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_ACTIVE 0x80 119 #define GAP_INQUIRY_STATE_IDLE 0 120 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 121 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 122 123 // GAP Remote Name Request 124 #define GAP_REMOTE_NAME_STATE_IDLE 0 125 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 126 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 127 128 // GAP Pairing 129 #define GAP_PAIRING_STATE_IDLE 0 130 #define GAP_PAIRING_STATE_SEND_PIN 1 131 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 132 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 133 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 134 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 136 137 138 // prototypes 139 #ifdef ENABLE_CLASSIC 140 static void hci_update_scan_enable(void); 141 static void hci_emit_discoverable_enabled(uint8_t enabled); 142 static int hci_local_ssp_activated(void); 143 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 144 static bool hci_ssp_supported(hci_connection_t * connection); 145 static void hci_notify_if_sco_can_send_now(void); 146 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 147 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 148 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 149 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 150 static void hci_connection_timestamp(hci_connection_t *connection); 151 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 152 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 153 #endif 154 155 static int hci_power_control_on(void); 156 static void hci_power_control_off(void); 157 static void hci_state_reset(void); 158 static void hci_emit_transport_packet_sent(void); 159 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 160 static void hci_emit_nr_connections_changed(void); 161 static void hci_emit_hci_open_failed(void); 162 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 163 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 164 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 165 static void hci_run(void); 166 static int hci_is_le_connection(hci_connection_t * connection); 167 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 168 169 #ifdef ENABLE_CLASSIC 170 static int hci_have_usb_transport(void); 171 #endif 172 173 #ifdef ENABLE_BLE 174 #ifdef ENABLE_LE_CENTRAL 175 // called from test/ble_client/advertising_data_parser.c 176 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 177 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 178 static hci_connection_t * gap_get_outgoing_connection(void); 179 #endif 180 #endif 181 182 // the STACK is here 183 #ifndef HAVE_MALLOC 184 static hci_stack_t hci_stack_static; 185 #endif 186 static hci_stack_t * hci_stack = NULL; 187 188 #ifdef ENABLE_CLASSIC 189 // default name 190 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 191 192 // test helper 193 static uint8_t disable_l2cap_timeouts = 0; 194 #endif 195 196 /** 197 * create connection for given address 198 * 199 * @return connection OR NULL, if no memory left 200 */ 201 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 202 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 203 hci_connection_t * conn = btstack_memory_hci_connection_get(); 204 if (!conn) return NULL; 205 bd_addr_copy(conn->address, addr); 206 conn->role = HCI_ROLE_INVALID; 207 conn->address_type = addr_type; 208 conn->con_handle = 0xffff; 209 conn->authentication_flags = AUTH_FLAGS_NONE; 210 conn->bonding_flags = 0; 211 conn->requested_security_level = LEVEL_0; 212 #ifdef ENABLE_CLASSIC 213 conn->request_role = HCI_ROLE_INVALID; 214 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 215 btstack_run_loop_set_timer_context(&conn->timeout, conn); 216 hci_connection_timestamp(conn); 217 #endif 218 conn->acl_recombination_length = 0; 219 conn->acl_recombination_pos = 0; 220 conn->num_packets_sent = 0; 221 222 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 223 #ifdef ENABLE_BLE 224 conn->le_phy_update_all_phys = 0xff; 225 #endif 226 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 227 conn->le_max_tx_octets = 27; 228 #endif 229 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 230 return conn; 231 } 232 233 234 /** 235 * get le connection parameter range 236 * 237 * @return le connection parameter range struct 238 */ 239 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 240 *range = hci_stack->le_connection_parameter_range; 241 } 242 243 /** 244 * set le connection parameter range 245 * 246 */ 247 248 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 249 hci_stack->le_connection_parameter_range = *range; 250 } 251 252 /** 253 * @brief Test if connection parameters are inside in existing rage 254 * @param conn_interval_min (unit: 1.25ms) 255 * @param conn_interval_max (unit: 1.25ms) 256 * @param conn_latency 257 * @param supervision_timeout (unit: 10ms) 258 * @returns 1 if included 259 */ 260 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){ 261 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 262 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 263 264 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 265 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 266 267 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 268 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 269 270 return 1; 271 } 272 273 /** 274 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 275 * @note: default: 1 276 * @param max_peripheral_connections 277 */ 278 #ifdef ENABLE_LE_PERIPHERAL 279 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 280 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 281 } 282 #endif 283 284 /** 285 * get hci connections iterator 286 * 287 * @return hci connections iterator 288 */ 289 290 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 291 btstack_linked_list_iterator_init(it, &hci_stack->connections); 292 } 293 294 /** 295 * get connection for a given handle 296 * 297 * @return connection OR NULL, if not found 298 */ 299 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 300 btstack_linked_list_iterator_t it; 301 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 302 while (btstack_linked_list_iterator_has_next(&it)){ 303 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 304 if ( item->con_handle == con_handle ) { 305 return item; 306 } 307 } 308 return NULL; 309 } 310 311 /** 312 * get connection for given address 313 * 314 * @return connection OR NULL, if not found 315 */ 316 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 317 btstack_linked_list_iterator_t it; 318 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 319 while (btstack_linked_list_iterator_has_next(&it)){ 320 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 321 if (connection->address_type != addr_type) continue; 322 if (memcmp(addr, connection->address, 6) != 0) continue; 323 return connection; 324 } 325 return NULL; 326 } 327 328 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 329 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 330 } 331 332 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 333 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 334 } 335 336 #ifdef ENABLE_CLASSIC 337 338 #ifdef ENABLE_SCO_OVER_HCI 339 static int hci_number_sco_connections(void){ 340 int connections = 0; 341 btstack_linked_list_iterator_t it; 342 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 343 while (btstack_linked_list_iterator_has_next(&it)){ 344 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 345 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 346 connections++; 347 } 348 return connections; 349 } 350 #endif 351 352 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 353 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 354 #ifdef HAVE_EMBEDDED_TICK 355 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 356 // connections might be timed out 357 hci_emit_l2cap_check_timeout(connection); 358 } 359 #else 360 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 361 // connections might be timed out 362 hci_emit_l2cap_check_timeout(connection); 363 } 364 #endif 365 } 366 367 static void hci_connection_timestamp(hci_connection_t *connection){ 368 #ifdef HAVE_EMBEDDED_TICK 369 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 370 #else 371 connection->timestamp = btstack_run_loop_get_time_ms(); 372 #endif 373 } 374 375 /** 376 * add authentication flags and reset timer 377 * @note: assumes classic connection 378 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 379 */ 380 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 381 bd_addr_t addr; 382 reverse_bd_addr(bd_addr, addr); 383 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 384 if (conn) { 385 connectionSetAuthenticationFlags(conn, flags); 386 hci_connection_timestamp(conn); 387 } 388 } 389 390 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 391 hci_connection_t * conn = hci_connection_for_handle(handle); 392 if (!conn) return 0; 393 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 394 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 395 return 0; 396 } 397 398 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 399 if (!hci_stack->link_key_db) return; 400 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 401 hci_stack->link_key_db->delete_link_key(addr); 402 } 403 404 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 405 if (!hci_stack->link_key_db) return; 406 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 407 hci_stack->link_key_db->put_link_key(addr, link_key, type); 408 } 409 410 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 411 if (!hci_stack->link_key_db) return false; 412 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 413 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 414 return result; 415 } 416 417 void gap_delete_all_link_keys(void){ 418 bd_addr_t addr; 419 link_key_t link_key; 420 link_key_type_t type; 421 btstack_link_key_iterator_t it; 422 int ok = gap_link_key_iterator_init(&it); 423 if (!ok) { 424 log_error("could not initialize iterator"); 425 return; 426 } 427 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 428 gap_drop_link_key_for_bd_addr(addr); 429 } 430 gap_link_key_iterator_done(&it); 431 } 432 433 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 434 if (!hci_stack->link_key_db) return 0; 435 if (!hci_stack->link_key_db->iterator_init) return 0; 436 return hci_stack->link_key_db->iterator_init(it); 437 } 438 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){ 439 if (!hci_stack->link_key_db) return 0; 440 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 441 } 442 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 443 if (!hci_stack->link_key_db) return; 444 hci_stack->link_key_db->iterator_done(it); 445 } 446 #endif 447 448 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 449 switch (address_type){ 450 case BD_ADDR_TYPE_LE_PUBLIC: 451 case BD_ADDR_TYPE_LE_RANDOM: 452 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 453 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 454 return true; 455 default: 456 return false; 457 } 458 } 459 460 static int hci_is_le_connection(hci_connection_t * connection){ 461 return hci_is_le_connection_type(connection->address_type); 462 } 463 464 /** 465 * count connections 466 */ 467 static int nr_hci_connections(void){ 468 int count = 0; 469 btstack_linked_item_t *it; 470 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 471 count++; 472 } 473 return count; 474 } 475 476 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 477 478 unsigned int num_packets_sent_classic = 0; 479 unsigned int num_packets_sent_le = 0; 480 481 btstack_linked_item_t *it; 482 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 483 hci_connection_t * connection = (hci_connection_t *) it; 484 if (hci_is_le_connection(connection)){ 485 num_packets_sent_le += connection->num_packets_sent; 486 } 487 if (connection->address_type == BD_ADDR_TYPE_ACL){ 488 num_packets_sent_classic += connection->num_packets_sent; 489 } 490 } 491 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 492 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 493 int free_slots_le = 0; 494 495 if (free_slots_classic < 0){ 496 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); 497 return 0; 498 } 499 500 if (hci_stack->le_acl_packets_total_num){ 501 // if we have LE slots, they are used 502 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 503 if (free_slots_le < 0){ 504 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); 505 return 0; 506 } 507 } else { 508 // otherwise, classic slots are used for LE, too 509 free_slots_classic -= num_packets_sent_le; 510 if (free_slots_classic < 0){ 511 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); 512 return 0; 513 } 514 } 515 516 switch (address_type){ 517 case BD_ADDR_TYPE_UNKNOWN: 518 log_error("hci_number_free_acl_slots: unknown address type"); 519 return 0; 520 521 case BD_ADDR_TYPE_ACL: 522 return free_slots_classic; 523 524 default: 525 if (hci_stack->le_acl_packets_total_num){ 526 return free_slots_le; 527 } 528 return free_slots_classic; 529 } 530 } 531 532 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 533 // get connection type 534 hci_connection_t * connection = hci_connection_for_handle(con_handle); 535 if (!connection){ 536 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 537 return 0; 538 } 539 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 540 } 541 542 #ifdef ENABLE_CLASSIC 543 static int hci_number_free_sco_slots(void){ 544 unsigned int num_sco_packets_sent = 0; 545 btstack_linked_item_t *it; 546 if (hci_stack->synchronous_flow_control_enabled){ 547 // explicit flow control 548 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 549 hci_connection_t * connection = (hci_connection_t *) it; 550 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 551 num_sco_packets_sent += connection->num_packets_sent; 552 } 553 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 554 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 555 return 0; 556 } 557 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 558 } else { 559 // implicit flow control -- TODO 560 int num_ready = 0; 561 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 562 hci_connection_t * connection = (hci_connection_t *) it; 563 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 564 if (connection->sco_tx_ready == 0) continue; 565 num_ready++; 566 } 567 return num_ready; 568 } 569 } 570 #endif 571 572 // only used to send HCI Host Number Completed Packets 573 static int hci_can_send_comand_packet_transport(void){ 574 if (hci_stack->hci_packet_buffer_reserved) return 0; 575 576 // check for async hci transport implementations 577 if (hci_stack->hci_transport->can_send_packet_now){ 578 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 579 return 0; 580 } 581 } 582 return 1; 583 } 584 585 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 586 int hci_can_send_command_packet_now(void){ 587 if (hci_can_send_comand_packet_transport() == 0) return 0; 588 return hci_stack->num_cmd_packets > 0u; 589 } 590 591 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 592 // check for async hci transport implementations 593 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 594 return hci_stack->hci_transport->can_send_packet_now(packet_type); 595 } 596 597 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 598 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 599 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 600 } 601 602 int hci_can_send_acl_le_packet_now(void){ 603 if (hci_stack->hci_packet_buffer_reserved) return 0; 604 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 605 } 606 607 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 608 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 609 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 610 } 611 612 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 613 if (hci_stack->hci_packet_buffer_reserved) return 0; 614 return hci_can_send_prepared_acl_packet_now(con_handle); 615 } 616 617 #ifdef ENABLE_CLASSIC 618 int hci_can_send_acl_classic_packet_now(void){ 619 if (hci_stack->hci_packet_buffer_reserved) return 0; 620 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 621 } 622 623 int hci_can_send_prepared_sco_packet_now(void){ 624 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 625 if (hci_have_usb_transport()){ 626 return hci_stack->sco_can_send_now; 627 } else { 628 return hci_number_free_sco_slots() > 0; 629 } 630 } 631 632 int hci_can_send_sco_packet_now(void){ 633 if (hci_stack->hci_packet_buffer_reserved) return 0; 634 return hci_can_send_prepared_sco_packet_now(); 635 } 636 637 void hci_request_sco_can_send_now_event(void){ 638 hci_stack->sco_waiting_for_can_send_now = 1; 639 hci_notify_if_sco_can_send_now(); 640 } 641 #endif 642 643 // used for internal checks in l2cap.c 644 int hci_is_packet_buffer_reserved(void){ 645 return hci_stack->hci_packet_buffer_reserved; 646 } 647 648 // reserves outgoing packet buffer. @returns 1 if successful 649 int hci_reserve_packet_buffer(void){ 650 if (hci_stack->hci_packet_buffer_reserved) { 651 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 652 return 0; 653 } 654 hci_stack->hci_packet_buffer_reserved = 1; 655 return 1; 656 } 657 658 void hci_release_packet_buffer(void){ 659 hci_stack->hci_packet_buffer_reserved = 0; 660 } 661 662 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 663 static int hci_transport_synchronous(void){ 664 return hci_stack->hci_transport->can_send_packet_now == NULL; 665 } 666 667 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 668 669 // 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); 670 671 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 672 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 673 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 674 max_acl_data_packet_length = hci_stack->le_data_packets_length; 675 } 676 677 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 678 if (hci_is_le_connection(connection)){ 679 max_acl_data_packet_length = connection->le_max_tx_octets; 680 } 681 #endif 682 683 log_debug("hci_send_acl_packet_fragments entered"); 684 685 int err; 686 // multiple packets could be send on a synchronous HCI transport 687 while (true){ 688 689 log_debug("hci_send_acl_packet_fragments loop entered"); 690 691 // get current data 692 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 693 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 694 bool more_fragments = false; 695 696 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 697 if (current_acl_data_packet_length > max_acl_data_packet_length){ 698 more_fragments = true; 699 current_acl_data_packet_length = max_acl_data_packet_length; 700 } 701 702 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 703 if (acl_header_pos > 0u){ 704 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 705 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 706 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 707 } 708 709 // update header len 710 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 711 712 // count packet 713 connection->num_packets_sent++; 714 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 715 716 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 717 if (more_fragments){ 718 // update start of next fragment to send 719 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 720 } else { 721 // done 722 hci_stack->acl_fragmentation_pos = 0; 723 hci_stack->acl_fragmentation_total_size = 0; 724 } 725 726 // send packet 727 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 728 const int size = current_acl_data_packet_length + 4; 729 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 730 hci_stack->acl_fragmentation_tx_active = 1; 731 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 732 733 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 734 735 // done yet? 736 if (!more_fragments) break; 737 738 // can send more? 739 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 740 } 741 742 log_debug("hci_send_acl_packet_fragments loop over"); 743 744 // release buffer now for synchronous transport 745 if (hci_transport_synchronous()){ 746 hci_stack->acl_fragmentation_tx_active = 0; 747 hci_release_packet_buffer(); 748 hci_emit_transport_packet_sent(); 749 } 750 751 return err; 752 } 753 754 // pre: caller has reserved the packet buffer 755 int hci_send_acl_packet_buffer(int size){ 756 757 // log_info("hci_send_acl_packet_buffer size %u", size); 758 759 if (!hci_stack->hci_packet_buffer_reserved) { 760 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 761 return 0; 762 } 763 764 uint8_t * packet = hci_stack->hci_packet_buffer; 765 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 766 767 // check for free places on Bluetooth module 768 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 769 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 770 hci_release_packet_buffer(); 771 hci_emit_transport_packet_sent(); 772 return BTSTACK_ACL_BUFFERS_FULL; 773 } 774 775 hci_connection_t *connection = hci_connection_for_handle( con_handle); 776 if (!connection) { 777 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 778 hci_release_packet_buffer(); 779 hci_emit_transport_packet_sent(); 780 return 0; 781 } 782 783 #ifdef ENABLE_CLASSIC 784 hci_connection_timestamp(connection); 785 #endif 786 787 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 788 789 // setup data 790 hci_stack->acl_fragmentation_total_size = size; 791 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 792 793 return hci_send_acl_packet_fragments(connection); 794 } 795 796 #ifdef ENABLE_CLASSIC 797 // pre: caller has reserved the packet buffer 798 int hci_send_sco_packet_buffer(int size){ 799 800 // log_info("hci_send_acl_packet_buffer size %u", size); 801 802 if (!hci_stack->hci_packet_buffer_reserved) { 803 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 804 return 0; 805 } 806 807 uint8_t * packet = hci_stack->hci_packet_buffer; 808 809 // skip checks in loopback mode 810 if (!hci_stack->loopback_mode){ 811 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 812 813 // check for free places on Bluetooth module 814 if (!hci_can_send_prepared_sco_packet_now()) { 815 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 816 hci_release_packet_buffer(); 817 hci_emit_transport_packet_sent(); 818 return BTSTACK_ACL_BUFFERS_FULL; 819 } 820 821 // track send packet in connection struct 822 hci_connection_t *connection = hci_connection_for_handle( con_handle); 823 if (!connection) { 824 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 825 hci_release_packet_buffer(); 826 hci_emit_transport_packet_sent(); 827 return 0; 828 } 829 830 if (hci_have_usb_transport()){ 831 // token used 832 hci_stack->sco_can_send_now = 0; 833 } else { 834 if (hci_stack->synchronous_flow_control_enabled){ 835 connection->num_packets_sent++; 836 } else { 837 connection->sco_tx_ready--; 838 } 839 } 840 } 841 842 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 843 844 #ifdef HAVE_SCO_TRANSPORT 845 hci_stack->sco_transport->send_packet(packet, size); 846 hci_release_packet_buffer(); 847 hci_emit_transport_packet_sent(); 848 849 return 0; 850 #else 851 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 852 if (hci_transport_synchronous()){ 853 hci_release_packet_buffer(); 854 hci_emit_transport_packet_sent(); 855 } 856 857 return err; 858 #endif 859 } 860 #endif 861 862 static void acl_handler(uint8_t *packet, uint16_t size){ 863 864 // get info 865 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 866 hci_connection_t *conn = hci_connection_for_handle(con_handle); 867 uint8_t acl_flags = READ_ACL_FLAGS(packet); 868 uint16_t acl_length = READ_ACL_LENGTH(packet); 869 870 // ignore non-registered handle 871 if (!conn){ 872 log_error("acl_handler called with non-registered handle %u!" , con_handle); 873 return; 874 } 875 876 // assert packet is complete 877 if ((acl_length + 4u) != size){ 878 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 879 return; 880 } 881 882 #ifdef ENABLE_CLASSIC 883 // update idle timestamp 884 hci_connection_timestamp(conn); 885 #endif 886 887 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 888 hci_stack->host_completed_packets = 1; 889 conn->num_packets_completed++; 890 #endif 891 892 // handle different packet types 893 switch (acl_flags & 0x03u) { 894 895 case 0x01: // continuation fragment 896 897 // sanity checks 898 if (conn->acl_recombination_pos == 0u) { 899 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 900 return; 901 } 902 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 903 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 904 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 905 conn->acl_recombination_pos = 0; 906 return; 907 } 908 909 // append fragment payload (header already stored) 910 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 911 &packet[4], acl_length); 912 conn->acl_recombination_pos += acl_length; 913 914 // forward complete L2CAP packet if complete. 915 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 916 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 917 // reset recombination buffer 918 conn->acl_recombination_length = 0; 919 conn->acl_recombination_pos = 0; 920 } 921 break; 922 923 case 0x02: { // first fragment 924 925 // sanity check 926 if (conn->acl_recombination_pos) { 927 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 928 conn->acl_recombination_pos = 0; 929 } 930 931 // peek into L2CAP packet! 932 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 933 934 // compare fragment size to L2CAP packet size 935 if (acl_length >= (l2cap_length + 4u)){ 936 // forward fragment as L2CAP packet 937 hci_emit_acl_packet(packet, acl_length + 4u); 938 } else { 939 940 if (acl_length > HCI_ACL_BUFFER_SIZE){ 941 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 942 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 943 return; 944 } 945 946 // store first fragment and tweak acl length for complete package 947 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 948 packet, acl_length + 4u); 949 conn->acl_recombination_pos = acl_length + 4u; 950 conn->acl_recombination_length = l2cap_length; 951 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 952 } 953 break; 954 955 } 956 default: 957 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 958 return; 959 } 960 961 // execute main loop 962 hci_run(); 963 } 964 965 static void hci_shutdown_connection(hci_connection_t *conn){ 966 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 967 968 #ifdef ENABLE_CLASSIC 969 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 970 bd_addr_type_t addr_type = conn->address_type; 971 #endif 972 #ifdef HAVE_SCO_TRANSPORT 973 hci_con_handle_t con_handle = conn->con_handle; 974 #endif 975 #endif 976 977 btstack_run_loop_remove_timer(&conn->timeout); 978 979 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 980 btstack_memory_hci_connection_free( conn ); 981 982 // now it's gone 983 hci_emit_nr_connections_changed(); 984 985 #ifdef ENABLE_CLASSIC 986 #ifdef ENABLE_SCO_OVER_HCI 987 // update SCO 988 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 989 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 990 } 991 #endif 992 #ifdef HAVE_SCO_TRANSPORT 993 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 994 hci_stack->sco_transport->close(con_handle); 995 } 996 #endif 997 #endif 998 } 999 1000 #ifdef ENABLE_CLASSIC 1001 1002 static const uint16_t packet_type_sizes[] = { 1003 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1004 HCI_ACL_DH1_SIZE, 0, 0, 0, 1005 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1006 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1007 }; 1008 static const uint8_t packet_type_feature_requirement_bit[] = { 1009 0, // 3 slot packets 1010 1, // 5 slot packets 1011 25, // EDR 2 mpbs 1012 26, // EDR 3 mbps 1013 39, // 3 slot EDR packts 1014 40, // 5 slot EDR packet 1015 }; 1016 static const uint16_t packet_type_feature_packet_mask[] = { 1017 0x0f00, // 3 slot packets 1018 0xf000, // 5 slot packets 1019 0x1102, // EDR 2 mpbs 1020 0x2204, // EDR 3 mbps 1021 0x0300, // 3 slot EDR packts 1022 0x3000, // 5 slot EDR packet 1023 }; 1024 1025 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1026 // enable packet types based on size 1027 uint16_t packet_types = 0; 1028 unsigned int i; 1029 for (i=0;i<16;i++){ 1030 if (packet_type_sizes[i] == 0) continue; 1031 if (packet_type_sizes[i] <= buffer_size){ 1032 packet_types |= 1 << i; 1033 } 1034 } 1035 // disable packet types due to missing local supported features 1036 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1037 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1038 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1039 if (feature_set) continue; 1040 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1041 packet_types &= ~packet_type_feature_packet_mask[i]; 1042 } 1043 // flip bits for "may not be used" 1044 packet_types ^= 0x3306; 1045 return packet_types; 1046 } 1047 1048 uint16_t hci_usable_acl_packet_types(void){ 1049 return hci_stack->packet_types; 1050 } 1051 #endif 1052 1053 uint8_t* hci_get_outgoing_packet_buffer(void){ 1054 // hci packet buffer is >= acl data packet length 1055 return hci_stack->hci_packet_buffer; 1056 } 1057 1058 uint16_t hci_max_acl_data_packet_length(void){ 1059 return hci_stack->acl_data_packet_length; 1060 } 1061 1062 #ifdef ENABLE_CLASSIC 1063 int hci_extended_sco_link_supported(void){ 1064 // No. 31, byte 3, bit 7 1065 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1066 } 1067 #endif 1068 1069 int hci_non_flushable_packet_boundary_flag_supported(void){ 1070 // No. 54, byte 6, bit 6 1071 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1072 } 1073 1074 static int gap_ssp_supported(void){ 1075 // No. 51, byte 6, bit 3 1076 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1077 } 1078 1079 static int hci_classic_supported(void){ 1080 #ifdef ENABLE_CLASSIC 1081 // No. 37, byte 4, bit 5, = No BR/EDR Support 1082 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1083 #else 1084 return 0; 1085 #endif 1086 } 1087 1088 static int hci_le_supported(void){ 1089 #ifdef ENABLE_BLE 1090 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1091 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1092 #else 1093 return 0; 1094 #endif 1095 } 1096 1097 #ifdef ENABLE_BLE 1098 1099 /** 1100 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1101 */ 1102 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1103 *addr_type = hci_stack->le_own_addr_type; 1104 if (hci_stack->le_own_addr_type){ 1105 (void)memcpy(addr, hci_stack->le_random_address, 6); 1106 } else { 1107 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1108 } 1109 } 1110 1111 #ifdef ENABLE_LE_CENTRAL 1112 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1113 1114 int offset = 3; 1115 int num_reports = packet[offset]; 1116 offset += 1; 1117 1118 int i; 1119 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1120 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1121 for (i=0; (i<num_reports) && (offset < size);i++){ 1122 // sanity checks on data_length: 1123 uint8_t data_length = packet[offset + 8]; 1124 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1125 if ((offset + 9u + data_length + 1u) > size) return; 1126 // setup event 1127 uint8_t event_size = 10u + data_length; 1128 int pos = 0; 1129 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1130 event[pos++] = event_size; 1131 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1132 offset += 8; 1133 pos += 8; 1134 event[pos++] = packet[offset + 1 + data_length]; // rssi 1135 event[pos++] = data_length; 1136 offset++; 1137 (void)memcpy(&event[pos], &packet[offset], data_length); 1138 pos += data_length; 1139 offset += data_length + 1u; // rssi 1140 hci_emit_event(event, pos, 1); 1141 } 1142 } 1143 #endif 1144 #endif 1145 1146 #ifdef ENABLE_BLE 1147 #ifdef ENABLE_LE_PERIPHERAL 1148 static void hci_update_advertisements_enabled_for_current_roles(void){ 1149 if (hci_stack->le_advertisements_enabled){ 1150 // get number of active le slave connections 1151 int num_slave_connections = 0; 1152 btstack_linked_list_iterator_t it; 1153 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1154 while (btstack_linked_list_iterator_has_next(&it)){ 1155 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1156 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1157 if (con->state != OPEN) continue; 1158 if (con->role != HCI_ROLE_SLAVE) continue; 1159 if (!hci_is_le_connection(con)) continue; 1160 num_slave_connections++; 1161 } 1162 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1163 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1164 } else { 1165 hci_stack->le_advertisements_enabled_for_current_roles = false; 1166 } 1167 } 1168 #endif 1169 #endif 1170 1171 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1172 1173 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1174 if (!hci_stack->config) return 0; 1175 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1176 // Limit baud rate for Broadcom chipsets to 3 mbps 1177 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1178 baud_rate = 3000000; 1179 } 1180 return baud_rate; 1181 } 1182 1183 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1184 UNUSED(ds); 1185 1186 switch (hci_stack->substate){ 1187 case HCI_INIT_W4_SEND_RESET: 1188 log_info("Resend HCI Reset"); 1189 hci_stack->substate = HCI_INIT_SEND_RESET; 1190 hci_stack->num_cmd_packets = 1; 1191 hci_run(); 1192 break; 1193 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1194 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1195 if (hci_stack->hci_transport->reset_link){ 1196 hci_stack->hci_transport->reset_link(); 1197 } 1198 1199 /* fall through */ 1200 1201 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1202 log_info("Resend HCI Reset - CSR Warm Boot"); 1203 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1204 hci_stack->num_cmd_packets = 1; 1205 hci_run(); 1206 break; 1207 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1208 if (hci_stack->hci_transport->set_baudrate){ 1209 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1210 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1211 hci_stack->hci_transport->set_baudrate(baud_rate); 1212 } 1213 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1214 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1215 if (hci_stack->hci_transport->reset_link){ 1216 log_info("Link Reset"); 1217 hci_stack->hci_transport->reset_link(); 1218 } 1219 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1220 hci_run(); 1221 } 1222 break; 1223 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1224 // otherwise continue 1225 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1226 hci_send_cmd(&hci_read_local_supported_commands); 1227 break; 1228 default: 1229 break; 1230 } 1231 } 1232 #endif 1233 1234 static void hci_initializing_next_state(void){ 1235 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1236 } 1237 1238 // assumption: hci_can_send_command_packet_now() == true 1239 static void hci_initializing_run(void){ 1240 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1241 switch (hci_stack->substate){ 1242 case HCI_INIT_SEND_RESET: 1243 hci_state_reset(); 1244 1245 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1246 // prepare reset if command complete not received in 100ms 1247 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1248 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1249 btstack_run_loop_add_timer(&hci_stack->timeout); 1250 #endif 1251 // send command 1252 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1253 hci_send_cmd(&hci_reset); 1254 break; 1255 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1256 hci_send_cmd(&hci_read_local_version_information); 1257 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1258 break; 1259 case HCI_INIT_SEND_READ_LOCAL_NAME: 1260 hci_send_cmd(&hci_read_local_name); 1261 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1262 break; 1263 1264 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1265 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1266 hci_state_reset(); 1267 // prepare reset if command complete not received in 100ms 1268 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1269 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1270 btstack_run_loop_add_timer(&hci_stack->timeout); 1271 // send command 1272 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1273 hci_send_cmd(&hci_reset); 1274 break; 1275 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1276 hci_state_reset(); 1277 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1278 hci_send_cmd(&hci_reset); 1279 break; 1280 case HCI_INIT_SEND_BAUD_CHANGE: { 1281 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1282 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1283 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1284 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1285 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1286 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1287 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1288 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1289 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1290 btstack_run_loop_add_timer(&hci_stack->timeout); 1291 } 1292 break; 1293 } 1294 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1295 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1296 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1297 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1298 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1299 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1300 break; 1301 } 1302 case HCI_INIT_CUSTOM_INIT: 1303 // Custom initialization 1304 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1305 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1306 bool send_cmd = false; 1307 switch (hci_stack->chipset_result){ 1308 case BTSTACK_CHIPSET_VALID_COMMAND: 1309 send_cmd = true; 1310 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1311 break; 1312 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1313 send_cmd = true; 1314 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1315 log_info("CSR Warm Boot"); 1316 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1317 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1318 btstack_run_loop_add_timer(&hci_stack->timeout); 1319 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1320 && hci_stack->config 1321 && hci_stack->chipset 1322 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1323 && hci_stack->hci_transport->set_baudrate 1324 && hci_transport_uart_get_main_baud_rate()){ 1325 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1326 } else { 1327 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1328 } 1329 break; 1330 default: 1331 break; 1332 } 1333 1334 if (send_cmd){ 1335 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1336 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1337 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1338 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1339 break; 1340 } 1341 log_info("Init script done"); 1342 1343 // Init script download on Broadcom chipsets causes: 1344 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1345 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1346 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1347 1348 // - baud rate to reset, restore UART baud rate if needed 1349 int need_baud_change = hci_stack->config 1350 && hci_stack->chipset 1351 && hci_stack->chipset->set_baudrate_command 1352 && hci_stack->hci_transport->set_baudrate 1353 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1354 if (need_baud_change) { 1355 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1356 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1357 hci_stack->hci_transport->set_baudrate(baud_rate); 1358 } 1359 1360 uint16_t bcm_delay_ms = 300; 1361 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1362 // -> Work around: wait here. 1363 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1364 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1365 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1366 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1367 btstack_run_loop_add_timer(&hci_stack->timeout); 1368 break; 1369 } 1370 } 1371 // otherwise continue 1372 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1373 hci_send_cmd(&hci_read_local_supported_commands); 1374 break; 1375 case HCI_INIT_SET_BD_ADDR: 1376 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1377 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1378 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1379 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1380 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1381 break; 1382 #endif 1383 1384 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1385 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1386 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1387 hci_send_cmd(&hci_read_local_supported_commands); 1388 break; 1389 case HCI_INIT_READ_BD_ADDR: 1390 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1391 hci_send_cmd(&hci_read_bd_addr); 1392 break; 1393 case HCI_INIT_READ_BUFFER_SIZE: 1394 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1395 hci_send_cmd(&hci_read_buffer_size); 1396 break; 1397 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1398 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1399 hci_send_cmd(&hci_read_local_supported_features); 1400 break; 1401 1402 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1403 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1404 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1405 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1406 break; 1407 case HCI_INIT_HOST_BUFFER_SIZE: 1408 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1409 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1410 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1411 break; 1412 #endif 1413 1414 case HCI_INIT_SET_EVENT_MASK: 1415 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1416 if (hci_le_supported()){ 1417 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1418 } else { 1419 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1420 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1421 } 1422 break; 1423 1424 #ifdef ENABLE_CLASSIC 1425 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1426 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1427 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1428 break; 1429 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1430 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1431 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1432 break; 1433 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1434 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1435 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1436 break; 1437 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1438 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1439 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1440 break; 1441 case HCI_INIT_WRITE_LOCAL_NAME: { 1442 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1443 hci_reserve_packet_buffer(); 1444 uint8_t * packet = hci_stack->hci_packet_buffer; 1445 // construct HCI Command and send 1446 uint16_t opcode = hci_write_local_name.opcode; 1447 hci_stack->last_cmd_opcode = opcode; 1448 packet[0] = opcode & 0xff; 1449 packet[1] = opcode >> 8; 1450 packet[2] = DEVICE_NAME_LEN; 1451 memset(&packet[3], 0, DEVICE_NAME_LEN); 1452 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1453 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1454 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1455 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1456 // expand '00:00:00:00:00:00' in name with bd_addr 1457 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1458 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1459 break; 1460 } 1461 case HCI_INIT_WRITE_EIR_DATA: { 1462 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1463 hci_reserve_packet_buffer(); 1464 uint8_t * packet = hci_stack->hci_packet_buffer; 1465 // construct HCI Command in-place and send 1466 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1467 hci_stack->last_cmd_opcode = opcode; 1468 uint16_t offset = 0; 1469 packet[offset++] = opcode & 0xff; 1470 packet[offset++] = opcode >> 8; 1471 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1472 packet[offset++] = 0; // FEC not required 1473 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1474 if (hci_stack->eir_data){ 1475 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1476 ad_context_t context; 1477 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1478 uint8_t data_type = ad_iterator_get_data_type(&context); 1479 uint8_t size = ad_iterator_get_data_len(&context); 1480 const uint8_t *data = ad_iterator_get_data(&context); 1481 // copy item 1482 packet[offset++] = size + 1; 1483 packet[offset++] = data_type; 1484 memcpy(&packet[offset], data, size); 1485 // update name item 1486 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1487 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1488 } 1489 offset += size; 1490 } 1491 } else { 1492 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1493 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1494 packet[offset++] = bytes_to_copy + 1; 1495 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1496 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1497 // expand '00:00:00:00:00:00' in name with bd_addr 1498 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1499 } 1500 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1501 break; 1502 } 1503 case HCI_INIT_WRITE_INQUIRY_MODE: 1504 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1505 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1506 break; 1507 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1508 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1509 hci_stack->secure_connections_active = true; 1510 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1511 break; 1512 case HCI_INIT_WRITE_SCAN_ENABLE: 1513 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1514 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1515 break; 1516 // only sent if ENABLE_SCO_OVER_HCI is defined 1517 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1518 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1519 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1520 break; 1521 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1522 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1523 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1524 break; 1525 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1526 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1527 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1528 #ifdef ENABLE_SCO_OVER_HCI 1529 log_info("BCM: Route SCO data via HCI transport"); 1530 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1531 #endif 1532 #ifdef ENABLE_SCO_OVER_PCM 1533 log_info("BCM: Route SCO data via PCM interface"); 1534 #ifdef ENABLE_BCM_PCM_WBS 1535 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1536 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1537 #else 1538 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1539 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1540 #endif 1541 #endif 1542 break; 1543 #ifdef ENABLE_SCO_OVER_PCM 1544 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1545 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1546 log_info("BCM: Config PCM interface for I2S"); 1547 #ifdef ENABLE_BCM_PCM_WBS 1548 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1549 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1550 #else 1551 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1552 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1553 #endif 1554 break; 1555 #endif 1556 #endif 1557 1558 #ifdef ENABLE_BLE 1559 // LE INIT 1560 case HCI_INIT_LE_READ_BUFFER_SIZE: 1561 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1562 hci_send_cmd(&hci_le_read_buffer_size); 1563 break; 1564 case HCI_INIT_LE_SET_EVENT_MASK: 1565 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1566 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1567 break; 1568 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1569 // LE Supported Host = 1, Simultaneous Host = 0 1570 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1571 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1572 break; 1573 #endif 1574 1575 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1576 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1577 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1578 hci_send_cmd(&hci_le_read_maximum_data_length); 1579 break; 1580 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1581 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1582 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1583 break; 1584 #endif 1585 1586 #ifdef ENABLE_LE_CENTRAL 1587 case HCI_INIT_READ_WHITE_LIST_SIZE: 1588 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1589 hci_send_cmd(&hci_le_read_white_list_size); 1590 break; 1591 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1592 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1593 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); 1594 break; 1595 #endif 1596 default: 1597 return; 1598 } 1599 } 1600 1601 static void hci_init_done(void){ 1602 // done. tell the app 1603 log_info("hci_init_done -> HCI_STATE_WORKING"); 1604 hci_stack->state = HCI_STATE_WORKING; 1605 hci_emit_state(); 1606 hci_run(); 1607 } 1608 1609 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1610 bool command_completed = false; 1611 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1612 uint16_t opcode = little_endian_read_16(packet,3); 1613 if (opcode == hci_stack->last_cmd_opcode){ 1614 command_completed = true; 1615 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1616 } else { 1617 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1618 } 1619 } 1620 1621 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1622 uint8_t status = packet[2]; 1623 uint16_t opcode = little_endian_read_16(packet,4); 1624 if (opcode == hci_stack->last_cmd_opcode){ 1625 if (status){ 1626 command_completed = true; 1627 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1628 } else { 1629 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1630 } 1631 } else { 1632 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1633 } 1634 } 1635 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1636 // Vendor == CSR 1637 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1638 // TODO: track actual command 1639 command_completed = true; 1640 } 1641 1642 // Vendor == Toshiba 1643 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1644 // TODO: track actual command 1645 command_completed = true; 1646 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1647 hci_stack->num_cmd_packets = 1; 1648 } 1649 #endif 1650 1651 return command_completed; 1652 } 1653 1654 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1655 1656 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1657 1658 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1659 1660 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1661 1662 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1663 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1664 // 1665 // HCI Reset 1666 // Timeout 100 ms 1667 // HCI Reset 1668 // Command Complete Reset 1669 // HCI Read Local Version Information 1670 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1671 // hang... 1672 // 1673 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1674 if (!command_completed 1675 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1676 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1677 1678 uint16_t opcode = little_endian_read_16(packet,3); 1679 if (opcode == hci_reset.opcode){ 1680 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1681 return; 1682 } 1683 } 1684 1685 // CSR & H5 1686 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1687 if (!command_completed 1688 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1689 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1690 1691 uint16_t opcode = little_endian_read_16(packet,3); 1692 if (opcode == hci_reset.opcode){ 1693 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1694 return; 1695 } 1696 } 1697 1698 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1699 // fix: Correct substate and behave as command below 1700 if (command_completed){ 1701 switch (hci_stack->substate){ 1702 case HCI_INIT_SEND_RESET: 1703 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1704 break; 1705 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1706 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1707 break; 1708 default: 1709 break; 1710 } 1711 } 1712 1713 #endif 1714 1715 if (!command_completed) return; 1716 1717 bool need_baud_change = false; 1718 bool need_addr_change = false; 1719 1720 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1721 need_baud_change = hci_stack->config 1722 && hci_stack->chipset 1723 && hci_stack->chipset->set_baudrate_command 1724 && hci_stack->hci_transport->set_baudrate 1725 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1726 1727 need_addr_change = hci_stack->custom_bd_addr_set 1728 && hci_stack->chipset 1729 && hci_stack->chipset->set_bd_addr_command; 1730 #endif 1731 1732 switch(hci_stack->substate){ 1733 1734 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1735 case HCI_INIT_SEND_RESET: 1736 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1737 // fix: just correct substate and behave as command below 1738 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1739 btstack_run_loop_remove_timer(&hci_stack->timeout); 1740 break; 1741 case HCI_INIT_W4_SEND_RESET: 1742 btstack_run_loop_remove_timer(&hci_stack->timeout); 1743 break; 1744 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1745 log_info("Received local name, need baud change %d", (int) need_baud_change); 1746 if (need_baud_change){ 1747 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1748 return; 1749 } 1750 // skip baud change 1751 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1752 return; 1753 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1754 // for STLC2500D, baud rate change already happened. 1755 // for others, baud rate gets changed now 1756 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1757 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1758 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1759 hci_stack->hci_transport->set_baudrate(baud_rate); 1760 } 1761 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1762 return; 1763 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1764 btstack_run_loop_remove_timer(&hci_stack->timeout); 1765 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1766 return; 1767 case HCI_INIT_W4_CUSTOM_INIT: 1768 // repeat custom init 1769 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1770 return; 1771 #else 1772 case HCI_INIT_W4_SEND_RESET: 1773 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1774 return ; 1775 #endif 1776 1777 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1778 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1779 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1780 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1781 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1782 return; 1783 } 1784 if (need_addr_change){ 1785 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1786 return; 1787 } 1788 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1789 return; 1790 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1791 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1792 if (need_baud_change){ 1793 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1794 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1795 hci_stack->hci_transport->set_baudrate(baud_rate); 1796 } 1797 if (need_addr_change){ 1798 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1799 return; 1800 } 1801 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1802 return; 1803 case HCI_INIT_W4_SET_BD_ADDR: 1804 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1805 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1806 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1807 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1808 return; 1809 } 1810 // skipping st warm boot 1811 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1812 return; 1813 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1814 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1815 return; 1816 #endif 1817 case HCI_INIT_W4_READ_BD_ADDR: 1818 // only read buffer size if supported 1819 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1820 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1821 return; 1822 } 1823 // skipping read buffer size 1824 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1825 return; 1826 case HCI_INIT_W4_SET_EVENT_MASK: 1827 // skip Classic init commands for LE only chipsets 1828 if (!hci_classic_supported()){ 1829 #ifdef ENABLE_BLE 1830 if (hci_le_supported()){ 1831 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1832 return; 1833 } 1834 #endif 1835 log_error("Neither BR/EDR nor LE supported"); 1836 hci_init_done(); 1837 return; 1838 } 1839 if (!gap_ssp_supported()){ 1840 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1841 return; 1842 } 1843 break; 1844 #ifdef ENABLE_BLE 1845 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1846 // skip write le host if not supported (e.g. on LE only EM9301) 1847 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1848 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1849 return; 1850 1851 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1852 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1853 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1854 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1855 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1856 return; 1857 } 1858 // explicit fall through to reduce repetitions 1859 1860 #ifdef ENABLE_LE_CENTRAL 1861 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1862 #else 1863 hci_init_done(); 1864 #endif 1865 return; 1866 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1867 1868 #endif /* ENABLE_BLE */ 1869 1870 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1871 // skip write secure connections host support if not supported or disabled 1872 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1873 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1874 return; 1875 } 1876 break; 1877 1878 #ifdef ENABLE_SCO_OVER_HCI 1879 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1880 // skip write synchronous flow control if not supported 1881 if (hci_stack->local_supported_commands[0] & 0x04) break; 1882 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1883 1884 /* fall through */ 1885 1886 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1887 // skip write default erroneous data reporting if not supported 1888 if (hci_stack->local_supported_commands[0] & 0x08) break; 1889 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1890 1891 /* fall through */ 1892 1893 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1894 // skip bcm set sco pcm config on non-Broadcom chipsets 1895 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1896 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1897 1898 /* fall through */ 1899 1900 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1901 if (!hci_le_supported()){ 1902 // SKIP LE init for Classic only configuration 1903 hci_init_done(); 1904 return; 1905 } 1906 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1907 break; 1908 1909 #else /* !ENABLE_SCO_OVER_HCI */ 1910 1911 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1912 #ifdef ENABLE_SCO_OVER_PCM 1913 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1914 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1915 return; 1916 } 1917 #endif 1918 /* fall through */ 1919 1920 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1921 #ifdef ENABLE_BLE 1922 if (hci_le_supported()){ 1923 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1924 return; 1925 } 1926 #endif 1927 // SKIP LE init for Classic only configuration 1928 hci_init_done(); 1929 return; 1930 #endif /* ENABLE_SCO_OVER_HCI */ 1931 1932 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1933 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1934 // Response to command before init done state -> init done 1935 case (HCI_INIT_DONE-1): 1936 hci_init_done(); 1937 return; 1938 #endif 1939 1940 default: 1941 break; 1942 } 1943 hci_initializing_next_state(); 1944 } 1945 1946 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1947 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1948 bd_addr_t bd_address; 1949 (void)memcpy(&bd_address, conn->address, 6); 1950 1951 #ifdef ENABLE_CLASSIC 1952 // cache needed data 1953 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1954 #endif 1955 1956 // connection failed, remove entry 1957 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1958 btstack_memory_hci_connection_free( conn ); 1959 1960 #ifdef ENABLE_CLASSIC 1961 // notify client if dedicated bonding 1962 if (notify_dedicated_bonding_failed){ 1963 log_info("hci notify_dedicated_bonding_failed"); 1964 hci_emit_dedicated_bonding_result(bd_address, status); 1965 } 1966 1967 // if authentication error, also delete link key 1968 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1969 gap_drop_link_key_for_bd_addr(bd_address); 1970 } 1971 #else 1972 UNUSED(status); 1973 #endif 1974 } 1975 1976 #ifdef ENABLE_CLASSIC 1977 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1978 // SSP Controller 1979 if (features[6] & (1 << 3)){ 1980 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1981 } 1982 // eSCO 1983 if (features[3] & (1<<7)){ 1984 conn->remote_supported_features[0] |= 1; 1985 } 1986 // Extended features 1987 if (features[7] & (1<<7)){ 1988 conn->remote_supported_features[0] |= 2; 1989 } 1990 } 1991 1992 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1993 // SSP Host 1994 if (features[0] & (1 << 0)){ 1995 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1996 } 1997 // SC Host 1998 if (features[0] & (1 << 3)){ 1999 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2000 } 2001 } 2002 2003 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2004 // SC Controller 2005 if (features[1] & (1 << 0)){ 2006 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2007 } 2008 } 2009 2010 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2011 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2012 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2013 if (conn->bonding_flags & BONDING_DEDICATED){ 2014 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2015 } 2016 } 2017 #endif 2018 2019 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2020 // handle BT initialization 2021 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2022 hci_initializing_event_handler(packet, size); 2023 } 2024 2025 // help with BT sleep 2026 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2027 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2028 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2029 hci_initializing_next_state(); 2030 } 2031 } 2032 2033 #ifdef ENABLE_CLASSIC 2034 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2035 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2036 conn->encryption_key_size = encryption_key_size; 2037 2038 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 2039 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2040 return; 2041 } 2042 2043 // Request Authentication if not already done 2044 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2045 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2046 } 2047 #endif 2048 2049 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2050 UNUSED(size); 2051 2052 uint16_t manufacturer; 2053 #ifdef ENABLE_CLASSIC 2054 hci_con_handle_t handle; 2055 hci_connection_t * conn; 2056 uint8_t status; 2057 #endif 2058 // get num cmd packets - limit to 1 to reduce complexity 2059 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2060 2061 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2062 switch (opcode){ 2063 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2064 if (packet[5]) break; 2065 // terminate, name 248 chars 2066 packet[6+248] = 0; 2067 log_info("local name: %s", &packet[6]); 2068 break; 2069 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2070 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2071 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2072 uint16_t acl_len = little_endian_read_16(packet, 6); 2073 uint16_t sco_len = packet[8]; 2074 2075 // determine usable ACL/SCO payload size 2076 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2077 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2078 2079 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2080 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2081 2082 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2083 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2084 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2085 } 2086 break; 2087 case HCI_OPCODE_HCI_READ_RSSI: 2088 if (packet[5] == ERROR_CODE_SUCCESS){ 2089 uint8_t event[5]; 2090 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2091 event[1] = 3; 2092 (void)memcpy(&event[2], &packet[6], 3); 2093 hci_emit_event(event, sizeof(event), 1); 2094 } 2095 break; 2096 #ifdef ENABLE_BLE 2097 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2098 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2099 hci_stack->le_acl_packets_total_num = packet[8]; 2100 // determine usable ACL payload size 2101 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2102 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2103 } 2104 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2105 break; 2106 #endif 2107 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2108 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2109 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2110 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2111 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); 2112 break; 2113 #endif 2114 #ifdef ENABLE_LE_CENTRAL 2115 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2116 hci_stack->le_whitelist_capacity = packet[6]; 2117 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2118 break; 2119 #endif 2120 case HCI_OPCODE_HCI_READ_BD_ADDR: 2121 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2122 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)); 2123 #ifdef ENABLE_CLASSIC 2124 if (hci_stack->link_key_db){ 2125 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2126 } 2127 #endif 2128 break; 2129 #ifdef ENABLE_CLASSIC 2130 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2131 hci_emit_discoverable_enabled(hci_stack->discoverable); 2132 break; 2133 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2134 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2135 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2136 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2137 hci_emit_event(event, sizeof(event), 1); 2138 } 2139 break; 2140 #endif 2141 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2142 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2143 2144 #ifdef ENABLE_CLASSIC 2145 // determine usable ACL packet types based on host buffer size and supported features 2146 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2147 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2148 #endif 2149 // Classic/LE 2150 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2151 break; 2152 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2153 manufacturer = little_endian_read_16(packet, 10); 2154 // map Cypress to Broadcom 2155 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2156 log_info("Treat Cypress as Broadcom"); 2157 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2158 little_endian_store_16(packet, 10, manufacturer); 2159 } 2160 hci_stack->manufacturer = manufacturer; 2161 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2162 break; 2163 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2164 hci_stack->local_supported_commands[0] = 2165 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2166 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2167 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2168 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2169 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2170 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2171 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2172 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2173 hci_stack->local_supported_commands[1] = 2174 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2175 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2176 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2177 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2178 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2179 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2180 break; 2181 #ifdef ENABLE_CLASSIC 2182 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2183 if (packet[5]) return; 2184 hci_stack->synchronous_flow_control_enabled = 1; 2185 break; 2186 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2187 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2188 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2189 conn = hci_connection_for_handle(handle); 2190 if (conn != NULL) { 2191 uint8_t key_size = 0; 2192 if (status == 0){ 2193 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2194 log_info("Handle %04x key Size: %u", handle, key_size); 2195 } else { 2196 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2197 } 2198 hci_handle_read_encryption_key_size_complete(conn, key_size); 2199 } 2200 break; 2201 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2202 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2203 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2204 uint8_t event[67]; 2205 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2206 event[1] = 65; 2207 (void)memset(&event[2], 0, 65); 2208 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2209 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2210 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2211 event[2] = 3; 2212 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2213 } else { 2214 event[2] = 1; 2215 } 2216 } 2217 hci_emit_event(event, sizeof(event), 0); 2218 break; 2219 } 2220 #endif 2221 #endif 2222 default: 2223 break; 2224 } 2225 } 2226 2227 #ifdef ENABLE_BLE 2228 static void event_handle_le_connection_complete(const uint8_t * packet){ 2229 bd_addr_t addr; 2230 bd_addr_type_t addr_type; 2231 hci_connection_t * conn; 2232 2233 // Connection management 2234 reverse_bd_addr(&packet[8], addr); 2235 addr_type = (bd_addr_type_t)packet[7]; 2236 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2237 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2238 2239 #ifdef ENABLE_LE_CENTRAL 2240 // handle error: error is reported only to the initiator -> outgoing connection 2241 if (packet[3]){ 2242 2243 // handle cancelled outgoing connection 2244 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2245 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2246 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2247 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2248 // whitelist connect 2249 if (hci_is_le_connection_type(addr_type)){ 2250 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2251 } 2252 // get outgoing connection conn struct for direct connect 2253 conn = gap_get_outgoing_connection(); 2254 } 2255 2256 // outgoing le connection establishment is done 2257 if (conn){ 2258 // remove entry 2259 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2260 btstack_memory_hci_connection_free( conn ); 2261 } 2262 return; 2263 } 2264 #endif 2265 2266 // on success, both hosts receive connection complete event 2267 if (packet[6] == HCI_ROLE_MASTER){ 2268 #ifdef ENABLE_LE_CENTRAL 2269 // if we're master on an le connection, it was an outgoing connection and we're done with it 2270 // note: no hci_connection_t object exists yet for connect with whitelist 2271 if (hci_is_le_connection_type(addr_type)){ 2272 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2273 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2274 } 2275 #endif 2276 } else { 2277 #ifdef ENABLE_LE_PERIPHERAL 2278 // if we're slave, it was an incoming connection, advertisements have stopped 2279 hci_stack->le_advertisements_active = false; 2280 #endif 2281 } 2282 2283 // LE connections are auto-accepted, so just create a connection if there isn't one already 2284 if (!conn){ 2285 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2286 } 2287 2288 // no memory, sorry. 2289 if (!conn){ 2290 return; 2291 } 2292 2293 conn->state = OPEN; 2294 conn->role = packet[6]; 2295 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2296 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2297 2298 #ifdef ENABLE_LE_PERIPHERAL 2299 if (packet[6] == HCI_ROLE_SLAVE){ 2300 hci_update_advertisements_enabled_for_current_roles(); 2301 } 2302 #endif 2303 2304 // init unenhanced att bearer mtu 2305 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2306 conn->att_connection.mtu_exchanged = false; 2307 2308 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2309 2310 // restart timer 2311 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2312 // btstack_run_loop_add_timer(&conn->timeout); 2313 2314 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2315 2316 hci_emit_nr_connections_changed(); 2317 } 2318 #endif 2319 2320 static void event_handler(uint8_t *packet, uint16_t size){ 2321 2322 uint16_t event_length = packet[1]; 2323 2324 // assert packet is complete 2325 if (size != (event_length + 2u)){ 2326 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2327 return; 2328 } 2329 2330 bd_addr_type_t addr_type; 2331 hci_con_handle_t handle; 2332 hci_connection_t * conn; 2333 int i; 2334 int create_connection_cmd; 2335 2336 #ifdef ENABLE_CLASSIC 2337 hci_link_type_t link_type; 2338 bd_addr_t addr; 2339 #endif 2340 2341 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2342 2343 switch (hci_event_packet_get_type(packet)) { 2344 2345 case HCI_EVENT_COMMAND_COMPLETE: 2346 handle_command_complete_event(packet, size); 2347 break; 2348 2349 case HCI_EVENT_COMMAND_STATUS: 2350 // get num cmd packets - limit to 1 to reduce complexity 2351 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2352 2353 // check command status to detected failed outgoing connections 2354 create_connection_cmd = 0; 2355 #ifdef ENABLE_CLASSIC 2356 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2357 create_connection_cmd = 1; 2358 } 2359 #endif 2360 #ifdef ENABLE_LE_CENTRAL 2361 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2362 create_connection_cmd = 1; 2363 } 2364 #endif 2365 if (create_connection_cmd) { 2366 uint8_t status = hci_event_command_status_get_status(packet); 2367 addr_type = hci_stack->outgoing_addr_type; 2368 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2369 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); 2370 2371 // reset outgoing address info 2372 memset(hci_stack->outgoing_addr, 0, 6); 2373 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2374 2375 // on error 2376 if (status != ERROR_CODE_SUCCESS){ 2377 #ifdef ENABLE_LE_CENTRAL 2378 if (hci_is_le_connection_type(addr_type)){ 2379 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2380 } 2381 #endif 2382 // error => outgoing connection failed 2383 if (conn != NULL){ 2384 hci_handle_connection_failed(conn, status); 2385 } 2386 } 2387 } 2388 break; 2389 2390 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2391 if (size < 3) return; 2392 uint16_t num_handles = packet[2]; 2393 if (size != (3u + num_handles * 4u)) return; 2394 uint16_t offset = 3; 2395 for (i=0; i<num_handles;i++){ 2396 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2397 offset += 2u; 2398 uint16_t num_packets = little_endian_read_16(packet, offset); 2399 offset += 2u; 2400 2401 conn = hci_connection_for_handle(handle); 2402 if (!conn){ 2403 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2404 continue; 2405 } 2406 2407 if (conn->num_packets_sent >= num_packets){ 2408 conn->num_packets_sent -= num_packets; 2409 } else { 2410 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2411 conn->num_packets_sent = 0; 2412 } 2413 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2414 2415 #ifdef ENABLE_CLASSIC 2416 // For SCO, we do the can_send_now_check here 2417 hci_notify_if_sco_can_send_now(); 2418 #endif 2419 } 2420 break; 2421 } 2422 2423 #ifdef ENABLE_CLASSIC 2424 case HCI_EVENT_INQUIRY_COMPLETE: 2425 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2426 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2427 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2428 hci_emit_event(event, sizeof(event), 1); 2429 } 2430 break; 2431 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2432 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2433 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2434 } 2435 break; 2436 case HCI_EVENT_CONNECTION_REQUEST: 2437 reverse_bd_addr(&packet[2], addr); 2438 link_type = (hci_link_type_t) packet[11]; 2439 if (hci_stack->gap_classic_accept_callback != NULL){ 2440 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2441 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2442 bd_addr_copy(hci_stack->decline_addr, addr); 2443 break; 2444 } 2445 } 2446 2447 // TODO: eval COD 8-10 2448 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2449 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2450 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2451 if (!conn) { 2452 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2453 } 2454 if (!conn) { 2455 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2456 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2457 bd_addr_copy(hci_stack->decline_addr, addr); 2458 break; 2459 } 2460 conn->role = HCI_ROLE_SLAVE; 2461 conn->state = RECEIVED_CONNECTION_REQUEST; 2462 // store info about eSCO 2463 if (link_type == HCI_LINK_TYPE_ESCO){ 2464 conn->remote_supported_features[0] |= 1; 2465 } 2466 hci_run(); 2467 break; 2468 2469 case HCI_EVENT_CONNECTION_COMPLETE: 2470 // Connection management 2471 reverse_bd_addr(&packet[5], addr); 2472 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2473 addr_type = BD_ADDR_TYPE_ACL; 2474 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2475 if (conn) { 2476 if (!packet[2]){ 2477 conn->state = OPEN; 2478 conn->con_handle = little_endian_read_16(packet, 3); 2479 2480 // queue get remote feature 2481 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2482 2483 // queue set supervision timeout if we're master 2484 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2485 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2486 } 2487 2488 // restart timer 2489 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2490 btstack_run_loop_add_timer(&conn->timeout); 2491 2492 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2493 2494 hci_emit_nr_connections_changed(); 2495 } else { 2496 // connection failed 2497 hci_handle_connection_failed(conn, packet[2]); 2498 } 2499 } 2500 break; 2501 2502 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2503 reverse_bd_addr(&packet[5], addr); 2504 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2505 if (packet[2]){ 2506 // connection failed 2507 break; 2508 } 2509 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2510 if (!conn) { 2511 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2512 } 2513 if (!conn) { 2514 break; 2515 } 2516 conn->state = OPEN; 2517 conn->con_handle = little_endian_read_16(packet, 3); 2518 2519 #ifdef ENABLE_SCO_OVER_HCI 2520 // update SCO 2521 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2522 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2523 } 2524 // trigger can send now 2525 if (hci_have_usb_transport()){ 2526 hci_stack->sco_can_send_now = 1; 2527 } 2528 #endif 2529 #ifdef HAVE_SCO_TRANSPORT 2530 // configure sco transport 2531 if (hci_stack->sco_transport != NULL){ 2532 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2533 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2534 } 2535 #endif 2536 break; 2537 2538 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2539 handle = little_endian_read_16(packet, 3); 2540 conn = hci_connection_for_handle(handle); 2541 if (!conn) break; 2542 if (!packet[2]){ 2543 const uint8_t * features = &packet[5]; 2544 hci_handle_remote_features_page_0(conn, features); 2545 2546 // read extended features if possible 2547 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2548 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2549 break; 2550 } 2551 } 2552 hci_handle_remote_features_received(conn); 2553 break; 2554 2555 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2556 handle = little_endian_read_16(packet, 3); 2557 conn = hci_connection_for_handle(handle); 2558 if (!conn) break; 2559 // status = ok, page = 1 2560 if (!packet[2]) { 2561 uint8_t page_number = packet[5]; 2562 uint8_t maximum_page_number = packet[6]; 2563 const uint8_t * features = &packet[7]; 2564 bool done = false; 2565 switch (page_number){ 2566 case 1: 2567 hci_handle_remote_features_page_1(conn, features); 2568 if (maximum_page_number >= 2){ 2569 // get Secure Connections (Controller) from Page 2 if available 2570 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2571 } else { 2572 // otherwise, assume SC (Controller) == SC (Host) 2573 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2574 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2575 } 2576 done = true; 2577 } 2578 break; 2579 case 2: 2580 hci_handle_remote_features_page_2(conn, features); 2581 done = true; 2582 break; 2583 default: 2584 break; 2585 } 2586 if (!done) break; 2587 } 2588 hci_handle_remote_features_received(conn); 2589 break; 2590 2591 case HCI_EVENT_LINK_KEY_REQUEST: 2592 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2593 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2594 // request handled by hci_run() 2595 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2596 break; 2597 2598 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2599 reverse_bd_addr(&packet[2], addr); 2600 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2601 if (!conn) break; 2602 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2603 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2604 // Change Connection Encryption keeps link key type 2605 if (link_key_type != CHANGED_COMBINATION_KEY){ 2606 conn->link_key_type = link_key_type; 2607 } 2608 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2609 // still forward event to allow dismiss of pairing dialog 2610 break; 2611 } 2612 2613 case HCI_EVENT_PIN_CODE_REQUEST: 2614 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2615 // non-bondable mode: pin code negative reply will be sent 2616 if (!hci_stack->bondable){ 2617 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2618 hci_run(); 2619 return; 2620 } 2621 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2622 if (!hci_stack->link_key_db) break; 2623 hci_event_pin_code_request_get_bd_addr(packet, addr); 2624 hci_stack->link_key_db->delete_link_key(addr); 2625 break; 2626 2627 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2628 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2629 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2630 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2631 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2632 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2633 } else { 2634 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2635 } 2636 #endif 2637 break; 2638 2639 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2640 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2641 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2642 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2643 break; 2644 #endif 2645 2646 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2647 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2648 if (!hci_stack->ssp_auto_accept) break; 2649 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2650 break; 2651 2652 case HCI_EVENT_USER_PASSKEY_REQUEST: 2653 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2654 if (!hci_stack->ssp_auto_accept) break; 2655 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2656 break; 2657 2658 case HCI_EVENT_MODE_CHANGE: 2659 handle = hci_event_mode_change_get_handle(packet); 2660 conn = hci_connection_for_handle(handle); 2661 if (!conn) break; 2662 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2663 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2664 break; 2665 #endif 2666 2667 case HCI_EVENT_ENCRYPTION_CHANGE: 2668 handle = hci_event_encryption_change_get_connection_handle(packet); 2669 conn = hci_connection_for_handle(handle); 2670 if (!conn) break; 2671 if (hci_event_encryption_change_get_status(packet) == 0u) { 2672 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2673 if (encryption_enabled){ 2674 if (hci_is_le_connection(conn)){ 2675 // For LE, we accept connection as encrypted 2676 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2677 } 2678 #ifdef ENABLE_CLASSIC 2679 else { 2680 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2681 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2682 bool connected_uses_aes_ccm = encryption_enabled == 2; 2683 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2684 log_info("SC during pairing, but only E0 now -> abort"); 2685 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2686 break; 2687 } 2688 2689 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2690 if (connected_uses_aes_ccm){ 2691 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2692 } 2693 2694 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2695 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2696 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2697 } else { 2698 // if not, pretend everything is perfect 2699 hci_handle_read_encryption_key_size_complete(conn, 16); 2700 } 2701 } 2702 #endif 2703 } else { 2704 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2705 } 2706 } 2707 2708 break; 2709 2710 #ifdef ENABLE_CLASSIC 2711 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2712 handle = hci_event_authentication_complete_get_connection_handle(packet); 2713 conn = hci_connection_for_handle(handle); 2714 if (!conn) break; 2715 2716 // ignore authentication event if we didn't request it 2717 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2718 2719 // dedicated bonding: send result and disconnect 2720 if (conn->bonding_flags & BONDING_DEDICATED){ 2721 conn->bonding_flags &= ~BONDING_DEDICATED; 2722 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2723 conn->bonding_status = packet[2]; 2724 break; 2725 } 2726 2727 // authenticated only if auth status == 0 2728 if (hci_event_authentication_complete_get_status(packet) == 0){ 2729 // authenticated 2730 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2731 2732 // If link key sufficient for requested security and not already encrypted, start encryption 2733 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2734 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2735 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2736 break; 2737 } 2738 } 2739 2740 // emit updated security level 2741 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2742 break; 2743 #endif 2744 2745 // HCI_EVENT_DISCONNECTION_COMPLETE 2746 // has been split, to first notify stack before shutting connection down 2747 // see end of function, too. 2748 case HCI_EVENT_DISCONNECTION_COMPLETE: 2749 if (packet[2]) break; // status != 0 2750 handle = little_endian_read_16(packet, 3); 2751 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2752 if (hci_stack->acl_fragmentation_total_size > 0u) { 2753 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2754 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2755 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2756 hci_stack->acl_fragmentation_total_size = 0; 2757 hci_stack->acl_fragmentation_pos = 0; 2758 if (release_buffer){ 2759 hci_release_packet_buffer(); 2760 } 2761 } 2762 } 2763 2764 conn = hci_connection_for_handle(handle); 2765 if (!conn) break; 2766 // mark connection for shutdown 2767 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2768 2769 // emit dedicatd bonding event 2770 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2771 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2772 } 2773 2774 #ifdef ENABLE_BLE 2775 #ifdef ENABLE_LE_PERIPHERAL 2776 // re-enable advertisements for le connections if active 2777 if (hci_is_le_connection(conn)){ 2778 hci_update_advertisements_enabled_for_current_roles(); 2779 } 2780 #endif 2781 #endif 2782 break; 2783 2784 case HCI_EVENT_HARDWARE_ERROR: 2785 log_error("Hardware Error: 0x%02x", packet[2]); 2786 if (hci_stack->hardware_error_callback){ 2787 (*hci_stack->hardware_error_callback)(packet[2]); 2788 } else { 2789 // if no special requests, just reboot stack 2790 hci_power_control_off(); 2791 hci_power_control_on(); 2792 } 2793 break; 2794 2795 #ifdef ENABLE_CLASSIC 2796 case HCI_EVENT_ROLE_CHANGE: 2797 if (packet[2]) break; // status != 0 2798 reverse_bd_addr(&packet[3], addr); 2799 addr_type = BD_ADDR_TYPE_ACL; 2800 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2801 if (!conn) break; 2802 conn->role = packet[9]; 2803 break; 2804 #endif 2805 2806 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2807 // release packet buffer only for asynchronous transport and if there are not further fragements 2808 if (hci_transport_synchronous()) { 2809 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2810 return; // instead of break: to avoid re-entering hci_run() 2811 } 2812 hci_stack->acl_fragmentation_tx_active = 0; 2813 if (hci_stack->acl_fragmentation_total_size) break; 2814 hci_release_packet_buffer(); 2815 2816 // L2CAP receives this event via the hci_emit_event below 2817 2818 #ifdef ENABLE_CLASSIC 2819 // For SCO, we do the can_send_now_check here 2820 hci_notify_if_sco_can_send_now(); 2821 #endif 2822 break; 2823 2824 #ifdef ENABLE_CLASSIC 2825 case HCI_EVENT_SCO_CAN_SEND_NOW: 2826 // For SCO, we do the can_send_now_check here 2827 hci_stack->sco_can_send_now = 1; 2828 hci_notify_if_sco_can_send_now(); 2829 return; 2830 2831 // explode inquriy results for easier consumption 2832 case HCI_EVENT_INQUIRY_RESULT: 2833 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2834 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2835 gap_inquiry_explode(packet, size); 2836 break; 2837 #endif 2838 2839 #ifdef ENABLE_BLE 2840 case HCI_EVENT_LE_META: 2841 switch (packet[2]){ 2842 #ifdef ENABLE_LE_CENTRAL 2843 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2844 // log_info("advertising report received"); 2845 if (!hci_stack->le_scanning_enabled) break; 2846 le_handle_advertisement_report(packet, size); 2847 break; 2848 #endif 2849 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2850 event_handle_le_connection_complete(packet); 2851 break; 2852 2853 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2854 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2855 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2856 conn = hci_connection_for_handle(handle); 2857 if (!conn) break; 2858 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2859 break; 2860 2861 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2862 // connection 2863 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2864 conn = hci_connection_for_handle(handle); 2865 if (conn) { 2866 // read arguments 2867 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2868 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2869 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2870 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2871 2872 // validate against current connection parameter range 2873 le_connection_parameter_range_t existing_range; 2874 gap_get_connection_parameter_range(&existing_range); 2875 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2876 if (update_parameter){ 2877 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2878 conn->le_conn_interval_min = le_conn_interval_min; 2879 conn->le_conn_interval_max = le_conn_interval_max; 2880 conn->le_conn_latency = le_conn_latency; 2881 conn->le_supervision_timeout = le_supervision_timeout; 2882 } else { 2883 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2884 } 2885 } 2886 break; 2887 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2888 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2889 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2890 conn = hci_connection_for_handle(handle); 2891 if (conn) { 2892 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2893 } 2894 break; 2895 #endif 2896 default: 2897 break; 2898 } 2899 break; 2900 #endif 2901 case HCI_EVENT_VENDOR_SPECIFIC: 2902 // Vendor specific commands often create vendor specific event instead of num completed packets 2903 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2904 switch (hci_stack->manufacturer){ 2905 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2906 hci_stack->num_cmd_packets = 1; 2907 break; 2908 default: 2909 break; 2910 } 2911 break; 2912 default: 2913 break; 2914 } 2915 2916 handle_event_for_current_stack_state(packet, size); 2917 2918 // notify upper stack 2919 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2920 2921 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2922 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2923 handle = little_endian_read_16(packet, 3); 2924 hci_connection_t * aConn = hci_connection_for_handle(handle); 2925 // discard connection if app did not trigger a reconnect in the event handler 2926 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2927 hci_shutdown_connection(aConn); 2928 } 2929 } 2930 2931 // execute main loop 2932 hci_run(); 2933 } 2934 2935 #ifdef ENABLE_CLASSIC 2936 2937 #ifdef ENABLE_SCO_OVER_HCI 2938 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2939 static void sco_schedule_tx(hci_connection_t * conn); 2940 2941 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2942 log_debug("SCO TX Timeout"); 2943 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2944 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2945 if (!conn) return; 2946 2947 // trigger send 2948 conn->sco_tx_ready = 1; 2949 // extra packet if CVSD but SCO buffer is too short 2950 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2951 conn->sco_tx_ready++; 2952 } 2953 hci_notify_if_sco_can_send_now(); 2954 } 2955 2956 2957 #define SCO_TX_AFTER_RX_MS (6) 2958 2959 static void sco_schedule_tx(hci_connection_t * conn){ 2960 2961 uint32_t now = btstack_run_loop_get_time_ms(); 2962 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2963 int time_delta_ms = sco_tx_ms - now; 2964 2965 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2966 2967 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2968 btstack_run_loop_set_timer(timer, time_delta_ms); 2969 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2970 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2971 btstack_run_loop_add_timer(timer); 2972 } 2973 #endif 2974 2975 static void sco_handler(uint8_t * packet, uint16_t size){ 2976 // lookup connection struct 2977 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2978 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2979 if (!conn) return; 2980 2981 #ifdef ENABLE_SCO_OVER_HCI 2982 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2983 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2984 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2985 packet[2] = 0x3c; 2986 memmove(&packet[3], &packet[23], 63); 2987 size = 63; 2988 } 2989 } 2990 2991 if (hci_have_usb_transport()){ 2992 // Nothing to do 2993 } else { 2994 // 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); 2995 if (hci_stack->synchronous_flow_control_enabled == 0){ 2996 uint32_t now = btstack_run_loop_get_time_ms(); 2997 2998 if (!conn->sco_rx_valid){ 2999 // ignore first 10 packets 3000 conn->sco_rx_count++; 3001 // log_debug("sco rx count %u", conn->sco_rx_count); 3002 if (conn->sco_rx_count == 10) { 3003 // use first timestamp as is and pretent it just started 3004 conn->sco_rx_ms = now; 3005 conn->sco_rx_valid = 1; 3006 conn->sco_rx_count = 0; 3007 sco_schedule_tx(conn); 3008 } 3009 } else { 3010 // track expected arrival timme 3011 conn->sco_rx_count++; 3012 conn->sco_rx_ms += 7; 3013 int delta = (int32_t) (now - conn->sco_rx_ms); 3014 if (delta > 0){ 3015 conn->sco_rx_ms++; 3016 } 3017 // log_debug("sco rx %u", conn->sco_rx_ms); 3018 sco_schedule_tx(conn); 3019 } 3020 } 3021 } 3022 #endif 3023 3024 // deliver to app 3025 if (hci_stack->sco_packet_handler) { 3026 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3027 } 3028 3029 #ifdef HAVE_SCO_TRANSPORT 3030 // We can send one packet for each received packet 3031 conn->sco_tx_ready++; 3032 hci_notify_if_sco_can_send_now(); 3033 #endif 3034 3035 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3036 conn->num_packets_completed++; 3037 hci_stack->host_completed_packets = 1; 3038 hci_run(); 3039 #endif 3040 } 3041 #endif 3042 3043 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3044 hci_dump_packet(packet_type, 1, packet, size); 3045 switch (packet_type) { 3046 case HCI_EVENT_PACKET: 3047 event_handler(packet, size); 3048 break; 3049 case HCI_ACL_DATA_PACKET: 3050 acl_handler(packet, size); 3051 break; 3052 #ifdef ENABLE_CLASSIC 3053 case HCI_SCO_DATA_PACKET: 3054 sco_handler(packet, size); 3055 break; 3056 #endif 3057 default: 3058 break; 3059 } 3060 } 3061 3062 /** 3063 * @brief Add event packet handler. 3064 */ 3065 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3066 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3067 } 3068 3069 3070 /** Register HCI packet handlers */ 3071 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3072 hci_stack->acl_packet_handler = handler; 3073 } 3074 3075 #ifdef ENABLE_CLASSIC 3076 /** 3077 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3078 */ 3079 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3080 hci_stack->sco_packet_handler = handler; 3081 } 3082 #endif 3083 3084 static void hci_state_reset(void){ 3085 // no connections yet 3086 hci_stack->connections = NULL; 3087 3088 // keep discoverable/connectable as this has been requested by the client(s) 3089 // hci_stack->discoverable = 0; 3090 // hci_stack->connectable = 0; 3091 // hci_stack->bondable = 1; 3092 // hci_stack->own_addr_type = 0; 3093 3094 // buffer is free 3095 hci_stack->hci_packet_buffer_reserved = 0; 3096 3097 // no pending cmds 3098 hci_stack->decline_reason = 0; 3099 hci_stack->new_scan_enable_value = 0xff; 3100 3101 hci_stack->secure_connections_active = false; 3102 3103 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3104 hci_stack->classic_read_local_oob_data = true; 3105 #endif 3106 3107 // LE 3108 #ifdef ENABLE_BLE 3109 memset(hci_stack->le_random_address, 0, 6); 3110 hci_stack->le_random_address_set = 0; 3111 #endif 3112 #ifdef ENABLE_LE_CENTRAL 3113 hci_stack->le_scanning_active = 0; 3114 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3115 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3116 hci_stack->le_whitelist_capacity = 0; 3117 #endif 3118 } 3119 3120 #ifdef ENABLE_CLASSIC 3121 /** 3122 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3123 */ 3124 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3125 // store and open remote device db 3126 hci_stack->link_key_db = link_key_db; 3127 if (hci_stack->link_key_db) { 3128 hci_stack->link_key_db->open(); 3129 } 3130 } 3131 #endif 3132 3133 void hci_init(const hci_transport_t *transport, const void *config){ 3134 3135 #ifdef HAVE_MALLOC 3136 if (!hci_stack) { 3137 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3138 } 3139 #else 3140 hci_stack = &hci_stack_static; 3141 #endif 3142 memset(hci_stack, 0, sizeof(hci_stack_t)); 3143 3144 // reference to use transport layer implementation 3145 hci_stack->hci_transport = transport; 3146 3147 // reference to used config 3148 hci_stack->config = config; 3149 3150 // setup pointer for outgoing packet buffer 3151 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3152 3153 // max acl payload size defined in config.h 3154 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3155 3156 // register packet handlers with transport 3157 transport->register_packet_handler(&packet_handler); 3158 3159 hci_stack->state = HCI_STATE_OFF; 3160 3161 // class of device 3162 hci_stack->class_of_device = 0x007a020c; // Smartphone 3163 3164 // bondable by default 3165 hci_stack->bondable = 1; 3166 3167 #ifdef ENABLE_CLASSIC 3168 // classic name 3169 hci_stack->local_name = default_classic_name; 3170 3171 // Master slave policy 3172 hci_stack->master_slave_policy = 1; 3173 3174 // Allow Role Switch 3175 hci_stack->allow_role_switch = 1; 3176 3177 // Default / minimum security level = 2 3178 hci_stack->gap_security_level = LEVEL_2; 3179 3180 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3181 hci_stack->gap_required_encyrption_key_size = 7; 3182 #endif 3183 3184 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3185 hci_stack->ssp_enable = 1; 3186 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3187 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3188 hci_stack->ssp_auto_accept = 1; 3189 3190 // Secure Connections: enable (requires support from Controller) 3191 hci_stack->secure_connections_enable = true; 3192 3193 // voice setting - signed 16 bit pcm data with CVSD over the air 3194 hci_stack->sco_voice_setting = 0x60; 3195 3196 #ifdef ENABLE_LE_CENTRAL 3197 // connection parameter to use for outgoing connections 3198 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3199 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3200 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3201 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3202 hci_stack->le_connection_latency = 4; // 4 3203 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3204 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3205 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3206 3207 // default LE Scanning 3208 hci_stack->le_scan_type = 0x1; // active 3209 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3210 hci_stack->le_scan_window = 0x30; // 30 ms 3211 #endif 3212 3213 #ifdef ENABLE_LE_PERIPHERAL 3214 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3215 #endif 3216 3217 // connection parameter range used to answer connection parameter update requests in l2cap 3218 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3219 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3220 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3221 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3222 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3223 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3224 3225 hci_state_reset(); 3226 } 3227 3228 void hci_deinit(void){ 3229 #ifdef HAVE_MALLOC 3230 if (hci_stack) { 3231 free(hci_stack); 3232 } 3233 #endif 3234 hci_stack = NULL; 3235 3236 #ifdef ENABLE_CLASSIC 3237 disable_l2cap_timeouts = 0; 3238 #endif 3239 } 3240 3241 /** 3242 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3243 */ 3244 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3245 hci_stack->chipset = chipset_driver; 3246 3247 // reset chipset driver - init is also called on power_up 3248 if (hci_stack->chipset && hci_stack->chipset->init){ 3249 hci_stack->chipset->init(hci_stack->config); 3250 } 3251 } 3252 3253 /** 3254 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3255 */ 3256 void hci_set_control(const btstack_control_t *hardware_control){ 3257 // references to used control implementation 3258 hci_stack->control = hardware_control; 3259 // init with transport config 3260 hardware_control->init(hci_stack->config); 3261 } 3262 3263 void hci_close(void){ 3264 // close remote device db 3265 if (hci_stack->link_key_db) { 3266 hci_stack->link_key_db->close(); 3267 } 3268 3269 btstack_linked_list_iterator_t lit; 3270 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3271 while (btstack_linked_list_iterator_has_next(&lit)){ 3272 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3273 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3274 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3275 hci_shutdown_connection(connection); 3276 } 3277 3278 hci_power_control(HCI_POWER_OFF); 3279 3280 #ifdef HAVE_MALLOC 3281 free(hci_stack); 3282 #endif 3283 hci_stack = NULL; 3284 } 3285 3286 #ifdef HAVE_SCO_TRANSPORT 3287 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3288 hci_stack->sco_transport = sco_transport; 3289 sco_transport->register_packet_handler(&packet_handler); 3290 } 3291 #endif 3292 3293 #ifdef ENABLE_CLASSIC 3294 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3295 // validate ranage and set 3296 if (encryption_key_size < 7) return; 3297 if (encryption_key_size > 16) return; 3298 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3299 } 3300 3301 void gap_set_security_level(gap_security_level_t security_level){ 3302 hci_stack->gap_security_level = security_level; 3303 } 3304 3305 gap_security_level_t gap_get_security_level(void){ 3306 return hci_stack->gap_security_level; 3307 } 3308 #endif 3309 3310 #ifdef ENABLE_CLASSIC 3311 void gap_set_class_of_device(uint32_t class_of_device){ 3312 hci_stack->class_of_device = class_of_device; 3313 } 3314 3315 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3316 hci_stack->default_link_policy_settings = default_link_policy_settings; 3317 } 3318 3319 void gap_set_allow_role_switch(bool allow_role_switch){ 3320 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3321 } 3322 3323 uint8_t hci_get_allow_role_switch(void){ 3324 return hci_stack->allow_role_switch; 3325 } 3326 3327 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3328 hci_stack->link_supervision_timeout = link_supervision_timeout; 3329 } 3330 3331 void hci_disable_l2cap_timeout_check(void){ 3332 disable_l2cap_timeouts = 1; 3333 } 3334 #endif 3335 3336 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3337 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3338 void hci_set_bd_addr(bd_addr_t addr){ 3339 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3340 hci_stack->custom_bd_addr_set = 1; 3341 } 3342 #endif 3343 3344 // State-Module-Driver overview 3345 // state module low-level 3346 // HCI_STATE_OFF off close 3347 // HCI_STATE_INITIALIZING, on open 3348 // HCI_STATE_WORKING, on open 3349 // HCI_STATE_HALTING, on open 3350 // HCI_STATE_SLEEPING, off/sleep close 3351 // HCI_STATE_FALLING_ASLEEP on open 3352 3353 static int hci_power_control_on(void){ 3354 3355 // power on 3356 int err = 0; 3357 if (hci_stack->control && hci_stack->control->on){ 3358 err = (*hci_stack->control->on)(); 3359 } 3360 if (err){ 3361 log_error( "POWER_ON failed"); 3362 hci_emit_hci_open_failed(); 3363 return err; 3364 } 3365 3366 // int chipset driver 3367 if (hci_stack->chipset && hci_stack->chipset->init){ 3368 hci_stack->chipset->init(hci_stack->config); 3369 } 3370 3371 // init transport 3372 if (hci_stack->hci_transport->init){ 3373 hci_stack->hci_transport->init(hci_stack->config); 3374 } 3375 3376 // open transport 3377 err = hci_stack->hci_transport->open(); 3378 if (err){ 3379 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3380 if (hci_stack->control && hci_stack->control->off){ 3381 (*hci_stack->control->off)(); 3382 } 3383 hci_emit_hci_open_failed(); 3384 return err; 3385 } 3386 return 0; 3387 } 3388 3389 static void hci_power_control_off(void){ 3390 3391 log_info("hci_power_control_off"); 3392 3393 // close low-level device 3394 hci_stack->hci_transport->close(); 3395 3396 log_info("hci_power_control_off - hci_transport closed"); 3397 3398 // power off 3399 if (hci_stack->control && hci_stack->control->off){ 3400 (*hci_stack->control->off)(); 3401 } 3402 3403 log_info("hci_power_control_off - control closed"); 3404 3405 hci_stack->state = HCI_STATE_OFF; 3406 } 3407 3408 static void hci_power_control_sleep(void){ 3409 3410 log_info("hci_power_control_sleep"); 3411 3412 #if 0 3413 // don't close serial port during sleep 3414 3415 // close low-level device 3416 hci_stack->hci_transport->close(hci_stack->config); 3417 #endif 3418 3419 // sleep mode 3420 if (hci_stack->control && hci_stack->control->sleep){ 3421 (*hci_stack->control->sleep)(); 3422 } 3423 3424 hci_stack->state = HCI_STATE_SLEEPING; 3425 } 3426 3427 static int hci_power_control_wake(void){ 3428 3429 log_info("hci_power_control_wake"); 3430 3431 // wake on 3432 if (hci_stack->control && hci_stack->control->wake){ 3433 (*hci_stack->control->wake)(); 3434 } 3435 3436 #if 0 3437 // open low-level device 3438 int err = hci_stack->hci_transport->open(hci_stack->config); 3439 if (err){ 3440 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3441 if (hci_stack->control && hci_stack->control->off){ 3442 (*hci_stack->control->off)(); 3443 } 3444 hci_emit_hci_open_failed(); 3445 return err; 3446 } 3447 #endif 3448 3449 return 0; 3450 } 3451 3452 static void hci_power_transition_to_initializing(void){ 3453 // set up state machine 3454 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3455 hci_stack->hci_packet_buffer_reserved = 0; 3456 hci_stack->state = HCI_STATE_INITIALIZING; 3457 hci_stack->substate = HCI_INIT_SEND_RESET; 3458 } 3459 3460 // returns error 3461 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3462 int err; 3463 switch (power_mode){ 3464 case HCI_POWER_ON: 3465 err = hci_power_control_on(); 3466 if (err != 0) { 3467 log_error("hci_power_control_on() error %d", err); 3468 return err; 3469 } 3470 hci_power_transition_to_initializing(); 3471 break; 3472 case HCI_POWER_OFF: 3473 // do nothing 3474 break; 3475 case HCI_POWER_SLEEP: 3476 // do nothing (with SLEEP == OFF) 3477 break; 3478 default: 3479 btstack_assert(false); 3480 break; 3481 } 3482 return ERROR_CODE_SUCCESS; 3483 } 3484 3485 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3486 switch (power_mode){ 3487 case HCI_POWER_ON: 3488 // do nothing 3489 break; 3490 case HCI_POWER_OFF: 3491 // no connections yet, just turn it off 3492 hci_power_control_off(); 3493 break; 3494 case HCI_POWER_SLEEP: 3495 // no connections yet, just turn it off 3496 hci_power_control_sleep(); 3497 break; 3498 default: 3499 btstack_assert(false); 3500 break; 3501 } 3502 return ERROR_CODE_SUCCESS; 3503 } 3504 3505 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3506 switch (power_mode){ 3507 case HCI_POWER_ON: 3508 // do nothing 3509 break; 3510 case HCI_POWER_OFF: 3511 // see hci_run 3512 hci_stack->state = HCI_STATE_HALTING; 3513 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3514 break; 3515 case HCI_POWER_SLEEP: 3516 // see hci_run 3517 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3518 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3519 break; 3520 default: 3521 btstack_assert(false); 3522 break; 3523 } 3524 return ERROR_CODE_SUCCESS; 3525 } 3526 3527 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3528 switch (power_mode){ 3529 case HCI_POWER_ON: 3530 hci_power_transition_to_initializing(); 3531 break; 3532 case HCI_POWER_OFF: 3533 // do nothing 3534 break; 3535 case HCI_POWER_SLEEP: 3536 // see hci_run 3537 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3538 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3539 break; 3540 default: 3541 btstack_assert(false); 3542 break; 3543 } 3544 return ERROR_CODE_SUCCESS; 3545 } 3546 3547 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3548 switch (power_mode){ 3549 case HCI_POWER_ON: 3550 3551 #ifdef HAVE_PLATFORM_IPHONE_OS 3552 // nothing to do, if H4 supports power management 3553 if (btstack_control_iphone_power_management_enabled()){ 3554 hci_stack->state = HCI_STATE_INITIALIZING; 3555 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3556 break; 3557 } 3558 #endif 3559 hci_power_transition_to_initializing(); 3560 break; 3561 case HCI_POWER_OFF: 3562 // see hci_run 3563 hci_stack->state = HCI_STATE_HALTING; 3564 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3565 break; 3566 case HCI_POWER_SLEEP: 3567 // do nothing 3568 break; 3569 default: 3570 btstack_assert(false); 3571 break; 3572 } 3573 return ERROR_CODE_SUCCESS; 3574 } 3575 3576 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3577 int err; 3578 switch (power_mode){ 3579 case HCI_POWER_ON: 3580 #ifdef HAVE_PLATFORM_IPHONE_OS 3581 // nothing to do, if H4 supports power management 3582 if (btstack_control_iphone_power_management_enabled()){ 3583 hci_stack->state = HCI_STATE_INITIALIZING; 3584 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3585 hci_update_scan_enable(); 3586 break; 3587 } 3588 #endif 3589 err = hci_power_control_wake(); 3590 if (err) return err; 3591 hci_power_transition_to_initializing(); 3592 break; 3593 case HCI_POWER_OFF: 3594 hci_stack->state = HCI_STATE_HALTING; 3595 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3596 break; 3597 case HCI_POWER_SLEEP: 3598 // do nothing 3599 break; 3600 default: 3601 btstack_assert(false); 3602 break; 3603 } 3604 return ERROR_CODE_SUCCESS; 3605 } 3606 3607 int hci_power_control(HCI_POWER_MODE power_mode){ 3608 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3609 int err = 0; 3610 switch (hci_stack->state){ 3611 case HCI_STATE_OFF: 3612 err = hci_power_control_state_off(power_mode); 3613 break; 3614 case HCI_STATE_INITIALIZING: 3615 err = hci_power_control_state_initializing(power_mode); 3616 break; 3617 case HCI_STATE_WORKING: 3618 err = hci_power_control_state_working(power_mode); 3619 break; 3620 case HCI_STATE_HALTING: 3621 err = hci_power_control_state_halting(power_mode); 3622 break; 3623 case HCI_STATE_FALLING_ASLEEP: 3624 err = hci_power_control_state_falling_asleep(power_mode); 3625 break; 3626 case HCI_STATE_SLEEPING: 3627 err = hci_power_control_state_sleeping(power_mode); 3628 break; 3629 default: 3630 btstack_assert(false); 3631 break; 3632 } 3633 if (err != 0){ 3634 return err; 3635 } 3636 3637 // create internal event 3638 hci_emit_state(); 3639 3640 // trigger next/first action 3641 hci_run(); 3642 3643 return 0; 3644 } 3645 3646 3647 #ifdef ENABLE_CLASSIC 3648 3649 static void hci_update_scan_enable(void){ 3650 // 2 = page scan, 1 = inq scan 3651 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3652 hci_run(); 3653 } 3654 3655 void gap_discoverable_control(uint8_t enable){ 3656 if (enable) enable = 1; // normalize argument 3657 3658 if (hci_stack->discoverable == enable){ 3659 hci_emit_discoverable_enabled(hci_stack->discoverable); 3660 return; 3661 } 3662 3663 hci_stack->discoverable = enable; 3664 hci_update_scan_enable(); 3665 } 3666 3667 void gap_connectable_control(uint8_t enable){ 3668 if (enable) enable = 1; // normalize argument 3669 3670 // don't emit event 3671 if (hci_stack->connectable == enable) return; 3672 3673 hci_stack->connectable = enable; 3674 hci_update_scan_enable(); 3675 } 3676 #endif 3677 3678 void gap_local_bd_addr(bd_addr_t address_buffer){ 3679 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3680 } 3681 3682 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3683 static void hci_host_num_completed_packets(void){ 3684 3685 // create packet manually as arrays are not supported and num_commands should not get reduced 3686 hci_reserve_packet_buffer(); 3687 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3688 3689 uint16_t size = 0; 3690 uint16_t num_handles = 0; 3691 packet[size++] = 0x35; 3692 packet[size++] = 0x0c; 3693 size++; // skip param len 3694 size++; // skip num handles 3695 3696 // add { handle, packets } entries 3697 btstack_linked_item_t * it; 3698 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3699 hci_connection_t * connection = (hci_connection_t *) it; 3700 if (connection->num_packets_completed){ 3701 little_endian_store_16(packet, size, connection->con_handle); 3702 size += 2; 3703 little_endian_store_16(packet, size, connection->num_packets_completed); 3704 size += 2; 3705 // 3706 num_handles++; 3707 connection->num_packets_completed = 0; 3708 } 3709 } 3710 3711 packet[2] = size - 3; 3712 packet[3] = num_handles; 3713 3714 hci_stack->host_completed_packets = 0; 3715 3716 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3717 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3718 3719 // release packet buffer for synchronous transport implementations 3720 if (hci_transport_synchronous()){ 3721 hci_release_packet_buffer(); 3722 hci_emit_transport_packet_sent(); 3723 } 3724 } 3725 #endif 3726 3727 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3728 UNUSED(ds); 3729 hci_stack->substate = HCI_HALTING_CLOSE; 3730 // allow packet handlers to defer final shutdown 3731 hci_emit_state(); 3732 hci_run(); 3733 } 3734 3735 static bool hci_run_acl_fragments(void){ 3736 if (hci_stack->acl_fragmentation_total_size > 0u) { 3737 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3738 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3739 if (connection) { 3740 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3741 hci_send_acl_packet_fragments(connection); 3742 return true; 3743 } 3744 } else { 3745 // connection gone -> discard further fragments 3746 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3747 hci_stack->acl_fragmentation_total_size = 0; 3748 hci_stack->acl_fragmentation_pos = 0; 3749 } 3750 } 3751 return false; 3752 } 3753 3754 #ifdef ENABLE_CLASSIC 3755 static bool hci_run_general_gap_classic(void){ 3756 3757 // decline incoming connections 3758 if (hci_stack->decline_reason){ 3759 uint8_t reason = hci_stack->decline_reason; 3760 hci_stack->decline_reason = 0; 3761 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3762 return true; 3763 } 3764 // send scan enable 3765 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3766 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3767 hci_stack->new_scan_enable_value = 0xff; 3768 return true; 3769 } 3770 // start/stop inquiry 3771 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3772 uint8_t duration = hci_stack->inquiry_state; 3773 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3774 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3775 return true; 3776 } 3777 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3778 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3779 hci_send_cmd(&hci_inquiry_cancel); 3780 return true; 3781 } 3782 // remote name request 3783 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3784 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3785 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3786 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3787 return true; 3788 } 3789 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3790 // Local OOB data 3791 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 3792 hci_stack->classic_read_local_oob_data = false; 3793 if (hci_stack->local_supported_commands[1] & 0x10u){ 3794 hci_send_cmd(&hci_read_local_extended_oob_data); 3795 } else { 3796 hci_send_cmd(&hci_read_local_oob_data); 3797 } 3798 } 3799 #endif 3800 // pairing 3801 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3802 uint8_t state = hci_stack->gap_pairing_state; 3803 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3804 switch (state){ 3805 case GAP_PAIRING_STATE_SEND_PIN: 3806 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, hci_stack->gap_pairing_input.gap_pairing_pin); 3807 break; 3808 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3809 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3810 break; 3811 case GAP_PAIRING_STATE_SEND_PASSKEY: 3812 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3813 break; 3814 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3815 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3816 break; 3817 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3818 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3819 break; 3820 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3821 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3822 break; 3823 default: 3824 break; 3825 } 3826 return true; 3827 } 3828 return false; 3829 } 3830 #endif 3831 3832 #ifdef ENABLE_BLE 3833 static bool hci_run_general_gap_le(void){ 3834 3835 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3836 3837 if (hci_stack->state != HCI_STATE_WORKING) return false; 3838 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3839 3840 3841 // Phase 1: collect what to stop 3842 3843 bool scanning_stop = false; 3844 bool connecting_stop = false; 3845 bool advertising_stop = false; 3846 3847 #ifndef ENABLE_LE_CENTRAL 3848 UNUSED(scanning_stop); 3849 UNUSED(connecting_stop); 3850 #endif 3851 #ifndef ENABLE_LE_PERIPHERAL 3852 UNUSED(advertising_stop); 3853 #endif 3854 3855 // check if whitelist needs modification 3856 bool whitelist_modification_pending = false; 3857 btstack_linked_list_iterator_t lit; 3858 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3859 while (btstack_linked_list_iterator_has_next(&lit)){ 3860 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3861 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3862 whitelist_modification_pending = true; 3863 break; 3864 } 3865 } 3866 // check if resolving list needs modification 3867 bool resolving_list_modification_pending = false; 3868 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3869 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 3870 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3871 resolving_list_modification_pending = true; 3872 } 3873 #endif 3874 3875 #ifdef ENABLE_LE_CENTRAL 3876 // scanning control 3877 if (hci_stack->le_scanning_active) { 3878 // stop if: 3879 // - parameter change required 3880 // - it's disabled 3881 // - whitelist change required but used for scanning 3882 // - resolving list modified 3883 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3884 if ((hci_stack->le_scanning_param_update) || 3885 !hci_stack->le_scanning_enabled || 3886 scanning_uses_whitelist || 3887 resolving_list_modification_pending){ 3888 3889 scanning_stop = true; 3890 } 3891 } 3892 #endif 3893 3894 #ifdef ENABLE_LE_CENTRAL 3895 // connecting control 3896 bool connecting_with_whitelist; 3897 switch (hci_stack->le_connecting_state){ 3898 case LE_CONNECTING_DIRECT: 3899 case LE_CONNECTING_WHITELIST: 3900 // stop connecting if: 3901 // - connecting uses white and whitelist modification pending 3902 // - if it got disabled 3903 // - resolving list modified 3904 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 3905 if ((connecting_with_whitelist && whitelist_modification_pending) || 3906 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3907 resolving_list_modification_pending) { 3908 3909 connecting_stop = true; 3910 } 3911 break; 3912 default: 3913 break; 3914 } 3915 #endif 3916 3917 #ifdef ENABLE_LE_PERIPHERAL 3918 // le advertisement control 3919 if (hci_stack->le_advertisements_active){ 3920 // stop if: 3921 // - parameter change required 3922 // - it's disabled 3923 // - whitelist change required but used for advertisement filter policy 3924 // - resolving list modified 3925 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3926 if ((hci_stack->le_advertisements_todo != 0) || 3927 !hci_stack->le_advertisements_enabled_for_current_roles || 3928 (advertising_uses_whitelist & whitelist_modification_pending) || 3929 resolving_list_modification_pending) { 3930 3931 advertising_stop = true; 3932 } 3933 } 3934 #endif 3935 3936 3937 // Phase 2: stop everything that should be off during modifications 3938 3939 #ifdef ENABLE_LE_CENTRAL 3940 if (scanning_stop){ 3941 hci_stack->le_scanning_active = false; 3942 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3943 return true; 3944 } 3945 #endif 3946 3947 #ifdef ENABLE_LE_CENTRAL 3948 if (connecting_stop){ 3949 hci_send_cmd(&hci_le_create_connection_cancel); 3950 return true; 3951 } 3952 #endif 3953 3954 #ifdef ENABLE_LE_PERIPHERAL 3955 if (advertising_stop){ 3956 hci_stack->le_advertisements_active = false; 3957 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3958 return true; 3959 } 3960 #endif 3961 3962 // Phase 3: modify 3963 3964 #ifdef ENABLE_LE_CENTRAL 3965 if (hci_stack->le_scanning_param_update){ 3966 hci_stack->le_scanning_param_update = false; 3967 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 3968 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 3969 return true; 3970 } 3971 #endif 3972 3973 #ifdef ENABLE_LE_PERIPHERAL 3974 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3975 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3976 hci_send_cmd(&hci_le_set_advertising_parameters, 3977 hci_stack->le_advertisements_interval_min, 3978 hci_stack->le_advertisements_interval_max, 3979 hci_stack->le_advertisements_type, 3980 hci_stack->le_own_addr_type, 3981 hci_stack->le_advertisements_direct_address_type, 3982 hci_stack->le_advertisements_direct_address, 3983 hci_stack->le_advertisements_channel_map, 3984 hci_stack->le_advertisements_filter_policy); 3985 return true; 3986 } 3987 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3988 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3989 uint8_t adv_data_clean[31]; 3990 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3991 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3992 hci_stack->le_advertisements_data_len); 3993 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3994 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3995 return true; 3996 } 3997 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3998 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3999 uint8_t scan_data_clean[31]; 4000 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4001 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4002 hci_stack->le_scan_response_data_len); 4003 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4004 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4005 return true; 4006 } 4007 #endif 4008 4009 4010 #ifdef ENABLE_LE_CENTRAL 4011 // if connect with whitelist was active and is not cancelled yet, wait until next time 4012 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4013 #endif 4014 4015 // LE Whitelist Management 4016 if (whitelist_modification_pending){ 4017 // add/remove entries 4018 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4019 while (btstack_linked_list_iterator_has_next(&lit)){ 4020 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4021 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4022 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4023 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4024 return true; 4025 } 4026 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4027 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4028 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4029 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4030 return true; 4031 } 4032 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4033 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4034 btstack_memory_whitelist_entry_free(entry); 4035 } 4036 } 4037 } 4038 4039 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4040 // LE Resolving List Management 4041 if (resolving_list_supported) { 4042 uint16_t i; 4043 switch (hci_stack->le_resolving_list_state) { 4044 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4045 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4046 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4047 return true; 4048 case LE_RESOLVING_LIST_READ_SIZE: 4049 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4050 hci_send_cmd(&hci_le_read_resolving_list_size); 4051 return true; 4052 case LE_RESOLVING_LIST_SEND_CLEAR: 4053 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4054 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4055 sizeof(hci_stack->le_resolving_list_add_entries)); 4056 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4057 sizeof(hci_stack->le_resolving_list_remove_entries)); 4058 hci_send_cmd(&hci_le_clear_resolving_list); 4059 return true; 4060 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4061 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4062 uint8_t offset = i >> 3; 4063 uint8_t mask = 1 << (i & 7); 4064 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4065 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4066 bd_addr_t peer_identity_addreses; 4067 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4068 sm_key_t peer_irk; 4069 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4070 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4071 4072 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4073 // trigger whitelist entry 'update' (work around for controller bug) 4074 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4075 while (btstack_linked_list_iterator_has_next(&lit)) { 4076 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4077 if (entry->address_type != peer_identity_addr_type) continue; 4078 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4079 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4080 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4081 } 4082 #endif 4083 4084 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4085 peer_identity_addreses); 4086 return true; 4087 } 4088 4089 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4090 4091 /* fall through */ 4092 4093 case LE_RESOLVING_LIST_ADD_ENTRIES: 4094 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4095 uint8_t offset = i >> 3; 4096 uint8_t mask = 1 << (i & 7); 4097 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4098 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4099 bd_addr_t peer_identity_addreses; 4100 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4101 sm_key_t peer_irk; 4102 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4103 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4104 const uint8_t *local_irk = gap_get_persistent_irk(); 4105 // command uses format specifier 'P' that stores 16-byte value without flip 4106 uint8_t local_irk_flipped[16]; 4107 uint8_t peer_irk_flipped[16]; 4108 reverse_128(local_irk, local_irk_flipped); 4109 reverse_128(peer_irk, peer_irk_flipped); 4110 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4111 peer_irk_flipped, local_irk_flipped); 4112 return true; 4113 } 4114 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4115 break; 4116 4117 default: 4118 break; 4119 } 4120 } 4121 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4122 #endif 4123 4124 // Phase 4: restore state 4125 4126 #ifdef ENABLE_LE_CENTRAL 4127 // re-start scanning 4128 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4129 hci_stack->le_scanning_active = true; 4130 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4131 return true; 4132 } 4133 #endif 4134 4135 #ifdef ENABLE_LE_CENTRAL 4136 // re-start connecting 4137 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4138 bd_addr_t null_addr; 4139 memset(null_addr, 0, 6); 4140 hci_send_cmd(&hci_le_create_connection, 4141 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4142 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4143 1, // use whitelist 4144 0, // peer address type 4145 null_addr, // peer bd addr 4146 hci_stack->le_own_addr_type, // our addr type: 4147 hci_stack->le_connection_interval_min, // conn interval min 4148 hci_stack->le_connection_interval_max, // conn interval max 4149 hci_stack->le_connection_latency, // conn latency 4150 hci_stack->le_supervision_timeout, // conn latency 4151 hci_stack->le_minimum_ce_length, // min ce length 4152 hci_stack->le_maximum_ce_length // max ce length 4153 ); 4154 return true; 4155 } 4156 #endif 4157 4158 #ifdef ENABLE_LE_PERIPHERAL 4159 // re-start advertising 4160 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4161 // check if advertisements should be enabled given 4162 hci_stack->le_advertisements_active = true; 4163 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4164 return true; 4165 } 4166 #endif 4167 4168 return false; 4169 } 4170 #endif 4171 4172 static bool hci_run_general_pending_commands(void){ 4173 btstack_linked_item_t * it; 4174 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4175 hci_connection_t * connection = (hci_connection_t *) it; 4176 4177 switch(connection->state){ 4178 case SEND_CREATE_CONNECTION: 4179 switch(connection->address_type){ 4180 #ifdef ENABLE_CLASSIC 4181 case BD_ADDR_TYPE_ACL: 4182 log_info("sending hci_create_connection"); 4183 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4184 break; 4185 #endif 4186 default: 4187 #ifdef ENABLE_BLE 4188 #ifdef ENABLE_LE_CENTRAL 4189 log_info("sending hci_le_create_connection"); 4190 hci_send_cmd(&hci_le_create_connection, 4191 hci_stack->le_connection_scan_interval, // conn scan interval 4192 hci_stack->le_connection_scan_window, // conn scan windows 4193 0, // don't use whitelist 4194 connection->address_type, // peer address type 4195 connection->address, // peer bd addr 4196 hci_stack->le_own_addr_type, // our addr type: 4197 hci_stack->le_connection_interval_min, // conn interval min 4198 hci_stack->le_connection_interval_max, // conn interval max 4199 hci_stack->le_connection_latency, // conn latency 4200 hci_stack->le_supervision_timeout, // conn latency 4201 hci_stack->le_minimum_ce_length, // min ce length 4202 hci_stack->le_maximum_ce_length // max ce length 4203 ); 4204 connection->state = SENT_CREATE_CONNECTION; 4205 #endif 4206 #endif 4207 break; 4208 } 4209 return true; 4210 4211 #ifdef ENABLE_CLASSIC 4212 case RECEIVED_CONNECTION_REQUEST: 4213 connection->role = HCI_ROLE_SLAVE; 4214 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4215 log_info("sending hci_accept_connection_request"); 4216 connection->state = ACCEPTED_CONNECTION_REQUEST; 4217 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4218 } 4219 return true; 4220 #endif 4221 4222 #ifdef ENABLE_BLE 4223 #ifdef ENABLE_LE_CENTRAL 4224 case SEND_CANCEL_CONNECTION: 4225 connection->state = SENT_CANCEL_CONNECTION; 4226 hci_send_cmd(&hci_le_create_connection_cancel); 4227 return true; 4228 #endif 4229 #endif 4230 case SEND_DISCONNECT: 4231 connection->state = SENT_DISCONNECT; 4232 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4233 return true; 4234 4235 default: 4236 break; 4237 } 4238 4239 // no further commands if connection is about to get shut down 4240 if (connection->state == SENT_DISCONNECT) continue; 4241 4242 if (connection->authentication_flags & READ_RSSI){ 4243 connectionClearAuthenticationFlags(connection, READ_RSSI); 4244 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4245 return true; 4246 } 4247 4248 #ifdef ENABLE_CLASSIC 4249 4250 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4251 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4252 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4253 return true; 4254 } 4255 4256 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4257 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4258 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4259 4260 link_key_t link_key; 4261 link_key_type_t link_key_type; 4262 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4263 4264 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4265 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4266 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4267 if (sc_downgrade){ 4268 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4269 connection->state = SENT_DISCONNECT; 4270 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4271 return true; 4272 } 4273 4274 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4275 if (have_link_key && security_level_sufficient){ 4276 connection->link_key_type = link_key_type; 4277 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4278 } else { 4279 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4280 } 4281 return true; 4282 } 4283 4284 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4285 log_info("denying to pin request"); 4286 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4287 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4288 return true; 4289 } 4290 4291 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4292 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4293 // tweak authentication requirements 4294 uint8_t authreq = hci_stack->ssp_authentication_requirement; 4295 if (connection->bonding_flags & BONDING_DEDICATED){ 4296 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4297 } 4298 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4299 authreq |= 1; 4300 } 4301 uint8_t have_oob_data = 0; 4302 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4303 if (connection->classic_oob_c_192 != NULL){ 4304 have_oob_data |= 1; 4305 } 4306 if (connection->classic_oob_c_256 != NULL){ 4307 have_oob_data |= 2; 4308 } 4309 #endif 4310 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4311 return true; 4312 } 4313 4314 if (connection->authentication_flags & SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4315 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4316 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4317 return true; 4318 } 4319 4320 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4321 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4322 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4323 const uint8_t zero[16] = { 0 }; 4324 const uint8_t * r_192 = zero; 4325 const uint8_t * c_192 = zero; 4326 const uint8_t * r_256 = zero; 4327 const uint8_t * c_256 = zero; 4328 // verify P-256 OOB 4329 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4330 c_256 = connection->classic_oob_c_256; 4331 if (connection->classic_oob_r_256 != NULL) { 4332 r_256 = connection->classic_oob_r_256; 4333 } 4334 } 4335 // verify P-192 OOB 4336 if ((connection->classic_oob_c_192 != NULL)) { 4337 c_192 = connection->classic_oob_c_192; 4338 if (connection->classic_oob_r_192 != NULL) { 4339 r_192 = connection->classic_oob_r_192; 4340 } 4341 } 4342 // Reply 4343 if (c_256 != zero) { 4344 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4345 } else if (c_192 != zero){ 4346 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4347 } else { 4348 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4349 } 4350 return true; 4351 } 4352 #endif 4353 4354 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4355 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4356 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4357 return true; 4358 } 4359 4360 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4361 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4362 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4363 return true; 4364 } 4365 4366 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4367 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4368 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4369 return true; 4370 } 4371 4372 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4373 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4374 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4375 return true; 4376 } 4377 4378 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4379 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4380 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4381 return true; 4382 } 4383 4384 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4385 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4386 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4387 connection->state = SENT_DISCONNECT; 4388 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4389 return true; 4390 } 4391 4392 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4393 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4394 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4395 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4396 return true; 4397 } 4398 4399 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4400 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4401 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4402 return true; 4403 } 4404 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4405 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4406 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4407 return true; 4408 } 4409 #endif 4410 4411 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4412 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4413 if (connection->state != SENT_DISCONNECT){ 4414 connection->state = SENT_DISCONNECT; 4415 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4416 return true; 4417 } 4418 } 4419 4420 #ifdef ENABLE_CLASSIC 4421 uint16_t sniff_min_interval; 4422 switch (connection->sniff_min_interval){ 4423 case 0: 4424 break; 4425 case 0xffff: 4426 connection->sniff_min_interval = 0; 4427 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4428 return true; 4429 default: 4430 sniff_min_interval = connection->sniff_min_interval; 4431 connection->sniff_min_interval = 0; 4432 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4433 return true; 4434 } 4435 4436 if (connection->request_role != HCI_ROLE_INVALID){ 4437 hci_role_t role = connection->request_role; 4438 connection->request_role = HCI_ROLE_INVALID; 4439 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4440 return true; 4441 } 4442 #endif 4443 4444 #ifdef ENABLE_BLE 4445 switch (connection->le_con_parameter_update_state){ 4446 // response to L2CAP CON PARAMETER UPDATE REQUEST 4447 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4448 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4449 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4450 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4451 0x0000, 0xffff); 4452 return true; 4453 case CON_PARAMETER_UPDATE_REPLY: 4454 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4455 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4456 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4457 0x0000, 0xffff); 4458 return true; 4459 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4460 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4461 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4462 return true; 4463 default: 4464 break; 4465 } 4466 if (connection->le_phy_update_all_phys != 0xffu){ 4467 uint8_t all_phys = connection->le_phy_update_all_phys; 4468 connection->le_phy_update_all_phys = 0xff; 4469 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); 4470 return true; 4471 } 4472 #endif 4473 } 4474 return false; 4475 } 4476 4477 static void hci_run(void){ 4478 4479 bool done; 4480 4481 // send continuation fragments first, as they block the prepared packet buffer 4482 done = hci_run_acl_fragments(); 4483 if (done) return; 4484 4485 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4486 // send host num completed packets next as they don't require num_cmd_packets > 0 4487 if (!hci_can_send_comand_packet_transport()) return; 4488 if (hci_stack->host_completed_packets){ 4489 hci_host_num_completed_packets(); 4490 return; 4491 } 4492 #endif 4493 4494 if (!hci_can_send_command_packet_now()) return; 4495 4496 // global/non-connection oriented commands 4497 4498 4499 #ifdef ENABLE_CLASSIC 4500 // general gap classic 4501 done = hci_run_general_gap_classic(); 4502 if (done) return; 4503 #endif 4504 4505 #ifdef ENABLE_BLE 4506 // general gap le 4507 done = hci_run_general_gap_le(); 4508 if (done) return; 4509 #endif 4510 4511 // send pending HCI commands 4512 done = hci_run_general_pending_commands(); 4513 if (done) return; 4514 4515 // stack state sub statemachines 4516 hci_connection_t * connection; 4517 switch (hci_stack->state){ 4518 case HCI_STATE_INITIALIZING: 4519 hci_initializing_run(); 4520 break; 4521 4522 case HCI_STATE_HALTING: 4523 4524 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4525 switch (hci_stack->substate){ 4526 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4527 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4528 4529 #ifdef ENABLE_BLE 4530 #ifdef ENABLE_LE_CENTRAL 4531 // free whitelist entries 4532 { 4533 btstack_linked_list_iterator_t lit; 4534 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4535 while (btstack_linked_list_iterator_has_next(&lit)){ 4536 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4537 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4538 btstack_memory_whitelist_entry_free(entry); 4539 } 4540 } 4541 #endif 4542 #endif 4543 // close all open connections 4544 connection = (hci_connection_t *) hci_stack->connections; 4545 if (connection){ 4546 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4547 if (!hci_can_send_command_packet_now()) return; 4548 4549 // check state 4550 if (connection->state == SENT_DISCONNECT) return; 4551 connection->state = SENT_DISCONNECT; 4552 4553 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4554 4555 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4556 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4557 4558 // ... which would be ignored anyway as we shutdown (free) the connection now 4559 hci_shutdown_connection(connection); 4560 4561 // finally, send the disconnect command 4562 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4563 return; 4564 } 4565 4566 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4567 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4568 log_info("HCI_STATE_HALTING: wait 50 ms"); 4569 hci_stack->substate = HCI_HALTING_W4_TIMER; 4570 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4571 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4572 btstack_run_loop_add_timer(&hci_stack->timeout); 4573 break; 4574 } 4575 4576 /* fall through */ 4577 4578 case HCI_HALTING_CLOSE: 4579 log_info("HCI_STATE_HALTING, calling off"); 4580 4581 // switch mode 4582 hci_power_control_off(); 4583 4584 log_info("HCI_STATE_HALTING, emitting state"); 4585 hci_emit_state(); 4586 log_info("HCI_STATE_HALTING, done"); 4587 break; 4588 4589 case HCI_HALTING_W4_TIMER: 4590 // keep waiting 4591 4592 break; 4593 default: 4594 break; 4595 } 4596 4597 break; 4598 4599 case HCI_STATE_FALLING_ASLEEP: 4600 switch(hci_stack->substate) { 4601 case HCI_FALLING_ASLEEP_DISCONNECT: 4602 log_info("HCI_STATE_FALLING_ASLEEP"); 4603 // close all open connections 4604 connection = (hci_connection_t *) hci_stack->connections; 4605 4606 #ifdef HAVE_PLATFORM_IPHONE_OS 4607 // don't close connections, if H4 supports power management 4608 if (btstack_control_iphone_power_management_enabled()){ 4609 connection = NULL; 4610 } 4611 #endif 4612 if (connection){ 4613 4614 // send disconnect 4615 if (!hci_can_send_command_packet_now()) return; 4616 4617 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4618 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4619 4620 // send disconnected event right away - causes higher layer connections to get closed, too. 4621 hci_shutdown_connection(connection); 4622 return; 4623 } 4624 4625 if (hci_classic_supported()){ 4626 // disable page and inquiry scan 4627 if (!hci_can_send_command_packet_now()) return; 4628 4629 log_info("HCI_STATE_HALTING, disabling inq scans"); 4630 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4631 4632 // continue in next sub state 4633 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4634 break; 4635 } 4636 4637 /* fall through */ 4638 4639 case HCI_FALLING_ASLEEP_COMPLETE: 4640 log_info("HCI_STATE_HALTING, calling sleep"); 4641 #ifdef HAVE_PLATFORM_IPHONE_OS 4642 // don't actually go to sleep, if H4 supports power management 4643 if (btstack_control_iphone_power_management_enabled()){ 4644 // SLEEP MODE reached 4645 hci_stack->state = HCI_STATE_SLEEPING; 4646 hci_emit_state(); 4647 break; 4648 } 4649 #endif 4650 // switch mode 4651 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4652 hci_emit_state(); 4653 break; 4654 4655 default: 4656 break; 4657 } 4658 break; 4659 4660 default: 4661 break; 4662 } 4663 } 4664 4665 int hci_send_cmd_packet(uint8_t *packet, int size){ 4666 // house-keeping 4667 4668 #ifdef ENABLE_CLASSIC 4669 bd_addr_t addr; 4670 hci_connection_t * conn; 4671 #endif 4672 #ifdef ENABLE_LE_CENTRAL 4673 uint8_t initiator_filter_policy; 4674 #endif 4675 4676 uint16_t opcode = little_endian_read_16(packet, 0); 4677 switch (opcode) { 4678 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4679 hci_stack->loopback_mode = packet[3]; 4680 break; 4681 4682 #ifdef ENABLE_CLASSIC 4683 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4684 reverse_bd_addr(&packet[3], addr); 4685 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4686 4687 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4688 if (!conn) { 4689 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4690 if (!conn) { 4691 // notify client that alloc failed 4692 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4693 return -1; // packet not sent to controller 4694 } 4695 conn->state = SEND_CREATE_CONNECTION; 4696 conn->role = HCI_ROLE_MASTER; 4697 } 4698 log_info("conn state %u", conn->state); 4699 switch (conn->state) { 4700 // if connection active exists 4701 case OPEN: 4702 // and OPEN, emit connection complete command 4703 hci_emit_connection_complete(addr, conn->con_handle, 0); 4704 return -1; // packet not sent to controller 4705 case RECEIVED_DISCONNECTION_COMPLETE: 4706 // create connection triggered in disconnect complete event, let's do it now 4707 break; 4708 case SEND_CREATE_CONNECTION: 4709 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4710 break; 4711 default: 4712 // otherwise, just ignore as it is already in the open process 4713 return -1; // packet not sent to controller 4714 } 4715 conn->state = SENT_CREATE_CONNECTION; 4716 4717 // track outgoing connection 4718 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4719 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4720 break; 4721 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4722 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4723 break; 4724 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4725 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4726 break; 4727 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4728 if (hci_stack->link_key_db) { 4729 reverse_bd_addr(&packet[3], addr); 4730 hci_stack->link_key_db->delete_link_key(addr); 4731 } 4732 break; 4733 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4734 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4735 reverse_bd_addr(&packet[3], addr); 4736 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4737 if (conn) { 4738 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4739 } 4740 break; 4741 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4742 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4743 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4744 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4745 reverse_bd_addr(&packet[3], addr); 4746 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4747 if (conn) { 4748 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4749 } 4750 break; 4751 4752 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 4753 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4754 // setup_synchronous_connection? Voice setting at offset 22 4755 // TODO: compare to current setting if sco connection already active 4756 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4757 break; 4758 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4759 // accept_synchronus_connection? Voice setting at offset 18 4760 // TODO: compare to current setting if sco connection already active 4761 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4762 break; 4763 #endif 4764 #endif 4765 4766 #ifdef ENABLE_BLE 4767 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4768 hci_stack->le_random_address_set = 1; 4769 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4770 break; 4771 #ifdef ENABLE_LE_PERIPHERAL 4772 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4773 hci_stack->le_advertisements_active = packet[3] != 0; 4774 break; 4775 #endif 4776 #ifdef ENABLE_LE_CENTRAL 4777 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4778 // white list used? 4779 initiator_filter_policy = packet[7]; 4780 switch (initiator_filter_policy) { 4781 case 0: 4782 // whitelist not used 4783 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4784 break; 4785 case 1: 4786 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4787 break; 4788 default: 4789 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4790 break; 4791 } 4792 // track outgoing connection 4793 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4794 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4795 break; 4796 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4797 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4798 break; 4799 #endif 4800 #endif 4801 default: 4802 break; 4803 } 4804 4805 hci_stack->num_cmd_packets--; 4806 4807 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4808 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4809 } 4810 4811 // disconnect because of security block 4812 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4813 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4814 if (!connection) return; 4815 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4816 } 4817 4818 4819 // Configure Secure Simple Pairing 4820 4821 #ifdef ENABLE_CLASSIC 4822 4823 // enable will enable SSP during init 4824 void gap_ssp_set_enable(int enable){ 4825 hci_stack->ssp_enable = enable; 4826 } 4827 4828 static int hci_local_ssp_activated(void){ 4829 return gap_ssp_supported() && hci_stack->ssp_enable; 4830 } 4831 4832 // if set, BTstack will respond to io capability request using authentication requirement 4833 void gap_ssp_set_io_capability(int io_capability){ 4834 hci_stack->ssp_io_capability = io_capability; 4835 } 4836 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4837 hci_stack->ssp_authentication_requirement = authentication_requirement; 4838 } 4839 4840 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4841 void gap_ssp_set_auto_accept(int auto_accept){ 4842 hci_stack->ssp_auto_accept = auto_accept; 4843 } 4844 4845 void gap_secure_connections_enable(bool enable){ 4846 hci_stack->secure_connections_enable = enable; 4847 } 4848 4849 #endif 4850 4851 // va_list part of hci_send_cmd 4852 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4853 if (!hci_can_send_command_packet_now()){ 4854 log_error("hci_send_cmd called but cannot send packet now"); 4855 return 0; 4856 } 4857 4858 // for HCI INITIALIZATION 4859 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4860 hci_stack->last_cmd_opcode = cmd->opcode; 4861 4862 hci_reserve_packet_buffer(); 4863 uint8_t * packet = hci_stack->hci_packet_buffer; 4864 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4865 int err = hci_send_cmd_packet(packet, size); 4866 4867 // release packet buffer on error or for synchronous transport implementations 4868 if ((err < 0) || hci_transport_synchronous()){ 4869 hci_release_packet_buffer(); 4870 hci_emit_transport_packet_sent(); 4871 } 4872 4873 return err; 4874 } 4875 4876 /** 4877 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4878 */ 4879 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4880 va_list argptr; 4881 va_start(argptr, cmd); 4882 int res = hci_send_cmd_va_arg(cmd, argptr); 4883 va_end(argptr); 4884 return res; 4885 } 4886 4887 // Create various non-HCI events. 4888 // TODO: generalize, use table similar to hci_create_command 4889 4890 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4891 // dump packet 4892 if (dump) { 4893 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4894 } 4895 4896 // dispatch to all event handlers 4897 btstack_linked_list_iterator_t it; 4898 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4899 while (btstack_linked_list_iterator_has_next(&it)){ 4900 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4901 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4902 } 4903 } 4904 4905 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4906 if (!hci_stack->acl_packet_handler) return; 4907 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4908 } 4909 4910 #ifdef ENABLE_CLASSIC 4911 static void hci_notify_if_sco_can_send_now(void){ 4912 // notify SCO sender if waiting 4913 if (!hci_stack->sco_waiting_for_can_send_now) return; 4914 if (hci_can_send_sco_packet_now()){ 4915 hci_stack->sco_waiting_for_can_send_now = 0; 4916 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4917 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4918 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4919 } 4920 } 4921 4922 // parsing end emitting has been merged to reduce code size 4923 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4924 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4925 4926 uint8_t * eir_data; 4927 ad_context_t context; 4928 const uint8_t * name; 4929 uint8_t name_len; 4930 4931 if (size < 3) return; 4932 4933 int event_type = hci_event_packet_get_type(packet); 4934 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4935 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4936 4937 switch (event_type){ 4938 case HCI_EVENT_INQUIRY_RESULT: 4939 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4940 if (size != (3 + (num_responses * 14))) return; 4941 break; 4942 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4943 if (size != 257) return; 4944 if (num_responses != 1) return; 4945 break; 4946 default: 4947 return; 4948 } 4949 4950 // event[1] is set at the end 4951 int i; 4952 for (i=0; i<num_responses;i++){ 4953 memset(event, 0, sizeof(event)); 4954 event[0] = GAP_EVENT_INQUIRY_RESULT; 4955 uint8_t event_size = 18; // if name is not set by EIR 4956 4957 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4958 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4959 (void)memcpy(&event[9], 4960 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4961 3); // class of device 4962 (void)memcpy(&event[12], 4963 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4964 2); // clock offset 4965 4966 switch (event_type){ 4967 case HCI_EVENT_INQUIRY_RESULT: 4968 // 14,15,16,17 = 0, size 18 4969 break; 4970 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4971 event[14] = 1; 4972 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4973 // 16,17 = 0, size 18 4974 break; 4975 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4976 event[14] = 1; 4977 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4978 // EIR packets only contain a single inquiry response 4979 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4980 name = NULL; 4981 // Iterate over EIR data 4982 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4983 uint8_t data_type = ad_iterator_get_data_type(&context); 4984 uint8_t data_size = ad_iterator_get_data_len(&context); 4985 const uint8_t * data = ad_iterator_get_data(&context); 4986 // Prefer Complete Local Name over Shortend Local Name 4987 switch (data_type){ 4988 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4989 if (name) continue; 4990 /* fall through */ 4991 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4992 name = data; 4993 name_len = data_size; 4994 break; 4995 default: 4996 break; 4997 } 4998 } 4999 if (name){ 5000 event[16] = 1; 5001 // truncate name if needed 5002 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5003 event[17] = len; 5004 (void)memcpy(&event[18], name, len); 5005 event_size += len; 5006 } 5007 break; 5008 default: 5009 return; 5010 } 5011 event[1] = event_size - 2; 5012 hci_emit_event(event, event_size, 1); 5013 } 5014 } 5015 #endif 5016 5017 void hci_emit_state(void){ 5018 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5019 uint8_t event[3]; 5020 event[0] = BTSTACK_EVENT_STATE; 5021 event[1] = sizeof(event) - 2u; 5022 event[2] = hci_stack->state; 5023 hci_emit_event(event, sizeof(event), 1); 5024 } 5025 5026 #ifdef ENABLE_CLASSIC 5027 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5028 uint8_t event[13]; 5029 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5030 event[1] = sizeof(event) - 2; 5031 event[2] = status; 5032 little_endian_store_16(event, 3, con_handle); 5033 reverse_bd_addr(address, &event[5]); 5034 event[11] = 1; // ACL connection 5035 event[12] = 0; // encryption disabled 5036 hci_emit_event(event, sizeof(event), 1); 5037 } 5038 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5039 if (disable_l2cap_timeouts) return; 5040 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5041 uint8_t event[4]; 5042 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5043 event[1] = sizeof(event) - 2; 5044 little_endian_store_16(event, 2, conn->con_handle); 5045 hci_emit_event(event, sizeof(event), 1); 5046 } 5047 #endif 5048 5049 #ifdef ENABLE_BLE 5050 #ifdef ENABLE_LE_CENTRAL 5051 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){ 5052 uint8_t event[21]; 5053 event[0] = HCI_EVENT_LE_META; 5054 event[1] = sizeof(event) - 2u; 5055 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5056 event[3] = status; 5057 little_endian_store_16(event, 4, con_handle); 5058 event[6] = 0; // TODO: role 5059 event[7] = address_type; 5060 reverse_bd_addr(address, &event[8]); 5061 little_endian_store_16(event, 14, 0); // interval 5062 little_endian_store_16(event, 16, 0); // latency 5063 little_endian_store_16(event, 18, 0); // supervision timeout 5064 event[20] = 0; // master clock accuracy 5065 hci_emit_event(event, sizeof(event), 1); 5066 } 5067 #endif 5068 #endif 5069 5070 static void hci_emit_transport_packet_sent(void){ 5071 // notify upper stack that it might be possible to send again 5072 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5073 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5074 } 5075 5076 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5077 uint8_t event[6]; 5078 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5079 event[1] = sizeof(event) - 2u; 5080 event[2] = 0; // status = OK 5081 little_endian_store_16(event, 3, con_handle); 5082 event[5] = reason; 5083 hci_emit_event(event, sizeof(event), 1); 5084 } 5085 5086 static void hci_emit_nr_connections_changed(void){ 5087 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5088 uint8_t event[3]; 5089 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5090 event[1] = sizeof(event) - 2u; 5091 event[2] = nr_hci_connections(); 5092 hci_emit_event(event, sizeof(event), 1); 5093 } 5094 5095 static void hci_emit_hci_open_failed(void){ 5096 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5097 uint8_t event[2]; 5098 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5099 event[1] = sizeof(event) - 2u; 5100 hci_emit_event(event, sizeof(event), 1); 5101 } 5102 5103 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5104 log_info("hci_emit_dedicated_bonding_result %u ", status); 5105 uint8_t event[9]; 5106 int pos = 0; 5107 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5108 event[pos++] = sizeof(event) - 2u; 5109 event[pos++] = status; 5110 reverse_bd_addr(address, &event[pos]); 5111 hci_emit_event(event, sizeof(event), 1); 5112 } 5113 5114 5115 #ifdef ENABLE_CLASSIC 5116 5117 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5118 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5119 uint8_t event[5]; 5120 int pos = 0; 5121 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5122 event[pos++] = sizeof(event) - 2; 5123 little_endian_store_16(event, 2, con_handle); 5124 pos += 2; 5125 event[pos++] = level; 5126 hci_emit_event(event, sizeof(event), 1); 5127 } 5128 5129 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5130 if (!connection) return LEVEL_0; 5131 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5132 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5133 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5134 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5135 // LEVEL 4 always requires 128 bit encrytion key size 5136 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5137 security_level = LEVEL_3; 5138 } 5139 return security_level; 5140 } 5141 5142 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5143 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5144 uint8_t event[3]; 5145 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5146 event[1] = sizeof(event) - 2; 5147 event[2] = enabled; 5148 hci_emit_event(event, sizeof(event), 1); 5149 } 5150 5151 // query if remote side supports eSCO 5152 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5153 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5154 if (!connection) return 0; 5155 return (connection->remote_supported_features[0] & 1) != 0; 5156 } 5157 5158 static bool hci_ssp_supported(hci_connection_t * connection){ 5159 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5160 return (connection->bonding_flags & mask) == mask; 5161 } 5162 5163 // query if remote side supports SSP 5164 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5165 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5166 if (!connection) return 0; 5167 return hci_ssp_supported(connection) ? 1 : 0; 5168 } 5169 5170 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5171 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5172 } 5173 5174 // GAP API 5175 /** 5176 * @bbrief enable/disable bonding. default is enabled 5177 * @praram enabled 5178 */ 5179 void gap_set_bondable_mode(int enable){ 5180 hci_stack->bondable = enable ? 1 : 0; 5181 } 5182 /** 5183 * @brief Get bondable mode. 5184 * @return 1 if bondable 5185 */ 5186 int gap_get_bondable_mode(void){ 5187 return hci_stack->bondable; 5188 } 5189 5190 /** 5191 * @brief map link keys to security levels 5192 */ 5193 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5194 switch (link_key_type){ 5195 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5196 return LEVEL_4; 5197 case COMBINATION_KEY: 5198 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5199 return LEVEL_3; 5200 default: 5201 return LEVEL_2; 5202 } 5203 } 5204 5205 /** 5206 * @brief map link keys to secure connection yes/no 5207 */ 5208 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5209 switch (link_key_type){ 5210 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5211 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5212 return 1; 5213 default: 5214 return 0; 5215 } 5216 } 5217 5218 /** 5219 * @brief map link keys to authenticated 5220 */ 5221 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5222 switch (link_key_type){ 5223 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5224 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5225 return 1; 5226 default: 5227 return 0; 5228 } 5229 } 5230 5231 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5232 log_info("gap_mitm_protection_required_for_security_level %u", level); 5233 return level > LEVEL_2; 5234 } 5235 5236 /** 5237 * @brief get current security level 5238 */ 5239 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5240 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5241 if (!connection) return LEVEL_0; 5242 return gap_security_level_for_connection(connection); 5243 } 5244 5245 /** 5246 * @brief request connection to device to 5247 * @result GAP_AUTHENTICATION_RESULT 5248 */ 5249 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5250 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5251 if (!connection){ 5252 hci_emit_security_level(con_handle, LEVEL_0); 5253 return; 5254 } 5255 5256 btstack_assert(hci_is_le_connection(connection) == false); 5257 5258 gap_security_level_t current_level = gap_security_level(con_handle); 5259 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5260 requested_level, connection->requested_security_level, current_level); 5261 5262 // assumption: earlier requested security higher than current level => security request is active 5263 if (current_level < connection->requested_security_level){ 5264 if (connection->requested_security_level < requested_level){ 5265 // increase requested level as new level is higher 5266 5267 // TODO: handle re-authentication when done 5268 5269 connection->requested_security_level = requested_level; 5270 } 5271 return; 5272 } 5273 5274 // no request active, notify if security sufficient 5275 if (requested_level <= current_level){ 5276 hci_emit_security_level(con_handle, current_level); 5277 return; 5278 } 5279 5280 // store request 5281 connection->requested_security_level = requested_level; 5282 5283 // start to authenticate connection if authentication not already active 5284 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5285 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5286 hci_run(); 5287 } 5288 5289 /** 5290 * @brief start dedicated bonding with device. disconnect after bonding 5291 * @param device 5292 * @param request MITM protection 5293 * @result GAP_DEDICATED_BONDING_COMPLETE 5294 */ 5295 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5296 5297 // create connection state machine 5298 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5299 5300 if (!connection){ 5301 return BTSTACK_MEMORY_ALLOC_FAILED; 5302 } 5303 5304 // delete linkn key 5305 gap_drop_link_key_for_bd_addr(device); 5306 5307 // configure LEVEL_2/3, dedicated bonding 5308 connection->state = SEND_CREATE_CONNECTION; 5309 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5310 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5311 connection->bonding_flags = BONDING_DEDICATED; 5312 5313 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5314 5315 // handle: connnection failure (connection complete != ok) 5316 // handle: authentication failure 5317 // handle: disconnect on done 5318 5319 hci_run(); 5320 5321 return 0; 5322 } 5323 #endif 5324 5325 void gap_set_local_name(const char * local_name){ 5326 hci_stack->local_name = local_name; 5327 } 5328 5329 5330 #ifdef ENABLE_BLE 5331 5332 #ifdef ENABLE_LE_CENTRAL 5333 void gap_start_scan(void){ 5334 hci_stack->le_scanning_enabled = true; 5335 hci_run(); 5336 } 5337 5338 void gap_stop_scan(void){ 5339 hci_stack->le_scanning_enabled = false; 5340 hci_run(); 5341 } 5342 5343 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5344 hci_stack->le_scan_type = scan_type; 5345 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5346 hci_stack->le_scan_interval = scan_interval; 5347 hci_stack->le_scan_window = scan_window; 5348 hci_stack->le_scanning_param_update = true; 5349 hci_run(); 5350 } 5351 5352 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5353 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5354 } 5355 5356 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5357 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5358 if (!conn){ 5359 // disallow if le connection is already outgoing 5360 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5361 log_error("le connection already active"); 5362 return ERROR_CODE_COMMAND_DISALLOWED; 5363 } 5364 5365 log_info("gap_connect: no connection exists yet, creating context"); 5366 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5367 if (!conn){ 5368 // notify client that alloc failed 5369 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5370 log_info("gap_connect: failed to alloc hci_connection_t"); 5371 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5372 } 5373 5374 // set le connecting state 5375 if (hci_is_le_connection_type(addr_type)){ 5376 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5377 } 5378 5379 conn->state = SEND_CREATE_CONNECTION; 5380 log_info("gap_connect: send create connection next"); 5381 hci_run(); 5382 return ERROR_CODE_SUCCESS; 5383 } 5384 5385 if (!hci_is_le_connection(conn) || 5386 (conn->state == SEND_CREATE_CONNECTION) || 5387 (conn->state == SENT_CREATE_CONNECTION)) { 5388 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5389 log_error("gap_connect: classic connection or connect is already being created"); 5390 return GATT_CLIENT_IN_WRONG_STATE; 5391 } 5392 5393 // check if connection was just disconnected 5394 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5395 log_info("gap_connect: send create connection (again)"); 5396 conn->state = SEND_CREATE_CONNECTION; 5397 hci_run(); 5398 return ERROR_CODE_SUCCESS; 5399 } 5400 5401 log_info("gap_connect: context exists with state %u", conn->state); 5402 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5403 hci_run(); 5404 return ERROR_CODE_SUCCESS; 5405 } 5406 5407 // @assumption: only a single outgoing LE Connection exists 5408 static hci_connection_t * gap_get_outgoing_connection(void){ 5409 btstack_linked_item_t *it; 5410 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5411 hci_connection_t * conn = (hci_connection_t *) it; 5412 if (!hci_is_le_connection(conn)) continue; 5413 switch (conn->state){ 5414 case SEND_CREATE_CONNECTION: 5415 case SENT_CREATE_CONNECTION: 5416 case SENT_CANCEL_CONNECTION: 5417 return conn; 5418 default: 5419 break; 5420 }; 5421 } 5422 return NULL; 5423 } 5424 5425 uint8_t gap_connect_cancel(void){ 5426 hci_connection_t * conn = gap_get_outgoing_connection(); 5427 if (!conn) return 0; 5428 switch (conn->state){ 5429 case SEND_CREATE_CONNECTION: 5430 // skip sending create connection and emit event instead 5431 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5432 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5433 btstack_memory_hci_connection_free( conn ); 5434 break; 5435 case SENT_CREATE_CONNECTION: 5436 // request to send cancel connection 5437 conn->state = SEND_CANCEL_CONNECTION; 5438 hci_run(); 5439 break; 5440 default: 5441 break; 5442 } 5443 return 0; 5444 } 5445 #endif 5446 5447 #ifdef ENABLE_LE_CENTRAL 5448 /** 5449 * @brief Set connection parameters for outgoing connections 5450 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5451 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5452 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5453 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5454 * @param conn_latency, default: 4 5455 * @param supervision_timeout (unit: 10ms), default: 720 ms 5456 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5457 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5458 */ 5459 5460 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5461 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5462 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5463 hci_stack->le_connection_scan_interval = conn_scan_interval; 5464 hci_stack->le_connection_scan_window = conn_scan_window; 5465 hci_stack->le_connection_interval_min = conn_interval_min; 5466 hci_stack->le_connection_interval_max = conn_interval_max; 5467 hci_stack->le_connection_latency = conn_latency; 5468 hci_stack->le_supervision_timeout = supervision_timeout; 5469 hci_stack->le_minimum_ce_length = min_ce_length; 5470 hci_stack->le_maximum_ce_length = max_ce_length; 5471 } 5472 #endif 5473 5474 /** 5475 * @brief Updates the connection parameters for a given LE connection 5476 * @param handle 5477 * @param conn_interval_min (unit: 1.25ms) 5478 * @param conn_interval_max (unit: 1.25ms) 5479 * @param conn_latency 5480 * @param supervision_timeout (unit: 10ms) 5481 * @returns 0 if ok 5482 */ 5483 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5484 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5485 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5486 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5487 connection->le_conn_interval_min = conn_interval_min; 5488 connection->le_conn_interval_max = conn_interval_max; 5489 connection->le_conn_latency = conn_latency; 5490 connection->le_supervision_timeout = supervision_timeout; 5491 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5492 hci_run(); 5493 return 0; 5494 } 5495 5496 /** 5497 * @brief Request an update of the connection parameter for a given LE connection 5498 * @param handle 5499 * @param conn_interval_min (unit: 1.25ms) 5500 * @param conn_interval_max (unit: 1.25ms) 5501 * @param conn_latency 5502 * @param supervision_timeout (unit: 10ms) 5503 * @returns 0 if ok 5504 */ 5505 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5506 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5507 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5508 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5509 connection->le_conn_interval_min = conn_interval_min; 5510 connection->le_conn_interval_max = conn_interval_max; 5511 connection->le_conn_latency = conn_latency; 5512 connection->le_supervision_timeout = supervision_timeout; 5513 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5514 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5515 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5516 return 0; 5517 } 5518 5519 #ifdef ENABLE_LE_PERIPHERAL 5520 5521 /** 5522 * @brief Set Advertisement Data 5523 * @param advertising_data_length 5524 * @param advertising_data (max 31 octets) 5525 * @note data is not copied, pointer has to stay valid 5526 */ 5527 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5528 hci_stack->le_advertisements_data_len = advertising_data_length; 5529 hci_stack->le_advertisements_data = advertising_data; 5530 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5531 hci_run(); 5532 } 5533 5534 /** 5535 * @brief Set Scan Response Data 5536 * @param advertising_data_length 5537 * @param advertising_data (max 31 octets) 5538 * @note data is not copied, pointer has to stay valid 5539 */ 5540 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5541 hci_stack->le_scan_response_data_len = scan_response_data_length; 5542 hci_stack->le_scan_response_data = scan_response_data; 5543 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5544 hci_run(); 5545 } 5546 5547 /** 5548 * @brief Set Advertisement Parameters 5549 * @param adv_int_min 5550 * @param adv_int_max 5551 * @param adv_type 5552 * @param direct_address_type 5553 * @param direct_address 5554 * @param channel_map 5555 * @param filter_policy 5556 * 5557 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5558 */ 5559 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5560 uint8_t direct_address_typ, bd_addr_t direct_address, 5561 uint8_t channel_map, uint8_t filter_policy) { 5562 5563 hci_stack->le_advertisements_interval_min = adv_int_min; 5564 hci_stack->le_advertisements_interval_max = adv_int_max; 5565 hci_stack->le_advertisements_type = adv_type; 5566 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5567 hci_stack->le_advertisements_channel_map = channel_map; 5568 hci_stack->le_advertisements_filter_policy = filter_policy; 5569 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5570 6); 5571 5572 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5573 hci_run(); 5574 } 5575 5576 /** 5577 * @brief Enable/Disable Advertisements 5578 * @param enabled 5579 */ 5580 void gap_advertisements_enable(int enabled){ 5581 hci_stack->le_advertisements_enabled = enabled != 0; 5582 hci_update_advertisements_enabled_for_current_roles(); 5583 hci_run(); 5584 } 5585 5586 #endif 5587 5588 void hci_le_set_own_address_type(uint8_t own_address_type){ 5589 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5590 if (own_address_type == hci_stack->le_own_addr_type) return; 5591 hci_stack->le_own_addr_type = own_address_type; 5592 5593 #ifdef ENABLE_LE_PERIPHERAL 5594 // update advertisement parameters, too 5595 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5596 hci_run(); 5597 #endif 5598 #ifdef ENABLE_LE_CENTRAL 5599 // note: we don't update scan parameters or modify ongoing connection attempts 5600 #endif 5601 } 5602 5603 #endif 5604 5605 uint8_t gap_disconnect(hci_con_handle_t handle){ 5606 hci_connection_t * conn = hci_connection_for_handle(handle); 5607 if (!conn){ 5608 hci_emit_disconnection_complete(handle, 0); 5609 return 0; 5610 } 5611 // ignore if already disconnected 5612 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5613 return 0; 5614 } 5615 conn->state = SEND_DISCONNECT; 5616 hci_run(); 5617 return 0; 5618 } 5619 5620 int gap_read_rssi(hci_con_handle_t con_handle){ 5621 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5622 if (hci_connection == NULL) return 0; 5623 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5624 hci_run(); 5625 return 1; 5626 } 5627 5628 /** 5629 * @brief Get connection type 5630 * @param con_handle 5631 * @result connection_type 5632 */ 5633 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5634 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5635 if (!conn) return GAP_CONNECTION_INVALID; 5636 switch (conn->address_type){ 5637 case BD_ADDR_TYPE_LE_PUBLIC: 5638 case BD_ADDR_TYPE_LE_RANDOM: 5639 return GAP_CONNECTION_LE; 5640 case BD_ADDR_TYPE_SCO: 5641 return GAP_CONNECTION_SCO; 5642 case BD_ADDR_TYPE_ACL: 5643 return GAP_CONNECTION_ACL; 5644 default: 5645 return GAP_CONNECTION_INVALID; 5646 } 5647 } 5648 5649 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5650 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5651 if (!conn) return HCI_ROLE_INVALID; 5652 return (hci_role_t) conn->role; 5653 } 5654 5655 5656 #ifdef ENABLE_CLASSIC 5657 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5658 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5659 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5660 conn->request_role = role; 5661 hci_run(); 5662 return ERROR_CODE_SUCCESS; 5663 } 5664 #endif 5665 5666 #ifdef ENABLE_BLE 5667 5668 uint8_t gap_le_set_phy(hci_con_handle_t connection_handle, uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint8_t phy_options){ 5669 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5670 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5671 5672 conn->le_phy_update_all_phys = all_phys; 5673 conn->le_phy_update_tx_phys = tx_phys; 5674 conn->le_phy_update_rx_phys = rx_phys; 5675 conn->le_phy_update_phy_options = phy_options; 5676 5677 hci_run(); 5678 5679 return 0; 5680 } 5681 5682 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5683 // check if already in list 5684 btstack_linked_list_iterator_t it; 5685 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5686 while (btstack_linked_list_iterator_has_next(&it)) { 5687 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5688 if (entry->address_type != address_type) { 5689 continue; 5690 } 5691 if (memcmp(entry->address, address, 6) != 0) { 5692 continue; 5693 } 5694 // disallow if already scheduled to add 5695 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5696 return ERROR_CODE_COMMAND_DISALLOWED; 5697 } 5698 // still on controller, but scheduled to remove -> re-add 5699 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5700 return ERROR_CODE_SUCCESS; 5701 } 5702 // alloc and add to list 5703 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5704 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5705 entry->address_type = address_type; 5706 (void)memcpy(entry->address, address, 6); 5707 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5708 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5709 return ERROR_CODE_SUCCESS; 5710 } 5711 5712 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5713 btstack_linked_list_iterator_t it; 5714 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5715 while (btstack_linked_list_iterator_has_next(&it)){ 5716 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5717 if (entry->address_type != address_type) { 5718 continue; 5719 } 5720 if (memcmp(entry->address, address, 6) != 0) { 5721 continue; 5722 } 5723 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5724 // remove from controller if already present 5725 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5726 } else { 5727 // directly remove entry from whitelist 5728 btstack_linked_list_iterator_remove(&it); 5729 btstack_memory_whitelist_entry_free(entry); 5730 } 5731 return ERROR_CODE_SUCCESS; 5732 } 5733 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5734 } 5735 5736 static void hci_whitelist_clear(void){ 5737 btstack_linked_list_iterator_t it; 5738 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5739 while (btstack_linked_list_iterator_has_next(&it)){ 5740 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5741 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5742 // remove from controller if already present 5743 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5744 continue; 5745 } 5746 // directly remove entry from whitelist 5747 btstack_linked_list_iterator_remove(&it); 5748 btstack_memory_whitelist_entry_free(entry); 5749 } 5750 } 5751 5752 /** 5753 * @brief Clear Whitelist 5754 * @returns 0 if ok 5755 */ 5756 uint8_t gap_whitelist_clear(void){ 5757 hci_whitelist_clear(); 5758 hci_run(); 5759 return ERROR_CODE_SUCCESS; 5760 } 5761 5762 /** 5763 * @brief Add Device to Whitelist 5764 * @param address_typ 5765 * @param address 5766 * @returns 0 if ok 5767 */ 5768 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5769 uint8_t status = hci_whitelist_add(address_type, address); 5770 if (status){ 5771 return status; 5772 } 5773 hci_run(); 5774 return ERROR_CODE_SUCCESS; 5775 } 5776 5777 /** 5778 * @brief Remove Device from Whitelist 5779 * @param address_typ 5780 * @param address 5781 * @returns 0 if ok 5782 */ 5783 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5784 uint8_t status = hci_whitelist_remove(address_type, address); 5785 if (status){ 5786 return status; 5787 } 5788 hci_run(); 5789 return ERROR_CODE_SUCCESS; 5790 } 5791 5792 #ifdef ENABLE_LE_CENTRAL 5793 /** 5794 * @brief Connect with Whitelist 5795 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5796 * @returns - if ok 5797 */ 5798 uint8_t gap_connect_with_whitelist(void){ 5799 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5800 return ERROR_CODE_COMMAND_DISALLOWED; 5801 } 5802 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5803 hci_run(); 5804 return ERROR_CODE_SUCCESS; 5805 } 5806 5807 /** 5808 * @brief Auto Connection Establishment - Start Connecting to device 5809 * @param address_typ 5810 * @param address 5811 * @returns 0 if ok 5812 */ 5813 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5814 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5815 return ERROR_CODE_COMMAND_DISALLOWED; 5816 } 5817 5818 uint8_t status = hci_whitelist_add(address_type, address); 5819 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5820 return status; 5821 } 5822 5823 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5824 5825 hci_run(); 5826 return ERROR_CODE_SUCCESS; 5827 } 5828 5829 /** 5830 * @brief Auto Connection Establishment - Stop Connecting to device 5831 * @param address_typ 5832 * @param address 5833 * @returns 0 if ok 5834 */ 5835 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5836 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5837 return ERROR_CODE_COMMAND_DISALLOWED; 5838 } 5839 5840 hci_whitelist_remove(address_type, address); 5841 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5842 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5843 } 5844 hci_run(); 5845 return 0; 5846 } 5847 5848 /** 5849 * @brief Auto Connection Establishment - Stop everything 5850 * @note Convenience function to stop all active auto connection attempts 5851 */ 5852 uint8_t gap_auto_connection_stop_all(void){ 5853 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5854 return ERROR_CODE_COMMAND_DISALLOWED; 5855 } 5856 hci_whitelist_clear(); 5857 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5858 hci_run(); 5859 return ERROR_CODE_SUCCESS; 5860 } 5861 5862 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5863 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5864 if (!conn) return 0; 5865 return conn->le_connection_interval; 5866 } 5867 #endif 5868 #endif 5869 5870 #ifdef ENABLE_CLASSIC 5871 /** 5872 * @brief Set Extended Inquiry Response data 5873 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5874 * @note has to be done before stack starts up 5875 */ 5876 void gap_set_extended_inquiry_response(const uint8_t * data){ 5877 hci_stack->eir_data = data; 5878 } 5879 5880 /** 5881 * @brief Start GAP Classic Inquiry 5882 * @param duration in 1.28s units 5883 * @return 0 if ok 5884 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5885 */ 5886 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5887 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5888 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5889 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5890 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5891 } 5892 hci_stack->inquiry_state = duration_in_1280ms_units; 5893 hci_run(); 5894 return 0; 5895 } 5896 5897 /** 5898 * @brief Stop GAP Classic Inquiry 5899 * @returns 0 if ok 5900 */ 5901 int gap_inquiry_stop(void){ 5902 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5903 // emit inquiry complete event, before it even started 5904 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5905 hci_emit_event(event, sizeof(event), 1); 5906 return 0; 5907 } 5908 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5909 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5910 hci_run(); 5911 return 0; 5912 } 5913 5914 5915 /** 5916 * @brief Remote Name Request 5917 * @param addr 5918 * @param page_scan_repetition_mode 5919 * @param clock_offset only used when bit 15 is set 5920 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5921 */ 5922 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5923 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5924 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5925 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5926 hci_stack->remote_name_clock_offset = clock_offset; 5927 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5928 hci_run(); 5929 return 0; 5930 } 5931 5932 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 5933 hci_stack->gap_pairing_state = state; 5934 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5935 hci_run(); 5936 return 0; 5937 } 5938 5939 /** 5940 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5941 * @param addr 5942 * @param pin_data 5943 * @param pin_len 5944 * @return 0 if ok 5945 */ 5946 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5947 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5948 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5949 hci_stack->gap_pairing_pin_len = pin_len; 5950 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5951 } 5952 5953 /** 5954 * @brief Legacy Pairing Pin Code Response 5955 * @param addr 5956 * @param pin 5957 * @return 0 if ok 5958 */ 5959 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 5960 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5961 } 5962 5963 /** 5964 * @brief Abort Legacy Pairing 5965 * @param addr 5966 * @param pin 5967 * @return 0 if ok 5968 */ 5969 int gap_pin_code_negative(bd_addr_t addr){ 5970 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5971 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5972 } 5973 5974 /** 5975 * @brief SSP Passkey Response 5976 * @param addr 5977 * @param passkey 5978 * @return 0 if ok 5979 */ 5980 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 5981 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5982 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5983 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5984 } 5985 5986 /** 5987 * @brief Abort SSP Passkey Entry/Pairing 5988 * @param addr 5989 * @param pin 5990 * @return 0 if ok 5991 */ 5992 int gap_ssp_passkey_negative(const bd_addr_t addr){ 5993 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5994 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5995 } 5996 5997 /** 5998 * @brief Accept SSP Numeric Comparison 5999 * @param addr 6000 * @param passkey 6001 * @return 0 if ok 6002 */ 6003 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6004 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6005 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6006 } 6007 6008 /** 6009 * @brief Abort SSP Numeric Comparison/Pairing 6010 * @param addr 6011 * @param pin 6012 * @return 0 if ok 6013 */ 6014 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6015 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6016 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6017 } 6018 6019 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6020 6021 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6022 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6023 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6024 connectionSetAuthenticationFlags(conn, flag); 6025 hci_run(); 6026 return ERROR_CODE_SUCCESS; 6027 } 6028 6029 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6030 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6031 } 6032 6033 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6034 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6035 } 6036 #endif 6037 6038 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6039 /** 6040 * @brief Report Remote OOB Data 6041 * @param bd_addr 6042 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6043 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6044 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6045 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6046 */ 6047 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){ 6048 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6049 if (connection == NULL) { 6050 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6051 } 6052 connection->classic_oob_c_192 = c_192; 6053 connection->classic_oob_r_192 = r_192; 6054 connection->classic_oob_c_256 = c_256; 6055 connection->classic_oob_r_256 = r_256; 6056 return ERROR_CODE_SUCCESS; 6057 } 6058 /** 6059 * @brief Generate new OOB data 6060 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6061 */ 6062 void gap_ssp_generate_oob_data(void){ 6063 hci_stack->classic_read_local_oob_data = true; 6064 hci_run(); 6065 } 6066 6067 #endif 6068 6069 /** 6070 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6071 * @param inquiry_mode see bluetooth_defines.h 6072 */ 6073 void hci_set_inquiry_mode(inquiry_mode_t mode){ 6074 hci_stack->inquiry_mode = mode; 6075 } 6076 6077 /** 6078 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6079 */ 6080 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6081 hci_stack->sco_voice_setting = voice_setting; 6082 } 6083 6084 /** 6085 * @brief Get SCO Voice Setting 6086 * @return current voice setting 6087 */ 6088 uint16_t hci_get_sco_voice_setting(void){ 6089 return hci_stack->sco_voice_setting; 6090 } 6091 6092 static int hci_have_usb_transport(void){ 6093 if (!hci_stack->hci_transport) return 0; 6094 const char * transport_name = hci_stack->hci_transport->name; 6095 if (!transport_name) return 0; 6096 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6097 } 6098 6099 /** @brief Get SCO packet length for current SCO Voice setting 6100 * @note Using SCO packets of the exact length is required for USB transfer 6101 * @return Length of SCO packets in bytes (not audio frames) 6102 */ 6103 int hci_get_sco_packet_length(void){ 6104 int sco_packet_length = 0; 6105 6106 #ifdef ENABLE_SCO_OVER_HCI 6107 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6108 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6109 6110 if (hci_have_usb_transport()){ 6111 // see Core Spec for H2 USB Transfer. 6112 // 3 byte SCO header + 24 bytes per connection 6113 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6114 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6115 } else { 6116 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6117 sco_packet_length = 3 + 60 * multiplier; 6118 // assert that it still fits inside an SCO buffer 6119 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6120 sco_packet_length = 3 + 60; 6121 } 6122 } 6123 #endif 6124 6125 #ifdef HAVE_SCO_TRANSPORT 6126 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6127 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6128 sco_packet_length = 3 + 60 * multiplier; 6129 #endif 6130 return sco_packet_length; 6131 } 6132 6133 /** 6134 * @brief Sets the master/slave policy 6135 * @param policy (0: attempt to become master, 1: let connecting device decide) 6136 */ 6137 void hci_set_master_slave_policy(uint8_t policy){ 6138 hci_stack->master_slave_policy = policy; 6139 } 6140 6141 #endif 6142 6143 HCI_STATE hci_get_state(void){ 6144 return hci_stack->state; 6145 } 6146 6147 #ifdef ENABLE_CLASSIC 6148 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6149 hci_stack->gap_classic_accept_callback = accept_callback; 6150 } 6151 #endif 6152 6153 /** 6154 * @brief Set callback for Bluetooth Hardware Error 6155 */ 6156 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6157 hci_stack->hardware_error_callback = fn; 6158 } 6159 6160 void hci_disconnect_all(void){ 6161 btstack_linked_list_iterator_t it; 6162 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6163 while (btstack_linked_list_iterator_has_next(&it)){ 6164 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6165 if (con->state == SENT_DISCONNECT) continue; 6166 con->state = SEND_DISCONNECT; 6167 } 6168 hci_run(); 6169 } 6170 6171 uint16_t hci_get_manufacturer(void){ 6172 return hci_stack->manufacturer; 6173 } 6174 6175 #ifdef ENABLE_BLE 6176 6177 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6178 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6179 if (!hci_con) return NULL; 6180 return &hci_con->sm_connection; 6181 } 6182 6183 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6184 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6185 6186 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6187 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6188 if (hci_connection == NULL) return 0; 6189 if (hci_is_le_connection(hci_connection)){ 6190 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6191 if (sm_conn->sm_connection_encrypted) { 6192 return sm_conn->sm_actual_encryption_key_size; 6193 } 6194 } 6195 #ifdef ENABLE_CLASSIC 6196 else { 6197 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 6198 return hci_connection->encryption_key_size; 6199 } 6200 } 6201 #endif 6202 return 0; 6203 } 6204 6205 int gap_authenticated(hci_con_handle_t con_handle){ 6206 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6207 if (hci_connection == NULL) return 0; 6208 6209 switch (hci_connection->address_type){ 6210 case BD_ADDR_TYPE_LE_PUBLIC: 6211 case BD_ADDR_TYPE_LE_RANDOM: 6212 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6213 return hci_connection->sm_connection.sm_connection_authenticated; 6214 #ifdef ENABLE_CLASSIC 6215 case BD_ADDR_TYPE_SCO: 6216 case BD_ADDR_TYPE_ACL: 6217 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6218 #endif 6219 default: 6220 return 0; 6221 } 6222 } 6223 6224 int gap_secure_connection(hci_con_handle_t con_handle){ 6225 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6226 if (hci_connection == NULL) return 0; 6227 6228 switch (hci_connection->address_type){ 6229 case BD_ADDR_TYPE_LE_PUBLIC: 6230 case BD_ADDR_TYPE_LE_RANDOM: 6231 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6232 return hci_connection->sm_connection.sm_connection_sc; 6233 #ifdef ENABLE_CLASSIC 6234 case BD_ADDR_TYPE_SCO: 6235 case BD_ADDR_TYPE_ACL: 6236 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6237 #endif 6238 default: 6239 return 0; 6240 } 6241 } 6242 6243 bool gap_bonded(hci_con_handle_t con_handle){ 6244 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6245 if (hci_connection == NULL) return 0; 6246 6247 #ifdef ENABLE_CLASSIC 6248 link_key_t link_key; 6249 link_key_type_t link_key_type; 6250 #endif 6251 switch (hci_connection->address_type){ 6252 case BD_ADDR_TYPE_LE_PUBLIC: 6253 case BD_ADDR_TYPE_LE_RANDOM: 6254 return hci_connection->sm_connection.sm_le_db_index >= 0; 6255 #ifdef ENABLE_CLASSIC 6256 case BD_ADDR_TYPE_SCO: 6257 case BD_ADDR_TYPE_ACL: 6258 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6259 #endif 6260 default: 6261 return false; 6262 } 6263 } 6264 6265 6266 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6267 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6268 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6269 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6270 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6271 return sm_conn->sm_connection_authorization_state; 6272 } 6273 #endif 6274 6275 #ifdef ENABLE_CLASSIC 6276 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){ 6277 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6278 if (!conn) return GAP_CONNECTION_INVALID; 6279 conn->sniff_min_interval = sniff_min_interval; 6280 conn->sniff_max_interval = sniff_max_interval; 6281 conn->sniff_attempt = sniff_attempt; 6282 conn->sniff_timeout = sniff_timeout; 6283 hci_run(); 6284 return 0; 6285 } 6286 6287 /** 6288 * @brief Exit Sniff mode 6289 * @param con_handle 6290 @ @return 0 if ok 6291 */ 6292 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6293 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6294 if (!conn) return GAP_CONNECTION_INVALID; 6295 conn->sniff_min_interval = 0xffff; 6296 hci_run(); 6297 return 0; 6298 } 6299 #endif 6300 6301 void hci_halting_defer(void){ 6302 if (hci_stack->state != HCI_STATE_HALTING) return; 6303 switch (hci_stack->substate){ 6304 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6305 case HCI_HALTING_CLOSE: 6306 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6307 break; 6308 default: 6309 break; 6310 } 6311 } 6312 6313 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6314 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6315 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6316 if (le_device_db_index >= le_device_db_max_count()) return; 6317 uint8_t offset = le_device_db_index >> 3; 6318 uint8_t mask = 1 << (le_device_db_index & 7); 6319 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6320 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6321 // note: go back to remove entries, otherwise, a remove + add will skip the add 6322 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6323 } 6324 } 6325 6326 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6327 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6328 if (le_device_db_index >= le_device_db_max_count()) return; 6329 uint8_t offset = le_device_db_index >> 3; 6330 uint8_t mask = 1 << (le_device_db_index & 7); 6331 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6332 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6333 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6334 } 6335 } 6336 6337 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6338 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6339 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6340 } 6341 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6342 // restart le resolving list update 6343 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6344 } 6345 return ERROR_CODE_SUCCESS; 6346 } 6347 #endif 6348 6349 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6350 void hci_setup_test_connections_fuzz(void){ 6351 hci_connection_t * conn; 6352 6353 // default address: 66:55:44:33:00:01 6354 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6355 6356 // setup Controller info 6357 hci_stack->num_cmd_packets = 255; 6358 hci_stack->acl_packets_total_num = 255; 6359 6360 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6361 addr[5] = 0x01; 6362 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6363 conn->con_handle = addr[5]; 6364 conn->role = HCI_ROLE_SLAVE; 6365 conn->state = RECEIVED_CONNECTION_REQUEST; 6366 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6367 6368 // setup incoming Classic SCO connection with con handle 0x0002 6369 addr[5] = 0x02; 6370 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6371 conn->con_handle = addr[5]; 6372 conn->role = HCI_ROLE_SLAVE; 6373 conn->state = RECEIVED_CONNECTION_REQUEST; 6374 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6375 6376 // setup ready Classic ACL connection with con handle 0x0003 6377 addr[5] = 0x03; 6378 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6379 conn->con_handle = addr[5]; 6380 conn->role = HCI_ROLE_SLAVE; 6381 conn->state = OPEN; 6382 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6383 6384 // setup ready Classic SCO connection with con handle 0x0004 6385 addr[5] = 0x04; 6386 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6387 conn->con_handle = addr[5]; 6388 conn->role = HCI_ROLE_SLAVE; 6389 conn->state = OPEN; 6390 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6391 6392 // setup ready LE ACL connection with con handle 0x005 and public address 6393 addr[5] = 0x05; 6394 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6395 conn->con_handle = addr[5]; 6396 conn->role = HCI_ROLE_SLAVE; 6397 conn->state = OPEN; 6398 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6399 conn->sm_connection.sm_connection_encrypted = 1; 6400 } 6401 6402 void hci_free_connections_fuzz(void){ 6403 btstack_linked_list_iterator_t it; 6404 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6405 while (btstack_linked_list_iterator_has_next(&it)){ 6406 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6407 btstack_linked_list_iterator_remove(&it); 6408 btstack_memory_hci_connection_free(con); 6409 } 6410 } 6411 void hci_simulate_working_fuzz(void){ 6412 hci_init_done(); 6413 hci_stack->num_cmd_packets = 255; 6414 } 6415 #endif 6416