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