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 bool more_fragments = false; 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 = true; 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)", (int) 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)", (int) 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 bool send_cmd = false; 1283 switch (hci_stack->chipset_result){ 1284 case BTSTACK_CHIPSET_VALID_COMMAND: 1285 send_cmd = true; 1286 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1287 break; 1288 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1289 send_cmd = true; 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 #ifdef ENABLE_SCO_OVER_PCM 1514 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1515 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1516 log_info("BCM: Config PCM interface for I2S"); 1517 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 4); 1518 break; 1519 #endif 1520 #endif 1521 1522 #ifdef ENABLE_BLE 1523 // LE INIT 1524 case HCI_INIT_LE_READ_BUFFER_SIZE: 1525 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1526 hci_send_cmd(&hci_le_read_buffer_size); 1527 break; 1528 case HCI_INIT_LE_SET_EVENT_MASK: 1529 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1530 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1531 break; 1532 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1533 // LE Supported Host = 1, Simultaneous Host = 0 1534 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1535 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1536 break; 1537 #endif 1538 1539 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1540 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1541 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1542 hci_send_cmd(&hci_le_read_maximum_data_length); 1543 break; 1544 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1545 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1546 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1547 break; 1548 #endif 1549 1550 #ifdef ENABLE_LE_CENTRAL 1551 case HCI_INIT_READ_WHITE_LIST_SIZE: 1552 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1553 hci_send_cmd(&hci_le_read_white_list_size); 1554 break; 1555 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1556 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1557 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); 1558 break; 1559 #endif 1560 default: 1561 return; 1562 } 1563 } 1564 1565 static void hci_init_done(void){ 1566 // done. tell the app 1567 log_info("hci_init_done -> HCI_STATE_WORKING"); 1568 hci_stack->state = HCI_STATE_WORKING; 1569 hci_emit_state(); 1570 hci_run(); 1571 } 1572 1573 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1574 bool command_completed = false; 1575 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1576 uint16_t opcode = little_endian_read_16(packet,3); 1577 if (opcode == hci_stack->last_cmd_opcode){ 1578 command_completed = true; 1579 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1580 } else { 1581 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1582 } 1583 } 1584 1585 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1586 uint8_t status = packet[2]; 1587 uint16_t opcode = little_endian_read_16(packet,4); 1588 if (opcode == hci_stack->last_cmd_opcode){ 1589 if (status){ 1590 command_completed = true; 1591 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1592 } else { 1593 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1594 } 1595 } else { 1596 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1597 } 1598 } 1599 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1600 // Vendor == CSR 1601 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1602 // TODO: track actual command 1603 command_completed = true; 1604 } 1605 1606 // Vendor == Toshiba 1607 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1608 // TODO: track actual command 1609 command_completed = true; 1610 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1611 hci_stack->num_cmd_packets = 1; 1612 } 1613 #endif 1614 1615 return command_completed; 1616 } 1617 1618 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1619 1620 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1621 1622 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1623 1624 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1625 1626 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1627 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1628 // 1629 // HCI Reset 1630 // Timeout 100 ms 1631 // HCI Reset 1632 // Command Complete Reset 1633 // HCI Read Local Version Information 1634 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1635 // hang... 1636 // 1637 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1638 if (!command_completed 1639 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1640 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1641 1642 uint16_t opcode = little_endian_read_16(packet,3); 1643 if (opcode == hci_reset.opcode){ 1644 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1645 return; 1646 } 1647 } 1648 1649 // CSR & H5 1650 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1651 if (!command_completed 1652 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1653 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1654 1655 uint16_t opcode = little_endian_read_16(packet,3); 1656 if (opcode == hci_reset.opcode){ 1657 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1658 return; 1659 } 1660 } 1661 1662 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1663 // fix: Correct substate and behave as command below 1664 if (command_completed){ 1665 switch (hci_stack->substate){ 1666 case HCI_INIT_SEND_RESET: 1667 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1668 break; 1669 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1670 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1671 break; 1672 default: 1673 break; 1674 } 1675 } 1676 1677 #endif 1678 1679 if (!command_completed) return; 1680 1681 bool need_baud_change = false; 1682 bool need_addr_change = false; 1683 1684 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1685 need_baud_change = hci_stack->config 1686 && hci_stack->chipset 1687 && hci_stack->chipset->set_baudrate_command 1688 && hci_stack->hci_transport->set_baudrate 1689 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1690 1691 need_addr_change = hci_stack->custom_bd_addr_set 1692 && hci_stack->chipset 1693 && hci_stack->chipset->set_bd_addr_command; 1694 #endif 1695 1696 switch(hci_stack->substate){ 1697 1698 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1699 case HCI_INIT_SEND_RESET: 1700 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1701 // fix: just correct substate and behave as command below 1702 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1703 btstack_run_loop_remove_timer(&hci_stack->timeout); 1704 break; 1705 case HCI_INIT_W4_SEND_RESET: 1706 btstack_run_loop_remove_timer(&hci_stack->timeout); 1707 break; 1708 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1709 log_info("Received local name, need baud change %d", (int) need_baud_change); 1710 if (need_baud_change){ 1711 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1712 return; 1713 } 1714 // skip baud change 1715 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1716 return; 1717 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1718 // for STLC2500D, baud rate change already happened. 1719 // for others, baud rate gets changed now 1720 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1721 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1722 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1723 hci_stack->hci_transport->set_baudrate(baud_rate); 1724 } 1725 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1726 return; 1727 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1728 btstack_run_loop_remove_timer(&hci_stack->timeout); 1729 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1730 return; 1731 case HCI_INIT_W4_CUSTOM_INIT: 1732 // repeat custom init 1733 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1734 return; 1735 #else 1736 case HCI_INIT_W4_SEND_RESET: 1737 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1738 return ; 1739 #endif 1740 1741 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1742 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1743 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1744 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1745 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1746 return; 1747 } 1748 if (need_addr_change){ 1749 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1750 return; 1751 } 1752 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1753 return; 1754 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1755 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1756 if (need_baud_change){ 1757 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1758 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1759 hci_stack->hci_transport->set_baudrate(baud_rate); 1760 } 1761 if (need_addr_change){ 1762 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1763 return; 1764 } 1765 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1766 return; 1767 case HCI_INIT_W4_SET_BD_ADDR: 1768 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1769 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1770 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1771 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1772 return; 1773 } 1774 // skipping st warm boot 1775 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1776 return; 1777 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1778 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1779 return; 1780 #endif 1781 case HCI_INIT_W4_READ_BD_ADDR: 1782 // only read buffer size if supported 1783 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1784 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1785 return; 1786 } 1787 // skipping read buffer size 1788 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1789 return; 1790 case HCI_INIT_W4_SET_EVENT_MASK: 1791 // skip Classic init commands for LE only chipsets 1792 if (!hci_classic_supported()){ 1793 #ifdef ENABLE_BLE 1794 if (hci_le_supported()){ 1795 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1796 return; 1797 } 1798 #endif 1799 log_error("Neither BR/EDR nor LE supported"); 1800 hci_init_done(); 1801 return; 1802 } 1803 if (!gap_ssp_supported()){ 1804 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1805 return; 1806 } 1807 break; 1808 #ifdef ENABLE_BLE 1809 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1810 // skip write le host if not supported (e.g. on LE only EM9301) 1811 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1812 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1813 return; 1814 1815 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1816 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1817 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1818 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1819 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1820 return; 1821 } 1822 // explicit fall through to reduce repetitions 1823 1824 #ifdef ENABLE_LE_CENTRAL 1825 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1826 #else 1827 hci_init_done(); 1828 #endif 1829 return; 1830 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1831 1832 #endif /* ENABLE_BLE */ 1833 1834 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1835 // skip write secure connections host support if not supported or disabled 1836 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1837 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1838 return; 1839 } 1840 break; 1841 1842 #ifdef ENABLE_SCO_OVER_HCI 1843 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1844 // skip write synchronous flow control if not supported 1845 if (hci_stack->local_supported_commands[0] & 0x04) break; 1846 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1847 1848 /* fall through */ 1849 1850 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1851 // skip write default erroneous data reporting if not supported 1852 if (hci_stack->local_supported_commands[0] & 0x08) break; 1853 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1854 1855 /* fall through */ 1856 1857 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1858 // skip bcm set sco pcm config on non-Broadcom chipsets 1859 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1860 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1861 1862 /* fall through */ 1863 1864 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1865 if (!hci_le_supported()){ 1866 // SKIP LE init for Classic only configuration 1867 hci_init_done(); 1868 return; 1869 } 1870 break; 1871 1872 #else /* !ENABLE_SCO_OVER_HCI */ 1873 1874 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1875 #ifdef ENABLE_SCO_OVER_PCM 1876 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1877 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1878 return; 1879 } 1880 #endif 1881 /* fall through */ 1882 1883 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1884 #ifdef ENABLE_BLE 1885 if (hci_le_supported()){ 1886 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1887 return; 1888 } 1889 #endif 1890 // SKIP LE init for Classic only configuration 1891 hci_init_done(); 1892 return; 1893 #endif /* ENABLE_SCO_OVER_HCI */ 1894 1895 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1896 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1897 // Response to command before init done state -> init done 1898 case (HCI_INIT_DONE-1): 1899 hci_init_done(); 1900 return; 1901 #endif 1902 1903 default: 1904 break; 1905 } 1906 hci_initializing_next_state(); 1907 } 1908 1909 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1910 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1911 bd_addr_t bd_address; 1912 (void)memcpy(&bd_address, conn->address, 6); 1913 1914 #ifdef ENABLE_CLASSIC 1915 // cache needed data 1916 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1917 #endif 1918 1919 // connection failed, remove entry 1920 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1921 btstack_memory_hci_connection_free( conn ); 1922 1923 #ifdef ENABLE_CLASSIC 1924 // notify client if dedicated bonding 1925 if (notify_dedicated_bonding_failed){ 1926 log_info("hci notify_dedicated_bonding_failed"); 1927 hci_emit_dedicated_bonding_result(bd_address, status); 1928 } 1929 1930 // if authentication error, also delete link key 1931 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1932 gap_drop_link_key_for_bd_addr(bd_address); 1933 } 1934 #else 1935 UNUSED(status); 1936 #endif 1937 } 1938 1939 #ifdef ENABLE_CLASSIC 1940 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1941 // SSP Controller 1942 if (features[6] & (1 << 3)){ 1943 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1944 } 1945 // eSCO 1946 if (features[3] & (1<<7)){ 1947 conn->remote_supported_features[0] |= 1; 1948 } 1949 // Extended features 1950 if (features[7] & (1<<7)){ 1951 conn->remote_supported_features[0] |= 2; 1952 } 1953 } 1954 1955 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1956 // SSP Host 1957 if (features[0] & (1 << 0)){ 1958 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1959 } 1960 // SC Host 1961 if (features[0] & (1 << 3)){ 1962 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1963 } 1964 } 1965 1966 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1967 // SC Controller 1968 if (features[1] & (1 << 0)){ 1969 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1970 } 1971 } 1972 1973 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1974 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1975 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1976 if (conn->bonding_flags & BONDING_DEDICATED){ 1977 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1978 } 1979 } 1980 #endif 1981 1982 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1983 // handle BT initialization 1984 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1985 hci_initializing_event_handler(packet, size); 1986 } 1987 1988 // help with BT sleep 1989 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1990 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1991 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1992 hci_initializing_next_state(); 1993 } 1994 } 1995 1996 #ifdef ENABLE_CLASSIC 1997 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 1998 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1999 conn->encryption_key_size = encryption_key_size; 2000 2001 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 2002 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2003 return; 2004 } 2005 2006 // Request Authentication if not already done 2007 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2008 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2009 } 2010 #endif 2011 2012 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2013 UNUSED(size); 2014 2015 uint16_t manufacturer; 2016 #ifdef ENABLE_CLASSIC 2017 hci_con_handle_t handle; 2018 hci_connection_t * conn; 2019 uint8_t status; 2020 #endif 2021 // get num cmd packets - limit to 1 to reduce complexity 2022 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2023 2024 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2025 switch (opcode){ 2026 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2027 if (packet[5]) break; 2028 // terminate, name 248 chars 2029 packet[6+248] = 0; 2030 log_info("local name: %s", &packet[6]); 2031 break; 2032 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2033 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2034 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2035 uint16_t acl_len = little_endian_read_16(packet, 6); 2036 uint16_t sco_len = packet[8]; 2037 2038 // determine usable ACL/SCO payload size 2039 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2040 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2041 2042 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2043 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2044 2045 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2046 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2047 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2048 } 2049 break; 2050 case HCI_OPCODE_HCI_READ_RSSI: 2051 if (packet[5] == ERROR_CODE_SUCCESS){ 2052 uint8_t event[5]; 2053 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2054 event[1] = 3; 2055 (void)memcpy(&event[2], &packet[6], 3); 2056 hci_emit_event(event, sizeof(event), 1); 2057 } 2058 break; 2059 #ifdef ENABLE_BLE 2060 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2061 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2062 hci_stack->le_acl_packets_total_num = packet[8]; 2063 // determine usable ACL payload size 2064 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2065 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2066 } 2067 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2068 break; 2069 #endif 2070 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2071 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2072 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2073 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2074 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); 2075 break; 2076 #endif 2077 #ifdef ENABLE_LE_CENTRAL 2078 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2079 hci_stack->le_whitelist_capacity = packet[6]; 2080 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2081 break; 2082 #endif 2083 case HCI_OPCODE_HCI_READ_BD_ADDR: 2084 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2085 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)); 2086 #ifdef ENABLE_CLASSIC 2087 if (hci_stack->link_key_db){ 2088 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2089 } 2090 #endif 2091 break; 2092 #ifdef ENABLE_CLASSIC 2093 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2094 hci_emit_discoverable_enabled(hci_stack->discoverable); 2095 break; 2096 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2097 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2098 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2099 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2100 hci_emit_event(event, sizeof(event), 1); 2101 } 2102 break; 2103 #endif 2104 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2105 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2106 2107 #ifdef ENABLE_CLASSIC 2108 // determine usable ACL packet types based on host buffer size and supported features 2109 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2110 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2111 #endif 2112 // Classic/LE 2113 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2114 break; 2115 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2116 manufacturer = little_endian_read_16(packet, 10); 2117 // map Cypress to Broadcom 2118 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2119 log_info("Treat Cypress as Broadcom"); 2120 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2121 little_endian_store_16(packet, 10, manufacturer); 2122 } 2123 hci_stack->manufacturer = manufacturer; 2124 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2125 break; 2126 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2127 hci_stack->local_supported_commands[0] = 2128 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2129 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2130 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2131 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2132 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2133 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2134 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2135 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2136 hci_stack->local_supported_commands[1] = 2137 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2138 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2139 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2140 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2141 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2142 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2143 break; 2144 #ifdef ENABLE_CLASSIC 2145 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2146 if (packet[5]) return; 2147 hci_stack->synchronous_flow_control_enabled = 1; 2148 break; 2149 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2150 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2151 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2152 conn = hci_connection_for_handle(handle); 2153 if (conn != NULL) { 2154 uint8_t key_size = 0; 2155 if (status == 0){ 2156 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2157 log_info("Handle %04x key Size: %u", handle, key_size); 2158 } else { 2159 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2160 } 2161 hci_handle_read_encryption_key_size_complete(conn, key_size); 2162 } 2163 break; 2164 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2165 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2166 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2167 uint8_t event[67]; 2168 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2169 event[1] = 65; 2170 (void)memset(&event[2], 0, 65); 2171 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2172 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2173 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2174 event[2] = 3; 2175 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2176 } else { 2177 event[2] = 1; 2178 } 2179 } 2180 hci_emit_event(event, sizeof(event), 0); 2181 break; 2182 } 2183 #endif 2184 #endif 2185 default: 2186 break; 2187 } 2188 } 2189 2190 #ifdef ENABLE_BLE 2191 static void event_handle_le_connection_complete(const uint8_t * packet){ 2192 bd_addr_t addr; 2193 bd_addr_type_t addr_type; 2194 hci_connection_t * conn; 2195 2196 // Connection management 2197 reverse_bd_addr(&packet[8], addr); 2198 addr_type = (bd_addr_type_t)packet[7]; 2199 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2200 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2201 2202 #ifdef ENABLE_LE_CENTRAL 2203 // handle error: error is reported only to the initiator -> outgoing connection 2204 if (packet[3]){ 2205 2206 // handle cancelled outgoing connection 2207 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2208 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2209 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2210 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2211 // whitelist connect 2212 if (hci_is_le_connection_type(addr_type)){ 2213 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2214 } 2215 // get outgoing connection conn struct for direct connect 2216 conn = gap_get_outgoing_connection(); 2217 } 2218 2219 // outgoing le connection establishment is done 2220 if (conn){ 2221 // remove entry 2222 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2223 btstack_memory_hci_connection_free( conn ); 2224 } 2225 return; 2226 } 2227 #endif 2228 2229 // on success, both hosts receive connection complete event 2230 if (packet[6] == HCI_ROLE_MASTER){ 2231 #ifdef ENABLE_LE_CENTRAL 2232 // if we're master on an le connection, it was an outgoing connection and we're done with it 2233 // note: no hci_connection_t object exists yet for connect with whitelist 2234 if (hci_is_le_connection_type(addr_type)){ 2235 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2236 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2237 } 2238 #endif 2239 } else { 2240 #ifdef ENABLE_LE_PERIPHERAL 2241 // if we're slave, it was an incoming connection, advertisements have stopped 2242 hci_stack->le_advertisements_active = false; 2243 #endif 2244 } 2245 2246 // LE connections are auto-accepted, so just create a connection if there isn't one already 2247 if (!conn){ 2248 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2249 } 2250 2251 // no memory, sorry. 2252 if (!conn){ 2253 return; 2254 } 2255 2256 conn->state = OPEN; 2257 conn->role = packet[6]; 2258 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2259 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2260 2261 #ifdef ENABLE_LE_PERIPHERAL 2262 if (packet[6] == HCI_ROLE_SLAVE){ 2263 hci_update_advertisements_enabled_for_current_roles(); 2264 } 2265 #endif 2266 2267 // init unenhanced att bearer mtu 2268 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2269 conn->att_connection.mtu_exchanged = false; 2270 2271 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2272 2273 // restart timer 2274 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2275 // btstack_run_loop_add_timer(&conn->timeout); 2276 2277 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2278 2279 hci_emit_nr_connections_changed(); 2280 } 2281 #endif 2282 2283 static void event_handler(uint8_t *packet, uint16_t size){ 2284 2285 uint16_t event_length = packet[1]; 2286 2287 // assert packet is complete 2288 if (size != (event_length + 2u)){ 2289 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2290 return; 2291 } 2292 2293 bd_addr_type_t addr_type; 2294 hci_con_handle_t handle; 2295 hci_connection_t * conn; 2296 int i; 2297 int create_connection_cmd; 2298 2299 #ifdef ENABLE_CLASSIC 2300 hci_link_type_t link_type; 2301 bd_addr_t addr; 2302 #endif 2303 2304 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2305 2306 switch (hci_event_packet_get_type(packet)) { 2307 2308 case HCI_EVENT_COMMAND_COMPLETE: 2309 handle_command_complete_event(packet, size); 2310 break; 2311 2312 case HCI_EVENT_COMMAND_STATUS: 2313 // get num cmd packets - limit to 1 to reduce complexity 2314 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2315 2316 // check command status to detected failed outgoing connections 2317 create_connection_cmd = 0; 2318 #ifdef ENABLE_CLASSIC 2319 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2320 create_connection_cmd = 1; 2321 } 2322 #endif 2323 #ifdef ENABLE_LE_CENTRAL 2324 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2325 create_connection_cmd = 1; 2326 } 2327 #endif 2328 if (create_connection_cmd) { 2329 uint8_t status = hci_event_command_status_get_status(packet); 2330 addr_type = hci_stack->outgoing_addr_type; 2331 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2332 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); 2333 2334 // reset outgoing address info 2335 memset(hci_stack->outgoing_addr, 0, 6); 2336 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2337 2338 // on error 2339 if (status != ERROR_CODE_SUCCESS){ 2340 #ifdef ENABLE_LE_CENTRAL 2341 if (hci_is_le_connection_type(addr_type)){ 2342 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2343 } 2344 #endif 2345 // error => outgoing connection failed 2346 if (conn != NULL){ 2347 hci_handle_connection_failed(conn, status); 2348 } 2349 } 2350 } 2351 break; 2352 2353 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2354 if (size < 3) return; 2355 uint16_t num_handles = packet[2]; 2356 if (size != (3u + num_handles * 4u)) return; 2357 uint16_t offset = 3; 2358 for (i=0; i<num_handles;i++){ 2359 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2360 offset += 2u; 2361 uint16_t num_packets = little_endian_read_16(packet, offset); 2362 offset += 2u; 2363 2364 conn = hci_connection_for_handle(handle); 2365 if (!conn){ 2366 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2367 continue; 2368 } 2369 2370 if (conn->num_packets_sent >= num_packets){ 2371 conn->num_packets_sent -= num_packets; 2372 } else { 2373 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2374 conn->num_packets_sent = 0; 2375 } 2376 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2377 2378 #ifdef ENABLE_CLASSIC 2379 // For SCO, we do the can_send_now_check here 2380 hci_notify_if_sco_can_send_now(); 2381 #endif 2382 } 2383 break; 2384 } 2385 2386 #ifdef ENABLE_CLASSIC 2387 case HCI_EVENT_INQUIRY_COMPLETE: 2388 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2389 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2390 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2391 hci_emit_event(event, sizeof(event), 1); 2392 } 2393 break; 2394 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2395 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2396 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2397 } 2398 break; 2399 case HCI_EVENT_CONNECTION_REQUEST: 2400 reverse_bd_addr(&packet[2], addr); 2401 link_type = (hci_link_type_t) packet[11]; 2402 if (hci_stack->gap_classic_accept_callback != NULL){ 2403 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2404 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2405 bd_addr_copy(hci_stack->decline_addr, addr); 2406 break; 2407 } 2408 } 2409 2410 // TODO: eval COD 8-10 2411 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2412 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2413 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2414 if (!conn) { 2415 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2416 } 2417 if (!conn) { 2418 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2419 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2420 bd_addr_copy(hci_stack->decline_addr, addr); 2421 break; 2422 } 2423 conn->role = HCI_ROLE_SLAVE; 2424 conn->state = RECEIVED_CONNECTION_REQUEST; 2425 // store info about eSCO 2426 if (link_type == HCI_LINK_TYPE_ESCO){ 2427 conn->remote_supported_features[0] |= 1; 2428 } 2429 hci_run(); 2430 break; 2431 2432 case HCI_EVENT_CONNECTION_COMPLETE: 2433 // Connection management 2434 reverse_bd_addr(&packet[5], addr); 2435 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2436 addr_type = BD_ADDR_TYPE_ACL; 2437 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2438 if (conn) { 2439 if (!packet[2]){ 2440 conn->state = OPEN; 2441 conn->con_handle = little_endian_read_16(packet, 3); 2442 2443 // queue get remote feature 2444 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2445 2446 // queue set supervision timeout if we're master 2447 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2448 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2449 } 2450 2451 // restart timer 2452 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2453 btstack_run_loop_add_timer(&conn->timeout); 2454 2455 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2456 2457 hci_emit_nr_connections_changed(); 2458 } else { 2459 // connection failed 2460 hci_handle_connection_failed(conn, packet[2]); 2461 } 2462 } 2463 break; 2464 2465 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2466 reverse_bd_addr(&packet[5], addr); 2467 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2468 if (packet[2]){ 2469 // connection failed 2470 break; 2471 } 2472 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2473 if (!conn) { 2474 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2475 } 2476 if (!conn) { 2477 break; 2478 } 2479 conn->state = OPEN; 2480 conn->con_handle = little_endian_read_16(packet, 3); 2481 2482 #ifdef ENABLE_SCO_OVER_HCI 2483 // update SCO 2484 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2485 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2486 } 2487 // trigger can send now 2488 if (hci_have_usb_transport()){ 2489 hci_stack->sco_can_send_now = 1; 2490 } 2491 #endif 2492 break; 2493 2494 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2495 handle = little_endian_read_16(packet, 3); 2496 conn = hci_connection_for_handle(handle); 2497 if (!conn) break; 2498 if (!packet[2]){ 2499 const uint8_t * features = &packet[5]; 2500 hci_handle_remote_features_page_0(conn, features); 2501 2502 // read extended features if possible 2503 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2504 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2505 break; 2506 } 2507 } 2508 hci_handle_remote_features_received(conn); 2509 break; 2510 2511 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2512 handle = little_endian_read_16(packet, 3); 2513 conn = hci_connection_for_handle(handle); 2514 if (!conn) break; 2515 // status = ok, page = 1 2516 if (!packet[2]) { 2517 uint8_t page_number = packet[5]; 2518 uint8_t maximum_page_number = packet[6]; 2519 const uint8_t * features = &packet[7]; 2520 bool done = false; 2521 switch (page_number){ 2522 case 1: 2523 hci_handle_remote_features_page_1(conn, features); 2524 if (maximum_page_number >= 2){ 2525 // get Secure Connections (Controller) from Page 2 if available 2526 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2527 } else { 2528 // otherwise, assume SC (Controller) == SC (Host) 2529 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2530 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2531 } 2532 done = true; 2533 } 2534 break; 2535 case 2: 2536 hci_handle_remote_features_page_2(conn, features); 2537 done = true; 2538 break; 2539 default: 2540 break; 2541 } 2542 if (!done) break; 2543 } 2544 hci_handle_remote_features_received(conn); 2545 break; 2546 2547 case HCI_EVENT_LINK_KEY_REQUEST: 2548 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2549 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2550 // request handled by hci_run() 2551 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2552 break; 2553 2554 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2555 reverse_bd_addr(&packet[2], addr); 2556 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2557 if (!conn) break; 2558 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2559 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2560 // Change Connection Encryption keeps link key type 2561 if (link_key_type != CHANGED_COMBINATION_KEY){ 2562 conn->link_key_type = link_key_type; 2563 } 2564 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2565 // still forward event to allow dismiss of pairing dialog 2566 break; 2567 } 2568 2569 case HCI_EVENT_PIN_CODE_REQUEST: 2570 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2571 // non-bondable mode: pin code negative reply will be sent 2572 if (!hci_stack->bondable){ 2573 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2574 hci_run(); 2575 return; 2576 } 2577 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2578 if (!hci_stack->link_key_db) break; 2579 hci_event_pin_code_request_get_bd_addr(packet, addr); 2580 hci_stack->link_key_db->delete_link_key(addr); 2581 break; 2582 2583 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2584 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2585 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2586 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2587 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2588 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2589 } else { 2590 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2591 } 2592 #endif 2593 break; 2594 2595 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2596 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2597 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2598 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2599 break; 2600 #endif 2601 2602 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2603 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2604 if (!hci_stack->ssp_auto_accept) break; 2605 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2606 break; 2607 2608 case HCI_EVENT_USER_PASSKEY_REQUEST: 2609 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2610 if (!hci_stack->ssp_auto_accept) break; 2611 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2612 break; 2613 2614 case HCI_EVENT_MODE_CHANGE: 2615 handle = hci_event_mode_change_get_handle(packet); 2616 conn = hci_connection_for_handle(handle); 2617 if (!conn) break; 2618 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2619 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2620 break; 2621 #endif 2622 2623 case HCI_EVENT_ENCRYPTION_CHANGE: 2624 handle = hci_event_encryption_change_get_connection_handle(packet); 2625 conn = hci_connection_for_handle(handle); 2626 if (!conn) break; 2627 if (hci_event_encryption_change_get_status(packet) == 0u) { 2628 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2629 if (encryption_enabled){ 2630 if (hci_is_le_connection(conn)){ 2631 // For LE, we accept connection as encrypted 2632 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2633 } 2634 #ifdef ENABLE_CLASSIC 2635 else { 2636 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2637 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2638 bool connected_uses_aes_ccm = encryption_enabled == 2; 2639 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2640 log_info("SC during pairing, but only E0 now -> abort"); 2641 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2642 break; 2643 } 2644 2645 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2646 if (connected_uses_aes_ccm){ 2647 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2648 } 2649 2650 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2651 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2652 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2653 } else { 2654 // if not, pretend everything is perfect 2655 hci_handle_read_encryption_key_size_complete(conn, 16); 2656 } 2657 } 2658 #endif 2659 } else { 2660 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2661 } 2662 } 2663 2664 break; 2665 2666 #ifdef ENABLE_CLASSIC 2667 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2668 handle = hci_event_authentication_complete_get_connection_handle(packet); 2669 conn = hci_connection_for_handle(handle); 2670 if (!conn) break; 2671 2672 // ignore authentication event if we didn't request it 2673 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2674 2675 // dedicated bonding: send result and disconnect 2676 if (conn->bonding_flags & BONDING_DEDICATED){ 2677 conn->bonding_flags &= ~BONDING_DEDICATED; 2678 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2679 conn->bonding_status = packet[2]; 2680 break; 2681 } 2682 2683 // authenticated only if auth status == 0 2684 if (hci_event_authentication_complete_get_status(packet) == 0){ 2685 // authenticated 2686 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2687 2688 // If link key sufficient for requested security and not already encrypted, start encryption 2689 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2690 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2691 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2692 break; 2693 } 2694 } 2695 2696 // emit updated security level 2697 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2698 break; 2699 #endif 2700 2701 // HCI_EVENT_DISCONNECTION_COMPLETE 2702 // has been split, to first notify stack before shutting connection down 2703 // see end of function, too. 2704 case HCI_EVENT_DISCONNECTION_COMPLETE: 2705 if (packet[2]) break; // status != 0 2706 handle = little_endian_read_16(packet, 3); 2707 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2708 if (hci_stack->acl_fragmentation_total_size > 0u) { 2709 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2710 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2711 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2712 hci_stack->acl_fragmentation_total_size = 0; 2713 hci_stack->acl_fragmentation_pos = 0; 2714 if (release_buffer){ 2715 hci_release_packet_buffer(); 2716 } 2717 } 2718 } 2719 2720 conn = hci_connection_for_handle(handle); 2721 if (!conn) break; 2722 // mark connection for shutdown 2723 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2724 2725 // emit dedicatd bonding event 2726 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2727 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2728 } 2729 2730 #ifdef ENABLE_BLE 2731 #ifdef ENABLE_LE_PERIPHERAL 2732 // re-enable advertisements for le connections if active 2733 if (hci_is_le_connection(conn)){ 2734 hci_update_advertisements_enabled_for_current_roles(); 2735 } 2736 #endif 2737 #endif 2738 break; 2739 2740 case HCI_EVENT_HARDWARE_ERROR: 2741 log_error("Hardware Error: 0x%02x", packet[2]); 2742 if (hci_stack->hardware_error_callback){ 2743 (*hci_stack->hardware_error_callback)(packet[2]); 2744 } else { 2745 // if no special requests, just reboot stack 2746 hci_power_control_off(); 2747 hci_power_control_on(); 2748 } 2749 break; 2750 2751 #ifdef ENABLE_CLASSIC 2752 case HCI_EVENT_ROLE_CHANGE: 2753 if (packet[2]) break; // status != 0 2754 reverse_bd_addr(&packet[3], addr); 2755 addr_type = BD_ADDR_TYPE_ACL; 2756 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2757 if (!conn) break; 2758 conn->role = packet[9]; 2759 break; 2760 #endif 2761 2762 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2763 // release packet buffer only for asynchronous transport and if there are not further fragements 2764 if (hci_transport_synchronous()) { 2765 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2766 return; // instead of break: to avoid re-entering hci_run() 2767 } 2768 hci_stack->acl_fragmentation_tx_active = 0; 2769 if (hci_stack->acl_fragmentation_total_size) break; 2770 hci_release_packet_buffer(); 2771 2772 // L2CAP receives this event via the hci_emit_event below 2773 2774 #ifdef ENABLE_CLASSIC 2775 // For SCO, we do the can_send_now_check here 2776 hci_notify_if_sco_can_send_now(); 2777 #endif 2778 break; 2779 2780 #ifdef ENABLE_CLASSIC 2781 case HCI_EVENT_SCO_CAN_SEND_NOW: 2782 // For SCO, we do the can_send_now_check here 2783 hci_stack->sco_can_send_now = 1; 2784 hci_notify_if_sco_can_send_now(); 2785 return; 2786 2787 // explode inquriy results for easier consumption 2788 case HCI_EVENT_INQUIRY_RESULT: 2789 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2790 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2791 gap_inquiry_explode(packet, size); 2792 break; 2793 #endif 2794 2795 #ifdef ENABLE_BLE 2796 case HCI_EVENT_LE_META: 2797 switch (packet[2]){ 2798 #ifdef ENABLE_LE_CENTRAL 2799 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2800 // log_info("advertising report received"); 2801 if (!hci_stack->le_scanning_enabled) break; 2802 le_handle_advertisement_report(packet, size); 2803 break; 2804 #endif 2805 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2806 event_handle_le_connection_complete(packet); 2807 break; 2808 2809 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2810 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2811 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2812 conn = hci_connection_for_handle(handle); 2813 if (!conn) break; 2814 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2815 break; 2816 2817 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2818 // connection 2819 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2820 conn = hci_connection_for_handle(handle); 2821 if (conn) { 2822 // read arguments 2823 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2824 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2825 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2826 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2827 2828 // validate against current connection parameter range 2829 le_connection_parameter_range_t existing_range; 2830 gap_get_connection_parameter_range(&existing_range); 2831 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2832 if (update_parameter){ 2833 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2834 conn->le_conn_interval_min = le_conn_interval_min; 2835 conn->le_conn_interval_max = le_conn_interval_max; 2836 conn->le_conn_latency = le_conn_latency; 2837 conn->le_supervision_timeout = le_supervision_timeout; 2838 } else { 2839 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2840 } 2841 } 2842 break; 2843 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2844 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2845 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2846 conn = hci_connection_for_handle(handle); 2847 if (conn) { 2848 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2849 } 2850 break; 2851 #endif 2852 default: 2853 break; 2854 } 2855 break; 2856 #endif 2857 case HCI_EVENT_VENDOR_SPECIFIC: 2858 // Vendor specific commands often create vendor specific event instead of num completed packets 2859 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2860 switch (hci_stack->manufacturer){ 2861 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2862 hci_stack->num_cmd_packets = 1; 2863 break; 2864 default: 2865 break; 2866 } 2867 break; 2868 default: 2869 break; 2870 } 2871 2872 handle_event_for_current_stack_state(packet, size); 2873 2874 // notify upper stack 2875 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2876 2877 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2878 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2879 handle = little_endian_read_16(packet, 3); 2880 hci_connection_t * aConn = hci_connection_for_handle(handle); 2881 // discard connection if app did not trigger a reconnect in the event handler 2882 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2883 hci_shutdown_connection(aConn); 2884 } 2885 } 2886 2887 // execute main loop 2888 hci_run(); 2889 } 2890 2891 #ifdef ENABLE_CLASSIC 2892 2893 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2894 static void sco_schedule_tx(hci_connection_t * conn); 2895 2896 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2897 log_debug("SCO TX Timeout"); 2898 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2899 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2900 if (!conn) return; 2901 2902 // trigger send 2903 conn->sco_tx_ready = 1; 2904 // extra packet if CVSD but SCO buffer is too short 2905 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2906 conn->sco_tx_ready++; 2907 } 2908 hci_notify_if_sco_can_send_now(); 2909 } 2910 2911 2912 #define SCO_TX_AFTER_RX_MS (6) 2913 2914 static void sco_schedule_tx(hci_connection_t * conn){ 2915 2916 uint32_t now = btstack_run_loop_get_time_ms(); 2917 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2918 int time_delta_ms = sco_tx_ms - now; 2919 2920 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2921 2922 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2923 btstack_run_loop_set_timer(timer, time_delta_ms); 2924 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2925 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2926 btstack_run_loop_add_timer(timer); 2927 } 2928 2929 static void sco_handler(uint8_t * packet, uint16_t size){ 2930 // lookup connection struct 2931 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2932 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2933 if (!conn) return; 2934 2935 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2936 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2937 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2938 packet[2] = 0x3c; 2939 memmove(&packet[3], &packet[23], 63); 2940 size = 63; 2941 } 2942 } 2943 2944 if (hci_have_usb_transport()){ 2945 // Nothing to do 2946 } else { 2947 // 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); 2948 if (hci_stack->synchronous_flow_control_enabled == 0){ 2949 uint32_t now = btstack_run_loop_get_time_ms(); 2950 2951 if (!conn->sco_rx_valid){ 2952 // ignore first 10 packets 2953 conn->sco_rx_count++; 2954 // log_debug("sco rx count %u", conn->sco_rx_count); 2955 if (conn->sco_rx_count == 10) { 2956 // use first timestamp as is and pretent it just started 2957 conn->sco_rx_ms = now; 2958 conn->sco_rx_valid = 1; 2959 conn->sco_rx_count = 0; 2960 sco_schedule_tx(conn); 2961 } 2962 } else { 2963 // track expected arrival timme 2964 conn->sco_rx_count++; 2965 conn->sco_rx_ms += 7; 2966 int delta = (int32_t) (now - conn->sco_rx_ms); 2967 if (delta > 0){ 2968 conn->sco_rx_ms++; 2969 } 2970 // log_debug("sco rx %u", conn->sco_rx_ms); 2971 sco_schedule_tx(conn); 2972 } 2973 } 2974 } 2975 // deliver to app 2976 if (hci_stack->sco_packet_handler) { 2977 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2978 } 2979 2980 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2981 conn->num_packets_completed++; 2982 hci_stack->host_completed_packets = 1; 2983 hci_run(); 2984 #endif 2985 } 2986 #endif 2987 2988 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2989 hci_dump_packet(packet_type, 1, packet, size); 2990 switch (packet_type) { 2991 case HCI_EVENT_PACKET: 2992 event_handler(packet, size); 2993 break; 2994 case HCI_ACL_DATA_PACKET: 2995 acl_handler(packet, size); 2996 break; 2997 #ifdef ENABLE_CLASSIC 2998 case HCI_SCO_DATA_PACKET: 2999 sco_handler(packet, size); 3000 break; 3001 #endif 3002 default: 3003 break; 3004 } 3005 } 3006 3007 /** 3008 * @brief Add event packet handler. 3009 */ 3010 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3011 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3012 } 3013 3014 3015 /** Register HCI packet handlers */ 3016 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3017 hci_stack->acl_packet_handler = handler; 3018 } 3019 3020 #ifdef ENABLE_CLASSIC 3021 /** 3022 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3023 */ 3024 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3025 hci_stack->sco_packet_handler = handler; 3026 } 3027 #endif 3028 3029 static void hci_state_reset(void){ 3030 // no connections yet 3031 hci_stack->connections = NULL; 3032 3033 // keep discoverable/connectable as this has been requested by the client(s) 3034 // hci_stack->discoverable = 0; 3035 // hci_stack->connectable = 0; 3036 // hci_stack->bondable = 1; 3037 // hci_stack->own_addr_type = 0; 3038 3039 // buffer is free 3040 hci_stack->hci_packet_buffer_reserved = 0; 3041 3042 // no pending cmds 3043 hci_stack->decline_reason = 0; 3044 hci_stack->new_scan_enable_value = 0xff; 3045 3046 hci_stack->secure_connections_active = false; 3047 3048 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3049 hci_stack->classic_read_local_oob_data = true; 3050 #endif 3051 3052 // LE 3053 #ifdef ENABLE_BLE 3054 memset(hci_stack->le_random_address, 0, 6); 3055 hci_stack->le_random_address_set = 0; 3056 #endif 3057 #ifdef ENABLE_LE_CENTRAL 3058 hci_stack->le_scanning_active = 0; 3059 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3060 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3061 hci_stack->le_whitelist_capacity = 0; 3062 #endif 3063 } 3064 3065 #ifdef ENABLE_CLASSIC 3066 /** 3067 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3068 */ 3069 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3070 // store and open remote device db 3071 hci_stack->link_key_db = link_key_db; 3072 if (hci_stack->link_key_db) { 3073 hci_stack->link_key_db->open(); 3074 } 3075 } 3076 #endif 3077 3078 void hci_init(const hci_transport_t *transport, const void *config){ 3079 3080 #ifdef HAVE_MALLOC 3081 if (!hci_stack) { 3082 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3083 } 3084 #else 3085 hci_stack = &hci_stack_static; 3086 #endif 3087 memset(hci_stack, 0, sizeof(hci_stack_t)); 3088 3089 // reference to use transport layer implementation 3090 hci_stack->hci_transport = transport; 3091 3092 // reference to used config 3093 hci_stack->config = config; 3094 3095 // setup pointer for outgoing packet buffer 3096 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3097 3098 // max acl payload size defined in config.h 3099 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3100 3101 // register packet handlers with transport 3102 transport->register_packet_handler(&packet_handler); 3103 3104 hci_stack->state = HCI_STATE_OFF; 3105 3106 // class of device 3107 hci_stack->class_of_device = 0x007a020c; // Smartphone 3108 3109 // bondable by default 3110 hci_stack->bondable = 1; 3111 3112 #ifdef ENABLE_CLASSIC 3113 // classic name 3114 hci_stack->local_name = default_classic_name; 3115 3116 // Master slave policy 3117 hci_stack->master_slave_policy = 1; 3118 3119 // Allow Role Switch 3120 hci_stack->allow_role_switch = 1; 3121 3122 // Default / minimum security level = 2 3123 hci_stack->gap_security_level = LEVEL_2; 3124 3125 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3126 hci_stack->gap_required_encyrption_key_size = 7; 3127 #endif 3128 3129 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3130 hci_stack->ssp_enable = 1; 3131 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3132 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3133 hci_stack->ssp_auto_accept = 1; 3134 3135 // Secure Connections: enable (requires support from Controller) 3136 hci_stack->secure_connections_enable = true; 3137 3138 // voice setting - signed 16 bit pcm data with CVSD over the air 3139 hci_stack->sco_voice_setting = 0x60; 3140 3141 #ifdef ENABLE_LE_CENTRAL 3142 // connection parameter to use for outgoing connections 3143 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3144 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3145 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3146 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3147 hci_stack->le_connection_latency = 4; // 4 3148 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3149 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3150 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3151 3152 // default LE Scanning 3153 hci_stack->le_scan_type = 0x1; // active 3154 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3155 hci_stack->le_scan_window = 0x30; // 30 ms 3156 #endif 3157 3158 #ifdef ENABLE_LE_PERIPHERAL 3159 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3160 #endif 3161 3162 // connection parameter range used to answer connection parameter update requests in l2cap 3163 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3164 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3165 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3166 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3167 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3168 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3169 3170 hci_state_reset(); 3171 } 3172 3173 void hci_deinit(void){ 3174 #ifdef HAVE_MALLOC 3175 if (hci_stack) { 3176 free(hci_stack); 3177 } 3178 #endif 3179 hci_stack = NULL; 3180 3181 #ifdef ENABLE_CLASSIC 3182 disable_l2cap_timeouts = 0; 3183 #endif 3184 } 3185 3186 /** 3187 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3188 */ 3189 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3190 hci_stack->chipset = chipset_driver; 3191 3192 // reset chipset driver - init is also called on power_up 3193 if (hci_stack->chipset && hci_stack->chipset->init){ 3194 hci_stack->chipset->init(hci_stack->config); 3195 } 3196 } 3197 3198 /** 3199 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3200 */ 3201 void hci_set_control(const btstack_control_t *hardware_control){ 3202 // references to used control implementation 3203 hci_stack->control = hardware_control; 3204 // init with transport config 3205 hardware_control->init(hci_stack->config); 3206 } 3207 3208 void hci_close(void){ 3209 // close remote device db 3210 if (hci_stack->link_key_db) { 3211 hci_stack->link_key_db->close(); 3212 } 3213 3214 btstack_linked_list_iterator_t lit; 3215 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3216 while (btstack_linked_list_iterator_has_next(&lit)){ 3217 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3218 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3219 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3220 hci_shutdown_connection(connection); 3221 } 3222 3223 hci_power_control(HCI_POWER_OFF); 3224 3225 #ifdef HAVE_MALLOC 3226 free(hci_stack); 3227 #endif 3228 hci_stack = NULL; 3229 } 3230 3231 #ifdef ENABLE_CLASSIC 3232 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3233 // validate ranage and set 3234 if (encryption_key_size < 7) return; 3235 if (encryption_key_size > 16) return; 3236 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3237 } 3238 3239 void gap_set_security_level(gap_security_level_t security_level){ 3240 hci_stack->gap_security_level = security_level; 3241 } 3242 3243 gap_security_level_t gap_get_security_level(void){ 3244 return hci_stack->gap_security_level; 3245 } 3246 #endif 3247 3248 #ifdef ENABLE_CLASSIC 3249 void gap_set_class_of_device(uint32_t class_of_device){ 3250 hci_stack->class_of_device = class_of_device; 3251 } 3252 3253 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3254 hci_stack->default_link_policy_settings = default_link_policy_settings; 3255 } 3256 3257 void gap_set_allow_role_switch(bool allow_role_switch){ 3258 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3259 } 3260 3261 uint8_t hci_get_allow_role_switch(void){ 3262 return hci_stack->allow_role_switch; 3263 } 3264 3265 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3266 hci_stack->link_supervision_timeout = link_supervision_timeout; 3267 } 3268 3269 void hci_disable_l2cap_timeout_check(void){ 3270 disable_l2cap_timeouts = 1; 3271 } 3272 #endif 3273 3274 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3275 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3276 void hci_set_bd_addr(bd_addr_t addr){ 3277 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3278 hci_stack->custom_bd_addr_set = 1; 3279 } 3280 #endif 3281 3282 // State-Module-Driver overview 3283 // state module low-level 3284 // HCI_STATE_OFF off close 3285 // HCI_STATE_INITIALIZING, on open 3286 // HCI_STATE_WORKING, on open 3287 // HCI_STATE_HALTING, on open 3288 // HCI_STATE_SLEEPING, off/sleep close 3289 // HCI_STATE_FALLING_ASLEEP on open 3290 3291 static int hci_power_control_on(void){ 3292 3293 // power on 3294 int err = 0; 3295 if (hci_stack->control && hci_stack->control->on){ 3296 err = (*hci_stack->control->on)(); 3297 } 3298 if (err){ 3299 log_error( "POWER_ON failed"); 3300 hci_emit_hci_open_failed(); 3301 return err; 3302 } 3303 3304 // int chipset driver 3305 if (hci_stack->chipset && hci_stack->chipset->init){ 3306 hci_stack->chipset->init(hci_stack->config); 3307 } 3308 3309 // init transport 3310 if (hci_stack->hci_transport->init){ 3311 hci_stack->hci_transport->init(hci_stack->config); 3312 } 3313 3314 // open transport 3315 err = hci_stack->hci_transport->open(); 3316 if (err){ 3317 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3318 if (hci_stack->control && hci_stack->control->off){ 3319 (*hci_stack->control->off)(); 3320 } 3321 hci_emit_hci_open_failed(); 3322 return err; 3323 } 3324 return 0; 3325 } 3326 3327 static void hci_power_control_off(void){ 3328 3329 log_info("hci_power_control_off"); 3330 3331 // close low-level device 3332 hci_stack->hci_transport->close(); 3333 3334 log_info("hci_power_control_off - hci_transport closed"); 3335 3336 // power off 3337 if (hci_stack->control && hci_stack->control->off){ 3338 (*hci_stack->control->off)(); 3339 } 3340 3341 log_info("hci_power_control_off - control closed"); 3342 3343 hci_stack->state = HCI_STATE_OFF; 3344 } 3345 3346 static void hci_power_control_sleep(void){ 3347 3348 log_info("hci_power_control_sleep"); 3349 3350 #if 0 3351 // don't close serial port during sleep 3352 3353 // close low-level device 3354 hci_stack->hci_transport->close(hci_stack->config); 3355 #endif 3356 3357 // sleep mode 3358 if (hci_stack->control && hci_stack->control->sleep){ 3359 (*hci_stack->control->sleep)(); 3360 } 3361 3362 hci_stack->state = HCI_STATE_SLEEPING; 3363 } 3364 3365 static int hci_power_control_wake(void){ 3366 3367 log_info("hci_power_control_wake"); 3368 3369 // wake on 3370 if (hci_stack->control && hci_stack->control->wake){ 3371 (*hci_stack->control->wake)(); 3372 } 3373 3374 #if 0 3375 // open low-level device 3376 int err = hci_stack->hci_transport->open(hci_stack->config); 3377 if (err){ 3378 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3379 if (hci_stack->control && hci_stack->control->off){ 3380 (*hci_stack->control->off)(); 3381 } 3382 hci_emit_hci_open_failed(); 3383 return err; 3384 } 3385 #endif 3386 3387 return 0; 3388 } 3389 3390 static void hci_power_transition_to_initializing(void){ 3391 // set up state machine 3392 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3393 hci_stack->hci_packet_buffer_reserved = 0; 3394 hci_stack->state = HCI_STATE_INITIALIZING; 3395 hci_stack->substate = HCI_INIT_SEND_RESET; 3396 } 3397 3398 // returns error 3399 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3400 int err; 3401 switch (power_mode){ 3402 case HCI_POWER_ON: 3403 err = hci_power_control_on(); 3404 if (err != 0) { 3405 log_error("hci_power_control_on() error %d", err); 3406 return err; 3407 } 3408 hci_power_transition_to_initializing(); 3409 break; 3410 case HCI_POWER_OFF: 3411 // do nothing 3412 break; 3413 case HCI_POWER_SLEEP: 3414 // do nothing (with SLEEP == OFF) 3415 break; 3416 default: 3417 btstack_assert(false); 3418 break; 3419 } 3420 return ERROR_CODE_SUCCESS; 3421 } 3422 3423 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3424 switch (power_mode){ 3425 case HCI_POWER_ON: 3426 // do nothing 3427 break; 3428 case HCI_POWER_OFF: 3429 // no connections yet, just turn it off 3430 hci_power_control_off(); 3431 break; 3432 case HCI_POWER_SLEEP: 3433 // no connections yet, just turn it off 3434 hci_power_control_sleep(); 3435 break; 3436 default: 3437 btstack_assert(false); 3438 break; 3439 } 3440 return ERROR_CODE_SUCCESS; 3441 } 3442 3443 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3444 switch (power_mode){ 3445 case HCI_POWER_ON: 3446 // do nothing 3447 break; 3448 case HCI_POWER_OFF: 3449 // see hci_run 3450 hci_stack->state = HCI_STATE_HALTING; 3451 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3452 break; 3453 case HCI_POWER_SLEEP: 3454 // see hci_run 3455 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3456 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3457 break; 3458 default: 3459 btstack_assert(false); 3460 break; 3461 } 3462 return ERROR_CODE_SUCCESS; 3463 } 3464 3465 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3466 switch (power_mode){ 3467 case HCI_POWER_ON: 3468 hci_power_transition_to_initializing(); 3469 break; 3470 case HCI_POWER_OFF: 3471 // do nothing 3472 break; 3473 case HCI_POWER_SLEEP: 3474 // see hci_run 3475 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3476 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3477 break; 3478 default: 3479 btstack_assert(false); 3480 break; 3481 } 3482 return ERROR_CODE_SUCCESS; 3483 } 3484 3485 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3486 switch (power_mode){ 3487 case HCI_POWER_ON: 3488 3489 #ifdef HAVE_PLATFORM_IPHONE_OS 3490 // nothing to do, if H4 supports power management 3491 if (btstack_control_iphone_power_management_enabled()){ 3492 hci_stack->state = HCI_STATE_INITIALIZING; 3493 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3494 break; 3495 } 3496 #endif 3497 hci_power_transition_to_initializing(); 3498 break; 3499 case HCI_POWER_OFF: 3500 // see hci_run 3501 hci_stack->state = HCI_STATE_HALTING; 3502 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3503 break; 3504 case HCI_POWER_SLEEP: 3505 // do nothing 3506 break; 3507 default: 3508 btstack_assert(false); 3509 break; 3510 } 3511 return ERROR_CODE_SUCCESS; 3512 } 3513 3514 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3515 int err; 3516 switch (power_mode){ 3517 case HCI_POWER_ON: 3518 #ifdef HAVE_PLATFORM_IPHONE_OS 3519 // nothing to do, if H4 supports power management 3520 if (btstack_control_iphone_power_management_enabled()){ 3521 hci_stack->state = HCI_STATE_INITIALIZING; 3522 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3523 hci_update_scan_enable(); 3524 break; 3525 } 3526 #endif 3527 err = hci_power_control_wake(); 3528 if (err) return err; 3529 hci_power_transition_to_initializing(); 3530 break; 3531 case HCI_POWER_OFF: 3532 hci_stack->state = HCI_STATE_HALTING; 3533 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3534 break; 3535 case HCI_POWER_SLEEP: 3536 // do nothing 3537 break; 3538 default: 3539 btstack_assert(false); 3540 break; 3541 } 3542 return ERROR_CODE_SUCCESS; 3543 } 3544 3545 int hci_power_control(HCI_POWER_MODE power_mode){ 3546 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3547 int err = 0; 3548 switch (hci_stack->state){ 3549 case HCI_STATE_OFF: 3550 err = hci_power_control_state_off(power_mode); 3551 break; 3552 case HCI_STATE_INITIALIZING: 3553 err = hci_power_control_state_initializing(power_mode); 3554 break; 3555 case HCI_STATE_WORKING: 3556 err = hci_power_control_state_working(power_mode); 3557 break; 3558 case HCI_STATE_HALTING: 3559 err = hci_power_control_state_halting(power_mode); 3560 break; 3561 case HCI_STATE_FALLING_ASLEEP: 3562 err = hci_power_control_state_falling_asleep(power_mode); 3563 break; 3564 case HCI_STATE_SLEEPING: 3565 err = hci_power_control_state_sleeping(power_mode); 3566 break; 3567 default: 3568 btstack_assert(false); 3569 break; 3570 } 3571 if (err != 0){ 3572 return err; 3573 } 3574 3575 // create internal event 3576 hci_emit_state(); 3577 3578 // trigger next/first action 3579 hci_run(); 3580 3581 return 0; 3582 } 3583 3584 3585 #ifdef ENABLE_CLASSIC 3586 3587 static void hci_update_scan_enable(void){ 3588 // 2 = page scan, 1 = inq scan 3589 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3590 hci_run(); 3591 } 3592 3593 void gap_discoverable_control(uint8_t enable){ 3594 if (enable) enable = 1; // normalize argument 3595 3596 if (hci_stack->discoverable == enable){ 3597 hci_emit_discoverable_enabled(hci_stack->discoverable); 3598 return; 3599 } 3600 3601 hci_stack->discoverable = enable; 3602 hci_update_scan_enable(); 3603 } 3604 3605 void gap_connectable_control(uint8_t enable){ 3606 if (enable) enable = 1; // normalize argument 3607 3608 // don't emit event 3609 if (hci_stack->connectable == enable) return; 3610 3611 hci_stack->connectable = enable; 3612 hci_update_scan_enable(); 3613 } 3614 #endif 3615 3616 void gap_local_bd_addr(bd_addr_t address_buffer){ 3617 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3618 } 3619 3620 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3621 static void hci_host_num_completed_packets(void){ 3622 3623 // create packet manually as arrays are not supported and num_commands should not get reduced 3624 hci_reserve_packet_buffer(); 3625 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3626 3627 uint16_t size = 0; 3628 uint16_t num_handles = 0; 3629 packet[size++] = 0x35; 3630 packet[size++] = 0x0c; 3631 size++; // skip param len 3632 size++; // skip num handles 3633 3634 // add { handle, packets } entries 3635 btstack_linked_item_t * it; 3636 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3637 hci_connection_t * connection = (hci_connection_t *) it; 3638 if (connection->num_packets_completed){ 3639 little_endian_store_16(packet, size, connection->con_handle); 3640 size += 2; 3641 little_endian_store_16(packet, size, connection->num_packets_completed); 3642 size += 2; 3643 // 3644 num_handles++; 3645 connection->num_packets_completed = 0; 3646 } 3647 } 3648 3649 packet[2] = size - 3; 3650 packet[3] = num_handles; 3651 3652 hci_stack->host_completed_packets = 0; 3653 3654 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3655 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3656 3657 // release packet buffer for synchronous transport implementations 3658 if (hci_transport_synchronous()){ 3659 hci_release_packet_buffer(); 3660 hci_emit_transport_packet_sent(); 3661 } 3662 } 3663 #endif 3664 3665 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3666 UNUSED(ds); 3667 hci_stack->substate = HCI_HALTING_CLOSE; 3668 // allow packet handlers to defer final shutdown 3669 hci_emit_state(); 3670 hci_run(); 3671 } 3672 3673 static bool hci_run_acl_fragments(void){ 3674 if (hci_stack->acl_fragmentation_total_size > 0u) { 3675 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3676 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3677 if (connection) { 3678 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3679 hci_send_acl_packet_fragments(connection); 3680 return true; 3681 } 3682 } else { 3683 // connection gone -> discard further fragments 3684 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3685 hci_stack->acl_fragmentation_total_size = 0; 3686 hci_stack->acl_fragmentation_pos = 0; 3687 } 3688 } 3689 return false; 3690 } 3691 3692 #ifdef ENABLE_CLASSIC 3693 static bool hci_run_general_gap_classic(void){ 3694 3695 // decline incoming connections 3696 if (hci_stack->decline_reason){ 3697 uint8_t reason = hci_stack->decline_reason; 3698 hci_stack->decline_reason = 0; 3699 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3700 return true; 3701 } 3702 // send scan enable 3703 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3704 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3705 hci_stack->new_scan_enable_value = 0xff; 3706 return true; 3707 } 3708 // start/stop inquiry 3709 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3710 uint8_t duration = hci_stack->inquiry_state; 3711 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3712 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3713 return true; 3714 } 3715 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3716 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3717 hci_send_cmd(&hci_inquiry_cancel); 3718 return true; 3719 } 3720 // remote name request 3721 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3722 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3723 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3724 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3725 return true; 3726 } 3727 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3728 // Local OOB data 3729 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 3730 hci_stack->classic_read_local_oob_data = false; 3731 if (hci_stack->local_supported_commands[1] & 0x10u){ 3732 hci_send_cmd(&hci_read_local_extended_oob_data); 3733 } else { 3734 hci_send_cmd(&hci_read_local_oob_data); 3735 } 3736 } 3737 #endif 3738 // pairing 3739 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3740 uint8_t state = hci_stack->gap_pairing_state; 3741 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3742 switch (state){ 3743 case GAP_PAIRING_STATE_SEND_PIN: 3744 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); 3745 break; 3746 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3747 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3748 break; 3749 case GAP_PAIRING_STATE_SEND_PASSKEY: 3750 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3751 break; 3752 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3753 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3754 break; 3755 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3756 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3757 break; 3758 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3759 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3760 break; 3761 default: 3762 break; 3763 } 3764 return true; 3765 } 3766 return false; 3767 } 3768 #endif 3769 3770 #ifdef ENABLE_BLE 3771 static bool hci_run_general_gap_le(void){ 3772 3773 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3774 3775 if (hci_stack->state != HCI_STATE_WORKING) return false; 3776 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3777 3778 3779 // Phase 1: collect what to stop 3780 3781 bool scanning_stop = false; 3782 bool connecting_stop = false; 3783 bool advertising_stop = false; 3784 3785 #ifndef ENABLE_LE_CENTRAL 3786 UNUSED(scanning_stop); 3787 UNUSED(connecting_stop); 3788 #endif 3789 #ifndef ENABLE_LE_PERIPHERAL 3790 UNUSED(advertising_stop); 3791 #endif 3792 3793 // check if whitelist needs modification 3794 bool whitelist_modification_pending = false; 3795 btstack_linked_list_iterator_t lit; 3796 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3797 while (btstack_linked_list_iterator_has_next(&lit)){ 3798 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3799 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3800 whitelist_modification_pending = true; 3801 break; 3802 } 3803 } 3804 // check if resolving list needs modification 3805 bool resolving_list_modification_pending = false; 3806 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3807 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 3808 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3809 resolving_list_modification_pending = true; 3810 } 3811 #endif 3812 3813 #ifdef ENABLE_LE_CENTRAL 3814 // scanning control 3815 if (hci_stack->le_scanning_active) { 3816 // stop if: 3817 // - parameter change required 3818 // - it's disabled 3819 // - whitelist change required but used for scanning 3820 // - resolving list modified 3821 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3822 if ((hci_stack->le_scanning_param_update) || 3823 !hci_stack->le_scanning_enabled || 3824 scanning_uses_whitelist || 3825 resolving_list_modification_pending){ 3826 3827 scanning_stop = true; 3828 } 3829 } 3830 #endif 3831 3832 #ifdef ENABLE_LE_CENTRAL 3833 // connecting control 3834 bool connecting_with_whitelist; 3835 switch (hci_stack->le_connecting_state){ 3836 case LE_CONNECTING_DIRECT: 3837 case LE_CONNECTING_WHITELIST: 3838 // stop connecting if: 3839 // - connecting uses white and whitelist modification pending 3840 // - if it got disabled 3841 // - resolving list modified 3842 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 3843 if ((connecting_with_whitelist && whitelist_modification_pending) || 3844 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3845 resolving_list_modification_pending) { 3846 3847 connecting_stop = true; 3848 } 3849 break; 3850 default: 3851 break; 3852 } 3853 #endif 3854 3855 #ifdef ENABLE_LE_PERIPHERAL 3856 // le advertisement control 3857 if (hci_stack->le_advertisements_active){ 3858 // stop if: 3859 // - parameter change required 3860 // - it's disabled 3861 // - whitelist change required but used for advertisement filter policy 3862 // - resolving list modified 3863 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3864 if ((hci_stack->le_advertisements_todo != 0) || 3865 !hci_stack->le_advertisements_enabled_for_current_roles || 3866 (advertising_uses_whitelist & whitelist_modification_pending) || 3867 resolving_list_modification_pending) { 3868 3869 advertising_stop = true; 3870 } 3871 } 3872 #endif 3873 3874 3875 // Phase 2: stop everything that should be off during modifications 3876 3877 #ifdef ENABLE_LE_CENTRAL 3878 if (scanning_stop){ 3879 hci_stack->le_scanning_active = false; 3880 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3881 return true; 3882 } 3883 #endif 3884 3885 #ifdef ENABLE_LE_CENTRAL 3886 if (connecting_stop){ 3887 hci_send_cmd(&hci_le_create_connection_cancel); 3888 return true; 3889 } 3890 #endif 3891 3892 #ifdef ENABLE_LE_PERIPHERAL 3893 if (advertising_stop){ 3894 hci_stack->le_advertisements_active = false; 3895 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3896 return true; 3897 } 3898 #endif 3899 3900 // Phase 3: modify 3901 3902 #ifdef ENABLE_LE_CENTRAL 3903 if (hci_stack->le_scanning_param_update){ 3904 hci_stack->le_scanning_param_update = false; 3905 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 3906 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 3907 return true; 3908 } 3909 #endif 3910 3911 #ifdef ENABLE_LE_PERIPHERAL 3912 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3913 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3914 hci_send_cmd(&hci_le_set_advertising_parameters, 3915 hci_stack->le_advertisements_interval_min, 3916 hci_stack->le_advertisements_interval_max, 3917 hci_stack->le_advertisements_type, 3918 hci_stack->le_own_addr_type, 3919 hci_stack->le_advertisements_direct_address_type, 3920 hci_stack->le_advertisements_direct_address, 3921 hci_stack->le_advertisements_channel_map, 3922 hci_stack->le_advertisements_filter_policy); 3923 return true; 3924 } 3925 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3926 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3927 uint8_t adv_data_clean[31]; 3928 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3929 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3930 hci_stack->le_advertisements_data_len); 3931 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3932 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3933 return true; 3934 } 3935 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3936 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3937 uint8_t scan_data_clean[31]; 3938 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3939 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3940 hci_stack->le_scan_response_data_len); 3941 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3942 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3943 return true; 3944 } 3945 #endif 3946 3947 3948 #ifdef ENABLE_LE_CENTRAL 3949 // if connect with whitelist was active and is not cancelled yet, wait until next time 3950 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 3951 #endif 3952 3953 // LE Whitelist Management 3954 if (whitelist_modification_pending){ 3955 // add/remove entries 3956 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3957 while (btstack_linked_list_iterator_has_next(&lit)){ 3958 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3959 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3960 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3961 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 3962 return true; 3963 } 3964 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3965 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 3966 entry->state |= LE_WHITELIST_ON_CONTROLLER; 3967 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3968 return true; 3969 } 3970 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 3971 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3972 btstack_memory_whitelist_entry_free(entry); 3973 } 3974 } 3975 } 3976 3977 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3978 // LE Resolving List Management 3979 if (resolving_list_supported) { 3980 uint16_t i; 3981 switch (hci_stack->le_resolving_list_state) { 3982 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 3983 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 3984 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 3985 return true; 3986 case LE_RESOLVING_LIST_READ_SIZE: 3987 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 3988 hci_send_cmd(&hci_le_read_resolving_list_size); 3989 return true; 3990 case LE_RESOLVING_LIST_SEND_CLEAR: 3991 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 3992 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 3993 sizeof(hci_stack->le_resolving_list_add_entries)); 3994 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 3995 sizeof(hci_stack->le_resolving_list_remove_entries)); 3996 hci_send_cmd(&hci_le_clear_resolving_list); 3997 return true; 3998 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 3999 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4000 uint8_t offset = i >> 3; 4001 uint8_t mask = 1 << (i & 7); 4002 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4003 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4004 bd_addr_t peer_identity_addreses; 4005 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4006 sm_key_t peer_irk; 4007 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4008 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4009 4010 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4011 // trigger whitelist entry 'update' (work around for controller bug) 4012 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4013 while (btstack_linked_list_iterator_has_next(&lit)) { 4014 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4015 if (entry->address_type != peer_identity_addr_type) continue; 4016 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4017 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4018 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4019 } 4020 #endif 4021 4022 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4023 peer_identity_addreses); 4024 return true; 4025 } 4026 4027 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4028 4029 /* fall through */ 4030 4031 case LE_RESOLVING_LIST_ADD_ENTRIES: 4032 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4033 uint8_t offset = i >> 3; 4034 uint8_t mask = 1 << (i & 7); 4035 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4036 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4037 bd_addr_t peer_identity_addreses; 4038 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4039 sm_key_t peer_irk; 4040 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4041 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4042 const uint8_t *local_irk = gap_get_persistent_irk(); 4043 // command uses format specifier 'P' that stores 16-byte value without flip 4044 uint8_t local_irk_flipped[16]; 4045 uint8_t peer_irk_flipped[16]; 4046 reverse_128(local_irk, local_irk_flipped); 4047 reverse_128(peer_irk, peer_irk_flipped); 4048 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4049 peer_irk_flipped, local_irk_flipped); 4050 return true; 4051 } 4052 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4053 break; 4054 4055 default: 4056 break; 4057 } 4058 } 4059 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4060 #endif 4061 4062 // Phase 4: restore state 4063 4064 #ifdef ENABLE_LE_CENTRAL 4065 // re-start scanning 4066 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4067 hci_stack->le_scanning_active = true; 4068 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4069 return true; 4070 } 4071 #endif 4072 4073 #ifdef ENABLE_LE_CENTRAL 4074 // re-start connecting 4075 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4076 bd_addr_t null_addr; 4077 memset(null_addr, 0, 6); 4078 hci_send_cmd(&hci_le_create_connection, 4079 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4080 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4081 1, // use whitelist 4082 0, // peer address type 4083 null_addr, // peer bd addr 4084 hci_stack->le_own_addr_type, // our addr type: 4085 hci_stack->le_connection_interval_min, // conn interval min 4086 hci_stack->le_connection_interval_max, // conn interval max 4087 hci_stack->le_connection_latency, // conn latency 4088 hci_stack->le_supervision_timeout, // conn latency 4089 hci_stack->le_minimum_ce_length, // min ce length 4090 hci_stack->le_maximum_ce_length // max ce length 4091 ); 4092 return true; 4093 } 4094 #endif 4095 4096 #ifdef ENABLE_LE_PERIPHERAL 4097 // re-start advertising 4098 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4099 // check if advertisements should be enabled given 4100 hci_stack->le_advertisements_active = true; 4101 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4102 return true; 4103 } 4104 #endif 4105 4106 return false; 4107 } 4108 #endif 4109 4110 static bool hci_run_general_pending_commands(void){ 4111 btstack_linked_item_t * it; 4112 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4113 hci_connection_t * connection = (hci_connection_t *) it; 4114 4115 switch(connection->state){ 4116 case SEND_CREATE_CONNECTION: 4117 switch(connection->address_type){ 4118 #ifdef ENABLE_CLASSIC 4119 case BD_ADDR_TYPE_ACL: 4120 log_info("sending hci_create_connection"); 4121 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4122 break; 4123 #endif 4124 default: 4125 #ifdef ENABLE_BLE 4126 #ifdef ENABLE_LE_CENTRAL 4127 log_info("sending hci_le_create_connection"); 4128 hci_send_cmd(&hci_le_create_connection, 4129 hci_stack->le_connection_scan_interval, // conn scan interval 4130 hci_stack->le_connection_scan_window, // conn scan windows 4131 0, // don't use whitelist 4132 connection->address_type, // peer address type 4133 connection->address, // peer bd addr 4134 hci_stack->le_own_addr_type, // our addr type: 4135 hci_stack->le_connection_interval_min, // conn interval min 4136 hci_stack->le_connection_interval_max, // conn interval max 4137 hci_stack->le_connection_latency, // conn latency 4138 hci_stack->le_supervision_timeout, // conn latency 4139 hci_stack->le_minimum_ce_length, // min ce length 4140 hci_stack->le_maximum_ce_length // max ce length 4141 ); 4142 connection->state = SENT_CREATE_CONNECTION; 4143 #endif 4144 #endif 4145 break; 4146 } 4147 return true; 4148 4149 #ifdef ENABLE_CLASSIC 4150 case RECEIVED_CONNECTION_REQUEST: 4151 connection->role = HCI_ROLE_SLAVE; 4152 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4153 log_info("sending hci_accept_connection_request"); 4154 connection->state = ACCEPTED_CONNECTION_REQUEST; 4155 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4156 } 4157 return true; 4158 #endif 4159 4160 #ifdef ENABLE_BLE 4161 #ifdef ENABLE_LE_CENTRAL 4162 case SEND_CANCEL_CONNECTION: 4163 connection->state = SENT_CANCEL_CONNECTION; 4164 hci_send_cmd(&hci_le_create_connection_cancel); 4165 return true; 4166 #endif 4167 #endif 4168 case SEND_DISCONNECT: 4169 connection->state = SENT_DISCONNECT; 4170 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4171 return true; 4172 4173 default: 4174 break; 4175 } 4176 4177 // no further commands if connection is about to get shut down 4178 if (connection->state == SENT_DISCONNECT) continue; 4179 4180 if (connection->authentication_flags & READ_RSSI){ 4181 connectionClearAuthenticationFlags(connection, READ_RSSI); 4182 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4183 return true; 4184 } 4185 4186 #ifdef ENABLE_CLASSIC 4187 4188 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4189 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4190 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4191 return true; 4192 } 4193 4194 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4195 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4196 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4197 4198 link_key_t link_key; 4199 link_key_type_t link_key_type; 4200 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4201 4202 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4203 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4204 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4205 if (sc_downgrade){ 4206 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4207 connection->state = SENT_DISCONNECT; 4208 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4209 return true; 4210 } 4211 4212 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4213 if (have_link_key && security_level_sufficient){ 4214 connection->link_key_type = link_key_type; 4215 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4216 } else { 4217 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4218 } 4219 return true; 4220 } 4221 4222 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4223 log_info("denying to pin request"); 4224 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4225 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4226 return true; 4227 } 4228 4229 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4230 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4231 // tweak authentication requirements 4232 uint8_t authreq = hci_stack->ssp_authentication_requirement; 4233 if (connection->bonding_flags & BONDING_DEDICATED){ 4234 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4235 } 4236 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4237 authreq |= 1; 4238 } 4239 uint8_t have_oob_data = 0; 4240 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4241 if (connection->classic_oob_c_192 != NULL){ 4242 have_oob_data |= 1; 4243 } 4244 if (connection->classic_oob_c_256 != NULL){ 4245 have_oob_data |= 2; 4246 } 4247 #endif 4248 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4249 return true; 4250 } 4251 4252 if (connection->authentication_flags & SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4253 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4254 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4255 return true; 4256 } 4257 4258 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4259 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4260 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4261 const uint8_t zero[16] = { 0 }; 4262 const uint8_t * r_192 = zero; 4263 const uint8_t * c_192 = zero; 4264 const uint8_t * r_256 = zero; 4265 const uint8_t * c_256 = zero; 4266 // verify P-256 OOB 4267 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4268 c_256 = connection->classic_oob_c_256; 4269 if (connection->classic_oob_r_256 != NULL) { 4270 r_256 = connection->classic_oob_r_256; 4271 } 4272 } 4273 // verify P-192 OOB 4274 if ((connection->classic_oob_c_192 != NULL)) { 4275 c_192 = connection->classic_oob_c_192; 4276 if (connection->classic_oob_r_192 != NULL) { 4277 r_192 = connection->classic_oob_r_192; 4278 } 4279 } 4280 // Reply 4281 if (c_256 != zero) { 4282 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4283 } else if (c_192 != zero){ 4284 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4285 } else { 4286 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4287 } 4288 return true; 4289 } 4290 #endif 4291 4292 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4293 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4294 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4295 return true; 4296 } 4297 4298 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4299 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4300 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4301 return true; 4302 } 4303 4304 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4305 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4306 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4307 return true; 4308 } 4309 4310 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4311 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4312 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4313 return true; 4314 } 4315 4316 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4317 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4318 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4319 return true; 4320 } 4321 4322 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4323 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4324 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4325 connection->state = SENT_DISCONNECT; 4326 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4327 return true; 4328 } 4329 4330 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4331 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4332 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4333 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4334 return true; 4335 } 4336 4337 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4338 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4339 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4340 return true; 4341 } 4342 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4343 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4344 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4345 return true; 4346 } 4347 #endif 4348 4349 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4350 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4351 if (connection->state != SENT_DISCONNECT){ 4352 connection->state = SENT_DISCONNECT; 4353 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4354 return true; 4355 } 4356 } 4357 4358 #ifdef ENABLE_CLASSIC 4359 uint16_t sniff_min_interval; 4360 switch (connection->sniff_min_interval){ 4361 case 0: 4362 break; 4363 case 0xffff: 4364 connection->sniff_min_interval = 0; 4365 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4366 return true; 4367 default: 4368 sniff_min_interval = connection->sniff_min_interval; 4369 connection->sniff_min_interval = 0; 4370 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4371 return true; 4372 } 4373 4374 if (connection->request_role != HCI_ROLE_INVALID){ 4375 hci_role_t role = connection->request_role; 4376 connection->request_role = HCI_ROLE_INVALID; 4377 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4378 return true; 4379 } 4380 #endif 4381 4382 #ifdef ENABLE_BLE 4383 switch (connection->le_con_parameter_update_state){ 4384 // response to L2CAP CON PARAMETER UPDATE REQUEST 4385 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4386 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4387 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4388 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4389 0x0000, 0xffff); 4390 return true; 4391 case CON_PARAMETER_UPDATE_REPLY: 4392 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4393 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4394 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4395 0x0000, 0xffff); 4396 return true; 4397 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4398 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4399 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4400 return true; 4401 default: 4402 break; 4403 } 4404 if (connection->le_phy_update_all_phys != 0xffu){ 4405 uint8_t all_phys = connection->le_phy_update_all_phys; 4406 connection->le_phy_update_all_phys = 0xff; 4407 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); 4408 return true; 4409 } 4410 #endif 4411 } 4412 return false; 4413 } 4414 4415 static void hci_run(void){ 4416 4417 bool done; 4418 4419 // send continuation fragments first, as they block the prepared packet buffer 4420 done = hci_run_acl_fragments(); 4421 if (done) return; 4422 4423 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4424 // send host num completed packets next as they don't require num_cmd_packets > 0 4425 if (!hci_can_send_comand_packet_transport()) return; 4426 if (hci_stack->host_completed_packets){ 4427 hci_host_num_completed_packets(); 4428 return; 4429 } 4430 #endif 4431 4432 if (!hci_can_send_command_packet_now()) return; 4433 4434 // global/non-connection oriented commands 4435 4436 4437 #ifdef ENABLE_CLASSIC 4438 // general gap classic 4439 done = hci_run_general_gap_classic(); 4440 if (done) return; 4441 #endif 4442 4443 #ifdef ENABLE_BLE 4444 // general gap le 4445 done = hci_run_general_gap_le(); 4446 if (done) return; 4447 #endif 4448 4449 // send pending HCI commands 4450 done = hci_run_general_pending_commands(); 4451 if (done) return; 4452 4453 // stack state sub statemachines 4454 hci_connection_t * connection; 4455 switch (hci_stack->state){ 4456 case HCI_STATE_INITIALIZING: 4457 hci_initializing_run(); 4458 break; 4459 4460 case HCI_STATE_HALTING: 4461 4462 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4463 switch (hci_stack->substate){ 4464 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4465 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4466 4467 #ifdef ENABLE_BLE 4468 #ifdef ENABLE_LE_CENTRAL 4469 // free whitelist entries 4470 { 4471 btstack_linked_list_iterator_t lit; 4472 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4473 while (btstack_linked_list_iterator_has_next(&lit)){ 4474 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4475 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4476 btstack_memory_whitelist_entry_free(entry); 4477 } 4478 } 4479 #endif 4480 #endif 4481 // close all open connections 4482 connection = (hci_connection_t *) hci_stack->connections; 4483 if (connection){ 4484 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4485 if (!hci_can_send_command_packet_now()) return; 4486 4487 // check state 4488 if (connection->state == SENT_DISCONNECT) return; 4489 connection->state = SENT_DISCONNECT; 4490 4491 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4492 4493 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4494 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4495 4496 // ... which would be ignored anyway as we shutdown (free) the connection now 4497 hci_shutdown_connection(connection); 4498 4499 // finally, send the disconnect command 4500 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4501 return; 4502 } 4503 4504 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4505 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4506 log_info("HCI_STATE_HALTING: wait 50 ms"); 4507 hci_stack->substate = HCI_HALTING_W4_TIMER; 4508 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4509 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4510 btstack_run_loop_add_timer(&hci_stack->timeout); 4511 break; 4512 } 4513 4514 /* fall through */ 4515 4516 case HCI_HALTING_CLOSE: 4517 log_info("HCI_STATE_HALTING, calling off"); 4518 4519 // switch mode 4520 hci_power_control_off(); 4521 4522 log_info("HCI_STATE_HALTING, emitting state"); 4523 hci_emit_state(); 4524 log_info("HCI_STATE_HALTING, done"); 4525 break; 4526 4527 case HCI_HALTING_W4_TIMER: 4528 // keep waiting 4529 4530 break; 4531 default: 4532 break; 4533 } 4534 4535 break; 4536 4537 case HCI_STATE_FALLING_ASLEEP: 4538 switch(hci_stack->substate) { 4539 case HCI_FALLING_ASLEEP_DISCONNECT: 4540 log_info("HCI_STATE_FALLING_ASLEEP"); 4541 // close all open connections 4542 connection = (hci_connection_t *) hci_stack->connections; 4543 4544 #ifdef HAVE_PLATFORM_IPHONE_OS 4545 // don't close connections, if H4 supports power management 4546 if (btstack_control_iphone_power_management_enabled()){ 4547 connection = NULL; 4548 } 4549 #endif 4550 if (connection){ 4551 4552 // send disconnect 4553 if (!hci_can_send_command_packet_now()) return; 4554 4555 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4556 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4557 4558 // send disconnected event right away - causes higher layer connections to get closed, too. 4559 hci_shutdown_connection(connection); 4560 return; 4561 } 4562 4563 if (hci_classic_supported()){ 4564 // disable page and inquiry scan 4565 if (!hci_can_send_command_packet_now()) return; 4566 4567 log_info("HCI_STATE_HALTING, disabling inq scans"); 4568 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4569 4570 // continue in next sub state 4571 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4572 break; 4573 } 4574 4575 /* fall through */ 4576 4577 case HCI_FALLING_ASLEEP_COMPLETE: 4578 log_info("HCI_STATE_HALTING, calling sleep"); 4579 #ifdef HAVE_PLATFORM_IPHONE_OS 4580 // don't actually go to sleep, if H4 supports power management 4581 if (btstack_control_iphone_power_management_enabled()){ 4582 // SLEEP MODE reached 4583 hci_stack->state = HCI_STATE_SLEEPING; 4584 hci_emit_state(); 4585 break; 4586 } 4587 #endif 4588 // switch mode 4589 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4590 hci_emit_state(); 4591 break; 4592 4593 default: 4594 break; 4595 } 4596 break; 4597 4598 default: 4599 break; 4600 } 4601 } 4602 4603 int hci_send_cmd_packet(uint8_t *packet, int size){ 4604 // house-keeping 4605 4606 #ifdef ENABLE_CLASSIC 4607 bd_addr_t addr; 4608 hci_connection_t * conn; 4609 #endif 4610 #ifdef ENABLE_LE_CENTRAL 4611 uint8_t initiator_filter_policy; 4612 #endif 4613 4614 uint16_t opcode = little_endian_read_16(packet, 0); 4615 switch (opcode) { 4616 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4617 hci_stack->loopback_mode = packet[3]; 4618 break; 4619 4620 #ifdef ENABLE_CLASSIC 4621 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4622 reverse_bd_addr(&packet[3], addr); 4623 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4624 4625 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4626 if (!conn) { 4627 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4628 if (!conn) { 4629 // notify client that alloc failed 4630 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4631 return -1; // packet not sent to controller 4632 } 4633 conn->state = SEND_CREATE_CONNECTION; 4634 conn->role = HCI_ROLE_MASTER; 4635 } 4636 log_info("conn state %u", conn->state); 4637 switch (conn->state) { 4638 // if connection active exists 4639 case OPEN: 4640 // and OPEN, emit connection complete command 4641 hci_emit_connection_complete(addr, conn->con_handle, 0); 4642 return -1; // packet not sent to controller 4643 case RECEIVED_DISCONNECTION_COMPLETE: 4644 // create connection triggered in disconnect complete event, let's do it now 4645 break; 4646 case SEND_CREATE_CONNECTION: 4647 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4648 break; 4649 default: 4650 // otherwise, just ignore as it is already in the open process 4651 return -1; // packet not sent to controller 4652 } 4653 conn->state = SENT_CREATE_CONNECTION; 4654 4655 // track outgoing connection 4656 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4657 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4658 break; 4659 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4660 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4661 break; 4662 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4663 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4664 break; 4665 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4666 if (hci_stack->link_key_db) { 4667 reverse_bd_addr(&packet[3], addr); 4668 hci_stack->link_key_db->delete_link_key(addr); 4669 } 4670 break; 4671 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4672 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4673 reverse_bd_addr(&packet[3], addr); 4674 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4675 if (conn) { 4676 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4677 } 4678 break; 4679 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4680 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4681 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4682 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4683 reverse_bd_addr(&packet[3], addr); 4684 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4685 if (conn) { 4686 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4687 } 4688 break; 4689 4690 #ifdef ENABLE_SCO_OVER_HCI 4691 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4692 // setup_synchronous_connection? Voice setting at offset 22 4693 // TODO: compare to current setting if sco connection already active 4694 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4695 break; 4696 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4697 // accept_synchronus_connection? Voice setting at offset 18 4698 // TODO: compare to current setting if sco connection already active 4699 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4700 break; 4701 #endif 4702 #endif 4703 4704 #ifdef ENABLE_BLE 4705 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4706 hci_stack->le_random_address_set = 1; 4707 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4708 break; 4709 #ifdef ENABLE_LE_PERIPHERAL 4710 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4711 hci_stack->le_advertisements_active = packet[3] != 0; 4712 break; 4713 #endif 4714 #ifdef ENABLE_LE_CENTRAL 4715 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4716 // white list used? 4717 initiator_filter_policy = packet[7]; 4718 switch (initiator_filter_policy) { 4719 case 0: 4720 // whitelist not used 4721 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4722 break; 4723 case 1: 4724 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4725 break; 4726 default: 4727 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4728 break; 4729 } 4730 // track outgoing connection 4731 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4732 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4733 break; 4734 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4735 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4736 break; 4737 #endif 4738 #endif 4739 default: 4740 break; 4741 } 4742 4743 hci_stack->num_cmd_packets--; 4744 4745 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4746 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4747 } 4748 4749 // disconnect because of security block 4750 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4751 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4752 if (!connection) return; 4753 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4754 } 4755 4756 4757 // Configure Secure Simple Pairing 4758 4759 #ifdef ENABLE_CLASSIC 4760 4761 // enable will enable SSP during init 4762 void gap_ssp_set_enable(int enable){ 4763 hci_stack->ssp_enable = enable; 4764 } 4765 4766 static int hci_local_ssp_activated(void){ 4767 return gap_ssp_supported() && hci_stack->ssp_enable; 4768 } 4769 4770 // if set, BTstack will respond to io capability request using authentication requirement 4771 void gap_ssp_set_io_capability(int io_capability){ 4772 hci_stack->ssp_io_capability = io_capability; 4773 } 4774 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4775 hci_stack->ssp_authentication_requirement = authentication_requirement; 4776 } 4777 4778 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4779 void gap_ssp_set_auto_accept(int auto_accept){ 4780 hci_stack->ssp_auto_accept = auto_accept; 4781 } 4782 4783 void gap_secure_connections_enable(bool enable){ 4784 hci_stack->secure_connections_enable = enable; 4785 } 4786 4787 #endif 4788 4789 // va_list part of hci_send_cmd 4790 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4791 if (!hci_can_send_command_packet_now()){ 4792 log_error("hci_send_cmd called but cannot send packet now"); 4793 return 0; 4794 } 4795 4796 // for HCI INITIALIZATION 4797 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4798 hci_stack->last_cmd_opcode = cmd->opcode; 4799 4800 hci_reserve_packet_buffer(); 4801 uint8_t * packet = hci_stack->hci_packet_buffer; 4802 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4803 int err = hci_send_cmd_packet(packet, size); 4804 4805 // release packet buffer on error or for synchronous transport implementations 4806 if ((err < 0) || hci_transport_synchronous()){ 4807 hci_release_packet_buffer(); 4808 hci_emit_transport_packet_sent(); 4809 } 4810 4811 return err; 4812 } 4813 4814 /** 4815 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4816 */ 4817 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4818 va_list argptr; 4819 va_start(argptr, cmd); 4820 int res = hci_send_cmd_va_arg(cmd, argptr); 4821 va_end(argptr); 4822 return res; 4823 } 4824 4825 // Create various non-HCI events. 4826 // TODO: generalize, use table similar to hci_create_command 4827 4828 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4829 // dump packet 4830 if (dump) { 4831 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4832 } 4833 4834 // dispatch to all event handlers 4835 btstack_linked_list_iterator_t it; 4836 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4837 while (btstack_linked_list_iterator_has_next(&it)){ 4838 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4839 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4840 } 4841 } 4842 4843 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4844 if (!hci_stack->acl_packet_handler) return; 4845 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4846 } 4847 4848 #ifdef ENABLE_CLASSIC 4849 static void hci_notify_if_sco_can_send_now(void){ 4850 // notify SCO sender if waiting 4851 if (!hci_stack->sco_waiting_for_can_send_now) return; 4852 if (hci_can_send_sco_packet_now()){ 4853 hci_stack->sco_waiting_for_can_send_now = 0; 4854 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4855 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4856 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4857 } 4858 } 4859 4860 // parsing end emitting has been merged to reduce code size 4861 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4862 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4863 4864 uint8_t * eir_data; 4865 ad_context_t context; 4866 const uint8_t * name; 4867 uint8_t name_len; 4868 4869 if (size < 3) return; 4870 4871 int event_type = hci_event_packet_get_type(packet); 4872 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4873 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4874 4875 switch (event_type){ 4876 case HCI_EVENT_INQUIRY_RESULT: 4877 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4878 if (size != (3 + (num_responses * 14))) return; 4879 break; 4880 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4881 if (size != 257) return; 4882 if (num_responses != 1) return; 4883 break; 4884 default: 4885 return; 4886 } 4887 4888 // event[1] is set at the end 4889 int i; 4890 for (i=0; i<num_responses;i++){ 4891 memset(event, 0, sizeof(event)); 4892 event[0] = GAP_EVENT_INQUIRY_RESULT; 4893 uint8_t event_size = 18; // if name is not set by EIR 4894 4895 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4896 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4897 (void)memcpy(&event[9], 4898 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4899 3); // class of device 4900 (void)memcpy(&event[12], 4901 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4902 2); // clock offset 4903 4904 switch (event_type){ 4905 case HCI_EVENT_INQUIRY_RESULT: 4906 // 14,15,16,17 = 0, size 18 4907 break; 4908 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4909 event[14] = 1; 4910 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4911 // 16,17 = 0, size 18 4912 break; 4913 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4914 event[14] = 1; 4915 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4916 // EIR packets only contain a single inquiry response 4917 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4918 name = NULL; 4919 // Iterate over EIR data 4920 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4921 uint8_t data_type = ad_iterator_get_data_type(&context); 4922 uint8_t data_size = ad_iterator_get_data_len(&context); 4923 const uint8_t * data = ad_iterator_get_data(&context); 4924 // Prefer Complete Local Name over Shortend Local Name 4925 switch (data_type){ 4926 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4927 if (name) continue; 4928 /* fall through */ 4929 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4930 name = data; 4931 name_len = data_size; 4932 break; 4933 default: 4934 break; 4935 } 4936 } 4937 if (name){ 4938 event[16] = 1; 4939 // truncate name if needed 4940 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4941 event[17] = len; 4942 (void)memcpy(&event[18], name, len); 4943 event_size += len; 4944 } 4945 break; 4946 default: 4947 return; 4948 } 4949 event[1] = event_size - 2; 4950 hci_emit_event(event, event_size, 1); 4951 } 4952 } 4953 #endif 4954 4955 void hci_emit_state(void){ 4956 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4957 uint8_t event[3]; 4958 event[0] = BTSTACK_EVENT_STATE; 4959 event[1] = sizeof(event) - 2u; 4960 event[2] = hci_stack->state; 4961 hci_emit_event(event, sizeof(event), 1); 4962 } 4963 4964 #ifdef ENABLE_CLASSIC 4965 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4966 uint8_t event[13]; 4967 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4968 event[1] = sizeof(event) - 2; 4969 event[2] = status; 4970 little_endian_store_16(event, 3, con_handle); 4971 reverse_bd_addr(address, &event[5]); 4972 event[11] = 1; // ACL connection 4973 event[12] = 0; // encryption disabled 4974 hci_emit_event(event, sizeof(event), 1); 4975 } 4976 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4977 if (disable_l2cap_timeouts) return; 4978 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4979 uint8_t event[4]; 4980 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4981 event[1] = sizeof(event) - 2; 4982 little_endian_store_16(event, 2, conn->con_handle); 4983 hci_emit_event(event, sizeof(event), 1); 4984 } 4985 #endif 4986 4987 #ifdef ENABLE_BLE 4988 #ifdef ENABLE_LE_CENTRAL 4989 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){ 4990 uint8_t event[21]; 4991 event[0] = HCI_EVENT_LE_META; 4992 event[1] = sizeof(event) - 2u; 4993 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4994 event[3] = status; 4995 little_endian_store_16(event, 4, con_handle); 4996 event[6] = 0; // TODO: role 4997 event[7] = address_type; 4998 reverse_bd_addr(address, &event[8]); 4999 little_endian_store_16(event, 14, 0); // interval 5000 little_endian_store_16(event, 16, 0); // latency 5001 little_endian_store_16(event, 18, 0); // supervision timeout 5002 event[20] = 0; // master clock accuracy 5003 hci_emit_event(event, sizeof(event), 1); 5004 } 5005 #endif 5006 #endif 5007 5008 static void hci_emit_transport_packet_sent(void){ 5009 // notify upper stack that it might be possible to send again 5010 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5011 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5012 } 5013 5014 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5015 uint8_t event[6]; 5016 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5017 event[1] = sizeof(event) - 2u; 5018 event[2] = 0; // status = OK 5019 little_endian_store_16(event, 3, con_handle); 5020 event[5] = reason; 5021 hci_emit_event(event, sizeof(event), 1); 5022 } 5023 5024 static void hci_emit_nr_connections_changed(void){ 5025 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5026 uint8_t event[3]; 5027 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5028 event[1] = sizeof(event) - 2u; 5029 event[2] = nr_hci_connections(); 5030 hci_emit_event(event, sizeof(event), 1); 5031 } 5032 5033 static void hci_emit_hci_open_failed(void){ 5034 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5035 uint8_t event[2]; 5036 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5037 event[1] = sizeof(event) - 2u; 5038 hci_emit_event(event, sizeof(event), 1); 5039 } 5040 5041 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5042 log_info("hci_emit_dedicated_bonding_result %u ", status); 5043 uint8_t event[9]; 5044 int pos = 0; 5045 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5046 event[pos++] = sizeof(event) - 2u; 5047 event[pos++] = status; 5048 reverse_bd_addr(address, &event[pos]); 5049 hci_emit_event(event, sizeof(event), 1); 5050 } 5051 5052 5053 #ifdef ENABLE_CLASSIC 5054 5055 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5056 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5057 uint8_t event[5]; 5058 int pos = 0; 5059 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5060 event[pos++] = sizeof(event) - 2; 5061 little_endian_store_16(event, 2, con_handle); 5062 pos += 2; 5063 event[pos++] = level; 5064 hci_emit_event(event, sizeof(event), 1); 5065 } 5066 5067 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5068 if (!connection) return LEVEL_0; 5069 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5070 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5071 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5072 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5073 // LEVEL 4 always requires 128 bit encrytion key size 5074 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5075 security_level = LEVEL_3; 5076 } 5077 return security_level; 5078 } 5079 5080 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5081 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5082 uint8_t event[3]; 5083 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5084 event[1] = sizeof(event) - 2; 5085 event[2] = enabled; 5086 hci_emit_event(event, sizeof(event), 1); 5087 } 5088 5089 // query if remote side supports eSCO 5090 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5091 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5092 if (!connection) return 0; 5093 return (connection->remote_supported_features[0] & 1) != 0; 5094 } 5095 5096 static bool hci_ssp_supported(hci_connection_t * connection){ 5097 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5098 return (connection->bonding_flags & mask) == mask; 5099 } 5100 5101 // query if remote side supports SSP 5102 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5103 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5104 if (!connection) return 0; 5105 return hci_ssp_supported(connection) ? 1 : 0; 5106 } 5107 5108 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5109 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5110 } 5111 5112 // GAP API 5113 /** 5114 * @bbrief enable/disable bonding. default is enabled 5115 * @praram enabled 5116 */ 5117 void gap_set_bondable_mode(int enable){ 5118 hci_stack->bondable = enable ? 1 : 0; 5119 } 5120 /** 5121 * @brief Get bondable mode. 5122 * @return 1 if bondable 5123 */ 5124 int gap_get_bondable_mode(void){ 5125 return hci_stack->bondable; 5126 } 5127 5128 /** 5129 * @brief map link keys to security levels 5130 */ 5131 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5132 switch (link_key_type){ 5133 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5134 return LEVEL_4; 5135 case COMBINATION_KEY: 5136 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5137 return LEVEL_3; 5138 default: 5139 return LEVEL_2; 5140 } 5141 } 5142 5143 /** 5144 * @brief map link keys to secure connection yes/no 5145 */ 5146 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5147 switch (link_key_type){ 5148 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5149 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5150 return 1; 5151 default: 5152 return 0; 5153 } 5154 } 5155 5156 /** 5157 * @brief map link keys to authenticated 5158 */ 5159 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5160 switch (link_key_type){ 5161 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5162 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5163 return 1; 5164 default: 5165 return 0; 5166 } 5167 } 5168 5169 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5170 log_info("gap_mitm_protection_required_for_security_level %u", level); 5171 return level > LEVEL_2; 5172 } 5173 5174 /** 5175 * @brief get current security level 5176 */ 5177 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5178 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5179 if (!connection) return LEVEL_0; 5180 return gap_security_level_for_connection(connection); 5181 } 5182 5183 /** 5184 * @brief request connection to device to 5185 * @result GAP_AUTHENTICATION_RESULT 5186 */ 5187 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5188 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5189 if (!connection){ 5190 hci_emit_security_level(con_handle, LEVEL_0); 5191 return; 5192 } 5193 5194 btstack_assert(hci_is_le_connection(connection) == false); 5195 5196 gap_security_level_t current_level = gap_security_level(con_handle); 5197 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5198 requested_level, connection->requested_security_level, current_level); 5199 5200 // assumption: earlier requested security higher than current level => security request is active 5201 if (current_level < connection->requested_security_level){ 5202 if (connection->requested_security_level < requested_level){ 5203 // increase requested level as new level is higher 5204 5205 // TODO: handle re-authentication when done 5206 5207 connection->requested_security_level = requested_level; 5208 } 5209 return; 5210 } 5211 5212 // no request active, notify if security sufficient 5213 if (requested_level <= current_level){ 5214 hci_emit_security_level(con_handle, current_level); 5215 return; 5216 } 5217 5218 // store request 5219 connection->requested_security_level = requested_level; 5220 5221 // start to authenticate connection if authentication not already active 5222 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5223 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5224 hci_run(); 5225 } 5226 5227 /** 5228 * @brief start dedicated bonding with device. disconnect after bonding 5229 * @param device 5230 * @param request MITM protection 5231 * @result GAP_DEDICATED_BONDING_COMPLETE 5232 */ 5233 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5234 5235 // create connection state machine 5236 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5237 5238 if (!connection){ 5239 return BTSTACK_MEMORY_ALLOC_FAILED; 5240 } 5241 5242 // delete linkn key 5243 gap_drop_link_key_for_bd_addr(device); 5244 5245 // configure LEVEL_2/3, dedicated bonding 5246 connection->state = SEND_CREATE_CONNECTION; 5247 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5248 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5249 connection->bonding_flags = BONDING_DEDICATED; 5250 5251 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5252 5253 // handle: connnection failure (connection complete != ok) 5254 // handle: authentication failure 5255 // handle: disconnect on done 5256 5257 hci_run(); 5258 5259 return 0; 5260 } 5261 #endif 5262 5263 void gap_set_local_name(const char * local_name){ 5264 hci_stack->local_name = local_name; 5265 } 5266 5267 5268 #ifdef ENABLE_BLE 5269 5270 #ifdef ENABLE_LE_CENTRAL 5271 void gap_start_scan(void){ 5272 hci_stack->le_scanning_enabled = true; 5273 hci_run(); 5274 } 5275 5276 void gap_stop_scan(void){ 5277 hci_stack->le_scanning_enabled = false; 5278 hci_run(); 5279 } 5280 5281 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5282 hci_stack->le_scan_type = scan_type; 5283 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5284 hci_stack->le_scan_interval = scan_interval; 5285 hci_stack->le_scan_window = scan_window; 5286 hci_stack->le_scanning_param_update = true; 5287 hci_run(); 5288 } 5289 5290 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5291 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5292 } 5293 5294 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5295 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5296 if (!conn){ 5297 // disallow if le connection is already outgoing 5298 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5299 log_error("le connection already active"); 5300 return ERROR_CODE_COMMAND_DISALLOWED; 5301 } 5302 5303 log_info("gap_connect: no connection exists yet, creating context"); 5304 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5305 if (!conn){ 5306 // notify client that alloc failed 5307 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5308 log_info("gap_connect: failed to alloc hci_connection_t"); 5309 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5310 } 5311 5312 // set le connecting state 5313 if (hci_is_le_connection_type(addr_type)){ 5314 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5315 } 5316 5317 conn->state = SEND_CREATE_CONNECTION; 5318 log_info("gap_connect: send create connection next"); 5319 hci_run(); 5320 return ERROR_CODE_SUCCESS; 5321 } 5322 5323 if (!hci_is_le_connection(conn) || 5324 (conn->state == SEND_CREATE_CONNECTION) || 5325 (conn->state == SENT_CREATE_CONNECTION)) { 5326 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5327 log_error("gap_connect: classic connection or connect is already being created"); 5328 return GATT_CLIENT_IN_WRONG_STATE; 5329 } 5330 5331 // check if connection was just disconnected 5332 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5333 log_info("gap_connect: send create connection (again)"); 5334 conn->state = SEND_CREATE_CONNECTION; 5335 hci_run(); 5336 return ERROR_CODE_SUCCESS; 5337 } 5338 5339 log_info("gap_connect: context exists with state %u", conn->state); 5340 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5341 hci_run(); 5342 return ERROR_CODE_SUCCESS; 5343 } 5344 5345 // @assumption: only a single outgoing LE Connection exists 5346 static hci_connection_t * gap_get_outgoing_connection(void){ 5347 btstack_linked_item_t *it; 5348 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5349 hci_connection_t * conn = (hci_connection_t *) it; 5350 if (!hci_is_le_connection(conn)) continue; 5351 switch (conn->state){ 5352 case SEND_CREATE_CONNECTION: 5353 case SENT_CREATE_CONNECTION: 5354 case SENT_CANCEL_CONNECTION: 5355 return conn; 5356 default: 5357 break; 5358 }; 5359 } 5360 return NULL; 5361 } 5362 5363 uint8_t gap_connect_cancel(void){ 5364 hci_connection_t * conn = gap_get_outgoing_connection(); 5365 if (!conn) return 0; 5366 switch (conn->state){ 5367 case SEND_CREATE_CONNECTION: 5368 // skip sending create connection and emit event instead 5369 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5370 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5371 btstack_memory_hci_connection_free( conn ); 5372 break; 5373 case SENT_CREATE_CONNECTION: 5374 // request to send cancel connection 5375 conn->state = SEND_CANCEL_CONNECTION; 5376 hci_run(); 5377 break; 5378 default: 5379 break; 5380 } 5381 return 0; 5382 } 5383 #endif 5384 5385 #ifdef ENABLE_LE_CENTRAL 5386 /** 5387 * @brief Set connection parameters for outgoing connections 5388 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5389 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5390 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5391 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5392 * @param conn_latency, default: 4 5393 * @param supervision_timeout (unit: 10ms), default: 720 ms 5394 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5395 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5396 */ 5397 5398 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5399 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5400 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5401 hci_stack->le_connection_scan_interval = conn_scan_interval; 5402 hci_stack->le_connection_scan_window = conn_scan_window; 5403 hci_stack->le_connection_interval_min = conn_interval_min; 5404 hci_stack->le_connection_interval_max = conn_interval_max; 5405 hci_stack->le_connection_latency = conn_latency; 5406 hci_stack->le_supervision_timeout = supervision_timeout; 5407 hci_stack->le_minimum_ce_length = min_ce_length; 5408 hci_stack->le_maximum_ce_length = max_ce_length; 5409 } 5410 #endif 5411 5412 /** 5413 * @brief Updates the connection parameters for a given LE connection 5414 * @param handle 5415 * @param conn_interval_min (unit: 1.25ms) 5416 * @param conn_interval_max (unit: 1.25ms) 5417 * @param conn_latency 5418 * @param supervision_timeout (unit: 10ms) 5419 * @returns 0 if ok 5420 */ 5421 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5422 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5423 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5424 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5425 connection->le_conn_interval_min = conn_interval_min; 5426 connection->le_conn_interval_max = conn_interval_max; 5427 connection->le_conn_latency = conn_latency; 5428 connection->le_supervision_timeout = supervision_timeout; 5429 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5430 hci_run(); 5431 return 0; 5432 } 5433 5434 /** 5435 * @brief Request an update of the connection parameter for a given LE connection 5436 * @param handle 5437 * @param conn_interval_min (unit: 1.25ms) 5438 * @param conn_interval_max (unit: 1.25ms) 5439 * @param conn_latency 5440 * @param supervision_timeout (unit: 10ms) 5441 * @returns 0 if ok 5442 */ 5443 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5444 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5445 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5446 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5447 connection->le_conn_interval_min = conn_interval_min; 5448 connection->le_conn_interval_max = conn_interval_max; 5449 connection->le_conn_latency = conn_latency; 5450 connection->le_supervision_timeout = supervision_timeout; 5451 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5452 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5453 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5454 return 0; 5455 } 5456 5457 #ifdef ENABLE_LE_PERIPHERAL 5458 5459 /** 5460 * @brief Set Advertisement Data 5461 * @param advertising_data_length 5462 * @param advertising_data (max 31 octets) 5463 * @note data is not copied, pointer has to stay valid 5464 */ 5465 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5466 hci_stack->le_advertisements_data_len = advertising_data_length; 5467 hci_stack->le_advertisements_data = advertising_data; 5468 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5469 hci_run(); 5470 } 5471 5472 /** 5473 * @brief Set Scan Response Data 5474 * @param advertising_data_length 5475 * @param advertising_data (max 31 octets) 5476 * @note data is not copied, pointer has to stay valid 5477 */ 5478 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5479 hci_stack->le_scan_response_data_len = scan_response_data_length; 5480 hci_stack->le_scan_response_data = scan_response_data; 5481 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5482 hci_run(); 5483 } 5484 5485 /** 5486 * @brief Set Advertisement Parameters 5487 * @param adv_int_min 5488 * @param adv_int_max 5489 * @param adv_type 5490 * @param direct_address_type 5491 * @param direct_address 5492 * @param channel_map 5493 * @param filter_policy 5494 * 5495 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5496 */ 5497 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5498 uint8_t direct_address_typ, bd_addr_t direct_address, 5499 uint8_t channel_map, uint8_t filter_policy) { 5500 5501 hci_stack->le_advertisements_interval_min = adv_int_min; 5502 hci_stack->le_advertisements_interval_max = adv_int_max; 5503 hci_stack->le_advertisements_type = adv_type; 5504 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5505 hci_stack->le_advertisements_channel_map = channel_map; 5506 hci_stack->le_advertisements_filter_policy = filter_policy; 5507 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5508 6); 5509 5510 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5511 hci_run(); 5512 } 5513 5514 /** 5515 * @brief Enable/Disable Advertisements 5516 * @param enabled 5517 */ 5518 void gap_advertisements_enable(int enabled){ 5519 hci_stack->le_advertisements_enabled = enabled != 0; 5520 hci_update_advertisements_enabled_for_current_roles(); 5521 hci_run(); 5522 } 5523 5524 #endif 5525 5526 void hci_le_set_own_address_type(uint8_t own_address_type){ 5527 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5528 if (own_address_type == hci_stack->le_own_addr_type) return; 5529 hci_stack->le_own_addr_type = own_address_type; 5530 5531 #ifdef ENABLE_LE_PERIPHERAL 5532 // update advertisement parameters, too 5533 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5534 hci_run(); 5535 #endif 5536 #ifdef ENABLE_LE_CENTRAL 5537 // note: we don't update scan parameters or modify ongoing connection attempts 5538 #endif 5539 } 5540 5541 #endif 5542 5543 uint8_t gap_disconnect(hci_con_handle_t handle){ 5544 hci_connection_t * conn = hci_connection_for_handle(handle); 5545 if (!conn){ 5546 hci_emit_disconnection_complete(handle, 0); 5547 return 0; 5548 } 5549 // ignore if already disconnected 5550 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5551 return 0; 5552 } 5553 conn->state = SEND_DISCONNECT; 5554 hci_run(); 5555 return 0; 5556 } 5557 5558 int gap_read_rssi(hci_con_handle_t con_handle){ 5559 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5560 if (hci_connection == NULL) return 0; 5561 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5562 hci_run(); 5563 return 1; 5564 } 5565 5566 /** 5567 * @brief Get connection type 5568 * @param con_handle 5569 * @result connection_type 5570 */ 5571 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5572 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5573 if (!conn) return GAP_CONNECTION_INVALID; 5574 switch (conn->address_type){ 5575 case BD_ADDR_TYPE_LE_PUBLIC: 5576 case BD_ADDR_TYPE_LE_RANDOM: 5577 return GAP_CONNECTION_LE; 5578 case BD_ADDR_TYPE_SCO: 5579 return GAP_CONNECTION_SCO; 5580 case BD_ADDR_TYPE_ACL: 5581 return GAP_CONNECTION_ACL; 5582 default: 5583 return GAP_CONNECTION_INVALID; 5584 } 5585 } 5586 5587 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5588 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5589 if (!conn) return HCI_ROLE_INVALID; 5590 return (hci_role_t) conn->role; 5591 } 5592 5593 5594 #ifdef ENABLE_CLASSIC 5595 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5596 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5597 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5598 conn->request_role = role; 5599 hci_run(); 5600 return ERROR_CODE_SUCCESS; 5601 } 5602 #endif 5603 5604 #ifdef ENABLE_BLE 5605 5606 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){ 5607 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5608 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5609 5610 conn->le_phy_update_all_phys = all_phys; 5611 conn->le_phy_update_tx_phys = tx_phys; 5612 conn->le_phy_update_rx_phys = rx_phys; 5613 conn->le_phy_update_phy_options = phy_options; 5614 5615 hci_run(); 5616 5617 return 0; 5618 } 5619 5620 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5621 // check if already in list 5622 btstack_linked_list_iterator_t it; 5623 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5624 while (btstack_linked_list_iterator_has_next(&it)) { 5625 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5626 if (entry->address_type != address_type) { 5627 continue; 5628 } 5629 if (memcmp(entry->address, address, 6) != 0) { 5630 continue; 5631 } 5632 // disallow if already scheduled to add 5633 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5634 return ERROR_CODE_COMMAND_DISALLOWED; 5635 } 5636 // still on controller, but scheduled to remove -> re-add 5637 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5638 return ERROR_CODE_SUCCESS; 5639 } 5640 // alloc and add to list 5641 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5642 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5643 entry->address_type = address_type; 5644 (void)memcpy(entry->address, address, 6); 5645 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5646 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5647 return ERROR_CODE_SUCCESS; 5648 } 5649 5650 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5651 btstack_linked_list_iterator_t it; 5652 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5653 while (btstack_linked_list_iterator_has_next(&it)){ 5654 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5655 if (entry->address_type != address_type) { 5656 continue; 5657 } 5658 if (memcmp(entry->address, address, 6) != 0) { 5659 continue; 5660 } 5661 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5662 // remove from controller if already present 5663 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5664 } else { 5665 // directly remove entry from whitelist 5666 btstack_linked_list_iterator_remove(&it); 5667 btstack_memory_whitelist_entry_free(entry); 5668 } 5669 return ERROR_CODE_SUCCESS; 5670 } 5671 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5672 } 5673 5674 static void hci_whitelist_clear(void){ 5675 btstack_linked_list_iterator_t it; 5676 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5677 while (btstack_linked_list_iterator_has_next(&it)){ 5678 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5679 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5680 // remove from controller if already present 5681 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5682 continue; 5683 } 5684 // directly remove entry from whitelist 5685 btstack_linked_list_iterator_remove(&it); 5686 btstack_memory_whitelist_entry_free(entry); 5687 } 5688 } 5689 5690 /** 5691 * @brief Clear Whitelist 5692 * @returns 0 if ok 5693 */ 5694 uint8_t gap_whitelist_clear(void){ 5695 hci_whitelist_clear(); 5696 hci_run(); 5697 return ERROR_CODE_SUCCESS; 5698 } 5699 5700 /** 5701 * @brief Add Device to Whitelist 5702 * @param address_typ 5703 * @param address 5704 * @returns 0 if ok 5705 */ 5706 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5707 uint8_t status = hci_whitelist_add(address_type, address); 5708 if (status){ 5709 return status; 5710 } 5711 hci_run(); 5712 return ERROR_CODE_SUCCESS; 5713 } 5714 5715 /** 5716 * @brief Remove Device from Whitelist 5717 * @param address_typ 5718 * @param address 5719 * @returns 0 if ok 5720 */ 5721 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5722 uint8_t status = hci_whitelist_remove(address_type, address); 5723 if (status){ 5724 return status; 5725 } 5726 hci_run(); 5727 return ERROR_CODE_SUCCESS; 5728 } 5729 5730 #ifdef ENABLE_LE_CENTRAL 5731 /** 5732 * @brief Connect with Whitelist 5733 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5734 * @returns - if ok 5735 */ 5736 uint8_t gap_connect_with_whitelist(void){ 5737 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5738 return ERROR_CODE_COMMAND_DISALLOWED; 5739 } 5740 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5741 hci_run(); 5742 return ERROR_CODE_SUCCESS; 5743 } 5744 5745 /** 5746 * @brief Auto Connection Establishment - Start Connecting to device 5747 * @param address_typ 5748 * @param address 5749 * @returns 0 if ok 5750 */ 5751 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5752 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5753 return ERROR_CODE_COMMAND_DISALLOWED; 5754 } 5755 5756 uint8_t status = hci_whitelist_add(address_type, address); 5757 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5758 return status; 5759 } 5760 5761 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5762 5763 hci_run(); 5764 return ERROR_CODE_SUCCESS; 5765 } 5766 5767 /** 5768 * @brief Auto Connection Establishment - Stop Connecting to device 5769 * @param address_typ 5770 * @param address 5771 * @returns 0 if ok 5772 */ 5773 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5774 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5775 return ERROR_CODE_COMMAND_DISALLOWED; 5776 } 5777 5778 hci_whitelist_remove(address_type, address); 5779 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5780 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5781 } 5782 hci_run(); 5783 return 0; 5784 } 5785 5786 /** 5787 * @brief Auto Connection Establishment - Stop everything 5788 * @note Convenience function to stop all active auto connection attempts 5789 */ 5790 uint8_t gap_auto_connection_stop_all(void){ 5791 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5792 return ERROR_CODE_COMMAND_DISALLOWED; 5793 } 5794 hci_whitelist_clear(); 5795 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5796 hci_run(); 5797 return ERROR_CODE_SUCCESS; 5798 } 5799 5800 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5801 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5802 if (!conn) return 0; 5803 return conn->le_connection_interval; 5804 } 5805 #endif 5806 #endif 5807 5808 #ifdef ENABLE_CLASSIC 5809 /** 5810 * @brief Set Extended Inquiry Response data 5811 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5812 * @note has to be done before stack starts up 5813 */ 5814 void gap_set_extended_inquiry_response(const uint8_t * data){ 5815 hci_stack->eir_data = data; 5816 } 5817 5818 /** 5819 * @brief Start GAP Classic Inquiry 5820 * @param duration in 1.28s units 5821 * @return 0 if ok 5822 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5823 */ 5824 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5825 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5826 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5827 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5828 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5829 } 5830 hci_stack->inquiry_state = duration_in_1280ms_units; 5831 hci_run(); 5832 return 0; 5833 } 5834 5835 /** 5836 * @brief Stop GAP Classic Inquiry 5837 * @returns 0 if ok 5838 */ 5839 int gap_inquiry_stop(void){ 5840 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5841 // emit inquiry complete event, before it even started 5842 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5843 hci_emit_event(event, sizeof(event), 1); 5844 return 0; 5845 } 5846 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5847 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5848 hci_run(); 5849 return 0; 5850 } 5851 5852 5853 /** 5854 * @brief Remote Name Request 5855 * @param addr 5856 * @param page_scan_repetition_mode 5857 * @param clock_offset only used when bit 15 is set 5858 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5859 */ 5860 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5861 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5862 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5863 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5864 hci_stack->remote_name_clock_offset = clock_offset; 5865 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5866 hci_run(); 5867 return 0; 5868 } 5869 5870 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 5871 hci_stack->gap_pairing_state = state; 5872 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5873 hci_run(); 5874 return 0; 5875 } 5876 5877 /** 5878 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5879 * @param addr 5880 * @param pin_data 5881 * @param pin_len 5882 * @return 0 if ok 5883 */ 5884 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5885 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5886 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5887 hci_stack->gap_pairing_pin_len = pin_len; 5888 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5889 } 5890 5891 /** 5892 * @brief Legacy Pairing Pin Code Response 5893 * @param addr 5894 * @param pin 5895 * @return 0 if ok 5896 */ 5897 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 5898 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5899 } 5900 5901 /** 5902 * @brief Abort Legacy Pairing 5903 * @param addr 5904 * @param pin 5905 * @return 0 if ok 5906 */ 5907 int gap_pin_code_negative(bd_addr_t addr){ 5908 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5909 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5910 } 5911 5912 /** 5913 * @brief SSP Passkey Response 5914 * @param addr 5915 * @param passkey 5916 * @return 0 if ok 5917 */ 5918 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 5919 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5920 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5921 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5922 } 5923 5924 /** 5925 * @brief Abort SSP Passkey Entry/Pairing 5926 * @param addr 5927 * @param pin 5928 * @return 0 if ok 5929 */ 5930 int gap_ssp_passkey_negative(const bd_addr_t addr){ 5931 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5932 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5933 } 5934 5935 /** 5936 * @brief Accept SSP Numeric Comparison 5937 * @param addr 5938 * @param passkey 5939 * @return 0 if ok 5940 */ 5941 int gap_ssp_confirmation_response(const bd_addr_t addr){ 5942 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5943 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5944 } 5945 5946 /** 5947 * @brief Abort SSP Numeric Comparison/Pairing 5948 * @param addr 5949 * @param pin 5950 * @return 0 if ok 5951 */ 5952 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 5953 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5954 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5955 } 5956 5957 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 5958 5959 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 5960 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5961 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5962 connectionSetAuthenticationFlags(conn, flag); 5963 hci_run(); 5964 return ERROR_CODE_SUCCESS; 5965 } 5966 5967 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 5968 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 5969 } 5970 5971 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 5972 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5973 } 5974 #endif 5975 5976 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5977 /** 5978 * @brief Report Remote OOB Data 5979 * @param bd_addr 5980 * @param c_192 Simple Pairing Hash C derived from P-192 public key 5981 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 5982 * @param c_256 Simple Pairing Hash C derived from P-256 public key 5983 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 5984 */ 5985 uint8_t gap_ssp_remote_oob_data(const bd_addr_t addr, const uint8_t * c_192, const uint8_t * r_192, const uint8_t * c_256, const uint8_t * r_256){ 5986 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5987 if (connection == NULL) { 5988 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5989 } 5990 connection->classic_oob_c_192 = c_192; 5991 connection->classic_oob_r_192 = r_192; 5992 connection->classic_oob_c_256 = c_256; 5993 connection->classic_oob_r_256 = r_256; 5994 return ERROR_CODE_SUCCESS; 5995 } 5996 /** 5997 * @brief Generate new OOB data 5998 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 5999 */ 6000 void gap_ssp_generate_oob_data(void){ 6001 hci_stack->classic_read_local_oob_data = true; 6002 hci_run(); 6003 } 6004 6005 #endif 6006 6007 /** 6008 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6009 * @param inquiry_mode see bluetooth_defines.h 6010 */ 6011 void hci_set_inquiry_mode(inquiry_mode_t mode){ 6012 hci_stack->inquiry_mode = mode; 6013 } 6014 6015 /** 6016 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6017 */ 6018 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6019 hci_stack->sco_voice_setting = voice_setting; 6020 } 6021 6022 /** 6023 * @brief Get SCO Voice Setting 6024 * @return current voice setting 6025 */ 6026 uint16_t hci_get_sco_voice_setting(void){ 6027 return hci_stack->sco_voice_setting; 6028 } 6029 6030 static int hci_have_usb_transport(void){ 6031 if (!hci_stack->hci_transport) return 0; 6032 const char * transport_name = hci_stack->hci_transport->name; 6033 if (!transport_name) return 0; 6034 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6035 } 6036 6037 /** @brief Get SCO packet length for current SCO Voice setting 6038 * @note Using SCO packets of the exact length is required for USB transfer 6039 * @return Length of SCO packets in bytes (not audio frames) 6040 */ 6041 int hci_get_sco_packet_length(void){ 6042 int sco_packet_length = 0; 6043 6044 #ifdef ENABLE_SCO_OVER_HCI 6045 6046 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6047 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6048 6049 if (hci_have_usb_transport()){ 6050 // see Core Spec for H2 USB Transfer. 6051 // 3 byte SCO header + 24 bytes per connection 6052 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6053 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6054 } else { 6055 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6056 sco_packet_length = 3 + 60 * multiplier; 6057 // assert that it still fits inside an SCO buffer 6058 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6059 sco_packet_length = 3 + 60; 6060 } 6061 } 6062 #endif 6063 return sco_packet_length; 6064 } 6065 6066 /** 6067 * @brief Sets the master/slave policy 6068 * @param policy (0: attempt to become master, 1: let connecting device decide) 6069 */ 6070 void hci_set_master_slave_policy(uint8_t policy){ 6071 hci_stack->master_slave_policy = policy; 6072 } 6073 6074 #endif 6075 6076 HCI_STATE hci_get_state(void){ 6077 return hci_stack->state; 6078 } 6079 6080 #ifdef ENABLE_CLASSIC 6081 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6082 hci_stack->gap_classic_accept_callback = accept_callback; 6083 } 6084 #endif 6085 6086 /** 6087 * @brief Set callback for Bluetooth Hardware Error 6088 */ 6089 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6090 hci_stack->hardware_error_callback = fn; 6091 } 6092 6093 void hci_disconnect_all(void){ 6094 btstack_linked_list_iterator_t it; 6095 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6096 while (btstack_linked_list_iterator_has_next(&it)){ 6097 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6098 if (con->state == SENT_DISCONNECT) continue; 6099 con->state = SEND_DISCONNECT; 6100 } 6101 hci_run(); 6102 } 6103 6104 uint16_t hci_get_manufacturer(void){ 6105 return hci_stack->manufacturer; 6106 } 6107 6108 #ifdef ENABLE_BLE 6109 6110 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6111 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6112 if (!hci_con) return NULL; 6113 return &hci_con->sm_connection; 6114 } 6115 6116 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6117 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6118 6119 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6120 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6121 if (hci_connection == NULL) return 0; 6122 if (hci_is_le_connection(hci_connection)){ 6123 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6124 if (sm_conn->sm_connection_encrypted) { 6125 return sm_conn->sm_actual_encryption_key_size; 6126 } 6127 } 6128 #ifdef ENABLE_CLASSIC 6129 else { 6130 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 6131 return hci_connection->encryption_key_size; 6132 } 6133 } 6134 #endif 6135 return 0; 6136 } 6137 6138 int gap_authenticated(hci_con_handle_t con_handle){ 6139 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6140 if (hci_connection == NULL) return 0; 6141 6142 switch (hci_connection->address_type){ 6143 case BD_ADDR_TYPE_LE_PUBLIC: 6144 case BD_ADDR_TYPE_LE_RANDOM: 6145 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6146 return hci_connection->sm_connection.sm_connection_authenticated; 6147 #ifdef ENABLE_CLASSIC 6148 case BD_ADDR_TYPE_SCO: 6149 case BD_ADDR_TYPE_ACL: 6150 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6151 #endif 6152 default: 6153 return 0; 6154 } 6155 } 6156 6157 int gap_secure_connection(hci_con_handle_t con_handle){ 6158 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6159 if (hci_connection == NULL) return 0; 6160 6161 switch (hci_connection->address_type){ 6162 case BD_ADDR_TYPE_LE_PUBLIC: 6163 case BD_ADDR_TYPE_LE_RANDOM: 6164 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6165 return hci_connection->sm_connection.sm_connection_sc; 6166 #ifdef ENABLE_CLASSIC 6167 case BD_ADDR_TYPE_SCO: 6168 case BD_ADDR_TYPE_ACL: 6169 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6170 #endif 6171 default: 6172 return 0; 6173 } 6174 } 6175 6176 bool gap_bonded(hci_con_handle_t con_handle){ 6177 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6178 if (hci_connection == NULL) return 0; 6179 6180 #ifdef ENABLE_CLASSIC 6181 link_key_t link_key; 6182 link_key_type_t link_key_type; 6183 #endif 6184 switch (hci_connection->address_type){ 6185 case BD_ADDR_TYPE_LE_PUBLIC: 6186 case BD_ADDR_TYPE_LE_RANDOM: 6187 return hci_connection->sm_connection.sm_le_db_index >= 0; 6188 #ifdef ENABLE_CLASSIC 6189 case BD_ADDR_TYPE_SCO: 6190 case BD_ADDR_TYPE_ACL: 6191 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6192 #endif 6193 default: 6194 return false; 6195 } 6196 } 6197 6198 6199 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6200 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6201 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6202 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6203 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6204 return sm_conn->sm_connection_authorization_state; 6205 } 6206 #endif 6207 6208 #ifdef ENABLE_CLASSIC 6209 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){ 6210 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6211 if (!conn) return GAP_CONNECTION_INVALID; 6212 conn->sniff_min_interval = sniff_min_interval; 6213 conn->sniff_max_interval = sniff_max_interval; 6214 conn->sniff_attempt = sniff_attempt; 6215 conn->sniff_timeout = sniff_timeout; 6216 hci_run(); 6217 return 0; 6218 } 6219 6220 /** 6221 * @brief Exit Sniff mode 6222 * @param con_handle 6223 @ @return 0 if ok 6224 */ 6225 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6226 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6227 if (!conn) return GAP_CONNECTION_INVALID; 6228 conn->sniff_min_interval = 0xffff; 6229 hci_run(); 6230 return 0; 6231 } 6232 #endif 6233 6234 void hci_halting_defer(void){ 6235 if (hci_stack->state != HCI_STATE_HALTING) return; 6236 switch (hci_stack->substate){ 6237 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6238 case HCI_HALTING_CLOSE: 6239 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6240 break; 6241 default: 6242 break; 6243 } 6244 } 6245 6246 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6247 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6248 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6249 if (le_device_db_index >= le_device_db_max_count()) return; 6250 uint8_t offset = le_device_db_index >> 3; 6251 uint8_t mask = 1 << (le_device_db_index & 7); 6252 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6253 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6254 // note: go back to remove entries, otherwise, a remove + add will skip the add 6255 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6256 } 6257 } 6258 6259 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6260 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6261 if (le_device_db_index >= le_device_db_max_count()) return; 6262 uint8_t offset = le_device_db_index >> 3; 6263 uint8_t mask = 1 << (le_device_db_index & 7); 6264 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6265 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6266 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6267 } 6268 } 6269 6270 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6271 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6272 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6273 } 6274 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6275 // restart le resolving list update 6276 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6277 } 6278 return ERROR_CODE_SUCCESS; 6279 } 6280 #endif 6281 6282 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6283 void hci_setup_test_connections_fuzz(void){ 6284 hci_connection_t * conn; 6285 6286 // default address: 66:55:44:33:00:01 6287 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6288 6289 // setup Controller info 6290 hci_stack->num_cmd_packets = 255; 6291 hci_stack->acl_packets_total_num = 255; 6292 6293 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6294 addr[5] = 0x01; 6295 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6296 conn->con_handle = addr[5]; 6297 conn->role = HCI_ROLE_SLAVE; 6298 conn->state = RECEIVED_CONNECTION_REQUEST; 6299 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6300 6301 // setup incoming Classic SCO connection with con handle 0x0002 6302 addr[5] = 0x02; 6303 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6304 conn->con_handle = addr[5]; 6305 conn->role = HCI_ROLE_SLAVE; 6306 conn->state = RECEIVED_CONNECTION_REQUEST; 6307 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6308 6309 // setup ready Classic ACL connection with con handle 0x0003 6310 addr[5] = 0x03; 6311 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6312 conn->con_handle = addr[5]; 6313 conn->role = HCI_ROLE_SLAVE; 6314 conn->state = OPEN; 6315 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6316 6317 // setup ready Classic SCO connection with con handle 0x0004 6318 addr[5] = 0x04; 6319 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6320 conn->con_handle = addr[5]; 6321 conn->role = HCI_ROLE_SLAVE; 6322 conn->state = OPEN; 6323 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6324 6325 // setup ready LE ACL connection with con handle 0x005 and public address 6326 addr[5] = 0x05; 6327 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6328 conn->con_handle = addr[5]; 6329 conn->role = HCI_ROLE_SLAVE; 6330 conn->state = OPEN; 6331 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6332 } 6333 6334 void hci_free_connections_fuzz(void){ 6335 btstack_linked_list_iterator_t it; 6336 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6337 while (btstack_linked_list_iterator_has_next(&it)){ 6338 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6339 btstack_linked_list_iterator_remove(&it); 6340 btstack_memory_hci_connection_free(con); 6341 } 6342 } 6343 void hci_simulate_working_fuzz(void){ 6344 hci_init_done(); 6345 hci_stack->num_cmd_packets = 255; 6346 } 6347 #endif 6348