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 HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 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 ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #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." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_STATE_IDLE 0x00 119 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 120 #define GAP_INQUIRY_STATE_ACTIVE 0x81 121 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 122 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 123 124 // GAP Remote Name Request 125 #define GAP_REMOTE_NAME_STATE_IDLE 0 126 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 127 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 128 129 // GAP Pairing 130 #define GAP_PAIRING_STATE_IDLE 0 131 #define GAP_PAIRING_STATE_SEND_PIN 1 132 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 133 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 134 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 136 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 137 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 138 139 // prototypes 140 #ifdef ENABLE_CLASSIC 141 static void hci_update_scan_enable(void); 142 static void hci_emit_discoverable_enabled(uint8_t enabled); 143 static int hci_local_ssp_activated(void); 144 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 145 static bool hci_ssp_supported(hci_connection_t * connection); 146 static void hci_notify_if_sco_can_send_now(void); 147 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 148 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 149 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 150 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 151 static void hci_connection_timestamp(hci_connection_t *connection); 152 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 153 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 154 #endif 155 156 static int hci_power_control_on(void); 157 static void hci_power_control_off(void); 158 static void hci_state_reset(void); 159 static void hci_emit_transport_packet_sent(void); 160 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 161 static void hci_emit_nr_connections_changed(void); 162 static void hci_emit_hci_open_failed(void); 163 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 164 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 165 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 166 static void hci_run(void); 167 static int hci_is_le_connection(hci_connection_t * connection); 168 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 169 170 #ifdef ENABLE_CLASSIC 171 static int hci_have_usb_transport(void); 172 #endif 173 174 #ifdef ENABLE_BLE 175 #ifdef ENABLE_LE_CENTRAL 176 // called from test/ble_client/advertising_data_parser.c 177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 178 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 179 static hci_connection_t * gap_get_outgoing_connection(void); 180 #endif 181 #endif 182 183 // the STACK is here 184 #ifndef HAVE_MALLOC 185 static hci_stack_t hci_stack_static; 186 #endif 187 static hci_stack_t * hci_stack = NULL; 188 189 #ifdef ENABLE_CLASSIC 190 // default name 191 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 192 193 // test helper 194 static uint8_t disable_l2cap_timeouts = 0; 195 #endif 196 197 /** 198 * create connection for given address 199 * 200 * @return connection OR NULL, if no memory left 201 */ 202 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 203 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 204 hci_connection_t * conn = btstack_memory_hci_connection_get(); 205 if (!conn) return NULL; 206 bd_addr_copy(conn->address, addr); 207 conn->role = HCI_ROLE_INVALID; 208 conn->address_type = addr_type; 209 conn->con_handle = 0xffff; 210 conn->authentication_flags = AUTH_FLAG_NONE; 211 conn->bonding_flags = 0; 212 conn->requested_security_level = LEVEL_0; 213 #ifdef ENABLE_CLASSIC 214 conn->request_role = HCI_ROLE_INVALID; 215 conn->sniff_subrating_max_latency = 0xffff; 216 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 217 conn->link_key_type = INVALID_LINK_KEY; 218 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 219 btstack_run_loop_set_timer_context(&conn->timeout, conn); 220 hci_connection_timestamp(conn); 221 #endif 222 conn->acl_recombination_length = 0; 223 conn->acl_recombination_pos = 0; 224 conn->num_packets_sent = 0; 225 226 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 227 #ifdef ENABLE_BLE 228 conn->le_phy_update_all_phys = 0xff; 229 #endif 230 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 231 conn->le_max_tx_octets = 27; 232 #endif 233 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 234 return conn; 235 } 236 237 238 /** 239 * get le connection parameter range 240 * 241 * @return le connection parameter range struct 242 */ 243 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 244 *range = hci_stack->le_connection_parameter_range; 245 } 246 247 /** 248 * set le connection parameter range 249 * 250 */ 251 252 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 253 hci_stack->le_connection_parameter_range = *range; 254 } 255 256 /** 257 * @brief Test if connection parameters are inside in existing rage 258 * @param conn_interval_min (unit: 1.25ms) 259 * @param conn_interval_max (unit: 1.25ms) 260 * @param conn_latency 261 * @param supervision_timeout (unit: 10ms) 262 * @returns 1 if included 263 */ 264 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){ 265 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 266 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 267 268 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 269 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 270 271 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 272 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 273 274 return 1; 275 } 276 277 /** 278 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 279 * @note: default: 1 280 * @param max_peripheral_connections 281 */ 282 #ifdef ENABLE_LE_PERIPHERAL 283 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 284 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 285 } 286 #endif 287 288 /** 289 * get hci connections iterator 290 * 291 * @return hci connections iterator 292 */ 293 294 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 295 btstack_linked_list_iterator_init(it, &hci_stack->connections); 296 } 297 298 /** 299 * get connection for a given handle 300 * 301 * @return connection OR NULL, if not found 302 */ 303 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 304 btstack_linked_list_iterator_t it; 305 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 306 while (btstack_linked_list_iterator_has_next(&it)){ 307 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 308 if ( item->con_handle == con_handle ) { 309 return item; 310 } 311 } 312 return NULL; 313 } 314 315 /** 316 * get connection for given address 317 * 318 * @return connection OR NULL, if not found 319 */ 320 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 321 btstack_linked_list_iterator_t it; 322 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 323 while (btstack_linked_list_iterator_has_next(&it)){ 324 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 325 if (connection->address_type != addr_type) continue; 326 if (memcmp(addr, connection->address, 6) != 0) continue; 327 return connection; 328 } 329 return NULL; 330 } 331 332 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 333 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 334 } 335 336 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 337 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 338 } 339 340 #ifdef ENABLE_CLASSIC 341 342 #ifdef ENABLE_SCO_OVER_HCI 343 static int hci_number_sco_connections(void){ 344 int connections = 0; 345 btstack_linked_list_iterator_t it; 346 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 347 while (btstack_linked_list_iterator_has_next(&it)){ 348 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 349 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 350 connections++; 351 } 352 return connections; 353 } 354 #endif 355 356 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 357 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 358 #ifdef HAVE_EMBEDDED_TICK 359 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 360 // connections might be timed out 361 hci_emit_l2cap_check_timeout(connection); 362 } 363 #else 364 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 365 // connections might be timed out 366 hci_emit_l2cap_check_timeout(connection); 367 } 368 #endif 369 } 370 371 static void hci_connection_timestamp(hci_connection_t *connection){ 372 #ifdef HAVE_EMBEDDED_TICK 373 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 374 #else 375 connection->timestamp = btstack_run_loop_get_time_ms(); 376 #endif 377 } 378 379 /** 380 * add authentication flags and reset timer 381 * @note: assumes classic connection 382 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 383 */ 384 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 385 bd_addr_t addr; 386 reverse_bd_addr(bd_addr, addr); 387 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 388 if (conn) { 389 connectionSetAuthenticationFlags(conn, flags); 390 hci_connection_timestamp(conn); 391 } 392 } 393 394 static bool hci_pairing_active(hci_connection_t * hci_connection){ 395 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 396 } 397 398 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 399 if (hci_pairing_active(hci_connection)) return; 400 if (ssp){ 401 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 402 } else { 403 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 404 } 405 // if we are initiator, we have sent an HCI Authenticate Request 406 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 407 408 // if we are responder, use minimal service security level as required level 409 if (!initiator){ 410 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); 411 } 412 413 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 414 415 uint8_t event[12]; 416 event[0] = GAP_EVENT_PAIRING_STARTED; 417 event[1] = 10; 418 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 419 reverse_bd_addr(hci_connection->address, &event[4]); 420 event[10] = (uint8_t) ssp; 421 event[11] = (uint8_t) initiator; 422 hci_emit_event(event, sizeof(event), 1); 423 } 424 425 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 426 hci_connection->requested_security_level = LEVEL_0; 427 if (!hci_pairing_active(hci_connection)) return; 428 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 429 log_info("pairing complete, status %02x", status); 430 431 uint8_t event[12]; 432 event[0] = GAP_EVENT_PAIRING_COMPLETE; 433 event[1] = 9; 434 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 435 reverse_bd_addr(hci_connection->address, &event[4]); 436 event[10] = status; 437 hci_emit_event(event, sizeof(event), 1); 438 } 439 440 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 441 hci_connection_t * conn = hci_connection_for_handle(handle); 442 if (!conn) return 0; 443 return (int) hci_pairing_active(conn); 444 } 445 446 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 447 if (!hci_stack->link_key_db) return; 448 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 449 hci_stack->link_key_db->delete_link_key(addr); 450 } 451 452 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 453 if (!hci_stack->link_key_db) return; 454 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 455 hci_stack->link_key_db->put_link_key(addr, link_key, type); 456 } 457 458 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 459 if (!hci_stack->link_key_db) return false; 460 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 461 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 462 return result; 463 } 464 465 void gap_delete_all_link_keys(void){ 466 bd_addr_t addr; 467 link_key_t link_key; 468 link_key_type_t type; 469 btstack_link_key_iterator_t it; 470 int ok = gap_link_key_iterator_init(&it); 471 if (!ok) { 472 log_error("could not initialize iterator"); 473 return; 474 } 475 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 476 gap_drop_link_key_for_bd_addr(addr); 477 } 478 gap_link_key_iterator_done(&it); 479 } 480 481 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 482 if (!hci_stack->link_key_db) return 0; 483 if (!hci_stack->link_key_db->iterator_init) return 0; 484 return hci_stack->link_key_db->iterator_init(it); 485 } 486 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){ 487 if (!hci_stack->link_key_db) return 0; 488 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 489 } 490 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 491 if (!hci_stack->link_key_db) return; 492 hci_stack->link_key_db->iterator_done(it); 493 } 494 #endif 495 496 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 497 switch (address_type){ 498 case BD_ADDR_TYPE_LE_PUBLIC: 499 case BD_ADDR_TYPE_LE_RANDOM: 500 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 501 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 502 return true; 503 default: 504 return false; 505 } 506 } 507 508 static int hci_is_le_connection(hci_connection_t * connection){ 509 return hci_is_le_connection_type(connection->address_type); 510 } 511 512 /** 513 * count connections 514 */ 515 static int nr_hci_connections(void){ 516 int count = 0; 517 btstack_linked_item_t *it; 518 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 519 count++; 520 } 521 return count; 522 } 523 524 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 525 526 unsigned int num_packets_sent_classic = 0; 527 unsigned int num_packets_sent_le = 0; 528 529 btstack_linked_item_t *it; 530 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 531 hci_connection_t * connection = (hci_connection_t *) it; 532 if (hci_is_le_connection(connection)){ 533 num_packets_sent_le += connection->num_packets_sent; 534 } 535 if (connection->address_type == BD_ADDR_TYPE_ACL){ 536 num_packets_sent_classic += connection->num_packets_sent; 537 } 538 } 539 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 540 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 541 int free_slots_le = 0; 542 543 if (free_slots_classic < 0){ 544 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); 545 return 0; 546 } 547 548 if (hci_stack->le_acl_packets_total_num){ 549 // if we have LE slots, they are used 550 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 551 if (free_slots_le < 0){ 552 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); 553 return 0; 554 } 555 } else { 556 // otherwise, classic slots are used for LE, too 557 free_slots_classic -= num_packets_sent_le; 558 if (free_slots_classic < 0){ 559 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); 560 return 0; 561 } 562 } 563 564 switch (address_type){ 565 case BD_ADDR_TYPE_UNKNOWN: 566 log_error("hci_number_free_acl_slots: unknown address type"); 567 return 0; 568 569 case BD_ADDR_TYPE_ACL: 570 return free_slots_classic; 571 572 default: 573 if (hci_stack->le_acl_packets_total_num){ 574 return free_slots_le; 575 } 576 return free_slots_classic; 577 } 578 } 579 580 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 581 // get connection type 582 hci_connection_t * connection = hci_connection_for_handle(con_handle); 583 if (!connection){ 584 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 585 return 0; 586 } 587 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 588 } 589 590 #ifdef ENABLE_CLASSIC 591 static int hci_number_free_sco_slots(void){ 592 unsigned int num_sco_packets_sent = 0; 593 btstack_linked_item_t *it; 594 if (hci_stack->synchronous_flow_control_enabled){ 595 // explicit flow control 596 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 597 hci_connection_t * connection = (hci_connection_t *) it; 598 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 599 num_sco_packets_sent += connection->num_packets_sent; 600 } 601 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 602 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 603 return 0; 604 } 605 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 606 } else { 607 // implicit flow control -- TODO 608 int num_ready = 0; 609 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 610 hci_connection_t * connection = (hci_connection_t *) it; 611 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 612 if (connection->sco_tx_ready == 0) continue; 613 num_ready++; 614 } 615 return num_ready; 616 } 617 } 618 #endif 619 620 // only used to send HCI Host Number Completed Packets 621 static int hci_can_send_comand_packet_transport(void){ 622 if (hci_stack->hci_packet_buffer_reserved) return 0; 623 624 // check for async hci transport implementations 625 if (hci_stack->hci_transport->can_send_packet_now){ 626 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 627 return 0; 628 } 629 } 630 return 1; 631 } 632 633 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 634 int hci_can_send_command_packet_now(void){ 635 if (hci_can_send_comand_packet_transport() == 0) return 0; 636 return hci_stack->num_cmd_packets > 0u; 637 } 638 639 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 640 // check for async hci transport implementations 641 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 642 return hci_stack->hci_transport->can_send_packet_now(packet_type); 643 } 644 645 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 646 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 647 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 648 } 649 650 int hci_can_send_acl_le_packet_now(void){ 651 if (hci_stack->hci_packet_buffer_reserved) return 0; 652 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 653 } 654 655 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 656 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 657 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 658 } 659 660 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 661 if (hci_stack->hci_packet_buffer_reserved) return 0; 662 return hci_can_send_prepared_acl_packet_now(con_handle); 663 } 664 665 #ifdef ENABLE_CLASSIC 666 int hci_can_send_acl_classic_packet_now(void){ 667 if (hci_stack->hci_packet_buffer_reserved) return 0; 668 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 669 } 670 671 int hci_can_send_prepared_sco_packet_now(void){ 672 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 673 if (hci_have_usb_transport()){ 674 return hci_stack->sco_can_send_now; 675 } else { 676 return hci_number_free_sco_slots() > 0; 677 } 678 } 679 680 int hci_can_send_sco_packet_now(void){ 681 if (hci_stack->hci_packet_buffer_reserved) return 0; 682 return hci_can_send_prepared_sco_packet_now(); 683 } 684 685 void hci_request_sco_can_send_now_event(void){ 686 hci_stack->sco_waiting_for_can_send_now = 1; 687 hci_notify_if_sco_can_send_now(); 688 } 689 #endif 690 691 // used for internal checks in l2cap.c 692 int hci_is_packet_buffer_reserved(void){ 693 return hci_stack->hci_packet_buffer_reserved; 694 } 695 696 // reserves outgoing packet buffer. @returns 1 if successful 697 int hci_reserve_packet_buffer(void){ 698 if (hci_stack->hci_packet_buffer_reserved) { 699 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 700 return 0; 701 } 702 hci_stack->hci_packet_buffer_reserved = 1; 703 return 1; 704 } 705 706 void hci_release_packet_buffer(void){ 707 hci_stack->hci_packet_buffer_reserved = 0; 708 } 709 710 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 711 static int hci_transport_synchronous(void){ 712 return hci_stack->hci_transport->can_send_packet_now == NULL; 713 } 714 715 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 716 717 // 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); 718 719 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 720 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 721 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 722 max_acl_data_packet_length = hci_stack->le_data_packets_length; 723 } 724 725 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 726 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 727 max_acl_data_packet_length = connection->le_max_tx_octets; 728 } 729 #endif 730 731 log_debug("hci_send_acl_packet_fragments entered"); 732 733 int err; 734 // multiple packets could be send on a synchronous HCI transport 735 while (true){ 736 737 log_debug("hci_send_acl_packet_fragments loop entered"); 738 739 // get current data 740 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 741 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 742 bool more_fragments = false; 743 744 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 745 if (current_acl_data_packet_length > max_acl_data_packet_length){ 746 more_fragments = true; 747 current_acl_data_packet_length = max_acl_data_packet_length; 748 } 749 750 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 751 if (acl_header_pos > 0u){ 752 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 753 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 754 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 755 } 756 757 // update header len 758 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 759 760 // count packet 761 connection->num_packets_sent++; 762 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 763 764 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 765 if (more_fragments){ 766 // update start of next fragment to send 767 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 768 } else { 769 // done 770 hci_stack->acl_fragmentation_pos = 0; 771 hci_stack->acl_fragmentation_total_size = 0; 772 } 773 774 // send packet 775 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 776 const int size = current_acl_data_packet_length + 4; 777 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 778 hci_stack->acl_fragmentation_tx_active = 1; 779 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 780 781 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 782 783 // done yet? 784 if (!more_fragments) break; 785 786 // can send more? 787 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 788 } 789 790 log_debug("hci_send_acl_packet_fragments loop over"); 791 792 // release buffer now for synchronous transport 793 if (hci_transport_synchronous()){ 794 hci_stack->acl_fragmentation_tx_active = 0; 795 hci_release_packet_buffer(); 796 hci_emit_transport_packet_sent(); 797 } 798 799 return err; 800 } 801 802 // pre: caller has reserved the packet buffer 803 int hci_send_acl_packet_buffer(int size){ 804 805 // log_info("hci_send_acl_packet_buffer size %u", size); 806 807 if (!hci_stack->hci_packet_buffer_reserved) { 808 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 809 return 0; 810 } 811 812 uint8_t * packet = hci_stack->hci_packet_buffer; 813 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 814 815 // check for free places on Bluetooth module 816 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 817 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 818 hci_release_packet_buffer(); 819 hci_emit_transport_packet_sent(); 820 return BTSTACK_ACL_BUFFERS_FULL; 821 } 822 823 hci_connection_t *connection = hci_connection_for_handle( con_handle); 824 if (!connection) { 825 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 826 hci_release_packet_buffer(); 827 hci_emit_transport_packet_sent(); 828 return 0; 829 } 830 831 #ifdef ENABLE_CLASSIC 832 hci_connection_timestamp(connection); 833 #endif 834 835 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 836 837 // setup data 838 hci_stack->acl_fragmentation_total_size = size; 839 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 840 841 return hci_send_acl_packet_fragments(connection); 842 } 843 844 #ifdef ENABLE_CLASSIC 845 // pre: caller has reserved the packet buffer 846 int hci_send_sco_packet_buffer(int size){ 847 848 // log_info("hci_send_acl_packet_buffer size %u", size); 849 850 if (!hci_stack->hci_packet_buffer_reserved) { 851 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 852 return 0; 853 } 854 855 uint8_t * packet = hci_stack->hci_packet_buffer; 856 857 // skip checks in loopback mode 858 if (!hci_stack->loopback_mode){ 859 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 860 861 // check for free places on Bluetooth module 862 if (!hci_can_send_prepared_sco_packet_now()) { 863 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 864 hci_release_packet_buffer(); 865 hci_emit_transport_packet_sent(); 866 return BTSTACK_ACL_BUFFERS_FULL; 867 } 868 869 // track send packet in connection struct 870 hci_connection_t *connection = hci_connection_for_handle( con_handle); 871 if (!connection) { 872 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 873 hci_release_packet_buffer(); 874 hci_emit_transport_packet_sent(); 875 return 0; 876 } 877 878 if (hci_have_usb_transport()){ 879 // token used 880 hci_stack->sco_can_send_now = 0; 881 } else { 882 if (hci_stack->synchronous_flow_control_enabled){ 883 connection->num_packets_sent++; 884 } else { 885 connection->sco_tx_ready--; 886 } 887 } 888 } 889 890 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 891 892 #ifdef HAVE_SCO_TRANSPORT 893 hci_stack->sco_transport->send_packet(packet, size); 894 hci_release_packet_buffer(); 895 hci_emit_transport_packet_sent(); 896 897 return 0; 898 #else 899 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 900 if (hci_transport_synchronous()){ 901 hci_release_packet_buffer(); 902 hci_emit_transport_packet_sent(); 903 } 904 905 return err; 906 #endif 907 } 908 #endif 909 910 static void acl_handler(uint8_t *packet, uint16_t size){ 911 912 // get info 913 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 914 hci_connection_t *conn = hci_connection_for_handle(con_handle); 915 uint8_t acl_flags = READ_ACL_FLAGS(packet); 916 uint16_t acl_length = READ_ACL_LENGTH(packet); 917 918 // ignore non-registered handle 919 if (!conn){ 920 log_error("acl_handler called with non-registered handle %u!" , con_handle); 921 return; 922 } 923 924 // assert packet is complete 925 if ((acl_length + 4u) != size){ 926 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 927 return; 928 } 929 930 #ifdef ENABLE_CLASSIC 931 // update idle timestamp 932 hci_connection_timestamp(conn); 933 #endif 934 935 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 936 hci_stack->host_completed_packets = 1; 937 conn->num_packets_completed++; 938 #endif 939 940 // handle different packet types 941 switch (acl_flags & 0x03u) { 942 943 case 0x01: // continuation fragment 944 945 // sanity checks 946 if (conn->acl_recombination_pos == 0u) { 947 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 948 return; 949 } 950 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 951 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 952 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 953 conn->acl_recombination_pos = 0; 954 return; 955 } 956 957 // append fragment payload (header already stored) 958 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 959 &packet[4], acl_length); 960 conn->acl_recombination_pos += acl_length; 961 962 // forward complete L2CAP packet if complete. 963 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 964 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 965 // reset recombination buffer 966 conn->acl_recombination_length = 0; 967 conn->acl_recombination_pos = 0; 968 } 969 break; 970 971 case 0x02: { // first fragment 972 973 // sanity check 974 if (conn->acl_recombination_pos) { 975 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 976 conn->acl_recombination_pos = 0; 977 } 978 979 // peek into L2CAP packet! 980 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 981 982 // compare fragment size to L2CAP packet size 983 if (acl_length >= (l2cap_length + 4u)){ 984 // forward fragment as L2CAP packet 985 hci_emit_acl_packet(packet, acl_length + 4u); 986 } else { 987 988 if (acl_length > HCI_ACL_BUFFER_SIZE){ 989 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 990 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 991 return; 992 } 993 994 // store first fragment and tweak acl length for complete package 995 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 996 packet, acl_length + 4u); 997 conn->acl_recombination_pos = acl_length + 4u; 998 conn->acl_recombination_length = l2cap_length; 999 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1000 } 1001 break; 1002 1003 } 1004 default: 1005 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1006 return; 1007 } 1008 1009 // execute main loop 1010 hci_run(); 1011 } 1012 1013 static void hci_shutdown_connection(hci_connection_t *conn){ 1014 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1015 1016 #ifdef ENABLE_CLASSIC 1017 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1018 bd_addr_type_t addr_type = conn->address_type; 1019 #endif 1020 #ifdef HAVE_SCO_TRANSPORT 1021 hci_con_handle_t con_handle = conn->con_handle; 1022 #endif 1023 #endif 1024 1025 btstack_run_loop_remove_timer(&conn->timeout); 1026 1027 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1028 btstack_memory_hci_connection_free( conn ); 1029 1030 // now it's gone 1031 hci_emit_nr_connections_changed(); 1032 1033 #ifdef ENABLE_CLASSIC 1034 #ifdef ENABLE_SCO_OVER_HCI 1035 // update SCO 1036 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1037 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1038 } 1039 #endif 1040 #ifdef HAVE_SCO_TRANSPORT 1041 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1042 hci_stack->sco_transport->close(con_handle); 1043 } 1044 #endif 1045 #endif 1046 } 1047 1048 #ifdef ENABLE_CLASSIC 1049 1050 static const uint16_t packet_type_sizes[] = { 1051 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1052 HCI_ACL_DH1_SIZE, 0, 0, 0, 1053 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1054 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1055 }; 1056 static const uint8_t packet_type_feature_requirement_bit[] = { 1057 0, // 3 slot packets 1058 1, // 5 slot packets 1059 25, // EDR 2 mpbs 1060 26, // EDR 3 mbps 1061 39, // 3 slot EDR packts 1062 40, // 5 slot EDR packet 1063 }; 1064 static const uint16_t packet_type_feature_packet_mask[] = { 1065 0x0f00, // 3 slot packets 1066 0xf000, // 5 slot packets 1067 0x1102, // EDR 2 mpbs 1068 0x2204, // EDR 3 mbps 1069 0x0300, // 3 slot EDR packts 1070 0x3000, // 5 slot EDR packet 1071 }; 1072 1073 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1074 // enable packet types based on size 1075 uint16_t packet_types = 0; 1076 unsigned int i; 1077 for (i=0;i<16;i++){ 1078 if (packet_type_sizes[i] == 0) continue; 1079 if (packet_type_sizes[i] <= buffer_size){ 1080 packet_types |= 1 << i; 1081 } 1082 } 1083 // disable packet types due to missing local supported features 1084 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1085 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1086 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1087 if (feature_set) continue; 1088 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1089 packet_types &= ~packet_type_feature_packet_mask[i]; 1090 } 1091 // flip bits for "may not be used" 1092 packet_types ^= 0x3306; 1093 return packet_types; 1094 } 1095 1096 uint16_t hci_usable_acl_packet_types(void){ 1097 return hci_stack->packet_types; 1098 } 1099 #endif 1100 1101 uint8_t* hci_get_outgoing_packet_buffer(void){ 1102 // hci packet buffer is >= acl data packet length 1103 return hci_stack->hci_packet_buffer; 1104 } 1105 1106 uint16_t hci_max_acl_data_packet_length(void){ 1107 return hci_stack->acl_data_packet_length; 1108 } 1109 1110 #ifdef ENABLE_CLASSIC 1111 int hci_extended_sco_link_supported(void){ 1112 // No. 31, byte 3, bit 7 1113 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1114 } 1115 #endif 1116 1117 int hci_non_flushable_packet_boundary_flag_supported(void){ 1118 // No. 54, byte 6, bit 6 1119 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1120 } 1121 1122 static int gap_ssp_supported(void){ 1123 // No. 51, byte 6, bit 3 1124 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1125 } 1126 1127 static int hci_classic_supported(void){ 1128 #ifdef ENABLE_CLASSIC 1129 // No. 37, byte 4, bit 5, = No BR/EDR Support 1130 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1131 #else 1132 return 0; 1133 #endif 1134 } 1135 1136 static int hci_le_supported(void){ 1137 #ifdef ENABLE_BLE 1138 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1139 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1140 #else 1141 return 0; 1142 #endif 1143 } 1144 1145 #ifdef ENABLE_BLE 1146 1147 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1148 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1149 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1150 } else { 1151 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1152 } 1153 } 1154 1155 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1156 *addr_type = hci_stack->le_own_addr_type; 1157 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1158 } 1159 1160 #ifdef ENABLE_LE_PERIPHERAL 1161 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1162 *addr_type = hci_stack->le_advertisements_own_addr_type; 1163 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1164 }; 1165 #endif 1166 1167 #ifdef ENABLE_LE_CENTRAL 1168 1169 /** 1170 * @brief Get own addr type and address used for LE connections (Central) 1171 */ 1172 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1173 *addr_type = hci_stack->le_connection_own_addr_type; 1174 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1175 } 1176 1177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1178 1179 int offset = 3; 1180 int num_reports = packet[offset]; 1181 offset += 1; 1182 1183 int i; 1184 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1185 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1186 for (i=0; (i<num_reports) && (offset < size);i++){ 1187 // sanity checks on data_length: 1188 uint8_t data_length = packet[offset + 8]; 1189 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1190 if ((offset + 9u + data_length + 1u) > size) return; 1191 // setup event 1192 uint8_t event_size = 10u + data_length; 1193 int pos = 0; 1194 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1195 event[pos++] = event_size; 1196 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1197 offset += 8; 1198 pos += 8; 1199 event[pos++] = packet[offset + 1 + data_length]; // rssi 1200 event[pos++] = data_length; 1201 offset++; 1202 (void)memcpy(&event[pos], &packet[offset], data_length); 1203 pos += data_length; 1204 offset += data_length + 1u; // rssi 1205 hci_emit_event(event, pos, 1); 1206 } 1207 } 1208 #endif 1209 #endif 1210 1211 #ifdef ENABLE_BLE 1212 #ifdef ENABLE_LE_PERIPHERAL 1213 static void hci_update_advertisements_enabled_for_current_roles(void){ 1214 if (hci_stack->le_advertisements_enabled){ 1215 // get number of active le slave connections 1216 int num_slave_connections = 0; 1217 btstack_linked_list_iterator_t it; 1218 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1219 while (btstack_linked_list_iterator_has_next(&it)){ 1220 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1221 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1222 if (con->state != OPEN) continue; 1223 if (con->role != HCI_ROLE_SLAVE) continue; 1224 if (!hci_is_le_connection(con)) continue; 1225 num_slave_connections++; 1226 } 1227 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1228 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1229 } else { 1230 hci_stack->le_advertisements_enabled_for_current_roles = false; 1231 } 1232 } 1233 #endif 1234 #endif 1235 1236 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1237 1238 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1239 if (!hci_stack->config) return 0; 1240 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1241 // Limit baud rate for Broadcom chipsets to 3 mbps 1242 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1243 baud_rate = 3000000; 1244 } 1245 return baud_rate; 1246 } 1247 1248 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1249 UNUSED(ds); 1250 1251 switch (hci_stack->substate){ 1252 case HCI_INIT_W4_SEND_RESET: 1253 log_info("Resend HCI Reset"); 1254 hci_stack->substate = HCI_INIT_SEND_RESET; 1255 hci_stack->num_cmd_packets = 1; 1256 hci_run(); 1257 break; 1258 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1259 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1260 if (hci_stack->hci_transport->reset_link){ 1261 hci_stack->hci_transport->reset_link(); 1262 } 1263 1264 /* fall through */ 1265 1266 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1267 log_info("Resend HCI Reset - CSR Warm Boot"); 1268 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1269 hci_stack->num_cmd_packets = 1; 1270 hci_run(); 1271 break; 1272 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1273 if (hci_stack->hci_transport->set_baudrate){ 1274 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1275 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1276 hci_stack->hci_transport->set_baudrate(baud_rate); 1277 } 1278 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1279 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1280 if (hci_stack->hci_transport->reset_link){ 1281 log_info("Link Reset"); 1282 hci_stack->hci_transport->reset_link(); 1283 } 1284 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1285 hci_run(); 1286 } 1287 break; 1288 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1289 // otherwise continue 1290 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1291 hci_send_cmd(&hci_read_local_supported_commands); 1292 break; 1293 default: 1294 break; 1295 } 1296 } 1297 #endif 1298 1299 static void hci_initializing_next_state(void){ 1300 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1301 } 1302 1303 // assumption: hci_can_send_command_packet_now() == true 1304 static void hci_initializing_run(void){ 1305 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1306 switch (hci_stack->substate){ 1307 case HCI_INIT_SEND_RESET: 1308 hci_state_reset(); 1309 1310 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1311 // prepare reset if command complete not received in 100ms 1312 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1313 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1314 btstack_run_loop_add_timer(&hci_stack->timeout); 1315 #endif 1316 // send command 1317 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1318 hci_send_cmd(&hci_reset); 1319 break; 1320 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1321 hci_send_cmd(&hci_read_local_version_information); 1322 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1323 break; 1324 case HCI_INIT_SEND_READ_LOCAL_NAME: 1325 hci_send_cmd(&hci_read_local_name); 1326 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1327 break; 1328 1329 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1330 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1331 hci_state_reset(); 1332 // prepare reset if command complete not received in 100ms 1333 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1334 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1335 btstack_run_loop_add_timer(&hci_stack->timeout); 1336 // send command 1337 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1338 hci_send_cmd(&hci_reset); 1339 break; 1340 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1341 hci_state_reset(); 1342 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1343 hci_send_cmd(&hci_reset); 1344 break; 1345 case HCI_INIT_SEND_BAUD_CHANGE: { 1346 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1347 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1348 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1349 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1350 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1351 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1352 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1353 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1354 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1355 btstack_run_loop_add_timer(&hci_stack->timeout); 1356 } 1357 break; 1358 } 1359 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1360 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1361 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1362 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1363 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1364 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1365 break; 1366 } 1367 case HCI_INIT_CUSTOM_INIT: 1368 // Custom initialization 1369 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1370 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1371 bool send_cmd = false; 1372 switch (hci_stack->chipset_result){ 1373 case BTSTACK_CHIPSET_VALID_COMMAND: 1374 send_cmd = true; 1375 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1376 break; 1377 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1378 send_cmd = true; 1379 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1380 log_info("CSR Warm Boot"); 1381 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1382 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1383 btstack_run_loop_add_timer(&hci_stack->timeout); 1384 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1385 && hci_stack->config 1386 && hci_stack->chipset 1387 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1388 && hci_stack->hci_transport->set_baudrate 1389 && hci_transport_uart_get_main_baud_rate()){ 1390 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1391 } else { 1392 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1393 } 1394 break; 1395 default: 1396 break; 1397 } 1398 1399 if (send_cmd){ 1400 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1401 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1402 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1403 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1404 break; 1405 } 1406 log_info("Init script done"); 1407 1408 // Init script download on Broadcom chipsets causes: 1409 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1410 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1411 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1412 1413 // - baud rate to reset, restore UART baud rate if needed 1414 int need_baud_change = hci_stack->config 1415 && hci_stack->chipset 1416 && hci_stack->chipset->set_baudrate_command 1417 && hci_stack->hci_transport->set_baudrate 1418 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1419 if (need_baud_change) { 1420 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1421 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1422 hci_stack->hci_transport->set_baudrate(baud_rate); 1423 } 1424 1425 uint16_t bcm_delay_ms = 300; 1426 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1427 // -> Work around: wait here. 1428 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1429 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1430 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1431 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1432 btstack_run_loop_add_timer(&hci_stack->timeout); 1433 break; 1434 } 1435 } 1436 // otherwise continue 1437 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1438 hci_send_cmd(&hci_read_local_supported_commands); 1439 break; 1440 case HCI_INIT_SET_BD_ADDR: 1441 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1442 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1443 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1444 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1445 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1446 break; 1447 #endif 1448 1449 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1450 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1451 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1452 hci_send_cmd(&hci_read_local_supported_commands); 1453 break; 1454 case HCI_INIT_READ_BD_ADDR: 1455 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1456 hci_send_cmd(&hci_read_bd_addr); 1457 break; 1458 case HCI_INIT_READ_BUFFER_SIZE: 1459 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1460 hci_send_cmd(&hci_read_buffer_size); 1461 break; 1462 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1463 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1464 hci_send_cmd(&hci_read_local_supported_features); 1465 break; 1466 1467 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1468 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1469 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1470 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1471 break; 1472 case HCI_INIT_HOST_BUFFER_SIZE: 1473 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1474 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1475 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1476 break; 1477 #endif 1478 1479 case HCI_INIT_SET_EVENT_MASK: 1480 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1481 if (hci_le_supported()){ 1482 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1483 } else { 1484 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1485 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1486 } 1487 break; 1488 1489 #ifdef ENABLE_CLASSIC 1490 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1491 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1492 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1493 break; 1494 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1495 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1496 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1497 break; 1498 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1499 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1500 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1501 break; 1502 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1503 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1504 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1505 break; 1506 case HCI_INIT_WRITE_LOCAL_NAME: { 1507 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1508 hci_reserve_packet_buffer(); 1509 uint8_t * packet = hci_stack->hci_packet_buffer; 1510 // construct HCI Command and send 1511 uint16_t opcode = hci_write_local_name.opcode; 1512 hci_stack->last_cmd_opcode = opcode; 1513 packet[0] = opcode & 0xff; 1514 packet[1] = opcode >> 8; 1515 packet[2] = DEVICE_NAME_LEN; 1516 memset(&packet[3], 0, DEVICE_NAME_LEN); 1517 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1518 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1519 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1520 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1521 // expand '00:00:00:00:00:00' in name with bd_addr 1522 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1523 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1524 break; 1525 } 1526 case HCI_INIT_WRITE_EIR_DATA: { 1527 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1528 hci_reserve_packet_buffer(); 1529 uint8_t * packet = hci_stack->hci_packet_buffer; 1530 // construct HCI Command in-place and send 1531 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1532 hci_stack->last_cmd_opcode = opcode; 1533 uint16_t offset = 0; 1534 packet[offset++] = opcode & 0xff; 1535 packet[offset++] = opcode >> 8; 1536 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1537 packet[offset++] = 0; // FEC not required 1538 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1539 if (hci_stack->eir_data){ 1540 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1541 ad_context_t context; 1542 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1543 uint8_t data_type = ad_iterator_get_data_type(&context); 1544 uint8_t size = ad_iterator_get_data_len(&context); 1545 const uint8_t *data = ad_iterator_get_data(&context); 1546 // copy item 1547 packet[offset++] = size + 1; 1548 packet[offset++] = data_type; 1549 memcpy(&packet[offset], data, size); 1550 // update name item 1551 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1552 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1553 } 1554 offset += size; 1555 } 1556 } else { 1557 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1558 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1559 packet[offset++] = bytes_to_copy + 1; 1560 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1561 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1562 // expand '00:00:00:00:00:00' in name with bd_addr 1563 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1564 } 1565 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1566 break; 1567 } 1568 case HCI_INIT_WRITE_INQUIRY_MODE: 1569 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1570 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1571 break; 1572 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1573 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1574 hci_stack->secure_connections_active = true; 1575 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1576 break; 1577 case HCI_INIT_WRITE_SCAN_ENABLE: 1578 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1579 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1580 break; 1581 // only sent if ENABLE_SCO_OVER_HCI is defined 1582 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1583 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1584 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1585 break; 1586 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1587 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1588 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1589 break; 1590 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1591 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1592 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1593 #ifdef ENABLE_SCO_OVER_HCI 1594 log_info("BCM: Route SCO data via HCI transport"); 1595 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1596 #endif 1597 #ifdef ENABLE_SCO_OVER_PCM 1598 log_info("BCM: Route SCO data via PCM interface"); 1599 #ifdef ENABLE_BCM_PCM_WBS 1600 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1601 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1602 #else 1603 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1604 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1605 #endif 1606 #endif 1607 break; 1608 #ifdef ENABLE_SCO_OVER_PCM 1609 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1610 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1611 log_info("BCM: Config PCM interface for I2S"); 1612 #ifdef ENABLE_BCM_PCM_WBS 1613 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1614 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1615 #else 1616 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1617 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1618 #endif 1619 break; 1620 #endif 1621 #endif 1622 1623 #ifdef ENABLE_BLE 1624 // LE INIT 1625 case HCI_INIT_LE_READ_BUFFER_SIZE: 1626 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1627 hci_send_cmd(&hci_le_read_buffer_size); 1628 break; 1629 case HCI_INIT_LE_SET_EVENT_MASK: 1630 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1631 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1632 break; 1633 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1634 // LE Supported Host = 1, Simultaneous Host = 0 1635 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1636 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1637 break; 1638 #endif 1639 1640 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1641 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1642 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1643 hci_send_cmd(&hci_le_read_maximum_data_length); 1644 break; 1645 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1646 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1647 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1648 break; 1649 #endif 1650 1651 #ifdef ENABLE_LE_CENTRAL 1652 case HCI_INIT_READ_WHITE_LIST_SIZE: 1653 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1654 hci_send_cmd(&hci_le_read_white_list_size); 1655 break; 1656 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1657 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1658 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); 1659 break; 1660 #endif 1661 default: 1662 return; 1663 } 1664 } 1665 1666 static void hci_init_done(void){ 1667 // done. tell the app 1668 log_info("hci_init_done -> HCI_STATE_WORKING"); 1669 hci_stack->state = HCI_STATE_WORKING; 1670 hci_emit_state(); 1671 hci_run(); 1672 } 1673 1674 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1675 bool command_completed = false; 1676 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1677 uint16_t opcode = little_endian_read_16(packet,3); 1678 if (opcode == hci_stack->last_cmd_opcode){ 1679 command_completed = true; 1680 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1681 } else { 1682 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1683 } 1684 } 1685 1686 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1687 uint8_t status = packet[2]; 1688 uint16_t opcode = little_endian_read_16(packet,4); 1689 if (opcode == hci_stack->last_cmd_opcode){ 1690 if (status){ 1691 command_completed = true; 1692 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1693 } else { 1694 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1695 } 1696 } else { 1697 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1698 } 1699 } 1700 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1701 // Vendor == CSR 1702 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1703 // TODO: track actual command 1704 command_completed = true; 1705 } 1706 1707 // Vendor == Toshiba 1708 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1709 // TODO: track actual command 1710 command_completed = true; 1711 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1712 hci_stack->num_cmd_packets = 1; 1713 } 1714 #endif 1715 1716 return command_completed; 1717 } 1718 1719 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1720 1721 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1722 1723 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1724 1725 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1726 1727 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1728 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1729 // 1730 // HCI Reset 1731 // Timeout 100 ms 1732 // HCI Reset 1733 // Command Complete Reset 1734 // HCI Read Local Version Information 1735 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1736 // hang... 1737 // 1738 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1739 if (!command_completed 1740 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1741 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1742 1743 uint16_t opcode = little_endian_read_16(packet,3); 1744 if (opcode == hci_reset.opcode){ 1745 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1746 return; 1747 } 1748 } 1749 1750 // CSR & H5 1751 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1752 if (!command_completed 1753 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1754 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1755 1756 uint16_t opcode = little_endian_read_16(packet,3); 1757 if (opcode == hci_reset.opcode){ 1758 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1759 return; 1760 } 1761 } 1762 1763 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1764 // fix: Correct substate and behave as command below 1765 if (command_completed){ 1766 switch (hci_stack->substate){ 1767 case HCI_INIT_SEND_RESET: 1768 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1769 break; 1770 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1771 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1772 break; 1773 default: 1774 break; 1775 } 1776 } 1777 1778 #endif 1779 1780 if (!command_completed) return; 1781 1782 bool need_baud_change = false; 1783 bool need_addr_change = false; 1784 1785 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1786 need_baud_change = hci_stack->config 1787 && hci_stack->chipset 1788 && hci_stack->chipset->set_baudrate_command 1789 && hci_stack->hci_transport->set_baudrate 1790 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1791 1792 need_addr_change = hci_stack->custom_bd_addr_set 1793 && hci_stack->chipset 1794 && hci_stack->chipset->set_bd_addr_command; 1795 #endif 1796 1797 switch(hci_stack->substate){ 1798 1799 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1800 case HCI_INIT_SEND_RESET: 1801 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1802 // fix: just correct substate and behave as command below 1803 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1804 btstack_run_loop_remove_timer(&hci_stack->timeout); 1805 break; 1806 case HCI_INIT_W4_SEND_RESET: 1807 btstack_run_loop_remove_timer(&hci_stack->timeout); 1808 break; 1809 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1810 log_info("Received local name, need baud change %d", (int) need_baud_change); 1811 if (need_baud_change){ 1812 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1813 return; 1814 } 1815 // skip baud change 1816 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1817 return; 1818 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1819 // for STLC2500D, baud rate change already happened. 1820 // for others, baud rate gets changed now 1821 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1822 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1823 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1824 hci_stack->hci_transport->set_baudrate(baud_rate); 1825 } 1826 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1827 return; 1828 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1829 btstack_run_loop_remove_timer(&hci_stack->timeout); 1830 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1831 return; 1832 case HCI_INIT_W4_CUSTOM_INIT: 1833 // repeat custom init 1834 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1835 return; 1836 #else 1837 case HCI_INIT_W4_SEND_RESET: 1838 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1839 return ; 1840 #endif 1841 1842 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1843 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1844 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1845 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1846 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1847 return; 1848 } 1849 if (need_addr_change){ 1850 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1851 return; 1852 } 1853 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1854 return; 1855 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1856 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1857 if (need_baud_change){ 1858 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1859 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1860 hci_stack->hci_transport->set_baudrate(baud_rate); 1861 } 1862 if (need_addr_change){ 1863 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1864 return; 1865 } 1866 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1867 return; 1868 case HCI_INIT_W4_SET_BD_ADDR: 1869 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1870 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1871 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1872 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1873 return; 1874 } 1875 // skipping st warm boot 1876 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1877 return; 1878 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1879 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1880 return; 1881 #endif 1882 case HCI_INIT_W4_READ_BD_ADDR: 1883 // only read buffer size if supported 1884 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1885 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1886 return; 1887 } 1888 // skipping read buffer size 1889 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1890 return; 1891 case HCI_INIT_W4_SET_EVENT_MASK: 1892 // skip Classic init commands for LE only chipsets 1893 if (!hci_classic_supported()){ 1894 #ifdef ENABLE_BLE 1895 if (hci_le_supported()){ 1896 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1897 return; 1898 } 1899 #endif 1900 log_error("Neither BR/EDR nor LE supported"); 1901 hci_init_done(); 1902 return; 1903 } 1904 if (!gap_ssp_supported()){ 1905 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1906 return; 1907 } 1908 break; 1909 #ifdef ENABLE_BLE 1910 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1911 // skip write le host if not supported (e.g. on LE only EM9301) 1912 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1913 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1914 return; 1915 1916 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1917 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1918 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1919 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1920 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1921 return; 1922 } 1923 // explicit fall through to reduce repetitions 1924 1925 #ifdef ENABLE_LE_CENTRAL 1926 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1927 #else 1928 hci_init_done(); 1929 #endif 1930 return; 1931 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1932 1933 #endif /* ENABLE_BLE */ 1934 1935 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1936 // skip write secure connections host support if not supported or disabled 1937 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1938 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1939 return; 1940 } 1941 break; 1942 1943 #ifdef ENABLE_SCO_OVER_HCI 1944 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1945 // skip write synchronous flow control if not supported 1946 if (hci_stack->local_supported_commands[0] & 0x04) break; 1947 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1948 1949 /* fall through */ 1950 1951 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1952 // skip write default erroneous data reporting if not supported 1953 if (hci_stack->local_supported_commands[0] & 0x08) break; 1954 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1955 1956 /* fall through */ 1957 1958 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1959 // skip bcm set sco pcm config on non-Broadcom chipsets 1960 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1961 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1962 1963 /* fall through */ 1964 1965 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1966 if (!hci_le_supported()){ 1967 // SKIP LE init for Classic only configuration 1968 hci_init_done(); 1969 return; 1970 } 1971 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1972 break; 1973 1974 #else /* !ENABLE_SCO_OVER_HCI */ 1975 1976 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1977 #ifdef ENABLE_SCO_OVER_PCM 1978 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1979 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1980 return; 1981 } 1982 #endif 1983 /* fall through */ 1984 1985 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1986 #ifdef ENABLE_BLE 1987 if (hci_le_supported()){ 1988 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1989 return; 1990 } 1991 #endif 1992 // SKIP LE init for Classic only configuration 1993 hci_init_done(); 1994 return; 1995 #endif /* ENABLE_SCO_OVER_HCI */ 1996 1997 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1998 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1999 // Response to command before init done state -> init done 2000 case (HCI_INIT_DONE-1): 2001 hci_init_done(); 2002 return; 2003 #endif 2004 2005 default: 2006 break; 2007 } 2008 hci_initializing_next_state(); 2009 } 2010 2011 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2012 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2013 bd_addr_t bd_address; 2014 (void)memcpy(&bd_address, conn->address, 6); 2015 2016 #ifdef ENABLE_CLASSIC 2017 // cache needed data 2018 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2019 #endif 2020 2021 // connection failed, remove entry 2022 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2023 btstack_memory_hci_connection_free( conn ); 2024 2025 #ifdef ENABLE_CLASSIC 2026 // notify client if dedicated bonding 2027 if (notify_dedicated_bonding_failed){ 2028 log_info("hci notify_dedicated_bonding_failed"); 2029 hci_emit_dedicated_bonding_result(bd_address, status); 2030 } 2031 2032 // if authentication error, also delete link key 2033 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2034 gap_drop_link_key_for_bd_addr(bd_address); 2035 } 2036 #else 2037 UNUSED(status); 2038 #endif 2039 } 2040 2041 #ifdef ENABLE_CLASSIC 2042 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2043 // SSP Controller 2044 if (features[6] & (1 << 3)){ 2045 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2046 } 2047 // eSCO 2048 if (features[3] & (1<<7)){ 2049 conn->remote_supported_features[0] |= 1; 2050 } 2051 // Extended features 2052 if (features[7] & (1<<7)){ 2053 conn->remote_supported_features[0] |= 2; 2054 } 2055 } 2056 2057 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2058 // SSP Host 2059 if (features[0] & (1 << 0)){ 2060 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2061 } 2062 // SC Host 2063 if (features[0] & (1 << 3)){ 2064 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2065 } 2066 } 2067 2068 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2069 // SC Controller 2070 if (features[1] & (1 << 0)){ 2071 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2072 } 2073 } 2074 2075 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2076 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2077 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2078 if (conn->bonding_flags & BONDING_DEDICATED){ 2079 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2080 } 2081 } 2082 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2083 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2084 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2085 } 2086 2087 #endif 2088 2089 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2090 // handle BT initialization 2091 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2092 hci_initializing_event_handler(packet, size); 2093 } 2094 2095 // help with BT sleep 2096 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2097 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2098 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2099 hci_initializing_next_state(); 2100 } 2101 } 2102 2103 #ifdef ENABLE_CLASSIC 2104 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2105 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2106 conn->encryption_key_size = encryption_key_size; 2107 2108 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2109 conn->requested_security_level = LEVEL_0; 2110 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2111 return; 2112 } 2113 2114 // Request Authentication if not already done 2115 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2116 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2117 } 2118 #endif 2119 2120 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2121 UNUSED(size); 2122 2123 uint16_t manufacturer; 2124 #ifdef ENABLE_CLASSIC 2125 hci_con_handle_t handle; 2126 hci_connection_t * conn; 2127 uint8_t status; 2128 #endif 2129 // get num cmd packets - limit to 1 to reduce complexity 2130 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2131 2132 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2133 switch (opcode){ 2134 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2135 if (packet[5]) break; 2136 // terminate, name 248 chars 2137 packet[6+248] = 0; 2138 log_info("local name: %s", &packet[6]); 2139 break; 2140 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2141 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2142 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2143 uint16_t acl_len = little_endian_read_16(packet, 6); 2144 uint16_t sco_len = packet[8]; 2145 2146 // determine usable ACL/SCO payload size 2147 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2148 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2149 2150 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2151 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2152 2153 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2154 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2155 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2156 } 2157 break; 2158 case HCI_OPCODE_HCI_READ_RSSI: 2159 if (packet[5] == ERROR_CODE_SUCCESS){ 2160 uint8_t event[5]; 2161 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2162 event[1] = 3; 2163 (void)memcpy(&event[2], &packet[6], 3); 2164 hci_emit_event(event, sizeof(event), 1); 2165 } 2166 break; 2167 #ifdef ENABLE_BLE 2168 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2169 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2170 hci_stack->le_acl_packets_total_num = packet[8]; 2171 // determine usable ACL payload size 2172 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2173 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2174 } 2175 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2176 break; 2177 #endif 2178 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2179 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2180 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2181 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2182 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); 2183 break; 2184 #endif 2185 #ifdef ENABLE_LE_CENTRAL 2186 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2187 hci_stack->le_whitelist_capacity = packet[6]; 2188 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2189 break; 2190 #endif 2191 case HCI_OPCODE_HCI_READ_BD_ADDR: 2192 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2193 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)); 2194 #ifdef ENABLE_CLASSIC 2195 if (hci_stack->link_key_db){ 2196 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2197 } 2198 #endif 2199 break; 2200 #ifdef ENABLE_CLASSIC 2201 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2202 hci_emit_discoverable_enabled(hci_stack->discoverable); 2203 break; 2204 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2205 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2206 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2207 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2208 hci_emit_event(event, sizeof(event), 1); 2209 } 2210 break; 2211 #endif 2212 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2213 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2214 2215 #ifdef ENABLE_CLASSIC 2216 // determine usable ACL packet types based on host buffer size and supported features 2217 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2218 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2219 #endif 2220 // Classic/LE 2221 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2222 break; 2223 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2224 manufacturer = little_endian_read_16(packet, 10); 2225 // map Cypress to Broadcom 2226 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2227 log_info("Treat Cypress as Broadcom"); 2228 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2229 little_endian_store_16(packet, 10, manufacturer); 2230 } 2231 hci_stack->manufacturer = manufacturer; 2232 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2233 break; 2234 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2235 hci_stack->local_supported_commands[0] = 2236 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2237 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2238 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2239 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2240 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2241 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2242 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2243 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2244 hci_stack->local_supported_commands[1] = 2245 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2246 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2247 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2248 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2249 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2250 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2251 break; 2252 #ifdef ENABLE_CLASSIC 2253 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2254 if (packet[5]) return; 2255 hci_stack->synchronous_flow_control_enabled = 1; 2256 break; 2257 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2258 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2259 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2260 conn = hci_connection_for_handle(handle); 2261 if (conn != NULL) { 2262 uint8_t key_size = 0; 2263 if (status == 0){ 2264 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2265 log_info("Handle %04x key Size: %u", handle, key_size); 2266 } else { 2267 key_size = 1; 2268 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2269 } 2270 hci_handle_read_encryption_key_size_complete(conn, key_size); 2271 } 2272 break; 2273 // assert pairing complete event is emitted. 2274 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2275 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2276 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2277 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2278 // lookup connection by gap pairing addr 2279 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2280 if (conn == NULL) break; 2281 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2282 break; 2283 2284 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2285 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2286 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2287 uint8_t event[67]; 2288 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2289 event[1] = 65; 2290 (void)memset(&event[2], 0, 65); 2291 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2292 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2293 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2294 event[2] = 3; 2295 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2296 } else { 2297 event[2] = 1; 2298 } 2299 } 2300 hci_emit_event(event, sizeof(event), 0); 2301 break; 2302 } 2303 #endif 2304 #endif 2305 default: 2306 break; 2307 } 2308 } 2309 2310 #ifdef ENABLE_BLE 2311 static void event_handle_le_connection_complete(const uint8_t * packet){ 2312 bd_addr_t addr; 2313 bd_addr_type_t addr_type; 2314 hci_connection_t * conn; 2315 2316 // Connection management 2317 reverse_bd_addr(&packet[8], addr); 2318 addr_type = (bd_addr_type_t)packet[7]; 2319 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2320 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2321 2322 #ifdef ENABLE_LE_CENTRAL 2323 // handle error: error is reported only to the initiator -> outgoing connection 2324 if (packet[3]){ 2325 2326 // handle cancelled outgoing connection 2327 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2328 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2329 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2330 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2331 // reset state 2332 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2333 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2334 // get outgoing connection conn struct for direct connect 2335 conn = gap_get_outgoing_connection(); 2336 } 2337 2338 // outgoing le connection establishment is done 2339 if (conn){ 2340 // remove entry 2341 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2342 btstack_memory_hci_connection_free( conn ); 2343 } 2344 return; 2345 } 2346 #endif 2347 2348 // on success, both hosts receive connection complete event 2349 if (packet[6] == HCI_ROLE_MASTER){ 2350 #ifdef ENABLE_LE_CENTRAL 2351 // if we're master on an le connection, it was an outgoing connection and we're done with it 2352 // note: no hci_connection_t object exists yet for connect with whitelist 2353 if (hci_is_le_connection_type(addr_type)){ 2354 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2355 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2356 } 2357 #endif 2358 } else { 2359 #ifdef ENABLE_LE_PERIPHERAL 2360 // if we're slave, it was an incoming connection, advertisements have stopped 2361 hci_stack->le_advertisements_active = false; 2362 #endif 2363 } 2364 2365 // LE connections are auto-accepted, so just create a connection if there isn't one already 2366 if (!conn){ 2367 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2368 } 2369 2370 // no memory, sorry. 2371 if (!conn){ 2372 return; 2373 } 2374 2375 conn->state = OPEN; 2376 conn->role = packet[6]; 2377 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2378 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2379 2380 #ifdef ENABLE_LE_PERIPHERAL 2381 if (packet[6] == HCI_ROLE_SLAVE){ 2382 hci_update_advertisements_enabled_for_current_roles(); 2383 } 2384 #endif 2385 2386 // init unenhanced att bearer mtu 2387 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2388 conn->att_connection.mtu_exchanged = false; 2389 2390 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2391 2392 // restart timer 2393 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2394 // btstack_run_loop_add_timer(&conn->timeout); 2395 2396 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2397 2398 hci_emit_nr_connections_changed(); 2399 } 2400 #endif 2401 2402 #ifdef ENABLE_CLASSIC 2403 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){ 2404 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2405 // LEVEL_4 is tested by l2cap 2406 // LEVEL 3 requires MITM protection -> check io capabilities 2407 if (level >= LEVEL_3){ 2408 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2409 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2410 if ((io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) && (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY)) return false; 2411 } 2412 // LEVEL 2 requires SSP, which is a given 2413 return true; 2414 } 2415 2416 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2417 uint16_t i; 2418 for (i=0; i < size ; i++){ 2419 if (data[i] != 0) { 2420 return false; 2421 } 2422 } 2423 return true; 2424 } 2425 2426 #endif 2427 2428 static void event_handler(uint8_t *packet, uint16_t size){ 2429 2430 uint16_t event_length = packet[1]; 2431 2432 // assert packet is complete 2433 if (size != (event_length + 2u)){ 2434 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2435 return; 2436 } 2437 2438 bd_addr_type_t addr_type; 2439 hci_con_handle_t handle; 2440 hci_connection_t * conn; 2441 int i; 2442 int create_connection_cmd; 2443 2444 #ifdef ENABLE_CLASSIC 2445 hci_link_type_t link_type; 2446 bd_addr_t addr; 2447 #endif 2448 2449 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2450 2451 switch (hci_event_packet_get_type(packet)) { 2452 2453 case HCI_EVENT_COMMAND_COMPLETE: 2454 handle_command_complete_event(packet, size); 2455 break; 2456 2457 case HCI_EVENT_COMMAND_STATUS: 2458 // get num cmd packets - limit to 1 to reduce complexity 2459 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2460 2461 // check command status to detected failed outgoing connections 2462 create_connection_cmd = 0; 2463 #ifdef ENABLE_CLASSIC 2464 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2465 create_connection_cmd = 1; 2466 } 2467 #endif 2468 #ifdef ENABLE_LE_CENTRAL 2469 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2470 create_connection_cmd = 1; 2471 } 2472 #endif 2473 if (create_connection_cmd) { 2474 uint8_t status = hci_event_command_status_get_status(packet); 2475 addr_type = hci_stack->outgoing_addr_type; 2476 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2477 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); 2478 2479 // reset outgoing address info 2480 memset(hci_stack->outgoing_addr, 0, 6); 2481 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2482 2483 // on error 2484 if (status != ERROR_CODE_SUCCESS){ 2485 #ifdef ENABLE_LE_CENTRAL 2486 if (hci_is_le_connection_type(addr_type)){ 2487 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2488 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2489 } 2490 #endif 2491 // error => outgoing connection failed 2492 if (conn != NULL){ 2493 hci_handle_connection_failed(conn, status); 2494 } 2495 } 2496 } 2497 2498 #ifdef ENABLE_CLASSIC 2499 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2500 uint8_t status = hci_event_command_status_get_status(packet); 2501 log_info("command status (inquiry), status %x", status); 2502 if (status == ERROR_CODE_SUCCESS) { 2503 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2504 } else { 2505 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2506 } 2507 } 2508 #endif 2509 break; 2510 2511 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2512 if (size < 3) return; 2513 uint16_t num_handles = packet[2]; 2514 if (size != (3u + num_handles * 4u)) return; 2515 uint16_t offset = 3; 2516 for (i=0; i<num_handles;i++){ 2517 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2518 offset += 2u; 2519 uint16_t num_packets = little_endian_read_16(packet, offset); 2520 offset += 2u; 2521 2522 conn = hci_connection_for_handle(handle); 2523 if (!conn){ 2524 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2525 continue; 2526 } 2527 2528 if (conn->num_packets_sent >= num_packets){ 2529 conn->num_packets_sent -= num_packets; 2530 } else { 2531 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2532 conn->num_packets_sent = 0; 2533 } 2534 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2535 2536 #ifdef ENABLE_CLASSIC 2537 // For SCO, we do the can_send_now_check here 2538 hci_notify_if_sco_can_send_now(); 2539 #endif 2540 } 2541 break; 2542 } 2543 2544 #ifdef ENABLE_CLASSIC 2545 case HCI_EVENT_INQUIRY_COMPLETE: 2546 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2547 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2548 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2549 hci_emit_event(event, sizeof(event), 1); 2550 } 2551 break; 2552 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2553 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2554 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2555 } 2556 break; 2557 case HCI_EVENT_CONNECTION_REQUEST: 2558 reverse_bd_addr(&packet[2], addr); 2559 link_type = (hci_link_type_t) packet[11]; 2560 2561 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2562 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2563 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2564 bd_addr_copy(hci_stack->decline_addr, addr); 2565 break; 2566 } 2567 2568 if (hci_stack->gap_classic_accept_callback != NULL){ 2569 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2570 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2571 bd_addr_copy(hci_stack->decline_addr, addr); 2572 break; 2573 } 2574 } 2575 2576 // TODO: eval COD 8-10 2577 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2578 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2579 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2580 if (!conn) { 2581 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2582 } 2583 if (!conn) { 2584 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2585 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2586 bd_addr_copy(hci_stack->decline_addr, addr); 2587 break; 2588 } 2589 conn->role = HCI_ROLE_SLAVE; 2590 conn->state = RECEIVED_CONNECTION_REQUEST; 2591 // store info about eSCO 2592 if (link_type == HCI_LINK_TYPE_ESCO){ 2593 conn->remote_supported_features[0] |= 1; 2594 } 2595 hci_run(); 2596 break; 2597 2598 case HCI_EVENT_CONNECTION_COMPLETE: 2599 // Connection management 2600 reverse_bd_addr(&packet[5], addr); 2601 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2602 addr_type = BD_ADDR_TYPE_ACL; 2603 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2604 if (conn) { 2605 if (!packet[2]){ 2606 conn->state = OPEN; 2607 conn->con_handle = little_endian_read_16(packet, 3); 2608 2609 // queue get remote feature 2610 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2611 2612 // queue set supervision timeout if we're master 2613 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2614 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2615 } 2616 2617 // restart timer 2618 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2619 btstack_run_loop_add_timer(&conn->timeout); 2620 2621 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2622 2623 hci_emit_nr_connections_changed(); 2624 } else { 2625 // connection failed 2626 hci_handle_connection_failed(conn, packet[2]); 2627 } 2628 } 2629 break; 2630 2631 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2632 reverse_bd_addr(&packet[5], addr); 2633 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2634 if (packet[2]){ 2635 // connection failed 2636 break; 2637 } 2638 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2639 if (!conn) { 2640 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2641 } 2642 if (!conn) { 2643 break; 2644 } 2645 conn->state = OPEN; 2646 conn->con_handle = little_endian_read_16(packet, 3); 2647 2648 #ifdef ENABLE_SCO_OVER_HCI 2649 // update SCO 2650 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2651 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2652 } 2653 // trigger can send now 2654 if (hci_have_usb_transport()){ 2655 hci_stack->sco_can_send_now = 1; 2656 } 2657 #endif 2658 #ifdef HAVE_SCO_TRANSPORT 2659 // configure sco transport 2660 if (hci_stack->sco_transport != NULL){ 2661 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2662 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2663 } 2664 #endif 2665 break; 2666 2667 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2668 handle = little_endian_read_16(packet, 3); 2669 conn = hci_connection_for_handle(handle); 2670 if (!conn) break; 2671 if (!packet[2]){ 2672 const uint8_t * features = &packet[5]; 2673 hci_handle_remote_features_page_0(conn, features); 2674 2675 // read extended features if possible 2676 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2677 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2678 break; 2679 } 2680 } 2681 hci_handle_remote_features_received(conn); 2682 break; 2683 2684 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2685 handle = little_endian_read_16(packet, 3); 2686 conn = hci_connection_for_handle(handle); 2687 if (!conn) break; 2688 // status = ok, page = 1 2689 if (!packet[2]) { 2690 uint8_t page_number = packet[5]; 2691 uint8_t maximum_page_number = packet[6]; 2692 const uint8_t * features = &packet[7]; 2693 bool done = false; 2694 switch (page_number){ 2695 case 1: 2696 hci_handle_remote_features_page_1(conn, features); 2697 if (maximum_page_number >= 2){ 2698 // get Secure Connections (Controller) from Page 2 if available 2699 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2700 } else { 2701 // otherwise, assume SC (Controller) == SC (Host) 2702 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2703 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2704 } 2705 done = true; 2706 } 2707 break; 2708 case 2: 2709 hci_handle_remote_features_page_2(conn, features); 2710 done = true; 2711 break; 2712 default: 2713 break; 2714 } 2715 if (!done) break; 2716 } 2717 hci_handle_remote_features_received(conn); 2718 break; 2719 2720 case HCI_EVENT_LINK_KEY_REQUEST: 2721 // request handled by hci_run() 2722 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2723 break; 2724 2725 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2726 hci_event_link_key_request_get_bd_addr(packet, addr); 2727 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2728 if (!conn) break; 2729 2730 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2731 2732 // CVE-2020-26555: ignore NULL link key 2733 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2734 if (btstack_is_null(&packet[8], 16)) break; 2735 2736 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2737 // Change Connection Encryption keeps link key type 2738 if (link_key_type != CHANGED_COMBINATION_KEY){ 2739 conn->link_key_type = link_key_type; 2740 } 2741 2742 // cache link key. link keys stored in little-endian format for legacy reasons 2743 memcpy(&conn->link_key, &packet[8], 16); 2744 2745 // only store link key: 2746 // - if bondable enabled 2747 if (hci_stack->bondable == false) break; 2748 // - if security level sufficient 2749 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2750 // - for SSP, also check if remote side requested bonding as well 2751 if (conn->link_key_type != COMBINATION_KEY){ 2752 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2753 if (!remote_bonding){ 2754 break; 2755 } 2756 } 2757 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2758 break; 2759 } 2760 2761 case HCI_EVENT_PIN_CODE_REQUEST: 2762 hci_event_pin_code_request_get_bd_addr(packet, addr); 2763 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2764 if (!conn) break; 2765 2766 hci_pairing_started(conn, false); 2767 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2768 if (!hci_stack->bondable ){ 2769 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2770 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2771 hci_run(); 2772 return; 2773 } 2774 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2775 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2776 log_info("Level 4 required, but SC not supported -> abort"); 2777 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2778 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2779 hci_run(); 2780 return; 2781 } 2782 break; 2783 2784 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2785 hci_event_io_capability_response_get_bd_addr(packet, addr); 2786 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2787 if (!conn) break; 2788 2789 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2790 hci_pairing_started(conn, true); 2791 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2792 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2793 break; 2794 2795 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2796 hci_event_io_capability_response_get_bd_addr(packet, addr); 2797 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2798 if (!conn) break; 2799 2800 hci_connection_timestamp(conn); 2801 2802 hci_pairing_started(conn, true); 2803 2804 // assess security 2805 if ((hci_stack->gap_secure_connections_only_mode || (conn->requested_security_level == LEVEL_4)) && !hci_remote_sc_enabled(conn)){ 2806 log_info("Level 4 required, but SC not supported -> abort"); 2807 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2808 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2809 break; 2810 } 2811 2812 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2813 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2814 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2815 } else { 2816 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2817 } 2818 #endif 2819 break; 2820 2821 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2822 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2823 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2824 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2825 if (!conn) break; 2826 2827 hci_connection_timestamp(conn); 2828 2829 hci_pairing_started(conn, true); 2830 2831 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2832 break; 2833 #endif 2834 2835 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2836 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2837 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2838 if (!conn) break; 2839 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2840 if (hci_stack->ssp_auto_accept){ 2841 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2842 }; 2843 } else { 2844 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2845 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2846 // don't forward event to app 2847 hci_run(); 2848 return; 2849 } 2850 break; 2851 2852 case HCI_EVENT_USER_PASSKEY_REQUEST: 2853 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2854 if (hci_stack->ssp_auto_accept){ 2855 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2856 }; 2857 break; 2858 2859 case HCI_EVENT_MODE_CHANGE: 2860 handle = hci_event_mode_change_get_handle(packet); 2861 conn = hci_connection_for_handle(handle); 2862 if (!conn) break; 2863 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2864 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2865 break; 2866 #endif 2867 2868 case HCI_EVENT_ENCRYPTION_CHANGE: 2869 handle = hci_event_encryption_change_get_connection_handle(packet); 2870 conn = hci_connection_for_handle(handle); 2871 if (!conn) break; 2872 if (hci_event_encryption_change_get_status(packet) == 0u) { 2873 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2874 if (encryption_enabled){ 2875 if (hci_is_le_connection(conn)){ 2876 // For LE, we accept connection as encrypted 2877 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2878 } 2879 #ifdef ENABLE_CLASSIC 2880 else { 2881 2882 // dedicated bonding: send result and disconnect 2883 if (conn->bonding_flags & BONDING_DEDICATED){ 2884 conn->bonding_flags &= ~BONDING_DEDICATED; 2885 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2886 conn->bonding_status = packet[2]; 2887 break; 2888 } 2889 2890 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2891 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2892 bool connected_uses_aes_ccm = encryption_enabled == 2; 2893 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2894 log_info("SC during pairing, but only E0 now -> abort"); 2895 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2896 break; 2897 } 2898 2899 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2900 if (connected_uses_aes_ccm){ 2901 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2902 } 2903 2904 #ifdef ENABLE_TESTING_SUPPORT 2905 // work around for issue with PTS dongle 2906 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2907 #endif 2908 2909 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2910 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2911 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2912 } else { 2913 // if not, pretend everything is perfect 2914 hci_handle_read_encryption_key_size_complete(conn, 16); 2915 } 2916 } 2917 #endif 2918 } else { 2919 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 2920 } 2921 } 2922 2923 break; 2924 2925 #ifdef ENABLE_CLASSIC 2926 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2927 handle = hci_event_authentication_complete_get_connection_handle(packet); 2928 conn = hci_connection_for_handle(handle); 2929 if (!conn) break; 2930 2931 // clear authentication active flag 2932 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 2933 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 2934 2935 // authenticated only if auth status == 0 2936 if (hci_event_authentication_complete_get_status(packet) == 0){ 2937 // authenticated 2938 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2939 2940 // If not already encrypted, start encryption 2941 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 2942 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2943 break; 2944 } 2945 } 2946 2947 // emit updated security level 2948 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2949 break; 2950 2951 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 2952 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 2953 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2954 if (!conn) break; 2955 2956 // treat successfully paired connection as authenticated 2957 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 2958 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2959 } 2960 2961 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 2962 break; 2963 #endif 2964 2965 // HCI_EVENT_DISCONNECTION_COMPLETE 2966 // has been split, to first notify stack before shutting connection down 2967 // see end of function, too. 2968 case HCI_EVENT_DISCONNECTION_COMPLETE: 2969 if (packet[2]) break; // status != 0 2970 handle = little_endian_read_16(packet, 3); 2971 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2972 if (hci_stack->acl_fragmentation_total_size > 0u) { 2973 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2974 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2975 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2976 hci_stack->acl_fragmentation_total_size = 0; 2977 hci_stack->acl_fragmentation_pos = 0; 2978 if (release_buffer){ 2979 hci_release_packet_buffer(); 2980 } 2981 } 2982 } 2983 2984 conn = hci_connection_for_handle(handle); 2985 if (!conn) break; 2986 #ifdef ENABLE_CLASSIC 2987 // pairing failed if it was ongoing 2988 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 2989 #endif 2990 // mark connection for shutdown 2991 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2992 2993 // emit dedicatd bonding event 2994 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2995 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2996 } 2997 2998 #ifdef ENABLE_BLE 2999 #ifdef ENABLE_LE_PERIPHERAL 3000 // re-enable advertisements for le connections if active 3001 if (hci_is_le_connection(conn)){ 3002 hci_update_advertisements_enabled_for_current_roles(); 3003 } 3004 #endif 3005 #endif 3006 break; 3007 3008 case HCI_EVENT_HARDWARE_ERROR: 3009 log_error("Hardware Error: 0x%02x", packet[2]); 3010 if (hci_stack->hardware_error_callback){ 3011 (*hci_stack->hardware_error_callback)(packet[2]); 3012 } else { 3013 // if no special requests, just reboot stack 3014 hci_power_control_off(); 3015 hci_power_control_on(); 3016 } 3017 break; 3018 3019 #ifdef ENABLE_CLASSIC 3020 case HCI_EVENT_ROLE_CHANGE: 3021 if (packet[2]) break; // status != 0 3022 reverse_bd_addr(&packet[3], addr); 3023 addr_type = BD_ADDR_TYPE_ACL; 3024 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3025 if (!conn) break; 3026 conn->role = packet[9]; 3027 break; 3028 #endif 3029 3030 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3031 // release packet buffer only for asynchronous transport and if there are not further fragements 3032 if (hci_transport_synchronous()) { 3033 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3034 return; // instead of break: to avoid re-entering hci_run() 3035 } 3036 hci_stack->acl_fragmentation_tx_active = 0; 3037 if (hci_stack->acl_fragmentation_total_size) break; 3038 hci_release_packet_buffer(); 3039 3040 // L2CAP receives this event via the hci_emit_event below 3041 3042 #ifdef ENABLE_CLASSIC 3043 // For SCO, we do the can_send_now_check here 3044 hci_notify_if_sco_can_send_now(); 3045 #endif 3046 break; 3047 3048 #ifdef ENABLE_CLASSIC 3049 case HCI_EVENT_SCO_CAN_SEND_NOW: 3050 // For SCO, we do the can_send_now_check here 3051 hci_stack->sco_can_send_now = 1; 3052 hci_notify_if_sco_can_send_now(); 3053 return; 3054 3055 // explode inquriy results for easier consumption 3056 case HCI_EVENT_INQUIRY_RESULT: 3057 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3058 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3059 gap_inquiry_explode(packet, size); 3060 break; 3061 #endif 3062 3063 #ifdef ENABLE_BLE 3064 case HCI_EVENT_LE_META: 3065 switch (packet[2]){ 3066 #ifdef ENABLE_LE_CENTRAL 3067 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3068 // log_info("advertising report received"); 3069 if (!hci_stack->le_scanning_enabled) break; 3070 le_handle_advertisement_report(packet, size); 3071 break; 3072 #endif 3073 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3074 event_handle_le_connection_complete(packet); 3075 break; 3076 3077 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3078 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3079 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3080 conn = hci_connection_for_handle(handle); 3081 if (!conn) break; 3082 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3083 break; 3084 3085 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3086 // connection 3087 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3088 conn = hci_connection_for_handle(handle); 3089 if (conn) { 3090 // read arguments 3091 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3092 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3093 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3094 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3095 3096 // validate against current connection parameter range 3097 le_connection_parameter_range_t existing_range; 3098 gap_get_connection_parameter_range(&existing_range); 3099 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3100 if (update_parameter){ 3101 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3102 conn->le_conn_interval_min = le_conn_interval_min; 3103 conn->le_conn_interval_max = le_conn_interval_max; 3104 conn->le_conn_latency = le_conn_latency; 3105 conn->le_supervision_timeout = le_supervision_timeout; 3106 } else { 3107 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3108 } 3109 } 3110 break; 3111 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3112 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3113 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3114 conn = hci_connection_for_handle(handle); 3115 if (conn) { 3116 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3117 } 3118 break; 3119 #endif 3120 default: 3121 break; 3122 } 3123 break; 3124 #endif 3125 case HCI_EVENT_VENDOR_SPECIFIC: 3126 // Vendor specific commands often create vendor specific event instead of num completed packets 3127 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3128 switch (hci_stack->manufacturer){ 3129 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3130 hci_stack->num_cmd_packets = 1; 3131 break; 3132 default: 3133 break; 3134 } 3135 break; 3136 default: 3137 break; 3138 } 3139 3140 handle_event_for_current_stack_state(packet, size); 3141 3142 // notify upper stack 3143 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3144 3145 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3146 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3147 handle = little_endian_read_16(packet, 3); 3148 hci_connection_t * aConn = hci_connection_for_handle(handle); 3149 // discard connection if app did not trigger a reconnect in the event handler 3150 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3151 hci_shutdown_connection(aConn); 3152 } 3153 } 3154 3155 // execute main loop 3156 hci_run(); 3157 } 3158 3159 #ifdef ENABLE_CLASSIC 3160 3161 #ifdef ENABLE_SCO_OVER_HCI 3162 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3163 static void sco_schedule_tx(hci_connection_t * conn); 3164 3165 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3166 log_debug("SCO TX Timeout"); 3167 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3168 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3169 if (!conn) return; 3170 3171 // trigger send 3172 conn->sco_tx_ready = 1; 3173 // extra packet if CVSD but SCO buffer is too short 3174 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3175 conn->sco_tx_ready++; 3176 } 3177 hci_notify_if_sco_can_send_now(); 3178 } 3179 3180 3181 #define SCO_TX_AFTER_RX_MS (6) 3182 3183 static void sco_schedule_tx(hci_connection_t * conn){ 3184 3185 uint32_t now = btstack_run_loop_get_time_ms(); 3186 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3187 int time_delta_ms = sco_tx_ms - now; 3188 3189 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3190 3191 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3192 btstack_run_loop_remove_timer(timer); 3193 btstack_run_loop_set_timer(timer, time_delta_ms); 3194 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3195 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3196 btstack_run_loop_add_timer(timer); 3197 } 3198 #endif 3199 3200 static void sco_handler(uint8_t * packet, uint16_t size){ 3201 // lookup connection struct 3202 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3203 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3204 if (!conn) return; 3205 3206 #ifdef ENABLE_SCO_OVER_HCI 3207 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3208 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3209 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3210 packet[2] = 0x3c; 3211 memmove(&packet[3], &packet[23], 63); 3212 size = 63; 3213 } 3214 } 3215 3216 if (hci_have_usb_transport()){ 3217 // Nothing to do 3218 } else { 3219 // 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); 3220 if (hci_stack->synchronous_flow_control_enabled == 0){ 3221 uint32_t now = btstack_run_loop_get_time_ms(); 3222 3223 if (!conn->sco_rx_valid){ 3224 // ignore first 10 packets 3225 conn->sco_rx_count++; 3226 // log_debug("sco rx count %u", conn->sco_rx_count); 3227 if (conn->sco_rx_count == 10) { 3228 // use first timestamp as is and pretent it just started 3229 conn->sco_rx_ms = now; 3230 conn->sco_rx_valid = 1; 3231 conn->sco_rx_count = 0; 3232 sco_schedule_tx(conn); 3233 } 3234 } else { 3235 // track expected arrival timme 3236 conn->sco_rx_count++; 3237 conn->sco_rx_ms += 7; 3238 int delta = (int32_t) (now - conn->sco_rx_ms); 3239 if (delta > 0){ 3240 conn->sco_rx_ms++; 3241 } 3242 // log_debug("sco rx %u", conn->sco_rx_ms); 3243 sco_schedule_tx(conn); 3244 } 3245 } 3246 } 3247 #endif 3248 3249 // deliver to app 3250 if (hci_stack->sco_packet_handler) { 3251 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3252 } 3253 3254 #ifdef HAVE_SCO_TRANSPORT 3255 // We can send one packet for each received packet 3256 conn->sco_tx_ready++; 3257 hci_notify_if_sco_can_send_now(); 3258 #endif 3259 3260 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3261 conn->num_packets_completed++; 3262 hci_stack->host_completed_packets = 1; 3263 hci_run(); 3264 #endif 3265 } 3266 #endif 3267 3268 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3269 hci_dump_packet(packet_type, 1, packet, size); 3270 switch (packet_type) { 3271 case HCI_EVENT_PACKET: 3272 event_handler(packet, size); 3273 break; 3274 case HCI_ACL_DATA_PACKET: 3275 acl_handler(packet, size); 3276 break; 3277 #ifdef ENABLE_CLASSIC 3278 case HCI_SCO_DATA_PACKET: 3279 sco_handler(packet, size); 3280 break; 3281 #endif 3282 default: 3283 break; 3284 } 3285 } 3286 3287 /** 3288 * @brief Add event packet handler. 3289 */ 3290 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3291 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3292 } 3293 3294 3295 /** Register HCI packet handlers */ 3296 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3297 hci_stack->acl_packet_handler = handler; 3298 } 3299 3300 #ifdef ENABLE_CLASSIC 3301 /** 3302 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3303 */ 3304 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3305 hci_stack->sco_packet_handler = handler; 3306 } 3307 #endif 3308 3309 static void hci_state_reset(void){ 3310 // no connections yet 3311 hci_stack->connections = NULL; 3312 3313 // keep discoverable/connectable as this has been requested by the client(s) 3314 // hci_stack->discoverable = 0; 3315 // hci_stack->connectable = 0; 3316 // hci_stack->bondable = 1; 3317 // hci_stack->own_addr_type = 0; 3318 3319 // buffer is free 3320 hci_stack->hci_packet_buffer_reserved = 0; 3321 3322 // no pending cmds 3323 hci_stack->decline_reason = 0; 3324 hci_stack->new_scan_enable_value = 0xff; 3325 3326 hci_stack->secure_connections_active = false; 3327 3328 #ifdef ENABLE_CLASSIC 3329 hci_stack->new_page_scan_interval = 0xffff; 3330 hci_stack->new_page_scan_window = 0xffff; 3331 hci_stack->new_page_scan_type = 0xff; 3332 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3333 #endif 3334 3335 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3336 hci_stack->classic_read_local_oob_data = true; 3337 #endif 3338 3339 // LE 3340 #ifdef ENABLE_BLE 3341 memset(hci_stack->le_random_address, 0, 6); 3342 hci_stack->le_random_address_set = 0; 3343 #endif 3344 #ifdef ENABLE_LE_CENTRAL 3345 hci_stack->le_scanning_active = false; 3346 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3347 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3348 hci_stack->le_whitelist_capacity = 0; 3349 #endif 3350 #ifdef ENABLE_LE_PERIPHERAL 3351 hci_stack->le_advertisements_active = false; 3352 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3353 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3354 } 3355 if (hci_stack->le_advertisements_data != NULL){ 3356 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3357 } 3358 #endif 3359 } 3360 3361 #ifdef ENABLE_CLASSIC 3362 /** 3363 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3364 */ 3365 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3366 // store and open remote device db 3367 hci_stack->link_key_db = link_key_db; 3368 if (hci_stack->link_key_db) { 3369 hci_stack->link_key_db->open(); 3370 } 3371 } 3372 #endif 3373 3374 void hci_init(const hci_transport_t *transport, const void *config){ 3375 3376 #ifdef HAVE_MALLOC 3377 if (!hci_stack) { 3378 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3379 } 3380 #else 3381 hci_stack = &hci_stack_static; 3382 #endif 3383 memset(hci_stack, 0, sizeof(hci_stack_t)); 3384 3385 // reference to use transport layer implementation 3386 hci_stack->hci_transport = transport; 3387 3388 // reference to used config 3389 hci_stack->config = config; 3390 3391 // setup pointer for outgoing packet buffer 3392 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3393 3394 // max acl payload size defined in config.h 3395 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3396 3397 // register packet handlers with transport 3398 transport->register_packet_handler(&packet_handler); 3399 3400 hci_stack->state = HCI_STATE_OFF; 3401 3402 // class of device 3403 hci_stack->class_of_device = 0x007a020c; // Smartphone 3404 3405 // bondable by default 3406 hci_stack->bondable = 1; 3407 3408 #ifdef ENABLE_CLASSIC 3409 // classic name 3410 hci_stack->local_name = default_classic_name; 3411 3412 // Master slave policy 3413 hci_stack->master_slave_policy = 1; 3414 3415 // Allow Role Switch 3416 hci_stack->allow_role_switch = 1; 3417 3418 // Default / minimum security level = 2 3419 hci_stack->gap_security_level = LEVEL_2; 3420 3421 // Default Security Mode 4 3422 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3423 3424 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3425 hci_stack->gap_required_encyrption_key_size = 7; 3426 3427 // Link Supervision Timeout 3428 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3429 3430 #endif 3431 3432 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3433 hci_stack->ssp_enable = 1; 3434 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3435 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3436 hci_stack->ssp_auto_accept = 1; 3437 3438 // Secure Connections: enable (requires support from Controller) 3439 hci_stack->secure_connections_enable = true; 3440 3441 // voice setting - signed 16 bit pcm data with CVSD over the air 3442 hci_stack->sco_voice_setting = 0x60; 3443 3444 #ifdef ENABLE_LE_CENTRAL 3445 // connection parameter to use for outgoing connections 3446 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3447 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3448 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3449 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3450 hci_stack->le_connection_latency = 4; // 4 3451 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3452 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3453 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3454 3455 // default LE Scanning 3456 hci_stack->le_scan_type = 0x1; // active 3457 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3458 hci_stack->le_scan_window = 0x30; // 30 ms 3459 #endif 3460 3461 #ifdef ENABLE_LE_PERIPHERAL 3462 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3463 #endif 3464 3465 // connection parameter range used to answer connection parameter update requests in l2cap 3466 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3467 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3468 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3469 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3470 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3471 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3472 3473 hci_state_reset(); 3474 } 3475 3476 void hci_deinit(void){ 3477 #ifdef HAVE_MALLOC 3478 if (hci_stack) { 3479 free(hci_stack); 3480 } 3481 #endif 3482 hci_stack = NULL; 3483 3484 #ifdef ENABLE_CLASSIC 3485 disable_l2cap_timeouts = 0; 3486 #endif 3487 } 3488 3489 /** 3490 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3491 */ 3492 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3493 hci_stack->chipset = chipset_driver; 3494 3495 // reset chipset driver - init is also called on power_up 3496 if (hci_stack->chipset && hci_stack->chipset->init){ 3497 hci_stack->chipset->init(hci_stack->config); 3498 } 3499 } 3500 3501 /** 3502 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3503 */ 3504 void hci_set_control(const btstack_control_t *hardware_control){ 3505 // references to used control implementation 3506 hci_stack->control = hardware_control; 3507 // init with transport config 3508 hardware_control->init(hci_stack->config); 3509 } 3510 3511 void hci_close(void){ 3512 3513 #ifdef ENABLE_CLASSIC 3514 // close remote device db 3515 if (hci_stack->link_key_db) { 3516 hci_stack->link_key_db->close(); 3517 } 3518 #endif 3519 3520 btstack_linked_list_iterator_t lit; 3521 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3522 while (btstack_linked_list_iterator_has_next(&lit)){ 3523 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3524 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3525 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3526 hci_shutdown_connection(connection); 3527 } 3528 3529 hci_power_control(HCI_POWER_OFF); 3530 3531 #ifdef HAVE_MALLOC 3532 free(hci_stack); 3533 #endif 3534 hci_stack = NULL; 3535 } 3536 3537 #ifdef HAVE_SCO_TRANSPORT 3538 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3539 hci_stack->sco_transport = sco_transport; 3540 sco_transport->register_packet_handler(&packet_handler); 3541 } 3542 #endif 3543 3544 #ifdef ENABLE_CLASSIC 3545 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3546 // validate ranage and set 3547 if (encryption_key_size < 7) return; 3548 if (encryption_key_size > 16) return; 3549 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3550 } 3551 3552 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3553 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3554 hci_stack->gap_security_mode = security_mode; 3555 return ERROR_CODE_SUCCESS; 3556 } else { 3557 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3558 } 3559 } 3560 3561 gap_security_mode_t gap_get_security_mode(void){ 3562 return hci_stack->gap_security_mode; 3563 } 3564 3565 void gap_set_security_level(gap_security_level_t security_level){ 3566 hci_stack->gap_security_level = security_level; 3567 } 3568 3569 gap_security_level_t gap_get_security_level(void){ 3570 if (hci_stack->gap_secure_connections_only_mode){ 3571 return LEVEL_4; 3572 } 3573 return hci_stack->gap_security_level; 3574 } 3575 3576 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3577 hci_stack->gap_minimal_service_security_level = security_level; 3578 } 3579 3580 void gap_set_secure_connections_only_mode(bool enable){ 3581 hci_stack->gap_secure_connections_only_mode = enable; 3582 } 3583 3584 bool gap_get_secure_connections_only_mode(void){ 3585 return hci_stack->gap_secure_connections_only_mode; 3586 } 3587 #endif 3588 3589 #ifdef ENABLE_CLASSIC 3590 void gap_set_class_of_device(uint32_t class_of_device){ 3591 hci_stack->class_of_device = class_of_device; 3592 } 3593 3594 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3595 hci_stack->default_link_policy_settings = default_link_policy_settings; 3596 } 3597 3598 void gap_set_allow_role_switch(bool allow_role_switch){ 3599 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3600 } 3601 3602 uint8_t hci_get_allow_role_switch(void){ 3603 return hci_stack->allow_role_switch; 3604 } 3605 3606 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3607 hci_stack->link_supervision_timeout = link_supervision_timeout; 3608 } 3609 3610 void hci_disable_l2cap_timeout_check(void){ 3611 disable_l2cap_timeouts = 1; 3612 } 3613 #endif 3614 3615 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3616 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3617 void hci_set_bd_addr(bd_addr_t addr){ 3618 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3619 hci_stack->custom_bd_addr_set = 1; 3620 } 3621 #endif 3622 3623 // State-Module-Driver overview 3624 // state module low-level 3625 // HCI_STATE_OFF off close 3626 // HCI_STATE_INITIALIZING, on open 3627 // HCI_STATE_WORKING, on open 3628 // HCI_STATE_HALTING, on open 3629 // HCI_STATE_SLEEPING, off/sleep close 3630 // HCI_STATE_FALLING_ASLEEP on open 3631 3632 static int hci_power_control_on(void){ 3633 3634 // power on 3635 int err = 0; 3636 if (hci_stack->control && hci_stack->control->on){ 3637 err = (*hci_stack->control->on)(); 3638 } 3639 if (err){ 3640 log_error( "POWER_ON failed"); 3641 hci_emit_hci_open_failed(); 3642 return err; 3643 } 3644 3645 // int chipset driver 3646 if (hci_stack->chipset && hci_stack->chipset->init){ 3647 hci_stack->chipset->init(hci_stack->config); 3648 } 3649 3650 // init transport 3651 if (hci_stack->hci_transport->init){ 3652 hci_stack->hci_transport->init(hci_stack->config); 3653 } 3654 3655 // open transport 3656 err = hci_stack->hci_transport->open(); 3657 if (err){ 3658 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3659 if (hci_stack->control && hci_stack->control->off){ 3660 (*hci_stack->control->off)(); 3661 } 3662 hci_emit_hci_open_failed(); 3663 return err; 3664 } 3665 return 0; 3666 } 3667 3668 static void hci_power_control_off(void){ 3669 3670 log_info("hci_power_control_off"); 3671 3672 // close low-level device 3673 hci_stack->hci_transport->close(); 3674 3675 log_info("hci_power_control_off - hci_transport closed"); 3676 3677 // power off 3678 if (hci_stack->control && hci_stack->control->off){ 3679 (*hci_stack->control->off)(); 3680 } 3681 3682 log_info("hci_power_control_off - control closed"); 3683 3684 hci_stack->state = HCI_STATE_OFF; 3685 } 3686 3687 static void hci_power_control_sleep(void){ 3688 3689 log_info("hci_power_control_sleep"); 3690 3691 #if 0 3692 // don't close serial port during sleep 3693 3694 // close low-level device 3695 hci_stack->hci_transport->close(hci_stack->config); 3696 #endif 3697 3698 // sleep mode 3699 if (hci_stack->control && hci_stack->control->sleep){ 3700 (*hci_stack->control->sleep)(); 3701 } 3702 3703 hci_stack->state = HCI_STATE_SLEEPING; 3704 } 3705 3706 static int hci_power_control_wake(void){ 3707 3708 log_info("hci_power_control_wake"); 3709 3710 // wake on 3711 if (hci_stack->control && hci_stack->control->wake){ 3712 (*hci_stack->control->wake)(); 3713 } 3714 3715 #if 0 3716 // open low-level device 3717 int err = hci_stack->hci_transport->open(hci_stack->config); 3718 if (err){ 3719 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3720 if (hci_stack->control && hci_stack->control->off){ 3721 (*hci_stack->control->off)(); 3722 } 3723 hci_emit_hci_open_failed(); 3724 return err; 3725 } 3726 #endif 3727 3728 return 0; 3729 } 3730 3731 static void hci_power_transition_to_initializing(void){ 3732 // set up state machine 3733 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3734 hci_stack->hci_packet_buffer_reserved = 0; 3735 hci_stack->state = HCI_STATE_INITIALIZING; 3736 hci_stack->substate = HCI_INIT_SEND_RESET; 3737 } 3738 3739 // returns error 3740 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3741 int err; 3742 switch (power_mode){ 3743 case HCI_POWER_ON: 3744 err = hci_power_control_on(); 3745 if (err != 0) { 3746 log_error("hci_power_control_on() error %d", err); 3747 return err; 3748 } 3749 hci_power_transition_to_initializing(); 3750 break; 3751 case HCI_POWER_OFF: 3752 // do nothing 3753 break; 3754 case HCI_POWER_SLEEP: 3755 // do nothing (with SLEEP == OFF) 3756 break; 3757 default: 3758 btstack_assert(false); 3759 break; 3760 } 3761 return ERROR_CODE_SUCCESS; 3762 } 3763 3764 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3765 switch (power_mode){ 3766 case HCI_POWER_ON: 3767 // do nothing 3768 break; 3769 case HCI_POWER_OFF: 3770 // no connections yet, just turn it off 3771 hci_power_control_off(); 3772 break; 3773 case HCI_POWER_SLEEP: 3774 // no connections yet, just turn it off 3775 hci_power_control_sleep(); 3776 break; 3777 default: 3778 btstack_assert(false); 3779 break; 3780 } 3781 return ERROR_CODE_SUCCESS; 3782 } 3783 3784 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3785 switch (power_mode){ 3786 case HCI_POWER_ON: 3787 // do nothing 3788 break; 3789 case HCI_POWER_OFF: 3790 // see hci_run 3791 hci_stack->state = HCI_STATE_HALTING; 3792 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3793 break; 3794 case HCI_POWER_SLEEP: 3795 // see hci_run 3796 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3797 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3798 break; 3799 default: 3800 btstack_assert(false); 3801 break; 3802 } 3803 return ERROR_CODE_SUCCESS; 3804 } 3805 3806 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3807 switch (power_mode){ 3808 case HCI_POWER_ON: 3809 hci_power_transition_to_initializing(); 3810 break; 3811 case HCI_POWER_OFF: 3812 // do nothing 3813 break; 3814 case HCI_POWER_SLEEP: 3815 // see hci_run 3816 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3817 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3818 break; 3819 default: 3820 btstack_assert(false); 3821 break; 3822 } 3823 return ERROR_CODE_SUCCESS; 3824 } 3825 3826 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3827 switch (power_mode){ 3828 case HCI_POWER_ON: 3829 3830 #ifdef HAVE_PLATFORM_IPHONE_OS 3831 // nothing to do, if H4 supports power management 3832 if (btstack_control_iphone_power_management_enabled()){ 3833 hci_stack->state = HCI_STATE_INITIALIZING; 3834 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3835 break; 3836 } 3837 #endif 3838 hci_power_transition_to_initializing(); 3839 break; 3840 case HCI_POWER_OFF: 3841 // see hci_run 3842 hci_stack->state = HCI_STATE_HALTING; 3843 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3844 break; 3845 case HCI_POWER_SLEEP: 3846 // do nothing 3847 break; 3848 default: 3849 btstack_assert(false); 3850 break; 3851 } 3852 return ERROR_CODE_SUCCESS; 3853 } 3854 3855 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3856 int err; 3857 switch (power_mode){ 3858 case HCI_POWER_ON: 3859 #ifdef HAVE_PLATFORM_IPHONE_OS 3860 // nothing to do, if H4 supports power management 3861 if (btstack_control_iphone_power_management_enabled()){ 3862 hci_stack->state = HCI_STATE_INITIALIZING; 3863 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3864 hci_update_scan_enable(); 3865 break; 3866 } 3867 #endif 3868 err = hci_power_control_wake(); 3869 if (err) return err; 3870 hci_power_transition_to_initializing(); 3871 break; 3872 case HCI_POWER_OFF: 3873 hci_stack->state = HCI_STATE_HALTING; 3874 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3875 break; 3876 case HCI_POWER_SLEEP: 3877 // do nothing 3878 break; 3879 default: 3880 btstack_assert(false); 3881 break; 3882 } 3883 return ERROR_CODE_SUCCESS; 3884 } 3885 3886 int hci_power_control(HCI_POWER_MODE power_mode){ 3887 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3888 int err = 0; 3889 switch (hci_stack->state){ 3890 case HCI_STATE_OFF: 3891 err = hci_power_control_state_off(power_mode); 3892 break; 3893 case HCI_STATE_INITIALIZING: 3894 err = hci_power_control_state_initializing(power_mode); 3895 break; 3896 case HCI_STATE_WORKING: 3897 err = hci_power_control_state_working(power_mode); 3898 break; 3899 case HCI_STATE_HALTING: 3900 err = hci_power_control_state_halting(power_mode); 3901 break; 3902 case HCI_STATE_FALLING_ASLEEP: 3903 err = hci_power_control_state_falling_asleep(power_mode); 3904 break; 3905 case HCI_STATE_SLEEPING: 3906 err = hci_power_control_state_sleeping(power_mode); 3907 break; 3908 default: 3909 btstack_assert(false); 3910 break; 3911 } 3912 if (err != 0){ 3913 return err; 3914 } 3915 3916 // create internal event 3917 hci_emit_state(); 3918 3919 // trigger next/first action 3920 hci_run(); 3921 3922 return 0; 3923 } 3924 3925 3926 #ifdef ENABLE_CLASSIC 3927 3928 static void hci_update_scan_enable(void){ 3929 // 2 = page scan, 1 = inq scan 3930 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3931 hci_run(); 3932 } 3933 3934 void gap_discoverable_control(uint8_t enable){ 3935 if (enable) enable = 1; // normalize argument 3936 3937 if (hci_stack->discoverable == enable){ 3938 hci_emit_discoverable_enabled(hci_stack->discoverable); 3939 return; 3940 } 3941 3942 hci_stack->discoverable = enable; 3943 hci_update_scan_enable(); 3944 } 3945 3946 void gap_connectable_control(uint8_t enable){ 3947 if (enable) enable = 1; // normalize argument 3948 3949 // don't emit event 3950 if (hci_stack->connectable == enable) return; 3951 3952 hci_stack->connectable = enable; 3953 hci_update_scan_enable(); 3954 } 3955 #endif 3956 3957 void gap_local_bd_addr(bd_addr_t address_buffer){ 3958 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3959 } 3960 3961 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3962 static void hci_host_num_completed_packets(void){ 3963 3964 // create packet manually as arrays are not supported and num_commands should not get reduced 3965 hci_reserve_packet_buffer(); 3966 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3967 3968 uint16_t size = 0; 3969 uint16_t num_handles = 0; 3970 packet[size++] = 0x35; 3971 packet[size++] = 0x0c; 3972 size++; // skip param len 3973 size++; // skip num handles 3974 3975 // add { handle, packets } entries 3976 btstack_linked_item_t * it; 3977 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3978 hci_connection_t * connection = (hci_connection_t *) it; 3979 if (connection->num_packets_completed){ 3980 little_endian_store_16(packet, size, connection->con_handle); 3981 size += 2; 3982 little_endian_store_16(packet, size, connection->num_packets_completed); 3983 size += 2; 3984 // 3985 num_handles++; 3986 connection->num_packets_completed = 0; 3987 } 3988 } 3989 3990 packet[2] = size - 3; 3991 packet[3] = num_handles; 3992 3993 hci_stack->host_completed_packets = 0; 3994 3995 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3996 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3997 3998 // release packet buffer for synchronous transport implementations 3999 if (hci_transport_synchronous()){ 4000 hci_release_packet_buffer(); 4001 hci_emit_transport_packet_sent(); 4002 } 4003 } 4004 #endif 4005 4006 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4007 UNUSED(ds); 4008 hci_stack->substate = HCI_HALTING_CLOSE; 4009 // allow packet handlers to defer final shutdown 4010 hci_emit_state(); 4011 hci_run(); 4012 } 4013 4014 static bool hci_run_acl_fragments(void){ 4015 if (hci_stack->acl_fragmentation_total_size > 0u) { 4016 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4017 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4018 if (connection) { 4019 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4020 hci_send_acl_packet_fragments(connection); 4021 return true; 4022 } 4023 } else { 4024 // connection gone -> discard further fragments 4025 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4026 hci_stack->acl_fragmentation_total_size = 0; 4027 hci_stack->acl_fragmentation_pos = 0; 4028 } 4029 } 4030 return false; 4031 } 4032 4033 #ifdef ENABLE_CLASSIC 4034 static bool hci_run_general_gap_classic(void){ 4035 4036 // decline incoming connections 4037 if (hci_stack->decline_reason){ 4038 uint8_t reason = hci_stack->decline_reason; 4039 hci_stack->decline_reason = 0; 4040 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4041 return true; 4042 } 4043 // write page scan activity 4044 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 4045 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 4046 hci_stack->new_page_scan_interval = 0xffff; 4047 hci_stack->new_page_scan_window = 0xffff; 4048 return true; 4049 } 4050 // write page scan type 4051 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 4052 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 4053 hci_stack->new_page_scan_type = 0xff; 4054 return true; 4055 } 4056 // send scan enable 4057 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 4058 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 4059 hci_stack->new_scan_enable_value = 0xff; 4060 return true; 4061 } 4062 // start/stop inquiry 4063 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4064 uint8_t duration = hci_stack->inquiry_state; 4065 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4066 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4067 return true; 4068 } 4069 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4070 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4071 hci_send_cmd(&hci_inquiry_cancel); 4072 return true; 4073 } 4074 // remote name request 4075 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4076 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4077 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4078 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4079 return true; 4080 } 4081 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4082 // Local OOB data 4083 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 4084 hci_stack->classic_read_local_oob_data = false; 4085 if (hci_stack->local_supported_commands[1] & 0x10u){ 4086 hci_send_cmd(&hci_read_local_extended_oob_data); 4087 } else { 4088 hci_send_cmd(&hci_read_local_oob_data); 4089 } 4090 } 4091 #endif 4092 // pairing 4093 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4094 uint8_t state = hci_stack->gap_pairing_state; 4095 uint8_t pin_code[16]; 4096 switch (state){ 4097 case GAP_PAIRING_STATE_SEND_PIN: 4098 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4099 memset(pin_code, 0, 16); 4100 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4101 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4102 break; 4103 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4104 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4105 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4106 break; 4107 case GAP_PAIRING_STATE_SEND_PASSKEY: 4108 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4109 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4110 break; 4111 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4112 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4113 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4114 break; 4115 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4116 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4117 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4118 break; 4119 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4120 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4121 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4122 break; 4123 default: 4124 break; 4125 } 4126 return true; 4127 } 4128 return false; 4129 } 4130 #endif 4131 4132 #ifdef ENABLE_BLE 4133 static bool hci_run_general_gap_le(void){ 4134 4135 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4136 4137 if (hci_stack->state != HCI_STATE_WORKING) return false; 4138 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4139 4140 4141 // Phase 1: collect what to stop 4142 4143 bool scanning_stop = false; 4144 bool connecting_stop = false; 4145 bool advertising_stop = false; 4146 4147 #ifndef ENABLE_LE_CENTRAL 4148 UNUSED(scanning_stop); 4149 UNUSED(connecting_stop); 4150 #endif 4151 #ifndef ENABLE_LE_PERIPHERAL 4152 UNUSED(advertising_stop); 4153 #endif 4154 4155 // check if whitelist needs modification 4156 bool whitelist_modification_pending = false; 4157 btstack_linked_list_iterator_t lit; 4158 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4159 while (btstack_linked_list_iterator_has_next(&lit)){ 4160 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4161 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4162 whitelist_modification_pending = true; 4163 break; 4164 } 4165 } 4166 // check if resolving list needs modification 4167 bool resolving_list_modification_pending = false; 4168 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4169 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4170 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4171 resolving_list_modification_pending = true; 4172 } 4173 #endif 4174 4175 #ifdef ENABLE_LE_CENTRAL 4176 // scanning control 4177 if (hci_stack->le_scanning_active) { 4178 // stop if: 4179 // - parameter change required 4180 // - it's disabled 4181 // - whitelist change required but used for scanning 4182 // - resolving list modified 4183 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4184 if ((hci_stack->le_scanning_param_update) || 4185 !hci_stack->le_scanning_enabled || 4186 scanning_uses_whitelist || 4187 resolving_list_modification_pending){ 4188 4189 scanning_stop = true; 4190 } 4191 } 4192 #endif 4193 4194 #ifdef ENABLE_LE_CENTRAL 4195 // connecting control 4196 bool connecting_with_whitelist; 4197 switch (hci_stack->le_connecting_state){ 4198 case LE_CONNECTING_DIRECT: 4199 case LE_CONNECTING_WHITELIST: 4200 // stop connecting if: 4201 // - connecting uses white and whitelist modification pending 4202 // - if it got disabled 4203 // - resolving list modified 4204 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4205 if ((connecting_with_whitelist && whitelist_modification_pending) || 4206 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4207 resolving_list_modification_pending) { 4208 4209 connecting_stop = true; 4210 } 4211 break; 4212 default: 4213 break; 4214 } 4215 #endif 4216 4217 #ifdef ENABLE_LE_PERIPHERAL 4218 // le advertisement control 4219 if (hci_stack->le_advertisements_active){ 4220 // stop if: 4221 // - parameter change required 4222 // - it's disabled 4223 // - whitelist change required but used for advertisement filter policy 4224 // - resolving list modified 4225 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4226 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4227 if (advertising_change || 4228 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4229 (advertising_uses_whitelist & whitelist_modification_pending) || 4230 resolving_list_modification_pending) { 4231 4232 advertising_stop = true; 4233 } 4234 } 4235 #endif 4236 4237 4238 // Phase 2: stop everything that should be off during modifications 4239 4240 #ifdef ENABLE_LE_CENTRAL 4241 if (scanning_stop){ 4242 hci_stack->le_scanning_active = false; 4243 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4244 return true; 4245 } 4246 #endif 4247 4248 #ifdef ENABLE_LE_CENTRAL 4249 if (connecting_stop){ 4250 hci_send_cmd(&hci_le_create_connection_cancel); 4251 return true; 4252 } 4253 #endif 4254 4255 #ifdef ENABLE_LE_PERIPHERAL 4256 if (advertising_stop){ 4257 hci_stack->le_advertisements_active = false; 4258 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4259 return true; 4260 } 4261 #endif 4262 4263 // Phase 3: modify 4264 4265 #ifdef ENABLE_LE_CENTRAL 4266 if (hci_stack->le_scanning_param_update){ 4267 hci_stack->le_scanning_param_update = false; 4268 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4269 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4270 return true; 4271 } 4272 #endif 4273 4274 #ifdef ENABLE_LE_PERIPHERAL 4275 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4276 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4277 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4278 hci_send_cmd(&hci_le_set_advertising_parameters, 4279 hci_stack->le_advertisements_interval_min, 4280 hci_stack->le_advertisements_interval_max, 4281 hci_stack->le_advertisements_type, 4282 hci_stack->le_advertisements_own_addr_type, 4283 hci_stack->le_advertisements_direct_address_type, 4284 hci_stack->le_advertisements_direct_address, 4285 hci_stack->le_advertisements_channel_map, 4286 hci_stack->le_advertisements_filter_policy); 4287 return true; 4288 } 4289 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4290 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4291 uint8_t adv_data_clean[31]; 4292 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4293 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4294 hci_stack->le_advertisements_data_len); 4295 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4296 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4297 return true; 4298 } 4299 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4300 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4301 uint8_t scan_data_clean[31]; 4302 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4303 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4304 hci_stack->le_scan_response_data_len); 4305 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4306 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4307 return true; 4308 } 4309 #endif 4310 4311 4312 #ifdef ENABLE_LE_CENTRAL 4313 // if connect with whitelist was active and is not cancelled yet, wait until next time 4314 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4315 #endif 4316 4317 // LE Whitelist Management 4318 if (whitelist_modification_pending){ 4319 // add/remove entries 4320 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4321 while (btstack_linked_list_iterator_has_next(&lit)){ 4322 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4323 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4324 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4325 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4326 return true; 4327 } 4328 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4329 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4330 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4331 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4332 return true; 4333 } 4334 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4335 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4336 btstack_memory_whitelist_entry_free(entry); 4337 } 4338 } 4339 } 4340 4341 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4342 // LE Resolving List Management 4343 if (resolving_list_supported) { 4344 uint16_t i; 4345 switch (hci_stack->le_resolving_list_state) { 4346 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4347 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4348 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4349 return true; 4350 case LE_RESOLVING_LIST_READ_SIZE: 4351 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4352 hci_send_cmd(&hci_le_read_resolving_list_size); 4353 return true; 4354 case LE_RESOLVING_LIST_SEND_CLEAR: 4355 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4356 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4357 sizeof(hci_stack->le_resolving_list_add_entries)); 4358 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4359 sizeof(hci_stack->le_resolving_list_remove_entries)); 4360 hci_send_cmd(&hci_le_clear_resolving_list); 4361 return true; 4362 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4363 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4364 uint8_t offset = i >> 3; 4365 uint8_t mask = 1 << (i & 7); 4366 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4367 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4368 bd_addr_t peer_identity_addreses; 4369 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4370 sm_key_t peer_irk; 4371 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4372 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4373 4374 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4375 // trigger whitelist entry 'update' (work around for controller bug) 4376 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4377 while (btstack_linked_list_iterator_has_next(&lit)) { 4378 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4379 if (entry->address_type != peer_identity_addr_type) continue; 4380 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4381 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4382 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4383 } 4384 #endif 4385 4386 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4387 peer_identity_addreses); 4388 return true; 4389 } 4390 4391 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4392 4393 /* fall through */ 4394 4395 case LE_RESOLVING_LIST_ADD_ENTRIES: 4396 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4397 uint8_t offset = i >> 3; 4398 uint8_t mask = 1 << (i & 7); 4399 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4400 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4401 bd_addr_t peer_identity_addreses; 4402 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4403 sm_key_t peer_irk; 4404 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4405 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4406 const uint8_t *local_irk = gap_get_persistent_irk(); 4407 // command uses format specifier 'P' that stores 16-byte value without flip 4408 uint8_t local_irk_flipped[16]; 4409 uint8_t peer_irk_flipped[16]; 4410 reverse_128(local_irk, local_irk_flipped); 4411 reverse_128(peer_irk, peer_irk_flipped); 4412 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4413 peer_irk_flipped, local_irk_flipped); 4414 return true; 4415 } 4416 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4417 break; 4418 4419 default: 4420 break; 4421 } 4422 } 4423 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4424 #endif 4425 4426 // Phase 4: restore state 4427 4428 #ifdef ENABLE_LE_CENTRAL 4429 // re-start scanning 4430 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4431 hci_stack->le_scanning_active = true; 4432 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4433 return true; 4434 } 4435 #endif 4436 4437 #ifdef ENABLE_LE_CENTRAL 4438 // re-start connecting 4439 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4440 bd_addr_t null_addr; 4441 memset(null_addr, 0, 6); 4442 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4443 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4444 hci_send_cmd(&hci_le_create_connection, 4445 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4446 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4447 1, // use whitelist 4448 0, // peer address type 4449 null_addr, // peer bd addr 4450 hci_stack->le_connection_own_addr_type, // our addr type: 4451 hci_stack->le_connection_interval_min, // conn interval min 4452 hci_stack->le_connection_interval_max, // conn interval max 4453 hci_stack->le_connection_latency, // conn latency 4454 hci_stack->le_supervision_timeout, // conn latency 4455 hci_stack->le_minimum_ce_length, // min ce length 4456 hci_stack->le_maximum_ce_length // max ce length 4457 ); 4458 return true; 4459 } 4460 #endif 4461 4462 #ifdef ENABLE_LE_PERIPHERAL 4463 // re-start advertising 4464 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4465 // check if advertisements should be enabled given 4466 hci_stack->le_advertisements_active = true; 4467 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4468 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4469 return true; 4470 } 4471 #endif 4472 4473 return false; 4474 } 4475 #endif 4476 4477 static bool hci_run_general_pending_commands(void){ 4478 btstack_linked_item_t * it; 4479 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4480 hci_connection_t * connection = (hci_connection_t *) it; 4481 4482 switch(connection->state){ 4483 case SEND_CREATE_CONNECTION: 4484 switch(connection->address_type){ 4485 #ifdef ENABLE_CLASSIC 4486 case BD_ADDR_TYPE_ACL: 4487 log_info("sending hci_create_connection"); 4488 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4489 break; 4490 #endif 4491 default: 4492 #ifdef ENABLE_BLE 4493 #ifdef ENABLE_LE_CENTRAL 4494 log_info("sending hci_le_create_connection"); 4495 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4496 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4497 hci_send_cmd(&hci_le_create_connection, 4498 hci_stack->le_connection_scan_interval, // conn scan interval 4499 hci_stack->le_connection_scan_window, // conn scan windows 4500 0, // don't use whitelist 4501 connection->address_type, // peer address type 4502 connection->address, // peer bd addr 4503 hci_stack->le_connection_own_addr_type, // our addr type: 4504 hci_stack->le_connection_interval_min, // conn interval min 4505 hci_stack->le_connection_interval_max, // conn interval max 4506 hci_stack->le_connection_latency, // conn latency 4507 hci_stack->le_supervision_timeout, // conn latency 4508 hci_stack->le_minimum_ce_length, // min ce length 4509 hci_stack->le_maximum_ce_length // max ce length 4510 ); 4511 connection->state = SENT_CREATE_CONNECTION; 4512 #endif 4513 #endif 4514 break; 4515 } 4516 return true; 4517 4518 #ifdef ENABLE_CLASSIC 4519 case RECEIVED_CONNECTION_REQUEST: 4520 connection->role = HCI_ROLE_SLAVE; 4521 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4522 log_info("sending hci_accept_connection_request"); 4523 connection->state = ACCEPTED_CONNECTION_REQUEST; 4524 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4525 } 4526 return true; 4527 #endif 4528 4529 #ifdef ENABLE_BLE 4530 #ifdef ENABLE_LE_CENTRAL 4531 case SEND_CANCEL_CONNECTION: 4532 connection->state = SENT_CANCEL_CONNECTION; 4533 hci_send_cmd(&hci_le_create_connection_cancel); 4534 return true; 4535 #endif 4536 #endif 4537 case SEND_DISCONNECT: 4538 connection->state = SENT_DISCONNECT; 4539 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4540 return true; 4541 4542 default: 4543 break; 4544 } 4545 4546 // no further commands if connection is about to get shut down 4547 if (connection->state == SENT_DISCONNECT) continue; 4548 4549 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4550 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4551 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4552 return true; 4553 } 4554 4555 #ifdef ENABLE_CLASSIC 4556 4557 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4558 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4559 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4560 return true; 4561 } 4562 4563 // Handling link key request requires remote supported features 4564 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4565 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4566 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4567 4568 // lookup link key using cached key first 4569 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4570 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4571 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4572 } 4573 4574 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4575 if (have_link_key && security_level_sufficient){ 4576 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4577 } else { 4578 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4579 } 4580 return true; 4581 } 4582 4583 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4584 log_info("denying to pin request"); 4585 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4586 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4587 return true; 4588 } 4589 4590 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4591 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4592 // set authentication requirements: 4593 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4594 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4595 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4596 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4597 authreq |= 1; 4598 } 4599 bool bonding = hci_stack->bondable; 4600 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4601 // if we have received IO Cap Response, we're in responder role 4602 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4603 if (bonding && !remote_bonding){ 4604 log_info("Remote not bonding, dropping local flag"); 4605 bonding = false; 4606 } 4607 } 4608 if (bonding){ 4609 if (connection->bonding_flags & BONDING_DEDICATED){ 4610 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4611 } else { 4612 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4613 } 4614 } 4615 uint8_t have_oob_data = 0; 4616 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4617 if (connection->classic_oob_c_192 != NULL){ 4618 have_oob_data |= 1; 4619 } 4620 if (connection->classic_oob_c_256 != NULL){ 4621 have_oob_data |= 2; 4622 } 4623 #endif 4624 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4625 return true; 4626 } 4627 4628 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4629 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4630 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4631 return true; 4632 } 4633 4634 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4635 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4636 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4637 const uint8_t zero[16] = { 0 }; 4638 const uint8_t * r_192 = zero; 4639 const uint8_t * c_192 = zero; 4640 const uint8_t * r_256 = zero; 4641 const uint8_t * c_256 = zero; 4642 // verify P-256 OOB 4643 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4644 c_256 = connection->classic_oob_c_256; 4645 if (connection->classic_oob_r_256 != NULL) { 4646 r_256 = connection->classic_oob_r_256; 4647 } 4648 } 4649 // verify P-192 OOB 4650 if ((connection->classic_oob_c_192 != NULL)) { 4651 c_192 = connection->classic_oob_c_192; 4652 if (connection->classic_oob_r_192 != NULL) { 4653 r_192 = connection->classic_oob_r_192; 4654 } 4655 } 4656 4657 // assess security 4658 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4659 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4660 if (need_level_4 && !can_reach_level_4){ 4661 log_info("Level 4 required, but not possible -> abort"); 4662 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4663 // send oob negative reply 4664 c_256 = NULL; 4665 c_192 = NULL; 4666 } 4667 4668 // Reply 4669 if (c_256 != zero) { 4670 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4671 } else if (c_192 != zero){ 4672 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4673 } else { 4674 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4675 } 4676 return true; 4677 } 4678 #endif 4679 4680 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4681 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4682 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4683 return true; 4684 } 4685 4686 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4687 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4688 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4689 return true; 4690 } 4691 4692 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4693 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4694 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4695 return true; 4696 } 4697 4698 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4699 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4700 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4701 return true; 4702 } 4703 4704 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4705 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4706 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4707 return true; 4708 } 4709 4710 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4711 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4712 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4713 return true; 4714 } 4715 4716 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4717 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4718 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4719 connection->state = SENT_DISCONNECT; 4720 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4721 return true; 4722 } 4723 4724 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4725 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4726 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4727 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4728 return true; 4729 } 4730 4731 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4732 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4733 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4734 return true; 4735 } 4736 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4737 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4738 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4739 return true; 4740 } 4741 #endif 4742 4743 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4744 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4745 #ifdef ENABLE_CLASSIC 4746 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4747 #endif 4748 if (connection->state != SENT_DISCONNECT){ 4749 connection->state = SENT_DISCONNECT; 4750 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4751 return true; 4752 } 4753 } 4754 4755 #ifdef ENABLE_CLASSIC 4756 uint16_t sniff_min_interval; 4757 switch (connection->sniff_min_interval){ 4758 case 0: 4759 break; 4760 case 0xffff: 4761 connection->sniff_min_interval = 0; 4762 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4763 return true; 4764 default: 4765 sniff_min_interval = connection->sniff_min_interval; 4766 connection->sniff_min_interval = 0; 4767 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4768 return true; 4769 } 4770 4771 if (connection->sniff_subrating_max_latency != 0xffff){ 4772 uint16_t max_latency = connection->sniff_subrating_max_latency; 4773 connection->sniff_subrating_max_latency = 0; 4774 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4775 return true; 4776 } 4777 4778 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4779 uint8_t service_type = (uint8_t) connection->qos_service_type; 4780 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4781 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); 4782 return true; 4783 } 4784 4785 if (connection->request_role != HCI_ROLE_INVALID){ 4786 hci_role_t role = connection->request_role; 4787 connection->request_role = HCI_ROLE_INVALID; 4788 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4789 return true; 4790 } 4791 #endif 4792 4793 #ifdef ENABLE_BLE 4794 switch (connection->le_con_parameter_update_state){ 4795 // response to L2CAP CON PARAMETER UPDATE REQUEST 4796 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4797 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4798 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4799 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4800 0x0000, 0xffff); 4801 return true; 4802 case CON_PARAMETER_UPDATE_REPLY: 4803 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4804 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4805 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4806 0x0000, 0xffff); 4807 return true; 4808 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4809 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4810 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4811 return true; 4812 default: 4813 break; 4814 } 4815 if (connection->le_phy_update_all_phys != 0xffu){ 4816 uint8_t all_phys = connection->le_phy_update_all_phys; 4817 connection->le_phy_update_all_phys = 0xff; 4818 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); 4819 return true; 4820 } 4821 #endif 4822 } 4823 return false; 4824 } 4825 4826 static void hci_run(void){ 4827 4828 bool done; 4829 4830 // send continuation fragments first, as they block the prepared packet buffer 4831 done = hci_run_acl_fragments(); 4832 if (done) return; 4833 4834 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4835 // send host num completed packets next as they don't require num_cmd_packets > 0 4836 if (!hci_can_send_comand_packet_transport()) return; 4837 if (hci_stack->host_completed_packets){ 4838 hci_host_num_completed_packets(); 4839 return; 4840 } 4841 #endif 4842 4843 if (!hci_can_send_command_packet_now()) return; 4844 4845 // global/non-connection oriented commands 4846 4847 4848 #ifdef ENABLE_CLASSIC 4849 // general gap classic 4850 done = hci_run_general_gap_classic(); 4851 if (done) return; 4852 #endif 4853 4854 #ifdef ENABLE_BLE 4855 // general gap le 4856 done = hci_run_general_gap_le(); 4857 if (done) return; 4858 #endif 4859 4860 // send pending HCI commands 4861 done = hci_run_general_pending_commands(); 4862 if (done) return; 4863 4864 // stack state sub statemachines 4865 hci_connection_t * connection; 4866 switch (hci_stack->state){ 4867 case HCI_STATE_INITIALIZING: 4868 hci_initializing_run(); 4869 break; 4870 4871 case HCI_STATE_HALTING: 4872 4873 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4874 switch (hci_stack->substate){ 4875 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4876 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4877 4878 #ifdef ENABLE_BLE 4879 #ifdef ENABLE_LE_CENTRAL 4880 // free whitelist entries 4881 { 4882 btstack_linked_list_iterator_t lit; 4883 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4884 while (btstack_linked_list_iterator_has_next(&lit)){ 4885 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4886 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4887 btstack_memory_whitelist_entry_free(entry); 4888 } 4889 } 4890 #endif 4891 #endif 4892 // close all open connections 4893 connection = (hci_connection_t *) hci_stack->connections; 4894 if (connection){ 4895 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4896 if (!hci_can_send_command_packet_now()) return; 4897 4898 // check state 4899 if (connection->state == SENT_DISCONNECT) return; 4900 connection->state = SENT_DISCONNECT; 4901 4902 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4903 4904 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4905 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4906 4907 // ... which would be ignored anyway as we shutdown (free) the connection now 4908 hci_shutdown_connection(connection); 4909 4910 // finally, send the disconnect command 4911 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4912 return; 4913 } 4914 4915 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4916 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4917 log_info("HCI_STATE_HALTING: wait 50 ms"); 4918 hci_stack->substate = HCI_HALTING_W4_TIMER; 4919 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4920 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4921 btstack_run_loop_add_timer(&hci_stack->timeout); 4922 break; 4923 } 4924 4925 /* fall through */ 4926 4927 case HCI_HALTING_CLOSE: 4928 log_info("HCI_STATE_HALTING, calling off"); 4929 4930 // switch mode 4931 hci_power_control_off(); 4932 4933 log_info("HCI_STATE_HALTING, emitting state"); 4934 hci_emit_state(); 4935 log_info("HCI_STATE_HALTING, done"); 4936 break; 4937 4938 case HCI_HALTING_W4_TIMER: 4939 // keep waiting 4940 4941 break; 4942 default: 4943 break; 4944 } 4945 4946 break; 4947 4948 case HCI_STATE_FALLING_ASLEEP: 4949 switch(hci_stack->substate) { 4950 case HCI_FALLING_ASLEEP_DISCONNECT: 4951 log_info("HCI_STATE_FALLING_ASLEEP"); 4952 // close all open connections 4953 connection = (hci_connection_t *) hci_stack->connections; 4954 4955 #ifdef HAVE_PLATFORM_IPHONE_OS 4956 // don't close connections, if H4 supports power management 4957 if (btstack_control_iphone_power_management_enabled()){ 4958 connection = NULL; 4959 } 4960 #endif 4961 if (connection){ 4962 4963 // send disconnect 4964 if (!hci_can_send_command_packet_now()) return; 4965 4966 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4967 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4968 4969 // send disconnected event right away - causes higher layer connections to get closed, too. 4970 hci_shutdown_connection(connection); 4971 return; 4972 } 4973 4974 if (hci_classic_supported()){ 4975 // disable page and inquiry scan 4976 if (!hci_can_send_command_packet_now()) return; 4977 4978 log_info("HCI_STATE_HALTING, disabling inq scans"); 4979 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4980 4981 // continue in next sub state 4982 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4983 break; 4984 } 4985 4986 /* fall through */ 4987 4988 case HCI_FALLING_ASLEEP_COMPLETE: 4989 log_info("HCI_STATE_HALTING, calling sleep"); 4990 #ifdef HAVE_PLATFORM_IPHONE_OS 4991 // don't actually go to sleep, if H4 supports power management 4992 if (btstack_control_iphone_power_management_enabled()){ 4993 // SLEEP MODE reached 4994 hci_stack->state = HCI_STATE_SLEEPING; 4995 hci_emit_state(); 4996 break; 4997 } 4998 #endif 4999 // switch mode 5000 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5001 hci_emit_state(); 5002 break; 5003 5004 default: 5005 break; 5006 } 5007 break; 5008 5009 default: 5010 break; 5011 } 5012 } 5013 5014 int hci_send_cmd_packet(uint8_t *packet, int size){ 5015 // house-keeping 5016 5017 #ifdef ENABLE_CLASSIC 5018 bd_addr_t addr; 5019 hci_connection_t * conn; 5020 #endif 5021 #ifdef ENABLE_LE_CENTRAL 5022 uint8_t initiator_filter_policy; 5023 #endif 5024 5025 uint16_t opcode = little_endian_read_16(packet, 0); 5026 switch (opcode) { 5027 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5028 hci_stack->loopback_mode = packet[3]; 5029 break; 5030 5031 #ifdef ENABLE_CLASSIC 5032 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5033 reverse_bd_addr(&packet[3], addr); 5034 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5035 5036 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5037 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5038 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5039 return -1; 5040 } 5041 5042 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5043 if (!conn) { 5044 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5045 if (!conn) { 5046 // notify client that alloc failed 5047 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5048 return -1; // packet not sent to controller 5049 } 5050 conn->state = SEND_CREATE_CONNECTION; 5051 conn->role = HCI_ROLE_MASTER; 5052 } 5053 log_info("conn state %u", conn->state); 5054 switch (conn->state) { 5055 // if connection active exists 5056 case OPEN: 5057 // and OPEN, emit connection complete command 5058 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5059 return -1; // packet not sent to controller 5060 case RECEIVED_DISCONNECTION_COMPLETE: 5061 // create connection triggered in disconnect complete event, let's do it now 5062 break; 5063 case SEND_CREATE_CONNECTION: 5064 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5065 break; 5066 default: 5067 // otherwise, just ignore as it is already in the open process 5068 return -1; // packet not sent to controller 5069 } 5070 conn->state = SENT_CREATE_CONNECTION; 5071 5072 // track outgoing connection 5073 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5074 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5075 break; 5076 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5077 if (hci_stack->link_key_db) { 5078 reverse_bd_addr(&packet[3], addr); 5079 hci_stack->link_key_db->delete_link_key(addr); 5080 } 5081 break; 5082 5083 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5084 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5085 // setup_synchronous_connection? Voice setting at offset 22 5086 // TODO: compare to current setting if sco connection already active 5087 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5088 break; 5089 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5090 // accept_synchronus_connection? Voice setting at offset 18 5091 // TODO: compare to current setting if sco connection already active 5092 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5093 break; 5094 #endif 5095 #endif 5096 5097 #ifdef ENABLE_BLE 5098 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5099 hci_stack->le_random_address_set = 1; 5100 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5101 break; 5102 #ifdef ENABLE_LE_PERIPHERAL 5103 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5104 hci_stack->le_advertisements_active = packet[3] != 0; 5105 break; 5106 #endif 5107 #ifdef ENABLE_LE_CENTRAL 5108 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5109 // white list used? 5110 initiator_filter_policy = packet[7]; 5111 switch (initiator_filter_policy) { 5112 case 0: 5113 // whitelist not used 5114 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5115 break; 5116 case 1: 5117 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5118 break; 5119 default: 5120 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5121 break; 5122 } 5123 // track outgoing connection 5124 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5125 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5126 break; 5127 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5128 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5129 break; 5130 #endif 5131 #endif 5132 default: 5133 break; 5134 } 5135 5136 hci_stack->num_cmd_packets--; 5137 5138 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5139 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5140 } 5141 5142 // disconnect because of security block 5143 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5144 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5145 if (!connection) return; 5146 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5147 } 5148 5149 5150 // Configure Secure Simple Pairing 5151 5152 #ifdef ENABLE_CLASSIC 5153 5154 // enable will enable SSP during init 5155 void gap_ssp_set_enable(int enable){ 5156 hci_stack->ssp_enable = enable; 5157 } 5158 5159 static int hci_local_ssp_activated(void){ 5160 return gap_ssp_supported() && hci_stack->ssp_enable; 5161 } 5162 5163 // if set, BTstack will respond to io capability request using authentication requirement 5164 void gap_ssp_set_io_capability(int io_capability){ 5165 hci_stack->ssp_io_capability = io_capability; 5166 } 5167 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5168 hci_stack->ssp_authentication_requirement = authentication_requirement; 5169 } 5170 5171 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5172 void gap_ssp_set_auto_accept(int auto_accept){ 5173 hci_stack->ssp_auto_accept = auto_accept; 5174 } 5175 5176 void gap_secure_connections_enable(bool enable){ 5177 hci_stack->secure_connections_enable = enable; 5178 } 5179 5180 #endif 5181 5182 // va_list part of hci_send_cmd 5183 int hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5184 if (!hci_can_send_command_packet_now()){ 5185 log_error("hci_send_cmd called but cannot send packet now"); 5186 return 0; 5187 } 5188 5189 // for HCI INITIALIZATION 5190 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5191 hci_stack->last_cmd_opcode = cmd->opcode; 5192 5193 hci_reserve_packet_buffer(); 5194 uint8_t * packet = hci_stack->hci_packet_buffer; 5195 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5196 int err = hci_send_cmd_packet(packet, size); 5197 5198 // release packet buffer on error or for synchronous transport implementations 5199 if ((err < 0) || hci_transport_synchronous()){ 5200 hci_release_packet_buffer(); 5201 hci_emit_transport_packet_sent(); 5202 } 5203 5204 return err; 5205 } 5206 5207 /** 5208 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5209 */ 5210 int hci_send_cmd(const hci_cmd_t * cmd, ...){ 5211 va_list argptr; 5212 va_start(argptr, cmd); 5213 int res = hci_send_cmd_va_arg(cmd, argptr); 5214 va_end(argptr); 5215 return res; 5216 } 5217 5218 // Create various non-HCI events. 5219 // TODO: generalize, use table similar to hci_create_command 5220 5221 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5222 // dump packet 5223 if (dump) { 5224 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5225 } 5226 5227 // dispatch to all event handlers 5228 btstack_linked_list_iterator_t it; 5229 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5230 while (btstack_linked_list_iterator_has_next(&it)){ 5231 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5232 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5233 } 5234 } 5235 5236 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5237 if (!hci_stack->acl_packet_handler) return; 5238 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5239 } 5240 5241 #ifdef ENABLE_CLASSIC 5242 static void hci_notify_if_sco_can_send_now(void){ 5243 // notify SCO sender if waiting 5244 if (!hci_stack->sco_waiting_for_can_send_now) return; 5245 if (hci_can_send_sco_packet_now()){ 5246 hci_stack->sco_waiting_for_can_send_now = 0; 5247 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5248 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5249 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5250 } 5251 } 5252 5253 // parsing end emitting has been merged to reduce code size 5254 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5255 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5256 5257 uint8_t * eir_data; 5258 ad_context_t context; 5259 const uint8_t * name; 5260 uint8_t name_len; 5261 5262 if (size < 3) return; 5263 5264 int event_type = hci_event_packet_get_type(packet); 5265 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5266 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5267 5268 switch (event_type){ 5269 case HCI_EVENT_INQUIRY_RESULT: 5270 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5271 if (size != (3 + (num_responses * 14))) return; 5272 break; 5273 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5274 if (size != 257) return; 5275 if (num_responses != 1) return; 5276 break; 5277 default: 5278 return; 5279 } 5280 5281 // event[1] is set at the end 5282 int i; 5283 for (i=0; i<num_responses;i++){ 5284 memset(event, 0, sizeof(event)); 5285 event[0] = GAP_EVENT_INQUIRY_RESULT; 5286 uint8_t event_size = 27; // if name is not set by EIR 5287 5288 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5289 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5290 (void)memcpy(&event[9], 5291 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5292 3); // class of device 5293 (void)memcpy(&event[12], 5294 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5295 2); // clock offset 5296 5297 switch (event_type){ 5298 case HCI_EVENT_INQUIRY_RESULT: 5299 // 14,15,16,17 = 0, size 18 5300 break; 5301 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5302 event[14] = 1; 5303 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5304 // 16,17 = 0, size 18 5305 break; 5306 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5307 event[14] = 1; 5308 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5309 // EIR packets only contain a single inquiry response 5310 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5311 name = NULL; 5312 // Iterate over EIR data 5313 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5314 uint8_t data_type = ad_iterator_get_data_type(&context); 5315 uint8_t data_size = ad_iterator_get_data_len(&context); 5316 const uint8_t * data = ad_iterator_get_data(&context); 5317 // Prefer Complete Local Name over Shortened Local Name 5318 switch (data_type){ 5319 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5320 if (name) continue; 5321 /* fall through */ 5322 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5323 name = data; 5324 name_len = data_size; 5325 break; 5326 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5327 if (data_size != 8) break; 5328 event[16] = 1; 5329 memcpy(&event[17], data, 8); 5330 break; 5331 default: 5332 break; 5333 } 5334 } 5335 if (name){ 5336 event[25] = 1; 5337 // truncate name if needed 5338 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5339 event[26] = len; 5340 (void)memcpy(&event[27], name, len); 5341 event_size += len; 5342 } 5343 break; 5344 default: 5345 return; 5346 } 5347 event[1] = event_size - 2; 5348 hci_emit_event(event, event_size, 1); 5349 } 5350 } 5351 #endif 5352 5353 void hci_emit_state(void){ 5354 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5355 uint8_t event[3]; 5356 event[0] = BTSTACK_EVENT_STATE; 5357 event[1] = sizeof(event) - 2u; 5358 event[2] = hci_stack->state; 5359 hci_emit_event(event, sizeof(event), 1); 5360 } 5361 5362 #ifdef ENABLE_CLASSIC 5363 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5364 uint8_t event[13]; 5365 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5366 event[1] = sizeof(event) - 2; 5367 event[2] = status; 5368 little_endian_store_16(event, 3, con_handle); 5369 reverse_bd_addr(address, &event[5]); 5370 event[11] = 1; // ACL connection 5371 event[12] = 0; // encryption disabled 5372 hci_emit_event(event, sizeof(event), 1); 5373 } 5374 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5375 if (disable_l2cap_timeouts) return; 5376 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5377 uint8_t event[4]; 5378 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5379 event[1] = sizeof(event) - 2; 5380 little_endian_store_16(event, 2, conn->con_handle); 5381 hci_emit_event(event, sizeof(event), 1); 5382 } 5383 #endif 5384 5385 #ifdef ENABLE_BLE 5386 #ifdef ENABLE_LE_CENTRAL 5387 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){ 5388 uint8_t event[21]; 5389 event[0] = HCI_EVENT_LE_META; 5390 event[1] = sizeof(event) - 2u; 5391 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5392 event[3] = status; 5393 little_endian_store_16(event, 4, con_handle); 5394 event[6] = 0; // TODO: role 5395 event[7] = address_type; 5396 reverse_bd_addr(address, &event[8]); 5397 little_endian_store_16(event, 14, 0); // interval 5398 little_endian_store_16(event, 16, 0); // latency 5399 little_endian_store_16(event, 18, 0); // supervision timeout 5400 event[20] = 0; // master clock accuracy 5401 hci_emit_event(event, sizeof(event), 1); 5402 } 5403 #endif 5404 #endif 5405 5406 static void hci_emit_transport_packet_sent(void){ 5407 // notify upper stack that it might be possible to send again 5408 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5409 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5410 } 5411 5412 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5413 uint8_t event[6]; 5414 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5415 event[1] = sizeof(event) - 2u; 5416 event[2] = 0; // status = OK 5417 little_endian_store_16(event, 3, con_handle); 5418 event[5] = reason; 5419 hci_emit_event(event, sizeof(event), 1); 5420 } 5421 5422 static void hci_emit_nr_connections_changed(void){ 5423 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5424 uint8_t event[3]; 5425 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5426 event[1] = sizeof(event) - 2u; 5427 event[2] = nr_hci_connections(); 5428 hci_emit_event(event, sizeof(event), 1); 5429 } 5430 5431 static void hci_emit_hci_open_failed(void){ 5432 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5433 uint8_t event[2]; 5434 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5435 event[1] = sizeof(event) - 2u; 5436 hci_emit_event(event, sizeof(event), 1); 5437 } 5438 5439 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5440 log_info("hci_emit_dedicated_bonding_result %u ", status); 5441 uint8_t event[9]; 5442 int pos = 0; 5443 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5444 event[pos++] = sizeof(event) - 2u; 5445 event[pos++] = status; 5446 reverse_bd_addr(address, &event[pos]); 5447 hci_emit_event(event, sizeof(event), 1); 5448 } 5449 5450 5451 #ifdef ENABLE_CLASSIC 5452 5453 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5454 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5455 uint8_t event[5]; 5456 int pos = 0; 5457 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5458 event[pos++] = sizeof(event) - 2; 5459 little_endian_store_16(event, 2, con_handle); 5460 pos += 2; 5461 event[pos++] = level; 5462 hci_emit_event(event, sizeof(event), 1); 5463 } 5464 5465 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5466 if (!connection) return LEVEL_0; 5467 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5468 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5469 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5470 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5471 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5472 // LEVEL 4 always requires 128 bit encrytion key size 5473 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5474 security_level = LEVEL_3; 5475 } 5476 return security_level; 5477 } 5478 5479 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5480 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5481 uint8_t event[3]; 5482 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5483 event[1] = sizeof(event) - 2; 5484 event[2] = enabled; 5485 hci_emit_event(event, sizeof(event), 1); 5486 } 5487 5488 // query if remote side supports eSCO 5489 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5490 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5491 if (!connection) return 0; 5492 return (connection->remote_supported_features[0] & 1) != 0; 5493 } 5494 5495 static bool hci_ssp_supported(hci_connection_t * connection){ 5496 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5497 return (connection->bonding_flags & mask) == mask; 5498 } 5499 5500 // query if remote side supports SSP 5501 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5502 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5503 if (!connection) return 0; 5504 return hci_ssp_supported(connection) ? 1 : 0; 5505 } 5506 5507 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5508 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5509 } 5510 5511 // GAP API 5512 /** 5513 * @bbrief enable/disable bonding. default is enabled 5514 * @praram enabled 5515 */ 5516 void gap_set_bondable_mode(int enable){ 5517 hci_stack->bondable = enable ? 1 : 0; 5518 } 5519 /** 5520 * @brief Get bondable mode. 5521 * @return 1 if bondable 5522 */ 5523 int gap_get_bondable_mode(void){ 5524 return hci_stack->bondable; 5525 } 5526 5527 /** 5528 * @brief map link keys to security levels 5529 */ 5530 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5531 switch (link_key_type){ 5532 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5533 return LEVEL_4; 5534 case COMBINATION_KEY: 5535 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5536 return LEVEL_3; 5537 default: 5538 return LEVEL_2; 5539 } 5540 } 5541 5542 /** 5543 * @brief map link keys to secure connection yes/no 5544 */ 5545 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5546 switch (link_key_type){ 5547 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5548 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5549 return 1; 5550 default: 5551 return 0; 5552 } 5553 } 5554 5555 /** 5556 * @brief map link keys to authenticated 5557 */ 5558 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5559 switch (link_key_type){ 5560 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5561 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5562 return 1; 5563 default: 5564 return 0; 5565 } 5566 } 5567 5568 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5569 log_info("gap_mitm_protection_required_for_security_level %u", level); 5570 return level > LEVEL_2; 5571 } 5572 5573 /** 5574 * @brief get current security level 5575 */ 5576 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5577 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5578 if (!connection) return LEVEL_0; 5579 return gap_security_level_for_connection(connection); 5580 } 5581 5582 /** 5583 * @brief request connection to device to 5584 * @result GAP_AUTHENTICATION_RESULT 5585 */ 5586 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5587 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5588 if (!connection){ 5589 hci_emit_security_level(con_handle, LEVEL_0); 5590 return; 5591 } 5592 5593 btstack_assert(hci_is_le_connection(connection) == false); 5594 5595 // 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) 5596 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5597 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5598 requested_level = LEVEL_4; 5599 } 5600 5601 gap_security_level_t current_level = gap_security_level(con_handle); 5602 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5603 requested_level, connection->requested_security_level, current_level); 5604 5605 // authentication active if authentication request was sent or planned level > 0 5606 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5607 if (authentication_active){ 5608 // authentication already active 5609 if (connection->requested_security_level < requested_level){ 5610 // increase requested level as new level is higher 5611 // TODO: handle re-authentication when done 5612 connection->requested_security_level = requested_level; 5613 } 5614 } else { 5615 // no request active, notify if security sufficient 5616 if (requested_level <= current_level){ 5617 hci_emit_security_level(con_handle, current_level); 5618 return; 5619 } 5620 5621 // store request 5622 connection->requested_security_level = requested_level; 5623 5624 // start to authenticate connection 5625 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5626 hci_run(); 5627 } 5628 } 5629 5630 /** 5631 * @brief start dedicated bonding with device. disconnect after bonding 5632 * @param device 5633 * @param request MITM protection 5634 * @result GAP_DEDICATED_BONDING_COMPLETE 5635 */ 5636 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5637 5638 // create connection state machine 5639 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5640 5641 if (!connection){ 5642 return BTSTACK_MEMORY_ALLOC_FAILED; 5643 } 5644 5645 // delete linkn key 5646 gap_drop_link_key_for_bd_addr(device); 5647 5648 // configure LEVEL_2/3, dedicated bonding 5649 connection->state = SEND_CREATE_CONNECTION; 5650 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5651 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5652 connection->bonding_flags = BONDING_DEDICATED; 5653 5654 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5655 5656 // handle: connnection failure (connection complete != ok) 5657 // handle: authentication failure 5658 // handle: disconnect on done 5659 5660 hci_run(); 5661 5662 return 0; 5663 } 5664 #endif 5665 5666 void gap_set_local_name(const char * local_name){ 5667 hci_stack->local_name = local_name; 5668 } 5669 5670 5671 #ifdef ENABLE_BLE 5672 5673 #ifdef ENABLE_LE_CENTRAL 5674 void gap_start_scan(void){ 5675 hci_stack->le_scanning_enabled = true; 5676 hci_run(); 5677 } 5678 5679 void gap_stop_scan(void){ 5680 hci_stack->le_scanning_enabled = false; 5681 hci_run(); 5682 } 5683 5684 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5685 hci_stack->le_scan_type = scan_type; 5686 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5687 hci_stack->le_scan_interval = scan_interval; 5688 hci_stack->le_scan_window = scan_window; 5689 hci_stack->le_scanning_param_update = true; 5690 hci_run(); 5691 } 5692 5693 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5694 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5695 } 5696 5697 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5698 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5699 if (!conn){ 5700 // disallow if le connection is already outgoing 5701 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5702 log_error("le connection already active"); 5703 return ERROR_CODE_COMMAND_DISALLOWED; 5704 } 5705 5706 log_info("gap_connect: no connection exists yet, creating context"); 5707 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5708 if (!conn){ 5709 // notify client that alloc failed 5710 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5711 log_info("gap_connect: failed to alloc hci_connection_t"); 5712 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5713 } 5714 5715 // set le connecting state 5716 if (hci_is_le_connection_type(addr_type)){ 5717 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5718 } 5719 5720 conn->state = SEND_CREATE_CONNECTION; 5721 log_info("gap_connect: send create connection next"); 5722 hci_run(); 5723 return ERROR_CODE_SUCCESS; 5724 } 5725 5726 if (!hci_is_le_connection(conn) || 5727 (conn->state == SEND_CREATE_CONNECTION) || 5728 (conn->state == SENT_CREATE_CONNECTION)) { 5729 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5730 log_error("gap_connect: classic connection or connect is already being created"); 5731 return GATT_CLIENT_IN_WRONG_STATE; 5732 } 5733 5734 // check if connection was just disconnected 5735 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5736 log_info("gap_connect: send create connection (again)"); 5737 conn->state = SEND_CREATE_CONNECTION; 5738 hci_run(); 5739 return ERROR_CODE_SUCCESS; 5740 } 5741 5742 log_info("gap_connect: context exists with state %u", conn->state); 5743 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5744 hci_run(); 5745 return ERROR_CODE_SUCCESS; 5746 } 5747 5748 // @assumption: only a single outgoing LE Connection exists 5749 static hci_connection_t * gap_get_outgoing_connection(void){ 5750 btstack_linked_item_t *it; 5751 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5752 hci_connection_t * conn = (hci_connection_t *) it; 5753 if (!hci_is_le_connection(conn)) continue; 5754 switch (conn->state){ 5755 case SEND_CREATE_CONNECTION: 5756 case SENT_CREATE_CONNECTION: 5757 case SENT_CANCEL_CONNECTION: 5758 return conn; 5759 default: 5760 break; 5761 }; 5762 } 5763 return NULL; 5764 } 5765 5766 uint8_t gap_connect_cancel(void){ 5767 hci_connection_t * conn = gap_get_outgoing_connection(); 5768 if (!conn) return 0; 5769 switch (conn->state){ 5770 case SEND_CREATE_CONNECTION: 5771 // skip sending create connection and emit event instead 5772 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5773 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5774 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5775 btstack_memory_hci_connection_free( conn ); 5776 break; 5777 case SENT_CREATE_CONNECTION: 5778 // request to send cancel connection 5779 conn->state = SEND_CANCEL_CONNECTION; 5780 hci_run(); 5781 break; 5782 default: 5783 break; 5784 } 5785 return 0; 5786 } 5787 #endif 5788 5789 #ifdef ENABLE_LE_CENTRAL 5790 /** 5791 * @brief Set connection parameters for outgoing connections 5792 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5793 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5794 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5795 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5796 * @param conn_latency, default: 4 5797 * @param supervision_timeout (unit: 10ms), default: 720 ms 5798 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5799 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5800 */ 5801 5802 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5803 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5804 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5805 hci_stack->le_connection_scan_interval = conn_scan_interval; 5806 hci_stack->le_connection_scan_window = conn_scan_window; 5807 hci_stack->le_connection_interval_min = conn_interval_min; 5808 hci_stack->le_connection_interval_max = conn_interval_max; 5809 hci_stack->le_connection_latency = conn_latency; 5810 hci_stack->le_supervision_timeout = supervision_timeout; 5811 hci_stack->le_minimum_ce_length = min_ce_length; 5812 hci_stack->le_maximum_ce_length = max_ce_length; 5813 } 5814 #endif 5815 5816 /** 5817 * @brief Updates the connection parameters for a given LE connection 5818 * @param handle 5819 * @param conn_interval_min (unit: 1.25ms) 5820 * @param conn_interval_max (unit: 1.25ms) 5821 * @param conn_latency 5822 * @param supervision_timeout (unit: 10ms) 5823 * @returns 0 if ok 5824 */ 5825 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5826 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5827 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5828 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5829 connection->le_conn_interval_min = conn_interval_min; 5830 connection->le_conn_interval_max = conn_interval_max; 5831 connection->le_conn_latency = conn_latency; 5832 connection->le_supervision_timeout = supervision_timeout; 5833 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5834 hci_run(); 5835 return 0; 5836 } 5837 5838 /** 5839 * @brief Request an update of the connection parameter for a given LE connection 5840 * @param handle 5841 * @param conn_interval_min (unit: 1.25ms) 5842 * @param conn_interval_max (unit: 1.25ms) 5843 * @param conn_latency 5844 * @param supervision_timeout (unit: 10ms) 5845 * @returns 0 if ok 5846 */ 5847 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5848 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5849 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5850 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5851 connection->le_conn_interval_min = conn_interval_min; 5852 connection->le_conn_interval_max = conn_interval_max; 5853 connection->le_conn_latency = conn_latency; 5854 connection->le_supervision_timeout = supervision_timeout; 5855 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5856 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5857 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5858 return 0; 5859 } 5860 5861 #ifdef ENABLE_LE_PERIPHERAL 5862 5863 /** 5864 * @brief Set Advertisement Data 5865 * @param advertising_data_length 5866 * @param advertising_data (max 31 octets) 5867 * @note data is not copied, pointer has to stay valid 5868 */ 5869 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5870 hci_stack->le_advertisements_data_len = advertising_data_length; 5871 hci_stack->le_advertisements_data = advertising_data; 5872 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5873 hci_run(); 5874 } 5875 5876 /** 5877 * @brief Set Scan Response Data 5878 * @param advertising_data_length 5879 * @param advertising_data (max 31 octets) 5880 * @note data is not copied, pointer has to stay valid 5881 */ 5882 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5883 hci_stack->le_scan_response_data_len = scan_response_data_length; 5884 hci_stack->le_scan_response_data = scan_response_data; 5885 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5886 hci_run(); 5887 } 5888 5889 /** 5890 * @brief Set Advertisement Parameters 5891 * @param adv_int_min 5892 * @param adv_int_max 5893 * @param adv_type 5894 * @param direct_address_type 5895 * @param direct_address 5896 * @param channel_map 5897 * @param filter_policy 5898 * 5899 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5900 */ 5901 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5902 uint8_t direct_address_typ, bd_addr_t direct_address, 5903 uint8_t channel_map, uint8_t filter_policy) { 5904 5905 hci_stack->le_advertisements_interval_min = adv_int_min; 5906 hci_stack->le_advertisements_interval_max = adv_int_max; 5907 hci_stack->le_advertisements_type = adv_type; 5908 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5909 hci_stack->le_advertisements_channel_map = channel_map; 5910 hci_stack->le_advertisements_filter_policy = filter_policy; 5911 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5912 6); 5913 5914 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 5915 hci_run(); 5916 } 5917 5918 /** 5919 * @brief Enable/Disable Advertisements 5920 * @param enabled 5921 */ 5922 void gap_advertisements_enable(int enabled){ 5923 hci_stack->le_advertisements_enabled = enabled != 0; 5924 hci_update_advertisements_enabled_for_current_roles(); 5925 hci_run(); 5926 } 5927 5928 #endif 5929 5930 void hci_le_set_own_address_type(uint8_t own_address_type){ 5931 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5932 if (own_address_type == hci_stack->le_own_addr_type) return; 5933 hci_stack->le_own_addr_type = own_address_type; 5934 5935 #ifdef ENABLE_LE_PERIPHERAL 5936 // update advertisement parameters, too 5937 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5938 hci_run(); 5939 #endif 5940 #ifdef ENABLE_LE_CENTRAL 5941 // note: we don't update scan parameters or modify ongoing connection attempts 5942 #endif 5943 } 5944 5945 #endif 5946 5947 uint8_t gap_disconnect(hci_con_handle_t handle){ 5948 hci_connection_t * conn = hci_connection_for_handle(handle); 5949 if (!conn){ 5950 hci_emit_disconnection_complete(handle, 0); 5951 return 0; 5952 } 5953 // ignore if already disconnected 5954 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5955 return 0; 5956 } 5957 conn->state = SEND_DISCONNECT; 5958 hci_run(); 5959 return 0; 5960 } 5961 5962 int gap_read_rssi(hci_con_handle_t con_handle){ 5963 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5964 if (hci_connection == NULL) return 0; 5965 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 5966 hci_run(); 5967 return 1; 5968 } 5969 5970 /** 5971 * @brief Get connection type 5972 * @param con_handle 5973 * @result connection_type 5974 */ 5975 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5976 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5977 if (!conn) return GAP_CONNECTION_INVALID; 5978 switch (conn->address_type){ 5979 case BD_ADDR_TYPE_LE_PUBLIC: 5980 case BD_ADDR_TYPE_LE_RANDOM: 5981 return GAP_CONNECTION_LE; 5982 case BD_ADDR_TYPE_SCO: 5983 return GAP_CONNECTION_SCO; 5984 case BD_ADDR_TYPE_ACL: 5985 return GAP_CONNECTION_ACL; 5986 default: 5987 return GAP_CONNECTION_INVALID; 5988 } 5989 } 5990 5991 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5992 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5993 if (!conn) return HCI_ROLE_INVALID; 5994 return (hci_role_t) conn->role; 5995 } 5996 5997 5998 #ifdef ENABLE_CLASSIC 5999 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6000 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6001 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6002 conn->request_role = role; 6003 hci_run(); 6004 return ERROR_CODE_SUCCESS; 6005 } 6006 #endif 6007 6008 #ifdef ENABLE_BLE 6009 6010 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){ 6011 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6012 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6013 6014 conn->le_phy_update_all_phys = all_phys; 6015 conn->le_phy_update_tx_phys = tx_phys; 6016 conn->le_phy_update_rx_phys = rx_phys; 6017 conn->le_phy_update_phy_options = phy_options; 6018 6019 hci_run(); 6020 6021 return 0; 6022 } 6023 6024 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6025 // check if already in list 6026 btstack_linked_list_iterator_t it; 6027 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6028 while (btstack_linked_list_iterator_has_next(&it)) { 6029 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6030 if (entry->address_type != address_type) { 6031 continue; 6032 } 6033 if (memcmp(entry->address, address, 6) != 0) { 6034 continue; 6035 } 6036 // disallow if already scheduled to add 6037 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6038 return ERROR_CODE_COMMAND_DISALLOWED; 6039 } 6040 // still on controller, but scheduled to remove -> re-add 6041 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6042 return ERROR_CODE_SUCCESS; 6043 } 6044 // alloc and add to list 6045 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6046 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6047 entry->address_type = address_type; 6048 (void)memcpy(entry->address, address, 6); 6049 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6050 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6051 return ERROR_CODE_SUCCESS; 6052 } 6053 6054 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6055 btstack_linked_list_iterator_t it; 6056 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6057 while (btstack_linked_list_iterator_has_next(&it)){ 6058 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6059 if (entry->address_type != address_type) { 6060 continue; 6061 } 6062 if (memcmp(entry->address, address, 6) != 0) { 6063 continue; 6064 } 6065 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6066 // remove from controller if already present 6067 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6068 } else { 6069 // directly remove entry from whitelist 6070 btstack_linked_list_iterator_remove(&it); 6071 btstack_memory_whitelist_entry_free(entry); 6072 } 6073 return ERROR_CODE_SUCCESS; 6074 } 6075 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6076 } 6077 6078 static void hci_whitelist_clear(void){ 6079 btstack_linked_list_iterator_t it; 6080 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6081 while (btstack_linked_list_iterator_has_next(&it)){ 6082 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6083 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6084 // remove from controller if already present 6085 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6086 continue; 6087 } 6088 // directly remove entry from whitelist 6089 btstack_linked_list_iterator_remove(&it); 6090 btstack_memory_whitelist_entry_free(entry); 6091 } 6092 } 6093 6094 /** 6095 * @brief Clear Whitelist 6096 * @returns 0 if ok 6097 */ 6098 uint8_t gap_whitelist_clear(void){ 6099 hci_whitelist_clear(); 6100 hci_run(); 6101 return ERROR_CODE_SUCCESS; 6102 } 6103 6104 /** 6105 * @brief Add Device to Whitelist 6106 * @param address_typ 6107 * @param address 6108 * @returns 0 if ok 6109 */ 6110 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6111 uint8_t status = hci_whitelist_add(address_type, address); 6112 if (status){ 6113 return status; 6114 } 6115 hci_run(); 6116 return ERROR_CODE_SUCCESS; 6117 } 6118 6119 /** 6120 * @brief Remove Device from Whitelist 6121 * @param address_typ 6122 * @param address 6123 * @returns 0 if ok 6124 */ 6125 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6126 uint8_t status = hci_whitelist_remove(address_type, address); 6127 if (status){ 6128 return status; 6129 } 6130 hci_run(); 6131 return ERROR_CODE_SUCCESS; 6132 } 6133 6134 #ifdef ENABLE_LE_CENTRAL 6135 /** 6136 * @brief Connect with Whitelist 6137 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6138 * @returns - if ok 6139 */ 6140 uint8_t gap_connect_with_whitelist(void){ 6141 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6142 return ERROR_CODE_COMMAND_DISALLOWED; 6143 } 6144 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6145 hci_run(); 6146 return ERROR_CODE_SUCCESS; 6147 } 6148 6149 /** 6150 * @brief Auto Connection Establishment - Start Connecting to device 6151 * @param address_typ 6152 * @param address 6153 * @returns 0 if ok 6154 */ 6155 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6156 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6157 return ERROR_CODE_COMMAND_DISALLOWED; 6158 } 6159 6160 uint8_t status = hci_whitelist_add(address_type, address); 6161 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6162 return status; 6163 } 6164 6165 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6166 6167 hci_run(); 6168 return ERROR_CODE_SUCCESS; 6169 } 6170 6171 /** 6172 * @brief Auto Connection Establishment - Stop Connecting to device 6173 * @param address_typ 6174 * @param address 6175 * @returns 0 if ok 6176 */ 6177 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6178 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6179 return ERROR_CODE_COMMAND_DISALLOWED; 6180 } 6181 6182 hci_whitelist_remove(address_type, address); 6183 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6184 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6185 } 6186 hci_run(); 6187 return 0; 6188 } 6189 6190 /** 6191 * @brief Auto Connection Establishment - Stop everything 6192 * @note Convenience function to stop all active auto connection attempts 6193 */ 6194 uint8_t gap_auto_connection_stop_all(void){ 6195 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6196 return ERROR_CODE_COMMAND_DISALLOWED; 6197 } 6198 hci_whitelist_clear(); 6199 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6200 hci_run(); 6201 return ERROR_CODE_SUCCESS; 6202 } 6203 6204 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6205 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6206 if (!conn) return 0; 6207 return conn->le_connection_interval; 6208 } 6209 #endif 6210 #endif 6211 6212 #ifdef ENABLE_CLASSIC 6213 /** 6214 * @brief Set Extended Inquiry Response data 6215 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6216 * @note has to be done before stack starts up 6217 */ 6218 void gap_set_extended_inquiry_response(const uint8_t * data){ 6219 hci_stack->eir_data = data; 6220 } 6221 6222 /** 6223 * @brief Start GAP Classic Inquiry 6224 * @param duration in 1.28s units 6225 * @return 0 if ok 6226 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6227 */ 6228 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6229 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6230 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6231 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6232 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6233 } 6234 hci_stack->inquiry_state = duration_in_1280ms_units; 6235 hci_run(); 6236 return 0; 6237 } 6238 6239 /** 6240 * @brief Stop GAP Classic Inquiry 6241 * @returns 0 if ok 6242 */ 6243 int gap_inquiry_stop(void){ 6244 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6245 // emit inquiry complete event, before it even started 6246 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6247 hci_emit_event(event, sizeof(event), 1); 6248 return 0; 6249 } 6250 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6251 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6252 hci_run(); 6253 return 0; 6254 } 6255 6256 void gap_inquiry_set_lap(uint32_t lap){ 6257 hci_stack->inquiry_lap = lap; 6258 } 6259 6260 6261 /** 6262 * @brief Remote Name Request 6263 * @param addr 6264 * @param page_scan_repetition_mode 6265 * @param clock_offset only used when bit 15 is set 6266 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6267 */ 6268 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6269 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6270 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6271 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6272 hci_stack->remote_name_clock_offset = clock_offset; 6273 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6274 hci_run(); 6275 return 0; 6276 } 6277 6278 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6279 hci_stack->gap_pairing_state = state; 6280 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6281 hci_run(); 6282 return 0; 6283 } 6284 6285 /** 6286 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6287 * @param addr 6288 * @param pin_data 6289 * @param pin_len 6290 * @return 0 if ok 6291 */ 6292 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6293 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6294 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6295 hci_stack->gap_pairing_pin_len = pin_len; 6296 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6297 } 6298 6299 /** 6300 * @brief Legacy Pairing Pin Code Response 6301 * @param addr 6302 * @param pin 6303 * @return 0 if ok 6304 */ 6305 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6306 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6307 } 6308 6309 /** 6310 * @brief Abort Legacy Pairing 6311 * @param addr 6312 * @param pin 6313 * @return 0 if ok 6314 */ 6315 int gap_pin_code_negative(bd_addr_t addr){ 6316 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6317 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6318 } 6319 6320 /** 6321 * @brief SSP Passkey Response 6322 * @param addr 6323 * @param passkey 6324 * @return 0 if ok 6325 */ 6326 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6327 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6328 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6329 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6330 } 6331 6332 /** 6333 * @brief Abort SSP Passkey Entry/Pairing 6334 * @param addr 6335 * @param pin 6336 * @return 0 if ok 6337 */ 6338 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6339 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6340 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6341 } 6342 6343 /** 6344 * @brief Accept SSP Numeric Comparison 6345 * @param addr 6346 * @param passkey 6347 * @return 0 if ok 6348 */ 6349 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6350 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6351 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6352 } 6353 6354 /** 6355 * @brief Abort SSP Numeric Comparison/Pairing 6356 * @param addr 6357 * @param pin 6358 * @return 0 if ok 6359 */ 6360 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6361 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6362 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6363 } 6364 6365 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6366 6367 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6368 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6369 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6370 connectionSetAuthenticationFlags(conn, flag); 6371 hci_run(); 6372 return ERROR_CODE_SUCCESS; 6373 } 6374 6375 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6376 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6377 } 6378 6379 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6380 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6381 } 6382 #endif 6383 6384 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6385 /** 6386 * @brief Report Remote OOB Data 6387 * @param bd_addr 6388 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6389 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6390 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6391 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6392 */ 6393 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){ 6394 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6395 if (connection == NULL) { 6396 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6397 } 6398 connection->classic_oob_c_192 = c_192; 6399 connection->classic_oob_r_192 = r_192; 6400 connection->classic_oob_c_256 = c_256; 6401 connection->classic_oob_r_256 = r_256; 6402 return ERROR_CODE_SUCCESS; 6403 } 6404 /** 6405 * @brief Generate new OOB data 6406 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6407 */ 6408 void gap_ssp_generate_oob_data(void){ 6409 hci_stack->classic_read_local_oob_data = true; 6410 hci_run(); 6411 } 6412 6413 #endif 6414 6415 /** 6416 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6417 * @param inquiry_mode see bluetooth_defines.h 6418 */ 6419 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6420 hci_stack->inquiry_mode = inquiry_mode; 6421 } 6422 6423 /** 6424 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6425 */ 6426 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6427 hci_stack->sco_voice_setting = voice_setting; 6428 } 6429 6430 /** 6431 * @brief Get SCO Voice Setting 6432 * @return current voice setting 6433 */ 6434 uint16_t hci_get_sco_voice_setting(void){ 6435 return hci_stack->sco_voice_setting; 6436 } 6437 6438 static int hci_have_usb_transport(void){ 6439 if (!hci_stack->hci_transport) return 0; 6440 const char * transport_name = hci_stack->hci_transport->name; 6441 if (!transport_name) return 0; 6442 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6443 } 6444 6445 /** @brief Get SCO packet length for current SCO Voice setting 6446 * @note Using SCO packets of the exact length is required for USB transfer 6447 * @return Length of SCO packets in bytes (not audio frames) 6448 */ 6449 int hci_get_sco_packet_length(void){ 6450 int sco_packet_length = 0; 6451 6452 #ifdef ENABLE_SCO_OVER_HCI 6453 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6454 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6455 6456 if (hci_have_usb_transport()){ 6457 // see Core Spec for H2 USB Transfer. 6458 // 3 byte SCO header + 24 bytes per connection 6459 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6460 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6461 } else { 6462 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6463 sco_packet_length = 3 + 60 * multiplier; 6464 // assert that it still fits inside an SCO buffer 6465 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6466 sco_packet_length = 3 + 60; 6467 } 6468 } 6469 #endif 6470 6471 #ifdef HAVE_SCO_TRANSPORT 6472 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6473 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6474 sco_packet_length = 3 + 60 * multiplier; 6475 #endif 6476 return sco_packet_length; 6477 } 6478 6479 /** 6480 * @brief Sets the master/slave policy 6481 * @param policy (0: attempt to become master, 1: let connecting device decide) 6482 */ 6483 void hci_set_master_slave_policy(uint8_t policy){ 6484 hci_stack->master_slave_policy = policy; 6485 } 6486 6487 #endif 6488 6489 HCI_STATE hci_get_state(void){ 6490 return hci_stack->state; 6491 } 6492 6493 #ifdef ENABLE_CLASSIC 6494 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6495 hci_stack->gap_classic_accept_callback = accept_callback; 6496 } 6497 #endif 6498 6499 /** 6500 * @brief Set callback for Bluetooth Hardware Error 6501 */ 6502 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6503 hci_stack->hardware_error_callback = fn; 6504 } 6505 6506 void hci_disconnect_all(void){ 6507 btstack_linked_list_iterator_t it; 6508 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6509 while (btstack_linked_list_iterator_has_next(&it)){ 6510 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6511 if (con->state == SENT_DISCONNECT) continue; 6512 con->state = SEND_DISCONNECT; 6513 } 6514 hci_run(); 6515 } 6516 6517 uint16_t hci_get_manufacturer(void){ 6518 return hci_stack->manufacturer; 6519 } 6520 6521 #ifdef ENABLE_BLE 6522 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6523 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6524 if (!hci_con) return NULL; 6525 return &hci_con->sm_connection; 6526 } 6527 6528 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6529 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6530 #endif 6531 6532 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6533 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6534 if (hci_connection == NULL) return 0; 6535 if (hci_is_le_connection(hci_connection)){ 6536 #ifdef ENABLE_BLE 6537 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6538 if (sm_conn->sm_connection_encrypted) { 6539 return sm_conn->sm_actual_encryption_key_size; 6540 } 6541 #endif 6542 } else { 6543 #ifdef ENABLE_CLASSIC 6544 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6545 return hci_connection->encryption_key_size; 6546 } 6547 #endif 6548 } 6549 return 0; 6550 } 6551 6552 int gap_authenticated(hci_con_handle_t con_handle){ 6553 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6554 if (hci_connection == NULL) return 0; 6555 6556 switch (hci_connection->address_type){ 6557 #ifdef ENABLE_BLE 6558 case BD_ADDR_TYPE_LE_PUBLIC: 6559 case BD_ADDR_TYPE_LE_RANDOM: 6560 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6561 return hci_connection->sm_connection.sm_connection_authenticated; 6562 #endif 6563 #ifdef ENABLE_CLASSIC 6564 case BD_ADDR_TYPE_SCO: 6565 case BD_ADDR_TYPE_ACL: 6566 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6567 #endif 6568 default: 6569 return 0; 6570 } 6571 } 6572 6573 int gap_secure_connection(hci_con_handle_t con_handle){ 6574 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6575 if (hci_connection == NULL) return 0; 6576 6577 switch (hci_connection->address_type){ 6578 #ifdef ENABLE_BLE 6579 case BD_ADDR_TYPE_LE_PUBLIC: 6580 case BD_ADDR_TYPE_LE_RANDOM: 6581 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6582 return hci_connection->sm_connection.sm_connection_sc; 6583 #endif 6584 #ifdef ENABLE_CLASSIC 6585 case BD_ADDR_TYPE_SCO: 6586 case BD_ADDR_TYPE_ACL: 6587 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6588 #endif 6589 default: 6590 return 0; 6591 } 6592 } 6593 6594 bool gap_bonded(hci_con_handle_t con_handle){ 6595 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6596 if (hci_connection == NULL) return 0; 6597 6598 #ifdef ENABLE_CLASSIC 6599 link_key_t link_key; 6600 link_key_type_t link_key_type; 6601 #endif 6602 switch (hci_connection->address_type){ 6603 #ifdef ENABLE_BLE 6604 case BD_ADDR_TYPE_LE_PUBLIC: 6605 case BD_ADDR_TYPE_LE_RANDOM: 6606 return hci_connection->sm_connection.sm_le_db_index >= 0; 6607 #endif 6608 #ifdef ENABLE_CLASSIC 6609 case BD_ADDR_TYPE_SCO: 6610 case BD_ADDR_TYPE_ACL: 6611 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6612 #endif 6613 default: 6614 return false; 6615 } 6616 } 6617 6618 #ifdef ENABLE_BLE 6619 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6620 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6621 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6622 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6623 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6624 return sm_conn->sm_connection_authorization_state; 6625 } 6626 #endif 6627 6628 #ifdef ENABLE_CLASSIC 6629 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){ 6630 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6631 if (!conn) return GAP_CONNECTION_INVALID; 6632 conn->sniff_min_interval = sniff_min_interval; 6633 conn->sniff_max_interval = sniff_max_interval; 6634 conn->sniff_attempt = sniff_attempt; 6635 conn->sniff_timeout = sniff_timeout; 6636 hci_run(); 6637 return 0; 6638 } 6639 6640 /** 6641 * @brief Exit Sniff mode 6642 * @param con_handle 6643 @ @return 0 if ok 6644 */ 6645 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6646 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6647 if (!conn) return GAP_CONNECTION_INVALID; 6648 conn->sniff_min_interval = 0xffff; 6649 hci_run(); 6650 return 0; 6651 } 6652 6653 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){ 6654 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6655 if (!conn) return GAP_CONNECTION_INVALID; 6656 conn->sniff_subrating_max_latency = max_latency; 6657 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6658 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6659 hci_run(); 6660 return ERROR_CODE_SUCCESS; 6661 } 6662 6663 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){ 6664 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6665 if (!conn) return GAP_CONNECTION_INVALID; 6666 conn->qos_service_type = service_type; 6667 conn->qos_token_rate = token_rate; 6668 conn->qos_peak_bandwidth = peak_bandwidth; 6669 conn->qos_latency = latency; 6670 conn->qos_delay_variation = delay_variation; 6671 hci_run(); 6672 return ERROR_CODE_SUCCESS; 6673 } 6674 6675 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6676 hci_stack->new_page_scan_interval = page_scan_interval; 6677 hci_stack->new_page_scan_window = page_scan_window; 6678 hci_run(); 6679 } 6680 6681 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6682 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6683 hci_run(); 6684 } 6685 6686 #endif 6687 6688 void hci_halting_defer(void){ 6689 if (hci_stack->state != HCI_STATE_HALTING) return; 6690 switch (hci_stack->substate){ 6691 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6692 case HCI_HALTING_CLOSE: 6693 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6694 break; 6695 default: 6696 break; 6697 } 6698 } 6699 6700 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6701 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6702 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6703 if (le_device_db_index >= le_device_db_max_count()) return; 6704 uint8_t offset = le_device_db_index >> 3; 6705 uint8_t mask = 1 << (le_device_db_index & 7); 6706 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6707 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6708 // note: go back to remove entries, otherwise, a remove + add will skip the add 6709 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6710 } 6711 } 6712 6713 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6714 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6715 if (le_device_db_index >= le_device_db_max_count()) return; 6716 uint8_t offset = le_device_db_index >> 3; 6717 uint8_t mask = 1 << (le_device_db_index & 7); 6718 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6719 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6720 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6721 } 6722 } 6723 6724 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6725 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6726 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6727 } 6728 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6729 // restart le resolving list update 6730 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6731 } 6732 return ERROR_CODE_SUCCESS; 6733 } 6734 #endif 6735 6736 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6737 void hci_setup_test_connections_fuzz(void){ 6738 hci_connection_t * conn; 6739 6740 // default address: 66:55:44:33:00:01 6741 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6742 6743 // setup Controller info 6744 hci_stack->num_cmd_packets = 255; 6745 hci_stack->acl_packets_total_num = 255; 6746 6747 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6748 addr[5] = 0x01; 6749 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6750 conn->con_handle = addr[5]; 6751 conn->role = HCI_ROLE_SLAVE; 6752 conn->state = RECEIVED_CONNECTION_REQUEST; 6753 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6754 6755 // setup incoming Classic SCO connection with con handle 0x0002 6756 addr[5] = 0x02; 6757 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6758 conn->con_handle = addr[5]; 6759 conn->role = HCI_ROLE_SLAVE; 6760 conn->state = RECEIVED_CONNECTION_REQUEST; 6761 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6762 6763 // setup ready Classic ACL connection with con handle 0x0003 6764 addr[5] = 0x03; 6765 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6766 conn->con_handle = addr[5]; 6767 conn->role = HCI_ROLE_SLAVE; 6768 conn->state = OPEN; 6769 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6770 6771 // setup ready Classic SCO connection with con handle 0x0004 6772 addr[5] = 0x04; 6773 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6774 conn->con_handle = addr[5]; 6775 conn->role = HCI_ROLE_SLAVE; 6776 conn->state = OPEN; 6777 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6778 6779 // setup ready LE ACL connection with con handle 0x005 and public address 6780 addr[5] = 0x05; 6781 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6782 conn->con_handle = addr[5]; 6783 conn->role = HCI_ROLE_SLAVE; 6784 conn->state = OPEN; 6785 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6786 conn->sm_connection.sm_connection_encrypted = 1; 6787 } 6788 6789 void hci_free_connections_fuzz(void){ 6790 btstack_linked_list_iterator_t it; 6791 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6792 while (btstack_linked_list_iterator_has_next(&it)){ 6793 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6794 btstack_linked_list_iterator_remove(&it); 6795 btstack_memory_hci_connection_free(con); 6796 } 6797 } 6798 void hci_simulate_working_fuzz(void){ 6799 hci_init_done(); 6800 hci_stack->num_cmd_packets = 255; 6801 } 6802 #endif 6803