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