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 if (hci_stack->gap_secure_connections_only_mode){ 3507 return LEVEL_4; 3508 } 3509 return hci_stack->gap_security_level; 3510 } 3511 3512 void gap_set_secure_connections_only_mode(bool enable){ 3513 hci_stack->gap_secure_connections_only_mode = enable; 3514 } 3515 3516 bool gap_get_secure_connections_only_mode(void){ 3517 return hci_stack->gap_secure_connections_only_mode; 3518 } 3519 #endif 3520 3521 #ifdef ENABLE_CLASSIC 3522 void gap_set_class_of_device(uint32_t class_of_device){ 3523 hci_stack->class_of_device = class_of_device; 3524 } 3525 3526 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3527 hci_stack->default_link_policy_settings = default_link_policy_settings; 3528 } 3529 3530 void gap_set_allow_role_switch(bool allow_role_switch){ 3531 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3532 } 3533 3534 uint8_t hci_get_allow_role_switch(void){ 3535 return hci_stack->allow_role_switch; 3536 } 3537 3538 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3539 hci_stack->link_supervision_timeout = link_supervision_timeout; 3540 } 3541 3542 void hci_disable_l2cap_timeout_check(void){ 3543 disable_l2cap_timeouts = 1; 3544 } 3545 #endif 3546 3547 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3548 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3549 void hci_set_bd_addr(bd_addr_t addr){ 3550 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3551 hci_stack->custom_bd_addr_set = 1; 3552 } 3553 #endif 3554 3555 // State-Module-Driver overview 3556 // state module low-level 3557 // HCI_STATE_OFF off close 3558 // HCI_STATE_INITIALIZING, on open 3559 // HCI_STATE_WORKING, on open 3560 // HCI_STATE_HALTING, on open 3561 // HCI_STATE_SLEEPING, off/sleep close 3562 // HCI_STATE_FALLING_ASLEEP on open 3563 3564 static int hci_power_control_on(void){ 3565 3566 // power on 3567 int err = 0; 3568 if (hci_stack->control && hci_stack->control->on){ 3569 err = (*hci_stack->control->on)(); 3570 } 3571 if (err){ 3572 log_error( "POWER_ON failed"); 3573 hci_emit_hci_open_failed(); 3574 return err; 3575 } 3576 3577 // int chipset driver 3578 if (hci_stack->chipset && hci_stack->chipset->init){ 3579 hci_stack->chipset->init(hci_stack->config); 3580 } 3581 3582 // init transport 3583 if (hci_stack->hci_transport->init){ 3584 hci_stack->hci_transport->init(hci_stack->config); 3585 } 3586 3587 // open transport 3588 err = hci_stack->hci_transport->open(); 3589 if (err){ 3590 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3591 if (hci_stack->control && hci_stack->control->off){ 3592 (*hci_stack->control->off)(); 3593 } 3594 hci_emit_hci_open_failed(); 3595 return err; 3596 } 3597 return 0; 3598 } 3599 3600 static void hci_power_control_off(void){ 3601 3602 log_info("hci_power_control_off"); 3603 3604 // close low-level device 3605 hci_stack->hci_transport->close(); 3606 3607 log_info("hci_power_control_off - hci_transport closed"); 3608 3609 // power off 3610 if (hci_stack->control && hci_stack->control->off){ 3611 (*hci_stack->control->off)(); 3612 } 3613 3614 log_info("hci_power_control_off - control closed"); 3615 3616 hci_stack->state = HCI_STATE_OFF; 3617 } 3618 3619 static void hci_power_control_sleep(void){ 3620 3621 log_info("hci_power_control_sleep"); 3622 3623 #if 0 3624 // don't close serial port during sleep 3625 3626 // close low-level device 3627 hci_stack->hci_transport->close(hci_stack->config); 3628 #endif 3629 3630 // sleep mode 3631 if (hci_stack->control && hci_stack->control->sleep){ 3632 (*hci_stack->control->sleep)(); 3633 } 3634 3635 hci_stack->state = HCI_STATE_SLEEPING; 3636 } 3637 3638 static int hci_power_control_wake(void){ 3639 3640 log_info("hci_power_control_wake"); 3641 3642 // wake on 3643 if (hci_stack->control && hci_stack->control->wake){ 3644 (*hci_stack->control->wake)(); 3645 } 3646 3647 #if 0 3648 // open low-level device 3649 int err = hci_stack->hci_transport->open(hci_stack->config); 3650 if (err){ 3651 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3652 if (hci_stack->control && hci_stack->control->off){ 3653 (*hci_stack->control->off)(); 3654 } 3655 hci_emit_hci_open_failed(); 3656 return err; 3657 } 3658 #endif 3659 3660 return 0; 3661 } 3662 3663 static void hci_power_transition_to_initializing(void){ 3664 // set up state machine 3665 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3666 hci_stack->hci_packet_buffer_reserved = 0; 3667 hci_stack->state = HCI_STATE_INITIALIZING; 3668 hci_stack->substate = HCI_INIT_SEND_RESET; 3669 } 3670 3671 // returns error 3672 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3673 int err; 3674 switch (power_mode){ 3675 case HCI_POWER_ON: 3676 err = hci_power_control_on(); 3677 if (err != 0) { 3678 log_error("hci_power_control_on() error %d", err); 3679 return err; 3680 } 3681 hci_power_transition_to_initializing(); 3682 break; 3683 case HCI_POWER_OFF: 3684 // do nothing 3685 break; 3686 case HCI_POWER_SLEEP: 3687 // do nothing (with SLEEP == OFF) 3688 break; 3689 default: 3690 btstack_assert(false); 3691 break; 3692 } 3693 return ERROR_CODE_SUCCESS; 3694 } 3695 3696 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3697 switch (power_mode){ 3698 case HCI_POWER_ON: 3699 // do nothing 3700 break; 3701 case HCI_POWER_OFF: 3702 // no connections yet, just turn it off 3703 hci_power_control_off(); 3704 break; 3705 case HCI_POWER_SLEEP: 3706 // no connections yet, just turn it off 3707 hci_power_control_sleep(); 3708 break; 3709 default: 3710 btstack_assert(false); 3711 break; 3712 } 3713 return ERROR_CODE_SUCCESS; 3714 } 3715 3716 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3717 switch (power_mode){ 3718 case HCI_POWER_ON: 3719 // do nothing 3720 break; 3721 case HCI_POWER_OFF: 3722 // see hci_run 3723 hci_stack->state = HCI_STATE_HALTING; 3724 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3725 break; 3726 case HCI_POWER_SLEEP: 3727 // see hci_run 3728 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3729 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3730 break; 3731 default: 3732 btstack_assert(false); 3733 break; 3734 } 3735 return ERROR_CODE_SUCCESS; 3736 } 3737 3738 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3739 switch (power_mode){ 3740 case HCI_POWER_ON: 3741 hci_power_transition_to_initializing(); 3742 break; 3743 case HCI_POWER_OFF: 3744 // do nothing 3745 break; 3746 case HCI_POWER_SLEEP: 3747 // see hci_run 3748 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3749 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3750 break; 3751 default: 3752 btstack_assert(false); 3753 break; 3754 } 3755 return ERROR_CODE_SUCCESS; 3756 } 3757 3758 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3759 switch (power_mode){ 3760 case HCI_POWER_ON: 3761 3762 #ifdef HAVE_PLATFORM_IPHONE_OS 3763 // nothing to do, if H4 supports power management 3764 if (btstack_control_iphone_power_management_enabled()){ 3765 hci_stack->state = HCI_STATE_INITIALIZING; 3766 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3767 break; 3768 } 3769 #endif 3770 hci_power_transition_to_initializing(); 3771 break; 3772 case HCI_POWER_OFF: 3773 // see hci_run 3774 hci_stack->state = HCI_STATE_HALTING; 3775 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3776 break; 3777 case HCI_POWER_SLEEP: 3778 // do nothing 3779 break; 3780 default: 3781 btstack_assert(false); 3782 break; 3783 } 3784 return ERROR_CODE_SUCCESS; 3785 } 3786 3787 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3788 int err; 3789 switch (power_mode){ 3790 case HCI_POWER_ON: 3791 #ifdef HAVE_PLATFORM_IPHONE_OS 3792 // nothing to do, if H4 supports power management 3793 if (btstack_control_iphone_power_management_enabled()){ 3794 hci_stack->state = HCI_STATE_INITIALIZING; 3795 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3796 hci_update_scan_enable(); 3797 break; 3798 } 3799 #endif 3800 err = hci_power_control_wake(); 3801 if (err) return err; 3802 hci_power_transition_to_initializing(); 3803 break; 3804 case HCI_POWER_OFF: 3805 hci_stack->state = HCI_STATE_HALTING; 3806 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3807 break; 3808 case HCI_POWER_SLEEP: 3809 // do nothing 3810 break; 3811 default: 3812 btstack_assert(false); 3813 break; 3814 } 3815 return ERROR_CODE_SUCCESS; 3816 } 3817 3818 int hci_power_control(HCI_POWER_MODE power_mode){ 3819 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3820 int err = 0; 3821 switch (hci_stack->state){ 3822 case HCI_STATE_OFF: 3823 err = hci_power_control_state_off(power_mode); 3824 break; 3825 case HCI_STATE_INITIALIZING: 3826 err = hci_power_control_state_initializing(power_mode); 3827 break; 3828 case HCI_STATE_WORKING: 3829 err = hci_power_control_state_working(power_mode); 3830 break; 3831 case HCI_STATE_HALTING: 3832 err = hci_power_control_state_halting(power_mode); 3833 break; 3834 case HCI_STATE_FALLING_ASLEEP: 3835 err = hci_power_control_state_falling_asleep(power_mode); 3836 break; 3837 case HCI_STATE_SLEEPING: 3838 err = hci_power_control_state_sleeping(power_mode); 3839 break; 3840 default: 3841 btstack_assert(false); 3842 break; 3843 } 3844 if (err != 0){ 3845 return err; 3846 } 3847 3848 // create internal event 3849 hci_emit_state(); 3850 3851 // trigger next/first action 3852 hci_run(); 3853 3854 return 0; 3855 } 3856 3857 3858 #ifdef ENABLE_CLASSIC 3859 3860 static void hci_update_scan_enable(void){ 3861 // 2 = page scan, 1 = inq scan 3862 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3863 hci_run(); 3864 } 3865 3866 void gap_discoverable_control(uint8_t enable){ 3867 if (enable) enable = 1; // normalize argument 3868 3869 if (hci_stack->discoverable == enable){ 3870 hci_emit_discoverable_enabled(hci_stack->discoverable); 3871 return; 3872 } 3873 3874 hci_stack->discoverable = enable; 3875 hci_update_scan_enable(); 3876 } 3877 3878 void gap_connectable_control(uint8_t enable){ 3879 if (enable) enable = 1; // normalize argument 3880 3881 // don't emit event 3882 if (hci_stack->connectable == enable) return; 3883 3884 hci_stack->connectable = enable; 3885 hci_update_scan_enable(); 3886 } 3887 #endif 3888 3889 void gap_local_bd_addr(bd_addr_t address_buffer){ 3890 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3891 } 3892 3893 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3894 static void hci_host_num_completed_packets(void){ 3895 3896 // create packet manually as arrays are not supported and num_commands should not get reduced 3897 hci_reserve_packet_buffer(); 3898 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3899 3900 uint16_t size = 0; 3901 uint16_t num_handles = 0; 3902 packet[size++] = 0x35; 3903 packet[size++] = 0x0c; 3904 size++; // skip param len 3905 size++; // skip num handles 3906 3907 // add { handle, packets } entries 3908 btstack_linked_item_t * it; 3909 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3910 hci_connection_t * connection = (hci_connection_t *) it; 3911 if (connection->num_packets_completed){ 3912 little_endian_store_16(packet, size, connection->con_handle); 3913 size += 2; 3914 little_endian_store_16(packet, size, connection->num_packets_completed); 3915 size += 2; 3916 // 3917 num_handles++; 3918 connection->num_packets_completed = 0; 3919 } 3920 } 3921 3922 packet[2] = size - 3; 3923 packet[3] = num_handles; 3924 3925 hci_stack->host_completed_packets = 0; 3926 3927 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3928 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3929 3930 // release packet buffer for synchronous transport implementations 3931 if (hci_transport_synchronous()){ 3932 hci_release_packet_buffer(); 3933 hci_emit_transport_packet_sent(); 3934 } 3935 } 3936 #endif 3937 3938 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3939 UNUSED(ds); 3940 hci_stack->substate = HCI_HALTING_CLOSE; 3941 // allow packet handlers to defer final shutdown 3942 hci_emit_state(); 3943 hci_run(); 3944 } 3945 3946 static bool hci_run_acl_fragments(void){ 3947 if (hci_stack->acl_fragmentation_total_size > 0u) { 3948 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3949 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3950 if (connection) { 3951 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3952 hci_send_acl_packet_fragments(connection); 3953 return true; 3954 } 3955 } else { 3956 // connection gone -> discard further fragments 3957 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3958 hci_stack->acl_fragmentation_total_size = 0; 3959 hci_stack->acl_fragmentation_pos = 0; 3960 } 3961 } 3962 return false; 3963 } 3964 3965 #ifdef ENABLE_CLASSIC 3966 static bool hci_run_general_gap_classic(void){ 3967 3968 // decline incoming connections 3969 if (hci_stack->decline_reason){ 3970 uint8_t reason = hci_stack->decline_reason; 3971 hci_stack->decline_reason = 0; 3972 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3973 return true; 3974 } 3975 // write page scan activity 3976 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 3977 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 3978 hci_stack->new_page_scan_interval = 0xffff; 3979 hci_stack->new_page_scan_window = 0xffff; 3980 return true; 3981 } 3982 // write page scan type 3983 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 3984 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 3985 hci_stack->new_page_scan_type = 0xff; 3986 return true; 3987 } 3988 // send scan enable 3989 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3990 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3991 hci_stack->new_scan_enable_value = 0xff; 3992 return true; 3993 } 3994 // start/stop inquiry 3995 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3996 uint8_t duration = hci_stack->inquiry_state; 3997 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 3998 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 3999 return true; 4000 } 4001 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4002 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4003 hci_send_cmd(&hci_inquiry_cancel); 4004 return true; 4005 } 4006 // remote name request 4007 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4008 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4009 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4010 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4011 return true; 4012 } 4013 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4014 // Local OOB data 4015 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 4016 hci_stack->classic_read_local_oob_data = false; 4017 if (hci_stack->local_supported_commands[1] & 0x10u){ 4018 hci_send_cmd(&hci_read_local_extended_oob_data); 4019 } else { 4020 hci_send_cmd(&hci_read_local_oob_data); 4021 } 4022 } 4023 #endif 4024 // pairing 4025 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4026 uint8_t state = hci_stack->gap_pairing_state; 4027 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4028 uint8_t pin_code[16]; 4029 switch (state){ 4030 case GAP_PAIRING_STATE_SEND_PIN: 4031 memset(pin_code, 0, 16); 4032 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4033 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4034 break; 4035 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4036 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4037 break; 4038 case GAP_PAIRING_STATE_SEND_PASSKEY: 4039 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4040 break; 4041 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4042 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4043 break; 4044 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4045 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4046 break; 4047 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4048 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4049 break; 4050 default: 4051 break; 4052 } 4053 return true; 4054 } 4055 return false; 4056 } 4057 #endif 4058 4059 #ifdef ENABLE_BLE 4060 static bool hci_run_general_gap_le(void){ 4061 4062 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4063 4064 if (hci_stack->state != HCI_STATE_WORKING) return false; 4065 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4066 4067 4068 // Phase 1: collect what to stop 4069 4070 bool scanning_stop = false; 4071 bool connecting_stop = false; 4072 bool advertising_stop = false; 4073 4074 #ifndef ENABLE_LE_CENTRAL 4075 UNUSED(scanning_stop); 4076 UNUSED(connecting_stop); 4077 #endif 4078 #ifndef ENABLE_LE_PERIPHERAL 4079 UNUSED(advertising_stop); 4080 #endif 4081 4082 // check if whitelist needs modification 4083 bool whitelist_modification_pending = false; 4084 btstack_linked_list_iterator_t lit; 4085 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4086 while (btstack_linked_list_iterator_has_next(&lit)){ 4087 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4088 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4089 whitelist_modification_pending = true; 4090 break; 4091 } 4092 } 4093 // check if resolving list needs modification 4094 bool resolving_list_modification_pending = false; 4095 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4096 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4097 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4098 resolving_list_modification_pending = true; 4099 } 4100 #endif 4101 4102 #ifdef ENABLE_LE_CENTRAL 4103 // scanning control 4104 if (hci_stack->le_scanning_active) { 4105 // stop if: 4106 // - parameter change required 4107 // - it's disabled 4108 // - whitelist change required but used for scanning 4109 // - resolving list modified 4110 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4111 if ((hci_stack->le_scanning_param_update) || 4112 !hci_stack->le_scanning_enabled || 4113 scanning_uses_whitelist || 4114 resolving_list_modification_pending){ 4115 4116 scanning_stop = true; 4117 } 4118 } 4119 #endif 4120 4121 #ifdef ENABLE_LE_CENTRAL 4122 // connecting control 4123 bool connecting_with_whitelist; 4124 switch (hci_stack->le_connecting_state){ 4125 case LE_CONNECTING_DIRECT: 4126 case LE_CONNECTING_WHITELIST: 4127 // stop connecting if: 4128 // - connecting uses white and whitelist modification pending 4129 // - if it got disabled 4130 // - resolving list modified 4131 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4132 if ((connecting_with_whitelist && whitelist_modification_pending) || 4133 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4134 resolving_list_modification_pending) { 4135 4136 connecting_stop = true; 4137 } 4138 break; 4139 default: 4140 break; 4141 } 4142 #endif 4143 4144 #ifdef ENABLE_LE_PERIPHERAL 4145 // le advertisement control 4146 if (hci_stack->le_advertisements_active){ 4147 // stop if: 4148 // - parameter change required 4149 // - it's disabled 4150 // - whitelist change required but used for advertisement filter policy 4151 // - resolving list modified 4152 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4153 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4154 if (advertising_change || 4155 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4156 (advertising_uses_whitelist & whitelist_modification_pending) || 4157 resolving_list_modification_pending) { 4158 4159 advertising_stop = true; 4160 } 4161 } 4162 #endif 4163 4164 4165 // Phase 2: stop everything that should be off during modifications 4166 4167 #ifdef ENABLE_LE_CENTRAL 4168 if (scanning_stop){ 4169 hci_stack->le_scanning_active = false; 4170 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4171 return true; 4172 } 4173 #endif 4174 4175 #ifdef ENABLE_LE_CENTRAL 4176 if (connecting_stop){ 4177 hci_send_cmd(&hci_le_create_connection_cancel); 4178 return true; 4179 } 4180 #endif 4181 4182 #ifdef ENABLE_LE_PERIPHERAL 4183 if (advertising_stop){ 4184 hci_stack->le_advertisements_active = false; 4185 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4186 return true; 4187 } 4188 #endif 4189 4190 // Phase 3: modify 4191 4192 #ifdef ENABLE_LE_CENTRAL 4193 if (hci_stack->le_scanning_param_update){ 4194 hci_stack->le_scanning_param_update = false; 4195 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4196 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4197 return true; 4198 } 4199 #endif 4200 4201 #ifdef ENABLE_LE_PERIPHERAL 4202 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4203 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4204 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4205 hci_send_cmd(&hci_le_set_advertising_parameters, 4206 hci_stack->le_advertisements_interval_min, 4207 hci_stack->le_advertisements_interval_max, 4208 hci_stack->le_advertisements_type, 4209 hci_stack->le_advertisements_own_addr_type, 4210 hci_stack->le_advertisements_direct_address_type, 4211 hci_stack->le_advertisements_direct_address, 4212 hci_stack->le_advertisements_channel_map, 4213 hci_stack->le_advertisements_filter_policy); 4214 return true; 4215 } 4216 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4217 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4218 uint8_t adv_data_clean[31]; 4219 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4220 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4221 hci_stack->le_advertisements_data_len); 4222 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4223 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4224 return true; 4225 } 4226 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4227 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4228 uint8_t scan_data_clean[31]; 4229 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4230 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4231 hci_stack->le_scan_response_data_len); 4232 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4233 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4234 return true; 4235 } 4236 #endif 4237 4238 4239 #ifdef ENABLE_LE_CENTRAL 4240 // if connect with whitelist was active and is not cancelled yet, wait until next time 4241 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4242 #endif 4243 4244 // LE Whitelist Management 4245 if (whitelist_modification_pending){ 4246 // add/remove entries 4247 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4248 while (btstack_linked_list_iterator_has_next(&lit)){ 4249 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4250 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4251 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4252 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4253 return true; 4254 } 4255 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4256 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4257 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4258 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4259 return true; 4260 } 4261 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4262 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4263 btstack_memory_whitelist_entry_free(entry); 4264 } 4265 } 4266 } 4267 4268 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4269 // LE Resolving List Management 4270 if (resolving_list_supported) { 4271 uint16_t i; 4272 switch (hci_stack->le_resolving_list_state) { 4273 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4274 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4275 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4276 return true; 4277 case LE_RESOLVING_LIST_READ_SIZE: 4278 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4279 hci_send_cmd(&hci_le_read_resolving_list_size); 4280 return true; 4281 case LE_RESOLVING_LIST_SEND_CLEAR: 4282 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4283 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4284 sizeof(hci_stack->le_resolving_list_add_entries)); 4285 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4286 sizeof(hci_stack->le_resolving_list_remove_entries)); 4287 hci_send_cmd(&hci_le_clear_resolving_list); 4288 return true; 4289 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4290 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4291 uint8_t offset = i >> 3; 4292 uint8_t mask = 1 << (i & 7); 4293 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4294 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4295 bd_addr_t peer_identity_addreses; 4296 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4297 sm_key_t peer_irk; 4298 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4299 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4300 4301 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4302 // trigger whitelist entry 'update' (work around for controller bug) 4303 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4304 while (btstack_linked_list_iterator_has_next(&lit)) { 4305 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4306 if (entry->address_type != peer_identity_addr_type) continue; 4307 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4308 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4309 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4310 } 4311 #endif 4312 4313 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4314 peer_identity_addreses); 4315 return true; 4316 } 4317 4318 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4319 4320 /* fall through */ 4321 4322 case LE_RESOLVING_LIST_ADD_ENTRIES: 4323 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4324 uint8_t offset = i >> 3; 4325 uint8_t mask = 1 << (i & 7); 4326 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4327 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4328 bd_addr_t peer_identity_addreses; 4329 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4330 sm_key_t peer_irk; 4331 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4332 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4333 const uint8_t *local_irk = gap_get_persistent_irk(); 4334 // command uses format specifier 'P' that stores 16-byte value without flip 4335 uint8_t local_irk_flipped[16]; 4336 uint8_t peer_irk_flipped[16]; 4337 reverse_128(local_irk, local_irk_flipped); 4338 reverse_128(peer_irk, peer_irk_flipped); 4339 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4340 peer_irk_flipped, local_irk_flipped); 4341 return true; 4342 } 4343 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4344 break; 4345 4346 default: 4347 break; 4348 } 4349 } 4350 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4351 #endif 4352 4353 // Phase 4: restore state 4354 4355 #ifdef ENABLE_LE_CENTRAL 4356 // re-start scanning 4357 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4358 hci_stack->le_scanning_active = true; 4359 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4360 return true; 4361 } 4362 #endif 4363 4364 #ifdef ENABLE_LE_CENTRAL 4365 // re-start connecting 4366 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4367 bd_addr_t null_addr; 4368 memset(null_addr, 0, 6); 4369 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4370 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4371 hci_send_cmd(&hci_le_create_connection, 4372 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4373 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4374 1, // use whitelist 4375 0, // peer address type 4376 null_addr, // peer bd addr 4377 hci_stack->le_connection_own_addr_type, // our addr type: 4378 hci_stack->le_connection_interval_min, // conn interval min 4379 hci_stack->le_connection_interval_max, // conn interval max 4380 hci_stack->le_connection_latency, // conn latency 4381 hci_stack->le_supervision_timeout, // conn latency 4382 hci_stack->le_minimum_ce_length, // min ce length 4383 hci_stack->le_maximum_ce_length // max ce length 4384 ); 4385 return true; 4386 } 4387 #endif 4388 4389 #ifdef ENABLE_LE_PERIPHERAL 4390 // re-start advertising 4391 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4392 // check if advertisements should be enabled given 4393 hci_stack->le_advertisements_active = true; 4394 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4395 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4396 return true; 4397 } 4398 #endif 4399 4400 return false; 4401 } 4402 #endif 4403 4404 static bool hci_run_general_pending_commands(void){ 4405 btstack_linked_item_t * it; 4406 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4407 hci_connection_t * connection = (hci_connection_t *) it; 4408 4409 switch(connection->state){ 4410 case SEND_CREATE_CONNECTION: 4411 switch(connection->address_type){ 4412 #ifdef ENABLE_CLASSIC 4413 case BD_ADDR_TYPE_ACL: 4414 log_info("sending hci_create_connection"); 4415 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4416 break; 4417 #endif 4418 default: 4419 #ifdef ENABLE_BLE 4420 #ifdef ENABLE_LE_CENTRAL 4421 log_info("sending hci_le_create_connection"); 4422 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4423 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4424 hci_send_cmd(&hci_le_create_connection, 4425 hci_stack->le_connection_scan_interval, // conn scan interval 4426 hci_stack->le_connection_scan_window, // conn scan windows 4427 0, // don't use whitelist 4428 connection->address_type, // peer address type 4429 connection->address, // peer bd addr 4430 hci_stack->le_connection_own_addr_type, // our addr type: 4431 hci_stack->le_connection_interval_min, // conn interval min 4432 hci_stack->le_connection_interval_max, // conn interval max 4433 hci_stack->le_connection_latency, // conn latency 4434 hci_stack->le_supervision_timeout, // conn latency 4435 hci_stack->le_minimum_ce_length, // min ce length 4436 hci_stack->le_maximum_ce_length // max ce length 4437 ); 4438 connection->state = SENT_CREATE_CONNECTION; 4439 #endif 4440 #endif 4441 break; 4442 } 4443 return true; 4444 4445 #ifdef ENABLE_CLASSIC 4446 case RECEIVED_CONNECTION_REQUEST: 4447 connection->role = HCI_ROLE_SLAVE; 4448 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4449 log_info("sending hci_accept_connection_request"); 4450 connection->state = ACCEPTED_CONNECTION_REQUEST; 4451 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4452 } 4453 return true; 4454 #endif 4455 4456 #ifdef ENABLE_BLE 4457 #ifdef ENABLE_LE_CENTRAL 4458 case SEND_CANCEL_CONNECTION: 4459 connection->state = SENT_CANCEL_CONNECTION; 4460 hci_send_cmd(&hci_le_create_connection_cancel); 4461 return true; 4462 #endif 4463 #endif 4464 case SEND_DISCONNECT: 4465 connection->state = SENT_DISCONNECT; 4466 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4467 return true; 4468 4469 default: 4470 break; 4471 } 4472 4473 // no further commands if connection is about to get shut down 4474 if (connection->state == SENT_DISCONNECT) continue; 4475 4476 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4477 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4478 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4479 return true; 4480 } 4481 4482 #ifdef ENABLE_CLASSIC 4483 4484 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4485 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4486 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4487 return true; 4488 } 4489 4490 // Handling link key request requires remote supported features 4491 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4492 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4493 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4494 4495 // lookup link key using cached key first 4496 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4497 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4498 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4499 } 4500 4501 bool sc_enabled_remote = hci_remote_sc_enabled(connection); 4502 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(connection->link_key_type) == 1) && !sc_enabled_remote; 4503 if (sc_downgrade){ 4504 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4505 connection->state = SENT_DISCONNECT; 4506 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4507 return true; 4508 } 4509 4510 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4511 if (have_link_key && security_level_sufficient){ 4512 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4513 } else { 4514 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4515 } 4516 return true; 4517 } 4518 4519 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4520 log_info("denying to pin request"); 4521 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4522 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4523 return true; 4524 } 4525 4526 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4527 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4528 // set authentication requirements: 4529 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4530 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4531 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4532 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4533 authreq |= 1; 4534 } 4535 bool bonding = hci_stack->bondable; 4536 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4537 // if we have received IO Cap Response, we're in responder role 4538 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4539 if (bonding && !remote_bonding){ 4540 log_info("Remote not bonding, dropping local flag"); 4541 bonding = false; 4542 } 4543 } 4544 if (bonding){ 4545 if (connection->bonding_flags & BONDING_DEDICATED){ 4546 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4547 } else { 4548 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4549 } 4550 } 4551 uint8_t have_oob_data = 0; 4552 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4553 if (connection->classic_oob_c_192 != NULL){ 4554 have_oob_data |= 1; 4555 } 4556 if (connection->classic_oob_c_256 != NULL){ 4557 have_oob_data |= 2; 4558 } 4559 #endif 4560 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4561 return true; 4562 } 4563 4564 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4565 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4566 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4567 return true; 4568 } 4569 4570 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4571 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4572 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4573 const uint8_t zero[16] = { 0 }; 4574 const uint8_t * r_192 = zero; 4575 const uint8_t * c_192 = zero; 4576 const uint8_t * r_256 = zero; 4577 const uint8_t * c_256 = zero; 4578 // verify P-256 OOB 4579 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4580 c_256 = connection->classic_oob_c_256; 4581 if (connection->classic_oob_r_256 != NULL) { 4582 r_256 = connection->classic_oob_r_256; 4583 } 4584 } 4585 // verify P-192 OOB 4586 if ((connection->classic_oob_c_192 != NULL)) { 4587 c_192 = connection->classic_oob_c_192; 4588 if (connection->classic_oob_r_192 != NULL) { 4589 r_192 = connection->classic_oob_r_192; 4590 } 4591 } 4592 // Reply 4593 if (c_256 != zero) { 4594 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4595 } else if (c_192 != zero){ 4596 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4597 } else { 4598 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4599 } 4600 return true; 4601 } 4602 #endif 4603 4604 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4605 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4606 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4607 return true; 4608 } 4609 4610 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4611 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4612 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4613 return true; 4614 } 4615 4616 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4617 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4618 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4619 return true; 4620 } 4621 4622 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4623 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4624 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4625 return true; 4626 } 4627 4628 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4629 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4630 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4631 return true; 4632 } 4633 4634 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4635 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4636 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4637 return true; 4638 } 4639 4640 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4641 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4642 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4643 connection->state = SENT_DISCONNECT; 4644 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4645 return true; 4646 } 4647 4648 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4649 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4650 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4651 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4652 return true; 4653 } 4654 4655 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4656 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4657 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4658 return true; 4659 } 4660 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4661 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4662 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4663 return true; 4664 } 4665 #endif 4666 4667 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4668 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4669 #ifdef ENABLE_CLASSIC 4670 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4671 #endif 4672 if (connection->state != SENT_DISCONNECT){ 4673 connection->state = SENT_DISCONNECT; 4674 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4675 return true; 4676 } 4677 } 4678 4679 #ifdef ENABLE_CLASSIC 4680 uint16_t sniff_min_interval; 4681 switch (connection->sniff_min_interval){ 4682 case 0: 4683 break; 4684 case 0xffff: 4685 connection->sniff_min_interval = 0; 4686 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4687 return true; 4688 default: 4689 sniff_min_interval = connection->sniff_min_interval; 4690 connection->sniff_min_interval = 0; 4691 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4692 return true; 4693 } 4694 4695 if (connection->sniff_subrating_max_latency != 0xffff){ 4696 uint16_t max_latency = connection->sniff_subrating_max_latency; 4697 connection->sniff_subrating_max_latency = 0; 4698 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4699 return true; 4700 } 4701 4702 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4703 uint8_t service_type = (uint8_t) connection->qos_service_type; 4704 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4705 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); 4706 return true; 4707 } 4708 4709 if (connection->request_role != HCI_ROLE_INVALID){ 4710 hci_role_t role = connection->request_role; 4711 connection->request_role = HCI_ROLE_INVALID; 4712 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4713 return true; 4714 } 4715 #endif 4716 4717 #ifdef ENABLE_BLE 4718 switch (connection->le_con_parameter_update_state){ 4719 // response to L2CAP CON PARAMETER UPDATE REQUEST 4720 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4721 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4722 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4723 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4724 0x0000, 0xffff); 4725 return true; 4726 case CON_PARAMETER_UPDATE_REPLY: 4727 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4728 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4729 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4730 0x0000, 0xffff); 4731 return true; 4732 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4733 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4734 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4735 return true; 4736 default: 4737 break; 4738 } 4739 if (connection->le_phy_update_all_phys != 0xffu){ 4740 uint8_t all_phys = connection->le_phy_update_all_phys; 4741 connection->le_phy_update_all_phys = 0xff; 4742 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); 4743 return true; 4744 } 4745 #endif 4746 } 4747 return false; 4748 } 4749 4750 static void hci_run(void){ 4751 4752 bool done; 4753 4754 // send continuation fragments first, as they block the prepared packet buffer 4755 done = hci_run_acl_fragments(); 4756 if (done) return; 4757 4758 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4759 // send host num completed packets next as they don't require num_cmd_packets > 0 4760 if (!hci_can_send_comand_packet_transport()) return; 4761 if (hci_stack->host_completed_packets){ 4762 hci_host_num_completed_packets(); 4763 return; 4764 } 4765 #endif 4766 4767 if (!hci_can_send_command_packet_now()) return; 4768 4769 // global/non-connection oriented commands 4770 4771 4772 #ifdef ENABLE_CLASSIC 4773 // general gap classic 4774 done = hci_run_general_gap_classic(); 4775 if (done) return; 4776 #endif 4777 4778 #ifdef ENABLE_BLE 4779 // general gap le 4780 done = hci_run_general_gap_le(); 4781 if (done) return; 4782 #endif 4783 4784 // send pending HCI commands 4785 done = hci_run_general_pending_commands(); 4786 if (done) return; 4787 4788 // stack state sub statemachines 4789 hci_connection_t * connection; 4790 switch (hci_stack->state){ 4791 case HCI_STATE_INITIALIZING: 4792 hci_initializing_run(); 4793 break; 4794 4795 case HCI_STATE_HALTING: 4796 4797 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4798 switch (hci_stack->substate){ 4799 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4800 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4801 4802 #ifdef ENABLE_BLE 4803 #ifdef ENABLE_LE_CENTRAL 4804 // free whitelist entries 4805 { 4806 btstack_linked_list_iterator_t lit; 4807 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4808 while (btstack_linked_list_iterator_has_next(&lit)){ 4809 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4810 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4811 btstack_memory_whitelist_entry_free(entry); 4812 } 4813 } 4814 #endif 4815 #endif 4816 // close all open connections 4817 connection = (hci_connection_t *) hci_stack->connections; 4818 if (connection){ 4819 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4820 if (!hci_can_send_command_packet_now()) return; 4821 4822 // check state 4823 if (connection->state == SENT_DISCONNECT) return; 4824 connection->state = SENT_DISCONNECT; 4825 4826 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4827 4828 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4829 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4830 4831 // ... which would be ignored anyway as we shutdown (free) the connection now 4832 hci_shutdown_connection(connection); 4833 4834 // finally, send the disconnect command 4835 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4836 return; 4837 } 4838 4839 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4840 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4841 log_info("HCI_STATE_HALTING: wait 50 ms"); 4842 hci_stack->substate = HCI_HALTING_W4_TIMER; 4843 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4844 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4845 btstack_run_loop_add_timer(&hci_stack->timeout); 4846 break; 4847 } 4848 4849 /* fall through */ 4850 4851 case HCI_HALTING_CLOSE: 4852 log_info("HCI_STATE_HALTING, calling off"); 4853 4854 // switch mode 4855 hci_power_control_off(); 4856 4857 log_info("HCI_STATE_HALTING, emitting state"); 4858 hci_emit_state(); 4859 log_info("HCI_STATE_HALTING, done"); 4860 break; 4861 4862 case HCI_HALTING_W4_TIMER: 4863 // keep waiting 4864 4865 break; 4866 default: 4867 break; 4868 } 4869 4870 break; 4871 4872 case HCI_STATE_FALLING_ASLEEP: 4873 switch(hci_stack->substate) { 4874 case HCI_FALLING_ASLEEP_DISCONNECT: 4875 log_info("HCI_STATE_FALLING_ASLEEP"); 4876 // close all open connections 4877 connection = (hci_connection_t *) hci_stack->connections; 4878 4879 #ifdef HAVE_PLATFORM_IPHONE_OS 4880 // don't close connections, if H4 supports power management 4881 if (btstack_control_iphone_power_management_enabled()){ 4882 connection = NULL; 4883 } 4884 #endif 4885 if (connection){ 4886 4887 // send disconnect 4888 if (!hci_can_send_command_packet_now()) return; 4889 4890 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4891 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4892 4893 // send disconnected event right away - causes higher layer connections to get closed, too. 4894 hci_shutdown_connection(connection); 4895 return; 4896 } 4897 4898 if (hci_classic_supported()){ 4899 // disable page and inquiry scan 4900 if (!hci_can_send_command_packet_now()) return; 4901 4902 log_info("HCI_STATE_HALTING, disabling inq scans"); 4903 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4904 4905 // continue in next sub state 4906 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4907 break; 4908 } 4909 4910 /* fall through */ 4911 4912 case HCI_FALLING_ASLEEP_COMPLETE: 4913 log_info("HCI_STATE_HALTING, calling sleep"); 4914 #ifdef HAVE_PLATFORM_IPHONE_OS 4915 // don't actually go to sleep, if H4 supports power management 4916 if (btstack_control_iphone_power_management_enabled()){ 4917 // SLEEP MODE reached 4918 hci_stack->state = HCI_STATE_SLEEPING; 4919 hci_emit_state(); 4920 break; 4921 } 4922 #endif 4923 // switch mode 4924 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4925 hci_emit_state(); 4926 break; 4927 4928 default: 4929 break; 4930 } 4931 break; 4932 4933 default: 4934 break; 4935 } 4936 } 4937 4938 int hci_send_cmd_packet(uint8_t *packet, int size){ 4939 // house-keeping 4940 4941 #ifdef ENABLE_CLASSIC 4942 bd_addr_t addr; 4943 hci_connection_t * conn; 4944 #endif 4945 #ifdef ENABLE_LE_CENTRAL 4946 uint8_t initiator_filter_policy; 4947 #endif 4948 4949 uint16_t opcode = little_endian_read_16(packet, 0); 4950 switch (opcode) { 4951 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4952 hci_stack->loopback_mode = packet[3]; 4953 break; 4954 4955 #ifdef ENABLE_CLASSIC 4956 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4957 reverse_bd_addr(&packet[3], addr); 4958 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4959 4960 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4961 if (!conn) { 4962 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4963 if (!conn) { 4964 // notify client that alloc failed 4965 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4966 return -1; // packet not sent to controller 4967 } 4968 conn->state = SEND_CREATE_CONNECTION; 4969 conn->role = HCI_ROLE_MASTER; 4970 } 4971 log_info("conn state %u", conn->state); 4972 switch (conn->state) { 4973 // if connection active exists 4974 case OPEN: 4975 // and OPEN, emit connection complete command 4976 hci_emit_connection_complete(addr, conn->con_handle, 0); 4977 return -1; // packet not sent to controller 4978 case RECEIVED_DISCONNECTION_COMPLETE: 4979 // create connection triggered in disconnect complete event, let's do it now 4980 break; 4981 case SEND_CREATE_CONNECTION: 4982 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4983 break; 4984 default: 4985 // otherwise, just ignore as it is already in the open process 4986 return -1; // packet not sent to controller 4987 } 4988 conn->state = SENT_CREATE_CONNECTION; 4989 4990 // track outgoing connection 4991 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4992 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4993 break; 4994 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4995 if (hci_stack->link_key_db) { 4996 reverse_bd_addr(&packet[3], addr); 4997 hci_stack->link_key_db->delete_link_key(addr); 4998 } 4999 break; 5000 5001 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5002 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5003 // setup_synchronous_connection? Voice setting at offset 22 5004 // TODO: compare to current setting if sco connection already active 5005 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5006 break; 5007 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5008 // accept_synchronus_connection? Voice setting at offset 18 5009 // TODO: compare to current setting if sco connection already active 5010 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5011 break; 5012 #endif 5013 #endif 5014 5015 #ifdef ENABLE_BLE 5016 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5017 hci_stack->le_random_address_set = 1; 5018 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5019 break; 5020 #ifdef ENABLE_LE_PERIPHERAL 5021 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5022 hci_stack->le_advertisements_active = packet[3] != 0; 5023 break; 5024 #endif 5025 #ifdef ENABLE_LE_CENTRAL 5026 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5027 // white list used? 5028 initiator_filter_policy = packet[7]; 5029 switch (initiator_filter_policy) { 5030 case 0: 5031 // whitelist not used 5032 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5033 break; 5034 case 1: 5035 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5036 break; 5037 default: 5038 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5039 break; 5040 } 5041 // track outgoing connection 5042 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5043 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5044 break; 5045 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5046 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5047 break; 5048 #endif 5049 #endif 5050 default: 5051 break; 5052 } 5053 5054 hci_stack->num_cmd_packets--; 5055 5056 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5057 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5058 } 5059 5060 // disconnect because of security block 5061 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5062 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5063 if (!connection) return; 5064 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5065 } 5066 5067 5068 // Configure Secure Simple Pairing 5069 5070 #ifdef ENABLE_CLASSIC 5071 5072 // enable will enable SSP during init 5073 void gap_ssp_set_enable(int enable){ 5074 hci_stack->ssp_enable = enable; 5075 } 5076 5077 static int hci_local_ssp_activated(void){ 5078 return gap_ssp_supported() && hci_stack->ssp_enable; 5079 } 5080 5081 // if set, BTstack will respond to io capability request using authentication requirement 5082 void gap_ssp_set_io_capability(int io_capability){ 5083 hci_stack->ssp_io_capability = io_capability; 5084 } 5085 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5086 hci_stack->ssp_authentication_requirement = authentication_requirement; 5087 } 5088 5089 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5090 void gap_ssp_set_auto_accept(int auto_accept){ 5091 hci_stack->ssp_auto_accept = auto_accept; 5092 } 5093 5094 void gap_secure_connections_enable(bool enable){ 5095 hci_stack->secure_connections_enable = enable; 5096 } 5097 5098 #endif 5099 5100 // va_list part of hci_send_cmd 5101 int hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5102 if (!hci_can_send_command_packet_now()){ 5103 log_error("hci_send_cmd called but cannot send packet now"); 5104 return 0; 5105 } 5106 5107 // for HCI INITIALIZATION 5108 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5109 hci_stack->last_cmd_opcode = cmd->opcode; 5110 5111 hci_reserve_packet_buffer(); 5112 uint8_t * packet = hci_stack->hci_packet_buffer; 5113 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5114 int err = hci_send_cmd_packet(packet, size); 5115 5116 // release packet buffer on error or for synchronous transport implementations 5117 if ((err < 0) || hci_transport_synchronous()){ 5118 hci_release_packet_buffer(); 5119 hci_emit_transport_packet_sent(); 5120 } 5121 5122 return err; 5123 } 5124 5125 /** 5126 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5127 */ 5128 int hci_send_cmd(const hci_cmd_t * cmd, ...){ 5129 va_list argptr; 5130 va_start(argptr, cmd); 5131 int res = hci_send_cmd_va_arg(cmd, argptr); 5132 va_end(argptr); 5133 return res; 5134 } 5135 5136 // Create various non-HCI events. 5137 // TODO: generalize, use table similar to hci_create_command 5138 5139 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5140 // dump packet 5141 if (dump) { 5142 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5143 } 5144 5145 // dispatch to all event handlers 5146 btstack_linked_list_iterator_t it; 5147 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5148 while (btstack_linked_list_iterator_has_next(&it)){ 5149 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5150 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5151 } 5152 } 5153 5154 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5155 if (!hci_stack->acl_packet_handler) return; 5156 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5157 } 5158 5159 #ifdef ENABLE_CLASSIC 5160 static void hci_notify_if_sco_can_send_now(void){ 5161 // notify SCO sender if waiting 5162 if (!hci_stack->sco_waiting_for_can_send_now) return; 5163 if (hci_can_send_sco_packet_now()){ 5164 hci_stack->sco_waiting_for_can_send_now = 0; 5165 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5166 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5167 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5168 } 5169 } 5170 5171 // parsing end emitting has been merged to reduce code size 5172 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5173 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5174 5175 uint8_t * eir_data; 5176 ad_context_t context; 5177 const uint8_t * name; 5178 uint8_t name_len; 5179 5180 if (size < 3) return; 5181 5182 int event_type = hci_event_packet_get_type(packet); 5183 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5184 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5185 5186 switch (event_type){ 5187 case HCI_EVENT_INQUIRY_RESULT: 5188 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5189 if (size != (3 + (num_responses * 14))) return; 5190 break; 5191 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5192 if (size != 257) return; 5193 if (num_responses != 1) return; 5194 break; 5195 default: 5196 return; 5197 } 5198 5199 // event[1] is set at the end 5200 int i; 5201 for (i=0; i<num_responses;i++){ 5202 memset(event, 0, sizeof(event)); 5203 event[0] = GAP_EVENT_INQUIRY_RESULT; 5204 uint8_t event_size = 18; // if name is not set by EIR 5205 5206 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5207 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5208 (void)memcpy(&event[9], 5209 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5210 3); // class of device 5211 (void)memcpy(&event[12], 5212 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5213 2); // clock offset 5214 5215 switch (event_type){ 5216 case HCI_EVENT_INQUIRY_RESULT: 5217 // 14,15,16,17 = 0, size 18 5218 break; 5219 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5220 event[14] = 1; 5221 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5222 // 16,17 = 0, size 18 5223 break; 5224 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5225 event[14] = 1; 5226 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5227 // EIR packets only contain a single inquiry response 5228 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5229 name = NULL; 5230 // Iterate over EIR data 5231 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5232 uint8_t data_type = ad_iterator_get_data_type(&context); 5233 uint8_t data_size = ad_iterator_get_data_len(&context); 5234 const uint8_t * data = ad_iterator_get_data(&context); 5235 // Prefer Complete Local Name over Shortened Local Name 5236 switch (data_type){ 5237 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5238 if (name) continue; 5239 /* fall through */ 5240 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5241 name = data; 5242 name_len = data_size; 5243 break; 5244 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5245 if (data_size != 8) break; 5246 event[16] = 1; 5247 memcpy(&event[17], data, 8); 5248 break; 5249 default: 5250 break; 5251 } 5252 } 5253 if (name){ 5254 event[25] = 1; 5255 // truncate name if needed 5256 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5257 event[26] = len; 5258 (void)memcpy(&event[27], name, len); 5259 event_size += len; 5260 } 5261 break; 5262 default: 5263 return; 5264 } 5265 event[1] = event_size - 2; 5266 hci_emit_event(event, event_size, 1); 5267 } 5268 } 5269 #endif 5270 5271 void hci_emit_state(void){ 5272 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5273 uint8_t event[3]; 5274 event[0] = BTSTACK_EVENT_STATE; 5275 event[1] = sizeof(event) - 2u; 5276 event[2] = hci_stack->state; 5277 hci_emit_event(event, sizeof(event), 1); 5278 } 5279 5280 #ifdef ENABLE_CLASSIC 5281 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5282 uint8_t event[13]; 5283 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5284 event[1] = sizeof(event) - 2; 5285 event[2] = status; 5286 little_endian_store_16(event, 3, con_handle); 5287 reverse_bd_addr(address, &event[5]); 5288 event[11] = 1; // ACL connection 5289 event[12] = 0; // encryption disabled 5290 hci_emit_event(event, sizeof(event), 1); 5291 } 5292 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5293 if (disable_l2cap_timeouts) return; 5294 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5295 uint8_t event[4]; 5296 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5297 event[1] = sizeof(event) - 2; 5298 little_endian_store_16(event, 2, conn->con_handle); 5299 hci_emit_event(event, sizeof(event), 1); 5300 } 5301 #endif 5302 5303 #ifdef ENABLE_BLE 5304 #ifdef ENABLE_LE_CENTRAL 5305 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){ 5306 uint8_t event[21]; 5307 event[0] = HCI_EVENT_LE_META; 5308 event[1] = sizeof(event) - 2u; 5309 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5310 event[3] = status; 5311 little_endian_store_16(event, 4, con_handle); 5312 event[6] = 0; // TODO: role 5313 event[7] = address_type; 5314 reverse_bd_addr(address, &event[8]); 5315 little_endian_store_16(event, 14, 0); // interval 5316 little_endian_store_16(event, 16, 0); // latency 5317 little_endian_store_16(event, 18, 0); // supervision timeout 5318 event[20] = 0; // master clock accuracy 5319 hci_emit_event(event, sizeof(event), 1); 5320 } 5321 #endif 5322 #endif 5323 5324 static void hci_emit_transport_packet_sent(void){ 5325 // notify upper stack that it might be possible to send again 5326 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5327 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5328 } 5329 5330 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5331 uint8_t event[6]; 5332 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5333 event[1] = sizeof(event) - 2u; 5334 event[2] = 0; // status = OK 5335 little_endian_store_16(event, 3, con_handle); 5336 event[5] = reason; 5337 hci_emit_event(event, sizeof(event), 1); 5338 } 5339 5340 static void hci_emit_nr_connections_changed(void){ 5341 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5342 uint8_t event[3]; 5343 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5344 event[1] = sizeof(event) - 2u; 5345 event[2] = nr_hci_connections(); 5346 hci_emit_event(event, sizeof(event), 1); 5347 } 5348 5349 static void hci_emit_hci_open_failed(void){ 5350 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5351 uint8_t event[2]; 5352 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5353 event[1] = sizeof(event) - 2u; 5354 hci_emit_event(event, sizeof(event), 1); 5355 } 5356 5357 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5358 log_info("hci_emit_dedicated_bonding_result %u ", status); 5359 uint8_t event[9]; 5360 int pos = 0; 5361 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5362 event[pos++] = sizeof(event) - 2u; 5363 event[pos++] = status; 5364 reverse_bd_addr(address, &event[pos]); 5365 hci_emit_event(event, sizeof(event), 1); 5366 } 5367 5368 5369 #ifdef ENABLE_CLASSIC 5370 5371 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5372 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5373 uint8_t event[5]; 5374 int pos = 0; 5375 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5376 event[pos++] = sizeof(event) - 2; 5377 little_endian_store_16(event, 2, con_handle); 5378 pos += 2; 5379 event[pos++] = level; 5380 hci_emit_event(event, sizeof(event), 1); 5381 } 5382 5383 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5384 if (!connection) return LEVEL_0; 5385 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5386 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5387 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5388 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5389 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5390 // LEVEL 4 always requires 128 bit encrytion key size 5391 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5392 security_level = LEVEL_3; 5393 } 5394 return security_level; 5395 } 5396 5397 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5398 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5399 uint8_t event[3]; 5400 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5401 event[1] = sizeof(event) - 2; 5402 event[2] = enabled; 5403 hci_emit_event(event, sizeof(event), 1); 5404 } 5405 5406 // query if remote side supports eSCO 5407 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5408 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5409 if (!connection) return 0; 5410 return (connection->remote_supported_features[0] & 1) != 0; 5411 } 5412 5413 static bool hci_ssp_supported(hci_connection_t * connection){ 5414 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5415 return (connection->bonding_flags & mask) == mask; 5416 } 5417 5418 // query if remote side supports SSP 5419 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5420 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5421 if (!connection) return 0; 5422 return hci_ssp_supported(connection) ? 1 : 0; 5423 } 5424 5425 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5426 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5427 } 5428 5429 // GAP API 5430 /** 5431 * @bbrief enable/disable bonding. default is enabled 5432 * @praram enabled 5433 */ 5434 void gap_set_bondable_mode(int enable){ 5435 hci_stack->bondable = enable ? 1 : 0; 5436 } 5437 /** 5438 * @brief Get bondable mode. 5439 * @return 1 if bondable 5440 */ 5441 int gap_get_bondable_mode(void){ 5442 return hci_stack->bondable; 5443 } 5444 5445 /** 5446 * @brief map link keys to security levels 5447 */ 5448 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5449 switch (link_key_type){ 5450 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5451 return LEVEL_4; 5452 case COMBINATION_KEY: 5453 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5454 return LEVEL_3; 5455 default: 5456 return LEVEL_2; 5457 } 5458 } 5459 5460 /** 5461 * @brief map link keys to secure connection yes/no 5462 */ 5463 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5464 switch (link_key_type){ 5465 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5466 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5467 return 1; 5468 default: 5469 return 0; 5470 } 5471 } 5472 5473 /** 5474 * @brief map link keys to authenticated 5475 */ 5476 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5477 switch (link_key_type){ 5478 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5479 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5480 return 1; 5481 default: 5482 return 0; 5483 } 5484 } 5485 5486 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5487 log_info("gap_mitm_protection_required_for_security_level %u", level); 5488 return level > LEVEL_2; 5489 } 5490 5491 /** 5492 * @brief get current security level 5493 */ 5494 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5495 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5496 if (!connection) return LEVEL_0; 5497 return gap_security_level_for_connection(connection); 5498 } 5499 5500 /** 5501 * @brief request connection to device to 5502 * @result GAP_AUTHENTICATION_RESULT 5503 */ 5504 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5505 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5506 if (!connection){ 5507 hci_emit_security_level(con_handle, LEVEL_0); 5508 return; 5509 } 5510 5511 btstack_assert(hci_is_le_connection(connection) == false); 5512 5513 // Core Spec 5.2, GAP 5.2.2: "When in Secure Connections Only mode, all services (except those allowed to have Security Mode 4, Level 0) 5514 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5515 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5516 requested_level = LEVEL_4; 5517 } 5518 5519 gap_security_level_t current_level = gap_security_level(con_handle); 5520 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5521 requested_level, connection->requested_security_level, current_level); 5522 5523 // authentication active if authentication request was sent or planned level > 0 5524 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5525 if (authentication_active){ 5526 // authentication already active 5527 if (connection->requested_security_level < requested_level){ 5528 // increase requested level as new level is higher 5529 // TODO: handle re-authentication when done 5530 connection->requested_security_level = requested_level; 5531 } 5532 } else { 5533 // no request active, notify if security sufficient 5534 if (requested_level <= current_level){ 5535 hci_emit_security_level(con_handle, current_level); 5536 return; 5537 } 5538 5539 // store request 5540 connection->requested_security_level = requested_level; 5541 5542 // start to authenticate connection 5543 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5544 hci_run(); 5545 } 5546 } 5547 5548 /** 5549 * @brief start dedicated bonding with device. disconnect after bonding 5550 * @param device 5551 * @param request MITM protection 5552 * @result GAP_DEDICATED_BONDING_COMPLETE 5553 */ 5554 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5555 5556 // create connection state machine 5557 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5558 5559 if (!connection){ 5560 return BTSTACK_MEMORY_ALLOC_FAILED; 5561 } 5562 5563 // delete linkn key 5564 gap_drop_link_key_for_bd_addr(device); 5565 5566 // configure LEVEL_2/3, dedicated bonding 5567 connection->state = SEND_CREATE_CONNECTION; 5568 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5569 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5570 connection->bonding_flags = BONDING_DEDICATED; 5571 5572 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5573 5574 // handle: connnection failure (connection complete != ok) 5575 // handle: authentication failure 5576 // handle: disconnect on done 5577 5578 hci_run(); 5579 5580 return 0; 5581 } 5582 #endif 5583 5584 void gap_set_local_name(const char * local_name){ 5585 hci_stack->local_name = local_name; 5586 } 5587 5588 5589 #ifdef ENABLE_BLE 5590 5591 #ifdef ENABLE_LE_CENTRAL 5592 void gap_start_scan(void){ 5593 hci_stack->le_scanning_enabled = true; 5594 hci_run(); 5595 } 5596 5597 void gap_stop_scan(void){ 5598 hci_stack->le_scanning_enabled = false; 5599 hci_run(); 5600 } 5601 5602 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5603 hci_stack->le_scan_type = scan_type; 5604 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5605 hci_stack->le_scan_interval = scan_interval; 5606 hci_stack->le_scan_window = scan_window; 5607 hci_stack->le_scanning_param_update = true; 5608 hci_run(); 5609 } 5610 5611 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5612 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5613 } 5614 5615 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5616 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5617 if (!conn){ 5618 // disallow if le connection is already outgoing 5619 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5620 log_error("le connection already active"); 5621 return ERROR_CODE_COMMAND_DISALLOWED; 5622 } 5623 5624 log_info("gap_connect: no connection exists yet, creating context"); 5625 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5626 if (!conn){ 5627 // notify client that alloc failed 5628 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5629 log_info("gap_connect: failed to alloc hci_connection_t"); 5630 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5631 } 5632 5633 // set le connecting state 5634 if (hci_is_le_connection_type(addr_type)){ 5635 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5636 } 5637 5638 conn->state = SEND_CREATE_CONNECTION; 5639 log_info("gap_connect: send create connection next"); 5640 hci_run(); 5641 return ERROR_CODE_SUCCESS; 5642 } 5643 5644 if (!hci_is_le_connection(conn) || 5645 (conn->state == SEND_CREATE_CONNECTION) || 5646 (conn->state == SENT_CREATE_CONNECTION)) { 5647 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5648 log_error("gap_connect: classic connection or connect is already being created"); 5649 return GATT_CLIENT_IN_WRONG_STATE; 5650 } 5651 5652 // check if connection was just disconnected 5653 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5654 log_info("gap_connect: send create connection (again)"); 5655 conn->state = SEND_CREATE_CONNECTION; 5656 hci_run(); 5657 return ERROR_CODE_SUCCESS; 5658 } 5659 5660 log_info("gap_connect: context exists with state %u", conn->state); 5661 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5662 hci_run(); 5663 return ERROR_CODE_SUCCESS; 5664 } 5665 5666 // @assumption: only a single outgoing LE Connection exists 5667 static hci_connection_t * gap_get_outgoing_connection(void){ 5668 btstack_linked_item_t *it; 5669 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5670 hci_connection_t * conn = (hci_connection_t *) it; 5671 if (!hci_is_le_connection(conn)) continue; 5672 switch (conn->state){ 5673 case SEND_CREATE_CONNECTION: 5674 case SENT_CREATE_CONNECTION: 5675 case SENT_CANCEL_CONNECTION: 5676 return conn; 5677 default: 5678 break; 5679 }; 5680 } 5681 return NULL; 5682 } 5683 5684 uint8_t gap_connect_cancel(void){ 5685 hci_connection_t * conn = gap_get_outgoing_connection(); 5686 if (!conn) return 0; 5687 switch (conn->state){ 5688 case SEND_CREATE_CONNECTION: 5689 // skip sending create connection and emit event instead 5690 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5691 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5692 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5693 btstack_memory_hci_connection_free( conn ); 5694 break; 5695 case SENT_CREATE_CONNECTION: 5696 // request to send cancel connection 5697 conn->state = SEND_CANCEL_CONNECTION; 5698 hci_run(); 5699 break; 5700 default: 5701 break; 5702 } 5703 return 0; 5704 } 5705 #endif 5706 5707 #ifdef ENABLE_LE_CENTRAL 5708 /** 5709 * @brief Set connection parameters for outgoing connections 5710 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5711 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5712 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5713 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5714 * @param conn_latency, default: 4 5715 * @param supervision_timeout (unit: 10ms), default: 720 ms 5716 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5717 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5718 */ 5719 5720 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5721 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5722 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5723 hci_stack->le_connection_scan_interval = conn_scan_interval; 5724 hci_stack->le_connection_scan_window = conn_scan_window; 5725 hci_stack->le_connection_interval_min = conn_interval_min; 5726 hci_stack->le_connection_interval_max = conn_interval_max; 5727 hci_stack->le_connection_latency = conn_latency; 5728 hci_stack->le_supervision_timeout = supervision_timeout; 5729 hci_stack->le_minimum_ce_length = min_ce_length; 5730 hci_stack->le_maximum_ce_length = max_ce_length; 5731 } 5732 #endif 5733 5734 /** 5735 * @brief Updates the connection parameters for a given LE connection 5736 * @param handle 5737 * @param conn_interval_min (unit: 1.25ms) 5738 * @param conn_interval_max (unit: 1.25ms) 5739 * @param conn_latency 5740 * @param supervision_timeout (unit: 10ms) 5741 * @returns 0 if ok 5742 */ 5743 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5744 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5745 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5746 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5747 connection->le_conn_interval_min = conn_interval_min; 5748 connection->le_conn_interval_max = conn_interval_max; 5749 connection->le_conn_latency = conn_latency; 5750 connection->le_supervision_timeout = supervision_timeout; 5751 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5752 hci_run(); 5753 return 0; 5754 } 5755 5756 /** 5757 * @brief Request an update of the connection parameter for a given LE connection 5758 * @param handle 5759 * @param conn_interval_min (unit: 1.25ms) 5760 * @param conn_interval_max (unit: 1.25ms) 5761 * @param conn_latency 5762 * @param supervision_timeout (unit: 10ms) 5763 * @returns 0 if ok 5764 */ 5765 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5766 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5767 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5768 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5769 connection->le_conn_interval_min = conn_interval_min; 5770 connection->le_conn_interval_max = conn_interval_max; 5771 connection->le_conn_latency = conn_latency; 5772 connection->le_supervision_timeout = supervision_timeout; 5773 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5774 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5775 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5776 return 0; 5777 } 5778 5779 #ifdef ENABLE_LE_PERIPHERAL 5780 5781 /** 5782 * @brief Set Advertisement Data 5783 * @param advertising_data_length 5784 * @param advertising_data (max 31 octets) 5785 * @note data is not copied, pointer has to stay valid 5786 */ 5787 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5788 hci_stack->le_advertisements_data_len = advertising_data_length; 5789 hci_stack->le_advertisements_data = advertising_data; 5790 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5791 hci_run(); 5792 } 5793 5794 /** 5795 * @brief Set Scan Response Data 5796 * @param advertising_data_length 5797 * @param advertising_data (max 31 octets) 5798 * @note data is not copied, pointer has to stay valid 5799 */ 5800 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5801 hci_stack->le_scan_response_data_len = scan_response_data_length; 5802 hci_stack->le_scan_response_data = scan_response_data; 5803 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5804 hci_run(); 5805 } 5806 5807 /** 5808 * @brief Set Advertisement Parameters 5809 * @param adv_int_min 5810 * @param adv_int_max 5811 * @param adv_type 5812 * @param direct_address_type 5813 * @param direct_address 5814 * @param channel_map 5815 * @param filter_policy 5816 * 5817 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5818 */ 5819 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5820 uint8_t direct_address_typ, bd_addr_t direct_address, 5821 uint8_t channel_map, uint8_t filter_policy) { 5822 5823 hci_stack->le_advertisements_interval_min = adv_int_min; 5824 hci_stack->le_advertisements_interval_max = adv_int_max; 5825 hci_stack->le_advertisements_type = adv_type; 5826 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5827 hci_stack->le_advertisements_channel_map = channel_map; 5828 hci_stack->le_advertisements_filter_policy = filter_policy; 5829 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5830 6); 5831 5832 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 5833 hci_run(); 5834 } 5835 5836 /** 5837 * @brief Enable/Disable Advertisements 5838 * @param enabled 5839 */ 5840 void gap_advertisements_enable(int enabled){ 5841 hci_stack->le_advertisements_enabled = enabled != 0; 5842 hci_update_advertisements_enabled_for_current_roles(); 5843 hci_run(); 5844 } 5845 5846 #endif 5847 5848 void hci_le_set_own_address_type(uint8_t own_address_type){ 5849 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5850 if (own_address_type == hci_stack->le_own_addr_type) return; 5851 hci_stack->le_own_addr_type = own_address_type; 5852 5853 #ifdef ENABLE_LE_PERIPHERAL 5854 // update advertisement parameters, too 5855 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5856 hci_run(); 5857 #endif 5858 #ifdef ENABLE_LE_CENTRAL 5859 // note: we don't update scan parameters or modify ongoing connection attempts 5860 #endif 5861 } 5862 5863 #endif 5864 5865 uint8_t gap_disconnect(hci_con_handle_t handle){ 5866 hci_connection_t * conn = hci_connection_for_handle(handle); 5867 if (!conn){ 5868 hci_emit_disconnection_complete(handle, 0); 5869 return 0; 5870 } 5871 // ignore if already disconnected 5872 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5873 return 0; 5874 } 5875 conn->state = SEND_DISCONNECT; 5876 hci_run(); 5877 return 0; 5878 } 5879 5880 int gap_read_rssi(hci_con_handle_t con_handle){ 5881 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5882 if (hci_connection == NULL) return 0; 5883 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 5884 hci_run(); 5885 return 1; 5886 } 5887 5888 /** 5889 * @brief Get connection type 5890 * @param con_handle 5891 * @result connection_type 5892 */ 5893 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5894 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5895 if (!conn) return GAP_CONNECTION_INVALID; 5896 switch (conn->address_type){ 5897 case BD_ADDR_TYPE_LE_PUBLIC: 5898 case BD_ADDR_TYPE_LE_RANDOM: 5899 return GAP_CONNECTION_LE; 5900 case BD_ADDR_TYPE_SCO: 5901 return GAP_CONNECTION_SCO; 5902 case BD_ADDR_TYPE_ACL: 5903 return GAP_CONNECTION_ACL; 5904 default: 5905 return GAP_CONNECTION_INVALID; 5906 } 5907 } 5908 5909 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5910 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5911 if (!conn) return HCI_ROLE_INVALID; 5912 return (hci_role_t) conn->role; 5913 } 5914 5915 5916 #ifdef ENABLE_CLASSIC 5917 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5918 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5919 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5920 conn->request_role = role; 5921 hci_run(); 5922 return ERROR_CODE_SUCCESS; 5923 } 5924 #endif 5925 5926 #ifdef ENABLE_BLE 5927 5928 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){ 5929 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5930 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5931 5932 conn->le_phy_update_all_phys = all_phys; 5933 conn->le_phy_update_tx_phys = tx_phys; 5934 conn->le_phy_update_rx_phys = rx_phys; 5935 conn->le_phy_update_phy_options = phy_options; 5936 5937 hci_run(); 5938 5939 return 0; 5940 } 5941 5942 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5943 // check if already in list 5944 btstack_linked_list_iterator_t it; 5945 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5946 while (btstack_linked_list_iterator_has_next(&it)) { 5947 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5948 if (entry->address_type != address_type) { 5949 continue; 5950 } 5951 if (memcmp(entry->address, address, 6) != 0) { 5952 continue; 5953 } 5954 // disallow if already scheduled to add 5955 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5956 return ERROR_CODE_COMMAND_DISALLOWED; 5957 } 5958 // still on controller, but scheduled to remove -> re-add 5959 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5960 return ERROR_CODE_SUCCESS; 5961 } 5962 // alloc and add to list 5963 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5964 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5965 entry->address_type = address_type; 5966 (void)memcpy(entry->address, address, 6); 5967 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5968 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5969 return ERROR_CODE_SUCCESS; 5970 } 5971 5972 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5973 btstack_linked_list_iterator_t it; 5974 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5975 while (btstack_linked_list_iterator_has_next(&it)){ 5976 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5977 if (entry->address_type != address_type) { 5978 continue; 5979 } 5980 if (memcmp(entry->address, address, 6) != 0) { 5981 continue; 5982 } 5983 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5984 // remove from controller if already present 5985 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5986 } else { 5987 // directly remove entry from whitelist 5988 btstack_linked_list_iterator_remove(&it); 5989 btstack_memory_whitelist_entry_free(entry); 5990 } 5991 return ERROR_CODE_SUCCESS; 5992 } 5993 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5994 } 5995 5996 static void hci_whitelist_clear(void){ 5997 btstack_linked_list_iterator_t it; 5998 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5999 while (btstack_linked_list_iterator_has_next(&it)){ 6000 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6001 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6002 // remove from controller if already present 6003 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6004 continue; 6005 } 6006 // directly remove entry from whitelist 6007 btstack_linked_list_iterator_remove(&it); 6008 btstack_memory_whitelist_entry_free(entry); 6009 } 6010 } 6011 6012 /** 6013 * @brief Clear Whitelist 6014 * @returns 0 if ok 6015 */ 6016 uint8_t gap_whitelist_clear(void){ 6017 hci_whitelist_clear(); 6018 hci_run(); 6019 return ERROR_CODE_SUCCESS; 6020 } 6021 6022 /** 6023 * @brief Add Device to Whitelist 6024 * @param address_typ 6025 * @param address 6026 * @returns 0 if ok 6027 */ 6028 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6029 uint8_t status = hci_whitelist_add(address_type, address); 6030 if (status){ 6031 return status; 6032 } 6033 hci_run(); 6034 return ERROR_CODE_SUCCESS; 6035 } 6036 6037 /** 6038 * @brief Remove Device from Whitelist 6039 * @param address_typ 6040 * @param address 6041 * @returns 0 if ok 6042 */ 6043 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6044 uint8_t status = hci_whitelist_remove(address_type, address); 6045 if (status){ 6046 return status; 6047 } 6048 hci_run(); 6049 return ERROR_CODE_SUCCESS; 6050 } 6051 6052 #ifdef ENABLE_LE_CENTRAL 6053 /** 6054 * @brief Connect with Whitelist 6055 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6056 * @returns - if ok 6057 */ 6058 uint8_t gap_connect_with_whitelist(void){ 6059 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6060 return ERROR_CODE_COMMAND_DISALLOWED; 6061 } 6062 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6063 hci_run(); 6064 return ERROR_CODE_SUCCESS; 6065 } 6066 6067 /** 6068 * @brief Auto Connection Establishment - Start Connecting to device 6069 * @param address_typ 6070 * @param address 6071 * @returns 0 if ok 6072 */ 6073 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6074 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6075 return ERROR_CODE_COMMAND_DISALLOWED; 6076 } 6077 6078 uint8_t status = hci_whitelist_add(address_type, address); 6079 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6080 return status; 6081 } 6082 6083 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6084 6085 hci_run(); 6086 return ERROR_CODE_SUCCESS; 6087 } 6088 6089 /** 6090 * @brief Auto Connection Establishment - Stop Connecting to device 6091 * @param address_typ 6092 * @param address 6093 * @returns 0 if ok 6094 */ 6095 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6096 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6097 return ERROR_CODE_COMMAND_DISALLOWED; 6098 } 6099 6100 hci_whitelist_remove(address_type, address); 6101 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6102 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6103 } 6104 hci_run(); 6105 return 0; 6106 } 6107 6108 /** 6109 * @brief Auto Connection Establishment - Stop everything 6110 * @note Convenience function to stop all active auto connection attempts 6111 */ 6112 uint8_t gap_auto_connection_stop_all(void){ 6113 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6114 return ERROR_CODE_COMMAND_DISALLOWED; 6115 } 6116 hci_whitelist_clear(); 6117 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6118 hci_run(); 6119 return ERROR_CODE_SUCCESS; 6120 } 6121 6122 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6123 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6124 if (!conn) return 0; 6125 return conn->le_connection_interval; 6126 } 6127 #endif 6128 #endif 6129 6130 #ifdef ENABLE_CLASSIC 6131 /** 6132 * @brief Set Extended Inquiry Response data 6133 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6134 * @note has to be done before stack starts up 6135 */ 6136 void gap_set_extended_inquiry_response(const uint8_t * data){ 6137 hci_stack->eir_data = data; 6138 } 6139 6140 /** 6141 * @brief Start GAP Classic Inquiry 6142 * @param duration in 1.28s units 6143 * @return 0 if ok 6144 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6145 */ 6146 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6147 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6148 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6149 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6150 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6151 } 6152 hci_stack->inquiry_state = duration_in_1280ms_units; 6153 hci_run(); 6154 return 0; 6155 } 6156 6157 /** 6158 * @brief Stop GAP Classic Inquiry 6159 * @returns 0 if ok 6160 */ 6161 int gap_inquiry_stop(void){ 6162 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6163 // emit inquiry complete event, before it even started 6164 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6165 hci_emit_event(event, sizeof(event), 1); 6166 return 0; 6167 } 6168 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6169 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6170 hci_run(); 6171 return 0; 6172 } 6173 6174 void gap_inquiry_set_lap(uint32_t lap){ 6175 hci_stack->inquiry_lap = lap; 6176 } 6177 6178 6179 /** 6180 * @brief Remote Name Request 6181 * @param addr 6182 * @param page_scan_repetition_mode 6183 * @param clock_offset only used when bit 15 is set 6184 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6185 */ 6186 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6187 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6188 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6189 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6190 hci_stack->remote_name_clock_offset = clock_offset; 6191 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6192 hci_run(); 6193 return 0; 6194 } 6195 6196 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6197 hci_stack->gap_pairing_state = state; 6198 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6199 hci_run(); 6200 return 0; 6201 } 6202 6203 /** 6204 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6205 * @param addr 6206 * @param pin_data 6207 * @param pin_len 6208 * @return 0 if ok 6209 */ 6210 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6211 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6212 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6213 hci_stack->gap_pairing_pin_len = pin_len; 6214 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6215 } 6216 6217 /** 6218 * @brief Legacy Pairing Pin Code Response 6219 * @param addr 6220 * @param pin 6221 * @return 0 if ok 6222 */ 6223 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6224 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6225 } 6226 6227 /** 6228 * @brief Abort Legacy Pairing 6229 * @param addr 6230 * @param pin 6231 * @return 0 if ok 6232 */ 6233 int gap_pin_code_negative(bd_addr_t addr){ 6234 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6235 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6236 } 6237 6238 /** 6239 * @brief SSP Passkey Response 6240 * @param addr 6241 * @param passkey 6242 * @return 0 if ok 6243 */ 6244 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6245 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6246 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6247 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6248 } 6249 6250 /** 6251 * @brief Abort SSP Passkey Entry/Pairing 6252 * @param addr 6253 * @param pin 6254 * @return 0 if ok 6255 */ 6256 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6257 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6258 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6259 } 6260 6261 /** 6262 * @brief Accept SSP Numeric Comparison 6263 * @param addr 6264 * @param passkey 6265 * @return 0 if ok 6266 */ 6267 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6268 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6269 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6270 } 6271 6272 /** 6273 * @brief Abort SSP Numeric Comparison/Pairing 6274 * @param addr 6275 * @param pin 6276 * @return 0 if ok 6277 */ 6278 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6279 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6280 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6281 } 6282 6283 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6284 6285 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6286 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6287 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6288 connectionSetAuthenticationFlags(conn, flag); 6289 hci_run(); 6290 return ERROR_CODE_SUCCESS; 6291 } 6292 6293 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6294 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6295 } 6296 6297 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6298 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6299 } 6300 #endif 6301 6302 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6303 /** 6304 * @brief Report Remote OOB Data 6305 * @param bd_addr 6306 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6307 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6308 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6309 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6310 */ 6311 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){ 6312 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6313 if (connection == NULL) { 6314 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6315 } 6316 connection->classic_oob_c_192 = c_192; 6317 connection->classic_oob_r_192 = r_192; 6318 connection->classic_oob_c_256 = c_256; 6319 connection->classic_oob_r_256 = r_256; 6320 return ERROR_CODE_SUCCESS; 6321 } 6322 /** 6323 * @brief Generate new OOB data 6324 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6325 */ 6326 void gap_ssp_generate_oob_data(void){ 6327 hci_stack->classic_read_local_oob_data = true; 6328 hci_run(); 6329 } 6330 6331 #endif 6332 6333 /** 6334 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6335 * @param inquiry_mode see bluetooth_defines.h 6336 */ 6337 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6338 hci_stack->inquiry_mode = inquiry_mode; 6339 } 6340 6341 /** 6342 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6343 */ 6344 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6345 hci_stack->sco_voice_setting = voice_setting; 6346 } 6347 6348 /** 6349 * @brief Get SCO Voice Setting 6350 * @return current voice setting 6351 */ 6352 uint16_t hci_get_sco_voice_setting(void){ 6353 return hci_stack->sco_voice_setting; 6354 } 6355 6356 static int hci_have_usb_transport(void){ 6357 if (!hci_stack->hci_transport) return 0; 6358 const char * transport_name = hci_stack->hci_transport->name; 6359 if (!transport_name) return 0; 6360 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6361 } 6362 6363 /** @brief Get SCO packet length for current SCO Voice setting 6364 * @note Using SCO packets of the exact length is required for USB transfer 6365 * @return Length of SCO packets in bytes (not audio frames) 6366 */ 6367 int hci_get_sco_packet_length(void){ 6368 int sco_packet_length = 0; 6369 6370 #ifdef ENABLE_SCO_OVER_HCI 6371 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6372 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6373 6374 if (hci_have_usb_transport()){ 6375 // see Core Spec for H2 USB Transfer. 6376 // 3 byte SCO header + 24 bytes per connection 6377 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6378 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6379 } else { 6380 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6381 sco_packet_length = 3 + 60 * multiplier; 6382 // assert that it still fits inside an SCO buffer 6383 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6384 sco_packet_length = 3 + 60; 6385 } 6386 } 6387 #endif 6388 6389 #ifdef HAVE_SCO_TRANSPORT 6390 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6391 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6392 sco_packet_length = 3 + 60 * multiplier; 6393 #endif 6394 return sco_packet_length; 6395 } 6396 6397 /** 6398 * @brief Sets the master/slave policy 6399 * @param policy (0: attempt to become master, 1: let connecting device decide) 6400 */ 6401 void hci_set_master_slave_policy(uint8_t policy){ 6402 hci_stack->master_slave_policy = policy; 6403 } 6404 6405 #endif 6406 6407 HCI_STATE hci_get_state(void){ 6408 return hci_stack->state; 6409 } 6410 6411 #ifdef ENABLE_CLASSIC 6412 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6413 hci_stack->gap_classic_accept_callback = accept_callback; 6414 } 6415 #endif 6416 6417 /** 6418 * @brief Set callback for Bluetooth Hardware Error 6419 */ 6420 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6421 hci_stack->hardware_error_callback = fn; 6422 } 6423 6424 void hci_disconnect_all(void){ 6425 btstack_linked_list_iterator_t it; 6426 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6427 while (btstack_linked_list_iterator_has_next(&it)){ 6428 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6429 if (con->state == SENT_DISCONNECT) continue; 6430 con->state = SEND_DISCONNECT; 6431 } 6432 hci_run(); 6433 } 6434 6435 uint16_t hci_get_manufacturer(void){ 6436 return hci_stack->manufacturer; 6437 } 6438 6439 #ifdef ENABLE_BLE 6440 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6441 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6442 if (!hci_con) return NULL; 6443 return &hci_con->sm_connection; 6444 } 6445 6446 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6447 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6448 #endif 6449 6450 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6451 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6452 if (hci_connection == NULL) return 0; 6453 if (hci_is_le_connection(hci_connection)){ 6454 #ifdef ENABLE_BLE 6455 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6456 if (sm_conn->sm_connection_encrypted) { 6457 return sm_conn->sm_actual_encryption_key_size; 6458 } 6459 #endif 6460 } else { 6461 #ifdef ENABLE_CLASSIC 6462 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6463 return hci_connection->encryption_key_size; 6464 } 6465 #endif 6466 } 6467 return 0; 6468 } 6469 6470 int gap_authenticated(hci_con_handle_t con_handle){ 6471 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6472 if (hci_connection == NULL) return 0; 6473 6474 switch (hci_connection->address_type){ 6475 #ifdef ENABLE_BLE 6476 case BD_ADDR_TYPE_LE_PUBLIC: 6477 case BD_ADDR_TYPE_LE_RANDOM: 6478 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6479 return hci_connection->sm_connection.sm_connection_authenticated; 6480 #endif 6481 #ifdef ENABLE_CLASSIC 6482 case BD_ADDR_TYPE_SCO: 6483 case BD_ADDR_TYPE_ACL: 6484 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6485 #endif 6486 default: 6487 return 0; 6488 } 6489 } 6490 6491 int gap_secure_connection(hci_con_handle_t con_handle){ 6492 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6493 if (hci_connection == NULL) return 0; 6494 6495 switch (hci_connection->address_type){ 6496 #ifdef ENABLE_BLE 6497 case BD_ADDR_TYPE_LE_PUBLIC: 6498 case BD_ADDR_TYPE_LE_RANDOM: 6499 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6500 return hci_connection->sm_connection.sm_connection_sc; 6501 #endif 6502 #ifdef ENABLE_CLASSIC 6503 case BD_ADDR_TYPE_SCO: 6504 case BD_ADDR_TYPE_ACL: 6505 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6506 #endif 6507 default: 6508 return 0; 6509 } 6510 } 6511 6512 bool gap_bonded(hci_con_handle_t con_handle){ 6513 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6514 if (hci_connection == NULL) return 0; 6515 6516 #ifdef ENABLE_CLASSIC 6517 link_key_t link_key; 6518 link_key_type_t link_key_type; 6519 #endif 6520 switch (hci_connection->address_type){ 6521 #ifdef ENABLE_BLE 6522 case BD_ADDR_TYPE_LE_PUBLIC: 6523 case BD_ADDR_TYPE_LE_RANDOM: 6524 return hci_connection->sm_connection.sm_le_db_index >= 0; 6525 #endif 6526 #ifdef ENABLE_CLASSIC 6527 case BD_ADDR_TYPE_SCO: 6528 case BD_ADDR_TYPE_ACL: 6529 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6530 #endif 6531 default: 6532 return false; 6533 } 6534 } 6535 6536 #ifdef ENABLE_BLE 6537 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6538 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6539 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6540 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6541 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6542 return sm_conn->sm_connection_authorization_state; 6543 } 6544 #endif 6545 6546 #ifdef ENABLE_CLASSIC 6547 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){ 6548 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6549 if (!conn) return GAP_CONNECTION_INVALID; 6550 conn->sniff_min_interval = sniff_min_interval; 6551 conn->sniff_max_interval = sniff_max_interval; 6552 conn->sniff_attempt = sniff_attempt; 6553 conn->sniff_timeout = sniff_timeout; 6554 hci_run(); 6555 return 0; 6556 } 6557 6558 /** 6559 * @brief Exit Sniff mode 6560 * @param con_handle 6561 @ @return 0 if ok 6562 */ 6563 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6564 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6565 if (!conn) return GAP_CONNECTION_INVALID; 6566 conn->sniff_min_interval = 0xffff; 6567 hci_run(); 6568 return 0; 6569 } 6570 6571 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){ 6572 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6573 if (!conn) return GAP_CONNECTION_INVALID; 6574 conn->sniff_subrating_max_latency = max_latency; 6575 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6576 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6577 hci_run(); 6578 return ERROR_CODE_SUCCESS; 6579 } 6580 6581 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){ 6582 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6583 if (!conn) return GAP_CONNECTION_INVALID; 6584 conn->qos_service_type = service_type; 6585 conn->qos_token_rate = token_rate; 6586 conn->qos_peak_bandwidth = peak_bandwidth; 6587 conn->qos_latency = latency; 6588 conn->qos_delay_variation = delay_variation; 6589 hci_run(); 6590 return ERROR_CODE_SUCCESS; 6591 } 6592 6593 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6594 hci_stack->new_page_scan_interval = page_scan_interval; 6595 hci_stack->new_page_scan_window = page_scan_window; 6596 hci_run(); 6597 } 6598 6599 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6600 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6601 hci_run(); 6602 } 6603 6604 #endif 6605 6606 void hci_halting_defer(void){ 6607 if (hci_stack->state != HCI_STATE_HALTING) return; 6608 switch (hci_stack->substate){ 6609 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6610 case HCI_HALTING_CLOSE: 6611 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6612 break; 6613 default: 6614 break; 6615 } 6616 } 6617 6618 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6619 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6620 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6621 if (le_device_db_index >= le_device_db_max_count()) return; 6622 uint8_t offset = le_device_db_index >> 3; 6623 uint8_t mask = 1 << (le_device_db_index & 7); 6624 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6625 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6626 // note: go back to remove entries, otherwise, a remove + add will skip the add 6627 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6628 } 6629 } 6630 6631 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6632 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6633 if (le_device_db_index >= le_device_db_max_count()) return; 6634 uint8_t offset = le_device_db_index >> 3; 6635 uint8_t mask = 1 << (le_device_db_index & 7); 6636 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6637 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6638 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6639 } 6640 } 6641 6642 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6643 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6644 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6645 } 6646 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6647 // restart le resolving list update 6648 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6649 } 6650 return ERROR_CODE_SUCCESS; 6651 } 6652 #endif 6653 6654 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6655 void hci_setup_test_connections_fuzz(void){ 6656 hci_connection_t * conn; 6657 6658 // default address: 66:55:44:33:00:01 6659 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6660 6661 // setup Controller info 6662 hci_stack->num_cmd_packets = 255; 6663 hci_stack->acl_packets_total_num = 255; 6664 6665 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6666 addr[5] = 0x01; 6667 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6668 conn->con_handle = addr[5]; 6669 conn->role = HCI_ROLE_SLAVE; 6670 conn->state = RECEIVED_CONNECTION_REQUEST; 6671 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6672 6673 // setup incoming Classic SCO connection with con handle 0x0002 6674 addr[5] = 0x02; 6675 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6676 conn->con_handle = addr[5]; 6677 conn->role = HCI_ROLE_SLAVE; 6678 conn->state = RECEIVED_CONNECTION_REQUEST; 6679 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6680 6681 // setup ready Classic ACL connection with con handle 0x0003 6682 addr[5] = 0x03; 6683 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6684 conn->con_handle = addr[5]; 6685 conn->role = HCI_ROLE_SLAVE; 6686 conn->state = OPEN; 6687 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6688 6689 // setup ready Classic SCO connection with con handle 0x0004 6690 addr[5] = 0x04; 6691 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6692 conn->con_handle = addr[5]; 6693 conn->role = HCI_ROLE_SLAVE; 6694 conn->state = OPEN; 6695 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6696 6697 // setup ready LE ACL connection with con handle 0x005 and public address 6698 addr[5] = 0x05; 6699 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6700 conn->con_handle = addr[5]; 6701 conn->role = HCI_ROLE_SLAVE; 6702 conn->state = OPEN; 6703 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6704 conn->sm_connection.sm_connection_encrypted = 1; 6705 } 6706 6707 void hci_free_connections_fuzz(void){ 6708 btstack_linked_list_iterator_t it; 6709 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6710 while (btstack_linked_list_iterator_has_next(&it)){ 6711 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6712 btstack_linked_list_iterator_remove(&it); 6713 btstack_memory_hci_connection_free(con); 6714 } 6715 } 6716 void hci_simulate_working_fuzz(void){ 6717 hci_init_done(); 6718 hci_stack->num_cmd_packets = 255; 6719 } 6720 #endif 6721