1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_ACTIVE 0x80 115 #define GAP_INQUIRY_STATE_IDLE 0 116 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 117 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 118 119 // GAP Remote Name Request 120 #define GAP_REMOTE_NAME_STATE_IDLE 0 121 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 122 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 123 124 // GAP Pairing 125 #define GAP_PAIRING_STATE_IDLE 0 126 #define GAP_PAIRING_STATE_SEND_PIN 1 127 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 128 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 129 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 130 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 132 133 134 // prototypes 135 #ifdef ENABLE_CLASSIC 136 static void hci_update_scan_enable(void); 137 static void hci_emit_discoverable_enabled(uint8_t enabled); 138 static int hci_local_ssp_activated(void); 139 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 140 static bool hci_ssp_supported(hci_connection_t * connection); 141 static void hci_notify_if_sco_can_send_now(void); 142 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 143 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 144 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 145 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 146 static void hci_connection_timestamp(hci_connection_t *connection); 147 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 148 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 149 #endif 150 151 static int hci_power_control_on(void); 152 static void hci_power_control_off(void); 153 static void hci_state_reset(void); 154 static void hci_emit_transport_packet_sent(void); 155 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 156 static void hci_emit_nr_connections_changed(void); 157 static void hci_emit_hci_open_failed(void); 158 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 159 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 160 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 161 static void hci_run(void); 162 static int hci_is_le_connection(hci_connection_t * connection); 163 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 164 165 #ifdef ENABLE_CLASSIC 166 static int hci_have_usb_transport(void); 167 #endif 168 169 #ifdef ENABLE_BLE 170 #ifdef ENABLE_LE_CENTRAL 171 // called from test/ble_client/advertising_data_parser.c 172 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 173 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 174 static hci_connection_t * gap_get_outgoing_connection(void); 175 #endif 176 #endif 177 178 // the STACK is here 179 #ifndef HAVE_MALLOC 180 static hci_stack_t hci_stack_static; 181 #endif 182 static hci_stack_t * hci_stack = NULL; 183 184 #ifdef ENABLE_CLASSIC 185 // default name 186 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 187 188 // test helper 189 static uint8_t disable_l2cap_timeouts = 0; 190 #endif 191 192 /** 193 * create connection for given address 194 * 195 * @return connection OR NULL, if no memory left 196 */ 197 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 198 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 199 hci_connection_t * conn = btstack_memory_hci_connection_get(); 200 if (!conn) return NULL; 201 bd_addr_copy(conn->address, addr); 202 conn->role = HCI_ROLE_INVALID; 203 conn->address_type = addr_type; 204 conn->con_handle = 0xffff; 205 conn->authentication_flags = AUTH_FLAGS_NONE; 206 conn->bonding_flags = 0; 207 conn->requested_security_level = LEVEL_0; 208 #ifdef ENABLE_CLASSIC 209 conn->request_role = HCI_ROLE_INVALID; 210 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 211 btstack_run_loop_set_timer_context(&conn->timeout, conn); 212 hci_connection_timestamp(conn); 213 #endif 214 conn->acl_recombination_length = 0; 215 conn->acl_recombination_pos = 0; 216 conn->num_packets_sent = 0; 217 218 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 219 #ifdef ENABLE_BLE 220 conn->le_phy_update_all_phys = 0xff; 221 #endif 222 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 223 conn->le_max_tx_octets = 27; 224 #endif 225 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 226 return conn; 227 } 228 229 230 /** 231 * get le connection parameter range 232 * 233 * @return le connection parameter range struct 234 */ 235 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 236 *range = hci_stack->le_connection_parameter_range; 237 } 238 239 /** 240 * set le connection parameter range 241 * 242 */ 243 244 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 245 hci_stack->le_connection_parameter_range = *range; 246 } 247 248 /** 249 * @brief Test if connection parameters are inside in existing rage 250 * @param conn_interval_min (unit: 1.25ms) 251 * @param conn_interval_max (unit: 1.25ms) 252 * @param conn_latency 253 * @param supervision_timeout (unit: 10ms) 254 * @returns 1 if included 255 */ 256 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){ 257 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 258 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 259 260 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 261 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 262 263 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 264 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 265 266 return 1; 267 } 268 269 /** 270 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 271 * @note: default: 1 272 * @param max_peripheral_connections 273 */ 274 #ifdef ENABLE_LE_PERIPHERAL 275 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 276 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 277 } 278 #endif 279 280 /** 281 * get hci connections iterator 282 * 283 * @return hci connections iterator 284 */ 285 286 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 287 btstack_linked_list_iterator_init(it, &hci_stack->connections); 288 } 289 290 /** 291 * get connection for a given handle 292 * 293 * @return connection OR NULL, if not found 294 */ 295 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 296 btstack_linked_list_iterator_t it; 297 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 298 while (btstack_linked_list_iterator_has_next(&it)){ 299 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 300 if ( item->con_handle == con_handle ) { 301 return item; 302 } 303 } 304 return NULL; 305 } 306 307 /** 308 * get connection for given address 309 * 310 * @return connection OR NULL, if not found 311 */ 312 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 313 btstack_linked_list_iterator_t it; 314 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 315 while (btstack_linked_list_iterator_has_next(&it)){ 316 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 317 if (connection->address_type != addr_type) continue; 318 if (memcmp(addr, connection->address, 6) != 0) continue; 319 return connection; 320 } 321 return NULL; 322 } 323 324 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 325 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 326 } 327 328 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 329 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 330 } 331 332 #ifdef ENABLE_CLASSIC 333 334 #ifdef ENABLE_SCO_OVER_HCI 335 static int hci_number_sco_connections(void){ 336 int connections = 0; 337 btstack_linked_list_iterator_t it; 338 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 339 while (btstack_linked_list_iterator_has_next(&it)){ 340 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 341 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 342 connections++; 343 } 344 return connections; 345 } 346 #endif 347 348 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 349 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 350 #ifdef HAVE_EMBEDDED_TICK 351 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 352 // connections might be timed out 353 hci_emit_l2cap_check_timeout(connection); 354 } 355 #else 356 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 357 // connections might be timed out 358 hci_emit_l2cap_check_timeout(connection); 359 } 360 #endif 361 } 362 363 static void hci_connection_timestamp(hci_connection_t *connection){ 364 #ifdef HAVE_EMBEDDED_TICK 365 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 366 #else 367 connection->timestamp = btstack_run_loop_get_time_ms(); 368 #endif 369 } 370 371 /** 372 * add authentication flags and reset timer 373 * @note: assumes classic connection 374 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 375 */ 376 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 377 bd_addr_t addr; 378 reverse_bd_addr(bd_addr, addr); 379 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 380 if (conn) { 381 connectionSetAuthenticationFlags(conn, flags); 382 hci_connection_timestamp(conn); 383 } 384 } 385 386 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 387 hci_connection_t * conn = hci_connection_for_handle(handle); 388 if (!conn) return 0; 389 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 390 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 391 return 0; 392 } 393 394 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 395 if (!hci_stack->link_key_db) return; 396 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 397 hci_stack->link_key_db->delete_link_key(addr); 398 } 399 400 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 401 if (!hci_stack->link_key_db) return; 402 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 403 hci_stack->link_key_db->put_link_key(addr, link_key, type); 404 } 405 406 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 407 if (!hci_stack->link_key_db) return false; 408 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 409 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 410 return result; 411 } 412 413 void gap_delete_all_link_keys(void){ 414 bd_addr_t addr; 415 link_key_t link_key; 416 link_key_type_t type; 417 btstack_link_key_iterator_t it; 418 int ok = gap_link_key_iterator_init(&it); 419 if (!ok) { 420 log_error("could not initialize iterator"); 421 return; 422 } 423 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 424 gap_drop_link_key_for_bd_addr(addr); 425 } 426 gap_link_key_iterator_done(&it); 427 } 428 429 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 430 if (!hci_stack->link_key_db) return 0; 431 if (!hci_stack->link_key_db->iterator_init) return 0; 432 return hci_stack->link_key_db->iterator_init(it); 433 } 434 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){ 435 if (!hci_stack->link_key_db) return 0; 436 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 437 } 438 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 439 if (!hci_stack->link_key_db) return; 440 hci_stack->link_key_db->iterator_done(it); 441 } 442 #endif 443 444 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 445 switch (address_type){ 446 case BD_ADDR_TYPE_LE_PUBLIC: 447 case BD_ADDR_TYPE_LE_RANDOM: 448 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 449 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 450 return true; 451 default: 452 return false; 453 } 454 } 455 456 static int hci_is_le_connection(hci_connection_t * connection){ 457 return hci_is_le_connection_type(connection->address_type); 458 } 459 460 /** 461 * count connections 462 */ 463 static int nr_hci_connections(void){ 464 int count = 0; 465 btstack_linked_item_t *it; 466 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 467 count++; 468 } 469 return count; 470 } 471 472 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 473 474 unsigned int num_packets_sent_classic = 0; 475 unsigned int num_packets_sent_le = 0; 476 477 btstack_linked_item_t *it; 478 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 479 hci_connection_t * connection = (hci_connection_t *) it; 480 if (hci_is_le_connection(connection)){ 481 num_packets_sent_le += connection->num_packets_sent; 482 } 483 if (connection->address_type == BD_ADDR_TYPE_ACL){ 484 num_packets_sent_classic += connection->num_packets_sent; 485 } 486 } 487 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 488 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 489 int free_slots_le = 0; 490 491 if (free_slots_classic < 0){ 492 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); 493 return 0; 494 } 495 496 if (hci_stack->le_acl_packets_total_num){ 497 // if we have LE slots, they are used 498 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 499 if (free_slots_le < 0){ 500 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); 501 return 0; 502 } 503 } else { 504 // otherwise, classic slots are used for LE, too 505 free_slots_classic -= num_packets_sent_le; 506 if (free_slots_classic < 0){ 507 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); 508 return 0; 509 } 510 } 511 512 switch (address_type){ 513 case BD_ADDR_TYPE_UNKNOWN: 514 log_error("hci_number_free_acl_slots: unknown address type"); 515 return 0; 516 517 case BD_ADDR_TYPE_ACL: 518 return free_slots_classic; 519 520 default: 521 if (hci_stack->le_acl_packets_total_num){ 522 return free_slots_le; 523 } 524 return free_slots_classic; 525 } 526 } 527 528 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 529 // get connection type 530 hci_connection_t * connection = hci_connection_for_handle(con_handle); 531 if (!connection){ 532 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 533 return 0; 534 } 535 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 536 } 537 538 #ifdef ENABLE_CLASSIC 539 static int hci_number_free_sco_slots(void){ 540 unsigned int num_sco_packets_sent = 0; 541 btstack_linked_item_t *it; 542 if (hci_stack->synchronous_flow_control_enabled){ 543 // explicit flow control 544 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 545 hci_connection_t * connection = (hci_connection_t *) it; 546 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 547 num_sco_packets_sent += connection->num_packets_sent; 548 } 549 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 550 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 551 return 0; 552 } 553 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 554 } else { 555 // implicit flow control -- TODO 556 int num_ready = 0; 557 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 558 hci_connection_t * connection = (hci_connection_t *) it; 559 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 560 if (connection->sco_tx_ready == 0) continue; 561 num_ready++; 562 } 563 return num_ready; 564 } 565 } 566 #endif 567 568 // only used to send HCI Host Number Completed Packets 569 static int hci_can_send_comand_packet_transport(void){ 570 if (hci_stack->hci_packet_buffer_reserved) return 0; 571 572 // check for async hci transport implementations 573 if (hci_stack->hci_transport->can_send_packet_now){ 574 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 575 return 0; 576 } 577 } 578 return 1; 579 } 580 581 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 582 int hci_can_send_command_packet_now(void){ 583 if (hci_can_send_comand_packet_transport() == 0) return 0; 584 return hci_stack->num_cmd_packets > 0u; 585 } 586 587 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 588 // check for async hci transport implementations 589 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 590 return hci_stack->hci_transport->can_send_packet_now(packet_type); 591 } 592 593 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 594 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 595 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 596 } 597 598 int hci_can_send_acl_le_packet_now(void){ 599 if (hci_stack->hci_packet_buffer_reserved) return 0; 600 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 601 } 602 603 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 604 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 605 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 606 } 607 608 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 609 if (hci_stack->hci_packet_buffer_reserved) return 0; 610 return hci_can_send_prepared_acl_packet_now(con_handle); 611 } 612 613 #ifdef ENABLE_CLASSIC 614 int hci_can_send_acl_classic_packet_now(void){ 615 if (hci_stack->hci_packet_buffer_reserved) return 0; 616 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 617 } 618 619 int hci_can_send_prepared_sco_packet_now(void){ 620 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 621 if (hci_have_usb_transport()){ 622 return hci_stack->sco_can_send_now; 623 } else { 624 return hci_number_free_sco_slots() > 0; 625 } 626 } 627 628 int hci_can_send_sco_packet_now(void){ 629 if (hci_stack->hci_packet_buffer_reserved) return 0; 630 return hci_can_send_prepared_sco_packet_now(); 631 } 632 633 void hci_request_sco_can_send_now_event(void){ 634 hci_stack->sco_waiting_for_can_send_now = 1; 635 hci_notify_if_sco_can_send_now(); 636 } 637 #endif 638 639 // used for internal checks in l2cap.c 640 int hci_is_packet_buffer_reserved(void){ 641 return hci_stack->hci_packet_buffer_reserved; 642 } 643 644 // reserves outgoing packet buffer. @returns 1 if successful 645 int hci_reserve_packet_buffer(void){ 646 if (hci_stack->hci_packet_buffer_reserved) { 647 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 648 return 0; 649 } 650 hci_stack->hci_packet_buffer_reserved = 1; 651 return 1; 652 } 653 654 void hci_release_packet_buffer(void){ 655 hci_stack->hci_packet_buffer_reserved = 0; 656 } 657 658 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 659 static int hci_transport_synchronous(void){ 660 return hci_stack->hci_transport->can_send_packet_now == NULL; 661 } 662 663 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 664 665 // 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); 666 667 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 668 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 669 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 670 max_acl_data_packet_length = hci_stack->le_data_packets_length; 671 } 672 673 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 674 if (hci_is_le_connection(connection)){ 675 max_acl_data_packet_length = connection->le_max_tx_octets; 676 } 677 #endif 678 679 log_debug("hci_send_acl_packet_fragments entered"); 680 681 int err; 682 // multiple packets could be send on a synchronous HCI transport 683 while (true){ 684 685 log_debug("hci_send_acl_packet_fragments loop entered"); 686 687 // get current data 688 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 689 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 690 bool more_fragments = false; 691 692 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 693 if (current_acl_data_packet_length > max_acl_data_packet_length){ 694 more_fragments = true; 695 current_acl_data_packet_length = max_acl_data_packet_length; 696 } 697 698 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 699 if (acl_header_pos > 0u){ 700 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 701 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 702 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 703 } 704 705 // update header len 706 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 707 708 // count packet 709 connection->num_packets_sent++; 710 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 711 712 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 713 if (more_fragments){ 714 // update start of next fragment to send 715 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 716 } else { 717 // done 718 hci_stack->acl_fragmentation_pos = 0; 719 hci_stack->acl_fragmentation_total_size = 0; 720 } 721 722 // send packet 723 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 724 const int size = current_acl_data_packet_length + 4; 725 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 726 hci_stack->acl_fragmentation_tx_active = 1; 727 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 728 729 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 730 731 // done yet? 732 if (!more_fragments) break; 733 734 // can send more? 735 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 736 } 737 738 log_debug("hci_send_acl_packet_fragments loop over"); 739 740 // release buffer now for synchronous transport 741 if (hci_transport_synchronous()){ 742 hci_stack->acl_fragmentation_tx_active = 0; 743 hci_release_packet_buffer(); 744 hci_emit_transport_packet_sent(); 745 } 746 747 return err; 748 } 749 750 // pre: caller has reserved the packet buffer 751 int hci_send_acl_packet_buffer(int size){ 752 753 // log_info("hci_send_acl_packet_buffer size %u", size); 754 755 if (!hci_stack->hci_packet_buffer_reserved) { 756 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 757 return 0; 758 } 759 760 uint8_t * packet = hci_stack->hci_packet_buffer; 761 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 762 763 // check for free places on Bluetooth module 764 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 765 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 766 hci_release_packet_buffer(); 767 hci_emit_transport_packet_sent(); 768 return BTSTACK_ACL_BUFFERS_FULL; 769 } 770 771 hci_connection_t *connection = hci_connection_for_handle( con_handle); 772 if (!connection) { 773 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 774 hci_release_packet_buffer(); 775 hci_emit_transport_packet_sent(); 776 return 0; 777 } 778 779 #ifdef ENABLE_CLASSIC 780 hci_connection_timestamp(connection); 781 #endif 782 783 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 784 785 // setup data 786 hci_stack->acl_fragmentation_total_size = size; 787 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 788 789 return hci_send_acl_packet_fragments(connection); 790 } 791 792 #ifdef ENABLE_CLASSIC 793 // pre: caller has reserved the packet buffer 794 int hci_send_sco_packet_buffer(int size){ 795 796 // log_info("hci_send_acl_packet_buffer size %u", size); 797 798 if (!hci_stack->hci_packet_buffer_reserved) { 799 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 800 return 0; 801 } 802 803 uint8_t * packet = hci_stack->hci_packet_buffer; 804 805 // skip checks in loopback mode 806 if (!hci_stack->loopback_mode){ 807 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 808 809 // check for free places on Bluetooth module 810 if (!hci_can_send_prepared_sco_packet_now()) { 811 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 812 hci_release_packet_buffer(); 813 hci_emit_transport_packet_sent(); 814 return BTSTACK_ACL_BUFFERS_FULL; 815 } 816 817 // track send packet in connection struct 818 hci_connection_t *connection = hci_connection_for_handle( con_handle); 819 if (!connection) { 820 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 821 hci_release_packet_buffer(); 822 hci_emit_transport_packet_sent(); 823 return 0; 824 } 825 826 if (hci_have_usb_transport()){ 827 // token used 828 hci_stack->sco_can_send_now = 0; 829 } else { 830 if (hci_stack->synchronous_flow_control_enabled){ 831 connection->num_packets_sent++; 832 } else { 833 connection->sco_tx_ready--; 834 } 835 } 836 } 837 838 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 839 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 840 841 if (hci_transport_synchronous()){ 842 hci_release_packet_buffer(); 843 hci_emit_transport_packet_sent(); 844 } 845 846 return err; 847 } 848 #endif 849 850 static void acl_handler(uint8_t *packet, uint16_t size){ 851 852 // get info 853 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 854 hci_connection_t *conn = hci_connection_for_handle(con_handle); 855 uint8_t acl_flags = READ_ACL_FLAGS(packet); 856 uint16_t acl_length = READ_ACL_LENGTH(packet); 857 858 // ignore non-registered handle 859 if (!conn){ 860 log_error("acl_handler called with non-registered handle %u!" , con_handle); 861 return; 862 } 863 864 // assert packet is complete 865 if ((acl_length + 4u) != size){ 866 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 867 return; 868 } 869 870 #ifdef ENABLE_CLASSIC 871 // update idle timestamp 872 hci_connection_timestamp(conn); 873 #endif 874 875 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 876 hci_stack->host_completed_packets = 1; 877 conn->num_packets_completed++; 878 #endif 879 880 // handle different packet types 881 switch (acl_flags & 0x03u) { 882 883 case 0x01: // continuation fragment 884 885 // sanity checks 886 if (conn->acl_recombination_pos == 0u) { 887 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 888 return; 889 } 890 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 891 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 892 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 893 conn->acl_recombination_pos = 0; 894 return; 895 } 896 897 // append fragment payload (header already stored) 898 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 899 &packet[4], acl_length); 900 conn->acl_recombination_pos += acl_length; 901 902 // forward complete L2CAP packet if complete. 903 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 904 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 905 // reset recombination buffer 906 conn->acl_recombination_length = 0; 907 conn->acl_recombination_pos = 0; 908 } 909 break; 910 911 case 0x02: { // first fragment 912 913 // sanity check 914 if (conn->acl_recombination_pos) { 915 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 916 conn->acl_recombination_pos = 0; 917 } 918 919 // peek into L2CAP packet! 920 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 921 922 // compare fragment size to L2CAP packet size 923 if (acl_length >= (l2cap_length + 4u)){ 924 // forward fragment as L2CAP packet 925 hci_emit_acl_packet(packet, acl_length + 4u); 926 } else { 927 928 if (acl_length > HCI_ACL_BUFFER_SIZE){ 929 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 930 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 931 return; 932 } 933 934 // store first fragment and tweak acl length for complete package 935 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 936 packet, acl_length + 4u); 937 conn->acl_recombination_pos = acl_length + 4u; 938 conn->acl_recombination_length = l2cap_length; 939 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 940 } 941 break; 942 943 } 944 default: 945 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 946 return; 947 } 948 949 // execute main loop 950 hci_run(); 951 } 952 953 static void hci_shutdown_connection(hci_connection_t *conn){ 954 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 955 956 #ifdef ENABLE_CLASSIC 957 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 958 bd_addr_type_t addr_type = conn->address_type; 959 #endif 960 #ifdef HAVE_SCO_TRANSPORT 961 hci_con_handle_t con_handle = conn->con_handle; 962 #endif 963 #endif 964 965 btstack_run_loop_remove_timer(&conn->timeout); 966 967 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 968 btstack_memory_hci_connection_free( conn ); 969 970 // now it's gone 971 hci_emit_nr_connections_changed(); 972 973 #ifdef ENABLE_CLASSIC 974 #ifdef ENABLE_SCO_OVER_HCI 975 // update SCO 976 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 977 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 978 } 979 #endif 980 #ifdef HAVE_SCO_TRANSPORT 981 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 982 hci_stack->sco_transport->close(con_handle); 983 } 984 #endif 985 #endif 986 } 987 988 #ifdef ENABLE_CLASSIC 989 990 static const uint16_t packet_type_sizes[] = { 991 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 992 HCI_ACL_DH1_SIZE, 0, 0, 0, 993 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 994 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 995 }; 996 static const uint8_t packet_type_feature_requirement_bit[] = { 997 0, // 3 slot packets 998 1, // 5 slot packets 999 25, // EDR 2 mpbs 1000 26, // EDR 3 mbps 1001 39, // 3 slot EDR packts 1002 40, // 5 slot EDR packet 1003 }; 1004 static const uint16_t packet_type_feature_packet_mask[] = { 1005 0x0f00, // 3 slot packets 1006 0xf000, // 5 slot packets 1007 0x1102, // EDR 2 mpbs 1008 0x2204, // EDR 3 mbps 1009 0x0300, // 3 slot EDR packts 1010 0x3000, // 5 slot EDR packet 1011 }; 1012 1013 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1014 // enable packet types based on size 1015 uint16_t packet_types = 0; 1016 unsigned int i; 1017 for (i=0;i<16;i++){ 1018 if (packet_type_sizes[i] == 0) continue; 1019 if (packet_type_sizes[i] <= buffer_size){ 1020 packet_types |= 1 << i; 1021 } 1022 } 1023 // disable packet types due to missing local supported features 1024 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1025 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1026 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1027 if (feature_set) continue; 1028 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1029 packet_types &= ~packet_type_feature_packet_mask[i]; 1030 } 1031 // flip bits for "may not be used" 1032 packet_types ^= 0x3306; 1033 return packet_types; 1034 } 1035 1036 uint16_t hci_usable_acl_packet_types(void){ 1037 return hci_stack->packet_types; 1038 } 1039 #endif 1040 1041 uint8_t* hci_get_outgoing_packet_buffer(void){ 1042 // hci packet buffer is >= acl data packet length 1043 return hci_stack->hci_packet_buffer; 1044 } 1045 1046 uint16_t hci_max_acl_data_packet_length(void){ 1047 return hci_stack->acl_data_packet_length; 1048 } 1049 1050 #ifdef ENABLE_CLASSIC 1051 int hci_extended_sco_link_supported(void){ 1052 // No. 31, byte 3, bit 7 1053 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1054 } 1055 #endif 1056 1057 int hci_non_flushable_packet_boundary_flag_supported(void){ 1058 // No. 54, byte 6, bit 6 1059 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1060 } 1061 1062 static int gap_ssp_supported(void){ 1063 // No. 51, byte 6, bit 3 1064 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1065 } 1066 1067 static int hci_classic_supported(void){ 1068 #ifdef ENABLE_CLASSIC 1069 // No. 37, byte 4, bit 5, = No BR/EDR Support 1070 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1071 #else 1072 return 0; 1073 #endif 1074 } 1075 1076 static int hci_le_supported(void){ 1077 #ifdef ENABLE_BLE 1078 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1079 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1080 #else 1081 return 0; 1082 #endif 1083 } 1084 1085 #ifdef ENABLE_BLE 1086 1087 /** 1088 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1089 */ 1090 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1091 *addr_type = hci_stack->le_own_addr_type; 1092 if (hci_stack->le_own_addr_type){ 1093 (void)memcpy(addr, hci_stack->le_random_address, 6); 1094 } else { 1095 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1096 } 1097 } 1098 1099 #ifdef ENABLE_LE_CENTRAL 1100 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1101 1102 int offset = 3; 1103 int num_reports = packet[offset]; 1104 offset += 1; 1105 1106 int i; 1107 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1108 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1109 for (i=0; (i<num_reports) && (offset < size);i++){ 1110 // sanity checks on data_length: 1111 uint8_t data_length = packet[offset + 8]; 1112 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1113 if ((offset + 9u + data_length + 1u) > size) return; 1114 // setup event 1115 uint8_t event_size = 10u + data_length; 1116 int pos = 0; 1117 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1118 event[pos++] = event_size; 1119 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1120 offset += 8; 1121 pos += 8; 1122 event[pos++] = packet[offset + 1 + data_length]; // rssi 1123 event[pos++] = data_length; 1124 offset++; 1125 (void)memcpy(&event[pos], &packet[offset], data_length); 1126 pos += data_length; 1127 offset += data_length + 1u; // rssi 1128 hci_emit_event(event, pos, 1); 1129 } 1130 } 1131 #endif 1132 #endif 1133 1134 #ifdef ENABLE_BLE 1135 #ifdef ENABLE_LE_PERIPHERAL 1136 static void hci_update_advertisements_enabled_for_current_roles(void){ 1137 if (hci_stack->le_advertisements_enabled){ 1138 // get number of active le slave connections 1139 int num_slave_connections = 0; 1140 btstack_linked_list_iterator_t it; 1141 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1142 while (btstack_linked_list_iterator_has_next(&it)){ 1143 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1144 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1145 if (con->state != OPEN) continue; 1146 if (con->role != HCI_ROLE_SLAVE) continue; 1147 if (!hci_is_le_connection(con)) continue; 1148 num_slave_connections++; 1149 } 1150 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1151 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1152 } else { 1153 hci_stack->le_advertisements_enabled_for_current_roles = false; 1154 } 1155 } 1156 #endif 1157 #endif 1158 1159 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1160 1161 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1162 if (!hci_stack->config) return 0; 1163 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1164 // Limit baud rate for Broadcom chipsets to 3 mbps 1165 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1166 baud_rate = 3000000; 1167 } 1168 return baud_rate; 1169 } 1170 1171 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1172 UNUSED(ds); 1173 1174 switch (hci_stack->substate){ 1175 case HCI_INIT_W4_SEND_RESET: 1176 log_info("Resend HCI Reset"); 1177 hci_stack->substate = HCI_INIT_SEND_RESET; 1178 hci_stack->num_cmd_packets = 1; 1179 hci_run(); 1180 break; 1181 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1182 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1183 if (hci_stack->hci_transport->reset_link){ 1184 hci_stack->hci_transport->reset_link(); 1185 } 1186 1187 /* fall through */ 1188 1189 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1190 log_info("Resend HCI Reset - CSR Warm Boot"); 1191 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1192 hci_stack->num_cmd_packets = 1; 1193 hci_run(); 1194 break; 1195 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1196 if (hci_stack->hci_transport->set_baudrate){ 1197 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1198 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1199 hci_stack->hci_transport->set_baudrate(baud_rate); 1200 } 1201 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1202 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1203 if (hci_stack->hci_transport->reset_link){ 1204 log_info("Link Reset"); 1205 hci_stack->hci_transport->reset_link(); 1206 } 1207 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1208 hci_run(); 1209 } 1210 break; 1211 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1212 // otherwise continue 1213 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1214 hci_send_cmd(&hci_read_local_supported_commands); 1215 break; 1216 default: 1217 break; 1218 } 1219 } 1220 #endif 1221 1222 static void hci_initializing_next_state(void){ 1223 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1224 } 1225 1226 // assumption: hci_can_send_command_packet_now() == true 1227 static void hci_initializing_run(void){ 1228 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1229 switch (hci_stack->substate){ 1230 case HCI_INIT_SEND_RESET: 1231 hci_state_reset(); 1232 1233 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1234 // prepare reset if command complete not received in 100ms 1235 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1236 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1237 btstack_run_loop_add_timer(&hci_stack->timeout); 1238 #endif 1239 // send command 1240 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1241 hci_send_cmd(&hci_reset); 1242 break; 1243 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1244 hci_send_cmd(&hci_read_local_version_information); 1245 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1246 break; 1247 case HCI_INIT_SEND_READ_LOCAL_NAME: 1248 hci_send_cmd(&hci_read_local_name); 1249 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1250 break; 1251 1252 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1253 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1254 hci_state_reset(); 1255 // prepare reset if command complete not received in 100ms 1256 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1257 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1258 btstack_run_loop_add_timer(&hci_stack->timeout); 1259 // send command 1260 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1261 hci_send_cmd(&hci_reset); 1262 break; 1263 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1264 hci_state_reset(); 1265 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1266 hci_send_cmd(&hci_reset); 1267 break; 1268 case HCI_INIT_SEND_BAUD_CHANGE: { 1269 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1270 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1271 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1272 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1273 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1274 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1275 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1276 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1277 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1278 btstack_run_loop_add_timer(&hci_stack->timeout); 1279 } 1280 break; 1281 } 1282 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1283 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1284 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1285 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1286 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1287 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1288 break; 1289 } 1290 case HCI_INIT_CUSTOM_INIT: 1291 // Custom initialization 1292 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1293 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1294 bool send_cmd = false; 1295 switch (hci_stack->chipset_result){ 1296 case BTSTACK_CHIPSET_VALID_COMMAND: 1297 send_cmd = true; 1298 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1299 break; 1300 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1301 send_cmd = true; 1302 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1303 log_info("CSR Warm Boot"); 1304 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1305 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1306 btstack_run_loop_add_timer(&hci_stack->timeout); 1307 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1308 && hci_stack->config 1309 && hci_stack->chipset 1310 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1311 && hci_stack->hci_transport->set_baudrate 1312 && hci_transport_uart_get_main_baud_rate()){ 1313 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1314 } else { 1315 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1316 } 1317 break; 1318 default: 1319 break; 1320 } 1321 1322 if (send_cmd){ 1323 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1324 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1325 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1326 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1327 break; 1328 } 1329 log_info("Init script done"); 1330 1331 // Init script download on Broadcom chipsets causes: 1332 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1333 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1334 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1335 1336 // - baud rate to reset, restore UART baud rate if needed 1337 int need_baud_change = hci_stack->config 1338 && hci_stack->chipset 1339 && hci_stack->chipset->set_baudrate_command 1340 && hci_stack->hci_transport->set_baudrate 1341 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1342 if (need_baud_change) { 1343 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1344 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1345 hci_stack->hci_transport->set_baudrate(baud_rate); 1346 } 1347 1348 uint16_t bcm_delay_ms = 300; 1349 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1350 // -> Work around: wait here. 1351 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1352 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1353 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1354 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1355 btstack_run_loop_add_timer(&hci_stack->timeout); 1356 break; 1357 } 1358 } 1359 // otherwise continue 1360 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1361 hci_send_cmd(&hci_read_local_supported_commands); 1362 break; 1363 case HCI_INIT_SET_BD_ADDR: 1364 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1365 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1366 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1367 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1368 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1369 break; 1370 #endif 1371 1372 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1373 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1374 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1375 hci_send_cmd(&hci_read_local_supported_commands); 1376 break; 1377 case HCI_INIT_READ_BD_ADDR: 1378 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1379 hci_send_cmd(&hci_read_bd_addr); 1380 break; 1381 case HCI_INIT_READ_BUFFER_SIZE: 1382 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1383 hci_send_cmd(&hci_read_buffer_size); 1384 break; 1385 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1386 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1387 hci_send_cmd(&hci_read_local_supported_features); 1388 break; 1389 1390 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1391 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1392 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1393 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1394 break; 1395 case HCI_INIT_HOST_BUFFER_SIZE: 1396 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1397 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1398 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1399 break; 1400 #endif 1401 1402 case HCI_INIT_SET_EVENT_MASK: 1403 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1404 if (hci_le_supported()){ 1405 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1406 } else { 1407 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1408 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1409 } 1410 break; 1411 1412 #ifdef ENABLE_CLASSIC 1413 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1414 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1415 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1416 break; 1417 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1418 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1419 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1420 break; 1421 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1422 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1423 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1424 break; 1425 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1426 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1427 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1428 break; 1429 case HCI_INIT_WRITE_LOCAL_NAME: { 1430 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1431 hci_reserve_packet_buffer(); 1432 uint8_t * packet = hci_stack->hci_packet_buffer; 1433 // construct HCI Command and send 1434 uint16_t opcode = hci_write_local_name.opcode; 1435 hci_stack->last_cmd_opcode = opcode; 1436 packet[0] = opcode & 0xff; 1437 packet[1] = opcode >> 8; 1438 packet[2] = DEVICE_NAME_LEN; 1439 memset(&packet[3], 0, DEVICE_NAME_LEN); 1440 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1441 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1442 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1443 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1444 // expand '00:00:00:00:00:00' in name with bd_addr 1445 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1446 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1447 break; 1448 } 1449 case HCI_INIT_WRITE_EIR_DATA: { 1450 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1451 hci_reserve_packet_buffer(); 1452 uint8_t * packet = hci_stack->hci_packet_buffer; 1453 // construct HCI Command in-place and send 1454 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1455 hci_stack->last_cmd_opcode = opcode; 1456 uint16_t offset = 0; 1457 packet[offset++] = opcode & 0xff; 1458 packet[offset++] = opcode >> 8; 1459 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1460 packet[offset++] = 0; // FEC not required 1461 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1462 if (hci_stack->eir_data){ 1463 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1464 ad_context_t context; 1465 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1466 uint8_t data_type = ad_iterator_get_data_type(&context); 1467 uint8_t size = ad_iterator_get_data_len(&context); 1468 const uint8_t *data = ad_iterator_get_data(&context); 1469 // copy item 1470 packet[offset++] = size + 1; 1471 packet[offset++] = data_type; 1472 memcpy(&packet[offset], data, size); 1473 // update name item 1474 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1475 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1476 } 1477 offset += size; 1478 } 1479 } else { 1480 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1481 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1482 packet[offset++] = bytes_to_copy + 1; 1483 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1484 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1485 // expand '00:00:00:00:00:00' in name with bd_addr 1486 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1487 } 1488 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1489 break; 1490 } 1491 case HCI_INIT_WRITE_INQUIRY_MODE: 1492 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1493 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1494 break; 1495 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1496 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1497 hci_stack->secure_connections_active = true; 1498 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1499 break; 1500 case HCI_INIT_WRITE_SCAN_ENABLE: 1501 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1502 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1503 break; 1504 // only sent if ENABLE_SCO_OVER_HCI is defined 1505 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1506 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1507 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1508 break; 1509 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1510 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1511 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1512 break; 1513 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1514 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1515 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1516 #ifdef ENABLE_SCO_OVER_HCI 1517 log_info("BCM: Route SCO data via HCI transport"); 1518 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1519 #endif 1520 #ifdef ENABLE_SCO_OVER_PCM 1521 log_info("BCM: Route SCO data via PCM interface"); 1522 #ifdef ENABLE_BCM_PCM_WBS 1523 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1524 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1525 #else 1526 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1527 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1528 #endif 1529 #endif 1530 break; 1531 #ifdef ENABLE_SCO_OVER_PCM 1532 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1533 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1534 log_info("BCM: Config PCM interface for I2S"); 1535 #ifdef ENABLE_BCM_PCM_WBS 1536 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1537 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1538 #else 1539 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1540 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1541 #endif 1542 break; 1543 #endif 1544 #endif 1545 1546 #ifdef ENABLE_BLE 1547 // LE INIT 1548 case HCI_INIT_LE_READ_BUFFER_SIZE: 1549 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1550 hci_send_cmd(&hci_le_read_buffer_size); 1551 break; 1552 case HCI_INIT_LE_SET_EVENT_MASK: 1553 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1554 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1555 break; 1556 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1557 // LE Supported Host = 1, Simultaneous Host = 0 1558 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1559 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1560 break; 1561 #endif 1562 1563 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1564 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1565 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1566 hci_send_cmd(&hci_le_read_maximum_data_length); 1567 break; 1568 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1569 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1570 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1571 break; 1572 #endif 1573 1574 #ifdef ENABLE_LE_CENTRAL 1575 case HCI_INIT_READ_WHITE_LIST_SIZE: 1576 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1577 hci_send_cmd(&hci_le_read_white_list_size); 1578 break; 1579 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1580 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1581 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); 1582 break; 1583 #endif 1584 default: 1585 return; 1586 } 1587 } 1588 1589 static void hci_init_done(void){ 1590 // done. tell the app 1591 log_info("hci_init_done -> HCI_STATE_WORKING"); 1592 hci_stack->state = HCI_STATE_WORKING; 1593 hci_emit_state(); 1594 hci_run(); 1595 } 1596 1597 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1598 bool command_completed = false; 1599 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1600 uint16_t opcode = little_endian_read_16(packet,3); 1601 if (opcode == hci_stack->last_cmd_opcode){ 1602 command_completed = true; 1603 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1604 } else { 1605 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1606 } 1607 } 1608 1609 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1610 uint8_t status = packet[2]; 1611 uint16_t opcode = little_endian_read_16(packet,4); 1612 if (opcode == hci_stack->last_cmd_opcode){ 1613 if (status){ 1614 command_completed = true; 1615 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1616 } else { 1617 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1618 } 1619 } else { 1620 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1621 } 1622 } 1623 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1624 // Vendor == CSR 1625 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1626 // TODO: track actual command 1627 command_completed = true; 1628 } 1629 1630 // Vendor == Toshiba 1631 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1632 // TODO: track actual command 1633 command_completed = true; 1634 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1635 hci_stack->num_cmd_packets = 1; 1636 } 1637 #endif 1638 1639 return command_completed; 1640 } 1641 1642 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1643 1644 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1645 1646 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1647 1648 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1649 1650 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1651 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1652 // 1653 // HCI Reset 1654 // Timeout 100 ms 1655 // HCI Reset 1656 // Command Complete Reset 1657 // HCI Read Local Version Information 1658 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1659 // hang... 1660 // 1661 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1662 if (!command_completed 1663 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1664 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1665 1666 uint16_t opcode = little_endian_read_16(packet,3); 1667 if (opcode == hci_reset.opcode){ 1668 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1669 return; 1670 } 1671 } 1672 1673 // CSR & H5 1674 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1675 if (!command_completed 1676 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1677 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1678 1679 uint16_t opcode = little_endian_read_16(packet,3); 1680 if (opcode == hci_reset.opcode){ 1681 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1682 return; 1683 } 1684 } 1685 1686 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1687 // fix: Correct substate and behave as command below 1688 if (command_completed){ 1689 switch (hci_stack->substate){ 1690 case HCI_INIT_SEND_RESET: 1691 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1692 break; 1693 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1694 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1695 break; 1696 default: 1697 break; 1698 } 1699 } 1700 1701 #endif 1702 1703 if (!command_completed) return; 1704 1705 bool need_baud_change = false; 1706 bool need_addr_change = false; 1707 1708 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1709 need_baud_change = hci_stack->config 1710 && hci_stack->chipset 1711 && hci_stack->chipset->set_baudrate_command 1712 && hci_stack->hci_transport->set_baudrate 1713 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1714 1715 need_addr_change = hci_stack->custom_bd_addr_set 1716 && hci_stack->chipset 1717 && hci_stack->chipset->set_bd_addr_command; 1718 #endif 1719 1720 switch(hci_stack->substate){ 1721 1722 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1723 case HCI_INIT_SEND_RESET: 1724 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1725 // fix: just correct substate and behave as command below 1726 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1727 btstack_run_loop_remove_timer(&hci_stack->timeout); 1728 break; 1729 case HCI_INIT_W4_SEND_RESET: 1730 btstack_run_loop_remove_timer(&hci_stack->timeout); 1731 break; 1732 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1733 log_info("Received local name, need baud change %d", (int) need_baud_change); 1734 if (need_baud_change){ 1735 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1736 return; 1737 } 1738 // skip baud change 1739 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1740 return; 1741 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1742 // for STLC2500D, baud rate change already happened. 1743 // for others, baud rate gets changed now 1744 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1745 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1746 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1747 hci_stack->hci_transport->set_baudrate(baud_rate); 1748 } 1749 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1750 return; 1751 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1752 btstack_run_loop_remove_timer(&hci_stack->timeout); 1753 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1754 return; 1755 case HCI_INIT_W4_CUSTOM_INIT: 1756 // repeat custom init 1757 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1758 return; 1759 #else 1760 case HCI_INIT_W4_SEND_RESET: 1761 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1762 return ; 1763 #endif 1764 1765 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1766 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1767 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1768 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1769 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1770 return; 1771 } 1772 if (need_addr_change){ 1773 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1774 return; 1775 } 1776 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1777 return; 1778 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1779 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1780 if (need_baud_change){ 1781 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1782 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1783 hci_stack->hci_transport->set_baudrate(baud_rate); 1784 } 1785 if (need_addr_change){ 1786 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1787 return; 1788 } 1789 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1790 return; 1791 case HCI_INIT_W4_SET_BD_ADDR: 1792 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1793 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1794 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1795 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1796 return; 1797 } 1798 // skipping st warm boot 1799 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1800 return; 1801 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1802 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1803 return; 1804 #endif 1805 case HCI_INIT_W4_READ_BD_ADDR: 1806 // only read buffer size if supported 1807 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1808 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1809 return; 1810 } 1811 // skipping read buffer size 1812 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1813 return; 1814 case HCI_INIT_W4_SET_EVENT_MASK: 1815 // skip Classic init commands for LE only chipsets 1816 if (!hci_classic_supported()){ 1817 #ifdef ENABLE_BLE 1818 if (hci_le_supported()){ 1819 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1820 return; 1821 } 1822 #endif 1823 log_error("Neither BR/EDR nor LE supported"); 1824 hci_init_done(); 1825 return; 1826 } 1827 if (!gap_ssp_supported()){ 1828 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1829 return; 1830 } 1831 break; 1832 #ifdef ENABLE_BLE 1833 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1834 // skip write le host if not supported (e.g. on LE only EM9301) 1835 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1836 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1837 return; 1838 1839 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1840 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1841 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1842 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1843 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1844 return; 1845 } 1846 // explicit fall through to reduce repetitions 1847 1848 #ifdef ENABLE_LE_CENTRAL 1849 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1850 #else 1851 hci_init_done(); 1852 #endif 1853 return; 1854 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1855 1856 #endif /* ENABLE_BLE */ 1857 1858 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1859 // skip write secure connections host support if not supported or disabled 1860 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1861 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1862 return; 1863 } 1864 break; 1865 1866 #ifdef ENABLE_SCO_OVER_HCI 1867 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1868 // skip write synchronous flow control if not supported 1869 if (hci_stack->local_supported_commands[0] & 0x04) break; 1870 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1871 1872 /* fall through */ 1873 1874 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1875 // skip write default erroneous data reporting if not supported 1876 if (hci_stack->local_supported_commands[0] & 0x08) break; 1877 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1878 1879 /* fall through */ 1880 1881 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1882 // skip bcm set sco pcm config on non-Broadcom chipsets 1883 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1884 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1885 1886 /* fall through */ 1887 1888 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1889 if (!hci_le_supported()){ 1890 // SKIP LE init for Classic only configuration 1891 hci_init_done(); 1892 return; 1893 } 1894 break; 1895 1896 #else /* !ENABLE_SCO_OVER_HCI */ 1897 1898 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1899 #ifdef ENABLE_SCO_OVER_PCM 1900 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1901 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1902 return; 1903 } 1904 #endif 1905 /* fall through */ 1906 1907 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1908 #ifdef ENABLE_BLE 1909 if (hci_le_supported()){ 1910 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1911 return; 1912 } 1913 #endif 1914 // SKIP LE init for Classic only configuration 1915 hci_init_done(); 1916 return; 1917 #endif /* ENABLE_SCO_OVER_HCI */ 1918 1919 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1920 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1921 // Response to command before init done state -> init done 1922 case (HCI_INIT_DONE-1): 1923 hci_init_done(); 1924 return; 1925 #endif 1926 1927 default: 1928 break; 1929 } 1930 hci_initializing_next_state(); 1931 } 1932 1933 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1934 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1935 bd_addr_t bd_address; 1936 (void)memcpy(&bd_address, conn->address, 6); 1937 1938 #ifdef ENABLE_CLASSIC 1939 // cache needed data 1940 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1941 #endif 1942 1943 // connection failed, remove entry 1944 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1945 btstack_memory_hci_connection_free( conn ); 1946 1947 #ifdef ENABLE_CLASSIC 1948 // notify client if dedicated bonding 1949 if (notify_dedicated_bonding_failed){ 1950 log_info("hci notify_dedicated_bonding_failed"); 1951 hci_emit_dedicated_bonding_result(bd_address, status); 1952 } 1953 1954 // if authentication error, also delete link key 1955 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1956 gap_drop_link_key_for_bd_addr(bd_address); 1957 } 1958 #else 1959 UNUSED(status); 1960 #endif 1961 } 1962 1963 #ifdef ENABLE_CLASSIC 1964 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1965 // SSP Controller 1966 if (features[6] & (1 << 3)){ 1967 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1968 } 1969 // eSCO 1970 if (features[3] & (1<<7)){ 1971 conn->remote_supported_features[0] |= 1; 1972 } 1973 // Extended features 1974 if (features[7] & (1<<7)){ 1975 conn->remote_supported_features[0] |= 2; 1976 } 1977 } 1978 1979 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1980 // SSP Host 1981 if (features[0] & (1 << 0)){ 1982 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1983 } 1984 // SC Host 1985 if (features[0] & (1 << 3)){ 1986 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1987 } 1988 } 1989 1990 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1991 // SC Controller 1992 if (features[1] & (1 << 0)){ 1993 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1994 } 1995 } 1996 1997 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1998 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1999 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2000 if (conn->bonding_flags & BONDING_DEDICATED){ 2001 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2002 } 2003 } 2004 #endif 2005 2006 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2007 // handle BT initialization 2008 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2009 hci_initializing_event_handler(packet, size); 2010 } 2011 2012 // help with BT sleep 2013 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2014 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2015 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2016 hci_initializing_next_state(); 2017 } 2018 } 2019 2020 #ifdef ENABLE_CLASSIC 2021 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2022 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2023 conn->encryption_key_size = encryption_key_size; 2024 2025 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 2026 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2027 return; 2028 } 2029 2030 // Request Authentication if not already done 2031 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2032 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2033 } 2034 #endif 2035 2036 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2037 UNUSED(size); 2038 2039 uint16_t manufacturer; 2040 #ifdef ENABLE_CLASSIC 2041 hci_con_handle_t handle; 2042 hci_connection_t * conn; 2043 uint8_t status; 2044 #endif 2045 // get num cmd packets - limit to 1 to reduce complexity 2046 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2047 2048 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2049 switch (opcode){ 2050 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2051 if (packet[5]) break; 2052 // terminate, name 248 chars 2053 packet[6+248] = 0; 2054 log_info("local name: %s", &packet[6]); 2055 break; 2056 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2057 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2058 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2059 uint16_t acl_len = little_endian_read_16(packet, 6); 2060 uint16_t sco_len = packet[8]; 2061 2062 // determine usable ACL/SCO payload size 2063 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2064 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2065 2066 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2067 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2068 2069 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2070 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2071 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2072 } 2073 break; 2074 case HCI_OPCODE_HCI_READ_RSSI: 2075 if (packet[5] == ERROR_CODE_SUCCESS){ 2076 uint8_t event[5]; 2077 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2078 event[1] = 3; 2079 (void)memcpy(&event[2], &packet[6], 3); 2080 hci_emit_event(event, sizeof(event), 1); 2081 } 2082 break; 2083 #ifdef ENABLE_BLE 2084 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2085 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2086 hci_stack->le_acl_packets_total_num = packet[8]; 2087 // determine usable ACL payload size 2088 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2089 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2090 } 2091 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2092 break; 2093 #endif 2094 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2095 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2096 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2097 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2098 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); 2099 break; 2100 #endif 2101 #ifdef ENABLE_LE_CENTRAL 2102 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2103 hci_stack->le_whitelist_capacity = packet[6]; 2104 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2105 break; 2106 #endif 2107 case HCI_OPCODE_HCI_READ_BD_ADDR: 2108 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2109 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)); 2110 #ifdef ENABLE_CLASSIC 2111 if (hci_stack->link_key_db){ 2112 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2113 } 2114 #endif 2115 break; 2116 #ifdef ENABLE_CLASSIC 2117 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2118 hci_emit_discoverable_enabled(hci_stack->discoverable); 2119 break; 2120 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2121 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2122 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2123 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2124 hci_emit_event(event, sizeof(event), 1); 2125 } 2126 break; 2127 #endif 2128 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2129 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2130 2131 #ifdef ENABLE_CLASSIC 2132 // determine usable ACL packet types based on host buffer size and supported features 2133 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2134 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2135 #endif 2136 // Classic/LE 2137 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2138 break; 2139 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2140 manufacturer = little_endian_read_16(packet, 10); 2141 // map Cypress to Broadcom 2142 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2143 log_info("Treat Cypress as Broadcom"); 2144 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2145 little_endian_store_16(packet, 10, manufacturer); 2146 } 2147 hci_stack->manufacturer = manufacturer; 2148 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2149 break; 2150 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2151 hci_stack->local_supported_commands[0] = 2152 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2153 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2154 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2155 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2156 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2157 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2158 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2159 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2160 hci_stack->local_supported_commands[1] = 2161 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2162 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2163 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2164 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2165 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2166 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2167 break; 2168 #ifdef ENABLE_CLASSIC 2169 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2170 if (packet[5]) return; 2171 hci_stack->synchronous_flow_control_enabled = 1; 2172 break; 2173 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2174 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2175 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2176 conn = hci_connection_for_handle(handle); 2177 if (conn != NULL) { 2178 uint8_t key_size = 0; 2179 if (status == 0){ 2180 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2181 log_info("Handle %04x key Size: %u", handle, key_size); 2182 } else { 2183 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2184 } 2185 hci_handle_read_encryption_key_size_complete(conn, key_size); 2186 } 2187 break; 2188 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2189 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2190 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2191 uint8_t event[67]; 2192 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2193 event[1] = 65; 2194 (void)memset(&event[2], 0, 65); 2195 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2196 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2197 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2198 event[2] = 3; 2199 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2200 } else { 2201 event[2] = 1; 2202 } 2203 } 2204 hci_emit_event(event, sizeof(event), 0); 2205 break; 2206 } 2207 #endif 2208 #endif 2209 default: 2210 break; 2211 } 2212 } 2213 2214 #ifdef ENABLE_BLE 2215 static void event_handle_le_connection_complete(const uint8_t * packet){ 2216 bd_addr_t addr; 2217 bd_addr_type_t addr_type; 2218 hci_connection_t * conn; 2219 2220 // Connection management 2221 reverse_bd_addr(&packet[8], addr); 2222 addr_type = (bd_addr_type_t)packet[7]; 2223 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2224 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2225 2226 #ifdef ENABLE_LE_CENTRAL 2227 // handle error: error is reported only to the initiator -> outgoing connection 2228 if (packet[3]){ 2229 2230 // handle cancelled outgoing connection 2231 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2232 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2233 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2234 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2235 // whitelist connect 2236 if (hci_is_le_connection_type(addr_type)){ 2237 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2238 } 2239 // get outgoing connection conn struct for direct connect 2240 conn = gap_get_outgoing_connection(); 2241 } 2242 2243 // outgoing le connection establishment is done 2244 if (conn){ 2245 // remove entry 2246 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2247 btstack_memory_hci_connection_free( conn ); 2248 } 2249 return; 2250 } 2251 #endif 2252 2253 // on success, both hosts receive connection complete event 2254 if (packet[6] == HCI_ROLE_MASTER){ 2255 #ifdef ENABLE_LE_CENTRAL 2256 // if we're master on an le connection, it was an outgoing connection and we're done with it 2257 // note: no hci_connection_t object exists yet for connect with whitelist 2258 if (hci_is_le_connection_type(addr_type)){ 2259 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2260 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2261 } 2262 #endif 2263 } else { 2264 #ifdef ENABLE_LE_PERIPHERAL 2265 // if we're slave, it was an incoming connection, advertisements have stopped 2266 hci_stack->le_advertisements_active = false; 2267 #endif 2268 } 2269 2270 // LE connections are auto-accepted, so just create a connection if there isn't one already 2271 if (!conn){ 2272 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2273 } 2274 2275 // no memory, sorry. 2276 if (!conn){ 2277 return; 2278 } 2279 2280 conn->state = OPEN; 2281 conn->role = packet[6]; 2282 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2283 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2284 2285 #ifdef ENABLE_LE_PERIPHERAL 2286 if (packet[6] == HCI_ROLE_SLAVE){ 2287 hci_update_advertisements_enabled_for_current_roles(); 2288 } 2289 #endif 2290 2291 // init unenhanced att bearer mtu 2292 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2293 conn->att_connection.mtu_exchanged = false; 2294 2295 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2296 2297 // restart timer 2298 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2299 // btstack_run_loop_add_timer(&conn->timeout); 2300 2301 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2302 2303 hci_emit_nr_connections_changed(); 2304 } 2305 #endif 2306 2307 static void event_handler(uint8_t *packet, uint16_t size){ 2308 2309 uint16_t event_length = packet[1]; 2310 2311 // assert packet is complete 2312 if (size != (event_length + 2u)){ 2313 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2314 return; 2315 } 2316 2317 bd_addr_type_t addr_type; 2318 hci_con_handle_t handle; 2319 hci_connection_t * conn; 2320 int i; 2321 int create_connection_cmd; 2322 2323 #ifdef ENABLE_CLASSIC 2324 hci_link_type_t link_type; 2325 bd_addr_t addr; 2326 #endif 2327 2328 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2329 2330 switch (hci_event_packet_get_type(packet)) { 2331 2332 case HCI_EVENT_COMMAND_COMPLETE: 2333 handle_command_complete_event(packet, size); 2334 break; 2335 2336 case HCI_EVENT_COMMAND_STATUS: 2337 // get num cmd packets - limit to 1 to reduce complexity 2338 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2339 2340 // check command status to detected failed outgoing connections 2341 create_connection_cmd = 0; 2342 #ifdef ENABLE_CLASSIC 2343 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2344 create_connection_cmd = 1; 2345 } 2346 #endif 2347 #ifdef ENABLE_LE_CENTRAL 2348 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2349 create_connection_cmd = 1; 2350 } 2351 #endif 2352 if (create_connection_cmd) { 2353 uint8_t status = hci_event_command_status_get_status(packet); 2354 addr_type = hci_stack->outgoing_addr_type; 2355 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2356 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); 2357 2358 // reset outgoing address info 2359 memset(hci_stack->outgoing_addr, 0, 6); 2360 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2361 2362 // on error 2363 if (status != ERROR_CODE_SUCCESS){ 2364 #ifdef ENABLE_LE_CENTRAL 2365 if (hci_is_le_connection_type(addr_type)){ 2366 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2367 } 2368 #endif 2369 // error => outgoing connection failed 2370 if (conn != NULL){ 2371 hci_handle_connection_failed(conn, status); 2372 } 2373 } 2374 } 2375 break; 2376 2377 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2378 if (size < 3) return; 2379 uint16_t num_handles = packet[2]; 2380 if (size != (3u + num_handles * 4u)) return; 2381 uint16_t offset = 3; 2382 for (i=0; i<num_handles;i++){ 2383 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2384 offset += 2u; 2385 uint16_t num_packets = little_endian_read_16(packet, offset); 2386 offset += 2u; 2387 2388 conn = hci_connection_for_handle(handle); 2389 if (!conn){ 2390 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2391 continue; 2392 } 2393 2394 if (conn->num_packets_sent >= num_packets){ 2395 conn->num_packets_sent -= num_packets; 2396 } else { 2397 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2398 conn->num_packets_sent = 0; 2399 } 2400 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2401 2402 #ifdef ENABLE_CLASSIC 2403 // For SCO, we do the can_send_now_check here 2404 hci_notify_if_sco_can_send_now(); 2405 #endif 2406 } 2407 break; 2408 } 2409 2410 #ifdef ENABLE_CLASSIC 2411 case HCI_EVENT_INQUIRY_COMPLETE: 2412 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2413 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2414 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2415 hci_emit_event(event, sizeof(event), 1); 2416 } 2417 break; 2418 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2419 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2420 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2421 } 2422 break; 2423 case HCI_EVENT_CONNECTION_REQUEST: 2424 reverse_bd_addr(&packet[2], addr); 2425 link_type = (hci_link_type_t) packet[11]; 2426 if (hci_stack->gap_classic_accept_callback != NULL){ 2427 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2428 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2429 bd_addr_copy(hci_stack->decline_addr, addr); 2430 break; 2431 } 2432 } 2433 2434 // TODO: eval COD 8-10 2435 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2436 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2437 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2438 if (!conn) { 2439 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2440 } 2441 if (!conn) { 2442 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2443 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2444 bd_addr_copy(hci_stack->decline_addr, addr); 2445 break; 2446 } 2447 conn->role = HCI_ROLE_SLAVE; 2448 conn->state = RECEIVED_CONNECTION_REQUEST; 2449 // store info about eSCO 2450 if (link_type == HCI_LINK_TYPE_ESCO){ 2451 conn->remote_supported_features[0] |= 1; 2452 } 2453 hci_run(); 2454 break; 2455 2456 case HCI_EVENT_CONNECTION_COMPLETE: 2457 // Connection management 2458 reverse_bd_addr(&packet[5], addr); 2459 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2460 addr_type = BD_ADDR_TYPE_ACL; 2461 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2462 if (conn) { 2463 if (!packet[2]){ 2464 conn->state = OPEN; 2465 conn->con_handle = little_endian_read_16(packet, 3); 2466 2467 // queue get remote feature 2468 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2469 2470 // queue set supervision timeout if we're master 2471 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2472 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2473 } 2474 2475 // restart timer 2476 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2477 btstack_run_loop_add_timer(&conn->timeout); 2478 2479 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2480 2481 hci_emit_nr_connections_changed(); 2482 } else { 2483 // connection failed 2484 hci_handle_connection_failed(conn, packet[2]); 2485 } 2486 } 2487 break; 2488 2489 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2490 reverse_bd_addr(&packet[5], addr); 2491 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2492 if (packet[2]){ 2493 // connection failed 2494 break; 2495 } 2496 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2497 if (!conn) { 2498 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2499 } 2500 if (!conn) { 2501 break; 2502 } 2503 conn->state = OPEN; 2504 conn->con_handle = little_endian_read_16(packet, 3); 2505 2506 #ifdef ENABLE_SCO_OVER_HCI 2507 // update SCO 2508 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2509 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2510 } 2511 // trigger can send now 2512 if (hci_have_usb_transport()){ 2513 hci_stack->sco_can_send_now = 1; 2514 } 2515 #endif 2516 #ifdef HAVE_SCO_TRANSPORT 2517 // configure sco transport 2518 if (hci_stack->sco_transport != NULL){ 2519 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2520 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2521 } 2522 #endif 2523 break; 2524 2525 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2526 handle = little_endian_read_16(packet, 3); 2527 conn = hci_connection_for_handle(handle); 2528 if (!conn) break; 2529 if (!packet[2]){ 2530 const uint8_t * features = &packet[5]; 2531 hci_handle_remote_features_page_0(conn, features); 2532 2533 // read extended features if possible 2534 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2535 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2536 break; 2537 } 2538 } 2539 hci_handle_remote_features_received(conn); 2540 break; 2541 2542 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2543 handle = little_endian_read_16(packet, 3); 2544 conn = hci_connection_for_handle(handle); 2545 if (!conn) break; 2546 // status = ok, page = 1 2547 if (!packet[2]) { 2548 uint8_t page_number = packet[5]; 2549 uint8_t maximum_page_number = packet[6]; 2550 const uint8_t * features = &packet[7]; 2551 bool done = false; 2552 switch (page_number){ 2553 case 1: 2554 hci_handle_remote_features_page_1(conn, features); 2555 if (maximum_page_number >= 2){ 2556 // get Secure Connections (Controller) from Page 2 if available 2557 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2558 } else { 2559 // otherwise, assume SC (Controller) == SC (Host) 2560 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2561 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2562 } 2563 done = true; 2564 } 2565 break; 2566 case 2: 2567 hci_handle_remote_features_page_2(conn, features); 2568 done = true; 2569 break; 2570 default: 2571 break; 2572 } 2573 if (!done) break; 2574 } 2575 hci_handle_remote_features_received(conn); 2576 break; 2577 2578 case HCI_EVENT_LINK_KEY_REQUEST: 2579 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2580 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2581 // request handled by hci_run() 2582 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2583 break; 2584 2585 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2586 reverse_bd_addr(&packet[2], addr); 2587 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2588 if (!conn) break; 2589 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2590 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2591 // Change Connection Encryption keeps link key type 2592 if (link_key_type != CHANGED_COMBINATION_KEY){ 2593 conn->link_key_type = link_key_type; 2594 } 2595 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2596 // still forward event to allow dismiss of pairing dialog 2597 break; 2598 } 2599 2600 case HCI_EVENT_PIN_CODE_REQUEST: 2601 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2602 // non-bondable mode: pin code negative reply will be sent 2603 if (!hci_stack->bondable){ 2604 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2605 hci_run(); 2606 return; 2607 } 2608 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2609 if (!hci_stack->link_key_db) break; 2610 hci_event_pin_code_request_get_bd_addr(packet, addr); 2611 hci_stack->link_key_db->delete_link_key(addr); 2612 break; 2613 2614 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2615 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2616 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2617 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2618 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2619 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2620 } else { 2621 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2622 } 2623 #endif 2624 break; 2625 2626 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2627 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2628 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2629 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2630 break; 2631 #endif 2632 2633 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2634 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2635 if (!hci_stack->ssp_auto_accept) break; 2636 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2637 break; 2638 2639 case HCI_EVENT_USER_PASSKEY_REQUEST: 2640 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2641 if (!hci_stack->ssp_auto_accept) break; 2642 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2643 break; 2644 2645 case HCI_EVENT_MODE_CHANGE: 2646 handle = hci_event_mode_change_get_handle(packet); 2647 conn = hci_connection_for_handle(handle); 2648 if (!conn) break; 2649 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2650 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2651 break; 2652 #endif 2653 2654 case HCI_EVENT_ENCRYPTION_CHANGE: 2655 handle = hci_event_encryption_change_get_connection_handle(packet); 2656 conn = hci_connection_for_handle(handle); 2657 if (!conn) break; 2658 if (hci_event_encryption_change_get_status(packet) == 0u) { 2659 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2660 if (encryption_enabled){ 2661 if (hci_is_le_connection(conn)){ 2662 // For LE, we accept connection as encrypted 2663 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2664 } 2665 #ifdef ENABLE_CLASSIC 2666 else { 2667 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2668 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2669 bool connected_uses_aes_ccm = encryption_enabled == 2; 2670 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2671 log_info("SC during pairing, but only E0 now -> abort"); 2672 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2673 break; 2674 } 2675 2676 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2677 if (connected_uses_aes_ccm){ 2678 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2679 } 2680 2681 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2682 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2683 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2684 } else { 2685 // if not, pretend everything is perfect 2686 hci_handle_read_encryption_key_size_complete(conn, 16); 2687 } 2688 } 2689 #endif 2690 } else { 2691 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2692 } 2693 } 2694 2695 break; 2696 2697 #ifdef ENABLE_CLASSIC 2698 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2699 handle = hci_event_authentication_complete_get_connection_handle(packet); 2700 conn = hci_connection_for_handle(handle); 2701 if (!conn) break; 2702 2703 // ignore authentication event if we didn't request it 2704 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2705 2706 // dedicated bonding: send result and disconnect 2707 if (conn->bonding_flags & BONDING_DEDICATED){ 2708 conn->bonding_flags &= ~BONDING_DEDICATED; 2709 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2710 conn->bonding_status = packet[2]; 2711 break; 2712 } 2713 2714 // authenticated only if auth status == 0 2715 if (hci_event_authentication_complete_get_status(packet) == 0){ 2716 // authenticated 2717 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2718 2719 // If link key sufficient for requested security and not already encrypted, start encryption 2720 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2721 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2722 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2723 break; 2724 } 2725 } 2726 2727 // emit updated security level 2728 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2729 break; 2730 #endif 2731 2732 // HCI_EVENT_DISCONNECTION_COMPLETE 2733 // has been split, to first notify stack before shutting connection down 2734 // see end of function, too. 2735 case HCI_EVENT_DISCONNECTION_COMPLETE: 2736 if (packet[2]) break; // status != 0 2737 handle = little_endian_read_16(packet, 3); 2738 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2739 if (hci_stack->acl_fragmentation_total_size > 0u) { 2740 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2741 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2742 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2743 hci_stack->acl_fragmentation_total_size = 0; 2744 hci_stack->acl_fragmentation_pos = 0; 2745 if (release_buffer){ 2746 hci_release_packet_buffer(); 2747 } 2748 } 2749 } 2750 2751 conn = hci_connection_for_handle(handle); 2752 if (!conn) break; 2753 // mark connection for shutdown 2754 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2755 2756 // emit dedicatd bonding event 2757 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2758 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2759 } 2760 2761 #ifdef ENABLE_BLE 2762 #ifdef ENABLE_LE_PERIPHERAL 2763 // re-enable advertisements for le connections if active 2764 if (hci_is_le_connection(conn)){ 2765 hci_update_advertisements_enabled_for_current_roles(); 2766 } 2767 #endif 2768 #endif 2769 break; 2770 2771 case HCI_EVENT_HARDWARE_ERROR: 2772 log_error("Hardware Error: 0x%02x", packet[2]); 2773 if (hci_stack->hardware_error_callback){ 2774 (*hci_stack->hardware_error_callback)(packet[2]); 2775 } else { 2776 // if no special requests, just reboot stack 2777 hci_power_control_off(); 2778 hci_power_control_on(); 2779 } 2780 break; 2781 2782 #ifdef ENABLE_CLASSIC 2783 case HCI_EVENT_ROLE_CHANGE: 2784 if (packet[2]) break; // status != 0 2785 reverse_bd_addr(&packet[3], addr); 2786 addr_type = BD_ADDR_TYPE_ACL; 2787 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2788 if (!conn) break; 2789 conn->role = packet[9]; 2790 break; 2791 #endif 2792 2793 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2794 // release packet buffer only for asynchronous transport and if there are not further fragements 2795 if (hci_transport_synchronous()) { 2796 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2797 return; // instead of break: to avoid re-entering hci_run() 2798 } 2799 hci_stack->acl_fragmentation_tx_active = 0; 2800 if (hci_stack->acl_fragmentation_total_size) break; 2801 hci_release_packet_buffer(); 2802 2803 // L2CAP receives this event via the hci_emit_event below 2804 2805 #ifdef ENABLE_CLASSIC 2806 // For SCO, we do the can_send_now_check here 2807 hci_notify_if_sco_can_send_now(); 2808 #endif 2809 break; 2810 2811 #ifdef ENABLE_CLASSIC 2812 case HCI_EVENT_SCO_CAN_SEND_NOW: 2813 // For SCO, we do the can_send_now_check here 2814 hci_stack->sco_can_send_now = 1; 2815 hci_notify_if_sco_can_send_now(); 2816 return; 2817 2818 // explode inquriy results for easier consumption 2819 case HCI_EVENT_INQUIRY_RESULT: 2820 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2821 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2822 gap_inquiry_explode(packet, size); 2823 break; 2824 #endif 2825 2826 #ifdef ENABLE_BLE 2827 case HCI_EVENT_LE_META: 2828 switch (packet[2]){ 2829 #ifdef ENABLE_LE_CENTRAL 2830 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2831 // log_info("advertising report received"); 2832 if (!hci_stack->le_scanning_enabled) break; 2833 le_handle_advertisement_report(packet, size); 2834 break; 2835 #endif 2836 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2837 event_handle_le_connection_complete(packet); 2838 break; 2839 2840 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2841 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2842 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2843 conn = hci_connection_for_handle(handle); 2844 if (!conn) break; 2845 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2846 break; 2847 2848 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2849 // connection 2850 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2851 conn = hci_connection_for_handle(handle); 2852 if (conn) { 2853 // read arguments 2854 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2855 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2856 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2857 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2858 2859 // validate against current connection parameter range 2860 le_connection_parameter_range_t existing_range; 2861 gap_get_connection_parameter_range(&existing_range); 2862 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2863 if (update_parameter){ 2864 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2865 conn->le_conn_interval_min = le_conn_interval_min; 2866 conn->le_conn_interval_max = le_conn_interval_max; 2867 conn->le_conn_latency = le_conn_latency; 2868 conn->le_supervision_timeout = le_supervision_timeout; 2869 } else { 2870 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2871 } 2872 } 2873 break; 2874 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2875 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2876 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2877 conn = hci_connection_for_handle(handle); 2878 if (conn) { 2879 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2880 } 2881 break; 2882 #endif 2883 default: 2884 break; 2885 } 2886 break; 2887 #endif 2888 case HCI_EVENT_VENDOR_SPECIFIC: 2889 // Vendor specific commands often create vendor specific event instead of num completed packets 2890 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2891 switch (hci_stack->manufacturer){ 2892 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2893 hci_stack->num_cmd_packets = 1; 2894 break; 2895 default: 2896 break; 2897 } 2898 break; 2899 default: 2900 break; 2901 } 2902 2903 handle_event_for_current_stack_state(packet, size); 2904 2905 // notify upper stack 2906 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2907 2908 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2909 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2910 handle = little_endian_read_16(packet, 3); 2911 hci_connection_t * aConn = hci_connection_for_handle(handle); 2912 // discard connection if app did not trigger a reconnect in the event handler 2913 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2914 hci_shutdown_connection(aConn); 2915 } 2916 } 2917 2918 // execute main loop 2919 hci_run(); 2920 } 2921 2922 #ifdef ENABLE_CLASSIC 2923 2924 #ifdef ENABLE_SCO_OVER_HCI 2925 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2926 static void sco_schedule_tx(hci_connection_t * conn); 2927 2928 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2929 log_debug("SCO TX Timeout"); 2930 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2931 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2932 if (!conn) return; 2933 2934 // trigger send 2935 conn->sco_tx_ready = 1; 2936 // extra packet if CVSD but SCO buffer is too short 2937 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2938 conn->sco_tx_ready++; 2939 } 2940 hci_notify_if_sco_can_send_now(); 2941 } 2942 2943 2944 #define SCO_TX_AFTER_RX_MS (6) 2945 2946 static void sco_schedule_tx(hci_connection_t * conn){ 2947 2948 uint32_t now = btstack_run_loop_get_time_ms(); 2949 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2950 int time_delta_ms = sco_tx_ms - now; 2951 2952 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2953 2954 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2955 btstack_run_loop_set_timer(timer, time_delta_ms); 2956 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2957 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2958 btstack_run_loop_add_timer(timer); 2959 } 2960 #endif 2961 2962 static void sco_handler(uint8_t * packet, uint16_t size){ 2963 // lookup connection struct 2964 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2965 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2966 if (!conn) return; 2967 2968 #ifdef ENABLE_SCO_OVER_HCI 2969 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2970 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2971 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2972 packet[2] = 0x3c; 2973 memmove(&packet[3], &packet[23], 63); 2974 size = 63; 2975 } 2976 } 2977 2978 if (hci_have_usb_transport()){ 2979 // Nothing to do 2980 } else { 2981 // 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); 2982 if (hci_stack->synchronous_flow_control_enabled == 0){ 2983 uint32_t now = btstack_run_loop_get_time_ms(); 2984 2985 if (!conn->sco_rx_valid){ 2986 // ignore first 10 packets 2987 conn->sco_rx_count++; 2988 // log_debug("sco rx count %u", conn->sco_rx_count); 2989 if (conn->sco_rx_count == 10) { 2990 // use first timestamp as is and pretent it just started 2991 conn->sco_rx_ms = now; 2992 conn->sco_rx_valid = 1; 2993 conn->sco_rx_count = 0; 2994 sco_schedule_tx(conn); 2995 } 2996 } else { 2997 // track expected arrival timme 2998 conn->sco_rx_count++; 2999 conn->sco_rx_ms += 7; 3000 int delta = (int32_t) (now - conn->sco_rx_ms); 3001 if (delta > 0){ 3002 conn->sco_rx_ms++; 3003 } 3004 // log_debug("sco rx %u", conn->sco_rx_ms); 3005 sco_schedule_tx(conn); 3006 } 3007 } 3008 } 3009 #endif 3010 3011 // deliver to app 3012 if (hci_stack->sco_packet_handler) { 3013 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3014 } 3015 3016 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3017 conn->num_packets_completed++; 3018 hci_stack->host_completed_packets = 1; 3019 hci_run(); 3020 #endif 3021 } 3022 #endif 3023 3024 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3025 hci_dump_packet(packet_type, 1, packet, size); 3026 switch (packet_type) { 3027 case HCI_EVENT_PACKET: 3028 event_handler(packet, size); 3029 break; 3030 case HCI_ACL_DATA_PACKET: 3031 acl_handler(packet, size); 3032 break; 3033 #ifdef ENABLE_CLASSIC 3034 case HCI_SCO_DATA_PACKET: 3035 sco_handler(packet, size); 3036 break; 3037 #endif 3038 default: 3039 break; 3040 } 3041 } 3042 3043 /** 3044 * @brief Add event packet handler. 3045 */ 3046 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3047 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3048 } 3049 3050 3051 /** Register HCI packet handlers */ 3052 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3053 hci_stack->acl_packet_handler = handler; 3054 } 3055 3056 #ifdef ENABLE_CLASSIC 3057 /** 3058 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3059 */ 3060 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3061 hci_stack->sco_packet_handler = handler; 3062 } 3063 #endif 3064 3065 static void hci_state_reset(void){ 3066 // no connections yet 3067 hci_stack->connections = NULL; 3068 3069 // keep discoverable/connectable as this has been requested by the client(s) 3070 // hci_stack->discoverable = 0; 3071 // hci_stack->connectable = 0; 3072 // hci_stack->bondable = 1; 3073 // hci_stack->own_addr_type = 0; 3074 3075 // buffer is free 3076 hci_stack->hci_packet_buffer_reserved = 0; 3077 3078 // no pending cmds 3079 hci_stack->decline_reason = 0; 3080 hci_stack->new_scan_enable_value = 0xff; 3081 3082 hci_stack->secure_connections_active = false; 3083 3084 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3085 hci_stack->classic_read_local_oob_data = true; 3086 #endif 3087 3088 // LE 3089 #ifdef ENABLE_BLE 3090 memset(hci_stack->le_random_address, 0, 6); 3091 hci_stack->le_random_address_set = 0; 3092 #endif 3093 #ifdef ENABLE_LE_CENTRAL 3094 hci_stack->le_scanning_active = 0; 3095 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3096 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3097 hci_stack->le_whitelist_capacity = 0; 3098 #endif 3099 } 3100 3101 #ifdef ENABLE_CLASSIC 3102 /** 3103 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3104 */ 3105 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3106 // store and open remote device db 3107 hci_stack->link_key_db = link_key_db; 3108 if (hci_stack->link_key_db) { 3109 hci_stack->link_key_db->open(); 3110 } 3111 } 3112 #endif 3113 3114 void hci_init(const hci_transport_t *transport, const void *config){ 3115 3116 #ifdef HAVE_MALLOC 3117 if (!hci_stack) { 3118 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3119 } 3120 #else 3121 hci_stack = &hci_stack_static; 3122 #endif 3123 memset(hci_stack, 0, sizeof(hci_stack_t)); 3124 3125 // reference to use transport layer implementation 3126 hci_stack->hci_transport = transport; 3127 3128 // reference to used config 3129 hci_stack->config = config; 3130 3131 // setup pointer for outgoing packet buffer 3132 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3133 3134 // max acl payload size defined in config.h 3135 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3136 3137 // register packet handlers with transport 3138 transport->register_packet_handler(&packet_handler); 3139 3140 hci_stack->state = HCI_STATE_OFF; 3141 3142 // class of device 3143 hci_stack->class_of_device = 0x007a020c; // Smartphone 3144 3145 // bondable by default 3146 hci_stack->bondable = 1; 3147 3148 #ifdef ENABLE_CLASSIC 3149 // classic name 3150 hci_stack->local_name = default_classic_name; 3151 3152 // Master slave policy 3153 hci_stack->master_slave_policy = 1; 3154 3155 // Allow Role Switch 3156 hci_stack->allow_role_switch = 1; 3157 3158 // Default / minimum security level = 2 3159 hci_stack->gap_security_level = LEVEL_2; 3160 3161 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3162 hci_stack->gap_required_encyrption_key_size = 7; 3163 #endif 3164 3165 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3166 hci_stack->ssp_enable = 1; 3167 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3168 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3169 hci_stack->ssp_auto_accept = 1; 3170 3171 // Secure Connections: enable (requires support from Controller) 3172 hci_stack->secure_connections_enable = true; 3173 3174 // voice setting - signed 16 bit pcm data with CVSD over the air 3175 hci_stack->sco_voice_setting = 0x60; 3176 3177 #ifdef ENABLE_LE_CENTRAL 3178 // connection parameter to use for outgoing connections 3179 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3180 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3181 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3182 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3183 hci_stack->le_connection_latency = 4; // 4 3184 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3185 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3186 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3187 3188 // default LE Scanning 3189 hci_stack->le_scan_type = 0x1; // active 3190 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3191 hci_stack->le_scan_window = 0x30; // 30 ms 3192 #endif 3193 3194 #ifdef ENABLE_LE_PERIPHERAL 3195 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3196 #endif 3197 3198 // connection parameter range used to answer connection parameter update requests in l2cap 3199 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3200 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3201 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3202 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3203 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3204 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3205 3206 hci_state_reset(); 3207 } 3208 3209 void hci_deinit(void){ 3210 #ifdef HAVE_MALLOC 3211 if (hci_stack) { 3212 free(hci_stack); 3213 } 3214 #endif 3215 hci_stack = NULL; 3216 3217 #ifdef ENABLE_CLASSIC 3218 disable_l2cap_timeouts = 0; 3219 #endif 3220 } 3221 3222 /** 3223 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3224 */ 3225 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3226 hci_stack->chipset = chipset_driver; 3227 3228 // reset chipset driver - init is also called on power_up 3229 if (hci_stack->chipset && hci_stack->chipset->init){ 3230 hci_stack->chipset->init(hci_stack->config); 3231 } 3232 } 3233 3234 /** 3235 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3236 */ 3237 void hci_set_control(const btstack_control_t *hardware_control){ 3238 // references to used control implementation 3239 hci_stack->control = hardware_control; 3240 // init with transport config 3241 hardware_control->init(hci_stack->config); 3242 } 3243 3244 void hci_close(void){ 3245 // close remote device db 3246 if (hci_stack->link_key_db) { 3247 hci_stack->link_key_db->close(); 3248 } 3249 3250 btstack_linked_list_iterator_t lit; 3251 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3252 while (btstack_linked_list_iterator_has_next(&lit)){ 3253 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3254 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3255 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3256 hci_shutdown_connection(connection); 3257 } 3258 3259 hci_power_control(HCI_POWER_OFF); 3260 3261 #ifdef HAVE_MALLOC 3262 free(hci_stack); 3263 #endif 3264 hci_stack = NULL; 3265 } 3266 3267 #ifdef HAVE_SCO_TRANSPORT 3268 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3269 hci_stack->sco_transport = sco_transport; 3270 sco_transport->register_packet_handler(&packet_handler); 3271 } 3272 #endif 3273 3274 #ifdef ENABLE_CLASSIC 3275 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3276 // validate ranage and set 3277 if (encryption_key_size < 7) return; 3278 if (encryption_key_size > 16) return; 3279 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3280 } 3281 3282 void gap_set_security_level(gap_security_level_t security_level){ 3283 hci_stack->gap_security_level = security_level; 3284 } 3285 3286 gap_security_level_t gap_get_security_level(void){ 3287 return hci_stack->gap_security_level; 3288 } 3289 #endif 3290 3291 #ifdef ENABLE_CLASSIC 3292 void gap_set_class_of_device(uint32_t class_of_device){ 3293 hci_stack->class_of_device = class_of_device; 3294 } 3295 3296 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3297 hci_stack->default_link_policy_settings = default_link_policy_settings; 3298 } 3299 3300 void gap_set_allow_role_switch(bool allow_role_switch){ 3301 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3302 } 3303 3304 uint8_t hci_get_allow_role_switch(void){ 3305 return hci_stack->allow_role_switch; 3306 } 3307 3308 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3309 hci_stack->link_supervision_timeout = link_supervision_timeout; 3310 } 3311 3312 void hci_disable_l2cap_timeout_check(void){ 3313 disable_l2cap_timeouts = 1; 3314 } 3315 #endif 3316 3317 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3318 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3319 void hci_set_bd_addr(bd_addr_t addr){ 3320 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3321 hci_stack->custom_bd_addr_set = 1; 3322 } 3323 #endif 3324 3325 // State-Module-Driver overview 3326 // state module low-level 3327 // HCI_STATE_OFF off close 3328 // HCI_STATE_INITIALIZING, on open 3329 // HCI_STATE_WORKING, on open 3330 // HCI_STATE_HALTING, on open 3331 // HCI_STATE_SLEEPING, off/sleep close 3332 // HCI_STATE_FALLING_ASLEEP on open 3333 3334 static int hci_power_control_on(void){ 3335 3336 // power on 3337 int err = 0; 3338 if (hci_stack->control && hci_stack->control->on){ 3339 err = (*hci_stack->control->on)(); 3340 } 3341 if (err){ 3342 log_error( "POWER_ON failed"); 3343 hci_emit_hci_open_failed(); 3344 return err; 3345 } 3346 3347 // int chipset driver 3348 if (hci_stack->chipset && hci_stack->chipset->init){ 3349 hci_stack->chipset->init(hci_stack->config); 3350 } 3351 3352 // init transport 3353 if (hci_stack->hci_transport->init){ 3354 hci_stack->hci_transport->init(hci_stack->config); 3355 } 3356 3357 // open transport 3358 err = hci_stack->hci_transport->open(); 3359 if (err){ 3360 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3361 if (hci_stack->control && hci_stack->control->off){ 3362 (*hci_stack->control->off)(); 3363 } 3364 hci_emit_hci_open_failed(); 3365 return err; 3366 } 3367 return 0; 3368 } 3369 3370 static void hci_power_control_off(void){ 3371 3372 log_info("hci_power_control_off"); 3373 3374 // close low-level device 3375 hci_stack->hci_transport->close(); 3376 3377 log_info("hci_power_control_off - hci_transport closed"); 3378 3379 // power off 3380 if (hci_stack->control && hci_stack->control->off){ 3381 (*hci_stack->control->off)(); 3382 } 3383 3384 log_info("hci_power_control_off - control closed"); 3385 3386 hci_stack->state = HCI_STATE_OFF; 3387 } 3388 3389 static void hci_power_control_sleep(void){ 3390 3391 log_info("hci_power_control_sleep"); 3392 3393 #if 0 3394 // don't close serial port during sleep 3395 3396 // close low-level device 3397 hci_stack->hci_transport->close(hci_stack->config); 3398 #endif 3399 3400 // sleep mode 3401 if (hci_stack->control && hci_stack->control->sleep){ 3402 (*hci_stack->control->sleep)(); 3403 } 3404 3405 hci_stack->state = HCI_STATE_SLEEPING; 3406 } 3407 3408 static int hci_power_control_wake(void){ 3409 3410 log_info("hci_power_control_wake"); 3411 3412 // wake on 3413 if (hci_stack->control && hci_stack->control->wake){ 3414 (*hci_stack->control->wake)(); 3415 } 3416 3417 #if 0 3418 // open low-level device 3419 int err = hci_stack->hci_transport->open(hci_stack->config); 3420 if (err){ 3421 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3422 if (hci_stack->control && hci_stack->control->off){ 3423 (*hci_stack->control->off)(); 3424 } 3425 hci_emit_hci_open_failed(); 3426 return err; 3427 } 3428 #endif 3429 3430 return 0; 3431 } 3432 3433 static void hci_power_transition_to_initializing(void){ 3434 // set up state machine 3435 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3436 hci_stack->hci_packet_buffer_reserved = 0; 3437 hci_stack->state = HCI_STATE_INITIALIZING; 3438 hci_stack->substate = HCI_INIT_SEND_RESET; 3439 } 3440 3441 // returns error 3442 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3443 int err; 3444 switch (power_mode){ 3445 case HCI_POWER_ON: 3446 err = hci_power_control_on(); 3447 if (err != 0) { 3448 log_error("hci_power_control_on() error %d", err); 3449 return err; 3450 } 3451 hci_power_transition_to_initializing(); 3452 break; 3453 case HCI_POWER_OFF: 3454 // do nothing 3455 break; 3456 case HCI_POWER_SLEEP: 3457 // do nothing (with SLEEP == OFF) 3458 break; 3459 default: 3460 btstack_assert(false); 3461 break; 3462 } 3463 return ERROR_CODE_SUCCESS; 3464 } 3465 3466 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3467 switch (power_mode){ 3468 case HCI_POWER_ON: 3469 // do nothing 3470 break; 3471 case HCI_POWER_OFF: 3472 // no connections yet, just turn it off 3473 hci_power_control_off(); 3474 break; 3475 case HCI_POWER_SLEEP: 3476 // no connections yet, just turn it off 3477 hci_power_control_sleep(); 3478 break; 3479 default: 3480 btstack_assert(false); 3481 break; 3482 } 3483 return ERROR_CODE_SUCCESS; 3484 } 3485 3486 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3487 switch (power_mode){ 3488 case HCI_POWER_ON: 3489 // do nothing 3490 break; 3491 case HCI_POWER_OFF: 3492 // see hci_run 3493 hci_stack->state = HCI_STATE_HALTING; 3494 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3495 break; 3496 case HCI_POWER_SLEEP: 3497 // see hci_run 3498 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3499 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3500 break; 3501 default: 3502 btstack_assert(false); 3503 break; 3504 } 3505 return ERROR_CODE_SUCCESS; 3506 } 3507 3508 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3509 switch (power_mode){ 3510 case HCI_POWER_ON: 3511 hci_power_transition_to_initializing(); 3512 break; 3513 case HCI_POWER_OFF: 3514 // do nothing 3515 break; 3516 case HCI_POWER_SLEEP: 3517 // see hci_run 3518 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3519 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3520 break; 3521 default: 3522 btstack_assert(false); 3523 break; 3524 } 3525 return ERROR_CODE_SUCCESS; 3526 } 3527 3528 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3529 switch (power_mode){ 3530 case HCI_POWER_ON: 3531 3532 #ifdef HAVE_PLATFORM_IPHONE_OS 3533 // nothing to do, if H4 supports power management 3534 if (btstack_control_iphone_power_management_enabled()){ 3535 hci_stack->state = HCI_STATE_INITIALIZING; 3536 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3537 break; 3538 } 3539 #endif 3540 hci_power_transition_to_initializing(); 3541 break; 3542 case HCI_POWER_OFF: 3543 // see hci_run 3544 hci_stack->state = HCI_STATE_HALTING; 3545 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3546 break; 3547 case HCI_POWER_SLEEP: 3548 // do nothing 3549 break; 3550 default: 3551 btstack_assert(false); 3552 break; 3553 } 3554 return ERROR_CODE_SUCCESS; 3555 } 3556 3557 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3558 int err; 3559 switch (power_mode){ 3560 case HCI_POWER_ON: 3561 #ifdef HAVE_PLATFORM_IPHONE_OS 3562 // nothing to do, if H4 supports power management 3563 if (btstack_control_iphone_power_management_enabled()){ 3564 hci_stack->state = HCI_STATE_INITIALIZING; 3565 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3566 hci_update_scan_enable(); 3567 break; 3568 } 3569 #endif 3570 err = hci_power_control_wake(); 3571 if (err) return err; 3572 hci_power_transition_to_initializing(); 3573 break; 3574 case HCI_POWER_OFF: 3575 hci_stack->state = HCI_STATE_HALTING; 3576 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3577 break; 3578 case HCI_POWER_SLEEP: 3579 // do nothing 3580 break; 3581 default: 3582 btstack_assert(false); 3583 break; 3584 } 3585 return ERROR_CODE_SUCCESS; 3586 } 3587 3588 int hci_power_control(HCI_POWER_MODE power_mode){ 3589 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3590 int err = 0; 3591 switch (hci_stack->state){ 3592 case HCI_STATE_OFF: 3593 err = hci_power_control_state_off(power_mode); 3594 break; 3595 case HCI_STATE_INITIALIZING: 3596 err = hci_power_control_state_initializing(power_mode); 3597 break; 3598 case HCI_STATE_WORKING: 3599 err = hci_power_control_state_working(power_mode); 3600 break; 3601 case HCI_STATE_HALTING: 3602 err = hci_power_control_state_halting(power_mode); 3603 break; 3604 case HCI_STATE_FALLING_ASLEEP: 3605 err = hci_power_control_state_falling_asleep(power_mode); 3606 break; 3607 case HCI_STATE_SLEEPING: 3608 err = hci_power_control_state_sleeping(power_mode); 3609 break; 3610 default: 3611 btstack_assert(false); 3612 break; 3613 } 3614 if (err != 0){ 3615 return err; 3616 } 3617 3618 // create internal event 3619 hci_emit_state(); 3620 3621 // trigger next/first action 3622 hci_run(); 3623 3624 return 0; 3625 } 3626 3627 3628 #ifdef ENABLE_CLASSIC 3629 3630 static void hci_update_scan_enable(void){ 3631 // 2 = page scan, 1 = inq scan 3632 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3633 hci_run(); 3634 } 3635 3636 void gap_discoverable_control(uint8_t enable){ 3637 if (enable) enable = 1; // normalize argument 3638 3639 if (hci_stack->discoverable == enable){ 3640 hci_emit_discoverable_enabled(hci_stack->discoverable); 3641 return; 3642 } 3643 3644 hci_stack->discoverable = enable; 3645 hci_update_scan_enable(); 3646 } 3647 3648 void gap_connectable_control(uint8_t enable){ 3649 if (enable) enable = 1; // normalize argument 3650 3651 // don't emit event 3652 if (hci_stack->connectable == enable) return; 3653 3654 hci_stack->connectable = enable; 3655 hci_update_scan_enable(); 3656 } 3657 #endif 3658 3659 void gap_local_bd_addr(bd_addr_t address_buffer){ 3660 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3661 } 3662 3663 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3664 static void hci_host_num_completed_packets(void){ 3665 3666 // create packet manually as arrays are not supported and num_commands should not get reduced 3667 hci_reserve_packet_buffer(); 3668 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3669 3670 uint16_t size = 0; 3671 uint16_t num_handles = 0; 3672 packet[size++] = 0x35; 3673 packet[size++] = 0x0c; 3674 size++; // skip param len 3675 size++; // skip num handles 3676 3677 // add { handle, packets } entries 3678 btstack_linked_item_t * it; 3679 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3680 hci_connection_t * connection = (hci_connection_t *) it; 3681 if (connection->num_packets_completed){ 3682 little_endian_store_16(packet, size, connection->con_handle); 3683 size += 2; 3684 little_endian_store_16(packet, size, connection->num_packets_completed); 3685 size += 2; 3686 // 3687 num_handles++; 3688 connection->num_packets_completed = 0; 3689 } 3690 } 3691 3692 packet[2] = size - 3; 3693 packet[3] = num_handles; 3694 3695 hci_stack->host_completed_packets = 0; 3696 3697 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3698 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3699 3700 // release packet buffer for synchronous transport implementations 3701 if (hci_transport_synchronous()){ 3702 hci_release_packet_buffer(); 3703 hci_emit_transport_packet_sent(); 3704 } 3705 } 3706 #endif 3707 3708 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3709 UNUSED(ds); 3710 hci_stack->substate = HCI_HALTING_CLOSE; 3711 // allow packet handlers to defer final shutdown 3712 hci_emit_state(); 3713 hci_run(); 3714 } 3715 3716 static bool hci_run_acl_fragments(void){ 3717 if (hci_stack->acl_fragmentation_total_size > 0u) { 3718 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3719 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3720 if (connection) { 3721 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3722 hci_send_acl_packet_fragments(connection); 3723 return true; 3724 } 3725 } else { 3726 // connection gone -> discard further fragments 3727 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3728 hci_stack->acl_fragmentation_total_size = 0; 3729 hci_stack->acl_fragmentation_pos = 0; 3730 } 3731 } 3732 return false; 3733 } 3734 3735 #ifdef ENABLE_CLASSIC 3736 static bool hci_run_general_gap_classic(void){ 3737 3738 // decline incoming connections 3739 if (hci_stack->decline_reason){ 3740 uint8_t reason = hci_stack->decline_reason; 3741 hci_stack->decline_reason = 0; 3742 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3743 return true; 3744 } 3745 // send scan enable 3746 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3747 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3748 hci_stack->new_scan_enable_value = 0xff; 3749 return true; 3750 } 3751 // start/stop inquiry 3752 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3753 uint8_t duration = hci_stack->inquiry_state; 3754 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3755 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3756 return true; 3757 } 3758 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3759 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3760 hci_send_cmd(&hci_inquiry_cancel); 3761 return true; 3762 } 3763 // remote name request 3764 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3765 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3766 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3767 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3768 return true; 3769 } 3770 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3771 // Local OOB data 3772 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 3773 hci_stack->classic_read_local_oob_data = false; 3774 if (hci_stack->local_supported_commands[1] & 0x10u){ 3775 hci_send_cmd(&hci_read_local_extended_oob_data); 3776 } else { 3777 hci_send_cmd(&hci_read_local_oob_data); 3778 } 3779 } 3780 #endif 3781 // pairing 3782 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3783 uint8_t state = hci_stack->gap_pairing_state; 3784 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3785 switch (state){ 3786 case GAP_PAIRING_STATE_SEND_PIN: 3787 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); 3788 break; 3789 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3790 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3791 break; 3792 case GAP_PAIRING_STATE_SEND_PASSKEY: 3793 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3794 break; 3795 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3796 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3797 break; 3798 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3799 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3800 break; 3801 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3802 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3803 break; 3804 default: 3805 break; 3806 } 3807 return true; 3808 } 3809 return false; 3810 } 3811 #endif 3812 3813 #ifdef ENABLE_BLE 3814 static bool hci_run_general_gap_le(void){ 3815 3816 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3817 3818 if (hci_stack->state != HCI_STATE_WORKING) return false; 3819 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3820 3821 3822 // Phase 1: collect what to stop 3823 3824 bool scanning_stop = false; 3825 bool connecting_stop = false; 3826 bool advertising_stop = false; 3827 3828 #ifndef ENABLE_LE_CENTRAL 3829 UNUSED(scanning_stop); 3830 UNUSED(connecting_stop); 3831 #endif 3832 #ifndef ENABLE_LE_PERIPHERAL 3833 UNUSED(advertising_stop); 3834 #endif 3835 3836 // check if whitelist needs modification 3837 bool whitelist_modification_pending = false; 3838 btstack_linked_list_iterator_t lit; 3839 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3840 while (btstack_linked_list_iterator_has_next(&lit)){ 3841 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3842 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3843 whitelist_modification_pending = true; 3844 break; 3845 } 3846 } 3847 // check if resolving list needs modification 3848 bool resolving_list_modification_pending = false; 3849 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3850 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 3851 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3852 resolving_list_modification_pending = true; 3853 } 3854 #endif 3855 3856 #ifdef ENABLE_LE_CENTRAL 3857 // scanning control 3858 if (hci_stack->le_scanning_active) { 3859 // stop if: 3860 // - parameter change required 3861 // - it's disabled 3862 // - whitelist change required but used for scanning 3863 // - resolving list modified 3864 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3865 if ((hci_stack->le_scanning_param_update) || 3866 !hci_stack->le_scanning_enabled || 3867 scanning_uses_whitelist || 3868 resolving_list_modification_pending){ 3869 3870 scanning_stop = true; 3871 } 3872 } 3873 #endif 3874 3875 #ifdef ENABLE_LE_CENTRAL 3876 // connecting control 3877 bool connecting_with_whitelist; 3878 switch (hci_stack->le_connecting_state){ 3879 case LE_CONNECTING_DIRECT: 3880 case LE_CONNECTING_WHITELIST: 3881 // stop connecting if: 3882 // - connecting uses white and whitelist modification pending 3883 // - if it got disabled 3884 // - resolving list modified 3885 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 3886 if ((connecting_with_whitelist && whitelist_modification_pending) || 3887 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3888 resolving_list_modification_pending) { 3889 3890 connecting_stop = true; 3891 } 3892 break; 3893 default: 3894 break; 3895 } 3896 #endif 3897 3898 #ifdef ENABLE_LE_PERIPHERAL 3899 // le advertisement control 3900 if (hci_stack->le_advertisements_active){ 3901 // stop if: 3902 // - parameter change required 3903 // - it's disabled 3904 // - whitelist change required but used for advertisement filter policy 3905 // - resolving list modified 3906 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3907 if ((hci_stack->le_advertisements_todo != 0) || 3908 !hci_stack->le_advertisements_enabled_for_current_roles || 3909 (advertising_uses_whitelist & whitelist_modification_pending) || 3910 resolving_list_modification_pending) { 3911 3912 advertising_stop = true; 3913 } 3914 } 3915 #endif 3916 3917 3918 // Phase 2: stop everything that should be off during modifications 3919 3920 #ifdef ENABLE_LE_CENTRAL 3921 if (scanning_stop){ 3922 hci_stack->le_scanning_active = false; 3923 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3924 return true; 3925 } 3926 #endif 3927 3928 #ifdef ENABLE_LE_CENTRAL 3929 if (connecting_stop){ 3930 hci_send_cmd(&hci_le_create_connection_cancel); 3931 return true; 3932 } 3933 #endif 3934 3935 #ifdef ENABLE_LE_PERIPHERAL 3936 if (advertising_stop){ 3937 hci_stack->le_advertisements_active = false; 3938 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3939 return true; 3940 } 3941 #endif 3942 3943 // Phase 3: modify 3944 3945 #ifdef ENABLE_LE_CENTRAL 3946 if (hci_stack->le_scanning_param_update){ 3947 hci_stack->le_scanning_param_update = false; 3948 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 3949 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 3950 return true; 3951 } 3952 #endif 3953 3954 #ifdef ENABLE_LE_PERIPHERAL 3955 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3956 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3957 hci_send_cmd(&hci_le_set_advertising_parameters, 3958 hci_stack->le_advertisements_interval_min, 3959 hci_stack->le_advertisements_interval_max, 3960 hci_stack->le_advertisements_type, 3961 hci_stack->le_own_addr_type, 3962 hci_stack->le_advertisements_direct_address_type, 3963 hci_stack->le_advertisements_direct_address, 3964 hci_stack->le_advertisements_channel_map, 3965 hci_stack->le_advertisements_filter_policy); 3966 return true; 3967 } 3968 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3969 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3970 uint8_t adv_data_clean[31]; 3971 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3972 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3973 hci_stack->le_advertisements_data_len); 3974 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3975 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3976 return true; 3977 } 3978 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3979 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3980 uint8_t scan_data_clean[31]; 3981 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3982 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3983 hci_stack->le_scan_response_data_len); 3984 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3985 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3986 return true; 3987 } 3988 #endif 3989 3990 3991 #ifdef ENABLE_LE_CENTRAL 3992 // if connect with whitelist was active and is not cancelled yet, wait until next time 3993 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 3994 #endif 3995 3996 // LE Whitelist Management 3997 if (whitelist_modification_pending){ 3998 // add/remove entries 3999 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4000 while (btstack_linked_list_iterator_has_next(&lit)){ 4001 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4002 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4003 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4004 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4005 return true; 4006 } 4007 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4008 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4009 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4010 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4011 return true; 4012 } 4013 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4014 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4015 btstack_memory_whitelist_entry_free(entry); 4016 } 4017 } 4018 } 4019 4020 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4021 // LE Resolving List Management 4022 if (resolving_list_supported) { 4023 uint16_t i; 4024 switch (hci_stack->le_resolving_list_state) { 4025 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4026 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4027 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4028 return true; 4029 case LE_RESOLVING_LIST_READ_SIZE: 4030 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4031 hci_send_cmd(&hci_le_read_resolving_list_size); 4032 return true; 4033 case LE_RESOLVING_LIST_SEND_CLEAR: 4034 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4035 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4036 sizeof(hci_stack->le_resolving_list_add_entries)); 4037 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4038 sizeof(hci_stack->le_resolving_list_remove_entries)); 4039 hci_send_cmd(&hci_le_clear_resolving_list); 4040 return true; 4041 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4042 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4043 uint8_t offset = i >> 3; 4044 uint8_t mask = 1 << (i & 7); 4045 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4046 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4047 bd_addr_t peer_identity_addreses; 4048 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4049 sm_key_t peer_irk; 4050 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4051 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4052 4053 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4054 // trigger whitelist entry 'update' (work around for controller bug) 4055 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4056 while (btstack_linked_list_iterator_has_next(&lit)) { 4057 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4058 if (entry->address_type != peer_identity_addr_type) continue; 4059 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4060 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4061 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4062 } 4063 #endif 4064 4065 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4066 peer_identity_addreses); 4067 return true; 4068 } 4069 4070 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4071 4072 /* fall through */ 4073 4074 case LE_RESOLVING_LIST_ADD_ENTRIES: 4075 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4076 uint8_t offset = i >> 3; 4077 uint8_t mask = 1 << (i & 7); 4078 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4079 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4080 bd_addr_t peer_identity_addreses; 4081 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4082 sm_key_t peer_irk; 4083 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4084 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4085 const uint8_t *local_irk = gap_get_persistent_irk(); 4086 // command uses format specifier 'P' that stores 16-byte value without flip 4087 uint8_t local_irk_flipped[16]; 4088 uint8_t peer_irk_flipped[16]; 4089 reverse_128(local_irk, local_irk_flipped); 4090 reverse_128(peer_irk, peer_irk_flipped); 4091 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4092 peer_irk_flipped, local_irk_flipped); 4093 return true; 4094 } 4095 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4096 break; 4097 4098 default: 4099 break; 4100 } 4101 } 4102 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4103 #endif 4104 4105 // Phase 4: restore state 4106 4107 #ifdef ENABLE_LE_CENTRAL 4108 // re-start scanning 4109 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4110 hci_stack->le_scanning_active = true; 4111 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4112 return true; 4113 } 4114 #endif 4115 4116 #ifdef ENABLE_LE_CENTRAL 4117 // re-start connecting 4118 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4119 bd_addr_t null_addr; 4120 memset(null_addr, 0, 6); 4121 hci_send_cmd(&hci_le_create_connection, 4122 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4123 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4124 1, // use whitelist 4125 0, // peer address type 4126 null_addr, // peer bd addr 4127 hci_stack->le_own_addr_type, // our addr type: 4128 hci_stack->le_connection_interval_min, // conn interval min 4129 hci_stack->le_connection_interval_max, // conn interval max 4130 hci_stack->le_connection_latency, // conn latency 4131 hci_stack->le_supervision_timeout, // conn latency 4132 hci_stack->le_minimum_ce_length, // min ce length 4133 hci_stack->le_maximum_ce_length // max ce length 4134 ); 4135 return true; 4136 } 4137 #endif 4138 4139 #ifdef ENABLE_LE_PERIPHERAL 4140 // re-start advertising 4141 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4142 // check if advertisements should be enabled given 4143 hci_stack->le_advertisements_active = true; 4144 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4145 return true; 4146 } 4147 #endif 4148 4149 return false; 4150 } 4151 #endif 4152 4153 static bool hci_run_general_pending_commands(void){ 4154 btstack_linked_item_t * it; 4155 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4156 hci_connection_t * connection = (hci_connection_t *) it; 4157 4158 switch(connection->state){ 4159 case SEND_CREATE_CONNECTION: 4160 switch(connection->address_type){ 4161 #ifdef ENABLE_CLASSIC 4162 case BD_ADDR_TYPE_ACL: 4163 log_info("sending hci_create_connection"); 4164 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4165 break; 4166 #endif 4167 default: 4168 #ifdef ENABLE_BLE 4169 #ifdef ENABLE_LE_CENTRAL 4170 log_info("sending hci_le_create_connection"); 4171 hci_send_cmd(&hci_le_create_connection, 4172 hci_stack->le_connection_scan_interval, // conn scan interval 4173 hci_stack->le_connection_scan_window, // conn scan windows 4174 0, // don't use whitelist 4175 connection->address_type, // peer address type 4176 connection->address, // peer bd addr 4177 hci_stack->le_own_addr_type, // our addr type: 4178 hci_stack->le_connection_interval_min, // conn interval min 4179 hci_stack->le_connection_interval_max, // conn interval max 4180 hci_stack->le_connection_latency, // conn latency 4181 hci_stack->le_supervision_timeout, // conn latency 4182 hci_stack->le_minimum_ce_length, // min ce length 4183 hci_stack->le_maximum_ce_length // max ce length 4184 ); 4185 connection->state = SENT_CREATE_CONNECTION; 4186 #endif 4187 #endif 4188 break; 4189 } 4190 return true; 4191 4192 #ifdef ENABLE_CLASSIC 4193 case RECEIVED_CONNECTION_REQUEST: 4194 connection->role = HCI_ROLE_SLAVE; 4195 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4196 log_info("sending hci_accept_connection_request"); 4197 connection->state = ACCEPTED_CONNECTION_REQUEST; 4198 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4199 } 4200 return true; 4201 #endif 4202 4203 #ifdef ENABLE_BLE 4204 #ifdef ENABLE_LE_CENTRAL 4205 case SEND_CANCEL_CONNECTION: 4206 connection->state = SENT_CANCEL_CONNECTION; 4207 hci_send_cmd(&hci_le_create_connection_cancel); 4208 return true; 4209 #endif 4210 #endif 4211 case SEND_DISCONNECT: 4212 connection->state = SENT_DISCONNECT; 4213 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4214 return true; 4215 4216 default: 4217 break; 4218 } 4219 4220 // no further commands if connection is about to get shut down 4221 if (connection->state == SENT_DISCONNECT) continue; 4222 4223 if (connection->authentication_flags & READ_RSSI){ 4224 connectionClearAuthenticationFlags(connection, READ_RSSI); 4225 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4226 return true; 4227 } 4228 4229 #ifdef ENABLE_CLASSIC 4230 4231 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4232 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4233 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4234 return true; 4235 } 4236 4237 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4238 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4239 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4240 4241 link_key_t link_key; 4242 link_key_type_t link_key_type; 4243 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4244 4245 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4246 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4247 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4248 if (sc_downgrade){ 4249 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4250 connection->state = SENT_DISCONNECT; 4251 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4252 return true; 4253 } 4254 4255 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4256 if (have_link_key && security_level_sufficient){ 4257 connection->link_key_type = link_key_type; 4258 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4259 } else { 4260 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4261 } 4262 return true; 4263 } 4264 4265 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4266 log_info("denying to pin request"); 4267 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4268 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4269 return true; 4270 } 4271 4272 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4273 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4274 // tweak authentication requirements 4275 uint8_t authreq = hci_stack->ssp_authentication_requirement; 4276 if (connection->bonding_flags & BONDING_DEDICATED){ 4277 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4278 } 4279 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4280 authreq |= 1; 4281 } 4282 uint8_t have_oob_data = 0; 4283 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4284 if (connection->classic_oob_c_192 != NULL){ 4285 have_oob_data |= 1; 4286 } 4287 if (connection->classic_oob_c_256 != NULL){ 4288 have_oob_data |= 2; 4289 } 4290 #endif 4291 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4292 return true; 4293 } 4294 4295 if (connection->authentication_flags & SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4296 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4297 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4298 return true; 4299 } 4300 4301 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4302 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4303 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4304 const uint8_t zero[16] = { 0 }; 4305 const uint8_t * r_192 = zero; 4306 const uint8_t * c_192 = zero; 4307 const uint8_t * r_256 = zero; 4308 const uint8_t * c_256 = zero; 4309 // verify P-256 OOB 4310 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4311 c_256 = connection->classic_oob_c_256; 4312 if (connection->classic_oob_r_256 != NULL) { 4313 r_256 = connection->classic_oob_r_256; 4314 } 4315 } 4316 // verify P-192 OOB 4317 if ((connection->classic_oob_c_192 != NULL)) { 4318 c_192 = connection->classic_oob_c_192; 4319 if (connection->classic_oob_r_192 != NULL) { 4320 r_192 = connection->classic_oob_r_192; 4321 } 4322 } 4323 // Reply 4324 if (c_256 != zero) { 4325 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4326 } else if (c_192 != zero){ 4327 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4328 } else { 4329 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4330 } 4331 return true; 4332 } 4333 #endif 4334 4335 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4336 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4337 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4338 return true; 4339 } 4340 4341 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4342 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4343 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4344 return true; 4345 } 4346 4347 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4348 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4349 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4350 return true; 4351 } 4352 4353 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4354 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4355 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4356 return true; 4357 } 4358 4359 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4360 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4361 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4362 return true; 4363 } 4364 4365 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4366 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4367 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4368 connection->state = SENT_DISCONNECT; 4369 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4370 return true; 4371 } 4372 4373 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4374 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4375 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4376 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4377 return true; 4378 } 4379 4380 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4381 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4382 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4383 return true; 4384 } 4385 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4386 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4387 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4388 return true; 4389 } 4390 #endif 4391 4392 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4393 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4394 if (connection->state != SENT_DISCONNECT){ 4395 connection->state = SENT_DISCONNECT; 4396 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4397 return true; 4398 } 4399 } 4400 4401 #ifdef ENABLE_CLASSIC 4402 uint16_t sniff_min_interval; 4403 switch (connection->sniff_min_interval){ 4404 case 0: 4405 break; 4406 case 0xffff: 4407 connection->sniff_min_interval = 0; 4408 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4409 return true; 4410 default: 4411 sniff_min_interval = connection->sniff_min_interval; 4412 connection->sniff_min_interval = 0; 4413 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4414 return true; 4415 } 4416 4417 if (connection->request_role != HCI_ROLE_INVALID){ 4418 hci_role_t role = connection->request_role; 4419 connection->request_role = HCI_ROLE_INVALID; 4420 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4421 return true; 4422 } 4423 #endif 4424 4425 #ifdef ENABLE_BLE 4426 switch (connection->le_con_parameter_update_state){ 4427 // response to L2CAP CON PARAMETER UPDATE REQUEST 4428 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4429 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4430 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4431 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4432 0x0000, 0xffff); 4433 return true; 4434 case CON_PARAMETER_UPDATE_REPLY: 4435 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4436 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4437 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4438 0x0000, 0xffff); 4439 return true; 4440 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4441 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4442 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4443 return true; 4444 default: 4445 break; 4446 } 4447 if (connection->le_phy_update_all_phys != 0xffu){ 4448 uint8_t all_phys = connection->le_phy_update_all_phys; 4449 connection->le_phy_update_all_phys = 0xff; 4450 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); 4451 return true; 4452 } 4453 #endif 4454 } 4455 return false; 4456 } 4457 4458 static void hci_run(void){ 4459 4460 bool done; 4461 4462 // send continuation fragments first, as they block the prepared packet buffer 4463 done = hci_run_acl_fragments(); 4464 if (done) return; 4465 4466 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4467 // send host num completed packets next as they don't require num_cmd_packets > 0 4468 if (!hci_can_send_comand_packet_transport()) return; 4469 if (hci_stack->host_completed_packets){ 4470 hci_host_num_completed_packets(); 4471 return; 4472 } 4473 #endif 4474 4475 if (!hci_can_send_command_packet_now()) return; 4476 4477 // global/non-connection oriented commands 4478 4479 4480 #ifdef ENABLE_CLASSIC 4481 // general gap classic 4482 done = hci_run_general_gap_classic(); 4483 if (done) return; 4484 #endif 4485 4486 #ifdef ENABLE_BLE 4487 // general gap le 4488 done = hci_run_general_gap_le(); 4489 if (done) return; 4490 #endif 4491 4492 // send pending HCI commands 4493 done = hci_run_general_pending_commands(); 4494 if (done) return; 4495 4496 // stack state sub statemachines 4497 hci_connection_t * connection; 4498 switch (hci_stack->state){ 4499 case HCI_STATE_INITIALIZING: 4500 hci_initializing_run(); 4501 break; 4502 4503 case HCI_STATE_HALTING: 4504 4505 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4506 switch (hci_stack->substate){ 4507 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4508 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4509 4510 #ifdef ENABLE_BLE 4511 #ifdef ENABLE_LE_CENTRAL 4512 // free whitelist entries 4513 { 4514 btstack_linked_list_iterator_t lit; 4515 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4516 while (btstack_linked_list_iterator_has_next(&lit)){ 4517 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4518 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4519 btstack_memory_whitelist_entry_free(entry); 4520 } 4521 } 4522 #endif 4523 #endif 4524 // close all open connections 4525 connection = (hci_connection_t *) hci_stack->connections; 4526 if (connection){ 4527 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4528 if (!hci_can_send_command_packet_now()) return; 4529 4530 // check state 4531 if (connection->state == SENT_DISCONNECT) return; 4532 connection->state = SENT_DISCONNECT; 4533 4534 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4535 4536 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4537 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4538 4539 // ... which would be ignored anyway as we shutdown (free) the connection now 4540 hci_shutdown_connection(connection); 4541 4542 // finally, send the disconnect command 4543 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4544 return; 4545 } 4546 4547 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4548 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4549 log_info("HCI_STATE_HALTING: wait 50 ms"); 4550 hci_stack->substate = HCI_HALTING_W4_TIMER; 4551 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4552 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4553 btstack_run_loop_add_timer(&hci_stack->timeout); 4554 break; 4555 } 4556 4557 /* fall through */ 4558 4559 case HCI_HALTING_CLOSE: 4560 log_info("HCI_STATE_HALTING, calling off"); 4561 4562 // switch mode 4563 hci_power_control_off(); 4564 4565 log_info("HCI_STATE_HALTING, emitting state"); 4566 hci_emit_state(); 4567 log_info("HCI_STATE_HALTING, done"); 4568 break; 4569 4570 case HCI_HALTING_W4_TIMER: 4571 // keep waiting 4572 4573 break; 4574 default: 4575 break; 4576 } 4577 4578 break; 4579 4580 case HCI_STATE_FALLING_ASLEEP: 4581 switch(hci_stack->substate) { 4582 case HCI_FALLING_ASLEEP_DISCONNECT: 4583 log_info("HCI_STATE_FALLING_ASLEEP"); 4584 // close all open connections 4585 connection = (hci_connection_t *) hci_stack->connections; 4586 4587 #ifdef HAVE_PLATFORM_IPHONE_OS 4588 // don't close connections, if H4 supports power management 4589 if (btstack_control_iphone_power_management_enabled()){ 4590 connection = NULL; 4591 } 4592 #endif 4593 if (connection){ 4594 4595 // send disconnect 4596 if (!hci_can_send_command_packet_now()) return; 4597 4598 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4599 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4600 4601 // send disconnected event right away - causes higher layer connections to get closed, too. 4602 hci_shutdown_connection(connection); 4603 return; 4604 } 4605 4606 if (hci_classic_supported()){ 4607 // disable page and inquiry scan 4608 if (!hci_can_send_command_packet_now()) return; 4609 4610 log_info("HCI_STATE_HALTING, disabling inq scans"); 4611 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4612 4613 // continue in next sub state 4614 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4615 break; 4616 } 4617 4618 /* fall through */ 4619 4620 case HCI_FALLING_ASLEEP_COMPLETE: 4621 log_info("HCI_STATE_HALTING, calling sleep"); 4622 #ifdef HAVE_PLATFORM_IPHONE_OS 4623 // don't actually go to sleep, if H4 supports power management 4624 if (btstack_control_iphone_power_management_enabled()){ 4625 // SLEEP MODE reached 4626 hci_stack->state = HCI_STATE_SLEEPING; 4627 hci_emit_state(); 4628 break; 4629 } 4630 #endif 4631 // switch mode 4632 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4633 hci_emit_state(); 4634 break; 4635 4636 default: 4637 break; 4638 } 4639 break; 4640 4641 default: 4642 break; 4643 } 4644 } 4645 4646 int hci_send_cmd_packet(uint8_t *packet, int size){ 4647 // house-keeping 4648 4649 #ifdef ENABLE_CLASSIC 4650 bd_addr_t addr; 4651 hci_connection_t * conn; 4652 #endif 4653 #ifdef ENABLE_LE_CENTRAL 4654 uint8_t initiator_filter_policy; 4655 #endif 4656 4657 uint16_t opcode = little_endian_read_16(packet, 0); 4658 switch (opcode) { 4659 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4660 hci_stack->loopback_mode = packet[3]; 4661 break; 4662 4663 #ifdef ENABLE_CLASSIC 4664 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4665 reverse_bd_addr(&packet[3], addr); 4666 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4667 4668 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4669 if (!conn) { 4670 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4671 if (!conn) { 4672 // notify client that alloc failed 4673 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4674 return -1; // packet not sent to controller 4675 } 4676 conn->state = SEND_CREATE_CONNECTION; 4677 conn->role = HCI_ROLE_MASTER; 4678 } 4679 log_info("conn state %u", conn->state); 4680 switch (conn->state) { 4681 // if connection active exists 4682 case OPEN: 4683 // and OPEN, emit connection complete command 4684 hci_emit_connection_complete(addr, conn->con_handle, 0); 4685 return -1; // packet not sent to controller 4686 case RECEIVED_DISCONNECTION_COMPLETE: 4687 // create connection triggered in disconnect complete event, let's do it now 4688 break; 4689 case SEND_CREATE_CONNECTION: 4690 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4691 break; 4692 default: 4693 // otherwise, just ignore as it is already in the open process 4694 return -1; // packet not sent to controller 4695 } 4696 conn->state = SENT_CREATE_CONNECTION; 4697 4698 // track outgoing connection 4699 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4700 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4701 break; 4702 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4703 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4704 break; 4705 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4706 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4707 break; 4708 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4709 if (hci_stack->link_key_db) { 4710 reverse_bd_addr(&packet[3], addr); 4711 hci_stack->link_key_db->delete_link_key(addr); 4712 } 4713 break; 4714 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4715 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4716 reverse_bd_addr(&packet[3], addr); 4717 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4718 if (conn) { 4719 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4720 } 4721 break; 4722 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4723 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4724 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4725 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4726 reverse_bd_addr(&packet[3], addr); 4727 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4728 if (conn) { 4729 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4730 } 4731 break; 4732 4733 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 4734 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4735 // setup_synchronous_connection? Voice setting at offset 22 4736 // TODO: compare to current setting if sco connection already active 4737 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4738 break; 4739 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4740 // accept_synchronus_connection? Voice setting at offset 18 4741 // TODO: compare to current setting if sco connection already active 4742 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4743 break; 4744 #endif 4745 #endif 4746 4747 #ifdef ENABLE_BLE 4748 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4749 hci_stack->le_random_address_set = 1; 4750 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4751 break; 4752 #ifdef ENABLE_LE_PERIPHERAL 4753 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4754 hci_stack->le_advertisements_active = packet[3] != 0; 4755 break; 4756 #endif 4757 #ifdef ENABLE_LE_CENTRAL 4758 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4759 // white list used? 4760 initiator_filter_policy = packet[7]; 4761 switch (initiator_filter_policy) { 4762 case 0: 4763 // whitelist not used 4764 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4765 break; 4766 case 1: 4767 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4768 break; 4769 default: 4770 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4771 break; 4772 } 4773 // track outgoing connection 4774 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4775 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4776 break; 4777 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4778 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4779 break; 4780 #endif 4781 #endif 4782 default: 4783 break; 4784 } 4785 4786 hci_stack->num_cmd_packets--; 4787 4788 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4789 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4790 } 4791 4792 // disconnect because of security block 4793 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4794 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4795 if (!connection) return; 4796 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4797 } 4798 4799 4800 // Configure Secure Simple Pairing 4801 4802 #ifdef ENABLE_CLASSIC 4803 4804 // enable will enable SSP during init 4805 void gap_ssp_set_enable(int enable){ 4806 hci_stack->ssp_enable = enable; 4807 } 4808 4809 static int hci_local_ssp_activated(void){ 4810 return gap_ssp_supported() && hci_stack->ssp_enable; 4811 } 4812 4813 // if set, BTstack will respond to io capability request using authentication requirement 4814 void gap_ssp_set_io_capability(int io_capability){ 4815 hci_stack->ssp_io_capability = io_capability; 4816 } 4817 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4818 hci_stack->ssp_authentication_requirement = authentication_requirement; 4819 } 4820 4821 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4822 void gap_ssp_set_auto_accept(int auto_accept){ 4823 hci_stack->ssp_auto_accept = auto_accept; 4824 } 4825 4826 void gap_secure_connections_enable(bool enable){ 4827 hci_stack->secure_connections_enable = enable; 4828 } 4829 4830 #endif 4831 4832 // va_list part of hci_send_cmd 4833 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4834 if (!hci_can_send_command_packet_now()){ 4835 log_error("hci_send_cmd called but cannot send packet now"); 4836 return 0; 4837 } 4838 4839 // for HCI INITIALIZATION 4840 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4841 hci_stack->last_cmd_opcode = cmd->opcode; 4842 4843 hci_reserve_packet_buffer(); 4844 uint8_t * packet = hci_stack->hci_packet_buffer; 4845 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4846 int err = hci_send_cmd_packet(packet, size); 4847 4848 // release packet buffer on error or for synchronous transport implementations 4849 if ((err < 0) || hci_transport_synchronous()){ 4850 hci_release_packet_buffer(); 4851 hci_emit_transport_packet_sent(); 4852 } 4853 4854 return err; 4855 } 4856 4857 /** 4858 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4859 */ 4860 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4861 va_list argptr; 4862 va_start(argptr, cmd); 4863 int res = hci_send_cmd_va_arg(cmd, argptr); 4864 va_end(argptr); 4865 return res; 4866 } 4867 4868 // Create various non-HCI events. 4869 // TODO: generalize, use table similar to hci_create_command 4870 4871 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4872 // dump packet 4873 if (dump) { 4874 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4875 } 4876 4877 // dispatch to all event handlers 4878 btstack_linked_list_iterator_t it; 4879 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4880 while (btstack_linked_list_iterator_has_next(&it)){ 4881 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4882 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4883 } 4884 } 4885 4886 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4887 if (!hci_stack->acl_packet_handler) return; 4888 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4889 } 4890 4891 #ifdef ENABLE_CLASSIC 4892 static void hci_notify_if_sco_can_send_now(void){ 4893 // notify SCO sender if waiting 4894 if (!hci_stack->sco_waiting_for_can_send_now) return; 4895 if (hci_can_send_sco_packet_now()){ 4896 hci_stack->sco_waiting_for_can_send_now = 0; 4897 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4898 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4899 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4900 } 4901 } 4902 4903 // parsing end emitting has been merged to reduce code size 4904 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4905 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4906 4907 uint8_t * eir_data; 4908 ad_context_t context; 4909 const uint8_t * name; 4910 uint8_t name_len; 4911 4912 if (size < 3) return; 4913 4914 int event_type = hci_event_packet_get_type(packet); 4915 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4916 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4917 4918 switch (event_type){ 4919 case HCI_EVENT_INQUIRY_RESULT: 4920 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4921 if (size != (3 + (num_responses * 14))) return; 4922 break; 4923 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4924 if (size != 257) return; 4925 if (num_responses != 1) return; 4926 break; 4927 default: 4928 return; 4929 } 4930 4931 // event[1] is set at the end 4932 int i; 4933 for (i=0; i<num_responses;i++){ 4934 memset(event, 0, sizeof(event)); 4935 event[0] = GAP_EVENT_INQUIRY_RESULT; 4936 uint8_t event_size = 18; // if name is not set by EIR 4937 4938 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4939 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4940 (void)memcpy(&event[9], 4941 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4942 3); // class of device 4943 (void)memcpy(&event[12], 4944 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4945 2); // clock offset 4946 4947 switch (event_type){ 4948 case HCI_EVENT_INQUIRY_RESULT: 4949 // 14,15,16,17 = 0, size 18 4950 break; 4951 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4952 event[14] = 1; 4953 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4954 // 16,17 = 0, size 18 4955 break; 4956 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4957 event[14] = 1; 4958 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4959 // EIR packets only contain a single inquiry response 4960 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4961 name = NULL; 4962 // Iterate over EIR data 4963 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4964 uint8_t data_type = ad_iterator_get_data_type(&context); 4965 uint8_t data_size = ad_iterator_get_data_len(&context); 4966 const uint8_t * data = ad_iterator_get_data(&context); 4967 // Prefer Complete Local Name over Shortend Local Name 4968 switch (data_type){ 4969 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4970 if (name) continue; 4971 /* fall through */ 4972 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4973 name = data; 4974 name_len = data_size; 4975 break; 4976 default: 4977 break; 4978 } 4979 } 4980 if (name){ 4981 event[16] = 1; 4982 // truncate name if needed 4983 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4984 event[17] = len; 4985 (void)memcpy(&event[18], name, len); 4986 event_size += len; 4987 } 4988 break; 4989 default: 4990 return; 4991 } 4992 event[1] = event_size - 2; 4993 hci_emit_event(event, event_size, 1); 4994 } 4995 } 4996 #endif 4997 4998 void hci_emit_state(void){ 4999 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5000 uint8_t event[3]; 5001 event[0] = BTSTACK_EVENT_STATE; 5002 event[1] = sizeof(event) - 2u; 5003 event[2] = hci_stack->state; 5004 hci_emit_event(event, sizeof(event), 1); 5005 } 5006 5007 #ifdef ENABLE_CLASSIC 5008 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5009 uint8_t event[13]; 5010 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5011 event[1] = sizeof(event) - 2; 5012 event[2] = status; 5013 little_endian_store_16(event, 3, con_handle); 5014 reverse_bd_addr(address, &event[5]); 5015 event[11] = 1; // ACL connection 5016 event[12] = 0; // encryption disabled 5017 hci_emit_event(event, sizeof(event), 1); 5018 } 5019 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5020 if (disable_l2cap_timeouts) return; 5021 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5022 uint8_t event[4]; 5023 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5024 event[1] = sizeof(event) - 2; 5025 little_endian_store_16(event, 2, conn->con_handle); 5026 hci_emit_event(event, sizeof(event), 1); 5027 } 5028 #endif 5029 5030 #ifdef ENABLE_BLE 5031 #ifdef ENABLE_LE_CENTRAL 5032 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){ 5033 uint8_t event[21]; 5034 event[0] = HCI_EVENT_LE_META; 5035 event[1] = sizeof(event) - 2u; 5036 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5037 event[3] = status; 5038 little_endian_store_16(event, 4, con_handle); 5039 event[6] = 0; // TODO: role 5040 event[7] = address_type; 5041 reverse_bd_addr(address, &event[8]); 5042 little_endian_store_16(event, 14, 0); // interval 5043 little_endian_store_16(event, 16, 0); // latency 5044 little_endian_store_16(event, 18, 0); // supervision timeout 5045 event[20] = 0; // master clock accuracy 5046 hci_emit_event(event, sizeof(event), 1); 5047 } 5048 #endif 5049 #endif 5050 5051 static void hci_emit_transport_packet_sent(void){ 5052 // notify upper stack that it might be possible to send again 5053 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5054 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5055 } 5056 5057 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5058 uint8_t event[6]; 5059 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5060 event[1] = sizeof(event) - 2u; 5061 event[2] = 0; // status = OK 5062 little_endian_store_16(event, 3, con_handle); 5063 event[5] = reason; 5064 hci_emit_event(event, sizeof(event), 1); 5065 } 5066 5067 static void hci_emit_nr_connections_changed(void){ 5068 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5069 uint8_t event[3]; 5070 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5071 event[1] = sizeof(event) - 2u; 5072 event[2] = nr_hci_connections(); 5073 hci_emit_event(event, sizeof(event), 1); 5074 } 5075 5076 static void hci_emit_hci_open_failed(void){ 5077 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5078 uint8_t event[2]; 5079 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5080 event[1] = sizeof(event) - 2u; 5081 hci_emit_event(event, sizeof(event), 1); 5082 } 5083 5084 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5085 log_info("hci_emit_dedicated_bonding_result %u ", status); 5086 uint8_t event[9]; 5087 int pos = 0; 5088 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5089 event[pos++] = sizeof(event) - 2u; 5090 event[pos++] = status; 5091 reverse_bd_addr(address, &event[pos]); 5092 hci_emit_event(event, sizeof(event), 1); 5093 } 5094 5095 5096 #ifdef ENABLE_CLASSIC 5097 5098 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5099 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5100 uint8_t event[5]; 5101 int pos = 0; 5102 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5103 event[pos++] = sizeof(event) - 2; 5104 little_endian_store_16(event, 2, con_handle); 5105 pos += 2; 5106 event[pos++] = level; 5107 hci_emit_event(event, sizeof(event), 1); 5108 } 5109 5110 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5111 if (!connection) return LEVEL_0; 5112 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5113 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5114 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5115 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5116 // LEVEL 4 always requires 128 bit encrytion key size 5117 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5118 security_level = LEVEL_3; 5119 } 5120 return security_level; 5121 } 5122 5123 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5124 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5125 uint8_t event[3]; 5126 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5127 event[1] = sizeof(event) - 2; 5128 event[2] = enabled; 5129 hci_emit_event(event, sizeof(event), 1); 5130 } 5131 5132 // query if remote side supports eSCO 5133 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5134 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5135 if (!connection) return 0; 5136 return (connection->remote_supported_features[0] & 1) != 0; 5137 } 5138 5139 static bool hci_ssp_supported(hci_connection_t * connection){ 5140 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5141 return (connection->bonding_flags & mask) == mask; 5142 } 5143 5144 // query if remote side supports SSP 5145 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5146 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5147 if (!connection) return 0; 5148 return hci_ssp_supported(connection) ? 1 : 0; 5149 } 5150 5151 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5152 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5153 } 5154 5155 // GAP API 5156 /** 5157 * @bbrief enable/disable bonding. default is enabled 5158 * @praram enabled 5159 */ 5160 void gap_set_bondable_mode(int enable){ 5161 hci_stack->bondable = enable ? 1 : 0; 5162 } 5163 /** 5164 * @brief Get bondable mode. 5165 * @return 1 if bondable 5166 */ 5167 int gap_get_bondable_mode(void){ 5168 return hci_stack->bondable; 5169 } 5170 5171 /** 5172 * @brief map link keys to security levels 5173 */ 5174 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5175 switch (link_key_type){ 5176 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5177 return LEVEL_4; 5178 case COMBINATION_KEY: 5179 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5180 return LEVEL_3; 5181 default: 5182 return LEVEL_2; 5183 } 5184 } 5185 5186 /** 5187 * @brief map link keys to secure connection yes/no 5188 */ 5189 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5190 switch (link_key_type){ 5191 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5192 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5193 return 1; 5194 default: 5195 return 0; 5196 } 5197 } 5198 5199 /** 5200 * @brief map link keys to authenticated 5201 */ 5202 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5203 switch (link_key_type){ 5204 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5205 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5206 return 1; 5207 default: 5208 return 0; 5209 } 5210 } 5211 5212 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5213 log_info("gap_mitm_protection_required_for_security_level %u", level); 5214 return level > LEVEL_2; 5215 } 5216 5217 /** 5218 * @brief get current security level 5219 */ 5220 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5221 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5222 if (!connection) return LEVEL_0; 5223 return gap_security_level_for_connection(connection); 5224 } 5225 5226 /** 5227 * @brief request connection to device to 5228 * @result GAP_AUTHENTICATION_RESULT 5229 */ 5230 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5231 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5232 if (!connection){ 5233 hci_emit_security_level(con_handle, LEVEL_0); 5234 return; 5235 } 5236 5237 btstack_assert(hci_is_le_connection(connection) == false); 5238 5239 gap_security_level_t current_level = gap_security_level(con_handle); 5240 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5241 requested_level, connection->requested_security_level, current_level); 5242 5243 // assumption: earlier requested security higher than current level => security request is active 5244 if (current_level < connection->requested_security_level){ 5245 if (connection->requested_security_level < requested_level){ 5246 // increase requested level as new level is higher 5247 5248 // TODO: handle re-authentication when done 5249 5250 connection->requested_security_level = requested_level; 5251 } 5252 return; 5253 } 5254 5255 // no request active, notify if security sufficient 5256 if (requested_level <= current_level){ 5257 hci_emit_security_level(con_handle, current_level); 5258 return; 5259 } 5260 5261 // store request 5262 connection->requested_security_level = requested_level; 5263 5264 // start to authenticate connection if authentication not already active 5265 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5266 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5267 hci_run(); 5268 } 5269 5270 /** 5271 * @brief start dedicated bonding with device. disconnect after bonding 5272 * @param device 5273 * @param request MITM protection 5274 * @result GAP_DEDICATED_BONDING_COMPLETE 5275 */ 5276 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5277 5278 // create connection state machine 5279 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5280 5281 if (!connection){ 5282 return BTSTACK_MEMORY_ALLOC_FAILED; 5283 } 5284 5285 // delete linkn key 5286 gap_drop_link_key_for_bd_addr(device); 5287 5288 // configure LEVEL_2/3, dedicated bonding 5289 connection->state = SEND_CREATE_CONNECTION; 5290 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5291 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5292 connection->bonding_flags = BONDING_DEDICATED; 5293 5294 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5295 5296 // handle: connnection failure (connection complete != ok) 5297 // handle: authentication failure 5298 // handle: disconnect on done 5299 5300 hci_run(); 5301 5302 return 0; 5303 } 5304 #endif 5305 5306 void gap_set_local_name(const char * local_name){ 5307 hci_stack->local_name = local_name; 5308 } 5309 5310 5311 #ifdef ENABLE_BLE 5312 5313 #ifdef ENABLE_LE_CENTRAL 5314 void gap_start_scan(void){ 5315 hci_stack->le_scanning_enabled = true; 5316 hci_run(); 5317 } 5318 5319 void gap_stop_scan(void){ 5320 hci_stack->le_scanning_enabled = false; 5321 hci_run(); 5322 } 5323 5324 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5325 hci_stack->le_scan_type = scan_type; 5326 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5327 hci_stack->le_scan_interval = scan_interval; 5328 hci_stack->le_scan_window = scan_window; 5329 hci_stack->le_scanning_param_update = true; 5330 hci_run(); 5331 } 5332 5333 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5334 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5335 } 5336 5337 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5338 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5339 if (!conn){ 5340 // disallow if le connection is already outgoing 5341 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5342 log_error("le connection already active"); 5343 return ERROR_CODE_COMMAND_DISALLOWED; 5344 } 5345 5346 log_info("gap_connect: no connection exists yet, creating context"); 5347 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5348 if (!conn){ 5349 // notify client that alloc failed 5350 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5351 log_info("gap_connect: failed to alloc hci_connection_t"); 5352 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5353 } 5354 5355 // set le connecting state 5356 if (hci_is_le_connection_type(addr_type)){ 5357 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5358 } 5359 5360 conn->state = SEND_CREATE_CONNECTION; 5361 log_info("gap_connect: send create connection next"); 5362 hci_run(); 5363 return ERROR_CODE_SUCCESS; 5364 } 5365 5366 if (!hci_is_le_connection(conn) || 5367 (conn->state == SEND_CREATE_CONNECTION) || 5368 (conn->state == SENT_CREATE_CONNECTION)) { 5369 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5370 log_error("gap_connect: classic connection or connect is already being created"); 5371 return GATT_CLIENT_IN_WRONG_STATE; 5372 } 5373 5374 // check if connection was just disconnected 5375 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5376 log_info("gap_connect: send create connection (again)"); 5377 conn->state = SEND_CREATE_CONNECTION; 5378 hci_run(); 5379 return ERROR_CODE_SUCCESS; 5380 } 5381 5382 log_info("gap_connect: context exists with state %u", conn->state); 5383 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5384 hci_run(); 5385 return ERROR_CODE_SUCCESS; 5386 } 5387 5388 // @assumption: only a single outgoing LE Connection exists 5389 static hci_connection_t * gap_get_outgoing_connection(void){ 5390 btstack_linked_item_t *it; 5391 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5392 hci_connection_t * conn = (hci_connection_t *) it; 5393 if (!hci_is_le_connection(conn)) continue; 5394 switch (conn->state){ 5395 case SEND_CREATE_CONNECTION: 5396 case SENT_CREATE_CONNECTION: 5397 case SENT_CANCEL_CONNECTION: 5398 return conn; 5399 default: 5400 break; 5401 }; 5402 } 5403 return NULL; 5404 } 5405 5406 uint8_t gap_connect_cancel(void){ 5407 hci_connection_t * conn = gap_get_outgoing_connection(); 5408 if (!conn) return 0; 5409 switch (conn->state){ 5410 case SEND_CREATE_CONNECTION: 5411 // skip sending create connection and emit event instead 5412 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5413 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5414 btstack_memory_hci_connection_free( conn ); 5415 break; 5416 case SENT_CREATE_CONNECTION: 5417 // request to send cancel connection 5418 conn->state = SEND_CANCEL_CONNECTION; 5419 hci_run(); 5420 break; 5421 default: 5422 break; 5423 } 5424 return 0; 5425 } 5426 #endif 5427 5428 #ifdef ENABLE_LE_CENTRAL 5429 /** 5430 * @brief Set connection parameters for outgoing connections 5431 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5432 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5433 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5434 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5435 * @param conn_latency, default: 4 5436 * @param supervision_timeout (unit: 10ms), default: 720 ms 5437 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5438 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5439 */ 5440 5441 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5442 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5443 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5444 hci_stack->le_connection_scan_interval = conn_scan_interval; 5445 hci_stack->le_connection_scan_window = conn_scan_window; 5446 hci_stack->le_connection_interval_min = conn_interval_min; 5447 hci_stack->le_connection_interval_max = conn_interval_max; 5448 hci_stack->le_connection_latency = conn_latency; 5449 hci_stack->le_supervision_timeout = supervision_timeout; 5450 hci_stack->le_minimum_ce_length = min_ce_length; 5451 hci_stack->le_maximum_ce_length = max_ce_length; 5452 } 5453 #endif 5454 5455 /** 5456 * @brief Updates the connection parameters for a given LE connection 5457 * @param handle 5458 * @param conn_interval_min (unit: 1.25ms) 5459 * @param conn_interval_max (unit: 1.25ms) 5460 * @param conn_latency 5461 * @param supervision_timeout (unit: 10ms) 5462 * @returns 0 if ok 5463 */ 5464 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5465 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5466 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5467 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5468 connection->le_conn_interval_min = conn_interval_min; 5469 connection->le_conn_interval_max = conn_interval_max; 5470 connection->le_conn_latency = conn_latency; 5471 connection->le_supervision_timeout = supervision_timeout; 5472 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5473 hci_run(); 5474 return 0; 5475 } 5476 5477 /** 5478 * @brief Request an update of the connection parameter for a given LE connection 5479 * @param handle 5480 * @param conn_interval_min (unit: 1.25ms) 5481 * @param conn_interval_max (unit: 1.25ms) 5482 * @param conn_latency 5483 * @param supervision_timeout (unit: 10ms) 5484 * @returns 0 if ok 5485 */ 5486 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5487 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5488 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5489 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5490 connection->le_conn_interval_min = conn_interval_min; 5491 connection->le_conn_interval_max = conn_interval_max; 5492 connection->le_conn_latency = conn_latency; 5493 connection->le_supervision_timeout = supervision_timeout; 5494 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5495 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5496 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5497 return 0; 5498 } 5499 5500 #ifdef ENABLE_LE_PERIPHERAL 5501 5502 /** 5503 * @brief Set Advertisement Data 5504 * @param advertising_data_length 5505 * @param advertising_data (max 31 octets) 5506 * @note data is not copied, pointer has to stay valid 5507 */ 5508 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5509 hci_stack->le_advertisements_data_len = advertising_data_length; 5510 hci_stack->le_advertisements_data = advertising_data; 5511 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5512 hci_run(); 5513 } 5514 5515 /** 5516 * @brief Set Scan Response Data 5517 * @param advertising_data_length 5518 * @param advertising_data (max 31 octets) 5519 * @note data is not copied, pointer has to stay valid 5520 */ 5521 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5522 hci_stack->le_scan_response_data_len = scan_response_data_length; 5523 hci_stack->le_scan_response_data = scan_response_data; 5524 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5525 hci_run(); 5526 } 5527 5528 /** 5529 * @brief Set Advertisement Parameters 5530 * @param adv_int_min 5531 * @param adv_int_max 5532 * @param adv_type 5533 * @param direct_address_type 5534 * @param direct_address 5535 * @param channel_map 5536 * @param filter_policy 5537 * 5538 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5539 */ 5540 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5541 uint8_t direct_address_typ, bd_addr_t direct_address, 5542 uint8_t channel_map, uint8_t filter_policy) { 5543 5544 hci_stack->le_advertisements_interval_min = adv_int_min; 5545 hci_stack->le_advertisements_interval_max = adv_int_max; 5546 hci_stack->le_advertisements_type = adv_type; 5547 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5548 hci_stack->le_advertisements_channel_map = channel_map; 5549 hci_stack->le_advertisements_filter_policy = filter_policy; 5550 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5551 6); 5552 5553 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5554 hci_run(); 5555 } 5556 5557 /** 5558 * @brief Enable/Disable Advertisements 5559 * @param enabled 5560 */ 5561 void gap_advertisements_enable(int enabled){ 5562 hci_stack->le_advertisements_enabled = enabled != 0; 5563 hci_update_advertisements_enabled_for_current_roles(); 5564 hci_run(); 5565 } 5566 5567 #endif 5568 5569 void hci_le_set_own_address_type(uint8_t own_address_type){ 5570 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5571 if (own_address_type == hci_stack->le_own_addr_type) return; 5572 hci_stack->le_own_addr_type = own_address_type; 5573 5574 #ifdef ENABLE_LE_PERIPHERAL 5575 // update advertisement parameters, too 5576 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5577 hci_run(); 5578 #endif 5579 #ifdef ENABLE_LE_CENTRAL 5580 // note: we don't update scan parameters or modify ongoing connection attempts 5581 #endif 5582 } 5583 5584 #endif 5585 5586 uint8_t gap_disconnect(hci_con_handle_t handle){ 5587 hci_connection_t * conn = hci_connection_for_handle(handle); 5588 if (!conn){ 5589 hci_emit_disconnection_complete(handle, 0); 5590 return 0; 5591 } 5592 // ignore if already disconnected 5593 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5594 return 0; 5595 } 5596 conn->state = SEND_DISCONNECT; 5597 hci_run(); 5598 return 0; 5599 } 5600 5601 int gap_read_rssi(hci_con_handle_t con_handle){ 5602 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5603 if (hci_connection == NULL) return 0; 5604 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5605 hci_run(); 5606 return 1; 5607 } 5608 5609 /** 5610 * @brief Get connection type 5611 * @param con_handle 5612 * @result connection_type 5613 */ 5614 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5615 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5616 if (!conn) return GAP_CONNECTION_INVALID; 5617 switch (conn->address_type){ 5618 case BD_ADDR_TYPE_LE_PUBLIC: 5619 case BD_ADDR_TYPE_LE_RANDOM: 5620 return GAP_CONNECTION_LE; 5621 case BD_ADDR_TYPE_SCO: 5622 return GAP_CONNECTION_SCO; 5623 case BD_ADDR_TYPE_ACL: 5624 return GAP_CONNECTION_ACL; 5625 default: 5626 return GAP_CONNECTION_INVALID; 5627 } 5628 } 5629 5630 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5631 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5632 if (!conn) return HCI_ROLE_INVALID; 5633 return (hci_role_t) conn->role; 5634 } 5635 5636 5637 #ifdef ENABLE_CLASSIC 5638 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5639 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5640 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5641 conn->request_role = role; 5642 hci_run(); 5643 return ERROR_CODE_SUCCESS; 5644 } 5645 #endif 5646 5647 #ifdef ENABLE_BLE 5648 5649 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){ 5650 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5651 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5652 5653 conn->le_phy_update_all_phys = all_phys; 5654 conn->le_phy_update_tx_phys = tx_phys; 5655 conn->le_phy_update_rx_phys = rx_phys; 5656 conn->le_phy_update_phy_options = phy_options; 5657 5658 hci_run(); 5659 5660 return 0; 5661 } 5662 5663 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5664 // check if already in list 5665 btstack_linked_list_iterator_t it; 5666 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5667 while (btstack_linked_list_iterator_has_next(&it)) { 5668 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5669 if (entry->address_type != address_type) { 5670 continue; 5671 } 5672 if (memcmp(entry->address, address, 6) != 0) { 5673 continue; 5674 } 5675 // disallow if already scheduled to add 5676 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5677 return ERROR_CODE_COMMAND_DISALLOWED; 5678 } 5679 // still on controller, but scheduled to remove -> re-add 5680 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5681 return ERROR_CODE_SUCCESS; 5682 } 5683 // alloc and add to list 5684 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5685 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5686 entry->address_type = address_type; 5687 (void)memcpy(entry->address, address, 6); 5688 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5689 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5690 return ERROR_CODE_SUCCESS; 5691 } 5692 5693 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5694 btstack_linked_list_iterator_t it; 5695 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5696 while (btstack_linked_list_iterator_has_next(&it)){ 5697 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5698 if (entry->address_type != address_type) { 5699 continue; 5700 } 5701 if (memcmp(entry->address, address, 6) != 0) { 5702 continue; 5703 } 5704 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5705 // remove from controller if already present 5706 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5707 } else { 5708 // directly remove entry from whitelist 5709 btstack_linked_list_iterator_remove(&it); 5710 btstack_memory_whitelist_entry_free(entry); 5711 } 5712 return ERROR_CODE_SUCCESS; 5713 } 5714 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5715 } 5716 5717 static void hci_whitelist_clear(void){ 5718 btstack_linked_list_iterator_t it; 5719 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5720 while (btstack_linked_list_iterator_has_next(&it)){ 5721 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5722 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5723 // remove from controller if already present 5724 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5725 continue; 5726 } 5727 // directly remove entry from whitelist 5728 btstack_linked_list_iterator_remove(&it); 5729 btstack_memory_whitelist_entry_free(entry); 5730 } 5731 } 5732 5733 /** 5734 * @brief Clear Whitelist 5735 * @returns 0 if ok 5736 */ 5737 uint8_t gap_whitelist_clear(void){ 5738 hci_whitelist_clear(); 5739 hci_run(); 5740 return ERROR_CODE_SUCCESS; 5741 } 5742 5743 /** 5744 * @brief Add Device to Whitelist 5745 * @param address_typ 5746 * @param address 5747 * @returns 0 if ok 5748 */ 5749 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5750 uint8_t status = hci_whitelist_add(address_type, address); 5751 if (status){ 5752 return status; 5753 } 5754 hci_run(); 5755 return ERROR_CODE_SUCCESS; 5756 } 5757 5758 /** 5759 * @brief Remove Device from Whitelist 5760 * @param address_typ 5761 * @param address 5762 * @returns 0 if ok 5763 */ 5764 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5765 uint8_t status = hci_whitelist_remove(address_type, address); 5766 if (status){ 5767 return status; 5768 } 5769 hci_run(); 5770 return ERROR_CODE_SUCCESS; 5771 } 5772 5773 #ifdef ENABLE_LE_CENTRAL 5774 /** 5775 * @brief Connect with Whitelist 5776 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5777 * @returns - if ok 5778 */ 5779 uint8_t gap_connect_with_whitelist(void){ 5780 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5781 return ERROR_CODE_COMMAND_DISALLOWED; 5782 } 5783 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5784 hci_run(); 5785 return ERROR_CODE_SUCCESS; 5786 } 5787 5788 /** 5789 * @brief Auto Connection Establishment - Start Connecting to device 5790 * @param address_typ 5791 * @param address 5792 * @returns 0 if ok 5793 */ 5794 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5795 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5796 return ERROR_CODE_COMMAND_DISALLOWED; 5797 } 5798 5799 uint8_t status = hci_whitelist_add(address_type, address); 5800 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5801 return status; 5802 } 5803 5804 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5805 5806 hci_run(); 5807 return ERROR_CODE_SUCCESS; 5808 } 5809 5810 /** 5811 * @brief Auto Connection Establishment - Stop Connecting to device 5812 * @param address_typ 5813 * @param address 5814 * @returns 0 if ok 5815 */ 5816 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5817 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5818 return ERROR_CODE_COMMAND_DISALLOWED; 5819 } 5820 5821 hci_whitelist_remove(address_type, address); 5822 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5823 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5824 } 5825 hci_run(); 5826 return 0; 5827 } 5828 5829 /** 5830 * @brief Auto Connection Establishment - Stop everything 5831 * @note Convenience function to stop all active auto connection attempts 5832 */ 5833 uint8_t gap_auto_connection_stop_all(void){ 5834 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5835 return ERROR_CODE_COMMAND_DISALLOWED; 5836 } 5837 hci_whitelist_clear(); 5838 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5839 hci_run(); 5840 return ERROR_CODE_SUCCESS; 5841 } 5842 5843 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5844 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5845 if (!conn) return 0; 5846 return conn->le_connection_interval; 5847 } 5848 #endif 5849 #endif 5850 5851 #ifdef ENABLE_CLASSIC 5852 /** 5853 * @brief Set Extended Inquiry Response data 5854 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5855 * @note has to be done before stack starts up 5856 */ 5857 void gap_set_extended_inquiry_response(const uint8_t * data){ 5858 hci_stack->eir_data = data; 5859 } 5860 5861 /** 5862 * @brief Start GAP Classic Inquiry 5863 * @param duration in 1.28s units 5864 * @return 0 if ok 5865 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5866 */ 5867 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5868 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5869 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5870 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5871 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5872 } 5873 hci_stack->inquiry_state = duration_in_1280ms_units; 5874 hci_run(); 5875 return 0; 5876 } 5877 5878 /** 5879 * @brief Stop GAP Classic Inquiry 5880 * @returns 0 if ok 5881 */ 5882 int gap_inquiry_stop(void){ 5883 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5884 // emit inquiry complete event, before it even started 5885 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5886 hci_emit_event(event, sizeof(event), 1); 5887 return 0; 5888 } 5889 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5890 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5891 hci_run(); 5892 return 0; 5893 } 5894 5895 5896 /** 5897 * @brief Remote Name Request 5898 * @param addr 5899 * @param page_scan_repetition_mode 5900 * @param clock_offset only used when bit 15 is set 5901 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5902 */ 5903 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5904 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5905 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5906 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5907 hci_stack->remote_name_clock_offset = clock_offset; 5908 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5909 hci_run(); 5910 return 0; 5911 } 5912 5913 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 5914 hci_stack->gap_pairing_state = state; 5915 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5916 hci_run(); 5917 return 0; 5918 } 5919 5920 /** 5921 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5922 * @param addr 5923 * @param pin_data 5924 * @param pin_len 5925 * @return 0 if ok 5926 */ 5927 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5928 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5929 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5930 hci_stack->gap_pairing_pin_len = pin_len; 5931 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5932 } 5933 5934 /** 5935 * @brief Legacy Pairing Pin Code Response 5936 * @param addr 5937 * @param pin 5938 * @return 0 if ok 5939 */ 5940 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 5941 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5942 } 5943 5944 /** 5945 * @brief Abort Legacy Pairing 5946 * @param addr 5947 * @param pin 5948 * @return 0 if ok 5949 */ 5950 int gap_pin_code_negative(bd_addr_t addr){ 5951 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5952 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5953 } 5954 5955 /** 5956 * @brief SSP Passkey Response 5957 * @param addr 5958 * @param passkey 5959 * @return 0 if ok 5960 */ 5961 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 5962 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5963 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5964 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5965 } 5966 5967 /** 5968 * @brief Abort SSP Passkey Entry/Pairing 5969 * @param addr 5970 * @param pin 5971 * @return 0 if ok 5972 */ 5973 int gap_ssp_passkey_negative(const bd_addr_t addr){ 5974 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5975 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5976 } 5977 5978 /** 5979 * @brief Accept SSP Numeric Comparison 5980 * @param addr 5981 * @param passkey 5982 * @return 0 if ok 5983 */ 5984 int gap_ssp_confirmation_response(const bd_addr_t addr){ 5985 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5986 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5987 } 5988 5989 /** 5990 * @brief Abort SSP Numeric Comparison/Pairing 5991 * @param addr 5992 * @param pin 5993 * @return 0 if ok 5994 */ 5995 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 5996 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5997 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5998 } 5999 6000 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6001 6002 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6003 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6004 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6005 connectionSetAuthenticationFlags(conn, flag); 6006 hci_run(); 6007 return ERROR_CODE_SUCCESS; 6008 } 6009 6010 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6011 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6012 } 6013 6014 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6015 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6016 } 6017 #endif 6018 6019 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6020 /** 6021 * @brief Report Remote OOB Data 6022 * @param bd_addr 6023 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6024 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6025 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6026 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6027 */ 6028 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){ 6029 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6030 if (connection == NULL) { 6031 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6032 } 6033 connection->classic_oob_c_192 = c_192; 6034 connection->classic_oob_r_192 = r_192; 6035 connection->classic_oob_c_256 = c_256; 6036 connection->classic_oob_r_256 = r_256; 6037 return ERROR_CODE_SUCCESS; 6038 } 6039 /** 6040 * @brief Generate new OOB data 6041 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6042 */ 6043 void gap_ssp_generate_oob_data(void){ 6044 hci_stack->classic_read_local_oob_data = true; 6045 hci_run(); 6046 } 6047 6048 #endif 6049 6050 /** 6051 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6052 * @param inquiry_mode see bluetooth_defines.h 6053 */ 6054 void hci_set_inquiry_mode(inquiry_mode_t mode){ 6055 hci_stack->inquiry_mode = mode; 6056 } 6057 6058 /** 6059 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6060 */ 6061 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6062 hci_stack->sco_voice_setting = voice_setting; 6063 } 6064 6065 /** 6066 * @brief Get SCO Voice Setting 6067 * @return current voice setting 6068 */ 6069 uint16_t hci_get_sco_voice_setting(void){ 6070 return hci_stack->sco_voice_setting; 6071 } 6072 6073 static int hci_have_usb_transport(void){ 6074 if (!hci_stack->hci_transport) return 0; 6075 const char * transport_name = hci_stack->hci_transport->name; 6076 if (!transport_name) return 0; 6077 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6078 } 6079 6080 /** @brief Get SCO packet length for current SCO Voice setting 6081 * @note Using SCO packets of the exact length is required for USB transfer 6082 * @return Length of SCO packets in bytes (not audio frames) 6083 */ 6084 int hci_get_sco_packet_length(void){ 6085 int sco_packet_length = 0; 6086 int multiplier; 6087 #ifdef ENABLE_SCO_OVER_HCI 6088 6089 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6090 multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6091 6092 if (hci_have_usb_transport()){ 6093 // see Core Spec for H2 USB Transfer. 6094 // 3 byte SCO header + 24 bytes per connection 6095 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6096 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6097 } else { 6098 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6099 sco_packet_length = 3 + 60 * multiplier; 6100 // assert that it still fits inside an SCO buffer 6101 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6102 sco_packet_length = 3 + 60; 6103 } 6104 } 6105 #endif 6106 6107 #ifdef HAVE_SCO_TRANSPORT 6108 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6109 multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6110 sco_packet_length = 3 + 60 * multiplier; 6111 #endif 6112 6113 return sco_packet_length; 6114 } 6115 6116 /** 6117 * @brief Sets the master/slave policy 6118 * @param policy (0: attempt to become master, 1: let connecting device decide) 6119 */ 6120 void hci_set_master_slave_policy(uint8_t policy){ 6121 hci_stack->master_slave_policy = policy; 6122 } 6123 6124 #endif 6125 6126 HCI_STATE hci_get_state(void){ 6127 return hci_stack->state; 6128 } 6129 6130 #ifdef ENABLE_CLASSIC 6131 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6132 hci_stack->gap_classic_accept_callback = accept_callback; 6133 } 6134 #endif 6135 6136 /** 6137 * @brief Set callback for Bluetooth Hardware Error 6138 */ 6139 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6140 hci_stack->hardware_error_callback = fn; 6141 } 6142 6143 void hci_disconnect_all(void){ 6144 btstack_linked_list_iterator_t it; 6145 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6146 while (btstack_linked_list_iterator_has_next(&it)){ 6147 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6148 if (con->state == SENT_DISCONNECT) continue; 6149 con->state = SEND_DISCONNECT; 6150 } 6151 hci_run(); 6152 } 6153 6154 uint16_t hci_get_manufacturer(void){ 6155 return hci_stack->manufacturer; 6156 } 6157 6158 #ifdef ENABLE_BLE 6159 6160 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6161 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6162 if (!hci_con) return NULL; 6163 return &hci_con->sm_connection; 6164 } 6165 6166 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6167 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6168 6169 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6170 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6171 if (hci_connection == NULL) return 0; 6172 if (hci_is_le_connection(hci_connection)){ 6173 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6174 if (sm_conn->sm_connection_encrypted) { 6175 return sm_conn->sm_actual_encryption_key_size; 6176 } 6177 } 6178 #ifdef ENABLE_CLASSIC 6179 else { 6180 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 6181 return hci_connection->encryption_key_size; 6182 } 6183 } 6184 #endif 6185 return 0; 6186 } 6187 6188 int gap_authenticated(hci_con_handle_t con_handle){ 6189 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6190 if (hci_connection == NULL) return 0; 6191 6192 switch (hci_connection->address_type){ 6193 case BD_ADDR_TYPE_LE_PUBLIC: 6194 case BD_ADDR_TYPE_LE_RANDOM: 6195 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6196 return hci_connection->sm_connection.sm_connection_authenticated; 6197 #ifdef ENABLE_CLASSIC 6198 case BD_ADDR_TYPE_SCO: 6199 case BD_ADDR_TYPE_ACL: 6200 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6201 #endif 6202 default: 6203 return 0; 6204 } 6205 } 6206 6207 int gap_secure_connection(hci_con_handle_t con_handle){ 6208 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6209 if (hci_connection == NULL) return 0; 6210 6211 switch (hci_connection->address_type){ 6212 case BD_ADDR_TYPE_LE_PUBLIC: 6213 case BD_ADDR_TYPE_LE_RANDOM: 6214 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6215 return hci_connection->sm_connection.sm_connection_sc; 6216 #ifdef ENABLE_CLASSIC 6217 case BD_ADDR_TYPE_SCO: 6218 case BD_ADDR_TYPE_ACL: 6219 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6220 #endif 6221 default: 6222 return 0; 6223 } 6224 } 6225 6226 bool gap_bonded(hci_con_handle_t con_handle){ 6227 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6228 if (hci_connection == NULL) return 0; 6229 6230 #ifdef ENABLE_CLASSIC 6231 link_key_t link_key; 6232 link_key_type_t link_key_type; 6233 #endif 6234 switch (hci_connection->address_type){ 6235 case BD_ADDR_TYPE_LE_PUBLIC: 6236 case BD_ADDR_TYPE_LE_RANDOM: 6237 return hci_connection->sm_connection.sm_le_db_index >= 0; 6238 #ifdef ENABLE_CLASSIC 6239 case BD_ADDR_TYPE_SCO: 6240 case BD_ADDR_TYPE_ACL: 6241 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6242 #endif 6243 default: 6244 return false; 6245 } 6246 } 6247 6248 6249 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6250 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6251 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6252 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6253 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6254 return sm_conn->sm_connection_authorization_state; 6255 } 6256 #endif 6257 6258 #ifdef ENABLE_CLASSIC 6259 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){ 6260 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6261 if (!conn) return GAP_CONNECTION_INVALID; 6262 conn->sniff_min_interval = sniff_min_interval; 6263 conn->sniff_max_interval = sniff_max_interval; 6264 conn->sniff_attempt = sniff_attempt; 6265 conn->sniff_timeout = sniff_timeout; 6266 hci_run(); 6267 return 0; 6268 } 6269 6270 /** 6271 * @brief Exit Sniff mode 6272 * @param con_handle 6273 @ @return 0 if ok 6274 */ 6275 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6276 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6277 if (!conn) return GAP_CONNECTION_INVALID; 6278 conn->sniff_min_interval = 0xffff; 6279 hci_run(); 6280 return 0; 6281 } 6282 #endif 6283 6284 void hci_halting_defer(void){ 6285 if (hci_stack->state != HCI_STATE_HALTING) return; 6286 switch (hci_stack->substate){ 6287 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6288 case HCI_HALTING_CLOSE: 6289 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6290 break; 6291 default: 6292 break; 6293 } 6294 } 6295 6296 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6297 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6298 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6299 if (le_device_db_index >= le_device_db_max_count()) return; 6300 uint8_t offset = le_device_db_index >> 3; 6301 uint8_t mask = 1 << (le_device_db_index & 7); 6302 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6303 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6304 // note: go back to remove entries, otherwise, a remove + add will skip the add 6305 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6306 } 6307 } 6308 6309 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6310 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6311 if (le_device_db_index >= le_device_db_max_count()) return; 6312 uint8_t offset = le_device_db_index >> 3; 6313 uint8_t mask = 1 << (le_device_db_index & 7); 6314 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6315 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6316 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6317 } 6318 } 6319 6320 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6321 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6322 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6323 } 6324 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6325 // restart le resolving list update 6326 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6327 } 6328 return ERROR_CODE_SUCCESS; 6329 } 6330 #endif 6331 6332 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6333 void hci_setup_test_connections_fuzz(void){ 6334 hci_connection_t * conn; 6335 6336 // default address: 66:55:44:33:00:01 6337 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6338 6339 // setup Controller info 6340 hci_stack->num_cmd_packets = 255; 6341 hci_stack->acl_packets_total_num = 255; 6342 6343 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6344 addr[5] = 0x01; 6345 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6346 conn->con_handle = addr[5]; 6347 conn->role = HCI_ROLE_SLAVE; 6348 conn->state = RECEIVED_CONNECTION_REQUEST; 6349 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6350 6351 // setup incoming Classic SCO connection with con handle 0x0002 6352 addr[5] = 0x02; 6353 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6354 conn->con_handle = addr[5]; 6355 conn->role = HCI_ROLE_SLAVE; 6356 conn->state = RECEIVED_CONNECTION_REQUEST; 6357 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6358 6359 // setup ready Classic ACL connection with con handle 0x0003 6360 addr[5] = 0x03; 6361 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6362 conn->con_handle = addr[5]; 6363 conn->role = HCI_ROLE_SLAVE; 6364 conn->state = OPEN; 6365 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6366 6367 // setup ready Classic SCO connection with con handle 0x0004 6368 addr[5] = 0x04; 6369 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6370 conn->con_handle = addr[5]; 6371 conn->role = HCI_ROLE_SLAVE; 6372 conn->state = OPEN; 6373 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6374 6375 // setup ready LE ACL connection with con handle 0x005 and public address 6376 addr[5] = 0x05; 6377 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6378 conn->con_handle = addr[5]; 6379 conn->role = HCI_ROLE_SLAVE; 6380 conn->state = OPEN; 6381 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6382 } 6383 6384 void hci_free_connections_fuzz(void){ 6385 btstack_linked_list_iterator_t it; 6386 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6387 while (btstack_linked_list_iterator_has_next(&it)){ 6388 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6389 btstack_linked_list_iterator_remove(&it); 6390 btstack_memory_hci_connection_free(con); 6391 } 6392 } 6393 void hci_simulate_working_fuzz(void){ 6394 hci_init_done(); 6395 hci_stack->num_cmd_packets = 255; 6396 } 6397 #endif 6398