1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // prototypes 136 #ifdef ENABLE_CLASSIC 137 static void hci_update_scan_enable(void); 138 static void hci_emit_discoverable_enabled(uint8_t enabled); 139 static int hci_local_ssp_activated(void); 140 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 141 static bool hci_ssp_supported(hci_connection_t * connection); 142 static void hci_notify_if_sco_can_send_now(void); 143 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 144 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 145 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 146 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 147 static void hci_connection_timestamp(hci_connection_t *connection); 148 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 149 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 150 #endif 151 152 static int hci_power_control_on(void); 153 static void hci_power_control_off(void); 154 static void hci_state_reset(void); 155 static void hci_emit_transport_packet_sent(void); 156 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 157 static void hci_emit_nr_connections_changed(void); 158 static void hci_emit_hci_open_failed(void); 159 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 160 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 161 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 162 static void hci_run(void); 163 static int hci_is_le_connection(hci_connection_t * connection); 164 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 165 166 #ifdef ENABLE_CLASSIC 167 static int hci_have_usb_transport(void); 168 #endif 169 170 #ifdef ENABLE_BLE 171 #ifdef ENABLE_LE_CENTRAL 172 // called from test/ble_client/advertising_data_parser.c 173 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 174 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 175 static hci_connection_t * gap_get_outgoing_connection(void); 176 #endif 177 #endif 178 179 // the STACK is here 180 #ifndef HAVE_MALLOC 181 static hci_stack_t hci_stack_static; 182 #endif 183 static hci_stack_t * hci_stack = NULL; 184 185 #ifdef ENABLE_CLASSIC 186 // default name 187 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 188 189 // test helper 190 static uint8_t disable_l2cap_timeouts = 0; 191 #endif 192 193 // reset connection state on create and on reconnect 194 // don't overwrite addr, con handle, role 195 static void hci_connection_init(hci_connection_t * conn){ 196 conn->authentication_flags = AUTH_FLAG_NONE; 197 conn->bonding_flags = 0; 198 conn->requested_security_level = LEVEL_0; 199 #ifdef ENABLE_CLASSIC 200 conn->request_role = HCI_ROLE_INVALID; 201 conn->sniff_subrating_max_latency = 0xffff; 202 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 203 conn->link_key_type = INVALID_LINK_KEY; 204 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 205 btstack_run_loop_set_timer_context(&conn->timeout, conn); 206 hci_connection_timestamp(conn); 207 #endif 208 conn->acl_recombination_length = 0; 209 conn->acl_recombination_pos = 0; 210 conn->num_packets_sent = 0; 211 212 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 213 #ifdef ENABLE_BLE 214 conn->le_phy_update_all_phys = 0xff; 215 #endif 216 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 217 conn->le_max_tx_octets = 27; 218 #endif 219 #ifdef ENABLE_CLASSIC_PAIRING_OOB 220 conn->classic_oob_c_192 = NULL; 221 conn->classic_oob_r_192 = NULL; 222 conn->classic_oob_c_256 = NULL; 223 conn->classic_oob_r_256 = NULL; 224 #endif 225 } 226 227 /** 228 * create connection for given address 229 * 230 * @return connection OR NULL, if no memory left 231 */ 232 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 233 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 234 235 hci_connection_t * conn = btstack_memory_hci_connection_get(); 236 if (!conn) return NULL; 237 hci_connection_init(conn); 238 239 bd_addr_copy(conn->address, addr); 240 conn->address_type = addr_type; 241 conn->con_handle = HCI_CON_HANDLE_INVALID; 242 conn->role = HCI_ROLE_INVALID; 243 244 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 245 246 return conn; 247 } 248 249 250 /** 251 * get le connection parameter range 252 * 253 * @return le connection parameter range struct 254 */ 255 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 256 *range = hci_stack->le_connection_parameter_range; 257 } 258 259 /** 260 * set le connection parameter range 261 * 262 */ 263 264 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 265 hci_stack->le_connection_parameter_range = *range; 266 } 267 268 /** 269 * @brief Test if connection parameters are inside in existing rage 270 * @param conn_interval_min (unit: 1.25ms) 271 * @param conn_interval_max (unit: 1.25ms) 272 * @param conn_latency 273 * @param supervision_timeout (unit: 10ms) 274 * @returns 1 if included 275 */ 276 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 277 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 278 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 279 280 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 281 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 282 283 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 284 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 285 286 return 1; 287 } 288 289 /** 290 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 291 * @note: default: 1 292 * @param max_peripheral_connections 293 */ 294 #ifdef ENABLE_LE_PERIPHERAL 295 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 296 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 297 } 298 #endif 299 300 /** 301 * get hci connections iterator 302 * 303 * @return hci connections iterator 304 */ 305 306 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 307 btstack_linked_list_iterator_init(it, &hci_stack->connections); 308 } 309 310 /** 311 * get connection for a given handle 312 * 313 * @return connection OR NULL, if not found 314 */ 315 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 316 btstack_linked_list_iterator_t it; 317 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 318 while (btstack_linked_list_iterator_has_next(&it)){ 319 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 320 if ( item->con_handle == con_handle ) { 321 return item; 322 } 323 } 324 return NULL; 325 } 326 327 /** 328 * get connection for given address 329 * 330 * @return connection OR NULL, if not found 331 */ 332 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 337 if (connection->address_type != addr_type) continue; 338 if (memcmp(addr, connection->address, 6) != 0) continue; 339 return connection; 340 } 341 return NULL; 342 } 343 344 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 345 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 346 } 347 348 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 350 } 351 352 #ifdef ENABLE_CLASSIC 353 354 #ifdef ENABLE_SCO_OVER_HCI 355 static int hci_number_sco_connections(void){ 356 int connections = 0; 357 btstack_linked_list_iterator_t it; 358 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 359 while (btstack_linked_list_iterator_has_next(&it)){ 360 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 361 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 362 connections++; 363 } 364 return connections; 365 } 366 #endif 367 368 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 369 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 370 #ifdef HAVE_EMBEDDED_TICK 371 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 372 // connections might be timed out 373 hci_emit_l2cap_check_timeout(connection); 374 } 375 #else 376 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 377 // connections might be timed out 378 hci_emit_l2cap_check_timeout(connection); 379 } 380 #endif 381 } 382 383 static void hci_connection_timestamp(hci_connection_t *connection){ 384 #ifdef HAVE_EMBEDDED_TICK 385 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 386 #else 387 connection->timestamp = btstack_run_loop_get_time_ms(); 388 #endif 389 } 390 391 /** 392 * add authentication flags and reset timer 393 * @note: assumes classic connection 394 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 395 */ 396 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 397 bd_addr_t addr; 398 reverse_bd_addr(bd_addr, addr); 399 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 400 if (conn) { 401 connectionSetAuthenticationFlags(conn, flags); 402 hci_connection_timestamp(conn); 403 } 404 } 405 406 static bool hci_pairing_active(hci_connection_t * hci_connection){ 407 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 408 } 409 410 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 411 if (hci_pairing_active(hci_connection)) return; 412 if (ssp){ 413 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 414 } else { 415 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 416 } 417 // if we are initiator, we have sent an HCI Authenticate Request 418 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 419 420 // if we are responder, use minimal service security level as required level 421 if (!initiator){ 422 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 423 } 424 425 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 426 427 uint8_t event[12]; 428 event[0] = GAP_EVENT_PAIRING_STARTED; 429 event[1] = 10; 430 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 431 reverse_bd_addr(hci_connection->address, &event[4]); 432 event[10] = (uint8_t) ssp; 433 event[11] = (uint8_t) initiator; 434 hci_emit_event(event, sizeof(event), 1); 435 } 436 437 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 438 hci_connection->requested_security_level = LEVEL_0; 439 if (!hci_pairing_active(hci_connection)) return; 440 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 441 #ifdef ENABLE_CLASSIC_PAIRING_OOB 442 hci_connection->classic_oob_c_192 = NULL; 443 hci_connection->classic_oob_r_192 = NULL; 444 hci_connection->classic_oob_c_256 = NULL; 445 hci_connection->classic_oob_r_256 = NULL; 446 #endif 447 log_info("pairing complete, status %02x", status); 448 449 uint8_t event[12]; 450 event[0] = GAP_EVENT_PAIRING_COMPLETE; 451 event[1] = 9; 452 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 453 reverse_bd_addr(hci_connection->address, &event[4]); 454 event[10] = status; 455 hci_emit_event(event, sizeof(event), 1); 456 } 457 458 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 459 hci_connection_t * conn = hci_connection_for_handle(handle); 460 if (!conn) return false; 461 return hci_pairing_active(conn); 462 } 463 464 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 465 if (!hci_stack->link_key_db) return; 466 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 467 hci_stack->link_key_db->delete_link_key(addr); 468 } 469 470 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 471 if (!hci_stack->link_key_db) return; 472 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 473 hci_stack->link_key_db->put_link_key(addr, link_key, type); 474 } 475 476 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 477 if (!hci_stack->link_key_db) return false; 478 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 479 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 480 return result; 481 } 482 483 void gap_delete_all_link_keys(void){ 484 bd_addr_t addr; 485 link_key_t link_key; 486 link_key_type_t type; 487 btstack_link_key_iterator_t it; 488 int ok = gap_link_key_iterator_init(&it); 489 if (!ok) { 490 log_error("could not initialize iterator"); 491 return; 492 } 493 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 494 gap_drop_link_key_for_bd_addr(addr); 495 } 496 gap_link_key_iterator_done(&it); 497 } 498 499 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 500 if (!hci_stack->link_key_db) return 0; 501 if (!hci_stack->link_key_db->iterator_init) return 0; 502 return hci_stack->link_key_db->iterator_init(it); 503 } 504 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 505 if (!hci_stack->link_key_db) return 0; 506 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 507 } 508 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 509 if (!hci_stack->link_key_db) return; 510 hci_stack->link_key_db->iterator_done(it); 511 } 512 #endif 513 514 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 515 switch (address_type){ 516 case BD_ADDR_TYPE_LE_PUBLIC: 517 case BD_ADDR_TYPE_LE_RANDOM: 518 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 519 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 520 return true; 521 default: 522 return false; 523 } 524 } 525 526 static int hci_is_le_connection(hci_connection_t * connection){ 527 return hci_is_le_connection_type(connection->address_type); 528 } 529 530 /** 531 * count connections 532 */ 533 static int nr_hci_connections(void){ 534 int count = 0; 535 btstack_linked_item_t *it; 536 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 537 count++; 538 } 539 return count; 540 } 541 542 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 543 544 unsigned int num_packets_sent_classic = 0; 545 unsigned int num_packets_sent_le = 0; 546 547 btstack_linked_item_t *it; 548 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 549 hci_connection_t * connection = (hci_connection_t *) it; 550 if (hci_is_le_connection(connection)){ 551 num_packets_sent_le += connection->num_packets_sent; 552 } 553 if (connection->address_type == BD_ADDR_TYPE_ACL){ 554 num_packets_sent_classic += connection->num_packets_sent; 555 } 556 } 557 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 558 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 559 int free_slots_le = 0; 560 561 if (free_slots_classic < 0){ 562 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 563 return 0; 564 } 565 566 if (hci_stack->le_acl_packets_total_num){ 567 // if we have LE slots, they are used 568 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 569 if (free_slots_le < 0){ 570 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 571 return 0; 572 } 573 } else { 574 // otherwise, classic slots are used for LE, too 575 free_slots_classic -= num_packets_sent_le; 576 if (free_slots_classic < 0){ 577 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 578 return 0; 579 } 580 } 581 582 switch (address_type){ 583 case BD_ADDR_TYPE_UNKNOWN: 584 log_error("hci_number_free_acl_slots: unknown address type"); 585 return 0; 586 587 case BD_ADDR_TYPE_ACL: 588 return free_slots_classic; 589 590 default: 591 if (hci_stack->le_acl_packets_total_num){ 592 return free_slots_le; 593 } 594 return free_slots_classic; 595 } 596 } 597 598 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 599 // get connection type 600 hci_connection_t * connection = hci_connection_for_handle(con_handle); 601 if (!connection){ 602 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 603 return 0; 604 } 605 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 606 } 607 608 #ifdef ENABLE_CLASSIC 609 static int hci_number_free_sco_slots(void){ 610 unsigned int num_sco_packets_sent = 0; 611 btstack_linked_item_t *it; 612 if (hci_stack->synchronous_flow_control_enabled){ 613 // explicit flow control 614 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 615 hci_connection_t * connection = (hci_connection_t *) it; 616 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 617 num_sco_packets_sent += connection->num_packets_sent; 618 } 619 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 620 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 621 return 0; 622 } 623 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 624 } else { 625 // implicit flow control -- TODO 626 int num_ready = 0; 627 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 628 hci_connection_t * connection = (hci_connection_t *) it; 629 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 630 if (connection->sco_tx_ready == 0) continue; 631 num_ready++; 632 } 633 return num_ready; 634 } 635 } 636 #endif 637 638 // only used to send HCI Host Number Completed Packets 639 static int hci_can_send_comand_packet_transport(void){ 640 if (hci_stack->hci_packet_buffer_reserved) return 0; 641 642 // check for async hci transport implementations 643 if (hci_stack->hci_transport->can_send_packet_now){ 644 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 645 return 0; 646 } 647 } 648 return 1; 649 } 650 651 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 652 bool hci_can_send_command_packet_now(void){ 653 if (hci_can_send_comand_packet_transport() == 0) return false; 654 return hci_stack->num_cmd_packets > 0u; 655 } 656 657 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 658 // check for async hci transport implementations 659 if (!hci_stack->hci_transport->can_send_packet_now) return true; 660 return hci_stack->hci_transport->can_send_packet_now(packet_type); 661 } 662 663 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 664 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 665 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 666 } 667 668 bool hci_can_send_acl_le_packet_now(void){ 669 if (hci_stack->hci_packet_buffer_reserved) return false; 670 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 671 } 672 673 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 674 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 675 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 676 } 677 678 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 679 if (hci_stack->hci_packet_buffer_reserved) return false; 680 return hci_can_send_prepared_acl_packet_now(con_handle); 681 } 682 683 #ifdef ENABLE_CLASSIC 684 bool hci_can_send_acl_classic_packet_now(void){ 685 if (hci_stack->hci_packet_buffer_reserved) return false; 686 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 687 } 688 689 bool hci_can_send_prepared_sco_packet_now(void){ 690 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 691 if (hci_have_usb_transport()){ 692 return hci_stack->sco_can_send_now; 693 } else { 694 return hci_number_free_sco_slots() > 0; 695 } 696 } 697 698 bool hci_can_send_sco_packet_now(void){ 699 if (hci_stack->hci_packet_buffer_reserved) return false; 700 return hci_can_send_prepared_sco_packet_now(); 701 } 702 703 void hci_request_sco_can_send_now_event(void){ 704 hci_stack->sco_waiting_for_can_send_now = 1; 705 hci_notify_if_sco_can_send_now(); 706 } 707 #endif 708 709 // used for internal checks in l2cap.c 710 bool hci_is_packet_buffer_reserved(void){ 711 return hci_stack->hci_packet_buffer_reserved; 712 } 713 714 // reserves outgoing packet buffer. @returns 1 if successful 715 bool hci_reserve_packet_buffer(void){ 716 if (hci_stack->hci_packet_buffer_reserved) { 717 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 718 return false; 719 } 720 hci_stack->hci_packet_buffer_reserved = true; 721 return true; 722 } 723 724 void hci_release_packet_buffer(void){ 725 hci_stack->hci_packet_buffer_reserved = false; 726 } 727 728 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 729 static int hci_transport_synchronous(void){ 730 return hci_stack->hci_transport->can_send_packet_now == NULL; 731 } 732 733 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 734 735 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 736 737 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 738 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 739 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 740 max_acl_data_packet_length = hci_stack->le_data_packets_length; 741 } 742 743 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 744 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 745 max_acl_data_packet_length = connection->le_max_tx_octets; 746 } 747 #endif 748 749 log_debug("hci_send_acl_packet_fragments entered"); 750 751 uint8_t status = ERROR_CODE_SUCCESS; 752 // multiple packets could be send on a synchronous HCI transport 753 while (true){ 754 755 log_debug("hci_send_acl_packet_fragments loop entered"); 756 757 // get current data 758 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 759 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 760 bool more_fragments = false; 761 762 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 763 if (current_acl_data_packet_length > max_acl_data_packet_length){ 764 more_fragments = true; 765 current_acl_data_packet_length = max_acl_data_packet_length; 766 } 767 768 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 769 if (acl_header_pos > 0u){ 770 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 771 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 772 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 773 } 774 775 // update header len 776 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 777 778 // count packet 779 connection->num_packets_sent++; 780 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 781 782 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 783 if (more_fragments){ 784 // update start of next fragment to send 785 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 786 } else { 787 // done 788 hci_stack->acl_fragmentation_pos = 0; 789 hci_stack->acl_fragmentation_total_size = 0; 790 } 791 792 // send packet 793 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 794 const int size = current_acl_data_packet_length + 4; 795 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 796 hci_stack->acl_fragmentation_tx_active = 1; 797 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 798 if (err != 0){ 799 // no error from HCI Transport expected 800 status = ERROR_CODE_HARDWARE_FAILURE; 801 } 802 803 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 804 805 // done yet? 806 if (!more_fragments) break; 807 808 // can send more? 809 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 810 } 811 812 log_debug("hci_send_acl_packet_fragments loop over"); 813 814 // release buffer now for synchronous transport 815 if (hci_transport_synchronous()){ 816 hci_stack->acl_fragmentation_tx_active = 0; 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 } 820 821 return status; 822 } 823 824 // pre: caller has reserved the packet buffer 825 uint8_t hci_send_acl_packet_buffer(int size){ 826 btstack_assert(hci_stack->hci_packet_buffer_reserved); 827 828 uint8_t * packet = hci_stack->hci_packet_buffer; 829 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 830 831 // check for free places on Bluetooth module 832 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 833 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 834 hci_release_packet_buffer(); 835 hci_emit_transport_packet_sent(); 836 return BTSTACK_ACL_BUFFERS_FULL; 837 } 838 839 hci_connection_t *connection = hci_connection_for_handle( con_handle); 840 if (!connection) { 841 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 842 hci_release_packet_buffer(); 843 hci_emit_transport_packet_sent(); 844 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 845 } 846 847 #ifdef ENABLE_CLASSIC 848 hci_connection_timestamp(connection); 849 #endif 850 851 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 852 853 // setup data 854 hci_stack->acl_fragmentation_total_size = size; 855 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 856 857 return hci_send_acl_packet_fragments(connection); 858 } 859 860 #ifdef ENABLE_CLASSIC 861 // pre: caller has reserved the packet buffer 862 uint8_t hci_send_sco_packet_buffer(int size){ 863 btstack_assert(hci_stack->hci_packet_buffer_reserved); 864 865 uint8_t * packet = hci_stack->hci_packet_buffer; 866 867 // skip checks in loopback mode 868 if (!hci_stack->loopback_mode){ 869 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 870 871 // check for free places on Bluetooth module 872 if (!hci_can_send_prepared_sco_packet_now()) { 873 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 874 hci_release_packet_buffer(); 875 hci_emit_transport_packet_sent(); 876 return BTSTACK_ACL_BUFFERS_FULL; 877 } 878 879 // track send packet in connection struct 880 hci_connection_t *connection = hci_connection_for_handle( con_handle); 881 if (!connection) { 882 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 883 hci_release_packet_buffer(); 884 hci_emit_transport_packet_sent(); 885 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 886 } 887 888 if (hci_have_usb_transport()){ 889 // token used 890 hci_stack->sco_can_send_now = false; 891 } else { 892 if (hci_stack->synchronous_flow_control_enabled){ 893 connection->num_packets_sent++; 894 } else { 895 connection->sco_tx_ready--; 896 } 897 } 898 } 899 900 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 901 902 #ifdef HAVE_SCO_TRANSPORT 903 hci_stack->sco_transport->send_packet(packet, size); 904 hci_release_packet_buffer(); 905 hci_emit_transport_packet_sent(); 906 907 return 0; 908 #else 909 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 910 if (hci_transport_synchronous()){ 911 hci_release_packet_buffer(); 912 hci_emit_transport_packet_sent(); 913 } 914 915 if (err != 0){ 916 return ERROR_CODE_HARDWARE_FAILURE; 917 } 918 return ERROR_CODE_SUCCESS; 919 #endif 920 } 921 #endif 922 923 static void acl_handler(uint8_t *packet, uint16_t size){ 924 925 // get info 926 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 927 hci_connection_t *conn = hci_connection_for_handle(con_handle); 928 uint8_t acl_flags = READ_ACL_FLAGS(packet); 929 uint16_t acl_length = READ_ACL_LENGTH(packet); 930 931 // ignore non-registered handle 932 if (!conn){ 933 log_error("acl_handler called with non-registered handle %u!" , con_handle); 934 return; 935 } 936 937 // assert packet is complete 938 if ((acl_length + 4u) != size){ 939 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 940 return; 941 } 942 943 #ifdef ENABLE_CLASSIC 944 // update idle timestamp 945 hci_connection_timestamp(conn); 946 #endif 947 948 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 949 hci_stack->host_completed_packets = 1; 950 conn->num_packets_completed++; 951 #endif 952 953 // handle different packet types 954 switch (acl_flags & 0x03u) { 955 956 case 0x01: // continuation fragment 957 958 // sanity checks 959 if (conn->acl_recombination_pos == 0u) { 960 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 961 return; 962 } 963 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 964 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 965 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 966 conn->acl_recombination_pos = 0; 967 return; 968 } 969 970 // append fragment payload (header already stored) 971 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 972 &packet[4], acl_length); 973 conn->acl_recombination_pos += acl_length; 974 975 // forward complete L2CAP packet if complete. 976 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 977 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 978 // reset recombination buffer 979 conn->acl_recombination_length = 0; 980 conn->acl_recombination_pos = 0; 981 } 982 break; 983 984 case 0x02: { // first fragment 985 986 // sanity check 987 if (conn->acl_recombination_pos) { 988 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 989 conn->acl_recombination_pos = 0; 990 } 991 992 // peek into L2CAP packet! 993 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 994 995 // compare fragment size to L2CAP packet size 996 if (acl_length >= (l2cap_length + 4u)){ 997 // forward fragment as L2CAP packet 998 hci_emit_acl_packet(packet, acl_length + 4u); 999 } else { 1000 1001 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1002 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1003 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1004 return; 1005 } 1006 1007 // store first fragment and tweak acl length for complete package 1008 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1009 packet, acl_length + 4u); 1010 conn->acl_recombination_pos = acl_length + 4u; 1011 conn->acl_recombination_length = l2cap_length; 1012 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1013 } 1014 break; 1015 1016 } 1017 default: 1018 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1019 return; 1020 } 1021 1022 // execute main loop 1023 hci_run(); 1024 } 1025 1026 static void hci_connection_stop_timer(hci_connection_t * conn){ 1027 btstack_run_loop_remove_timer(&conn->timeout); 1028 #ifdef ENABLE_CLASSIC 1029 btstack_run_loop_remove_timer(&conn->timeout_sco); 1030 #endif 1031 } 1032 1033 static void hci_shutdown_connection(hci_connection_t *conn){ 1034 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1035 1036 #ifdef ENABLE_CLASSIC 1037 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1038 bd_addr_type_t addr_type = conn->address_type; 1039 #endif 1040 #ifdef HAVE_SCO_TRANSPORT 1041 hci_con_handle_t con_handle = conn->con_handle; 1042 #endif 1043 #endif 1044 1045 hci_connection_stop_timer(conn); 1046 1047 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1048 btstack_memory_hci_connection_free( conn ); 1049 1050 // now it's gone 1051 hci_emit_nr_connections_changed(); 1052 1053 #ifdef ENABLE_CLASSIC 1054 #ifdef ENABLE_SCO_OVER_HCI 1055 // update SCO 1056 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1057 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1058 } 1059 #endif 1060 #ifdef HAVE_SCO_TRANSPORT 1061 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1062 hci_stack->sco_transport->close(con_handle); 1063 } 1064 #endif 1065 #endif 1066 } 1067 1068 #ifdef ENABLE_CLASSIC 1069 1070 static const uint16_t packet_type_sizes[] = { 1071 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1072 HCI_ACL_DH1_SIZE, 0, 0, 0, 1073 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1074 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1075 }; 1076 static const uint8_t packet_type_feature_requirement_bit[] = { 1077 0, // 3 slot packets 1078 1, // 5 slot packets 1079 25, // EDR 2 mpbs 1080 26, // EDR 3 mbps 1081 39, // 3 slot EDR packts 1082 40, // 5 slot EDR packet 1083 }; 1084 static const uint16_t packet_type_feature_packet_mask[] = { 1085 0x0f00, // 3 slot packets 1086 0xf000, // 5 slot packets 1087 0x1102, // EDR 2 mpbs 1088 0x2204, // EDR 3 mbps 1089 0x0300, // 3 slot EDR packts 1090 0x3000, // 5 slot EDR packet 1091 }; 1092 1093 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1094 // enable packet types based on size 1095 uint16_t packet_types = 0; 1096 unsigned int i; 1097 for (i=0;i<16;i++){ 1098 if (packet_type_sizes[i] == 0) continue; 1099 if (packet_type_sizes[i] <= buffer_size){ 1100 packet_types |= 1 << i; 1101 } 1102 } 1103 // disable packet types due to missing local supported features 1104 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1105 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1106 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1107 if (feature_set) continue; 1108 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1109 packet_types &= ~packet_type_feature_packet_mask[i]; 1110 } 1111 // flip bits for "may not be used" 1112 packet_types ^= 0x3306; 1113 return packet_types; 1114 } 1115 1116 uint16_t hci_usable_acl_packet_types(void){ 1117 return hci_stack->packet_types; 1118 } 1119 #endif 1120 1121 uint8_t* hci_get_outgoing_packet_buffer(void){ 1122 // hci packet buffer is >= acl data packet length 1123 return hci_stack->hci_packet_buffer; 1124 } 1125 1126 uint16_t hci_max_acl_data_packet_length(void){ 1127 return hci_stack->acl_data_packet_length; 1128 } 1129 1130 #ifdef ENABLE_CLASSIC 1131 bool hci_extended_sco_link_supported(void){ 1132 // No. 31, byte 3, bit 7 1133 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1134 } 1135 #endif 1136 1137 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1138 // No. 54, byte 6, bit 6 1139 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1140 } 1141 1142 static int gap_ssp_supported(void){ 1143 // No. 51, byte 6, bit 3 1144 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1145 } 1146 1147 static int hci_classic_supported(void){ 1148 #ifdef ENABLE_CLASSIC 1149 // No. 37, byte 4, bit 5, = No BR/EDR Support 1150 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1151 #else 1152 return 0; 1153 #endif 1154 } 1155 1156 static int hci_le_supported(void){ 1157 #ifdef ENABLE_BLE 1158 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1159 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1160 #else 1161 return 0; 1162 #endif 1163 } 1164 1165 #ifdef ENABLE_BLE 1166 1167 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1168 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1169 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1170 } else { 1171 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1172 } 1173 } 1174 1175 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1176 *addr_type = hci_stack->le_own_addr_type; 1177 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1178 } 1179 1180 #ifdef ENABLE_LE_PERIPHERAL 1181 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1182 *addr_type = hci_stack->le_advertisements_own_addr_type; 1183 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1184 }; 1185 #endif 1186 1187 #ifdef ENABLE_LE_CENTRAL 1188 1189 /** 1190 * @brief Get own addr type and address used for LE connections (Central) 1191 */ 1192 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1193 *addr_type = hci_stack->le_connection_own_addr_type; 1194 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1195 } 1196 1197 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1198 1199 int offset = 3; 1200 int num_reports = packet[offset]; 1201 offset += 1; 1202 1203 int i; 1204 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1205 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1206 for (i=0; (i<num_reports) && (offset < size);i++){ 1207 // sanity checks on data_length: 1208 uint8_t data_length = packet[offset + 8]; 1209 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1210 if ((offset + 9u + data_length + 1u) > size) return; 1211 // setup event 1212 uint8_t event_size = 10u + data_length; 1213 int pos = 0; 1214 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1215 event[pos++] = event_size; 1216 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1217 offset += 8; 1218 pos += 8; 1219 event[pos++] = packet[offset + 1 + data_length]; // rssi 1220 event[pos++] = data_length; 1221 offset++; 1222 (void)memcpy(&event[pos], &packet[offset], data_length); 1223 pos += data_length; 1224 offset += data_length + 1u; // rssi 1225 hci_emit_event(event, pos, 1); 1226 } 1227 } 1228 #endif 1229 #endif 1230 1231 #ifdef ENABLE_BLE 1232 #ifdef ENABLE_LE_PERIPHERAL 1233 static void hci_update_advertisements_enabled_for_current_roles(void){ 1234 if (hci_stack->le_advertisements_enabled){ 1235 // get number of active le slave connections 1236 int num_slave_connections = 0; 1237 btstack_linked_list_iterator_t it; 1238 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1239 while (btstack_linked_list_iterator_has_next(&it)){ 1240 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1241 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1242 if (con->state != OPEN) continue; 1243 if (con->role != HCI_ROLE_SLAVE) continue; 1244 if (!hci_is_le_connection(con)) continue; 1245 num_slave_connections++; 1246 } 1247 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1248 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1249 } else { 1250 hci_stack->le_advertisements_enabled_for_current_roles = false; 1251 } 1252 } 1253 #endif 1254 #endif 1255 1256 #ifdef ENABLE_CLASSIC 1257 static void gap_run_set_local_name(void){ 1258 hci_reserve_packet_buffer(); 1259 uint8_t * packet = hci_stack->hci_packet_buffer; 1260 // construct HCI Command and send 1261 uint16_t opcode = hci_write_local_name.opcode; 1262 hci_stack->last_cmd_opcode = opcode; 1263 packet[0] = opcode & 0xff; 1264 packet[1] = opcode >> 8; 1265 packet[2] = DEVICE_NAME_LEN; 1266 memset(&packet[3], 0, DEVICE_NAME_LEN); 1267 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1268 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1269 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1270 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1271 // expand '00:00:00:00:00:00' in name with bd_addr 1272 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1273 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1274 } 1275 1276 static void gap_run_set_eir_data(void){ 1277 hci_reserve_packet_buffer(); 1278 uint8_t * packet = hci_stack->hci_packet_buffer; 1279 // construct HCI Command in-place and send 1280 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1281 hci_stack->last_cmd_opcode = opcode; 1282 uint16_t offset = 0; 1283 packet[offset++] = opcode & 0xff; 1284 packet[offset++] = opcode >> 8; 1285 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1286 packet[offset++] = 0; // FEC not required 1287 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1288 if (hci_stack->eir_data){ 1289 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1290 ad_context_t context; 1291 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1292 uint8_t data_type = ad_iterator_get_data_type(&context); 1293 uint8_t size = ad_iterator_get_data_len(&context); 1294 const uint8_t *data = ad_iterator_get_data(&context); 1295 // copy item 1296 packet[offset++] = size + 1; 1297 packet[offset++] = data_type; 1298 memcpy(&packet[offset], data, size); 1299 // update name item 1300 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1301 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1302 } 1303 offset += size; 1304 } 1305 } else { 1306 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1307 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1308 packet[offset++] = bytes_to_copy + 1; 1309 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1310 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1311 // expand '00:00:00:00:00:00' in name with bd_addr 1312 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1313 } 1314 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1315 } 1316 1317 static void hci_run_gap_tasks_classic(void){ 1318 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1319 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1320 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1321 return; 1322 } 1323 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1324 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1325 gap_run_set_local_name(); 1326 return; 1327 } 1328 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1329 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1330 gap_run_set_eir_data(); 1331 return; 1332 } 1333 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1334 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1335 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1336 return; 1337 } 1338 // write page scan activity 1339 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1340 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1341 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1342 return; 1343 } 1344 // write page scan type 1345 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1346 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1347 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1348 return; 1349 } 1350 // send scan enable 1351 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1352 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1353 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1354 return; 1355 } 1356 } 1357 #endif 1358 1359 #ifndef HAVE_HOST_CONTROLLER_API 1360 1361 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1362 if (!hci_stack->config) return 0; 1363 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1364 // Limit baud rate for Broadcom chipsets to 3 mbps 1365 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1366 baud_rate = 3000000; 1367 } 1368 return baud_rate; 1369 } 1370 1371 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1372 UNUSED(ds); 1373 1374 switch (hci_stack->substate){ 1375 case HCI_INIT_W4_SEND_RESET: 1376 log_info("Resend HCI Reset"); 1377 hci_stack->substate = HCI_INIT_SEND_RESET; 1378 hci_stack->num_cmd_packets = 1; 1379 hci_run(); 1380 break; 1381 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1382 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1383 if (hci_stack->hci_transport->reset_link){ 1384 hci_stack->hci_transport->reset_link(); 1385 } 1386 1387 /* fall through */ 1388 1389 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1390 log_info("Resend HCI Reset - CSR Warm Boot"); 1391 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1392 hci_stack->num_cmd_packets = 1; 1393 hci_run(); 1394 break; 1395 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1396 if (hci_stack->hci_transport->set_baudrate){ 1397 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1398 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1399 hci_stack->hci_transport->set_baudrate(baud_rate); 1400 } 1401 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1402 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1403 if (hci_stack->hci_transport->reset_link){ 1404 log_info("Link Reset"); 1405 hci_stack->hci_transport->reset_link(); 1406 } 1407 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1408 hci_run(); 1409 } 1410 break; 1411 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1412 // otherwise continue 1413 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1414 hci_send_cmd(&hci_read_local_supported_commands); 1415 break; 1416 default: 1417 break; 1418 } 1419 } 1420 #endif 1421 1422 static void hci_initializing_next_state(void){ 1423 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1424 } 1425 1426 // assumption: hci_can_send_command_packet_now() == true 1427 static void hci_initializing_run(void){ 1428 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1429 1430 bool need_baud_change = false; 1431 1432 #ifndef HAVE_HOST_CONTROLLER_API 1433 need_baud_change = hci_stack->config 1434 && hci_stack->chipset 1435 && hci_stack->chipset->set_baudrate_command 1436 && hci_stack->hci_transport->set_baudrate 1437 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1438 #endif 1439 1440 switch (hci_stack->substate){ 1441 case HCI_INIT_SEND_RESET: 1442 hci_state_reset(); 1443 1444 #ifndef HAVE_HOST_CONTROLLER_API 1445 // prepare reset if command complete not received in 100ms 1446 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1447 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1448 btstack_run_loop_add_timer(&hci_stack->timeout); 1449 #endif 1450 // send command 1451 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1452 hci_send_cmd(&hci_reset); 1453 break; 1454 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1455 hci_send_cmd(&hci_read_local_version_information); 1456 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1457 break; 1458 case HCI_INIT_SEND_READ_LOCAL_NAME: 1459 hci_send_cmd(&hci_read_local_name); 1460 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1461 break; 1462 1463 #ifndef HAVE_HOST_CONTROLLER_API 1464 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1465 hci_state_reset(); 1466 // prepare reset if command complete not received in 100ms 1467 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1468 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1469 btstack_run_loop_add_timer(&hci_stack->timeout); 1470 // send command 1471 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1472 hci_send_cmd(&hci_reset); 1473 break; 1474 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1475 hci_state_reset(); 1476 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1477 hci_send_cmd(&hci_reset); 1478 break; 1479 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1480 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1481 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1482 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1483 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1484 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1485 break; 1486 } 1487 case HCI_INIT_SET_BD_ADDR: 1488 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1489 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1490 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1491 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1492 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1493 break; 1494 case HCI_INIT_SEND_BAUD_CHANGE: 1495 if (need_baud_change) { 1496 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1497 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1498 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1499 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1500 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1501 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1502 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1503 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1504 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1505 btstack_run_loop_add_timer(&hci_stack->timeout); 1506 } 1507 break; 1508 } 1509 1510 /* fall through */ 1511 1512 case HCI_INIT_CUSTOM_INIT: 1513 // Custom initialization 1514 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1515 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1516 bool send_cmd = false; 1517 switch (hci_stack->chipset_result){ 1518 case BTSTACK_CHIPSET_VALID_COMMAND: 1519 send_cmd = true; 1520 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1521 break; 1522 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1523 send_cmd = true; 1524 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1525 log_info("CSR Warm Boot"); 1526 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1527 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1528 btstack_run_loop_add_timer(&hci_stack->timeout); 1529 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1530 && hci_stack->config 1531 && hci_stack->chipset 1532 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1533 && hci_stack->hci_transport->set_baudrate 1534 && hci_transport_uart_get_main_baud_rate()){ 1535 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1536 } else { 1537 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1538 } 1539 break; 1540 default: 1541 break; 1542 } 1543 1544 if (send_cmd){ 1545 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1546 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1547 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1548 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1549 break; 1550 } 1551 log_info("Init script done"); 1552 1553 // Init script download on Broadcom chipsets causes: 1554 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1555 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1556 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1557 1558 // - baud rate to reset, restore UART baud rate if needed 1559 if (need_baud_change) { 1560 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1561 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1562 hci_stack->hci_transport->set_baudrate(baud_rate); 1563 } 1564 1565 uint16_t bcm_delay_ms = 300; 1566 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1567 // -> Work around: wait here. 1568 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1569 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1570 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1571 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1572 btstack_run_loop_add_timer(&hci_stack->timeout); 1573 break; 1574 } 1575 } 1576 /* fall through */ 1577 #endif 1578 1579 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1580 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1581 hci_send_cmd(&hci_read_local_supported_commands); 1582 break; 1583 case HCI_INIT_READ_BD_ADDR: 1584 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1585 hci_send_cmd(&hci_read_bd_addr); 1586 break; 1587 case HCI_INIT_READ_BUFFER_SIZE: 1588 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1589 hci_send_cmd(&hci_read_buffer_size); 1590 break; 1591 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1592 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1593 hci_send_cmd(&hci_read_local_supported_features); 1594 break; 1595 1596 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1597 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1598 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1599 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1600 break; 1601 case HCI_INIT_HOST_BUFFER_SIZE: 1602 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1603 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1604 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1605 break; 1606 #endif 1607 1608 case HCI_INIT_SET_EVENT_MASK: 1609 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1610 if (hci_le_supported()){ 1611 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1612 } else { 1613 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1614 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1615 } 1616 break; 1617 1618 #ifdef ENABLE_CLASSIC 1619 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1620 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1621 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1622 break; 1623 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1624 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1625 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1626 break; 1627 case HCI_INIT_WRITE_INQUIRY_MODE: 1628 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1629 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1630 break; 1631 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1632 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1633 hci_stack->secure_connections_active = true; 1634 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1635 break; 1636 // only sent if ENABLE_SCO_OVER_HCI is defined 1637 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1638 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1639 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1640 break; 1641 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1642 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1643 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1644 break; 1645 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1646 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1647 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1648 #ifdef ENABLE_SCO_OVER_HCI 1649 log_info("BCM: Route SCO data via HCI transport"); 1650 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1651 #endif 1652 #ifdef ENABLE_SCO_OVER_PCM 1653 log_info("BCM: Route SCO data via PCM interface"); 1654 #ifdef ENABLE_BCM_PCM_WBS 1655 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1656 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1657 #else 1658 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1659 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1660 #endif 1661 #endif 1662 break; 1663 #ifdef ENABLE_SCO_OVER_PCM 1664 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1665 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1666 log_info("BCM: Config PCM interface for I2S"); 1667 #ifdef ENABLE_BCM_PCM_WBS 1668 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1669 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1670 #else 1671 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1672 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1673 #endif 1674 break; 1675 #endif 1676 #endif 1677 1678 #ifdef ENABLE_BLE 1679 // LE INIT 1680 case HCI_INIT_LE_READ_BUFFER_SIZE: 1681 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1682 hci_send_cmd(&hci_le_read_buffer_size); 1683 break; 1684 case HCI_INIT_LE_SET_EVENT_MASK: 1685 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1686 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1687 break; 1688 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1689 // LE Supported Host = 1, Simultaneous Host = 0 1690 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1691 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1692 break; 1693 #endif 1694 1695 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1696 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1697 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1698 hci_send_cmd(&hci_le_read_maximum_data_length); 1699 break; 1700 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1701 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1702 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1703 break; 1704 #endif 1705 1706 #ifdef ENABLE_LE_CENTRAL 1707 case HCI_INIT_READ_WHITE_LIST_SIZE: 1708 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1709 hci_send_cmd(&hci_le_read_white_list_size); 1710 break; 1711 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1712 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1713 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); 1714 break; 1715 #endif 1716 default: 1717 return; 1718 } 1719 } 1720 1721 static void hci_init_done(void){ 1722 #ifdef ENABLE_CLASSIC 1723 // init sequence complete, check if GAP Tasks are completed 1724 if (hci_stack->gap_tasks != 0) { 1725 hci_run_gap_tasks_classic(); 1726 return; 1727 } 1728 #endif 1729 1730 // done. tell the app 1731 log_info("hci_init_done -> HCI_STATE_WORKING"); 1732 hci_stack->state = HCI_STATE_WORKING; 1733 hci_emit_state(); 1734 hci_run(); 1735 } 1736 1737 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1738 bool command_completed = false; 1739 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1740 uint16_t opcode = little_endian_read_16(packet,3); 1741 if (opcode == hci_stack->last_cmd_opcode){ 1742 command_completed = true; 1743 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1744 } else { 1745 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1746 } 1747 } 1748 1749 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1750 uint8_t status = packet[2]; 1751 uint16_t opcode = little_endian_read_16(packet,4); 1752 if (opcode == hci_stack->last_cmd_opcode){ 1753 if (status){ 1754 command_completed = true; 1755 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1756 } else { 1757 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1758 } 1759 } else { 1760 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1761 } 1762 } 1763 #ifndef HAVE_HOST_CONTROLLER_API 1764 // Vendor == CSR 1765 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1766 // TODO: track actual command 1767 command_completed = true; 1768 } 1769 1770 // Vendor == Toshiba 1771 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1772 // TODO: track actual command 1773 command_completed = true; 1774 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1775 hci_stack->num_cmd_packets = 1; 1776 } 1777 #endif 1778 1779 return command_completed; 1780 } 1781 1782 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1783 1784 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1785 1786 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1787 1788 #ifndef HAVE_HOST_CONTROLLER_API 1789 1790 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1791 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1792 // 1793 // HCI Reset 1794 // Timeout 100 ms 1795 // HCI Reset 1796 // Command Complete Reset 1797 // HCI Read Local Version Information 1798 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1799 // hang... 1800 // 1801 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1802 if (!command_completed 1803 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1804 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1805 1806 uint16_t opcode = little_endian_read_16(packet,3); 1807 if (opcode == hci_reset.opcode){ 1808 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1809 return; 1810 } 1811 } 1812 1813 // CSR & H5 1814 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1815 if (!command_completed 1816 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1817 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1818 1819 uint16_t opcode = little_endian_read_16(packet,3); 1820 if (opcode == hci_reset.opcode){ 1821 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1822 return; 1823 } 1824 } 1825 1826 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1827 // fix: Correct substate and behave as command below 1828 if (command_completed){ 1829 switch (hci_stack->substate){ 1830 case HCI_INIT_SEND_RESET: 1831 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1832 break; 1833 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1834 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1835 break; 1836 default: 1837 break; 1838 } 1839 } 1840 1841 #endif 1842 1843 if (!command_completed) return; 1844 1845 bool need_baud_change = false; 1846 bool need_addr_change = false; 1847 1848 #ifndef HAVE_HOST_CONTROLLER_API 1849 need_baud_change = hci_stack->config 1850 && hci_stack->chipset 1851 && hci_stack->chipset->set_baudrate_command 1852 && hci_stack->hci_transport->set_baudrate 1853 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1854 1855 need_addr_change = hci_stack->custom_bd_addr_set 1856 && hci_stack->chipset 1857 && hci_stack->chipset->set_bd_addr_command; 1858 #endif 1859 1860 switch(hci_stack->substate){ 1861 1862 #ifndef HAVE_HOST_CONTROLLER_API 1863 case HCI_INIT_SEND_RESET: 1864 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1865 // fix: just correct substate and behave as command below 1866 1867 /* fall through */ 1868 #endif 1869 1870 case HCI_INIT_W4_SEND_RESET: 1871 btstack_run_loop_remove_timer(&hci_stack->timeout); 1872 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1873 return; 1874 1875 #ifndef HAVE_HOST_CONTROLLER_API 1876 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1877 // for STLC2500D, baud rate change already happened. 1878 // for others, baud rate gets changed now 1879 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1880 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1881 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1882 hci_stack->hci_transport->set_baudrate(baud_rate); 1883 } 1884 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1885 return; 1886 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1887 btstack_run_loop_remove_timer(&hci_stack->timeout); 1888 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1889 return; 1890 case HCI_INIT_W4_CUSTOM_INIT: 1891 // repeat custom init 1892 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1893 return; 1894 #endif 1895 1896 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1897 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1898 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1899 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1900 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1901 return; 1902 } 1903 if (need_addr_change){ 1904 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1905 return; 1906 } 1907 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1908 return; 1909 #ifndef HAVE_HOST_CONTROLLER_API 1910 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1911 if (need_baud_change){ 1912 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1913 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1914 hci_stack->hci_transport->set_baudrate(baud_rate); 1915 } 1916 if (need_addr_change){ 1917 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1918 return; 1919 } 1920 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1921 return; 1922 case HCI_INIT_W4_SET_BD_ADDR: 1923 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1924 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1925 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1926 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1927 return; 1928 } 1929 // skipping st warm boot 1930 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1931 return; 1932 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1933 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1934 return; 1935 #endif 1936 case HCI_INIT_W4_READ_BD_ADDR: 1937 // only read buffer size if supported 1938 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1939 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1940 return; 1941 } 1942 // skipping read buffer size 1943 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1944 return; 1945 case HCI_INIT_W4_SET_EVENT_MASK: 1946 // skip Classic init commands for LE only chipsets 1947 if (!hci_classic_supported()){ 1948 #ifdef ENABLE_BLE 1949 if (hci_le_supported()){ 1950 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1951 return; 1952 } 1953 #endif 1954 log_error("Neither BR/EDR nor LE supported"); 1955 hci_init_done(); 1956 return; 1957 } 1958 if (!gap_ssp_supported()){ 1959 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1960 return; 1961 } 1962 break; 1963 #ifdef ENABLE_BLE 1964 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1965 // skip write le host if not supported (e.g. on LE only EM9301) 1966 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1967 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1968 return; 1969 1970 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1971 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1972 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1973 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1974 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1975 return; 1976 } 1977 // explicit fall through to reduce repetitions 1978 1979 #ifdef ENABLE_LE_CENTRAL 1980 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1981 #else 1982 hci_init_done(); 1983 #endif 1984 return; 1985 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1986 1987 #endif /* ENABLE_BLE */ 1988 1989 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1990 // skip write secure connections host support if not supported or disabled 1991 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1992 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1993 return; 1994 } 1995 break; 1996 1997 #ifdef ENABLE_SCO_OVER_HCI 1998 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 1999 // skip write synchronous flow control if not supported 2000 if (hci_stack->local_supported_commands[0] & 0x04) break; 2001 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 2002 2003 /* fall through */ 2004 2005 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2006 // skip write default erroneous data reporting if not supported 2007 if (hci_stack->local_supported_commands[0] & 0x08) break; 2008 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 2009 2010 /* fall through */ 2011 2012 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 2013 // skip bcm set sco pcm config on non-Broadcom chipsets 2014 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 2015 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2016 2017 /* fall through */ 2018 2019 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 2020 if (!hci_le_supported()){ 2021 // SKIP LE init for Classic only configuration 2022 hci_init_done(); 2023 return; 2024 } 2025 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2026 break; 2027 2028 #else /* !ENABLE_SCO_OVER_HCI */ 2029 2030 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 2031 #ifdef ENABLE_SCO_OVER_PCM 2032 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 2033 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 2034 return; 2035 } 2036 #endif 2037 /* fall through */ 2038 2039 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2040 #ifdef ENABLE_BLE 2041 if (hci_le_supported()){ 2042 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 2043 return; 2044 } 2045 #endif 2046 // SKIP LE init for Classic only configuration 2047 hci_init_done(); 2048 return; 2049 #endif /* ENABLE_SCO_OVER_HCI */ 2050 2051 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 2052 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 2053 // Response to command before init done state -> init done 2054 case (HCI_INIT_DONE-1): 2055 hci_init_done(); 2056 return; 2057 #endif 2058 2059 default: 2060 break; 2061 } 2062 hci_initializing_next_state(); 2063 } 2064 2065 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2066 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2067 bd_addr_t bd_address; 2068 (void)memcpy(&bd_address, conn->address, 6); 2069 2070 #ifdef ENABLE_CLASSIC 2071 // cache needed data 2072 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2073 #endif 2074 2075 // connection failed, remove entry 2076 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2077 btstack_memory_hci_connection_free( conn ); 2078 2079 #ifdef ENABLE_CLASSIC 2080 // notify client if dedicated bonding 2081 if (notify_dedicated_bonding_failed){ 2082 log_info("hci notify_dedicated_bonding_failed"); 2083 hci_emit_dedicated_bonding_result(bd_address, status); 2084 } 2085 2086 // if authentication error, also delete link key 2087 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2088 gap_drop_link_key_for_bd_addr(bd_address); 2089 } 2090 #else 2091 UNUSED(status); 2092 #endif 2093 } 2094 2095 #ifdef ENABLE_CLASSIC 2096 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2097 // SSP Controller 2098 if (features[6] & (1 << 3)){ 2099 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2100 } 2101 // eSCO 2102 if (features[3] & (1<<7)){ 2103 conn->remote_supported_features[0] |= 1; 2104 } 2105 // Extended features 2106 if (features[7] & (1<<7)){ 2107 conn->remote_supported_features[0] |= 2; 2108 } 2109 } 2110 2111 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2112 // SSP Host 2113 if (features[0] & (1 << 0)){ 2114 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2115 } 2116 // SC Host 2117 if (features[0] & (1 << 3)){ 2118 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2119 } 2120 } 2121 2122 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2123 // SC Controller 2124 if (features[1] & (1 << 0)){ 2125 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2126 } 2127 } 2128 2129 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2130 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2131 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2132 if (conn->bonding_flags & BONDING_DEDICATED){ 2133 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2134 } 2135 } 2136 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2137 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2138 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2139 } 2140 2141 #endif 2142 2143 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2144 // handle BT initialization 2145 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2146 hci_initializing_event_handler(packet, size); 2147 } 2148 2149 // help with BT sleep 2150 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2151 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2152 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2153 hci_initializing_next_state(); 2154 } 2155 } 2156 2157 #ifdef ENABLE_CLASSIC 2158 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2159 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2160 conn->encryption_key_size = encryption_key_size; 2161 2162 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2163 conn->requested_security_level = LEVEL_0; 2164 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2165 return; 2166 } 2167 2168 // Request Authentication if not already done 2169 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2170 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2171 } 2172 #endif 2173 2174 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2175 UNUSED(size); 2176 2177 uint16_t manufacturer; 2178 #ifdef ENABLE_CLASSIC 2179 hci_con_handle_t handle; 2180 hci_connection_t * conn; 2181 uint8_t status; 2182 #endif 2183 // get num cmd packets - limit to 1 to reduce complexity 2184 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2185 2186 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2187 switch (opcode){ 2188 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2189 if (packet[5]) break; 2190 // terminate, name 248 chars 2191 packet[6+248] = 0; 2192 log_info("local name: %s", &packet[6]); 2193 break; 2194 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2195 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2196 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2197 uint16_t acl_len = little_endian_read_16(packet, 6); 2198 uint16_t sco_len = packet[8]; 2199 2200 // determine usable ACL/SCO payload size 2201 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2202 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2203 2204 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2205 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2206 2207 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2208 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2209 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2210 } 2211 break; 2212 case HCI_OPCODE_HCI_READ_RSSI: 2213 if (packet[5] == ERROR_CODE_SUCCESS){ 2214 uint8_t event[5]; 2215 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2216 event[1] = 3; 2217 (void)memcpy(&event[2], &packet[6], 3); 2218 hci_emit_event(event, sizeof(event), 1); 2219 } 2220 break; 2221 #ifdef ENABLE_BLE 2222 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2223 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2224 hci_stack->le_acl_packets_total_num = packet[8]; 2225 // determine usable ACL payload size 2226 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2227 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2228 } 2229 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2230 break; 2231 #endif 2232 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2233 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2234 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2235 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2236 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); 2237 break; 2238 #endif 2239 #ifdef ENABLE_LE_CENTRAL 2240 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2241 hci_stack->le_whitelist_capacity = packet[6]; 2242 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2243 break; 2244 #endif 2245 case HCI_OPCODE_HCI_READ_BD_ADDR: 2246 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2247 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)); 2248 #ifdef ENABLE_CLASSIC 2249 if (hci_stack->link_key_db){ 2250 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2251 } 2252 #endif 2253 break; 2254 #ifdef ENABLE_CLASSIC 2255 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2256 hci_emit_discoverable_enabled(hci_stack->discoverable); 2257 break; 2258 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2259 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2260 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2261 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2262 hci_emit_event(event, sizeof(event), 1); 2263 } 2264 break; 2265 #endif 2266 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2267 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2268 2269 #ifdef ENABLE_CLASSIC 2270 // determine usable ACL packet types based on host buffer size and supported features 2271 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2272 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2273 #endif 2274 // Classic/LE 2275 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2276 break; 2277 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2278 manufacturer = little_endian_read_16(packet, 10); 2279 // map Cypress to Broadcom 2280 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2281 log_info("Treat Cypress as Broadcom"); 2282 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2283 little_endian_store_16(packet, 10, manufacturer); 2284 } 2285 hci_stack->manufacturer = manufacturer; 2286 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2287 break; 2288 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2289 hci_stack->local_supported_commands[0] = 2290 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2291 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2292 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2293 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2294 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2295 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2296 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2297 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2298 hci_stack->local_supported_commands[1] = 2299 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2300 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2301 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2302 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2303 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2304 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2305 break; 2306 #ifdef ENABLE_CLASSIC 2307 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2308 if (packet[5]) return; 2309 hci_stack->synchronous_flow_control_enabled = 1; 2310 break; 2311 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2312 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2313 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2314 conn = hci_connection_for_handle(handle); 2315 if (conn != NULL) { 2316 uint8_t key_size = 0; 2317 if (status == 0){ 2318 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2319 log_info("Handle %04x key Size: %u", handle, key_size); 2320 } else { 2321 key_size = 1; 2322 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2323 } 2324 hci_handle_read_encryption_key_size_complete(conn, key_size); 2325 } 2326 break; 2327 // assert pairing complete event is emitted. 2328 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2329 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2330 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2331 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2332 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2333 // lookup connection by gap pairing addr 2334 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2335 if (conn == NULL) break; 2336 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2337 break; 2338 2339 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2340 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2341 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2342 uint8_t event[67]; 2343 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2344 event[1] = 65; 2345 (void)memset(&event[2], 0, 65); 2346 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2347 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2348 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2349 event[2] = 3; 2350 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2351 } else { 2352 event[2] = 1; 2353 } 2354 } 2355 hci_emit_event(event, sizeof(event), 0); 2356 break; 2357 } 2358 2359 // note: only needed if user does not provide OOB data 2360 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2361 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2362 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2363 if (conn == NULL) break; 2364 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2365 break; 2366 #endif 2367 #endif 2368 default: 2369 break; 2370 } 2371 } 2372 2373 #ifdef ENABLE_BLE 2374 static void event_handle_le_connection_complete(const uint8_t * packet){ 2375 bd_addr_t addr; 2376 bd_addr_type_t addr_type; 2377 hci_connection_t * conn; 2378 2379 // Connection management 2380 reverse_bd_addr(&packet[8], addr); 2381 addr_type = (bd_addr_type_t)packet[7]; 2382 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2383 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2384 2385 #ifdef ENABLE_LE_CENTRAL 2386 // handle error: error is reported only to the initiator -> outgoing connection 2387 if (packet[3]){ 2388 2389 // handle cancelled outgoing connection 2390 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2391 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2392 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2393 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2394 // reset state 2395 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2396 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2397 // get outgoing connection conn struct for direct connect 2398 conn = gap_get_outgoing_connection(); 2399 } 2400 2401 // outgoing le connection establishment is done 2402 if (conn){ 2403 // remove entry 2404 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2405 btstack_memory_hci_connection_free( conn ); 2406 } 2407 return; 2408 } 2409 #endif 2410 2411 // on success, both hosts receive connection complete event 2412 if (packet[6] == HCI_ROLE_MASTER){ 2413 #ifdef ENABLE_LE_CENTRAL 2414 // if we're master on an le connection, it was an outgoing connection and we're done with it 2415 // note: no hci_connection_t object exists yet for connect with whitelist 2416 if (hci_is_le_connection_type(addr_type)){ 2417 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2418 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2419 } 2420 #endif 2421 } else { 2422 #ifdef ENABLE_LE_PERIPHERAL 2423 // if we're slave, it was an incoming connection, advertisements have stopped 2424 hci_stack->le_advertisements_active = false; 2425 #endif 2426 } 2427 2428 // LE connections are auto-accepted, so just create a connection if there isn't one already 2429 if (!conn){ 2430 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2431 } 2432 2433 // no memory, sorry. 2434 if (!conn){ 2435 return; 2436 } 2437 2438 conn->state = OPEN; 2439 conn->role = packet[6]; 2440 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2441 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2442 2443 #ifdef ENABLE_LE_PERIPHERAL 2444 if (packet[6] == HCI_ROLE_SLAVE){ 2445 hci_update_advertisements_enabled_for_current_roles(); 2446 } 2447 #endif 2448 2449 // init unenhanced att bearer mtu 2450 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2451 conn->att_connection.mtu_exchanged = false; 2452 2453 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2454 2455 // restart timer 2456 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2457 // btstack_run_loop_add_timer(&conn->timeout); 2458 2459 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2460 2461 hci_emit_nr_connections_changed(); 2462 } 2463 #endif 2464 2465 #ifdef ENABLE_CLASSIC 2466 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){ 2467 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2468 // LEVEL_4 is tested by l2cap 2469 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2470 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2471 if (level >= LEVEL_3){ 2472 // MITM not possible without keyboard or display 2473 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2474 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2475 2476 // MITM possible if one side has keyboard and the other has keyboard or display 2477 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2478 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2479 2480 // MITM not possible if one side has only display and other side has no keyboard 2481 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2482 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2483 } 2484 // LEVEL 2 requires SSP, which is a given 2485 return true; 2486 } 2487 2488 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2489 uint16_t i; 2490 for (i=0; i < size ; i++){ 2491 if (data[i] != 0) { 2492 return false; 2493 } 2494 } 2495 return true; 2496 } 2497 2498 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2499 // get requested security level 2500 gap_security_level_t requested_security_level = conn->requested_security_level; 2501 if (hci_stack->gap_secure_connections_only_mode){ 2502 requested_security_level = LEVEL_4; 2503 } 2504 2505 // assess security: LEVEL 4 requires SC 2506 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2507 if ((requested_security_level == LEVEL_4) && 2508 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2509 !hci_remote_sc_enabled(conn)){ 2510 log_info("Level 4 required, but SC not supported -> abort"); 2511 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2512 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2513 return; 2514 } 2515 2516 // assess security based on io capabilities 2517 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2518 // responder: fully validate io caps of both sides as well as OOB data 2519 bool security_possible = false; 2520 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2521 2522 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2523 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2524 // so we merge the OOB data availability 2525 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2526 if (conn->classic_oob_c_192 != NULL){ 2527 have_oob_data |= 1; 2528 } 2529 if (conn->classic_oob_c_256 != NULL){ 2530 have_oob_data |= 2; 2531 } 2532 // for up to Level 3, either P-192 as well as P-256 will do 2533 // 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 2534 // if remote does not SC, we should not receive P-256 data either 2535 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2536 security_possible = true; 2537 } 2538 // for Level 4, P-256 is needed 2539 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2540 security_possible = true; 2541 } 2542 #endif 2543 2544 if (security_possible == false){ 2545 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2546 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2547 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2548 return; 2549 } 2550 } else { 2551 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2552 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2553 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2554 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2555 log_info("Level 3+ required, but no input/output -> abort"); 2556 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2557 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2558 return; 2559 } 2560 #endif 2561 #endif 2562 } 2563 2564 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2565 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2566 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2567 } else { 2568 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2569 } 2570 #endif 2571 } 2572 2573 #endif 2574 2575 static void event_handler(uint8_t *packet, uint16_t size){ 2576 2577 uint16_t event_length = packet[1]; 2578 2579 // assert packet is complete 2580 if (size != (event_length + 2u)){ 2581 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2582 return; 2583 } 2584 2585 bd_addr_type_t addr_type; 2586 hci_con_handle_t handle; 2587 hci_connection_t * conn; 2588 int i; 2589 int create_connection_cmd; 2590 2591 #ifdef ENABLE_CLASSIC 2592 hci_link_type_t link_type; 2593 bd_addr_t addr; 2594 #endif 2595 2596 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2597 2598 switch (hci_event_packet_get_type(packet)) { 2599 2600 case HCI_EVENT_COMMAND_COMPLETE: 2601 handle_command_complete_event(packet, size); 2602 break; 2603 2604 case HCI_EVENT_COMMAND_STATUS: 2605 // get num cmd packets - limit to 1 to reduce complexity 2606 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2607 2608 // check command status to detected failed outgoing connections 2609 create_connection_cmd = 0; 2610 #ifdef ENABLE_CLASSIC 2611 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2612 create_connection_cmd = 1; 2613 } 2614 #endif 2615 #ifdef ENABLE_LE_CENTRAL 2616 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2617 create_connection_cmd = 1; 2618 } 2619 #endif 2620 if (create_connection_cmd) { 2621 uint8_t status = hci_event_command_status_get_status(packet); 2622 addr_type = hci_stack->outgoing_addr_type; 2623 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2624 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); 2625 2626 // reset outgoing address info 2627 memset(hci_stack->outgoing_addr, 0, 6); 2628 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2629 2630 // on error 2631 if (status != ERROR_CODE_SUCCESS){ 2632 #ifdef ENABLE_LE_CENTRAL 2633 if (hci_is_le_connection_type(addr_type)){ 2634 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2635 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2636 } 2637 #endif 2638 // error => outgoing connection failed 2639 if (conn != NULL){ 2640 hci_handle_connection_failed(conn, status); 2641 } 2642 } 2643 } 2644 2645 #ifdef ENABLE_CLASSIC 2646 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2647 uint8_t status = hci_event_command_status_get_status(packet); 2648 log_info("command status (inquiry), status %x", status); 2649 if (status == ERROR_CODE_SUCCESS) { 2650 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2651 } else { 2652 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2653 } 2654 } 2655 #endif 2656 break; 2657 2658 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2659 if (size < 3) return; 2660 uint16_t num_handles = packet[2]; 2661 if (size != (3u + num_handles * 4u)) return; 2662 uint16_t offset = 3; 2663 for (i=0; i<num_handles;i++){ 2664 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2665 offset += 2u; 2666 uint16_t num_packets = little_endian_read_16(packet, offset); 2667 offset += 2u; 2668 2669 conn = hci_connection_for_handle(handle); 2670 if (!conn){ 2671 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2672 continue; 2673 } 2674 2675 if (conn->num_packets_sent >= num_packets){ 2676 conn->num_packets_sent -= num_packets; 2677 } else { 2678 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2679 conn->num_packets_sent = 0; 2680 } 2681 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2682 2683 #ifdef ENABLE_CLASSIC 2684 // For SCO, we do the can_send_now_check here 2685 hci_notify_if_sco_can_send_now(); 2686 #endif 2687 } 2688 break; 2689 } 2690 2691 #ifdef ENABLE_CLASSIC 2692 case HCI_EVENT_INQUIRY_COMPLETE: 2693 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2694 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2695 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2696 hci_emit_event(event, sizeof(event), 1); 2697 } 2698 break; 2699 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2700 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2701 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2702 } 2703 break; 2704 case HCI_EVENT_CONNECTION_REQUEST: 2705 reverse_bd_addr(&packet[2], addr); 2706 link_type = (hci_link_type_t) packet[11]; 2707 2708 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2709 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2710 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2711 bd_addr_copy(hci_stack->decline_addr, addr); 2712 break; 2713 } 2714 2715 if (hci_stack->gap_classic_accept_callback != NULL){ 2716 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2717 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2718 bd_addr_copy(hci_stack->decline_addr, addr); 2719 break; 2720 } 2721 } 2722 2723 // TODO: eval COD 8-10 2724 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2725 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2726 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2727 if (!conn) { 2728 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2729 } 2730 if (!conn) { 2731 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2732 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2733 bd_addr_copy(hci_stack->decline_addr, addr); 2734 break; 2735 } 2736 conn->role = HCI_ROLE_SLAVE; 2737 conn->state = RECEIVED_CONNECTION_REQUEST; 2738 // store info about eSCO 2739 if (link_type == HCI_LINK_TYPE_ESCO){ 2740 conn->remote_supported_features[0] |= 1; 2741 } 2742 hci_run(); 2743 break; 2744 2745 case HCI_EVENT_CONNECTION_COMPLETE: 2746 // Connection management 2747 reverse_bd_addr(&packet[5], addr); 2748 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2749 addr_type = BD_ADDR_TYPE_ACL; 2750 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2751 if (conn) { 2752 if (!packet[2]){ 2753 conn->state = OPEN; 2754 conn->con_handle = little_endian_read_16(packet, 3); 2755 2756 // queue get remote feature 2757 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2758 2759 // queue set supervision timeout if we're master 2760 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2761 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2762 } 2763 2764 // restart timer 2765 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2766 btstack_run_loop_add_timer(&conn->timeout); 2767 2768 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2769 2770 hci_emit_nr_connections_changed(); 2771 } else { 2772 // connection failed 2773 hci_handle_connection_failed(conn, packet[2]); 2774 } 2775 } 2776 break; 2777 2778 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2779 reverse_bd_addr(&packet[5], addr); 2780 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2781 if (packet[2]){ 2782 // connection failed 2783 break; 2784 } 2785 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2786 if (!conn) { 2787 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2788 } 2789 if (!conn) { 2790 break; 2791 } 2792 conn->state = OPEN; 2793 conn->con_handle = little_endian_read_16(packet, 3); 2794 2795 #ifdef ENABLE_SCO_OVER_HCI 2796 // update SCO 2797 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2798 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2799 } 2800 // trigger can send now 2801 if (hci_have_usb_transport()){ 2802 hci_stack->sco_can_send_now = true; 2803 } 2804 #endif 2805 #ifdef HAVE_SCO_TRANSPORT 2806 // configure sco transport 2807 if (hci_stack->sco_transport != NULL){ 2808 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2809 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2810 } 2811 #endif 2812 break; 2813 2814 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2815 handle = little_endian_read_16(packet, 3); 2816 conn = hci_connection_for_handle(handle); 2817 if (!conn) break; 2818 if (!packet[2]){ 2819 const uint8_t * features = &packet[5]; 2820 hci_handle_remote_features_page_0(conn, features); 2821 2822 // read extended features if possible 2823 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2824 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2825 break; 2826 } 2827 } 2828 hci_handle_remote_features_received(conn); 2829 break; 2830 2831 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2832 handle = little_endian_read_16(packet, 3); 2833 conn = hci_connection_for_handle(handle); 2834 if (!conn) break; 2835 // status = ok, page = 1 2836 if (!packet[2]) { 2837 uint8_t page_number = packet[5]; 2838 uint8_t maximum_page_number = packet[6]; 2839 const uint8_t * features = &packet[7]; 2840 bool done = false; 2841 switch (page_number){ 2842 case 1: 2843 hci_handle_remote_features_page_1(conn, features); 2844 if (maximum_page_number >= 2){ 2845 // get Secure Connections (Controller) from Page 2 if available 2846 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2847 } else { 2848 // otherwise, assume SC (Controller) == SC (Host) 2849 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2850 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2851 } 2852 done = true; 2853 } 2854 break; 2855 case 2: 2856 hci_handle_remote_features_page_2(conn, features); 2857 done = true; 2858 break; 2859 default: 2860 break; 2861 } 2862 if (!done) break; 2863 } 2864 hci_handle_remote_features_received(conn); 2865 break; 2866 2867 case HCI_EVENT_LINK_KEY_REQUEST: 2868 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2869 hci_event_link_key_request_get_bd_addr(packet, addr); 2870 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2871 if (!conn) break; 2872 2873 // lookup link key in db if not cached 2874 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2875 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2876 } 2877 2878 // response sent by hci_run() 2879 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2880 #endif 2881 break; 2882 2883 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2884 hci_event_link_key_request_get_bd_addr(packet, addr); 2885 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2886 if (!conn) break; 2887 2888 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2889 2890 // CVE-2020-26555: ignore NULL link key 2891 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2892 if (btstack_is_null(&packet[8], 16)) break; 2893 2894 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2895 // Change Connection Encryption keeps link key type 2896 if (link_key_type != CHANGED_COMBINATION_KEY){ 2897 conn->link_key_type = link_key_type; 2898 } 2899 2900 // cache link key. link keys stored in little-endian format for legacy reasons 2901 memcpy(&conn->link_key, &packet[8], 16); 2902 2903 // only store link key: 2904 // - if bondable enabled 2905 if (hci_stack->bondable == false) break; 2906 // - if security level sufficient 2907 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2908 // - for SSP, also check if remote side requested bonding as well 2909 if (conn->link_key_type != COMBINATION_KEY){ 2910 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2911 if (!remote_bonding){ 2912 break; 2913 } 2914 } 2915 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2916 break; 2917 } 2918 2919 case HCI_EVENT_PIN_CODE_REQUEST: 2920 hci_event_pin_code_request_get_bd_addr(packet, addr); 2921 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2922 if (!conn) break; 2923 2924 hci_pairing_started(conn, false); 2925 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2926 if (!hci_stack->bondable ){ 2927 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2928 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2929 hci_run(); 2930 return; 2931 } 2932 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2933 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2934 log_info("Level 4 required, but SC not supported -> abort"); 2935 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2936 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2937 hci_run(); 2938 return; 2939 } 2940 break; 2941 2942 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2943 hci_event_io_capability_response_get_bd_addr(packet, addr); 2944 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2945 if (!conn) break; 2946 2947 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2948 hci_pairing_started(conn, true); 2949 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2950 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2951 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2952 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2953 #endif 2954 break; 2955 2956 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2957 hci_event_io_capability_response_get_bd_addr(packet, addr); 2958 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2959 if (!conn) break; 2960 2961 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2962 hci_connection_timestamp(conn); 2963 hci_pairing_started(conn, true); 2964 break; 2965 2966 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2967 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2968 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2969 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2970 if (!conn) break; 2971 2972 hci_connection_timestamp(conn); 2973 2974 hci_pairing_started(conn, true); 2975 2976 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2977 break; 2978 #endif 2979 2980 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2981 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2982 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2983 if (!conn) break; 2984 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2985 if (hci_stack->ssp_auto_accept){ 2986 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2987 }; 2988 } else { 2989 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2990 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2991 // don't forward event to app 2992 hci_run(); 2993 return; 2994 } 2995 break; 2996 2997 case HCI_EVENT_USER_PASSKEY_REQUEST: 2998 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2999 if (hci_stack->ssp_auto_accept){ 3000 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3001 }; 3002 break; 3003 3004 case HCI_EVENT_MODE_CHANGE: 3005 handle = hci_event_mode_change_get_handle(packet); 3006 conn = hci_connection_for_handle(handle); 3007 if (!conn) break; 3008 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3009 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3010 break; 3011 #endif 3012 3013 case HCI_EVENT_ENCRYPTION_CHANGE: 3014 handle = hci_event_encryption_change_get_connection_handle(packet); 3015 conn = hci_connection_for_handle(handle); 3016 if (!conn) break; 3017 if (hci_event_encryption_change_get_status(packet) == 0u) { 3018 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3019 if (encryption_enabled){ 3020 if (hci_is_le_connection(conn)){ 3021 // For LE, we accept connection as encrypted 3022 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3023 } 3024 #ifdef ENABLE_CLASSIC 3025 else { 3026 3027 // dedicated bonding: send result and disconnect 3028 if (conn->bonding_flags & BONDING_DEDICATED){ 3029 conn->bonding_flags &= ~BONDING_DEDICATED; 3030 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3031 conn->bonding_status = packet[2]; 3032 break; 3033 } 3034 3035 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3036 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3037 bool connected_uses_aes_ccm = encryption_enabled == 2; 3038 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3039 log_info("SC during pairing, but only E0 now -> abort"); 3040 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3041 break; 3042 } 3043 3044 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3045 if (connected_uses_aes_ccm){ 3046 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3047 } 3048 3049 #ifdef ENABLE_TESTING_SUPPORT 3050 // work around for issue with PTS dongle 3051 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3052 #endif 3053 3054 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3055 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3056 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3057 } else { 3058 // if not, pretend everything is perfect 3059 hci_handle_read_encryption_key_size_complete(conn, 16); 3060 } 3061 } 3062 #endif 3063 } else { 3064 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3065 } 3066 } 3067 3068 break; 3069 3070 #ifdef ENABLE_CLASSIC 3071 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3072 handle = hci_event_authentication_complete_get_connection_handle(packet); 3073 conn = hci_connection_for_handle(handle); 3074 if (!conn) break; 3075 3076 // clear authentication active flag 3077 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3078 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3079 3080 // authenticated only if auth status == 0 3081 if (hci_event_authentication_complete_get_status(packet) == 0){ 3082 // authenticated 3083 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3084 3085 // If not already encrypted, start encryption 3086 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3087 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3088 break; 3089 } 3090 } 3091 3092 // emit updated security level 3093 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3094 break; 3095 3096 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3097 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3098 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3099 if (!conn) break; 3100 3101 // treat successfully paired connection as authenticated 3102 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3103 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3104 } 3105 3106 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3107 break; 3108 #endif 3109 3110 // HCI_EVENT_DISCONNECTION_COMPLETE 3111 // has been split, to first notify stack before shutting connection down 3112 // see end of function, too. 3113 case HCI_EVENT_DISCONNECTION_COMPLETE: 3114 if (packet[2]) break; // status != 0 3115 handle = little_endian_read_16(packet, 3); 3116 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3117 if (hci_stack->acl_fragmentation_total_size > 0u) { 3118 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3119 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3120 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3121 hci_stack->acl_fragmentation_total_size = 0; 3122 hci_stack->acl_fragmentation_pos = 0; 3123 if (release_buffer){ 3124 hci_release_packet_buffer(); 3125 } 3126 } 3127 } 3128 3129 conn = hci_connection_for_handle(handle); 3130 if (!conn) break; 3131 #ifdef ENABLE_CLASSIC 3132 // pairing failed if it was ongoing 3133 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3134 #endif 3135 3136 // emit dedicatd bonding event 3137 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3138 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3139 } 3140 3141 // mark connection for shutdown, stop timers, reset state 3142 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3143 hci_connection_stop_timer(conn); 3144 hci_connection_init(conn); 3145 3146 #ifdef ENABLE_BLE 3147 #ifdef ENABLE_LE_PERIPHERAL 3148 // re-enable advertisements for le connections if active 3149 if (hci_is_le_connection(conn)){ 3150 hci_update_advertisements_enabled_for_current_roles(); 3151 } 3152 #endif 3153 #endif 3154 break; 3155 3156 case HCI_EVENT_HARDWARE_ERROR: 3157 log_error("Hardware Error: 0x%02x", packet[2]); 3158 if (hci_stack->hardware_error_callback){ 3159 (*hci_stack->hardware_error_callback)(packet[2]); 3160 } else { 3161 // if no special requests, just reboot stack 3162 hci_power_control_off(); 3163 hci_power_control_on(); 3164 } 3165 break; 3166 3167 #ifdef ENABLE_CLASSIC 3168 case HCI_EVENT_ROLE_CHANGE: 3169 if (packet[2]) break; // status != 0 3170 reverse_bd_addr(&packet[3], addr); 3171 addr_type = BD_ADDR_TYPE_ACL; 3172 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3173 if (!conn) break; 3174 conn->role = packet[9]; 3175 break; 3176 #endif 3177 3178 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3179 // release packet buffer only for asynchronous transport and if there are not further fragements 3180 if (hci_transport_synchronous()) { 3181 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3182 return; // instead of break: to avoid re-entering hci_run() 3183 } 3184 hci_stack->acl_fragmentation_tx_active = 0; 3185 if (hci_stack->acl_fragmentation_total_size) break; 3186 hci_release_packet_buffer(); 3187 3188 // L2CAP receives this event via the hci_emit_event below 3189 3190 #ifdef ENABLE_CLASSIC 3191 // For SCO, we do the can_send_now_check here 3192 hci_notify_if_sco_can_send_now(); 3193 #endif 3194 break; 3195 3196 #ifdef ENABLE_CLASSIC 3197 case HCI_EVENT_SCO_CAN_SEND_NOW: 3198 // For SCO, we do the can_send_now_check here 3199 hci_stack->sco_can_send_now = true; 3200 hci_notify_if_sco_can_send_now(); 3201 return; 3202 3203 // explode inquriy results for easier consumption 3204 case HCI_EVENT_INQUIRY_RESULT: 3205 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3206 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3207 gap_inquiry_explode(packet, size); 3208 break; 3209 #endif 3210 3211 #ifdef ENABLE_BLE 3212 case HCI_EVENT_LE_META: 3213 switch (packet[2]){ 3214 #ifdef ENABLE_LE_CENTRAL 3215 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3216 // log_info("advertising report received"); 3217 if (!hci_stack->le_scanning_enabled) break; 3218 le_handle_advertisement_report(packet, size); 3219 break; 3220 #endif 3221 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3222 event_handle_le_connection_complete(packet); 3223 break; 3224 3225 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3226 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3227 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3228 conn = hci_connection_for_handle(handle); 3229 if (!conn) break; 3230 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3231 break; 3232 3233 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3234 // connection 3235 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3236 conn = hci_connection_for_handle(handle); 3237 if (conn) { 3238 // read arguments 3239 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3240 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3241 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3242 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3243 3244 // validate against current connection parameter range 3245 le_connection_parameter_range_t existing_range; 3246 gap_get_connection_parameter_range(&existing_range); 3247 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3248 if (update_parameter){ 3249 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3250 conn->le_conn_interval_min = le_conn_interval_min; 3251 conn->le_conn_interval_max = le_conn_interval_max; 3252 conn->le_conn_latency = le_conn_latency; 3253 conn->le_supervision_timeout = le_supervision_timeout; 3254 } else { 3255 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3256 } 3257 } 3258 break; 3259 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3260 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3261 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3262 conn = hci_connection_for_handle(handle); 3263 if (conn) { 3264 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3265 } 3266 break; 3267 #endif 3268 default: 3269 break; 3270 } 3271 break; 3272 #endif 3273 case HCI_EVENT_VENDOR_SPECIFIC: 3274 // Vendor specific commands often create vendor specific event instead of num completed packets 3275 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3276 switch (hci_stack->manufacturer){ 3277 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3278 hci_stack->num_cmd_packets = 1; 3279 break; 3280 default: 3281 break; 3282 } 3283 break; 3284 default: 3285 break; 3286 } 3287 3288 handle_event_for_current_stack_state(packet, size); 3289 3290 // notify upper stack 3291 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3292 3293 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3294 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3295 handle = little_endian_read_16(packet, 3); 3296 hci_connection_t * aConn = hci_connection_for_handle(handle); 3297 // discard connection if app did not trigger a reconnect in the event handler 3298 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3299 hci_shutdown_connection(aConn); 3300 } 3301 } 3302 3303 // execute main loop 3304 hci_run(); 3305 } 3306 3307 #ifdef ENABLE_CLASSIC 3308 3309 #ifdef ENABLE_SCO_OVER_HCI 3310 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3311 static void sco_schedule_tx(hci_connection_t * conn); 3312 3313 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3314 log_debug("SCO TX Timeout"); 3315 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3316 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3317 if (!conn) return; 3318 3319 // trigger send 3320 conn->sco_tx_ready = 1; 3321 // extra packet if CVSD but SCO buffer is too short 3322 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3323 conn->sco_tx_ready++; 3324 } 3325 hci_notify_if_sco_can_send_now(); 3326 } 3327 3328 3329 #define SCO_TX_AFTER_RX_MS (6) 3330 3331 static void sco_schedule_tx(hci_connection_t * conn){ 3332 3333 uint32_t now = btstack_run_loop_get_time_ms(); 3334 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3335 int time_delta_ms = sco_tx_ms - now; 3336 3337 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3338 3339 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3340 btstack_run_loop_remove_timer(timer); 3341 btstack_run_loop_set_timer(timer, time_delta_ms); 3342 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3343 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3344 btstack_run_loop_add_timer(timer); 3345 } 3346 #endif 3347 3348 static void sco_handler(uint8_t * packet, uint16_t size){ 3349 // lookup connection struct 3350 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3351 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3352 if (!conn) return; 3353 3354 #ifdef ENABLE_SCO_OVER_HCI 3355 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3356 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3357 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3358 packet[2] = 0x3c; 3359 memmove(&packet[3], &packet[23], 63); 3360 size = 63; 3361 } 3362 } 3363 3364 if (hci_have_usb_transport()){ 3365 // Nothing to do 3366 } else { 3367 // 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); 3368 if (hci_stack->synchronous_flow_control_enabled == 0){ 3369 uint32_t now = btstack_run_loop_get_time_ms(); 3370 3371 if (!conn->sco_rx_valid){ 3372 // ignore first 10 packets 3373 conn->sco_rx_count++; 3374 // log_debug("sco rx count %u", conn->sco_rx_count); 3375 if (conn->sco_rx_count == 10) { 3376 // use first timestamp as is and pretent it just started 3377 conn->sco_rx_ms = now; 3378 conn->sco_rx_valid = 1; 3379 conn->sco_rx_count = 0; 3380 sco_schedule_tx(conn); 3381 } 3382 } else { 3383 // track expected arrival timme 3384 conn->sco_rx_count++; 3385 conn->sco_rx_ms += 7; 3386 int delta = (int32_t) (now - conn->sco_rx_ms); 3387 if (delta > 0){ 3388 conn->sco_rx_ms++; 3389 } 3390 // log_debug("sco rx %u", conn->sco_rx_ms); 3391 sco_schedule_tx(conn); 3392 } 3393 } 3394 } 3395 #endif 3396 3397 // deliver to app 3398 if (hci_stack->sco_packet_handler) { 3399 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3400 } 3401 3402 #ifdef HAVE_SCO_TRANSPORT 3403 // We can send one packet for each received packet 3404 conn->sco_tx_ready++; 3405 hci_notify_if_sco_can_send_now(); 3406 #endif 3407 3408 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3409 conn->num_packets_completed++; 3410 hci_stack->host_completed_packets = 1; 3411 hci_run(); 3412 #endif 3413 } 3414 #endif 3415 3416 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3417 hci_dump_packet(packet_type, 1, packet, size); 3418 switch (packet_type) { 3419 case HCI_EVENT_PACKET: 3420 event_handler(packet, size); 3421 break; 3422 case HCI_ACL_DATA_PACKET: 3423 acl_handler(packet, size); 3424 break; 3425 #ifdef ENABLE_CLASSIC 3426 case HCI_SCO_DATA_PACKET: 3427 sco_handler(packet, size); 3428 break; 3429 #endif 3430 default: 3431 break; 3432 } 3433 } 3434 3435 /** 3436 * @brief Add event packet handler. 3437 */ 3438 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3439 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3440 } 3441 3442 3443 /** Register HCI packet handlers */ 3444 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3445 hci_stack->acl_packet_handler = handler; 3446 } 3447 3448 #ifdef ENABLE_CLASSIC 3449 /** 3450 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3451 */ 3452 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3453 hci_stack->sco_packet_handler = handler; 3454 } 3455 #endif 3456 3457 static void hci_state_reset(void){ 3458 // no connections yet 3459 hci_stack->connections = NULL; 3460 3461 // keep discoverable/connectable as this has been requested by the client(s) 3462 // hci_stack->discoverable = 0; 3463 // hci_stack->connectable = 0; 3464 // hci_stack->bondable = 1; 3465 // hci_stack->own_addr_type = 0; 3466 3467 // buffer is free 3468 hci_stack->hci_packet_buffer_reserved = false; 3469 3470 // no pending cmds 3471 hci_stack->decline_reason = 0; 3472 3473 hci_stack->secure_connections_active = false; 3474 3475 #ifdef ENABLE_CLASSIC 3476 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3477 hci_stack->gap_tasks = 3478 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3479 GAP_TASK_SET_CLASS_OF_DEVICE | 3480 GAP_TASK_SET_LOCAL_NAME | 3481 GAP_TASK_SET_EIR_DATA | 3482 GAP_TASK_WRITE_SCAN_ENABLE; 3483 #endif 3484 3485 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3486 hci_stack->classic_read_local_oob_data = true; 3487 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3488 #endif 3489 3490 // LE 3491 #ifdef ENABLE_BLE 3492 memset(hci_stack->le_random_address, 0, 6); 3493 hci_stack->le_random_address_set = 0; 3494 #endif 3495 #ifdef ENABLE_LE_CENTRAL 3496 hci_stack->le_scanning_active = false; 3497 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3498 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3499 hci_stack->le_whitelist_capacity = 0; 3500 #endif 3501 #ifdef ENABLE_LE_PERIPHERAL 3502 hci_stack->le_advertisements_active = false; 3503 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3504 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3505 } 3506 if (hci_stack->le_advertisements_data != NULL){ 3507 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3508 } 3509 #endif 3510 } 3511 3512 #ifdef ENABLE_CLASSIC 3513 /** 3514 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3515 */ 3516 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3517 // store and open remote device db 3518 hci_stack->link_key_db = link_key_db; 3519 if (hci_stack->link_key_db) { 3520 hci_stack->link_key_db->open(); 3521 } 3522 } 3523 #endif 3524 3525 void hci_init(const hci_transport_t *transport, const void *config){ 3526 3527 #ifdef HAVE_MALLOC 3528 if (!hci_stack) { 3529 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3530 } 3531 #else 3532 hci_stack = &hci_stack_static; 3533 #endif 3534 memset(hci_stack, 0, sizeof(hci_stack_t)); 3535 3536 // reference to use transport layer implementation 3537 hci_stack->hci_transport = transport; 3538 3539 // reference to used config 3540 hci_stack->config = config; 3541 3542 // setup pointer for outgoing packet buffer 3543 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3544 3545 // max acl payload size defined in config.h 3546 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3547 3548 // register packet handlers with transport 3549 transport->register_packet_handler(&packet_handler); 3550 3551 hci_stack->state = HCI_STATE_OFF; 3552 3553 // class of device 3554 hci_stack->class_of_device = 0x007a020c; // Smartphone 3555 3556 // bondable by default 3557 hci_stack->bondable = 1; 3558 3559 #ifdef ENABLE_CLASSIC 3560 // classic name 3561 hci_stack->local_name = default_classic_name; 3562 3563 // Master slave policy 3564 hci_stack->master_slave_policy = 1; 3565 3566 // Allow Role Switch 3567 hci_stack->allow_role_switch = 1; 3568 3569 // Default / minimum security level = 2 3570 hci_stack->gap_security_level = LEVEL_2; 3571 3572 // Default Security Mode 4 3573 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3574 3575 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3576 hci_stack->gap_required_encyrption_key_size = 7; 3577 3578 // Link Supervision Timeout 3579 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3580 3581 #endif 3582 3583 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3584 hci_stack->ssp_enable = 1; 3585 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3586 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3587 hci_stack->ssp_auto_accept = 1; 3588 3589 // Secure Connections: enable (requires support from Controller) 3590 hci_stack->secure_connections_enable = true; 3591 3592 // voice setting - signed 16 bit pcm data with CVSD over the air 3593 hci_stack->sco_voice_setting = 0x60; 3594 3595 #ifdef ENABLE_LE_CENTRAL 3596 // connection parameter to use for outgoing connections 3597 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3598 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3599 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3600 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3601 hci_stack->le_connection_latency = 4; // 4 3602 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3603 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3604 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3605 3606 // default LE Scanning 3607 hci_stack->le_scan_type = 0x1; // active 3608 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3609 hci_stack->le_scan_window = 0x30; // 30 ms 3610 #endif 3611 3612 #ifdef ENABLE_LE_PERIPHERAL 3613 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3614 #endif 3615 3616 // connection parameter range used to answer connection parameter update requests in l2cap 3617 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3618 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3619 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3620 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3621 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3622 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3623 3624 hci_state_reset(); 3625 } 3626 3627 void hci_deinit(void){ 3628 #ifdef HAVE_MALLOC 3629 if (hci_stack) { 3630 free(hci_stack); 3631 } 3632 #endif 3633 hci_stack = NULL; 3634 3635 #ifdef ENABLE_CLASSIC 3636 disable_l2cap_timeouts = 0; 3637 #endif 3638 } 3639 3640 /** 3641 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3642 */ 3643 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3644 hci_stack->chipset = chipset_driver; 3645 3646 // reset chipset driver - init is also called on power_up 3647 if (hci_stack->chipset && hci_stack->chipset->init){ 3648 hci_stack->chipset->init(hci_stack->config); 3649 } 3650 } 3651 3652 /** 3653 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3654 */ 3655 void hci_set_control(const btstack_control_t *hardware_control){ 3656 // references to used control implementation 3657 hci_stack->control = hardware_control; 3658 // init with transport config 3659 hardware_control->init(hci_stack->config); 3660 } 3661 3662 void hci_close(void){ 3663 3664 #ifdef ENABLE_CLASSIC 3665 // close remote device db 3666 if (hci_stack->link_key_db) { 3667 hci_stack->link_key_db->close(); 3668 } 3669 #endif 3670 3671 btstack_linked_list_iterator_t lit; 3672 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3673 while (btstack_linked_list_iterator_has_next(&lit)){ 3674 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3675 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3676 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3677 hci_shutdown_connection(connection); 3678 } 3679 3680 hci_power_control(HCI_POWER_OFF); 3681 3682 #ifdef HAVE_MALLOC 3683 free(hci_stack); 3684 #endif 3685 hci_stack = NULL; 3686 } 3687 3688 #ifdef HAVE_SCO_TRANSPORT 3689 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3690 hci_stack->sco_transport = sco_transport; 3691 sco_transport->register_packet_handler(&packet_handler); 3692 } 3693 #endif 3694 3695 #ifdef ENABLE_CLASSIC 3696 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3697 // validate ranage and set 3698 if (encryption_key_size < 7) return; 3699 if (encryption_key_size > 16) return; 3700 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3701 } 3702 3703 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3704 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3705 hci_stack->gap_security_mode = security_mode; 3706 return ERROR_CODE_SUCCESS; 3707 } else { 3708 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3709 } 3710 } 3711 3712 gap_security_mode_t gap_get_security_mode(void){ 3713 return hci_stack->gap_security_mode; 3714 } 3715 3716 void gap_set_security_level(gap_security_level_t security_level){ 3717 hci_stack->gap_security_level = security_level; 3718 } 3719 3720 gap_security_level_t gap_get_security_level(void){ 3721 if (hci_stack->gap_secure_connections_only_mode){ 3722 return LEVEL_4; 3723 } 3724 return hci_stack->gap_security_level; 3725 } 3726 3727 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3728 hci_stack->gap_minimal_service_security_level = security_level; 3729 } 3730 3731 void gap_set_secure_connections_only_mode(bool enable){ 3732 hci_stack->gap_secure_connections_only_mode = enable; 3733 } 3734 3735 bool gap_get_secure_connections_only_mode(void){ 3736 return hci_stack->gap_secure_connections_only_mode; 3737 } 3738 #endif 3739 3740 #ifdef ENABLE_CLASSIC 3741 void gap_set_class_of_device(uint32_t class_of_device){ 3742 hci_stack->class_of_device = class_of_device; 3743 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3744 hci_run(); 3745 } 3746 3747 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3748 hci_stack->default_link_policy_settings = default_link_policy_settings; 3749 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3750 hci_run(); 3751 } 3752 3753 void gap_set_allow_role_switch(bool allow_role_switch){ 3754 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3755 } 3756 3757 uint8_t hci_get_allow_role_switch(void){ 3758 return hci_stack->allow_role_switch; 3759 } 3760 3761 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3762 hci_stack->link_supervision_timeout = link_supervision_timeout; 3763 } 3764 3765 void hci_disable_l2cap_timeout_check(void){ 3766 disable_l2cap_timeouts = 1; 3767 } 3768 #endif 3769 3770 #ifndef HAVE_HOST_CONTROLLER_API 3771 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3772 void hci_set_bd_addr(bd_addr_t addr){ 3773 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3774 hci_stack->custom_bd_addr_set = 1; 3775 } 3776 #endif 3777 3778 // State-Module-Driver overview 3779 // state module low-level 3780 // HCI_STATE_OFF off close 3781 // HCI_STATE_INITIALIZING, on open 3782 // HCI_STATE_WORKING, on open 3783 // HCI_STATE_HALTING, on open 3784 // HCI_STATE_SLEEPING, off/sleep close 3785 // HCI_STATE_FALLING_ASLEEP on open 3786 3787 static int hci_power_control_on(void){ 3788 3789 // power on 3790 int err = 0; 3791 if (hci_stack->control && hci_stack->control->on){ 3792 err = (*hci_stack->control->on)(); 3793 } 3794 if (err){ 3795 log_error( "POWER_ON failed"); 3796 hci_emit_hci_open_failed(); 3797 return err; 3798 } 3799 3800 // int chipset driver 3801 if (hci_stack->chipset && hci_stack->chipset->init){ 3802 hci_stack->chipset->init(hci_stack->config); 3803 } 3804 3805 // init transport 3806 if (hci_stack->hci_transport->init){ 3807 hci_stack->hci_transport->init(hci_stack->config); 3808 } 3809 3810 // open transport 3811 err = hci_stack->hci_transport->open(); 3812 if (err){ 3813 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3814 if (hci_stack->control && hci_stack->control->off){ 3815 (*hci_stack->control->off)(); 3816 } 3817 hci_emit_hci_open_failed(); 3818 return err; 3819 } 3820 return 0; 3821 } 3822 3823 static void hci_power_control_off(void){ 3824 3825 log_info("hci_power_control_off"); 3826 3827 // close low-level device 3828 hci_stack->hci_transport->close(); 3829 3830 log_info("hci_power_control_off - hci_transport closed"); 3831 3832 // power off 3833 if (hci_stack->control && hci_stack->control->off){ 3834 (*hci_stack->control->off)(); 3835 } 3836 3837 log_info("hci_power_control_off - control closed"); 3838 3839 hci_stack->state = HCI_STATE_OFF; 3840 } 3841 3842 static void hci_power_control_sleep(void){ 3843 3844 log_info("hci_power_control_sleep"); 3845 3846 #if 0 3847 // don't close serial port during sleep 3848 3849 // close low-level device 3850 hci_stack->hci_transport->close(hci_stack->config); 3851 #endif 3852 3853 // sleep mode 3854 if (hci_stack->control && hci_stack->control->sleep){ 3855 (*hci_stack->control->sleep)(); 3856 } 3857 3858 hci_stack->state = HCI_STATE_SLEEPING; 3859 } 3860 3861 static int hci_power_control_wake(void){ 3862 3863 log_info("hci_power_control_wake"); 3864 3865 // wake on 3866 if (hci_stack->control && hci_stack->control->wake){ 3867 (*hci_stack->control->wake)(); 3868 } 3869 3870 #if 0 3871 // open low-level device 3872 int err = hci_stack->hci_transport->open(hci_stack->config); 3873 if (err){ 3874 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3875 if (hci_stack->control && hci_stack->control->off){ 3876 (*hci_stack->control->off)(); 3877 } 3878 hci_emit_hci_open_failed(); 3879 return err; 3880 } 3881 #endif 3882 3883 return 0; 3884 } 3885 3886 static void hci_power_transition_to_initializing(void){ 3887 // set up state machine 3888 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3889 hci_stack->hci_packet_buffer_reserved = false; 3890 hci_stack->state = HCI_STATE_INITIALIZING; 3891 hci_stack->substate = HCI_INIT_SEND_RESET; 3892 } 3893 3894 // returns error 3895 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3896 int err; 3897 switch (power_mode){ 3898 case HCI_POWER_ON: 3899 err = hci_power_control_on(); 3900 if (err != 0) { 3901 log_error("hci_power_control_on() error %d", err); 3902 return err; 3903 } 3904 hci_power_transition_to_initializing(); 3905 break; 3906 case HCI_POWER_OFF: 3907 // do nothing 3908 break; 3909 case HCI_POWER_SLEEP: 3910 // do nothing (with SLEEP == OFF) 3911 break; 3912 default: 3913 btstack_assert(false); 3914 break; 3915 } 3916 return ERROR_CODE_SUCCESS; 3917 } 3918 3919 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3920 switch (power_mode){ 3921 case HCI_POWER_ON: 3922 // do nothing 3923 break; 3924 case HCI_POWER_OFF: 3925 // no connections yet, just turn it off 3926 hci_power_control_off(); 3927 break; 3928 case HCI_POWER_SLEEP: 3929 // no connections yet, just turn it off 3930 hci_power_control_sleep(); 3931 break; 3932 default: 3933 btstack_assert(false); 3934 break; 3935 } 3936 return ERROR_CODE_SUCCESS; 3937 } 3938 3939 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3940 switch (power_mode){ 3941 case HCI_POWER_ON: 3942 // do nothing 3943 break; 3944 case HCI_POWER_OFF: 3945 // see hci_run 3946 hci_stack->state = HCI_STATE_HALTING; 3947 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3948 break; 3949 case HCI_POWER_SLEEP: 3950 // see hci_run 3951 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3952 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3953 break; 3954 default: 3955 btstack_assert(false); 3956 break; 3957 } 3958 return ERROR_CODE_SUCCESS; 3959 } 3960 3961 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3962 switch (power_mode){ 3963 case HCI_POWER_ON: 3964 hci_power_transition_to_initializing(); 3965 break; 3966 case HCI_POWER_OFF: 3967 // do nothing 3968 break; 3969 case HCI_POWER_SLEEP: 3970 // see hci_run 3971 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3972 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3973 break; 3974 default: 3975 btstack_assert(false); 3976 break; 3977 } 3978 return ERROR_CODE_SUCCESS; 3979 } 3980 3981 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3982 switch (power_mode){ 3983 case HCI_POWER_ON: 3984 hci_power_transition_to_initializing(); 3985 break; 3986 case HCI_POWER_OFF: 3987 // see hci_run 3988 hci_stack->state = HCI_STATE_HALTING; 3989 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3990 break; 3991 case HCI_POWER_SLEEP: 3992 // do nothing 3993 break; 3994 default: 3995 btstack_assert(false); 3996 break; 3997 } 3998 return ERROR_CODE_SUCCESS; 3999 } 4000 4001 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4002 int err; 4003 switch (power_mode){ 4004 case HCI_POWER_ON: 4005 err = hci_power_control_wake(); 4006 if (err) return err; 4007 hci_power_transition_to_initializing(); 4008 break; 4009 case HCI_POWER_OFF: 4010 hci_stack->state = HCI_STATE_HALTING; 4011 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4012 break; 4013 case HCI_POWER_SLEEP: 4014 // do nothing 4015 break; 4016 default: 4017 btstack_assert(false); 4018 break; 4019 } 4020 return ERROR_CODE_SUCCESS; 4021 } 4022 4023 int hci_power_control(HCI_POWER_MODE power_mode){ 4024 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4025 int err = 0; 4026 switch (hci_stack->state){ 4027 case HCI_STATE_OFF: 4028 err = hci_power_control_state_off(power_mode); 4029 break; 4030 case HCI_STATE_INITIALIZING: 4031 err = hci_power_control_state_initializing(power_mode); 4032 break; 4033 case HCI_STATE_WORKING: 4034 err = hci_power_control_state_working(power_mode); 4035 break; 4036 case HCI_STATE_HALTING: 4037 err = hci_power_control_state_halting(power_mode); 4038 break; 4039 case HCI_STATE_FALLING_ASLEEP: 4040 err = hci_power_control_state_falling_asleep(power_mode); 4041 break; 4042 case HCI_STATE_SLEEPING: 4043 err = hci_power_control_state_sleeping(power_mode); 4044 break; 4045 default: 4046 btstack_assert(false); 4047 break; 4048 } 4049 if (err != 0){ 4050 return err; 4051 } 4052 4053 // create internal event 4054 hci_emit_state(); 4055 4056 // trigger next/first action 4057 hci_run(); 4058 4059 return 0; 4060 } 4061 4062 4063 #ifdef ENABLE_CLASSIC 4064 4065 static void hci_update_scan_enable(void){ 4066 // 2 = page scan, 1 = inq scan 4067 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4068 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4069 hci_run(); 4070 } 4071 4072 void gap_discoverable_control(uint8_t enable){ 4073 if (enable) enable = 1; // normalize argument 4074 4075 if (hci_stack->discoverable == enable){ 4076 hci_emit_discoverable_enabled(hci_stack->discoverable); 4077 return; 4078 } 4079 4080 hci_stack->discoverable = enable; 4081 hci_update_scan_enable(); 4082 } 4083 4084 void gap_connectable_control(uint8_t enable){ 4085 if (enable) enable = 1; // normalize argument 4086 4087 // don't emit event 4088 if (hci_stack->connectable == enable) return; 4089 4090 hci_stack->connectable = enable; 4091 hci_update_scan_enable(); 4092 } 4093 #endif 4094 4095 void gap_local_bd_addr(bd_addr_t address_buffer){ 4096 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4097 } 4098 4099 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4100 static void hci_host_num_completed_packets(void){ 4101 4102 // create packet manually as arrays are not supported and num_commands should not get reduced 4103 hci_reserve_packet_buffer(); 4104 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4105 4106 uint16_t size = 0; 4107 uint16_t num_handles = 0; 4108 packet[size++] = 0x35; 4109 packet[size++] = 0x0c; 4110 size++; // skip param len 4111 size++; // skip num handles 4112 4113 // add { handle, packets } entries 4114 btstack_linked_item_t * it; 4115 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4116 hci_connection_t * connection = (hci_connection_t *) it; 4117 if (connection->num_packets_completed){ 4118 little_endian_store_16(packet, size, connection->con_handle); 4119 size += 2; 4120 little_endian_store_16(packet, size, connection->num_packets_completed); 4121 size += 2; 4122 // 4123 num_handles++; 4124 connection->num_packets_completed = 0; 4125 } 4126 } 4127 4128 packet[2] = size - 3; 4129 packet[3] = num_handles; 4130 4131 hci_stack->host_completed_packets = 0; 4132 4133 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4134 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4135 4136 // release packet buffer for synchronous transport implementations 4137 if (hci_transport_synchronous()){ 4138 hci_release_packet_buffer(); 4139 hci_emit_transport_packet_sent(); 4140 } 4141 } 4142 #endif 4143 4144 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4145 UNUSED(ds); 4146 hci_stack->substate = HCI_HALTING_CLOSE; 4147 // allow packet handlers to defer final shutdown 4148 hci_emit_state(); 4149 hci_run(); 4150 } 4151 4152 static bool hci_run_acl_fragments(void){ 4153 if (hci_stack->acl_fragmentation_total_size > 0u) { 4154 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4155 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4156 if (connection) { 4157 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4158 hci_send_acl_packet_fragments(connection); 4159 return true; 4160 } 4161 } else { 4162 // connection gone -> discard further fragments 4163 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4164 hci_stack->acl_fragmentation_total_size = 0; 4165 hci_stack->acl_fragmentation_pos = 0; 4166 } 4167 } 4168 return false; 4169 } 4170 4171 #ifdef ENABLE_CLASSIC 4172 static bool hci_run_general_gap_classic(void){ 4173 4174 // assert stack is working and classic is active 4175 if (hci_classic_supported() == false) return false; 4176 if (hci_stack->state != HCI_STATE_WORKING) return false; 4177 4178 // decline incoming connections 4179 if (hci_stack->decline_reason){ 4180 uint8_t reason = hci_stack->decline_reason; 4181 hci_stack->decline_reason = 0; 4182 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4183 return true; 4184 } 4185 4186 if (hci_stack->gap_tasks != 0){ 4187 hci_run_gap_tasks_classic(); 4188 return true; 4189 } 4190 4191 // start/stop inquiry 4192 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4193 uint8_t duration = hci_stack->inquiry_state; 4194 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4195 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4196 return true; 4197 } 4198 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4199 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4200 hci_send_cmd(&hci_inquiry_cancel); 4201 return true; 4202 } 4203 // remote name request 4204 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4205 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4206 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4207 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4208 return true; 4209 } 4210 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4211 // Local OOB data 4212 if (hci_stack->classic_read_local_oob_data){ 4213 hci_stack->classic_read_local_oob_data = false; 4214 if (hci_stack->local_supported_commands[1] & 0x10u){ 4215 hci_send_cmd(&hci_read_local_extended_oob_data); 4216 } else { 4217 hci_send_cmd(&hci_read_local_oob_data); 4218 } 4219 } 4220 #endif 4221 // pairing 4222 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4223 uint8_t state = hci_stack->gap_pairing_state; 4224 uint8_t pin_code[16]; 4225 switch (state){ 4226 case GAP_PAIRING_STATE_SEND_PIN: 4227 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4228 memset(pin_code, 0, 16); 4229 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4230 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4231 break; 4232 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4233 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4234 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4235 break; 4236 case GAP_PAIRING_STATE_SEND_PASSKEY: 4237 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4238 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4239 break; 4240 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4241 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4242 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4243 break; 4244 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4245 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4246 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4247 break; 4248 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4249 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4250 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4251 break; 4252 default: 4253 break; 4254 } 4255 return true; 4256 } 4257 return false; 4258 } 4259 #endif 4260 4261 #ifdef ENABLE_BLE 4262 static bool hci_run_general_gap_le(void){ 4263 4264 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4265 4266 if (hci_stack->state != HCI_STATE_WORKING) return false; 4267 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4268 4269 4270 // Phase 1: collect what to stop 4271 4272 bool scanning_stop = false; 4273 bool connecting_stop = false; 4274 bool advertising_stop = false; 4275 4276 #ifndef ENABLE_LE_CENTRAL 4277 UNUSED(scanning_stop); 4278 UNUSED(connecting_stop); 4279 #endif 4280 #ifndef ENABLE_LE_PERIPHERAL 4281 UNUSED(advertising_stop); 4282 #endif 4283 4284 // check if whitelist needs modification 4285 bool whitelist_modification_pending = false; 4286 btstack_linked_list_iterator_t lit; 4287 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4288 while (btstack_linked_list_iterator_has_next(&lit)){ 4289 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4290 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4291 whitelist_modification_pending = true; 4292 break; 4293 } 4294 } 4295 // check if resolving list needs modification 4296 bool resolving_list_modification_pending = false; 4297 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4298 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4299 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4300 resolving_list_modification_pending = true; 4301 } 4302 #endif 4303 4304 #ifdef ENABLE_LE_CENTRAL 4305 // scanning control 4306 if (hci_stack->le_scanning_active) { 4307 // stop if: 4308 // - parameter change required 4309 // - it's disabled 4310 // - whitelist change required but used for scanning 4311 // - resolving list modified 4312 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4313 if ((hci_stack->le_scanning_param_update) || 4314 !hci_stack->le_scanning_enabled || 4315 scanning_uses_whitelist || 4316 resolving_list_modification_pending){ 4317 4318 scanning_stop = true; 4319 } 4320 } 4321 #endif 4322 4323 #ifdef ENABLE_LE_CENTRAL 4324 // connecting control 4325 bool connecting_with_whitelist; 4326 switch (hci_stack->le_connecting_state){ 4327 case LE_CONNECTING_DIRECT: 4328 case LE_CONNECTING_WHITELIST: 4329 // stop connecting if: 4330 // - connecting uses white and whitelist modification pending 4331 // - if it got disabled 4332 // - resolving list modified 4333 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4334 if ((connecting_with_whitelist && whitelist_modification_pending) || 4335 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4336 resolving_list_modification_pending) { 4337 4338 connecting_stop = true; 4339 } 4340 break; 4341 default: 4342 break; 4343 } 4344 #endif 4345 4346 #ifdef ENABLE_LE_PERIPHERAL 4347 // le advertisement control 4348 if (hci_stack->le_advertisements_active){ 4349 // stop if: 4350 // - parameter change required 4351 // - it's disabled 4352 // - whitelist change required but used for advertisement filter policy 4353 // - resolving list modified 4354 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4355 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4356 if (advertising_change || 4357 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4358 (advertising_uses_whitelist & whitelist_modification_pending) || 4359 resolving_list_modification_pending) { 4360 4361 advertising_stop = true; 4362 } 4363 } 4364 #endif 4365 4366 4367 // Phase 2: stop everything that should be off during modifications 4368 4369 #ifdef ENABLE_LE_CENTRAL 4370 if (scanning_stop){ 4371 hci_stack->le_scanning_active = false; 4372 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4373 return true; 4374 } 4375 #endif 4376 4377 #ifdef ENABLE_LE_CENTRAL 4378 if (connecting_stop){ 4379 hci_send_cmd(&hci_le_create_connection_cancel); 4380 return true; 4381 } 4382 #endif 4383 4384 #ifdef ENABLE_LE_PERIPHERAL 4385 if (advertising_stop){ 4386 hci_stack->le_advertisements_active = false; 4387 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4388 return true; 4389 } 4390 #endif 4391 4392 // Phase 3: modify 4393 4394 #ifdef ENABLE_LE_CENTRAL 4395 if (hci_stack->le_scanning_param_update){ 4396 hci_stack->le_scanning_param_update = false; 4397 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4398 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4399 return true; 4400 } 4401 #endif 4402 4403 #ifdef ENABLE_LE_PERIPHERAL 4404 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4405 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4406 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4407 hci_send_cmd(&hci_le_set_advertising_parameters, 4408 hci_stack->le_advertisements_interval_min, 4409 hci_stack->le_advertisements_interval_max, 4410 hci_stack->le_advertisements_type, 4411 hci_stack->le_advertisements_own_addr_type, 4412 hci_stack->le_advertisements_direct_address_type, 4413 hci_stack->le_advertisements_direct_address, 4414 hci_stack->le_advertisements_channel_map, 4415 hci_stack->le_advertisements_filter_policy); 4416 return true; 4417 } 4418 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4419 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4420 uint8_t adv_data_clean[31]; 4421 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4422 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4423 hci_stack->le_advertisements_data_len); 4424 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4425 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4426 return true; 4427 } 4428 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4429 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4430 uint8_t scan_data_clean[31]; 4431 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4432 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4433 hci_stack->le_scan_response_data_len); 4434 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4435 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4436 return true; 4437 } 4438 #endif 4439 4440 4441 #ifdef ENABLE_LE_CENTRAL 4442 // if connect with whitelist was active and is not cancelled yet, wait until next time 4443 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4444 #endif 4445 4446 // LE Whitelist Management 4447 if (whitelist_modification_pending){ 4448 // add/remove entries 4449 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4450 while (btstack_linked_list_iterator_has_next(&lit)){ 4451 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4452 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4453 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4454 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4455 return true; 4456 } 4457 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4458 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4459 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4460 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4461 return true; 4462 } 4463 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4464 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4465 btstack_memory_whitelist_entry_free(entry); 4466 } 4467 } 4468 } 4469 4470 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4471 // LE Resolving List Management 4472 if (resolving_list_supported) { 4473 uint16_t i; 4474 switch (hci_stack->le_resolving_list_state) { 4475 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4476 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4477 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4478 return true; 4479 case LE_RESOLVING_LIST_READ_SIZE: 4480 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4481 hci_send_cmd(&hci_le_read_resolving_list_size); 4482 return true; 4483 case LE_RESOLVING_LIST_SEND_CLEAR: 4484 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4485 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4486 sizeof(hci_stack->le_resolving_list_add_entries)); 4487 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4488 sizeof(hci_stack->le_resolving_list_remove_entries)); 4489 hci_send_cmd(&hci_le_clear_resolving_list); 4490 return true; 4491 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4492 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4493 uint8_t offset = i >> 3; 4494 uint8_t mask = 1 << (i & 7); 4495 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4496 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4497 bd_addr_t peer_identity_addreses; 4498 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4499 sm_key_t peer_irk; 4500 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4501 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4502 4503 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4504 // trigger whitelist entry 'update' (work around for controller bug) 4505 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4506 while (btstack_linked_list_iterator_has_next(&lit)) { 4507 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4508 if (entry->address_type != peer_identity_addr_type) continue; 4509 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4510 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4511 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4512 } 4513 #endif 4514 4515 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4516 peer_identity_addreses); 4517 return true; 4518 } 4519 4520 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4521 4522 /* fall through */ 4523 4524 case LE_RESOLVING_LIST_ADD_ENTRIES: 4525 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4526 uint8_t offset = i >> 3; 4527 uint8_t mask = 1 << (i & 7); 4528 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4529 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4530 bd_addr_t peer_identity_addreses; 4531 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4532 sm_key_t peer_irk; 4533 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4534 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4535 const uint8_t *local_irk = gap_get_persistent_irk(); 4536 // command uses format specifier 'P' that stores 16-byte value without flip 4537 uint8_t local_irk_flipped[16]; 4538 uint8_t peer_irk_flipped[16]; 4539 reverse_128(local_irk, local_irk_flipped); 4540 reverse_128(peer_irk, peer_irk_flipped); 4541 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4542 peer_irk_flipped, local_irk_flipped); 4543 return true; 4544 } 4545 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4546 break; 4547 4548 default: 4549 break; 4550 } 4551 } 4552 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4553 #endif 4554 4555 // Phase 4: restore state 4556 4557 #ifdef ENABLE_LE_CENTRAL 4558 // re-start scanning 4559 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4560 hci_stack->le_scanning_active = true; 4561 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4562 return true; 4563 } 4564 #endif 4565 4566 #ifdef ENABLE_LE_CENTRAL 4567 // re-start connecting 4568 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4569 bd_addr_t null_addr; 4570 memset(null_addr, 0, 6); 4571 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4572 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4573 hci_send_cmd(&hci_le_create_connection, 4574 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4575 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4576 1, // use whitelist 4577 0, // peer address type 4578 null_addr, // peer bd addr 4579 hci_stack->le_connection_own_addr_type, // our addr type: 4580 hci_stack->le_connection_interval_min, // conn interval min 4581 hci_stack->le_connection_interval_max, // conn interval max 4582 hci_stack->le_connection_latency, // conn latency 4583 hci_stack->le_supervision_timeout, // conn latency 4584 hci_stack->le_minimum_ce_length, // min ce length 4585 hci_stack->le_maximum_ce_length // max ce length 4586 ); 4587 return true; 4588 } 4589 #endif 4590 4591 #ifdef ENABLE_LE_PERIPHERAL 4592 // re-start advertising 4593 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4594 // check if advertisements should be enabled given 4595 hci_stack->le_advertisements_active = true; 4596 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4597 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4598 return true; 4599 } 4600 #endif 4601 4602 return false; 4603 } 4604 #endif 4605 4606 static bool hci_run_general_pending_commands(void){ 4607 btstack_linked_item_t * it; 4608 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4609 hci_connection_t * connection = (hci_connection_t *) it; 4610 4611 switch(connection->state){ 4612 case SEND_CREATE_CONNECTION: 4613 switch(connection->address_type){ 4614 #ifdef ENABLE_CLASSIC 4615 case BD_ADDR_TYPE_ACL: 4616 log_info("sending hci_create_connection"); 4617 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4618 break; 4619 #endif 4620 default: 4621 #ifdef ENABLE_BLE 4622 #ifdef ENABLE_LE_CENTRAL 4623 log_info("sending hci_le_create_connection"); 4624 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4625 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4626 hci_send_cmd(&hci_le_create_connection, 4627 hci_stack->le_connection_scan_interval, // conn scan interval 4628 hci_stack->le_connection_scan_window, // conn scan windows 4629 0, // don't use whitelist 4630 connection->address_type, // peer address type 4631 connection->address, // peer bd addr 4632 hci_stack->le_connection_own_addr_type, // our addr type: 4633 hci_stack->le_connection_interval_min, // conn interval min 4634 hci_stack->le_connection_interval_max, // conn interval max 4635 hci_stack->le_connection_latency, // conn latency 4636 hci_stack->le_supervision_timeout, // conn latency 4637 hci_stack->le_minimum_ce_length, // min ce length 4638 hci_stack->le_maximum_ce_length // max ce length 4639 ); 4640 connection->state = SENT_CREATE_CONNECTION; 4641 #endif 4642 #endif 4643 break; 4644 } 4645 return true; 4646 4647 #ifdef ENABLE_CLASSIC 4648 case RECEIVED_CONNECTION_REQUEST: 4649 connection->role = HCI_ROLE_SLAVE; 4650 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4651 log_info("sending hci_accept_connection_request"); 4652 connection->state = ACCEPTED_CONNECTION_REQUEST; 4653 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4654 } 4655 return true; 4656 #endif 4657 4658 #ifdef ENABLE_BLE 4659 #ifdef ENABLE_LE_CENTRAL 4660 case SEND_CANCEL_CONNECTION: 4661 connection->state = SENT_CANCEL_CONNECTION; 4662 hci_send_cmd(&hci_le_create_connection_cancel); 4663 return true; 4664 #endif 4665 #endif 4666 case SEND_DISCONNECT: 4667 connection->state = SENT_DISCONNECT; 4668 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4669 return true; 4670 4671 default: 4672 break; 4673 } 4674 4675 // no further commands if connection is about to get shut down 4676 if (connection->state == SENT_DISCONNECT) continue; 4677 4678 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4679 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4680 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4681 return true; 4682 } 4683 4684 #ifdef ENABLE_CLASSIC 4685 4686 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4687 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4688 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4689 return true; 4690 } 4691 4692 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4693 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4694 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4695 return true; 4696 } 4697 4698 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4699 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4700 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4701 return true; 4702 } 4703 4704 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4705 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4706 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4707 return true; 4708 } 4709 4710 // Handling link key request requires remote supported features 4711 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4712 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4713 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4714 4715 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4716 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4717 if (have_link_key && security_level_sufficient){ 4718 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4719 } else { 4720 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4721 } 4722 return true; 4723 } 4724 4725 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4726 log_info("denying to pin request"); 4727 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4728 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4729 return true; 4730 } 4731 4732 // security assessment requires remote features 4733 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4734 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4735 hci_ssp_assess_security_on_io_cap_request(connection); 4736 // 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 4737 } 4738 4739 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4740 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4741 // set authentication requirements: 4742 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4743 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4744 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4745 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4746 authreq |= 1; 4747 } 4748 bool bonding = hci_stack->bondable; 4749 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4750 // if we have received IO Cap Response, we're in responder role 4751 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4752 if (bonding && !remote_bonding){ 4753 log_info("Remote not bonding, dropping local flag"); 4754 bonding = false; 4755 } 4756 } 4757 if (bonding){ 4758 if (connection->bonding_flags & BONDING_DEDICATED){ 4759 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4760 } else { 4761 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4762 } 4763 } 4764 uint8_t have_oob_data = 0; 4765 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4766 if (connection->classic_oob_c_192 != NULL){ 4767 have_oob_data |= 1; 4768 } 4769 if (connection->classic_oob_c_256 != NULL){ 4770 have_oob_data |= 2; 4771 } 4772 #endif 4773 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4774 return true; 4775 } 4776 4777 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4778 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4779 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4780 return true; 4781 } 4782 4783 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4784 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4785 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4786 const uint8_t zero[16] = { 0 }; 4787 const uint8_t * r_192 = zero; 4788 const uint8_t * c_192 = zero; 4789 const uint8_t * r_256 = zero; 4790 const uint8_t * c_256 = zero; 4791 // verify P-256 OOB 4792 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4793 c_256 = connection->classic_oob_c_256; 4794 if (connection->classic_oob_r_256 != NULL) { 4795 r_256 = connection->classic_oob_r_256; 4796 } 4797 } 4798 // verify P-192 OOB 4799 if ((connection->classic_oob_c_192 != NULL)) { 4800 c_192 = connection->classic_oob_c_192; 4801 if (connection->classic_oob_r_192 != NULL) { 4802 r_192 = connection->classic_oob_r_192; 4803 } 4804 } 4805 4806 // assess security 4807 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4808 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4809 if (need_level_4 && !can_reach_level_4){ 4810 log_info("Level 4 required, but not possible -> abort"); 4811 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4812 // send oob negative reply 4813 c_256 = NULL; 4814 c_192 = NULL; 4815 } 4816 4817 // Reply 4818 if (c_256 != zero) { 4819 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4820 } else if (c_192 != zero){ 4821 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4822 } else { 4823 hci_stack->classic_oob_con_handle = connection->con_handle; 4824 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4825 } 4826 return true; 4827 } 4828 #endif 4829 4830 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4831 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4832 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4833 return true; 4834 } 4835 4836 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4837 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4838 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4839 return true; 4840 } 4841 4842 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4843 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4844 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4845 return true; 4846 } 4847 4848 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4849 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4850 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4851 connection->state = SENT_DISCONNECT; 4852 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4853 return true; 4854 } 4855 4856 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4857 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4858 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4859 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4860 return true; 4861 } 4862 4863 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4864 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4865 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4866 return true; 4867 } 4868 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4869 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4870 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4871 return true; 4872 } 4873 #endif 4874 4875 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4876 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4877 #ifdef ENABLE_CLASSIC 4878 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4879 #endif 4880 if (connection->state != SENT_DISCONNECT){ 4881 connection->state = SENT_DISCONNECT; 4882 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4883 return true; 4884 } 4885 } 4886 4887 #ifdef ENABLE_CLASSIC 4888 uint16_t sniff_min_interval; 4889 switch (connection->sniff_min_interval){ 4890 case 0: 4891 break; 4892 case 0xffff: 4893 connection->sniff_min_interval = 0; 4894 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4895 return true; 4896 default: 4897 sniff_min_interval = connection->sniff_min_interval; 4898 connection->sniff_min_interval = 0; 4899 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4900 return true; 4901 } 4902 4903 if (connection->sniff_subrating_max_latency != 0xffff){ 4904 uint16_t max_latency = connection->sniff_subrating_max_latency; 4905 connection->sniff_subrating_max_latency = 0; 4906 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4907 return true; 4908 } 4909 4910 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4911 uint8_t service_type = (uint8_t) connection->qos_service_type; 4912 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4913 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); 4914 return true; 4915 } 4916 4917 if (connection->request_role != HCI_ROLE_INVALID){ 4918 hci_role_t role = connection->request_role; 4919 connection->request_role = HCI_ROLE_INVALID; 4920 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4921 return true; 4922 } 4923 #endif 4924 4925 #ifdef ENABLE_BLE 4926 switch (connection->le_con_parameter_update_state){ 4927 // response to L2CAP CON PARAMETER UPDATE REQUEST 4928 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4929 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4930 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4931 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4932 0x0000, 0xffff); 4933 return true; 4934 case CON_PARAMETER_UPDATE_REPLY: 4935 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4936 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4937 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4938 0x0000, 0xffff); 4939 return true; 4940 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4941 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4942 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4943 return true; 4944 default: 4945 break; 4946 } 4947 if (connection->le_phy_update_all_phys != 0xffu){ 4948 uint8_t all_phys = connection->le_phy_update_all_phys; 4949 connection->le_phy_update_all_phys = 0xff; 4950 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); 4951 return true; 4952 } 4953 #endif 4954 } 4955 return false; 4956 } 4957 4958 static void hci_run(void){ 4959 4960 bool done; 4961 4962 // send continuation fragments first, as they block the prepared packet buffer 4963 done = hci_run_acl_fragments(); 4964 if (done) return; 4965 4966 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4967 // send host num completed packets next as they don't require num_cmd_packets > 0 4968 if (!hci_can_send_comand_packet_transport()) return; 4969 if (hci_stack->host_completed_packets){ 4970 hci_host_num_completed_packets(); 4971 return; 4972 } 4973 #endif 4974 4975 if (!hci_can_send_command_packet_now()) return; 4976 4977 // global/non-connection oriented commands 4978 4979 4980 #ifdef ENABLE_CLASSIC 4981 // general gap classic 4982 done = hci_run_general_gap_classic(); 4983 if (done) return; 4984 #endif 4985 4986 #ifdef ENABLE_BLE 4987 // general gap le 4988 done = hci_run_general_gap_le(); 4989 if (done) return; 4990 #endif 4991 4992 // send pending HCI commands 4993 done = hci_run_general_pending_commands(); 4994 if (done) return; 4995 4996 // stack state sub statemachines 4997 hci_connection_t * connection; 4998 switch (hci_stack->state){ 4999 case HCI_STATE_INITIALIZING: 5000 hci_initializing_run(); 5001 break; 5002 5003 case HCI_STATE_HALTING: 5004 5005 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5006 switch (hci_stack->substate){ 5007 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5008 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5009 5010 #ifdef ENABLE_BLE 5011 #ifdef ENABLE_LE_CENTRAL 5012 // free whitelist entries 5013 { 5014 btstack_linked_list_iterator_t lit; 5015 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5016 while (btstack_linked_list_iterator_has_next(&lit)){ 5017 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5018 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5019 btstack_memory_whitelist_entry_free(entry); 5020 } 5021 } 5022 #endif 5023 #endif 5024 // close all open connections 5025 connection = (hci_connection_t *) hci_stack->connections; 5026 if (connection){ 5027 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5028 if (!hci_can_send_command_packet_now()) return; 5029 5030 // check state 5031 if (connection->state == SENT_DISCONNECT) return; 5032 connection->state = SENT_DISCONNECT; 5033 5034 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5035 5036 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5037 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5038 5039 // ... which would be ignored anyway as we shutdown (free) the connection now 5040 hci_shutdown_connection(connection); 5041 5042 // finally, send the disconnect command 5043 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5044 return; 5045 } 5046 5047 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5048 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5049 log_info("HCI_STATE_HALTING: wait 50 ms"); 5050 hci_stack->substate = HCI_HALTING_W4_TIMER; 5051 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5052 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5053 btstack_run_loop_add_timer(&hci_stack->timeout); 5054 break; 5055 } 5056 5057 /* fall through */ 5058 5059 case HCI_HALTING_CLOSE: 5060 log_info("HCI_STATE_HALTING, calling off"); 5061 5062 // switch mode 5063 hci_power_control_off(); 5064 5065 log_info("HCI_STATE_HALTING, emitting state"); 5066 hci_emit_state(); 5067 log_info("HCI_STATE_HALTING, done"); 5068 break; 5069 5070 case HCI_HALTING_W4_TIMER: 5071 // keep waiting 5072 5073 break; 5074 default: 5075 break; 5076 } 5077 5078 break; 5079 5080 case HCI_STATE_FALLING_ASLEEP: 5081 switch(hci_stack->substate) { 5082 case HCI_FALLING_ASLEEP_DISCONNECT: 5083 log_info("HCI_STATE_FALLING_ASLEEP"); 5084 // close all open connections 5085 connection = (hci_connection_t *) hci_stack->connections; 5086 if (connection){ 5087 5088 // send disconnect 5089 if (!hci_can_send_command_packet_now()) return; 5090 5091 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5092 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5093 5094 // send disconnected event right away - causes higher layer connections to get closed, too. 5095 hci_shutdown_connection(connection); 5096 return; 5097 } 5098 5099 if (hci_classic_supported()){ 5100 // disable page and inquiry scan 5101 if (!hci_can_send_command_packet_now()) return; 5102 5103 log_info("HCI_STATE_HALTING, disabling inq scans"); 5104 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5105 5106 // continue in next sub state 5107 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5108 break; 5109 } 5110 5111 /* fall through */ 5112 5113 case HCI_FALLING_ASLEEP_COMPLETE: 5114 log_info("HCI_STATE_HALTING, calling sleep"); 5115 // switch mode 5116 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5117 hci_emit_state(); 5118 break; 5119 5120 default: 5121 break; 5122 } 5123 break; 5124 5125 default: 5126 break; 5127 } 5128 } 5129 5130 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5131 // house-keeping 5132 5133 #ifdef ENABLE_CLASSIC 5134 bd_addr_t addr; 5135 hci_connection_t * conn; 5136 #endif 5137 #ifdef ENABLE_LE_CENTRAL 5138 uint8_t initiator_filter_policy; 5139 #endif 5140 5141 uint16_t opcode = little_endian_read_16(packet, 0); 5142 switch (opcode) { 5143 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5144 hci_stack->loopback_mode = packet[3]; 5145 break; 5146 5147 #ifdef ENABLE_CLASSIC 5148 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5149 reverse_bd_addr(&packet[3], addr); 5150 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5151 5152 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5153 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5154 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5155 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5156 } 5157 5158 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5159 if (!conn) { 5160 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5161 if (!conn) { 5162 // notify client that alloc failed 5163 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5164 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5165 } 5166 conn->state = SEND_CREATE_CONNECTION; 5167 conn->role = HCI_ROLE_MASTER; 5168 } 5169 5170 conn->con_handle = HCI_CON_HANDLE_INVALID; 5171 conn->role = HCI_ROLE_INVALID; 5172 5173 log_info("conn state %u", conn->state); 5174 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5175 switch (conn->state) { 5176 // if connection active exists 5177 case OPEN: 5178 // and OPEN, emit connection complete command 5179 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5180 // packet not sent to controller 5181 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5182 case RECEIVED_DISCONNECTION_COMPLETE: 5183 // create connection triggered in disconnect complete event, let's do it now 5184 break; 5185 case SEND_CREATE_CONNECTION: 5186 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5187 break; 5188 default: 5189 // otherwise, just ignore as it is already in the open process 5190 // packet not sent to controller 5191 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5192 } 5193 conn->state = SENT_CREATE_CONNECTION; 5194 5195 // track outgoing connection 5196 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5197 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5198 break; 5199 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5200 if (hci_stack->link_key_db) { 5201 reverse_bd_addr(&packet[3], addr); 5202 hci_stack->link_key_db->delete_link_key(addr); 5203 } 5204 break; 5205 5206 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5207 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5208 // setup_synchronous_connection? Voice setting at offset 22 5209 // TODO: compare to current setting if sco connection already active 5210 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5211 break; 5212 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5213 // accept_synchronus_connection? Voice setting at offset 18 5214 // TODO: compare to current setting if sco connection already active 5215 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5216 break; 5217 #endif 5218 #endif 5219 5220 #ifdef ENABLE_BLE 5221 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5222 hci_stack->le_random_address_set = 1; 5223 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5224 break; 5225 #ifdef ENABLE_LE_PERIPHERAL 5226 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5227 hci_stack->le_advertisements_active = packet[3] != 0; 5228 break; 5229 #endif 5230 #ifdef ENABLE_LE_CENTRAL 5231 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5232 // white list used? 5233 initiator_filter_policy = packet[7]; 5234 switch (initiator_filter_policy) { 5235 case 0: 5236 // whitelist not used 5237 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5238 break; 5239 case 1: 5240 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5241 break; 5242 default: 5243 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5244 break; 5245 } 5246 // track outgoing connection 5247 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5248 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5249 break; 5250 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5251 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5252 break; 5253 #endif 5254 #endif 5255 default: 5256 break; 5257 } 5258 5259 hci_stack->num_cmd_packets--; 5260 5261 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5262 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5263 if (err != 0){ 5264 return ERROR_CODE_HARDWARE_FAILURE; 5265 } 5266 return ERROR_CODE_SUCCESS; 5267 } 5268 5269 // disconnect because of security block 5270 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5271 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5272 if (!connection) return; 5273 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5274 } 5275 5276 5277 // Configure Secure Simple Pairing 5278 5279 #ifdef ENABLE_CLASSIC 5280 5281 // enable will enable SSP during init 5282 void gap_ssp_set_enable(int enable){ 5283 hci_stack->ssp_enable = enable; 5284 } 5285 5286 static int hci_local_ssp_activated(void){ 5287 return gap_ssp_supported() && hci_stack->ssp_enable; 5288 } 5289 5290 // if set, BTstack will respond to io capability request using authentication requirement 5291 void gap_ssp_set_io_capability(int io_capability){ 5292 hci_stack->ssp_io_capability = io_capability; 5293 } 5294 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5295 hci_stack->ssp_authentication_requirement = authentication_requirement; 5296 } 5297 5298 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5299 void gap_ssp_set_auto_accept(int auto_accept){ 5300 hci_stack->ssp_auto_accept = auto_accept; 5301 } 5302 5303 void gap_secure_connections_enable(bool enable){ 5304 hci_stack->secure_connections_enable = enable; 5305 } 5306 5307 #endif 5308 5309 // va_list part of hci_send_cmd 5310 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5311 if (!hci_can_send_command_packet_now()){ 5312 log_error("hci_send_cmd called but cannot send packet now"); 5313 return ERROR_CODE_COMMAND_DISALLOWED; 5314 } 5315 5316 // for HCI INITIALIZATION 5317 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5318 hci_stack->last_cmd_opcode = cmd->opcode; 5319 5320 hci_reserve_packet_buffer(); 5321 uint8_t * packet = hci_stack->hci_packet_buffer; 5322 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5323 uint8_t status = hci_send_cmd_packet(packet, size); 5324 5325 // release packet buffer on error or for synchronous transport implementations 5326 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5327 hci_release_packet_buffer(); 5328 hci_emit_transport_packet_sent(); 5329 } 5330 5331 return status; 5332 } 5333 5334 /** 5335 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5336 */ 5337 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5338 va_list argptr; 5339 va_start(argptr, cmd); 5340 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5341 va_end(argptr); 5342 return status; 5343 } 5344 5345 // Create various non-HCI events. 5346 // TODO: generalize, use table similar to hci_create_command 5347 5348 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5349 // dump packet 5350 if (dump) { 5351 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5352 } 5353 5354 // dispatch to all event handlers 5355 btstack_linked_list_iterator_t it; 5356 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5357 while (btstack_linked_list_iterator_has_next(&it)){ 5358 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5359 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5360 } 5361 } 5362 5363 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5364 if (!hci_stack->acl_packet_handler) return; 5365 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5366 } 5367 5368 #ifdef ENABLE_CLASSIC 5369 static void hci_notify_if_sco_can_send_now(void){ 5370 // notify SCO sender if waiting 5371 if (!hci_stack->sco_waiting_for_can_send_now) return; 5372 if (hci_can_send_sco_packet_now()){ 5373 hci_stack->sco_waiting_for_can_send_now = 0; 5374 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5375 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5376 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5377 } 5378 } 5379 5380 // parsing end emitting has been merged to reduce code size 5381 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5382 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5383 5384 uint8_t * eir_data; 5385 ad_context_t context; 5386 const uint8_t * name; 5387 uint8_t name_len; 5388 5389 if (size < 3) return; 5390 5391 int event_type = hci_event_packet_get_type(packet); 5392 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5393 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5394 5395 switch (event_type){ 5396 case HCI_EVENT_INQUIRY_RESULT: 5397 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5398 if (size != (3 + (num_responses * 14))) return; 5399 break; 5400 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5401 if (size != 257) return; 5402 if (num_responses != 1) return; 5403 break; 5404 default: 5405 return; 5406 } 5407 5408 // event[1] is set at the end 5409 int i; 5410 for (i=0; i<num_responses;i++){ 5411 memset(event, 0, sizeof(event)); 5412 event[0] = GAP_EVENT_INQUIRY_RESULT; 5413 uint8_t event_size = 27; // if name is not set by EIR 5414 5415 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5416 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5417 (void)memcpy(&event[9], 5418 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5419 3); // class of device 5420 (void)memcpy(&event[12], 5421 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5422 2); // clock offset 5423 5424 switch (event_type){ 5425 case HCI_EVENT_INQUIRY_RESULT: 5426 // 14,15,16,17 = 0, size 18 5427 break; 5428 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5429 event[14] = 1; 5430 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5431 // 16,17 = 0, size 18 5432 break; 5433 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5434 event[14] = 1; 5435 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5436 // EIR packets only contain a single inquiry response 5437 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5438 name = NULL; 5439 // Iterate over EIR data 5440 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5441 uint8_t data_type = ad_iterator_get_data_type(&context); 5442 uint8_t data_size = ad_iterator_get_data_len(&context); 5443 const uint8_t * data = ad_iterator_get_data(&context); 5444 // Prefer Complete Local Name over Shortened Local Name 5445 switch (data_type){ 5446 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5447 if (name) continue; 5448 /* fall through */ 5449 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5450 name = data; 5451 name_len = data_size; 5452 break; 5453 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5454 if (data_size != 8) break; 5455 event[16] = 1; 5456 memcpy(&event[17], data, 8); 5457 break; 5458 default: 5459 break; 5460 } 5461 } 5462 if (name){ 5463 event[25] = 1; 5464 // truncate name if needed 5465 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5466 event[26] = len; 5467 (void)memcpy(&event[27], name, len); 5468 event_size += len; 5469 } 5470 break; 5471 default: 5472 return; 5473 } 5474 event[1] = event_size - 2; 5475 hci_emit_event(event, event_size, 1); 5476 } 5477 } 5478 #endif 5479 5480 void hci_emit_state(void){ 5481 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5482 uint8_t event[3]; 5483 event[0] = BTSTACK_EVENT_STATE; 5484 event[1] = sizeof(event) - 2u; 5485 event[2] = hci_stack->state; 5486 hci_emit_event(event, sizeof(event), 1); 5487 } 5488 5489 #ifdef ENABLE_CLASSIC 5490 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5491 uint8_t event[13]; 5492 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5493 event[1] = sizeof(event) - 2; 5494 event[2] = status; 5495 little_endian_store_16(event, 3, con_handle); 5496 reverse_bd_addr(address, &event[5]); 5497 event[11] = 1; // ACL connection 5498 event[12] = 0; // encryption disabled 5499 hci_emit_event(event, sizeof(event), 1); 5500 } 5501 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5502 if (disable_l2cap_timeouts) return; 5503 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5504 uint8_t event[4]; 5505 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5506 event[1] = sizeof(event) - 2; 5507 little_endian_store_16(event, 2, conn->con_handle); 5508 hci_emit_event(event, sizeof(event), 1); 5509 } 5510 #endif 5511 5512 #ifdef ENABLE_BLE 5513 #ifdef ENABLE_LE_CENTRAL 5514 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){ 5515 uint8_t event[21]; 5516 event[0] = HCI_EVENT_LE_META; 5517 event[1] = sizeof(event) - 2u; 5518 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5519 event[3] = status; 5520 little_endian_store_16(event, 4, con_handle); 5521 event[6] = 0; // TODO: role 5522 event[7] = address_type; 5523 reverse_bd_addr(address, &event[8]); 5524 little_endian_store_16(event, 14, 0); // interval 5525 little_endian_store_16(event, 16, 0); // latency 5526 little_endian_store_16(event, 18, 0); // supervision timeout 5527 event[20] = 0; // master clock accuracy 5528 hci_emit_event(event, sizeof(event), 1); 5529 } 5530 #endif 5531 #endif 5532 5533 static void hci_emit_transport_packet_sent(void){ 5534 // notify upper stack that it might be possible to send again 5535 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5536 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5537 } 5538 5539 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5540 uint8_t event[6]; 5541 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5542 event[1] = sizeof(event) - 2u; 5543 event[2] = 0; // status = OK 5544 little_endian_store_16(event, 3, con_handle); 5545 event[5] = reason; 5546 hci_emit_event(event, sizeof(event), 1); 5547 } 5548 5549 static void hci_emit_nr_connections_changed(void){ 5550 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5551 uint8_t event[3]; 5552 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5553 event[1] = sizeof(event) - 2u; 5554 event[2] = nr_hci_connections(); 5555 hci_emit_event(event, sizeof(event), 1); 5556 } 5557 5558 static void hci_emit_hci_open_failed(void){ 5559 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5560 uint8_t event[2]; 5561 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5562 event[1] = sizeof(event) - 2u; 5563 hci_emit_event(event, sizeof(event), 1); 5564 } 5565 5566 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5567 log_info("hci_emit_dedicated_bonding_result %u ", status); 5568 uint8_t event[9]; 5569 int pos = 0; 5570 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5571 event[pos++] = sizeof(event) - 2u; 5572 event[pos++] = status; 5573 reverse_bd_addr(address, &event[pos]); 5574 hci_emit_event(event, sizeof(event), 1); 5575 } 5576 5577 5578 #ifdef ENABLE_CLASSIC 5579 5580 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5581 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5582 uint8_t event[5]; 5583 int pos = 0; 5584 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5585 event[pos++] = sizeof(event) - 2; 5586 little_endian_store_16(event, 2, con_handle); 5587 pos += 2; 5588 event[pos++] = level; 5589 hci_emit_event(event, sizeof(event), 1); 5590 } 5591 5592 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5593 if (!connection) return LEVEL_0; 5594 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5595 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5596 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5597 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5598 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5599 // LEVEL 4 always requires 128 bit encrytion key size 5600 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5601 security_level = LEVEL_3; 5602 } 5603 return security_level; 5604 } 5605 5606 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5607 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5608 uint8_t event[3]; 5609 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5610 event[1] = sizeof(event) - 2; 5611 event[2] = enabled; 5612 hci_emit_event(event, sizeof(event), 1); 5613 } 5614 5615 // query if remote side supports eSCO 5616 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5617 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5618 if (!connection) return false; 5619 return (connection->remote_supported_features[0] & 1) != 0; 5620 } 5621 5622 static bool hci_ssp_supported(hci_connection_t * connection){ 5623 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5624 return (connection->bonding_flags & mask) == mask; 5625 } 5626 5627 // query if remote side supports SSP 5628 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5629 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5630 if (!connection) return false; 5631 return hci_ssp_supported(connection) ? 1 : 0; 5632 } 5633 5634 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5635 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5636 } 5637 5638 // GAP API 5639 /** 5640 * @bbrief enable/disable bonding. default is enabled 5641 * @praram enabled 5642 */ 5643 void gap_set_bondable_mode(int enable){ 5644 hci_stack->bondable = enable ? 1 : 0; 5645 } 5646 /** 5647 * @brief Get bondable mode. 5648 * @return 1 if bondable 5649 */ 5650 int gap_get_bondable_mode(void){ 5651 return hci_stack->bondable; 5652 } 5653 5654 /** 5655 * @brief map link keys to security levels 5656 */ 5657 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5658 switch (link_key_type){ 5659 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5660 return LEVEL_4; 5661 case COMBINATION_KEY: 5662 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5663 return LEVEL_3; 5664 default: 5665 return LEVEL_2; 5666 } 5667 } 5668 5669 /** 5670 * @brief map link keys to secure connection yes/no 5671 */ 5672 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5673 switch (link_key_type){ 5674 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5675 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5676 return 1; 5677 default: 5678 return 0; 5679 } 5680 } 5681 5682 /** 5683 * @brief map link keys to authenticated 5684 */ 5685 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5686 switch (link_key_type){ 5687 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5688 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5689 return 1; 5690 default: 5691 return 0; 5692 } 5693 } 5694 5695 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5696 log_info("gap_mitm_protection_required_for_security_level %u", level); 5697 return level > LEVEL_2; 5698 } 5699 5700 /** 5701 * @brief get current security level 5702 */ 5703 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5704 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5705 if (!connection) return LEVEL_0; 5706 return gap_security_level_for_connection(connection); 5707 } 5708 5709 /** 5710 * @brief request connection to device to 5711 * @result GAP_AUTHENTICATION_RESULT 5712 */ 5713 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5714 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5715 if (!connection){ 5716 hci_emit_security_level(con_handle, LEVEL_0); 5717 return; 5718 } 5719 5720 btstack_assert(hci_is_le_connection(connection) == false); 5721 5722 // 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) 5723 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5724 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5725 requested_level = LEVEL_4; 5726 } 5727 5728 gap_security_level_t current_level = gap_security_level(con_handle); 5729 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5730 requested_level, connection->requested_security_level, current_level); 5731 5732 // authentication active if authentication request was sent or planned level > 0 5733 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5734 if (authentication_active){ 5735 // authentication already active 5736 if (connection->requested_security_level < requested_level){ 5737 // increase requested level as new level is higher 5738 // TODO: handle re-authentication when done 5739 connection->requested_security_level = requested_level; 5740 } 5741 } else { 5742 // no request active, notify if security sufficient 5743 if (requested_level <= current_level){ 5744 hci_emit_security_level(con_handle, current_level); 5745 return; 5746 } 5747 5748 // store request 5749 connection->requested_security_level = requested_level; 5750 5751 // start to authenticate connection 5752 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5753 hci_run(); 5754 } 5755 } 5756 5757 /** 5758 * @brief start dedicated bonding with device. disconnect after bonding 5759 * @param device 5760 * @param request MITM protection 5761 * @result GAP_DEDICATED_BONDING_COMPLETE 5762 */ 5763 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5764 5765 // create connection state machine 5766 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5767 5768 if (!connection){ 5769 return BTSTACK_MEMORY_ALLOC_FAILED; 5770 } 5771 5772 // delete linkn key 5773 gap_drop_link_key_for_bd_addr(device); 5774 5775 // configure LEVEL_2/3, dedicated bonding 5776 connection->state = SEND_CREATE_CONNECTION; 5777 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5778 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5779 connection->bonding_flags = BONDING_DEDICATED; 5780 5781 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5782 5783 // handle: connnection failure (connection complete != ok) 5784 // handle: authentication failure 5785 // handle: disconnect on done 5786 5787 hci_run(); 5788 5789 return 0; 5790 } 5791 5792 void gap_set_local_name(const char * local_name){ 5793 hci_stack->local_name = local_name; 5794 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5795 // also update EIR if not set by user 5796 if (hci_stack->eir_data == NULL){ 5797 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5798 } 5799 hci_run(); 5800 } 5801 #endif 5802 5803 5804 #ifdef ENABLE_BLE 5805 5806 #ifdef ENABLE_LE_CENTRAL 5807 void gap_start_scan(void){ 5808 hci_stack->le_scanning_enabled = true; 5809 hci_run(); 5810 } 5811 5812 void gap_stop_scan(void){ 5813 hci_stack->le_scanning_enabled = false; 5814 hci_run(); 5815 } 5816 5817 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5818 hci_stack->le_scan_type = scan_type; 5819 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5820 hci_stack->le_scan_interval = scan_interval; 5821 hci_stack->le_scan_window = scan_window; 5822 hci_stack->le_scanning_param_update = true; 5823 hci_run(); 5824 } 5825 5826 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5827 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5828 } 5829 5830 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5831 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5832 if (!conn){ 5833 // disallow if le connection is already outgoing 5834 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5835 log_error("le connection already active"); 5836 return ERROR_CODE_COMMAND_DISALLOWED; 5837 } 5838 5839 log_info("gap_connect: no connection exists yet, creating context"); 5840 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5841 if (!conn){ 5842 // notify client that alloc failed 5843 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5844 log_info("gap_connect: failed to alloc hci_connection_t"); 5845 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5846 } 5847 5848 // set le connecting state 5849 if (hci_is_le_connection_type(addr_type)){ 5850 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5851 } 5852 5853 conn->state = SEND_CREATE_CONNECTION; 5854 log_info("gap_connect: send create connection next"); 5855 hci_run(); 5856 return ERROR_CODE_SUCCESS; 5857 } 5858 5859 if (!hci_is_le_connection(conn) || 5860 (conn->state == SEND_CREATE_CONNECTION) || 5861 (conn->state == SENT_CREATE_CONNECTION)) { 5862 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5863 log_error("gap_connect: classic connection or connect is already being created"); 5864 return GATT_CLIENT_IN_WRONG_STATE; 5865 } 5866 5867 // check if connection was just disconnected 5868 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5869 log_info("gap_connect: send create connection (again)"); 5870 conn->state = SEND_CREATE_CONNECTION; 5871 hci_run(); 5872 return ERROR_CODE_SUCCESS; 5873 } 5874 5875 log_info("gap_connect: context exists with state %u", conn->state); 5876 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5877 hci_run(); 5878 return ERROR_CODE_SUCCESS; 5879 } 5880 5881 // @assumption: only a single outgoing LE Connection exists 5882 static hci_connection_t * gap_get_outgoing_connection(void){ 5883 btstack_linked_item_t *it; 5884 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5885 hci_connection_t * conn = (hci_connection_t *) it; 5886 if (!hci_is_le_connection(conn)) continue; 5887 switch (conn->state){ 5888 case SEND_CREATE_CONNECTION: 5889 case SENT_CREATE_CONNECTION: 5890 case SENT_CANCEL_CONNECTION: 5891 return conn; 5892 default: 5893 break; 5894 }; 5895 } 5896 return NULL; 5897 } 5898 5899 uint8_t gap_connect_cancel(void){ 5900 hci_connection_t * conn = gap_get_outgoing_connection(); 5901 if (!conn) return 0; 5902 switch (conn->state){ 5903 case SEND_CREATE_CONNECTION: 5904 // skip sending create connection and emit event instead 5905 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5906 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5907 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5908 btstack_memory_hci_connection_free( conn ); 5909 break; 5910 case SENT_CREATE_CONNECTION: 5911 // request to send cancel connection 5912 conn->state = SEND_CANCEL_CONNECTION; 5913 hci_run(); 5914 break; 5915 default: 5916 break; 5917 } 5918 return 0; 5919 } 5920 #endif 5921 5922 #ifdef ENABLE_LE_CENTRAL 5923 /** 5924 * @brief Set connection parameters for outgoing connections 5925 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5926 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5927 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5928 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5929 * @param conn_latency, default: 4 5930 * @param supervision_timeout (unit: 10ms), default: 720 ms 5931 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5932 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5933 */ 5934 5935 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5936 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5937 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5938 hci_stack->le_connection_scan_interval = conn_scan_interval; 5939 hci_stack->le_connection_scan_window = conn_scan_window; 5940 hci_stack->le_connection_interval_min = conn_interval_min; 5941 hci_stack->le_connection_interval_max = conn_interval_max; 5942 hci_stack->le_connection_latency = conn_latency; 5943 hci_stack->le_supervision_timeout = supervision_timeout; 5944 hci_stack->le_minimum_ce_length = min_ce_length; 5945 hci_stack->le_maximum_ce_length = max_ce_length; 5946 } 5947 #endif 5948 5949 /** 5950 * @brief Updates the connection parameters for a given LE connection 5951 * @param handle 5952 * @param conn_interval_min (unit: 1.25ms) 5953 * @param conn_interval_max (unit: 1.25ms) 5954 * @param conn_latency 5955 * @param supervision_timeout (unit: 10ms) 5956 * @returns 0 if ok 5957 */ 5958 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5959 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5960 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5961 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5962 connection->le_conn_interval_min = conn_interval_min; 5963 connection->le_conn_interval_max = conn_interval_max; 5964 connection->le_conn_latency = conn_latency; 5965 connection->le_supervision_timeout = supervision_timeout; 5966 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5967 hci_run(); 5968 return 0; 5969 } 5970 5971 /** 5972 * @brief Request an update of the connection parameter for a given LE connection 5973 * @param handle 5974 * @param conn_interval_min (unit: 1.25ms) 5975 * @param conn_interval_max (unit: 1.25ms) 5976 * @param conn_latency 5977 * @param supervision_timeout (unit: 10ms) 5978 * @returns 0 if ok 5979 */ 5980 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5981 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5982 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5983 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5984 connection->le_conn_interval_min = conn_interval_min; 5985 connection->le_conn_interval_max = conn_interval_max; 5986 connection->le_conn_latency = conn_latency; 5987 connection->le_supervision_timeout = supervision_timeout; 5988 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5989 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5990 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5991 return 0; 5992 } 5993 5994 #ifdef ENABLE_LE_PERIPHERAL 5995 5996 /** 5997 * @brief Set Advertisement Data 5998 * @param advertising_data_length 5999 * @param advertising_data (max 31 octets) 6000 * @note data is not copied, pointer has to stay valid 6001 */ 6002 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6003 hci_stack->le_advertisements_data_len = advertising_data_length; 6004 hci_stack->le_advertisements_data = advertising_data; 6005 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6006 hci_run(); 6007 } 6008 6009 /** 6010 * @brief Set Scan Response Data 6011 * @param advertising_data_length 6012 * @param advertising_data (max 31 octets) 6013 * @note data is not copied, pointer has to stay valid 6014 */ 6015 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6016 hci_stack->le_scan_response_data_len = scan_response_data_length; 6017 hci_stack->le_scan_response_data = scan_response_data; 6018 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6019 hci_run(); 6020 } 6021 6022 /** 6023 * @brief Set Advertisement Parameters 6024 * @param adv_int_min 6025 * @param adv_int_max 6026 * @param adv_type 6027 * @param direct_address_type 6028 * @param direct_address 6029 * @param channel_map 6030 * @param filter_policy 6031 * 6032 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6033 */ 6034 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6035 uint8_t direct_address_typ, bd_addr_t direct_address, 6036 uint8_t channel_map, uint8_t filter_policy) { 6037 6038 hci_stack->le_advertisements_interval_min = adv_int_min; 6039 hci_stack->le_advertisements_interval_max = adv_int_max; 6040 hci_stack->le_advertisements_type = adv_type; 6041 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6042 hci_stack->le_advertisements_channel_map = channel_map; 6043 hci_stack->le_advertisements_filter_policy = filter_policy; 6044 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6045 6); 6046 6047 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6048 hci_run(); 6049 } 6050 6051 /** 6052 * @brief Enable/Disable Advertisements 6053 * @param enabled 6054 */ 6055 void gap_advertisements_enable(int enabled){ 6056 hci_stack->le_advertisements_enabled = enabled != 0; 6057 hci_update_advertisements_enabled_for_current_roles(); 6058 hci_run(); 6059 } 6060 6061 #endif 6062 6063 void hci_le_set_own_address_type(uint8_t own_address_type){ 6064 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6065 if (own_address_type == hci_stack->le_own_addr_type) return; 6066 hci_stack->le_own_addr_type = own_address_type; 6067 6068 #ifdef ENABLE_LE_PERIPHERAL 6069 // update advertisement parameters, too 6070 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6071 hci_run(); 6072 #endif 6073 #ifdef ENABLE_LE_CENTRAL 6074 // note: we don't update scan parameters or modify ongoing connection attempts 6075 #endif 6076 } 6077 6078 #endif 6079 6080 uint8_t gap_disconnect(hci_con_handle_t handle){ 6081 hci_connection_t * conn = hci_connection_for_handle(handle); 6082 if (!conn){ 6083 hci_emit_disconnection_complete(handle, 0); 6084 return 0; 6085 } 6086 // ignore if already disconnected 6087 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6088 return 0; 6089 } 6090 conn->state = SEND_DISCONNECT; 6091 hci_run(); 6092 return 0; 6093 } 6094 6095 int gap_read_rssi(hci_con_handle_t con_handle){ 6096 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6097 if (hci_connection == NULL) return 0; 6098 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6099 hci_run(); 6100 return 1; 6101 } 6102 6103 /** 6104 * @brief Get connection type 6105 * @param con_handle 6106 * @result connection_type 6107 */ 6108 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6109 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6110 if (!conn) return GAP_CONNECTION_INVALID; 6111 switch (conn->address_type){ 6112 case BD_ADDR_TYPE_LE_PUBLIC: 6113 case BD_ADDR_TYPE_LE_RANDOM: 6114 return GAP_CONNECTION_LE; 6115 case BD_ADDR_TYPE_SCO: 6116 return GAP_CONNECTION_SCO; 6117 case BD_ADDR_TYPE_ACL: 6118 return GAP_CONNECTION_ACL; 6119 default: 6120 return GAP_CONNECTION_INVALID; 6121 } 6122 } 6123 6124 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6125 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6126 if (!conn) return HCI_ROLE_INVALID; 6127 return (hci_role_t) conn->role; 6128 } 6129 6130 6131 #ifdef ENABLE_CLASSIC 6132 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6133 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6134 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6135 conn->request_role = role; 6136 hci_run(); 6137 return ERROR_CODE_SUCCESS; 6138 } 6139 #endif 6140 6141 #ifdef ENABLE_BLE 6142 6143 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){ 6144 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6145 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6146 6147 conn->le_phy_update_all_phys = all_phys; 6148 conn->le_phy_update_tx_phys = tx_phys; 6149 conn->le_phy_update_rx_phys = rx_phys; 6150 conn->le_phy_update_phy_options = phy_options; 6151 6152 hci_run(); 6153 6154 return 0; 6155 } 6156 6157 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6158 // check if already in list 6159 btstack_linked_list_iterator_t it; 6160 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6161 while (btstack_linked_list_iterator_has_next(&it)) { 6162 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6163 if (entry->address_type != address_type) { 6164 continue; 6165 } 6166 if (memcmp(entry->address, address, 6) != 0) { 6167 continue; 6168 } 6169 // disallow if already scheduled to add 6170 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6171 return ERROR_CODE_COMMAND_DISALLOWED; 6172 } 6173 // still on controller, but scheduled to remove -> re-add 6174 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6175 return ERROR_CODE_SUCCESS; 6176 } 6177 // alloc and add to list 6178 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6179 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6180 entry->address_type = address_type; 6181 (void)memcpy(entry->address, address, 6); 6182 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6183 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6184 return ERROR_CODE_SUCCESS; 6185 } 6186 6187 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6188 btstack_linked_list_iterator_t it; 6189 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6190 while (btstack_linked_list_iterator_has_next(&it)){ 6191 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6192 if (entry->address_type != address_type) { 6193 continue; 6194 } 6195 if (memcmp(entry->address, address, 6) != 0) { 6196 continue; 6197 } 6198 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6199 // remove from controller if already present 6200 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6201 } else { 6202 // directly remove entry from whitelist 6203 btstack_linked_list_iterator_remove(&it); 6204 btstack_memory_whitelist_entry_free(entry); 6205 } 6206 return ERROR_CODE_SUCCESS; 6207 } 6208 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6209 } 6210 6211 static void hci_whitelist_clear(void){ 6212 btstack_linked_list_iterator_t it; 6213 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6214 while (btstack_linked_list_iterator_has_next(&it)){ 6215 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6216 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6217 // remove from controller if already present 6218 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6219 continue; 6220 } 6221 // directly remove entry from whitelist 6222 btstack_linked_list_iterator_remove(&it); 6223 btstack_memory_whitelist_entry_free(entry); 6224 } 6225 } 6226 6227 /** 6228 * @brief Clear Whitelist 6229 * @returns 0 if ok 6230 */ 6231 uint8_t gap_whitelist_clear(void){ 6232 hci_whitelist_clear(); 6233 hci_run(); 6234 return ERROR_CODE_SUCCESS; 6235 } 6236 6237 /** 6238 * @brief Add Device to Whitelist 6239 * @param address_typ 6240 * @param address 6241 * @returns 0 if ok 6242 */ 6243 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6244 uint8_t status = hci_whitelist_add(address_type, address); 6245 if (status){ 6246 return status; 6247 } 6248 hci_run(); 6249 return ERROR_CODE_SUCCESS; 6250 } 6251 6252 /** 6253 * @brief Remove Device from Whitelist 6254 * @param address_typ 6255 * @param address 6256 * @returns 0 if ok 6257 */ 6258 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6259 uint8_t status = hci_whitelist_remove(address_type, address); 6260 if (status){ 6261 return status; 6262 } 6263 hci_run(); 6264 return ERROR_CODE_SUCCESS; 6265 } 6266 6267 #ifdef ENABLE_LE_CENTRAL 6268 /** 6269 * @brief Connect with Whitelist 6270 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6271 * @returns - if ok 6272 */ 6273 uint8_t gap_connect_with_whitelist(void){ 6274 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6275 return ERROR_CODE_COMMAND_DISALLOWED; 6276 } 6277 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6278 hci_run(); 6279 return ERROR_CODE_SUCCESS; 6280 } 6281 6282 /** 6283 * @brief Auto Connection Establishment - Start Connecting to device 6284 * @param address_typ 6285 * @param address 6286 * @returns 0 if ok 6287 */ 6288 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6289 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6290 return ERROR_CODE_COMMAND_DISALLOWED; 6291 } 6292 6293 uint8_t status = hci_whitelist_add(address_type, address); 6294 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6295 return status; 6296 } 6297 6298 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6299 6300 hci_run(); 6301 return ERROR_CODE_SUCCESS; 6302 } 6303 6304 /** 6305 * @brief Auto Connection Establishment - Stop Connecting to device 6306 * @param address_typ 6307 * @param address 6308 * @returns 0 if ok 6309 */ 6310 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6311 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6312 return ERROR_CODE_COMMAND_DISALLOWED; 6313 } 6314 6315 hci_whitelist_remove(address_type, address); 6316 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6317 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6318 } 6319 hci_run(); 6320 return 0; 6321 } 6322 6323 /** 6324 * @brief Auto Connection Establishment - Stop everything 6325 * @note Convenience function to stop all active auto connection attempts 6326 */ 6327 uint8_t gap_auto_connection_stop_all(void){ 6328 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6329 return ERROR_CODE_COMMAND_DISALLOWED; 6330 } 6331 hci_whitelist_clear(); 6332 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6333 hci_run(); 6334 return ERROR_CODE_SUCCESS; 6335 } 6336 6337 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6338 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6339 if (!conn) return 0; 6340 return conn->le_connection_interval; 6341 } 6342 #endif 6343 #endif 6344 6345 #ifdef ENABLE_CLASSIC 6346 /** 6347 * @brief Set Extended Inquiry Response data 6348 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6349 * @note has to be done before stack starts up 6350 */ 6351 void gap_set_extended_inquiry_response(const uint8_t * data){ 6352 hci_stack->eir_data = data; 6353 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6354 hci_run(); 6355 } 6356 6357 /** 6358 * @brief Start GAP Classic Inquiry 6359 * @param duration in 1.28s units 6360 * @return 0 if ok 6361 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6362 */ 6363 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6364 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6365 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6366 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6367 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6368 } 6369 hci_stack->inquiry_state = duration_in_1280ms_units; 6370 hci_run(); 6371 return 0; 6372 } 6373 6374 /** 6375 * @brief Stop GAP Classic Inquiry 6376 * @returns 0 if ok 6377 */ 6378 int gap_inquiry_stop(void){ 6379 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6380 // emit inquiry complete event, before it even started 6381 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6382 hci_emit_event(event, sizeof(event), 1); 6383 return 0; 6384 } 6385 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6386 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6387 hci_run(); 6388 return 0; 6389 } 6390 6391 void gap_inquiry_set_lap(uint32_t lap){ 6392 hci_stack->inquiry_lap = lap; 6393 } 6394 6395 6396 /** 6397 * @brief Remote Name Request 6398 * @param addr 6399 * @param page_scan_repetition_mode 6400 * @param clock_offset only used when bit 15 is set 6401 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6402 */ 6403 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6404 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6405 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6406 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6407 hci_stack->remote_name_clock_offset = clock_offset; 6408 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6409 hci_run(); 6410 return 0; 6411 } 6412 6413 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6414 hci_stack->gap_pairing_state = state; 6415 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6416 hci_run(); 6417 return 0; 6418 } 6419 6420 /** 6421 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6422 * @param addr 6423 * @param pin_data 6424 * @param pin_len 6425 * @return 0 if ok 6426 */ 6427 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6428 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6429 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6430 hci_stack->gap_pairing_pin_len = pin_len; 6431 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6432 } 6433 6434 /** 6435 * @brief Legacy Pairing Pin Code Response 6436 * @param addr 6437 * @param pin 6438 * @return 0 if ok 6439 */ 6440 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6441 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6442 } 6443 6444 /** 6445 * @brief Abort Legacy Pairing 6446 * @param addr 6447 * @param pin 6448 * @return 0 if ok 6449 */ 6450 int gap_pin_code_negative(bd_addr_t addr){ 6451 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6452 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6453 } 6454 6455 /** 6456 * @brief SSP Passkey Response 6457 * @param addr 6458 * @param passkey 6459 * @return 0 if ok 6460 */ 6461 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6462 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6463 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6464 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6465 } 6466 6467 /** 6468 * @brief Abort SSP Passkey Entry/Pairing 6469 * @param addr 6470 * @param pin 6471 * @return 0 if ok 6472 */ 6473 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6474 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6475 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6476 } 6477 6478 /** 6479 * @brief Accept SSP Numeric Comparison 6480 * @param addr 6481 * @param passkey 6482 * @return 0 if ok 6483 */ 6484 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6485 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6486 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6487 } 6488 6489 /** 6490 * @brief Abort SSP Numeric Comparison/Pairing 6491 * @param addr 6492 * @param pin 6493 * @return 0 if ok 6494 */ 6495 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6496 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6497 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6498 } 6499 6500 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6501 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6502 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6503 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6504 connectionSetAuthenticationFlags(conn, flag); 6505 hci_run(); 6506 return ERROR_CODE_SUCCESS; 6507 } 6508 #endif 6509 6510 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6511 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6512 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6513 } 6514 6515 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6516 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6517 } 6518 #endif 6519 6520 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6521 /** 6522 * @brief Report Remote OOB Data 6523 * @param bd_addr 6524 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6525 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6526 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6527 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6528 */ 6529 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){ 6530 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6531 if (connection == NULL) { 6532 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6533 } 6534 connection->classic_oob_c_192 = c_192; 6535 connection->classic_oob_r_192 = r_192; 6536 6537 // ignore P-256 if not supported by us 6538 if (hci_stack->secure_connections_active){ 6539 connection->classic_oob_c_256 = c_256; 6540 connection->classic_oob_r_256 = r_256; 6541 } 6542 6543 return ERROR_CODE_SUCCESS; 6544 } 6545 /** 6546 * @brief Generate new OOB data 6547 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6548 */ 6549 void gap_ssp_generate_oob_data(void){ 6550 hci_stack->classic_read_local_oob_data = true; 6551 hci_run(); 6552 } 6553 6554 #endif 6555 6556 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6557 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6558 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6559 if (connection == NULL) { 6560 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6561 } 6562 6563 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6564 connection->link_key_type = type; 6565 6566 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6567 } 6568 6569 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6570 /** 6571 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6572 * @param inquiry_mode see bluetooth_defines.h 6573 */ 6574 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6575 hci_stack->inquiry_mode = inquiry_mode; 6576 } 6577 6578 /** 6579 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6580 */ 6581 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6582 hci_stack->sco_voice_setting = voice_setting; 6583 } 6584 6585 /** 6586 * @brief Get SCO Voice Setting 6587 * @return current voice setting 6588 */ 6589 uint16_t hci_get_sco_voice_setting(void){ 6590 return hci_stack->sco_voice_setting; 6591 } 6592 6593 static int hci_have_usb_transport(void){ 6594 if (!hci_stack->hci_transport) return 0; 6595 const char * transport_name = hci_stack->hci_transport->name; 6596 if (!transport_name) return 0; 6597 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6598 } 6599 6600 /** @brief Get SCO packet length for current SCO Voice setting 6601 * @note Using SCO packets of the exact length is required for USB transfer 6602 * @return Length of SCO packets in bytes (not audio frames) 6603 */ 6604 uint16_t hci_get_sco_packet_length(void){ 6605 uint16_t sco_packet_length = 0; 6606 6607 #ifdef ENABLE_SCO_OVER_HCI 6608 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6609 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6610 6611 if (hci_have_usb_transport()){ 6612 // see Core Spec for H2 USB Transfer. 6613 // 3 byte SCO header + 24 bytes per connection 6614 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6615 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6616 } else { 6617 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6618 sco_packet_length = 3 + 60 * multiplier; 6619 // assert that it still fits inside an SCO buffer 6620 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6621 sco_packet_length = 3 + 60; 6622 } 6623 } 6624 #endif 6625 6626 #ifdef HAVE_SCO_TRANSPORT 6627 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6628 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6629 sco_packet_length = 3 + 60 * multiplier; 6630 #endif 6631 return sco_packet_length; 6632 } 6633 6634 /** 6635 * @brief Sets the master/slave policy 6636 * @param policy (0: attempt to become master, 1: let connecting device decide) 6637 */ 6638 void hci_set_master_slave_policy(uint8_t policy){ 6639 hci_stack->master_slave_policy = policy; 6640 } 6641 6642 #endif 6643 6644 HCI_STATE hci_get_state(void){ 6645 return hci_stack->state; 6646 } 6647 6648 #ifdef ENABLE_CLASSIC 6649 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6650 hci_stack->gap_classic_accept_callback = accept_callback; 6651 } 6652 #endif 6653 6654 /** 6655 * @brief Set callback for Bluetooth Hardware Error 6656 */ 6657 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6658 hci_stack->hardware_error_callback = fn; 6659 } 6660 6661 void hci_disconnect_all(void){ 6662 btstack_linked_list_iterator_t it; 6663 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6664 while (btstack_linked_list_iterator_has_next(&it)){ 6665 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6666 if (con->state == SENT_DISCONNECT) continue; 6667 con->state = SEND_DISCONNECT; 6668 } 6669 hci_run(); 6670 } 6671 6672 uint16_t hci_get_manufacturer(void){ 6673 return hci_stack->manufacturer; 6674 } 6675 6676 #ifdef ENABLE_BLE 6677 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6678 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6679 if (!hci_con) return NULL; 6680 return &hci_con->sm_connection; 6681 } 6682 6683 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6684 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6685 #endif 6686 6687 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6688 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6689 if (hci_connection == NULL) return 0; 6690 if (hci_is_le_connection(hci_connection)){ 6691 #ifdef ENABLE_BLE 6692 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6693 if (sm_conn->sm_connection_encrypted) { 6694 return sm_conn->sm_actual_encryption_key_size; 6695 } 6696 #endif 6697 } else { 6698 #ifdef ENABLE_CLASSIC 6699 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6700 return hci_connection->encryption_key_size; 6701 } 6702 #endif 6703 } 6704 return 0; 6705 } 6706 6707 int gap_authenticated(hci_con_handle_t con_handle){ 6708 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6709 if (hci_connection == NULL) return 0; 6710 6711 switch (hci_connection->address_type){ 6712 #ifdef ENABLE_BLE 6713 case BD_ADDR_TYPE_LE_PUBLIC: 6714 case BD_ADDR_TYPE_LE_RANDOM: 6715 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6716 return hci_connection->sm_connection.sm_connection_authenticated; 6717 #endif 6718 #ifdef ENABLE_CLASSIC 6719 case BD_ADDR_TYPE_SCO: 6720 case BD_ADDR_TYPE_ACL: 6721 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6722 #endif 6723 default: 6724 return 0; 6725 } 6726 } 6727 6728 int gap_secure_connection(hci_con_handle_t con_handle){ 6729 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6730 if (hci_connection == NULL) return 0; 6731 6732 switch (hci_connection->address_type){ 6733 #ifdef ENABLE_BLE 6734 case BD_ADDR_TYPE_LE_PUBLIC: 6735 case BD_ADDR_TYPE_LE_RANDOM: 6736 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6737 return hci_connection->sm_connection.sm_connection_sc; 6738 #endif 6739 #ifdef ENABLE_CLASSIC 6740 case BD_ADDR_TYPE_SCO: 6741 case BD_ADDR_TYPE_ACL: 6742 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6743 #endif 6744 default: 6745 return 0; 6746 } 6747 } 6748 6749 bool gap_bonded(hci_con_handle_t con_handle){ 6750 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6751 if (hci_connection == NULL) return 0; 6752 6753 #ifdef ENABLE_CLASSIC 6754 link_key_t link_key; 6755 link_key_type_t link_key_type; 6756 #endif 6757 switch (hci_connection->address_type){ 6758 #ifdef ENABLE_BLE 6759 case BD_ADDR_TYPE_LE_PUBLIC: 6760 case BD_ADDR_TYPE_LE_RANDOM: 6761 return hci_connection->sm_connection.sm_le_db_index >= 0; 6762 #endif 6763 #ifdef ENABLE_CLASSIC 6764 case BD_ADDR_TYPE_SCO: 6765 case BD_ADDR_TYPE_ACL: 6766 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6767 #endif 6768 default: 6769 return false; 6770 } 6771 } 6772 6773 #ifdef ENABLE_BLE 6774 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6775 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6776 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6777 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6778 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6779 return sm_conn->sm_connection_authorization_state; 6780 } 6781 #endif 6782 6783 #ifdef ENABLE_CLASSIC 6784 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){ 6785 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6786 if (!conn) return GAP_CONNECTION_INVALID; 6787 conn->sniff_min_interval = sniff_min_interval; 6788 conn->sniff_max_interval = sniff_max_interval; 6789 conn->sniff_attempt = sniff_attempt; 6790 conn->sniff_timeout = sniff_timeout; 6791 hci_run(); 6792 return 0; 6793 } 6794 6795 /** 6796 * @brief Exit Sniff mode 6797 * @param con_handle 6798 @ @return 0 if ok 6799 */ 6800 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6801 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6802 if (!conn) return GAP_CONNECTION_INVALID; 6803 conn->sniff_min_interval = 0xffff; 6804 hci_run(); 6805 return 0; 6806 } 6807 6808 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){ 6809 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6810 if (!conn) return GAP_CONNECTION_INVALID; 6811 conn->sniff_subrating_max_latency = max_latency; 6812 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6813 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6814 hci_run(); 6815 return ERROR_CODE_SUCCESS; 6816 } 6817 6818 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){ 6819 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6820 if (!conn) return GAP_CONNECTION_INVALID; 6821 conn->qos_service_type = service_type; 6822 conn->qos_token_rate = token_rate; 6823 conn->qos_peak_bandwidth = peak_bandwidth; 6824 conn->qos_latency = latency; 6825 conn->qos_delay_variation = delay_variation; 6826 hci_run(); 6827 return ERROR_CODE_SUCCESS; 6828 } 6829 6830 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6831 hci_stack->new_page_scan_interval = page_scan_interval; 6832 hci_stack->new_page_scan_window = page_scan_window; 6833 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6834 hci_run(); 6835 } 6836 6837 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6838 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6839 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6840 hci_run(); 6841 } 6842 6843 #endif 6844 6845 void hci_halting_defer(void){ 6846 if (hci_stack->state != HCI_STATE_HALTING) return; 6847 switch (hci_stack->substate){ 6848 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6849 case HCI_HALTING_CLOSE: 6850 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6851 break; 6852 default: 6853 break; 6854 } 6855 } 6856 6857 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6858 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6859 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6860 if (le_device_db_index >= le_device_db_max_count()) return; 6861 uint8_t offset = le_device_db_index >> 3; 6862 uint8_t mask = 1 << (le_device_db_index & 7); 6863 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6864 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6865 // note: go back to remove entries, otherwise, a remove + add will skip the add 6866 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6867 } 6868 } 6869 6870 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6871 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6872 if (le_device_db_index >= le_device_db_max_count()) return; 6873 uint8_t offset = le_device_db_index >> 3; 6874 uint8_t mask = 1 << (le_device_db_index & 7); 6875 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6876 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6877 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6878 } 6879 } 6880 6881 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6882 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6883 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6884 } 6885 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6886 // restart le resolving list update 6887 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6888 } 6889 return ERROR_CODE_SUCCESS; 6890 } 6891 #endif 6892 6893 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6894 void hci_setup_test_connections_fuzz(void){ 6895 hci_connection_t * conn; 6896 6897 // default address: 66:55:44:33:00:01 6898 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6899 6900 // setup Controller info 6901 hci_stack->num_cmd_packets = 255; 6902 hci_stack->acl_packets_total_num = 255; 6903 6904 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6905 addr[5] = 0x01; 6906 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6907 conn->con_handle = addr[5]; 6908 conn->role = HCI_ROLE_SLAVE; 6909 conn->state = RECEIVED_CONNECTION_REQUEST; 6910 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6911 6912 // setup incoming Classic SCO connection with con handle 0x0002 6913 addr[5] = 0x02; 6914 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6915 conn->con_handle = addr[5]; 6916 conn->role = HCI_ROLE_SLAVE; 6917 conn->state = RECEIVED_CONNECTION_REQUEST; 6918 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6919 6920 // setup ready Classic ACL connection with con handle 0x0003 6921 addr[5] = 0x03; 6922 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6923 conn->con_handle = addr[5]; 6924 conn->role = HCI_ROLE_SLAVE; 6925 conn->state = OPEN; 6926 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6927 6928 // setup ready Classic SCO connection with con handle 0x0004 6929 addr[5] = 0x04; 6930 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6931 conn->con_handle = addr[5]; 6932 conn->role = HCI_ROLE_SLAVE; 6933 conn->state = OPEN; 6934 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6935 6936 // setup ready LE ACL connection with con handle 0x005 and public address 6937 addr[5] = 0x05; 6938 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6939 conn->con_handle = addr[5]; 6940 conn->role = HCI_ROLE_SLAVE; 6941 conn->state = OPEN; 6942 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6943 conn->sm_connection.sm_connection_encrypted = 1; 6944 } 6945 6946 void hci_free_connections_fuzz(void){ 6947 btstack_linked_list_iterator_t it; 6948 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6949 while (btstack_linked_list_iterator_has_next(&it)){ 6950 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6951 btstack_linked_list_iterator_remove(&it); 6952 btstack_memory_hci_connection_free(con); 6953 } 6954 } 6955 void hci_simulate_working_fuzz(void){ 6956 hci_init_done(); 6957 hci_stack->num_cmd_packets = 255; 6958 } 6959 #endif 6960