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_SEND_BAUD_CHANGE: 1488 if (need_baud_change) { 1489 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1490 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1491 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1492 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1493 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1494 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1495 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1496 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1497 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1498 btstack_run_loop_add_timer(&hci_stack->timeout); 1499 } 1500 break; 1501 } 1502 1503 /* fall through */ 1504 1505 case HCI_INIT_CUSTOM_INIT: 1506 // Custom initialization 1507 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1508 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1509 bool send_cmd = false; 1510 switch (hci_stack->chipset_result){ 1511 case BTSTACK_CHIPSET_VALID_COMMAND: 1512 send_cmd = true; 1513 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1514 break; 1515 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1516 send_cmd = true; 1517 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1518 log_info("CSR Warm Boot"); 1519 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1520 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1521 btstack_run_loop_add_timer(&hci_stack->timeout); 1522 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1523 && hci_stack->config 1524 && hci_stack->chipset 1525 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1526 && hci_stack->hci_transport->set_baudrate 1527 && hci_transport_uart_get_main_baud_rate()){ 1528 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1529 } else { 1530 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1531 } 1532 break; 1533 default: 1534 break; 1535 } 1536 1537 if (send_cmd){ 1538 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1539 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1540 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1541 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1542 break; 1543 } 1544 log_info("Init script done"); 1545 1546 // Init script download on Broadcom chipsets causes: 1547 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1548 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1549 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1550 1551 // - baud rate to reset, restore UART baud rate if needed 1552 if (need_baud_change) { 1553 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1554 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1555 hci_stack->hci_transport->set_baudrate(baud_rate); 1556 } 1557 1558 uint16_t bcm_delay_ms = 300; 1559 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1560 // -> Work around: wait here. 1561 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1562 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1563 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1564 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1565 btstack_run_loop_add_timer(&hci_stack->timeout); 1566 break; 1567 } 1568 } 1569 // otherwise continue 1570 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1571 hci_send_cmd(&hci_read_local_supported_commands); 1572 break; 1573 case HCI_INIT_SET_BD_ADDR: 1574 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1575 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1576 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1577 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1578 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1579 break; 1580 #endif 1581 1582 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1583 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1584 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1585 hci_send_cmd(&hci_read_local_supported_commands); 1586 break; 1587 case HCI_INIT_READ_BD_ADDR: 1588 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1589 hci_send_cmd(&hci_read_bd_addr); 1590 break; 1591 case HCI_INIT_READ_BUFFER_SIZE: 1592 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1593 hci_send_cmd(&hci_read_buffer_size); 1594 break; 1595 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1596 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1597 hci_send_cmd(&hci_read_local_supported_features); 1598 break; 1599 1600 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1601 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1602 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1603 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1604 break; 1605 case HCI_INIT_HOST_BUFFER_SIZE: 1606 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1607 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1608 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1609 break; 1610 #endif 1611 1612 case HCI_INIT_SET_EVENT_MASK: 1613 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1614 if (hci_le_supported()){ 1615 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1616 } else { 1617 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1618 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1619 } 1620 break; 1621 1622 #ifdef ENABLE_CLASSIC 1623 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1624 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1625 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1626 break; 1627 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1628 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1629 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1630 break; 1631 case HCI_INIT_WRITE_INQUIRY_MODE: 1632 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1633 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1634 break; 1635 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1636 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1637 hci_stack->secure_connections_active = true; 1638 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1639 break; 1640 // only sent if ENABLE_SCO_OVER_HCI is defined 1641 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1642 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1643 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1644 break; 1645 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1646 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1647 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1648 break; 1649 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1650 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1651 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1652 #ifdef ENABLE_SCO_OVER_HCI 1653 log_info("BCM: Route SCO data via HCI transport"); 1654 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1655 #endif 1656 #ifdef ENABLE_SCO_OVER_PCM 1657 log_info("BCM: Route SCO data via PCM interface"); 1658 #ifdef ENABLE_BCM_PCM_WBS 1659 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1660 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1661 #else 1662 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1663 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1664 #endif 1665 #endif 1666 break; 1667 #ifdef ENABLE_SCO_OVER_PCM 1668 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1669 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1670 log_info("BCM: Config PCM interface for I2S"); 1671 #ifdef ENABLE_BCM_PCM_WBS 1672 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1673 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1674 #else 1675 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1676 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1677 #endif 1678 break; 1679 #endif 1680 #endif 1681 1682 #ifdef ENABLE_BLE 1683 // LE INIT 1684 case HCI_INIT_LE_READ_BUFFER_SIZE: 1685 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1686 hci_send_cmd(&hci_le_read_buffer_size); 1687 break; 1688 case HCI_INIT_LE_SET_EVENT_MASK: 1689 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1690 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1691 break; 1692 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1693 // LE Supported Host = 1, Simultaneous Host = 0 1694 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1695 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1696 break; 1697 #endif 1698 1699 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1700 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1701 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1702 hci_send_cmd(&hci_le_read_maximum_data_length); 1703 break; 1704 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1705 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1706 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1707 break; 1708 #endif 1709 1710 #ifdef ENABLE_LE_CENTRAL 1711 case HCI_INIT_READ_WHITE_LIST_SIZE: 1712 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1713 hci_send_cmd(&hci_le_read_white_list_size); 1714 break; 1715 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1716 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1717 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); 1718 break; 1719 #endif 1720 default: 1721 return; 1722 } 1723 } 1724 1725 static void hci_init_done(void){ 1726 #ifdef ENABLE_CLASSIC 1727 // init sequence complete, check if GAP Tasks are completed 1728 if (hci_stack->gap_tasks != 0) { 1729 hci_run_gap_tasks_classic(); 1730 return; 1731 } 1732 #endif 1733 1734 // done. tell the app 1735 log_info("hci_init_done -> HCI_STATE_WORKING"); 1736 hci_stack->state = HCI_STATE_WORKING; 1737 hci_emit_state(); 1738 hci_run(); 1739 } 1740 1741 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1742 bool command_completed = false; 1743 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1744 uint16_t opcode = little_endian_read_16(packet,3); 1745 if (opcode == hci_stack->last_cmd_opcode){ 1746 command_completed = true; 1747 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1748 } else { 1749 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1750 } 1751 } 1752 1753 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1754 uint8_t status = packet[2]; 1755 uint16_t opcode = little_endian_read_16(packet,4); 1756 if (opcode == hci_stack->last_cmd_opcode){ 1757 if (status){ 1758 command_completed = true; 1759 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1760 } else { 1761 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1762 } 1763 } else { 1764 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1765 } 1766 } 1767 #ifndef HAVE_HOST_CONTROLLER_API 1768 // Vendor == CSR 1769 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1770 // TODO: track actual command 1771 command_completed = true; 1772 } 1773 1774 // Vendor == Toshiba 1775 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1776 // TODO: track actual command 1777 command_completed = true; 1778 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1779 hci_stack->num_cmd_packets = 1; 1780 } 1781 #endif 1782 1783 return command_completed; 1784 } 1785 1786 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1787 1788 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1789 1790 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1791 1792 #ifndef HAVE_HOST_CONTROLLER_API 1793 1794 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1795 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1796 // 1797 // HCI Reset 1798 // Timeout 100 ms 1799 // HCI Reset 1800 // Command Complete Reset 1801 // HCI Read Local Version Information 1802 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1803 // hang... 1804 // 1805 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1806 if (!command_completed 1807 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1808 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1809 1810 uint16_t opcode = little_endian_read_16(packet,3); 1811 if (opcode == hci_reset.opcode){ 1812 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1813 return; 1814 } 1815 } 1816 1817 // CSR & H5 1818 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1819 if (!command_completed 1820 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1821 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1822 1823 uint16_t opcode = little_endian_read_16(packet,3); 1824 if (opcode == hci_reset.opcode){ 1825 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1826 return; 1827 } 1828 } 1829 1830 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1831 // fix: Correct substate and behave as command below 1832 if (command_completed){ 1833 switch (hci_stack->substate){ 1834 case HCI_INIT_SEND_RESET: 1835 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1836 break; 1837 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1838 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1839 break; 1840 default: 1841 break; 1842 } 1843 } 1844 1845 #endif 1846 1847 if (!command_completed) return; 1848 1849 bool need_baud_change = false; 1850 bool need_addr_change = false; 1851 1852 #ifndef HAVE_HOST_CONTROLLER_API 1853 need_baud_change = hci_stack->config 1854 && hci_stack->chipset 1855 && hci_stack->chipset->set_baudrate_command 1856 && hci_stack->hci_transport->set_baudrate 1857 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1858 1859 need_addr_change = hci_stack->custom_bd_addr_set 1860 && hci_stack->chipset 1861 && hci_stack->chipset->set_bd_addr_command; 1862 #endif 1863 1864 switch(hci_stack->substate){ 1865 1866 #ifndef HAVE_HOST_CONTROLLER_API 1867 case HCI_INIT_SEND_RESET: 1868 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1869 // fix: just correct substate and behave as command below 1870 1871 /* fall through */ 1872 #endif 1873 1874 case HCI_INIT_W4_SEND_RESET: 1875 btstack_run_loop_remove_timer(&hci_stack->timeout); 1876 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1877 return; 1878 1879 #ifndef HAVE_HOST_CONTROLLER_API 1880 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1881 // for STLC2500D, baud rate change already happened. 1882 // for others, baud rate gets changed now 1883 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1884 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1885 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1886 hci_stack->hci_transport->set_baudrate(baud_rate); 1887 } 1888 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1889 return; 1890 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1891 btstack_run_loop_remove_timer(&hci_stack->timeout); 1892 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1893 return; 1894 case HCI_INIT_W4_CUSTOM_INIT: 1895 // repeat custom init 1896 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1897 return; 1898 #endif 1899 1900 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1901 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1902 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1903 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1904 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1905 return; 1906 } 1907 if (need_addr_change){ 1908 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1909 return; 1910 } 1911 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1912 return; 1913 #ifndef HAVE_HOST_CONTROLLER_API 1914 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1915 if (need_baud_change){ 1916 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1917 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1918 hci_stack->hci_transport->set_baudrate(baud_rate); 1919 } 1920 if (need_addr_change){ 1921 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1922 return; 1923 } 1924 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1925 return; 1926 case HCI_INIT_W4_SET_BD_ADDR: 1927 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1928 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1929 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1930 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1931 return; 1932 } 1933 // skipping st warm boot 1934 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1935 return; 1936 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1937 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1938 return; 1939 #endif 1940 case HCI_INIT_W4_READ_BD_ADDR: 1941 // only read buffer size if supported 1942 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1943 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1944 return; 1945 } 1946 // skipping read buffer size 1947 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1948 return; 1949 case HCI_INIT_W4_SET_EVENT_MASK: 1950 // skip Classic init commands for LE only chipsets 1951 if (!hci_classic_supported()){ 1952 #ifdef ENABLE_BLE 1953 if (hci_le_supported()){ 1954 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1955 return; 1956 } 1957 #endif 1958 log_error("Neither BR/EDR nor LE supported"); 1959 hci_init_done(); 1960 return; 1961 } 1962 if (!gap_ssp_supported()){ 1963 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1964 return; 1965 } 1966 break; 1967 #ifdef ENABLE_BLE 1968 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1969 // skip write le host if not supported (e.g. on LE only EM9301) 1970 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1971 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1972 return; 1973 1974 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1975 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1976 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1977 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1978 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1979 return; 1980 } 1981 // explicit fall through to reduce repetitions 1982 1983 #ifdef ENABLE_LE_CENTRAL 1984 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1985 #else 1986 hci_init_done(); 1987 #endif 1988 return; 1989 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1990 1991 #endif /* ENABLE_BLE */ 1992 1993 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1994 // skip write secure connections host support if not supported or disabled 1995 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1996 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1997 return; 1998 } 1999 break; 2000 2001 #ifdef ENABLE_SCO_OVER_HCI 2002 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 2003 // skip write synchronous flow control if not supported 2004 if (hci_stack->local_supported_commands[0] & 0x04) break; 2005 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 2006 2007 /* fall through */ 2008 2009 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2010 // skip write default erroneous data reporting if not supported 2011 if (hci_stack->local_supported_commands[0] & 0x08) break; 2012 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 2013 2014 /* fall through */ 2015 2016 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 2017 // skip bcm set sco pcm config on non-Broadcom chipsets 2018 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 2019 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2020 2021 /* fall through */ 2022 2023 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 2024 if (!hci_le_supported()){ 2025 // SKIP LE init for Classic only configuration 2026 hci_init_done(); 2027 return; 2028 } 2029 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2030 break; 2031 2032 #else /* !ENABLE_SCO_OVER_HCI */ 2033 2034 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 2035 #ifdef ENABLE_SCO_OVER_PCM 2036 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 2037 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 2038 return; 2039 } 2040 #endif 2041 /* fall through */ 2042 2043 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2044 #ifdef ENABLE_BLE 2045 if (hci_le_supported()){ 2046 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 2047 return; 2048 } 2049 #endif 2050 // SKIP LE init for Classic only configuration 2051 hci_init_done(); 2052 return; 2053 #endif /* ENABLE_SCO_OVER_HCI */ 2054 2055 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 2056 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 2057 // Response to command before init done state -> init done 2058 case (HCI_INIT_DONE-1): 2059 hci_init_done(); 2060 return; 2061 #endif 2062 2063 default: 2064 break; 2065 } 2066 hci_initializing_next_state(); 2067 } 2068 2069 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2070 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2071 bd_addr_t bd_address; 2072 (void)memcpy(&bd_address, conn->address, 6); 2073 2074 #ifdef ENABLE_CLASSIC 2075 // cache needed data 2076 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2077 #endif 2078 2079 // connection failed, remove entry 2080 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2081 btstack_memory_hci_connection_free( conn ); 2082 2083 #ifdef ENABLE_CLASSIC 2084 // notify client if dedicated bonding 2085 if (notify_dedicated_bonding_failed){ 2086 log_info("hci notify_dedicated_bonding_failed"); 2087 hci_emit_dedicated_bonding_result(bd_address, status); 2088 } 2089 2090 // if authentication error, also delete link key 2091 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2092 gap_drop_link_key_for_bd_addr(bd_address); 2093 } 2094 #else 2095 UNUSED(status); 2096 #endif 2097 } 2098 2099 #ifdef ENABLE_CLASSIC 2100 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2101 // SSP Controller 2102 if (features[6] & (1 << 3)){ 2103 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2104 } 2105 // eSCO 2106 if (features[3] & (1<<7)){ 2107 conn->remote_supported_features[0] |= 1; 2108 } 2109 // Extended features 2110 if (features[7] & (1<<7)){ 2111 conn->remote_supported_features[0] |= 2; 2112 } 2113 } 2114 2115 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2116 // SSP Host 2117 if (features[0] & (1 << 0)){ 2118 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2119 } 2120 // SC Host 2121 if (features[0] & (1 << 3)){ 2122 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2123 } 2124 } 2125 2126 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2127 // SC Controller 2128 if (features[1] & (1 << 0)){ 2129 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2130 } 2131 } 2132 2133 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2134 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2135 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2136 if (conn->bonding_flags & BONDING_DEDICATED){ 2137 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2138 } 2139 } 2140 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2141 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2142 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2143 } 2144 2145 #endif 2146 2147 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2148 // handle BT initialization 2149 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2150 hci_initializing_event_handler(packet, size); 2151 } 2152 2153 // help with BT sleep 2154 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2155 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2156 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2157 hci_initializing_next_state(); 2158 } 2159 } 2160 2161 #ifdef ENABLE_CLASSIC 2162 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2163 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2164 conn->encryption_key_size = encryption_key_size; 2165 2166 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2167 conn->requested_security_level = LEVEL_0; 2168 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2169 return; 2170 } 2171 2172 // Request Authentication if not already done 2173 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2174 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2175 } 2176 #endif 2177 2178 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2179 UNUSED(size); 2180 2181 uint16_t manufacturer; 2182 #ifdef ENABLE_CLASSIC 2183 hci_con_handle_t handle; 2184 hci_connection_t * conn; 2185 uint8_t status; 2186 #endif 2187 // get num cmd packets - limit to 1 to reduce complexity 2188 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2189 2190 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2191 switch (opcode){ 2192 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2193 if (packet[5]) break; 2194 // terminate, name 248 chars 2195 packet[6+248] = 0; 2196 log_info("local name: %s", &packet[6]); 2197 break; 2198 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2199 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2200 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2201 uint16_t acl_len = little_endian_read_16(packet, 6); 2202 uint16_t sco_len = packet[8]; 2203 2204 // determine usable ACL/SCO payload size 2205 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2206 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2207 2208 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2209 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2210 2211 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2212 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2213 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2214 } 2215 break; 2216 case HCI_OPCODE_HCI_READ_RSSI: 2217 if (packet[5] == ERROR_CODE_SUCCESS){ 2218 uint8_t event[5]; 2219 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2220 event[1] = 3; 2221 (void)memcpy(&event[2], &packet[6], 3); 2222 hci_emit_event(event, sizeof(event), 1); 2223 } 2224 break; 2225 #ifdef ENABLE_BLE 2226 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2227 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2228 hci_stack->le_acl_packets_total_num = packet[8]; 2229 // determine usable ACL payload size 2230 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2231 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2232 } 2233 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2234 break; 2235 #endif 2236 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2237 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2238 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2239 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2240 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); 2241 break; 2242 #endif 2243 #ifdef ENABLE_LE_CENTRAL 2244 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2245 hci_stack->le_whitelist_capacity = packet[6]; 2246 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2247 break; 2248 #endif 2249 case HCI_OPCODE_HCI_READ_BD_ADDR: 2250 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2251 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)); 2252 #ifdef ENABLE_CLASSIC 2253 if (hci_stack->link_key_db){ 2254 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2255 } 2256 #endif 2257 break; 2258 #ifdef ENABLE_CLASSIC 2259 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2260 hci_emit_discoverable_enabled(hci_stack->discoverable); 2261 break; 2262 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2263 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2264 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2265 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2266 hci_emit_event(event, sizeof(event), 1); 2267 } 2268 break; 2269 #endif 2270 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2271 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2272 2273 #ifdef ENABLE_CLASSIC 2274 // determine usable ACL packet types based on host buffer size and supported features 2275 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2276 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2277 #endif 2278 // Classic/LE 2279 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2280 break; 2281 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2282 manufacturer = little_endian_read_16(packet, 10); 2283 // map Cypress to Broadcom 2284 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2285 log_info("Treat Cypress as Broadcom"); 2286 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2287 little_endian_store_16(packet, 10, manufacturer); 2288 } 2289 hci_stack->manufacturer = manufacturer; 2290 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2291 break; 2292 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2293 hci_stack->local_supported_commands[0] = 2294 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2295 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2296 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2297 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2298 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2299 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2300 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2301 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2302 hci_stack->local_supported_commands[1] = 2303 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2304 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2305 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2306 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2307 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2308 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2309 break; 2310 #ifdef ENABLE_CLASSIC 2311 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2312 if (packet[5]) return; 2313 hci_stack->synchronous_flow_control_enabled = 1; 2314 break; 2315 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2316 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2317 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2318 conn = hci_connection_for_handle(handle); 2319 if (conn != NULL) { 2320 uint8_t key_size = 0; 2321 if (status == 0){ 2322 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2323 log_info("Handle %04x key Size: %u", handle, key_size); 2324 } else { 2325 key_size = 1; 2326 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2327 } 2328 hci_handle_read_encryption_key_size_complete(conn, key_size); 2329 } 2330 break; 2331 // assert pairing complete event is emitted. 2332 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2333 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2334 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2335 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2336 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2337 // lookup connection by gap pairing addr 2338 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2339 if (conn == NULL) break; 2340 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2341 break; 2342 2343 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2344 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2345 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2346 uint8_t event[67]; 2347 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2348 event[1] = 65; 2349 (void)memset(&event[2], 0, 65); 2350 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2351 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2352 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2353 event[2] = 3; 2354 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2355 } else { 2356 event[2] = 1; 2357 } 2358 } 2359 hci_emit_event(event, sizeof(event), 0); 2360 break; 2361 } 2362 2363 // note: only needed if user does not provide OOB data 2364 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2365 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2366 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2367 if (conn == NULL) break; 2368 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2369 break; 2370 #endif 2371 #endif 2372 default: 2373 break; 2374 } 2375 } 2376 2377 #ifdef ENABLE_BLE 2378 static void event_handle_le_connection_complete(const uint8_t * packet){ 2379 bd_addr_t addr; 2380 bd_addr_type_t addr_type; 2381 hci_connection_t * conn; 2382 2383 // Connection management 2384 reverse_bd_addr(&packet[8], addr); 2385 addr_type = (bd_addr_type_t)packet[7]; 2386 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2387 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2388 2389 #ifdef ENABLE_LE_CENTRAL 2390 // handle error: error is reported only to the initiator -> outgoing connection 2391 if (packet[3]){ 2392 2393 // handle cancelled outgoing connection 2394 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2395 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2396 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2397 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2398 // reset state 2399 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2400 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2401 // get outgoing connection conn struct for direct connect 2402 conn = gap_get_outgoing_connection(); 2403 } 2404 2405 // outgoing le connection establishment is done 2406 if (conn){ 2407 // remove entry 2408 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2409 btstack_memory_hci_connection_free( conn ); 2410 } 2411 return; 2412 } 2413 #endif 2414 2415 // on success, both hosts receive connection complete event 2416 if (packet[6] == HCI_ROLE_MASTER){ 2417 #ifdef ENABLE_LE_CENTRAL 2418 // if we're master on an le connection, it was an outgoing connection and we're done with it 2419 // note: no hci_connection_t object exists yet for connect with whitelist 2420 if (hci_is_le_connection_type(addr_type)){ 2421 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2422 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2423 } 2424 #endif 2425 } else { 2426 #ifdef ENABLE_LE_PERIPHERAL 2427 // if we're slave, it was an incoming connection, advertisements have stopped 2428 hci_stack->le_advertisements_active = false; 2429 #endif 2430 } 2431 2432 // LE connections are auto-accepted, so just create a connection if there isn't one already 2433 if (!conn){ 2434 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2435 } 2436 2437 // no memory, sorry. 2438 if (!conn){ 2439 return; 2440 } 2441 2442 conn->state = OPEN; 2443 conn->role = packet[6]; 2444 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2445 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2446 2447 #ifdef ENABLE_LE_PERIPHERAL 2448 if (packet[6] == HCI_ROLE_SLAVE){ 2449 hci_update_advertisements_enabled_for_current_roles(); 2450 } 2451 #endif 2452 2453 // init unenhanced att bearer mtu 2454 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2455 conn->att_connection.mtu_exchanged = false; 2456 2457 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2458 2459 // restart timer 2460 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2461 // btstack_run_loop_add_timer(&conn->timeout); 2462 2463 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2464 2465 hci_emit_nr_connections_changed(); 2466 } 2467 #endif 2468 2469 #ifdef ENABLE_CLASSIC 2470 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){ 2471 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2472 // LEVEL_4 is tested by l2cap 2473 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2474 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2475 if (level >= LEVEL_3){ 2476 // MITM not possible without keyboard or display 2477 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2478 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2479 2480 // MITM possible if one side has keyboard and the other has keyboard or display 2481 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2482 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2483 2484 // MITM not possible if one side has only display and other side has no keyboard 2485 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2486 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2487 } 2488 // LEVEL 2 requires SSP, which is a given 2489 return true; 2490 } 2491 2492 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2493 uint16_t i; 2494 for (i=0; i < size ; i++){ 2495 if (data[i] != 0) { 2496 return false; 2497 } 2498 } 2499 return true; 2500 } 2501 2502 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2503 // get requested security level 2504 gap_security_level_t requested_security_level = conn->requested_security_level; 2505 if (hci_stack->gap_secure_connections_only_mode){ 2506 requested_security_level = LEVEL_4; 2507 } 2508 2509 // assess security: LEVEL 4 requires SC 2510 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2511 if ((requested_security_level == LEVEL_4) && 2512 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2513 !hci_remote_sc_enabled(conn)){ 2514 log_info("Level 4 required, but SC not supported -> abort"); 2515 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2516 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2517 return; 2518 } 2519 2520 // assess security based on io capabilities 2521 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2522 // responder: fully validate io caps of both sides as well as OOB data 2523 bool security_possible = false; 2524 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2525 2526 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2527 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2528 // so we merge the OOB data availability 2529 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2530 if (conn->classic_oob_c_192 != NULL){ 2531 have_oob_data |= 1; 2532 } 2533 if (conn->classic_oob_c_256 != NULL){ 2534 have_oob_data |= 2; 2535 } 2536 // for up to Level 3, either P-192 as well as P-256 will do 2537 // 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 2538 // if remote does not SC, we should not receive P-256 data either 2539 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2540 security_possible = true; 2541 } 2542 // for Level 4, P-256 is needed 2543 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2544 security_possible = true; 2545 } 2546 #endif 2547 2548 if (security_possible == false){ 2549 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2550 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2551 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2552 return; 2553 } 2554 } else { 2555 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2556 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2557 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2558 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2559 log_info("Level 3+ required, but no input/output -> abort"); 2560 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2561 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2562 return; 2563 } 2564 #endif 2565 #endif 2566 } 2567 2568 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2569 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2570 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2571 } else { 2572 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2573 } 2574 #endif 2575 } 2576 2577 #endif 2578 2579 static void event_handler(uint8_t *packet, uint16_t size){ 2580 2581 uint16_t event_length = packet[1]; 2582 2583 // assert packet is complete 2584 if (size != (event_length + 2u)){ 2585 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2586 return; 2587 } 2588 2589 bd_addr_type_t addr_type; 2590 hci_con_handle_t handle; 2591 hci_connection_t * conn; 2592 int i; 2593 int create_connection_cmd; 2594 2595 #ifdef ENABLE_CLASSIC 2596 hci_link_type_t link_type; 2597 bd_addr_t addr; 2598 #endif 2599 2600 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2601 2602 switch (hci_event_packet_get_type(packet)) { 2603 2604 case HCI_EVENT_COMMAND_COMPLETE: 2605 handle_command_complete_event(packet, size); 2606 break; 2607 2608 case HCI_EVENT_COMMAND_STATUS: 2609 // get num cmd packets - limit to 1 to reduce complexity 2610 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2611 2612 // check command status to detected failed outgoing connections 2613 create_connection_cmd = 0; 2614 #ifdef ENABLE_CLASSIC 2615 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2616 create_connection_cmd = 1; 2617 } 2618 #endif 2619 #ifdef ENABLE_LE_CENTRAL 2620 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2621 create_connection_cmd = 1; 2622 } 2623 #endif 2624 if (create_connection_cmd) { 2625 uint8_t status = hci_event_command_status_get_status(packet); 2626 addr_type = hci_stack->outgoing_addr_type; 2627 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2628 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); 2629 2630 // reset outgoing address info 2631 memset(hci_stack->outgoing_addr, 0, 6); 2632 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2633 2634 // on error 2635 if (status != ERROR_CODE_SUCCESS){ 2636 #ifdef ENABLE_LE_CENTRAL 2637 if (hci_is_le_connection_type(addr_type)){ 2638 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2639 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2640 } 2641 #endif 2642 // error => outgoing connection failed 2643 if (conn != NULL){ 2644 hci_handle_connection_failed(conn, status); 2645 } 2646 } 2647 } 2648 2649 #ifdef ENABLE_CLASSIC 2650 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2651 uint8_t status = hci_event_command_status_get_status(packet); 2652 log_info("command status (inquiry), status %x", status); 2653 if (status == ERROR_CODE_SUCCESS) { 2654 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2655 } else { 2656 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2657 } 2658 } 2659 #endif 2660 break; 2661 2662 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2663 if (size < 3) return; 2664 uint16_t num_handles = packet[2]; 2665 if (size != (3u + num_handles * 4u)) return; 2666 uint16_t offset = 3; 2667 for (i=0; i<num_handles;i++){ 2668 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2669 offset += 2u; 2670 uint16_t num_packets = little_endian_read_16(packet, offset); 2671 offset += 2u; 2672 2673 conn = hci_connection_for_handle(handle); 2674 if (!conn){ 2675 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2676 continue; 2677 } 2678 2679 if (conn->num_packets_sent >= num_packets){ 2680 conn->num_packets_sent -= num_packets; 2681 } else { 2682 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2683 conn->num_packets_sent = 0; 2684 } 2685 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2686 2687 #ifdef ENABLE_CLASSIC 2688 // For SCO, we do the can_send_now_check here 2689 hci_notify_if_sco_can_send_now(); 2690 #endif 2691 } 2692 break; 2693 } 2694 2695 #ifdef ENABLE_CLASSIC 2696 case HCI_EVENT_INQUIRY_COMPLETE: 2697 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2698 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2699 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2700 hci_emit_event(event, sizeof(event), 1); 2701 } 2702 break; 2703 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2704 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2705 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2706 } 2707 break; 2708 case HCI_EVENT_CONNECTION_REQUEST: 2709 reverse_bd_addr(&packet[2], addr); 2710 link_type = (hci_link_type_t) packet[11]; 2711 2712 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2713 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2714 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2715 bd_addr_copy(hci_stack->decline_addr, addr); 2716 break; 2717 } 2718 2719 if (hci_stack->gap_classic_accept_callback != NULL){ 2720 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2721 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2722 bd_addr_copy(hci_stack->decline_addr, addr); 2723 break; 2724 } 2725 } 2726 2727 // TODO: eval COD 8-10 2728 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2729 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2730 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2731 if (!conn) { 2732 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2733 } 2734 if (!conn) { 2735 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2736 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2737 bd_addr_copy(hci_stack->decline_addr, addr); 2738 break; 2739 } 2740 conn->role = HCI_ROLE_SLAVE; 2741 conn->state = RECEIVED_CONNECTION_REQUEST; 2742 // store info about eSCO 2743 if (link_type == HCI_LINK_TYPE_ESCO){ 2744 conn->remote_supported_features[0] |= 1; 2745 } 2746 hci_run(); 2747 break; 2748 2749 case HCI_EVENT_CONNECTION_COMPLETE: 2750 // Connection management 2751 reverse_bd_addr(&packet[5], addr); 2752 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2753 addr_type = BD_ADDR_TYPE_ACL; 2754 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2755 if (conn) { 2756 if (!packet[2]){ 2757 conn->state = OPEN; 2758 conn->con_handle = little_endian_read_16(packet, 3); 2759 2760 // queue get remote feature 2761 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2762 2763 // queue set supervision timeout if we're master 2764 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2765 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2766 } 2767 2768 // restart timer 2769 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2770 btstack_run_loop_add_timer(&conn->timeout); 2771 2772 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2773 2774 hci_emit_nr_connections_changed(); 2775 } else { 2776 // connection failed 2777 hci_handle_connection_failed(conn, packet[2]); 2778 } 2779 } 2780 break; 2781 2782 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2783 reverse_bd_addr(&packet[5], addr); 2784 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2785 if (packet[2]){ 2786 // connection failed 2787 break; 2788 } 2789 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2790 if (!conn) { 2791 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2792 } 2793 if (!conn) { 2794 break; 2795 } 2796 conn->state = OPEN; 2797 conn->con_handle = little_endian_read_16(packet, 3); 2798 2799 #ifdef ENABLE_SCO_OVER_HCI 2800 // update SCO 2801 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2802 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2803 } 2804 // trigger can send now 2805 if (hci_have_usb_transport()){ 2806 hci_stack->sco_can_send_now = true; 2807 } 2808 #endif 2809 #ifdef HAVE_SCO_TRANSPORT 2810 // configure sco transport 2811 if (hci_stack->sco_transport != NULL){ 2812 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2813 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2814 } 2815 #endif 2816 break; 2817 2818 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2819 handle = little_endian_read_16(packet, 3); 2820 conn = hci_connection_for_handle(handle); 2821 if (!conn) break; 2822 if (!packet[2]){ 2823 const uint8_t * features = &packet[5]; 2824 hci_handle_remote_features_page_0(conn, features); 2825 2826 // read extended features if possible 2827 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2828 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2829 break; 2830 } 2831 } 2832 hci_handle_remote_features_received(conn); 2833 break; 2834 2835 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2836 handle = little_endian_read_16(packet, 3); 2837 conn = hci_connection_for_handle(handle); 2838 if (!conn) break; 2839 // status = ok, page = 1 2840 if (!packet[2]) { 2841 uint8_t page_number = packet[5]; 2842 uint8_t maximum_page_number = packet[6]; 2843 const uint8_t * features = &packet[7]; 2844 bool done = false; 2845 switch (page_number){ 2846 case 1: 2847 hci_handle_remote_features_page_1(conn, features); 2848 if (maximum_page_number >= 2){ 2849 // get Secure Connections (Controller) from Page 2 if available 2850 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2851 } else { 2852 // otherwise, assume SC (Controller) == SC (Host) 2853 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2854 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2855 } 2856 done = true; 2857 } 2858 break; 2859 case 2: 2860 hci_handle_remote_features_page_2(conn, features); 2861 done = true; 2862 break; 2863 default: 2864 break; 2865 } 2866 if (!done) break; 2867 } 2868 hci_handle_remote_features_received(conn); 2869 break; 2870 2871 case HCI_EVENT_LINK_KEY_REQUEST: 2872 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2873 hci_event_link_key_request_get_bd_addr(packet, addr); 2874 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2875 if (!conn) break; 2876 2877 // lookup link key in db if not cached 2878 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2879 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2880 } 2881 2882 // response sent by hci_run() 2883 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2884 #endif 2885 break; 2886 2887 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2888 hci_event_link_key_request_get_bd_addr(packet, addr); 2889 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2890 if (!conn) break; 2891 2892 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2893 2894 // CVE-2020-26555: ignore NULL link key 2895 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2896 if (btstack_is_null(&packet[8], 16)) break; 2897 2898 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2899 // Change Connection Encryption keeps link key type 2900 if (link_key_type != CHANGED_COMBINATION_KEY){ 2901 conn->link_key_type = link_key_type; 2902 } 2903 2904 // cache link key. link keys stored in little-endian format for legacy reasons 2905 memcpy(&conn->link_key, &packet[8], 16); 2906 2907 // only store link key: 2908 // - if bondable enabled 2909 if (hci_stack->bondable == false) break; 2910 // - if security level sufficient 2911 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2912 // - for SSP, also check if remote side requested bonding as well 2913 if (conn->link_key_type != COMBINATION_KEY){ 2914 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2915 if (!remote_bonding){ 2916 break; 2917 } 2918 } 2919 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2920 break; 2921 } 2922 2923 case HCI_EVENT_PIN_CODE_REQUEST: 2924 hci_event_pin_code_request_get_bd_addr(packet, addr); 2925 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2926 if (!conn) break; 2927 2928 hci_pairing_started(conn, false); 2929 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2930 if (!hci_stack->bondable ){ 2931 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2932 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2933 hci_run(); 2934 return; 2935 } 2936 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2937 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2938 log_info("Level 4 required, but SC not supported -> abort"); 2939 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2940 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2941 hci_run(); 2942 return; 2943 } 2944 break; 2945 2946 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2947 hci_event_io_capability_response_get_bd_addr(packet, addr); 2948 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2949 if (!conn) break; 2950 2951 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2952 hci_pairing_started(conn, true); 2953 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2954 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2955 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2956 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2957 #endif 2958 break; 2959 2960 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2961 hci_event_io_capability_response_get_bd_addr(packet, addr); 2962 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2963 if (!conn) break; 2964 2965 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2966 hci_connection_timestamp(conn); 2967 hci_pairing_started(conn, true); 2968 break; 2969 2970 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2971 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2972 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2973 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2974 if (!conn) break; 2975 2976 hci_connection_timestamp(conn); 2977 2978 hci_pairing_started(conn, true); 2979 2980 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2981 break; 2982 #endif 2983 2984 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2985 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2986 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2987 if (!conn) break; 2988 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2989 if (hci_stack->ssp_auto_accept){ 2990 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2991 }; 2992 } else { 2993 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2994 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2995 // don't forward event to app 2996 hci_run(); 2997 return; 2998 } 2999 break; 3000 3001 case HCI_EVENT_USER_PASSKEY_REQUEST: 3002 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3003 if (hci_stack->ssp_auto_accept){ 3004 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3005 }; 3006 break; 3007 3008 case HCI_EVENT_MODE_CHANGE: 3009 handle = hci_event_mode_change_get_handle(packet); 3010 conn = hci_connection_for_handle(handle); 3011 if (!conn) break; 3012 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3013 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3014 break; 3015 #endif 3016 3017 case HCI_EVENT_ENCRYPTION_CHANGE: 3018 handle = hci_event_encryption_change_get_connection_handle(packet); 3019 conn = hci_connection_for_handle(handle); 3020 if (!conn) break; 3021 if (hci_event_encryption_change_get_status(packet) == 0u) { 3022 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3023 if (encryption_enabled){ 3024 if (hci_is_le_connection(conn)){ 3025 // For LE, we accept connection as encrypted 3026 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3027 } 3028 #ifdef ENABLE_CLASSIC 3029 else { 3030 3031 // dedicated bonding: send result and disconnect 3032 if (conn->bonding_flags & BONDING_DEDICATED){ 3033 conn->bonding_flags &= ~BONDING_DEDICATED; 3034 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3035 conn->bonding_status = packet[2]; 3036 break; 3037 } 3038 3039 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3040 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3041 bool connected_uses_aes_ccm = encryption_enabled == 2; 3042 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3043 log_info("SC during pairing, but only E0 now -> abort"); 3044 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3045 break; 3046 } 3047 3048 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3049 if (connected_uses_aes_ccm){ 3050 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3051 } 3052 3053 #ifdef ENABLE_TESTING_SUPPORT 3054 // work around for issue with PTS dongle 3055 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3056 #endif 3057 3058 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3059 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3060 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3061 } else { 3062 // if not, pretend everything is perfect 3063 hci_handle_read_encryption_key_size_complete(conn, 16); 3064 } 3065 } 3066 #endif 3067 } else { 3068 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3069 } 3070 } 3071 3072 break; 3073 3074 #ifdef ENABLE_CLASSIC 3075 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3076 handle = hci_event_authentication_complete_get_connection_handle(packet); 3077 conn = hci_connection_for_handle(handle); 3078 if (!conn) break; 3079 3080 // clear authentication active flag 3081 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3082 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3083 3084 // authenticated only if auth status == 0 3085 if (hci_event_authentication_complete_get_status(packet) == 0){ 3086 // authenticated 3087 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3088 3089 // If not already encrypted, start encryption 3090 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3091 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3092 break; 3093 } 3094 } 3095 3096 // emit updated security level 3097 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3098 break; 3099 3100 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3101 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3102 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3103 if (!conn) break; 3104 3105 // treat successfully paired connection as authenticated 3106 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3107 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3108 } 3109 3110 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3111 break; 3112 #endif 3113 3114 // HCI_EVENT_DISCONNECTION_COMPLETE 3115 // has been split, to first notify stack before shutting connection down 3116 // see end of function, too. 3117 case HCI_EVENT_DISCONNECTION_COMPLETE: 3118 if (packet[2]) break; // status != 0 3119 handle = little_endian_read_16(packet, 3); 3120 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3121 if (hci_stack->acl_fragmentation_total_size > 0u) { 3122 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3123 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3124 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3125 hci_stack->acl_fragmentation_total_size = 0; 3126 hci_stack->acl_fragmentation_pos = 0; 3127 if (release_buffer){ 3128 hci_release_packet_buffer(); 3129 } 3130 } 3131 } 3132 3133 conn = hci_connection_for_handle(handle); 3134 if (!conn) break; 3135 #ifdef ENABLE_CLASSIC 3136 // pairing failed if it was ongoing 3137 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3138 #endif 3139 3140 // emit dedicatd bonding event 3141 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3142 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3143 } 3144 3145 // mark connection for shutdown, stop timers, reset state 3146 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3147 hci_connection_stop_timer(conn); 3148 hci_connection_init(conn); 3149 3150 #ifdef ENABLE_BLE 3151 #ifdef ENABLE_LE_PERIPHERAL 3152 // re-enable advertisements for le connections if active 3153 if (hci_is_le_connection(conn)){ 3154 hci_update_advertisements_enabled_for_current_roles(); 3155 } 3156 #endif 3157 #endif 3158 break; 3159 3160 case HCI_EVENT_HARDWARE_ERROR: 3161 log_error("Hardware Error: 0x%02x", packet[2]); 3162 if (hci_stack->hardware_error_callback){ 3163 (*hci_stack->hardware_error_callback)(packet[2]); 3164 } else { 3165 // if no special requests, just reboot stack 3166 hci_power_control_off(); 3167 hci_power_control_on(); 3168 } 3169 break; 3170 3171 #ifdef ENABLE_CLASSIC 3172 case HCI_EVENT_ROLE_CHANGE: 3173 if (packet[2]) break; // status != 0 3174 reverse_bd_addr(&packet[3], addr); 3175 addr_type = BD_ADDR_TYPE_ACL; 3176 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3177 if (!conn) break; 3178 conn->role = packet[9]; 3179 break; 3180 #endif 3181 3182 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3183 // release packet buffer only for asynchronous transport and if there are not further fragements 3184 if (hci_transport_synchronous()) { 3185 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3186 return; // instead of break: to avoid re-entering hci_run() 3187 } 3188 hci_stack->acl_fragmentation_tx_active = 0; 3189 if (hci_stack->acl_fragmentation_total_size) break; 3190 hci_release_packet_buffer(); 3191 3192 // L2CAP receives this event via the hci_emit_event below 3193 3194 #ifdef ENABLE_CLASSIC 3195 // For SCO, we do the can_send_now_check here 3196 hci_notify_if_sco_can_send_now(); 3197 #endif 3198 break; 3199 3200 #ifdef ENABLE_CLASSIC 3201 case HCI_EVENT_SCO_CAN_SEND_NOW: 3202 // For SCO, we do the can_send_now_check here 3203 hci_stack->sco_can_send_now = true; 3204 hci_notify_if_sco_can_send_now(); 3205 return; 3206 3207 // explode inquriy results for easier consumption 3208 case HCI_EVENT_INQUIRY_RESULT: 3209 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3210 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3211 gap_inquiry_explode(packet, size); 3212 break; 3213 #endif 3214 3215 #ifdef ENABLE_BLE 3216 case HCI_EVENT_LE_META: 3217 switch (packet[2]){ 3218 #ifdef ENABLE_LE_CENTRAL 3219 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3220 // log_info("advertising report received"); 3221 if (!hci_stack->le_scanning_enabled) break; 3222 le_handle_advertisement_report(packet, size); 3223 break; 3224 #endif 3225 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3226 event_handle_le_connection_complete(packet); 3227 break; 3228 3229 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3230 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3231 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3232 conn = hci_connection_for_handle(handle); 3233 if (!conn) break; 3234 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3235 break; 3236 3237 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3238 // connection 3239 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3240 conn = hci_connection_for_handle(handle); 3241 if (conn) { 3242 // read arguments 3243 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3244 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3245 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3246 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3247 3248 // validate against current connection parameter range 3249 le_connection_parameter_range_t existing_range; 3250 gap_get_connection_parameter_range(&existing_range); 3251 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3252 if (update_parameter){ 3253 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3254 conn->le_conn_interval_min = le_conn_interval_min; 3255 conn->le_conn_interval_max = le_conn_interval_max; 3256 conn->le_conn_latency = le_conn_latency; 3257 conn->le_supervision_timeout = le_supervision_timeout; 3258 } else { 3259 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3260 } 3261 } 3262 break; 3263 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3264 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3265 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3266 conn = hci_connection_for_handle(handle); 3267 if (conn) { 3268 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3269 } 3270 break; 3271 #endif 3272 default: 3273 break; 3274 } 3275 break; 3276 #endif 3277 case HCI_EVENT_VENDOR_SPECIFIC: 3278 // Vendor specific commands often create vendor specific event instead of num completed packets 3279 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3280 switch (hci_stack->manufacturer){ 3281 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3282 hci_stack->num_cmd_packets = 1; 3283 break; 3284 default: 3285 break; 3286 } 3287 break; 3288 default: 3289 break; 3290 } 3291 3292 handle_event_for_current_stack_state(packet, size); 3293 3294 // notify upper stack 3295 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3296 3297 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3298 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3299 handle = little_endian_read_16(packet, 3); 3300 hci_connection_t * aConn = hci_connection_for_handle(handle); 3301 // discard connection if app did not trigger a reconnect in the event handler 3302 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3303 hci_shutdown_connection(aConn); 3304 } 3305 } 3306 3307 // execute main loop 3308 hci_run(); 3309 } 3310 3311 #ifdef ENABLE_CLASSIC 3312 3313 #ifdef ENABLE_SCO_OVER_HCI 3314 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3315 static void sco_schedule_tx(hci_connection_t * conn); 3316 3317 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3318 log_debug("SCO TX Timeout"); 3319 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3320 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3321 if (!conn) return; 3322 3323 // trigger send 3324 conn->sco_tx_ready = 1; 3325 // extra packet if CVSD but SCO buffer is too short 3326 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3327 conn->sco_tx_ready++; 3328 } 3329 hci_notify_if_sco_can_send_now(); 3330 } 3331 3332 3333 #define SCO_TX_AFTER_RX_MS (6) 3334 3335 static void sco_schedule_tx(hci_connection_t * conn){ 3336 3337 uint32_t now = btstack_run_loop_get_time_ms(); 3338 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3339 int time_delta_ms = sco_tx_ms - now; 3340 3341 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3342 3343 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3344 btstack_run_loop_remove_timer(timer); 3345 btstack_run_loop_set_timer(timer, time_delta_ms); 3346 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3347 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3348 btstack_run_loop_add_timer(timer); 3349 } 3350 #endif 3351 3352 static void sco_handler(uint8_t * packet, uint16_t size){ 3353 // lookup connection struct 3354 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3355 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3356 if (!conn) return; 3357 3358 #ifdef ENABLE_SCO_OVER_HCI 3359 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3360 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3361 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3362 packet[2] = 0x3c; 3363 memmove(&packet[3], &packet[23], 63); 3364 size = 63; 3365 } 3366 } 3367 3368 if (hci_have_usb_transport()){ 3369 // Nothing to do 3370 } else { 3371 // 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); 3372 if (hci_stack->synchronous_flow_control_enabled == 0){ 3373 uint32_t now = btstack_run_loop_get_time_ms(); 3374 3375 if (!conn->sco_rx_valid){ 3376 // ignore first 10 packets 3377 conn->sco_rx_count++; 3378 // log_debug("sco rx count %u", conn->sco_rx_count); 3379 if (conn->sco_rx_count == 10) { 3380 // use first timestamp as is and pretent it just started 3381 conn->sco_rx_ms = now; 3382 conn->sco_rx_valid = 1; 3383 conn->sco_rx_count = 0; 3384 sco_schedule_tx(conn); 3385 } 3386 } else { 3387 // track expected arrival timme 3388 conn->sco_rx_count++; 3389 conn->sco_rx_ms += 7; 3390 int delta = (int32_t) (now - conn->sco_rx_ms); 3391 if (delta > 0){ 3392 conn->sco_rx_ms++; 3393 } 3394 // log_debug("sco rx %u", conn->sco_rx_ms); 3395 sco_schedule_tx(conn); 3396 } 3397 } 3398 } 3399 #endif 3400 3401 // deliver to app 3402 if (hci_stack->sco_packet_handler) { 3403 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3404 } 3405 3406 #ifdef HAVE_SCO_TRANSPORT 3407 // We can send one packet for each received packet 3408 conn->sco_tx_ready++; 3409 hci_notify_if_sco_can_send_now(); 3410 #endif 3411 3412 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3413 conn->num_packets_completed++; 3414 hci_stack->host_completed_packets = 1; 3415 hci_run(); 3416 #endif 3417 } 3418 #endif 3419 3420 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3421 hci_dump_packet(packet_type, 1, packet, size); 3422 switch (packet_type) { 3423 case HCI_EVENT_PACKET: 3424 event_handler(packet, size); 3425 break; 3426 case HCI_ACL_DATA_PACKET: 3427 acl_handler(packet, size); 3428 break; 3429 #ifdef ENABLE_CLASSIC 3430 case HCI_SCO_DATA_PACKET: 3431 sco_handler(packet, size); 3432 break; 3433 #endif 3434 default: 3435 break; 3436 } 3437 } 3438 3439 /** 3440 * @brief Add event packet handler. 3441 */ 3442 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3443 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3444 } 3445 3446 3447 /** Register HCI packet handlers */ 3448 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3449 hci_stack->acl_packet_handler = handler; 3450 } 3451 3452 #ifdef ENABLE_CLASSIC 3453 /** 3454 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3455 */ 3456 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3457 hci_stack->sco_packet_handler = handler; 3458 } 3459 #endif 3460 3461 static void hci_state_reset(void){ 3462 // no connections yet 3463 hci_stack->connections = NULL; 3464 3465 // keep discoverable/connectable as this has been requested by the client(s) 3466 // hci_stack->discoverable = 0; 3467 // hci_stack->connectable = 0; 3468 // hci_stack->bondable = 1; 3469 // hci_stack->own_addr_type = 0; 3470 3471 // buffer is free 3472 hci_stack->hci_packet_buffer_reserved = false; 3473 3474 // no pending cmds 3475 hci_stack->decline_reason = 0; 3476 3477 hci_stack->secure_connections_active = false; 3478 3479 #ifdef ENABLE_CLASSIC 3480 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3481 hci_stack->gap_tasks = 3482 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3483 GAP_TASK_SET_CLASS_OF_DEVICE | 3484 GAP_TASK_SET_LOCAL_NAME | 3485 GAP_TASK_SET_EIR_DATA | 3486 GAP_TASK_WRITE_SCAN_ENABLE; 3487 #endif 3488 3489 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3490 hci_stack->classic_read_local_oob_data = true; 3491 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3492 #endif 3493 3494 // LE 3495 #ifdef ENABLE_BLE 3496 memset(hci_stack->le_random_address, 0, 6); 3497 hci_stack->le_random_address_set = 0; 3498 #endif 3499 #ifdef ENABLE_LE_CENTRAL 3500 hci_stack->le_scanning_active = false; 3501 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3502 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3503 hci_stack->le_whitelist_capacity = 0; 3504 #endif 3505 #ifdef ENABLE_LE_PERIPHERAL 3506 hci_stack->le_advertisements_active = false; 3507 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3508 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3509 } 3510 if (hci_stack->le_advertisements_data != NULL){ 3511 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3512 } 3513 #endif 3514 } 3515 3516 #ifdef ENABLE_CLASSIC 3517 /** 3518 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3519 */ 3520 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3521 // store and open remote device db 3522 hci_stack->link_key_db = link_key_db; 3523 if (hci_stack->link_key_db) { 3524 hci_stack->link_key_db->open(); 3525 } 3526 } 3527 #endif 3528 3529 void hci_init(const hci_transport_t *transport, const void *config){ 3530 3531 #ifdef HAVE_MALLOC 3532 if (!hci_stack) { 3533 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3534 } 3535 #else 3536 hci_stack = &hci_stack_static; 3537 #endif 3538 memset(hci_stack, 0, sizeof(hci_stack_t)); 3539 3540 // reference to use transport layer implementation 3541 hci_stack->hci_transport = transport; 3542 3543 // reference to used config 3544 hci_stack->config = config; 3545 3546 // setup pointer for outgoing packet buffer 3547 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3548 3549 // max acl payload size defined in config.h 3550 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3551 3552 // register packet handlers with transport 3553 transport->register_packet_handler(&packet_handler); 3554 3555 hci_stack->state = HCI_STATE_OFF; 3556 3557 // class of device 3558 hci_stack->class_of_device = 0x007a020c; // Smartphone 3559 3560 // bondable by default 3561 hci_stack->bondable = 1; 3562 3563 #ifdef ENABLE_CLASSIC 3564 // classic name 3565 hci_stack->local_name = default_classic_name; 3566 3567 // Master slave policy 3568 hci_stack->master_slave_policy = 1; 3569 3570 // Allow Role Switch 3571 hci_stack->allow_role_switch = 1; 3572 3573 // Default / minimum security level = 2 3574 hci_stack->gap_security_level = LEVEL_2; 3575 3576 // Default Security Mode 4 3577 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3578 3579 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3580 hci_stack->gap_required_encyrption_key_size = 7; 3581 3582 // Link Supervision Timeout 3583 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3584 3585 #endif 3586 3587 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3588 hci_stack->ssp_enable = 1; 3589 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3590 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3591 hci_stack->ssp_auto_accept = 1; 3592 3593 // Secure Connections: enable (requires support from Controller) 3594 hci_stack->secure_connections_enable = true; 3595 3596 // voice setting - signed 16 bit pcm data with CVSD over the air 3597 hci_stack->sco_voice_setting = 0x60; 3598 3599 #ifdef ENABLE_LE_CENTRAL 3600 // connection parameter to use for outgoing connections 3601 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3602 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3603 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3604 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3605 hci_stack->le_connection_latency = 4; // 4 3606 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3607 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3608 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3609 3610 // default LE Scanning 3611 hci_stack->le_scan_type = 0x1; // active 3612 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3613 hci_stack->le_scan_window = 0x30; // 30 ms 3614 #endif 3615 3616 #ifdef ENABLE_LE_PERIPHERAL 3617 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3618 #endif 3619 3620 // connection parameter range used to answer connection parameter update requests in l2cap 3621 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3622 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3623 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3624 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3625 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3626 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3627 3628 hci_state_reset(); 3629 } 3630 3631 void hci_deinit(void){ 3632 #ifdef HAVE_MALLOC 3633 if (hci_stack) { 3634 free(hci_stack); 3635 } 3636 #endif 3637 hci_stack = NULL; 3638 3639 #ifdef ENABLE_CLASSIC 3640 disable_l2cap_timeouts = 0; 3641 #endif 3642 } 3643 3644 /** 3645 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3646 */ 3647 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3648 hci_stack->chipset = chipset_driver; 3649 3650 // reset chipset driver - init is also called on power_up 3651 if (hci_stack->chipset && hci_stack->chipset->init){ 3652 hci_stack->chipset->init(hci_stack->config); 3653 } 3654 } 3655 3656 /** 3657 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3658 */ 3659 void hci_set_control(const btstack_control_t *hardware_control){ 3660 // references to used control implementation 3661 hci_stack->control = hardware_control; 3662 // init with transport config 3663 hardware_control->init(hci_stack->config); 3664 } 3665 3666 void hci_close(void){ 3667 3668 #ifdef ENABLE_CLASSIC 3669 // close remote device db 3670 if (hci_stack->link_key_db) { 3671 hci_stack->link_key_db->close(); 3672 } 3673 #endif 3674 3675 btstack_linked_list_iterator_t lit; 3676 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3677 while (btstack_linked_list_iterator_has_next(&lit)){ 3678 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3679 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3680 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3681 hci_shutdown_connection(connection); 3682 } 3683 3684 hci_power_control(HCI_POWER_OFF); 3685 3686 #ifdef HAVE_MALLOC 3687 free(hci_stack); 3688 #endif 3689 hci_stack = NULL; 3690 } 3691 3692 #ifdef HAVE_SCO_TRANSPORT 3693 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3694 hci_stack->sco_transport = sco_transport; 3695 sco_transport->register_packet_handler(&packet_handler); 3696 } 3697 #endif 3698 3699 #ifdef ENABLE_CLASSIC 3700 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3701 // validate ranage and set 3702 if (encryption_key_size < 7) return; 3703 if (encryption_key_size > 16) return; 3704 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3705 } 3706 3707 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3708 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3709 hci_stack->gap_security_mode = security_mode; 3710 return ERROR_CODE_SUCCESS; 3711 } else { 3712 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3713 } 3714 } 3715 3716 gap_security_mode_t gap_get_security_mode(void){ 3717 return hci_stack->gap_security_mode; 3718 } 3719 3720 void gap_set_security_level(gap_security_level_t security_level){ 3721 hci_stack->gap_security_level = security_level; 3722 } 3723 3724 gap_security_level_t gap_get_security_level(void){ 3725 if (hci_stack->gap_secure_connections_only_mode){ 3726 return LEVEL_4; 3727 } 3728 return hci_stack->gap_security_level; 3729 } 3730 3731 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3732 hci_stack->gap_minimal_service_security_level = security_level; 3733 } 3734 3735 void gap_set_secure_connections_only_mode(bool enable){ 3736 hci_stack->gap_secure_connections_only_mode = enable; 3737 } 3738 3739 bool gap_get_secure_connections_only_mode(void){ 3740 return hci_stack->gap_secure_connections_only_mode; 3741 } 3742 #endif 3743 3744 #ifdef ENABLE_CLASSIC 3745 void gap_set_class_of_device(uint32_t class_of_device){ 3746 hci_stack->class_of_device = class_of_device; 3747 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3748 hci_run(); 3749 } 3750 3751 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3752 hci_stack->default_link_policy_settings = default_link_policy_settings; 3753 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3754 hci_run(); 3755 } 3756 3757 void gap_set_allow_role_switch(bool allow_role_switch){ 3758 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3759 } 3760 3761 uint8_t hci_get_allow_role_switch(void){ 3762 return hci_stack->allow_role_switch; 3763 } 3764 3765 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3766 hci_stack->link_supervision_timeout = link_supervision_timeout; 3767 } 3768 3769 void hci_disable_l2cap_timeout_check(void){ 3770 disable_l2cap_timeouts = 1; 3771 } 3772 #endif 3773 3774 #ifndef HAVE_HOST_CONTROLLER_API 3775 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3776 void hci_set_bd_addr(bd_addr_t addr){ 3777 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3778 hci_stack->custom_bd_addr_set = 1; 3779 } 3780 #endif 3781 3782 // State-Module-Driver overview 3783 // state module low-level 3784 // HCI_STATE_OFF off close 3785 // HCI_STATE_INITIALIZING, on open 3786 // HCI_STATE_WORKING, on open 3787 // HCI_STATE_HALTING, on open 3788 // HCI_STATE_SLEEPING, off/sleep close 3789 // HCI_STATE_FALLING_ASLEEP on open 3790 3791 static int hci_power_control_on(void){ 3792 3793 // power on 3794 int err = 0; 3795 if (hci_stack->control && hci_stack->control->on){ 3796 err = (*hci_stack->control->on)(); 3797 } 3798 if (err){ 3799 log_error( "POWER_ON failed"); 3800 hci_emit_hci_open_failed(); 3801 return err; 3802 } 3803 3804 // int chipset driver 3805 if (hci_stack->chipset && hci_stack->chipset->init){ 3806 hci_stack->chipset->init(hci_stack->config); 3807 } 3808 3809 // init transport 3810 if (hci_stack->hci_transport->init){ 3811 hci_stack->hci_transport->init(hci_stack->config); 3812 } 3813 3814 // open transport 3815 err = hci_stack->hci_transport->open(); 3816 if (err){ 3817 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3818 if (hci_stack->control && hci_stack->control->off){ 3819 (*hci_stack->control->off)(); 3820 } 3821 hci_emit_hci_open_failed(); 3822 return err; 3823 } 3824 return 0; 3825 } 3826 3827 static void hci_power_control_off(void){ 3828 3829 log_info("hci_power_control_off"); 3830 3831 // close low-level device 3832 hci_stack->hci_transport->close(); 3833 3834 log_info("hci_power_control_off - hci_transport closed"); 3835 3836 // power off 3837 if (hci_stack->control && hci_stack->control->off){ 3838 (*hci_stack->control->off)(); 3839 } 3840 3841 log_info("hci_power_control_off - control closed"); 3842 3843 hci_stack->state = HCI_STATE_OFF; 3844 } 3845 3846 static void hci_power_control_sleep(void){ 3847 3848 log_info("hci_power_control_sleep"); 3849 3850 #if 0 3851 // don't close serial port during sleep 3852 3853 // close low-level device 3854 hci_stack->hci_transport->close(hci_stack->config); 3855 #endif 3856 3857 // sleep mode 3858 if (hci_stack->control && hci_stack->control->sleep){ 3859 (*hci_stack->control->sleep)(); 3860 } 3861 3862 hci_stack->state = HCI_STATE_SLEEPING; 3863 } 3864 3865 static int hci_power_control_wake(void){ 3866 3867 log_info("hci_power_control_wake"); 3868 3869 // wake on 3870 if (hci_stack->control && hci_stack->control->wake){ 3871 (*hci_stack->control->wake)(); 3872 } 3873 3874 #if 0 3875 // open low-level device 3876 int err = hci_stack->hci_transport->open(hci_stack->config); 3877 if (err){ 3878 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3879 if (hci_stack->control && hci_stack->control->off){ 3880 (*hci_stack->control->off)(); 3881 } 3882 hci_emit_hci_open_failed(); 3883 return err; 3884 } 3885 #endif 3886 3887 return 0; 3888 } 3889 3890 static void hci_power_transition_to_initializing(void){ 3891 // set up state machine 3892 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3893 hci_stack->hci_packet_buffer_reserved = false; 3894 hci_stack->state = HCI_STATE_INITIALIZING; 3895 hci_stack->substate = HCI_INIT_SEND_RESET; 3896 } 3897 3898 // returns error 3899 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3900 int err; 3901 switch (power_mode){ 3902 case HCI_POWER_ON: 3903 err = hci_power_control_on(); 3904 if (err != 0) { 3905 log_error("hci_power_control_on() error %d", err); 3906 return err; 3907 } 3908 hci_power_transition_to_initializing(); 3909 break; 3910 case HCI_POWER_OFF: 3911 // do nothing 3912 break; 3913 case HCI_POWER_SLEEP: 3914 // do nothing (with SLEEP == OFF) 3915 break; 3916 default: 3917 btstack_assert(false); 3918 break; 3919 } 3920 return ERROR_CODE_SUCCESS; 3921 } 3922 3923 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3924 switch (power_mode){ 3925 case HCI_POWER_ON: 3926 // do nothing 3927 break; 3928 case HCI_POWER_OFF: 3929 // no connections yet, just turn it off 3930 hci_power_control_off(); 3931 break; 3932 case HCI_POWER_SLEEP: 3933 // no connections yet, just turn it off 3934 hci_power_control_sleep(); 3935 break; 3936 default: 3937 btstack_assert(false); 3938 break; 3939 } 3940 return ERROR_CODE_SUCCESS; 3941 } 3942 3943 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3944 switch (power_mode){ 3945 case HCI_POWER_ON: 3946 // do nothing 3947 break; 3948 case HCI_POWER_OFF: 3949 // see hci_run 3950 hci_stack->state = HCI_STATE_HALTING; 3951 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3952 break; 3953 case HCI_POWER_SLEEP: 3954 // see hci_run 3955 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3956 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3957 break; 3958 default: 3959 btstack_assert(false); 3960 break; 3961 } 3962 return ERROR_CODE_SUCCESS; 3963 } 3964 3965 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3966 switch (power_mode){ 3967 case HCI_POWER_ON: 3968 hci_power_transition_to_initializing(); 3969 break; 3970 case HCI_POWER_OFF: 3971 // do nothing 3972 break; 3973 case HCI_POWER_SLEEP: 3974 // see hci_run 3975 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3976 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3977 break; 3978 default: 3979 btstack_assert(false); 3980 break; 3981 } 3982 return ERROR_CODE_SUCCESS; 3983 } 3984 3985 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3986 switch (power_mode){ 3987 case HCI_POWER_ON: 3988 hci_power_transition_to_initializing(); 3989 break; 3990 case HCI_POWER_OFF: 3991 // see hci_run 3992 hci_stack->state = HCI_STATE_HALTING; 3993 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3994 break; 3995 case HCI_POWER_SLEEP: 3996 // do nothing 3997 break; 3998 default: 3999 btstack_assert(false); 4000 break; 4001 } 4002 return ERROR_CODE_SUCCESS; 4003 } 4004 4005 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4006 int err; 4007 switch (power_mode){ 4008 case HCI_POWER_ON: 4009 err = hci_power_control_wake(); 4010 if (err) return err; 4011 hci_power_transition_to_initializing(); 4012 break; 4013 case HCI_POWER_OFF: 4014 hci_stack->state = HCI_STATE_HALTING; 4015 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4016 break; 4017 case HCI_POWER_SLEEP: 4018 // do nothing 4019 break; 4020 default: 4021 btstack_assert(false); 4022 break; 4023 } 4024 return ERROR_CODE_SUCCESS; 4025 } 4026 4027 int hci_power_control(HCI_POWER_MODE power_mode){ 4028 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4029 int err = 0; 4030 switch (hci_stack->state){ 4031 case HCI_STATE_OFF: 4032 err = hci_power_control_state_off(power_mode); 4033 break; 4034 case HCI_STATE_INITIALIZING: 4035 err = hci_power_control_state_initializing(power_mode); 4036 break; 4037 case HCI_STATE_WORKING: 4038 err = hci_power_control_state_working(power_mode); 4039 break; 4040 case HCI_STATE_HALTING: 4041 err = hci_power_control_state_halting(power_mode); 4042 break; 4043 case HCI_STATE_FALLING_ASLEEP: 4044 err = hci_power_control_state_falling_asleep(power_mode); 4045 break; 4046 case HCI_STATE_SLEEPING: 4047 err = hci_power_control_state_sleeping(power_mode); 4048 break; 4049 default: 4050 btstack_assert(false); 4051 break; 4052 } 4053 if (err != 0){ 4054 return err; 4055 } 4056 4057 // create internal event 4058 hci_emit_state(); 4059 4060 // trigger next/first action 4061 hci_run(); 4062 4063 return 0; 4064 } 4065 4066 4067 #ifdef ENABLE_CLASSIC 4068 4069 static void hci_update_scan_enable(void){ 4070 // 2 = page scan, 1 = inq scan 4071 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4072 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4073 hci_run(); 4074 } 4075 4076 void gap_discoverable_control(uint8_t enable){ 4077 if (enable) enable = 1; // normalize argument 4078 4079 if (hci_stack->discoverable == enable){ 4080 hci_emit_discoverable_enabled(hci_stack->discoverable); 4081 return; 4082 } 4083 4084 hci_stack->discoverable = enable; 4085 hci_update_scan_enable(); 4086 } 4087 4088 void gap_connectable_control(uint8_t enable){ 4089 if (enable) enable = 1; // normalize argument 4090 4091 // don't emit event 4092 if (hci_stack->connectable == enable) return; 4093 4094 hci_stack->connectable = enable; 4095 hci_update_scan_enable(); 4096 } 4097 #endif 4098 4099 void gap_local_bd_addr(bd_addr_t address_buffer){ 4100 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4101 } 4102 4103 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4104 static void hci_host_num_completed_packets(void){ 4105 4106 // create packet manually as arrays are not supported and num_commands should not get reduced 4107 hci_reserve_packet_buffer(); 4108 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4109 4110 uint16_t size = 0; 4111 uint16_t num_handles = 0; 4112 packet[size++] = 0x35; 4113 packet[size++] = 0x0c; 4114 size++; // skip param len 4115 size++; // skip num handles 4116 4117 // add { handle, packets } entries 4118 btstack_linked_item_t * it; 4119 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4120 hci_connection_t * connection = (hci_connection_t *) it; 4121 if (connection->num_packets_completed){ 4122 little_endian_store_16(packet, size, connection->con_handle); 4123 size += 2; 4124 little_endian_store_16(packet, size, connection->num_packets_completed); 4125 size += 2; 4126 // 4127 num_handles++; 4128 connection->num_packets_completed = 0; 4129 } 4130 } 4131 4132 packet[2] = size - 3; 4133 packet[3] = num_handles; 4134 4135 hci_stack->host_completed_packets = 0; 4136 4137 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4138 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4139 4140 // release packet buffer for synchronous transport implementations 4141 if (hci_transport_synchronous()){ 4142 hci_release_packet_buffer(); 4143 hci_emit_transport_packet_sent(); 4144 } 4145 } 4146 #endif 4147 4148 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4149 UNUSED(ds); 4150 hci_stack->substate = HCI_HALTING_CLOSE; 4151 // allow packet handlers to defer final shutdown 4152 hci_emit_state(); 4153 hci_run(); 4154 } 4155 4156 static bool hci_run_acl_fragments(void){ 4157 if (hci_stack->acl_fragmentation_total_size > 0u) { 4158 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4159 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4160 if (connection) { 4161 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4162 hci_send_acl_packet_fragments(connection); 4163 return true; 4164 } 4165 } else { 4166 // connection gone -> discard further fragments 4167 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4168 hci_stack->acl_fragmentation_total_size = 0; 4169 hci_stack->acl_fragmentation_pos = 0; 4170 } 4171 } 4172 return false; 4173 } 4174 4175 #ifdef ENABLE_CLASSIC 4176 static bool hci_run_general_gap_classic(void){ 4177 4178 // assert stack is working and classic is active 4179 if (hci_classic_supported() == false) return false; 4180 if (hci_stack->state != HCI_STATE_WORKING) return false; 4181 4182 // decline incoming connections 4183 if (hci_stack->decline_reason){ 4184 uint8_t reason = hci_stack->decline_reason; 4185 hci_stack->decline_reason = 0; 4186 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4187 return true; 4188 } 4189 4190 if (hci_stack->gap_tasks != 0){ 4191 hci_run_gap_tasks_classic(); 4192 return true; 4193 } 4194 4195 // start/stop inquiry 4196 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4197 uint8_t duration = hci_stack->inquiry_state; 4198 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4199 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4200 return true; 4201 } 4202 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4203 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4204 hci_send_cmd(&hci_inquiry_cancel); 4205 return true; 4206 } 4207 // remote name request 4208 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4209 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4210 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4211 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4212 return true; 4213 } 4214 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4215 // Local OOB data 4216 if (hci_stack->classic_read_local_oob_data){ 4217 hci_stack->classic_read_local_oob_data = false; 4218 if (hci_stack->local_supported_commands[1] & 0x10u){ 4219 hci_send_cmd(&hci_read_local_extended_oob_data); 4220 } else { 4221 hci_send_cmd(&hci_read_local_oob_data); 4222 } 4223 } 4224 #endif 4225 // pairing 4226 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4227 uint8_t state = hci_stack->gap_pairing_state; 4228 uint8_t pin_code[16]; 4229 switch (state){ 4230 case GAP_PAIRING_STATE_SEND_PIN: 4231 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4232 memset(pin_code, 0, 16); 4233 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4234 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4235 break; 4236 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4237 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4238 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4239 break; 4240 case GAP_PAIRING_STATE_SEND_PASSKEY: 4241 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4242 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4243 break; 4244 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4245 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4246 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4247 break; 4248 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4249 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4250 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4251 break; 4252 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4253 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4254 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4255 break; 4256 default: 4257 break; 4258 } 4259 return true; 4260 } 4261 return false; 4262 } 4263 #endif 4264 4265 #ifdef ENABLE_BLE 4266 static bool hci_run_general_gap_le(void){ 4267 4268 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4269 4270 if (hci_stack->state != HCI_STATE_WORKING) return false; 4271 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4272 4273 4274 // Phase 1: collect what to stop 4275 4276 bool scanning_stop = false; 4277 bool connecting_stop = false; 4278 bool advertising_stop = false; 4279 4280 #ifndef ENABLE_LE_CENTRAL 4281 UNUSED(scanning_stop); 4282 UNUSED(connecting_stop); 4283 #endif 4284 #ifndef ENABLE_LE_PERIPHERAL 4285 UNUSED(advertising_stop); 4286 #endif 4287 4288 // check if whitelist needs modification 4289 bool whitelist_modification_pending = false; 4290 btstack_linked_list_iterator_t lit; 4291 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4292 while (btstack_linked_list_iterator_has_next(&lit)){ 4293 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4294 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4295 whitelist_modification_pending = true; 4296 break; 4297 } 4298 } 4299 // check if resolving list needs modification 4300 bool resolving_list_modification_pending = false; 4301 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4302 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4303 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4304 resolving_list_modification_pending = true; 4305 } 4306 #endif 4307 4308 #ifdef ENABLE_LE_CENTRAL 4309 // scanning control 4310 if (hci_stack->le_scanning_active) { 4311 // stop if: 4312 // - parameter change required 4313 // - it's disabled 4314 // - whitelist change required but used for scanning 4315 // - resolving list modified 4316 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4317 if ((hci_stack->le_scanning_param_update) || 4318 !hci_stack->le_scanning_enabled || 4319 scanning_uses_whitelist || 4320 resolving_list_modification_pending){ 4321 4322 scanning_stop = true; 4323 } 4324 } 4325 #endif 4326 4327 #ifdef ENABLE_LE_CENTRAL 4328 // connecting control 4329 bool connecting_with_whitelist; 4330 switch (hci_stack->le_connecting_state){ 4331 case LE_CONNECTING_DIRECT: 4332 case LE_CONNECTING_WHITELIST: 4333 // stop connecting if: 4334 // - connecting uses white and whitelist modification pending 4335 // - if it got disabled 4336 // - resolving list modified 4337 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4338 if ((connecting_with_whitelist && whitelist_modification_pending) || 4339 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4340 resolving_list_modification_pending) { 4341 4342 connecting_stop = true; 4343 } 4344 break; 4345 default: 4346 break; 4347 } 4348 #endif 4349 4350 #ifdef ENABLE_LE_PERIPHERAL 4351 // le advertisement control 4352 if (hci_stack->le_advertisements_active){ 4353 // stop if: 4354 // - parameter change required 4355 // - it's disabled 4356 // - whitelist change required but used for advertisement filter policy 4357 // - resolving list modified 4358 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4359 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4360 if (advertising_change || 4361 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4362 (advertising_uses_whitelist & whitelist_modification_pending) || 4363 resolving_list_modification_pending) { 4364 4365 advertising_stop = true; 4366 } 4367 } 4368 #endif 4369 4370 4371 // Phase 2: stop everything that should be off during modifications 4372 4373 #ifdef ENABLE_LE_CENTRAL 4374 if (scanning_stop){ 4375 hci_stack->le_scanning_active = false; 4376 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4377 return true; 4378 } 4379 #endif 4380 4381 #ifdef ENABLE_LE_CENTRAL 4382 if (connecting_stop){ 4383 hci_send_cmd(&hci_le_create_connection_cancel); 4384 return true; 4385 } 4386 #endif 4387 4388 #ifdef ENABLE_LE_PERIPHERAL 4389 if (advertising_stop){ 4390 hci_stack->le_advertisements_active = false; 4391 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4392 return true; 4393 } 4394 #endif 4395 4396 // Phase 3: modify 4397 4398 #ifdef ENABLE_LE_CENTRAL 4399 if (hci_stack->le_scanning_param_update){ 4400 hci_stack->le_scanning_param_update = false; 4401 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4402 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4403 return true; 4404 } 4405 #endif 4406 4407 #ifdef ENABLE_LE_PERIPHERAL 4408 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4409 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4410 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4411 hci_send_cmd(&hci_le_set_advertising_parameters, 4412 hci_stack->le_advertisements_interval_min, 4413 hci_stack->le_advertisements_interval_max, 4414 hci_stack->le_advertisements_type, 4415 hci_stack->le_advertisements_own_addr_type, 4416 hci_stack->le_advertisements_direct_address_type, 4417 hci_stack->le_advertisements_direct_address, 4418 hci_stack->le_advertisements_channel_map, 4419 hci_stack->le_advertisements_filter_policy); 4420 return true; 4421 } 4422 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4423 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4424 uint8_t adv_data_clean[31]; 4425 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4426 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4427 hci_stack->le_advertisements_data_len); 4428 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4429 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4430 return true; 4431 } 4432 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4433 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4434 uint8_t scan_data_clean[31]; 4435 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4436 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4437 hci_stack->le_scan_response_data_len); 4438 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4439 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4440 return true; 4441 } 4442 #endif 4443 4444 4445 #ifdef ENABLE_LE_CENTRAL 4446 // if connect with whitelist was active and is not cancelled yet, wait until next time 4447 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4448 #endif 4449 4450 // LE Whitelist Management 4451 if (whitelist_modification_pending){ 4452 // add/remove entries 4453 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4454 while (btstack_linked_list_iterator_has_next(&lit)){ 4455 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4456 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4457 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4458 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4459 return true; 4460 } 4461 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4462 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4463 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4464 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4465 return true; 4466 } 4467 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4468 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4469 btstack_memory_whitelist_entry_free(entry); 4470 } 4471 } 4472 } 4473 4474 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4475 // LE Resolving List Management 4476 if (resolving_list_supported) { 4477 uint16_t i; 4478 switch (hci_stack->le_resolving_list_state) { 4479 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4480 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4481 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4482 return true; 4483 case LE_RESOLVING_LIST_READ_SIZE: 4484 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4485 hci_send_cmd(&hci_le_read_resolving_list_size); 4486 return true; 4487 case LE_RESOLVING_LIST_SEND_CLEAR: 4488 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4489 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4490 sizeof(hci_stack->le_resolving_list_add_entries)); 4491 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4492 sizeof(hci_stack->le_resolving_list_remove_entries)); 4493 hci_send_cmd(&hci_le_clear_resolving_list); 4494 return true; 4495 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4496 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4497 uint8_t offset = i >> 3; 4498 uint8_t mask = 1 << (i & 7); 4499 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4500 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4501 bd_addr_t peer_identity_addreses; 4502 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4503 sm_key_t peer_irk; 4504 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4505 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4506 4507 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4508 // trigger whitelist entry 'update' (work around for controller bug) 4509 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4510 while (btstack_linked_list_iterator_has_next(&lit)) { 4511 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4512 if (entry->address_type != peer_identity_addr_type) continue; 4513 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4514 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4515 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4516 } 4517 #endif 4518 4519 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4520 peer_identity_addreses); 4521 return true; 4522 } 4523 4524 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4525 4526 /* fall through */ 4527 4528 case LE_RESOLVING_LIST_ADD_ENTRIES: 4529 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4530 uint8_t offset = i >> 3; 4531 uint8_t mask = 1 << (i & 7); 4532 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4533 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4534 bd_addr_t peer_identity_addreses; 4535 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4536 sm_key_t peer_irk; 4537 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4538 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4539 const uint8_t *local_irk = gap_get_persistent_irk(); 4540 // command uses format specifier 'P' that stores 16-byte value without flip 4541 uint8_t local_irk_flipped[16]; 4542 uint8_t peer_irk_flipped[16]; 4543 reverse_128(local_irk, local_irk_flipped); 4544 reverse_128(peer_irk, peer_irk_flipped); 4545 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4546 peer_irk_flipped, local_irk_flipped); 4547 return true; 4548 } 4549 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4550 break; 4551 4552 default: 4553 break; 4554 } 4555 } 4556 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4557 #endif 4558 4559 // Phase 4: restore state 4560 4561 #ifdef ENABLE_LE_CENTRAL 4562 // re-start scanning 4563 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4564 hci_stack->le_scanning_active = true; 4565 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4566 return true; 4567 } 4568 #endif 4569 4570 #ifdef ENABLE_LE_CENTRAL 4571 // re-start connecting 4572 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4573 bd_addr_t null_addr; 4574 memset(null_addr, 0, 6); 4575 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4576 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4577 hci_send_cmd(&hci_le_create_connection, 4578 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4579 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4580 1, // use whitelist 4581 0, // peer address type 4582 null_addr, // peer bd addr 4583 hci_stack->le_connection_own_addr_type, // our addr type: 4584 hci_stack->le_connection_interval_min, // conn interval min 4585 hci_stack->le_connection_interval_max, // conn interval max 4586 hci_stack->le_connection_latency, // conn latency 4587 hci_stack->le_supervision_timeout, // conn latency 4588 hci_stack->le_minimum_ce_length, // min ce length 4589 hci_stack->le_maximum_ce_length // max ce length 4590 ); 4591 return true; 4592 } 4593 #endif 4594 4595 #ifdef ENABLE_LE_PERIPHERAL 4596 // re-start advertising 4597 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4598 // check if advertisements should be enabled given 4599 hci_stack->le_advertisements_active = true; 4600 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4601 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4602 return true; 4603 } 4604 #endif 4605 4606 return false; 4607 } 4608 #endif 4609 4610 static bool hci_run_general_pending_commands(void){ 4611 btstack_linked_item_t * it; 4612 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4613 hci_connection_t * connection = (hci_connection_t *) it; 4614 4615 switch(connection->state){ 4616 case SEND_CREATE_CONNECTION: 4617 switch(connection->address_type){ 4618 #ifdef ENABLE_CLASSIC 4619 case BD_ADDR_TYPE_ACL: 4620 log_info("sending hci_create_connection"); 4621 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4622 break; 4623 #endif 4624 default: 4625 #ifdef ENABLE_BLE 4626 #ifdef ENABLE_LE_CENTRAL 4627 log_info("sending hci_le_create_connection"); 4628 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4629 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4630 hci_send_cmd(&hci_le_create_connection, 4631 hci_stack->le_connection_scan_interval, // conn scan interval 4632 hci_stack->le_connection_scan_window, // conn scan windows 4633 0, // don't use whitelist 4634 connection->address_type, // peer address type 4635 connection->address, // peer bd addr 4636 hci_stack->le_connection_own_addr_type, // our addr type: 4637 hci_stack->le_connection_interval_min, // conn interval min 4638 hci_stack->le_connection_interval_max, // conn interval max 4639 hci_stack->le_connection_latency, // conn latency 4640 hci_stack->le_supervision_timeout, // conn latency 4641 hci_stack->le_minimum_ce_length, // min ce length 4642 hci_stack->le_maximum_ce_length // max ce length 4643 ); 4644 connection->state = SENT_CREATE_CONNECTION; 4645 #endif 4646 #endif 4647 break; 4648 } 4649 return true; 4650 4651 #ifdef ENABLE_CLASSIC 4652 case RECEIVED_CONNECTION_REQUEST: 4653 connection->role = HCI_ROLE_SLAVE; 4654 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4655 log_info("sending hci_accept_connection_request"); 4656 connection->state = ACCEPTED_CONNECTION_REQUEST; 4657 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4658 } 4659 return true; 4660 #endif 4661 4662 #ifdef ENABLE_BLE 4663 #ifdef ENABLE_LE_CENTRAL 4664 case SEND_CANCEL_CONNECTION: 4665 connection->state = SENT_CANCEL_CONNECTION; 4666 hci_send_cmd(&hci_le_create_connection_cancel); 4667 return true; 4668 #endif 4669 #endif 4670 case SEND_DISCONNECT: 4671 connection->state = SENT_DISCONNECT; 4672 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4673 return true; 4674 4675 default: 4676 break; 4677 } 4678 4679 // no further commands if connection is about to get shut down 4680 if (connection->state == SENT_DISCONNECT) continue; 4681 4682 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4683 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4684 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4685 return true; 4686 } 4687 4688 #ifdef ENABLE_CLASSIC 4689 4690 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4691 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4692 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4693 return true; 4694 } 4695 4696 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4697 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4698 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4699 return true; 4700 } 4701 4702 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4703 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4704 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4705 return true; 4706 } 4707 4708 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4709 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4710 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4711 return true; 4712 } 4713 4714 // Handling link key request requires remote supported features 4715 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4716 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4717 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4718 4719 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4720 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4721 if (have_link_key && security_level_sufficient){ 4722 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4723 } else { 4724 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4725 } 4726 return true; 4727 } 4728 4729 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4730 log_info("denying to pin request"); 4731 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4732 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4733 return true; 4734 } 4735 4736 // security assessment requires remote features 4737 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4738 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4739 hci_ssp_assess_security_on_io_cap_request(connection); 4740 // 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 4741 } 4742 4743 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4744 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4745 // set authentication requirements: 4746 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4747 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4748 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4749 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4750 authreq |= 1; 4751 } 4752 bool bonding = hci_stack->bondable; 4753 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4754 // if we have received IO Cap Response, we're in responder role 4755 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4756 if (bonding && !remote_bonding){ 4757 log_info("Remote not bonding, dropping local flag"); 4758 bonding = false; 4759 } 4760 } 4761 if (bonding){ 4762 if (connection->bonding_flags & BONDING_DEDICATED){ 4763 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4764 } else { 4765 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4766 } 4767 } 4768 uint8_t have_oob_data = 0; 4769 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4770 if (connection->classic_oob_c_192 != NULL){ 4771 have_oob_data |= 1; 4772 } 4773 if (connection->classic_oob_c_256 != NULL){ 4774 have_oob_data |= 2; 4775 } 4776 #endif 4777 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4778 return true; 4779 } 4780 4781 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4782 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4783 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4784 return true; 4785 } 4786 4787 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4788 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4789 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4790 const uint8_t zero[16] = { 0 }; 4791 const uint8_t * r_192 = zero; 4792 const uint8_t * c_192 = zero; 4793 const uint8_t * r_256 = zero; 4794 const uint8_t * c_256 = zero; 4795 // verify P-256 OOB 4796 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4797 c_256 = connection->classic_oob_c_256; 4798 if (connection->classic_oob_r_256 != NULL) { 4799 r_256 = connection->classic_oob_r_256; 4800 } 4801 } 4802 // verify P-192 OOB 4803 if ((connection->classic_oob_c_192 != NULL)) { 4804 c_192 = connection->classic_oob_c_192; 4805 if (connection->classic_oob_r_192 != NULL) { 4806 r_192 = connection->classic_oob_r_192; 4807 } 4808 } 4809 4810 // assess security 4811 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4812 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4813 if (need_level_4 && !can_reach_level_4){ 4814 log_info("Level 4 required, but not possible -> abort"); 4815 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4816 // send oob negative reply 4817 c_256 = NULL; 4818 c_192 = NULL; 4819 } 4820 4821 // Reply 4822 if (c_256 != zero) { 4823 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4824 } else if (c_192 != zero){ 4825 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4826 } else { 4827 hci_stack->classic_oob_con_handle = connection->con_handle; 4828 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4829 } 4830 return true; 4831 } 4832 #endif 4833 4834 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4835 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4836 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4837 return true; 4838 } 4839 4840 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4841 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4842 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4843 return true; 4844 } 4845 4846 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4847 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4848 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4849 return true; 4850 } 4851 4852 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4853 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4854 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4855 connection->state = SENT_DISCONNECT; 4856 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4857 return true; 4858 } 4859 4860 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4861 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4862 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4863 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4864 return true; 4865 } 4866 4867 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4868 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4869 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4870 return true; 4871 } 4872 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4873 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4874 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4875 return true; 4876 } 4877 #endif 4878 4879 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4880 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4881 #ifdef ENABLE_CLASSIC 4882 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4883 #endif 4884 if (connection->state != SENT_DISCONNECT){ 4885 connection->state = SENT_DISCONNECT; 4886 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4887 return true; 4888 } 4889 } 4890 4891 #ifdef ENABLE_CLASSIC 4892 uint16_t sniff_min_interval; 4893 switch (connection->sniff_min_interval){ 4894 case 0: 4895 break; 4896 case 0xffff: 4897 connection->sniff_min_interval = 0; 4898 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4899 return true; 4900 default: 4901 sniff_min_interval = connection->sniff_min_interval; 4902 connection->sniff_min_interval = 0; 4903 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4904 return true; 4905 } 4906 4907 if (connection->sniff_subrating_max_latency != 0xffff){ 4908 uint16_t max_latency = connection->sniff_subrating_max_latency; 4909 connection->sniff_subrating_max_latency = 0; 4910 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4911 return true; 4912 } 4913 4914 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4915 uint8_t service_type = (uint8_t) connection->qos_service_type; 4916 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4917 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); 4918 return true; 4919 } 4920 4921 if (connection->request_role != HCI_ROLE_INVALID){ 4922 hci_role_t role = connection->request_role; 4923 connection->request_role = HCI_ROLE_INVALID; 4924 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4925 return true; 4926 } 4927 #endif 4928 4929 #ifdef ENABLE_BLE 4930 switch (connection->le_con_parameter_update_state){ 4931 // response to L2CAP CON PARAMETER UPDATE REQUEST 4932 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4933 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4934 hci_send_cmd(&hci_le_connection_update, 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_REPLY: 4939 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4940 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4941 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4942 0x0000, 0xffff); 4943 return true; 4944 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4945 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4946 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4947 return true; 4948 default: 4949 break; 4950 } 4951 if (connection->le_phy_update_all_phys != 0xffu){ 4952 uint8_t all_phys = connection->le_phy_update_all_phys; 4953 connection->le_phy_update_all_phys = 0xff; 4954 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); 4955 return true; 4956 } 4957 #endif 4958 } 4959 return false; 4960 } 4961 4962 static void hci_run(void){ 4963 4964 bool done; 4965 4966 // send continuation fragments first, as they block the prepared packet buffer 4967 done = hci_run_acl_fragments(); 4968 if (done) return; 4969 4970 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4971 // send host num completed packets next as they don't require num_cmd_packets > 0 4972 if (!hci_can_send_comand_packet_transport()) return; 4973 if (hci_stack->host_completed_packets){ 4974 hci_host_num_completed_packets(); 4975 return; 4976 } 4977 #endif 4978 4979 if (!hci_can_send_command_packet_now()) return; 4980 4981 // global/non-connection oriented commands 4982 4983 4984 #ifdef ENABLE_CLASSIC 4985 // general gap classic 4986 done = hci_run_general_gap_classic(); 4987 if (done) return; 4988 #endif 4989 4990 #ifdef ENABLE_BLE 4991 // general gap le 4992 done = hci_run_general_gap_le(); 4993 if (done) return; 4994 #endif 4995 4996 // send pending HCI commands 4997 done = hci_run_general_pending_commands(); 4998 if (done) return; 4999 5000 // stack state sub statemachines 5001 hci_connection_t * connection; 5002 switch (hci_stack->state){ 5003 case HCI_STATE_INITIALIZING: 5004 hci_initializing_run(); 5005 break; 5006 5007 case HCI_STATE_HALTING: 5008 5009 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5010 switch (hci_stack->substate){ 5011 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5012 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5013 5014 #ifdef ENABLE_BLE 5015 #ifdef ENABLE_LE_CENTRAL 5016 // free whitelist entries 5017 { 5018 btstack_linked_list_iterator_t lit; 5019 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5020 while (btstack_linked_list_iterator_has_next(&lit)){ 5021 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5022 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5023 btstack_memory_whitelist_entry_free(entry); 5024 } 5025 } 5026 #endif 5027 #endif 5028 // close all open connections 5029 connection = (hci_connection_t *) hci_stack->connections; 5030 if (connection){ 5031 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5032 if (!hci_can_send_command_packet_now()) return; 5033 5034 // check state 5035 if (connection->state == SENT_DISCONNECT) return; 5036 connection->state = SENT_DISCONNECT; 5037 5038 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5039 5040 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5041 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5042 5043 // ... which would be ignored anyway as we shutdown (free) the connection now 5044 hci_shutdown_connection(connection); 5045 5046 // finally, send the disconnect command 5047 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5048 return; 5049 } 5050 5051 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5052 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5053 log_info("HCI_STATE_HALTING: wait 50 ms"); 5054 hci_stack->substate = HCI_HALTING_W4_TIMER; 5055 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5056 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5057 btstack_run_loop_add_timer(&hci_stack->timeout); 5058 break; 5059 } 5060 5061 /* fall through */ 5062 5063 case HCI_HALTING_CLOSE: 5064 log_info("HCI_STATE_HALTING, calling off"); 5065 5066 // switch mode 5067 hci_power_control_off(); 5068 5069 log_info("HCI_STATE_HALTING, emitting state"); 5070 hci_emit_state(); 5071 log_info("HCI_STATE_HALTING, done"); 5072 break; 5073 5074 case HCI_HALTING_W4_TIMER: 5075 // keep waiting 5076 5077 break; 5078 default: 5079 break; 5080 } 5081 5082 break; 5083 5084 case HCI_STATE_FALLING_ASLEEP: 5085 switch(hci_stack->substate) { 5086 case HCI_FALLING_ASLEEP_DISCONNECT: 5087 log_info("HCI_STATE_FALLING_ASLEEP"); 5088 // close all open connections 5089 connection = (hci_connection_t *) hci_stack->connections; 5090 if (connection){ 5091 5092 // send disconnect 5093 if (!hci_can_send_command_packet_now()) return; 5094 5095 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5096 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5097 5098 // send disconnected event right away - causes higher layer connections to get closed, too. 5099 hci_shutdown_connection(connection); 5100 return; 5101 } 5102 5103 if (hci_classic_supported()){ 5104 // disable page and inquiry scan 5105 if (!hci_can_send_command_packet_now()) return; 5106 5107 log_info("HCI_STATE_HALTING, disabling inq scans"); 5108 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5109 5110 // continue in next sub state 5111 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5112 break; 5113 } 5114 5115 /* fall through */ 5116 5117 case HCI_FALLING_ASLEEP_COMPLETE: 5118 log_info("HCI_STATE_HALTING, calling sleep"); 5119 // switch mode 5120 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5121 hci_emit_state(); 5122 break; 5123 5124 default: 5125 break; 5126 } 5127 break; 5128 5129 default: 5130 break; 5131 } 5132 } 5133 5134 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5135 // house-keeping 5136 5137 #ifdef ENABLE_CLASSIC 5138 bd_addr_t addr; 5139 hci_connection_t * conn; 5140 #endif 5141 #ifdef ENABLE_LE_CENTRAL 5142 uint8_t initiator_filter_policy; 5143 #endif 5144 5145 uint16_t opcode = little_endian_read_16(packet, 0); 5146 switch (opcode) { 5147 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5148 hci_stack->loopback_mode = packet[3]; 5149 break; 5150 5151 #ifdef ENABLE_CLASSIC 5152 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5153 reverse_bd_addr(&packet[3], addr); 5154 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5155 5156 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5157 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5158 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5159 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5160 } 5161 5162 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5163 if (!conn) { 5164 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5165 if (!conn) { 5166 // notify client that alloc failed 5167 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5168 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5169 } 5170 conn->state = SEND_CREATE_CONNECTION; 5171 conn->role = HCI_ROLE_MASTER; 5172 } 5173 5174 conn->con_handle = HCI_CON_HANDLE_INVALID; 5175 conn->role = HCI_ROLE_INVALID; 5176 5177 log_info("conn state %u", conn->state); 5178 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5179 switch (conn->state) { 5180 // if connection active exists 5181 case OPEN: 5182 // and OPEN, emit connection complete command 5183 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5184 // packet not sent to controller 5185 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5186 case RECEIVED_DISCONNECTION_COMPLETE: 5187 // create connection triggered in disconnect complete event, let's do it now 5188 break; 5189 case SEND_CREATE_CONNECTION: 5190 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5191 break; 5192 default: 5193 // otherwise, just ignore as it is already in the open process 5194 // packet not sent to controller 5195 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5196 } 5197 conn->state = SENT_CREATE_CONNECTION; 5198 5199 // track outgoing connection 5200 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5201 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5202 break; 5203 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5204 if (hci_stack->link_key_db) { 5205 reverse_bd_addr(&packet[3], addr); 5206 hci_stack->link_key_db->delete_link_key(addr); 5207 } 5208 break; 5209 5210 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5211 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5212 // setup_synchronous_connection? Voice setting at offset 22 5213 // TODO: compare to current setting if sco connection already active 5214 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5215 break; 5216 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5217 // accept_synchronus_connection? Voice setting at offset 18 5218 // TODO: compare to current setting if sco connection already active 5219 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5220 break; 5221 #endif 5222 #endif 5223 5224 #ifdef ENABLE_BLE 5225 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5226 hci_stack->le_random_address_set = 1; 5227 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5228 break; 5229 #ifdef ENABLE_LE_PERIPHERAL 5230 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5231 hci_stack->le_advertisements_active = packet[3] != 0; 5232 break; 5233 #endif 5234 #ifdef ENABLE_LE_CENTRAL 5235 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5236 // white list used? 5237 initiator_filter_policy = packet[7]; 5238 switch (initiator_filter_policy) { 5239 case 0: 5240 // whitelist not used 5241 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5242 break; 5243 case 1: 5244 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5245 break; 5246 default: 5247 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5248 break; 5249 } 5250 // track outgoing connection 5251 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5252 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5253 break; 5254 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5255 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5256 break; 5257 #endif 5258 #endif 5259 default: 5260 break; 5261 } 5262 5263 hci_stack->num_cmd_packets--; 5264 5265 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5266 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5267 if (err != 0){ 5268 return ERROR_CODE_HARDWARE_FAILURE; 5269 } 5270 return ERROR_CODE_SUCCESS; 5271 } 5272 5273 // disconnect because of security block 5274 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5275 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5276 if (!connection) return; 5277 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5278 } 5279 5280 5281 // Configure Secure Simple Pairing 5282 5283 #ifdef ENABLE_CLASSIC 5284 5285 // enable will enable SSP during init 5286 void gap_ssp_set_enable(int enable){ 5287 hci_stack->ssp_enable = enable; 5288 } 5289 5290 static int hci_local_ssp_activated(void){ 5291 return gap_ssp_supported() && hci_stack->ssp_enable; 5292 } 5293 5294 // if set, BTstack will respond to io capability request using authentication requirement 5295 void gap_ssp_set_io_capability(int io_capability){ 5296 hci_stack->ssp_io_capability = io_capability; 5297 } 5298 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5299 hci_stack->ssp_authentication_requirement = authentication_requirement; 5300 } 5301 5302 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5303 void gap_ssp_set_auto_accept(int auto_accept){ 5304 hci_stack->ssp_auto_accept = auto_accept; 5305 } 5306 5307 void gap_secure_connections_enable(bool enable){ 5308 hci_stack->secure_connections_enable = enable; 5309 } 5310 5311 #endif 5312 5313 // va_list part of hci_send_cmd 5314 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5315 if (!hci_can_send_command_packet_now()){ 5316 log_error("hci_send_cmd called but cannot send packet now"); 5317 return ERROR_CODE_COMMAND_DISALLOWED; 5318 } 5319 5320 // for HCI INITIALIZATION 5321 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5322 hci_stack->last_cmd_opcode = cmd->opcode; 5323 5324 hci_reserve_packet_buffer(); 5325 uint8_t * packet = hci_stack->hci_packet_buffer; 5326 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5327 uint8_t status = hci_send_cmd_packet(packet, size); 5328 5329 // release packet buffer on error or for synchronous transport implementations 5330 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5331 hci_release_packet_buffer(); 5332 hci_emit_transport_packet_sent(); 5333 } 5334 5335 return status; 5336 } 5337 5338 /** 5339 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5340 */ 5341 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5342 va_list argptr; 5343 va_start(argptr, cmd); 5344 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5345 va_end(argptr); 5346 return status; 5347 } 5348 5349 // Create various non-HCI events. 5350 // TODO: generalize, use table similar to hci_create_command 5351 5352 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5353 // dump packet 5354 if (dump) { 5355 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5356 } 5357 5358 // dispatch to all event handlers 5359 btstack_linked_list_iterator_t it; 5360 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5361 while (btstack_linked_list_iterator_has_next(&it)){ 5362 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5363 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5364 } 5365 } 5366 5367 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5368 if (!hci_stack->acl_packet_handler) return; 5369 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5370 } 5371 5372 #ifdef ENABLE_CLASSIC 5373 static void hci_notify_if_sco_can_send_now(void){ 5374 // notify SCO sender if waiting 5375 if (!hci_stack->sco_waiting_for_can_send_now) return; 5376 if (hci_can_send_sco_packet_now()){ 5377 hci_stack->sco_waiting_for_can_send_now = 0; 5378 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5379 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5380 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5381 } 5382 } 5383 5384 // parsing end emitting has been merged to reduce code size 5385 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5386 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5387 5388 uint8_t * eir_data; 5389 ad_context_t context; 5390 const uint8_t * name; 5391 uint8_t name_len; 5392 5393 if (size < 3) return; 5394 5395 int event_type = hci_event_packet_get_type(packet); 5396 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5397 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5398 5399 switch (event_type){ 5400 case HCI_EVENT_INQUIRY_RESULT: 5401 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5402 if (size != (3 + (num_responses * 14))) return; 5403 break; 5404 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5405 if (size != 257) return; 5406 if (num_responses != 1) return; 5407 break; 5408 default: 5409 return; 5410 } 5411 5412 // event[1] is set at the end 5413 int i; 5414 for (i=0; i<num_responses;i++){ 5415 memset(event, 0, sizeof(event)); 5416 event[0] = GAP_EVENT_INQUIRY_RESULT; 5417 uint8_t event_size = 27; // if name is not set by EIR 5418 5419 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5420 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5421 (void)memcpy(&event[9], 5422 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5423 3); // class of device 5424 (void)memcpy(&event[12], 5425 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5426 2); // clock offset 5427 5428 switch (event_type){ 5429 case HCI_EVENT_INQUIRY_RESULT: 5430 // 14,15,16,17 = 0, size 18 5431 break; 5432 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5433 event[14] = 1; 5434 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5435 // 16,17 = 0, size 18 5436 break; 5437 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5438 event[14] = 1; 5439 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5440 // EIR packets only contain a single inquiry response 5441 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5442 name = NULL; 5443 // Iterate over EIR data 5444 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5445 uint8_t data_type = ad_iterator_get_data_type(&context); 5446 uint8_t data_size = ad_iterator_get_data_len(&context); 5447 const uint8_t * data = ad_iterator_get_data(&context); 5448 // Prefer Complete Local Name over Shortened Local Name 5449 switch (data_type){ 5450 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5451 if (name) continue; 5452 /* fall through */ 5453 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5454 name = data; 5455 name_len = data_size; 5456 break; 5457 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5458 if (data_size != 8) break; 5459 event[16] = 1; 5460 memcpy(&event[17], data, 8); 5461 break; 5462 default: 5463 break; 5464 } 5465 } 5466 if (name){ 5467 event[25] = 1; 5468 // truncate name if needed 5469 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5470 event[26] = len; 5471 (void)memcpy(&event[27], name, len); 5472 event_size += len; 5473 } 5474 break; 5475 default: 5476 return; 5477 } 5478 event[1] = event_size - 2; 5479 hci_emit_event(event, event_size, 1); 5480 } 5481 } 5482 #endif 5483 5484 void hci_emit_state(void){ 5485 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5486 uint8_t event[3]; 5487 event[0] = BTSTACK_EVENT_STATE; 5488 event[1] = sizeof(event) - 2u; 5489 event[2] = hci_stack->state; 5490 hci_emit_event(event, sizeof(event), 1); 5491 } 5492 5493 #ifdef ENABLE_CLASSIC 5494 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5495 uint8_t event[13]; 5496 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5497 event[1] = sizeof(event) - 2; 5498 event[2] = status; 5499 little_endian_store_16(event, 3, con_handle); 5500 reverse_bd_addr(address, &event[5]); 5501 event[11] = 1; // ACL connection 5502 event[12] = 0; // encryption disabled 5503 hci_emit_event(event, sizeof(event), 1); 5504 } 5505 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5506 if (disable_l2cap_timeouts) return; 5507 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5508 uint8_t event[4]; 5509 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5510 event[1] = sizeof(event) - 2; 5511 little_endian_store_16(event, 2, conn->con_handle); 5512 hci_emit_event(event, sizeof(event), 1); 5513 } 5514 #endif 5515 5516 #ifdef ENABLE_BLE 5517 #ifdef ENABLE_LE_CENTRAL 5518 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){ 5519 uint8_t event[21]; 5520 event[0] = HCI_EVENT_LE_META; 5521 event[1] = sizeof(event) - 2u; 5522 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5523 event[3] = status; 5524 little_endian_store_16(event, 4, con_handle); 5525 event[6] = 0; // TODO: role 5526 event[7] = address_type; 5527 reverse_bd_addr(address, &event[8]); 5528 little_endian_store_16(event, 14, 0); // interval 5529 little_endian_store_16(event, 16, 0); // latency 5530 little_endian_store_16(event, 18, 0); // supervision timeout 5531 event[20] = 0; // master clock accuracy 5532 hci_emit_event(event, sizeof(event), 1); 5533 } 5534 #endif 5535 #endif 5536 5537 static void hci_emit_transport_packet_sent(void){ 5538 // notify upper stack that it might be possible to send again 5539 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5540 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5541 } 5542 5543 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5544 uint8_t event[6]; 5545 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5546 event[1] = sizeof(event) - 2u; 5547 event[2] = 0; // status = OK 5548 little_endian_store_16(event, 3, con_handle); 5549 event[5] = reason; 5550 hci_emit_event(event, sizeof(event), 1); 5551 } 5552 5553 static void hci_emit_nr_connections_changed(void){ 5554 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5555 uint8_t event[3]; 5556 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5557 event[1] = sizeof(event) - 2u; 5558 event[2] = nr_hci_connections(); 5559 hci_emit_event(event, sizeof(event), 1); 5560 } 5561 5562 static void hci_emit_hci_open_failed(void){ 5563 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5564 uint8_t event[2]; 5565 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5566 event[1] = sizeof(event) - 2u; 5567 hci_emit_event(event, sizeof(event), 1); 5568 } 5569 5570 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5571 log_info("hci_emit_dedicated_bonding_result %u ", status); 5572 uint8_t event[9]; 5573 int pos = 0; 5574 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5575 event[pos++] = sizeof(event) - 2u; 5576 event[pos++] = status; 5577 reverse_bd_addr(address, &event[pos]); 5578 hci_emit_event(event, sizeof(event), 1); 5579 } 5580 5581 5582 #ifdef ENABLE_CLASSIC 5583 5584 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5585 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5586 uint8_t event[5]; 5587 int pos = 0; 5588 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5589 event[pos++] = sizeof(event) - 2; 5590 little_endian_store_16(event, 2, con_handle); 5591 pos += 2; 5592 event[pos++] = level; 5593 hci_emit_event(event, sizeof(event), 1); 5594 } 5595 5596 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5597 if (!connection) return LEVEL_0; 5598 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5599 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5600 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5601 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5602 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5603 // LEVEL 4 always requires 128 bit encrytion key size 5604 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5605 security_level = LEVEL_3; 5606 } 5607 return security_level; 5608 } 5609 5610 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5611 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5612 uint8_t event[3]; 5613 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5614 event[1] = sizeof(event) - 2; 5615 event[2] = enabled; 5616 hci_emit_event(event, sizeof(event), 1); 5617 } 5618 5619 // query if remote side supports eSCO 5620 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5621 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5622 if (!connection) return false; 5623 return (connection->remote_supported_features[0] & 1) != 0; 5624 } 5625 5626 static bool hci_ssp_supported(hci_connection_t * connection){ 5627 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5628 return (connection->bonding_flags & mask) == mask; 5629 } 5630 5631 // query if remote side supports SSP 5632 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5633 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5634 if (!connection) return false; 5635 return hci_ssp_supported(connection) ? 1 : 0; 5636 } 5637 5638 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5639 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5640 } 5641 5642 // GAP API 5643 /** 5644 * @bbrief enable/disable bonding. default is enabled 5645 * @praram enabled 5646 */ 5647 void gap_set_bondable_mode(int enable){ 5648 hci_stack->bondable = enable ? 1 : 0; 5649 } 5650 /** 5651 * @brief Get bondable mode. 5652 * @return 1 if bondable 5653 */ 5654 int gap_get_bondable_mode(void){ 5655 return hci_stack->bondable; 5656 } 5657 5658 /** 5659 * @brief map link keys to security levels 5660 */ 5661 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5662 switch (link_key_type){ 5663 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5664 return LEVEL_4; 5665 case COMBINATION_KEY: 5666 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5667 return LEVEL_3; 5668 default: 5669 return LEVEL_2; 5670 } 5671 } 5672 5673 /** 5674 * @brief map link keys to secure connection yes/no 5675 */ 5676 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5677 switch (link_key_type){ 5678 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5679 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5680 return 1; 5681 default: 5682 return 0; 5683 } 5684 } 5685 5686 /** 5687 * @brief map link keys to authenticated 5688 */ 5689 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5690 switch (link_key_type){ 5691 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5692 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5693 return 1; 5694 default: 5695 return 0; 5696 } 5697 } 5698 5699 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5700 log_info("gap_mitm_protection_required_for_security_level %u", level); 5701 return level > LEVEL_2; 5702 } 5703 5704 /** 5705 * @brief get current security level 5706 */ 5707 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5708 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5709 if (!connection) return LEVEL_0; 5710 return gap_security_level_for_connection(connection); 5711 } 5712 5713 /** 5714 * @brief request connection to device to 5715 * @result GAP_AUTHENTICATION_RESULT 5716 */ 5717 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5718 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5719 if (!connection){ 5720 hci_emit_security_level(con_handle, LEVEL_0); 5721 return; 5722 } 5723 5724 btstack_assert(hci_is_le_connection(connection) == false); 5725 5726 // 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) 5727 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5728 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5729 requested_level = LEVEL_4; 5730 } 5731 5732 gap_security_level_t current_level = gap_security_level(con_handle); 5733 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5734 requested_level, connection->requested_security_level, current_level); 5735 5736 // authentication active if authentication request was sent or planned level > 0 5737 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5738 if (authentication_active){ 5739 // authentication already active 5740 if (connection->requested_security_level < requested_level){ 5741 // increase requested level as new level is higher 5742 // TODO: handle re-authentication when done 5743 connection->requested_security_level = requested_level; 5744 } 5745 } else { 5746 // no request active, notify if security sufficient 5747 if (requested_level <= current_level){ 5748 hci_emit_security_level(con_handle, current_level); 5749 return; 5750 } 5751 5752 // store request 5753 connection->requested_security_level = requested_level; 5754 5755 // start to authenticate connection 5756 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5757 hci_run(); 5758 } 5759 } 5760 5761 /** 5762 * @brief start dedicated bonding with device. disconnect after bonding 5763 * @param device 5764 * @param request MITM protection 5765 * @result GAP_DEDICATED_BONDING_COMPLETE 5766 */ 5767 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5768 5769 // create connection state machine 5770 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5771 5772 if (!connection){ 5773 return BTSTACK_MEMORY_ALLOC_FAILED; 5774 } 5775 5776 // delete linkn key 5777 gap_drop_link_key_for_bd_addr(device); 5778 5779 // configure LEVEL_2/3, dedicated bonding 5780 connection->state = SEND_CREATE_CONNECTION; 5781 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5782 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5783 connection->bonding_flags = BONDING_DEDICATED; 5784 5785 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5786 5787 // handle: connnection failure (connection complete != ok) 5788 // handle: authentication failure 5789 // handle: disconnect on done 5790 5791 hci_run(); 5792 5793 return 0; 5794 } 5795 5796 void gap_set_local_name(const char * local_name){ 5797 hci_stack->local_name = local_name; 5798 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5799 // also update EIR if not set by user 5800 if (hci_stack->eir_data == NULL){ 5801 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5802 } 5803 hci_run(); 5804 } 5805 #endif 5806 5807 5808 #ifdef ENABLE_BLE 5809 5810 #ifdef ENABLE_LE_CENTRAL 5811 void gap_start_scan(void){ 5812 hci_stack->le_scanning_enabled = true; 5813 hci_run(); 5814 } 5815 5816 void gap_stop_scan(void){ 5817 hci_stack->le_scanning_enabled = false; 5818 hci_run(); 5819 } 5820 5821 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5822 hci_stack->le_scan_type = scan_type; 5823 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5824 hci_stack->le_scan_interval = scan_interval; 5825 hci_stack->le_scan_window = scan_window; 5826 hci_stack->le_scanning_param_update = true; 5827 hci_run(); 5828 } 5829 5830 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5831 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5832 } 5833 5834 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5835 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5836 if (!conn){ 5837 // disallow if le connection is already outgoing 5838 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5839 log_error("le connection already active"); 5840 return ERROR_CODE_COMMAND_DISALLOWED; 5841 } 5842 5843 log_info("gap_connect: no connection exists yet, creating context"); 5844 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5845 if (!conn){ 5846 // notify client that alloc failed 5847 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5848 log_info("gap_connect: failed to alloc hci_connection_t"); 5849 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5850 } 5851 5852 // set le connecting state 5853 if (hci_is_le_connection_type(addr_type)){ 5854 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5855 } 5856 5857 conn->state = SEND_CREATE_CONNECTION; 5858 log_info("gap_connect: send create connection next"); 5859 hci_run(); 5860 return ERROR_CODE_SUCCESS; 5861 } 5862 5863 if (!hci_is_le_connection(conn) || 5864 (conn->state == SEND_CREATE_CONNECTION) || 5865 (conn->state == SENT_CREATE_CONNECTION)) { 5866 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5867 log_error("gap_connect: classic connection or connect is already being created"); 5868 return GATT_CLIENT_IN_WRONG_STATE; 5869 } 5870 5871 // check if connection was just disconnected 5872 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5873 log_info("gap_connect: send create connection (again)"); 5874 conn->state = SEND_CREATE_CONNECTION; 5875 hci_run(); 5876 return ERROR_CODE_SUCCESS; 5877 } 5878 5879 log_info("gap_connect: context exists with state %u", conn->state); 5880 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5881 hci_run(); 5882 return ERROR_CODE_SUCCESS; 5883 } 5884 5885 // @assumption: only a single outgoing LE Connection exists 5886 static hci_connection_t * gap_get_outgoing_connection(void){ 5887 btstack_linked_item_t *it; 5888 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5889 hci_connection_t * conn = (hci_connection_t *) it; 5890 if (!hci_is_le_connection(conn)) continue; 5891 switch (conn->state){ 5892 case SEND_CREATE_CONNECTION: 5893 case SENT_CREATE_CONNECTION: 5894 case SENT_CANCEL_CONNECTION: 5895 return conn; 5896 default: 5897 break; 5898 }; 5899 } 5900 return NULL; 5901 } 5902 5903 uint8_t gap_connect_cancel(void){ 5904 hci_connection_t * conn = gap_get_outgoing_connection(); 5905 if (!conn) return 0; 5906 switch (conn->state){ 5907 case SEND_CREATE_CONNECTION: 5908 // skip sending create connection and emit event instead 5909 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5910 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5911 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5912 btstack_memory_hci_connection_free( conn ); 5913 break; 5914 case SENT_CREATE_CONNECTION: 5915 // request to send cancel connection 5916 conn->state = SEND_CANCEL_CONNECTION; 5917 hci_run(); 5918 break; 5919 default: 5920 break; 5921 } 5922 return 0; 5923 } 5924 #endif 5925 5926 #ifdef ENABLE_LE_CENTRAL 5927 /** 5928 * @brief Set connection parameters for outgoing connections 5929 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5930 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5931 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5932 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5933 * @param conn_latency, default: 4 5934 * @param supervision_timeout (unit: 10ms), default: 720 ms 5935 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5936 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5937 */ 5938 5939 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5940 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5941 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5942 hci_stack->le_connection_scan_interval = conn_scan_interval; 5943 hci_stack->le_connection_scan_window = conn_scan_window; 5944 hci_stack->le_connection_interval_min = conn_interval_min; 5945 hci_stack->le_connection_interval_max = conn_interval_max; 5946 hci_stack->le_connection_latency = conn_latency; 5947 hci_stack->le_supervision_timeout = supervision_timeout; 5948 hci_stack->le_minimum_ce_length = min_ce_length; 5949 hci_stack->le_maximum_ce_length = max_ce_length; 5950 } 5951 #endif 5952 5953 /** 5954 * @brief Updates the connection parameters for a given LE connection 5955 * @param handle 5956 * @param conn_interval_min (unit: 1.25ms) 5957 * @param conn_interval_max (unit: 1.25ms) 5958 * @param conn_latency 5959 * @param supervision_timeout (unit: 10ms) 5960 * @returns 0 if ok 5961 */ 5962 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5963 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5964 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5965 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5966 connection->le_conn_interval_min = conn_interval_min; 5967 connection->le_conn_interval_max = conn_interval_max; 5968 connection->le_conn_latency = conn_latency; 5969 connection->le_supervision_timeout = supervision_timeout; 5970 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5971 hci_run(); 5972 return 0; 5973 } 5974 5975 /** 5976 * @brief Request an update of the connection parameter for a given LE connection 5977 * @param handle 5978 * @param conn_interval_min (unit: 1.25ms) 5979 * @param conn_interval_max (unit: 1.25ms) 5980 * @param conn_latency 5981 * @param supervision_timeout (unit: 10ms) 5982 * @returns 0 if ok 5983 */ 5984 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5985 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5986 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5987 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5988 connection->le_conn_interval_min = conn_interval_min; 5989 connection->le_conn_interval_max = conn_interval_max; 5990 connection->le_conn_latency = conn_latency; 5991 connection->le_supervision_timeout = supervision_timeout; 5992 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5993 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5994 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5995 return 0; 5996 } 5997 5998 #ifdef ENABLE_LE_PERIPHERAL 5999 6000 /** 6001 * @brief Set Advertisement Data 6002 * @param advertising_data_length 6003 * @param advertising_data (max 31 octets) 6004 * @note data is not copied, pointer has to stay valid 6005 */ 6006 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6007 hci_stack->le_advertisements_data_len = advertising_data_length; 6008 hci_stack->le_advertisements_data = advertising_data; 6009 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6010 hci_run(); 6011 } 6012 6013 /** 6014 * @brief Set Scan Response Data 6015 * @param advertising_data_length 6016 * @param advertising_data (max 31 octets) 6017 * @note data is not copied, pointer has to stay valid 6018 */ 6019 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6020 hci_stack->le_scan_response_data_len = scan_response_data_length; 6021 hci_stack->le_scan_response_data = scan_response_data; 6022 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6023 hci_run(); 6024 } 6025 6026 /** 6027 * @brief Set Advertisement Parameters 6028 * @param adv_int_min 6029 * @param adv_int_max 6030 * @param adv_type 6031 * @param direct_address_type 6032 * @param direct_address 6033 * @param channel_map 6034 * @param filter_policy 6035 * 6036 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6037 */ 6038 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6039 uint8_t direct_address_typ, bd_addr_t direct_address, 6040 uint8_t channel_map, uint8_t filter_policy) { 6041 6042 hci_stack->le_advertisements_interval_min = adv_int_min; 6043 hci_stack->le_advertisements_interval_max = adv_int_max; 6044 hci_stack->le_advertisements_type = adv_type; 6045 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6046 hci_stack->le_advertisements_channel_map = channel_map; 6047 hci_stack->le_advertisements_filter_policy = filter_policy; 6048 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6049 6); 6050 6051 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6052 hci_run(); 6053 } 6054 6055 /** 6056 * @brief Enable/Disable Advertisements 6057 * @param enabled 6058 */ 6059 void gap_advertisements_enable(int enabled){ 6060 hci_stack->le_advertisements_enabled = enabled != 0; 6061 hci_update_advertisements_enabled_for_current_roles(); 6062 hci_run(); 6063 } 6064 6065 #endif 6066 6067 void hci_le_set_own_address_type(uint8_t own_address_type){ 6068 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6069 if (own_address_type == hci_stack->le_own_addr_type) return; 6070 hci_stack->le_own_addr_type = own_address_type; 6071 6072 #ifdef ENABLE_LE_PERIPHERAL 6073 // update advertisement parameters, too 6074 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6075 hci_run(); 6076 #endif 6077 #ifdef ENABLE_LE_CENTRAL 6078 // note: we don't update scan parameters or modify ongoing connection attempts 6079 #endif 6080 } 6081 6082 #endif 6083 6084 uint8_t gap_disconnect(hci_con_handle_t handle){ 6085 hci_connection_t * conn = hci_connection_for_handle(handle); 6086 if (!conn){ 6087 hci_emit_disconnection_complete(handle, 0); 6088 return 0; 6089 } 6090 // ignore if already disconnected 6091 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6092 return 0; 6093 } 6094 conn->state = SEND_DISCONNECT; 6095 hci_run(); 6096 return 0; 6097 } 6098 6099 int gap_read_rssi(hci_con_handle_t con_handle){ 6100 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6101 if (hci_connection == NULL) return 0; 6102 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6103 hci_run(); 6104 return 1; 6105 } 6106 6107 /** 6108 * @brief Get connection type 6109 * @param con_handle 6110 * @result connection_type 6111 */ 6112 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6113 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6114 if (!conn) return GAP_CONNECTION_INVALID; 6115 switch (conn->address_type){ 6116 case BD_ADDR_TYPE_LE_PUBLIC: 6117 case BD_ADDR_TYPE_LE_RANDOM: 6118 return GAP_CONNECTION_LE; 6119 case BD_ADDR_TYPE_SCO: 6120 return GAP_CONNECTION_SCO; 6121 case BD_ADDR_TYPE_ACL: 6122 return GAP_CONNECTION_ACL; 6123 default: 6124 return GAP_CONNECTION_INVALID; 6125 } 6126 } 6127 6128 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6129 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6130 if (!conn) return HCI_ROLE_INVALID; 6131 return (hci_role_t) conn->role; 6132 } 6133 6134 6135 #ifdef ENABLE_CLASSIC 6136 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6137 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6138 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6139 conn->request_role = role; 6140 hci_run(); 6141 return ERROR_CODE_SUCCESS; 6142 } 6143 #endif 6144 6145 #ifdef ENABLE_BLE 6146 6147 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){ 6148 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6149 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6150 6151 conn->le_phy_update_all_phys = all_phys; 6152 conn->le_phy_update_tx_phys = tx_phys; 6153 conn->le_phy_update_rx_phys = rx_phys; 6154 conn->le_phy_update_phy_options = phy_options; 6155 6156 hci_run(); 6157 6158 return 0; 6159 } 6160 6161 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6162 // check if already in list 6163 btstack_linked_list_iterator_t it; 6164 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6165 while (btstack_linked_list_iterator_has_next(&it)) { 6166 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6167 if (entry->address_type != address_type) { 6168 continue; 6169 } 6170 if (memcmp(entry->address, address, 6) != 0) { 6171 continue; 6172 } 6173 // disallow if already scheduled to add 6174 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6175 return ERROR_CODE_COMMAND_DISALLOWED; 6176 } 6177 // still on controller, but scheduled to remove -> re-add 6178 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6179 return ERROR_CODE_SUCCESS; 6180 } 6181 // alloc and add to list 6182 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6183 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6184 entry->address_type = address_type; 6185 (void)memcpy(entry->address, address, 6); 6186 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6187 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6188 return ERROR_CODE_SUCCESS; 6189 } 6190 6191 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6192 btstack_linked_list_iterator_t it; 6193 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6194 while (btstack_linked_list_iterator_has_next(&it)){ 6195 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6196 if (entry->address_type != address_type) { 6197 continue; 6198 } 6199 if (memcmp(entry->address, address, 6) != 0) { 6200 continue; 6201 } 6202 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6203 // remove from controller if already present 6204 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6205 } else { 6206 // directly remove entry from whitelist 6207 btstack_linked_list_iterator_remove(&it); 6208 btstack_memory_whitelist_entry_free(entry); 6209 } 6210 return ERROR_CODE_SUCCESS; 6211 } 6212 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6213 } 6214 6215 static void hci_whitelist_clear(void){ 6216 btstack_linked_list_iterator_t it; 6217 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6218 while (btstack_linked_list_iterator_has_next(&it)){ 6219 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6220 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6221 // remove from controller if already present 6222 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6223 continue; 6224 } 6225 // directly remove entry from whitelist 6226 btstack_linked_list_iterator_remove(&it); 6227 btstack_memory_whitelist_entry_free(entry); 6228 } 6229 } 6230 6231 /** 6232 * @brief Clear Whitelist 6233 * @returns 0 if ok 6234 */ 6235 uint8_t gap_whitelist_clear(void){ 6236 hci_whitelist_clear(); 6237 hci_run(); 6238 return ERROR_CODE_SUCCESS; 6239 } 6240 6241 /** 6242 * @brief Add Device to Whitelist 6243 * @param address_typ 6244 * @param address 6245 * @returns 0 if ok 6246 */ 6247 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6248 uint8_t status = hci_whitelist_add(address_type, address); 6249 if (status){ 6250 return status; 6251 } 6252 hci_run(); 6253 return ERROR_CODE_SUCCESS; 6254 } 6255 6256 /** 6257 * @brief Remove Device from Whitelist 6258 * @param address_typ 6259 * @param address 6260 * @returns 0 if ok 6261 */ 6262 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6263 uint8_t status = hci_whitelist_remove(address_type, address); 6264 if (status){ 6265 return status; 6266 } 6267 hci_run(); 6268 return ERROR_CODE_SUCCESS; 6269 } 6270 6271 #ifdef ENABLE_LE_CENTRAL 6272 /** 6273 * @brief Connect with Whitelist 6274 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6275 * @returns - if ok 6276 */ 6277 uint8_t gap_connect_with_whitelist(void){ 6278 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6279 return ERROR_CODE_COMMAND_DISALLOWED; 6280 } 6281 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6282 hci_run(); 6283 return ERROR_CODE_SUCCESS; 6284 } 6285 6286 /** 6287 * @brief Auto Connection Establishment - Start Connecting to device 6288 * @param address_typ 6289 * @param address 6290 * @returns 0 if ok 6291 */ 6292 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6293 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6294 return ERROR_CODE_COMMAND_DISALLOWED; 6295 } 6296 6297 uint8_t status = hci_whitelist_add(address_type, address); 6298 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6299 return status; 6300 } 6301 6302 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6303 6304 hci_run(); 6305 return ERROR_CODE_SUCCESS; 6306 } 6307 6308 /** 6309 * @brief Auto Connection Establishment - Stop Connecting to device 6310 * @param address_typ 6311 * @param address 6312 * @returns 0 if ok 6313 */ 6314 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6315 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6316 return ERROR_CODE_COMMAND_DISALLOWED; 6317 } 6318 6319 hci_whitelist_remove(address_type, address); 6320 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6321 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6322 } 6323 hci_run(); 6324 return 0; 6325 } 6326 6327 /** 6328 * @brief Auto Connection Establishment - Stop everything 6329 * @note Convenience function to stop all active auto connection attempts 6330 */ 6331 uint8_t gap_auto_connection_stop_all(void){ 6332 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6333 return ERROR_CODE_COMMAND_DISALLOWED; 6334 } 6335 hci_whitelist_clear(); 6336 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6337 hci_run(); 6338 return ERROR_CODE_SUCCESS; 6339 } 6340 6341 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6342 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6343 if (!conn) return 0; 6344 return conn->le_connection_interval; 6345 } 6346 #endif 6347 #endif 6348 6349 #ifdef ENABLE_CLASSIC 6350 /** 6351 * @brief Set Extended Inquiry Response data 6352 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6353 * @note has to be done before stack starts up 6354 */ 6355 void gap_set_extended_inquiry_response(const uint8_t * data){ 6356 hci_stack->eir_data = data; 6357 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6358 hci_run(); 6359 } 6360 6361 /** 6362 * @brief Start GAP Classic Inquiry 6363 * @param duration in 1.28s units 6364 * @return 0 if ok 6365 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6366 */ 6367 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6368 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6369 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6370 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6371 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6372 } 6373 hci_stack->inquiry_state = duration_in_1280ms_units; 6374 hci_run(); 6375 return 0; 6376 } 6377 6378 /** 6379 * @brief Stop GAP Classic Inquiry 6380 * @returns 0 if ok 6381 */ 6382 int gap_inquiry_stop(void){ 6383 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6384 // emit inquiry complete event, before it even started 6385 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6386 hci_emit_event(event, sizeof(event), 1); 6387 return 0; 6388 } 6389 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6390 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6391 hci_run(); 6392 return 0; 6393 } 6394 6395 void gap_inquiry_set_lap(uint32_t lap){ 6396 hci_stack->inquiry_lap = lap; 6397 } 6398 6399 6400 /** 6401 * @brief Remote Name Request 6402 * @param addr 6403 * @param page_scan_repetition_mode 6404 * @param clock_offset only used when bit 15 is set 6405 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6406 */ 6407 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6408 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6409 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6410 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6411 hci_stack->remote_name_clock_offset = clock_offset; 6412 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6413 hci_run(); 6414 return 0; 6415 } 6416 6417 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6418 hci_stack->gap_pairing_state = state; 6419 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6420 hci_run(); 6421 return 0; 6422 } 6423 6424 /** 6425 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6426 * @param addr 6427 * @param pin_data 6428 * @param pin_len 6429 * @return 0 if ok 6430 */ 6431 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6432 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6433 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6434 hci_stack->gap_pairing_pin_len = pin_len; 6435 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6436 } 6437 6438 /** 6439 * @brief Legacy Pairing Pin Code Response 6440 * @param addr 6441 * @param pin 6442 * @return 0 if ok 6443 */ 6444 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6445 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6446 } 6447 6448 /** 6449 * @brief Abort Legacy Pairing 6450 * @param addr 6451 * @param pin 6452 * @return 0 if ok 6453 */ 6454 int gap_pin_code_negative(bd_addr_t addr){ 6455 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6456 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6457 } 6458 6459 /** 6460 * @brief SSP Passkey Response 6461 * @param addr 6462 * @param passkey 6463 * @return 0 if ok 6464 */ 6465 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6466 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6467 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6468 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6469 } 6470 6471 /** 6472 * @brief Abort SSP Passkey Entry/Pairing 6473 * @param addr 6474 * @param pin 6475 * @return 0 if ok 6476 */ 6477 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6478 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6479 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6480 } 6481 6482 /** 6483 * @brief Accept SSP Numeric Comparison 6484 * @param addr 6485 * @param passkey 6486 * @return 0 if ok 6487 */ 6488 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6489 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6490 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6491 } 6492 6493 /** 6494 * @brief Abort SSP Numeric Comparison/Pairing 6495 * @param addr 6496 * @param pin 6497 * @return 0 if ok 6498 */ 6499 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6500 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6501 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6502 } 6503 6504 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6505 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6506 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6507 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6508 connectionSetAuthenticationFlags(conn, flag); 6509 hci_run(); 6510 return ERROR_CODE_SUCCESS; 6511 } 6512 #endif 6513 6514 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6515 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6516 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6517 } 6518 6519 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6520 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6521 } 6522 #endif 6523 6524 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6525 /** 6526 * @brief Report Remote OOB Data 6527 * @param bd_addr 6528 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6529 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6530 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6531 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6532 */ 6533 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){ 6534 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6535 if (connection == NULL) { 6536 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6537 } 6538 connection->classic_oob_c_192 = c_192; 6539 connection->classic_oob_r_192 = r_192; 6540 6541 // ignore P-256 if not supported by us 6542 if (hci_stack->secure_connections_active){ 6543 connection->classic_oob_c_256 = c_256; 6544 connection->classic_oob_r_256 = r_256; 6545 } 6546 6547 return ERROR_CODE_SUCCESS; 6548 } 6549 /** 6550 * @brief Generate new OOB data 6551 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6552 */ 6553 void gap_ssp_generate_oob_data(void){ 6554 hci_stack->classic_read_local_oob_data = true; 6555 hci_run(); 6556 } 6557 6558 #endif 6559 6560 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6561 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6562 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6563 if (connection == NULL) { 6564 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6565 } 6566 6567 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6568 connection->link_key_type = type; 6569 6570 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6571 } 6572 6573 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6574 /** 6575 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6576 * @param inquiry_mode see bluetooth_defines.h 6577 */ 6578 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6579 hci_stack->inquiry_mode = inquiry_mode; 6580 } 6581 6582 /** 6583 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6584 */ 6585 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6586 hci_stack->sco_voice_setting = voice_setting; 6587 } 6588 6589 /** 6590 * @brief Get SCO Voice Setting 6591 * @return current voice setting 6592 */ 6593 uint16_t hci_get_sco_voice_setting(void){ 6594 return hci_stack->sco_voice_setting; 6595 } 6596 6597 static int hci_have_usb_transport(void){ 6598 if (!hci_stack->hci_transport) return 0; 6599 const char * transport_name = hci_stack->hci_transport->name; 6600 if (!transport_name) return 0; 6601 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6602 } 6603 6604 /** @brief Get SCO packet length for current SCO Voice setting 6605 * @note Using SCO packets of the exact length is required for USB transfer 6606 * @return Length of SCO packets in bytes (not audio frames) 6607 */ 6608 uint16_t hci_get_sco_packet_length(void){ 6609 uint16_t sco_packet_length = 0; 6610 6611 #ifdef ENABLE_SCO_OVER_HCI 6612 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6613 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6614 6615 if (hci_have_usb_transport()){ 6616 // see Core Spec for H2 USB Transfer. 6617 // 3 byte SCO header + 24 bytes per connection 6618 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6619 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6620 } else { 6621 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6622 sco_packet_length = 3 + 60 * multiplier; 6623 // assert that it still fits inside an SCO buffer 6624 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6625 sco_packet_length = 3 + 60; 6626 } 6627 } 6628 #endif 6629 6630 #ifdef HAVE_SCO_TRANSPORT 6631 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6632 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6633 sco_packet_length = 3 + 60 * multiplier; 6634 #endif 6635 return sco_packet_length; 6636 } 6637 6638 /** 6639 * @brief Sets the master/slave policy 6640 * @param policy (0: attempt to become master, 1: let connecting device decide) 6641 */ 6642 void hci_set_master_slave_policy(uint8_t policy){ 6643 hci_stack->master_slave_policy = policy; 6644 } 6645 6646 #endif 6647 6648 HCI_STATE hci_get_state(void){ 6649 return hci_stack->state; 6650 } 6651 6652 #ifdef ENABLE_CLASSIC 6653 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6654 hci_stack->gap_classic_accept_callback = accept_callback; 6655 } 6656 #endif 6657 6658 /** 6659 * @brief Set callback for Bluetooth Hardware Error 6660 */ 6661 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6662 hci_stack->hardware_error_callback = fn; 6663 } 6664 6665 void hci_disconnect_all(void){ 6666 btstack_linked_list_iterator_t it; 6667 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6668 while (btstack_linked_list_iterator_has_next(&it)){ 6669 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6670 if (con->state == SENT_DISCONNECT) continue; 6671 con->state = SEND_DISCONNECT; 6672 } 6673 hci_run(); 6674 } 6675 6676 uint16_t hci_get_manufacturer(void){ 6677 return hci_stack->manufacturer; 6678 } 6679 6680 #ifdef ENABLE_BLE 6681 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6682 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6683 if (!hci_con) return NULL; 6684 return &hci_con->sm_connection; 6685 } 6686 6687 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6688 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6689 #endif 6690 6691 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6692 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6693 if (hci_connection == NULL) return 0; 6694 if (hci_is_le_connection(hci_connection)){ 6695 #ifdef ENABLE_BLE 6696 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6697 if (sm_conn->sm_connection_encrypted) { 6698 return sm_conn->sm_actual_encryption_key_size; 6699 } 6700 #endif 6701 } else { 6702 #ifdef ENABLE_CLASSIC 6703 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6704 return hci_connection->encryption_key_size; 6705 } 6706 #endif 6707 } 6708 return 0; 6709 } 6710 6711 int gap_authenticated(hci_con_handle_t con_handle){ 6712 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6713 if (hci_connection == NULL) return 0; 6714 6715 switch (hci_connection->address_type){ 6716 #ifdef ENABLE_BLE 6717 case BD_ADDR_TYPE_LE_PUBLIC: 6718 case BD_ADDR_TYPE_LE_RANDOM: 6719 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6720 return hci_connection->sm_connection.sm_connection_authenticated; 6721 #endif 6722 #ifdef ENABLE_CLASSIC 6723 case BD_ADDR_TYPE_SCO: 6724 case BD_ADDR_TYPE_ACL: 6725 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6726 #endif 6727 default: 6728 return 0; 6729 } 6730 } 6731 6732 int gap_secure_connection(hci_con_handle_t con_handle){ 6733 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6734 if (hci_connection == NULL) return 0; 6735 6736 switch (hci_connection->address_type){ 6737 #ifdef ENABLE_BLE 6738 case BD_ADDR_TYPE_LE_PUBLIC: 6739 case BD_ADDR_TYPE_LE_RANDOM: 6740 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6741 return hci_connection->sm_connection.sm_connection_sc; 6742 #endif 6743 #ifdef ENABLE_CLASSIC 6744 case BD_ADDR_TYPE_SCO: 6745 case BD_ADDR_TYPE_ACL: 6746 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6747 #endif 6748 default: 6749 return 0; 6750 } 6751 } 6752 6753 bool gap_bonded(hci_con_handle_t con_handle){ 6754 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6755 if (hci_connection == NULL) return 0; 6756 6757 #ifdef ENABLE_CLASSIC 6758 link_key_t link_key; 6759 link_key_type_t link_key_type; 6760 #endif 6761 switch (hci_connection->address_type){ 6762 #ifdef ENABLE_BLE 6763 case BD_ADDR_TYPE_LE_PUBLIC: 6764 case BD_ADDR_TYPE_LE_RANDOM: 6765 return hci_connection->sm_connection.sm_le_db_index >= 0; 6766 #endif 6767 #ifdef ENABLE_CLASSIC 6768 case BD_ADDR_TYPE_SCO: 6769 case BD_ADDR_TYPE_ACL: 6770 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6771 #endif 6772 default: 6773 return false; 6774 } 6775 } 6776 6777 #ifdef ENABLE_BLE 6778 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6779 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6780 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6781 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6782 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6783 return sm_conn->sm_connection_authorization_state; 6784 } 6785 #endif 6786 6787 #ifdef ENABLE_CLASSIC 6788 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){ 6789 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6790 if (!conn) return GAP_CONNECTION_INVALID; 6791 conn->sniff_min_interval = sniff_min_interval; 6792 conn->sniff_max_interval = sniff_max_interval; 6793 conn->sniff_attempt = sniff_attempt; 6794 conn->sniff_timeout = sniff_timeout; 6795 hci_run(); 6796 return 0; 6797 } 6798 6799 /** 6800 * @brief Exit Sniff mode 6801 * @param con_handle 6802 @ @return 0 if ok 6803 */ 6804 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6805 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6806 if (!conn) return GAP_CONNECTION_INVALID; 6807 conn->sniff_min_interval = 0xffff; 6808 hci_run(); 6809 return 0; 6810 } 6811 6812 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){ 6813 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6814 if (!conn) return GAP_CONNECTION_INVALID; 6815 conn->sniff_subrating_max_latency = max_latency; 6816 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6817 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6818 hci_run(); 6819 return ERROR_CODE_SUCCESS; 6820 } 6821 6822 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){ 6823 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6824 if (!conn) return GAP_CONNECTION_INVALID; 6825 conn->qos_service_type = service_type; 6826 conn->qos_token_rate = token_rate; 6827 conn->qos_peak_bandwidth = peak_bandwidth; 6828 conn->qos_latency = latency; 6829 conn->qos_delay_variation = delay_variation; 6830 hci_run(); 6831 return ERROR_CODE_SUCCESS; 6832 } 6833 6834 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6835 hci_stack->new_page_scan_interval = page_scan_interval; 6836 hci_stack->new_page_scan_window = page_scan_window; 6837 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6838 hci_run(); 6839 } 6840 6841 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6842 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6843 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6844 hci_run(); 6845 } 6846 6847 #endif 6848 6849 void hci_halting_defer(void){ 6850 if (hci_stack->state != HCI_STATE_HALTING) return; 6851 switch (hci_stack->substate){ 6852 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6853 case HCI_HALTING_CLOSE: 6854 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6855 break; 6856 default: 6857 break; 6858 } 6859 } 6860 6861 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6862 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6863 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6864 if (le_device_db_index >= le_device_db_max_count()) return; 6865 uint8_t offset = le_device_db_index >> 3; 6866 uint8_t mask = 1 << (le_device_db_index & 7); 6867 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6868 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6869 // note: go back to remove entries, otherwise, a remove + add will skip the add 6870 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6871 } 6872 } 6873 6874 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6875 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6876 if (le_device_db_index >= le_device_db_max_count()) return; 6877 uint8_t offset = le_device_db_index >> 3; 6878 uint8_t mask = 1 << (le_device_db_index & 7); 6879 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6880 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6881 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6882 } 6883 } 6884 6885 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6886 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6887 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6888 } 6889 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6890 // restart le resolving list update 6891 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6892 } 6893 return ERROR_CODE_SUCCESS; 6894 } 6895 #endif 6896 6897 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6898 void hci_setup_test_connections_fuzz(void){ 6899 hci_connection_t * conn; 6900 6901 // default address: 66:55:44:33:00:01 6902 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6903 6904 // setup Controller info 6905 hci_stack->num_cmd_packets = 255; 6906 hci_stack->acl_packets_total_num = 255; 6907 6908 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6909 addr[5] = 0x01; 6910 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6911 conn->con_handle = addr[5]; 6912 conn->role = HCI_ROLE_SLAVE; 6913 conn->state = RECEIVED_CONNECTION_REQUEST; 6914 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6915 6916 // setup incoming Classic SCO connection with con handle 0x0002 6917 addr[5] = 0x02; 6918 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6919 conn->con_handle = addr[5]; 6920 conn->role = HCI_ROLE_SLAVE; 6921 conn->state = RECEIVED_CONNECTION_REQUEST; 6922 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6923 6924 // setup ready Classic ACL connection with con handle 0x0003 6925 addr[5] = 0x03; 6926 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6927 conn->con_handle = addr[5]; 6928 conn->role = HCI_ROLE_SLAVE; 6929 conn->state = OPEN; 6930 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6931 6932 // setup ready Classic SCO connection with con handle 0x0004 6933 addr[5] = 0x04; 6934 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6935 conn->con_handle = addr[5]; 6936 conn->role = HCI_ROLE_SLAVE; 6937 conn->state = OPEN; 6938 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6939 6940 // setup ready LE ACL connection with con handle 0x005 and public address 6941 addr[5] = 0x05; 6942 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6943 conn->con_handle = addr[5]; 6944 conn->role = HCI_ROLE_SLAVE; 6945 conn->state = OPEN; 6946 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6947 conn->sm_connection.sm_connection_encrypted = 1; 6948 } 6949 6950 void hci_free_connections_fuzz(void){ 6951 btstack_linked_list_iterator_t it; 6952 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6953 while (btstack_linked_list_iterator_has_next(&it)){ 6954 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6955 btstack_linked_list_iterator_remove(&it); 6956 btstack_memory_hci_connection_free(con); 6957 } 6958 } 6959 void hci_simulate_working_fuzz(void){ 6960 hci_init_done(); 6961 hci_stack->num_cmd_packets = 255; 6962 } 6963 #endif 6964