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 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 98 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 99 #define HCI_RESET_RESEND_TIMEOUT_MS 200 100 #endif 101 102 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 103 #ifndef GAP_INQUIRY_MAX_NAME_LEN 104 #define GAP_INQUIRY_MAX_NAME_LEN 32 105 #endif 106 107 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 108 #define GAP_INQUIRY_DURATION_MIN 0x01 109 #define GAP_INQUIRY_DURATION_MAX 0x30 110 #define GAP_INQUIRY_STATE_ACTIVE 0x80 111 #define GAP_INQUIRY_STATE_IDLE 0 112 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 113 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 114 115 // GAP Remote Name Request 116 #define GAP_REMOTE_NAME_STATE_IDLE 0 117 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 118 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 119 120 // GAP Pairing 121 #define GAP_PAIRING_STATE_IDLE 0 122 #define GAP_PAIRING_STATE_SEND_PIN 1 123 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 124 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 125 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 126 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 127 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 128 129 130 // prototypes 131 #ifdef ENABLE_CLASSIC 132 static void hci_update_scan_enable(void); 133 static void hci_emit_discoverable_enabled(uint8_t enabled); 134 static int hci_local_ssp_activated(void); 135 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 136 static bool hci_ssp_supported(hci_connection_t * connection); 137 static void hci_notify_if_sco_can_send_now(void); 138 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 139 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 140 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 141 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 142 static void hci_connection_timestamp(hci_connection_t *connection); 143 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 144 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 145 #endif 146 147 static int hci_power_control_on(void); 148 static void hci_power_control_off(void); 149 static void hci_state_reset(void); 150 static void hci_emit_transport_packet_sent(void); 151 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 152 static void hci_emit_nr_connections_changed(void); 153 static void hci_emit_hci_open_failed(void); 154 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 155 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 156 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 157 static void hci_run(void); 158 static int hci_is_le_connection(hci_connection_t * connection); 159 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 160 161 #ifdef ENABLE_CLASSIC 162 static int hci_have_usb_transport(void); 163 #endif 164 165 #ifdef ENABLE_BLE 166 #ifdef ENABLE_LE_CENTRAL 167 // called from test/ble_client/advertising_data_parser.c 168 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 169 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 170 static hci_connection_t * gap_get_outgoing_connection(void); 171 #endif 172 #endif 173 174 // the STACK is here 175 #ifndef HAVE_MALLOC 176 static hci_stack_t hci_stack_static; 177 #endif 178 static hci_stack_t * hci_stack = NULL; 179 180 #ifdef ENABLE_CLASSIC 181 // default name 182 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 183 184 // test helper 185 static uint8_t disable_l2cap_timeouts = 0; 186 #endif 187 188 /** 189 * create connection for given address 190 * 191 * @return connection OR NULL, if no memory left 192 */ 193 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 194 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 195 hci_connection_t * conn = btstack_memory_hci_connection_get(); 196 if (!conn) return NULL; 197 bd_addr_copy(conn->address, addr); 198 conn->role = HCI_ROLE_INVALID; 199 conn->address_type = addr_type; 200 conn->con_handle = 0xffff; 201 conn->authentication_flags = AUTH_FLAGS_NONE; 202 conn->bonding_flags = 0; 203 conn->requested_security_level = LEVEL_0; 204 #ifdef ENABLE_CLASSIC 205 conn->request_role = HCI_ROLE_INVALID; 206 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 207 btstack_run_loop_set_timer_context(&conn->timeout, conn); 208 hci_connection_timestamp(conn); 209 #endif 210 conn->acl_recombination_length = 0; 211 conn->acl_recombination_pos = 0; 212 conn->num_packets_sent = 0; 213 214 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 215 #ifdef ENABLE_BLE 216 conn->le_phy_update_all_phys = 0xff; 217 #endif 218 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 219 conn->le_max_tx_octets = 27; 220 #endif 221 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 222 return conn; 223 } 224 225 226 /** 227 * get le connection parameter range 228 * 229 * @return le connection parameter range struct 230 */ 231 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 232 *range = hci_stack->le_connection_parameter_range; 233 } 234 235 /** 236 * set le connection parameter range 237 * 238 */ 239 240 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 241 hci_stack->le_connection_parameter_range = *range; 242 } 243 244 /** 245 * @brief Test if connection parameters are inside in existing rage 246 * @param conn_interval_min (unit: 1.25ms) 247 * @param conn_interval_max (unit: 1.25ms) 248 * @param conn_latency 249 * @param supervision_timeout (unit: 10ms) 250 * @returns 1 if included 251 */ 252 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){ 253 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 254 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 255 256 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 257 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 258 259 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 260 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 261 262 return 1; 263 } 264 265 /** 266 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 267 * @note: default: 1 268 * @param max_peripheral_connections 269 */ 270 #ifdef ENABLE_LE_PERIPHERAL 271 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 272 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 273 } 274 #endif 275 276 /** 277 * get hci connections iterator 278 * 279 * @return hci connections iterator 280 */ 281 282 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 283 btstack_linked_list_iterator_init(it, &hci_stack->connections); 284 } 285 286 /** 287 * get connection for a given handle 288 * 289 * @return connection OR NULL, if not found 290 */ 291 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 292 btstack_linked_list_iterator_t it; 293 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 294 while (btstack_linked_list_iterator_has_next(&it)){ 295 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 296 if ( item->con_handle == con_handle ) { 297 return item; 298 } 299 } 300 return NULL; 301 } 302 303 /** 304 * get connection for given address 305 * 306 * @return connection OR NULL, if not found 307 */ 308 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 309 btstack_linked_list_iterator_t it; 310 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 311 while (btstack_linked_list_iterator_has_next(&it)){ 312 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 313 if (connection->address_type != addr_type) continue; 314 if (memcmp(addr, connection->address, 6) != 0) continue; 315 return connection; 316 } 317 return NULL; 318 } 319 320 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 321 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 322 } 323 324 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 325 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 326 } 327 328 #ifdef ENABLE_CLASSIC 329 330 #ifdef ENABLE_SCO_OVER_HCI 331 static int hci_number_sco_connections(void){ 332 int connections = 0; 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 337 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 338 connections++; 339 } 340 return connections; 341 } 342 #endif 343 344 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 345 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 346 #ifdef HAVE_EMBEDDED_TICK 347 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 348 // connections might be timed out 349 hci_emit_l2cap_check_timeout(connection); 350 } 351 #else 352 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 353 // connections might be timed out 354 hci_emit_l2cap_check_timeout(connection); 355 } 356 #endif 357 } 358 359 static void hci_connection_timestamp(hci_connection_t *connection){ 360 #ifdef HAVE_EMBEDDED_TICK 361 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 362 #else 363 connection->timestamp = btstack_run_loop_get_time_ms(); 364 #endif 365 } 366 367 /** 368 * add authentication flags and reset timer 369 * @note: assumes classic connection 370 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 371 */ 372 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 373 bd_addr_t addr; 374 reverse_bd_addr(bd_addr, addr); 375 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 376 if (conn) { 377 connectionSetAuthenticationFlags(conn, flags); 378 hci_connection_timestamp(conn); 379 } 380 } 381 382 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 383 hci_connection_t * conn = hci_connection_for_handle(handle); 384 if (!conn) return 0; 385 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 386 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 387 return 0; 388 } 389 390 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 391 if (!hci_stack->link_key_db) return; 392 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 393 hci_stack->link_key_db->delete_link_key(addr); 394 } 395 396 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 397 if (!hci_stack->link_key_db) return; 398 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 399 hci_stack->link_key_db->put_link_key(addr, link_key, type); 400 } 401 402 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 403 if (!hci_stack->link_key_db) return false; 404 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 405 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 406 return result; 407 } 408 409 void gap_delete_all_link_keys(void){ 410 bd_addr_t addr; 411 link_key_t link_key; 412 link_key_type_t type; 413 btstack_link_key_iterator_t it; 414 int ok = gap_link_key_iterator_init(&it); 415 if (!ok) { 416 log_error("could not initialize iterator"); 417 return; 418 } 419 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 420 gap_drop_link_key_for_bd_addr(addr); 421 } 422 gap_link_key_iterator_done(&it); 423 } 424 425 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 426 if (!hci_stack->link_key_db) return 0; 427 if (!hci_stack->link_key_db->iterator_init) return 0; 428 return hci_stack->link_key_db->iterator_init(it); 429 } 430 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){ 431 if (!hci_stack->link_key_db) return 0; 432 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 433 } 434 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 435 if (!hci_stack->link_key_db) return; 436 hci_stack->link_key_db->iterator_done(it); 437 } 438 #endif 439 440 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 441 switch (address_type){ 442 case BD_ADDR_TYPE_LE_PUBLIC: 443 case BD_ADDR_TYPE_LE_RANDOM: 444 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 445 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 446 return true; 447 default: 448 return false; 449 } 450 } 451 452 static int hci_is_le_connection(hci_connection_t * connection){ 453 return hci_is_le_connection_type(connection->address_type); 454 } 455 456 /** 457 * count connections 458 */ 459 static int nr_hci_connections(void){ 460 int count = 0; 461 btstack_linked_item_t *it; 462 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 463 count++; 464 } 465 return count; 466 } 467 468 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 469 470 unsigned int num_packets_sent_classic = 0; 471 unsigned int num_packets_sent_le = 0; 472 473 btstack_linked_item_t *it; 474 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 475 hci_connection_t * connection = (hci_connection_t *) it; 476 if (hci_is_le_connection(connection)){ 477 num_packets_sent_le += connection->num_packets_sent; 478 } 479 if (connection->address_type == BD_ADDR_TYPE_ACL){ 480 num_packets_sent_classic += connection->num_packets_sent; 481 } 482 } 483 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 484 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 485 int free_slots_le = 0; 486 487 if (free_slots_classic < 0){ 488 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); 489 return 0; 490 } 491 492 if (hci_stack->le_acl_packets_total_num){ 493 // if we have LE slots, they are used 494 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 495 if (free_slots_le < 0){ 496 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); 497 return 0; 498 } 499 } else { 500 // otherwise, classic slots are used for LE, too 501 free_slots_classic -= num_packets_sent_le; 502 if (free_slots_classic < 0){ 503 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); 504 return 0; 505 } 506 } 507 508 switch (address_type){ 509 case BD_ADDR_TYPE_UNKNOWN: 510 log_error("hci_number_free_acl_slots: unknown address type"); 511 return 0; 512 513 case BD_ADDR_TYPE_ACL: 514 return free_slots_classic; 515 516 default: 517 if (hci_stack->le_acl_packets_total_num){ 518 return free_slots_le; 519 } 520 return free_slots_classic; 521 } 522 } 523 524 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 525 // get connection type 526 hci_connection_t * connection = hci_connection_for_handle(con_handle); 527 if (!connection){ 528 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 529 return 0; 530 } 531 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 532 } 533 534 #ifdef ENABLE_CLASSIC 535 static int hci_number_free_sco_slots(void){ 536 unsigned int num_sco_packets_sent = 0; 537 btstack_linked_item_t *it; 538 if (hci_stack->synchronous_flow_control_enabled){ 539 // explicit flow control 540 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 541 hci_connection_t * connection = (hci_connection_t *) it; 542 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 543 num_sco_packets_sent += connection->num_packets_sent; 544 } 545 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 546 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 547 return 0; 548 } 549 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 550 } else { 551 // implicit flow control -- TODO 552 int num_ready = 0; 553 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 554 hci_connection_t * connection = (hci_connection_t *) it; 555 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 556 if (connection->sco_tx_ready == 0) continue; 557 num_ready++; 558 } 559 return num_ready; 560 } 561 } 562 #endif 563 564 // only used to send HCI Host Number Completed Packets 565 static int hci_can_send_comand_packet_transport(void){ 566 if (hci_stack->hci_packet_buffer_reserved) return 0; 567 568 // check for async hci transport implementations 569 if (hci_stack->hci_transport->can_send_packet_now){ 570 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 571 return 0; 572 } 573 } 574 return 1; 575 } 576 577 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 578 int hci_can_send_command_packet_now(void){ 579 if (hci_can_send_comand_packet_transport() == 0) return 0; 580 return hci_stack->num_cmd_packets > 0u; 581 } 582 583 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 584 // check for async hci transport implementations 585 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 586 return hci_stack->hci_transport->can_send_packet_now(packet_type); 587 } 588 589 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 590 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 591 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 592 } 593 594 int hci_can_send_acl_le_packet_now(void){ 595 if (hci_stack->hci_packet_buffer_reserved) return 0; 596 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 597 } 598 599 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 600 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 601 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 602 } 603 604 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 605 if (hci_stack->hci_packet_buffer_reserved) return 0; 606 return hci_can_send_prepared_acl_packet_now(con_handle); 607 } 608 609 #ifdef ENABLE_CLASSIC 610 int hci_can_send_acl_classic_packet_now(void){ 611 if (hci_stack->hci_packet_buffer_reserved) return 0; 612 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 613 } 614 615 int hci_can_send_prepared_sco_packet_now(void){ 616 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 617 if (hci_have_usb_transport()){ 618 return hci_stack->sco_can_send_now; 619 } else { 620 return hci_number_free_sco_slots() > 0; 621 } 622 } 623 624 int hci_can_send_sco_packet_now(void){ 625 if (hci_stack->hci_packet_buffer_reserved) return 0; 626 return hci_can_send_prepared_sco_packet_now(); 627 } 628 629 void hci_request_sco_can_send_now_event(void){ 630 hci_stack->sco_waiting_for_can_send_now = 1; 631 hci_notify_if_sco_can_send_now(); 632 } 633 #endif 634 635 // used for internal checks in l2cap.c 636 int hci_is_packet_buffer_reserved(void){ 637 return hci_stack->hci_packet_buffer_reserved; 638 } 639 640 // reserves outgoing packet buffer. @returns 1 if successful 641 int hci_reserve_packet_buffer(void){ 642 if (hci_stack->hci_packet_buffer_reserved) { 643 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 644 return 0; 645 } 646 hci_stack->hci_packet_buffer_reserved = 1; 647 return 1; 648 } 649 650 void hci_release_packet_buffer(void){ 651 hci_stack->hci_packet_buffer_reserved = 0; 652 } 653 654 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 655 static int hci_transport_synchronous(void){ 656 return hci_stack->hci_transport->can_send_packet_now == NULL; 657 } 658 659 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 660 661 // 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); 662 663 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 664 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 665 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 666 max_acl_data_packet_length = hci_stack->le_data_packets_length; 667 } 668 669 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 670 if (hci_is_le_connection(connection)){ 671 max_acl_data_packet_length = connection->le_max_tx_octets; 672 } 673 #endif 674 675 log_debug("hci_send_acl_packet_fragments entered"); 676 677 int err; 678 // multiple packets could be send on a synchronous HCI transport 679 while (true){ 680 681 log_debug("hci_send_acl_packet_fragments loop entered"); 682 683 // get current data 684 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 685 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 686 int more_fragments = 0; 687 688 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 689 if (current_acl_data_packet_length > max_acl_data_packet_length){ 690 more_fragments = 1; 691 current_acl_data_packet_length = max_acl_data_packet_length; 692 } 693 694 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 695 if (acl_header_pos > 0u){ 696 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 697 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 698 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 699 } 700 701 // update header len 702 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 703 704 // count packet 705 connection->num_packets_sent++; 706 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 707 708 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 709 if (more_fragments){ 710 // update start of next fragment to send 711 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 712 } else { 713 // done 714 hci_stack->acl_fragmentation_pos = 0; 715 hci_stack->acl_fragmentation_total_size = 0; 716 } 717 718 // send packet 719 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 720 const int size = current_acl_data_packet_length + 4; 721 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 722 hci_stack->acl_fragmentation_tx_active = 1; 723 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 724 725 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 726 727 // done yet? 728 if (!more_fragments) break; 729 730 // can send more? 731 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 732 } 733 734 log_debug("hci_send_acl_packet_fragments loop over"); 735 736 // release buffer now for synchronous transport 737 if (hci_transport_synchronous()){ 738 hci_stack->acl_fragmentation_tx_active = 0; 739 hci_release_packet_buffer(); 740 hci_emit_transport_packet_sent(); 741 } 742 743 return err; 744 } 745 746 // pre: caller has reserved the packet buffer 747 int hci_send_acl_packet_buffer(int size){ 748 749 // log_info("hci_send_acl_packet_buffer size %u", size); 750 751 if (!hci_stack->hci_packet_buffer_reserved) { 752 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 753 return 0; 754 } 755 756 uint8_t * packet = hci_stack->hci_packet_buffer; 757 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 758 759 // check for free places on Bluetooth module 760 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 761 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 762 hci_release_packet_buffer(); 763 hci_emit_transport_packet_sent(); 764 return BTSTACK_ACL_BUFFERS_FULL; 765 } 766 767 hci_connection_t *connection = hci_connection_for_handle( con_handle); 768 if (!connection) { 769 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 770 hci_release_packet_buffer(); 771 hci_emit_transport_packet_sent(); 772 return 0; 773 } 774 775 #ifdef ENABLE_CLASSIC 776 hci_connection_timestamp(connection); 777 #endif 778 779 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 780 781 // setup data 782 hci_stack->acl_fragmentation_total_size = size; 783 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 784 785 return hci_send_acl_packet_fragments(connection); 786 } 787 788 #ifdef ENABLE_CLASSIC 789 // pre: caller has reserved the packet buffer 790 int hci_send_sco_packet_buffer(int size){ 791 792 // log_info("hci_send_acl_packet_buffer size %u", size); 793 794 if (!hci_stack->hci_packet_buffer_reserved) { 795 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 796 return 0; 797 } 798 799 uint8_t * packet = hci_stack->hci_packet_buffer; 800 801 // skip checks in loopback mode 802 if (!hci_stack->loopback_mode){ 803 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 804 805 // check for free places on Bluetooth module 806 if (!hci_can_send_prepared_sco_packet_now()) { 807 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 808 hci_release_packet_buffer(); 809 hci_emit_transport_packet_sent(); 810 return BTSTACK_ACL_BUFFERS_FULL; 811 } 812 813 // track send packet in connection struct 814 hci_connection_t *connection = hci_connection_for_handle( con_handle); 815 if (!connection) { 816 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 return 0; 820 } 821 822 if (hci_have_usb_transport()){ 823 // token used 824 hci_stack->sco_can_send_now = 0; 825 } else { 826 if (hci_stack->synchronous_flow_control_enabled){ 827 connection->num_packets_sent++; 828 } else { 829 connection->sco_tx_ready--; 830 } 831 } 832 } 833 834 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 835 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 836 837 if (hci_transport_synchronous()){ 838 hci_release_packet_buffer(); 839 hci_emit_transport_packet_sent(); 840 } 841 842 return err; 843 } 844 #endif 845 846 static void acl_handler(uint8_t *packet, uint16_t size){ 847 848 // get info 849 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 850 hci_connection_t *conn = hci_connection_for_handle(con_handle); 851 uint8_t acl_flags = READ_ACL_FLAGS(packet); 852 uint16_t acl_length = READ_ACL_LENGTH(packet); 853 854 // ignore non-registered handle 855 if (!conn){ 856 log_error("acl_handler called with non-registered handle %u!" , con_handle); 857 return; 858 } 859 860 // assert packet is complete 861 if ((acl_length + 4u) != size){ 862 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 863 return; 864 } 865 866 #ifdef ENABLE_CLASSIC 867 // update idle timestamp 868 hci_connection_timestamp(conn); 869 #endif 870 871 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 872 hci_stack->host_completed_packets = 1; 873 conn->num_packets_completed++; 874 #endif 875 876 // handle different packet types 877 switch (acl_flags & 0x03u) { 878 879 case 0x01: // continuation fragment 880 881 // sanity checks 882 if (conn->acl_recombination_pos == 0u) { 883 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 884 return; 885 } 886 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 887 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 888 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 889 conn->acl_recombination_pos = 0; 890 return; 891 } 892 893 // append fragment payload (header already stored) 894 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 895 &packet[4], acl_length); 896 conn->acl_recombination_pos += acl_length; 897 898 // forward complete L2CAP packet if complete. 899 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 900 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 901 // reset recombination buffer 902 conn->acl_recombination_length = 0; 903 conn->acl_recombination_pos = 0; 904 } 905 break; 906 907 case 0x02: { // first fragment 908 909 // sanity check 910 if (conn->acl_recombination_pos) { 911 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 912 conn->acl_recombination_pos = 0; 913 } 914 915 // peek into L2CAP packet! 916 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 917 918 // compare fragment size to L2CAP packet size 919 if (acl_length >= (l2cap_length + 4u)){ 920 // forward fragment as L2CAP packet 921 hci_emit_acl_packet(packet, acl_length + 4u); 922 } else { 923 924 if (acl_length > HCI_ACL_BUFFER_SIZE){ 925 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 926 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 927 return; 928 } 929 930 // store first fragment and tweak acl length for complete package 931 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 932 packet, acl_length + 4u); 933 conn->acl_recombination_pos = acl_length + 4u; 934 conn->acl_recombination_length = l2cap_length; 935 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 936 } 937 break; 938 939 } 940 default: 941 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 942 return; 943 } 944 945 // execute main loop 946 hci_run(); 947 } 948 949 static void hci_shutdown_connection(hci_connection_t *conn){ 950 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 951 952 #ifdef ENABLE_CLASSIC 953 #ifdef ENABLE_SCO_OVER_HCI 954 int addr_type = conn->address_type; 955 #endif 956 #endif 957 958 btstack_run_loop_remove_timer(&conn->timeout); 959 960 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 961 btstack_memory_hci_connection_free( conn ); 962 963 // now it's gone 964 hci_emit_nr_connections_changed(); 965 966 #ifdef ENABLE_CLASSIC 967 #ifdef ENABLE_SCO_OVER_HCI 968 // update SCO 969 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 970 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 971 } 972 #endif 973 #endif 974 } 975 976 #ifdef ENABLE_CLASSIC 977 978 static const uint16_t packet_type_sizes[] = { 979 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 980 HCI_ACL_DH1_SIZE, 0, 0, 0, 981 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 982 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 983 }; 984 static const uint8_t packet_type_feature_requirement_bit[] = { 985 0, // 3 slot packets 986 1, // 5 slot packets 987 25, // EDR 2 mpbs 988 26, // EDR 3 mbps 989 39, // 3 slot EDR packts 990 40, // 5 slot EDR packet 991 }; 992 static const uint16_t packet_type_feature_packet_mask[] = { 993 0x0f00, // 3 slot packets 994 0xf000, // 5 slot packets 995 0x1102, // EDR 2 mpbs 996 0x2204, // EDR 3 mbps 997 0x0300, // 3 slot EDR packts 998 0x3000, // 5 slot EDR packet 999 }; 1000 1001 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1002 // enable packet types based on size 1003 uint16_t packet_types = 0; 1004 unsigned int i; 1005 for (i=0;i<16;i++){ 1006 if (packet_type_sizes[i] == 0) continue; 1007 if (packet_type_sizes[i] <= buffer_size){ 1008 packet_types |= 1 << i; 1009 } 1010 } 1011 // disable packet types due to missing local supported features 1012 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1013 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1014 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1015 if (feature_set) continue; 1016 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1017 packet_types &= ~packet_type_feature_packet_mask[i]; 1018 } 1019 // flip bits for "may not be used" 1020 packet_types ^= 0x3306; 1021 return packet_types; 1022 } 1023 1024 uint16_t hci_usable_acl_packet_types(void){ 1025 return hci_stack->packet_types; 1026 } 1027 #endif 1028 1029 uint8_t* hci_get_outgoing_packet_buffer(void){ 1030 // hci packet buffer is >= acl data packet length 1031 return hci_stack->hci_packet_buffer; 1032 } 1033 1034 uint16_t hci_max_acl_data_packet_length(void){ 1035 return hci_stack->acl_data_packet_length; 1036 } 1037 1038 #ifdef ENABLE_CLASSIC 1039 int hci_extended_sco_link_supported(void){ 1040 // No. 31, byte 3, bit 7 1041 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1042 } 1043 #endif 1044 1045 int hci_non_flushable_packet_boundary_flag_supported(void){ 1046 // No. 54, byte 6, bit 6 1047 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1048 } 1049 1050 static int gap_ssp_supported(void){ 1051 // No. 51, byte 6, bit 3 1052 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1053 } 1054 1055 static int hci_classic_supported(void){ 1056 #ifdef ENABLE_CLASSIC 1057 // No. 37, byte 4, bit 5, = No BR/EDR Support 1058 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1059 #else 1060 return 0; 1061 #endif 1062 } 1063 1064 static int hci_le_supported(void){ 1065 #ifdef ENABLE_BLE 1066 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1067 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1068 #else 1069 return 0; 1070 #endif 1071 } 1072 1073 #ifdef ENABLE_BLE 1074 1075 /** 1076 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1077 */ 1078 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1079 *addr_type = hci_stack->le_own_addr_type; 1080 if (hci_stack->le_own_addr_type){ 1081 (void)memcpy(addr, hci_stack->le_random_address, 6); 1082 } else { 1083 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1084 } 1085 } 1086 1087 #ifdef ENABLE_LE_CENTRAL 1088 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1089 1090 int offset = 3; 1091 int num_reports = packet[offset]; 1092 offset += 1; 1093 1094 int i; 1095 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1096 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1097 for (i=0; (i<num_reports) && (offset < size);i++){ 1098 // sanity checks on data_length: 1099 uint8_t data_length = packet[offset + 8]; 1100 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1101 if ((offset + 9u + data_length + 1u) > size) return; 1102 // setup event 1103 uint8_t event_size = 10u + data_length; 1104 int pos = 0; 1105 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1106 event[pos++] = event_size; 1107 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1108 offset += 8; 1109 pos += 8; 1110 event[pos++] = packet[offset + 1 + data_length]; // rssi 1111 event[pos++] = data_length; 1112 offset++; 1113 (void)memcpy(&event[pos], &packet[offset], data_length); 1114 pos += data_length; 1115 offset += data_length + 1u; // rssi 1116 hci_emit_event(event, pos, 1); 1117 } 1118 } 1119 #endif 1120 #endif 1121 1122 #ifdef ENABLE_BLE 1123 #ifdef ENABLE_LE_PERIPHERAL 1124 static void hci_update_advertisements_enabled_for_current_roles(void){ 1125 if (hci_stack->le_advertisements_enabled){ 1126 // get number of active le slave connections 1127 int num_slave_connections = 0; 1128 btstack_linked_list_iterator_t it; 1129 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1130 while (btstack_linked_list_iterator_has_next(&it)){ 1131 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1132 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1133 if (con->state != OPEN) continue; 1134 if (con->role != HCI_ROLE_SLAVE) continue; 1135 if (!hci_is_le_connection(con)) continue; 1136 num_slave_connections++; 1137 } 1138 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1139 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1140 } else { 1141 hci_stack->le_advertisements_enabled_for_current_roles = false; 1142 } 1143 } 1144 #endif 1145 #endif 1146 1147 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1148 1149 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1150 if (!hci_stack->config) return 0; 1151 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1152 // Limit baud rate for Broadcom chipsets to 3 mbps 1153 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1154 baud_rate = 3000000; 1155 } 1156 return baud_rate; 1157 } 1158 1159 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1160 UNUSED(ds); 1161 1162 switch (hci_stack->substate){ 1163 case HCI_INIT_W4_SEND_RESET: 1164 log_info("Resend HCI Reset"); 1165 hci_stack->substate = HCI_INIT_SEND_RESET; 1166 hci_stack->num_cmd_packets = 1; 1167 hci_run(); 1168 break; 1169 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1170 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1171 if (hci_stack->hci_transport->reset_link){ 1172 hci_stack->hci_transport->reset_link(); 1173 } 1174 1175 /* fall through */ 1176 1177 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1178 log_info("Resend HCI Reset - CSR Warm Boot"); 1179 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1180 hci_stack->num_cmd_packets = 1; 1181 hci_run(); 1182 break; 1183 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1184 if (hci_stack->hci_transport->set_baudrate){ 1185 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1186 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1187 hci_stack->hci_transport->set_baudrate(baud_rate); 1188 } 1189 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1190 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1191 if (hci_stack->hci_transport->reset_link){ 1192 log_info("Link Reset"); 1193 hci_stack->hci_transport->reset_link(); 1194 } 1195 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1196 hci_run(); 1197 } 1198 break; 1199 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1200 // otherwise continue 1201 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1202 hci_send_cmd(&hci_read_local_supported_commands); 1203 break; 1204 default: 1205 break; 1206 } 1207 } 1208 #endif 1209 1210 static void hci_initializing_next_state(void){ 1211 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1212 } 1213 1214 // assumption: hci_can_send_command_packet_now() == true 1215 static void hci_initializing_run(void){ 1216 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1217 switch (hci_stack->substate){ 1218 case HCI_INIT_SEND_RESET: 1219 hci_state_reset(); 1220 1221 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1222 // prepare reset if command complete not received in 100ms 1223 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1224 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1225 btstack_run_loop_add_timer(&hci_stack->timeout); 1226 #endif 1227 // send command 1228 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1229 hci_send_cmd(&hci_reset); 1230 break; 1231 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1232 hci_send_cmd(&hci_read_local_version_information); 1233 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1234 break; 1235 case HCI_INIT_SEND_READ_LOCAL_NAME: 1236 hci_send_cmd(&hci_read_local_name); 1237 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1238 break; 1239 1240 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1241 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1242 hci_state_reset(); 1243 // prepare reset if command complete not received in 100ms 1244 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1245 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1246 btstack_run_loop_add_timer(&hci_stack->timeout); 1247 // send command 1248 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1249 hci_send_cmd(&hci_reset); 1250 break; 1251 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1252 hci_state_reset(); 1253 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1254 hci_send_cmd(&hci_reset); 1255 break; 1256 case HCI_INIT_SEND_BAUD_CHANGE: { 1257 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1258 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1259 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1260 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1261 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1262 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1263 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1264 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1265 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1266 btstack_run_loop_add_timer(&hci_stack->timeout); 1267 } 1268 break; 1269 } 1270 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1271 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1272 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1273 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1274 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1275 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1276 break; 1277 } 1278 case HCI_INIT_CUSTOM_INIT: 1279 // Custom initialization 1280 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1281 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1282 int send_cmd = 0; 1283 switch (hci_stack->chipset_result){ 1284 case BTSTACK_CHIPSET_VALID_COMMAND: 1285 send_cmd = 1; 1286 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1287 break; 1288 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1289 send_cmd = 1; 1290 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1291 log_info("CSR Warm Boot"); 1292 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1293 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1294 btstack_run_loop_add_timer(&hci_stack->timeout); 1295 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1296 && hci_stack->config 1297 && hci_stack->chipset 1298 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1299 && hci_stack->hci_transport->set_baudrate 1300 && hci_transport_uart_get_main_baud_rate()){ 1301 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1302 } else { 1303 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1304 } 1305 break; 1306 default: 1307 break; 1308 } 1309 1310 if (send_cmd){ 1311 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1312 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1313 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1314 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1315 break; 1316 } 1317 log_info("Init script done"); 1318 1319 // Init script download on Broadcom chipsets causes: 1320 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1321 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1322 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1323 1324 // - baud rate to reset, restore UART baud rate if needed 1325 int need_baud_change = hci_stack->config 1326 && hci_stack->chipset 1327 && hci_stack->chipset->set_baudrate_command 1328 && hci_stack->hci_transport->set_baudrate 1329 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1330 if (need_baud_change) { 1331 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1332 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1333 hci_stack->hci_transport->set_baudrate(baud_rate); 1334 } 1335 1336 uint16_t bcm_delay_ms = 300; 1337 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1338 // -> Work around: wait here. 1339 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1340 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1341 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1342 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1343 btstack_run_loop_add_timer(&hci_stack->timeout); 1344 break; 1345 } 1346 } 1347 // otherwise continue 1348 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1349 hci_send_cmd(&hci_read_local_supported_commands); 1350 break; 1351 case HCI_INIT_SET_BD_ADDR: 1352 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1353 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1354 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1355 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1356 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1357 break; 1358 #endif 1359 1360 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1361 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1362 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1363 hci_send_cmd(&hci_read_local_supported_commands); 1364 break; 1365 case HCI_INIT_READ_BD_ADDR: 1366 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1367 hci_send_cmd(&hci_read_bd_addr); 1368 break; 1369 case HCI_INIT_READ_BUFFER_SIZE: 1370 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1371 hci_send_cmd(&hci_read_buffer_size); 1372 break; 1373 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1374 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1375 hci_send_cmd(&hci_read_local_supported_features); 1376 break; 1377 1378 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1379 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1380 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1381 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1382 break; 1383 case HCI_INIT_HOST_BUFFER_SIZE: 1384 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1385 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1386 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1387 break; 1388 #endif 1389 1390 case HCI_INIT_SET_EVENT_MASK: 1391 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1392 if (hci_le_supported()){ 1393 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1394 } else { 1395 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1396 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1397 } 1398 break; 1399 1400 #ifdef ENABLE_CLASSIC 1401 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1402 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1403 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1404 break; 1405 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1406 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1407 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1408 break; 1409 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1410 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1411 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1412 break; 1413 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1414 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1415 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1416 break; 1417 case HCI_INIT_WRITE_LOCAL_NAME: { 1418 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1419 hci_reserve_packet_buffer(); 1420 uint8_t * packet = hci_stack->hci_packet_buffer; 1421 // construct HCI Command and send 1422 uint16_t opcode = hci_write_local_name.opcode; 1423 hci_stack->last_cmd_opcode = opcode; 1424 packet[0] = opcode & 0xff; 1425 packet[1] = opcode >> 8; 1426 packet[2] = DEVICE_NAME_LEN; 1427 memset(&packet[3], 0, DEVICE_NAME_LEN); 1428 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1429 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1430 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1431 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1432 // expand '00:00:00:00:00:00' in name with bd_addr 1433 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1434 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1435 break; 1436 } 1437 case HCI_INIT_WRITE_EIR_DATA: { 1438 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1439 hci_reserve_packet_buffer(); 1440 uint8_t * packet = hci_stack->hci_packet_buffer; 1441 // construct HCI Command in-place and send 1442 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1443 hci_stack->last_cmd_opcode = opcode; 1444 uint16_t offset = 0; 1445 packet[offset++] = opcode & 0xff; 1446 packet[offset++] = opcode >> 8; 1447 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1448 packet[offset++] = 0; // FEC not required 1449 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1450 if (hci_stack->eir_data){ 1451 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1452 ad_context_t context; 1453 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1454 uint8_t data_type = ad_iterator_get_data_type(&context); 1455 uint8_t size = ad_iterator_get_data_len(&context); 1456 const uint8_t *data = ad_iterator_get_data(&context); 1457 // copy item 1458 packet[offset++] = size + 1; 1459 packet[offset++] = data_type; 1460 memcpy(&packet[offset], data, size); 1461 // update name item 1462 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1463 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1464 } 1465 offset += size; 1466 } 1467 } else { 1468 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1469 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1470 packet[offset++] = bytes_to_copy + 1; 1471 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1472 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1473 // expand '00:00:00:00:00:00' in name with bd_addr 1474 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1475 } 1476 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1477 break; 1478 } 1479 case HCI_INIT_WRITE_INQUIRY_MODE: 1480 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1481 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1482 break; 1483 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1484 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1485 hci_stack->secure_connections_active = true; 1486 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1487 break; 1488 case HCI_INIT_WRITE_SCAN_ENABLE: 1489 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1490 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1491 break; 1492 // only sent if ENABLE_SCO_OVER_HCI is defined 1493 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1494 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1495 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1496 break; 1497 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1498 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1499 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1500 break; 1501 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1502 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1503 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1504 #ifdef ENABLE_SCO_OVER_HCI 1505 log_info("BCM: Route SCO data via HCI transport"); 1506 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1507 #endif 1508 #ifdef ENABLE_SCO_OVER_PCM 1509 log_info("BCM: Route SCO data via PCM interface"); 1510 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 4, 0, 1, 1); 1511 #endif 1512 break; 1513 1514 #endif 1515 #ifdef ENABLE_BLE 1516 // LE INIT 1517 case HCI_INIT_LE_READ_BUFFER_SIZE: 1518 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1519 hci_send_cmd(&hci_le_read_buffer_size); 1520 break; 1521 case HCI_INIT_LE_SET_EVENT_MASK: 1522 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1523 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1524 break; 1525 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1526 // LE Supported Host = 1, Simultaneous Host = 0 1527 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1528 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1529 break; 1530 #endif 1531 1532 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1533 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1534 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1535 hci_send_cmd(&hci_le_read_maximum_data_length); 1536 break; 1537 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1538 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1539 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1540 break; 1541 #endif 1542 1543 #ifdef ENABLE_LE_CENTRAL 1544 case HCI_INIT_READ_WHITE_LIST_SIZE: 1545 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1546 hci_send_cmd(&hci_le_read_white_list_size); 1547 break; 1548 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1549 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1550 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); 1551 break; 1552 #endif 1553 default: 1554 return; 1555 } 1556 } 1557 1558 static void hci_init_done(void){ 1559 // done. tell the app 1560 log_info("hci_init_done -> HCI_STATE_WORKING"); 1561 hci_stack->state = HCI_STATE_WORKING; 1562 hci_emit_state(); 1563 hci_run(); 1564 } 1565 1566 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1567 bool command_completed = false; 1568 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1569 uint16_t opcode = little_endian_read_16(packet,3); 1570 if (opcode == hci_stack->last_cmd_opcode){ 1571 command_completed = true; 1572 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1573 } else { 1574 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1575 } 1576 } 1577 1578 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1579 uint8_t status = packet[2]; 1580 uint16_t opcode = little_endian_read_16(packet,4); 1581 if (opcode == hci_stack->last_cmd_opcode){ 1582 if (status){ 1583 command_completed = true; 1584 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1585 } else { 1586 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1587 } 1588 } else { 1589 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1590 } 1591 } 1592 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1593 // Vendor == CSR 1594 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1595 // TODO: track actual command 1596 command_completed = true; 1597 } 1598 1599 // Vendor == Toshiba 1600 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1601 // TODO: track actual command 1602 command_completed = true; 1603 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1604 hci_stack->num_cmd_packets = 1; 1605 } 1606 #endif 1607 1608 return command_completed; 1609 } 1610 1611 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1612 1613 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1614 1615 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1616 1617 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1618 1619 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1620 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1621 // 1622 // HCI Reset 1623 // Timeout 100 ms 1624 // HCI Reset 1625 // Command Complete Reset 1626 // HCI Read Local Version Information 1627 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1628 // hang... 1629 // 1630 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1631 if (!command_completed 1632 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1633 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1634 1635 uint16_t opcode = little_endian_read_16(packet,3); 1636 if (opcode == hci_reset.opcode){ 1637 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1638 return; 1639 } 1640 } 1641 1642 // CSR & H5 1643 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1644 if (!command_completed 1645 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1646 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1647 1648 uint16_t opcode = little_endian_read_16(packet,3); 1649 if (opcode == hci_reset.opcode){ 1650 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1651 return; 1652 } 1653 } 1654 1655 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1656 // fix: Correct substate and behave as command below 1657 if (command_completed){ 1658 switch (hci_stack->substate){ 1659 case HCI_INIT_SEND_RESET: 1660 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1661 break; 1662 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1663 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1664 break; 1665 default: 1666 break; 1667 } 1668 } 1669 1670 #endif 1671 1672 if (!command_completed) return; 1673 1674 bool need_baud_change = false; 1675 bool need_addr_change = false; 1676 1677 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1678 need_baud_change = hci_stack->config 1679 && hci_stack->chipset 1680 && hci_stack->chipset->set_baudrate_command 1681 && hci_stack->hci_transport->set_baudrate 1682 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1683 1684 need_addr_change = hci_stack->custom_bd_addr_set 1685 && hci_stack->chipset 1686 && hci_stack->chipset->set_bd_addr_command; 1687 #endif 1688 1689 switch(hci_stack->substate){ 1690 1691 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1692 case HCI_INIT_SEND_RESET: 1693 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1694 // fix: just correct substate and behave as command below 1695 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1696 btstack_run_loop_remove_timer(&hci_stack->timeout); 1697 break; 1698 case HCI_INIT_W4_SEND_RESET: 1699 btstack_run_loop_remove_timer(&hci_stack->timeout); 1700 break; 1701 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1702 log_info("Received local name, need baud change %d", (int) need_baud_change); 1703 if (need_baud_change){ 1704 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1705 return; 1706 } 1707 // skip baud change 1708 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1709 return; 1710 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1711 // for STLC2500D, baud rate change already happened. 1712 // for others, baud rate gets changed now 1713 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1714 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1715 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1716 hci_stack->hci_transport->set_baudrate(baud_rate); 1717 } 1718 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1719 return; 1720 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1721 btstack_run_loop_remove_timer(&hci_stack->timeout); 1722 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1723 return; 1724 case HCI_INIT_W4_CUSTOM_INIT: 1725 // repeat custom init 1726 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1727 return; 1728 #else 1729 case HCI_INIT_W4_SEND_RESET: 1730 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1731 return ; 1732 #endif 1733 1734 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1735 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1736 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1737 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1738 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1739 return; 1740 } 1741 if (need_addr_change){ 1742 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1743 return; 1744 } 1745 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1746 return; 1747 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1748 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1749 if (need_baud_change){ 1750 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1751 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1752 hci_stack->hci_transport->set_baudrate(baud_rate); 1753 } 1754 if (need_addr_change){ 1755 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1756 return; 1757 } 1758 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1759 return; 1760 case HCI_INIT_W4_SET_BD_ADDR: 1761 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1762 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1763 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1764 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1765 return; 1766 } 1767 // skipping st warm boot 1768 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1769 return; 1770 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1771 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1772 return; 1773 #endif 1774 case HCI_INIT_W4_READ_BD_ADDR: 1775 // only read buffer size if supported 1776 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1777 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1778 return; 1779 } 1780 // skipping read buffer size 1781 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1782 return; 1783 case HCI_INIT_W4_SET_EVENT_MASK: 1784 // skip Classic init commands for LE only chipsets 1785 if (!hci_classic_supported()){ 1786 #ifdef ENABLE_BLE 1787 if (hci_le_supported()){ 1788 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1789 return; 1790 } 1791 #endif 1792 log_error("Neither BR/EDR nor LE supported"); 1793 hci_init_done(); 1794 return; 1795 } 1796 if (!gap_ssp_supported()){ 1797 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1798 return; 1799 } 1800 break; 1801 #ifdef ENABLE_BLE 1802 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1803 // skip write le host if not supported (e.g. on LE only EM9301) 1804 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1805 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1806 return; 1807 1808 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1809 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1810 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1811 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1812 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1813 return; 1814 } 1815 // explicit fall through to reduce repetitions 1816 1817 #ifdef ENABLE_LE_CENTRAL 1818 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1819 #else 1820 hci_init_done(); 1821 #endif 1822 return; 1823 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1824 1825 #endif /* ENABLE_BLE */ 1826 1827 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1828 // skip write secure connections host support if not supported or disabled 1829 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1830 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1831 return; 1832 } 1833 break; 1834 1835 #ifdef ENABLE_SCO_OVER_HCI 1836 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1837 // skip write synchronous flow control if not supported 1838 if (hci_stack->local_supported_commands[0] & 0x04) break; 1839 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1840 1841 /* fall through */ 1842 1843 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1844 // skip write default erroneous data reporting if not supported 1845 if (hci_stack->local_supported_commands[0] & 0x08) break; 1846 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1847 1848 /* fall through */ 1849 1850 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1851 // skip bcm set sco pcm config on non-Broadcom chipsets 1852 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1853 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1854 1855 /* fall through */ 1856 1857 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1858 if (!hci_le_supported()){ 1859 // SKIP LE init for Classic only configuration 1860 hci_init_done(); 1861 return; 1862 } 1863 break; 1864 1865 #else /* !ENABLE_SCO_OVER_HCI */ 1866 1867 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1868 #ifdef ENABLE_SCO_OVER_PCM 1869 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1870 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1871 return; 1872 } 1873 #endif 1874 /* fall through */ 1875 1876 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1877 #ifdef ENABLE_BLE 1878 if (hci_le_supported()){ 1879 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1880 return; 1881 } 1882 #endif 1883 // SKIP LE init for Classic only configuration 1884 hci_init_done(); 1885 return; 1886 #endif /* ENABLE_SCO_OVER_HCI */ 1887 1888 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1889 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1890 // Response to command before init done state -> init done 1891 case (HCI_INIT_DONE-1): 1892 hci_init_done(); 1893 return; 1894 #endif 1895 1896 default: 1897 break; 1898 } 1899 hci_initializing_next_state(); 1900 } 1901 1902 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1903 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1904 bd_addr_t bd_address; 1905 (void)memcpy(&bd_address, conn->address, 6); 1906 1907 #ifdef ENABLE_CLASSIC 1908 // cache needed data 1909 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1910 #endif 1911 1912 // connection failed, remove entry 1913 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1914 btstack_memory_hci_connection_free( conn ); 1915 1916 #ifdef ENABLE_CLASSIC 1917 // notify client if dedicated bonding 1918 if (notify_dedicated_bonding_failed){ 1919 log_info("hci notify_dedicated_bonding_failed"); 1920 hci_emit_dedicated_bonding_result(bd_address, status); 1921 } 1922 1923 // if authentication error, also delete link key 1924 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1925 gap_drop_link_key_for_bd_addr(bd_address); 1926 } 1927 #else 1928 UNUSED(status); 1929 #endif 1930 } 1931 1932 #ifdef ENABLE_CLASSIC 1933 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1934 // SSP Controller 1935 if (features[6] & (1 << 3)){ 1936 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1937 } 1938 // eSCO 1939 if (features[3] & (1<<7)){ 1940 conn->remote_supported_features[0] |= 1; 1941 } 1942 // Extended features 1943 if (features[7] & (1<<7)){ 1944 conn->remote_supported_features[0] |= 2; 1945 } 1946 } 1947 1948 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1949 // SSP Host 1950 if (features[0] & (1 << 0)){ 1951 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1952 } 1953 // SC Host 1954 if (features[0] & (1 << 3)){ 1955 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1956 } 1957 } 1958 1959 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1960 // SC Controller 1961 if (features[1] & (1 << 0)){ 1962 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1963 } 1964 } 1965 1966 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1967 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1968 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1969 if (conn->bonding_flags & BONDING_DEDICATED){ 1970 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1971 } 1972 } 1973 #endif 1974 1975 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1976 // handle BT initialization 1977 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1978 hci_initializing_event_handler(packet, size); 1979 } 1980 1981 // help with BT sleep 1982 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1983 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1984 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1985 hci_initializing_next_state(); 1986 } 1987 } 1988 1989 #ifdef ENABLE_CLASSIC 1990 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 1991 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1992 conn->encryption_key_size = encryption_key_size; 1993 1994 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 1995 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 1996 return; 1997 } 1998 1999 // Request Authentication if not already done 2000 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2001 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2002 } 2003 #endif 2004 2005 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2006 UNUSED(size); 2007 2008 uint16_t manufacturer; 2009 #ifdef ENABLE_CLASSIC 2010 hci_con_handle_t handle; 2011 hci_connection_t * conn; 2012 uint8_t status; 2013 #endif 2014 // get num cmd packets - limit to 1 to reduce complexity 2015 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2016 2017 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2018 switch (opcode){ 2019 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2020 if (packet[5]) break; 2021 // terminate, name 248 chars 2022 packet[6+248] = 0; 2023 log_info("local name: %s", &packet[6]); 2024 break; 2025 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2026 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2027 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2028 uint16_t acl_len = little_endian_read_16(packet, 6); 2029 uint16_t sco_len = packet[8]; 2030 2031 // determine usable ACL/SCO payload size 2032 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2033 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2034 2035 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2036 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2037 2038 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2039 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2040 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2041 } 2042 break; 2043 case HCI_OPCODE_HCI_READ_RSSI: 2044 if (packet[5] == ERROR_CODE_SUCCESS){ 2045 uint8_t event[5]; 2046 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2047 event[1] = 3; 2048 (void)memcpy(&event[2], &packet[6], 3); 2049 hci_emit_event(event, sizeof(event), 1); 2050 } 2051 break; 2052 #ifdef ENABLE_BLE 2053 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2054 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2055 hci_stack->le_acl_packets_total_num = packet[8]; 2056 // determine usable ACL payload size 2057 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2058 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2059 } 2060 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2061 break; 2062 #endif 2063 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2064 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2065 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2066 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2067 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); 2068 break; 2069 #endif 2070 #ifdef ENABLE_LE_CENTRAL 2071 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2072 hci_stack->le_whitelist_capacity = packet[6]; 2073 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2074 break; 2075 #endif 2076 case HCI_OPCODE_HCI_READ_BD_ADDR: 2077 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2078 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)); 2079 #ifdef ENABLE_CLASSIC 2080 if (hci_stack->link_key_db){ 2081 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2082 } 2083 #endif 2084 break; 2085 #ifdef ENABLE_CLASSIC 2086 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2087 hci_emit_discoverable_enabled(hci_stack->discoverable); 2088 break; 2089 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2090 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2091 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2092 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2093 hci_emit_event(event, sizeof(event), 1); 2094 } 2095 break; 2096 #endif 2097 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2098 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2099 2100 #ifdef ENABLE_CLASSIC 2101 // determine usable ACL packet types based on host buffer size and supported features 2102 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2103 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2104 #endif 2105 // Classic/LE 2106 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2107 break; 2108 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2109 manufacturer = little_endian_read_16(packet, 10); 2110 // map Cypress to Broadcom 2111 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2112 log_info("Treat Cypress as Broadcom"); 2113 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2114 little_endian_store_16(packet, 10, manufacturer); 2115 } 2116 hci_stack->manufacturer = manufacturer; 2117 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2118 break; 2119 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2120 hci_stack->local_supported_commands[0] = 2121 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2122 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2123 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2124 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2125 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2126 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2127 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2128 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2129 hci_stack->local_supported_commands[1] = 2130 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2131 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2132 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u); // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2133 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2134 break; 2135 #ifdef ENABLE_CLASSIC 2136 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2137 if (packet[5]) return; 2138 hci_stack->synchronous_flow_control_enabled = 1; 2139 break; 2140 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2141 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2142 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2143 conn = hci_connection_for_handle(handle); 2144 if (conn != NULL) { 2145 uint8_t key_size = 0; 2146 if (status == 0){ 2147 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2148 log_info("Handle %04x key Size: %u", handle, key_size); 2149 } else { 2150 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2151 } 2152 hci_handle_read_encryption_key_size_complete(conn, key_size); 2153 } 2154 break; 2155 #endif 2156 default: 2157 break; 2158 } 2159 } 2160 2161 #ifdef ENABLE_BLE 2162 static void event_handle_le_connection_complete(const uint8_t * packet){ 2163 bd_addr_t addr; 2164 bd_addr_type_t addr_type; 2165 hci_connection_t * conn; 2166 2167 // Connection management 2168 reverse_bd_addr(&packet[8], addr); 2169 addr_type = (bd_addr_type_t)packet[7]; 2170 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2171 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2172 2173 #ifdef ENABLE_LE_CENTRAL 2174 // handle error: error is reported only to the initiator -> outgoing connection 2175 if (packet[3]){ 2176 2177 // handle cancelled outgoing connection 2178 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2179 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2180 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2181 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2182 // whitelist connect 2183 if (hci_is_le_connection_type(addr_type)){ 2184 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2185 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2186 } 2187 // get outgoing connection conn struct for direct connect 2188 conn = gap_get_outgoing_connection(); 2189 } 2190 2191 // outgoing le connection establishment is done 2192 if (conn){ 2193 // remove entry 2194 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2195 btstack_memory_hci_connection_free( conn ); 2196 } 2197 return; 2198 } 2199 #endif 2200 2201 // on success, both hosts receive connection complete event 2202 if (packet[6] == HCI_ROLE_MASTER){ 2203 #ifdef ENABLE_LE_CENTRAL 2204 // if we're master on an le connection, it was an outgoing connection and we're done with it 2205 // note: no hci_connection_t object exists yet for connect with whitelist 2206 if (hci_is_le_connection_type(addr_type)){ 2207 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2208 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2209 } 2210 #endif 2211 } else { 2212 #ifdef ENABLE_LE_PERIPHERAL 2213 // if we're slave, it was an incoming connection, advertisements have stopped 2214 hci_stack->le_advertisements_active = false; 2215 #endif 2216 } 2217 2218 // LE connections are auto-accepted, so just create a connection if there isn't one already 2219 if (!conn){ 2220 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2221 } 2222 2223 // no memory, sorry. 2224 if (!conn){ 2225 return; 2226 } 2227 2228 conn->state = OPEN; 2229 conn->role = packet[6]; 2230 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2231 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2232 2233 #ifdef ENABLE_LE_PERIPHERAL 2234 if (packet[6] == HCI_ROLE_SLAVE){ 2235 hci_update_advertisements_enabled_for_current_roles(); 2236 } 2237 #endif 2238 2239 // init unenhanced att bearer mtu 2240 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2241 conn->att_connection.mtu_exchanged = false; 2242 2243 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2244 2245 // restart timer 2246 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2247 // btstack_run_loop_add_timer(&conn->timeout); 2248 2249 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2250 2251 hci_emit_nr_connections_changed(); 2252 } 2253 #endif 2254 2255 static void event_handler(uint8_t *packet, uint16_t size){ 2256 2257 uint16_t event_length = packet[1]; 2258 2259 // assert packet is complete 2260 if (size != (event_length + 2u)){ 2261 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2262 return; 2263 } 2264 2265 bd_addr_type_t addr_type; 2266 hci_con_handle_t handle; 2267 hci_connection_t * conn; 2268 int i; 2269 int create_connection_cmd; 2270 2271 #ifdef ENABLE_CLASSIC 2272 uint8_t link_type; 2273 bd_addr_t addr; 2274 #endif 2275 2276 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2277 2278 switch (hci_event_packet_get_type(packet)) { 2279 2280 case HCI_EVENT_COMMAND_COMPLETE: 2281 handle_command_complete_event(packet, size); 2282 break; 2283 2284 case HCI_EVENT_COMMAND_STATUS: 2285 // get num cmd packets - limit to 1 to reduce complexity 2286 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2287 2288 // check command status to detected failed outgoing connections 2289 create_connection_cmd = 0; 2290 #ifdef ENABLE_CLASSIC 2291 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2292 create_connection_cmd = 1; 2293 } 2294 #endif 2295 #ifdef ENABLE_LE_CENTRAL 2296 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2297 create_connection_cmd = 1; 2298 } 2299 #endif 2300 if (create_connection_cmd) { 2301 uint8_t status = hci_event_command_status_get_status(packet); 2302 addr_type = hci_stack->outgoing_addr_type; 2303 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2304 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); 2305 2306 // reset outgoing address info 2307 memset(hci_stack->outgoing_addr, 0, 6); 2308 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2309 2310 // on error 2311 if (status != ERROR_CODE_SUCCESS){ 2312 #ifdef ENABLE_LE_CENTRAL 2313 if (hci_is_le_connection_type(addr_type)){ 2314 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2315 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2316 } 2317 #endif 2318 // error => outgoing connection failed 2319 if (conn != NULL){ 2320 hci_handle_connection_failed(conn, status); 2321 } 2322 } 2323 } 2324 break; 2325 2326 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2327 if (size < 3) return; 2328 uint16_t num_handles = packet[2]; 2329 if (size != (3u + num_handles * 4u)) return; 2330 uint16_t offset = 3; 2331 for (i=0; i<num_handles;i++){ 2332 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2333 offset += 2u; 2334 uint16_t num_packets = little_endian_read_16(packet, offset); 2335 offset += 2u; 2336 2337 conn = hci_connection_for_handle(handle); 2338 if (!conn){ 2339 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2340 continue; 2341 } 2342 2343 if (conn->num_packets_sent >= num_packets){ 2344 conn->num_packets_sent -= num_packets; 2345 } else { 2346 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2347 conn->num_packets_sent = 0; 2348 } 2349 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2350 2351 #ifdef ENABLE_CLASSIC 2352 // For SCO, we do the can_send_now_check here 2353 hci_notify_if_sco_can_send_now(); 2354 #endif 2355 } 2356 break; 2357 } 2358 2359 #ifdef ENABLE_CLASSIC 2360 case HCI_EVENT_INQUIRY_COMPLETE: 2361 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2362 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2363 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2364 hci_emit_event(event, sizeof(event), 1); 2365 } 2366 break; 2367 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2368 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2369 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2370 } 2371 break; 2372 case HCI_EVENT_CONNECTION_REQUEST: 2373 reverse_bd_addr(&packet[2], addr); 2374 if (hci_stack->gap_classic_accept_callback != NULL){ 2375 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2376 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2377 bd_addr_copy(hci_stack->decline_addr, addr); 2378 break; 2379 } 2380 } 2381 2382 // TODO: eval COD 8-10 2383 link_type = packet[11]; 2384 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2385 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2386 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2387 if (!conn) { 2388 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2389 } 2390 if (!conn) { 2391 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2392 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2393 bd_addr_copy(hci_stack->decline_addr, addr); 2394 break; 2395 } 2396 conn->role = HCI_ROLE_SLAVE; 2397 conn->state = RECEIVED_CONNECTION_REQUEST; 2398 // store info about eSCO 2399 if (link_type == 0x02){ 2400 conn->remote_supported_features[0] |= 1; 2401 } 2402 hci_run(); 2403 break; 2404 2405 case HCI_EVENT_CONNECTION_COMPLETE: 2406 // Connection management 2407 reverse_bd_addr(&packet[5], addr); 2408 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2409 addr_type = BD_ADDR_TYPE_ACL; 2410 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2411 if (conn) { 2412 if (!packet[2]){ 2413 conn->state = OPEN; 2414 conn->con_handle = little_endian_read_16(packet, 3); 2415 2416 // queue get remote feature 2417 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2418 2419 // queue set supervision timeout if we're master 2420 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2421 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2422 } 2423 2424 // restart timer 2425 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2426 btstack_run_loop_add_timer(&conn->timeout); 2427 2428 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2429 2430 hci_emit_nr_connections_changed(); 2431 } else { 2432 // connection failed 2433 hci_handle_connection_failed(conn, packet[2]); 2434 } 2435 } 2436 break; 2437 2438 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2439 reverse_bd_addr(&packet[5], addr); 2440 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2441 if (packet[2]){ 2442 // connection failed 2443 break; 2444 } 2445 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2446 if (!conn) { 2447 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2448 } 2449 if (!conn) { 2450 break; 2451 } 2452 conn->state = OPEN; 2453 conn->con_handle = little_endian_read_16(packet, 3); 2454 2455 #ifdef ENABLE_SCO_OVER_HCI 2456 // update SCO 2457 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2458 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2459 } 2460 // trigger can send now 2461 if (hci_have_usb_transport()){ 2462 hci_stack->sco_can_send_now = 1; 2463 } 2464 #endif 2465 break; 2466 2467 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2468 handle = little_endian_read_16(packet, 3); 2469 conn = hci_connection_for_handle(handle); 2470 if (!conn) break; 2471 if (!packet[2]){ 2472 const uint8_t * features = &packet[5]; 2473 hci_handle_remote_features_page_0(conn, features); 2474 2475 // read extended features if possible 2476 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2477 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2478 break; 2479 } 2480 } 2481 hci_handle_remote_features_received(conn); 2482 break; 2483 2484 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2485 handle = little_endian_read_16(packet, 3); 2486 conn = hci_connection_for_handle(handle); 2487 if (!conn) break; 2488 // status = ok, page = 1 2489 if (!packet[2]) { 2490 uint8_t page_number = packet[5]; 2491 uint8_t maximum_page_number = packet[6]; 2492 const uint8_t * features = &packet[7]; 2493 bool done = false; 2494 switch (page_number){ 2495 case 1: 2496 hci_handle_remote_features_page_1(conn, features); 2497 if (maximum_page_number >= 2){ 2498 // get Secure Connections (Controller) from Page 2 if available 2499 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2500 } else { 2501 // otherwise, assume SC (Controller) == SC (Host) 2502 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2503 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2504 } 2505 done = true; 2506 } 2507 break; 2508 case 2: 2509 hci_handle_remote_features_page_2(conn, features); 2510 done = true; 2511 break; 2512 default: 2513 break; 2514 } 2515 if (!done) break; 2516 } 2517 hci_handle_remote_features_received(conn); 2518 break; 2519 2520 case HCI_EVENT_LINK_KEY_REQUEST: 2521 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2522 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2523 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2524 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2525 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2526 hci_run(); 2527 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2528 return; 2529 2530 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2531 reverse_bd_addr(&packet[2], addr); 2532 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2533 if (!conn) break; 2534 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2535 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2536 // Change Connection Encryption keeps link key type 2537 if (link_key_type != CHANGED_COMBINATION_KEY){ 2538 conn->link_key_type = link_key_type; 2539 } 2540 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2541 // still forward event to allow dismiss of pairing dialog 2542 break; 2543 } 2544 2545 case HCI_EVENT_PIN_CODE_REQUEST: 2546 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2547 // non-bondable mode: pin code negative reply will be sent 2548 if (!hci_stack->bondable){ 2549 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2550 hci_run(); 2551 return; 2552 } 2553 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2554 if (!hci_stack->link_key_db) break; 2555 hci_event_pin_code_request_get_bd_addr(packet, addr); 2556 hci_stack->link_key_db->delete_link_key(addr); 2557 break; 2558 2559 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2560 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2561 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2562 break; 2563 2564 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2565 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2566 if (!hci_stack->ssp_auto_accept) break; 2567 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2568 break; 2569 2570 case HCI_EVENT_USER_PASSKEY_REQUEST: 2571 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2572 if (!hci_stack->ssp_auto_accept) break; 2573 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2574 break; 2575 case HCI_EVENT_MODE_CHANGE: 2576 handle = hci_event_mode_change_get_handle(packet); 2577 conn = hci_connection_for_handle(handle); 2578 if (!conn) break; 2579 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2580 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2581 break; 2582 #endif 2583 2584 case HCI_EVENT_ENCRYPTION_CHANGE: 2585 handle = hci_event_encryption_change_get_connection_handle(packet); 2586 conn = hci_connection_for_handle(handle); 2587 if (!conn) break; 2588 if (hci_event_encryption_change_get_status(packet) == 0u) { 2589 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2590 if (encryption_enabled){ 2591 if (hci_is_le_connection(conn)){ 2592 // For LE, we accept connection as encrypted 2593 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2594 } 2595 #ifdef ENABLE_CLASSIC 2596 else { 2597 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2598 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2599 bool connected_uses_aes_ccm = encryption_enabled == 2; 2600 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2601 log_info("SC during pairing, but only E0 now -> abort"); 2602 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2603 break; 2604 } 2605 2606 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2607 if (connected_uses_aes_ccm){ 2608 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2609 } 2610 2611 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2612 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2613 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2614 } else { 2615 // if not, pretend everything is perfect 2616 hci_handle_read_encryption_key_size_complete(conn, 16); 2617 } 2618 } 2619 #endif 2620 } else { 2621 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2622 } 2623 } 2624 2625 break; 2626 2627 #ifdef ENABLE_CLASSIC 2628 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2629 handle = hci_event_authentication_complete_get_connection_handle(packet); 2630 conn = hci_connection_for_handle(handle); 2631 if (!conn) break; 2632 2633 // ignore authentication event if we didn't request it 2634 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2635 2636 // dedicated bonding: send result and disconnect 2637 if (conn->bonding_flags & BONDING_DEDICATED){ 2638 conn->bonding_flags &= ~BONDING_DEDICATED; 2639 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2640 conn->bonding_status = packet[2]; 2641 break; 2642 } 2643 2644 // authenticated only if auth status == 0 2645 if (hci_event_authentication_complete_get_status(packet) == 0){ 2646 // authenticated 2647 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2648 2649 // If link key sufficient for requested security and not already encrypted, start encryption 2650 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2651 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2652 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2653 break; 2654 } 2655 } 2656 2657 // emit updated security level 2658 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2659 break; 2660 #endif 2661 2662 // HCI_EVENT_DISCONNECTION_COMPLETE 2663 // has been split, to first notify stack before shutting connection down 2664 // see end of function, too. 2665 case HCI_EVENT_DISCONNECTION_COMPLETE: 2666 if (packet[2]) break; // status != 0 2667 handle = little_endian_read_16(packet, 3); 2668 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2669 if (hci_stack->acl_fragmentation_total_size > 0u) { 2670 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2671 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2672 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2673 hci_stack->acl_fragmentation_total_size = 0; 2674 hci_stack->acl_fragmentation_pos = 0; 2675 if (release_buffer){ 2676 hci_release_packet_buffer(); 2677 } 2678 } 2679 } 2680 2681 conn = hci_connection_for_handle(handle); 2682 if (!conn) break; 2683 // mark connection for shutdown 2684 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2685 2686 // emit dedicatd bonding event 2687 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2688 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2689 } 2690 2691 #ifdef ENABLE_BLE 2692 #ifdef ENABLE_LE_PERIPHERAL 2693 // re-enable advertisements for le connections if active 2694 if (hci_is_le_connection(conn)){ 2695 hci_update_advertisements_enabled_for_current_roles(); 2696 } 2697 #endif 2698 #endif 2699 break; 2700 2701 case HCI_EVENT_HARDWARE_ERROR: 2702 log_error("Hardware Error: 0x%02x", packet[2]); 2703 if (hci_stack->hardware_error_callback){ 2704 (*hci_stack->hardware_error_callback)(packet[2]); 2705 } else { 2706 // if no special requests, just reboot stack 2707 hci_power_control_off(); 2708 hci_power_control_on(); 2709 } 2710 break; 2711 2712 #ifdef ENABLE_CLASSIC 2713 case HCI_EVENT_ROLE_CHANGE: 2714 if (packet[2]) break; // status != 0 2715 reverse_bd_addr(&packet[3], addr); 2716 addr_type = BD_ADDR_TYPE_ACL; 2717 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2718 if (!conn) break; 2719 conn->role = packet[9]; 2720 break; 2721 #endif 2722 2723 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2724 // release packet buffer only for asynchronous transport and if there are not further fragements 2725 if (hci_transport_synchronous()) { 2726 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2727 return; // instead of break: to avoid re-entering hci_run() 2728 } 2729 hci_stack->acl_fragmentation_tx_active = 0; 2730 if (hci_stack->acl_fragmentation_total_size) break; 2731 hci_release_packet_buffer(); 2732 2733 // L2CAP receives this event via the hci_emit_event below 2734 2735 #ifdef ENABLE_CLASSIC 2736 // For SCO, we do the can_send_now_check here 2737 hci_notify_if_sco_can_send_now(); 2738 #endif 2739 break; 2740 2741 #ifdef ENABLE_CLASSIC 2742 case HCI_EVENT_SCO_CAN_SEND_NOW: 2743 // For SCO, we do the can_send_now_check here 2744 hci_stack->sco_can_send_now = 1; 2745 hci_notify_if_sco_can_send_now(); 2746 return; 2747 2748 // explode inquriy results for easier consumption 2749 case HCI_EVENT_INQUIRY_RESULT: 2750 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2751 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2752 gap_inquiry_explode(packet, size); 2753 break; 2754 #endif 2755 2756 #ifdef ENABLE_BLE 2757 case HCI_EVENT_LE_META: 2758 switch (packet[2]){ 2759 #ifdef ENABLE_LE_CENTRAL 2760 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2761 // log_info("advertising report received"); 2762 if (!hci_stack->le_scanning_enabled) break; 2763 le_handle_advertisement_report(packet, size); 2764 break; 2765 #endif 2766 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2767 event_handle_le_connection_complete(packet); 2768 break; 2769 2770 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2771 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2772 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2773 conn = hci_connection_for_handle(handle); 2774 if (!conn) break; 2775 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2776 break; 2777 2778 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2779 // connection 2780 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2781 conn = hci_connection_for_handle(handle); 2782 if (conn) { 2783 // read arguments 2784 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2785 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2786 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2787 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2788 2789 // validate against current connection parameter range 2790 le_connection_parameter_range_t existing_range; 2791 gap_get_connection_parameter_range(&existing_range); 2792 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2793 if (update_parameter){ 2794 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2795 conn->le_conn_interval_min = le_conn_interval_min; 2796 conn->le_conn_interval_max = le_conn_interval_max; 2797 conn->le_conn_latency = le_conn_latency; 2798 conn->le_supervision_timeout = le_supervision_timeout; 2799 } else { 2800 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2801 } 2802 } 2803 break; 2804 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2805 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2806 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2807 conn = hci_connection_for_handle(handle); 2808 if (conn) { 2809 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2810 } 2811 break; 2812 #endif 2813 default: 2814 break; 2815 } 2816 break; 2817 #endif 2818 case HCI_EVENT_VENDOR_SPECIFIC: 2819 // Vendor specific commands often create vendor specific event instead of num completed packets 2820 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2821 switch (hci_stack->manufacturer){ 2822 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2823 hci_stack->num_cmd_packets = 1; 2824 break; 2825 default: 2826 break; 2827 } 2828 break; 2829 default: 2830 break; 2831 } 2832 2833 handle_event_for_current_stack_state(packet, size); 2834 2835 // notify upper stack 2836 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2837 2838 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2839 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2840 handle = little_endian_read_16(packet, 3); 2841 hci_connection_t * aConn = hci_connection_for_handle(handle); 2842 // discard connection if app did not trigger a reconnect in the event handler 2843 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2844 hci_shutdown_connection(aConn); 2845 } 2846 } 2847 2848 // execute main loop 2849 hci_run(); 2850 } 2851 2852 #ifdef ENABLE_CLASSIC 2853 2854 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2855 static void sco_schedule_tx(hci_connection_t * conn); 2856 2857 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2858 log_debug("SCO TX Timeout"); 2859 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2860 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2861 if (!conn) return; 2862 2863 // trigger send 2864 conn->sco_tx_ready = 1; 2865 // extra packet if CVSD but SCO buffer is too short 2866 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2867 conn->sco_tx_ready++; 2868 } 2869 hci_notify_if_sco_can_send_now(); 2870 } 2871 2872 2873 #define SCO_TX_AFTER_RX_MS (6) 2874 2875 static void sco_schedule_tx(hci_connection_t * conn){ 2876 2877 uint32_t now = btstack_run_loop_get_time_ms(); 2878 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2879 int time_delta_ms = sco_tx_ms - now; 2880 2881 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2882 2883 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2884 btstack_run_loop_set_timer(timer, time_delta_ms); 2885 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2886 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2887 btstack_run_loop_add_timer(timer); 2888 } 2889 2890 static void sco_handler(uint8_t * packet, uint16_t size){ 2891 // lookup connection struct 2892 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2893 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2894 if (!conn) return; 2895 2896 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2897 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2898 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2899 packet[2] = 0x3c; 2900 memmove(&packet[3], &packet[23], 63); 2901 size = 63; 2902 } 2903 } 2904 2905 if (hci_have_usb_transport()){ 2906 // Nothing to do 2907 } else { 2908 // 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); 2909 if (hci_stack->synchronous_flow_control_enabled == 0){ 2910 uint32_t now = btstack_run_loop_get_time_ms(); 2911 2912 if (!conn->sco_rx_valid){ 2913 // ignore first 10 packets 2914 conn->sco_rx_count++; 2915 // log_debug("sco rx count %u", conn->sco_rx_count); 2916 if (conn->sco_rx_count == 10) { 2917 // use first timestamp as is and pretent it just started 2918 conn->sco_rx_ms = now; 2919 conn->sco_rx_valid = 1; 2920 conn->sco_rx_count = 0; 2921 sco_schedule_tx(conn); 2922 } 2923 } else { 2924 // track expected arrival timme 2925 conn->sco_rx_count++; 2926 conn->sco_rx_ms += 7; 2927 int delta = (int32_t) (now - conn->sco_rx_ms); 2928 if (delta > 0){ 2929 conn->sco_rx_ms++; 2930 } 2931 // log_debug("sco rx %u", conn->sco_rx_ms); 2932 sco_schedule_tx(conn); 2933 } 2934 } 2935 } 2936 // deliver to app 2937 if (hci_stack->sco_packet_handler) { 2938 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2939 } 2940 2941 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2942 conn->num_packets_completed++; 2943 hci_stack->host_completed_packets = 1; 2944 hci_run(); 2945 #endif 2946 } 2947 #endif 2948 2949 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2950 hci_dump_packet(packet_type, 1, packet, size); 2951 switch (packet_type) { 2952 case HCI_EVENT_PACKET: 2953 event_handler(packet, size); 2954 break; 2955 case HCI_ACL_DATA_PACKET: 2956 acl_handler(packet, size); 2957 break; 2958 #ifdef ENABLE_CLASSIC 2959 case HCI_SCO_DATA_PACKET: 2960 sco_handler(packet, size); 2961 break; 2962 #endif 2963 default: 2964 break; 2965 } 2966 } 2967 2968 /** 2969 * @brief Add event packet handler. 2970 */ 2971 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2972 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2973 } 2974 2975 2976 /** Register HCI packet handlers */ 2977 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2978 hci_stack->acl_packet_handler = handler; 2979 } 2980 2981 #ifdef ENABLE_CLASSIC 2982 /** 2983 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2984 */ 2985 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2986 hci_stack->sco_packet_handler = handler; 2987 } 2988 #endif 2989 2990 static void hci_state_reset(void){ 2991 // no connections yet 2992 hci_stack->connections = NULL; 2993 2994 // keep discoverable/connectable as this has been requested by the client(s) 2995 // hci_stack->discoverable = 0; 2996 // hci_stack->connectable = 0; 2997 // hci_stack->bondable = 1; 2998 // hci_stack->own_addr_type = 0; 2999 3000 // buffer is free 3001 hci_stack->hci_packet_buffer_reserved = 0; 3002 3003 // no pending cmds 3004 hci_stack->decline_reason = 0; 3005 hci_stack->new_scan_enable_value = 0xff; 3006 3007 hci_stack->secure_connections_active = false; 3008 3009 // LE 3010 #ifdef ENABLE_BLE 3011 memset(hci_stack->le_random_address, 0, 6); 3012 hci_stack->le_random_address_set = 0; 3013 #endif 3014 #ifdef ENABLE_LE_CENTRAL 3015 hci_stack->le_scanning_active = 0; 3016 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3017 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3018 hci_stack->le_whitelist_capacity = 0; 3019 #endif 3020 } 3021 3022 #ifdef ENABLE_CLASSIC 3023 /** 3024 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3025 */ 3026 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3027 // store and open remote device db 3028 hci_stack->link_key_db = link_key_db; 3029 if (hci_stack->link_key_db) { 3030 hci_stack->link_key_db->open(); 3031 } 3032 } 3033 #endif 3034 3035 void hci_init(const hci_transport_t *transport, const void *config){ 3036 3037 #ifdef HAVE_MALLOC 3038 if (!hci_stack) { 3039 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3040 } 3041 #else 3042 hci_stack = &hci_stack_static; 3043 #endif 3044 memset(hci_stack, 0, sizeof(hci_stack_t)); 3045 3046 // reference to use transport layer implementation 3047 hci_stack->hci_transport = transport; 3048 3049 // reference to used config 3050 hci_stack->config = config; 3051 3052 // setup pointer for outgoing packet buffer 3053 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3054 3055 // max acl payload size defined in config.h 3056 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3057 3058 // register packet handlers with transport 3059 transport->register_packet_handler(&packet_handler); 3060 3061 hci_stack->state = HCI_STATE_OFF; 3062 3063 // class of device 3064 hci_stack->class_of_device = 0x007a020c; // Smartphone 3065 3066 // bondable by default 3067 hci_stack->bondable = 1; 3068 3069 #ifdef ENABLE_CLASSIC 3070 // classic name 3071 hci_stack->local_name = default_classic_name; 3072 3073 // Master slave policy 3074 hci_stack->master_slave_policy = 1; 3075 3076 // Allow Role Switch 3077 hci_stack->allow_role_switch = 1; 3078 3079 // Default / minimum security level = 2 3080 hci_stack->gap_security_level = LEVEL_2; 3081 3082 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3083 hci_stack->gap_required_encyrption_key_size = 7; 3084 #endif 3085 3086 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3087 hci_stack->ssp_enable = 1; 3088 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3089 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3090 hci_stack->ssp_auto_accept = 1; 3091 3092 // Secure Connections: enable (requires support from Controller) 3093 hci_stack->secure_connections_enable = true; 3094 3095 // voice setting - signed 16 bit pcm data with CVSD over the air 3096 hci_stack->sco_voice_setting = 0x60; 3097 3098 #ifdef ENABLE_LE_CENTRAL 3099 // connection parameter to use for outgoing connections 3100 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3101 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3102 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3103 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3104 hci_stack->le_connection_latency = 4; // 4 3105 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3106 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3107 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3108 3109 // default LE Scanning 3110 hci_stack->le_scan_type = 0x1; // active 3111 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3112 hci_stack->le_scan_window = 0x30; // 30 ms 3113 #endif 3114 3115 #ifdef ENABLE_LE_PERIPHERAL 3116 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3117 #endif 3118 3119 // connection parameter range used to answer connection parameter update requests in l2cap 3120 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3121 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3122 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3123 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3124 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3125 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3126 3127 hci_state_reset(); 3128 } 3129 3130 /** 3131 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3132 */ 3133 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3134 hci_stack->chipset = chipset_driver; 3135 3136 // reset chipset driver - init is also called on power_up 3137 if (hci_stack->chipset && hci_stack->chipset->init){ 3138 hci_stack->chipset->init(hci_stack->config); 3139 } 3140 } 3141 3142 /** 3143 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3144 */ 3145 void hci_set_control(const btstack_control_t *hardware_control){ 3146 // references to used control implementation 3147 hci_stack->control = hardware_control; 3148 // init with transport config 3149 hardware_control->init(hci_stack->config); 3150 } 3151 3152 void hci_close(void){ 3153 // close remote device db 3154 if (hci_stack->link_key_db) { 3155 hci_stack->link_key_db->close(); 3156 } 3157 3158 btstack_linked_list_iterator_t lit; 3159 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3160 while (btstack_linked_list_iterator_has_next(&lit)){ 3161 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3162 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3163 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3164 hci_shutdown_connection(connection); 3165 } 3166 3167 hci_power_control(HCI_POWER_OFF); 3168 3169 #ifdef HAVE_MALLOC 3170 free(hci_stack); 3171 #endif 3172 hci_stack = NULL; 3173 } 3174 3175 #ifdef ENABLE_CLASSIC 3176 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3177 // validate ranage and set 3178 if (encryption_key_size < 7) return; 3179 if (encryption_key_size > 16) return; 3180 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3181 } 3182 3183 void gap_set_security_level(gap_security_level_t security_level){ 3184 hci_stack->gap_security_level = security_level; 3185 } 3186 3187 gap_security_level_t gap_get_security_level(void){ 3188 return hci_stack->gap_security_level; 3189 } 3190 #endif 3191 3192 #ifdef ENABLE_CLASSIC 3193 void gap_set_class_of_device(uint32_t class_of_device){ 3194 hci_stack->class_of_device = class_of_device; 3195 } 3196 3197 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3198 hci_stack->default_link_policy_settings = default_link_policy_settings; 3199 } 3200 3201 void gap_set_allow_role_switch(bool allow_role_switch){ 3202 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3203 } 3204 3205 uint8_t hci_get_allow_role_switch(void){ 3206 return hci_stack->allow_role_switch; 3207 } 3208 3209 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3210 hci_stack->link_supervision_timeout = link_supervision_timeout; 3211 } 3212 3213 void hci_disable_l2cap_timeout_check(void){ 3214 disable_l2cap_timeouts = 1; 3215 } 3216 #endif 3217 3218 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3219 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3220 void hci_set_bd_addr(bd_addr_t addr){ 3221 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3222 hci_stack->custom_bd_addr_set = 1; 3223 } 3224 #endif 3225 3226 // State-Module-Driver overview 3227 // state module low-level 3228 // HCI_STATE_OFF off close 3229 // HCI_STATE_INITIALIZING, on open 3230 // HCI_STATE_WORKING, on open 3231 // HCI_STATE_HALTING, on open 3232 // HCI_STATE_SLEEPING, off/sleep close 3233 // HCI_STATE_FALLING_ASLEEP on open 3234 3235 static int hci_power_control_on(void){ 3236 3237 // power on 3238 int err = 0; 3239 if (hci_stack->control && hci_stack->control->on){ 3240 err = (*hci_stack->control->on)(); 3241 } 3242 if (err){ 3243 log_error( "POWER_ON failed"); 3244 hci_emit_hci_open_failed(); 3245 return err; 3246 } 3247 3248 // int chipset driver 3249 if (hci_stack->chipset && hci_stack->chipset->init){ 3250 hci_stack->chipset->init(hci_stack->config); 3251 } 3252 3253 // init transport 3254 if (hci_stack->hci_transport->init){ 3255 hci_stack->hci_transport->init(hci_stack->config); 3256 } 3257 3258 // open transport 3259 err = hci_stack->hci_transport->open(); 3260 if (err){ 3261 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3262 if (hci_stack->control && hci_stack->control->off){ 3263 (*hci_stack->control->off)(); 3264 } 3265 hci_emit_hci_open_failed(); 3266 return err; 3267 } 3268 return 0; 3269 } 3270 3271 static void hci_power_control_off(void){ 3272 3273 log_info("hci_power_control_off"); 3274 3275 // close low-level device 3276 hci_stack->hci_transport->close(); 3277 3278 log_info("hci_power_control_off - hci_transport closed"); 3279 3280 // power off 3281 if (hci_stack->control && hci_stack->control->off){ 3282 (*hci_stack->control->off)(); 3283 } 3284 3285 log_info("hci_power_control_off - control closed"); 3286 3287 hci_stack->state = HCI_STATE_OFF; 3288 } 3289 3290 static void hci_power_control_sleep(void){ 3291 3292 log_info("hci_power_control_sleep"); 3293 3294 #if 0 3295 // don't close serial port during sleep 3296 3297 // close low-level device 3298 hci_stack->hci_transport->close(hci_stack->config); 3299 #endif 3300 3301 // sleep mode 3302 if (hci_stack->control && hci_stack->control->sleep){ 3303 (*hci_stack->control->sleep)(); 3304 } 3305 3306 hci_stack->state = HCI_STATE_SLEEPING; 3307 } 3308 3309 static int hci_power_control_wake(void){ 3310 3311 log_info("hci_power_control_wake"); 3312 3313 // wake on 3314 if (hci_stack->control && hci_stack->control->wake){ 3315 (*hci_stack->control->wake)(); 3316 } 3317 3318 #if 0 3319 // open low-level device 3320 int err = hci_stack->hci_transport->open(hci_stack->config); 3321 if (err){ 3322 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3323 if (hci_stack->control && hci_stack->control->off){ 3324 (*hci_stack->control->off)(); 3325 } 3326 hci_emit_hci_open_failed(); 3327 return err; 3328 } 3329 #endif 3330 3331 return 0; 3332 } 3333 3334 static void hci_power_transition_to_initializing(void){ 3335 // set up state machine 3336 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3337 hci_stack->hci_packet_buffer_reserved = 0; 3338 hci_stack->state = HCI_STATE_INITIALIZING; 3339 hci_stack->substate = HCI_INIT_SEND_RESET; 3340 } 3341 3342 int hci_power_control(HCI_POWER_MODE power_mode){ 3343 3344 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3345 3346 int err = 0; 3347 switch (hci_stack->state){ 3348 3349 case HCI_STATE_OFF: 3350 switch (power_mode){ 3351 case HCI_POWER_ON: 3352 err = hci_power_control_on(); 3353 if (err) { 3354 log_error("hci_power_control_on() error %d", err); 3355 return err; 3356 } 3357 hci_power_transition_to_initializing(); 3358 break; 3359 case HCI_POWER_OFF: 3360 // do nothing 3361 break; 3362 case HCI_POWER_SLEEP: 3363 // do nothing (with SLEEP == OFF) 3364 break; 3365 default: 3366 btstack_assert(false); 3367 break; 3368 } 3369 break; 3370 3371 case HCI_STATE_INITIALIZING: 3372 switch (power_mode){ 3373 case HCI_POWER_ON: 3374 // do nothing 3375 break; 3376 case HCI_POWER_OFF: 3377 // no connections yet, just turn it off 3378 hci_power_control_off(); 3379 break; 3380 case HCI_POWER_SLEEP: 3381 // no connections yet, just turn it off 3382 hci_power_control_sleep(); 3383 break; 3384 default: 3385 btstack_assert(false); 3386 break; 3387 } 3388 break; 3389 3390 case HCI_STATE_WORKING: 3391 switch (power_mode){ 3392 case HCI_POWER_ON: 3393 // do nothing 3394 break; 3395 case HCI_POWER_OFF: 3396 // see hci_run 3397 hci_stack->state = HCI_STATE_HALTING; 3398 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3399 break; 3400 case HCI_POWER_SLEEP: 3401 // see hci_run 3402 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3403 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3404 break; 3405 default: 3406 btstack_assert(false); 3407 break; 3408 } 3409 break; 3410 3411 case HCI_STATE_HALTING: 3412 switch (power_mode){ 3413 case HCI_POWER_ON: 3414 hci_power_transition_to_initializing(); 3415 break; 3416 case HCI_POWER_OFF: 3417 // do nothing 3418 break; 3419 case HCI_POWER_SLEEP: 3420 // see hci_run 3421 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3422 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3423 break; 3424 default: 3425 btstack_assert(false); 3426 break; 3427 } 3428 break; 3429 3430 case HCI_STATE_FALLING_ASLEEP: 3431 switch (power_mode){ 3432 case HCI_POWER_ON: 3433 3434 #ifdef HAVE_PLATFORM_IPHONE_OS 3435 // nothing to do, if H4 supports power management 3436 if (btstack_control_iphone_power_management_enabled()){ 3437 hci_stack->state = HCI_STATE_INITIALIZING; 3438 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3439 break; 3440 } 3441 #endif 3442 hci_power_transition_to_initializing(); 3443 break; 3444 case HCI_POWER_OFF: 3445 // see hci_run 3446 hci_stack->state = HCI_STATE_HALTING; 3447 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3448 break; 3449 case HCI_POWER_SLEEP: 3450 // do nothing 3451 break; 3452 default: 3453 btstack_assert(false); 3454 break; 3455 } 3456 break; 3457 3458 case HCI_STATE_SLEEPING: 3459 switch (power_mode){ 3460 case HCI_POWER_ON: 3461 3462 #ifdef HAVE_PLATFORM_IPHONE_OS 3463 // nothing to do, if H4 supports power management 3464 if (btstack_control_iphone_power_management_enabled()){ 3465 hci_stack->state = HCI_STATE_INITIALIZING; 3466 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3467 hci_update_scan_enable(); 3468 break; 3469 } 3470 #endif 3471 err = hci_power_control_wake(); 3472 if (err) return err; 3473 hci_power_transition_to_initializing(); 3474 break; 3475 case HCI_POWER_OFF: 3476 hci_stack->state = HCI_STATE_HALTING; 3477 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3478 break; 3479 case HCI_POWER_SLEEP: 3480 // do nothing 3481 break; 3482 default: 3483 btstack_assert(false); 3484 break; 3485 } 3486 break; 3487 3488 default: 3489 btstack_assert(false); 3490 break; 3491 } 3492 3493 // create internal event 3494 hci_emit_state(); 3495 3496 // trigger next/first action 3497 hci_run(); 3498 3499 return 0; 3500 } 3501 3502 3503 #ifdef ENABLE_CLASSIC 3504 3505 static void hci_update_scan_enable(void){ 3506 // 2 = page scan, 1 = inq scan 3507 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3508 hci_run(); 3509 } 3510 3511 void gap_discoverable_control(uint8_t enable){ 3512 if (enable) enable = 1; // normalize argument 3513 3514 if (hci_stack->discoverable == enable){ 3515 hci_emit_discoverable_enabled(hci_stack->discoverable); 3516 return; 3517 } 3518 3519 hci_stack->discoverable = enable; 3520 hci_update_scan_enable(); 3521 } 3522 3523 void gap_connectable_control(uint8_t enable){ 3524 if (enable) enable = 1; // normalize argument 3525 3526 // don't emit event 3527 if (hci_stack->connectable == enable) return; 3528 3529 hci_stack->connectable = enable; 3530 hci_update_scan_enable(); 3531 } 3532 #endif 3533 3534 void gap_local_bd_addr(bd_addr_t address_buffer){ 3535 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3536 } 3537 3538 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3539 static void hci_host_num_completed_packets(void){ 3540 3541 // create packet manually as arrays are not supported and num_commands should not get reduced 3542 hci_reserve_packet_buffer(); 3543 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3544 3545 uint16_t size = 0; 3546 uint16_t num_handles = 0; 3547 packet[size++] = 0x35; 3548 packet[size++] = 0x0c; 3549 size++; // skip param len 3550 size++; // skip num handles 3551 3552 // add { handle, packets } entries 3553 btstack_linked_item_t * it; 3554 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3555 hci_connection_t * connection = (hci_connection_t *) it; 3556 if (connection->num_packets_completed){ 3557 little_endian_store_16(packet, size, connection->con_handle); 3558 size += 2; 3559 little_endian_store_16(packet, size, connection->num_packets_completed); 3560 size += 2; 3561 // 3562 num_handles++; 3563 connection->num_packets_completed = 0; 3564 } 3565 } 3566 3567 packet[2] = size - 3; 3568 packet[3] = num_handles; 3569 3570 hci_stack->host_completed_packets = 0; 3571 3572 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3573 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3574 3575 // release packet buffer for synchronous transport implementations 3576 if (hci_transport_synchronous()){ 3577 hci_release_packet_buffer(); 3578 hci_emit_transport_packet_sent(); 3579 } 3580 } 3581 #endif 3582 3583 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3584 UNUSED(ds); 3585 hci_stack->substate = HCI_HALTING_CLOSE; 3586 // allow packet handlers to defer final shutdown 3587 hci_emit_state(); 3588 hci_run(); 3589 } 3590 3591 static bool hci_run_acl_fragments(void){ 3592 if (hci_stack->acl_fragmentation_total_size > 0u) { 3593 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3594 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3595 if (connection) { 3596 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3597 hci_send_acl_packet_fragments(connection); 3598 return true; 3599 } 3600 } else { 3601 // connection gone -> discard further fragments 3602 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3603 hci_stack->acl_fragmentation_total_size = 0; 3604 hci_stack->acl_fragmentation_pos = 0; 3605 } 3606 } 3607 return false; 3608 } 3609 3610 #ifdef ENABLE_CLASSIC 3611 static bool hci_run_general_gap_classic(void){ 3612 3613 // decline incoming connections 3614 if (hci_stack->decline_reason){ 3615 uint8_t reason = hci_stack->decline_reason; 3616 hci_stack->decline_reason = 0; 3617 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3618 return true; 3619 } 3620 // send scan enable 3621 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3622 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3623 hci_stack->new_scan_enable_value = 0xff; 3624 return true; 3625 } 3626 // start/stop inquiry 3627 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3628 uint8_t duration = hci_stack->inquiry_state; 3629 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3630 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3631 return true; 3632 } 3633 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3634 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3635 hci_send_cmd(&hci_inquiry_cancel); 3636 return true; 3637 } 3638 // remote name request 3639 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3640 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3641 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3642 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3643 return true; 3644 } 3645 // pairing 3646 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3647 uint8_t state = hci_stack->gap_pairing_state; 3648 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3649 switch (state){ 3650 case GAP_PAIRING_STATE_SEND_PIN: 3651 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); 3652 break; 3653 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3654 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3655 break; 3656 case GAP_PAIRING_STATE_SEND_PASSKEY: 3657 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3658 break; 3659 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3660 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3661 break; 3662 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3663 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3664 break; 3665 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3666 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3667 break; 3668 default: 3669 break; 3670 } 3671 return true; 3672 } 3673 return false; 3674 } 3675 #endif 3676 3677 #ifdef ENABLE_BLE 3678 static bool hci_run_general_gap_le(void){ 3679 3680 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3681 3682 if (hci_stack->state != HCI_STATE_WORKING) return false; 3683 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3684 3685 3686 // Phase 1: collect what to stop 3687 3688 bool scanning_stop = false; 3689 bool connecting_stop = false; 3690 bool advertising_stop = false; 3691 3692 #ifndef ENABLE_LE_CENTRAL 3693 UNUSED(scanning_stop); 3694 UNUSED(connecting_stop); 3695 #endif 3696 #ifndef ENABLE_LE_PERIPHERAL 3697 UNUSED(advertising_stop); 3698 #endif 3699 3700 // check if whitelist needs modification 3701 bool whitelist_modification_pending = false; 3702 btstack_linked_list_iterator_t lit; 3703 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3704 while (btstack_linked_list_iterator_has_next(&lit)){ 3705 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3706 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3707 whitelist_modification_pending = true; 3708 break; 3709 } 3710 } 3711 // check if resolving list needs modification 3712 bool resolving_list_modification_pending = false; 3713 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3714 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 3715 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3716 resolving_list_modification_pending = true; 3717 } 3718 #endif 3719 3720 #ifdef ENABLE_LE_CENTRAL 3721 // scanning control 3722 if (hci_stack->le_scanning_active) { 3723 // stop if: 3724 // - parameter change required 3725 // - it's disabled 3726 // - whitelist change required but used for scanning 3727 // - resolving list modified 3728 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3729 if ((hci_stack->le_scanning_param_update) || 3730 !hci_stack->le_scanning_enabled || 3731 scanning_uses_whitelist || 3732 resolving_list_modification_pending){ 3733 3734 scanning_stop = true; 3735 } 3736 } 3737 #endif 3738 3739 #ifdef ENABLE_LE_CENTRAL 3740 // connecting control 3741 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3742 // stop connecting if: 3743 // - connecting uses white and whitelist modification pending 3744 // - if it got disabled 3745 // - resolving list modified 3746 bool connecting_uses_whitelist = hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST; 3747 if ((connecting_uses_whitelist && whitelist_modification_pending) || 3748 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3749 resolving_list_modification_pending) { 3750 3751 connecting_stop = true; 3752 } 3753 } 3754 #endif 3755 3756 #ifdef ENABLE_LE_PERIPHERAL 3757 // le advertisement control 3758 if (hci_stack->le_advertisements_active){ 3759 // stop if: 3760 // - parameter change required 3761 // - it's disabled 3762 // - whitelist change required but used for advertisement filter policy 3763 // - resolving list modified 3764 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3765 if ((hci_stack->le_advertisements_todo != 0) || 3766 !hci_stack->le_advertisements_enabled_for_current_roles || 3767 (advertising_uses_whitelist & whitelist_modification_pending) || 3768 resolving_list_modification_pending) { 3769 3770 advertising_stop = true; 3771 } 3772 } 3773 #endif 3774 3775 3776 // Phase 2: stop everything that should be off during modifications 3777 3778 #ifdef ENABLE_LE_CENTRAL 3779 if (scanning_stop){ 3780 hci_stack->le_scanning_active = false; 3781 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3782 return true; 3783 } 3784 #endif 3785 3786 #ifdef ENABLE_LE_CENTRAL 3787 if (connecting_stop){ 3788 if (hci_stack->le_connecting_state != LE_CONNECTING_CANCEL){ 3789 hci_send_cmd(&hci_le_create_connection_cancel); 3790 return true; 3791 } 3792 } 3793 #endif 3794 3795 #ifdef ENABLE_LE_PERIPHERAL 3796 if (advertising_stop){ 3797 hci_stack->le_advertisements_active = false; 3798 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3799 return true; 3800 } 3801 #endif 3802 3803 // Phase 3: modify 3804 3805 #ifdef ENABLE_LE_CENTRAL 3806 if (hci_stack->le_scanning_param_update){ 3807 hci_stack->le_scanning_param_update = false; 3808 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 3809 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 3810 return true; 3811 } 3812 #endif 3813 3814 #ifdef ENABLE_LE_PERIPHERAL 3815 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3816 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3817 hci_send_cmd(&hci_le_set_advertising_parameters, 3818 hci_stack->le_advertisements_interval_min, 3819 hci_stack->le_advertisements_interval_max, 3820 hci_stack->le_advertisements_type, 3821 hci_stack->le_own_addr_type, 3822 hci_stack->le_advertisements_direct_address_type, 3823 hci_stack->le_advertisements_direct_address, 3824 hci_stack->le_advertisements_channel_map, 3825 hci_stack->le_advertisements_filter_policy); 3826 return true; 3827 } 3828 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3829 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3830 uint8_t adv_data_clean[31]; 3831 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3832 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3833 hci_stack->le_advertisements_data_len); 3834 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3835 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3836 return true; 3837 } 3838 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3839 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3840 uint8_t scan_data_clean[31]; 3841 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3842 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3843 hci_stack->le_scan_response_data_len); 3844 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3845 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3846 return true; 3847 } 3848 #endif 3849 3850 3851 #ifdef ENABLE_LE_CENTRAL 3852 // if connect with whitelist was active and is not cancelled yet, wait until next time 3853 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 3854 #endif 3855 3856 // LE Whitelist Management 3857 if (whitelist_modification_pending){ 3858 // add/remove entries 3859 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3860 while (btstack_linked_list_iterator_has_next(&lit)){ 3861 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3862 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3863 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3864 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 3865 return true; 3866 } 3867 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3868 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 3869 entry->state |= LE_WHITELIST_ON_CONTROLLER; 3870 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3871 return true; 3872 } 3873 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 3874 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3875 btstack_memory_whitelist_entry_free(entry); 3876 } 3877 } 3878 } 3879 3880 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3881 // LE Resolving List Management 3882 if (resolving_list_supported) { 3883 uint16_t i; 3884 switch (hci_stack->le_resolving_list_state) { 3885 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 3886 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 3887 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 3888 return true; 3889 case LE_RESOLVING_LIST_READ_SIZE: 3890 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 3891 hci_send_cmd(&hci_le_read_resolving_list_size); 3892 return true; 3893 case LE_RESOLVING_LIST_SEND_CLEAR: 3894 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 3895 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 3896 sizeof(hci_stack->le_resolving_list_add_entries)); 3897 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 3898 sizeof(hci_stack->le_resolving_list_remove_entries)); 3899 hci_send_cmd(&hci_le_clear_resolving_list); 3900 return true; 3901 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 3902 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 3903 uint8_t offset = i >> 3; 3904 uint8_t mask = 1 << (i & 7); 3905 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 3906 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 3907 bd_addr_t peer_identity_addreses; 3908 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3909 sm_key_t peer_irk; 3910 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3911 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3912 3913 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 3914 // trigger whitelist entry 'update' (work around for controller bug) 3915 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3916 while (btstack_linked_list_iterator_has_next(&lit)) { 3917 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 3918 if (entry->address_type != peer_identity_addr_type) continue; 3919 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 3920 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 3921 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 3922 } 3923 #endif 3924 3925 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 3926 peer_identity_addreses); 3927 return true; 3928 } 3929 3930 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 3931 3932 /* fall through */ 3933 3934 case LE_RESOLVING_LIST_ADD_ENTRIES: 3935 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 3936 uint8_t offset = i >> 3; 3937 uint8_t mask = 1 << (i & 7); 3938 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 3939 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 3940 bd_addr_t peer_identity_addreses; 3941 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3942 sm_key_t peer_irk; 3943 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3944 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3945 const uint8_t *local_irk = gap_get_persistent_irk(); 3946 // command uses format specifier 'P' that stores 16-byte value without flip 3947 uint8_t local_irk_flipped[16]; 3948 uint8_t peer_irk_flipped[16]; 3949 reverse_128(local_irk, local_irk_flipped); 3950 reverse_128(peer_irk, peer_irk_flipped); 3951 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 3952 peer_irk_flipped, local_irk_flipped); 3953 return true; 3954 } 3955 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 3956 break; 3957 3958 default: 3959 break; 3960 } 3961 } 3962 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 3963 #endif 3964 3965 // Phase 4: restore state 3966 3967 #ifdef ENABLE_LE_CENTRAL 3968 // re-start scanning 3969 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 3970 hci_stack->le_scanning_active = true; 3971 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 3972 return true; 3973 } 3974 #endif 3975 3976 #ifdef ENABLE_LE_CENTRAL 3977 // re-start connecting 3978 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 3979 bd_addr_t null_addr; 3980 memset(null_addr, 0, 6); 3981 hci_send_cmd(&hci_le_create_connection, 3982 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3983 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3984 1, // use whitelist 3985 0, // peer address type 3986 null_addr, // peer bd addr 3987 hci_stack->le_own_addr_type, // our addr type: 3988 hci_stack->le_connection_interval_min, // conn interval min 3989 hci_stack->le_connection_interval_max, // conn interval max 3990 hci_stack->le_connection_latency, // conn latency 3991 hci_stack->le_supervision_timeout, // conn latency 3992 hci_stack->le_minimum_ce_length, // min ce length 3993 hci_stack->le_maximum_ce_length // max ce length 3994 ); 3995 return true; 3996 } 3997 #endif 3998 3999 #ifdef ENABLE_LE_PERIPHERAL 4000 // re-start advertising 4001 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4002 // check if advertisements should be enabled given 4003 hci_stack->le_advertisements_active = true; 4004 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4005 return true; 4006 } 4007 #endif 4008 4009 return false; 4010 } 4011 #endif 4012 4013 static bool hci_run_general_pending_commands(void){ 4014 btstack_linked_item_t * it; 4015 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4016 hci_connection_t * connection = (hci_connection_t *) it; 4017 4018 switch(connection->state){ 4019 case SEND_CREATE_CONNECTION: 4020 switch(connection->address_type){ 4021 #ifdef ENABLE_CLASSIC 4022 case BD_ADDR_TYPE_ACL: 4023 log_info("sending hci_create_connection"); 4024 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4025 break; 4026 #endif 4027 default: 4028 #ifdef ENABLE_BLE 4029 #ifdef ENABLE_LE_CENTRAL 4030 log_info("sending hci_le_create_connection"); 4031 hci_send_cmd(&hci_le_create_connection, 4032 hci_stack->le_connection_scan_interval, // conn scan interval 4033 hci_stack->le_connection_scan_window, // conn scan windows 4034 0, // don't use whitelist 4035 connection->address_type, // peer address type 4036 connection->address, // peer bd addr 4037 hci_stack->le_own_addr_type, // our addr type: 4038 hci_stack->le_connection_interval_min, // conn interval min 4039 hci_stack->le_connection_interval_max, // conn interval max 4040 hci_stack->le_connection_latency, // conn latency 4041 hci_stack->le_supervision_timeout, // conn latency 4042 hci_stack->le_minimum_ce_length, // min ce length 4043 hci_stack->le_maximum_ce_length // max ce length 4044 ); 4045 connection->state = SENT_CREATE_CONNECTION; 4046 #endif 4047 #endif 4048 break; 4049 } 4050 return true; 4051 4052 #ifdef ENABLE_CLASSIC 4053 case RECEIVED_CONNECTION_REQUEST: 4054 connection->role = HCI_ROLE_SLAVE; 4055 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4056 log_info("sending hci_accept_connection_request"); 4057 connection->state = ACCEPTED_CONNECTION_REQUEST; 4058 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4059 } 4060 return true; 4061 #endif 4062 4063 #ifdef ENABLE_BLE 4064 #ifdef ENABLE_LE_CENTRAL 4065 case SEND_CANCEL_CONNECTION: 4066 connection->state = SENT_CANCEL_CONNECTION; 4067 hci_send_cmd(&hci_le_create_connection_cancel); 4068 return true; 4069 #endif 4070 #endif 4071 case SEND_DISCONNECT: 4072 connection->state = SENT_DISCONNECT; 4073 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4074 return true; 4075 4076 default: 4077 break; 4078 } 4079 4080 // no further commands if connection is about to get shut down 4081 if (connection->state == SENT_DISCONNECT) continue; 4082 4083 if (connection->authentication_flags & READ_RSSI){ 4084 connectionClearAuthenticationFlags(connection, READ_RSSI); 4085 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4086 return true; 4087 } 4088 4089 #ifdef ENABLE_CLASSIC 4090 4091 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4092 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4093 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4094 return true; 4095 } 4096 4097 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4098 log_info("responding to link key request"); 4099 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4100 4101 link_key_t link_key; 4102 link_key_type_t link_key_type; 4103 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4104 4105 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4106 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4107 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4108 if (sc_downgrade){ 4109 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4110 connection->state = SENT_DISCONNECT; 4111 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4112 return true; 4113 } 4114 4115 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4116 if (have_link_key && security_level_sufficient){ 4117 connection->link_key_type = link_key_type; 4118 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4119 } else { 4120 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4121 } 4122 return true; 4123 } 4124 4125 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4126 log_info("denying to pin request"); 4127 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4128 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4129 return true; 4130 } 4131 4132 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4133 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4134 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 4135 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 4136 // tweak authentication requirements 4137 uint8_t authreq = hci_stack->ssp_authentication_requirement; 4138 if (connection->bonding_flags & BONDING_DEDICATED){ 4139 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4140 } 4141 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4142 authreq |= 1; 4143 } 4144 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 4145 } else { 4146 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4147 } 4148 return true; 4149 } 4150 4151 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4152 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4153 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4154 return true; 4155 } 4156 4157 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4158 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4159 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4160 return true; 4161 } 4162 4163 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4164 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4165 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4166 return true; 4167 } 4168 4169 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4170 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4171 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4172 return true; 4173 } 4174 4175 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4176 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4177 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4178 return true; 4179 } 4180 4181 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4182 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4183 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4184 connection->state = SENT_DISCONNECT; 4185 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4186 return true; 4187 } 4188 4189 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4190 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4191 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4192 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4193 return true; 4194 } 4195 4196 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4197 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4198 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4199 return true; 4200 } 4201 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4202 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4203 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4204 return true; 4205 } 4206 #endif 4207 4208 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4209 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4210 if (connection->state != SENT_DISCONNECT){ 4211 connection->state = SENT_DISCONNECT; 4212 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4213 return true; 4214 } 4215 } 4216 4217 #ifdef ENABLE_CLASSIC 4218 uint16_t sniff_min_interval; 4219 switch (connection->sniff_min_interval){ 4220 case 0: 4221 break; 4222 case 0xffff: 4223 connection->sniff_min_interval = 0; 4224 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4225 return true; 4226 default: 4227 sniff_min_interval = connection->sniff_min_interval; 4228 connection->sniff_min_interval = 0; 4229 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4230 return true; 4231 } 4232 4233 if (connection->request_role != HCI_ROLE_INVALID){ 4234 hci_role_t role = connection->request_role; 4235 connection->request_role = HCI_ROLE_INVALID; 4236 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4237 return true; 4238 } 4239 #endif 4240 4241 #ifdef ENABLE_BLE 4242 switch (connection->le_con_parameter_update_state){ 4243 // response to L2CAP CON PARAMETER UPDATE REQUEST 4244 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4245 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4246 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4247 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4248 0x0000, 0xffff); 4249 return true; 4250 case CON_PARAMETER_UPDATE_REPLY: 4251 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4252 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4253 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4254 0x0000, 0xffff); 4255 return true; 4256 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4257 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4258 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4259 return true; 4260 default: 4261 break; 4262 } 4263 if (connection->le_phy_update_all_phys != 0xffu){ 4264 uint8_t all_phys = connection->le_phy_update_all_phys; 4265 connection->le_phy_update_all_phys = 0xff; 4266 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); 4267 return true; 4268 } 4269 #endif 4270 } 4271 return false; 4272 } 4273 4274 static void hci_run(void){ 4275 4276 bool done; 4277 4278 // send continuation fragments first, as they block the prepared packet buffer 4279 done = hci_run_acl_fragments(); 4280 if (done) return; 4281 4282 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4283 // send host num completed packets next as they don't require num_cmd_packets > 0 4284 if (!hci_can_send_comand_packet_transport()) return; 4285 if (hci_stack->host_completed_packets){ 4286 hci_host_num_completed_packets(); 4287 return; 4288 } 4289 #endif 4290 4291 if (!hci_can_send_command_packet_now()) return; 4292 4293 // global/non-connection oriented commands 4294 4295 4296 #ifdef ENABLE_CLASSIC 4297 // general gap classic 4298 done = hci_run_general_gap_classic(); 4299 if (done) return; 4300 #endif 4301 4302 #ifdef ENABLE_BLE 4303 // general gap le 4304 done = hci_run_general_gap_le(); 4305 if (done) return; 4306 #endif 4307 4308 // send pending HCI commands 4309 done = hci_run_general_pending_commands(); 4310 if (done) return; 4311 4312 // stack state sub statemachines 4313 hci_connection_t * connection; 4314 switch (hci_stack->state){ 4315 case HCI_STATE_INITIALIZING: 4316 hci_initializing_run(); 4317 break; 4318 4319 case HCI_STATE_HALTING: 4320 4321 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4322 switch (hci_stack->substate){ 4323 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4324 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4325 4326 #ifdef ENABLE_BLE 4327 #ifdef ENABLE_LE_CENTRAL 4328 // free whitelist entries 4329 { 4330 btstack_linked_list_iterator_t lit; 4331 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4332 while (btstack_linked_list_iterator_has_next(&lit)){ 4333 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4334 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4335 btstack_memory_whitelist_entry_free(entry); 4336 } 4337 } 4338 #endif 4339 #endif 4340 // close all open connections 4341 connection = (hci_connection_t *) hci_stack->connections; 4342 if (connection){ 4343 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4344 if (!hci_can_send_command_packet_now()) return; 4345 4346 // check state 4347 if (connection->state == SENT_DISCONNECT) return; 4348 connection->state = SENT_DISCONNECT; 4349 4350 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4351 4352 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4353 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4354 4355 // ... which would be ignored anyway as we shutdown (free) the connection now 4356 hci_shutdown_connection(connection); 4357 4358 // finally, send the disconnect command 4359 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4360 return; 4361 } 4362 4363 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4364 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4365 log_info("HCI_STATE_HALTING: wait 50 ms"); 4366 hci_stack->substate = HCI_HALTING_W4_TIMER; 4367 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4368 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4369 btstack_run_loop_add_timer(&hci_stack->timeout); 4370 break; 4371 } 4372 4373 /* fall through */ 4374 4375 case HCI_HALTING_CLOSE: 4376 log_info("HCI_STATE_HALTING, calling off"); 4377 4378 // switch mode 4379 hci_power_control_off(); 4380 4381 log_info("HCI_STATE_HALTING, emitting state"); 4382 hci_emit_state(); 4383 log_info("HCI_STATE_HALTING, done"); 4384 break; 4385 4386 case HCI_HALTING_W4_TIMER: 4387 // keep waiting 4388 4389 break; 4390 default: 4391 break; 4392 } 4393 4394 break; 4395 4396 case HCI_STATE_FALLING_ASLEEP: 4397 switch(hci_stack->substate) { 4398 case HCI_FALLING_ASLEEP_DISCONNECT: 4399 log_info("HCI_STATE_FALLING_ASLEEP"); 4400 // close all open connections 4401 connection = (hci_connection_t *) hci_stack->connections; 4402 4403 #ifdef HAVE_PLATFORM_IPHONE_OS 4404 // don't close connections, if H4 supports power management 4405 if (btstack_control_iphone_power_management_enabled()){ 4406 connection = NULL; 4407 } 4408 #endif 4409 if (connection){ 4410 4411 // send disconnect 4412 if (!hci_can_send_command_packet_now()) return; 4413 4414 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4415 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4416 4417 // send disconnected event right away - causes higher layer connections to get closed, too. 4418 hci_shutdown_connection(connection); 4419 return; 4420 } 4421 4422 if (hci_classic_supported()){ 4423 // disable page and inquiry scan 4424 if (!hci_can_send_command_packet_now()) return; 4425 4426 log_info("HCI_STATE_HALTING, disabling inq scans"); 4427 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4428 4429 // continue in next sub state 4430 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4431 break; 4432 } 4433 4434 /* fall through */ 4435 4436 case HCI_FALLING_ASLEEP_COMPLETE: 4437 log_info("HCI_STATE_HALTING, calling sleep"); 4438 #ifdef HAVE_PLATFORM_IPHONE_OS 4439 // don't actually go to sleep, if H4 supports power management 4440 if (btstack_control_iphone_power_management_enabled()){ 4441 // SLEEP MODE reached 4442 hci_stack->state = HCI_STATE_SLEEPING; 4443 hci_emit_state(); 4444 break; 4445 } 4446 #endif 4447 // switch mode 4448 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4449 hci_emit_state(); 4450 break; 4451 4452 default: 4453 break; 4454 } 4455 break; 4456 4457 default: 4458 break; 4459 } 4460 } 4461 4462 int hci_send_cmd_packet(uint8_t *packet, int size){ 4463 // house-keeping 4464 4465 #ifdef ENABLE_CLASSIC 4466 bd_addr_t addr; 4467 hci_connection_t * conn; 4468 #endif 4469 #ifdef ENABLE_LE_CENTRAL 4470 uint8_t initiator_filter_policy; 4471 #endif 4472 4473 uint16_t opcode = little_endian_read_16(packet, 0); 4474 switch (opcode) { 4475 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4476 hci_stack->loopback_mode = packet[3]; 4477 break; 4478 4479 #ifdef ENABLE_CLASSIC 4480 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4481 reverse_bd_addr(&packet[3], addr); 4482 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4483 4484 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4485 if (!conn) { 4486 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4487 if (!conn) { 4488 // notify client that alloc failed 4489 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4490 return -1; // packet not sent to controller 4491 } 4492 conn->state = SEND_CREATE_CONNECTION; 4493 conn->role = HCI_ROLE_MASTER; 4494 } 4495 log_info("conn state %u", conn->state); 4496 switch (conn->state) { 4497 // if connection active exists 4498 case OPEN: 4499 // and OPEN, emit connection complete command 4500 hci_emit_connection_complete(addr, conn->con_handle, 0); 4501 return -1; // packet not sent to controller 4502 case RECEIVED_DISCONNECTION_COMPLETE: 4503 // create connection triggered in disconnect complete event, let's do it now 4504 break; 4505 case SEND_CREATE_CONNECTION: 4506 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4507 break; 4508 default: 4509 // otherwise, just ignore as it is already in the open process 4510 return -1; // packet not sent to controller 4511 } 4512 conn->state = SENT_CREATE_CONNECTION; 4513 4514 // track outgoing connection 4515 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4516 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4517 break; 4518 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4519 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4520 break; 4521 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4522 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4523 break; 4524 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4525 if (hci_stack->link_key_db) { 4526 reverse_bd_addr(&packet[3], addr); 4527 hci_stack->link_key_db->delete_link_key(addr); 4528 } 4529 break; 4530 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4531 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4532 reverse_bd_addr(&packet[3], addr); 4533 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4534 if (conn) { 4535 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4536 } 4537 break; 4538 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4539 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4540 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4541 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4542 reverse_bd_addr(&packet[3], addr); 4543 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4544 if (conn) { 4545 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4546 } 4547 break; 4548 4549 #ifdef ENABLE_SCO_OVER_HCI 4550 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4551 // setup_synchronous_connection? Voice setting at offset 22 4552 // TODO: compare to current setting if sco connection already active 4553 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4554 break; 4555 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4556 // accept_synchronus_connection? Voice setting at offset 18 4557 // TODO: compare to current setting if sco connection already active 4558 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4559 break; 4560 #endif 4561 #endif 4562 4563 #ifdef ENABLE_BLE 4564 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4565 hci_stack->le_random_address_set = 1; 4566 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4567 break; 4568 #ifdef ENABLE_LE_PERIPHERAL 4569 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4570 hci_stack->le_advertisements_active = packet[3] != 0; 4571 break; 4572 #endif 4573 #ifdef ENABLE_LE_CENTRAL 4574 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4575 // white list used? 4576 initiator_filter_policy = packet[7]; 4577 switch (initiator_filter_policy) { 4578 case 0: 4579 // whitelist not used 4580 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4581 break; 4582 case 1: 4583 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4584 break; 4585 default: 4586 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4587 break; 4588 } 4589 // track outgoing connection 4590 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4591 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4592 break; 4593 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4594 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4595 break; 4596 #endif 4597 #endif 4598 default: 4599 break; 4600 } 4601 4602 hci_stack->num_cmd_packets--; 4603 4604 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4605 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4606 } 4607 4608 // disconnect because of security block 4609 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4610 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4611 if (!connection) return; 4612 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4613 } 4614 4615 4616 // Configure Secure Simple Pairing 4617 4618 #ifdef ENABLE_CLASSIC 4619 4620 // enable will enable SSP during init 4621 void gap_ssp_set_enable(int enable){ 4622 hci_stack->ssp_enable = enable; 4623 } 4624 4625 static int hci_local_ssp_activated(void){ 4626 return gap_ssp_supported() && hci_stack->ssp_enable; 4627 } 4628 4629 // if set, BTstack will respond to io capability request using authentication requirement 4630 void gap_ssp_set_io_capability(int io_capability){ 4631 hci_stack->ssp_io_capability = io_capability; 4632 } 4633 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4634 hci_stack->ssp_authentication_requirement = authentication_requirement; 4635 } 4636 4637 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4638 void gap_ssp_set_auto_accept(int auto_accept){ 4639 hci_stack->ssp_auto_accept = auto_accept; 4640 } 4641 4642 void gap_secure_connections_enable(bool enable){ 4643 hci_stack->secure_connections_enable = enable; 4644 } 4645 4646 #endif 4647 4648 // va_list part of hci_send_cmd 4649 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4650 if (!hci_can_send_command_packet_now()){ 4651 log_error("hci_send_cmd called but cannot send packet now"); 4652 return 0; 4653 } 4654 4655 // for HCI INITIALIZATION 4656 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4657 hci_stack->last_cmd_opcode = cmd->opcode; 4658 4659 hci_reserve_packet_buffer(); 4660 uint8_t * packet = hci_stack->hci_packet_buffer; 4661 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4662 int err = hci_send_cmd_packet(packet, size); 4663 4664 // release packet buffer on error or for synchronous transport implementations 4665 if ((err < 0) || hci_transport_synchronous()){ 4666 hci_release_packet_buffer(); 4667 hci_emit_transport_packet_sent(); 4668 } 4669 4670 return err; 4671 } 4672 4673 /** 4674 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4675 */ 4676 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4677 va_list argptr; 4678 va_start(argptr, cmd); 4679 int res = hci_send_cmd_va_arg(cmd, argptr); 4680 va_end(argptr); 4681 return res; 4682 } 4683 4684 // Create various non-HCI events. 4685 // TODO: generalize, use table similar to hci_create_command 4686 4687 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4688 // dump packet 4689 if (dump) { 4690 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4691 } 4692 4693 // dispatch to all event handlers 4694 btstack_linked_list_iterator_t it; 4695 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4696 while (btstack_linked_list_iterator_has_next(&it)){ 4697 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4698 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4699 } 4700 } 4701 4702 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4703 if (!hci_stack->acl_packet_handler) return; 4704 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4705 } 4706 4707 #ifdef ENABLE_CLASSIC 4708 static void hci_notify_if_sco_can_send_now(void){ 4709 // notify SCO sender if waiting 4710 if (!hci_stack->sco_waiting_for_can_send_now) return; 4711 if (hci_can_send_sco_packet_now()){ 4712 hci_stack->sco_waiting_for_can_send_now = 0; 4713 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4714 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4715 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4716 } 4717 } 4718 4719 // parsing end emitting has been merged to reduce code size 4720 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4721 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4722 4723 uint8_t * eir_data; 4724 ad_context_t context; 4725 const uint8_t * name; 4726 uint8_t name_len; 4727 4728 if (size < 3) return; 4729 4730 int event_type = hci_event_packet_get_type(packet); 4731 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4732 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4733 4734 switch (event_type){ 4735 case HCI_EVENT_INQUIRY_RESULT: 4736 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4737 if (size != (3 + (num_responses * 14))) return; 4738 break; 4739 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4740 if (size != 257) return; 4741 if (num_responses != 1) return; 4742 break; 4743 default: 4744 return; 4745 } 4746 4747 // event[1] is set at the end 4748 int i; 4749 for (i=0; i<num_responses;i++){ 4750 memset(event, 0, sizeof(event)); 4751 event[0] = GAP_EVENT_INQUIRY_RESULT; 4752 uint8_t event_size = 18; // if name is not set by EIR 4753 4754 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4755 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4756 (void)memcpy(&event[9], 4757 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4758 3); // class of device 4759 (void)memcpy(&event[12], 4760 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4761 2); // clock offset 4762 4763 switch (event_type){ 4764 case HCI_EVENT_INQUIRY_RESULT: 4765 // 14,15,16,17 = 0, size 18 4766 break; 4767 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4768 event[14] = 1; 4769 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4770 // 16,17 = 0, size 18 4771 break; 4772 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4773 event[14] = 1; 4774 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4775 // EIR packets only contain a single inquiry response 4776 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4777 name = NULL; 4778 // Iterate over EIR data 4779 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4780 uint8_t data_type = ad_iterator_get_data_type(&context); 4781 uint8_t data_size = ad_iterator_get_data_len(&context); 4782 const uint8_t * data = ad_iterator_get_data(&context); 4783 // Prefer Complete Local Name over Shortend Local Name 4784 switch (data_type){ 4785 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4786 if (name) continue; 4787 /* fall through */ 4788 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4789 name = data; 4790 name_len = data_size; 4791 break; 4792 default: 4793 break; 4794 } 4795 } 4796 if (name){ 4797 event[16] = 1; 4798 // truncate name if needed 4799 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4800 event[17] = len; 4801 (void)memcpy(&event[18], name, len); 4802 event_size += len; 4803 } 4804 break; 4805 default: 4806 return; 4807 } 4808 event[1] = event_size - 2; 4809 hci_emit_event(event, event_size, 1); 4810 } 4811 } 4812 #endif 4813 4814 void hci_emit_state(void){ 4815 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4816 uint8_t event[3]; 4817 event[0] = BTSTACK_EVENT_STATE; 4818 event[1] = sizeof(event) - 2u; 4819 event[2] = hci_stack->state; 4820 hci_emit_event(event, sizeof(event), 1); 4821 } 4822 4823 #ifdef ENABLE_CLASSIC 4824 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4825 uint8_t event[13]; 4826 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4827 event[1] = sizeof(event) - 2; 4828 event[2] = status; 4829 little_endian_store_16(event, 3, con_handle); 4830 reverse_bd_addr(address, &event[5]); 4831 event[11] = 1; // ACL connection 4832 event[12] = 0; // encryption disabled 4833 hci_emit_event(event, sizeof(event), 1); 4834 } 4835 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4836 if (disable_l2cap_timeouts) return; 4837 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4838 uint8_t event[4]; 4839 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4840 event[1] = sizeof(event) - 2; 4841 little_endian_store_16(event, 2, conn->con_handle); 4842 hci_emit_event(event, sizeof(event), 1); 4843 } 4844 #endif 4845 4846 #ifdef ENABLE_BLE 4847 #ifdef ENABLE_LE_CENTRAL 4848 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){ 4849 uint8_t event[21]; 4850 event[0] = HCI_EVENT_LE_META; 4851 event[1] = sizeof(event) - 2u; 4852 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4853 event[3] = status; 4854 little_endian_store_16(event, 4, con_handle); 4855 event[6] = 0; // TODO: role 4856 event[7] = address_type; 4857 reverse_bd_addr(address, &event[8]); 4858 little_endian_store_16(event, 14, 0); // interval 4859 little_endian_store_16(event, 16, 0); // latency 4860 little_endian_store_16(event, 18, 0); // supervision timeout 4861 event[20] = 0; // master clock accuracy 4862 hci_emit_event(event, sizeof(event), 1); 4863 } 4864 #endif 4865 #endif 4866 4867 static void hci_emit_transport_packet_sent(void){ 4868 // notify upper stack that it might be possible to send again 4869 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4870 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4871 } 4872 4873 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4874 uint8_t event[6]; 4875 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4876 event[1] = sizeof(event) - 2u; 4877 event[2] = 0; // status = OK 4878 little_endian_store_16(event, 3, con_handle); 4879 event[5] = reason; 4880 hci_emit_event(event, sizeof(event), 1); 4881 } 4882 4883 static void hci_emit_nr_connections_changed(void){ 4884 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4885 uint8_t event[3]; 4886 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4887 event[1] = sizeof(event) - 2u; 4888 event[2] = nr_hci_connections(); 4889 hci_emit_event(event, sizeof(event), 1); 4890 } 4891 4892 static void hci_emit_hci_open_failed(void){ 4893 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4894 uint8_t event[2]; 4895 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4896 event[1] = sizeof(event) - 2u; 4897 hci_emit_event(event, sizeof(event), 1); 4898 } 4899 4900 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4901 log_info("hci_emit_dedicated_bonding_result %u ", status); 4902 uint8_t event[9]; 4903 int pos = 0; 4904 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4905 event[pos++] = sizeof(event) - 2u; 4906 event[pos++] = status; 4907 reverse_bd_addr(address, &event[pos]); 4908 hci_emit_event(event, sizeof(event), 1); 4909 } 4910 4911 4912 #ifdef ENABLE_CLASSIC 4913 4914 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4915 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4916 uint8_t event[5]; 4917 int pos = 0; 4918 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4919 event[pos++] = sizeof(event) - 2; 4920 little_endian_store_16(event, 2, con_handle); 4921 pos += 2; 4922 event[pos++] = level; 4923 hci_emit_event(event, sizeof(event), 1); 4924 } 4925 4926 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4927 if (!connection) return LEVEL_0; 4928 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4929 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 4930 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4931 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4932 // LEVEL 4 always requires 128 bit encrytion key size 4933 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4934 security_level = LEVEL_3; 4935 } 4936 return security_level; 4937 } 4938 4939 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4940 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4941 uint8_t event[3]; 4942 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4943 event[1] = sizeof(event) - 2; 4944 event[2] = enabled; 4945 hci_emit_event(event, sizeof(event), 1); 4946 } 4947 4948 // query if remote side supports eSCO 4949 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4950 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4951 if (!connection) return 0; 4952 return (connection->remote_supported_features[0] & 1) != 0; 4953 } 4954 4955 static bool hci_ssp_supported(hci_connection_t * connection){ 4956 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4957 return (connection->bonding_flags & mask) == mask; 4958 } 4959 4960 // query if remote side supports SSP 4961 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4962 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4963 if (!connection) return 0; 4964 return hci_ssp_supported(connection) ? 1 : 0; 4965 } 4966 4967 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4968 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4969 } 4970 4971 // GAP API 4972 /** 4973 * @bbrief enable/disable bonding. default is enabled 4974 * @praram enabled 4975 */ 4976 void gap_set_bondable_mode(int enable){ 4977 hci_stack->bondable = enable ? 1 : 0; 4978 } 4979 /** 4980 * @brief Get bondable mode. 4981 * @return 1 if bondable 4982 */ 4983 int gap_get_bondable_mode(void){ 4984 return hci_stack->bondable; 4985 } 4986 4987 /** 4988 * @brief map link keys to security levels 4989 */ 4990 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4991 switch (link_key_type){ 4992 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4993 return LEVEL_4; 4994 case COMBINATION_KEY: 4995 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4996 return LEVEL_3; 4997 default: 4998 return LEVEL_2; 4999 } 5000 } 5001 5002 /** 5003 * @brief map link keys to secure connection yes/no 5004 */ 5005 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5006 switch (link_key_type){ 5007 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5008 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5009 return 1; 5010 default: 5011 return 0; 5012 } 5013 } 5014 5015 /** 5016 * @brief map link keys to authenticated 5017 */ 5018 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5019 switch (link_key_type){ 5020 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5021 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5022 return 1; 5023 default: 5024 return 0; 5025 } 5026 } 5027 5028 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5029 log_info("gap_mitm_protection_required_for_security_level %u", level); 5030 return level > LEVEL_2; 5031 } 5032 5033 /** 5034 * @brief get current security level 5035 */ 5036 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5037 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5038 if (!connection) return LEVEL_0; 5039 return gap_security_level_for_connection(connection); 5040 } 5041 5042 /** 5043 * @brief request connection to device to 5044 * @result GAP_AUTHENTICATION_RESULT 5045 */ 5046 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5047 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5048 if (!connection){ 5049 hci_emit_security_level(con_handle, LEVEL_0); 5050 return; 5051 } 5052 5053 btstack_assert(hci_is_le_connection(connection) == false); 5054 5055 gap_security_level_t current_level = gap_security_level(con_handle); 5056 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5057 requested_level, connection->requested_security_level, current_level); 5058 5059 // assumption: earlier requested security higher than current level => security request is active 5060 if (current_level < connection->requested_security_level){ 5061 if (connection->requested_security_level < requested_level){ 5062 // increase requested level as new level is higher 5063 5064 // TODO: handle re-authentication when done 5065 5066 connection->requested_security_level = requested_level; 5067 } 5068 return; 5069 } 5070 5071 // no request active, notify if security sufficient 5072 if (requested_level <= current_level){ 5073 hci_emit_security_level(con_handle, current_level); 5074 return; 5075 } 5076 5077 // store request 5078 connection->requested_security_level = requested_level; 5079 5080 // start to authenticate connection if authentication not already active 5081 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5082 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5083 hci_run(); 5084 } 5085 5086 /** 5087 * @brief start dedicated bonding with device. disconnect after bonding 5088 * @param device 5089 * @param request MITM protection 5090 * @result GAP_DEDICATED_BONDING_COMPLETE 5091 */ 5092 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5093 5094 // create connection state machine 5095 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5096 5097 if (!connection){ 5098 return BTSTACK_MEMORY_ALLOC_FAILED; 5099 } 5100 5101 // delete linkn key 5102 gap_drop_link_key_for_bd_addr(device); 5103 5104 // configure LEVEL_2/3, dedicated bonding 5105 connection->state = SEND_CREATE_CONNECTION; 5106 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5107 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5108 connection->bonding_flags = BONDING_DEDICATED; 5109 5110 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5111 5112 // handle: connnection failure (connection complete != ok) 5113 // handle: authentication failure 5114 // handle: disconnect on done 5115 5116 hci_run(); 5117 5118 return 0; 5119 } 5120 #endif 5121 5122 void gap_set_local_name(const char * local_name){ 5123 hci_stack->local_name = local_name; 5124 } 5125 5126 5127 #ifdef ENABLE_BLE 5128 5129 #ifdef ENABLE_LE_CENTRAL 5130 void gap_start_scan(void){ 5131 hci_stack->le_scanning_enabled = true; 5132 hci_run(); 5133 } 5134 5135 void gap_stop_scan(void){ 5136 hci_stack->le_scanning_enabled = false; 5137 hci_run(); 5138 } 5139 5140 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5141 hci_stack->le_scan_type = scan_type; 5142 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5143 hci_stack->le_scan_interval = scan_interval; 5144 hci_stack->le_scan_window = scan_window; 5145 hci_stack->le_scanning_param_update = true; 5146 hci_run(); 5147 } 5148 5149 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5150 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5151 } 5152 5153 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5154 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5155 if (!conn){ 5156 // disallow if le connection is already outgoing 5157 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5158 log_error("le connection already active"); 5159 return ERROR_CODE_COMMAND_DISALLOWED; 5160 } 5161 5162 log_info("gap_connect: no connection exists yet, creating context"); 5163 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5164 if (!conn){ 5165 // notify client that alloc failed 5166 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5167 log_info("gap_connect: failed to alloc hci_connection_t"); 5168 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5169 } 5170 5171 // set le connecting state 5172 if (hci_is_le_connection_type(addr_type)){ 5173 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5174 } 5175 5176 conn->state = SEND_CREATE_CONNECTION; 5177 log_info("gap_connect: send create connection next"); 5178 hci_run(); 5179 return ERROR_CODE_SUCCESS; 5180 } 5181 5182 if (!hci_is_le_connection(conn) || 5183 (conn->state == SEND_CREATE_CONNECTION) || 5184 (conn->state == SENT_CREATE_CONNECTION)) { 5185 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5186 log_error("gap_connect: classic connection or connect is already being created"); 5187 return GATT_CLIENT_IN_WRONG_STATE; 5188 } 5189 5190 // check if connection was just disconnected 5191 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5192 log_info("gap_connect: send create connection (again)"); 5193 conn->state = SEND_CREATE_CONNECTION; 5194 hci_run(); 5195 return ERROR_CODE_SUCCESS; 5196 } 5197 5198 log_info("gap_connect: context exists with state %u", conn->state); 5199 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5200 hci_run(); 5201 return ERROR_CODE_SUCCESS; 5202 } 5203 5204 // @assumption: only a single outgoing LE Connection exists 5205 static hci_connection_t * gap_get_outgoing_connection(void){ 5206 btstack_linked_item_t *it; 5207 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5208 hci_connection_t * conn = (hci_connection_t *) it; 5209 if (!hci_is_le_connection(conn)) continue; 5210 switch (conn->state){ 5211 case SEND_CREATE_CONNECTION: 5212 case SENT_CREATE_CONNECTION: 5213 case SENT_CANCEL_CONNECTION: 5214 return conn; 5215 default: 5216 break; 5217 }; 5218 } 5219 return NULL; 5220 } 5221 5222 uint8_t gap_connect_cancel(void){ 5223 hci_connection_t * conn = gap_get_outgoing_connection(); 5224 if (!conn) return 0; 5225 switch (conn->state){ 5226 case SEND_CREATE_CONNECTION: 5227 // skip sending create connection and emit event instead 5228 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5229 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5230 btstack_memory_hci_connection_free( conn ); 5231 break; 5232 case SENT_CREATE_CONNECTION: 5233 // request to send cancel connection 5234 conn->state = SEND_CANCEL_CONNECTION; 5235 hci_run(); 5236 break; 5237 default: 5238 break; 5239 } 5240 return 0; 5241 } 5242 #endif 5243 5244 #ifdef ENABLE_LE_CENTRAL 5245 /** 5246 * @brief Set connection parameters for outgoing connections 5247 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5248 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5249 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5250 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5251 * @param conn_latency, default: 4 5252 * @param supervision_timeout (unit: 10ms), default: 720 ms 5253 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5254 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5255 */ 5256 5257 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5258 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5259 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5260 hci_stack->le_connection_scan_interval = conn_scan_interval; 5261 hci_stack->le_connection_scan_window = conn_scan_window; 5262 hci_stack->le_connection_interval_min = conn_interval_min; 5263 hci_stack->le_connection_interval_max = conn_interval_max; 5264 hci_stack->le_connection_latency = conn_latency; 5265 hci_stack->le_supervision_timeout = supervision_timeout; 5266 hci_stack->le_minimum_ce_length = min_ce_length; 5267 hci_stack->le_maximum_ce_length = max_ce_length; 5268 } 5269 #endif 5270 5271 /** 5272 * @brief Updates the connection parameters for a given LE connection 5273 * @param handle 5274 * @param conn_interval_min (unit: 1.25ms) 5275 * @param conn_interval_max (unit: 1.25ms) 5276 * @param conn_latency 5277 * @param supervision_timeout (unit: 10ms) 5278 * @returns 0 if ok 5279 */ 5280 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5281 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5282 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5283 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5284 connection->le_conn_interval_min = conn_interval_min; 5285 connection->le_conn_interval_max = conn_interval_max; 5286 connection->le_conn_latency = conn_latency; 5287 connection->le_supervision_timeout = supervision_timeout; 5288 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5289 hci_run(); 5290 return 0; 5291 } 5292 5293 /** 5294 * @brief Request an update of the connection parameter for a given LE connection 5295 * @param handle 5296 * @param conn_interval_min (unit: 1.25ms) 5297 * @param conn_interval_max (unit: 1.25ms) 5298 * @param conn_latency 5299 * @param supervision_timeout (unit: 10ms) 5300 * @returns 0 if ok 5301 */ 5302 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5303 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5304 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5305 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5306 connection->le_conn_interval_min = conn_interval_min; 5307 connection->le_conn_interval_max = conn_interval_max; 5308 connection->le_conn_latency = conn_latency; 5309 connection->le_supervision_timeout = supervision_timeout; 5310 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5311 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5312 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5313 return 0; 5314 } 5315 5316 #ifdef ENABLE_LE_PERIPHERAL 5317 5318 /** 5319 * @brief Set Advertisement Data 5320 * @param advertising_data_length 5321 * @param advertising_data (max 31 octets) 5322 * @note data is not copied, pointer has to stay valid 5323 */ 5324 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5325 hci_stack->le_advertisements_data_len = advertising_data_length; 5326 hci_stack->le_advertisements_data = advertising_data; 5327 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5328 hci_run(); 5329 } 5330 5331 /** 5332 * @brief Set Scan Response Data 5333 * @param advertising_data_length 5334 * @param advertising_data (max 31 octets) 5335 * @note data is not copied, pointer has to stay valid 5336 */ 5337 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5338 hci_stack->le_scan_response_data_len = scan_response_data_length; 5339 hci_stack->le_scan_response_data = scan_response_data; 5340 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5341 hci_run(); 5342 } 5343 5344 /** 5345 * @brief Set Advertisement Parameters 5346 * @param adv_int_min 5347 * @param adv_int_max 5348 * @param adv_type 5349 * @param direct_address_type 5350 * @param direct_address 5351 * @param channel_map 5352 * @param filter_policy 5353 * 5354 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5355 */ 5356 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5357 uint8_t direct_address_typ, bd_addr_t direct_address, 5358 uint8_t channel_map, uint8_t filter_policy) { 5359 5360 hci_stack->le_advertisements_interval_min = adv_int_min; 5361 hci_stack->le_advertisements_interval_max = adv_int_max; 5362 hci_stack->le_advertisements_type = adv_type; 5363 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5364 hci_stack->le_advertisements_channel_map = channel_map; 5365 hci_stack->le_advertisements_filter_policy = filter_policy; 5366 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5367 6); 5368 5369 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5370 hci_run(); 5371 } 5372 5373 /** 5374 * @brief Enable/Disable Advertisements 5375 * @param enabled 5376 */ 5377 void gap_advertisements_enable(int enabled){ 5378 hci_stack->le_advertisements_enabled = enabled != 0; 5379 hci_update_advertisements_enabled_for_current_roles(); 5380 hci_run(); 5381 } 5382 5383 #endif 5384 5385 void hci_le_set_own_address_type(uint8_t own_address_type){ 5386 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5387 if (own_address_type == hci_stack->le_own_addr_type) return; 5388 hci_stack->le_own_addr_type = own_address_type; 5389 5390 #ifdef ENABLE_LE_PERIPHERAL 5391 // update advertisement parameters, too 5392 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5393 hci_run(); 5394 #endif 5395 #ifdef ENABLE_LE_CENTRAL 5396 // note: we don't update scan parameters or modify ongoing connection attempts 5397 #endif 5398 } 5399 5400 #endif 5401 5402 uint8_t gap_disconnect(hci_con_handle_t handle){ 5403 hci_connection_t * conn = hci_connection_for_handle(handle); 5404 if (!conn){ 5405 hci_emit_disconnection_complete(handle, 0); 5406 return 0; 5407 } 5408 // ignore if already disconnected 5409 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5410 return 0; 5411 } 5412 conn->state = SEND_DISCONNECT; 5413 hci_run(); 5414 return 0; 5415 } 5416 5417 int gap_read_rssi(hci_con_handle_t con_handle){ 5418 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5419 if (hci_connection == NULL) return 0; 5420 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5421 hci_run(); 5422 return 1; 5423 } 5424 5425 /** 5426 * @brief Get connection type 5427 * @param con_handle 5428 * @result connection_type 5429 */ 5430 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5431 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5432 if (!conn) return GAP_CONNECTION_INVALID; 5433 switch (conn->address_type){ 5434 case BD_ADDR_TYPE_LE_PUBLIC: 5435 case BD_ADDR_TYPE_LE_RANDOM: 5436 return GAP_CONNECTION_LE; 5437 case BD_ADDR_TYPE_SCO: 5438 return GAP_CONNECTION_SCO; 5439 case BD_ADDR_TYPE_ACL: 5440 return GAP_CONNECTION_ACL; 5441 default: 5442 return GAP_CONNECTION_INVALID; 5443 } 5444 } 5445 5446 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5447 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5448 if (!conn) return HCI_ROLE_INVALID; 5449 return (hci_role_t) conn->role; 5450 } 5451 5452 5453 #ifdef ENABLE_CLASSIC 5454 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5455 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5456 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5457 conn->request_role = role; 5458 hci_run(); 5459 return ERROR_CODE_SUCCESS; 5460 } 5461 #endif 5462 5463 #ifdef ENABLE_BLE 5464 5465 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){ 5466 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5467 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5468 5469 conn->le_phy_update_all_phys = all_phys; 5470 conn->le_phy_update_tx_phys = tx_phys; 5471 conn->le_phy_update_rx_phys = rx_phys; 5472 conn->le_phy_update_phy_options = phy_options; 5473 5474 hci_run(); 5475 5476 return 0; 5477 } 5478 5479 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5480 // check if already in list 5481 btstack_linked_list_iterator_t it; 5482 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5483 while (btstack_linked_list_iterator_has_next(&it)) { 5484 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5485 if (entry->address_type != address_type) { 5486 continue; 5487 } 5488 if (memcmp(entry->address, address, 6) != 0) { 5489 continue; 5490 } 5491 // disallow if already scheduled to add 5492 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5493 return ERROR_CODE_COMMAND_DISALLOWED; 5494 } 5495 // still on controller, but scheduled to remove -> re-add 5496 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5497 return ERROR_CODE_SUCCESS; 5498 } 5499 // alloc and add to list 5500 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5501 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5502 entry->address_type = address_type; 5503 (void)memcpy(entry->address, address, 6); 5504 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5505 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5506 return ERROR_CODE_SUCCESS; 5507 } 5508 5509 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5510 btstack_linked_list_iterator_t it; 5511 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5512 while (btstack_linked_list_iterator_has_next(&it)){ 5513 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5514 if (entry->address_type != address_type) { 5515 continue; 5516 } 5517 if (memcmp(entry->address, address, 6) != 0) { 5518 continue; 5519 } 5520 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5521 // remove from controller if already present 5522 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5523 } else { 5524 // directly remove entry from whitelist 5525 btstack_linked_list_iterator_remove(&it); 5526 btstack_memory_whitelist_entry_free(entry); 5527 } 5528 return ERROR_CODE_SUCCESS; 5529 } 5530 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5531 } 5532 5533 static void hci_whitelist_clear(void){ 5534 btstack_linked_list_iterator_t it; 5535 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5536 while (btstack_linked_list_iterator_has_next(&it)){ 5537 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5538 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5539 // remove from controller if already present 5540 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5541 continue; 5542 } 5543 // directly remove entry from whitelist 5544 btstack_linked_list_iterator_remove(&it); 5545 btstack_memory_whitelist_entry_free(entry); 5546 } 5547 } 5548 5549 /** 5550 * @brief Clear Whitelist 5551 * @returns 0 if ok 5552 */ 5553 uint8_t gap_whitelist_clear(void){ 5554 hci_whitelist_clear(); 5555 hci_run(); 5556 return ERROR_CODE_SUCCESS; 5557 } 5558 5559 /** 5560 * @brief Add Device to Whitelist 5561 * @param address_typ 5562 * @param address 5563 * @returns 0 if ok 5564 */ 5565 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5566 uint8_t status = hci_whitelist_add(address_type, address); 5567 if (status){ 5568 return status; 5569 } 5570 hci_run(); 5571 return ERROR_CODE_SUCCESS; 5572 } 5573 5574 /** 5575 * @brief Remove Device from Whitelist 5576 * @param address_typ 5577 * @param address 5578 * @returns 0 if ok 5579 */ 5580 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5581 uint8_t status = hci_whitelist_remove(address_type, address); 5582 if (status){ 5583 return status; 5584 } 5585 hci_run(); 5586 return ERROR_CODE_SUCCESS; 5587 } 5588 5589 #ifdef ENABLE_LE_CENTRAL 5590 /** 5591 * @brief Connect with Whitelist 5592 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5593 * @returns - if ok 5594 */ 5595 uint8_t gap_connect_with_whitelist(void){ 5596 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5597 return ERROR_CODE_COMMAND_DISALLOWED; 5598 } 5599 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5600 hci_run(); 5601 return ERROR_CODE_SUCCESS; 5602 } 5603 5604 /** 5605 * @brief Auto Connection Establishment - Start Connecting to device 5606 * @param address_typ 5607 * @param address 5608 * @returns 0 if ok 5609 */ 5610 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5611 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5612 return ERROR_CODE_COMMAND_DISALLOWED; 5613 } 5614 5615 uint8_t status = hci_whitelist_add(address_type, address); 5616 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5617 return status; 5618 } 5619 5620 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5621 5622 hci_run(); 5623 return ERROR_CODE_SUCCESS; 5624 } 5625 5626 /** 5627 * @brief Auto Connection Establishment - Stop Connecting to device 5628 * @param address_typ 5629 * @param address 5630 * @returns 0 if ok 5631 */ 5632 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5633 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5634 return ERROR_CODE_COMMAND_DISALLOWED; 5635 } 5636 5637 hci_whitelist_remove(address_type, address); 5638 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5639 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5640 } 5641 hci_run(); 5642 return 0; 5643 } 5644 5645 /** 5646 * @brief Auto Connection Establishment - Stop everything 5647 * @note Convenience function to stop all active auto connection attempts 5648 */ 5649 uint8_t gap_auto_connection_stop_all(void){ 5650 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5651 return ERROR_CODE_COMMAND_DISALLOWED; 5652 } 5653 hci_whitelist_clear(); 5654 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5655 hci_run(); 5656 return ERROR_CODE_SUCCESS; 5657 } 5658 5659 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5660 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5661 if (!conn) return 0; 5662 return conn->le_connection_interval; 5663 } 5664 #endif 5665 #endif 5666 5667 #ifdef ENABLE_CLASSIC 5668 /** 5669 * @brief Set Extended Inquiry Response data 5670 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5671 * @note has to be done before stack starts up 5672 */ 5673 void gap_set_extended_inquiry_response(const uint8_t * data){ 5674 hci_stack->eir_data = data; 5675 } 5676 5677 /** 5678 * @brief Start GAP Classic Inquiry 5679 * @param duration in 1.28s units 5680 * @return 0 if ok 5681 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5682 */ 5683 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5684 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5685 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5686 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5687 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5688 } 5689 hci_stack->inquiry_state = duration_in_1280ms_units; 5690 hci_run(); 5691 return 0; 5692 } 5693 5694 /** 5695 * @brief Stop GAP Classic Inquiry 5696 * @returns 0 if ok 5697 */ 5698 int gap_inquiry_stop(void){ 5699 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5700 // emit inquiry complete event, before it even started 5701 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5702 hci_emit_event(event, sizeof(event), 1); 5703 return 0; 5704 } 5705 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5706 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5707 hci_run(); 5708 return 0; 5709 } 5710 5711 5712 /** 5713 * @brief Remote Name Request 5714 * @param addr 5715 * @param page_scan_repetition_mode 5716 * @param clock_offset only used when bit 15 is set 5717 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5718 */ 5719 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5720 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5721 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5722 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5723 hci_stack->remote_name_clock_offset = clock_offset; 5724 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5725 hci_run(); 5726 return 0; 5727 } 5728 5729 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 5730 hci_stack->gap_pairing_state = state; 5731 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5732 hci_run(); 5733 return 0; 5734 } 5735 5736 /** 5737 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5738 * @param addr 5739 * @param pin_data 5740 * @param pin_len 5741 * @return 0 if ok 5742 */ 5743 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5744 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5745 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5746 hci_stack->gap_pairing_pin_len = pin_len; 5747 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5748 } 5749 5750 /** 5751 * @brief Legacy Pairing Pin Code Response 5752 * @param addr 5753 * @param pin 5754 * @return 0 if ok 5755 */ 5756 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 5757 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5758 } 5759 5760 /** 5761 * @brief Abort Legacy Pairing 5762 * @param addr 5763 * @param pin 5764 * @return 0 if ok 5765 */ 5766 int gap_pin_code_negative(bd_addr_t addr){ 5767 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5768 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5769 } 5770 5771 /** 5772 * @brief SSP Passkey Response 5773 * @param addr 5774 * @param passkey 5775 * @return 0 if ok 5776 */ 5777 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 5778 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5779 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5780 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5781 } 5782 5783 /** 5784 * @brief Abort SSP Passkey Entry/Pairing 5785 * @param addr 5786 * @param pin 5787 * @return 0 if ok 5788 */ 5789 int gap_ssp_passkey_negative(const bd_addr_t addr){ 5790 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5791 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5792 } 5793 5794 /** 5795 * @brief Accept SSP Numeric Comparison 5796 * @param addr 5797 * @param passkey 5798 * @return 0 if ok 5799 */ 5800 int gap_ssp_confirmation_response(const bd_addr_t addr){ 5801 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5802 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5803 } 5804 5805 /** 5806 * @brief Abort SSP Numeric Comparison/Pairing 5807 * @param addr 5808 * @param pin 5809 * @return 0 if ok 5810 */ 5811 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 5812 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5813 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5814 } 5815 5816 /** 5817 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5818 * @param inquiry_mode see bluetooth_defines.h 5819 */ 5820 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5821 hci_stack->inquiry_mode = mode; 5822 } 5823 5824 /** 5825 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5826 */ 5827 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5828 hci_stack->sco_voice_setting = voice_setting; 5829 } 5830 5831 /** 5832 * @brief Get SCO Voice Setting 5833 * @return current voice setting 5834 */ 5835 uint16_t hci_get_sco_voice_setting(void){ 5836 return hci_stack->sco_voice_setting; 5837 } 5838 5839 static int hci_have_usb_transport(void){ 5840 if (!hci_stack->hci_transport) return 0; 5841 const char * transport_name = hci_stack->hci_transport->name; 5842 if (!transport_name) return 0; 5843 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5844 } 5845 5846 /** @brief Get SCO packet length for current SCO Voice setting 5847 * @note Using SCO packets of the exact length is required for USB transfer 5848 * @return Length of SCO packets in bytes (not audio frames) 5849 */ 5850 int hci_get_sco_packet_length(void){ 5851 int sco_packet_length = 0; 5852 5853 #ifdef ENABLE_SCO_OVER_HCI 5854 5855 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5856 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5857 5858 if (hci_have_usb_transport()){ 5859 // see Core Spec for H2 USB Transfer. 5860 // 3 byte SCO header + 24 bytes per connection 5861 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5862 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5863 } else { 5864 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5865 sco_packet_length = 3 + 60 * multiplier; 5866 // assert that it still fits inside an SCO buffer 5867 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5868 sco_packet_length = 3 + 60; 5869 } 5870 } 5871 #endif 5872 return sco_packet_length; 5873 } 5874 5875 /** 5876 * @brief Sets the master/slave policy 5877 * @param policy (0: attempt to become master, 1: let connecting device decide) 5878 */ 5879 void hci_set_master_slave_policy(uint8_t policy){ 5880 hci_stack->master_slave_policy = policy; 5881 } 5882 5883 #endif 5884 5885 HCI_STATE hci_get_state(void){ 5886 return hci_stack->state; 5887 } 5888 5889 #ifdef ENABLE_CLASSIC 5890 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5891 hci_stack->gap_classic_accept_callback = accept_callback; 5892 } 5893 #endif 5894 5895 /** 5896 * @brief Set callback for Bluetooth Hardware Error 5897 */ 5898 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5899 hci_stack->hardware_error_callback = fn; 5900 } 5901 5902 void hci_disconnect_all(void){ 5903 btstack_linked_list_iterator_t it; 5904 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5905 while (btstack_linked_list_iterator_has_next(&it)){ 5906 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5907 if (con->state == SENT_DISCONNECT) continue; 5908 con->state = SEND_DISCONNECT; 5909 } 5910 hci_run(); 5911 } 5912 5913 uint16_t hci_get_manufacturer(void){ 5914 return hci_stack->manufacturer; 5915 } 5916 5917 #ifdef ENABLE_BLE 5918 5919 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5920 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5921 if (!hci_con) return NULL; 5922 return &hci_con->sm_connection; 5923 } 5924 5925 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5926 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5927 5928 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5929 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5930 if (hci_connection == NULL) return 0; 5931 if (hci_is_le_connection(hci_connection)){ 5932 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5933 if (sm_conn->sm_connection_encrypted) { 5934 return sm_conn->sm_actual_encryption_key_size; 5935 } 5936 } 5937 #ifdef ENABLE_CLASSIC 5938 else { 5939 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5940 return hci_connection->encryption_key_size; 5941 } 5942 } 5943 #endif 5944 return 0; 5945 } 5946 5947 int gap_authenticated(hci_con_handle_t con_handle){ 5948 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5949 if (hci_connection == NULL) return 0; 5950 5951 switch (hci_connection->address_type){ 5952 case BD_ADDR_TYPE_LE_PUBLIC: 5953 case BD_ADDR_TYPE_LE_RANDOM: 5954 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5955 return hci_connection->sm_connection.sm_connection_authenticated; 5956 #ifdef ENABLE_CLASSIC 5957 case BD_ADDR_TYPE_SCO: 5958 case BD_ADDR_TYPE_ACL: 5959 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5960 #endif 5961 default: 5962 return 0; 5963 } 5964 } 5965 5966 int gap_secure_connection(hci_con_handle_t con_handle){ 5967 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5968 if (hci_connection == NULL) return 0; 5969 5970 switch (hci_connection->address_type){ 5971 case BD_ADDR_TYPE_LE_PUBLIC: 5972 case BD_ADDR_TYPE_LE_RANDOM: 5973 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5974 return hci_connection->sm_connection.sm_connection_sc; 5975 #ifdef ENABLE_CLASSIC 5976 case BD_ADDR_TYPE_SCO: 5977 case BD_ADDR_TYPE_ACL: 5978 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5979 #endif 5980 default: 5981 return 0; 5982 } 5983 } 5984 5985 bool gap_bonded(hci_con_handle_t con_handle){ 5986 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5987 if (hci_connection == NULL) return 0; 5988 5989 #ifdef ENABLE_CLASSIC 5990 link_key_t link_key; 5991 link_key_type_t link_key_type; 5992 #endif 5993 switch (hci_connection->address_type){ 5994 case BD_ADDR_TYPE_LE_PUBLIC: 5995 case BD_ADDR_TYPE_LE_RANDOM: 5996 return hci_connection->sm_connection.sm_le_db_index >= 0; 5997 #ifdef ENABLE_CLASSIC 5998 case BD_ADDR_TYPE_SCO: 5999 case BD_ADDR_TYPE_ACL: 6000 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6001 #endif 6002 default: 6003 return false; 6004 } 6005 } 6006 6007 6008 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6009 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6010 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6011 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6012 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6013 return sm_conn->sm_connection_authorization_state; 6014 } 6015 #endif 6016 6017 #ifdef ENABLE_CLASSIC 6018 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){ 6019 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6020 if (!conn) return GAP_CONNECTION_INVALID; 6021 conn->sniff_min_interval = sniff_min_interval; 6022 conn->sniff_max_interval = sniff_max_interval; 6023 conn->sniff_attempt = sniff_attempt; 6024 conn->sniff_timeout = sniff_timeout; 6025 hci_run(); 6026 return 0; 6027 } 6028 6029 /** 6030 * @brief Exit Sniff mode 6031 * @param con_handle 6032 @ @return 0 if ok 6033 */ 6034 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6035 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6036 if (!conn) return GAP_CONNECTION_INVALID; 6037 conn->sniff_min_interval = 0xffff; 6038 hci_run(); 6039 return 0; 6040 } 6041 #endif 6042 6043 void hci_halting_defer(void){ 6044 if (hci_stack->state != HCI_STATE_HALTING) return; 6045 switch (hci_stack->substate){ 6046 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6047 case HCI_HALTING_CLOSE: 6048 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6049 break; 6050 default: 6051 break; 6052 } 6053 } 6054 6055 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6056 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6057 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6058 if (le_device_db_index >= le_device_db_max_count()) return; 6059 uint8_t offset = le_device_db_index >> 3; 6060 uint8_t mask = 1 << (le_device_db_index & 7); 6061 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6062 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6063 // note: go back to remove entries, otherwise, a remove + add will skip the add 6064 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6065 } 6066 } 6067 6068 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6069 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6070 if (le_device_db_index >= le_device_db_max_count()) return; 6071 uint8_t offset = le_device_db_index >> 3; 6072 uint8_t mask = 1 << (le_device_db_index & 7); 6073 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6074 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6075 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6076 } 6077 } 6078 6079 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6080 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6081 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6082 } 6083 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6084 // restart le resolving list update 6085 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6086 } 6087 return ERROR_CODE_SUCCESS; 6088 } 6089 #endif 6090 6091 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6092 void hci_setup_test_connections_fuzz(void){ 6093 hci_connection_t * conn; 6094 6095 // default address: 66:55:44:33:00:01 6096 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6097 6098 // setup Controller info 6099 hci_stack->num_cmd_packets = 255; 6100 hci_stack->acl_packets_total_num = 255; 6101 6102 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6103 addr[5] = 0x01; 6104 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6105 conn->con_handle = addr[5]; 6106 conn->role = HCI_ROLE_SLAVE; 6107 conn->state = RECEIVED_CONNECTION_REQUEST; 6108 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6109 6110 // setup incoming Classic SCO connection with con handle 0x0002 6111 addr[5] = 0x02; 6112 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6113 conn->con_handle = addr[5]; 6114 conn->role = HCI_ROLE_SLAVE; 6115 conn->state = RECEIVED_CONNECTION_REQUEST; 6116 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6117 6118 // setup ready Classic ACL connection with con handle 0x0003 6119 addr[5] = 0x03; 6120 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6121 conn->con_handle = addr[5]; 6122 conn->role = HCI_ROLE_SLAVE; 6123 conn->state = OPEN; 6124 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6125 6126 // setup ready Classic SCO connection with con handle 0x0004 6127 addr[5] = 0x04; 6128 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6129 conn->con_handle = addr[5]; 6130 conn->role = HCI_ROLE_SLAVE; 6131 conn->state = OPEN; 6132 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6133 6134 // setup ready LE ACL connection with con handle 0x005 and public address 6135 addr[5] = 0x05; 6136 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6137 conn->con_handle = addr[5]; 6138 conn->role = HCI_ROLE_SLAVE; 6139 conn->state = OPEN; 6140 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6141 } 6142 6143 void hci_free_connections_fuzz(void){ 6144 btstack_linked_list_iterator_t it; 6145 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6146 while (btstack_linked_list_iterator_has_next(&it)){ 6147 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6148 btstack_linked_list_iterator_remove(&it); 6149 btstack_memory_hci_connection_free(con); 6150 } 6151 } 6152 void hci_simulate_working_fuzz(void){ 6153 hci_init_done(); 6154 hci_stack->num_cmd_packets = 255; 6155 } 6156 #endif 6157