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