1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // prototypes 136 #ifdef ENABLE_CLASSIC 137 static void hci_update_scan_enable(void); 138 static void hci_emit_discoverable_enabled(uint8_t enabled); 139 static int hci_local_ssp_activated(void); 140 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 141 static bool hci_ssp_supported(hci_connection_t * connection); 142 static void hci_notify_if_sco_can_send_now(void); 143 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 144 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 145 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 146 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 147 static void hci_connection_timestamp(hci_connection_t *connection); 148 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 149 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 150 #endif 151 152 static int hci_power_control_on(void); 153 static void hci_power_control_off(void); 154 static void hci_state_reset(void); 155 static void hci_emit_transport_packet_sent(void); 156 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 157 static void hci_emit_nr_connections_changed(void); 158 static void hci_emit_hci_open_failed(void); 159 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 160 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 161 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 162 static void hci_run(void); 163 static int hci_is_le_connection(hci_connection_t * connection); 164 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 165 166 #ifdef ENABLE_CLASSIC 167 static int hci_have_usb_transport(void); 168 #endif 169 170 #ifdef ENABLE_BLE 171 #ifdef ENABLE_LE_CENTRAL 172 // called from test/ble_client/advertising_data_parser.c 173 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 174 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 175 static hci_connection_t * gap_get_outgoing_connection(void); 176 #endif 177 #endif 178 179 // the STACK is here 180 #ifndef HAVE_MALLOC 181 static hci_stack_t hci_stack_static; 182 #endif 183 static hci_stack_t * hci_stack = NULL; 184 185 #ifdef ENABLE_CLASSIC 186 // default name 187 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 188 189 // test helper 190 static uint8_t disable_l2cap_timeouts = 0; 191 #endif 192 193 // reset connection state on create and on reconnect 194 // don't overwrite addr, con handle, role 195 static void hci_connection_init(hci_connection_t * conn){ 196 conn->authentication_flags = AUTH_FLAG_NONE; 197 conn->bonding_flags = 0; 198 conn->requested_security_level = LEVEL_0; 199 #ifdef ENABLE_CLASSIC 200 conn->request_role = HCI_ROLE_INVALID; 201 conn->sniff_subrating_max_latency = 0xffff; 202 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 203 conn->link_key_type = INVALID_LINK_KEY; 204 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 205 btstack_run_loop_set_timer_context(&conn->timeout, conn); 206 hci_connection_timestamp(conn); 207 #endif 208 conn->acl_recombination_length = 0; 209 conn->acl_recombination_pos = 0; 210 conn->num_packets_sent = 0; 211 212 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 213 #ifdef ENABLE_BLE 214 conn->le_phy_update_all_phys = 0xff; 215 #endif 216 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 217 conn->le_max_tx_octets = 27; 218 #endif 219 #ifdef ENABLE_CLASSIC_PAIRING_OOB 220 conn->classic_oob_c_192 = NULL; 221 conn->classic_oob_r_192 = NULL; 222 conn->classic_oob_c_256 = NULL; 223 conn->classic_oob_r_256 = NULL; 224 #endif 225 } 226 227 /** 228 * create connection for given address 229 * 230 * @return connection OR NULL, if no memory left 231 */ 232 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 233 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 234 235 hci_connection_t * conn = btstack_memory_hci_connection_get(); 236 if (!conn) return NULL; 237 hci_connection_init(conn); 238 239 bd_addr_copy(conn->address, addr); 240 conn->address_type = addr_type; 241 conn->con_handle = HCI_CON_HANDLE_INVALID; 242 conn->role = HCI_ROLE_INVALID; 243 244 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 245 246 return conn; 247 } 248 249 250 /** 251 * get le connection parameter range 252 * 253 * @return le connection parameter range struct 254 */ 255 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 256 *range = hci_stack->le_connection_parameter_range; 257 } 258 259 /** 260 * set le connection parameter range 261 * 262 */ 263 264 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 265 hci_stack->le_connection_parameter_range = *range; 266 } 267 268 /** 269 * @brief Test if connection parameters are inside in existing rage 270 * @param conn_interval_min (unit: 1.25ms) 271 * @param conn_interval_max (unit: 1.25ms) 272 * @param conn_latency 273 * @param supervision_timeout (unit: 10ms) 274 * @returns 1 if included 275 */ 276 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 277 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 278 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 279 280 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 281 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 282 283 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 284 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 285 286 return 1; 287 } 288 289 /** 290 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 291 * @note: default: 1 292 * @param max_peripheral_connections 293 */ 294 #ifdef ENABLE_LE_PERIPHERAL 295 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 296 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 297 } 298 #endif 299 300 /** 301 * get hci connections iterator 302 * 303 * @return hci connections iterator 304 */ 305 306 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 307 btstack_linked_list_iterator_init(it, &hci_stack->connections); 308 } 309 310 /** 311 * get connection for a given handle 312 * 313 * @return connection OR NULL, if not found 314 */ 315 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 316 btstack_linked_list_iterator_t it; 317 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 318 while (btstack_linked_list_iterator_has_next(&it)){ 319 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 320 if ( item->con_handle == con_handle ) { 321 return item; 322 } 323 } 324 return NULL; 325 } 326 327 /** 328 * get connection for given address 329 * 330 * @return connection OR NULL, if not found 331 */ 332 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 337 if (connection->address_type != addr_type) continue; 338 if (memcmp(addr, connection->address, 6) != 0) continue; 339 return connection; 340 } 341 return NULL; 342 } 343 344 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 345 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 346 } 347 348 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 350 } 351 352 #ifdef ENABLE_CLASSIC 353 354 #ifdef ENABLE_SCO_OVER_HCI 355 static int hci_number_sco_connections(void){ 356 int connections = 0; 357 btstack_linked_list_iterator_t it; 358 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 359 while (btstack_linked_list_iterator_has_next(&it)){ 360 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 361 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 362 connections++; 363 } 364 return connections; 365 } 366 #endif 367 368 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 369 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 370 #ifdef HAVE_EMBEDDED_TICK 371 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 372 // connections might be timed out 373 hci_emit_l2cap_check_timeout(connection); 374 } 375 #else 376 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 377 // connections might be timed out 378 hci_emit_l2cap_check_timeout(connection); 379 } 380 #endif 381 } 382 383 static void hci_connection_timestamp(hci_connection_t *connection){ 384 #ifdef HAVE_EMBEDDED_TICK 385 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 386 #else 387 connection->timestamp = btstack_run_loop_get_time_ms(); 388 #endif 389 } 390 391 /** 392 * add authentication flags and reset timer 393 * @note: assumes classic connection 394 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 395 */ 396 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 397 bd_addr_t addr; 398 reverse_bd_addr(bd_addr, addr); 399 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 400 if (conn) { 401 connectionSetAuthenticationFlags(conn, flags); 402 hci_connection_timestamp(conn); 403 } 404 } 405 406 static bool hci_pairing_active(hci_connection_t * hci_connection){ 407 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 408 } 409 410 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 411 if (hci_pairing_active(hci_connection)) return; 412 if (ssp){ 413 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 414 } else { 415 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 416 } 417 // if we are initiator, we have sent an HCI Authenticate Request 418 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 419 420 // if we are responder, use minimal service security level as required level 421 if (!initiator){ 422 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 423 } 424 425 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 426 427 uint8_t event[12]; 428 event[0] = GAP_EVENT_PAIRING_STARTED; 429 event[1] = 10; 430 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 431 reverse_bd_addr(hci_connection->address, &event[4]); 432 event[10] = (uint8_t) ssp; 433 event[11] = (uint8_t) initiator; 434 hci_emit_event(event, sizeof(event), 1); 435 } 436 437 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 438 hci_connection->requested_security_level = LEVEL_0; 439 if (!hci_pairing_active(hci_connection)) return; 440 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 441 #ifdef ENABLE_CLASSIC_PAIRING_OOB 442 hci_connection->classic_oob_c_192 = NULL; 443 hci_connection->classic_oob_r_192 = NULL; 444 hci_connection->classic_oob_c_256 = NULL; 445 hci_connection->classic_oob_r_256 = NULL; 446 #endif 447 log_info("pairing complete, status %02x", status); 448 449 uint8_t event[12]; 450 event[0] = GAP_EVENT_PAIRING_COMPLETE; 451 event[1] = 9; 452 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 453 reverse_bd_addr(hci_connection->address, &event[4]); 454 event[10] = status; 455 hci_emit_event(event, sizeof(event), 1); 456 } 457 458 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 459 hci_connection_t * conn = hci_connection_for_handle(handle); 460 if (!conn) return false; 461 return hci_pairing_active(conn); 462 } 463 464 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 465 if (!hci_stack->link_key_db) return; 466 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 467 hci_stack->link_key_db->delete_link_key(addr); 468 } 469 470 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 471 if (!hci_stack->link_key_db) return; 472 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 473 hci_stack->link_key_db->put_link_key(addr, link_key, type); 474 } 475 476 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 477 if (!hci_stack->link_key_db) return false; 478 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 479 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 480 return result; 481 } 482 483 void gap_delete_all_link_keys(void){ 484 bd_addr_t addr; 485 link_key_t link_key; 486 link_key_type_t type; 487 btstack_link_key_iterator_t it; 488 int ok = gap_link_key_iterator_init(&it); 489 if (!ok) { 490 log_error("could not initialize iterator"); 491 return; 492 } 493 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 494 gap_drop_link_key_for_bd_addr(addr); 495 } 496 gap_link_key_iterator_done(&it); 497 } 498 499 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 500 if (!hci_stack->link_key_db) return 0; 501 if (!hci_stack->link_key_db->iterator_init) return 0; 502 return hci_stack->link_key_db->iterator_init(it); 503 } 504 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 505 if (!hci_stack->link_key_db) return 0; 506 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 507 } 508 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 509 if (!hci_stack->link_key_db) return; 510 hci_stack->link_key_db->iterator_done(it); 511 } 512 #endif 513 514 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 515 switch (address_type){ 516 case BD_ADDR_TYPE_LE_PUBLIC: 517 case BD_ADDR_TYPE_LE_RANDOM: 518 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 519 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 520 return true; 521 default: 522 return false; 523 } 524 } 525 526 static int hci_is_le_connection(hci_connection_t * connection){ 527 return hci_is_le_connection_type(connection->address_type); 528 } 529 530 /** 531 * count connections 532 */ 533 static int nr_hci_connections(void){ 534 int count = 0; 535 btstack_linked_item_t *it; 536 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 537 count++; 538 } 539 return count; 540 } 541 542 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 543 544 unsigned int num_packets_sent_classic = 0; 545 unsigned int num_packets_sent_le = 0; 546 547 btstack_linked_item_t *it; 548 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 549 hci_connection_t * connection = (hci_connection_t *) it; 550 if (hci_is_le_connection(connection)){ 551 num_packets_sent_le += connection->num_packets_sent; 552 } 553 if (connection->address_type == BD_ADDR_TYPE_ACL){ 554 num_packets_sent_classic += connection->num_packets_sent; 555 } 556 } 557 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 558 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 559 int free_slots_le = 0; 560 561 if (free_slots_classic < 0){ 562 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 563 return 0; 564 } 565 566 if (hci_stack->le_acl_packets_total_num){ 567 // if we have LE slots, they are used 568 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 569 if (free_slots_le < 0){ 570 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 571 return 0; 572 } 573 } else { 574 // otherwise, classic slots are used for LE, too 575 free_slots_classic -= num_packets_sent_le; 576 if (free_slots_classic < 0){ 577 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 578 return 0; 579 } 580 } 581 582 switch (address_type){ 583 case BD_ADDR_TYPE_UNKNOWN: 584 log_error("hci_number_free_acl_slots: unknown address type"); 585 return 0; 586 587 case BD_ADDR_TYPE_ACL: 588 return free_slots_classic; 589 590 default: 591 if (hci_stack->le_acl_packets_total_num){ 592 return free_slots_le; 593 } 594 return free_slots_classic; 595 } 596 } 597 598 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 599 // get connection type 600 hci_connection_t * connection = hci_connection_for_handle(con_handle); 601 if (!connection){ 602 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 603 return 0; 604 } 605 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 606 } 607 608 #ifdef ENABLE_CLASSIC 609 static int hci_number_free_sco_slots(void){ 610 unsigned int num_sco_packets_sent = 0; 611 btstack_linked_item_t *it; 612 if (hci_stack->synchronous_flow_control_enabled){ 613 // explicit flow control 614 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 615 hci_connection_t * connection = (hci_connection_t *) it; 616 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 617 num_sco_packets_sent += connection->num_packets_sent; 618 } 619 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 620 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 621 return 0; 622 } 623 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 624 } else { 625 // implicit flow control -- TODO 626 int num_ready = 0; 627 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 628 hci_connection_t * connection = (hci_connection_t *) it; 629 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 630 if (connection->sco_tx_ready == 0) continue; 631 num_ready++; 632 } 633 return num_ready; 634 } 635 } 636 #endif 637 638 // only used to send HCI Host Number Completed Packets 639 static int hci_can_send_comand_packet_transport(void){ 640 if (hci_stack->hci_packet_buffer_reserved) return 0; 641 642 // check for async hci transport implementations 643 if (hci_stack->hci_transport->can_send_packet_now){ 644 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 645 return 0; 646 } 647 } 648 return 1; 649 } 650 651 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 652 bool hci_can_send_command_packet_now(void){ 653 if (hci_can_send_comand_packet_transport() == 0) return false; 654 return hci_stack->num_cmd_packets > 0u; 655 } 656 657 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 658 // check for async hci transport implementations 659 if (!hci_stack->hci_transport->can_send_packet_now) return true; 660 return hci_stack->hci_transport->can_send_packet_now(packet_type); 661 } 662 663 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 664 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 665 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 666 } 667 668 bool hci_can_send_acl_le_packet_now(void){ 669 if (hci_stack->hci_packet_buffer_reserved) return false; 670 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 671 } 672 673 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 674 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 675 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 676 } 677 678 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 679 if (hci_stack->hci_packet_buffer_reserved) return false; 680 return hci_can_send_prepared_acl_packet_now(con_handle); 681 } 682 683 #ifdef ENABLE_CLASSIC 684 bool hci_can_send_acl_classic_packet_now(void){ 685 if (hci_stack->hci_packet_buffer_reserved) return false; 686 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 687 } 688 689 bool hci_can_send_prepared_sco_packet_now(void){ 690 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 691 if (hci_have_usb_transport()){ 692 return hci_stack->sco_can_send_now; 693 } else { 694 return hci_number_free_sco_slots() > 0; 695 } 696 } 697 698 bool hci_can_send_sco_packet_now(void){ 699 if (hci_stack->hci_packet_buffer_reserved) return false; 700 return hci_can_send_prepared_sco_packet_now(); 701 } 702 703 void hci_request_sco_can_send_now_event(void){ 704 hci_stack->sco_waiting_for_can_send_now = 1; 705 hci_notify_if_sco_can_send_now(); 706 } 707 #endif 708 709 // used for internal checks in l2cap.c 710 bool hci_is_packet_buffer_reserved(void){ 711 return hci_stack->hci_packet_buffer_reserved; 712 } 713 714 // reserves outgoing packet buffer. @returns 1 if successful 715 bool hci_reserve_packet_buffer(void){ 716 if (hci_stack->hci_packet_buffer_reserved) { 717 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 718 return false; 719 } 720 hci_stack->hci_packet_buffer_reserved = true; 721 return true; 722 } 723 724 void hci_release_packet_buffer(void){ 725 hci_stack->hci_packet_buffer_reserved = false; 726 } 727 728 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 729 static int hci_transport_synchronous(void){ 730 return hci_stack->hci_transport->can_send_packet_now == NULL; 731 } 732 733 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 734 735 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 736 737 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 738 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 739 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 740 max_acl_data_packet_length = hci_stack->le_data_packets_length; 741 } 742 743 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 744 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 745 max_acl_data_packet_length = connection->le_max_tx_octets; 746 } 747 #endif 748 749 log_debug("hci_send_acl_packet_fragments entered"); 750 751 uint8_t status = ERROR_CODE_SUCCESS; 752 // multiple packets could be send on a synchronous HCI transport 753 while (true){ 754 755 log_debug("hci_send_acl_packet_fragments loop entered"); 756 757 // get current data 758 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 759 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 760 bool more_fragments = false; 761 762 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 763 if (current_acl_data_packet_length > max_acl_data_packet_length){ 764 more_fragments = true; 765 current_acl_data_packet_length = max_acl_data_packet_length; 766 } 767 768 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 769 if (acl_header_pos > 0u){ 770 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 771 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 772 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 773 } 774 775 // update header len 776 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 777 778 // count packet 779 connection->num_packets_sent++; 780 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 781 782 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 783 if (more_fragments){ 784 // update start of next fragment to send 785 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 786 } else { 787 // done 788 hci_stack->acl_fragmentation_pos = 0; 789 hci_stack->acl_fragmentation_total_size = 0; 790 } 791 792 // send packet 793 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 794 const int size = current_acl_data_packet_length + 4; 795 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 796 hci_stack->acl_fragmentation_tx_active = 1; 797 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 798 if (err != 0){ 799 // no error from HCI Transport expected 800 status = ERROR_CODE_HARDWARE_FAILURE; 801 } 802 803 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 804 805 // done yet? 806 if (!more_fragments) break; 807 808 // can send more? 809 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 810 } 811 812 log_debug("hci_send_acl_packet_fragments loop over"); 813 814 // release buffer now for synchronous transport 815 if (hci_transport_synchronous()){ 816 hci_stack->acl_fragmentation_tx_active = 0; 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 } 820 821 return status; 822 } 823 824 // pre: caller has reserved the packet buffer 825 uint8_t hci_send_acl_packet_buffer(int size){ 826 btstack_assert(hci_stack->hci_packet_buffer_reserved); 827 828 uint8_t * packet = hci_stack->hci_packet_buffer; 829 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 830 831 // check for free places on Bluetooth module 832 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 833 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 834 hci_release_packet_buffer(); 835 hci_emit_transport_packet_sent(); 836 return BTSTACK_ACL_BUFFERS_FULL; 837 } 838 839 hci_connection_t *connection = hci_connection_for_handle( con_handle); 840 if (!connection) { 841 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 842 hci_release_packet_buffer(); 843 hci_emit_transport_packet_sent(); 844 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 845 } 846 847 #ifdef ENABLE_CLASSIC 848 hci_connection_timestamp(connection); 849 #endif 850 851 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 852 853 // setup data 854 hci_stack->acl_fragmentation_total_size = size; 855 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 856 857 return hci_send_acl_packet_fragments(connection); 858 } 859 860 #ifdef ENABLE_CLASSIC 861 // pre: caller has reserved the packet buffer 862 uint8_t hci_send_sco_packet_buffer(int size){ 863 btstack_assert(hci_stack->hci_packet_buffer_reserved); 864 865 uint8_t * packet = hci_stack->hci_packet_buffer; 866 867 // skip checks in loopback mode 868 if (!hci_stack->loopback_mode){ 869 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 870 871 // check for free places on Bluetooth module 872 if (!hci_can_send_prepared_sco_packet_now()) { 873 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 874 hci_release_packet_buffer(); 875 hci_emit_transport_packet_sent(); 876 return BTSTACK_ACL_BUFFERS_FULL; 877 } 878 879 // track send packet in connection struct 880 hci_connection_t *connection = hci_connection_for_handle( con_handle); 881 if (!connection) { 882 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 883 hci_release_packet_buffer(); 884 hci_emit_transport_packet_sent(); 885 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 886 } 887 888 if (hci_have_usb_transport()){ 889 // token used 890 hci_stack->sco_can_send_now = false; 891 } else { 892 if (hci_stack->synchronous_flow_control_enabled){ 893 connection->num_packets_sent++; 894 } else { 895 connection->sco_tx_ready--; 896 } 897 } 898 } 899 900 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 901 902 #ifdef HAVE_SCO_TRANSPORT 903 hci_stack->sco_transport->send_packet(packet, size); 904 hci_release_packet_buffer(); 905 hci_emit_transport_packet_sent(); 906 907 return 0; 908 #else 909 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 910 if (hci_transport_synchronous()){ 911 hci_release_packet_buffer(); 912 hci_emit_transport_packet_sent(); 913 } 914 915 if (err != 0){ 916 return ERROR_CODE_HARDWARE_FAILURE; 917 } 918 return ERROR_CODE_SUCCESS; 919 #endif 920 } 921 #endif 922 923 static void acl_handler(uint8_t *packet, uint16_t size){ 924 925 // get info 926 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 927 hci_connection_t *conn = hci_connection_for_handle(con_handle); 928 uint8_t acl_flags = READ_ACL_FLAGS(packet); 929 uint16_t acl_length = READ_ACL_LENGTH(packet); 930 931 // ignore non-registered handle 932 if (!conn){ 933 log_error("acl_handler called with non-registered handle %u!" , con_handle); 934 return; 935 } 936 937 // assert packet is complete 938 if ((acl_length + 4u) != size){ 939 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 940 return; 941 } 942 943 #ifdef ENABLE_CLASSIC 944 // update idle timestamp 945 hci_connection_timestamp(conn); 946 #endif 947 948 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 949 hci_stack->host_completed_packets = 1; 950 conn->num_packets_completed++; 951 #endif 952 953 // handle different packet types 954 switch (acl_flags & 0x03u) { 955 956 case 0x01: // continuation fragment 957 958 // sanity checks 959 if (conn->acl_recombination_pos == 0u) { 960 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 961 return; 962 } 963 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 964 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 965 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 966 conn->acl_recombination_pos = 0; 967 return; 968 } 969 970 // append fragment payload (header already stored) 971 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 972 &packet[4], acl_length); 973 conn->acl_recombination_pos += acl_length; 974 975 // forward complete L2CAP packet if complete. 976 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 977 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 978 // reset recombination buffer 979 conn->acl_recombination_length = 0; 980 conn->acl_recombination_pos = 0; 981 } 982 break; 983 984 case 0x02: { // first fragment 985 986 // sanity check 987 if (conn->acl_recombination_pos) { 988 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 989 conn->acl_recombination_pos = 0; 990 } 991 992 // peek into L2CAP packet! 993 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 994 995 // compare fragment size to L2CAP packet size 996 if (acl_length >= (l2cap_length + 4u)){ 997 // forward fragment as L2CAP packet 998 hci_emit_acl_packet(packet, acl_length + 4u); 999 } else { 1000 1001 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1002 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1003 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1004 return; 1005 } 1006 1007 // store first fragment and tweak acl length for complete package 1008 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1009 packet, acl_length + 4u); 1010 conn->acl_recombination_pos = acl_length + 4u; 1011 conn->acl_recombination_length = l2cap_length; 1012 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1013 } 1014 break; 1015 1016 } 1017 default: 1018 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1019 return; 1020 } 1021 1022 // execute main loop 1023 hci_run(); 1024 } 1025 1026 static void hci_connection_stop_timer(hci_connection_t * conn){ 1027 btstack_run_loop_remove_timer(&conn->timeout); 1028 #ifdef ENABLE_CLASSIC 1029 btstack_run_loop_remove_timer(&conn->timeout_sco); 1030 #endif 1031 } 1032 1033 static void hci_shutdown_connection(hci_connection_t *conn){ 1034 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1035 1036 #ifdef ENABLE_CLASSIC 1037 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1038 bd_addr_type_t addr_type = conn->address_type; 1039 #endif 1040 #ifdef HAVE_SCO_TRANSPORT 1041 hci_con_handle_t con_handle = conn->con_handle; 1042 #endif 1043 #endif 1044 1045 hci_connection_stop_timer(conn); 1046 1047 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1048 btstack_memory_hci_connection_free( conn ); 1049 1050 // now it's gone 1051 hci_emit_nr_connections_changed(); 1052 1053 #ifdef ENABLE_CLASSIC 1054 #ifdef ENABLE_SCO_OVER_HCI 1055 // update SCO 1056 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1057 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1058 } 1059 #endif 1060 #ifdef HAVE_SCO_TRANSPORT 1061 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1062 hci_stack->sco_transport->close(con_handle); 1063 } 1064 #endif 1065 #endif 1066 } 1067 1068 #ifdef ENABLE_CLASSIC 1069 1070 static const uint16_t packet_type_sizes[] = { 1071 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1072 HCI_ACL_DH1_SIZE, 0, 0, 0, 1073 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1074 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1075 }; 1076 static const uint8_t packet_type_feature_requirement_bit[] = { 1077 0, // 3 slot packets 1078 1, // 5 slot packets 1079 25, // EDR 2 mpbs 1080 26, // EDR 3 mbps 1081 39, // 3 slot EDR packts 1082 40, // 5 slot EDR packet 1083 }; 1084 static const uint16_t packet_type_feature_packet_mask[] = { 1085 0x0f00, // 3 slot packets 1086 0xf000, // 5 slot packets 1087 0x1102, // EDR 2 mpbs 1088 0x2204, // EDR 3 mbps 1089 0x0300, // 3 slot EDR packts 1090 0x3000, // 5 slot EDR packet 1091 }; 1092 1093 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1094 // enable packet types based on size 1095 uint16_t packet_types = 0; 1096 unsigned int i; 1097 for (i=0;i<16;i++){ 1098 if (packet_type_sizes[i] == 0) continue; 1099 if (packet_type_sizes[i] <= buffer_size){ 1100 packet_types |= 1 << i; 1101 } 1102 } 1103 // disable packet types due to missing local supported features 1104 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1105 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1106 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1107 if (feature_set) continue; 1108 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1109 packet_types &= ~packet_type_feature_packet_mask[i]; 1110 } 1111 // flip bits for "may not be used" 1112 packet_types ^= 0x3306; 1113 return packet_types; 1114 } 1115 1116 uint16_t hci_usable_acl_packet_types(void){ 1117 return hci_stack->packet_types; 1118 } 1119 #endif 1120 1121 uint8_t* hci_get_outgoing_packet_buffer(void){ 1122 // hci packet buffer is >= acl data packet length 1123 return hci_stack->hci_packet_buffer; 1124 } 1125 1126 uint16_t hci_max_acl_data_packet_length(void){ 1127 return hci_stack->acl_data_packet_length; 1128 } 1129 1130 #ifdef ENABLE_CLASSIC 1131 bool hci_extended_sco_link_supported(void){ 1132 // No. 31, byte 3, bit 7 1133 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1134 } 1135 #endif 1136 1137 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1138 // No. 54, byte 6, bit 6 1139 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1140 } 1141 1142 static int gap_ssp_supported(void){ 1143 // No. 51, byte 6, bit 3 1144 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1145 } 1146 1147 static int hci_classic_supported(void){ 1148 #ifdef ENABLE_CLASSIC 1149 // No. 37, byte 4, bit 5, = No BR/EDR Support 1150 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1151 #else 1152 return 0; 1153 #endif 1154 } 1155 1156 static int hci_le_supported(void){ 1157 #ifdef ENABLE_BLE 1158 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1159 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1160 #else 1161 return 0; 1162 #endif 1163 } 1164 1165 #ifdef ENABLE_BLE 1166 1167 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1168 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1169 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1170 } else { 1171 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1172 } 1173 } 1174 1175 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1176 *addr_type = hci_stack->le_own_addr_type; 1177 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1178 } 1179 1180 #ifdef ENABLE_LE_PERIPHERAL 1181 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1182 *addr_type = hci_stack->le_advertisements_own_addr_type; 1183 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1184 }; 1185 #endif 1186 1187 #ifdef ENABLE_LE_CENTRAL 1188 1189 /** 1190 * @brief Get own addr type and address used for LE connections (Central) 1191 */ 1192 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1193 *addr_type = hci_stack->le_connection_own_addr_type; 1194 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1195 } 1196 1197 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1198 1199 int offset = 3; 1200 int num_reports = packet[offset]; 1201 offset += 1; 1202 1203 int i; 1204 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1205 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1206 for (i=0; (i<num_reports) && (offset < size);i++){ 1207 // sanity checks on data_length: 1208 uint8_t data_length = packet[offset + 8]; 1209 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1210 if ((offset + 9u + data_length + 1u) > size) return; 1211 // setup event 1212 uint8_t event_size = 10u + data_length; 1213 int pos = 0; 1214 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1215 event[pos++] = event_size; 1216 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1217 offset += 8; 1218 pos += 8; 1219 event[pos++] = packet[offset + 1 + data_length]; // rssi 1220 event[pos++] = data_length; 1221 offset++; 1222 (void)memcpy(&event[pos], &packet[offset], data_length); 1223 pos += data_length; 1224 offset += data_length + 1u; // rssi 1225 hci_emit_event(event, pos, 1); 1226 } 1227 } 1228 #endif 1229 #endif 1230 1231 #ifdef ENABLE_BLE 1232 #ifdef ENABLE_LE_PERIPHERAL 1233 static void hci_update_advertisements_enabled_for_current_roles(void){ 1234 if (hci_stack->le_advertisements_enabled){ 1235 // get number of active le slave connections 1236 int num_slave_connections = 0; 1237 btstack_linked_list_iterator_t it; 1238 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1239 while (btstack_linked_list_iterator_has_next(&it)){ 1240 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1241 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1242 if (con->state != OPEN) continue; 1243 if (con->role != HCI_ROLE_SLAVE) continue; 1244 if (!hci_is_le_connection(con)) continue; 1245 num_slave_connections++; 1246 } 1247 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1248 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1249 } else { 1250 hci_stack->le_advertisements_enabled_for_current_roles = false; 1251 } 1252 } 1253 #endif 1254 #endif 1255 1256 #ifdef ENABLE_CLASSIC 1257 static void gap_run_set_local_name(void){ 1258 hci_reserve_packet_buffer(); 1259 uint8_t * packet = hci_stack->hci_packet_buffer; 1260 // construct HCI Command and send 1261 uint16_t opcode = hci_write_local_name.opcode; 1262 hci_stack->last_cmd_opcode = opcode; 1263 packet[0] = opcode & 0xff; 1264 packet[1] = opcode >> 8; 1265 packet[2] = DEVICE_NAME_LEN; 1266 memset(&packet[3], 0, DEVICE_NAME_LEN); 1267 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1268 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1269 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1270 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1271 // expand '00:00:00:00:00:00' in name with bd_addr 1272 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1273 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1274 } 1275 1276 static void gap_run_set_eir_data(void){ 1277 hci_reserve_packet_buffer(); 1278 uint8_t * packet = hci_stack->hci_packet_buffer; 1279 // construct HCI Command in-place and send 1280 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1281 hci_stack->last_cmd_opcode = opcode; 1282 uint16_t offset = 0; 1283 packet[offset++] = opcode & 0xff; 1284 packet[offset++] = opcode >> 8; 1285 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1286 packet[offset++] = 0; // FEC not required 1287 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1288 if (hci_stack->eir_data){ 1289 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1290 ad_context_t context; 1291 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1292 uint8_t data_type = ad_iterator_get_data_type(&context); 1293 uint8_t size = ad_iterator_get_data_len(&context); 1294 const uint8_t *data = ad_iterator_get_data(&context); 1295 // copy item 1296 packet[offset++] = size + 1; 1297 packet[offset++] = data_type; 1298 memcpy(&packet[offset], data, size); 1299 // update name item 1300 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1301 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1302 } 1303 offset += size; 1304 } 1305 } else { 1306 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1307 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1308 packet[offset++] = bytes_to_copy + 1; 1309 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1310 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1311 // expand '00:00:00:00:00:00' in name with bd_addr 1312 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1313 } 1314 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1315 } 1316 1317 static void hci_run_gap_tasks_classic(void){ 1318 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1319 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1320 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1321 return; 1322 } 1323 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1324 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1325 gap_run_set_local_name(); 1326 return; 1327 } 1328 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1329 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1330 gap_run_set_eir_data(); 1331 return; 1332 } 1333 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1334 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1335 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1336 return; 1337 } 1338 // write page scan activity 1339 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1340 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1341 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1342 return; 1343 } 1344 // write page scan type 1345 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1346 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1347 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1348 return; 1349 } 1350 // send scan enable 1351 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1352 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1353 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1354 return; 1355 } 1356 } 1357 #endif 1358 1359 #ifndef HAVE_HOST_CONTROLLER_API 1360 1361 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1362 if (!hci_stack->config) return 0; 1363 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1364 // Limit baud rate for Broadcom chipsets to 3 mbps 1365 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1366 baud_rate = 3000000; 1367 } 1368 return baud_rate; 1369 } 1370 1371 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1372 UNUSED(ds); 1373 1374 switch (hci_stack->substate){ 1375 case HCI_INIT_W4_SEND_RESET: 1376 log_info("Resend HCI Reset"); 1377 hci_stack->substate = HCI_INIT_SEND_RESET; 1378 hci_stack->num_cmd_packets = 1; 1379 hci_run(); 1380 break; 1381 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1382 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1383 if (hci_stack->hci_transport->reset_link){ 1384 hci_stack->hci_transport->reset_link(); 1385 } 1386 1387 /* fall through */ 1388 1389 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1390 log_info("Resend HCI Reset - CSR Warm Boot"); 1391 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1392 hci_stack->num_cmd_packets = 1; 1393 hci_run(); 1394 break; 1395 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1396 if (hci_stack->hci_transport->set_baudrate){ 1397 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1398 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1399 hci_stack->hci_transport->set_baudrate(baud_rate); 1400 } 1401 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1402 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1403 if (hci_stack->hci_transport->reset_link){ 1404 log_info("Link Reset"); 1405 hci_stack->hci_transport->reset_link(); 1406 } 1407 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1408 hci_run(); 1409 } 1410 break; 1411 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1412 // otherwise continue 1413 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1414 hci_send_cmd(&hci_read_local_supported_commands); 1415 break; 1416 default: 1417 break; 1418 } 1419 } 1420 #endif 1421 1422 static void hci_initializing_next_state(void){ 1423 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1424 } 1425 1426 // assumption: hci_can_send_command_packet_now() == true 1427 static void hci_initializing_run(void){ 1428 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1429 1430 bool need_baud_change = false; 1431 1432 #ifndef HAVE_HOST_CONTROLLER_API 1433 need_baud_change = hci_stack->config 1434 && hci_stack->chipset 1435 && hci_stack->chipset->set_baudrate_command 1436 && hci_stack->hci_transport->set_baudrate 1437 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1438 #endif 1439 1440 switch (hci_stack->substate){ 1441 case HCI_INIT_SEND_RESET: 1442 hci_state_reset(); 1443 1444 #ifndef HAVE_HOST_CONTROLLER_API 1445 // prepare reset if command complete not received in 100ms 1446 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1447 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1448 btstack_run_loop_add_timer(&hci_stack->timeout); 1449 #endif 1450 // send command 1451 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1452 hci_send_cmd(&hci_reset); 1453 break; 1454 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1455 hci_send_cmd(&hci_read_local_version_information); 1456 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1457 break; 1458 case HCI_INIT_SEND_READ_LOCAL_NAME: 1459 hci_send_cmd(&hci_read_local_name); 1460 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1461 break; 1462 1463 #ifndef HAVE_HOST_CONTROLLER_API 1464 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1465 hci_state_reset(); 1466 // prepare reset if command complete not received in 100ms 1467 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1468 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1469 btstack_run_loop_add_timer(&hci_stack->timeout); 1470 // send command 1471 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1472 hci_send_cmd(&hci_reset); 1473 break; 1474 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1475 hci_state_reset(); 1476 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1477 hci_send_cmd(&hci_reset); 1478 break; 1479 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1480 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1481 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1482 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1483 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1484 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1485 break; 1486 } 1487 case HCI_INIT_SET_BD_ADDR: 1488 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1489 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1490 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1491 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1492 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1493 break; 1494 case HCI_INIT_SEND_BAUD_CHANGE: 1495 if (need_baud_change) { 1496 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1497 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1498 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1499 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1500 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1501 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1502 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1503 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1504 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1505 btstack_run_loop_add_timer(&hci_stack->timeout); 1506 } 1507 break; 1508 } 1509 1510 /* fall through */ 1511 1512 case HCI_INIT_CUSTOM_INIT: 1513 // Custom initialization 1514 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1515 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1516 bool send_cmd = false; 1517 switch (hci_stack->chipset_result){ 1518 case BTSTACK_CHIPSET_VALID_COMMAND: 1519 send_cmd = true; 1520 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1521 break; 1522 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1523 send_cmd = true; 1524 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1525 log_info("CSR Warm Boot"); 1526 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1527 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1528 btstack_run_loop_add_timer(&hci_stack->timeout); 1529 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1530 && hci_stack->config 1531 && hci_stack->chipset 1532 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1533 && hci_stack->hci_transport->set_baudrate 1534 && hci_transport_uart_get_main_baud_rate()){ 1535 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1536 } else { 1537 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1538 } 1539 break; 1540 default: 1541 break; 1542 } 1543 1544 if (send_cmd){ 1545 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1546 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1547 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1548 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1549 break; 1550 } 1551 log_info("Init script done"); 1552 1553 // Init script download on Broadcom chipsets causes: 1554 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1555 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1556 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1557 1558 // - baud rate to reset, restore UART baud rate if needed 1559 if (need_baud_change) { 1560 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1561 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1562 hci_stack->hci_transport->set_baudrate(baud_rate); 1563 } 1564 1565 uint16_t bcm_delay_ms = 300; 1566 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1567 // -> Work around: wait here. 1568 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1569 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1570 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1571 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1572 btstack_run_loop_add_timer(&hci_stack->timeout); 1573 break; 1574 } 1575 } 1576 /* fall through */ 1577 #endif 1578 1579 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1580 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1581 hci_send_cmd(&hci_read_local_supported_commands); 1582 break; 1583 case HCI_INIT_READ_BD_ADDR: 1584 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1585 hci_send_cmd(&hci_read_bd_addr); 1586 break; 1587 case HCI_INIT_READ_BUFFER_SIZE: 1588 // only read buffer size if supported 1589 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1590 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1591 hci_send_cmd(&hci_read_buffer_size); 1592 break; 1593 } 1594 /* fall through */ 1595 1596 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1597 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1598 hci_send_cmd(&hci_read_local_supported_features); 1599 break; 1600 1601 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1602 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1603 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1604 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1605 break; 1606 case HCI_INIT_HOST_BUFFER_SIZE: 1607 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1608 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1609 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1610 break; 1611 #endif 1612 1613 case HCI_INIT_SET_EVENT_MASK: 1614 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1615 if (hci_le_supported()){ 1616 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1617 } else { 1618 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1619 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1620 } 1621 break; 1622 1623 #ifdef ENABLE_CLASSIC 1624 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1625 if (gap_ssp_supported()){ 1626 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1627 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1628 break; 1629 } 1630 /* fall through */ 1631 1632 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1633 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1634 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1635 break; 1636 case HCI_INIT_WRITE_INQUIRY_MODE: 1637 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1638 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1639 break; 1640 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1641 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1642 hci_stack->secure_connections_active = true; 1643 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1644 break; 1645 // only sent if ENABLE_SCO_OVER_HCI is defined 1646 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1647 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1648 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1649 break; 1650 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1651 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1652 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1653 break; 1654 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1655 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1656 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1657 #ifdef ENABLE_SCO_OVER_HCI 1658 log_info("BCM: Route SCO data via HCI transport"); 1659 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1660 #endif 1661 #ifdef ENABLE_SCO_OVER_PCM 1662 log_info("BCM: Route SCO data via PCM interface"); 1663 #ifdef ENABLE_BCM_PCM_WBS 1664 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1665 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1666 #else 1667 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1668 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1669 #endif 1670 #endif 1671 break; 1672 #ifdef ENABLE_SCO_OVER_PCM 1673 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1674 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1675 log_info("BCM: Config PCM interface for I2S"); 1676 #ifdef ENABLE_BCM_PCM_WBS 1677 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1678 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1679 #else 1680 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1681 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1682 #endif 1683 break; 1684 #endif 1685 #endif 1686 1687 #ifdef ENABLE_BLE 1688 // LE INIT 1689 case HCI_INIT_LE_READ_BUFFER_SIZE: 1690 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1691 hci_send_cmd(&hci_le_read_buffer_size); 1692 break; 1693 case HCI_INIT_LE_SET_EVENT_MASK: 1694 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1695 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1696 break; 1697 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1698 // LE Supported Host = 1, Simultaneous Host = 0 1699 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1700 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1701 break; 1702 #endif 1703 1704 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1705 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1706 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1707 hci_send_cmd(&hci_le_read_maximum_data_length); 1708 break; 1709 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1710 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1711 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1712 break; 1713 #endif 1714 1715 #ifdef ENABLE_LE_CENTRAL 1716 case HCI_INIT_READ_WHITE_LIST_SIZE: 1717 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1718 hci_send_cmd(&hci_le_read_white_list_size); 1719 break; 1720 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1721 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1722 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); 1723 break; 1724 #endif 1725 default: 1726 return; 1727 } 1728 } 1729 1730 static void hci_init_done(void){ 1731 #ifdef ENABLE_CLASSIC 1732 // init sequence complete, check if GAP Tasks are completed 1733 if (hci_stack->gap_tasks != 0) { 1734 hci_run_gap_tasks_classic(); 1735 return; 1736 } 1737 #endif 1738 1739 // done. tell the app 1740 log_info("hci_init_done -> HCI_STATE_WORKING"); 1741 hci_stack->state = HCI_STATE_WORKING; 1742 hci_emit_state(); 1743 hci_run(); 1744 } 1745 1746 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1747 bool command_completed = false; 1748 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1749 uint16_t opcode = little_endian_read_16(packet,3); 1750 if (opcode == hci_stack->last_cmd_opcode){ 1751 command_completed = true; 1752 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1753 } else { 1754 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1755 } 1756 } 1757 1758 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1759 uint8_t status = packet[2]; 1760 uint16_t opcode = little_endian_read_16(packet,4); 1761 if (opcode == hci_stack->last_cmd_opcode){ 1762 if (status){ 1763 command_completed = true; 1764 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1765 } else { 1766 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1767 } 1768 } else { 1769 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1770 } 1771 } 1772 #ifndef HAVE_HOST_CONTROLLER_API 1773 // Vendor == CSR 1774 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1775 // TODO: track actual command 1776 command_completed = true; 1777 } 1778 1779 // Vendor == Toshiba 1780 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1781 // TODO: track actual command 1782 command_completed = true; 1783 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1784 hci_stack->num_cmd_packets = 1; 1785 } 1786 #endif 1787 1788 return command_completed; 1789 } 1790 1791 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1792 1793 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1794 1795 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1796 1797 #ifndef HAVE_HOST_CONTROLLER_API 1798 1799 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1800 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1801 // 1802 // HCI Reset 1803 // Timeout 100 ms 1804 // HCI Reset 1805 // Command Complete Reset 1806 // HCI Read Local Version Information 1807 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1808 // hang... 1809 // 1810 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1811 if (!command_completed 1812 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1813 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1814 1815 uint16_t opcode = little_endian_read_16(packet,3); 1816 if (opcode == hci_reset.opcode){ 1817 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1818 return; 1819 } 1820 } 1821 1822 // CSR & H5 1823 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1824 if (!command_completed 1825 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1826 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1827 1828 uint16_t opcode = little_endian_read_16(packet,3); 1829 if (opcode == hci_reset.opcode){ 1830 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1831 return; 1832 } 1833 } 1834 1835 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1836 // fix: Correct substate and behave as command below 1837 if (command_completed){ 1838 switch (hci_stack->substate){ 1839 case HCI_INIT_SEND_RESET: 1840 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1841 break; 1842 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1843 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1844 break; 1845 default: 1846 break; 1847 } 1848 } 1849 1850 #endif 1851 1852 if (!command_completed) return; 1853 1854 bool need_baud_change = false; 1855 bool need_addr_change = false; 1856 1857 #ifndef HAVE_HOST_CONTROLLER_API 1858 need_baud_change = hci_stack->config 1859 && hci_stack->chipset 1860 && hci_stack->chipset->set_baudrate_command 1861 && hci_stack->hci_transport->set_baudrate 1862 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1863 1864 need_addr_change = hci_stack->custom_bd_addr_set 1865 && hci_stack->chipset 1866 && hci_stack->chipset->set_bd_addr_command; 1867 #endif 1868 1869 switch(hci_stack->substate){ 1870 1871 #ifndef HAVE_HOST_CONTROLLER_API 1872 case HCI_INIT_SEND_RESET: 1873 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1874 // fix: just correct substate and behave as command below 1875 1876 /* fall through */ 1877 #endif 1878 1879 case HCI_INIT_W4_SEND_RESET: 1880 btstack_run_loop_remove_timer(&hci_stack->timeout); 1881 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1882 return; 1883 1884 #ifndef HAVE_HOST_CONTROLLER_API 1885 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1886 // for STLC2500D, baud rate change already happened. 1887 // for others, baud rate gets changed now 1888 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1889 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1890 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1891 hci_stack->hci_transport->set_baudrate(baud_rate); 1892 } 1893 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1894 return; 1895 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1896 btstack_run_loop_remove_timer(&hci_stack->timeout); 1897 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1898 return; 1899 case HCI_INIT_W4_CUSTOM_INIT: 1900 // repeat custom init 1901 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1902 return; 1903 #endif 1904 1905 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1906 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1907 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1908 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1909 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1910 return; 1911 } 1912 if (need_addr_change){ 1913 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1914 return; 1915 } 1916 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1917 return; 1918 #ifndef HAVE_HOST_CONTROLLER_API 1919 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1920 if (need_baud_change){ 1921 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1922 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1923 hci_stack->hci_transport->set_baudrate(baud_rate); 1924 } 1925 if (need_addr_change){ 1926 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1927 return; 1928 } 1929 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1930 return; 1931 case HCI_INIT_W4_SET_BD_ADDR: 1932 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1933 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1934 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1935 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1936 return; 1937 } 1938 // skipping st warm boot 1939 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1940 return; 1941 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1942 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1943 return; 1944 #endif 1945 case HCI_INIT_W4_SET_EVENT_MASK: 1946 // skip Classic init commands for LE only chipsets 1947 if (!hci_classic_supported()){ 1948 #ifdef ENABLE_BLE 1949 if (hci_le_supported()){ 1950 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1951 return; 1952 } 1953 #endif 1954 log_error("Neither BR/EDR nor LE supported"); 1955 hci_init_done(); 1956 return; 1957 } 1958 hci_stack->substate = HCI_INIT_WRITE_SIMPLE_PAIRING_MODE; 1959 return; 1960 1961 #ifdef ENABLE_BLE 1962 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1963 // skip write le host if not supported (e.g. on LE only EM9301) 1964 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1965 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1966 return; 1967 1968 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1969 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1970 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1971 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1972 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1973 return; 1974 } 1975 // explicit fall through to reduce repetitions 1976 1977 #ifdef ENABLE_LE_CENTRAL 1978 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1979 #else 1980 hci_init_done(); 1981 #endif 1982 return; 1983 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1984 1985 #endif /* ENABLE_BLE */ 1986 1987 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1988 // skip write secure connections host support if not supported or disabled 1989 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1990 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1991 return; 1992 } 1993 break; 1994 1995 #ifdef ENABLE_SCO_OVER_HCI 1996 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 1997 // skip write synchronous flow control if not supported 1998 if (hci_stack->local_supported_commands[0] & 0x04) break; 1999 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 2000 2001 /* fall through */ 2002 2003 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2004 // skip write default erroneous data reporting if not supported 2005 if (hci_stack->local_supported_commands[0] & 0x08) break; 2006 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 2007 2008 /* fall through */ 2009 2010 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 2011 // skip bcm set sco pcm config on non-Broadcom chipsets 2012 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 2013 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2014 2015 /* fall through */ 2016 2017 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 2018 if (!hci_le_supported()){ 2019 // SKIP LE init for Classic only configuration 2020 hci_init_done(); 2021 return; 2022 } 2023 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2024 break; 2025 2026 #else /* !ENABLE_SCO_OVER_HCI */ 2027 2028 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 2029 #ifdef ENABLE_SCO_OVER_PCM 2030 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 2031 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 2032 return; 2033 } 2034 #endif 2035 /* fall through */ 2036 2037 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2038 #ifdef ENABLE_BLE 2039 if (hci_le_supported()){ 2040 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 2041 return; 2042 } 2043 #endif 2044 // SKIP LE init for Classic only configuration 2045 hci_init_done(); 2046 return; 2047 #endif /* ENABLE_SCO_OVER_HCI */ 2048 2049 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 2050 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 2051 // Response to command before init done state -> init done 2052 case (HCI_INIT_DONE-1): 2053 hci_init_done(); 2054 return; 2055 #endif 2056 2057 default: 2058 break; 2059 } 2060 hci_initializing_next_state(); 2061 } 2062 2063 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2064 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2065 bd_addr_t bd_address; 2066 (void)memcpy(&bd_address, conn->address, 6); 2067 2068 #ifdef ENABLE_CLASSIC 2069 // cache needed data 2070 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2071 #endif 2072 2073 // connection failed, remove entry 2074 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2075 btstack_memory_hci_connection_free( conn ); 2076 2077 #ifdef ENABLE_CLASSIC 2078 // notify client if dedicated bonding 2079 if (notify_dedicated_bonding_failed){ 2080 log_info("hci notify_dedicated_bonding_failed"); 2081 hci_emit_dedicated_bonding_result(bd_address, status); 2082 } 2083 2084 // if authentication error, also delete link key 2085 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2086 gap_drop_link_key_for_bd_addr(bd_address); 2087 } 2088 #else 2089 UNUSED(status); 2090 #endif 2091 } 2092 2093 #ifdef ENABLE_CLASSIC 2094 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2095 // SSP Controller 2096 if (features[6] & (1 << 3)){ 2097 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2098 } 2099 // eSCO 2100 if (features[3] & (1<<7)){ 2101 conn->remote_supported_features[0] |= 1; 2102 } 2103 // Extended features 2104 if (features[7] & (1<<7)){ 2105 conn->remote_supported_features[0] |= 2; 2106 } 2107 } 2108 2109 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2110 // SSP Host 2111 if (features[0] & (1 << 0)){ 2112 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2113 } 2114 // SC Host 2115 if (features[0] & (1 << 3)){ 2116 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2117 } 2118 } 2119 2120 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2121 // SC Controller 2122 if (features[1] & (1 << 0)){ 2123 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2124 } 2125 } 2126 2127 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2128 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2129 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2130 if (conn->bonding_flags & BONDING_DEDICATED){ 2131 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2132 } 2133 } 2134 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2135 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2136 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2137 } 2138 2139 #endif 2140 2141 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2142 // handle BT initialization 2143 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2144 hci_initializing_event_handler(packet, size); 2145 } 2146 2147 // help with BT sleep 2148 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2149 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2150 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2151 hci_initializing_next_state(); 2152 } 2153 } 2154 2155 #ifdef ENABLE_CLASSIC 2156 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2157 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2158 conn->encryption_key_size = encryption_key_size; 2159 2160 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2161 conn->requested_security_level = LEVEL_0; 2162 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2163 return; 2164 } 2165 2166 // Request Authentication if not already done 2167 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2168 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2169 } 2170 #endif 2171 2172 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2173 UNUSED(size); 2174 2175 uint16_t manufacturer; 2176 #ifdef ENABLE_CLASSIC 2177 hci_con_handle_t handle; 2178 hci_connection_t * conn; 2179 uint8_t status; 2180 #endif 2181 // get num cmd packets - limit to 1 to reduce complexity 2182 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2183 2184 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2185 switch (opcode){ 2186 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2187 if (packet[5]) break; 2188 // terminate, name 248 chars 2189 packet[6+248] = 0; 2190 log_info("local name: %s", &packet[6]); 2191 break; 2192 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2193 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2194 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2195 uint16_t acl_len = little_endian_read_16(packet, 6); 2196 uint16_t sco_len = packet[8]; 2197 2198 // determine usable ACL/SCO payload size 2199 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2200 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2201 2202 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2203 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2204 2205 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2206 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2207 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2208 } 2209 break; 2210 case HCI_OPCODE_HCI_READ_RSSI: 2211 if (packet[5] == ERROR_CODE_SUCCESS){ 2212 uint8_t event[5]; 2213 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2214 event[1] = 3; 2215 (void)memcpy(&event[2], &packet[6], 3); 2216 hci_emit_event(event, sizeof(event), 1); 2217 } 2218 break; 2219 #ifdef ENABLE_BLE 2220 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2221 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2222 hci_stack->le_acl_packets_total_num = packet[8]; 2223 // determine usable ACL payload size 2224 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2225 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2226 } 2227 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2228 break; 2229 #endif 2230 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2231 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2232 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2233 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2234 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); 2235 break; 2236 #endif 2237 #ifdef ENABLE_LE_CENTRAL 2238 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2239 hci_stack->le_whitelist_capacity = packet[6]; 2240 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2241 break; 2242 #endif 2243 case HCI_OPCODE_HCI_READ_BD_ADDR: 2244 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2245 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)); 2246 #ifdef ENABLE_CLASSIC 2247 if (hci_stack->link_key_db){ 2248 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2249 } 2250 #endif 2251 break; 2252 #ifdef ENABLE_CLASSIC 2253 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2254 hci_emit_discoverable_enabled(hci_stack->discoverable); 2255 break; 2256 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2257 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2258 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2259 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2260 hci_emit_event(event, sizeof(event), 1); 2261 } 2262 break; 2263 #endif 2264 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2265 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2266 2267 #ifdef ENABLE_CLASSIC 2268 // determine usable ACL packet types based on host buffer size and supported features 2269 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2270 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2271 #endif 2272 // Classic/LE 2273 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2274 break; 2275 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2276 manufacturer = little_endian_read_16(packet, 10); 2277 // map Cypress to Broadcom 2278 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2279 log_info("Treat Cypress as Broadcom"); 2280 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2281 little_endian_store_16(packet, 10, manufacturer); 2282 } 2283 hci_stack->manufacturer = manufacturer; 2284 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2285 break; 2286 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2287 hci_stack->local_supported_commands[0] = 2288 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2289 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2290 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2291 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2292 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2293 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2294 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2295 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2296 hci_stack->local_supported_commands[1] = 2297 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2298 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2299 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2300 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2301 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2302 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2303 break; 2304 #ifdef ENABLE_CLASSIC 2305 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2306 if (packet[5]) return; 2307 hci_stack->synchronous_flow_control_enabled = 1; 2308 break; 2309 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2310 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2311 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2312 conn = hci_connection_for_handle(handle); 2313 if (conn != NULL) { 2314 uint8_t key_size = 0; 2315 if (status == 0){ 2316 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2317 log_info("Handle %04x key Size: %u", handle, key_size); 2318 } else { 2319 key_size = 1; 2320 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2321 } 2322 hci_handle_read_encryption_key_size_complete(conn, key_size); 2323 } 2324 break; 2325 // assert pairing complete event is emitted. 2326 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2327 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2328 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2329 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2330 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2331 // lookup connection by gap pairing addr 2332 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2333 if (conn == NULL) break; 2334 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2335 break; 2336 2337 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2338 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2339 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2340 uint8_t event[67]; 2341 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2342 event[1] = 65; 2343 (void)memset(&event[2], 0, 65); 2344 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2345 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2346 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2347 event[2] = 3; 2348 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2349 } else { 2350 event[2] = 1; 2351 } 2352 } 2353 hci_emit_event(event, sizeof(event), 0); 2354 break; 2355 } 2356 2357 // note: only needed if user does not provide OOB data 2358 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2359 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2360 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2361 if (conn == NULL) break; 2362 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2363 break; 2364 #endif 2365 #endif 2366 default: 2367 break; 2368 } 2369 } 2370 2371 #ifdef ENABLE_BLE 2372 static void event_handle_le_connection_complete(const uint8_t * packet){ 2373 bd_addr_t addr; 2374 bd_addr_type_t addr_type; 2375 hci_connection_t * conn; 2376 2377 // Connection management 2378 reverse_bd_addr(&packet[8], addr); 2379 addr_type = (bd_addr_type_t)packet[7]; 2380 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2381 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2382 2383 #ifdef ENABLE_LE_CENTRAL 2384 // handle error: error is reported only to the initiator -> outgoing connection 2385 if (packet[3]){ 2386 2387 // handle cancelled outgoing connection 2388 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2389 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2390 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2391 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2392 // reset state 2393 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2394 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2395 // get outgoing connection conn struct for direct connect 2396 conn = gap_get_outgoing_connection(); 2397 } 2398 2399 // outgoing le connection establishment is done 2400 if (conn){ 2401 // remove entry 2402 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2403 btstack_memory_hci_connection_free( conn ); 2404 } 2405 return; 2406 } 2407 #endif 2408 2409 // on success, both hosts receive connection complete event 2410 if (packet[6] == HCI_ROLE_MASTER){ 2411 #ifdef ENABLE_LE_CENTRAL 2412 // if we're master on an le connection, it was an outgoing connection and we're done with it 2413 // note: no hci_connection_t object exists yet for connect with whitelist 2414 if (hci_is_le_connection_type(addr_type)){ 2415 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2416 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2417 } 2418 #endif 2419 } else { 2420 #ifdef ENABLE_LE_PERIPHERAL 2421 // if we're slave, it was an incoming connection, advertisements have stopped 2422 hci_stack->le_advertisements_active = false; 2423 #endif 2424 } 2425 2426 // LE connections are auto-accepted, so just create a connection if there isn't one already 2427 if (!conn){ 2428 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2429 } 2430 2431 // no memory, sorry. 2432 if (!conn){ 2433 return; 2434 } 2435 2436 conn->state = OPEN; 2437 conn->role = packet[6]; 2438 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2439 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2440 2441 #ifdef ENABLE_LE_PERIPHERAL 2442 if (packet[6] == HCI_ROLE_SLAVE){ 2443 hci_update_advertisements_enabled_for_current_roles(); 2444 } 2445 #endif 2446 2447 // init unenhanced att bearer mtu 2448 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2449 conn->att_connection.mtu_exchanged = false; 2450 2451 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2452 2453 // restart timer 2454 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2455 // btstack_run_loop_add_timer(&conn->timeout); 2456 2457 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2458 2459 hci_emit_nr_connections_changed(); 2460 } 2461 #endif 2462 2463 #ifdef ENABLE_CLASSIC 2464 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){ 2465 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2466 // LEVEL_4 is tested by l2cap 2467 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2468 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2469 if (level >= LEVEL_3){ 2470 // MITM not possible without keyboard or display 2471 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2472 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2473 2474 // MITM possible if one side has keyboard and the other has keyboard or display 2475 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2476 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2477 2478 // MITM not possible if one side has only display and other side has no keyboard 2479 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2480 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2481 } 2482 // LEVEL 2 requires SSP, which is a given 2483 return true; 2484 } 2485 2486 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2487 uint16_t i; 2488 for (i=0; i < size ; i++){ 2489 if (data[i] != 0) { 2490 return false; 2491 } 2492 } 2493 return true; 2494 } 2495 2496 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2497 // get requested security level 2498 gap_security_level_t requested_security_level = conn->requested_security_level; 2499 if (hci_stack->gap_secure_connections_only_mode){ 2500 requested_security_level = LEVEL_4; 2501 } 2502 2503 // assess security: LEVEL 4 requires SC 2504 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2505 if ((requested_security_level == LEVEL_4) && 2506 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2507 !hci_remote_sc_enabled(conn)){ 2508 log_info("Level 4 required, but SC not supported -> abort"); 2509 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2510 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2511 return; 2512 } 2513 2514 // assess security based on io capabilities 2515 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2516 // responder: fully validate io caps of both sides as well as OOB data 2517 bool security_possible = false; 2518 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2519 2520 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2521 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2522 // so we merge the OOB data availability 2523 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2524 if (conn->classic_oob_c_192 != NULL){ 2525 have_oob_data |= 1; 2526 } 2527 if (conn->classic_oob_c_256 != NULL){ 2528 have_oob_data |= 2; 2529 } 2530 // for up to Level 3, either P-192 as well as P-256 will do 2531 // 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 2532 // if remote does not SC, we should not receive P-256 data either 2533 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2534 security_possible = true; 2535 } 2536 // for Level 4, P-256 is needed 2537 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2538 security_possible = true; 2539 } 2540 #endif 2541 2542 if (security_possible == false){ 2543 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2544 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2545 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2546 return; 2547 } 2548 } else { 2549 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2550 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2551 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2552 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2553 log_info("Level 3+ required, but no input/output -> abort"); 2554 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2555 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2556 return; 2557 } 2558 #endif 2559 #endif 2560 } 2561 2562 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2563 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2564 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2565 } else { 2566 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2567 } 2568 #endif 2569 } 2570 2571 #endif 2572 2573 static void event_handler(uint8_t *packet, uint16_t size){ 2574 2575 uint16_t event_length = packet[1]; 2576 2577 // assert packet is complete 2578 if (size != (event_length + 2u)){ 2579 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2580 return; 2581 } 2582 2583 bd_addr_type_t addr_type; 2584 hci_con_handle_t handle; 2585 hci_connection_t * conn; 2586 int i; 2587 int create_connection_cmd; 2588 2589 #ifdef ENABLE_CLASSIC 2590 hci_link_type_t link_type; 2591 bd_addr_t addr; 2592 #endif 2593 2594 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2595 2596 switch (hci_event_packet_get_type(packet)) { 2597 2598 case HCI_EVENT_COMMAND_COMPLETE: 2599 handle_command_complete_event(packet, size); 2600 break; 2601 2602 case HCI_EVENT_COMMAND_STATUS: 2603 // get num cmd packets - limit to 1 to reduce complexity 2604 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2605 2606 // check command status to detected failed outgoing connections 2607 create_connection_cmd = 0; 2608 #ifdef ENABLE_CLASSIC 2609 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2610 create_connection_cmd = 1; 2611 } 2612 #endif 2613 #ifdef ENABLE_LE_CENTRAL 2614 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2615 create_connection_cmd = 1; 2616 } 2617 #endif 2618 if (create_connection_cmd) { 2619 uint8_t status = hci_event_command_status_get_status(packet); 2620 addr_type = hci_stack->outgoing_addr_type; 2621 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2622 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); 2623 2624 // reset outgoing address info 2625 memset(hci_stack->outgoing_addr, 0, 6); 2626 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2627 2628 // on error 2629 if (status != ERROR_CODE_SUCCESS){ 2630 #ifdef ENABLE_LE_CENTRAL 2631 if (hci_is_le_connection_type(addr_type)){ 2632 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2633 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2634 } 2635 #endif 2636 // error => outgoing connection failed 2637 if (conn != NULL){ 2638 hci_handle_connection_failed(conn, status); 2639 } 2640 } 2641 } 2642 2643 #ifdef ENABLE_CLASSIC 2644 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2645 uint8_t status = hci_event_command_status_get_status(packet); 2646 log_info("command status (inquiry), status %x", status); 2647 if (status == ERROR_CODE_SUCCESS) { 2648 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2649 } else { 2650 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2651 } 2652 } 2653 #endif 2654 break; 2655 2656 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2657 if (size < 3) return; 2658 uint16_t num_handles = packet[2]; 2659 if (size != (3u + num_handles * 4u)) return; 2660 uint16_t offset = 3; 2661 for (i=0; i<num_handles;i++){ 2662 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2663 offset += 2u; 2664 uint16_t num_packets = little_endian_read_16(packet, offset); 2665 offset += 2u; 2666 2667 conn = hci_connection_for_handle(handle); 2668 if (!conn){ 2669 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2670 continue; 2671 } 2672 2673 if (conn->num_packets_sent >= num_packets){ 2674 conn->num_packets_sent -= num_packets; 2675 } else { 2676 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2677 conn->num_packets_sent = 0; 2678 } 2679 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2680 2681 #ifdef ENABLE_CLASSIC 2682 // For SCO, we do the can_send_now_check here 2683 hci_notify_if_sco_can_send_now(); 2684 #endif 2685 } 2686 break; 2687 } 2688 2689 #ifdef ENABLE_CLASSIC 2690 case HCI_EVENT_INQUIRY_COMPLETE: 2691 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2692 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2693 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2694 hci_emit_event(event, sizeof(event), 1); 2695 } 2696 break; 2697 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2698 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2699 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2700 } 2701 break; 2702 case HCI_EVENT_CONNECTION_REQUEST: 2703 reverse_bd_addr(&packet[2], addr); 2704 link_type = (hci_link_type_t) packet[11]; 2705 2706 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2707 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2708 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2709 bd_addr_copy(hci_stack->decline_addr, addr); 2710 break; 2711 } 2712 2713 if (hci_stack->gap_classic_accept_callback != NULL){ 2714 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2715 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2716 bd_addr_copy(hci_stack->decline_addr, addr); 2717 break; 2718 } 2719 } 2720 2721 // TODO: eval COD 8-10 2722 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2723 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2724 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2725 if (!conn) { 2726 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2727 } 2728 if (!conn) { 2729 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2730 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2731 bd_addr_copy(hci_stack->decline_addr, addr); 2732 break; 2733 } 2734 conn->role = HCI_ROLE_SLAVE; 2735 conn->state = RECEIVED_CONNECTION_REQUEST; 2736 // store info about eSCO 2737 if (link_type == HCI_LINK_TYPE_ESCO){ 2738 conn->remote_supported_features[0] |= 1; 2739 } 2740 hci_run(); 2741 break; 2742 2743 case HCI_EVENT_CONNECTION_COMPLETE: 2744 // Connection management 2745 reverse_bd_addr(&packet[5], addr); 2746 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2747 addr_type = BD_ADDR_TYPE_ACL; 2748 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2749 if (conn) { 2750 if (!packet[2]){ 2751 conn->state = OPEN; 2752 conn->con_handle = little_endian_read_16(packet, 3); 2753 2754 // queue get remote feature 2755 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2756 2757 // queue set supervision timeout if we're master 2758 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2759 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2760 } 2761 2762 // restart timer 2763 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2764 btstack_run_loop_add_timer(&conn->timeout); 2765 2766 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2767 2768 hci_emit_nr_connections_changed(); 2769 } else { 2770 // connection failed 2771 hci_handle_connection_failed(conn, packet[2]); 2772 } 2773 } 2774 break; 2775 2776 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2777 reverse_bd_addr(&packet[5], addr); 2778 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2779 if (packet[2]){ 2780 // connection failed 2781 break; 2782 } 2783 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2784 if (!conn) { 2785 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2786 } 2787 if (!conn) { 2788 break; 2789 } 2790 conn->state = OPEN; 2791 conn->con_handle = little_endian_read_16(packet, 3); 2792 2793 #ifdef ENABLE_SCO_OVER_HCI 2794 // update SCO 2795 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2796 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2797 } 2798 // trigger can send now 2799 if (hci_have_usb_transport()){ 2800 hci_stack->sco_can_send_now = true; 2801 } 2802 #endif 2803 #ifdef HAVE_SCO_TRANSPORT 2804 // configure sco transport 2805 if (hci_stack->sco_transport != NULL){ 2806 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2807 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2808 } 2809 #endif 2810 break; 2811 2812 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2813 handle = little_endian_read_16(packet, 3); 2814 conn = hci_connection_for_handle(handle); 2815 if (!conn) break; 2816 if (!packet[2]){ 2817 const uint8_t * features = &packet[5]; 2818 hci_handle_remote_features_page_0(conn, features); 2819 2820 // read extended features if possible 2821 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2822 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2823 break; 2824 } 2825 } 2826 hci_handle_remote_features_received(conn); 2827 break; 2828 2829 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2830 handle = little_endian_read_16(packet, 3); 2831 conn = hci_connection_for_handle(handle); 2832 if (!conn) break; 2833 // status = ok, page = 1 2834 if (!packet[2]) { 2835 uint8_t page_number = packet[5]; 2836 uint8_t maximum_page_number = packet[6]; 2837 const uint8_t * features = &packet[7]; 2838 bool done = false; 2839 switch (page_number){ 2840 case 1: 2841 hci_handle_remote_features_page_1(conn, features); 2842 if (maximum_page_number >= 2){ 2843 // get Secure Connections (Controller) from Page 2 if available 2844 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2845 } else { 2846 // otherwise, assume SC (Controller) == SC (Host) 2847 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2848 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2849 } 2850 done = true; 2851 } 2852 break; 2853 case 2: 2854 hci_handle_remote_features_page_2(conn, features); 2855 done = true; 2856 break; 2857 default: 2858 break; 2859 } 2860 if (!done) break; 2861 } 2862 hci_handle_remote_features_received(conn); 2863 break; 2864 2865 case HCI_EVENT_LINK_KEY_REQUEST: 2866 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2867 hci_event_link_key_request_get_bd_addr(packet, addr); 2868 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2869 if (!conn) break; 2870 2871 // lookup link key in db if not cached 2872 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2873 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2874 } 2875 2876 // response sent by hci_run() 2877 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2878 #endif 2879 break; 2880 2881 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2882 hci_event_link_key_request_get_bd_addr(packet, addr); 2883 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2884 if (!conn) break; 2885 2886 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2887 2888 // CVE-2020-26555: ignore NULL link key 2889 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2890 if (btstack_is_null(&packet[8], 16)) break; 2891 2892 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2893 // Change Connection Encryption keeps link key type 2894 if (link_key_type != CHANGED_COMBINATION_KEY){ 2895 conn->link_key_type = link_key_type; 2896 } 2897 2898 // cache link key. link keys stored in little-endian format for legacy reasons 2899 memcpy(&conn->link_key, &packet[8], 16); 2900 2901 // only store link key: 2902 // - if bondable enabled 2903 if (hci_stack->bondable == false) break; 2904 // - if security level sufficient 2905 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2906 // - for SSP, also check if remote side requested bonding as well 2907 if (conn->link_key_type != COMBINATION_KEY){ 2908 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2909 if (!remote_bonding){ 2910 break; 2911 } 2912 } 2913 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2914 break; 2915 } 2916 2917 case HCI_EVENT_PIN_CODE_REQUEST: 2918 hci_event_pin_code_request_get_bd_addr(packet, addr); 2919 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2920 if (!conn) break; 2921 2922 hci_pairing_started(conn, false); 2923 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2924 if (!hci_stack->bondable ){ 2925 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2926 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2927 hci_run(); 2928 return; 2929 } 2930 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2931 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2932 log_info("Level 4 required, but SC not supported -> abort"); 2933 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2934 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2935 hci_run(); 2936 return; 2937 } 2938 break; 2939 2940 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2941 hci_event_io_capability_response_get_bd_addr(packet, addr); 2942 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2943 if (!conn) break; 2944 2945 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2946 hci_pairing_started(conn, true); 2947 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2948 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2949 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2950 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2951 #endif 2952 break; 2953 2954 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2955 hci_event_io_capability_response_get_bd_addr(packet, addr); 2956 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2957 if (!conn) break; 2958 2959 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2960 hci_connection_timestamp(conn); 2961 hci_pairing_started(conn, true); 2962 break; 2963 2964 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2965 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2966 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2967 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2968 if (!conn) break; 2969 2970 hci_connection_timestamp(conn); 2971 2972 hci_pairing_started(conn, true); 2973 2974 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2975 break; 2976 #endif 2977 2978 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2979 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2980 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2981 if (!conn) break; 2982 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2983 if (hci_stack->ssp_auto_accept){ 2984 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2985 }; 2986 } else { 2987 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2988 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2989 // don't forward event to app 2990 hci_run(); 2991 return; 2992 } 2993 break; 2994 2995 case HCI_EVENT_USER_PASSKEY_REQUEST: 2996 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2997 if (hci_stack->ssp_auto_accept){ 2998 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2999 }; 3000 break; 3001 3002 case HCI_EVENT_MODE_CHANGE: 3003 handle = hci_event_mode_change_get_handle(packet); 3004 conn = hci_connection_for_handle(handle); 3005 if (!conn) break; 3006 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3007 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3008 break; 3009 #endif 3010 3011 case HCI_EVENT_ENCRYPTION_CHANGE: 3012 handle = hci_event_encryption_change_get_connection_handle(packet); 3013 conn = hci_connection_for_handle(handle); 3014 if (!conn) break; 3015 if (hci_event_encryption_change_get_status(packet) == 0u) { 3016 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3017 if (encryption_enabled){ 3018 if (hci_is_le_connection(conn)){ 3019 // For LE, we accept connection as encrypted 3020 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3021 } 3022 #ifdef ENABLE_CLASSIC 3023 else { 3024 3025 // dedicated bonding: send result and disconnect 3026 if (conn->bonding_flags & BONDING_DEDICATED){ 3027 conn->bonding_flags &= ~BONDING_DEDICATED; 3028 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3029 conn->bonding_status = packet[2]; 3030 break; 3031 } 3032 3033 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3034 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3035 bool connected_uses_aes_ccm = encryption_enabled == 2; 3036 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3037 log_info("SC during pairing, but only E0 now -> abort"); 3038 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3039 break; 3040 } 3041 3042 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3043 if (connected_uses_aes_ccm){ 3044 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3045 } 3046 3047 #ifdef ENABLE_TESTING_SUPPORT 3048 // work around for issue with PTS dongle 3049 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3050 #endif 3051 3052 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3053 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3054 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3055 } else { 3056 // if not, pretend everything is perfect 3057 hci_handle_read_encryption_key_size_complete(conn, 16); 3058 } 3059 } 3060 #endif 3061 } else { 3062 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3063 } 3064 } 3065 3066 break; 3067 3068 #ifdef ENABLE_CLASSIC 3069 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3070 handle = hci_event_authentication_complete_get_connection_handle(packet); 3071 conn = hci_connection_for_handle(handle); 3072 if (!conn) break; 3073 3074 // clear authentication active flag 3075 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3076 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3077 3078 // authenticated only if auth status == 0 3079 if (hci_event_authentication_complete_get_status(packet) == 0){ 3080 // authenticated 3081 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3082 3083 // If not already encrypted, start encryption 3084 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3085 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3086 break; 3087 } 3088 } 3089 3090 // emit updated security level 3091 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3092 break; 3093 3094 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3095 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3096 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3097 if (!conn) break; 3098 3099 // treat successfully paired connection as authenticated 3100 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3101 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3102 } 3103 3104 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3105 break; 3106 #endif 3107 3108 // HCI_EVENT_DISCONNECTION_COMPLETE 3109 // has been split, to first notify stack before shutting connection down 3110 // see end of function, too. 3111 case HCI_EVENT_DISCONNECTION_COMPLETE: 3112 if (packet[2]) break; // status != 0 3113 handle = little_endian_read_16(packet, 3); 3114 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3115 if (hci_stack->acl_fragmentation_total_size > 0u) { 3116 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3117 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3118 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3119 hci_stack->acl_fragmentation_total_size = 0; 3120 hci_stack->acl_fragmentation_pos = 0; 3121 if (release_buffer){ 3122 hci_release_packet_buffer(); 3123 } 3124 } 3125 } 3126 3127 conn = hci_connection_for_handle(handle); 3128 if (!conn) break; 3129 #ifdef ENABLE_CLASSIC 3130 // pairing failed if it was ongoing 3131 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3132 #endif 3133 3134 // emit dedicatd bonding event 3135 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3136 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3137 } 3138 3139 // mark connection for shutdown, stop timers, reset state 3140 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3141 hci_connection_stop_timer(conn); 3142 hci_connection_init(conn); 3143 3144 #ifdef ENABLE_BLE 3145 #ifdef ENABLE_LE_PERIPHERAL 3146 // re-enable advertisements for le connections if active 3147 if (hci_is_le_connection(conn)){ 3148 hci_update_advertisements_enabled_for_current_roles(); 3149 } 3150 #endif 3151 #endif 3152 break; 3153 3154 case HCI_EVENT_HARDWARE_ERROR: 3155 log_error("Hardware Error: 0x%02x", packet[2]); 3156 if (hci_stack->hardware_error_callback){ 3157 (*hci_stack->hardware_error_callback)(packet[2]); 3158 } else { 3159 // if no special requests, just reboot stack 3160 hci_power_control_off(); 3161 hci_power_control_on(); 3162 } 3163 break; 3164 3165 #ifdef ENABLE_CLASSIC 3166 case HCI_EVENT_ROLE_CHANGE: 3167 if (packet[2]) break; // status != 0 3168 reverse_bd_addr(&packet[3], addr); 3169 addr_type = BD_ADDR_TYPE_ACL; 3170 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3171 if (!conn) break; 3172 conn->role = packet[9]; 3173 break; 3174 #endif 3175 3176 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3177 // release packet buffer only for asynchronous transport and if there are not further fragements 3178 if (hci_transport_synchronous()) { 3179 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3180 return; // instead of break: to avoid re-entering hci_run() 3181 } 3182 hci_stack->acl_fragmentation_tx_active = 0; 3183 if (hci_stack->acl_fragmentation_total_size) break; 3184 hci_release_packet_buffer(); 3185 3186 // L2CAP receives this event via the hci_emit_event below 3187 3188 #ifdef ENABLE_CLASSIC 3189 // For SCO, we do the can_send_now_check here 3190 hci_notify_if_sco_can_send_now(); 3191 #endif 3192 break; 3193 3194 #ifdef ENABLE_CLASSIC 3195 case HCI_EVENT_SCO_CAN_SEND_NOW: 3196 // For SCO, we do the can_send_now_check here 3197 hci_stack->sco_can_send_now = true; 3198 hci_notify_if_sco_can_send_now(); 3199 return; 3200 3201 // explode inquriy results for easier consumption 3202 case HCI_EVENT_INQUIRY_RESULT: 3203 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3204 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3205 gap_inquiry_explode(packet, size); 3206 break; 3207 #endif 3208 3209 #ifdef ENABLE_BLE 3210 case HCI_EVENT_LE_META: 3211 switch (packet[2]){ 3212 #ifdef ENABLE_LE_CENTRAL 3213 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3214 // log_info("advertising report received"); 3215 if (!hci_stack->le_scanning_enabled) break; 3216 le_handle_advertisement_report(packet, size); 3217 break; 3218 #endif 3219 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3220 event_handle_le_connection_complete(packet); 3221 break; 3222 3223 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3224 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3225 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3226 conn = hci_connection_for_handle(handle); 3227 if (!conn) break; 3228 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3229 break; 3230 3231 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3232 // connection 3233 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3234 conn = hci_connection_for_handle(handle); 3235 if (conn) { 3236 // read arguments 3237 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3238 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3239 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3240 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3241 3242 // validate against current connection parameter range 3243 le_connection_parameter_range_t existing_range; 3244 gap_get_connection_parameter_range(&existing_range); 3245 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3246 if (update_parameter){ 3247 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3248 conn->le_conn_interval_min = le_conn_interval_min; 3249 conn->le_conn_interval_max = le_conn_interval_max; 3250 conn->le_conn_latency = le_conn_latency; 3251 conn->le_supervision_timeout = le_supervision_timeout; 3252 } else { 3253 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3254 } 3255 } 3256 break; 3257 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3258 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3259 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3260 conn = hci_connection_for_handle(handle); 3261 if (conn) { 3262 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3263 } 3264 break; 3265 #endif 3266 default: 3267 break; 3268 } 3269 break; 3270 #endif 3271 case HCI_EVENT_VENDOR_SPECIFIC: 3272 // Vendor specific commands often create vendor specific event instead of num completed packets 3273 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3274 switch (hci_stack->manufacturer){ 3275 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3276 hci_stack->num_cmd_packets = 1; 3277 break; 3278 default: 3279 break; 3280 } 3281 break; 3282 default: 3283 break; 3284 } 3285 3286 handle_event_for_current_stack_state(packet, size); 3287 3288 // notify upper stack 3289 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3290 3291 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3292 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3293 handle = little_endian_read_16(packet, 3); 3294 hci_connection_t * aConn = hci_connection_for_handle(handle); 3295 // discard connection if app did not trigger a reconnect in the event handler 3296 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3297 hci_shutdown_connection(aConn); 3298 } 3299 } 3300 3301 // execute main loop 3302 hci_run(); 3303 } 3304 3305 #ifdef ENABLE_CLASSIC 3306 3307 #ifdef ENABLE_SCO_OVER_HCI 3308 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3309 static void sco_schedule_tx(hci_connection_t * conn); 3310 3311 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3312 log_debug("SCO TX Timeout"); 3313 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3314 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3315 if (!conn) return; 3316 3317 // trigger send 3318 conn->sco_tx_ready = 1; 3319 // extra packet if CVSD but SCO buffer is too short 3320 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3321 conn->sco_tx_ready++; 3322 } 3323 hci_notify_if_sco_can_send_now(); 3324 } 3325 3326 3327 #define SCO_TX_AFTER_RX_MS (6) 3328 3329 static void sco_schedule_tx(hci_connection_t * conn){ 3330 3331 uint32_t now = btstack_run_loop_get_time_ms(); 3332 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3333 int time_delta_ms = sco_tx_ms - now; 3334 3335 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3336 3337 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3338 btstack_run_loop_remove_timer(timer); 3339 btstack_run_loop_set_timer(timer, time_delta_ms); 3340 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3341 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3342 btstack_run_loop_add_timer(timer); 3343 } 3344 #endif 3345 3346 static void sco_handler(uint8_t * packet, uint16_t size){ 3347 // lookup connection struct 3348 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3349 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3350 if (!conn) return; 3351 3352 #ifdef ENABLE_SCO_OVER_HCI 3353 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3354 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3355 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3356 packet[2] = 0x3c; 3357 memmove(&packet[3], &packet[23], 63); 3358 size = 63; 3359 } 3360 } 3361 3362 if (hci_have_usb_transport()){ 3363 // Nothing to do 3364 } else { 3365 // 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); 3366 if (hci_stack->synchronous_flow_control_enabled == 0){ 3367 uint32_t now = btstack_run_loop_get_time_ms(); 3368 3369 if (!conn->sco_rx_valid){ 3370 // ignore first 10 packets 3371 conn->sco_rx_count++; 3372 // log_debug("sco rx count %u", conn->sco_rx_count); 3373 if (conn->sco_rx_count == 10) { 3374 // use first timestamp as is and pretent it just started 3375 conn->sco_rx_ms = now; 3376 conn->sco_rx_valid = 1; 3377 conn->sco_rx_count = 0; 3378 sco_schedule_tx(conn); 3379 } 3380 } else { 3381 // track expected arrival timme 3382 conn->sco_rx_count++; 3383 conn->sco_rx_ms += 7; 3384 int delta = (int32_t) (now - conn->sco_rx_ms); 3385 if (delta > 0){ 3386 conn->sco_rx_ms++; 3387 } 3388 // log_debug("sco rx %u", conn->sco_rx_ms); 3389 sco_schedule_tx(conn); 3390 } 3391 } 3392 } 3393 #endif 3394 3395 // deliver to app 3396 if (hci_stack->sco_packet_handler) { 3397 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3398 } 3399 3400 #ifdef HAVE_SCO_TRANSPORT 3401 // We can send one packet for each received packet 3402 conn->sco_tx_ready++; 3403 hci_notify_if_sco_can_send_now(); 3404 #endif 3405 3406 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3407 conn->num_packets_completed++; 3408 hci_stack->host_completed_packets = 1; 3409 hci_run(); 3410 #endif 3411 } 3412 #endif 3413 3414 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3415 hci_dump_packet(packet_type, 1, packet, size); 3416 switch (packet_type) { 3417 case HCI_EVENT_PACKET: 3418 event_handler(packet, size); 3419 break; 3420 case HCI_ACL_DATA_PACKET: 3421 acl_handler(packet, size); 3422 break; 3423 #ifdef ENABLE_CLASSIC 3424 case HCI_SCO_DATA_PACKET: 3425 sco_handler(packet, size); 3426 break; 3427 #endif 3428 default: 3429 break; 3430 } 3431 } 3432 3433 /** 3434 * @brief Add event packet handler. 3435 */ 3436 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3437 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3438 } 3439 3440 3441 /** Register HCI packet handlers */ 3442 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3443 hci_stack->acl_packet_handler = handler; 3444 } 3445 3446 #ifdef ENABLE_CLASSIC 3447 /** 3448 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3449 */ 3450 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3451 hci_stack->sco_packet_handler = handler; 3452 } 3453 #endif 3454 3455 static void hci_state_reset(void){ 3456 // no connections yet 3457 hci_stack->connections = NULL; 3458 3459 // keep discoverable/connectable as this has been requested by the client(s) 3460 // hci_stack->discoverable = 0; 3461 // hci_stack->connectable = 0; 3462 // hci_stack->bondable = 1; 3463 // hci_stack->own_addr_type = 0; 3464 3465 // buffer is free 3466 hci_stack->hci_packet_buffer_reserved = false; 3467 3468 // no pending cmds 3469 hci_stack->decline_reason = 0; 3470 3471 hci_stack->secure_connections_active = false; 3472 3473 #ifdef ENABLE_CLASSIC 3474 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3475 hci_stack->gap_tasks = 3476 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3477 GAP_TASK_SET_CLASS_OF_DEVICE | 3478 GAP_TASK_SET_LOCAL_NAME | 3479 GAP_TASK_SET_EIR_DATA | 3480 GAP_TASK_WRITE_SCAN_ENABLE; 3481 #endif 3482 3483 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3484 hci_stack->classic_read_local_oob_data = true; 3485 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3486 #endif 3487 3488 // LE 3489 #ifdef ENABLE_BLE 3490 memset(hci_stack->le_random_address, 0, 6); 3491 hci_stack->le_random_address_set = 0; 3492 #endif 3493 #ifdef ENABLE_LE_CENTRAL 3494 hci_stack->le_scanning_active = false; 3495 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3496 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3497 hci_stack->le_whitelist_capacity = 0; 3498 #endif 3499 #ifdef ENABLE_LE_PERIPHERAL 3500 hci_stack->le_advertisements_active = false; 3501 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3502 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3503 } 3504 if (hci_stack->le_advertisements_data != NULL){ 3505 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3506 } 3507 #endif 3508 } 3509 3510 #ifdef ENABLE_CLASSIC 3511 /** 3512 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3513 */ 3514 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3515 // store and open remote device db 3516 hci_stack->link_key_db = link_key_db; 3517 if (hci_stack->link_key_db) { 3518 hci_stack->link_key_db->open(); 3519 } 3520 } 3521 #endif 3522 3523 void hci_init(const hci_transport_t *transport, const void *config){ 3524 3525 #ifdef HAVE_MALLOC 3526 if (!hci_stack) { 3527 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3528 } 3529 #else 3530 hci_stack = &hci_stack_static; 3531 #endif 3532 memset(hci_stack, 0, sizeof(hci_stack_t)); 3533 3534 // reference to use transport layer implementation 3535 hci_stack->hci_transport = transport; 3536 3537 // reference to used config 3538 hci_stack->config = config; 3539 3540 // setup pointer for outgoing packet buffer 3541 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3542 3543 // max acl payload size defined in config.h 3544 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3545 3546 // register packet handlers with transport 3547 transport->register_packet_handler(&packet_handler); 3548 3549 hci_stack->state = HCI_STATE_OFF; 3550 3551 // class of device 3552 hci_stack->class_of_device = 0x007a020c; // Smartphone 3553 3554 // bondable by default 3555 hci_stack->bondable = 1; 3556 3557 #ifdef ENABLE_CLASSIC 3558 // classic name 3559 hci_stack->local_name = default_classic_name; 3560 3561 // Master slave policy 3562 hci_stack->master_slave_policy = 1; 3563 3564 // Allow Role Switch 3565 hci_stack->allow_role_switch = 1; 3566 3567 // Default / minimum security level = 2 3568 hci_stack->gap_security_level = LEVEL_2; 3569 3570 // Default Security Mode 4 3571 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3572 3573 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3574 hci_stack->gap_required_encyrption_key_size = 7; 3575 3576 // Link Supervision Timeout 3577 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3578 3579 #endif 3580 3581 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3582 hci_stack->ssp_enable = 1; 3583 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3584 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3585 hci_stack->ssp_auto_accept = 1; 3586 3587 // Secure Connections: enable (requires support from Controller) 3588 hci_stack->secure_connections_enable = true; 3589 3590 // voice setting - signed 16 bit pcm data with CVSD over the air 3591 hci_stack->sco_voice_setting = 0x60; 3592 3593 #ifdef ENABLE_LE_CENTRAL 3594 // connection parameter to use for outgoing connections 3595 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3596 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3597 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3598 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3599 hci_stack->le_connection_latency = 4; // 4 3600 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3601 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3602 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3603 3604 // default LE Scanning 3605 hci_stack->le_scan_type = 0x1; // active 3606 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3607 hci_stack->le_scan_window = 0x30; // 30 ms 3608 #endif 3609 3610 #ifdef ENABLE_LE_PERIPHERAL 3611 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3612 #endif 3613 3614 // connection parameter range used to answer connection parameter update requests in l2cap 3615 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3616 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3617 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3618 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3619 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3620 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3621 3622 hci_state_reset(); 3623 } 3624 3625 void hci_deinit(void){ 3626 #ifdef HAVE_MALLOC 3627 if (hci_stack) { 3628 free(hci_stack); 3629 } 3630 #endif 3631 hci_stack = NULL; 3632 3633 #ifdef ENABLE_CLASSIC 3634 disable_l2cap_timeouts = 0; 3635 #endif 3636 } 3637 3638 /** 3639 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3640 */ 3641 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3642 hci_stack->chipset = chipset_driver; 3643 3644 // reset chipset driver - init is also called on power_up 3645 if (hci_stack->chipset && hci_stack->chipset->init){ 3646 hci_stack->chipset->init(hci_stack->config); 3647 } 3648 } 3649 3650 /** 3651 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3652 */ 3653 void hci_set_control(const btstack_control_t *hardware_control){ 3654 // references to used control implementation 3655 hci_stack->control = hardware_control; 3656 // init with transport config 3657 hardware_control->init(hci_stack->config); 3658 } 3659 3660 void hci_close(void){ 3661 3662 #ifdef ENABLE_CLASSIC 3663 // close remote device db 3664 if (hci_stack->link_key_db) { 3665 hci_stack->link_key_db->close(); 3666 } 3667 #endif 3668 3669 btstack_linked_list_iterator_t lit; 3670 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3671 while (btstack_linked_list_iterator_has_next(&lit)){ 3672 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3673 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3674 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3675 hci_shutdown_connection(connection); 3676 } 3677 3678 hci_power_control(HCI_POWER_OFF); 3679 3680 #ifdef HAVE_MALLOC 3681 free(hci_stack); 3682 #endif 3683 hci_stack = NULL; 3684 } 3685 3686 #ifdef HAVE_SCO_TRANSPORT 3687 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3688 hci_stack->sco_transport = sco_transport; 3689 sco_transport->register_packet_handler(&packet_handler); 3690 } 3691 #endif 3692 3693 #ifdef ENABLE_CLASSIC 3694 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3695 // validate ranage and set 3696 if (encryption_key_size < 7) return; 3697 if (encryption_key_size > 16) return; 3698 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3699 } 3700 3701 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3702 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3703 hci_stack->gap_security_mode = security_mode; 3704 return ERROR_CODE_SUCCESS; 3705 } else { 3706 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3707 } 3708 } 3709 3710 gap_security_mode_t gap_get_security_mode(void){ 3711 return hci_stack->gap_security_mode; 3712 } 3713 3714 void gap_set_security_level(gap_security_level_t security_level){ 3715 hci_stack->gap_security_level = security_level; 3716 } 3717 3718 gap_security_level_t gap_get_security_level(void){ 3719 if (hci_stack->gap_secure_connections_only_mode){ 3720 return LEVEL_4; 3721 } 3722 return hci_stack->gap_security_level; 3723 } 3724 3725 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3726 hci_stack->gap_minimal_service_security_level = security_level; 3727 } 3728 3729 void gap_set_secure_connections_only_mode(bool enable){ 3730 hci_stack->gap_secure_connections_only_mode = enable; 3731 } 3732 3733 bool gap_get_secure_connections_only_mode(void){ 3734 return hci_stack->gap_secure_connections_only_mode; 3735 } 3736 #endif 3737 3738 #ifdef ENABLE_CLASSIC 3739 void gap_set_class_of_device(uint32_t class_of_device){ 3740 hci_stack->class_of_device = class_of_device; 3741 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3742 hci_run(); 3743 } 3744 3745 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3746 hci_stack->default_link_policy_settings = default_link_policy_settings; 3747 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3748 hci_run(); 3749 } 3750 3751 void gap_set_allow_role_switch(bool allow_role_switch){ 3752 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3753 } 3754 3755 uint8_t hci_get_allow_role_switch(void){ 3756 return hci_stack->allow_role_switch; 3757 } 3758 3759 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3760 hci_stack->link_supervision_timeout = link_supervision_timeout; 3761 } 3762 3763 void hci_disable_l2cap_timeout_check(void){ 3764 disable_l2cap_timeouts = 1; 3765 } 3766 #endif 3767 3768 #ifndef HAVE_HOST_CONTROLLER_API 3769 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3770 void hci_set_bd_addr(bd_addr_t addr){ 3771 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3772 hci_stack->custom_bd_addr_set = 1; 3773 } 3774 #endif 3775 3776 // State-Module-Driver overview 3777 // state module low-level 3778 // HCI_STATE_OFF off close 3779 // HCI_STATE_INITIALIZING, on open 3780 // HCI_STATE_WORKING, on open 3781 // HCI_STATE_HALTING, on open 3782 // HCI_STATE_SLEEPING, off/sleep close 3783 // HCI_STATE_FALLING_ASLEEP on open 3784 3785 static int hci_power_control_on(void){ 3786 3787 // power on 3788 int err = 0; 3789 if (hci_stack->control && hci_stack->control->on){ 3790 err = (*hci_stack->control->on)(); 3791 } 3792 if (err){ 3793 log_error( "POWER_ON failed"); 3794 hci_emit_hci_open_failed(); 3795 return err; 3796 } 3797 3798 // int chipset driver 3799 if (hci_stack->chipset && hci_stack->chipset->init){ 3800 hci_stack->chipset->init(hci_stack->config); 3801 } 3802 3803 // init transport 3804 if (hci_stack->hci_transport->init){ 3805 hci_stack->hci_transport->init(hci_stack->config); 3806 } 3807 3808 // open transport 3809 err = hci_stack->hci_transport->open(); 3810 if (err){ 3811 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3812 if (hci_stack->control && hci_stack->control->off){ 3813 (*hci_stack->control->off)(); 3814 } 3815 hci_emit_hci_open_failed(); 3816 return err; 3817 } 3818 return 0; 3819 } 3820 3821 static void hci_power_control_off(void){ 3822 3823 log_info("hci_power_control_off"); 3824 3825 // close low-level device 3826 hci_stack->hci_transport->close(); 3827 3828 log_info("hci_power_control_off - hci_transport closed"); 3829 3830 // power off 3831 if (hci_stack->control && hci_stack->control->off){ 3832 (*hci_stack->control->off)(); 3833 } 3834 3835 log_info("hci_power_control_off - control closed"); 3836 3837 hci_stack->state = HCI_STATE_OFF; 3838 } 3839 3840 static void hci_power_control_sleep(void){ 3841 3842 log_info("hci_power_control_sleep"); 3843 3844 #if 0 3845 // don't close serial port during sleep 3846 3847 // close low-level device 3848 hci_stack->hci_transport->close(hci_stack->config); 3849 #endif 3850 3851 // sleep mode 3852 if (hci_stack->control && hci_stack->control->sleep){ 3853 (*hci_stack->control->sleep)(); 3854 } 3855 3856 hci_stack->state = HCI_STATE_SLEEPING; 3857 } 3858 3859 static int hci_power_control_wake(void){ 3860 3861 log_info("hci_power_control_wake"); 3862 3863 // wake on 3864 if (hci_stack->control && hci_stack->control->wake){ 3865 (*hci_stack->control->wake)(); 3866 } 3867 3868 #if 0 3869 // open low-level device 3870 int err = hci_stack->hci_transport->open(hci_stack->config); 3871 if (err){ 3872 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3873 if (hci_stack->control && hci_stack->control->off){ 3874 (*hci_stack->control->off)(); 3875 } 3876 hci_emit_hci_open_failed(); 3877 return err; 3878 } 3879 #endif 3880 3881 return 0; 3882 } 3883 3884 static void hci_power_transition_to_initializing(void){ 3885 // set up state machine 3886 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3887 hci_stack->hci_packet_buffer_reserved = false; 3888 hci_stack->state = HCI_STATE_INITIALIZING; 3889 hci_stack->substate = HCI_INIT_SEND_RESET; 3890 } 3891 3892 // returns error 3893 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3894 int err; 3895 switch (power_mode){ 3896 case HCI_POWER_ON: 3897 err = hci_power_control_on(); 3898 if (err != 0) { 3899 log_error("hci_power_control_on() error %d", err); 3900 return err; 3901 } 3902 hci_power_transition_to_initializing(); 3903 break; 3904 case HCI_POWER_OFF: 3905 // do nothing 3906 break; 3907 case HCI_POWER_SLEEP: 3908 // do nothing (with SLEEP == OFF) 3909 break; 3910 default: 3911 btstack_assert(false); 3912 break; 3913 } 3914 return ERROR_CODE_SUCCESS; 3915 } 3916 3917 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3918 switch (power_mode){ 3919 case HCI_POWER_ON: 3920 // do nothing 3921 break; 3922 case HCI_POWER_OFF: 3923 // no connections yet, just turn it off 3924 hci_power_control_off(); 3925 break; 3926 case HCI_POWER_SLEEP: 3927 // no connections yet, just turn it off 3928 hci_power_control_sleep(); 3929 break; 3930 default: 3931 btstack_assert(false); 3932 break; 3933 } 3934 return ERROR_CODE_SUCCESS; 3935 } 3936 3937 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3938 switch (power_mode){ 3939 case HCI_POWER_ON: 3940 // do nothing 3941 break; 3942 case HCI_POWER_OFF: 3943 // see hci_run 3944 hci_stack->state = HCI_STATE_HALTING; 3945 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3946 break; 3947 case HCI_POWER_SLEEP: 3948 // see hci_run 3949 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3950 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3951 break; 3952 default: 3953 btstack_assert(false); 3954 break; 3955 } 3956 return ERROR_CODE_SUCCESS; 3957 } 3958 3959 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3960 switch (power_mode){ 3961 case HCI_POWER_ON: 3962 hci_power_transition_to_initializing(); 3963 break; 3964 case HCI_POWER_OFF: 3965 // do nothing 3966 break; 3967 case HCI_POWER_SLEEP: 3968 // see hci_run 3969 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3970 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3971 break; 3972 default: 3973 btstack_assert(false); 3974 break; 3975 } 3976 return ERROR_CODE_SUCCESS; 3977 } 3978 3979 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3980 switch (power_mode){ 3981 case HCI_POWER_ON: 3982 hci_power_transition_to_initializing(); 3983 break; 3984 case HCI_POWER_OFF: 3985 // see hci_run 3986 hci_stack->state = HCI_STATE_HALTING; 3987 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3988 break; 3989 case HCI_POWER_SLEEP: 3990 // do nothing 3991 break; 3992 default: 3993 btstack_assert(false); 3994 break; 3995 } 3996 return ERROR_CODE_SUCCESS; 3997 } 3998 3999 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4000 int err; 4001 switch (power_mode){ 4002 case HCI_POWER_ON: 4003 err = hci_power_control_wake(); 4004 if (err) return err; 4005 hci_power_transition_to_initializing(); 4006 break; 4007 case HCI_POWER_OFF: 4008 hci_stack->state = HCI_STATE_HALTING; 4009 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4010 break; 4011 case HCI_POWER_SLEEP: 4012 // do nothing 4013 break; 4014 default: 4015 btstack_assert(false); 4016 break; 4017 } 4018 return ERROR_CODE_SUCCESS; 4019 } 4020 4021 int hci_power_control(HCI_POWER_MODE power_mode){ 4022 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4023 int err = 0; 4024 switch (hci_stack->state){ 4025 case HCI_STATE_OFF: 4026 err = hci_power_control_state_off(power_mode); 4027 break; 4028 case HCI_STATE_INITIALIZING: 4029 err = hci_power_control_state_initializing(power_mode); 4030 break; 4031 case HCI_STATE_WORKING: 4032 err = hci_power_control_state_working(power_mode); 4033 break; 4034 case HCI_STATE_HALTING: 4035 err = hci_power_control_state_halting(power_mode); 4036 break; 4037 case HCI_STATE_FALLING_ASLEEP: 4038 err = hci_power_control_state_falling_asleep(power_mode); 4039 break; 4040 case HCI_STATE_SLEEPING: 4041 err = hci_power_control_state_sleeping(power_mode); 4042 break; 4043 default: 4044 btstack_assert(false); 4045 break; 4046 } 4047 if (err != 0){ 4048 return err; 4049 } 4050 4051 // create internal event 4052 hci_emit_state(); 4053 4054 // trigger next/first action 4055 hci_run(); 4056 4057 return 0; 4058 } 4059 4060 4061 #ifdef ENABLE_CLASSIC 4062 4063 static void hci_update_scan_enable(void){ 4064 // 2 = page scan, 1 = inq scan 4065 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4066 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4067 hci_run(); 4068 } 4069 4070 void gap_discoverable_control(uint8_t enable){ 4071 if (enable) enable = 1; // normalize argument 4072 4073 if (hci_stack->discoverable == enable){ 4074 hci_emit_discoverable_enabled(hci_stack->discoverable); 4075 return; 4076 } 4077 4078 hci_stack->discoverable = enable; 4079 hci_update_scan_enable(); 4080 } 4081 4082 void gap_connectable_control(uint8_t enable){ 4083 if (enable) enable = 1; // normalize argument 4084 4085 // don't emit event 4086 if (hci_stack->connectable == enable) return; 4087 4088 hci_stack->connectable = enable; 4089 hci_update_scan_enable(); 4090 } 4091 #endif 4092 4093 void gap_local_bd_addr(bd_addr_t address_buffer){ 4094 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4095 } 4096 4097 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4098 static void hci_host_num_completed_packets(void){ 4099 4100 // create packet manually as arrays are not supported and num_commands should not get reduced 4101 hci_reserve_packet_buffer(); 4102 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4103 4104 uint16_t size = 0; 4105 uint16_t num_handles = 0; 4106 packet[size++] = 0x35; 4107 packet[size++] = 0x0c; 4108 size++; // skip param len 4109 size++; // skip num handles 4110 4111 // add { handle, packets } entries 4112 btstack_linked_item_t * it; 4113 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4114 hci_connection_t * connection = (hci_connection_t *) it; 4115 if (connection->num_packets_completed){ 4116 little_endian_store_16(packet, size, connection->con_handle); 4117 size += 2; 4118 little_endian_store_16(packet, size, connection->num_packets_completed); 4119 size += 2; 4120 // 4121 num_handles++; 4122 connection->num_packets_completed = 0; 4123 } 4124 } 4125 4126 packet[2] = size - 3; 4127 packet[3] = num_handles; 4128 4129 hci_stack->host_completed_packets = 0; 4130 4131 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4132 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4133 4134 // release packet buffer for synchronous transport implementations 4135 if (hci_transport_synchronous()){ 4136 hci_release_packet_buffer(); 4137 hci_emit_transport_packet_sent(); 4138 } 4139 } 4140 #endif 4141 4142 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4143 UNUSED(ds); 4144 hci_stack->substate = HCI_HALTING_CLOSE; 4145 // allow packet handlers to defer final shutdown 4146 hci_emit_state(); 4147 hci_run(); 4148 } 4149 4150 static bool hci_run_acl_fragments(void){ 4151 if (hci_stack->acl_fragmentation_total_size > 0u) { 4152 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4153 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4154 if (connection) { 4155 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4156 hci_send_acl_packet_fragments(connection); 4157 return true; 4158 } 4159 } else { 4160 // connection gone -> discard further fragments 4161 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4162 hci_stack->acl_fragmentation_total_size = 0; 4163 hci_stack->acl_fragmentation_pos = 0; 4164 } 4165 } 4166 return false; 4167 } 4168 4169 #ifdef ENABLE_CLASSIC 4170 static bool hci_run_general_gap_classic(void){ 4171 4172 // assert stack is working and classic is active 4173 if (hci_classic_supported() == false) return false; 4174 if (hci_stack->state != HCI_STATE_WORKING) return false; 4175 4176 // decline incoming connections 4177 if (hci_stack->decline_reason){ 4178 uint8_t reason = hci_stack->decline_reason; 4179 hci_stack->decline_reason = 0; 4180 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4181 return true; 4182 } 4183 4184 if (hci_stack->gap_tasks != 0){ 4185 hci_run_gap_tasks_classic(); 4186 return true; 4187 } 4188 4189 // start/stop inquiry 4190 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4191 uint8_t duration = hci_stack->inquiry_state; 4192 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4193 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4194 return true; 4195 } 4196 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4197 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4198 hci_send_cmd(&hci_inquiry_cancel); 4199 return true; 4200 } 4201 // remote name request 4202 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4203 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4204 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4205 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4206 return true; 4207 } 4208 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4209 // Local OOB data 4210 if (hci_stack->classic_read_local_oob_data){ 4211 hci_stack->classic_read_local_oob_data = false; 4212 if (hci_stack->local_supported_commands[1] & 0x10u){ 4213 hci_send_cmd(&hci_read_local_extended_oob_data); 4214 } else { 4215 hci_send_cmd(&hci_read_local_oob_data); 4216 } 4217 } 4218 #endif 4219 // pairing 4220 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4221 uint8_t state = hci_stack->gap_pairing_state; 4222 uint8_t pin_code[16]; 4223 switch (state){ 4224 case GAP_PAIRING_STATE_SEND_PIN: 4225 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4226 memset(pin_code, 0, 16); 4227 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4228 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4229 break; 4230 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4231 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4232 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4233 break; 4234 case GAP_PAIRING_STATE_SEND_PASSKEY: 4235 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4236 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4237 break; 4238 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4239 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4240 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4241 break; 4242 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4243 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4244 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4245 break; 4246 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4247 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4248 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4249 break; 4250 default: 4251 break; 4252 } 4253 return true; 4254 } 4255 return false; 4256 } 4257 #endif 4258 4259 #ifdef ENABLE_BLE 4260 static bool hci_run_general_gap_le(void){ 4261 4262 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4263 4264 if (hci_stack->state != HCI_STATE_WORKING) return false; 4265 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4266 4267 4268 // Phase 1: collect what to stop 4269 4270 bool scanning_stop = false; 4271 bool connecting_stop = false; 4272 bool advertising_stop = false; 4273 4274 #ifndef ENABLE_LE_CENTRAL 4275 UNUSED(scanning_stop); 4276 UNUSED(connecting_stop); 4277 #endif 4278 #ifndef ENABLE_LE_PERIPHERAL 4279 UNUSED(advertising_stop); 4280 #endif 4281 4282 // check if whitelist needs modification 4283 bool whitelist_modification_pending = false; 4284 btstack_linked_list_iterator_t lit; 4285 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4286 while (btstack_linked_list_iterator_has_next(&lit)){ 4287 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4288 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4289 whitelist_modification_pending = true; 4290 break; 4291 } 4292 } 4293 // check if resolving list needs modification 4294 bool resolving_list_modification_pending = false; 4295 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4296 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4297 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4298 resolving_list_modification_pending = true; 4299 } 4300 #endif 4301 4302 #ifdef ENABLE_LE_CENTRAL 4303 // scanning control 4304 if (hci_stack->le_scanning_active) { 4305 // stop if: 4306 // - parameter change required 4307 // - it's disabled 4308 // - whitelist change required but used for scanning 4309 // - resolving list modified 4310 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4311 if ((hci_stack->le_scanning_param_update) || 4312 !hci_stack->le_scanning_enabled || 4313 scanning_uses_whitelist || 4314 resolving_list_modification_pending){ 4315 4316 scanning_stop = true; 4317 } 4318 } 4319 #endif 4320 4321 #ifdef ENABLE_LE_CENTRAL 4322 // connecting control 4323 bool connecting_with_whitelist; 4324 switch (hci_stack->le_connecting_state){ 4325 case LE_CONNECTING_DIRECT: 4326 case LE_CONNECTING_WHITELIST: 4327 // stop connecting if: 4328 // - connecting uses white and whitelist modification pending 4329 // - if it got disabled 4330 // - resolving list modified 4331 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4332 if ((connecting_with_whitelist && whitelist_modification_pending) || 4333 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4334 resolving_list_modification_pending) { 4335 4336 connecting_stop = true; 4337 } 4338 break; 4339 default: 4340 break; 4341 } 4342 #endif 4343 4344 #ifdef ENABLE_LE_PERIPHERAL 4345 // le advertisement control 4346 if (hci_stack->le_advertisements_active){ 4347 // stop if: 4348 // - parameter change required 4349 // - it's disabled 4350 // - whitelist change required but used for advertisement filter policy 4351 // - resolving list modified 4352 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4353 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4354 if (advertising_change || 4355 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4356 (advertising_uses_whitelist & whitelist_modification_pending) || 4357 resolving_list_modification_pending) { 4358 4359 advertising_stop = true; 4360 } 4361 } 4362 #endif 4363 4364 4365 // Phase 2: stop everything that should be off during modifications 4366 4367 #ifdef ENABLE_LE_CENTRAL 4368 if (scanning_stop){ 4369 hci_stack->le_scanning_active = false; 4370 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4371 return true; 4372 } 4373 #endif 4374 4375 #ifdef ENABLE_LE_CENTRAL 4376 if (connecting_stop){ 4377 hci_send_cmd(&hci_le_create_connection_cancel); 4378 return true; 4379 } 4380 #endif 4381 4382 #ifdef ENABLE_LE_PERIPHERAL 4383 if (advertising_stop){ 4384 hci_stack->le_advertisements_active = false; 4385 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4386 return true; 4387 } 4388 #endif 4389 4390 // Phase 3: modify 4391 4392 #ifdef ENABLE_LE_CENTRAL 4393 if (hci_stack->le_scanning_param_update){ 4394 hci_stack->le_scanning_param_update = false; 4395 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4396 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4397 return true; 4398 } 4399 #endif 4400 4401 #ifdef ENABLE_LE_PERIPHERAL 4402 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4403 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4404 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4405 hci_send_cmd(&hci_le_set_advertising_parameters, 4406 hci_stack->le_advertisements_interval_min, 4407 hci_stack->le_advertisements_interval_max, 4408 hci_stack->le_advertisements_type, 4409 hci_stack->le_advertisements_own_addr_type, 4410 hci_stack->le_advertisements_direct_address_type, 4411 hci_stack->le_advertisements_direct_address, 4412 hci_stack->le_advertisements_channel_map, 4413 hci_stack->le_advertisements_filter_policy); 4414 return true; 4415 } 4416 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4417 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4418 uint8_t adv_data_clean[31]; 4419 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4420 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4421 hci_stack->le_advertisements_data_len); 4422 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4423 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4424 return true; 4425 } 4426 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4427 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4428 uint8_t scan_data_clean[31]; 4429 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4430 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4431 hci_stack->le_scan_response_data_len); 4432 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4433 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4434 return true; 4435 } 4436 #endif 4437 4438 4439 #ifdef ENABLE_LE_CENTRAL 4440 // if connect with whitelist was active and is not cancelled yet, wait until next time 4441 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4442 #endif 4443 4444 // LE Whitelist Management 4445 if (whitelist_modification_pending){ 4446 // add/remove entries 4447 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4448 while (btstack_linked_list_iterator_has_next(&lit)){ 4449 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4450 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4451 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4452 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4453 return true; 4454 } 4455 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4456 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4457 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4458 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4459 return true; 4460 } 4461 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4462 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4463 btstack_memory_whitelist_entry_free(entry); 4464 } 4465 } 4466 } 4467 4468 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4469 // LE Resolving List Management 4470 if (resolving_list_supported) { 4471 uint16_t i; 4472 switch (hci_stack->le_resolving_list_state) { 4473 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4474 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4475 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4476 return true; 4477 case LE_RESOLVING_LIST_READ_SIZE: 4478 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4479 hci_send_cmd(&hci_le_read_resolving_list_size); 4480 return true; 4481 case LE_RESOLVING_LIST_SEND_CLEAR: 4482 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4483 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4484 sizeof(hci_stack->le_resolving_list_add_entries)); 4485 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4486 sizeof(hci_stack->le_resolving_list_remove_entries)); 4487 hci_send_cmd(&hci_le_clear_resolving_list); 4488 return true; 4489 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4490 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4491 uint8_t offset = i >> 3; 4492 uint8_t mask = 1 << (i & 7); 4493 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4494 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4495 bd_addr_t peer_identity_addreses; 4496 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4497 sm_key_t peer_irk; 4498 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4499 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4500 4501 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4502 // trigger whitelist entry 'update' (work around for controller bug) 4503 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4504 while (btstack_linked_list_iterator_has_next(&lit)) { 4505 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4506 if (entry->address_type != peer_identity_addr_type) continue; 4507 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4508 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4509 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4510 } 4511 #endif 4512 4513 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4514 peer_identity_addreses); 4515 return true; 4516 } 4517 4518 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4519 4520 /* fall through */ 4521 4522 case LE_RESOLVING_LIST_ADD_ENTRIES: 4523 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4524 uint8_t offset = i >> 3; 4525 uint8_t mask = 1 << (i & 7); 4526 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4527 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4528 bd_addr_t peer_identity_addreses; 4529 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4530 sm_key_t peer_irk; 4531 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4532 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4533 const uint8_t *local_irk = gap_get_persistent_irk(); 4534 // command uses format specifier 'P' that stores 16-byte value without flip 4535 uint8_t local_irk_flipped[16]; 4536 uint8_t peer_irk_flipped[16]; 4537 reverse_128(local_irk, local_irk_flipped); 4538 reverse_128(peer_irk, peer_irk_flipped); 4539 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4540 peer_irk_flipped, local_irk_flipped); 4541 return true; 4542 } 4543 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4544 break; 4545 4546 default: 4547 break; 4548 } 4549 } 4550 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4551 #endif 4552 4553 // Phase 4: restore state 4554 4555 #ifdef ENABLE_LE_CENTRAL 4556 // re-start scanning 4557 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4558 hci_stack->le_scanning_active = true; 4559 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4560 return true; 4561 } 4562 #endif 4563 4564 #ifdef ENABLE_LE_CENTRAL 4565 // re-start connecting 4566 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4567 bd_addr_t null_addr; 4568 memset(null_addr, 0, 6); 4569 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4570 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4571 hci_send_cmd(&hci_le_create_connection, 4572 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4573 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4574 1, // use whitelist 4575 0, // peer address type 4576 null_addr, // peer bd addr 4577 hci_stack->le_connection_own_addr_type, // our addr type: 4578 hci_stack->le_connection_interval_min, // conn interval min 4579 hci_stack->le_connection_interval_max, // conn interval max 4580 hci_stack->le_connection_latency, // conn latency 4581 hci_stack->le_supervision_timeout, // conn latency 4582 hci_stack->le_minimum_ce_length, // min ce length 4583 hci_stack->le_maximum_ce_length // max ce length 4584 ); 4585 return true; 4586 } 4587 #endif 4588 4589 #ifdef ENABLE_LE_PERIPHERAL 4590 // re-start advertising 4591 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4592 // check if advertisements should be enabled given 4593 hci_stack->le_advertisements_active = true; 4594 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4595 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4596 return true; 4597 } 4598 #endif 4599 4600 return false; 4601 } 4602 #endif 4603 4604 static bool hci_run_general_pending_commands(void){ 4605 btstack_linked_item_t * it; 4606 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4607 hci_connection_t * connection = (hci_connection_t *) it; 4608 4609 switch(connection->state){ 4610 case SEND_CREATE_CONNECTION: 4611 switch(connection->address_type){ 4612 #ifdef ENABLE_CLASSIC 4613 case BD_ADDR_TYPE_ACL: 4614 log_info("sending hci_create_connection"); 4615 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4616 break; 4617 #endif 4618 default: 4619 #ifdef ENABLE_BLE 4620 #ifdef ENABLE_LE_CENTRAL 4621 log_info("sending hci_le_create_connection"); 4622 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4623 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4624 hci_send_cmd(&hci_le_create_connection, 4625 hci_stack->le_connection_scan_interval, // conn scan interval 4626 hci_stack->le_connection_scan_window, // conn scan windows 4627 0, // don't use whitelist 4628 connection->address_type, // peer address type 4629 connection->address, // peer bd addr 4630 hci_stack->le_connection_own_addr_type, // our addr type: 4631 hci_stack->le_connection_interval_min, // conn interval min 4632 hci_stack->le_connection_interval_max, // conn interval max 4633 hci_stack->le_connection_latency, // conn latency 4634 hci_stack->le_supervision_timeout, // conn latency 4635 hci_stack->le_minimum_ce_length, // min ce length 4636 hci_stack->le_maximum_ce_length // max ce length 4637 ); 4638 connection->state = SENT_CREATE_CONNECTION; 4639 #endif 4640 #endif 4641 break; 4642 } 4643 return true; 4644 4645 #ifdef ENABLE_CLASSIC 4646 case RECEIVED_CONNECTION_REQUEST: 4647 connection->role = HCI_ROLE_SLAVE; 4648 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4649 log_info("sending hci_accept_connection_request"); 4650 connection->state = ACCEPTED_CONNECTION_REQUEST; 4651 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4652 } 4653 return true; 4654 #endif 4655 4656 #ifdef ENABLE_BLE 4657 #ifdef ENABLE_LE_CENTRAL 4658 case SEND_CANCEL_CONNECTION: 4659 connection->state = SENT_CANCEL_CONNECTION; 4660 hci_send_cmd(&hci_le_create_connection_cancel); 4661 return true; 4662 #endif 4663 #endif 4664 case SEND_DISCONNECT: 4665 connection->state = SENT_DISCONNECT; 4666 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4667 return true; 4668 4669 default: 4670 break; 4671 } 4672 4673 // no further commands if connection is about to get shut down 4674 if (connection->state == SENT_DISCONNECT) continue; 4675 4676 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4677 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4678 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4679 return true; 4680 } 4681 4682 #ifdef ENABLE_CLASSIC 4683 4684 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4685 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4686 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4687 return true; 4688 } 4689 4690 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4691 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4692 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4693 return true; 4694 } 4695 4696 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4697 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4698 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4699 return true; 4700 } 4701 4702 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4703 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4704 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4705 return true; 4706 } 4707 4708 // Handling link key request requires remote supported features 4709 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4710 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4711 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4712 4713 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4714 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4715 if (have_link_key && security_level_sufficient){ 4716 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4717 } else { 4718 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4719 } 4720 return true; 4721 } 4722 4723 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4724 log_info("denying to pin request"); 4725 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4726 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4727 return true; 4728 } 4729 4730 // security assessment requires remote features 4731 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4732 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4733 hci_ssp_assess_security_on_io_cap_request(connection); 4734 // 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 4735 } 4736 4737 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4738 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4739 // set authentication requirements: 4740 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4741 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4742 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4743 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4744 authreq |= 1; 4745 } 4746 bool bonding = hci_stack->bondable; 4747 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4748 // if we have received IO Cap Response, we're in responder role 4749 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4750 if (bonding && !remote_bonding){ 4751 log_info("Remote not bonding, dropping local flag"); 4752 bonding = false; 4753 } 4754 } 4755 if (bonding){ 4756 if (connection->bonding_flags & BONDING_DEDICATED){ 4757 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4758 } else { 4759 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4760 } 4761 } 4762 uint8_t have_oob_data = 0; 4763 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4764 if (connection->classic_oob_c_192 != NULL){ 4765 have_oob_data |= 1; 4766 } 4767 if (connection->classic_oob_c_256 != NULL){ 4768 have_oob_data |= 2; 4769 } 4770 #endif 4771 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4772 return true; 4773 } 4774 4775 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4776 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4777 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4778 return true; 4779 } 4780 4781 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4782 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4783 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4784 const uint8_t zero[16] = { 0 }; 4785 const uint8_t * r_192 = zero; 4786 const uint8_t * c_192 = zero; 4787 const uint8_t * r_256 = zero; 4788 const uint8_t * c_256 = zero; 4789 // verify P-256 OOB 4790 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4791 c_256 = connection->classic_oob_c_256; 4792 if (connection->classic_oob_r_256 != NULL) { 4793 r_256 = connection->classic_oob_r_256; 4794 } 4795 } 4796 // verify P-192 OOB 4797 if ((connection->classic_oob_c_192 != NULL)) { 4798 c_192 = connection->classic_oob_c_192; 4799 if (connection->classic_oob_r_192 != NULL) { 4800 r_192 = connection->classic_oob_r_192; 4801 } 4802 } 4803 4804 // assess security 4805 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4806 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4807 if (need_level_4 && !can_reach_level_4){ 4808 log_info("Level 4 required, but not possible -> abort"); 4809 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4810 // send oob negative reply 4811 c_256 = NULL; 4812 c_192 = NULL; 4813 } 4814 4815 // Reply 4816 if (c_256 != zero) { 4817 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4818 } else if (c_192 != zero){ 4819 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4820 } else { 4821 hci_stack->classic_oob_con_handle = connection->con_handle; 4822 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4823 } 4824 return true; 4825 } 4826 #endif 4827 4828 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4829 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4830 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4831 return true; 4832 } 4833 4834 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4835 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4836 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4837 return true; 4838 } 4839 4840 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4841 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4842 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4843 return true; 4844 } 4845 4846 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4847 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4848 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4849 connection->state = SENT_DISCONNECT; 4850 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4851 return true; 4852 } 4853 4854 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4855 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4856 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4857 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4858 return true; 4859 } 4860 4861 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4862 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4863 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4864 return true; 4865 } 4866 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4867 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4868 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4869 return true; 4870 } 4871 #endif 4872 4873 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4874 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4875 #ifdef ENABLE_CLASSIC 4876 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4877 #endif 4878 if (connection->state != SENT_DISCONNECT){ 4879 connection->state = SENT_DISCONNECT; 4880 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4881 return true; 4882 } 4883 } 4884 4885 #ifdef ENABLE_CLASSIC 4886 uint16_t sniff_min_interval; 4887 switch (connection->sniff_min_interval){ 4888 case 0: 4889 break; 4890 case 0xffff: 4891 connection->sniff_min_interval = 0; 4892 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4893 return true; 4894 default: 4895 sniff_min_interval = connection->sniff_min_interval; 4896 connection->sniff_min_interval = 0; 4897 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4898 return true; 4899 } 4900 4901 if (connection->sniff_subrating_max_latency != 0xffff){ 4902 uint16_t max_latency = connection->sniff_subrating_max_latency; 4903 connection->sniff_subrating_max_latency = 0; 4904 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4905 return true; 4906 } 4907 4908 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4909 uint8_t service_type = (uint8_t) connection->qos_service_type; 4910 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4911 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); 4912 return true; 4913 } 4914 4915 if (connection->request_role != HCI_ROLE_INVALID){ 4916 hci_role_t role = connection->request_role; 4917 connection->request_role = HCI_ROLE_INVALID; 4918 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4919 return true; 4920 } 4921 #endif 4922 4923 #ifdef ENABLE_BLE 4924 switch (connection->le_con_parameter_update_state){ 4925 // response to L2CAP CON PARAMETER UPDATE REQUEST 4926 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4927 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4928 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4929 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4930 0x0000, 0xffff); 4931 return true; 4932 case CON_PARAMETER_UPDATE_REPLY: 4933 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4934 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4935 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4936 0x0000, 0xffff); 4937 return true; 4938 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4939 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4940 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4941 return true; 4942 default: 4943 break; 4944 } 4945 if (connection->le_phy_update_all_phys != 0xffu){ 4946 uint8_t all_phys = connection->le_phy_update_all_phys; 4947 connection->le_phy_update_all_phys = 0xff; 4948 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); 4949 return true; 4950 } 4951 #endif 4952 } 4953 return false; 4954 } 4955 4956 static void hci_run(void){ 4957 4958 bool done; 4959 4960 // send continuation fragments first, as they block the prepared packet buffer 4961 done = hci_run_acl_fragments(); 4962 if (done) return; 4963 4964 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4965 // send host num completed packets next as they don't require num_cmd_packets > 0 4966 if (!hci_can_send_comand_packet_transport()) return; 4967 if (hci_stack->host_completed_packets){ 4968 hci_host_num_completed_packets(); 4969 return; 4970 } 4971 #endif 4972 4973 if (!hci_can_send_command_packet_now()) return; 4974 4975 // global/non-connection oriented commands 4976 4977 4978 #ifdef ENABLE_CLASSIC 4979 // general gap classic 4980 done = hci_run_general_gap_classic(); 4981 if (done) return; 4982 #endif 4983 4984 #ifdef ENABLE_BLE 4985 // general gap le 4986 done = hci_run_general_gap_le(); 4987 if (done) return; 4988 #endif 4989 4990 // send pending HCI commands 4991 done = hci_run_general_pending_commands(); 4992 if (done) return; 4993 4994 // stack state sub statemachines 4995 hci_connection_t * connection; 4996 switch (hci_stack->state){ 4997 case HCI_STATE_INITIALIZING: 4998 hci_initializing_run(); 4999 break; 5000 5001 case HCI_STATE_HALTING: 5002 5003 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5004 switch (hci_stack->substate){ 5005 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5006 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5007 5008 #ifdef ENABLE_BLE 5009 #ifdef ENABLE_LE_CENTRAL 5010 // free whitelist entries 5011 { 5012 btstack_linked_list_iterator_t lit; 5013 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5014 while (btstack_linked_list_iterator_has_next(&lit)){ 5015 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5016 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5017 btstack_memory_whitelist_entry_free(entry); 5018 } 5019 } 5020 #endif 5021 #endif 5022 // close all open connections 5023 connection = (hci_connection_t *) hci_stack->connections; 5024 if (connection){ 5025 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5026 if (!hci_can_send_command_packet_now()) return; 5027 5028 // check state 5029 if (connection->state == SENT_DISCONNECT) return; 5030 connection->state = SENT_DISCONNECT; 5031 5032 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5033 5034 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5035 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5036 5037 // ... which would be ignored anyway as we shutdown (free) the connection now 5038 hci_shutdown_connection(connection); 5039 5040 // finally, send the disconnect command 5041 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5042 return; 5043 } 5044 5045 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5046 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5047 log_info("HCI_STATE_HALTING: wait 50 ms"); 5048 hci_stack->substate = HCI_HALTING_W4_TIMER; 5049 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5050 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5051 btstack_run_loop_add_timer(&hci_stack->timeout); 5052 break; 5053 } 5054 5055 /* fall through */ 5056 5057 case HCI_HALTING_CLOSE: 5058 log_info("HCI_STATE_HALTING, calling off"); 5059 5060 // switch mode 5061 hci_power_control_off(); 5062 5063 log_info("HCI_STATE_HALTING, emitting state"); 5064 hci_emit_state(); 5065 log_info("HCI_STATE_HALTING, done"); 5066 break; 5067 5068 case HCI_HALTING_W4_TIMER: 5069 // keep waiting 5070 5071 break; 5072 default: 5073 break; 5074 } 5075 5076 break; 5077 5078 case HCI_STATE_FALLING_ASLEEP: 5079 switch(hci_stack->substate) { 5080 case HCI_FALLING_ASLEEP_DISCONNECT: 5081 log_info("HCI_STATE_FALLING_ASLEEP"); 5082 // close all open connections 5083 connection = (hci_connection_t *) hci_stack->connections; 5084 if (connection){ 5085 5086 // send disconnect 5087 if (!hci_can_send_command_packet_now()) return; 5088 5089 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5090 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5091 5092 // send disconnected event right away - causes higher layer connections to get closed, too. 5093 hci_shutdown_connection(connection); 5094 return; 5095 } 5096 5097 if (hci_classic_supported()){ 5098 // disable page and inquiry scan 5099 if (!hci_can_send_command_packet_now()) return; 5100 5101 log_info("HCI_STATE_HALTING, disabling inq scans"); 5102 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5103 5104 // continue in next sub state 5105 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5106 break; 5107 } 5108 5109 /* fall through */ 5110 5111 case HCI_FALLING_ASLEEP_COMPLETE: 5112 log_info("HCI_STATE_HALTING, calling sleep"); 5113 // switch mode 5114 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5115 hci_emit_state(); 5116 break; 5117 5118 default: 5119 break; 5120 } 5121 break; 5122 5123 default: 5124 break; 5125 } 5126 } 5127 5128 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5129 // house-keeping 5130 5131 #ifdef ENABLE_CLASSIC 5132 bd_addr_t addr; 5133 hci_connection_t * conn; 5134 #endif 5135 #ifdef ENABLE_LE_CENTRAL 5136 uint8_t initiator_filter_policy; 5137 #endif 5138 5139 uint16_t opcode = little_endian_read_16(packet, 0); 5140 switch (opcode) { 5141 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5142 hci_stack->loopback_mode = packet[3]; 5143 break; 5144 5145 #ifdef ENABLE_CLASSIC 5146 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5147 reverse_bd_addr(&packet[3], addr); 5148 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5149 5150 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5151 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5152 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5153 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5154 } 5155 5156 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5157 if (!conn) { 5158 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5159 if (!conn) { 5160 // notify client that alloc failed 5161 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5162 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5163 } 5164 conn->state = SEND_CREATE_CONNECTION; 5165 conn->role = HCI_ROLE_MASTER; 5166 } 5167 5168 conn->con_handle = HCI_CON_HANDLE_INVALID; 5169 conn->role = HCI_ROLE_INVALID; 5170 5171 log_info("conn state %u", conn->state); 5172 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5173 switch (conn->state) { 5174 // if connection active exists 5175 case OPEN: 5176 // and OPEN, emit connection complete command 5177 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5178 // packet not sent to controller 5179 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5180 case RECEIVED_DISCONNECTION_COMPLETE: 5181 // create connection triggered in disconnect complete event, let's do it now 5182 break; 5183 case SEND_CREATE_CONNECTION: 5184 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5185 break; 5186 default: 5187 // otherwise, just ignore as it is already in the open process 5188 // packet not sent to controller 5189 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5190 } 5191 conn->state = SENT_CREATE_CONNECTION; 5192 5193 // track outgoing connection 5194 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5195 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5196 break; 5197 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5198 if (hci_stack->link_key_db) { 5199 reverse_bd_addr(&packet[3], addr); 5200 hci_stack->link_key_db->delete_link_key(addr); 5201 } 5202 break; 5203 5204 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5205 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5206 // setup_synchronous_connection? Voice setting at offset 22 5207 // TODO: compare to current setting if sco connection already active 5208 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5209 break; 5210 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5211 // accept_synchronus_connection? Voice setting at offset 18 5212 // TODO: compare to current setting if sco connection already active 5213 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5214 break; 5215 #endif 5216 #endif 5217 5218 #ifdef ENABLE_BLE 5219 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5220 hci_stack->le_random_address_set = 1; 5221 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5222 break; 5223 #ifdef ENABLE_LE_PERIPHERAL 5224 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5225 hci_stack->le_advertisements_active = packet[3] != 0; 5226 break; 5227 #endif 5228 #ifdef ENABLE_LE_CENTRAL 5229 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5230 // white list used? 5231 initiator_filter_policy = packet[7]; 5232 switch (initiator_filter_policy) { 5233 case 0: 5234 // whitelist not used 5235 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5236 break; 5237 case 1: 5238 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5239 break; 5240 default: 5241 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5242 break; 5243 } 5244 // track outgoing connection 5245 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5246 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5247 break; 5248 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5249 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5250 break; 5251 #endif 5252 #endif 5253 default: 5254 break; 5255 } 5256 5257 hci_stack->num_cmd_packets--; 5258 5259 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5260 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5261 if (err != 0){ 5262 return ERROR_CODE_HARDWARE_FAILURE; 5263 } 5264 return ERROR_CODE_SUCCESS; 5265 } 5266 5267 // disconnect because of security block 5268 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5269 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5270 if (!connection) return; 5271 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5272 } 5273 5274 5275 // Configure Secure Simple Pairing 5276 5277 #ifdef ENABLE_CLASSIC 5278 5279 // enable will enable SSP during init 5280 void gap_ssp_set_enable(int enable){ 5281 hci_stack->ssp_enable = enable; 5282 } 5283 5284 static int hci_local_ssp_activated(void){ 5285 return gap_ssp_supported() && hci_stack->ssp_enable; 5286 } 5287 5288 // if set, BTstack will respond to io capability request using authentication requirement 5289 void gap_ssp_set_io_capability(int io_capability){ 5290 hci_stack->ssp_io_capability = io_capability; 5291 } 5292 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5293 hci_stack->ssp_authentication_requirement = authentication_requirement; 5294 } 5295 5296 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5297 void gap_ssp_set_auto_accept(int auto_accept){ 5298 hci_stack->ssp_auto_accept = auto_accept; 5299 } 5300 5301 void gap_secure_connections_enable(bool enable){ 5302 hci_stack->secure_connections_enable = enable; 5303 } 5304 5305 #endif 5306 5307 // va_list part of hci_send_cmd 5308 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5309 if (!hci_can_send_command_packet_now()){ 5310 log_error("hci_send_cmd called but cannot send packet now"); 5311 return ERROR_CODE_COMMAND_DISALLOWED; 5312 } 5313 5314 // for HCI INITIALIZATION 5315 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5316 hci_stack->last_cmd_opcode = cmd->opcode; 5317 5318 hci_reserve_packet_buffer(); 5319 uint8_t * packet = hci_stack->hci_packet_buffer; 5320 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5321 uint8_t status = hci_send_cmd_packet(packet, size); 5322 5323 // release packet buffer on error or for synchronous transport implementations 5324 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5325 hci_release_packet_buffer(); 5326 hci_emit_transport_packet_sent(); 5327 } 5328 5329 return status; 5330 } 5331 5332 /** 5333 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5334 */ 5335 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5336 va_list argptr; 5337 va_start(argptr, cmd); 5338 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5339 va_end(argptr); 5340 return status; 5341 } 5342 5343 // Create various non-HCI events. 5344 // TODO: generalize, use table similar to hci_create_command 5345 5346 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5347 // dump packet 5348 if (dump) { 5349 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5350 } 5351 5352 // dispatch to all event handlers 5353 btstack_linked_list_iterator_t it; 5354 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5355 while (btstack_linked_list_iterator_has_next(&it)){ 5356 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5357 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5358 } 5359 } 5360 5361 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5362 if (!hci_stack->acl_packet_handler) return; 5363 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5364 } 5365 5366 #ifdef ENABLE_CLASSIC 5367 static void hci_notify_if_sco_can_send_now(void){ 5368 // notify SCO sender if waiting 5369 if (!hci_stack->sco_waiting_for_can_send_now) return; 5370 if (hci_can_send_sco_packet_now()){ 5371 hci_stack->sco_waiting_for_can_send_now = 0; 5372 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5373 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5374 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5375 } 5376 } 5377 5378 // parsing end emitting has been merged to reduce code size 5379 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5380 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5381 5382 uint8_t * eir_data; 5383 ad_context_t context; 5384 const uint8_t * name; 5385 uint8_t name_len; 5386 5387 if (size < 3) return; 5388 5389 int event_type = hci_event_packet_get_type(packet); 5390 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5391 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5392 5393 switch (event_type){ 5394 case HCI_EVENT_INQUIRY_RESULT: 5395 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5396 if (size != (3 + (num_responses * 14))) return; 5397 break; 5398 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5399 if (size != 257) return; 5400 if (num_responses != 1) return; 5401 break; 5402 default: 5403 return; 5404 } 5405 5406 // event[1] is set at the end 5407 int i; 5408 for (i=0; i<num_responses;i++){ 5409 memset(event, 0, sizeof(event)); 5410 event[0] = GAP_EVENT_INQUIRY_RESULT; 5411 uint8_t event_size = 27; // if name is not set by EIR 5412 5413 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5414 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5415 (void)memcpy(&event[9], 5416 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5417 3); // class of device 5418 (void)memcpy(&event[12], 5419 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5420 2); // clock offset 5421 5422 switch (event_type){ 5423 case HCI_EVENT_INQUIRY_RESULT: 5424 // 14,15,16,17 = 0, size 18 5425 break; 5426 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5427 event[14] = 1; 5428 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5429 // 16,17 = 0, size 18 5430 break; 5431 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5432 event[14] = 1; 5433 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5434 // EIR packets only contain a single inquiry response 5435 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5436 name = NULL; 5437 // Iterate over EIR data 5438 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5439 uint8_t data_type = ad_iterator_get_data_type(&context); 5440 uint8_t data_size = ad_iterator_get_data_len(&context); 5441 const uint8_t * data = ad_iterator_get_data(&context); 5442 // Prefer Complete Local Name over Shortened Local Name 5443 switch (data_type){ 5444 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5445 if (name) continue; 5446 /* fall through */ 5447 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5448 name = data; 5449 name_len = data_size; 5450 break; 5451 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5452 if (data_size != 8) break; 5453 event[16] = 1; 5454 memcpy(&event[17], data, 8); 5455 break; 5456 default: 5457 break; 5458 } 5459 } 5460 if (name){ 5461 event[25] = 1; 5462 // truncate name if needed 5463 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5464 event[26] = len; 5465 (void)memcpy(&event[27], name, len); 5466 event_size += len; 5467 } 5468 break; 5469 default: 5470 return; 5471 } 5472 event[1] = event_size - 2; 5473 hci_emit_event(event, event_size, 1); 5474 } 5475 } 5476 #endif 5477 5478 void hci_emit_state(void){ 5479 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5480 uint8_t event[3]; 5481 event[0] = BTSTACK_EVENT_STATE; 5482 event[1] = sizeof(event) - 2u; 5483 event[2] = hci_stack->state; 5484 hci_emit_event(event, sizeof(event), 1); 5485 } 5486 5487 #ifdef ENABLE_CLASSIC 5488 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5489 uint8_t event[13]; 5490 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5491 event[1] = sizeof(event) - 2; 5492 event[2] = status; 5493 little_endian_store_16(event, 3, con_handle); 5494 reverse_bd_addr(address, &event[5]); 5495 event[11] = 1; // ACL connection 5496 event[12] = 0; // encryption disabled 5497 hci_emit_event(event, sizeof(event), 1); 5498 } 5499 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5500 if (disable_l2cap_timeouts) return; 5501 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5502 uint8_t event[4]; 5503 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5504 event[1] = sizeof(event) - 2; 5505 little_endian_store_16(event, 2, conn->con_handle); 5506 hci_emit_event(event, sizeof(event), 1); 5507 } 5508 #endif 5509 5510 #ifdef ENABLE_BLE 5511 #ifdef ENABLE_LE_CENTRAL 5512 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){ 5513 uint8_t event[21]; 5514 event[0] = HCI_EVENT_LE_META; 5515 event[1] = sizeof(event) - 2u; 5516 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5517 event[3] = status; 5518 little_endian_store_16(event, 4, con_handle); 5519 event[6] = 0; // TODO: role 5520 event[7] = address_type; 5521 reverse_bd_addr(address, &event[8]); 5522 little_endian_store_16(event, 14, 0); // interval 5523 little_endian_store_16(event, 16, 0); // latency 5524 little_endian_store_16(event, 18, 0); // supervision timeout 5525 event[20] = 0; // master clock accuracy 5526 hci_emit_event(event, sizeof(event), 1); 5527 } 5528 #endif 5529 #endif 5530 5531 static void hci_emit_transport_packet_sent(void){ 5532 // notify upper stack that it might be possible to send again 5533 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5534 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5535 } 5536 5537 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5538 uint8_t event[6]; 5539 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5540 event[1] = sizeof(event) - 2u; 5541 event[2] = 0; // status = OK 5542 little_endian_store_16(event, 3, con_handle); 5543 event[5] = reason; 5544 hci_emit_event(event, sizeof(event), 1); 5545 } 5546 5547 static void hci_emit_nr_connections_changed(void){ 5548 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5549 uint8_t event[3]; 5550 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5551 event[1] = sizeof(event) - 2u; 5552 event[2] = nr_hci_connections(); 5553 hci_emit_event(event, sizeof(event), 1); 5554 } 5555 5556 static void hci_emit_hci_open_failed(void){ 5557 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5558 uint8_t event[2]; 5559 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5560 event[1] = sizeof(event) - 2u; 5561 hci_emit_event(event, sizeof(event), 1); 5562 } 5563 5564 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5565 log_info("hci_emit_dedicated_bonding_result %u ", status); 5566 uint8_t event[9]; 5567 int pos = 0; 5568 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5569 event[pos++] = sizeof(event) - 2u; 5570 event[pos++] = status; 5571 reverse_bd_addr(address, &event[pos]); 5572 hci_emit_event(event, sizeof(event), 1); 5573 } 5574 5575 5576 #ifdef ENABLE_CLASSIC 5577 5578 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5579 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5580 uint8_t event[5]; 5581 int pos = 0; 5582 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5583 event[pos++] = sizeof(event) - 2; 5584 little_endian_store_16(event, 2, con_handle); 5585 pos += 2; 5586 event[pos++] = level; 5587 hci_emit_event(event, sizeof(event), 1); 5588 } 5589 5590 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5591 if (!connection) return LEVEL_0; 5592 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5593 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5594 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5595 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5596 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5597 // LEVEL 4 always requires 128 bit encrytion key size 5598 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5599 security_level = LEVEL_3; 5600 } 5601 return security_level; 5602 } 5603 5604 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5605 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5606 uint8_t event[3]; 5607 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5608 event[1] = sizeof(event) - 2; 5609 event[2] = enabled; 5610 hci_emit_event(event, sizeof(event), 1); 5611 } 5612 5613 // query if remote side supports eSCO 5614 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5615 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5616 if (!connection) return false; 5617 return (connection->remote_supported_features[0] & 1) != 0; 5618 } 5619 5620 static bool hci_ssp_supported(hci_connection_t * connection){ 5621 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5622 return (connection->bonding_flags & mask) == mask; 5623 } 5624 5625 // query if remote side supports SSP 5626 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5627 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5628 if (!connection) return false; 5629 return hci_ssp_supported(connection) ? 1 : 0; 5630 } 5631 5632 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5633 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5634 } 5635 5636 // GAP API 5637 /** 5638 * @bbrief enable/disable bonding. default is enabled 5639 * @praram enabled 5640 */ 5641 void gap_set_bondable_mode(int enable){ 5642 hci_stack->bondable = enable ? 1 : 0; 5643 } 5644 /** 5645 * @brief Get bondable mode. 5646 * @return 1 if bondable 5647 */ 5648 int gap_get_bondable_mode(void){ 5649 return hci_stack->bondable; 5650 } 5651 5652 /** 5653 * @brief map link keys to security levels 5654 */ 5655 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5656 switch (link_key_type){ 5657 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5658 return LEVEL_4; 5659 case COMBINATION_KEY: 5660 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5661 return LEVEL_3; 5662 default: 5663 return LEVEL_2; 5664 } 5665 } 5666 5667 /** 5668 * @brief map link keys to secure connection yes/no 5669 */ 5670 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5671 switch (link_key_type){ 5672 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5673 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5674 return 1; 5675 default: 5676 return 0; 5677 } 5678 } 5679 5680 /** 5681 * @brief map link keys to authenticated 5682 */ 5683 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5684 switch (link_key_type){ 5685 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5686 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5687 return 1; 5688 default: 5689 return 0; 5690 } 5691 } 5692 5693 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5694 log_info("gap_mitm_protection_required_for_security_level %u", level); 5695 return level > LEVEL_2; 5696 } 5697 5698 /** 5699 * @brief get current security level 5700 */ 5701 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5702 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5703 if (!connection) return LEVEL_0; 5704 return gap_security_level_for_connection(connection); 5705 } 5706 5707 /** 5708 * @brief request connection to device to 5709 * @result GAP_AUTHENTICATION_RESULT 5710 */ 5711 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5712 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5713 if (!connection){ 5714 hci_emit_security_level(con_handle, LEVEL_0); 5715 return; 5716 } 5717 5718 btstack_assert(hci_is_le_connection(connection) == false); 5719 5720 // 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) 5721 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5722 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5723 requested_level = LEVEL_4; 5724 } 5725 5726 gap_security_level_t current_level = gap_security_level(con_handle); 5727 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5728 requested_level, connection->requested_security_level, current_level); 5729 5730 // authentication active if authentication request was sent or planned level > 0 5731 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5732 if (authentication_active){ 5733 // authentication already active 5734 if (connection->requested_security_level < requested_level){ 5735 // increase requested level as new level is higher 5736 // TODO: handle re-authentication when done 5737 connection->requested_security_level = requested_level; 5738 } 5739 } else { 5740 // no request active, notify if security sufficient 5741 if (requested_level <= current_level){ 5742 hci_emit_security_level(con_handle, current_level); 5743 return; 5744 } 5745 5746 // store request 5747 connection->requested_security_level = requested_level; 5748 5749 // start to authenticate connection 5750 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5751 hci_run(); 5752 } 5753 } 5754 5755 /** 5756 * @brief start dedicated bonding with device. disconnect after bonding 5757 * @param device 5758 * @param request MITM protection 5759 * @result GAP_DEDICATED_BONDING_COMPLETE 5760 */ 5761 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5762 5763 // create connection state machine 5764 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5765 5766 if (!connection){ 5767 return BTSTACK_MEMORY_ALLOC_FAILED; 5768 } 5769 5770 // delete linkn key 5771 gap_drop_link_key_for_bd_addr(device); 5772 5773 // configure LEVEL_2/3, dedicated bonding 5774 connection->state = SEND_CREATE_CONNECTION; 5775 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5776 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5777 connection->bonding_flags = BONDING_DEDICATED; 5778 5779 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5780 5781 // handle: connnection failure (connection complete != ok) 5782 // handle: authentication failure 5783 // handle: disconnect on done 5784 5785 hci_run(); 5786 5787 return 0; 5788 } 5789 5790 void gap_set_local_name(const char * local_name){ 5791 hci_stack->local_name = local_name; 5792 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5793 // also update EIR if not set by user 5794 if (hci_stack->eir_data == NULL){ 5795 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5796 } 5797 hci_run(); 5798 } 5799 #endif 5800 5801 5802 #ifdef ENABLE_BLE 5803 5804 #ifdef ENABLE_LE_CENTRAL 5805 void gap_start_scan(void){ 5806 hci_stack->le_scanning_enabled = true; 5807 hci_run(); 5808 } 5809 5810 void gap_stop_scan(void){ 5811 hci_stack->le_scanning_enabled = false; 5812 hci_run(); 5813 } 5814 5815 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5816 hci_stack->le_scan_type = scan_type; 5817 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5818 hci_stack->le_scan_interval = scan_interval; 5819 hci_stack->le_scan_window = scan_window; 5820 hci_stack->le_scanning_param_update = true; 5821 hci_run(); 5822 } 5823 5824 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5825 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5826 } 5827 5828 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5829 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5830 if (!conn){ 5831 // disallow if le connection is already outgoing 5832 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5833 log_error("le connection already active"); 5834 return ERROR_CODE_COMMAND_DISALLOWED; 5835 } 5836 5837 log_info("gap_connect: no connection exists yet, creating context"); 5838 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5839 if (!conn){ 5840 // notify client that alloc failed 5841 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5842 log_info("gap_connect: failed to alloc hci_connection_t"); 5843 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5844 } 5845 5846 // set le connecting state 5847 if (hci_is_le_connection_type(addr_type)){ 5848 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5849 } 5850 5851 conn->state = SEND_CREATE_CONNECTION; 5852 log_info("gap_connect: send create connection next"); 5853 hci_run(); 5854 return ERROR_CODE_SUCCESS; 5855 } 5856 5857 if (!hci_is_le_connection(conn) || 5858 (conn->state == SEND_CREATE_CONNECTION) || 5859 (conn->state == SENT_CREATE_CONNECTION)) { 5860 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5861 log_error("gap_connect: classic connection or connect is already being created"); 5862 return GATT_CLIENT_IN_WRONG_STATE; 5863 } 5864 5865 // check if connection was just disconnected 5866 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5867 log_info("gap_connect: send create connection (again)"); 5868 conn->state = SEND_CREATE_CONNECTION; 5869 hci_run(); 5870 return ERROR_CODE_SUCCESS; 5871 } 5872 5873 log_info("gap_connect: context exists with state %u", conn->state); 5874 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5875 hci_run(); 5876 return ERROR_CODE_SUCCESS; 5877 } 5878 5879 // @assumption: only a single outgoing LE Connection exists 5880 static hci_connection_t * gap_get_outgoing_connection(void){ 5881 btstack_linked_item_t *it; 5882 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5883 hci_connection_t * conn = (hci_connection_t *) it; 5884 if (!hci_is_le_connection(conn)) continue; 5885 switch (conn->state){ 5886 case SEND_CREATE_CONNECTION: 5887 case SENT_CREATE_CONNECTION: 5888 case SENT_CANCEL_CONNECTION: 5889 return conn; 5890 default: 5891 break; 5892 }; 5893 } 5894 return NULL; 5895 } 5896 5897 uint8_t gap_connect_cancel(void){ 5898 hci_connection_t * conn = gap_get_outgoing_connection(); 5899 if (!conn) return 0; 5900 switch (conn->state){ 5901 case SEND_CREATE_CONNECTION: 5902 // skip sending create connection and emit event instead 5903 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5904 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5905 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5906 btstack_memory_hci_connection_free( conn ); 5907 break; 5908 case SENT_CREATE_CONNECTION: 5909 // request to send cancel connection 5910 conn->state = SEND_CANCEL_CONNECTION; 5911 hci_run(); 5912 break; 5913 default: 5914 break; 5915 } 5916 return 0; 5917 } 5918 #endif 5919 5920 #ifdef ENABLE_LE_CENTRAL 5921 /** 5922 * @brief Set connection parameters for outgoing connections 5923 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5924 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5925 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5926 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5927 * @param conn_latency, default: 4 5928 * @param supervision_timeout (unit: 10ms), default: 720 ms 5929 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5930 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5931 */ 5932 5933 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5934 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5935 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5936 hci_stack->le_connection_scan_interval = conn_scan_interval; 5937 hci_stack->le_connection_scan_window = conn_scan_window; 5938 hci_stack->le_connection_interval_min = conn_interval_min; 5939 hci_stack->le_connection_interval_max = conn_interval_max; 5940 hci_stack->le_connection_latency = conn_latency; 5941 hci_stack->le_supervision_timeout = supervision_timeout; 5942 hci_stack->le_minimum_ce_length = min_ce_length; 5943 hci_stack->le_maximum_ce_length = max_ce_length; 5944 } 5945 #endif 5946 5947 /** 5948 * @brief Updates the connection parameters for a given LE connection 5949 * @param handle 5950 * @param conn_interval_min (unit: 1.25ms) 5951 * @param conn_interval_max (unit: 1.25ms) 5952 * @param conn_latency 5953 * @param supervision_timeout (unit: 10ms) 5954 * @returns 0 if ok 5955 */ 5956 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5957 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5958 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5959 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5960 connection->le_conn_interval_min = conn_interval_min; 5961 connection->le_conn_interval_max = conn_interval_max; 5962 connection->le_conn_latency = conn_latency; 5963 connection->le_supervision_timeout = supervision_timeout; 5964 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5965 hci_run(); 5966 return 0; 5967 } 5968 5969 /** 5970 * @brief Request an update of the connection parameter for a given LE connection 5971 * @param handle 5972 * @param conn_interval_min (unit: 1.25ms) 5973 * @param conn_interval_max (unit: 1.25ms) 5974 * @param conn_latency 5975 * @param supervision_timeout (unit: 10ms) 5976 * @returns 0 if ok 5977 */ 5978 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5979 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5980 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5981 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5982 connection->le_conn_interval_min = conn_interval_min; 5983 connection->le_conn_interval_max = conn_interval_max; 5984 connection->le_conn_latency = conn_latency; 5985 connection->le_supervision_timeout = supervision_timeout; 5986 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5987 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5988 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5989 return 0; 5990 } 5991 5992 #ifdef ENABLE_LE_PERIPHERAL 5993 5994 /** 5995 * @brief Set Advertisement Data 5996 * @param advertising_data_length 5997 * @param advertising_data (max 31 octets) 5998 * @note data is not copied, pointer has to stay valid 5999 */ 6000 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6001 hci_stack->le_advertisements_data_len = advertising_data_length; 6002 hci_stack->le_advertisements_data = advertising_data; 6003 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6004 hci_run(); 6005 } 6006 6007 /** 6008 * @brief Set Scan Response Data 6009 * @param advertising_data_length 6010 * @param advertising_data (max 31 octets) 6011 * @note data is not copied, pointer has to stay valid 6012 */ 6013 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6014 hci_stack->le_scan_response_data_len = scan_response_data_length; 6015 hci_stack->le_scan_response_data = scan_response_data; 6016 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6017 hci_run(); 6018 } 6019 6020 /** 6021 * @brief Set Advertisement Parameters 6022 * @param adv_int_min 6023 * @param adv_int_max 6024 * @param adv_type 6025 * @param direct_address_type 6026 * @param direct_address 6027 * @param channel_map 6028 * @param filter_policy 6029 * 6030 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6031 */ 6032 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6033 uint8_t direct_address_typ, bd_addr_t direct_address, 6034 uint8_t channel_map, uint8_t filter_policy) { 6035 6036 hci_stack->le_advertisements_interval_min = adv_int_min; 6037 hci_stack->le_advertisements_interval_max = adv_int_max; 6038 hci_stack->le_advertisements_type = adv_type; 6039 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6040 hci_stack->le_advertisements_channel_map = channel_map; 6041 hci_stack->le_advertisements_filter_policy = filter_policy; 6042 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6043 6); 6044 6045 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6046 hci_run(); 6047 } 6048 6049 /** 6050 * @brief Enable/Disable Advertisements 6051 * @param enabled 6052 */ 6053 void gap_advertisements_enable(int enabled){ 6054 hci_stack->le_advertisements_enabled = enabled != 0; 6055 hci_update_advertisements_enabled_for_current_roles(); 6056 hci_run(); 6057 } 6058 6059 #endif 6060 6061 void hci_le_set_own_address_type(uint8_t own_address_type){ 6062 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6063 if (own_address_type == hci_stack->le_own_addr_type) return; 6064 hci_stack->le_own_addr_type = own_address_type; 6065 6066 #ifdef ENABLE_LE_PERIPHERAL 6067 // update advertisement parameters, too 6068 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6069 hci_run(); 6070 #endif 6071 #ifdef ENABLE_LE_CENTRAL 6072 // note: we don't update scan parameters or modify ongoing connection attempts 6073 #endif 6074 } 6075 6076 #endif 6077 6078 uint8_t gap_disconnect(hci_con_handle_t handle){ 6079 hci_connection_t * conn = hci_connection_for_handle(handle); 6080 if (!conn){ 6081 hci_emit_disconnection_complete(handle, 0); 6082 return 0; 6083 } 6084 // ignore if already disconnected 6085 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6086 return 0; 6087 } 6088 conn->state = SEND_DISCONNECT; 6089 hci_run(); 6090 return 0; 6091 } 6092 6093 int gap_read_rssi(hci_con_handle_t con_handle){ 6094 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6095 if (hci_connection == NULL) return 0; 6096 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6097 hci_run(); 6098 return 1; 6099 } 6100 6101 /** 6102 * @brief Get connection type 6103 * @param con_handle 6104 * @result connection_type 6105 */ 6106 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6107 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6108 if (!conn) return GAP_CONNECTION_INVALID; 6109 switch (conn->address_type){ 6110 case BD_ADDR_TYPE_LE_PUBLIC: 6111 case BD_ADDR_TYPE_LE_RANDOM: 6112 return GAP_CONNECTION_LE; 6113 case BD_ADDR_TYPE_SCO: 6114 return GAP_CONNECTION_SCO; 6115 case BD_ADDR_TYPE_ACL: 6116 return GAP_CONNECTION_ACL; 6117 default: 6118 return GAP_CONNECTION_INVALID; 6119 } 6120 } 6121 6122 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6123 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6124 if (!conn) return HCI_ROLE_INVALID; 6125 return (hci_role_t) conn->role; 6126 } 6127 6128 6129 #ifdef ENABLE_CLASSIC 6130 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6131 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6132 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6133 conn->request_role = role; 6134 hci_run(); 6135 return ERROR_CODE_SUCCESS; 6136 } 6137 #endif 6138 6139 #ifdef ENABLE_BLE 6140 6141 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){ 6142 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6143 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6144 6145 conn->le_phy_update_all_phys = all_phys; 6146 conn->le_phy_update_tx_phys = tx_phys; 6147 conn->le_phy_update_rx_phys = rx_phys; 6148 conn->le_phy_update_phy_options = phy_options; 6149 6150 hci_run(); 6151 6152 return 0; 6153 } 6154 6155 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6156 // check if already in list 6157 btstack_linked_list_iterator_t it; 6158 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6159 while (btstack_linked_list_iterator_has_next(&it)) { 6160 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6161 if (entry->address_type != address_type) { 6162 continue; 6163 } 6164 if (memcmp(entry->address, address, 6) != 0) { 6165 continue; 6166 } 6167 // disallow if already scheduled to add 6168 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6169 return ERROR_CODE_COMMAND_DISALLOWED; 6170 } 6171 // still on controller, but scheduled to remove -> re-add 6172 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6173 return ERROR_CODE_SUCCESS; 6174 } 6175 // alloc and add to list 6176 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6177 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6178 entry->address_type = address_type; 6179 (void)memcpy(entry->address, address, 6); 6180 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6181 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6182 return ERROR_CODE_SUCCESS; 6183 } 6184 6185 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6186 btstack_linked_list_iterator_t it; 6187 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6188 while (btstack_linked_list_iterator_has_next(&it)){ 6189 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6190 if (entry->address_type != address_type) { 6191 continue; 6192 } 6193 if (memcmp(entry->address, address, 6) != 0) { 6194 continue; 6195 } 6196 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6197 // remove from controller if already present 6198 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6199 } else { 6200 // directly remove entry from whitelist 6201 btstack_linked_list_iterator_remove(&it); 6202 btstack_memory_whitelist_entry_free(entry); 6203 } 6204 return ERROR_CODE_SUCCESS; 6205 } 6206 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6207 } 6208 6209 static void hci_whitelist_clear(void){ 6210 btstack_linked_list_iterator_t it; 6211 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6212 while (btstack_linked_list_iterator_has_next(&it)){ 6213 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6214 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6215 // remove from controller if already present 6216 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6217 continue; 6218 } 6219 // directly remove entry from whitelist 6220 btstack_linked_list_iterator_remove(&it); 6221 btstack_memory_whitelist_entry_free(entry); 6222 } 6223 } 6224 6225 /** 6226 * @brief Clear Whitelist 6227 * @returns 0 if ok 6228 */ 6229 uint8_t gap_whitelist_clear(void){ 6230 hci_whitelist_clear(); 6231 hci_run(); 6232 return ERROR_CODE_SUCCESS; 6233 } 6234 6235 /** 6236 * @brief Add Device to Whitelist 6237 * @param address_typ 6238 * @param address 6239 * @returns 0 if ok 6240 */ 6241 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6242 uint8_t status = hci_whitelist_add(address_type, address); 6243 if (status){ 6244 return status; 6245 } 6246 hci_run(); 6247 return ERROR_CODE_SUCCESS; 6248 } 6249 6250 /** 6251 * @brief Remove Device from Whitelist 6252 * @param address_typ 6253 * @param address 6254 * @returns 0 if ok 6255 */ 6256 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6257 uint8_t status = hci_whitelist_remove(address_type, address); 6258 if (status){ 6259 return status; 6260 } 6261 hci_run(); 6262 return ERROR_CODE_SUCCESS; 6263 } 6264 6265 #ifdef ENABLE_LE_CENTRAL 6266 /** 6267 * @brief Connect with Whitelist 6268 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6269 * @returns - if ok 6270 */ 6271 uint8_t gap_connect_with_whitelist(void){ 6272 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6273 return ERROR_CODE_COMMAND_DISALLOWED; 6274 } 6275 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6276 hci_run(); 6277 return ERROR_CODE_SUCCESS; 6278 } 6279 6280 /** 6281 * @brief Auto Connection Establishment - Start Connecting to device 6282 * @param address_typ 6283 * @param address 6284 * @returns 0 if ok 6285 */ 6286 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6287 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6288 return ERROR_CODE_COMMAND_DISALLOWED; 6289 } 6290 6291 uint8_t status = hci_whitelist_add(address_type, address); 6292 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6293 return status; 6294 } 6295 6296 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6297 6298 hci_run(); 6299 return ERROR_CODE_SUCCESS; 6300 } 6301 6302 /** 6303 * @brief Auto Connection Establishment - Stop Connecting to device 6304 * @param address_typ 6305 * @param address 6306 * @returns 0 if ok 6307 */ 6308 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6309 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6310 return ERROR_CODE_COMMAND_DISALLOWED; 6311 } 6312 6313 hci_whitelist_remove(address_type, address); 6314 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6315 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6316 } 6317 hci_run(); 6318 return 0; 6319 } 6320 6321 /** 6322 * @brief Auto Connection Establishment - Stop everything 6323 * @note Convenience function to stop all active auto connection attempts 6324 */ 6325 uint8_t gap_auto_connection_stop_all(void){ 6326 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6327 return ERROR_CODE_COMMAND_DISALLOWED; 6328 } 6329 hci_whitelist_clear(); 6330 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6331 hci_run(); 6332 return ERROR_CODE_SUCCESS; 6333 } 6334 6335 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6336 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6337 if (!conn) return 0; 6338 return conn->le_connection_interval; 6339 } 6340 #endif 6341 #endif 6342 6343 #ifdef ENABLE_CLASSIC 6344 /** 6345 * @brief Set Extended Inquiry Response data 6346 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6347 * @note has to be done before stack starts up 6348 */ 6349 void gap_set_extended_inquiry_response(const uint8_t * data){ 6350 hci_stack->eir_data = data; 6351 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6352 hci_run(); 6353 } 6354 6355 /** 6356 * @brief Start GAP Classic Inquiry 6357 * @param duration in 1.28s units 6358 * @return 0 if ok 6359 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6360 */ 6361 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6362 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6363 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6364 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6365 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6366 } 6367 hci_stack->inquiry_state = duration_in_1280ms_units; 6368 hci_run(); 6369 return 0; 6370 } 6371 6372 /** 6373 * @brief Stop GAP Classic Inquiry 6374 * @returns 0 if ok 6375 */ 6376 int gap_inquiry_stop(void){ 6377 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6378 // emit inquiry complete event, before it even started 6379 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6380 hci_emit_event(event, sizeof(event), 1); 6381 return 0; 6382 } 6383 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6384 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6385 hci_run(); 6386 return 0; 6387 } 6388 6389 void gap_inquiry_set_lap(uint32_t lap){ 6390 hci_stack->inquiry_lap = lap; 6391 } 6392 6393 6394 /** 6395 * @brief Remote Name Request 6396 * @param addr 6397 * @param page_scan_repetition_mode 6398 * @param clock_offset only used when bit 15 is set 6399 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6400 */ 6401 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6402 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6403 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6404 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6405 hci_stack->remote_name_clock_offset = clock_offset; 6406 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6407 hci_run(); 6408 return 0; 6409 } 6410 6411 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6412 hci_stack->gap_pairing_state = state; 6413 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6414 hci_run(); 6415 return 0; 6416 } 6417 6418 /** 6419 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6420 * @param addr 6421 * @param pin_data 6422 * @param pin_len 6423 * @return 0 if ok 6424 */ 6425 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6426 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6427 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6428 hci_stack->gap_pairing_pin_len = pin_len; 6429 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6430 } 6431 6432 /** 6433 * @brief Legacy Pairing Pin Code Response 6434 * @param addr 6435 * @param pin 6436 * @return 0 if ok 6437 */ 6438 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6439 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6440 } 6441 6442 /** 6443 * @brief Abort Legacy Pairing 6444 * @param addr 6445 * @param pin 6446 * @return 0 if ok 6447 */ 6448 int gap_pin_code_negative(bd_addr_t addr){ 6449 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6450 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6451 } 6452 6453 /** 6454 * @brief SSP Passkey Response 6455 * @param addr 6456 * @param passkey 6457 * @return 0 if ok 6458 */ 6459 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6460 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6461 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6462 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6463 } 6464 6465 /** 6466 * @brief Abort SSP Passkey Entry/Pairing 6467 * @param addr 6468 * @param pin 6469 * @return 0 if ok 6470 */ 6471 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6472 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6473 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6474 } 6475 6476 /** 6477 * @brief Accept SSP Numeric Comparison 6478 * @param addr 6479 * @param passkey 6480 * @return 0 if ok 6481 */ 6482 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6483 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6484 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6485 } 6486 6487 /** 6488 * @brief Abort SSP Numeric Comparison/Pairing 6489 * @param addr 6490 * @param pin 6491 * @return 0 if ok 6492 */ 6493 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6494 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6495 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6496 } 6497 6498 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6499 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6500 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6501 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6502 connectionSetAuthenticationFlags(conn, flag); 6503 hci_run(); 6504 return ERROR_CODE_SUCCESS; 6505 } 6506 #endif 6507 6508 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6509 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6510 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6511 } 6512 6513 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6514 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6515 } 6516 #endif 6517 6518 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6519 /** 6520 * @brief Report Remote OOB Data 6521 * @param bd_addr 6522 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6523 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6524 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6525 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6526 */ 6527 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){ 6528 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6529 if (connection == NULL) { 6530 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6531 } 6532 connection->classic_oob_c_192 = c_192; 6533 connection->classic_oob_r_192 = r_192; 6534 6535 // ignore P-256 if not supported by us 6536 if (hci_stack->secure_connections_active){ 6537 connection->classic_oob_c_256 = c_256; 6538 connection->classic_oob_r_256 = r_256; 6539 } 6540 6541 return ERROR_CODE_SUCCESS; 6542 } 6543 /** 6544 * @brief Generate new OOB data 6545 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6546 */ 6547 void gap_ssp_generate_oob_data(void){ 6548 hci_stack->classic_read_local_oob_data = true; 6549 hci_run(); 6550 } 6551 6552 #endif 6553 6554 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6555 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6556 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6557 if (connection == NULL) { 6558 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6559 } 6560 6561 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6562 connection->link_key_type = type; 6563 6564 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6565 } 6566 6567 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6568 /** 6569 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6570 * @param inquiry_mode see bluetooth_defines.h 6571 */ 6572 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6573 hci_stack->inquiry_mode = inquiry_mode; 6574 } 6575 6576 /** 6577 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6578 */ 6579 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6580 hci_stack->sco_voice_setting = voice_setting; 6581 } 6582 6583 /** 6584 * @brief Get SCO Voice Setting 6585 * @return current voice setting 6586 */ 6587 uint16_t hci_get_sco_voice_setting(void){ 6588 return hci_stack->sco_voice_setting; 6589 } 6590 6591 static int hci_have_usb_transport(void){ 6592 if (!hci_stack->hci_transport) return 0; 6593 const char * transport_name = hci_stack->hci_transport->name; 6594 if (!transport_name) return 0; 6595 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6596 } 6597 6598 /** @brief Get SCO packet length for current SCO Voice setting 6599 * @note Using SCO packets of the exact length is required for USB transfer 6600 * @return Length of SCO packets in bytes (not audio frames) 6601 */ 6602 uint16_t hci_get_sco_packet_length(void){ 6603 uint16_t sco_packet_length = 0; 6604 6605 #ifdef ENABLE_SCO_OVER_HCI 6606 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6607 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6608 6609 if (hci_have_usb_transport()){ 6610 // see Core Spec for H2 USB Transfer. 6611 // 3 byte SCO header + 24 bytes per connection 6612 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6613 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6614 } else { 6615 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6616 sco_packet_length = 3 + 60 * multiplier; 6617 // assert that it still fits inside an SCO buffer 6618 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6619 sco_packet_length = 3 + 60; 6620 } 6621 } 6622 #endif 6623 6624 #ifdef HAVE_SCO_TRANSPORT 6625 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6626 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6627 sco_packet_length = 3 + 60 * multiplier; 6628 #endif 6629 return sco_packet_length; 6630 } 6631 6632 /** 6633 * @brief Sets the master/slave policy 6634 * @param policy (0: attempt to become master, 1: let connecting device decide) 6635 */ 6636 void hci_set_master_slave_policy(uint8_t policy){ 6637 hci_stack->master_slave_policy = policy; 6638 } 6639 6640 #endif 6641 6642 HCI_STATE hci_get_state(void){ 6643 return hci_stack->state; 6644 } 6645 6646 #ifdef ENABLE_CLASSIC 6647 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6648 hci_stack->gap_classic_accept_callback = accept_callback; 6649 } 6650 #endif 6651 6652 /** 6653 * @brief Set callback for Bluetooth Hardware Error 6654 */ 6655 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6656 hci_stack->hardware_error_callback = fn; 6657 } 6658 6659 void hci_disconnect_all(void){ 6660 btstack_linked_list_iterator_t it; 6661 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6662 while (btstack_linked_list_iterator_has_next(&it)){ 6663 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6664 if (con->state == SENT_DISCONNECT) continue; 6665 con->state = SEND_DISCONNECT; 6666 } 6667 hci_run(); 6668 } 6669 6670 uint16_t hci_get_manufacturer(void){ 6671 return hci_stack->manufacturer; 6672 } 6673 6674 #ifdef ENABLE_BLE 6675 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6676 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6677 if (!hci_con) return NULL; 6678 return &hci_con->sm_connection; 6679 } 6680 6681 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6682 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6683 #endif 6684 6685 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6686 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6687 if (hci_connection == NULL) return 0; 6688 if (hci_is_le_connection(hci_connection)){ 6689 #ifdef ENABLE_BLE 6690 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6691 if (sm_conn->sm_connection_encrypted) { 6692 return sm_conn->sm_actual_encryption_key_size; 6693 } 6694 #endif 6695 } else { 6696 #ifdef ENABLE_CLASSIC 6697 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6698 return hci_connection->encryption_key_size; 6699 } 6700 #endif 6701 } 6702 return 0; 6703 } 6704 6705 int gap_authenticated(hci_con_handle_t con_handle){ 6706 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6707 if (hci_connection == NULL) return 0; 6708 6709 switch (hci_connection->address_type){ 6710 #ifdef ENABLE_BLE 6711 case BD_ADDR_TYPE_LE_PUBLIC: 6712 case BD_ADDR_TYPE_LE_RANDOM: 6713 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6714 return hci_connection->sm_connection.sm_connection_authenticated; 6715 #endif 6716 #ifdef ENABLE_CLASSIC 6717 case BD_ADDR_TYPE_SCO: 6718 case BD_ADDR_TYPE_ACL: 6719 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6720 #endif 6721 default: 6722 return 0; 6723 } 6724 } 6725 6726 int gap_secure_connection(hci_con_handle_t con_handle){ 6727 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6728 if (hci_connection == NULL) return 0; 6729 6730 switch (hci_connection->address_type){ 6731 #ifdef ENABLE_BLE 6732 case BD_ADDR_TYPE_LE_PUBLIC: 6733 case BD_ADDR_TYPE_LE_RANDOM: 6734 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6735 return hci_connection->sm_connection.sm_connection_sc; 6736 #endif 6737 #ifdef ENABLE_CLASSIC 6738 case BD_ADDR_TYPE_SCO: 6739 case BD_ADDR_TYPE_ACL: 6740 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6741 #endif 6742 default: 6743 return 0; 6744 } 6745 } 6746 6747 bool gap_bonded(hci_con_handle_t con_handle){ 6748 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6749 if (hci_connection == NULL) return 0; 6750 6751 #ifdef ENABLE_CLASSIC 6752 link_key_t link_key; 6753 link_key_type_t link_key_type; 6754 #endif 6755 switch (hci_connection->address_type){ 6756 #ifdef ENABLE_BLE 6757 case BD_ADDR_TYPE_LE_PUBLIC: 6758 case BD_ADDR_TYPE_LE_RANDOM: 6759 return hci_connection->sm_connection.sm_le_db_index >= 0; 6760 #endif 6761 #ifdef ENABLE_CLASSIC 6762 case BD_ADDR_TYPE_SCO: 6763 case BD_ADDR_TYPE_ACL: 6764 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6765 #endif 6766 default: 6767 return false; 6768 } 6769 } 6770 6771 #ifdef ENABLE_BLE 6772 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6773 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6774 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6775 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6776 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6777 return sm_conn->sm_connection_authorization_state; 6778 } 6779 #endif 6780 6781 #ifdef ENABLE_CLASSIC 6782 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){ 6783 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6784 if (!conn) return GAP_CONNECTION_INVALID; 6785 conn->sniff_min_interval = sniff_min_interval; 6786 conn->sniff_max_interval = sniff_max_interval; 6787 conn->sniff_attempt = sniff_attempt; 6788 conn->sniff_timeout = sniff_timeout; 6789 hci_run(); 6790 return 0; 6791 } 6792 6793 /** 6794 * @brief Exit Sniff mode 6795 * @param con_handle 6796 @ @return 0 if ok 6797 */ 6798 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6799 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6800 if (!conn) return GAP_CONNECTION_INVALID; 6801 conn->sniff_min_interval = 0xffff; 6802 hci_run(); 6803 return 0; 6804 } 6805 6806 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){ 6807 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6808 if (!conn) return GAP_CONNECTION_INVALID; 6809 conn->sniff_subrating_max_latency = max_latency; 6810 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6811 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6812 hci_run(); 6813 return ERROR_CODE_SUCCESS; 6814 } 6815 6816 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){ 6817 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6818 if (!conn) return GAP_CONNECTION_INVALID; 6819 conn->qos_service_type = service_type; 6820 conn->qos_token_rate = token_rate; 6821 conn->qos_peak_bandwidth = peak_bandwidth; 6822 conn->qos_latency = latency; 6823 conn->qos_delay_variation = delay_variation; 6824 hci_run(); 6825 return ERROR_CODE_SUCCESS; 6826 } 6827 6828 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6829 hci_stack->new_page_scan_interval = page_scan_interval; 6830 hci_stack->new_page_scan_window = page_scan_window; 6831 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6832 hci_run(); 6833 } 6834 6835 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6836 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6837 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6838 hci_run(); 6839 } 6840 6841 #endif 6842 6843 void hci_halting_defer(void){ 6844 if (hci_stack->state != HCI_STATE_HALTING) return; 6845 switch (hci_stack->substate){ 6846 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6847 case HCI_HALTING_CLOSE: 6848 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6849 break; 6850 default: 6851 break; 6852 } 6853 } 6854 6855 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6856 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6857 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6858 if (le_device_db_index >= le_device_db_max_count()) return; 6859 uint8_t offset = le_device_db_index >> 3; 6860 uint8_t mask = 1 << (le_device_db_index & 7); 6861 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6862 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6863 // note: go back to remove entries, otherwise, a remove + add will skip the add 6864 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6865 } 6866 } 6867 6868 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6869 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6870 if (le_device_db_index >= le_device_db_max_count()) return; 6871 uint8_t offset = le_device_db_index >> 3; 6872 uint8_t mask = 1 << (le_device_db_index & 7); 6873 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6874 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6875 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6876 } 6877 } 6878 6879 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6880 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6881 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6882 } 6883 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6884 // restart le resolving list update 6885 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6886 } 6887 return ERROR_CODE_SUCCESS; 6888 } 6889 #endif 6890 6891 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6892 void hci_setup_test_connections_fuzz(void){ 6893 hci_connection_t * conn; 6894 6895 // default address: 66:55:44:33:00:01 6896 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6897 6898 // setup Controller info 6899 hci_stack->num_cmd_packets = 255; 6900 hci_stack->acl_packets_total_num = 255; 6901 6902 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6903 addr[5] = 0x01; 6904 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6905 conn->con_handle = addr[5]; 6906 conn->role = HCI_ROLE_SLAVE; 6907 conn->state = RECEIVED_CONNECTION_REQUEST; 6908 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6909 6910 // setup incoming Classic SCO connection with con handle 0x0002 6911 addr[5] = 0x02; 6912 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6913 conn->con_handle = addr[5]; 6914 conn->role = HCI_ROLE_SLAVE; 6915 conn->state = RECEIVED_CONNECTION_REQUEST; 6916 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6917 6918 // setup ready Classic ACL connection with con handle 0x0003 6919 addr[5] = 0x03; 6920 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6921 conn->con_handle = addr[5]; 6922 conn->role = HCI_ROLE_SLAVE; 6923 conn->state = OPEN; 6924 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6925 6926 // setup ready Classic SCO connection with con handle 0x0004 6927 addr[5] = 0x04; 6928 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6929 conn->con_handle = addr[5]; 6930 conn->role = HCI_ROLE_SLAVE; 6931 conn->state = OPEN; 6932 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6933 6934 // setup ready LE ACL connection with con handle 0x005 and public address 6935 addr[5] = 0x05; 6936 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6937 conn->con_handle = addr[5]; 6938 conn->role = HCI_ROLE_SLAVE; 6939 conn->state = OPEN; 6940 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6941 conn->sm_connection.sm_connection_encrypted = 1; 6942 } 6943 6944 void hci_free_connections_fuzz(void){ 6945 btstack_linked_list_iterator_t it; 6946 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6947 while (btstack_linked_list_iterator_has_next(&it)){ 6948 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6949 btstack_linked_list_iterator_remove(&it); 6950 btstack_memory_hci_connection_free(con); 6951 } 6952 } 6953 void hci_simulate_working_fuzz(void){ 6954 hci_init_done(); 6955 hci_stack->num_cmd_packets = 255; 6956 } 6957 #endif 6958