET_EVENT_MASK: 1949 // skip Classic init commands for LE only chipsets 1950 if (!hci_classic_supported()){ 1951 #ifdef ENABLE_BLE 1952 if (hci_le_supported()){ 1953 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1954 return; 1955 } 1956 #endif 1957 log_error("Neither BR/EDR nor LE supported"); 1958 hci_init_done(); 1959 return; 1960 } 1961 if (!gap_ssp_supported()){ 1962 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1963 return; 1964 } 1965 break; 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 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1993 // skip write secure connections host support if not supported or disabled 1994 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1995 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1996 return; 1997 } 1998 break; 1999 2000 #ifdef ENABLE_SCO_OVER_HCI 2001 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 2002 // skip write synchronous flow control if not supported 2003 if (hci_stack->local_supported_commands[0] & 0x04) break; 2004 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 2005 2006 /* fall through */ 2007 2008 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2009 // skip write default erroneous data reporting if not supported 2010 if (hci_stack->local_supported_commands[0] & 0x08) break; 2011 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 2012 2013 /* fall through */ 2014 2015 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 2016 // skip bcm set sco pcm config on non-Broadcom chipsets 2017 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 2018 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2019 2020 /* fall through */ 2021 2022 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 2023 if (!hci_le_supported()){ 2024 // SKIP LE init for Classic only configuration 2025 hci_init_done(); 2026 return; 2027 } 2028 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2029 break; 2030 2031 #else /* !ENABLE_SCO_OVER_HCI */ 2032 2033 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 2034 #ifdef ENABLE_SCO_OVER_PCM 2035 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 2036 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 2037 return; 2038 } 2039 #endif 2040 /* fall through */ 2041 2042 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2043 #ifdef ENABLE_BLE 2044 if (hci_le_supported()){ 2045 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 2046 return; 2047 } 2048 #endif 2049 // SKIP LE init for Classic only configuration 2050 hci_init_done(); 2051 return; 2052 #endif /* ENABLE_SCO_OVER_HCI */ 2053 2054 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 2055 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 2056 // Response to command before init done state -> init done 2057 case (HCI_INIT_DONE-1): 2058 hci_init_done(); 2059 return; 2060 #endif 2061 2062 default: 2063 break; 2064 } 2065 hci_initializing_next_state(); 2066 } 2067 2068 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2069 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2070 bd_addr_t bd_address; 2071 (void)memcpy(&bd_address, conn->address, 6); 2072 2073 #ifdef ENABLE_CLASSIC 2074 // cache needed data 2075 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2076 #endif 2077 2078 // connection failed, remove entry 2079 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2080 btstack_memory_hci_connection_free( conn ); 2081 2082 #ifdef ENABLE_CLASSIC 2083 // notify client if dedicated bonding 2084 if (notify_dedicated_bonding_failed){ 2085 log_info("hci notify_dedicated_bonding_failed"); 2086 hci_emit_dedicated_bonding_result(bd_address, status); 2087 } 2088 2089 // if authentication error, also delete link key 2090 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2091 gap_drop_link_key_for_bd_addr(bd_address); 2092 } 2093 #else 2094 UNUSED(status); 2095 #endif 2096 } 2097 2098 #ifdef ENABLE_CLASSIC 2099 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2100 // SSP Controller 2101 if (features[6] & (1 << 3)){ 2102 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2103 } 2104 // eSCO 2105 if (features[3] & (1<<7)){ 2106 conn->remote_supported_features[0] |= 1; 2107 } 2108 // Extended features 2109 if (features[7] & (1<<7)){ 2110 conn->remote_supported_features[0] |= 2; 2111 } 2112 } 2113 2114 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2115 // SSP Host 2116 if (features[0] & (1 << 0)){ 2117 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2118 } 2119 // SC Host 2120 if (features[0] & (1 << 3)){ 2121 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2122 } 2123 } 2124 2125 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2126 // SC Controller 2127 if (features[1] & (1 << 0)){ 2128 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2129 } 2130 } 2131 2132 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2133 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2134 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2135 if (conn->bonding_flags & BONDING_DEDICATED){ 2136 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2137 } 2138 } 2139 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2140 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2141 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2142 } 2143 2144 #endif 2145 2146 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2147 // handle BT initialization 2148 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2149 hci_initializing_event_handler(packet, size); 2150 } 2151 2152 // help with BT sleep 2153 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2154 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2155 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2156 hci_initializing_next_state(); 2157 } 2158 } 2159 2160 #ifdef ENABLE_CLASSIC 2161 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2162 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2163 conn->encryption_key_size = encryption_key_size; 2164 2165 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2166 conn->requested_security_level = LEVEL_0; 2167 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2168 return; 2169 } 2170 2171 // Request Authentication if not already done 2172 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2173 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2174 } 2175 #endif 2176 2177 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2178 UNUSED(size); 2179 2180 uint16_t manufacturer; 2181 #ifdef ENABLE_CLASSIC 2182 hci_con_handle_t handle; 2183 hci_connection_t * conn; 2184 uint8_t status; 2185 #endif 2186 // get num cmd packets - limit to 1 to reduce complexity 2187 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2188 2189 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2190 switch (opcode){ 2191 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2192 if (packet[5]) break; 2193 // terminate, name 248 chars 2194 packet[6+248] = 0; 2195 log_info("local name: %s", &packet[6]); 2196 break; 2197 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2198 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2199 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2200 uint16_t acl_len = little_endian_read_16(packet, 6); 2201 uint16_t sco_len = packet[8]; 2202 2203 // determine usable ACL/SCO payload size 2204 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2205 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2206 2207 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2208 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2209 2210 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2211 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2212 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2213 } 2214 break; 2215 case HCI_OPCODE_HCI_READ_RSSI: 2216 if (packet[5] == ERROR_CODE_SUCCESS){ 2217 uint8_t event[5]; 2218 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2219 event[1] = 3; 2220 (void)memcpy(&event[2], &packet[6], 3); 2221 hci_emit_event(event, sizeof(event), 1); 2222 } 2223 break; 2224 #ifdef ENABLE_BLE 2225 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2226 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2227 hci_stack->le_acl_packets_total_num = packet[8]; 2228 // determine usable ACL payload size 2229 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2230 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2231 } 2232 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2233 break; 2234 #endif 2235 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2236 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2237 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2238 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2239 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); 2240 break; 2241 #endif 2242 #ifdef ENABLE_LE_CENTRAL 2243 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2244 hci_stack->le_whitelist_capacity = packet[6]; 2245 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2246 break; 2247 #endif 2248 case HCI_OPCODE_HCI_READ_BD_ADDR: 2249 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2250 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)); 2251 #ifdef ENABLE_CLASSIC 2252 if (hci_stack->link_key_db){ 2253 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2254 } 2255 #endif 2256 break; 2257 #ifdef ENABLE_CLASSIC 2258 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2259 hci_emit_discoverable_enabled(hci_stack->discoverable); 2260 break; 2261 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2262 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2263 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2264 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2265 hci_emit_event(event, sizeof(event), 1); 2266 } 2267 break; 2268 #endif 2269 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2270 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2271 2272 #ifdef ENABLE_CLASSIC 2273 // determine usable ACL packet types based on host buffer size and supported features 2274 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2275 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2276 #endif 2277 // Classic/LE 2278 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2279 break; 2280 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2281 manufacturer = little_endian_read_16(packet, 10); 2282 // map Cypress to Broadcom 2283 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2284 log_info("Treat Cypress as Broadcom"); 2285 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2286 little_endian_store_16(packet, 10, manufacturer); 2287 } 2288 hci_stack->manufacturer = manufacturer; 2289 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2290 break; 2291 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2292 hci_stack->local_supported_commands[0] = 2293 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2294 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2295 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2296 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2297 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2298 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2299 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2300 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2301 hci_stack->local_supported_commands[1] = 2302 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2303 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2304 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2305 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2306 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2307 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2308 break; 2309 #ifdef ENABLE_CLASSIC 2310 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2311 if (packet[5]) return; 2312 hci_stack->synchronous_flow_control_enabled = 1; 2313 break; 2314 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2315 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2316 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2317 conn = hci_connection_for_handle(handle); 2318 if (conn != NULL) { 2319 uint8_t key_size = 0; 2320 if (status == 0){ 2321 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2322 log_info("Handle %04x key Size: %u", handle, key_size); 2323 } else { 2324 key_size = 1; 2325 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2326 } 2327 hci_handle_read_encryption_key_size_complete(conn, key_size); 2328 } 2329 break; 2330 // assert pairing complete event is emitted. 2331 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2332 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2333 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2334 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2335 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2336 // lookup connection by gap pairing addr 2337 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2338 if (conn == NULL) break; 2339 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2340 break; 2341 2342 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2343 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2344 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2345 uint8_t event[67]; 2346 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2347 event[1] = 65; 2348 (void)memset(&event[2], 0, 65); 2349 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2350 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2351 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2352 event[2] = 3; 2353 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2354 } else { 2355 event[2] = 1; 2356 } 2357 } 2358 hci_emit_event(event, sizeof(event), 0); 2359 break; 2360 } 2361 2362 // note: only needed if user does not provide OOB data 2363 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2364 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2365 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2366 if (conn == NULL) break; 2367 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2368 break; 2369 #endif 2370 #endif 2371 default: 2372 break; 2373 } 2374 } 2375 2376 #ifdef ENABLE_BLE 2377 static void event_handle_le_connection_complete(const uint8_t * packet){ 2378 bd_addr_t addr; 2379 bd_addr_type_t addr_type; 2380 hci_connection_t * conn; 2381 2382 // Connection management 2383 reverse_bd_addr(&packet[8], addr); 2384 addr_type = (bd_addr_type_t)packet[7]; 2385 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2386 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2387 2388 #ifdef ENABLE_LE_CENTRAL 2389 // handle error: error is reported only to the initiator -> outgoing connection 2390 if (packet[3]){ 2391 2392 // handle cancelled outgoing connection 2393 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2394 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2395 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2396 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2397 // reset state 2398 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2399 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2400 // get outgoing connection conn struct for direct connect 2401 conn = gap_get_outgoing_connection(); 2402 } 2403 2404 // outgoing le connection establishment is done 2405 if (conn){ 2406 // remove entry 2407 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2408 btstack_memory_hci_connection_free( conn ); 2409 } 2410 return; 2411 } 2412 #endif 2413 2414 // on success, both hosts receive connection complete event 2415 if (packet[6] == HCI_ROLE_MASTER){ 2416 #ifdef ENABLE_LE_CENTRAL 2417 // if we're master on an le connection, it was an outgoing connection and we're done with it 2418 // note: no hci_connection_t object exists yet for connect with whitelist 2419 if (hci_is_le_connection_type(addr_type)){ 2420 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2421 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2422 } 2423 #endif 2424 } else { 2425 #ifdef ENABLE_LE_PERIPHERAL 2426 // if we're slave, it was an incoming connection, advertisements have stopped 2427 hci_stack->le_advertisements_active = false; 2428 #endif 2429 } 2430 2431 // LE connections are auto-accepted, so just create a connection if there isn't one already 2432 if (!conn){ 2433 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2434 } 2435 2436 // no memory, sorry. 2437 if (!conn){ 2438 return; 2439 } 2440 2441 conn->state = OPEN; 2442 conn->role = packet[6]; 2443 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2444 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2445 2446 #ifdef ENABLE_LE_PERIPHERAL 2447 if (packet[6] == HCI_ROLE_SLAVE){ 2448 hci_update_advertisements_enabled_for_current_roles(); 2449 } 2450 #endif 2451 2452 // init unenhanced att bearer mtu 2453 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2454 conn->att_connection.mtu_exchanged = false; 2455 2456 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2457 2458 // restart timer 2459 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2460 // btstack_run_loop_add_timer(&conn->timeout); 2461 2462 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2463 2464 hci_emit_nr_connections_changed(); 2465 } 2466 #endif 2467 2468 #ifdef ENABLE_CLASSIC 2469 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){ 2470 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2471 // LEVEL_4 is tested by l2cap 2472 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2473 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2474 if (level >= LEVEL_3){ 2475 // MITM not possible without keyboard or display 2476 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2477 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2478 2479 // MITM possible if one side has keyboard and the other has keyboard or display 2480 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2481 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2482 2483 // MITM not possible if one side has only display and other side has no keyboard 2484 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2485 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2486 } 2487 // LEVEL 2 requires SSP, which is a given 2488 return true; 2489 } 2490 2491 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2492 uint16_t i; 2493 for (i=0; i < size ; i++){ 2494 if (data[i] != 0) { 2495 return false; 2496 } 2497 } 2498 return true; 2499 } 2500 2501 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2502 // get requested security level 2503 gap_security_level_t requested_security_level = conn->requested_security_level; 2504 if (hci_stack->gap_secure_connections_only_mode){ 2505 requested_security_level = LEVEL_4; 2506 } 2507 2508 // assess security: LEVEL 4 requires SC 2509 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2510 if ((requested_security_level == LEVEL_4) && 2511 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2512 !hci_remote_sc_enabled(conn)){ 2513 log_info("Level 4 required, but SC not supported -> abort"); 2514 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2515 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2516 return; 2517 } 2518 2519 // assess security based on io capabilities 2520 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2521 // responder: fully validate io caps of both sides as well as OOB data 2522 bool security_possible = false; 2523 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2524 2525 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2526 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2527 // so we merge the OOB data availability 2528 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2529 if (conn->classic_oob_c_192 != NULL){ 2530 have_oob_data |= 1; 2531 } 2532 if (conn->classic_oob_c_256 != NULL){ 2533 have_oob_data |= 2; 2534 } 2535 // for up to Level 3, either P-192 as well as P-256 will do 2536 // 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 2537 // if remote does not SC, we should not receive P-256 data either 2538 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2539 security_possible = true; 2540 } 2541 // for Level 4, P-256 is needed 2542 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2543 security_possible = true; 2544 } 2545 #endif 2546 2547 if (security_possible == false){ 2548 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2549 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2550 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2551 return; 2552 } 2553 } else { 2554 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2555 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2556 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2557 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2558 log_info("Level 3+ required, but no input/output -> abort"); 2559 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2560 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2561 return; 2562 } 2563 #endif 2564 #endif 2565 } 2566 2567 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2568 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2569 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2570 } else { 2571 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2572 } 2573 #endif 2574 } 2575 2576 #endif 2577 2578 static void event_handler(uint8_t *packet, uint16_t size){ 2579 2580 uint16_t event_length = packet[1]; 2581 2582 // assert packet is complete 2583 if (size != (event_length + 2u)){ 2584 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2585 return; 2586 } 2587 2588 bd_addr_type_t addr_type; 2589 hci_con_handle_t handle; 2590 hci_connection_t * conn; 2591 int i; 2592 int create_connection_cmd; 2593 2594 #ifdef ENABLE_CLASSIC 2595 hci_link_type_t link_type; 2596 bd_addr_t addr; 2597 #endif 2598 2599 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2600 2601 switch (hci_event_packet_get_type(packet)) { 2602 2603 case HCI_EVENT_COMMAND_COMPLETE: 2604 handle_command_complete_event(packet, size); 2605 break; 2606 2607 case HCI_EVENT_COMMAND_STATUS: 2608 // get num cmd packets - limit to 1 to reduce complexity 2609 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2610 2611 // check command status to detected failed outgoing connections 2612 create_connection_cmd = 0; 2613 #ifdef ENABLE_CLASSIC 2614 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2615 create_connection_cmd = 1; 2616 } 2617 #endif 2618 #ifdef ENABLE_LE_CENTRAL 2619 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2620 create_connection_cmd = 1; 2621 } 2622 #endif 2623 if (create_connection_cmd) { 2624 uint8_t status = hci_event_command_status_get_status(packet); 2625 addr_type = hci_stack->outgoing_addr_type; 2626 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2627 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); 2628 2629 // reset outgoing address info 2630 memset(hci_stack->outgoing_addr, 0, 6); 2631 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2632 2633 // on error 2634 if (status != ERROR_CODE_SUCCESS){ 2635 #ifdef ENABLE_LE_CENTRAL 2636 if (hci_is_le_connection_type(addr_type)){ 2637 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2638 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2639 } 2640 #endif 2641 // error => outgoing connection failed 2642 if (conn != NULL){ 2643 hci_handle_connection_failed(conn, status); 2644 } 2645 } 2646 } 2647 2648 #ifdef ENABLE_CLASSIC 2649 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2650 uint8_t status = hci_event_command_status_get_status(packet); 2651 log_info("command status (inquiry), status %x", status); 2652 if (status == ERROR_CODE_SUCCESS) { 2653 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2654 } else { 2655 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2656 } 2657 } 2658 #endif 2659 break; 2660 2661 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2662 if (size < 3) return; 2663 uint16_t num_handles = packet[2]; 2664 if (size != (3u + num_handles * 4u)) return; 2665 uint16_t offset = 3; 2666 for (i=0; i<num_handles;i++){ 2667 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2668 offset += 2u; 2669 uint16_t num_packets = little_endian_read_16(packet, offset); 2670 offset += 2u; 2671 2672 conn = hci_connection_for_handle(handle); 2673 if (!conn){ 2674 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2675 continue; 2676 } 2677 2678 if (conn->num_packets_sent >= num_packets){ 2679 conn->num_packets_sent -= num_packets; 2680 } else { 2681 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2682 conn->num_packets_sent = 0; 2683 } 2684 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2685 2686 #ifdef ENABLE_CLASSIC 2687 // For SCO, we do the can_send_now_check here 2688 hci_notify_if_sco_can_send_now(); 2689 #endif 2690 } 2691 break; 2692 } 2693 2694 #ifdef ENABLE_CLASSIC 2695 case HCI_EVENT_INQUIRY_COMPLETE: 2696 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2697 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2698 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2699 hci_emit_event(event, sizeof(event), 1); 2700 } 2701 break; 2702 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2703 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2704 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2705 } 2706 break; 2707 case HCI_EVENT_CONNECTION_REQUEST: 2708 reverse_bd_addr(&packet[2], addr); 2709 link_type = (hci_link_type_t) packet[11]; 2710 2711 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2712 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2713 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2714 bd_addr_copy(hci_stack->decline_addr, addr); 2715 break; 2716 } 2717 2718 if (hci_stack->gap_classic_accept_callback != NULL){ 2719 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2720 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2721 bd_addr_copy(hci_stack->decline_addr, addr); 2722 break; 2723 } 2724 } 2725 2726 // TODO: eval COD 8-10 2727 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2728 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2729 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2730 if (!conn) { 2731 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2732 } 2733 if (!conn) { 2734 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2735 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2736 bd_addr_copy(hci_stack->decline_addr, addr); 2737 break; 2738 } 2739 conn->role = HCI_ROLE_SLAVE; 2740 conn->state = RECEIVED_CONNECTION_REQUEST; 2741 // store info about eSCO 2742 if (link_type == HCI_LINK_TYPE_ESCO){ 2743 conn->remote_supported_features[0] |= 1; 2744 } 2745 hci_run(); 2746 break; 2747 2748 case HCI_EVENT_CONNECTION_COMPLETE: 2749 // Connection management 2750 reverse_bd_addr(&packet[5], addr); 2751 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2752 addr_type = BD_ADDR_TYPE_ACL; 2753 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2754 if (conn) { 2755 if (!packet[2]){ 2756 conn->state = OPEN; 2757 conn->con_handle = little_endian_read_16(packet, 3); 2758 2759 // queue get remote feature 2760 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2761 2762 // queue set supervision timeout if we're master 2763 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2764 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2765 } 2766 2767 // restart timer 2768 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2769 btstack_run_loop_add_timer(&conn->timeout); 2770 2771 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2772 2773 hci_emit_nr_connections_changed(); 2774 } else { 2775 // connection failed 2776 hci_handle_connection_failed(conn, packet[2]); 2777 } 2778 } 2779 break; 2780 2781 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2782 reverse_bd_addr(&packet[5], addr); 2783 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2784 if (packet[2]){ 2785 // connection failed 2786 break; 2787 } 2788 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2789 if (!conn) { 2790 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2791 } 2792 if (!conn) { 2793 break; 2794 } 2795 conn->state = OPEN; 2796 conn->con_handle = little_endian_read_16(packet, 3); 2797 2798 #ifdef ENABLE_SCO_OVER_HCI 2799 // update SCO 2800 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2801 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2802 } 2803 // trigger can send now 2804 if (hci_have_usb_transport()){ 2805 hci_stack->sco_can_send_now = true; 2806 } 2807 #endif 2808 #ifdef HAVE_SCO_TRANSPORT 2809 // configure sco transport 2810 if (hci_stack->sco_transport != NULL){ 2811 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2812 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2813 } 2814 #endif 2815 break; 2816 2817 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2818 handle = little_endian_read_16(packet, 3); 2819 conn = hci_connection_for_handle(handle); 2820 if (!conn) break; 2821 if (!packet[2]){ 2822 const uint8_t * features = &packet[5]; 2823 hci_handle_remote_features_page_0(conn, features); 2824 2825 // read extended features if possible 2826 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2827 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2828 break; 2829 } 2830 } 2831 hci_handle_remote_features_received(conn); 2832 break; 2833 2834 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2835 handle = little_endian_read_16(packet, 3); 2836 conn = hci_connection_for_handle(handle); 2837 if (!conn) break; 2838 // status = ok, page = 1 2839 if (!packet[2]) { 2840 uint8_t page_number = packet[5]; 2841 uint8_t maximum_page_number = packet[6]; 2842 const uint8_t * features = &packet[7]; 2843 bool done = false; 2844 switch (page_number){ 2845 case 1: 2846 hci_handle_remote_features_page_1(conn, features); 2847 if (maximum_page_number >= 2){ 2848 // get Secure Connections (Controller) from Page 2 if available 2849 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2850 } else { 2851 // otherwise, assume SC (Controller) == SC (Host) 2852 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2853 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2854 } 2855 done = true; 2856 } 2857 break; 2858 case 2: 2859 hci_handle_remote_features_page_2(conn, features); 2860 done = true; 2861 break; 2862 default: 2863 break; 2864 } 2865 if (!done) break; 2866 } 2867 hci_handle_remote_features_received(conn); 2868 break; 2869 2870 case HCI_EVENT_LINK_KEY_REQUEST: 2871 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2872 hci_event_link_key_request_get_bd_addr(packet, addr); 2873 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2874 if (!conn) break; 2875 2876 // lookup link key in db if not cached 2877 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2878 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2879 } 2880 2881 // response sent by hci_run() 2882 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2883 #endif 2884 break; 2885 2886 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2887 hci_event_link_key_request_get_bd_addr(packet, addr); 2888 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2889 if (!conn) break; 2890 2891 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2892 2893 // CVE-2020-26555: ignore NULL link key 2894 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2895 if (btstack_is_null(&packet[8], 16)) break; 2896 2897 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2898 // Change Connection Encryption keeps link key type 2899 if (link_key_type != CHANGED_COMBINATION_KEY){ 2900 conn->link_key_type = link_key_type; 2901 } 2902 2903 // cache link key. link keys stored in little-endian format for legacy reasons 2904 memcpy(&conn->link_key, &packet[8], 16); 2905 2906 // only store link key: 2907 // - if bondable enabled 2908 if (hci_stack->bondable == false) break; 2909 // - if security level sufficient 2910 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2911 // - for SSP, also check if remote side requested bonding as well 2912 if (conn->link_key_type != COMBINATION_KEY){ 2913 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2914 if (!remote_bonding){ 2915 break; 2916 } 2917 } 2918 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2919 break; 2920 } 2921 2922 case HCI_EVENT_PIN_CODE_REQUEST: 2923 hci_event_pin_code_request_get_bd_addr(packet, addr); 2924 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2925 if (!conn) break; 2926 2927 hci_pairing_started(conn, false); 2928 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2929 if (!hci_stack->bondable ){ 2930 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2931 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2932 hci_run(); 2933 return; 2934 } 2935 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2936 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2937 log_info("Level 4 required, but SC not supported -> abort"); 2938 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2939 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2940 hci_run(); 2941 return; 2942 } 2943 break; 2944 2945 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2946 hci_event_io_capability_response_get_bd_addr(packet, addr); 2947 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2948 if (!conn) break; 2949 2950 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2951 hci_pairing_started(conn, true); 2952 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2953 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2954 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2955 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2956 #endif 2957 break; 2958 2959 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2960 hci_event_io_capability_response_get_bd_addr(packet, addr); 2961 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2962 if (!conn) break; 2963 2964 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2965 hci_connection_timestamp(conn); 2966 hci_pairing_started(conn, true); 2967 break; 2968 2969 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2970 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2971 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2972 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2973 if (!conn) break; 2974 2975 hci_connection_timestamp(conn); 2976 2977 hci_pairing_started(conn, true); 2978 2979 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2980 break; 2981 #endif 2982 2983 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2984 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2985 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2986 if (!conn) break; 2987 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2988 if (hci_stack->ssp_auto_accept){ 2989 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2990 }; 2991 } else { 2992 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2993 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2994 // don't forward event to app 2995 hci_run(); 2996 return; 2997 } 2998 break; 2999 3000 case HCI_EVENT_USER_PASSKEY_REQUEST: 3001 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3002 if (hci_stack->ssp_auto_accept){ 3003 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3004 }; 3005 break; 3006 3007 case HCI_EVENT_MODE_CHANGE: 3008 handle = hci_event_mode_change_get_handle(packet); 3009 conn = hci_connection_for_handle(handle); 3010 if (!conn) break; 3011 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3012 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3013 break; 3014 #endif 3015 3016 case HCI_EVENT_ENCRYPTION_CHANGE: 3017 handle = hci_event_encryption_change_get_connection_handle(packet); 3018 conn = hci_connection_for_handle(handle); 3019 if (!conn) break; 3020 if (hci_event_encryption_change_get_status(packet) == 0u) { 3021 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3022 if (encryption_enabled){ 3023 if (hci_is_le_connection(conn)){ 3024 // For LE, we accept connection as encrypted 3025 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3026 } 3027 #ifdef ENABLE_CLASSIC 3028 else { 3029 3030 // dedicated bonding: send result and disconnect 3031 if (conn->bonding_flags & BONDING_DEDICATED){ 3032 conn->bonding_flags &= ~BONDING_DEDICATED; 3033 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3034 conn->bonding_status = packet[2]; 3035 break; 3036 } 3037 3038 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3039 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3040 bool connected_uses_aes_ccm = encryption_enabled == 2; 3041 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3042 log_info("SC during pairing, but only E0 now -> abort"); 3043 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3044 break; 3045 } 3046 3047 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3048 if (connected_uses_aes_ccm){ 3049 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3050 } 3051 3052 #ifdef ENABLE_TESTING_SUPPORT 3053 // work around for issue with PTS dongle 3054 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3055 #endif 3056 3057 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3058 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3059 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3060 } else { 3061 // if not, pretend everything is perfect 3062 hci_handle_read_encryption_key_size_complete(conn, 16); 3063 } 3064 } 3065 #endif 3066 } else { 3067 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3068 } 3069 } 3070 3071 break; 3072 3073 #ifdef ENABLE_CLASSIC 3074 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3075 handle = hci_event_authentication_complete_get_connection_handle(packet); 3076 conn = hci_connection_for_handle(handle); 3077 if (!conn) break; 3078 3079 // clear authentication active flag 3080 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3081 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3082 3083 // authenticated only if auth status == 0 3084 if (hci_event_authentication_complete_get_status(packet) == 0){ 3085 // authenticated 3086 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3087 3088 // If not already encrypted, start encryption 3089 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3090 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3091 break; 3092 } 3093 } 3094 3095 // emit updated security level 3096 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3097 break; 3098 3099 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3100 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3101 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3102 if (!conn) break; 3103 3104 // treat successfully paired connection as authenticated 3105 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3106 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3107 } 3108 3109 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3110 break; 3111 #endif 3112 3113 // HCI_EVENT_DISCONNECTION_COMPLETE 3114 // has been split, to first notify stack before shutting connection down 3115 // see end of function, too. 3116 case HCI_EVENT_DISCONNECTION_COMPLETE: 3117 if (packet[2]) break; // status != 0 3118 handle = little_endian_read_16(packet, 3); 3119 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3120 if (hci_stack->acl_fragmentation_total_size > 0u) { 3121 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3122 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3123 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3124 hci_stack->acl_fragmentation_total_size = 0; 3125 hci_stack->acl_fragmentation_pos = 0; 3126 if (release_buffer){ 3127 hci_release_packet_buffer(); 3128 } 3129 } 3130 } 3131 3132 conn = hci_connection_for_handle(handle); 3133 if (!conn) break; 3134 #ifdef ENABLE_CLASSIC 3135 // pairing failed if it was ongoing 3136 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3137 #endif 3138 3139 // emit dedicatd bonding event 3140 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3141 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3142 } 3143 3144 // mark connection for shutdown, stop timers, reset state 3145 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3146 hci_connection_stop_timer(conn); 3147 hci_connection_init(conn); 3148 3149 #ifdef ENABLE_BLE 3150 #ifdef ENABLE_LE_PERIPHERAL 3151 // re-enable advertisements for le connections if active 3152 if (hci_is_le_connection(conn)){ 3153 hci_update_advertisements_enabled_for_current_roles(); 3154 } 3155 #endif 3156 #endif 3157 break; 3158 3159 case HCI_EVENT_HARDWARE_ERROR: 3160 log_error("Hardware Error: 0x%02x", packet[2]); 3161 if (hci_stack->hardware_error_callback){ 3162 (*hci_stack->hardware_error_callback)(packet[2]); 3163 } else { 3164 // if no special requests, just reboot stack 3165 hci_power_control_off(); 3166 hci_power_control_on(); 3167 } 3168 break; 3169 3170 #ifdef ENABLE_CLASSIC 3171 case HCI_EVENT_ROLE_CHANGE: 3172 if (packet[2]) break; // status != 0 3173 reverse_bd_addr(&packet[3], addr); 3174 addr_type = BD_ADDR_TYPE_ACL; 3175 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3176 if (!conn) break; 3177 conn->role = packet[9]; 3178 break; 3179 #endif 3180 3181 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3182 // release packet buffer only for asynchronous transport and if there are not further fragements 3183 if (hci_transport_synchronous()) { 3184 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3185 return; // instead of break: to avoid re-entering hci_run() 3186 } 3187 hci_stack->acl_fragmentation_tx_active = 0; 3188 if (hci_stack->acl_fragmentation_total_size) break; 3189 hci_release_packet_buffer(); 3190 3191 // L2CAP receives this event via the hci_emit_event below 3192 3193 #ifdef ENABLE_CLASSIC 3194 // For SCO, we do the can_send_now_check here 3195 hci_notify_if_sco_can_send_now(); 3196 #endif 3197 break; 3198 3199 #ifdef ENABLE_CLASSIC 3200 case HCI_EVENT_SCO_CAN_SEND_NOW: 3201 // For SCO, we do the can_send_now_check here 3202 hci_stack->sco_can_send_now = true; 3203 hci_notify_if_sco_can_send_now(); 3204 return; 3205 3206 // explode inquriy results for easier consumption 3207 case HCI_EVENT_INQUIRY_RESULT: 3208 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3209 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3210 gap_inquiry_explode(packet, size); 3211 break; 3212 #endif 3213 3214 #ifdef ENABLE_BLE 3215 case HCI_EVENT_LE_META: 3216 switch (packet[2]){ 3217 #ifdef ENABLE_LE_CENTRAL 3218 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3219 // log_info("advertising report received"); 3220 if (!hci_stack->le_scanning_enabled) break; 3221 le_handle_advertisement_report(packet, size); 3222 break; 3223 #endif 3224 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3225 event_handle_le_connection_complete(packet); 3226 break; 3227 3228 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3229 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3230 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3231 conn = hci_connection_for_handle(handle); 3232 if (!conn) break; 3233 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3234 break; 3235 3236 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3237 // connection 3238 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3239 conn = hci_connection_for_handle(handle); 3240 if (conn) { 3241 // read arguments 3242 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3243 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3244 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3245 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3246 3247 // validate against current connection parameter range 3248 le_connection_parameter_range_t existing_range; 3249 gap_get_connection_parameter_range(&existing_range); 3250 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3251 if (update_parameter){ 3252 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3253 conn->le_conn_interval_min = le_conn_interval_min; 3254 conn->le_conn_interval_max = le_conn_interval_max; 3255 conn->le_conn_latency = le_conn_latency; 3256 conn->le_supervision_timeout = le_supervision_timeout; 3257 } else { 3258 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3259 } 3260 } 3261 break; 3262 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3263 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3264 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3265 conn = hci_connection_for_handle(handle); 3266 if (conn) { 3267 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3268 } 3269 break; 3270 #endif 3271 default: 3272 break; 3273 } 3274 break; 3275 #endif 3276 case HCI_EVENT_VENDOR_SPECIFIC: 3277 // Vendor specific commands often create vendor specific event instead of num completed packets 3278 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3279 switch (hci_stack->manufacturer){ 3280 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3281 hci_stack->num_cmd_packets = 1; 3282 break; 3283 default: 3284 break; 3285 } 3286 break; 3287 default: 3288 break; 3289 } 3290 3291 handle_event_for_current_stack_state(packet, size); 3292 3293 // notify upper stack 3294 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3295 3296 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3297 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3298 handle = little_endian_read_16(packet, 3); 3299 hci_connection_t * aConn = hci_connection_for_handle(handle); 3300 // discard connection if app did not trigger a reconnect in the event handler 3301 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3302 hci_shutdown_connection(aConn); 3303 } 3304 } 3305 3306 // execute main loop 3307 hci_run(); 3308 } 3309 3310 #ifdef ENABLE_CLASSIC 3311 3312 #ifdef ENABLE_SCO_OVER_HCI 3313 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3314 static void sco_schedule_tx(hci_connection_t * conn); 3315 3316 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3317 log_debug("SCO TX Timeout"); 3318 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3319 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3320 if (!conn) return; 3321 3322 // trigger send 3323 conn->sco_tx_ready = 1; 3324 // extra packet if CVSD but SCO buffer is too short 3325 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3326 conn->sco_tx_ready++; 3327 } 3328 hci_notify_if_sco_can_send_now(); 3329 } 3330 3331 3332 #define SCO_TX_AFTER_RX_MS (6) 3333 3334 static void sco_schedule_tx(hci_connection_t * conn){ 3335 3336 uint32_t now = btstack_run_loop_get_time_ms(); 3337 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3338 int time_delta_ms = sco_tx_ms - now; 3339 3340 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3341 3342 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3343 btstack_run_loop_remove_timer(timer); 3344 btstack_run_loop_set_timer(timer, time_delta_ms); 3345 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3346 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3347 btstack_run_loop_add_timer(timer); 3348 } 3349 #endif 3350 3351 static void sco_handler(uint8_t * packet, uint16_t size){ 3352 // lookup connection struct 3353 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3354 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3355 if (!conn) return; 3356 3357 #ifdef ENABLE_SCO_OVER_HCI 3358 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3359 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3360 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3361 packet[2] = 0x3c; 3362 memmove(&packet[3], &packet[23], 63); 3363 size = 63; 3364 } 3365 } 3366 3367 if (hci_have_usb_transport()){ 3368 // Nothing to do 3369 } else { 3370 // 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); 3371 if (hci_stack->synchronous_flow_control_enabled == 0){ 3372 uint32_t now = btstack_run_loop_get_time_ms(); 3373 3374 if (!conn->sco_rx_valid){ 3375 // ignore first 10 packets 3376 conn->sco_rx_count++; 3377 // log_debug("sco rx count %u", conn->sco_rx_count); 3378 if (conn->sco_rx_count == 10) { 3379 // use first timestamp as is and pretent it just started 3380 conn->sco_rx_ms = now; 3381 conn->sco_rx_valid = 1; 3382 conn->sco_rx_count = 0; 3383 sco_schedule_tx(conn); 3384 } 3385 } else { 3386 // track expected arrival timme 3387 conn->sco_rx_count++; 3388 conn->sco_rx_ms += 7; 3389 int delta = (int32_t) (now - conn->sco_rx_ms); 3390 if (delta > 0){ 3391 conn->sco_rx_ms++; 3392 } 3393 // log_debug("sco rx %u", conn->sco_rx_ms); 3394 sco_schedule_tx(conn); 3395 } 3396 } 3397 } 3398 #endif 3399 3400 // deliver to app 3401 if (hci_stack->sco_packet_handler) { 3402 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3403 } 3404 3405 #ifdef HAVE_SCO_TRANSPORT 3406 // We can send one packet for each received packet 3407 conn->sco_tx_ready++; 3408 hci_notify_if_sco_can_send_now(); 3409 #endif 3410 3411 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3412 conn->num_packets_completed++; 3413 hci_stack->host_completed_packets = 1; 3414 hci_run(); 3415 #endif 3416 } 3417 #endif 3418 3419 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3420 hci_dump_packet(packet_type, 1, packet, size); 3421 switch (packet_type) { 3422 case HCI_EVENT_PACKET: 3423 event_handler(packet, size); 3424 break; 3425 case HCI_ACL_DATA_PACKET: 3426 acl_handler(packet, size); 3427 break; 3428 #ifdef ENABLE_CLASSIC 3429 case HCI_SCO_DATA_PACKET: 3430 sco_handler(packet, size); 3431 break; 3432 #endif 3433 default: 3434 break; 3435 } 3436 } 3437 3438 /** 3439 * @brief Add event packet handler. 3440 */ 3441 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3442 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3443 } 3444 3445 3446 /** Register HCI packet handlers */ 3447 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3448 hci_stack->acl_packet_handler = handler; 3449 } 3450 3451 #ifdef ENABLE_CLASSIC 3452 /** 3453 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3454 */ 3455 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3456 hci_stack->sco_packet_handler = handler; 3457 } 3458 #endif 3459 3460 static void hci_state_reset(void){ 3461 // no connections yet 3462 hci_stack->connections = NULL; 3463 3464 // keep discoverable/connectable as this has been requested by the client(s) 3465 // hci_stack->discoverable = 0; 3466 // hci_stack->connectable = 0; 3467 // hci_stack->bondable = 1; 3468 // hci_stack->own_addr_type = 0; 3469 3470 // buffer is free 3471 hci_stack->hci_packet_buffer_reserved = false; 3472 3473 // no pending cmds 3474 hci_stack->decline_reason = 0; 3475 3476 hci_stack->secure_connections_active = false; 3477 3478 #ifdef ENABLE_CLASSIC 3479 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3480 hci_stack->gap_tasks = 3481 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3482 GAP_TASK_SET_CLASS_OF_DEVICE | 3483 GAP_TASK_SET_LOCAL_NAME | 3484 GAP_TASK_SET_EIR_DATA | 3485 GAP_TASK_WRITE_SCAN_ENABLE; 3486 #endif 3487 3488 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3489 hci_stack->classic_read_local_oob_data = true; 3490 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3491 #endif 3492 3493 // LE 3494 #ifdef ENABLE_BLE 3495 memset(hci_stack->le_random_address, 0, 6); 3496 hci_stack->le_random_address_set = 0; 3497 #endif 3498 #ifdef ENABLE_LE_CENTRAL 3499 hci_stack->le_scanning_active = false; 3500 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3501 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3502 hci_stack->le_whitelist_capacity = 0; 3503 #endif 3504 #ifdef ENABLE_LE_PERIPHERAL 3505 hci_stack->le_advertisements_active = false; 3506 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3507 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3508 } 3509 if (hci_stack->le_advertisements_data != NULL){ 3510 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3511 } 3512 #endif 3513 } 3514 3515 #ifdef ENABLE_CLASSIC 3516 /** 3517 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3518 */ 3519 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3520 // store and open remote device db 3521 hci_stack->link_key_db = link_key_db; 3522 if (hci_stack->link_key_db) { 3523 hci_stack->link_key_db->open(); 3524 } 3525 } 3526 #endif 3527 3528 void hci_init(const hci_transport_t *transport, const void *config){ 3529 3530 #ifdef HAVE_MALLOC 3531 if (!hci_stack) { 3532 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3533 } 3534 #else 3535 hci_stack = &hci_stack_static; 3536 #endif 3537 memset(hci_stack, 0, sizeof(hci_stack_t)); 3538 3539 // reference to use transport layer implementation 3540 hci_stack->hci_transport = transport; 3541 3542 // reference to used config 3543 hci_stack->config = config; 3544 3545 // setup pointer for outgoing packet buffer 3546 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3547 3548 // max acl payload size defined in config.h 3549 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3550 3551 // register packet handlers with transport 3552 transport->register_packet_handler(&packet_handler); 3553 3554 hci_stack->state = HCI_STATE_OFF; 3555 3556 // class of device 3557 hci_stack->class_of_device = 0x007a020c; // Smartphone 3558 3559 // bondable by default 3560 hci_stack->bondable = 1; 3561 3562 #ifdef ENABLE_CLASSIC 3563 // classic name 3564 hci_stack->local_name = default_classic_name; 3565 3566 // Master slave policy 3567 hci_stack->master_slave_policy = 1; 3568 3569 // Allow Role Switch 3570 hci_stack->allow_role_switch = 1; 3571 3572 // Default / minimum security level = 2 3573 hci_stack->gap_security_level = LEVEL_2; 3574 3575 // Default Security Mode 4 3576 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3577 3578 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3579 hci_stack->gap_required_encyrption_key_size = 7; 3580 3581 // Link Supervision Timeout 3582 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3583 3584 #endif 3585 3586 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3587 hci_stack->ssp_enable = 1; 3588 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3589 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3590 hci_stack->ssp_auto_accept = 1; 3591 3592 // Secure Connections: enable (requires support from Controller) 3593 hci_stack->secure_connections_enable = true; 3594 3595 // voice setting - signed 16 bit pcm data with CVSD over the air 3596 hci_stack->sco_voice_setting = 0x60; 3597 3598 #ifdef ENABLE_LE_CENTRAL 3599 // connection parameter to use for outgoing connections 3600 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3601 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3602 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3603 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3604 hci_stack->le_connection_latency = 4; // 4 3605 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3606 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3607 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3608 3609 // default LE Scanning 3610 hci_stack->le_scan_type = 0x1; // active 3611 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3612 hci_stack->le_scan_window = 0x30; // 30 ms 3613 #endif 3614 3615 #ifdef ENABLE_LE_PERIPHERAL 3616 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3617 #endif 3618 3619 // connection parameter range used to answer connection parameter update requests in l2cap 3620 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3621 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3622 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3623 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3624 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3625 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3626 3627 hci_state_reset(); 3628 } 3629 3630 void hci_deinit(void){ 3631 #ifdef HAVE_MALLOC 3632 if (hci_stack) { 3633 free(hci_stack); 3634 } 3635 #endif 3636 hci_stack = NULL; 3637 3638 #ifdef ENABLE_CLASSIC 3639 disable_l2cap_timeouts = 0; 3640 #endif 3641 } 3642 3643 /** 3644 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3645 */ 3646 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3647 hci_stack->chipset = chipset_driver; 3648 3649 // reset chipset driver - init is also called on power_up 3650 if (hci_stack->chipset && hci_stack->chipset->init){ 3651 hci_stack->chipset->init(hci_stack->config); 3652 } 3653 } 3654 3655 /** 3656 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3657 */ 3658 void hci_set_control(const btstack_control_t *hardware_control){ 3659 // references to used control implementation 3660 hci_stack->control = hardware_control; 3661 // init with transport config 3662 hardware_control->init(hci_stack->config); 3663 } 3664 3665 void hci_close(void){ 3666 3667 #ifdef ENABLE_CLASSIC 3668 // close remote device db 3669 if (hci_stack->link_key_db) { 3670 hci_stack->link_key_db->close(); 3671 } 3672 #endif 3673 3674 btstack_linked_list_iterator_t lit; 3675 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3676 while (btstack_linked_list_iterator_has_next(&lit)){ 3677 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3678 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3679 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3680 hci_shutdown_connection(connection); 3681 } 3682 3683 hci_power_control(HCI_POWER_OFF); 3684 3685 #ifdef HAVE_MALLOC 3686 free(hci_stack); 3687 #endif 3688 hci_stack = NULL; 3689 } 3690 3691 #ifdef HAVE_SCO_TRANSPORT 3692 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3693 hci_stack->sco_transport = sco_transport; 3694 sco_transport->register_packet_handler(&packet_handler); 3695 } 3696 #endif 3697 3698 #ifdef ENABLE_CLASSIC 3699 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3700 // validate ranage and set 3701 if (encryption_key_size < 7) return; 3702 if (encryption_key_size > 16) return; 3703 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3704 } 3705 3706 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3707 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3708 hci_stack->gap_security_mode = security_mode; 3709 return ERROR_CODE_SUCCESS; 3710 } else { 3711 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3712 } 3713 } 3714 3715 gap_security_mode_t gap_get_security_mode(void){ 3716 return hci_stack->gap_security_mode; 3717 } 3718 3719 void gap_set_security_level(gap_security_level_t security_level){ 3720 hci_stack->gap_security_level = security_level; 3721 } 3722 3723 gap_security_level_t gap_get_security_level(void){ 3724 if (hci_stack->gap_secure_connections_only_mode){ 3725 return LEVEL_4; 3726 } 3727 return hci_stack->gap_security_level; 3728 } 3729 3730 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3731 hci_stack->gap_minimal_service_security_level = security_level; 3732 } 3733 3734 void gap_set_secure_connections_only_mode(bool enable){ 3735 hci_stack->gap_secure_connections_only_mode = enable; 3736 } 3737 3738 bool gap_get_secure_connections_only_mode(void){ 3739 return hci_stack->gap_secure_connections_only_mode; 3740 } 3741 #endif 3742 3743 #ifdef ENABLE_CLASSIC 3744 void gap_set_class_of_device(uint32_t class_of_device){ 3745 hci_stack->class_of_device = class_of_device; 3746 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3747 hci_run(); 3748 } 3749 3750 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3751 hci_stack->default_link_policy_settings = default_link_policy_settings; 3752 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3753 hci_run(); 3754 } 3755 3756 void gap_set_allow_role_switch(bool allow_role_switch){ 3757 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3758 } 3759 3760 uint8_t hci_get_allow_role_switch(void){ 3761 return hci_stack->allow_role_switch; 3762 } 3763 3764 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3765 hci_stack->link_supervision_timeout = link_supervision_timeout; 3766 } 3767 3768 void hci_disable_l2cap_timeout_check(void){ 3769 disable_l2cap_timeouts = 1; 3770 } 3771 #endif 3772 3773 #ifndef HAVE_HOST_CONTROLLER_API 3774 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3775 void hci_set_bd_addr(bd_addr_t addr){ 3776 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3777 hci_stack->custom_bd_addr_set = 1; 3778 } 3779 #endif 3780 3781 // State-Module-Driver overview 3782 // state module low-level 3783 // HCI_STATE_OFF off close 3784 // HCI_STATE_INITIALIZING, on open 3785 // HCI_STATE_WORKING, on open 3786 // HCI_STATE_HALTING, on open 3787 // HCI_STATE_SLEEPING, off/sleep close 3788 // HCI_STATE_FALLING_ASLEEP on open 3789 3790 static int hci_power_control_on(void){ 3791 3792 // power on 3793 int err = 0; 3794 if (hci_stack->control && hci_stack->control->on){ 3795 err = (*hci_stack->control->on)(); 3796 } 3797 if (err){ 3798 log_error( "POWER_ON failed"); 3799 hci_emit_hci_open_failed(); 3800 return err; 3801 } 3802 3803 // int chipset driver 3804 if (hci_stack->chipset && hci_stack->chipset->init){ 3805 hci_stack->chipset->init(hci_stack->config); 3806 } 3807 3808 // init transport 3809 if (hci_stack->hci_transport->init){ 3810 hci_stack->hci_transport->init(hci_stack->config); 3811 } 3812 3813 // open transport 3814 err = hci_stack->hci_transport->open(); 3815 if (err){ 3816 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3817 if (hci_stack->control && hci_stack->control->off){ 3818 (*hci_stack->control->off)(); 3819 } 3820 hci_emit_hci_open_failed(); 3821 return err; 3822 } 3823 return 0; 3824 } 3825 3826 static void hci_power_control_off(void){ 3827 3828 log_info("hci_power_control_off"); 3829 3830 // close low-level device 3831 hci_stack->hci_transport->close(); 3832 3833 log_info("hci_power_control_off - hci_transport closed"); 3834 3835 // power off 3836 if (hci_stack->control && hci_stack->control->off){ 3837 (*hci_stack->control->off)(); 3838 } 3839 3840 log_info("hci_power_control_off - control closed"); 3841 3842 hci_stack->state = HCI_STATE_OFF; 3843 } 3844 3845 static void hci_power_control_sleep(void){ 3846 3847 log_info("hci_power_control_sleep"); 3848 3849 #if 0 3850 // don't close serial port during sleep 3851 3852 // close low-level device 3853 hci_stack->hci_transport->close(hci_stack->config); 3854 #endif 3855 3856 // sleep mode 3857 if (hci_stack->control && hci_stack->control->sleep){ 3858 (*hci_stack->control->sleep)(); 3859 } 3860 3861 hci_stack->state = HCI_STATE_SLEEPING; 3862 } 3863 3864 static int hci_power_control_wake(void){ 3865 3866 log_info("hci_power_control_wake"); 3867 3868 // wake on 3869 if (hci_stack->control && hci_stack->control->wake){ 3870 (*hci_stack->control->wake)(); 3871 } 3872 3873 #if 0 3874 // open low-level device 3875 int err = hci_stack->hci_transport->open(hci_stack->config); 3876 if (err){ 3877 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3878 if (hci_stack->control && hci_stack->control->off){ 3879 (*hci_stack->control->off)(); 3880 } 3881 hci_emit_hci_open_failed(); 3882 return err; 3883 } 3884 #endif 3885 3886 return 0; 3887 } 3888 3889 static void hci_power_transition_to_initializing(void){ 3890 // set up state machine 3891 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3892 hci_stack->hci_packet_buffer_reserved = false; 3893 hci_stack->state = HCI_STATE_INITIALIZING; 3894 hci_stack->substate = HCI_INIT_SEND_RESET; 3895 } 3896 3897 // returns error 3898 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3899 int err; 3900 switch (power_mode){ 3901 case HCI_POWER_ON: 3902 err = hci_power_control_on(); 3903 if (err != 0) { 3904 log_error("hci_power_control_on() error %d", err); 3905 return err; 3906 } 3907 hci_power_transition_to_initializing(); 3908 break; 3909 case HCI_POWER_OFF: 3910 // do nothing 3911 break; 3912 case HCI_POWER_SLEEP: 3913 // do nothing (with SLEEP == OFF) 3914 break; 3915 default: 3916 btstack_assert(false); 3917 break; 3918 } 3919 return ERROR_CODE_SUCCESS; 3920 } 3921 3922 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3923 switch (power_mode){ 3924 case HCI_POWER_ON: 3925 // do nothing 3926 break; 3927 case HCI_POWER_OFF: 3928 // no connections yet, just turn it off 3929 hci_power_control_off(); 3930 break; 3931 case HCI_POWER_SLEEP: 3932 // no connections yet, just turn it off 3933 hci_power_control_sleep(); 3934 break; 3935 default: 3936 btstack_assert(false); 3937 break; 3938 } 3939 return ERROR_CODE_SUCCESS; 3940 } 3941 3942 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3943 switch (power_mode){ 3944 case HCI_POWER_ON: 3945 // do nothing 3946 break; 3947 case HCI_POWER_OFF: 3948 // see hci_run 3949 hci_stack->state = HCI_STATE_HALTING; 3950 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3951 break; 3952 case HCI_POWER_SLEEP: 3953 // see hci_run 3954 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3955 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3956 break; 3957 default: 3958 btstack_assert(false); 3959 break; 3960 } 3961 return ERROR_CODE_SUCCESS; 3962 } 3963 3964 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3965 switch (power_mode){ 3966 case HCI_POWER_ON: 3967 hci_power_transition_to_initializing(); 3968 break; 3969 case HCI_POWER_OFF: 3970 // do nothing 3971 break; 3972 case HCI_POWER_SLEEP: 3973 // see hci_run 3974 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3975 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3976 break; 3977 default: 3978 btstack_assert(false); 3979 break; 3980 } 3981 return ERROR_CODE_SUCCESS; 3982 } 3983 3984 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3985 switch (power_mode){ 3986 case HCI_POWER_ON: 3987 hci_power_transition_to_initializing(); 3988 break; 3989 case HCI_POWER_OFF: 3990 // see hci_run 3991 hci_stack->state = HCI_STATE_HALTING; 3992 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3993 break; 3994 case HCI_POWER_SLEEP: 3995 // do nothing 3996 break; 3997 default: 3998 btstack_assert(false); 3999 break; 4000 } 4001 return ERROR_CODE_SUCCESS; 4002 } 4003 4004 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4005 int err; 4006 switch (power_mode){ 4007 case HCI_POWER_ON: 4008 err = hci_power_control_wake(); 4009 if (err) return err; 4010 hci_power_transition_to_initializing(); 4011 break; 4012 case HCI_POWER_OFF: 4013 hci_stack->state = HCI_STATE_HALTING; 4014 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4015 break; 4016 case HCI_POWER_SLEEP: 4017 // do nothing 4018 break; 4019 default: 4020 btstack_assert(false); 4021 break; 4022 } 4023 return ERROR_CODE_SUCCESS; 4024 } 4025 4026 int hci_power_control(HCI_POWER_MODE power_mode){ 4027 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4028 int err = 0; 4029 switch (hci_stack->state){ 4030 case HCI_STATE_OFF: 4031 err = hci_power_control_state_off(power_mode); 4032 break; 4033 case HCI_STATE_INITIALIZING: 4034 err = hci_power_control_state_initializing(power_mode); 4035 break; 4036 case HCI_STATE_WORKING: 4037 err = hci_power_control_state_working(power_mode); 4038 break; 4039 case HCI_STATE_HALTING: 4040 err = hci_power_control_state_halting(power_mode); 4041 break; 4042 case HCI_STATE_FALLING_ASLEEP: 4043 err = hci_power_control_state_falling_asleep(power_mode); 4044 break; 4045 case HCI_STATE_SLEEPING: 4046 err = hci_power_control_state_sleeping(power_mode); 4047 break; 4048 default: 4049 btstack_assert(false); 4050 break; 4051 } 4052 if (err != 0){ 4053 return err; 4054 } 4055 4056 // create internal event 4057 hci_emit_state(); 4058 4059 // trigger next/first action 4060 hci_run(); 4061 4062 return 0; 4063 } 4064 4065 4066 #ifdef ENABLE_CLASSIC 4067 4068 static void hci_update_scan_enable(void){ 4069 // 2 = page scan, 1 = inq scan 4070 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4071 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4072 hci_run(); 4073 } 4074 4075 void gap_discoverable_control(uint8_t enable){ 4076 if (enable) enable = 1; // normalize argument 4077 4078 if (hci_stack->discoverable == enable){ 4079 hci_emit_discoverable_enabled(hci_stack->discoverable); 4080 return; 4081 } 4082 4083 hci_stack->discoverable = enable; 4084 hci_update_scan_enable(); 4085 } 4086 4087 void gap_connectable_control(uint8_t enable){ 4088 if (enable) enable = 1; // normalize argument 4089 4090 // don't emit event 4091 if (hci_stack->connectable == enable) return; 4092 4093 hci_stack->connectable = enable; 4094 hci_update_scan_enable(); 4095 } 4096 #endif 4097 4098 void gap_local_bd_addr(bd_addr_t address_buffer){ 4099 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4100 } 4101 4102 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4103 static void hci_host_num_completed_packets(void){ 4104 4105 // create packet manually as arrays are not supported and num_commands should not get reduced 4106 hci_reserve_packet_buffer(); 4107 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4108 4109 uint16_t size = 0; 4110 uint16_t num_handles = 0; 4111 packet[size++] = 0x35; 4112 packet[size++] = 0x0c; 4113 size++; // skip param len 4114 size++; // skip num handles 4115 4116 // add { handle, packets } entries 4117 btstack_linked_item_t * it; 4118 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4119 hci_connection_t * connection = (hci_connection_t *) it; 4120 if (connection->num_packets_completed){ 4121 little_endian_store_16(packet, size, connection->con_handle); 4122 size += 2; 4123 little_endian_store_16(packet, size, connection->num_packets_completed); 4124 size += 2; 4125 // 4126 num_handles++; 4127 connection->num_packets_completed = 0; 4128 } 4129 } 4130 4131 packet[2] = size - 3; 4132 packet[3] = num_handles; 4133 4134 hci_stack->host_completed_packets = 0; 4135 4136 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4137 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4138 4139 // release packet buffer for synchronous transport implementations 4140 if (hci_transport_synchronous()){ 4141 hci_release_packet_buffer(); 4142 hci_emit_transport_packet_sent(); 4143 } 4144 } 4145 #endif 4146 4147 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4148 UNUSED(ds); 4149 hci_stack->substate = HCI_HALTING_CLOSE; 4150 // allow packet handlers to defer final shutdown 4151 hci_emit_state(); 4152 hci_run(); 4153 } 4154 4155 static bool hci_run_acl_fragments(void){ 4156 if (hci_stack->acl_fragmentation_total_size > 0u) { 4157 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4158 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4159 if (connection) { 4160 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4161 hci_send_acl_packet_fragments(connection); 4162 return true; 4163 } 4164 } else { 4165 // connection gone -> discard further fragments 4166 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4167 hci_stack->acl_fragmentation_total_size = 0; 4168 hci_stack->acl_fragmentation_pos = 0; 4169 } 4170 } 4171 return false; 4172 } 4173 4174 #ifdef ENABLE_CLASSIC 4175 static bool hci_run_general_gap_classic(void){ 4176 4177 // assert stack is working and classic is active 4178 if (hci_classic_supported() == false) return false; 4179 if (hci_stack->state != HCI_STATE_WORKING) return false; 4180 4181 // decline incoming connections 4182 if (hci_stack->decline_reason){ 4183 uint8_t reason = hci_stack->decline_reason; 4184 hci_stack->decline_reason = 0; 4185 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4186 return true; 4187 } 4188 4189 if (hci_stack->gap_tasks != 0){ 4190 hci_run_gap_tasks_classic(); 4191 return true; 4192 } 4193 4194 // start/stop inquiry 4195 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4196 uint8_t duration = hci_stack->inquiry_state; 4197 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4198 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4199 return true; 4200 } 4201 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4202 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4203 hci_send_cmd(&hci_inquiry_cancel); 4204 return true; 4205 } 4206 // remote name request 4207 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4208 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4209 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4210 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4211 return true; 4212 } 4213 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4214 // Local OOB data 4215 if (hci_stack->classic_read_local_oob_data){ 4216 hci_stack->classic_read_local_oob_data = false; 4217 if (hci_stack->local_supported_commands[1] & 0x10u){ 4218 hci_send_cmd(&hci_read_local_extended_oob_data); 4219 } else { 4220 hci_send_cmd(&hci_read_local_oob_data); 4221 } 4222 } 4223 #endif 4224 // pairing 4225 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4226 uint8_t state = hci_stack->gap_pairing_state; 4227 uint8_t pin_code[16]; 4228 switch (state){ 4229 case GAP_PAIRING_STATE_SEND_PIN: 4230 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4231 memset(pin_code, 0, 16); 4232 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4233 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4234 break; 4235 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4236 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4237 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4238 break; 4239 case GAP_PAIRING_STATE_SEND_PASSKEY: 4240 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4241 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4242 break; 4243 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4244 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4245 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4246 break; 4247 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4248 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4249 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4250 break; 4251 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4252 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4253 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4254 break; 4255 default: 4256 break; 4257 } 4258 return true; 4259 } 4260 return false; 4261 } 4262 #endif 4263 4264 #ifdef ENABLE_BLE 4265 static bool hci_run_general_gap_le(void){ 4266 4267 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4268 4269 if (hci_stack->state != HCI_STATE_WORKING) return false; 4270 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4271 4272 4273 // Phase 1: collect what to stop 4274 4275 bool scanning_stop = false; 4276 bool connecting_stop = false; 4277 bool advertising_stop = false; 4278 4279 #ifndef ENABLE_LE_CENTRAL 4280 UNUSED(scanning_stop); 4281 UNUSED(connecting_stop); 4282 #endif 4283 #ifndef ENABLE_LE_PERIPHERAL 4284 UNUSED(advertising_stop); 4285 #endif 4286 4287 // check if whitelist needs modification 4288 bool whitelist_modification_pending = false; 4289 btstack_linked_list_iterator_t lit; 4290 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4291 while (btstack_linked_list_iterator_has_next(&lit)){ 4292 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4293 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4294 whitelist_modification_pending = true; 4295 break; 4296 } 4297 } 4298 // check if resolving list needs modification 4299 bool resolving_list_modification_pending = false; 4300 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4301 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4302 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4303 resolving_list_modification_pending = true; 4304 } 4305 #endif 4306 4307 #ifdef ENABLE_LE_CENTRAL 4308 // scanning control 4309 if (hci_stack->le_scanning_active) { 4310 // stop if: 4311 // - parameter change required 4312 // - it's disabled 4313 // - whitelist change required but used for scanning 4314 // - resolving list modified 4315 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4316 if ((hci_stack->le_scanning_param_update) || 4317 !hci_stack->le_scanning_enabled || 4318 scanning_uses_whitelist || 4319 resolving_list_modification_pending){ 4320 4321 scanning_stop = true; 4322 } 4323 } 4324 #endif 4325 4326 #ifdef ENABLE_LE_CENTRAL 4327 // connecting control 4328 bool connecting_with_whitelist; 4329 switch (hci_stack->le_connecting_state){ 4330 case LE_CONNECTING_DIRECT: 4331 case LE_CONNECTING_WHITELIST: 4332 // stop connecting if: 4333 // - connecting uses white and whitelist modification pending 4334 // - if it got disabled 4335 // - resolving list modified 4336 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4337 if ((connecting_with_whitelist && whitelist_modification_pending) || 4338 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4339 resolving_list_modification_pending) { 4340 4341 connecting_stop = true; 4342 } 4343 break; 4344 default: 4345 break; 4346 } 4347 #endif 4348 4349 #ifdef ENABLE_LE_PERIPHERAL 4350 // le advertisement control 4351 if (hci_stack->le_advertisements_active){ 4352 // stop if: 4353 // - parameter change required 4354 // - it's disabled 4355 // - whitelist change required but used for advertisement filter policy 4356 // - resolving list modified 4357 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4358 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4359 if (advertising_change || 4360 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4361 (advertising_uses_whitelist & whitelist_modification_pending) || 4362 resolving_list_modification_pending) { 4363 4364 advertising_stop = true; 4365 } 4366 } 4367 #endif 4368 4369 4370 // Phase 2: stop everything that should be off during modifications 4371 4372 #ifdef ENABLE_LE_CENTRAL 4373 if (scanning_stop){ 4374 hci_stack->le_scanning_active = false; 4375 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4376 return true; 4377 } 4378 #endif 4379 4380 #ifdef ENABLE_LE_CENTRAL 4381 if (connecting_stop){ 4382 hci_send_cmd(&hci_le_create_connection_cancel); 4383 return true; 4384 } 4385 #endif 4386 4387 #ifdef ENABLE_LE_PERIPHERAL 4388 if (advertising_stop){ 4389 hci_stack->le_advertisements_active = false; 4390 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4391 return true; 4392 } 4393 #endif 4394 4395 // Phase 3: modify 4396 4397 #ifdef ENABLE_LE_CENTRAL 4398 if (hci_stack->le_scanning_param_update){ 4399 hci_stack->le_scanning_param_update = false; 4400 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4401 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4402 return true; 4403 } 4404 #endif 4405 4406 #ifdef ENABLE_LE_PERIPHERAL 4407 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4408 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4409 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4410 hci_send_cmd(&hci_le_set_advertising_parameters, 4411 hci_stack->le_advertisements_interval_min, 4412 hci_stack->le_advertisements_interval_max, 4413 hci_stack->le_advertisements_type, 4414 hci_stack->le_advertisements_own_addr_type, 4415 hci_stack->le_advertisements_direct_address_type, 4416 hci_stack->le_advertisements_direct_address, 4417 hci_stack->le_advertisements_channel_map, 4418 hci_stack->le_advertisements_filter_policy); 4419 return true; 4420 } 4421 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4422 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4423 uint8_t adv_data_clean[31]; 4424 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4425 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4426 hci_stack->le_advertisements_data_len); 4427 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4428 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4429 return true; 4430 } 4431 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4432 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4433 uint8_t scan_data_clean[31]; 4434 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4435 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4436 hci_stack->le_scan_response_data_len); 4437 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4438 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4439 return true; 4440 } 4441 #endif 4442 4443 4444 #ifdef ENABLE_LE_CENTRAL 4445 // if connect with whitelist was active and is not cancelled yet, wait until next time 4446 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4447 #endif 4448 4449 // LE Whitelist Management 4450 if (whitelist_modification_pending){ 4451 // add/remove entries 4452 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4453 while (btstack_linked_list_iterator_has_next(&lit)){ 4454 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4455 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4456 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4457 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4458 return true; 4459 } 4460 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4461 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4462 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4463 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4464 return true; 4465 } 4466 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4467 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4468 btstack_memory_whitelist_entry_free(entry); 4469 } 4470 } 4471 } 4472 4473 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4474 // LE Resolving List Management 4475 if (resolving_list_supported) { 4476 uint16_t i; 4477 switch (hci_stack->le_resolving_list_state) { 4478 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4479 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4480 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4481 return true; 4482 case LE_RESOLVING_LIST_READ_SIZE: 4483 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4484 hci_send_cmd(&hci_le_read_resolving_list_size); 4485 return true; 4486 case LE_RESOLVING_LIST_SEND_CLEAR: 4487 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4488 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4489 sizeof(hci_stack->le_resolving_list_add_entries)); 4490 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4491 sizeof(hci_stack->le_resolving_list_remove_entries)); 4492 hci_send_cmd(&hci_le_clear_resolving_list); 4493 return true; 4494 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4495 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4496 uint8_t offset = i >> 3; 4497 uint8_t mask = 1 << (i & 7); 4498 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4499 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4500 bd_addr_t peer_identity_addreses; 4501 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4502 sm_key_t peer_irk; 4503 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4504 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4505 4506 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4507 // trigger whitelist entry 'update' (work around for controller bug) 4508 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4509 while (btstack_linked_list_iterator_has_next(&lit)) { 4510 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4511 if (entry->address_type != peer_identity_addr_type) continue; 4512 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4513 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4514 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4515 } 4516 #endif 4517 4518 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4519 peer_identity_addreses); 4520 return true; 4521 } 4522 4523 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4524 4525 /* fall through */ 4526 4527 case LE_RESOLVING_LIST_ADD_ENTRIES: 4528 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4529 uint8_t offset = i >> 3; 4530 uint8_t mask = 1 << (i & 7); 4531 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4532 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4533 bd_addr_t peer_identity_addreses; 4534 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4535 sm_key_t peer_irk; 4536 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4537 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4538 const uint8_t *local_irk = gap_get_persistent_irk(); 4539 // command uses format specifier 'P' that stores 16-byte value without flip 4540 uint8_t local_irk_flipped[16]; 4541 uint8_t peer_irk_flipped[16]; 4542 reverse_128(local_irk, local_irk_flipped); 4543 reverse_128(peer_irk, peer_irk_flipped); 4544 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4545 peer_irk_flipped, local_irk_flipped); 4546 return true; 4547 } 4548 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4549 break; 4550 4551 default: 4552 break; 4553 } 4554 } 4555 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4556 #endif 4557 4558 // Phase 4: restore state 4559 4560 #ifdef ENABLE_LE_CENTRAL 4561 // re-start scanning 4562 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4563 hci_stack->le_scanning_active = true; 4564 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4565 return true; 4566 } 4567 #endif 4568 4569 #ifdef ENABLE_LE_CENTRAL 4570 // re-start connecting 4571 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4572 bd_addr_t null_addr; 4573 memset(null_addr, 0, 6); 4574 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4575 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4576 hci_send_cmd(&hci_le_create_connection, 4577 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4578 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4579 1, // use whitelist 4580 0, // peer address type 4581 null_addr, // peer bd addr 4582 hci_stack->le_connection_own_addr_type, // our addr type: 4583 hci_stack->le_connection_interval_min, // conn interval min 4584 hci_stack->le_connection_interval_max, // conn interval max 4585 hci_stack->le_connection_latency, // conn latency 4586 hci_stack->le_supervision_timeout, // conn latency 4587 hci_stack->le_minimum_ce_length, // min ce length 4588 hci_stack->le_maximum_ce_length // max ce length 4589 ); 4590 return true; 4591 } 4592 #endif 4593 4594 #ifdef ENABLE_LE_PERIPHERAL 4595 // re-start advertising 4596 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4597 // check if advertisements should be enabled given 4598 hci_stack->le_advertisements_active = true; 4599 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4600 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4601 return true; 4602 } 4603 #endif 4604 4605 return false; 4606 } 4607 #endif 4608 4609 static bool hci_run_general_pending_commands(void){ 4610 btstack_linked_item_t * it; 4611 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4612 hci_connection_t * connection = (hci_connection_t *) it; 4613 4614 switch(connection->state){ 4615 case SEND_CREATE_CONNECTION: 4616 switch(connection->address_type){ 4617 #ifdef ENABLE_CLASSIC 4618 case BD_ADDR_TYPE_ACL: 4619 log_info("sending hci_create_connection"); 4620 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4621 break; 4622 #endif 4623 default: 4624 #ifdef ENABLE_BLE 4625 #ifdef ENABLE_LE_CENTRAL 4626 log_info("sending hci_le_create_connection"); 4627 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4628 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4629 hci_send_cmd(&hci_le_create_connection, 4630 hci_stack->le_connection_scan_interval, // conn scan interval 4631 hci_stack->le_connection_scan_window, // conn scan windows 4632 0, // don't use whitelist 4633 connection->address_type, // peer address type 4634 connection->address, // peer bd addr 4635 hci_stack->le_connection_own_addr_type, // our addr type: 4636 hci_stack->le_connection_interval_min, // conn interval min 4637 hci_stack->le_connection_interval_max, // conn interval max 4638 hci_stack->le_connection_latency, // conn latency 4639 hci_stack->le_supervision_timeout, // conn latency 4640 hci_stack->le_minimum_ce_length, // min ce length 4641 hci_stack->le_maximum_ce_length // max ce length 4642 ); 4643 connection->state = SENT_CREATE_CONNECTION; 4644 #endif 4645 #endif 4646 break; 4647 } 4648 return true; 4649 4650 #ifdef ENABLE_CLASSIC 4651 case RECEIVED_CONNECTION_REQUEST: 4652 connection->role = HCI_ROLE_SLAVE; 4653 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4654 log_info("sending hci_accept_connection_request"); 4655 connection->state = ACCEPTED_CONNECTION_REQUEST; 4656 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4657 } 4658 return true; 4659 #endif 4660 4661 #ifdef ENABLE_BLE 4662 #ifdef ENABLE_LE_CENTRAL 4663 case SEND_CANCEL_CONNECTION: 4664 connection->state = SENT_CANCEL_CONNECTION; 4665 hci_send_cmd(&hci_le_create_connection_cancel); 4666 return true; 4667 #endif 4668 #endif 4669 case SEND_DISCONNECT: 4670 connection->state = SENT_DISCONNECT; 4671 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4672 return true; 4673 4674 default: 4675 break; 4676 } 4677 4678 // no further commands if connection is about to get shut down 4679 if (connection->state == SENT_DISCONNECT) continue; 4680 4681 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4682 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4683 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4684 return true; 4685 } 4686 4687 #ifdef ENABLE_CLASSIC 4688 4689 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4690 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4691 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4692 return true; 4693 } 4694 4695 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4696 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4697 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4698 return true; 4699 } 4700 4701 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4702 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4703 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4704 return true; 4705 } 4706 4707 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4708 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4709 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4710 return true; 4711 } 4712 4713 // Handling link key request requires remote supported features 4714 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4715 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4716 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4717 4718 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4719 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4720 if (have_link_key && security_level_sufficient){ 4721 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4722 } else { 4723 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4724 } 4725 return true; 4726 } 4727 4728 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4729 log_info("denying to pin request"); 4730 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4731 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4732 return true; 4733 } 4734 4735 // security assessment requires remote features 4736 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4737 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4738 hci_ssp_assess_security_on_io_cap_request(connection); 4739 // 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 4740 } 4741 4742 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4743 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4744 // set authentication requirements: 4745 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4746 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4747 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4748 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4749 authreq |= 1; 4750 } 4751 bool bonding = hci_stack->bondable; 4752 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4753 // if we have received IO Cap Response, we're in responder role 4754 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4755 if (bonding && !remote_bonding){ 4756 log_info("Remote not bonding, dropping local flag"); 4757 bonding = false; 4758 } 4759 } 4760 if (bonding){ 4761 if (connection->bonding_flags & BONDING_DEDICATED){ 4762 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4763 } else { 4764 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4765 } 4766 } 4767 uint8_t have_oob_data = 0; 4768 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4769 if (connection->classic_oob_c_192 != NULL){ 4770 have_oob_data |= 1; 4771 } 4772 if (connection->classic_oob_c_256 != NULL){ 4773 have_oob_data |= 2; 4774 } 4775 #endif 4776 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4777 return true; 4778 } 4779 4780 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4781 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4782 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4783 return true; 4784 } 4785 4786 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4787 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4788 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4789 const uint8_t zero[16] = { 0 }; 4790 const uint8_t * r_192 = zero; 4791 const uint8_t * c_192 = zero; 4792 const uint8_t * r_256 = zero; 4793 const uint8_t * c_256 = zero; 4794 // verify P-256 OOB 4795 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4796 c_256 = connection->classic_oob_c_256; 4797 if (connection->classic_oob_r_256 != NULL) { 4798 r_256 = connection->classic_oob_r_256; 4799 } 4800 } 4801 // verify P-192 OOB 4802 if ((connection->classic_oob_c_192 != NULL)) { 4803 c_192 = connection->classic_oob_c_192; 4804 if (connection->classic_oob_r_192 != NULL) { 4805 r_192 = connection->classic_oob_r_192; 4806 } 4807 } 4808 4809 // assess security 4810 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4811 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4812 if (need_level_4 && !can_reach_level_4){ 4813 log_info("Level 4 required, but not possible -> abort"); 4814 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4815 // send oob negative reply 4816 c_256 = NULL; 4817 c_192 = NULL; 4818 } 4819 4820 // Reply 4821 if (c_256 != zero) { 4822 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4823 } else if (c_192 != zero){ 4824 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4825 } else { 4826 hci_stack->classic_oob_con_handle = connection->con_handle; 4827 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4828 } 4829 return true; 4830 } 4831 #endif 4832 4833 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4834 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4835 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4836 return true; 4837 } 4838 4839 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4840 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4841 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4842 return true; 4843 } 4844 4845 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4846 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4847 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4848 return true; 4849 } 4850 4851 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4852 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4853 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4854 connection->state = SENT_DISCONNECT; 4855 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4856 return true; 4857 } 4858 4859 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4860 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4861 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4862 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4863 return true; 4864 } 4865 4866 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4867 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4868 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4869 return true; 4870 } 4871 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4872 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4873 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4874 return true; 4875 } 4876 #endif 4877 4878 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4879 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4880 #ifdef ENABLE_CLASSIC 4881 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4882 #endif 4883 if (connection->state != SENT_DISCONNECT){ 4884 connection->state = SENT_DISCONNECT; 4885 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4886 return true; 4887 } 4888 } 4889 4890 #ifdef ENABLE_CLASSIC 4891 uint16_t sniff_min_interval; 4892 switch (connection->sniff_min_interval){ 4893 case 0: 4894 break; 4895 case 0xffff: 4896 connection->sniff_min_interval = 0; 4897 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4898 return true; 4899 default: 4900 sniff_min_interval = connection->sniff_min_interval; 4901 connection->sniff_min_interval = 0; 4902 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4903 return true; 4904 } 4905 4906 if (connection->sniff_subrating_max_latency != 0xffff){ 4907 uint16_t max_latency = connection->sniff_subrating_max_latency; 4908 connection->sniff_subrating_max_latency = 0; 4909 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4910 return true; 4911 } 4912 4913 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4914 uint8_t service_type = (uint8_t) connection->qos_service_type; 4915 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4916 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); 4917 return true; 4918 } 4919 4920 if (connection->request_role != HCI_ROLE_INVALID){ 4921 hci_role_t role = connection->request_role; 4922 connection->request_role = HCI_ROLE_INVALID; 4923 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4924 return true; 4925 } 4926 #endif 4927 4928 #ifdef ENABLE_BLE 4929 switch (connection->le_con_parameter_update_state){ 4930 // response to L2CAP CON PARAMETER UPDATE REQUEST 4931 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4932 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4933 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4934 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4935 0x0000, 0xffff); 4936 return true; 4937 case CON_PARAMETER_UPDATE_REPLY: 4938 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4939 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4940 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4941 0x0000, 0xffff); 4942 return true; 4943 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4944 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4945 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4946 return true; 4947 default: 4948 break; 4949 } 4950 if (connection->le_phy_update_all_phys != 0xffu){ 4951 uint8_t all_phys = connection->le_phy_update_all_phys; 4952 connection->le_phy_update_all_phys = 0xff; 4953 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); 4954 return true; 4955 } 4956 #endif 4957 } 4958 return false; 4959 } 4960 4961 static void hci_run(void){ 4962 4963 bool done; 4964 4965 // send continuation fragments first, as they block the prepared packet buffer 4966 done = hci_run_acl_fragments(); 4967 if (done) return; 4968 4969 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4970 // send host num completed packets next as they don't require num_cmd_packets > 0 4971 if (!hci_can_send_comand_packet_transport()) return; 4972 if (hci_stack->host_completed_packets){ 4973 hci_host_num_completed_packets(); 4974 return; 4975 } 4976 #endif 4977 4978 if (!hci_can_send_command_packet_now()) return; 4979 4980 // global/non-connection oriented commands 4981 4982 4983 #ifdef ENABLE_CLASSIC 4984 // general gap classic 4985 done = hci_run_general_gap_classic(); 4986 if (done) return; 4987 #endif 4988 4989 #ifdef ENABLE_BLE 4990 // general gap le 4991 done = hci_run_general_gap_le(); 4992 if (done) return; 4993 #endif 4994 4995 // send pending HCI commands 4996 done = hci_run_general_pending_commands(); 4997 if (done) return; 4998 4999 // stack state sub statemachines 5000 hci_connection_t * connection; 5001 switch (hci_stack->state){ 5002 case HCI_STATE_INITIALIZING: 5003 hci_initializing_run(); 5004 break; 5005 5006 case HCI_STATE_HALTING: 5007 5008 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5009 switch (hci_stack->substate){ 5010 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5011 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5012 5013 #ifdef ENABLE_BLE 5014 #ifdef ENABLE_LE_CENTRAL 5015 // free whitelist entries 5016 { 5017 btstack_linked_list_iterator_t lit; 5018 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5019 while (btstack_linked_list_iterator_has_next(&lit)){ 5020 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5021 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5022 btstack_memory_whitelist_entry_free(entry); 5023 } 5024 } 5025 #endif 5026 #endif 5027 // close all open connections 5028 connection = (hci_connection_t *) hci_stack->connections; 5029 if (connection){ 5030 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5031 if (!hci_can_send_command_packet_now()) return; 5032 5033 // check state 5034 if (connection->state == SENT_DISCONNECT) return; 5035 connection->state = SENT_DISCONNECT; 5036 5037 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5038 5039 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5040 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5041 5042 // ... which would be ignored anyway as we shutdown (free) the connection now 5043 hci_shutdown_connection(connection); 5044 5045 // finally, send the disconnect command 5046 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5047 return; 5048 } 5049 5050 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5051 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5052 log_info("HCI_STATE_HALTING: wait 50 ms"); 5053 hci_stack->substate = HCI_HALTING_W4_TIMER; 5054 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5055 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5056 btstack_run_loop_add_timer(&hci_stack->timeout); 5057 break; 5058 } 5059 5060 /* fall through */ 5061 5062 case HCI_HALTING_CLOSE: 5063 log_info("HCI_STATE_HALTING, calling off"); 5064 5065 // switch mode 5066 hci_power_control_off(); 5067 5068 log_info("HCI_STATE_HALTING, emitting state"); 5069 hci_emit_state(); 5070 log_info("HCI_STATE_HALTING, done"); 5071 break; 5072 5073 case HCI_HALTING_W4_TIMER: 5074 // keep waiting 5075 5076 break; 5077 default: 5078 break; 5079 } 5080 5081 break; 5082 5083 case HCI_STATE_FALLING_ASLEEP: 5084 switch(hci_stack->substate) { 5085 case HCI_FALLING_ASLEEP_DISCONNECT: 5086 log_info("HCI_STATE_FALLING_ASLEEP"); 5087 // close all open connections 5088 connection = (hci_connection_t *) hci_stack->connections; 5089 if (connection){ 5090 5091 // send disconnect 5092 if (!hci_can_send_command_packet_now()) return; 5093 5094 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5095 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5096 5097 // send disconnected event right away - causes higher layer connections to get closed, too. 5098 hci_shutdown_connection(connection); 5099 return; 5100 } 5101 5102 if (hci_classic_supported()){ 5103 // disable page and inquiry scan 5104 if (!hci_can_send_command_packet_now()) return; 5105 5106 log_info("HCI_STATE_HALTING, disabling inq scans"); 5107 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5108 5109 // continue in next sub state 5110 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5111 break; 5112 } 5113 5114 /* fall through */ 5115 5116 case HCI_FALLING_ASLEEP_COMPLETE: 5117 log_info("HCI_STATE_HALTING, calling sleep"); 5118 // switch mode 5119 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5120 hci_emit_state(); 5121 break; 5122 5123 default: 5124 break; 5125 } 5126 break; 5127 5128 default: 5129 break; 5130 } 5131 } 5132 5133 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5134 // house-keeping 5135 5136 #ifdef ENABLE_CLASSIC 5137 bd_addr_t addr; 5138 hci_connection_t * conn; 5139 #endif 5140 #ifdef ENABLE_LE_CENTRAL 5141 uint8_t initiator_filter_policy; 5142 #endif 5143 5144 uint16_t opcode = little_endian_read_16(packet, 0); 5145 switch (opcode) { 5146 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5147 hci_stack->loopback_mode = packet[3]; 5148 break; 5149 5150 #ifdef ENABLE_CLASSIC 5151 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5152 reverse_bd_addr(&packet[3], addr); 5153 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5154 5155 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5156 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5157 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5158 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5159 } 5160 5161 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5162 if (!conn) { 5163 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5164 if (!conn) { 5165 // notify client that alloc failed 5166 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5167 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5168 } 5169 conn->state = SEND_CREATE_CONNECTION; 5170 conn->role = HCI_ROLE_MASTER; 5171 } 5172 5173 conn->con_handle = HCI_CON_HANDLE_INVALID; 5174 conn->role = HCI_ROLE_INVALID; 5175 5176 log_info("conn state %u", conn->state); 5177 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5178 switch (conn->state) { 5179 // if connection active exists 5180 case OPEN: 5181 // and OPEN, emit connection complete command 5182 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5183 // packet not sent to controller 5184 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5185 case RECEIVED_DISCONNECTION_COMPLETE: 5186 // create connection triggered in disconnect complete event, let's do it now 5187 break; 5188 case SEND_CREATE_CONNECTION: 5189 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5190 break; 5191 default: 5192 // otherwise, just ignore as it is already in the open process 5193 // packet not sent to controller 5194 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5195 } 5196 conn->state = SENT_CREATE_CONNECTION; 5197 5198 // track outgoing connection 5199 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5200 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5201 break; 5202 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5203 if (hci_stack->link_key_db) { 5204 reverse_bd_addr(&packet[3], addr); 5205 hci_stack->link_key_db->delete_link_key(addr); 5206 } 5207 break; 5208 5209 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5210 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5211 // setup_synchronous_connection? Voice setting at offset 22 5212 // TODO: compare to current setting if sco connection already active 5213 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5214 break; 5215 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5216 // accept_synchronus_connection? Voice setting at offset 18 5217 // TODO: compare to current setting if sco connection already active 5218 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5219 break; 5220 #endif 5221 #endif 5222 5223 #ifdef ENABLE_BLE 5224 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5225 hci_stack->le_random_address_set = 1; 5226 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5227 break; 5228 #ifdef ENABLE_LE_PERIPHERAL 5229 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5230 hci_stack->le_advertisements_active = packet[3] != 0; 5231 break; 5232 #endif 5233 #ifdef ENABLE_LE_CENTRAL 5234 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5235 // white list used? 5236 initiator_filter_policy = packet[7]; 5237 switch (initiator_filter_policy) { 5238 case 0: 5239 // whitelist not used 5240 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5241 break; 5242 case 1: 5243 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5244 break; 5245 default: 5246 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5247 break; 5248 } 5249 // track outgoing connection 5250 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5251 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5252 break; 5253 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5254 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5255 break; 5256 #endif 5257 #endif 5258 default: 5259 break; 5260 } 5261 5262 hci_stack->num_cmd_packets--; 5263 5264 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5265 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5266 if (err != 0){ 5267 return ERROR_CODE_HARDWARE_FAILURE; 5268 } 5269 return ERROR_CODE_SUCCESS; 5270 } 5271 5272 // disconnect because of security block 5273 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5274 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5275 if (!connection) return; 5276 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5277 } 5278 5279 5280 // Configure Secure Simple Pairing 5281 5282 #ifdef ENABLE_CLASSIC 5283 5284 // enable will enable SSP during init 5285 void gap_ssp_set_enable(int enable){ 5286 hci_stack->ssp_enable = enable; 5287 } 5288 5289 static int hci_local_ssp_activated(void){ 5290 return gap_ssp_supported() && hci_stack->ssp_enable; 5291 } 5292 5293 // if set, BTstack will respond to io capability request using authentication requirement 5294 void gap_ssp_set_io_capability(int io_capability){ 5295 hci_stack->ssp_io_capability = io_capability; 5296 } 5297 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5298 hci_stack->ssp_authentication_requirement = authentication_requirement; 5299 } 5300 5301 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5302 void gap_ssp_set_auto_accept(int auto_accept){ 5303 hci_stack->ssp_auto_accept = auto_accept; 5304 } 5305 5306 void gap_secure_connections_enable(bool enable){ 5307 hci_stack->secure_connections_enable = enable; 5308 } 5309 5310 #endif 5311 5312 // va_list part of hci_send_cmd 5313 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5314 if (!hci_can_send_command_packet_now()){ 5315 log_error("hci_send_cmd called but cannot send packet now"); 5316 return ERROR_CODE_COMMAND_DISALLOWED; 5317 } 5318 5319 // for HCI INITIALIZATION 5320 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5321 hci_stack->last_cmd_opcode = cmd->opcode; 5322 5323 hci_reserve_packet_buffer(); 5324 uint8_t * packet = hci_stack->hci_packet_buffer; 5325 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5326 uint8_t status = hci_send_cmd_packet(packet, size); 5327 5328 // release packet buffer on error or for synchronous transport implementations 5329 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5330 hci_release_packet_buffer(); 5331 hci_emit_transport_packet_sent(); 5332 } 5333 5334 return status; 5335 } 5336 5337 /** 5338 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5339 */ 5340 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5341 va_list argptr; 5342 va_start(argptr, cmd); 5343 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5344 va_end(argptr); 5345 return status; 5346 } 5347 5348 // Create various non-HCI events. 5349 // TODO: generalize, use table similar to hci_create_command 5350 5351 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5352 // dump packet 5353 if (dump) { 5354 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5355 } 5356 5357 // dispatch to all event handlers 5358 btstack_linked_list_iterator_t it; 5359 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5360 while (btstack_linked_list_iterator_has_next(&it)){ 5361 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5362 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5363 } 5364 } 5365 5366 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5367 if (!hci_stack->acl_packet_handler) return; 5368 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5369 } 5370 5371 #ifdef ENABLE_CLASSIC 5372 static void hci_notify_if_sco_can_send_now(void){ 5373 // notify SCO sender if waiting 5374 if (!hci_stack->sco_waiting_for_can_send_now) return; 5375 if (hci_can_send_sco_packet_now()){ 5376 hci_stack->sco_waiting_for_can_send_now = 0; 5377 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5378 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5379 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5380 } 5381 } 5382 5383 // parsing end emitting has been merged to reduce code size 5384 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5385 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5386 5387 uint8_t * eir_data; 5388 ad_context_t context; 5389 const uint8_t * name; 5390 uint8_t name_len; 5391 5392 if (size < 3) return; 5393 5394 int event_type = hci_event_packet_get_type(packet); 5395 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5396 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5397 5398 switch (event_type){ 5399 case HCI_EVENT_INQUIRY_RESULT: 5400 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5401 if (size != (3 + (num_responses * 14))) return; 5402 break; 5403 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5404 if (size != 257) return; 5405 if (num_responses != 1) return; 5406 break; 5407 default: 5408 return; 5409 } 5410 5411 // event[1] is set at the end 5412 int i; 5413 for (i=0; i<num_responses;i++){ 5414 memset(event, 0, sizeof(event)); 5415 event[0] = GAP_EVENT_INQUIRY_RESULT; 5416 uint8_t event_size = 27; // if name is not set by EIR 5417 5418 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5419 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5420 (void)memcpy(&event[9], 5421 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5422 3); // class of device 5423 (void)memcpy(&event[12], 5424 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5425 2); // clock offset 5426 5427 switch (event_type){ 5428 case HCI_EVENT_INQUIRY_RESULT: 5429 // 14,15,16,17 = 0, size 18 5430 break; 5431 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5432 event[14] = 1; 5433 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5434 // 16,17 = 0, size 18 5435 break; 5436 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5437 event[14] = 1; 5438 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5439 // EIR packets only contain a single inquiry response 5440 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5441 name = NULL; 5442 // Iterate over EIR data 5443 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5444 uint8_t data_type = ad_iterator_get_data_type(&context); 5445 uint8_t data_size = ad_iterator_get_data_len(&context); 5446 const uint8_t * data = ad_iterator_get_data(&context); 5447 // Prefer Complete Local Name over Shortened Local Name 5448 switch (data_type){ 5449 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5450 if (name) continue; 5451 /* fall through */ 5452 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5453 name = data; 5454 name_len = data_size; 5455 break; 5456 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5457 if (data_size != 8) break; 5458 event[16] = 1; 5459 memcpy(&event[17], data, 8); 5460 break; 5461 default: 5462 break; 5463 } 5464 } 5465 if (name){ 5466 event[25] = 1; 5467 // truncate name if needed 5468 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5469 event[26] = len; 5470 (void)memcpy(&event[27], name, len); 5471 event_size += len; 5472 } 5473 break; 5474 default: 5475 return; 5476 } 5477 event[1] = event_size - 2; 5478 hci_emit_event(event, event_size, 1); 5479 } 5480 } 5481 #endif 5482 5483 void hci_emit_state(void){ 5484 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5485 uint8_t event[3]; 5486 event[0] = BTSTACK_EVENT_STATE; 5487 event[1] = sizeof(event) - 2u; 5488 event[2] = hci_stack->state; 5489 hci_emit_event(event, sizeof(event), 1); 5490 } 5491 5492 #ifdef ENABLE_CLASSIC 5493 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5494 uint8_t event[13]; 5495 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5496 event[1] = sizeof(event) - 2; 5497 event[2] = status; 5498 little_endian_store_16(event, 3, con_handle); 5499 reverse_bd_addr(address, &event[5]); 5500 event[11] = 1; // ACL connection 5501 event[12] = 0; // encryption disabled 5502 hci_emit_event(event, sizeof(event), 1); 5503 } 5504 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5505 if (disable_l2cap_timeouts) return; 5506 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5507 uint8_t event[4]; 5508 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5509 event[1] = sizeof(event) - 2; 5510 little_endian_store_16(event, 2, conn->con_handle); 5511 hci_emit_event(event, sizeof(event), 1); 5512 } 5513 #endif 5514 5515 #ifdef ENABLE_BLE 5516 #ifdef ENABLE_LE_CENTRAL 5517 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){ 5518 uint8_t event[21]; 5519 event[0] = HCI_EVENT_LE_META; 5520 event[1] = sizeof(event) - 2u; 5521 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5522 event[3] = status; 5523 little_endian_store_16(event, 4, con_handle); 5524 event[6] = 0; // TODO: role 5525 event[7] = address_type; 5526 reverse_bd_addr(address, &event[8]); 5527 little_endian_store_16(event, 14, 0); // interval 5528 little_endian_store_16(event, 16, 0); // latency 5529 little_endian_store_16(event, 18, 0); // supervision timeout 5530 event[20] = 0; // master clock accuracy 5531 hci_emit_event(event, sizeof(event), 1); 5532 } 5533 #endif 5534 #endif 5535 5536 static void hci_emit_transport_packet_sent(void){ 5537 // notify upper stack that it might be possible to send again 5538 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5539 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5540 } 5541 5542 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5543 uint8_t event[6]; 5544 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5545 event[1] = sizeof(event) - 2u; 5546 event[2] = 0; // status = OK 5547 little_endian_store_16(event, 3, con_handle); 5548 event[5] = reason; 5549 hci_emit_event(event, sizeof(event), 1); 5550 } 5551 5552 static void hci_emit_nr_connections_changed(void){ 5553 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5554 uint8_t event[3]; 5555 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5556 event[1] = sizeof(event) - 2u; 5557 event[2] = nr_hci_connections(); 5558 hci_emit_event(event, sizeof(event), 1); 5559 } 5560 5561 static void hci_emit_hci_open_failed(void){ 5562 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5563 uint8_t event[2]; 5564 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5565 event[1] = sizeof(event) - 2u; 5566 hci_emit_event(event, sizeof(event), 1); 5567 } 5568 5569 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5570 log_info("hci_emit_dedicated_bonding_result %u ", status); 5571 uint8_t event[9]; 5572 int pos = 0; 5573 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5574 event[pos++] = sizeof(event) - 2u; 5575 event[pos++] = status; 5576 reverse_bd_addr(address, &event[pos]); 5577 hci_emit_event(event, sizeof(event), 1); 5578 } 5579 5580 5581 #ifdef ENABLE_CLASSIC 5582 5583 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5584 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5585 uint8_t event[5]; 5586 int pos = 0; 5587 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5588 event[pos++] = sizeof(event) - 2; 5589 little_endian_store_16(event, 2, con_handle); 5590 pos += 2; 5591 event[pos++] = level; 5592 hci_emit_event(event, sizeof(event), 1); 5593 } 5594 5595 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5596 if (!connection) return LEVEL_0; 5597 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5598 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5599 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5600 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5601 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5602 // LEVEL 4 always requires 128 bit encrytion key size 5603 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5604 security_level = LEVEL_3; 5605 } 5606 return security_level; 5607 } 5608 5609 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5610 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5611 uint8_t event[3]; 5612 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5613 event[1] = sizeof(event) - 2; 5614 event[2] = enabled; 5615 hci_emit_event(event, sizeof(event), 1); 5616 } 5617 5618 // query if remote side supports eSCO 5619 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5620 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5621 if (!connection) return false; 5622 return (connection->remote_supported_features[0] & 1) != 0; 5623 } 5624 5625 static bool hci_ssp_supported(hci_connection_t * connection){ 5626 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5627 return (connection->bonding_flags & mask) == mask; 5628 } 5629 5630 // query if remote side supports SSP 5631 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5632 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5633 if (!connection) return false; 5634 return hci_ssp_supported(connection) ? 1 : 0; 5635 } 5636 5637 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5638 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5639 } 5640 5641 // GAP API 5642 /** 5643 * @bbrief enable/disable bonding. default is enabled 5644 * @praram enabled 5645 */ 5646 void gap_set_bondable_mode(int enable){ 5647 hci_stack->bondable = enable ? 1 : 0; 5648 } 5649 /** 5650 * @brief Get bondable mode. 5651 * @return 1 if bondable 5652 */ 5653 int gap_get_bondable_mode(void){ 5654 return hci_stack->bondable; 5655 } 5656 5657 /** 5658 * @brief map link keys to security levels 5659 */ 5660 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5661 switch (link_key_type){ 5662 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5663 return LEVEL_4; 5664 case COMBINATION_KEY: 5665 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5666 return LEVEL_3; 5667 default: 5668 return LEVEL_2; 5669 } 5670 } 5671 5672 /** 5673 * @brief map link keys to secure connection yes/no 5674 */ 5675 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5676 switch (link_key_type){ 5677 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5678 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5679 return 1; 5680 default: 5681 return 0; 5682 } 5683 } 5684 5685 /** 5686 * @brief map link keys to authenticated 5687 */ 5688 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5689 switch (link_key_type){ 5690 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5691 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5692 return 1; 5693 default: 5694 return 0; 5695 } 5696 } 5697 5698 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5699 log_info("gap_mitm_protection_required_for_security_level %u", level); 5700 return level > LEVEL_2; 5701 } 5702 5703 /** 5704 * @brief get current security level 5705 */ 5706 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5707 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5708 if (!connection) return LEVEL_0; 5709 return gap_security_level_for_connection(connection); 5710 } 5711 5712 /** 5713 * @brief request connection to device to 5714 * @result GAP_AUTHENTICATION_RESULT 5715 */ 5716 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5717 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5718 if (!connection){ 5719 hci_emit_security_level(con_handle, LEVEL_0); 5720 return; 5721 } 5722 5723 btstack_assert(hci_is_le_connection(connection) == false); 5724 5725 // 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) 5726 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5727 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5728 requested_level = LEVEL_4; 5729 } 5730 5731 gap_security_level_t current_level = gap_security_level(con_handle); 5732 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5733 requested_level, connection->requested_security_level, current_level); 5734 5735 // authentication active if authentication request was sent or planned level > 0 5736 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5737 if (authentication_active){ 5738 // authentication already active 5739 if (connection->requested_security_level < requested_level){ 5740 // increase requested level as new level is higher 5741 // TODO: handle re-authentication when done 5742 connection->requested_security_level = requested_level; 5743 } 5744 } else { 5745 // no request active, notify if security sufficient 5746 if (requested_level <= current_level){ 5747 hci_emit_security_level(con_handle, current_level); 5748 return; 5749 } 5750 5751 // store request 5752 connection->requested_security_level = requested_level; 5753 5754 // start to authenticate connection 5755 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5756 hci_run(); 5757 } 5758 } 5759 5760 /** 5761 * @brief start dedicated bonding with device. disconnect after bonding 5762 * @param device 5763 * @param request MITM protection 5764 * @result GAP_DEDICATED_BONDING_COMPLETE 5765 */ 5766 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5767 5768 // create connection state machine 5769 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5770 5771 if (!connection){ 5772 return BTSTACK_MEMORY_ALLOC_FAILED; 5773 } 5774 5775 // delete linkn key 5776 gap_drop_link_key_for_bd_addr(device); 5777 5778 // configure LEVEL_2/3, dedicated bonding 5779 connection->state = SEND_CREATE_CONNECTION; 5780 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5781 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5782 connection->bonding_flags = BONDING_DEDICATED; 5783 5784 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5785 5786 // handle: connnection failure (connection complete != ok) 5787 // handle: authentication failure 5788 // handle: disconnect on done 5789 5790 hci_run(); 5791 5792 return 0; 5793 } 5794 5795 void gap_set_local_name(const char * local_name){ 5796 hci_stack->local_name = local_name; 5797 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5798 // also update EIR if not set by user 5799 if (hci_stack->eir_data == NULL){ 5800 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5801 } 5802 hci_run(); 5803 } 5804 #endif 5805 5806 5807 #ifdef ENABLE_BLE 5808 5809 #ifdef ENABLE_LE_CENTRAL 5810 void gap_start_scan(void){ 5811 hci_stack->le_scanning_enabled = true; 5812 hci_run(); 5813 } 5814 5815 void gap_stop_scan(void){ 5816 hci_stack->le_scanning_enabled = false; 5817 hci_run(); 5818 } 5819 5820 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5821 hci_stack->le_scan_type = scan_type; 5822 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5823 hci_stack->le_scan_interval = scan_interval; 5824 hci_stack->le_scan_window = scan_window; 5825 hci_stack->le_scanning_param_update = true; 5826 hci_run(); 5827 } 5828 5829 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5830 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5831 } 5832 5833 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5834 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5835 if (!conn){ 5836 // disallow if le connection is already outgoing 5837 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5838 log_error("le connection already active"); 5839 return ERROR_CODE_COMMAND_DISALLOWED; 5840 } 5841 5842 log_info("gap_connect: no connection exists yet, creating context"); 5843 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5844 if (!conn){ 5845 // notify client that alloc failed 5846 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5847 log_info("gap_connect: failed to alloc hci_connection_t"); 5848 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5849 } 5850 5851 // set le connecting state 5852 if (hci_is_le_connection_type(addr_type)){ 5853 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5854 } 5855 5856 conn->state = SEND_CREATE_CONNECTION; 5857 log_info("gap_connect: send create connection next"); 5858 hci_run(); 5859 return ERROR_CODE_SUCCESS; 5860 } 5861 5862 if (!hci_is_le_connection(conn) || 5863 (conn->state == SEND_CREATE_CONNECTION) || 5864 (conn->state == SENT_CREATE_CONNECTION)) { 5865 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5866 log_error("gap_connect: classic connection or connect is already being created"); 5867 return GATT_CLIENT_IN_WRONG_STATE; 5868 } 5869 5870 // check if connection was just disconnected 5871 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5872 log_info("gap_connect: send create connection (again)"); 5873 conn->state = SEND_CREATE_CONNECTION; 5874 hci_run(); 5875 return ERROR_CODE_SUCCESS; 5876 } 5877 5878 log_info("gap_connect: context exists with state %u", conn->state); 5879 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5880 hci_run(); 5881 return ERROR_CODE_SUCCESS; 5882 } 5883 5884 // @assumption: only a single outgoing LE Connection exists 5885 static hci_connection_t * gap_get_outgoing_connection(void){ 5886 btstack_linked_item_t *it; 5887 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5888 hci_connection_t * conn = (hci_connection_t *) it; 5889 if (!hci_is_le_connection(conn)) continue; 5890 switch (conn->state){ 5891 case SEND_CREATE_CONNECTION: 5892 case SENT_CREATE_CONNECTION: 5893 case SENT_CANCEL_CONNECTION: 5894 return conn; 5895 default: 5896 break; 5897 }; 5898 } 5899 return NULL; 5900 } 5901 5902 uint8_t gap_connect_cancel(void){ 5903 hci_connection_t * conn = gap_get_outgoing_connection(); 5904 if (!conn) return 0; 5905 switch (conn->state){ 5906 case SEND_CREATE_CONNECTION: 5907 // skip sending create connection and emit event instead 5908 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5909 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5910 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5911 btstack_memory_hci_connection_free( conn ); 5912 break; 5913 case SENT_CREATE_CONNECTION: 5914 // request to send cancel connection 5915 conn->state = SEND_CANCEL_CONNECTION; 5916 hci_run(); 5917 break; 5918 default: 5919 break; 5920 } 5921 return 0; 5922 } 5923 #endif 5924 5925 #ifdef ENABLE_LE_CENTRAL 5926 /** 5927 * @brief Set connection parameters for outgoing connections 5928 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5929 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5930 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5931 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5932 * @param conn_latency, default: 4 5933 * @param supervision_timeout (unit: 10ms), default: 720 ms 5934 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5935 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5936 */ 5937 5938 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5939 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5940 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5941 hci_stack->le_connection_scan_interval = conn_scan_interval; 5942 hci_stack->le_connection_scan_window = conn_scan_window; 5943 hci_stack->le_connection_interval_min = conn_interval_min; 5944 hci_stack->le_connection_interval_max = conn_interval_max; 5945 hci_stack->le_connection_latency = conn_latency; 5946 hci_stack->le_supervision_timeout = supervision_timeout; 5947 hci_stack->le_minimum_ce_length = min_ce_length; 5948 hci_stack->le_maximum_ce_length = max_ce_length; 5949 } 5950 #endif 5951 5952 /** 5953 * @brief Updates the connection parameters for a given LE connection 5954 * @param handle 5955 * @param conn_interval_min (unit: 1.25ms) 5956 * @param conn_interval_max (unit: 1.25ms) 5957 * @param conn_latency 5958 * @param supervision_timeout (unit: 10ms) 5959 * @returns 0 if ok 5960 */ 5961 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5962 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5963 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5964 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5965 connection->le_conn_interval_min = conn_interval_min; 5966 connection->le_conn_interval_max = conn_interval_max; 5967 connection->le_conn_latency = conn_latency; 5968 connection->le_supervision_timeout = supervision_timeout; 5969 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5970 hci_run(); 5971 return 0; 5972 } 5973 5974 /** 5975 * @brief Request an update of the connection parameter for a given LE connection 5976 * @param handle 5977 * @param conn_interval_min (unit: 1.25ms) 5978 * @param conn_interval_max (unit: 1.25ms) 5979 * @param conn_latency 5980 * @param supervision_timeout (unit: 10ms) 5981 * @returns 0 if ok 5982 */ 5983 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5984 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5985 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5986 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5987 connection->le_conn_interval_min = conn_interval_min; 5988 connection->le_conn_interval_max = conn_interval_max; 5989 connection->le_conn_latency = conn_latency; 5990 connection->le_supervision_timeout = supervision_timeout; 5991 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5992 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5993 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5994 return 0; 5995 } 5996 5997 #ifdef ENABLE_LE_PERIPHERAL 5998 5999 /** 6000 * @brief Set Advertisement Data 6001 * @param advertising_data_length 6002 * @param advertising_data (max 31 octets) 6003 * @note data is not copied, pointer has to stay valid 6004 */ 6005 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6006 hci_stack->le_advertisements_data_len = advertising_data_length; 6007 hci_stack->le_advertisements_data = advertising_data; 6008 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6009 hci_run(); 6010 } 6011 6012 /** 6013 * @brief Set Scan Response Data 6014 * @param advertising_data_length 6015 * @param advertising_data (max 31 octets) 6016 * @note data is not copied, pointer has to stay valid 6017 */ 6018 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6019 hci_stack->le_scan_response_data_len = scan_response_data_length; 6020 hci_stack->le_scan_response_data = scan_response_data; 6021 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6022 hci_run(); 6023 } 6024 6025 /** 6026 * @brief Set Advertisement Parameters 6027 * @param adv_int_min 6028 * @param adv_int_max 6029 * @param adv_type 6030 * @param direct_address_type 6031 * @param direct_address 6032 * @param channel_map 6033 * @param filter_policy 6034 * 6035 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6036 */ 6037 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6038 uint8_t direct_address_typ, bd_addr_t direct_address, 6039 uint8_t channel_map, uint8_t filter_policy) { 6040 6041 hci_stack->le_advertisements_interval_min = adv_int_min; 6042 hci_stack->le_advertisements_interval_max = adv_int_max; 6043 hci_stack->le_advertisements_type = adv_type; 6044 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6045 hci_stack->le_advertisements_channel_map = channel_map; 6046 hci_stack->le_advertisements_filter_policy = filter_policy; 6047 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6048 6); 6049 6050 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6051 hci_run(); 6052 } 6053 6054 /** 6055 * @brief Enable/Disable Advertisements 6056 * @param enabled 6057 */ 6058 void gap_advertisements_enable(int enabled){ 6059 hci_stack->le_advertisements_enabled = enabled != 0; 6060 hci_update_advertisements_enabled_for_current_roles(); 6061 hci_run(); 6062 } 6063 6064 #endif 6065 6066 void hci_le_set_own_address_type(uint8_t own_address_type){ 6067 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6068 if (own_address_type == hci_stack->le_own_addr_type) return; 6069 hci_stack->le_own_addr_type = own_address_type; 6070 6071 #ifdef ENABLE_LE_PERIPHERAL 6072 // update advertisement parameters, too 6073 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6074 hci_run(); 6075 #endif 6076 #ifdef ENABLE_LE_CENTRAL 6077 // note: we don't update scan parameters or modify ongoing connection attempts 6078 #endif 6079 } 6080 6081 #endif 6082 6083 uint8_t gap_disconnect(hci_con_handle_t handle){ 6084 hci_connection_t * conn = hci_connection_for_handle(handle); 6085 if (!conn){ 6086 hci_emit_disconnection_complete(handle, 0); 6087 return 0; 6088 } 6089 // ignore if already disconnected 6090 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6091 return 0; 6092 } 6093 conn->state = SEND_DISCONNECT; 6094 hci_run(); 6095 return 0; 6096 } 6097 6098 int gap_read_rssi(hci_con_handle_t con_handle){ 6099 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6100 if (hci_connection == NULL) return 0; 6101 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6102 hci_run(); 6103 return 1; 6104 } 6105 6106 /** 6107 * @brief Get connection type 6108 * @param con_handle 6109 * @result connection_type 6110 */ 6111 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6112 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6113 if (!conn) return GAP_CONNECTION_INVALID; 6114 switch (conn->address_type){ 6115 case BD_ADDR_TYPE_LE_PUBLIC: 6116 case BD_ADDR_TYPE_LE_RANDOM: 6117 return GAP_CONNECTION_LE; 6118 case BD_ADDR_TYPE_SCO: 6119 return GAP_CONNECTION_SCO; 6120 case BD_ADDR_TYPE_ACL: 6121 return GAP_CONNECTION_ACL; 6122 default: 6123 return GAP_CONNECTION_INVALID; 6124 } 6125 } 6126 6127 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6128 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6129 if (!conn) return HCI_ROLE_INVALID; 6130 return (hci_role_t) conn->role; 6131 } 6132 6133 6134 #ifdef ENABLE_CLASSIC 6135 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6136 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6137 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6138 conn->request_role = role; 6139 hci_run(); 6140 return ERROR_CODE_SUCCESS; 6141 } 6142 #endif 6143 6144 #ifdef ENABLE_BLE 6145 6146 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){ 6147 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6148 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6149 6150 conn->le_phy_update_all_phys = all_phys; 6151 conn->le_phy_update_tx_phys = tx_phys; 6152 conn->le_phy_update_rx_phys = rx_phys; 6153 conn->le_phy_update_phy_options = phy_options; 6154 6155 hci_run(); 6156 6157 return 0; 6158 } 6159 6160 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6161 // check if already in list 6162 btstack_linked_list_iterator_t it; 6163 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6164 while (btstack_linked_list_iterator_has_next(&it)) { 6165 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6166 if (entry->address_type != address_type) { 6167 continue; 6168 } 6169 if (memcmp(entry->address, address, 6) != 0) { 6170 continue; 6171 } 6172 // disallow if already scheduled to add 6173 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6174 return ERROR_CODE_COMMAND_DISALLOWED; 6175 } 6176 // still on controller, but scheduled to remove -> re-add 6177 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6178 return ERROR_CODE_SUCCESS; 6179 } 6180 // alloc and add to list 6181 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6182 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6183 entry->address_type = address_type; 6184 (void)memcpy(entry->address, address, 6); 6185 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6186 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6187 return ERROR_CODE_SUCCESS; 6188 } 6189 6190 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6191 btstack_linked_list_iterator_t it; 6192 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6193 while (btstack_linked_list_iterator_has_next(&it)){ 6194 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6195 if (entry->address_type != address_type) { 6196 continue; 6197 } 6198 if (memcmp(entry->address, address, 6) != 0) { 6199 continue; 6200 } 6201 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6202 // remove from controller if already present 6203 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6204 } else { 6205 // directly remove entry from whitelist 6206 btstack_linked_list_iterator_remove(&it); 6207 btstack_memory_whitelist_entry_free(entry); 6208 } 6209 return ERROR_CODE_SUCCESS; 6210 } 6211 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6212 } 6213 6214 static void hci_whitelist_clear(void){ 6215 btstack_linked_list_iterator_t it; 6216 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6217 while (btstack_linked_list_iterator_has_next(&it)){ 6218 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6219 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6220 // remove from controller if already present 6221 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6222 continue; 6223 } 6224 // directly remove entry from whitelist 6225 btstack_linked_list_iterator_remove(&it); 6226 btstack_memory_whitelist_entry_free(entry); 6227 } 6228 } 6229 6230 /** 6231 * @brief Clear Whitelist 6232 * @returns 0 if ok 6233 */ 6234 uint8_t gap_whitelist_clear(void){ 6235 hci_whitelist_clear(); 6236 hci_run(); 6237 return ERROR_CODE_SUCCESS; 6238 } 6239 6240 /** 6241 * @brief Add Device to Whitelist 6242 * @param address_typ 6243 * @param address 6244 * @returns 0 if ok 6245 */ 6246 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6247 uint8_t status = hci_whitelist_add(address_type, address); 6248 if (status){ 6249 return status; 6250 } 6251 hci_run(); 6252 return ERROR_CODE_SUCCESS; 6253 } 6254 6255 /** 6256 * @brief Remove Device from Whitelist 6257 * @param address_typ 6258 * @param address 6259 * @returns 0 if ok 6260 */ 6261 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6262 uint8_t status = hci_whitelist_remove(address_type, address); 6263 if (status){ 6264 return status; 6265 } 6266 hci_run(); 6267 return ERROR_CODE_SUCCESS; 6268 } 6269 6270 #ifdef ENABLE_LE_CENTRAL 6271 /** 6272 * @brief Connect with Whitelist 6273 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6274 * @returns - if ok 6275 */ 6276 uint8_t gap_connect_with_whitelist(void){ 6277 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6278 return ERROR_CODE_COMMAND_DISALLOWED; 6279 } 6280 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6281 hci_run(); 6282 return ERROR_CODE_SUCCESS; 6283 } 6284 6285 /** 6286 * @brief Auto Connection Establishment - Start Connecting to device 6287 * @param address_typ 6288 * @param address 6289 * @returns 0 if ok 6290 */ 6291 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6292 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6293 return ERROR_CODE_COMMAND_DISALLOWED; 6294 } 6295 6296 uint8_t status = hci_whitelist_add(address_type, address); 6297 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6298 return status; 6299 } 6300 6301 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6302 6303 hci_run(); 6304 return ERROR_CODE_SUCCESS; 6305 } 6306 6307 /** 6308 * @brief Auto Connection Establishment - Stop Connecting to device 6309 * @param address_typ 6310 * @param address 6311 * @returns 0 if ok 6312 */ 6313 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6314 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6315 return ERROR_CODE_COMMAND_DISALLOWED; 6316 } 6317 6318 hci_whitelist_remove(address_type, address); 6319 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6320 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6321 } 6322 hci_run(); 6323 return 0; 6324 } 6325 6326 /** 6327 * @brief Auto Connection Establishment - Stop everything 6328 * @note Convenience function to stop all active auto connection attempts 6329 */ 6330 uint8_t gap_auto_connection_stop_all(void){ 6331 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6332 return ERROR_CODE_COMMAND_DISALLOWED; 6333 } 6334 hci_whitelist_clear(); 6335 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6336 hci_run(); 6337 return ERROR_CODE_SUCCESS; 6338 } 6339 6340 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6341 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6342 if (!conn) return 0; 6343 return conn->le_connection_interval; 6344 } 6345 #endif 6346 #endif 6347 6348 #ifdef ENABLE_CLASSIC 6349 /** 6350 * @brief Set Extended Inquiry Response data 6351 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6352 * @note has to be done before stack starts up 6353 */ 6354 void gap_set_extended_inquiry_response(const uint8_t * data){ 6355 hci_stack->eir_data = data; 6356 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6357 hci_run(); 6358 } 6359 6360 /** 6361 * @brief Start GAP Classic Inquiry 6362 * @param duration in 1.28s units 6363 * @return 0 if ok 6364 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6365 */ 6366 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6367 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6368 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6369 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6370 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6371 } 6372 hci_stack->inquiry_state = duration_in_1280ms_units; 6373 hci_run(); 6374 return 0; 6375 } 6376 6377 /** 6378 * @brief Stop GAP Classic Inquiry 6379 * @returns 0 if ok 6380 */ 6381 int gap_inquiry_stop(void){ 6382 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6383 // emit inquiry complete event, before it even started 6384 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6385 hci_emit_event(event, sizeof(event), 1); 6386 return 0; 6387 } 6388 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6389 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6390 hci_run(); 6391 return 0; 6392 } 6393 6394 void gap_inquiry_set_lap(uint32_t lap){ 6395 hci_stack->inquiry_lap = lap; 6396 } 6397 6398 6399 /** 6400 * @brief Remote Name Request 6401 * @param addr 6402 * @param page_scan_repetition_mode 6403 * @param clock_offset only used when bit 15 is set 6404 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6405 */ 6406 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6407 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6408 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6409 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6410 hci_stack->remote_name_clock_offset = clock_offset; 6411 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6412 hci_run(); 6413 return 0; 6414 } 6415 6416 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6417 hci_stack->gap_pairing_state = state; 6418 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6419 hci_run(); 6420 return 0; 6421 } 6422 6423 /** 6424 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6425 * @param addr 6426 * @param pin_data 6427 * @param pin_len 6428 * @return 0 if ok 6429 */ 6430 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6431 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6432 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6433 hci_stack->gap_pairing_pin_len = pin_len; 6434 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6435 } 6436 6437 /** 6438 * @brief Legacy Pairing Pin Code Response 6439 * @param addr 6440 * @param pin 6441 * @return 0 if ok 6442 */ 6443 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6444 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6445 } 6446 6447 /** 6448 * @brief Abort Legacy Pairing 6449 * @param addr 6450 * @param pin 6451 * @return 0 if ok 6452 */ 6453 int gap_pin_code_negative(bd_addr_t addr){ 6454 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6455 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6456 } 6457 6458 /** 6459 * @brief SSP Passkey Response 6460 * @param addr 6461 * @param passkey 6462 * @return 0 if ok 6463 */ 6464 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6465 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6466 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6467 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6468 } 6469 6470 /** 6471 * @brief Abort SSP Passkey Entry/Pairing 6472 * @param addr 6473 * @param pin 6474 * @return 0 if ok 6475 */ 6476 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6477 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6478 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6479 } 6480 6481 /** 6482 * @brief Accept SSP Numeric Comparison 6483 * @param addr 6484 * @param passkey 6485 * @return 0 if ok 6486 */ 6487 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6488 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6489 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6490 } 6491 6492 /** 6493 * @brief Abort SSP Numeric Comparison/Pairing 6494 * @param addr 6495 * @param pin 6496 * @return 0 if ok 6497 */ 6498 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6499 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6500 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6501 } 6502 6503 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6504 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6505 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6506 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6507 connectionSetAuthenticationFlags(conn, flag); 6508 hci_run(); 6509 return ERROR_CODE_SUCCESS; 6510 } 6511 #endif 6512 6513 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6514 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6515 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6516 } 6517 6518 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6519 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6520 } 6521 #endif 6522 6523 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6524 /** 6525 * @brief Report Remote OOB Data 6526 * @param bd_addr 6527 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6528 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6529 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6530 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6531 */ 6532 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){ 6533 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6534 if (connection == NULL) { 6535 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6536 } 6537 connection->classic_oob_c_192 = c_192; 6538 connection->classic_oob_r_192 = r_192; 6539 6540 // ignore P-256 if not supported by us 6541 if (hci_stack->secure_connections_active){ 6542 connection->classic_oob_c_256 = c_256; 6543 connection->classic_oob_r_256 = r_256; 6544 } 6545 6546 return ERROR_CODE_SUCCESS; 6547 } 6548 /** 6549 * @brief Generate new OOB data 6550 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6551 */ 6552 void gap_ssp_generate_oob_data(void){ 6553 hci_stack->classic_read_local_oob_data = true; 6554 hci_run(); 6555 } 6556 6557 #endif 6558 6559 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6560 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6561 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6562 if (connection == NULL) { 6563 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6564 } 6565 6566 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6567 connection->link_key_type = type; 6568 6569 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6570 } 6571 6572 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6573 /** 6574 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6575 * @param inquiry_mode see bluetooth_defines.h 6576 */ 6577 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6578 hci_stack->inquiry_mode = inquiry_mode; 6579 } 6580 6581 /** 6582 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6583 */ 6584 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6585 hci_stack->sco_voice_setting = voice_setting; 6586 } 6587 6588 /** 6589 * @brief Get SCO Voice Setting 6590 * @return current voice setting 6591 */ 6592 uint16_t hci_get_sco_voice_setting(void){ 6593 return hci_stack->sco_voice_setting; 6594 } 6595 6596 static int hci_have_usb_transport(void){ 6597 if (!hci_stack->hci_transport) return 0; 6598 const char * transport_name = hci_stack->hci_transport->name; 6599 if (!transport_name) return 0; 6600 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6601 } 6602 6603 /** @brief Get SCO packet length for current SCO Voice setting 6604 * @note Using SCO packets of the exact length is required for USB transfer 6605 * @return Length of SCO packets in bytes (not audio frames) 6606 */ 6607 uint16_t hci_get_sco_packet_length(void){ 6608 uint16_t sco_packet_length = 0; 6609 6610 #ifdef ENABLE_SCO_OVER_HCI 6611 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6612 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6613 6614 if (hci_have_usb_transport()){ 6615 // see Core Spec for H2 USB Transfer. 6616 // 3 byte SCO header + 24 bytes per connection 6617 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6618 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6619 } else { 6620 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6621 sco_packet_length = 3 + 60 * multiplier; 6622 // assert that it still fits inside an SCO buffer 6623 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6624 sco_packet_length = 3 + 60; 6625 } 6626 } 6627 #endif 6628 6629 #ifdef HAVE_SCO_TRANSPORT 6630 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6631 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6632 sco_packet_length = 3 + 60 * multiplier; 6633 #endif 6634 return sco_packet_length; 6635 } 6636 6637 /** 6638 * @brief Sets the master/slave policy 6639 * @param policy (0: attempt to become master, 1: let connecting device decide) 6640 */ 6641 void hci_set_master_slave_policy(uint8_t policy){ 6642 hci_stack->master_slave_policy = policy; 6643 } 6644 6645 #endif 6646 6647 HCI_STATE hci_get_state(void){ 6648 return hci_stack->state; 6649 } 6650 6651 #ifdef ENABLE_CLASSIC 6652 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6653 hci_stack->gap_classic_accept_callback = accept_callback; 6654 } 6655 #endif 6656 6657 /** 6658 * @brief Set callback for Bluetooth Hardware Error 6659 */ 6660 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6661 hci_stack->hardware_error_callback = fn; 6662 } 6663 6664 void hci_disconnect_all(void){ 6665 btstack_linked_list_iterator_t it; 6666 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6667 while (btstack_linked_list_iterator_has_next(&it)){ 6668 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6669 if (con->state == SENT_DISCONNECT) continue; 6670 con->state = SEND_DISCONNECT; 6671 } 6672 hci_run(); 6673 } 6674 6675 uint16_t hci_get_manufacturer(void){ 6676 return hci_stack->manufacturer; 6677 } 6678 6679 #ifdef ENABLE_BLE 6680 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6681 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6682 if (!hci_con) return NULL; 6683 return &hci_con->sm_connection; 6684 } 6685 6686 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6687 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6688 #endif 6689 6690 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6691 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6692 if (hci_connection == NULL) return 0; 6693 if (hci_is_le_connection(hci_connection)){ 6694 #ifdef ENABLE_BLE 6695 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6696 if (sm_conn->sm_connection_encrypted) { 6697 return sm_conn->sm_actual_encryption_key_size; 6698 } 6699 #endif 6700 } else { 6701 #ifdef ENABLE_CLASSIC 6702 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6703 return hci_connection->encryption_key_size; 6704 } 6705 #endif 6706 } 6707 return 0; 6708 } 6709 6710 int gap_authenticated(hci_con_handle_t con_handle){ 6711 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6712 if (hci_connection == NULL) return 0; 6713 6714 switch (hci_connection->address_type){ 6715 #ifdef ENABLE_BLE 6716 case BD_ADDR_TYPE_LE_PUBLIC: 6717 case BD_ADDR_TYPE_LE_RANDOM: 6718 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6719 return hci_connection->sm_connection.sm_connection_authenticated; 6720 #endif 6721 #ifdef ENABLE_CLASSIC 6722 case BD_ADDR_TYPE_SCO: 6723 case BD_ADDR_TYPE_ACL: 6724 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6725 #endif 6726 default: 6727 return 0; 6728 } 6729 } 6730 6731 int gap_secure_connection(hci_con_handle_t con_handle){ 6732 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6733 if (hci_connection == NULL) return 0; 6734 6735 switch (hci_connection->address_type){ 6736 #ifdef ENABLE_BLE 6737 case BD_ADDR_TYPE_LE_PUBLIC: 6738 case BD_ADDR_TYPE_LE_RANDOM: 6739 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6740 return hci_connection->sm_connection.sm_connection_sc; 6741 #endif 6742 #ifdef ENABLE_CLASSIC 6743 case BD_ADDR_TYPE_SCO: 6744 case BD_ADDR_TYPE_ACL: 6745 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6746 #endif 6747 default: 6748 return 0; 6749 } 6750 } 6751 6752 bool gap_bonded(hci_con_handle_t con_handle){ 6753 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6754 if (hci_connection == NULL) return 0; 6755 6756 #ifdef ENABLE_CLASSIC 6757 link_key_t link_key; 6758 link_key_type_t link_key_type; 6759 #endif 6760 switch (hci_connection->address_type){ 6761 #ifdef ENABLE_BLE 6762 case BD_ADDR_TYPE_LE_PUBLIC: 6763 case BD_ADDR_TYPE_LE_RANDOM: 6764 return hci_connection->sm_connection.sm_le_db_index >= 0; 6765 #endif 6766 #ifdef ENABLE_CLASSIC 6767 case BD_ADDR_TYPE_SCO: 6768 case BD_ADDR_TYPE_ACL: 6769 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6770 #endif 6771 default: 6772 return false; 6773 } 6774 } 6775 6776 #ifdef ENABLE_BLE 6777 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6778 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6779 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6780 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6781 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6782 return sm_conn->sm_connection_authorization_state; 6783 } 6784 #endif 6785 6786 #ifdef ENABLE_CLASSIC 6787 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){ 6788 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6789 if (!conn) return GAP_CONNECTION_INVALID; 6790 conn->sniff_min_interval = sniff_min_interval; 6791 conn->sniff_max_interval = sniff_max_interval; 6792 conn->sniff_attempt = sniff_attempt; 6793 conn->sniff_timeout = sniff_timeout; 6794 hci_run(); 6795 return 0; 6796 } 6797 6798 /** 6799 * @brief Exit Sniff mode 6800 * @param con_handle 6801 @ @return 0 if ok 6802 */ 6803 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6804 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6805 if (!conn) return GAP_CONNECTION_INVALID; 6806 conn->sniff_min_interval = 0xffff; 6807 hci_run(); 6808 return 0; 6809 } 6810 6811 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){ 6812 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6813 if (!conn) return GAP_CONNECTION_INVALID; 6814 conn->sniff_subrating_max_latency = max_latency; 6815 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6816 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6817 hci_run(); 6818 return ERROR_CODE_SUCCESS; 6819 } 6820 6821 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){ 6822 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6823 if (!conn) return GAP_CONNECTION_INVALID; 6824 conn->qos_service_type = service_type; 6825 conn->qos_token_rate = token_rate; 6826 conn->qos_peak_bandwidth = peak_bandwidth; 6827 conn->qos_latency = latency; 6828 conn->qos_delay_variation = delay_variation; 6829 hci_run(); 6830 return ERROR_CODE_SUCCESS; 6831 } 6832 6833 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6834 hci_stack->new_page_scan_interval = page_scan_interval; 6835 hci_stack->new_page_scan_window = page_scan_window; 6836 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6837 hci_run(); 6838 } 6839 6840 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6841 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6842 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6843 hci_run(); 6844 } 6845 6846 #endif 6847 6848 void hci_halting_defer(void){ 6849 if (hci_stack->state != HCI_STATE_HALTING) return; 6850 switch (hci_stack->substate){ 6851 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6852 case HCI_HALTING_CLOSE: 6853 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6854 break; 6855 default: 6856 break; 6857 } 6858 } 6859 6860 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6861 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6862 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6863 if (le_device_db_index >= le_device_db_max_count()) return; 6864 uint8_t offset = le_device_db_index >> 3; 6865 uint8_t mask = 1 << (le_device_db_index & 7); 6866 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6867 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6868 // note: go back to remove entries, otherwise, a remove + add will skip the add 6869 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6870 } 6871 } 6872 6873 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6874 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6875 if (le_device_db_index >= le_device_db_max_count()) return; 6876 uint8_t offset = le_device_db_index >> 3; 6877 uint8_t mask = 1 << (le_device_db_index & 7); 6878 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6879 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6880 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6881 } 6882 } 6883 6884 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6885 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6886 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6887 } 6888 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6889 // restart le resolving list update 6890 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6891 } 6892 return ERROR_CODE_SUCCESS; 6893 } 6894 #endif 6895 6896 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6897 void hci_setup_test_connections_fuzz(void){ 6898 hci_connection_t * conn; 6899 6900 // default address: 66:55:44:33:00:01 6901 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6902 6903 // setup Controller info 6904 hci_stack->num_cmd_packets = 255; 6905 hci_stack->acl_packets_total_num = 255; 6906 6907 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6908 addr[5] = 0x01; 6909 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 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 incoming Classic SCO connection with con handle 0x0002 6916 addr[5] = 0x02; 6917 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6918 conn->con_handle = addr[5]; 6919 conn->role = HCI_ROLE_SLAVE; 6920 conn->state = RECEIVED_CONNECTION_REQUEST; 6921 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6922 6923 // setup ready Classic ACL connection with con handle 0x0003 6924 addr[5] = 0x03; 6925 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 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 Classic SCO connection with con handle 0x0004 6932 addr[5] = 0x04; 6933 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 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 6939 // setup ready LE ACL connection with con handle 0x005 and public address 6940 addr[5] = 0x05; 6941 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6942 conn->con_handle = addr[5]; 6943 conn->role = HCI_ROLE_SLAVE; 6944 conn->state = OPEN; 6945 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6946 conn->sm_connection.sm_connection_encrypted = 1; 6947 } 6948 6949 void hci_free_connections_fuzz(void){ 6950 btstack_linked_list_iterator_t it; 6951 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6952 while (btstack_linked_list_iterator_has_next(&it)){ 6953 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6954 btstack_linked_list_iterator_remove(&it); 6955 btstack_memory_hci_connection_free(con); 6956 } 6957 } 6958 void hci_simulate_working_fuzz(void){ 6959 hci_init_done(); 6960 hci_stack->num_cmd_packets = 255; 6961 } 6962 #endif 6963