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 int hci_is_le_connection(hci_connection_t * connection){ 433 switch (connection->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 1; 439 default: 440 return 0; 441 } 442 } 443 444 /** 445 * count connections 446 */ 447 static int nr_hci_connections(void){ 448 int count = 0; 449 btstack_linked_item_t *it; 450 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 451 count++; 452 } 453 return count; 454 } 455 456 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 457 458 unsigned int num_packets_sent_classic = 0; 459 unsigned int num_packets_sent_le = 0; 460 461 btstack_linked_item_t *it; 462 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 463 hci_connection_t * connection = (hci_connection_t *) it; 464 if (hci_is_le_connection(connection)){ 465 num_packets_sent_le += connection->num_packets_sent; 466 } 467 if (connection->address_type == BD_ADDR_TYPE_ACL){ 468 num_packets_sent_classic += connection->num_packets_sent; 469 } 470 } 471 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 472 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 473 int free_slots_le = 0; 474 475 if (free_slots_classic < 0){ 476 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); 477 return 0; 478 } 479 480 if (hci_stack->le_acl_packets_total_num){ 481 // if we have LE slots, they are used 482 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 483 if (free_slots_le < 0){ 484 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); 485 return 0; 486 } 487 } else { 488 // otherwise, classic slots are used for LE, too 489 free_slots_classic -= num_packets_sent_le; 490 if (free_slots_classic < 0){ 491 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); 492 return 0; 493 } 494 } 495 496 switch (address_type){ 497 case BD_ADDR_TYPE_UNKNOWN: 498 log_error("hci_number_free_acl_slots: unknown address type"); 499 return 0; 500 501 case BD_ADDR_TYPE_ACL: 502 return free_slots_classic; 503 504 default: 505 if (hci_stack->le_acl_packets_total_num){ 506 return free_slots_le; 507 } 508 return free_slots_classic; 509 } 510 } 511 512 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 513 // get connection type 514 hci_connection_t * connection = hci_connection_for_handle(con_handle); 515 if (!connection){ 516 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 517 return 0; 518 } 519 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 520 } 521 522 #ifdef ENABLE_CLASSIC 523 static int hci_number_free_sco_slots(void){ 524 unsigned int num_sco_packets_sent = 0; 525 btstack_linked_item_t *it; 526 if (hci_stack->synchronous_flow_control_enabled){ 527 // explicit flow control 528 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 529 hci_connection_t * connection = (hci_connection_t *) it; 530 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 531 num_sco_packets_sent += connection->num_packets_sent; 532 } 533 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 534 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 535 return 0; 536 } 537 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 538 } else { 539 // implicit flow control -- TODO 540 int num_ready = 0; 541 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 542 hci_connection_t * connection = (hci_connection_t *) it; 543 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 544 if (connection->sco_tx_ready == 0) continue; 545 num_ready++; 546 } 547 return num_ready; 548 } 549 } 550 #endif 551 552 // only used to send HCI Host Number Completed Packets 553 static int hci_can_send_comand_packet_transport(void){ 554 if (hci_stack->hci_packet_buffer_reserved) return 0; 555 556 // check for async hci transport implementations 557 if (hci_stack->hci_transport->can_send_packet_now){ 558 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 559 return 0; 560 } 561 } 562 return 1; 563 } 564 565 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 566 int hci_can_send_command_packet_now(void){ 567 if (hci_can_send_comand_packet_transport() == 0) return 0; 568 return hci_stack->num_cmd_packets > 0u; 569 } 570 571 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 572 // check for async hci transport implementations 573 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 574 return hci_stack->hci_transport->can_send_packet_now(packet_type); 575 } 576 577 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 578 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 579 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 580 } 581 582 int hci_can_send_acl_le_packet_now(void){ 583 if (hci_stack->hci_packet_buffer_reserved) return 0; 584 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 585 } 586 587 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 588 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 589 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 590 } 591 592 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 593 if (hci_stack->hci_packet_buffer_reserved) return 0; 594 return hci_can_send_prepared_acl_packet_now(con_handle); 595 } 596 597 #ifdef ENABLE_CLASSIC 598 int hci_can_send_acl_classic_packet_now(void){ 599 if (hci_stack->hci_packet_buffer_reserved) return 0; 600 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 601 } 602 603 int hci_can_send_prepared_sco_packet_now(void){ 604 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 605 if (hci_have_usb_transport()){ 606 return hci_stack->sco_can_send_now; 607 } else { 608 return hci_number_free_sco_slots() > 0; 609 } 610 } 611 612 int hci_can_send_sco_packet_now(void){ 613 if (hci_stack->hci_packet_buffer_reserved) return 0; 614 return hci_can_send_prepared_sco_packet_now(); 615 } 616 617 void hci_request_sco_can_send_now_event(void){ 618 hci_stack->sco_waiting_for_can_send_now = 1; 619 hci_notify_if_sco_can_send_now(); 620 } 621 #endif 622 623 // used for internal checks in l2cap.c 624 int hci_is_packet_buffer_reserved(void){ 625 return hci_stack->hci_packet_buffer_reserved; 626 } 627 628 // reserves outgoing packet buffer. @returns 1 if successful 629 int hci_reserve_packet_buffer(void){ 630 if (hci_stack->hci_packet_buffer_reserved) { 631 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 632 return 0; 633 } 634 hci_stack->hci_packet_buffer_reserved = 1; 635 return 1; 636 } 637 638 void hci_release_packet_buffer(void){ 639 hci_stack->hci_packet_buffer_reserved = 0; 640 } 641 642 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 643 static int hci_transport_synchronous(void){ 644 return hci_stack->hci_transport->can_send_packet_now == NULL; 645 } 646 647 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 648 649 // 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); 650 651 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 652 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 653 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 654 max_acl_data_packet_length = hci_stack->le_data_packets_length; 655 } 656 657 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 658 if (hci_is_le_connection(connection)){ 659 max_acl_data_packet_length = connection->le_max_tx_octets; 660 } 661 #endif 662 663 log_debug("hci_send_acl_packet_fragments entered"); 664 665 int err; 666 // multiple packets could be send on a synchronous HCI transport 667 while (true){ 668 669 log_debug("hci_send_acl_packet_fragments loop entered"); 670 671 // get current data 672 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 673 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 674 int more_fragments = 0; 675 676 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 677 if (current_acl_data_packet_length > max_acl_data_packet_length){ 678 more_fragments = 1; 679 current_acl_data_packet_length = max_acl_data_packet_length; 680 } 681 682 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 683 if (acl_header_pos > 0u){ 684 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 685 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 686 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 687 } 688 689 // update header len 690 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 691 692 // count packet 693 connection->num_packets_sent++; 694 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 695 696 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 697 if (more_fragments){ 698 // update start of next fragment to send 699 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 700 } else { 701 // done 702 hci_stack->acl_fragmentation_pos = 0; 703 hci_stack->acl_fragmentation_total_size = 0; 704 } 705 706 // send packet 707 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 708 const int size = current_acl_data_packet_length + 4; 709 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 710 hci_stack->acl_fragmentation_tx_active = 1; 711 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 712 713 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 714 715 // done yet? 716 if (!more_fragments) break; 717 718 // can send more? 719 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 720 } 721 722 log_debug("hci_send_acl_packet_fragments loop over"); 723 724 // release buffer now for synchronous transport 725 if (hci_transport_synchronous()){ 726 hci_stack->acl_fragmentation_tx_active = 0; 727 hci_release_packet_buffer(); 728 hci_emit_transport_packet_sent(); 729 } 730 731 return err; 732 } 733 734 // pre: caller has reserved the packet buffer 735 int hci_send_acl_packet_buffer(int size){ 736 737 // log_info("hci_send_acl_packet_buffer size %u", size); 738 739 if (!hci_stack->hci_packet_buffer_reserved) { 740 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 741 return 0; 742 } 743 744 uint8_t * packet = hci_stack->hci_packet_buffer; 745 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 746 747 // check for free places on Bluetooth module 748 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 749 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 750 hci_release_packet_buffer(); 751 hci_emit_transport_packet_sent(); 752 return BTSTACK_ACL_BUFFERS_FULL; 753 } 754 755 hci_connection_t *connection = hci_connection_for_handle( con_handle); 756 if (!connection) { 757 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 758 hci_release_packet_buffer(); 759 hci_emit_transport_packet_sent(); 760 return 0; 761 } 762 763 #ifdef ENABLE_CLASSIC 764 hci_connection_timestamp(connection); 765 #endif 766 767 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 768 769 // setup data 770 hci_stack->acl_fragmentation_total_size = size; 771 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 772 773 return hci_send_acl_packet_fragments(connection); 774 } 775 776 #ifdef ENABLE_CLASSIC 777 // pre: caller has reserved the packet buffer 778 int hci_send_sco_packet_buffer(int size){ 779 780 // log_info("hci_send_acl_packet_buffer size %u", size); 781 782 if (!hci_stack->hci_packet_buffer_reserved) { 783 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 784 return 0; 785 } 786 787 uint8_t * packet = hci_stack->hci_packet_buffer; 788 789 // skip checks in loopback mode 790 if (!hci_stack->loopback_mode){ 791 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 792 793 // check for free places on Bluetooth module 794 if (!hci_can_send_prepared_sco_packet_now()) { 795 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 796 hci_release_packet_buffer(); 797 hci_emit_transport_packet_sent(); 798 return BTSTACK_ACL_BUFFERS_FULL; 799 } 800 801 // track send packet in connection struct 802 hci_connection_t *connection = hci_connection_for_handle( con_handle); 803 if (!connection) { 804 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 805 hci_release_packet_buffer(); 806 hci_emit_transport_packet_sent(); 807 return 0; 808 } 809 810 if (hci_have_usb_transport()){ 811 // token used 812 hci_stack->sco_can_send_now = 0; 813 } else { 814 if (hci_stack->synchronous_flow_control_enabled){ 815 connection->num_packets_sent++; 816 } else { 817 connection->sco_tx_ready--; 818 } 819 } 820 } 821 822 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 823 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 824 825 if (hci_transport_synchronous()){ 826 hci_release_packet_buffer(); 827 hci_emit_transport_packet_sent(); 828 } 829 830 return err; 831 } 832 #endif 833 834 static void acl_handler(uint8_t *packet, uint16_t size){ 835 836 // get info 837 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 838 hci_connection_t *conn = hci_connection_for_handle(con_handle); 839 uint8_t acl_flags = READ_ACL_FLAGS(packet); 840 uint16_t acl_length = READ_ACL_LENGTH(packet); 841 842 // ignore non-registered handle 843 if (!conn){ 844 log_error("acl_handler called with non-registered handle %u!" , con_handle); 845 return; 846 } 847 848 // assert packet is complete 849 if ((acl_length + 4u) != size){ 850 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 851 return; 852 } 853 854 #ifdef ENABLE_CLASSIC 855 // update idle timestamp 856 hci_connection_timestamp(conn); 857 #endif 858 859 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 860 hci_stack->host_completed_packets = 1; 861 conn->num_packets_completed++; 862 #endif 863 864 // handle different packet types 865 switch (acl_flags & 0x03u) { 866 867 case 0x01: // continuation fragment 868 869 // sanity checks 870 if (conn->acl_recombination_pos == 0u) { 871 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 872 return; 873 } 874 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 875 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 876 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 877 conn->acl_recombination_pos = 0; 878 return; 879 } 880 881 // append fragment payload (header already stored) 882 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 883 &packet[4], acl_length); 884 conn->acl_recombination_pos += acl_length; 885 886 // forward complete L2CAP packet if complete. 887 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 888 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 889 // reset recombination buffer 890 conn->acl_recombination_length = 0; 891 conn->acl_recombination_pos = 0; 892 } 893 break; 894 895 case 0x02: { // first fragment 896 897 // sanity check 898 if (conn->acl_recombination_pos) { 899 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 900 conn->acl_recombination_pos = 0; 901 } 902 903 // peek into L2CAP packet! 904 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 905 906 // compare fragment size to L2CAP packet size 907 if (acl_length >= (l2cap_length + 4u)){ 908 // forward fragment as L2CAP packet 909 hci_emit_acl_packet(packet, acl_length + 4u); 910 } else { 911 912 if (acl_length > HCI_ACL_BUFFER_SIZE){ 913 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 914 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 915 return; 916 } 917 918 // store first fragment and tweak acl length for complete package 919 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 920 packet, acl_length + 4u); 921 conn->acl_recombination_pos = acl_length + 4u; 922 conn->acl_recombination_length = l2cap_length; 923 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 924 } 925 break; 926 927 } 928 default: 929 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 930 return; 931 } 932 933 // execute main loop 934 hci_run(); 935 } 936 937 static void hci_shutdown_connection(hci_connection_t *conn){ 938 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 939 940 #ifdef ENABLE_CLASSIC 941 #ifdef ENABLE_SCO_OVER_HCI 942 int addr_type = conn->address_type; 943 #endif 944 #endif 945 946 btstack_run_loop_remove_timer(&conn->timeout); 947 948 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 949 btstack_memory_hci_connection_free( conn ); 950 951 // now it's gone 952 hci_emit_nr_connections_changed(); 953 954 #ifdef ENABLE_CLASSIC 955 #ifdef ENABLE_SCO_OVER_HCI 956 // update SCO 957 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 958 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 959 } 960 #endif 961 #endif 962 } 963 964 #ifdef ENABLE_CLASSIC 965 966 static const uint16_t packet_type_sizes[] = { 967 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 968 HCI_ACL_DH1_SIZE, 0, 0, 0, 969 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 970 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 971 }; 972 static const uint8_t packet_type_feature_requirement_bit[] = { 973 0, // 3 slot packets 974 1, // 5 slot packets 975 25, // EDR 2 mpbs 976 26, // EDR 3 mbps 977 39, // 3 slot EDR packts 978 40, // 5 slot EDR packet 979 }; 980 static const uint16_t packet_type_feature_packet_mask[] = { 981 0x0f00, // 3 slot packets 982 0xf000, // 5 slot packets 983 0x1102, // EDR 2 mpbs 984 0x2204, // EDR 3 mbps 985 0x0300, // 3 slot EDR packts 986 0x3000, // 5 slot EDR packet 987 }; 988 989 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 990 // enable packet types based on size 991 uint16_t packet_types = 0; 992 unsigned int i; 993 for (i=0;i<16;i++){ 994 if (packet_type_sizes[i] == 0) continue; 995 if (packet_type_sizes[i] <= buffer_size){ 996 packet_types |= 1 << i; 997 } 998 } 999 // disable packet types due to missing local supported features 1000 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1001 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1002 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1003 if (feature_set) continue; 1004 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1005 packet_types &= ~packet_type_feature_packet_mask[i]; 1006 } 1007 // flip bits for "may not be used" 1008 packet_types ^= 0x3306; 1009 return packet_types; 1010 } 1011 1012 uint16_t hci_usable_acl_packet_types(void){ 1013 return hci_stack->packet_types; 1014 } 1015 #endif 1016 1017 uint8_t* hci_get_outgoing_packet_buffer(void){ 1018 // hci packet buffer is >= acl data packet length 1019 return hci_stack->hci_packet_buffer; 1020 } 1021 1022 uint16_t hci_max_acl_data_packet_length(void){ 1023 return hci_stack->acl_data_packet_length; 1024 } 1025 1026 #ifdef ENABLE_CLASSIC 1027 int hci_extended_sco_link_supported(void){ 1028 // No. 31, byte 3, bit 7 1029 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1030 } 1031 #endif 1032 1033 int hci_non_flushable_packet_boundary_flag_supported(void){ 1034 // No. 54, byte 6, bit 6 1035 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1036 } 1037 1038 static int gap_ssp_supported(void){ 1039 // No. 51, byte 6, bit 3 1040 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1041 } 1042 1043 static int hci_classic_supported(void){ 1044 #ifdef ENABLE_CLASSIC 1045 // No. 37, byte 4, bit 5, = No BR/EDR Support 1046 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1047 #else 1048 return 0; 1049 #endif 1050 } 1051 1052 static int hci_le_supported(void){ 1053 #ifdef ENABLE_BLE 1054 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1055 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1056 #else 1057 return 0; 1058 #endif 1059 } 1060 1061 #ifdef ENABLE_BLE 1062 1063 /** 1064 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1065 */ 1066 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1067 *addr_type = hci_stack->le_own_addr_type; 1068 if (hci_stack->le_own_addr_type){ 1069 (void)memcpy(addr, hci_stack->le_random_address, 6); 1070 } else { 1071 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1072 } 1073 } 1074 1075 #ifdef ENABLE_LE_CENTRAL 1076 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1077 1078 int offset = 3; 1079 int num_reports = packet[offset]; 1080 offset += 1; 1081 1082 int i; 1083 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1084 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1085 for (i=0; (i<num_reports) && (offset < size);i++){ 1086 // sanity checks on data_length: 1087 uint8_t data_length = packet[offset + 8]; 1088 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1089 if ((offset + 9u + data_length + 1u) > size) return; 1090 // setup event 1091 uint8_t event_size = 10u + data_length; 1092 int pos = 0; 1093 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1094 event[pos++] = event_size; 1095 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1096 offset += 8; 1097 pos += 8; 1098 event[pos++] = packet[offset + 1 + data_length]; // rssi 1099 event[pos++] = data_length; 1100 offset++; 1101 (void)memcpy(&event[pos], &packet[offset], data_length); 1102 pos += data_length; 1103 offset += data_length + 1u; // rssi 1104 hci_emit_event(event, pos, 1); 1105 } 1106 } 1107 #endif 1108 #endif 1109 1110 #ifdef ENABLE_BLE 1111 #ifdef ENABLE_LE_PERIPHERAL 1112 static void hci_reenable_advertisements_if_needed(void){ 1113 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1114 // get number of active le slave connections 1115 int num_slave_connections = 0; 1116 btstack_linked_list_iterator_t it; 1117 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1118 while (btstack_linked_list_iterator_has_next(&it)){ 1119 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1120 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1121 if (con->state != OPEN) continue; 1122 if (con->role != HCI_ROLE_SLAVE) continue; 1123 if (!hci_is_le_connection(con)) continue; 1124 num_slave_connections++; 1125 } 1126 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1127 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1128 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1129 } 1130 } 1131 } 1132 #endif 1133 #endif 1134 1135 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1136 1137 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1138 if (!hci_stack->config) return 0; 1139 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1140 // Limit baud rate for Broadcom chipsets to 3 mbps 1141 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1142 baud_rate = 3000000; 1143 } 1144 return baud_rate; 1145 } 1146 1147 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1148 UNUSED(ds); 1149 1150 switch (hci_stack->substate){ 1151 case HCI_INIT_W4_SEND_RESET: 1152 log_info("Resend HCI Reset"); 1153 hci_stack->substate = HCI_INIT_SEND_RESET; 1154 hci_stack->num_cmd_packets = 1; 1155 hci_run(); 1156 break; 1157 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1158 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1159 if (hci_stack->hci_transport->reset_link){ 1160 hci_stack->hci_transport->reset_link(); 1161 } 1162 1163 /* fall through */ 1164 1165 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1166 log_info("Resend HCI Reset - CSR Warm Boot"); 1167 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1168 hci_stack->num_cmd_packets = 1; 1169 hci_run(); 1170 break; 1171 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1172 if (hci_stack->hci_transport->set_baudrate){ 1173 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1174 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1175 hci_stack->hci_transport->set_baudrate(baud_rate); 1176 } 1177 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1178 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1179 if (hci_stack->hci_transport->reset_link){ 1180 log_info("Link Reset"); 1181 hci_stack->hci_transport->reset_link(); 1182 } 1183 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1184 hci_run(); 1185 } 1186 break; 1187 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1188 // otherwise continue 1189 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1190 hci_send_cmd(&hci_read_local_supported_commands); 1191 break; 1192 default: 1193 break; 1194 } 1195 } 1196 #endif 1197 1198 static void hci_initializing_next_state(void){ 1199 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1200 } 1201 1202 // assumption: hci_can_send_command_packet_now() == true 1203 static void hci_initializing_run(void){ 1204 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1205 switch (hci_stack->substate){ 1206 case HCI_INIT_SEND_RESET: 1207 hci_state_reset(); 1208 1209 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1210 // prepare reset if command complete not received in 100ms 1211 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1212 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1213 btstack_run_loop_add_timer(&hci_stack->timeout); 1214 #endif 1215 // send command 1216 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1217 hci_send_cmd(&hci_reset); 1218 break; 1219 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1220 hci_send_cmd(&hci_read_local_version_information); 1221 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1222 break; 1223 case HCI_INIT_SEND_READ_LOCAL_NAME: 1224 hci_send_cmd(&hci_read_local_name); 1225 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1226 break; 1227 1228 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1229 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1230 hci_state_reset(); 1231 // prepare reset if command complete not received in 100ms 1232 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1233 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1234 btstack_run_loop_add_timer(&hci_stack->timeout); 1235 // send command 1236 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1237 hci_send_cmd(&hci_reset); 1238 break; 1239 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1240 hci_state_reset(); 1241 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1242 hci_send_cmd(&hci_reset); 1243 break; 1244 case HCI_INIT_SEND_BAUD_CHANGE: { 1245 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1246 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1247 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1248 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1249 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1250 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1251 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1252 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1253 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1254 btstack_run_loop_add_timer(&hci_stack->timeout); 1255 } 1256 break; 1257 } 1258 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1259 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1260 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1261 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1262 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1263 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1264 break; 1265 } 1266 case HCI_INIT_CUSTOM_INIT: 1267 // Custom initialization 1268 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1269 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1270 int send_cmd = 0; 1271 switch (hci_stack->chipset_result){ 1272 case BTSTACK_CHIPSET_VALID_COMMAND: 1273 send_cmd = 1; 1274 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1275 break; 1276 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1277 send_cmd = 1; 1278 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1279 log_info("CSR Warm Boot"); 1280 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1281 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1282 btstack_run_loop_add_timer(&hci_stack->timeout); 1283 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1284 && hci_stack->config 1285 && hci_stack->chipset 1286 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1287 && hci_stack->hci_transport->set_baudrate 1288 && hci_transport_uart_get_main_baud_rate()){ 1289 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1290 } else { 1291 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1292 } 1293 break; 1294 default: 1295 break; 1296 } 1297 1298 if (send_cmd){ 1299 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1300 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1301 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1302 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1303 break; 1304 } 1305 log_info("Init script done"); 1306 1307 // Init script download on Broadcom chipsets causes: 1308 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1309 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1310 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1311 1312 // - baud rate to reset, restore UART baud rate if needed 1313 int need_baud_change = hci_stack->config 1314 && hci_stack->chipset 1315 && hci_stack->chipset->set_baudrate_command 1316 && hci_stack->hci_transport->set_baudrate 1317 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1318 if (need_baud_change) { 1319 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1320 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1321 hci_stack->hci_transport->set_baudrate(baud_rate); 1322 } 1323 1324 uint16_t bcm_delay_ms = 300; 1325 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1326 // -> Work around: wait here. 1327 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1328 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1329 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1330 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1331 btstack_run_loop_add_timer(&hci_stack->timeout); 1332 break; 1333 } 1334 } 1335 // otherwise continue 1336 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1337 hci_send_cmd(&hci_read_local_supported_commands); 1338 break; 1339 case HCI_INIT_SET_BD_ADDR: 1340 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1341 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1342 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1343 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1344 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1345 break; 1346 #endif 1347 1348 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1349 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1350 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1351 hci_send_cmd(&hci_read_local_supported_commands); 1352 break; 1353 case HCI_INIT_READ_BD_ADDR: 1354 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1355 hci_send_cmd(&hci_read_bd_addr); 1356 break; 1357 case HCI_INIT_READ_BUFFER_SIZE: 1358 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1359 hci_send_cmd(&hci_read_buffer_size); 1360 break; 1361 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1362 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1363 hci_send_cmd(&hci_read_local_supported_features); 1364 break; 1365 1366 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1367 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1368 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1369 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1370 break; 1371 case HCI_INIT_HOST_BUFFER_SIZE: 1372 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1373 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1374 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1375 break; 1376 #endif 1377 1378 case HCI_INIT_SET_EVENT_MASK: 1379 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1380 if (hci_le_supported()){ 1381 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1382 } else { 1383 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1384 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1385 } 1386 break; 1387 1388 #ifdef ENABLE_CLASSIC 1389 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1390 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1391 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1392 break; 1393 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1394 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1395 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1396 break; 1397 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1398 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1399 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1400 break; 1401 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1402 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1403 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1404 break; 1405 case HCI_INIT_WRITE_LOCAL_NAME: { 1406 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1407 hci_reserve_packet_buffer(); 1408 uint8_t * packet = hci_stack->hci_packet_buffer; 1409 // construct HCI Command and send 1410 uint16_t opcode = hci_write_local_name.opcode; 1411 hci_stack->last_cmd_opcode = opcode; 1412 packet[0] = opcode & 0xff; 1413 packet[1] = opcode >> 8; 1414 packet[2] = DEVICE_NAME_LEN; 1415 memset(&packet[3], 0, DEVICE_NAME_LEN); 1416 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1417 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1418 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1419 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1420 // expand '00:00:00:00:00:00' in name with bd_addr 1421 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1422 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1423 break; 1424 } 1425 case HCI_INIT_WRITE_EIR_DATA: { 1426 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1427 hci_reserve_packet_buffer(); 1428 uint8_t * packet = hci_stack->hci_packet_buffer; 1429 // construct HCI Command in-place and send 1430 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1431 hci_stack->last_cmd_opcode = opcode; 1432 uint16_t offset = 0; 1433 packet[offset++] = opcode & 0xff; 1434 packet[offset++] = opcode >> 8; 1435 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1436 packet[offset++] = 0; // FEC not required 1437 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1438 if (hci_stack->eir_data){ 1439 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1440 ad_context_t context; 1441 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1442 uint8_t data_type = ad_iterator_get_data_type(&context); 1443 uint8_t size = ad_iterator_get_data_len(&context); 1444 const uint8_t *data = ad_iterator_get_data(&context); 1445 // copy item 1446 packet[offset++] = size + 1; 1447 packet[offset++] = data_type; 1448 memcpy(&packet[offset], data, size); 1449 // update name item 1450 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1451 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1452 } 1453 offset += size; 1454 } 1455 } else { 1456 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1457 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1458 packet[offset++] = bytes_to_copy + 1; 1459 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1460 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1461 // expand '00:00:00:00:00:00' in name with bd_addr 1462 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1463 } 1464 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1465 break; 1466 } 1467 case HCI_INIT_WRITE_INQUIRY_MODE: 1468 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1469 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1470 break; 1471 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1472 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1473 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1474 break; 1475 case HCI_INIT_WRITE_SCAN_ENABLE: 1476 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1477 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1478 break; 1479 // only sent if ENABLE_SCO_OVER_HCI is defined 1480 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1481 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1482 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1483 break; 1484 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1485 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1486 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1487 break; 1488 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1489 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1490 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1491 log_info("BCM: Route SCO data via HCI transport"); 1492 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1493 break; 1494 1495 #endif 1496 #ifdef ENABLE_BLE 1497 // LE INIT 1498 case HCI_INIT_LE_READ_BUFFER_SIZE: 1499 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1500 hci_send_cmd(&hci_le_read_buffer_size); 1501 break; 1502 case HCI_INIT_LE_SET_EVENT_MASK: 1503 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1504 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1505 break; 1506 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1507 // LE Supported Host = 1, Simultaneous Host = 0 1508 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1509 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1510 break; 1511 #endif 1512 1513 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1514 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1515 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1516 hci_send_cmd(&hci_le_read_maximum_data_length); 1517 break; 1518 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1519 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1520 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1521 break; 1522 #endif 1523 1524 #ifdef ENABLE_LE_CENTRAL 1525 case HCI_INIT_READ_WHITE_LIST_SIZE: 1526 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1527 hci_send_cmd(&hci_le_read_white_list_size); 1528 break; 1529 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1530 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1531 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1532 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); 1533 break; 1534 #endif 1535 default: 1536 return; 1537 } 1538 } 1539 1540 static void hci_init_done(void){ 1541 // done. tell the app 1542 log_info("hci_init_done -> HCI_STATE_WORKING"); 1543 hci_stack->state = HCI_STATE_WORKING; 1544 hci_emit_state(); 1545 hci_run(); 1546 } 1547 1548 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1549 bool command_completed = false; 1550 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1551 uint16_t opcode = little_endian_read_16(packet,3); 1552 if (opcode == hci_stack->last_cmd_opcode){ 1553 command_completed = true; 1554 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1555 } else { 1556 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1557 } 1558 } 1559 1560 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1561 uint8_t status = packet[2]; 1562 uint16_t opcode = little_endian_read_16(packet,4); 1563 if (opcode == hci_stack->last_cmd_opcode){ 1564 if (status){ 1565 command_completed = true; 1566 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1567 } else { 1568 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1569 } 1570 } else { 1571 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1572 } 1573 } 1574 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1575 // Vendor == CSR 1576 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1577 // TODO: track actual command 1578 command_completed = true; 1579 } 1580 1581 // Vendor == Toshiba 1582 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1583 // TODO: track actual command 1584 command_completed = true; 1585 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1586 hci_stack->num_cmd_packets = 1; 1587 } 1588 #endif 1589 1590 return command_completed; 1591 } 1592 1593 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1594 1595 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1596 1597 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1598 1599 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1600 1601 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1602 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1603 // 1604 // HCI Reset 1605 // Timeout 100 ms 1606 // HCI Reset 1607 // Command Complete Reset 1608 // HCI Read Local Version Information 1609 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1610 // hang... 1611 // 1612 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1613 if (!command_completed 1614 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1615 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1616 1617 uint16_t opcode = little_endian_read_16(packet,3); 1618 if (opcode == hci_reset.opcode){ 1619 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1620 return; 1621 } 1622 } 1623 1624 // CSR & H5 1625 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1626 if (!command_completed 1627 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1628 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1629 1630 uint16_t opcode = little_endian_read_16(packet,3); 1631 if (opcode == hci_reset.opcode){ 1632 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1633 return; 1634 } 1635 } 1636 1637 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1638 // fix: Correct substate and behave as command below 1639 if (command_completed){ 1640 switch (hci_stack->substate){ 1641 case HCI_INIT_SEND_RESET: 1642 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1643 break; 1644 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1645 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1646 break; 1647 default: 1648 break; 1649 } 1650 } 1651 1652 #endif 1653 1654 if (!command_completed) return; 1655 1656 bool need_baud_change = false; 1657 bool need_addr_change = false; 1658 1659 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1660 need_baud_change = hci_stack->config 1661 && hci_stack->chipset 1662 && hci_stack->chipset->set_baudrate_command 1663 && hci_stack->hci_transport->set_baudrate 1664 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1665 1666 need_addr_change = hci_stack->custom_bd_addr_set 1667 && hci_stack->chipset 1668 && hci_stack->chipset->set_bd_addr_command; 1669 #endif 1670 1671 switch(hci_stack->substate){ 1672 1673 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1674 case HCI_INIT_SEND_RESET: 1675 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1676 // fix: just correct substate and behave as command below 1677 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1678 btstack_run_loop_remove_timer(&hci_stack->timeout); 1679 break; 1680 case HCI_INIT_W4_SEND_RESET: 1681 btstack_run_loop_remove_timer(&hci_stack->timeout); 1682 break; 1683 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1684 log_info("Received local name, need baud change %d", (int) need_baud_change); 1685 if (need_baud_change){ 1686 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1687 return; 1688 } 1689 // skip baud change 1690 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1691 return; 1692 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1693 // for STLC2500D, baud rate change already happened. 1694 // for others, baud rate gets changed now 1695 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1696 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1697 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1698 hci_stack->hci_transport->set_baudrate(baud_rate); 1699 } 1700 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1701 return; 1702 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1703 btstack_run_loop_remove_timer(&hci_stack->timeout); 1704 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1705 return; 1706 case HCI_INIT_W4_CUSTOM_INIT: 1707 // repeat custom init 1708 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1709 return; 1710 #else 1711 case HCI_INIT_W4_SEND_RESET: 1712 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1713 return ; 1714 #endif 1715 1716 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1717 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1718 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1719 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1720 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1721 return; 1722 } 1723 if (need_addr_change){ 1724 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1725 return; 1726 } 1727 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1728 return; 1729 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1730 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1731 if (need_baud_change){ 1732 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1733 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1734 hci_stack->hci_transport->set_baudrate(baud_rate); 1735 } 1736 if (need_addr_change){ 1737 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1738 return; 1739 } 1740 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1741 return; 1742 case HCI_INIT_W4_SET_BD_ADDR: 1743 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1744 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1745 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1746 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1747 return; 1748 } 1749 // skipping st warm boot 1750 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1751 return; 1752 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1753 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1754 return; 1755 #endif 1756 case HCI_INIT_W4_READ_BD_ADDR: 1757 // only read buffer size if supported 1758 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1759 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1760 return; 1761 } 1762 // skipping read buffer size 1763 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1764 return; 1765 case HCI_INIT_W4_SET_EVENT_MASK: 1766 // skip Classic init commands for LE only chipsets 1767 if (!hci_classic_supported()){ 1768 #ifdef ENABLE_BLE 1769 if (hci_le_supported()){ 1770 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1771 return; 1772 } 1773 #endif 1774 log_error("Neither BR/EDR nor LE supported"); 1775 hci_init_done(); 1776 return; 1777 } 1778 if (!gap_ssp_supported()){ 1779 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1780 return; 1781 } 1782 break; 1783 #ifdef ENABLE_BLE 1784 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1785 // skip write le host if not supported (e.g. on LE only EM9301) 1786 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1787 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1788 return; 1789 1790 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1791 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1792 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1793 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1794 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1795 return; 1796 } 1797 // explicit fall through to reduce repetitions 1798 1799 #ifdef ENABLE_LE_CENTRAL 1800 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1801 #else 1802 hci_init_done(); 1803 #endif 1804 return; 1805 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1806 1807 #endif /* ENABLE_BLE */ 1808 1809 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1810 // skip write secure connections host support if not supported or disabled 1811 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1812 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1813 return; 1814 } 1815 break; 1816 1817 #ifdef ENABLE_SCO_OVER_HCI 1818 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1819 // skip write synchronous flow control if not supported 1820 if (hci_stack->local_supported_commands[0] & 0x04) break; 1821 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1822 1823 /* fall through */ 1824 1825 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1826 // skip write default erroneous data reporting if not supported 1827 if (hci_stack->local_supported_commands[0] & 0x08) break; 1828 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1829 1830 /* fall through */ 1831 1832 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1833 // skip bcm set sco pcm config on non-Broadcom chipsets 1834 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1835 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1836 1837 /* fall through */ 1838 1839 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1840 if (!hci_le_supported()){ 1841 // SKIP LE init for Classic only configuration 1842 hci_init_done(); 1843 return; 1844 } 1845 break; 1846 1847 #else /* !ENABLE_SCO_OVER_HCI */ 1848 1849 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1850 #ifdef ENABLE_BLE 1851 if (hci_le_supported()){ 1852 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1853 return; 1854 } 1855 #endif 1856 // SKIP LE init for Classic only configuration 1857 hci_init_done(); 1858 return; 1859 #endif /* ENABLE_SCO_OVER_HCI */ 1860 1861 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1862 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1863 // Response to command before init done state -> init done 1864 case (HCI_INIT_DONE-1): 1865 hci_init_done(); 1866 return; 1867 #endif 1868 1869 default: 1870 break; 1871 } 1872 hci_initializing_next_state(); 1873 } 1874 1875 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1876 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1877 bd_addr_t bd_address; 1878 (void)memcpy(&bd_address, conn->address, 6); 1879 1880 #ifdef ENABLE_CLASSIC 1881 // cache needed data 1882 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1883 #endif 1884 1885 // connection failed, remove entry 1886 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1887 btstack_memory_hci_connection_free( conn ); 1888 1889 #ifdef ENABLE_CLASSIC 1890 // notify client if dedicated bonding 1891 if (notify_dedicated_bonding_failed){ 1892 log_info("hci notify_dedicated_bonding_failed"); 1893 hci_emit_dedicated_bonding_result(bd_address, status); 1894 } 1895 1896 // if authentication error, also delete link key 1897 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1898 gap_drop_link_key_for_bd_addr(bd_address); 1899 } 1900 #else 1901 UNUSED(status); 1902 #endif 1903 } 1904 1905 #ifdef ENABLE_CLASSIC 1906 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1907 // SSP Controller 1908 if (features[6] & (1 << 3)){ 1909 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1910 } 1911 // eSCO 1912 if (features[3] & (1<<7)){ 1913 conn->remote_supported_features[0] |= 1; 1914 } 1915 // Extended features 1916 if (features[7] & (1<<7)){ 1917 conn->remote_supported_features[0] |= 2; 1918 } 1919 } 1920 1921 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1922 // SSP Host 1923 if (features[0] & (1 << 0)){ 1924 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1925 } 1926 // SC Host 1927 if (features[0] & (1 << 3)){ 1928 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1929 } 1930 } 1931 1932 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1933 // SC Controller 1934 if (features[1] & (1 << 0)){ 1935 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1936 } 1937 } 1938 1939 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1940 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1941 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1942 if (conn->bonding_flags & BONDING_DEDICATED){ 1943 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1944 } 1945 } 1946 #endif 1947 1948 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1949 // handle BT initialization 1950 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1951 hci_initializing_event_handler(packet, size); 1952 } 1953 1954 // help with BT sleep 1955 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1956 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1957 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1958 hci_initializing_next_state(); 1959 } 1960 } 1961 1962 #ifdef ENABLE_CLASSIC 1963 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 1964 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1965 conn->encryption_key_size = encryption_key_size; 1966 1967 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 1968 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 1969 return; 1970 } 1971 1972 // Request Authentication if not already done 1973 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 1974 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1975 } 1976 #endif 1977 1978 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 1979 UNUSED(size); 1980 1981 uint16_t manufacturer; 1982 #ifdef ENABLE_CLASSIC 1983 hci_con_handle_t handle; 1984 hci_connection_t * conn; 1985 uint8_t status; 1986 #endif 1987 // get num cmd packets - limit to 1 to reduce complexity 1988 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1989 1990 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 1991 switch (opcode){ 1992 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 1993 if (packet[5]) break; 1994 // terminate, name 248 chars 1995 packet[6+248] = 0; 1996 log_info("local name: %s", &packet[6]); 1997 break; 1998 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 1999 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2000 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2001 uint16_t acl_len = little_endian_read_16(packet, 6); 2002 uint16_t sco_len = packet[8]; 2003 2004 // determine usable ACL/SCO payload size 2005 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2006 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2007 2008 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2009 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2010 2011 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2012 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2013 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2014 } 2015 break; 2016 case HCI_OPCODE_HCI_READ_RSSI: 2017 if (packet[5] == ERROR_CODE_SUCCESS){ 2018 uint8_t event[5]; 2019 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2020 event[1] = 3; 2021 (void)memcpy(&event[2], &packet[6], 3); 2022 hci_emit_event(event, sizeof(event), 1); 2023 } 2024 break; 2025 #ifdef ENABLE_BLE 2026 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2027 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2028 hci_stack->le_acl_packets_total_num = packet[8]; 2029 // determine usable ACL payload size 2030 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2031 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2032 } 2033 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2034 break; 2035 #endif 2036 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2037 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2038 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2039 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2040 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); 2041 break; 2042 #endif 2043 #ifdef ENABLE_LE_CENTRAL 2044 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2045 hci_stack->le_whitelist_capacity = packet[6]; 2046 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2047 break; 2048 #endif 2049 case HCI_OPCODE_HCI_READ_BD_ADDR: 2050 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2051 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)); 2052 #ifdef ENABLE_CLASSIC 2053 if (hci_stack->link_key_db){ 2054 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2055 } 2056 #endif 2057 break; 2058 #ifdef ENABLE_CLASSIC 2059 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2060 hci_emit_discoverable_enabled(hci_stack->discoverable); 2061 break; 2062 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2063 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2064 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2065 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2066 hci_emit_event(event, sizeof(event), 1); 2067 } 2068 break; 2069 #endif 2070 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2071 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2072 2073 #ifdef ENABLE_CLASSIC 2074 // determine usable ACL packet types based on host buffer size and supported features 2075 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2076 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2077 #endif 2078 // Classic/LE 2079 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2080 break; 2081 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2082 manufacturer = little_endian_read_16(packet, 10); 2083 // map Cypress to Broadcom 2084 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2085 log_info("Treat Cypress as Broadcom"); 2086 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2087 little_endian_store_16(packet, 10, manufacturer); 2088 } 2089 hci_stack->manufacturer = manufacturer; 2090 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2091 break; 2092 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2093 hci_stack->local_supported_commands[0] = 2094 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2095 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2096 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2097 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2098 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2099 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2100 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2101 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2102 hci_stack->local_supported_commands[1] = 2103 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2104 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u); // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2105 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2106 break; 2107 #ifdef ENABLE_CLASSIC 2108 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2109 if (packet[5]) return; 2110 hci_stack->synchronous_flow_control_enabled = 1; 2111 break; 2112 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2113 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2114 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2115 conn = hci_connection_for_handle(handle); 2116 if (conn != NULL) { 2117 uint8_t key_size = 0; 2118 if (status == 0){ 2119 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2120 log_info("Handle %x04x key Size: %u", handle, key_size); 2121 } else { 2122 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2123 } 2124 hci_handle_read_encryption_key_size_complete(conn, key_size); 2125 } 2126 break; 2127 #endif 2128 default: 2129 break; 2130 } 2131 } 2132 2133 static void event_handler(uint8_t *packet, uint16_t size){ 2134 2135 uint16_t event_length = packet[1]; 2136 2137 // assert packet is complete 2138 if (size != (event_length + 2u)){ 2139 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2140 return; 2141 } 2142 2143 bd_addr_t addr; 2144 bd_addr_type_t addr_type; 2145 hci_con_handle_t handle; 2146 hci_connection_t * conn; 2147 int i; 2148 int create_connection_cmd; 2149 2150 #ifdef ENABLE_CLASSIC 2151 uint8_t link_type; 2152 #endif 2153 2154 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2155 2156 switch (hci_event_packet_get_type(packet)) { 2157 2158 case HCI_EVENT_COMMAND_COMPLETE: 2159 handle_command_complete_event(packet, size); 2160 break; 2161 2162 case HCI_EVENT_COMMAND_STATUS: 2163 // get num cmd packets - limit to 1 to reduce complexity 2164 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2165 2166 // check command status to detected failed outgoing connections 2167 create_connection_cmd = 0; 2168 #ifdef ENABLE_CLASSIC 2169 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2170 create_connection_cmd = 1; 2171 } 2172 #endif 2173 #ifdef ENABLE_LE_CENTRAL 2174 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2175 create_connection_cmd = 1; 2176 } 2177 #endif 2178 if (create_connection_cmd) { 2179 uint8_t status = hci_event_command_status_get_status(packet); 2180 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2181 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); 2182 2183 // reset outgoing address info 2184 memset(hci_stack->outgoing_addr, 0, 6); 2185 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2186 2187 // error => outgoing connection failed 2188 if ((conn != NULL) && (status != 0u)){ 2189 hci_handle_connection_failed(conn, status); 2190 } 2191 } 2192 break; 2193 2194 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2195 if (size < 3) return; 2196 uint16_t num_handles = packet[2]; 2197 if (size != (3u + num_handles * 4u)) return; 2198 uint16_t offset = 3; 2199 for (i=0; i<num_handles;i++){ 2200 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2201 offset += 2u; 2202 uint16_t num_packets = little_endian_read_16(packet, offset); 2203 offset += 2u; 2204 2205 conn = hci_connection_for_handle(handle); 2206 if (!conn){ 2207 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2208 continue; 2209 } 2210 2211 if (conn->num_packets_sent >= num_packets){ 2212 conn->num_packets_sent -= num_packets; 2213 } else { 2214 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2215 conn->num_packets_sent = 0; 2216 } 2217 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2218 2219 #ifdef ENABLE_CLASSIC 2220 // For SCO, we do the can_send_now_check here 2221 hci_notify_if_sco_can_send_now(); 2222 #endif 2223 } 2224 break; 2225 } 2226 2227 #ifdef ENABLE_CLASSIC 2228 case HCI_EVENT_INQUIRY_COMPLETE: 2229 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2230 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2231 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2232 hci_emit_event(event, sizeof(event), 1); 2233 } 2234 break; 2235 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2236 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2237 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2238 } 2239 break; 2240 case HCI_EVENT_CONNECTION_REQUEST: 2241 reverse_bd_addr(&packet[2], addr); 2242 if (hci_stack->gap_classic_accept_callback != NULL){ 2243 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2244 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2245 bd_addr_copy(hci_stack->decline_addr, addr); 2246 break; 2247 } 2248 } 2249 2250 // TODO: eval COD 8-10 2251 link_type = packet[11]; 2252 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2253 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2254 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2255 if (!conn) { 2256 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2257 } 2258 if (!conn) { 2259 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2260 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2261 bd_addr_copy(hci_stack->decline_addr, addr); 2262 break; 2263 } 2264 conn->role = HCI_ROLE_SLAVE; 2265 conn->state = RECEIVED_CONNECTION_REQUEST; 2266 // store info about eSCO 2267 if (link_type == 0x02){ 2268 conn->remote_supported_features[0] |= 1; 2269 } 2270 hci_run(); 2271 break; 2272 2273 case HCI_EVENT_CONNECTION_COMPLETE: 2274 // Connection management 2275 reverse_bd_addr(&packet[5], addr); 2276 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2277 addr_type = BD_ADDR_TYPE_ACL; 2278 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2279 if (conn) { 2280 if (!packet[2]){ 2281 conn->state = OPEN; 2282 conn->con_handle = little_endian_read_16(packet, 3); 2283 2284 // queue get remote feature 2285 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2286 2287 // queue set supervision timeout if we're master 2288 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2289 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2290 } 2291 2292 // restart timer 2293 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2294 btstack_run_loop_add_timer(&conn->timeout); 2295 2296 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2297 2298 hci_emit_nr_connections_changed(); 2299 } else { 2300 // connection failed 2301 hci_handle_connection_failed(conn, packet[2]); 2302 } 2303 } 2304 break; 2305 2306 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2307 reverse_bd_addr(&packet[5], addr); 2308 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2309 if (packet[2]){ 2310 // connection failed 2311 break; 2312 } 2313 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2314 if (!conn) { 2315 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2316 } 2317 if (!conn) { 2318 break; 2319 } 2320 conn->state = OPEN; 2321 conn->con_handle = little_endian_read_16(packet, 3); 2322 2323 #ifdef ENABLE_SCO_OVER_HCI 2324 // update SCO 2325 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2326 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2327 } 2328 // trigger can send now 2329 if (hci_have_usb_transport()){ 2330 hci_stack->sco_can_send_now = 1; 2331 } 2332 #endif 2333 break; 2334 2335 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2336 handle = little_endian_read_16(packet, 3); 2337 conn = hci_connection_for_handle(handle); 2338 if (!conn) break; 2339 if (!packet[2]){ 2340 const uint8_t * features = &packet[5]; 2341 hci_handle_remote_features_page_0(conn, features); 2342 2343 // read extended features if possible 2344 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2345 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2346 break; 2347 } 2348 } 2349 hci_handle_remote_features_received(conn); 2350 break; 2351 2352 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2353 handle = little_endian_read_16(packet, 3); 2354 conn = hci_connection_for_handle(handle); 2355 if (!conn) break; 2356 // status = ok, page = 1 2357 if (!packet[2]) { 2358 uint8_t page_number = packet[5]; 2359 uint8_t maximum_page_number = packet[6]; 2360 const uint8_t * features = &packet[7]; 2361 bool done = false; 2362 switch (page_number){ 2363 case 1: 2364 hci_handle_remote_features_page_1(conn, features); 2365 if (maximum_page_number >= 2){ 2366 // get Secure Connections (Controller) from Page 2 if available 2367 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2368 } else { 2369 // otherwise, assume SC (Controller) == SC (Host) 2370 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2371 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2372 } 2373 done = true; 2374 } 2375 break; 2376 case 2: 2377 hci_handle_remote_features_page_2(conn, features); 2378 done = true; 2379 break; 2380 default: 2381 break; 2382 } 2383 if (!done) break; 2384 } 2385 hci_handle_remote_features_received(conn); 2386 break; 2387 2388 case HCI_EVENT_LINK_KEY_REQUEST: 2389 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2390 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2391 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2392 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2393 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2394 hci_run(); 2395 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2396 return; 2397 2398 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2399 reverse_bd_addr(&packet[2], addr); 2400 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2401 if (!conn) break; 2402 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2403 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2404 // Change Connection Encryption keeps link key type 2405 if (link_key_type != CHANGED_COMBINATION_KEY){ 2406 conn->link_key_type = link_key_type; 2407 } 2408 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2409 // still forward event to allow dismiss of pairing dialog 2410 break; 2411 } 2412 2413 case HCI_EVENT_PIN_CODE_REQUEST: 2414 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2415 // non-bondable mode: pin code negative reply will be sent 2416 if (!hci_stack->bondable){ 2417 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2418 hci_run(); 2419 return; 2420 } 2421 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2422 if (!hci_stack->link_key_db) break; 2423 hci_event_pin_code_request_get_bd_addr(packet, addr); 2424 hci_stack->link_key_db->delete_link_key(addr); 2425 break; 2426 2427 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2428 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2429 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2430 break; 2431 2432 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2433 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2434 if (!hci_stack->ssp_auto_accept) break; 2435 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2436 break; 2437 2438 case HCI_EVENT_USER_PASSKEY_REQUEST: 2439 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2440 if (!hci_stack->ssp_auto_accept) break; 2441 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2442 break; 2443 case HCI_EVENT_MODE_CHANGE: 2444 handle = hci_event_mode_change_get_handle(packet); 2445 conn = hci_connection_for_handle(handle); 2446 if (!conn) break; 2447 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2448 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2449 break; 2450 #endif 2451 2452 case HCI_EVENT_ENCRYPTION_CHANGE: 2453 handle = hci_event_encryption_change_get_connection_handle(packet); 2454 conn = hci_connection_for_handle(handle); 2455 if (!conn) break; 2456 if (hci_event_encryption_change_get_status(packet) == 0u) { 2457 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2458 if (encryption_enabled){ 2459 if (hci_is_le_connection(conn)){ 2460 // For LE, we accept connection as encrypted 2461 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2462 } 2463 #ifdef ENABLE_CLASSIC 2464 else { 2465 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2466 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2467 bool connected_uses_aes_ccm = encryption_enabled == 2; 2468 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2469 log_info("SC during pairing, but only E0 now -> abort"); 2470 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2471 break; 2472 } 2473 2474 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2475 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2476 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2477 } else { 2478 // if not, pretend everything is perfect 2479 hci_handle_read_encryption_key_size_complete(conn, 16); 2480 } 2481 } 2482 #endif 2483 } else { 2484 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2485 } 2486 } 2487 2488 break; 2489 2490 #ifdef ENABLE_CLASSIC 2491 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2492 handle = hci_event_authentication_complete_get_connection_handle(packet); 2493 conn = hci_connection_for_handle(handle); 2494 if (!conn) break; 2495 2496 // ignore authentication event if we didn't request it 2497 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2498 2499 // dedicated bonding: send result and disconnect 2500 if (conn->bonding_flags & BONDING_DEDICATED){ 2501 conn->bonding_flags &= ~BONDING_DEDICATED; 2502 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2503 conn->bonding_status = packet[2]; 2504 break; 2505 } 2506 2507 // authenticated only if auth status == 0 2508 if (hci_event_authentication_complete_get_status(packet) == 0){ 2509 // authenticated 2510 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2511 2512 // If link key sufficient for requested security and not already encrypted, start encryption 2513 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2514 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2515 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2516 break; 2517 } 2518 } 2519 2520 // emit updated security level 2521 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2522 break; 2523 #endif 2524 2525 // HCI_EVENT_DISCONNECTION_COMPLETE 2526 // has been split, to first notify stack before shutting connection down 2527 // see end of function, too. 2528 case HCI_EVENT_DISCONNECTION_COMPLETE: 2529 if (packet[2]) break; // status != 0 2530 handle = little_endian_read_16(packet, 3); 2531 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2532 if (hci_stack->acl_fragmentation_total_size > 0u) { 2533 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2534 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2535 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2536 hci_stack->acl_fragmentation_total_size = 0; 2537 hci_stack->acl_fragmentation_pos = 0; 2538 if (release_buffer){ 2539 hci_release_packet_buffer(); 2540 } 2541 } 2542 } 2543 2544 conn = hci_connection_for_handle(handle); 2545 if (!conn) break; 2546 // mark connection for shutdown 2547 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2548 2549 // emit dedicatd bonding event 2550 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2551 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2552 } 2553 2554 #ifdef ENABLE_BLE 2555 #ifdef ENABLE_LE_PERIPHERAL 2556 // re-enable advertisements for le connections if active 2557 if (hci_is_le_connection(conn)){ 2558 hci_reenable_advertisements_if_needed(); 2559 } 2560 #endif 2561 #endif 2562 break; 2563 2564 case HCI_EVENT_HARDWARE_ERROR: 2565 log_error("Hardware Error: 0x%02x", packet[2]); 2566 if (hci_stack->hardware_error_callback){ 2567 (*hci_stack->hardware_error_callback)(packet[2]); 2568 } else { 2569 // if no special requests, just reboot stack 2570 hci_power_control_off(); 2571 hci_power_control_on(); 2572 } 2573 break; 2574 2575 #ifdef ENABLE_CLASSIC 2576 case HCI_EVENT_ROLE_CHANGE: 2577 if (packet[2]) break; // status != 0 2578 reverse_bd_addr(&packet[3], addr); 2579 addr_type = BD_ADDR_TYPE_ACL; 2580 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2581 if (!conn) break; 2582 conn->role = packet[9]; 2583 break; 2584 #endif 2585 2586 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2587 // release packet buffer only for asynchronous transport and if there are not further fragements 2588 if (hci_transport_synchronous()) { 2589 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2590 return; // instead of break: to avoid re-entering hci_run() 2591 } 2592 hci_stack->acl_fragmentation_tx_active = 0; 2593 if (hci_stack->acl_fragmentation_total_size) break; 2594 hci_release_packet_buffer(); 2595 2596 // L2CAP receives this event via the hci_emit_event below 2597 2598 #ifdef ENABLE_CLASSIC 2599 // For SCO, we do the can_send_now_check here 2600 hci_notify_if_sco_can_send_now(); 2601 #endif 2602 break; 2603 2604 #ifdef ENABLE_CLASSIC 2605 case HCI_EVENT_SCO_CAN_SEND_NOW: 2606 // For SCO, we do the can_send_now_check here 2607 hci_stack->sco_can_send_now = 1; 2608 hci_notify_if_sco_can_send_now(); 2609 return; 2610 2611 // explode inquriy results for easier consumption 2612 case HCI_EVENT_INQUIRY_RESULT: 2613 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2614 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2615 gap_inquiry_explode(packet, size); 2616 break; 2617 #endif 2618 2619 #ifdef ENABLE_BLE 2620 case HCI_EVENT_LE_META: 2621 switch (packet[2]){ 2622 #ifdef ENABLE_LE_CENTRAL 2623 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2624 // log_info("advertising report received"); 2625 if (!hci_stack->le_scanning_enabled) break; 2626 le_handle_advertisement_report(packet, size); 2627 break; 2628 #endif 2629 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2630 // Connection management 2631 reverse_bd_addr(&packet[8], addr); 2632 addr_type = (bd_addr_type_t)packet[7]; 2633 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2634 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2635 2636 #ifdef ENABLE_LE_CENTRAL 2637 // if auto-connect, remove from whitelist in both roles 2638 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2639 hci_remove_from_whitelist(addr_type, addr); 2640 } 2641 // handle error: error is reported only to the initiator -> outgoing connection 2642 if (packet[3]){ 2643 2644 // handle cancelled outgoing connection 2645 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2646 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2647 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2648 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2649 conn = gap_get_outgoing_connection(); 2650 } 2651 2652 // outgoing connection establishment is done 2653 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2654 // remove entry 2655 if (conn){ 2656 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2657 btstack_memory_hci_connection_free( conn ); 2658 } 2659 break; 2660 } 2661 #endif 2662 // on success, both hosts receive connection complete event 2663 if (packet[6] == HCI_ROLE_MASTER){ 2664 #ifdef ENABLE_LE_CENTRAL 2665 // if we're master, it was an outgoing connection and we're done with it 2666 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2667 #endif 2668 } else { 2669 #ifdef ENABLE_LE_PERIPHERAL 2670 // if we're slave, it was an incoming connection, advertisements have stopped 2671 hci_stack->le_advertisements_active = 0; 2672 #endif 2673 } 2674 // LE connections are auto-accepted, so just create a connection if there isn't one already 2675 if (!conn){ 2676 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2677 } 2678 // no memory, sorry. 2679 if (!conn){ 2680 break; 2681 } 2682 2683 conn->state = OPEN; 2684 conn->role = packet[6]; 2685 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2686 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2687 2688 #ifdef ENABLE_LE_PERIPHERAL 2689 if (packet[6] == HCI_ROLE_SLAVE){ 2690 hci_reenable_advertisements_if_needed(); 2691 } 2692 #endif 2693 2694 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2695 2696 // restart timer 2697 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2698 // btstack_run_loop_add_timer(&conn->timeout); 2699 2700 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2701 2702 hci_emit_nr_connections_changed(); 2703 break; 2704 2705 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2706 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2707 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2708 conn = hci_connection_for_handle(handle); 2709 if (!conn) break; 2710 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2711 break; 2712 2713 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2714 // connection 2715 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2716 conn = hci_connection_for_handle(handle); 2717 if (conn) { 2718 // read arguments 2719 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2720 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2721 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2722 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2723 2724 // validate against current connection parameter range 2725 le_connection_parameter_range_t existing_range; 2726 gap_get_connection_parameter_range(&existing_range); 2727 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2728 if (update_parameter){ 2729 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2730 conn->le_conn_interval_min = le_conn_interval_min; 2731 conn->le_conn_interval_max = le_conn_interval_max; 2732 conn->le_conn_latency = le_conn_latency; 2733 conn->le_supervision_timeout = le_supervision_timeout; 2734 } else { 2735 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2736 } 2737 } 2738 break; 2739 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2740 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2741 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2742 conn = hci_connection_for_handle(handle); 2743 if (conn) { 2744 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2745 } 2746 break; 2747 #endif 2748 default: 2749 break; 2750 } 2751 break; 2752 #endif 2753 case HCI_EVENT_VENDOR_SPECIFIC: 2754 // Vendor specific commands often create vendor specific event instead of num completed packets 2755 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2756 switch (hci_stack->manufacturer){ 2757 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2758 hci_stack->num_cmd_packets = 1; 2759 break; 2760 default: 2761 break; 2762 } 2763 break; 2764 default: 2765 break; 2766 } 2767 2768 handle_event_for_current_stack_state(packet, size); 2769 2770 // notify upper stack 2771 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2772 2773 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2774 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2775 if (!packet[2]){ 2776 handle = little_endian_read_16(packet, 3); 2777 hci_connection_t * aConn = hci_connection_for_handle(handle); 2778 if (aConn) { 2779 // discard connection if app did not trigger a reconnect in the event handler 2780 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2781 hci_shutdown_connection(aConn); 2782 } 2783 } 2784 } 2785 } 2786 2787 // execute main loop 2788 hci_run(); 2789 } 2790 2791 #ifdef ENABLE_CLASSIC 2792 2793 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2794 static void sco_schedule_tx(hci_connection_t * conn); 2795 2796 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2797 log_debug("SCO TX Timeout"); 2798 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2799 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2800 if (!conn) return; 2801 2802 // trigger send 2803 conn->sco_tx_ready = 1; 2804 // extra packet if CVSD but SCO buffer is too short 2805 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2806 conn->sco_tx_ready++; 2807 } 2808 hci_notify_if_sco_can_send_now(); 2809 } 2810 2811 2812 #define SCO_TX_AFTER_RX_MS (6) 2813 2814 static void sco_schedule_tx(hci_connection_t * conn){ 2815 2816 uint32_t now = btstack_run_loop_get_time_ms(); 2817 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2818 int time_delta_ms = sco_tx_ms - now; 2819 2820 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2821 2822 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2823 btstack_run_loop_set_timer(timer, time_delta_ms); 2824 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2825 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2826 btstack_run_loop_add_timer(timer); 2827 } 2828 2829 static void sco_handler(uint8_t * packet, uint16_t size){ 2830 // lookup connection struct 2831 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2832 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2833 if (!conn) return; 2834 2835 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2836 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2837 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2838 packet[2] = 0x3c; 2839 memmove(&packet[3], &packet[23], 63); 2840 size = 63; 2841 } 2842 } 2843 2844 if (hci_have_usb_transport()){ 2845 // Nothing to do 2846 } else { 2847 // 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); 2848 if (hci_stack->synchronous_flow_control_enabled == 0){ 2849 uint32_t now = btstack_run_loop_get_time_ms(); 2850 2851 if (!conn->sco_rx_valid){ 2852 // ignore first 10 packets 2853 conn->sco_rx_count++; 2854 // log_debug("sco rx count %u", conn->sco_rx_count); 2855 if (conn->sco_rx_count == 10) { 2856 // use first timestamp as is and pretent it just started 2857 conn->sco_rx_ms = now; 2858 conn->sco_rx_valid = 1; 2859 conn->sco_rx_count = 0; 2860 sco_schedule_tx(conn); 2861 } 2862 } else { 2863 // track expected arrival timme 2864 conn->sco_rx_count++; 2865 conn->sco_rx_ms += 7; 2866 int delta = (int32_t) (now - conn->sco_rx_ms); 2867 if (delta > 0){ 2868 conn->sco_rx_ms++; 2869 } 2870 // log_debug("sco rx %u", conn->sco_rx_ms); 2871 sco_schedule_tx(conn); 2872 } 2873 } 2874 } 2875 // deliver to app 2876 if (hci_stack->sco_packet_handler) { 2877 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2878 } 2879 2880 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2881 conn->num_packets_completed++; 2882 hci_stack->host_completed_packets = 1; 2883 hci_run(); 2884 #endif 2885 } 2886 #endif 2887 2888 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2889 hci_dump_packet(packet_type, 1, packet, size); 2890 switch (packet_type) { 2891 case HCI_EVENT_PACKET: 2892 event_handler(packet, size); 2893 break; 2894 case HCI_ACL_DATA_PACKET: 2895 acl_handler(packet, size); 2896 break; 2897 #ifdef ENABLE_CLASSIC 2898 case HCI_SCO_DATA_PACKET: 2899 sco_handler(packet, size); 2900 break; 2901 #endif 2902 default: 2903 break; 2904 } 2905 } 2906 2907 /** 2908 * @brief Add event packet handler. 2909 */ 2910 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2911 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2912 } 2913 2914 2915 /** Register HCI packet handlers */ 2916 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2917 hci_stack->acl_packet_handler = handler; 2918 } 2919 2920 #ifdef ENABLE_CLASSIC 2921 /** 2922 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2923 */ 2924 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2925 hci_stack->sco_packet_handler = handler; 2926 } 2927 #endif 2928 2929 static void hci_state_reset(void){ 2930 // no connections yet 2931 hci_stack->connections = NULL; 2932 2933 // keep discoverable/connectable as this has been requested by the client(s) 2934 // hci_stack->discoverable = 0; 2935 // hci_stack->connectable = 0; 2936 // hci_stack->bondable = 1; 2937 // hci_stack->own_addr_type = 0; 2938 2939 // buffer is free 2940 hci_stack->hci_packet_buffer_reserved = 0; 2941 2942 // no pending cmds 2943 hci_stack->decline_reason = 0; 2944 hci_stack->new_scan_enable_value = 0xff; 2945 2946 // LE 2947 #ifdef ENABLE_BLE 2948 memset(hci_stack->le_random_address, 0, 6); 2949 hci_stack->le_random_address_set = 0; 2950 #endif 2951 #ifdef ENABLE_LE_CENTRAL 2952 hci_stack->le_scanning_active = 0; 2953 hci_stack->le_scan_type = 0xff; 2954 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2955 hci_stack->le_whitelist = 0; 2956 hci_stack->le_whitelist_capacity = 0; 2957 #endif 2958 } 2959 2960 #ifdef ENABLE_CLASSIC 2961 /** 2962 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2963 */ 2964 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2965 // store and open remote device db 2966 hci_stack->link_key_db = link_key_db; 2967 if (hci_stack->link_key_db) { 2968 hci_stack->link_key_db->open(); 2969 } 2970 } 2971 #endif 2972 2973 void hci_init(const hci_transport_t *transport, const void *config){ 2974 2975 #ifdef HAVE_MALLOC 2976 if (!hci_stack) { 2977 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2978 } 2979 #else 2980 hci_stack = &hci_stack_static; 2981 #endif 2982 memset(hci_stack, 0, sizeof(hci_stack_t)); 2983 2984 // reference to use transport layer implementation 2985 hci_stack->hci_transport = transport; 2986 2987 // reference to used config 2988 hci_stack->config = config; 2989 2990 // setup pointer for outgoing packet buffer 2991 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2992 2993 // max acl payload size defined in config.h 2994 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2995 2996 // register packet handlers with transport 2997 transport->register_packet_handler(&packet_handler); 2998 2999 hci_stack->state = HCI_STATE_OFF; 3000 3001 // class of device 3002 hci_stack->class_of_device = 0x007a020c; // Smartphone 3003 3004 // bondable by default 3005 hci_stack->bondable = 1; 3006 3007 #ifdef ENABLE_CLASSIC 3008 // classic name 3009 hci_stack->local_name = default_classic_name; 3010 3011 // Master slave policy 3012 hci_stack->master_slave_policy = 1; 3013 3014 // Allow Role Switch 3015 hci_stack->allow_role_switch = 1; 3016 3017 // Default / minimum security level = 2 3018 hci_stack->gap_security_level = LEVEL_2; 3019 3020 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3021 hci_stack->gap_required_encyrption_key_size = 7; 3022 #endif 3023 3024 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3025 hci_stack->ssp_enable = 1; 3026 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3027 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3028 hci_stack->ssp_auto_accept = 1; 3029 3030 // Secure Connections: enable (requires support from Controller) 3031 hci_stack->secure_connections_enable = true; 3032 3033 // voice setting - signed 16 bit pcm data with CVSD over the air 3034 hci_stack->sco_voice_setting = 0x60; 3035 3036 #ifdef ENABLE_LE_CENTRAL 3037 // connection parameter to use for outgoing connections 3038 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3039 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3040 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3041 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3042 hci_stack->le_connection_latency = 4; // 4 3043 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3044 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3045 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3046 3047 // default LE Scanning 3048 hci_stack->le_scan_interval = 0x1e0; 3049 hci_stack->le_scan_window = 0x30; 3050 #endif 3051 3052 #ifdef ENABLE_LE_PERIPHERAL 3053 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3054 #endif 3055 3056 // connection parameter range used to answer connection parameter update requests in l2cap 3057 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3058 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3059 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3060 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3061 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3062 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3063 3064 hci_state_reset(); 3065 } 3066 3067 /** 3068 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3069 */ 3070 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3071 hci_stack->chipset = chipset_driver; 3072 3073 // reset chipset driver - init is also called on power_up 3074 if (hci_stack->chipset && hci_stack->chipset->init){ 3075 hci_stack->chipset->init(hci_stack->config); 3076 } 3077 } 3078 3079 /** 3080 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3081 */ 3082 void hci_set_control(const btstack_control_t *hardware_control){ 3083 // references to used control implementation 3084 hci_stack->control = hardware_control; 3085 // init with transport config 3086 hardware_control->init(hci_stack->config); 3087 } 3088 3089 void hci_close(void){ 3090 // close remote device db 3091 if (hci_stack->link_key_db) { 3092 hci_stack->link_key_db->close(); 3093 } 3094 3095 btstack_linked_list_iterator_t lit; 3096 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3097 while (btstack_linked_list_iterator_has_next(&lit)){ 3098 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3099 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3100 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3101 hci_shutdown_connection(connection); 3102 } 3103 3104 hci_power_control(HCI_POWER_OFF); 3105 3106 #ifdef HAVE_MALLOC 3107 free(hci_stack); 3108 #endif 3109 hci_stack = NULL; 3110 } 3111 3112 #ifdef ENABLE_CLASSIC 3113 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3114 // validate ranage and set 3115 if (encryption_key_size < 7) return; 3116 if (encryption_key_size > 16) return; 3117 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3118 } 3119 3120 void gap_set_security_level(gap_security_level_t security_level){ 3121 hci_stack->gap_security_level = security_level; 3122 } 3123 3124 gap_security_level_t gap_get_security_level(void){ 3125 return hci_stack->gap_security_level; 3126 } 3127 #endif 3128 3129 #ifdef ENABLE_CLASSIC 3130 void gap_set_class_of_device(uint32_t class_of_device){ 3131 hci_stack->class_of_device = class_of_device; 3132 } 3133 3134 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3135 hci_stack->default_link_policy_settings = default_link_policy_settings; 3136 } 3137 3138 void gap_set_allow_role_switch(bool allow_role_switch){ 3139 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3140 } 3141 3142 uint8_t hci_get_allow_role_switch(void){ 3143 return hci_stack->allow_role_switch; 3144 } 3145 3146 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3147 hci_stack->link_supervision_timeout = link_supervision_timeout; 3148 } 3149 3150 void hci_disable_l2cap_timeout_check(void){ 3151 disable_l2cap_timeouts = 1; 3152 } 3153 #endif 3154 3155 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3156 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3157 void hci_set_bd_addr(bd_addr_t addr){ 3158 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3159 hci_stack->custom_bd_addr_set = 1; 3160 } 3161 #endif 3162 3163 // State-Module-Driver overview 3164 // state module low-level 3165 // HCI_STATE_OFF off close 3166 // HCI_STATE_INITIALIZING, on open 3167 // HCI_STATE_WORKING, on open 3168 // HCI_STATE_HALTING, on open 3169 // HCI_STATE_SLEEPING, off/sleep close 3170 // HCI_STATE_FALLING_ASLEEP on open 3171 3172 static int hci_power_control_on(void){ 3173 3174 // power on 3175 int err = 0; 3176 if (hci_stack->control && hci_stack->control->on){ 3177 err = (*hci_stack->control->on)(); 3178 } 3179 if (err){ 3180 log_error( "POWER_ON failed"); 3181 hci_emit_hci_open_failed(); 3182 return err; 3183 } 3184 3185 // int chipset driver 3186 if (hci_stack->chipset && hci_stack->chipset->init){ 3187 hci_stack->chipset->init(hci_stack->config); 3188 } 3189 3190 // init transport 3191 if (hci_stack->hci_transport->init){ 3192 hci_stack->hci_transport->init(hci_stack->config); 3193 } 3194 3195 // open transport 3196 err = hci_stack->hci_transport->open(); 3197 if (err){ 3198 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3199 if (hci_stack->control && hci_stack->control->off){ 3200 (*hci_stack->control->off)(); 3201 } 3202 hci_emit_hci_open_failed(); 3203 return err; 3204 } 3205 return 0; 3206 } 3207 3208 static void hci_power_control_off(void){ 3209 3210 log_info("hci_power_control_off"); 3211 3212 // close low-level device 3213 hci_stack->hci_transport->close(); 3214 3215 log_info("hci_power_control_off - hci_transport closed"); 3216 3217 // power off 3218 if (hci_stack->control && hci_stack->control->off){ 3219 (*hci_stack->control->off)(); 3220 } 3221 3222 log_info("hci_power_control_off - control closed"); 3223 3224 hci_stack->state = HCI_STATE_OFF; 3225 } 3226 3227 static void hci_power_control_sleep(void){ 3228 3229 log_info("hci_power_control_sleep"); 3230 3231 #if 0 3232 // don't close serial port during sleep 3233 3234 // close low-level device 3235 hci_stack->hci_transport->close(hci_stack->config); 3236 #endif 3237 3238 // sleep mode 3239 if (hci_stack->control && hci_stack->control->sleep){ 3240 (*hci_stack->control->sleep)(); 3241 } 3242 3243 hci_stack->state = HCI_STATE_SLEEPING; 3244 } 3245 3246 static int hci_power_control_wake(void){ 3247 3248 log_info("hci_power_control_wake"); 3249 3250 // wake on 3251 if (hci_stack->control && hci_stack->control->wake){ 3252 (*hci_stack->control->wake)(); 3253 } 3254 3255 #if 0 3256 // open low-level device 3257 int err = hci_stack->hci_transport->open(hci_stack->config); 3258 if (err){ 3259 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3260 if (hci_stack->control && hci_stack->control->off){ 3261 (*hci_stack->control->off)(); 3262 } 3263 hci_emit_hci_open_failed(); 3264 return err; 3265 } 3266 #endif 3267 3268 return 0; 3269 } 3270 3271 static void hci_power_transition_to_initializing(void){ 3272 // set up state machine 3273 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3274 hci_stack->hci_packet_buffer_reserved = 0; 3275 hci_stack->state = HCI_STATE_INITIALIZING; 3276 hci_stack->substate = HCI_INIT_SEND_RESET; 3277 } 3278 3279 int hci_power_control(HCI_POWER_MODE power_mode){ 3280 3281 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3282 3283 int err = 0; 3284 switch (hci_stack->state){ 3285 3286 case HCI_STATE_OFF: 3287 switch (power_mode){ 3288 case HCI_POWER_ON: 3289 err = hci_power_control_on(); 3290 if (err) { 3291 log_error("hci_power_control_on() error %d", err); 3292 return err; 3293 } 3294 hci_power_transition_to_initializing(); 3295 break; 3296 case HCI_POWER_OFF: 3297 // do nothing 3298 break; 3299 case HCI_POWER_SLEEP: 3300 // do nothing (with SLEEP == OFF) 3301 break; 3302 } 3303 break; 3304 3305 case HCI_STATE_INITIALIZING: 3306 switch (power_mode){ 3307 case HCI_POWER_ON: 3308 // do nothing 3309 break; 3310 case HCI_POWER_OFF: 3311 // no connections yet, just turn it off 3312 hci_power_control_off(); 3313 break; 3314 case HCI_POWER_SLEEP: 3315 // no connections yet, just turn it off 3316 hci_power_control_sleep(); 3317 break; 3318 } 3319 break; 3320 3321 case HCI_STATE_WORKING: 3322 switch (power_mode){ 3323 case HCI_POWER_ON: 3324 // do nothing 3325 break; 3326 case HCI_POWER_OFF: 3327 // see hci_run 3328 hci_stack->state = HCI_STATE_HALTING; 3329 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3330 break; 3331 case HCI_POWER_SLEEP: 3332 // see hci_run 3333 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3334 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3335 break; 3336 } 3337 break; 3338 3339 case HCI_STATE_HALTING: 3340 switch (power_mode){ 3341 case HCI_POWER_ON: 3342 hci_power_transition_to_initializing(); 3343 break; 3344 case HCI_POWER_OFF: 3345 // do nothing 3346 break; 3347 case HCI_POWER_SLEEP: 3348 // see hci_run 3349 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3350 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3351 break; 3352 } 3353 break; 3354 3355 case HCI_STATE_FALLING_ASLEEP: 3356 switch (power_mode){ 3357 case HCI_POWER_ON: 3358 3359 #ifdef HAVE_PLATFORM_IPHONE_OS 3360 // nothing to do, if H4 supports power management 3361 if (btstack_control_iphone_power_management_enabled()){ 3362 hci_stack->state = HCI_STATE_INITIALIZING; 3363 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3364 break; 3365 } 3366 #endif 3367 hci_power_transition_to_initializing(); 3368 break; 3369 case HCI_POWER_OFF: 3370 // see hci_run 3371 hci_stack->state = HCI_STATE_HALTING; 3372 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3373 break; 3374 case HCI_POWER_SLEEP: 3375 // do nothing 3376 break; 3377 } 3378 break; 3379 3380 case HCI_STATE_SLEEPING: 3381 switch (power_mode){ 3382 case HCI_POWER_ON: 3383 3384 #ifdef HAVE_PLATFORM_IPHONE_OS 3385 // nothing to do, if H4 supports power management 3386 if (btstack_control_iphone_power_management_enabled()){ 3387 hci_stack->state = HCI_STATE_INITIALIZING; 3388 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3389 hci_update_scan_enable(); 3390 break; 3391 } 3392 #endif 3393 err = hci_power_control_wake(); 3394 if (err) return err; 3395 hci_power_transition_to_initializing(); 3396 break; 3397 case HCI_POWER_OFF: 3398 hci_stack->state = HCI_STATE_HALTING; 3399 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3400 break; 3401 case HCI_POWER_SLEEP: 3402 // do nothing 3403 break; 3404 } 3405 break; 3406 } 3407 3408 // create internal event 3409 hci_emit_state(); 3410 3411 // trigger next/first action 3412 hci_run(); 3413 3414 return 0; 3415 } 3416 3417 3418 #ifdef ENABLE_CLASSIC 3419 3420 static void hci_update_scan_enable(void){ 3421 // 2 = page scan, 1 = inq scan 3422 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3423 hci_run(); 3424 } 3425 3426 void gap_discoverable_control(uint8_t enable){ 3427 if (enable) enable = 1; // normalize argument 3428 3429 if (hci_stack->discoverable == enable){ 3430 hci_emit_discoverable_enabled(hci_stack->discoverable); 3431 return; 3432 } 3433 3434 hci_stack->discoverable = enable; 3435 hci_update_scan_enable(); 3436 } 3437 3438 void gap_connectable_control(uint8_t enable){ 3439 if (enable) enable = 1; // normalize argument 3440 3441 // don't emit event 3442 if (hci_stack->connectable == enable) return; 3443 3444 hci_stack->connectable = enable; 3445 hci_update_scan_enable(); 3446 } 3447 #endif 3448 3449 void gap_local_bd_addr(bd_addr_t address_buffer){ 3450 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3451 } 3452 3453 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3454 static void hci_host_num_completed_packets(void){ 3455 3456 // create packet manually as arrays are not supported and num_commands should not get reduced 3457 hci_reserve_packet_buffer(); 3458 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3459 3460 uint16_t size = 0; 3461 uint16_t num_handles = 0; 3462 packet[size++] = 0x35; 3463 packet[size++] = 0x0c; 3464 size++; // skip param len 3465 size++; // skip num handles 3466 3467 // add { handle, packets } entries 3468 btstack_linked_item_t * it; 3469 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3470 hci_connection_t * connection = (hci_connection_t *) it; 3471 if (connection->num_packets_completed){ 3472 little_endian_store_16(packet, size, connection->con_handle); 3473 size += 2; 3474 little_endian_store_16(packet, size, connection->num_packets_completed); 3475 size += 2; 3476 // 3477 num_handles++; 3478 connection->num_packets_completed = 0; 3479 } 3480 } 3481 3482 packet[2] = size - 3; 3483 packet[3] = num_handles; 3484 3485 hci_stack->host_completed_packets = 0; 3486 3487 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3488 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3489 3490 // release packet buffer for synchronous transport implementations 3491 if (hci_transport_synchronous()){ 3492 hci_release_packet_buffer(); 3493 hci_emit_transport_packet_sent(); 3494 } 3495 } 3496 #endif 3497 3498 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3499 UNUSED(ds); 3500 hci_stack->substate = HCI_HALTING_CLOSE; 3501 // allow packet handlers to defer final shutdown 3502 hci_emit_state(); 3503 hci_run(); 3504 } 3505 3506 static bool hci_run_acl_fragments(void){ 3507 if (hci_stack->acl_fragmentation_total_size > 0u) { 3508 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3509 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3510 if (connection) { 3511 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3512 hci_send_acl_packet_fragments(connection); 3513 return true; 3514 } 3515 } else { 3516 // connection gone -> discard further fragments 3517 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3518 hci_stack->acl_fragmentation_total_size = 0; 3519 hci_stack->acl_fragmentation_pos = 0; 3520 } 3521 } 3522 return false; 3523 } 3524 3525 #ifdef ENABLE_CLASSIC 3526 static bool hci_run_general_gap_classic(void){ 3527 3528 // decline incoming connections 3529 if (hci_stack->decline_reason){ 3530 uint8_t reason = hci_stack->decline_reason; 3531 hci_stack->decline_reason = 0; 3532 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3533 return true; 3534 } 3535 // send scan enable 3536 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3537 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3538 hci_stack->new_scan_enable_value = 0xff; 3539 return true; 3540 } 3541 // start/stop inquiry 3542 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3543 uint8_t duration = hci_stack->inquiry_state; 3544 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3545 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3546 return true; 3547 } 3548 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3549 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3550 hci_send_cmd(&hci_inquiry_cancel); 3551 return true; 3552 } 3553 // remote name request 3554 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3555 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3556 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3557 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3558 return true; 3559 } 3560 // pairing 3561 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3562 uint8_t state = hci_stack->gap_pairing_state; 3563 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3564 switch (state){ 3565 case GAP_PAIRING_STATE_SEND_PIN: 3566 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); 3567 break; 3568 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3569 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3570 break; 3571 case GAP_PAIRING_STATE_SEND_PASSKEY: 3572 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3573 break; 3574 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3575 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3576 break; 3577 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3578 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3579 break; 3580 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3581 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3582 break; 3583 default: 3584 break; 3585 } 3586 return true; 3587 } 3588 return false; 3589 } 3590 #endif 3591 3592 #ifdef ENABLE_BLE 3593 static bool hci_run_general_gap_le(void){ 3594 3595 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3596 3597 if (hci_stack->state != HCI_STATE_WORKING) return false; 3598 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3599 3600 #ifdef ENABLE_LE_CENTRAL 3601 // parameter change requires scanning to be stopped first 3602 if (hci_stack->le_scan_type != 0xffu) { 3603 if (hci_stack->le_scanning_active){ 3604 hci_stack->le_scanning_active = 0; 3605 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3606 } else { 3607 int scan_type = (int) hci_stack->le_scan_type; 3608 hci_stack->le_scan_type = 0xff; 3609 hci_send_cmd(&hci_le_set_scan_parameters, scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, 0); 3610 } 3611 return true; 3612 } 3613 // finally, we can enable/disable le scan 3614 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3615 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3616 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3617 return true; 3618 } 3619 #endif 3620 #ifdef ENABLE_LE_PERIPHERAL 3621 // le advertisement control 3622 if (hci_stack->le_advertisements_todo){ 3623 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3624 } 3625 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3626 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3627 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3628 return true; 3629 } 3630 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3631 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3632 hci_send_cmd(&hci_le_set_advertising_parameters, 3633 hci_stack->le_advertisements_interval_min, 3634 hci_stack->le_advertisements_interval_max, 3635 hci_stack->le_advertisements_type, 3636 hci_stack->le_own_addr_type, 3637 hci_stack->le_advertisements_direct_address_type, 3638 hci_stack->le_advertisements_direct_address, 3639 hci_stack->le_advertisements_channel_map, 3640 hci_stack->le_advertisements_filter_policy); 3641 return true; 3642 } 3643 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3644 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3645 uint8_t adv_data_clean[31]; 3646 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3647 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3648 hci_stack->le_advertisements_data_len); 3649 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3650 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3651 return true; 3652 } 3653 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3654 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3655 uint8_t scan_data_clean[31]; 3656 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3657 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3658 hci_stack->le_scan_response_data_len); 3659 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3660 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3661 return true; 3662 } 3663 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3664 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3665 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3666 return true; 3667 } 3668 #endif 3669 3670 #ifdef ENABLE_LE_CENTRAL 3671 // 3672 // LE Whitelist Management 3673 // 3674 3675 // check if whitelist needs modification 3676 btstack_linked_list_iterator_t lit; 3677 int modification_pending = 0; 3678 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3679 while (btstack_linked_list_iterator_has_next(&lit)){ 3680 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3681 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3682 modification_pending = 1; 3683 break; 3684 } 3685 } 3686 3687 if (modification_pending){ 3688 // stop connnecting if modification pending 3689 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3690 hci_send_cmd(&hci_le_create_connection_cancel); 3691 return true; 3692 } 3693 3694 // add/remove entries 3695 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3696 while (btstack_linked_list_iterator_has_next(&lit)){ 3697 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3698 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3699 entry->state = LE_WHITELIST_ON_CONTROLLER; 3700 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3701 return true; 3702 } 3703 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3704 bd_addr_t address; 3705 bd_addr_type_t address_type = entry->address_type; 3706 (void)memcpy(address, entry->address, 6); 3707 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3708 btstack_memory_whitelist_entry_free(entry); 3709 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3710 return true; 3711 } 3712 } 3713 } 3714 3715 // start connecting 3716 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3717 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3718 bd_addr_t null_addr; 3719 memset(null_addr, 0, 6); 3720 hci_send_cmd(&hci_le_create_connection, 3721 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3722 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3723 1, // use whitelist 3724 0, // peer address type 3725 null_addr, // peer bd addr 3726 hci_stack->le_own_addr_type, // our addr type: 3727 hci_stack->le_connection_interval_min, // conn interval min 3728 hci_stack->le_connection_interval_max, // conn interval max 3729 hci_stack->le_connection_latency, // conn latency 3730 hci_stack->le_supervision_timeout, // conn latency 3731 hci_stack->le_minimum_ce_length, // min ce length 3732 hci_stack->le_maximum_ce_length // max ce length 3733 ); 3734 return true; 3735 } 3736 #endif 3737 return false; 3738 } 3739 #endif 3740 3741 static bool hci_run_general_pending_commands(void){ 3742 btstack_linked_item_t * it; 3743 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3744 hci_connection_t * connection = (hci_connection_t *) it; 3745 3746 switch(connection->state){ 3747 case SEND_CREATE_CONNECTION: 3748 switch(connection->address_type){ 3749 #ifdef ENABLE_CLASSIC 3750 case BD_ADDR_TYPE_ACL: 3751 log_info("sending hci_create_connection"); 3752 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3753 break; 3754 #endif 3755 default: 3756 #ifdef ENABLE_BLE 3757 #ifdef ENABLE_LE_CENTRAL 3758 // track outgoing connection 3759 hci_stack->outgoing_addr_type = connection->address_type; 3760 (void)memcpy(hci_stack->outgoing_addr, 3761 connection->address, 6); 3762 log_info("sending hci_le_create_connection"); 3763 hci_send_cmd(&hci_le_create_connection, 3764 hci_stack->le_connection_scan_interval, // conn scan interval 3765 hci_stack->le_connection_scan_window, // conn scan windows 3766 0, // don't use whitelist 3767 connection->address_type, // peer address type 3768 connection->address, // peer bd addr 3769 hci_stack->le_own_addr_type, // our addr type: 3770 hci_stack->le_connection_interval_min, // conn interval min 3771 hci_stack->le_connection_interval_max, // conn interval max 3772 hci_stack->le_connection_latency, // conn latency 3773 hci_stack->le_supervision_timeout, // conn latency 3774 hci_stack->le_minimum_ce_length, // min ce length 3775 hci_stack->le_maximum_ce_length // max ce length 3776 ); 3777 connection->state = SENT_CREATE_CONNECTION; 3778 #endif 3779 #endif 3780 break; 3781 } 3782 return true; 3783 3784 #ifdef ENABLE_CLASSIC 3785 case RECEIVED_CONNECTION_REQUEST: 3786 connection->role = HCI_ROLE_SLAVE; 3787 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3788 log_info("sending hci_accept_connection_request"); 3789 connection->state = ACCEPTED_CONNECTION_REQUEST; 3790 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3791 } 3792 return true; 3793 #endif 3794 3795 #ifdef ENABLE_BLE 3796 #ifdef ENABLE_LE_CENTRAL 3797 case SEND_CANCEL_CONNECTION: 3798 connection->state = SENT_CANCEL_CONNECTION; 3799 hci_send_cmd(&hci_le_create_connection_cancel); 3800 return true; 3801 #endif 3802 #endif 3803 case SEND_DISCONNECT: 3804 connection->state = SENT_DISCONNECT; 3805 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3806 return true; 3807 3808 default: 3809 break; 3810 } 3811 3812 // no further commands if connection is about to get shut down 3813 if (connection->state == SENT_DISCONNECT) continue; 3814 3815 if (connection->authentication_flags & READ_RSSI){ 3816 connectionClearAuthenticationFlags(connection, READ_RSSI); 3817 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3818 return true; 3819 } 3820 3821 #ifdef ENABLE_CLASSIC 3822 3823 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3824 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3825 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3826 return true; 3827 } 3828 3829 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3830 log_info("responding to link key request"); 3831 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3832 3833 link_key_t link_key; 3834 link_key_type_t link_key_type; 3835 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 3836 3837 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3838 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 3839 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 3840 if (sc_downgrade){ 3841 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 3842 connection->state = SENT_DISCONNECT; 3843 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 3844 return true; 3845 } 3846 3847 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 3848 if (have_link_key && security_level_sufficient){ 3849 connection->link_key_type = link_key_type; 3850 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3851 } else { 3852 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3853 } 3854 return true; 3855 } 3856 3857 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3858 log_info("denying to pin request"); 3859 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3860 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3861 return true; 3862 } 3863 3864 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3865 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3866 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3867 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3868 // tweak authentication requirements 3869 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3870 if (connection->bonding_flags & BONDING_DEDICATED){ 3871 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3872 } 3873 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3874 authreq |= 1; 3875 } 3876 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3877 } else { 3878 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3879 } 3880 return true; 3881 } 3882 3883 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3884 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3885 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3886 return true; 3887 } 3888 3889 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3890 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3891 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3892 return true; 3893 } 3894 3895 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 3896 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 3897 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3898 return true; 3899 } 3900 3901 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 3902 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3903 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 3904 return true; 3905 } 3906 3907 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 3908 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3909 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 3910 return true; 3911 } 3912 3913 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3914 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3915 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3916 connection->state = SENT_DISCONNECT; 3917 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3918 return true; 3919 } 3920 3921 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3922 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3923 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 3924 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3925 return true; 3926 } 3927 3928 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3929 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3930 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3931 return true; 3932 } 3933 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3934 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3935 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3936 return true; 3937 } 3938 #endif 3939 3940 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3941 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3942 if (connection->state != SENT_DISCONNECT){ 3943 connection->state = SENT_DISCONNECT; 3944 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 3945 return true; 3946 } 3947 } 3948 3949 #ifdef ENABLE_CLASSIC 3950 uint16_t sniff_min_interval; 3951 switch (connection->sniff_min_interval){ 3952 case 0: 3953 break; 3954 case 0xffff: 3955 connection->sniff_min_interval = 0; 3956 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3957 return true; 3958 default: 3959 sniff_min_interval = connection->sniff_min_interval; 3960 connection->sniff_min_interval = 0; 3961 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3962 return true; 3963 } 3964 3965 if (connection->request_role != HCI_ROLE_INVALID){ 3966 hci_role_t role = connection->request_role; 3967 connection->request_role = HCI_ROLE_INVALID; 3968 hci_send_cmd(&hci_switch_role_command, connection->address, role); 3969 return true; 3970 } 3971 #endif 3972 3973 #ifdef ENABLE_BLE 3974 switch (connection->le_con_parameter_update_state){ 3975 // response to L2CAP CON PARAMETER UPDATE REQUEST 3976 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3977 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3978 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3979 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3980 0x0000, 0xffff); 3981 return true; 3982 case CON_PARAMETER_UPDATE_REPLY: 3983 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3984 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3985 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3986 0x0000, 0xffff); 3987 return true; 3988 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3989 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3990 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3991 return true; 3992 default: 3993 break; 3994 } 3995 if (connection->le_phy_update_all_phys != 0xffu){ 3996 uint8_t all_phys = connection->le_phy_update_all_phys; 3997 connection->le_phy_update_all_phys = 0xff; 3998 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); 3999 return true; 4000 } 4001 #endif 4002 } 4003 return false; 4004 } 4005 4006 static void hci_run(void){ 4007 4008 bool done; 4009 4010 // send continuation fragments first, as they block the prepared packet buffer 4011 done = hci_run_acl_fragments(); 4012 if (done) return; 4013 4014 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4015 // send host num completed packets next as they don't require num_cmd_packets > 0 4016 if (!hci_can_send_comand_packet_transport()) return; 4017 if (hci_stack->host_completed_packets){ 4018 hci_host_num_completed_packets(); 4019 return; 4020 } 4021 #endif 4022 4023 if (!hci_can_send_command_packet_now()) return; 4024 4025 // global/non-connection oriented commands 4026 4027 4028 #ifdef ENABLE_CLASSIC 4029 // general gap classic 4030 done = hci_run_general_gap_classic(); 4031 if (done) return; 4032 #endif 4033 4034 #ifdef ENABLE_BLE 4035 // general gap le 4036 done = hci_run_general_gap_le(); 4037 if (done) return; 4038 #endif 4039 4040 // send pending HCI commands 4041 done = hci_run_general_pending_commands(); 4042 if (done) return; 4043 4044 // stack state sub statemachines 4045 hci_connection_t * connection; 4046 switch (hci_stack->state){ 4047 case HCI_STATE_INITIALIZING: 4048 hci_initializing_run(); 4049 break; 4050 4051 case HCI_STATE_HALTING: 4052 4053 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4054 switch (hci_stack->substate){ 4055 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4056 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4057 4058 #ifdef ENABLE_BLE 4059 #ifdef ENABLE_LE_CENTRAL 4060 // free whitelist entries 4061 { 4062 btstack_linked_list_iterator_t lit; 4063 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4064 while (btstack_linked_list_iterator_has_next(&lit)){ 4065 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4066 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4067 btstack_memory_whitelist_entry_free(entry); 4068 } 4069 } 4070 #endif 4071 #endif 4072 // close all open connections 4073 connection = (hci_connection_t *) hci_stack->connections; 4074 if (connection){ 4075 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4076 if (!hci_can_send_command_packet_now()) return; 4077 4078 // check state 4079 if (connection->state == SENT_DISCONNECT) return; 4080 connection->state = SENT_DISCONNECT; 4081 4082 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4083 4084 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4085 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4086 4087 // ... which would be ignored anyway as we shutdown (free) the connection now 4088 hci_shutdown_connection(connection); 4089 4090 // finally, send the disconnect command 4091 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4092 return; 4093 } 4094 4095 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4096 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4097 log_info("HCI_STATE_HALTING: wait 50 ms"); 4098 hci_stack->substate = HCI_HALTING_W4_TIMER; 4099 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4100 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4101 btstack_run_loop_add_timer(&hci_stack->timeout); 4102 break; 4103 } 4104 4105 /* fall through */ 4106 4107 case HCI_HALTING_CLOSE: 4108 log_info("HCI_STATE_HALTING, calling off"); 4109 4110 // switch mode 4111 hci_power_control_off(); 4112 4113 log_info("HCI_STATE_HALTING, emitting state"); 4114 hci_emit_state(); 4115 log_info("HCI_STATE_HALTING, done"); 4116 break; 4117 4118 case HCI_HALTING_W4_TIMER: 4119 // keep waiting 4120 4121 break; 4122 default: 4123 break; 4124 } 4125 4126 break; 4127 4128 case HCI_STATE_FALLING_ASLEEP: 4129 switch(hci_stack->substate) { 4130 case HCI_FALLING_ASLEEP_DISCONNECT: 4131 log_info("HCI_STATE_FALLING_ASLEEP"); 4132 // close all open connections 4133 connection = (hci_connection_t *) hci_stack->connections; 4134 4135 #ifdef HAVE_PLATFORM_IPHONE_OS 4136 // don't close connections, if H4 supports power management 4137 if (btstack_control_iphone_power_management_enabled()){ 4138 connection = NULL; 4139 } 4140 #endif 4141 if (connection){ 4142 4143 // send disconnect 4144 if (!hci_can_send_command_packet_now()) return; 4145 4146 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4147 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4148 4149 // send disconnected event right away - causes higher layer connections to get closed, too. 4150 hci_shutdown_connection(connection); 4151 return; 4152 } 4153 4154 if (hci_classic_supported()){ 4155 // disable page and inquiry scan 4156 if (!hci_can_send_command_packet_now()) return; 4157 4158 log_info("HCI_STATE_HALTING, disabling inq scans"); 4159 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4160 4161 // continue in next sub state 4162 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4163 break; 4164 } 4165 4166 /* fall through */ 4167 4168 case HCI_FALLING_ASLEEP_COMPLETE: 4169 log_info("HCI_STATE_HALTING, calling sleep"); 4170 #ifdef HAVE_PLATFORM_IPHONE_OS 4171 // don't actually go to sleep, if H4 supports power management 4172 if (btstack_control_iphone_power_management_enabled()){ 4173 // SLEEP MODE reached 4174 hci_stack->state = HCI_STATE_SLEEPING; 4175 hci_emit_state(); 4176 break; 4177 } 4178 #endif 4179 // switch mode 4180 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4181 hci_emit_state(); 4182 break; 4183 4184 default: 4185 break; 4186 } 4187 break; 4188 4189 default: 4190 break; 4191 } 4192 } 4193 4194 int hci_send_cmd_packet(uint8_t *packet, int size){ 4195 // house-keeping 4196 4197 #ifdef ENABLE_CLASSIC 4198 bd_addr_t addr; 4199 hci_connection_t * conn; 4200 #endif 4201 #ifdef ENABLE_LE_CENTRAL 4202 uint8_t initiator_filter_policy; 4203 #endif 4204 4205 uint16_t opcode = little_endian_read_16(packet, 0); 4206 switch (opcode) { 4207 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4208 hci_stack->loopback_mode = packet[3]; 4209 break; 4210 4211 #ifdef ENABLE_CLASSIC 4212 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4213 reverse_bd_addr(&packet[3], addr); 4214 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4215 4216 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4217 if (!conn) { 4218 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4219 if (!conn) { 4220 // notify client that alloc failed 4221 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4222 return -1; // packet not sent to controller 4223 } 4224 conn->state = SEND_CREATE_CONNECTION; 4225 conn->role = HCI_ROLE_MASTER; 4226 } 4227 log_info("conn state %u", conn->state); 4228 switch (conn->state) { 4229 // if connection active exists 4230 case OPEN: 4231 // and OPEN, emit connection complete command 4232 hci_emit_connection_complete(addr, conn->con_handle, 0); 4233 return -1; // packet not sent to controller 4234 case RECEIVED_DISCONNECTION_COMPLETE: 4235 // create connection triggered in disconnect complete event, let's do it now 4236 break; 4237 case SEND_CREATE_CONNECTION: 4238 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4239 break; 4240 default: 4241 // otherwise, just ignore as it is already in the open process 4242 return -1; // packet not sent to controller 4243 } 4244 conn->state = SENT_CREATE_CONNECTION; 4245 4246 // track outgoing connection 4247 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4248 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4249 break; 4250 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4251 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4252 break; 4253 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4254 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4255 break; 4256 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4257 if (hci_stack->link_key_db) { 4258 reverse_bd_addr(&packet[3], addr); 4259 hci_stack->link_key_db->delete_link_key(addr); 4260 } 4261 break; 4262 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4263 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4264 reverse_bd_addr(&packet[3], addr); 4265 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4266 if (conn) { 4267 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4268 } 4269 break; 4270 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4271 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4272 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4273 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4274 reverse_bd_addr(&packet[3], addr); 4275 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4276 if (conn) { 4277 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4278 } 4279 break; 4280 4281 #ifdef ENABLE_SCO_OVER_HCI 4282 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4283 // setup_synchronous_connection? Voice setting at offset 22 4284 // TODO: compare to current setting if sco connection already active 4285 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4286 break; 4287 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4288 // accept_synchronus_connection? Voice setting at offset 18 4289 // TODO: compare to current setting if sco connection already active 4290 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4291 break; 4292 #endif 4293 #endif 4294 4295 #ifdef ENABLE_BLE 4296 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4297 hci_stack->le_random_address_set = 1; 4298 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4299 break; 4300 #ifdef ENABLE_LE_PERIPHERAL 4301 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4302 hci_stack->le_advertisements_active = packet[3]; 4303 break; 4304 #endif 4305 #ifdef ENABLE_LE_CENTRAL 4306 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4307 // white list used? 4308 initiator_filter_policy = packet[7]; 4309 switch (initiator_filter_policy) { 4310 case 0: 4311 // whitelist not used 4312 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4313 break; 4314 case 1: 4315 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4316 break; 4317 default: 4318 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4319 break; 4320 } 4321 break; 4322 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4323 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4324 break; 4325 #endif 4326 #endif 4327 default: 4328 break; 4329 } 4330 4331 hci_stack->num_cmd_packets--; 4332 4333 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4334 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4335 } 4336 4337 // disconnect because of security block 4338 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4339 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4340 if (!connection) return; 4341 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4342 } 4343 4344 4345 // Configure Secure Simple Pairing 4346 4347 #ifdef ENABLE_CLASSIC 4348 4349 // enable will enable SSP during init 4350 void gap_ssp_set_enable(int enable){ 4351 hci_stack->ssp_enable = enable; 4352 } 4353 4354 static int hci_local_ssp_activated(void){ 4355 return gap_ssp_supported() && hci_stack->ssp_enable; 4356 } 4357 4358 // if set, BTstack will respond to io capability request using authentication requirement 4359 void gap_ssp_set_io_capability(int io_capability){ 4360 hci_stack->ssp_io_capability = io_capability; 4361 } 4362 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4363 hci_stack->ssp_authentication_requirement = authentication_requirement; 4364 } 4365 4366 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4367 void gap_ssp_set_auto_accept(int auto_accept){ 4368 hci_stack->ssp_auto_accept = auto_accept; 4369 } 4370 4371 void gap_secure_connections_enable(bool enable){ 4372 hci_stack->secure_connections_enable = enable; 4373 } 4374 4375 #endif 4376 4377 // va_list part of hci_send_cmd 4378 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4379 if (!hci_can_send_command_packet_now()){ 4380 log_error("hci_send_cmd called but cannot send packet now"); 4381 return 0; 4382 } 4383 4384 // for HCI INITIALIZATION 4385 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4386 hci_stack->last_cmd_opcode = cmd->opcode; 4387 4388 hci_reserve_packet_buffer(); 4389 uint8_t * packet = hci_stack->hci_packet_buffer; 4390 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4391 int err = hci_send_cmd_packet(packet, size); 4392 4393 // release packet buffer on error or for synchronous transport implementations 4394 if ((err < 0) || hci_transport_synchronous()){ 4395 hci_release_packet_buffer(); 4396 hci_emit_transport_packet_sent(); 4397 } 4398 4399 return err; 4400 } 4401 4402 /** 4403 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4404 */ 4405 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4406 va_list argptr; 4407 va_start(argptr, cmd); 4408 int res = hci_send_cmd_va_arg(cmd, argptr); 4409 va_end(argptr); 4410 return res; 4411 } 4412 4413 // Create various non-HCI events. 4414 // TODO: generalize, use table similar to hci_create_command 4415 4416 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4417 // dump packet 4418 if (dump) { 4419 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4420 } 4421 4422 // dispatch to all event handlers 4423 btstack_linked_list_iterator_t it; 4424 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4425 while (btstack_linked_list_iterator_has_next(&it)){ 4426 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4427 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4428 } 4429 } 4430 4431 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4432 if (!hci_stack->acl_packet_handler) return; 4433 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4434 } 4435 4436 #ifdef ENABLE_CLASSIC 4437 static void hci_notify_if_sco_can_send_now(void){ 4438 // notify SCO sender if waiting 4439 if (!hci_stack->sco_waiting_for_can_send_now) return; 4440 if (hci_can_send_sco_packet_now()){ 4441 hci_stack->sco_waiting_for_can_send_now = 0; 4442 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4443 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4444 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4445 } 4446 } 4447 4448 // parsing end emitting has been merged to reduce code size 4449 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4450 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4451 4452 uint8_t * eir_data; 4453 ad_context_t context; 4454 const uint8_t * name; 4455 uint8_t name_len; 4456 4457 if (size < 3) return; 4458 4459 int event_type = hci_event_packet_get_type(packet); 4460 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4461 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4462 4463 switch (event_type){ 4464 case HCI_EVENT_INQUIRY_RESULT: 4465 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4466 if (size != (3 + (num_responses * 14))) return; 4467 break; 4468 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4469 if (size != 257) return; 4470 if (num_responses != 1) return; 4471 break; 4472 default: 4473 return; 4474 } 4475 4476 // event[1] is set at the end 4477 int i; 4478 for (i=0; i<num_responses;i++){ 4479 memset(event, 0, sizeof(event)); 4480 event[0] = GAP_EVENT_INQUIRY_RESULT; 4481 uint8_t event_size = 18; // if name is not set by EIR 4482 4483 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4484 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4485 (void)memcpy(&event[9], 4486 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4487 3); // class of device 4488 (void)memcpy(&event[12], 4489 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4490 2); // clock offset 4491 4492 switch (event_type){ 4493 case HCI_EVENT_INQUIRY_RESULT: 4494 // 14,15,16,17 = 0, size 18 4495 break; 4496 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4497 event[14] = 1; 4498 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4499 // 16,17 = 0, size 18 4500 break; 4501 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4502 event[14] = 1; 4503 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4504 // EIR packets only contain a single inquiry response 4505 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4506 name = NULL; 4507 // Iterate over EIR data 4508 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4509 uint8_t data_type = ad_iterator_get_data_type(&context); 4510 uint8_t data_size = ad_iterator_get_data_len(&context); 4511 const uint8_t * data = ad_iterator_get_data(&context); 4512 // Prefer Complete Local Name over Shortend Local Name 4513 switch (data_type){ 4514 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4515 if (name) continue; 4516 /* fall through */ 4517 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4518 name = data; 4519 name_len = data_size; 4520 break; 4521 default: 4522 break; 4523 } 4524 } 4525 if (name){ 4526 event[16] = 1; 4527 // truncate name if needed 4528 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4529 event[17] = len; 4530 (void)memcpy(&event[18], name, len); 4531 event_size += len; 4532 } 4533 break; 4534 } 4535 event[1] = event_size - 2; 4536 hci_emit_event(event, event_size, 1); 4537 } 4538 } 4539 #endif 4540 4541 void hci_emit_state(void){ 4542 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4543 uint8_t event[3]; 4544 event[0] = BTSTACK_EVENT_STATE; 4545 event[1] = sizeof(event) - 2u; 4546 event[2] = hci_stack->state; 4547 hci_emit_event(event, sizeof(event), 1); 4548 } 4549 4550 #ifdef ENABLE_CLASSIC 4551 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4552 uint8_t event[13]; 4553 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4554 event[1] = sizeof(event) - 2; 4555 event[2] = status; 4556 little_endian_store_16(event, 3, con_handle); 4557 reverse_bd_addr(address, &event[5]); 4558 event[11] = 1; // ACL connection 4559 event[12] = 0; // encryption disabled 4560 hci_emit_event(event, sizeof(event), 1); 4561 } 4562 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4563 if (disable_l2cap_timeouts) return; 4564 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4565 uint8_t event[4]; 4566 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4567 event[1] = sizeof(event) - 2; 4568 little_endian_store_16(event, 2, conn->con_handle); 4569 hci_emit_event(event, sizeof(event), 1); 4570 } 4571 #endif 4572 4573 #ifdef ENABLE_BLE 4574 #ifdef ENABLE_LE_CENTRAL 4575 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4576 uint8_t event[21]; 4577 event[0] = HCI_EVENT_LE_META; 4578 event[1] = sizeof(event) - 2u; 4579 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4580 event[3] = status; 4581 little_endian_store_16(event, 4, con_handle); 4582 event[6] = 0; // TODO: role 4583 event[7] = address_type; 4584 reverse_bd_addr(address, &event[8]); 4585 little_endian_store_16(event, 14, 0); // interval 4586 little_endian_store_16(event, 16, 0); // latency 4587 little_endian_store_16(event, 18, 0); // supervision timeout 4588 event[20] = 0; // master clock accuracy 4589 hci_emit_event(event, sizeof(event), 1); 4590 } 4591 #endif 4592 #endif 4593 4594 static void hci_emit_transport_packet_sent(void){ 4595 // notify upper stack that it might be possible to send again 4596 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4597 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4598 } 4599 4600 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4601 uint8_t event[6]; 4602 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4603 event[1] = sizeof(event) - 2u; 4604 event[2] = 0; // status = OK 4605 little_endian_store_16(event, 3, con_handle); 4606 event[5] = reason; 4607 hci_emit_event(event, sizeof(event), 1); 4608 } 4609 4610 static void hci_emit_nr_connections_changed(void){ 4611 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4612 uint8_t event[3]; 4613 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4614 event[1] = sizeof(event) - 2u; 4615 event[2] = nr_hci_connections(); 4616 hci_emit_event(event, sizeof(event), 1); 4617 } 4618 4619 static void hci_emit_hci_open_failed(void){ 4620 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4621 uint8_t event[2]; 4622 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4623 event[1] = sizeof(event) - 2u; 4624 hci_emit_event(event, sizeof(event), 1); 4625 } 4626 4627 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4628 log_info("hci_emit_dedicated_bonding_result %u ", status); 4629 uint8_t event[9]; 4630 int pos = 0; 4631 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4632 event[pos++] = sizeof(event) - 2u; 4633 event[pos++] = status; 4634 reverse_bd_addr(address, &event[pos]); 4635 hci_emit_event(event, sizeof(event), 1); 4636 } 4637 4638 4639 #ifdef ENABLE_CLASSIC 4640 4641 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4642 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4643 uint8_t event[5]; 4644 int pos = 0; 4645 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4646 event[pos++] = sizeof(event) - 2; 4647 little_endian_store_16(event, 2, con_handle); 4648 pos += 2; 4649 event[pos++] = level; 4650 hci_emit_event(event, sizeof(event), 1); 4651 } 4652 4653 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4654 if (!connection) return LEVEL_0; 4655 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4656 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 4657 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4658 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4659 // LEVEL 4 always requires 128 bit encrytion key size 4660 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4661 security_level = LEVEL_3; 4662 } 4663 return security_level; 4664 } 4665 4666 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4667 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4668 uint8_t event[3]; 4669 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4670 event[1] = sizeof(event) - 2; 4671 event[2] = enabled; 4672 hci_emit_event(event, sizeof(event), 1); 4673 } 4674 4675 // query if remote side supports eSCO 4676 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4677 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4678 if (!connection) return 0; 4679 return (connection->remote_supported_features[0] & 1) != 0; 4680 } 4681 4682 static bool hci_ssp_supported(hci_connection_t * connection){ 4683 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4684 return (connection->bonding_flags & mask) == mask; 4685 } 4686 4687 // query if remote side supports SSP 4688 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4689 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4690 if (!connection) return 0; 4691 return hci_ssp_supported(connection) ? 1 : 0; 4692 } 4693 4694 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4695 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4696 } 4697 4698 // GAP API 4699 /** 4700 * @bbrief enable/disable bonding. default is enabled 4701 * @praram enabled 4702 */ 4703 void gap_set_bondable_mode(int enable){ 4704 hci_stack->bondable = enable ? 1 : 0; 4705 } 4706 /** 4707 * @brief Get bondable mode. 4708 * @return 1 if bondable 4709 */ 4710 int gap_get_bondable_mode(void){ 4711 return hci_stack->bondable; 4712 } 4713 4714 /** 4715 * @brief map link keys to security levels 4716 */ 4717 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4718 switch (link_key_type){ 4719 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4720 return LEVEL_4; 4721 case COMBINATION_KEY: 4722 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4723 return LEVEL_3; 4724 default: 4725 return LEVEL_2; 4726 } 4727 } 4728 4729 /** 4730 * @brief map link keys to secure connection yes/no 4731 */ 4732 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4733 switch (link_key_type){ 4734 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4735 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4736 return 1; 4737 default: 4738 return 0; 4739 } 4740 } 4741 4742 /** 4743 * @brief map link keys to authenticated 4744 */ 4745 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4746 switch (link_key_type){ 4747 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4748 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4749 return 1; 4750 default: 4751 return 0; 4752 } 4753 } 4754 4755 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4756 log_info("gap_mitm_protection_required_for_security_level %u", level); 4757 return level > LEVEL_2; 4758 } 4759 4760 /** 4761 * @brief get current security level 4762 */ 4763 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4764 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4765 if (!connection) return LEVEL_0; 4766 return gap_security_level_for_connection(connection); 4767 } 4768 4769 /** 4770 * @brief request connection to device to 4771 * @result GAP_AUTHENTICATION_RESULT 4772 */ 4773 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4774 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4775 if (!connection){ 4776 hci_emit_security_level(con_handle, LEVEL_0); 4777 return; 4778 } 4779 gap_security_level_t current_level = gap_security_level(con_handle); 4780 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4781 requested_level, connection->requested_security_level, current_level); 4782 4783 // assumption: earlier requested security higher than current level => security request is active 4784 if (current_level < connection->requested_security_level){ 4785 if (connection->requested_security_level < requested_level){ 4786 // increase requested level as new level is higher 4787 4788 // TODO: handle re-authentication when done 4789 4790 connection->requested_security_level = requested_level; 4791 } 4792 return; 4793 } 4794 4795 // no request active, notify if security sufficient 4796 if (requested_level <= current_level){ 4797 hci_emit_security_level(con_handle, current_level); 4798 return; 4799 } 4800 4801 // start pairing to increase security level 4802 connection->requested_security_level = requested_level; 4803 4804 #if 0 4805 // sending encryption request without a link key results in an error. 4806 // TODO: figure out how to use it properly 4807 4808 // would enabling ecnryption suffice (>= LEVEL_2)? 4809 if (hci_stack->link_key_db){ 4810 link_key_type_t link_key_type; 4811 link_key_t link_key; 4812 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4813 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4814 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4815 return; 4816 } 4817 } 4818 } 4819 #endif 4820 4821 // start to authenticate connection if not already active 4822 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 4823 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4824 hci_run(); 4825 } 4826 4827 /** 4828 * @brief start dedicated bonding with device. disconnect after bonding 4829 * @param device 4830 * @param request MITM protection 4831 * @result GAP_DEDICATED_BONDING_COMPLETE 4832 */ 4833 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4834 4835 // create connection state machine 4836 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4837 4838 if (!connection){ 4839 return BTSTACK_MEMORY_ALLOC_FAILED; 4840 } 4841 4842 // delete linkn key 4843 gap_drop_link_key_for_bd_addr(device); 4844 4845 // configure LEVEL_2/3, dedicated bonding 4846 connection->state = SEND_CREATE_CONNECTION; 4847 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4848 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4849 connection->bonding_flags = BONDING_DEDICATED; 4850 4851 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4852 4853 // handle: connnection failure (connection complete != ok) 4854 // handle: authentication failure 4855 // handle: disconnect on done 4856 4857 hci_run(); 4858 4859 return 0; 4860 } 4861 #endif 4862 4863 void gap_set_local_name(const char * local_name){ 4864 hci_stack->local_name = local_name; 4865 } 4866 4867 4868 #ifdef ENABLE_BLE 4869 4870 #ifdef ENABLE_LE_CENTRAL 4871 void gap_start_scan(void){ 4872 hci_stack->le_scanning_enabled = 1; 4873 hci_run(); 4874 } 4875 4876 void gap_stop_scan(void){ 4877 hci_stack->le_scanning_enabled = 0; 4878 hci_run(); 4879 } 4880 4881 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4882 hci_stack->le_scan_type = scan_type; 4883 hci_stack->le_scan_interval = scan_interval; 4884 hci_stack->le_scan_window = scan_window; 4885 hci_run(); 4886 } 4887 4888 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4889 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4890 if (!conn){ 4891 log_info("gap_connect: no connection exists yet, creating context"); 4892 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4893 if (!conn){ 4894 // notify client that alloc failed 4895 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4896 log_info("gap_connect: failed to alloc hci_connection_t"); 4897 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4898 } 4899 conn->state = SEND_CREATE_CONNECTION; 4900 log_info("gap_connect: send create connection next"); 4901 hci_run(); 4902 return ERROR_CODE_SUCCESS; 4903 } 4904 4905 if (!hci_is_le_connection(conn) || 4906 (conn->state == SEND_CREATE_CONNECTION) || 4907 (conn->state == SENT_CREATE_CONNECTION)) { 4908 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4909 log_error("gap_connect: classic connection or connect is already being created"); 4910 return GATT_CLIENT_IN_WRONG_STATE; 4911 } 4912 4913 // check if connection was just disconnected 4914 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4915 log_info("gap_connect: send create connection (again)"); 4916 conn->state = SEND_CREATE_CONNECTION; 4917 hci_run(); 4918 return ERROR_CODE_SUCCESS; 4919 } 4920 4921 log_info("gap_connect: context exists with state %u", conn->state); 4922 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4923 hci_run(); 4924 return ERROR_CODE_SUCCESS; 4925 } 4926 4927 // @assumption: only a single outgoing LE Connection exists 4928 static hci_connection_t * gap_get_outgoing_connection(void){ 4929 btstack_linked_item_t *it; 4930 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4931 hci_connection_t * conn = (hci_connection_t *) it; 4932 if (!hci_is_le_connection(conn)) continue; 4933 switch (conn->state){ 4934 case SEND_CREATE_CONNECTION: 4935 case SENT_CREATE_CONNECTION: 4936 case SENT_CANCEL_CONNECTION: 4937 return conn; 4938 default: 4939 break; 4940 }; 4941 } 4942 return NULL; 4943 } 4944 4945 uint8_t gap_connect_cancel(void){ 4946 hci_connection_t * conn = gap_get_outgoing_connection(); 4947 if (!conn) return 0; 4948 switch (conn->state){ 4949 case SEND_CREATE_CONNECTION: 4950 // skip sending create connection and emit event instead 4951 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4952 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4953 btstack_memory_hci_connection_free( conn ); 4954 break; 4955 case SENT_CREATE_CONNECTION: 4956 // request to send cancel connection 4957 conn->state = SEND_CANCEL_CONNECTION; 4958 hci_run(); 4959 break; 4960 default: 4961 break; 4962 } 4963 return 0; 4964 } 4965 #endif 4966 4967 #ifdef ENABLE_LE_CENTRAL 4968 /** 4969 * @brief Set connection parameters for outgoing connections 4970 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4971 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4972 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4973 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4974 * @param conn_latency, default: 4 4975 * @param supervision_timeout (unit: 10ms), default: 720 ms 4976 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4977 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4978 */ 4979 4980 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4981 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4982 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4983 hci_stack->le_connection_scan_interval = conn_scan_interval; 4984 hci_stack->le_connection_scan_window = conn_scan_window; 4985 hci_stack->le_connection_interval_min = conn_interval_min; 4986 hci_stack->le_connection_interval_max = conn_interval_max; 4987 hci_stack->le_connection_latency = conn_latency; 4988 hci_stack->le_supervision_timeout = supervision_timeout; 4989 hci_stack->le_minimum_ce_length = min_ce_length; 4990 hci_stack->le_maximum_ce_length = max_ce_length; 4991 } 4992 #endif 4993 4994 /** 4995 * @brief Updates the connection parameters for a given LE connection 4996 * @param handle 4997 * @param conn_interval_min (unit: 1.25ms) 4998 * @param conn_interval_max (unit: 1.25ms) 4999 * @param conn_latency 5000 * @param supervision_timeout (unit: 10ms) 5001 * @returns 0 if ok 5002 */ 5003 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5004 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5005 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5006 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5007 connection->le_conn_interval_min = conn_interval_min; 5008 connection->le_conn_interval_max = conn_interval_max; 5009 connection->le_conn_latency = conn_latency; 5010 connection->le_supervision_timeout = supervision_timeout; 5011 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5012 hci_run(); 5013 return 0; 5014 } 5015 5016 /** 5017 * @brief Request an update of the connection parameter for a given LE connection 5018 * @param handle 5019 * @param conn_interval_min (unit: 1.25ms) 5020 * @param conn_interval_max (unit: 1.25ms) 5021 * @param conn_latency 5022 * @param supervision_timeout (unit: 10ms) 5023 * @returns 0 if ok 5024 */ 5025 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5026 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5027 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5028 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5029 connection->le_conn_interval_min = conn_interval_min; 5030 connection->le_conn_interval_max = conn_interval_max; 5031 connection->le_conn_latency = conn_latency; 5032 connection->le_supervision_timeout = supervision_timeout; 5033 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5034 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5035 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5036 return 0; 5037 } 5038 5039 #ifdef ENABLE_LE_PERIPHERAL 5040 5041 static void gap_advertisments_changed(void){ 5042 // disable advertisements before updating adv, scan data, or adv params 5043 if (hci_stack->le_advertisements_active){ 5044 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 5045 } 5046 hci_run(); 5047 } 5048 5049 /** 5050 * @brief Set Advertisement Data 5051 * @param advertising_data_length 5052 * @param advertising_data (max 31 octets) 5053 * @note data is not copied, pointer has to stay valid 5054 */ 5055 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5056 hci_stack->le_advertisements_data_len = advertising_data_length; 5057 hci_stack->le_advertisements_data = advertising_data; 5058 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5059 gap_advertisments_changed(); 5060 } 5061 5062 /** 5063 * @brief Set Scan Response Data 5064 * @param advertising_data_length 5065 * @param advertising_data (max 31 octets) 5066 * @note data is not copied, pointer has to stay valid 5067 */ 5068 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5069 hci_stack->le_scan_response_data_len = scan_response_data_length; 5070 hci_stack->le_scan_response_data = scan_response_data; 5071 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5072 gap_advertisments_changed(); 5073 } 5074 5075 /** 5076 * @brief Set Advertisement Parameters 5077 * @param adv_int_min 5078 * @param adv_int_max 5079 * @param adv_type 5080 * @param direct_address_type 5081 * @param direct_address 5082 * @param channel_map 5083 * @param filter_policy 5084 * 5085 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5086 */ 5087 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5088 uint8_t direct_address_typ, bd_addr_t direct_address, 5089 uint8_t channel_map, uint8_t filter_policy) { 5090 5091 hci_stack->le_advertisements_interval_min = adv_int_min; 5092 hci_stack->le_advertisements_interval_max = adv_int_max; 5093 hci_stack->le_advertisements_type = adv_type; 5094 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5095 hci_stack->le_advertisements_channel_map = channel_map; 5096 hci_stack->le_advertisements_filter_policy = filter_policy; 5097 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5098 6); 5099 5100 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5101 gap_advertisments_changed(); 5102 } 5103 5104 /** 5105 * @brief Enable/Disable Advertisements 5106 * @param enabled 5107 */ 5108 void gap_advertisements_enable(int enabled){ 5109 hci_stack->le_advertisements_enabled = enabled; 5110 if (enabled && !hci_stack->le_advertisements_active){ 5111 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 5112 } 5113 if (!enabled && hci_stack->le_advertisements_active){ 5114 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 5115 } 5116 hci_run(); 5117 } 5118 5119 #endif 5120 5121 void hci_le_set_own_address_type(uint8_t own_address_type){ 5122 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5123 if (own_address_type == hci_stack->le_own_addr_type) return; 5124 hci_stack->le_own_addr_type = own_address_type; 5125 5126 #ifdef ENABLE_LE_PERIPHERAL 5127 // update advertisement parameters, too 5128 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5129 gap_advertisments_changed(); 5130 #endif 5131 #ifdef ENABLE_LE_CENTRAL 5132 // note: we don't update scan parameters or modify ongoing connection attempts 5133 #endif 5134 } 5135 5136 #endif 5137 5138 uint8_t gap_disconnect(hci_con_handle_t handle){ 5139 hci_connection_t * conn = hci_connection_for_handle(handle); 5140 if (!conn){ 5141 hci_emit_disconnection_complete(handle, 0); 5142 return 0; 5143 } 5144 // ignore if already disconnected 5145 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5146 return 0; 5147 } 5148 conn->state = SEND_DISCONNECT; 5149 hci_run(); 5150 return 0; 5151 } 5152 5153 int gap_read_rssi(hci_con_handle_t con_handle){ 5154 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5155 if (hci_connection == NULL) return 0; 5156 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5157 hci_run(); 5158 return 1; 5159 } 5160 5161 /** 5162 * @brief Get connection type 5163 * @param con_handle 5164 * @result connection_type 5165 */ 5166 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5167 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5168 if (!conn) return GAP_CONNECTION_INVALID; 5169 switch (conn->address_type){ 5170 case BD_ADDR_TYPE_LE_PUBLIC: 5171 case BD_ADDR_TYPE_LE_RANDOM: 5172 return GAP_CONNECTION_LE; 5173 case BD_ADDR_TYPE_SCO: 5174 return GAP_CONNECTION_SCO; 5175 case BD_ADDR_TYPE_ACL: 5176 return GAP_CONNECTION_ACL; 5177 default: 5178 return GAP_CONNECTION_INVALID; 5179 } 5180 } 5181 5182 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5183 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5184 if (!conn) return HCI_ROLE_INVALID; 5185 return (hci_role_t) conn->role; 5186 } 5187 5188 5189 uint8_t gap_request_role(bd_addr_t addr, hci_role_t role){ 5190 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5191 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5192 conn->request_role = role; 5193 hci_run(); 5194 } 5195 5196 #ifdef ENABLE_BLE 5197 5198 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){ 5199 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5200 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5201 5202 conn->le_phy_update_all_phys = all_phys; 5203 conn->le_phy_update_tx_phys = tx_phys; 5204 conn->le_phy_update_rx_phys = rx_phys; 5205 conn->le_phy_update_phy_options = phy_options; 5206 5207 hci_run(); 5208 5209 return 0; 5210 } 5211 5212 #ifdef ENABLE_LE_CENTRAL 5213 /** 5214 * @brief Auto Connection Establishment - Start Connecting to device 5215 * @param address_typ 5216 * @param address 5217 * @returns 0 if ok 5218 */ 5219 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 5220 // check capacity 5221 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 5222 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 5223 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5224 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5225 entry->address_type = address_type; 5226 (void)memcpy(entry->address, address, 6); 5227 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5228 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5229 hci_run(); 5230 return 0; 5231 } 5232 5233 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5234 btstack_linked_list_iterator_t it; 5235 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5236 while (btstack_linked_list_iterator_has_next(&it)){ 5237 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5238 if (entry->address_type != address_type) continue; 5239 if (memcmp(entry->address, address, 6) != 0) continue; 5240 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5241 // remove from controller if already present 5242 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5243 continue; 5244 } 5245 // direclty remove entry from whitelist 5246 btstack_linked_list_iterator_remove(&it); 5247 btstack_memory_whitelist_entry_free(entry); 5248 } 5249 } 5250 5251 /** 5252 * @brief Auto Connection Establishment - Stop Connecting to device 5253 * @param address_typ 5254 * @param address 5255 * @returns 0 if ok 5256 */ 5257 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5258 hci_remove_from_whitelist(address_type, address); 5259 hci_run(); 5260 return 0; 5261 } 5262 5263 /** 5264 * @brief Auto Connection Establishment - Stop everything 5265 * @note Convenience function to stop all active auto connection attempts 5266 */ 5267 void gap_auto_connection_stop_all(void){ 5268 btstack_linked_list_iterator_t it; 5269 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5270 while (btstack_linked_list_iterator_has_next(&it)){ 5271 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5272 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5273 // remove from controller if already present 5274 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5275 continue; 5276 } 5277 // directly remove entry from whitelist 5278 btstack_linked_list_iterator_remove(&it); 5279 btstack_memory_whitelist_entry_free(entry); 5280 } 5281 hci_run(); 5282 } 5283 5284 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5285 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5286 if (!conn) return 0; 5287 return conn->le_connection_interval; 5288 } 5289 #endif 5290 #endif 5291 5292 #ifdef ENABLE_CLASSIC 5293 /** 5294 * @brief Set Extended Inquiry Response data 5295 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5296 * @note has to be done before stack starts up 5297 */ 5298 void gap_set_extended_inquiry_response(const uint8_t * data){ 5299 hci_stack->eir_data = data; 5300 } 5301 5302 /** 5303 * @brief Start GAP Classic Inquiry 5304 * @param duration in 1.28s units 5305 * @return 0 if ok 5306 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5307 */ 5308 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5309 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5310 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5311 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5312 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5313 } 5314 hci_stack->inquiry_state = duration_in_1280ms_units; 5315 hci_run(); 5316 return 0; 5317 } 5318 5319 /** 5320 * @brief Stop GAP Classic Inquiry 5321 * @returns 0 if ok 5322 */ 5323 int gap_inquiry_stop(void){ 5324 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5325 // emit inquiry complete event, before it even started 5326 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5327 hci_emit_event(event, sizeof(event), 1); 5328 return 0; 5329 } 5330 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5331 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5332 hci_run(); 5333 return 0; 5334 } 5335 5336 5337 /** 5338 * @brief Remote Name Request 5339 * @param addr 5340 * @param page_scan_repetition_mode 5341 * @param clock_offset only used when bit 15 is set 5342 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5343 */ 5344 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5345 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5346 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5347 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5348 hci_stack->remote_name_clock_offset = clock_offset; 5349 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5350 hci_run(); 5351 return 0; 5352 } 5353 5354 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5355 hci_stack->gap_pairing_state = state; 5356 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5357 hci_run(); 5358 return 0; 5359 } 5360 5361 /** 5362 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5363 * @param addr 5364 * @param pin_data 5365 * @param pin_len 5366 * @return 0 if ok 5367 */ 5368 int gap_pin_code_response_binary(bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5369 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5370 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5371 hci_stack->gap_pairing_pin_len = pin_len; 5372 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5373 } 5374 5375 /** 5376 * @brief Legacy Pairing Pin Code Response 5377 * @param addr 5378 * @param pin 5379 * @return 0 if ok 5380 */ 5381 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5382 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5383 } 5384 5385 /** 5386 * @brief Abort Legacy Pairing 5387 * @param addr 5388 * @param pin 5389 * @return 0 if ok 5390 */ 5391 int gap_pin_code_negative(bd_addr_t addr){ 5392 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5393 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5394 } 5395 5396 /** 5397 * @brief SSP Passkey Response 5398 * @param addr 5399 * @param passkey 5400 * @return 0 if ok 5401 */ 5402 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5403 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5404 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5405 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5406 } 5407 5408 /** 5409 * @brief Abort SSP Passkey Entry/Pairing 5410 * @param addr 5411 * @param pin 5412 * @return 0 if ok 5413 */ 5414 int gap_ssp_passkey_negative(bd_addr_t addr){ 5415 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5416 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5417 } 5418 5419 /** 5420 * @brief Accept SSP Numeric Comparison 5421 * @param addr 5422 * @param passkey 5423 * @return 0 if ok 5424 */ 5425 int gap_ssp_confirmation_response(bd_addr_t addr){ 5426 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5427 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5428 } 5429 5430 /** 5431 * @brief Abort SSP Numeric Comparison/Pairing 5432 * @param addr 5433 * @param pin 5434 * @return 0 if ok 5435 */ 5436 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5437 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5438 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5439 } 5440 5441 /** 5442 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5443 * @param inquiry_mode see bluetooth_defines.h 5444 */ 5445 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5446 hci_stack->inquiry_mode = mode; 5447 } 5448 5449 /** 5450 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5451 */ 5452 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5453 hci_stack->sco_voice_setting = voice_setting; 5454 } 5455 5456 /** 5457 * @brief Get SCO Voice Setting 5458 * @return current voice setting 5459 */ 5460 uint16_t hci_get_sco_voice_setting(void){ 5461 return hci_stack->sco_voice_setting; 5462 } 5463 5464 static int hci_have_usb_transport(void){ 5465 if (!hci_stack->hci_transport) return 0; 5466 const char * transport_name = hci_stack->hci_transport->name; 5467 if (!transport_name) return 0; 5468 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5469 } 5470 5471 /** @brief Get SCO packet length for current SCO Voice setting 5472 * @note Using SCO packets of the exact length is required for USB transfer 5473 * @return Length of SCO packets in bytes (not audio frames) 5474 */ 5475 int hci_get_sco_packet_length(void){ 5476 int sco_packet_length = 0; 5477 5478 #ifdef ENABLE_SCO_OVER_HCI 5479 5480 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5481 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5482 5483 if (hci_have_usb_transport()){ 5484 // see Core Spec for H2 USB Transfer. 5485 // 3 byte SCO header + 24 bytes per connection 5486 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5487 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5488 } else { 5489 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5490 sco_packet_length = 3 + 60 * multiplier; 5491 // assert that it still fits inside an SCO buffer 5492 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5493 sco_packet_length = 3 + 60; 5494 } 5495 } 5496 #endif 5497 return sco_packet_length; 5498 } 5499 5500 /** 5501 * @brief Sets the master/slave policy 5502 * @param policy (0: attempt to become master, 1: let connecting device decide) 5503 */ 5504 void hci_set_master_slave_policy(uint8_t policy){ 5505 hci_stack->master_slave_policy = policy; 5506 } 5507 5508 #endif 5509 5510 HCI_STATE hci_get_state(void){ 5511 return hci_stack->state; 5512 } 5513 5514 #ifdef ENABLE_CLASSIC 5515 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5516 hci_stack->gap_classic_accept_callback = accept_callback; 5517 } 5518 #endif 5519 5520 /** 5521 * @brief Set callback for Bluetooth Hardware Error 5522 */ 5523 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5524 hci_stack->hardware_error_callback = fn; 5525 } 5526 5527 void hci_disconnect_all(void){ 5528 btstack_linked_list_iterator_t it; 5529 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5530 while (btstack_linked_list_iterator_has_next(&it)){ 5531 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5532 if (con->state == SENT_DISCONNECT) continue; 5533 con->state = SEND_DISCONNECT; 5534 } 5535 hci_run(); 5536 } 5537 5538 uint16_t hci_get_manufacturer(void){ 5539 return hci_stack->manufacturer; 5540 } 5541 5542 #ifdef ENABLE_BLE 5543 5544 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5545 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5546 if (!hci_con) return NULL; 5547 return &hci_con->sm_connection; 5548 } 5549 5550 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5551 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5552 5553 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5554 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5555 if (hci_connection == NULL) return 0; 5556 if (hci_is_le_connection(hci_connection)){ 5557 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5558 if (sm_conn->sm_connection_encrypted) { 5559 return sm_conn->sm_actual_encryption_key_size; 5560 } 5561 } 5562 #ifdef ENABLE_CLASSIC 5563 else { 5564 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5565 return hci_connection->encryption_key_size; 5566 } 5567 } 5568 #endif 5569 return 0; 5570 } 5571 5572 int gap_authenticated(hci_con_handle_t con_handle){ 5573 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5574 if (hci_connection == NULL) return 0; 5575 5576 switch (hci_connection->address_type){ 5577 case BD_ADDR_TYPE_LE_PUBLIC: 5578 case BD_ADDR_TYPE_LE_RANDOM: 5579 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5580 return hci_connection->sm_connection.sm_connection_authenticated; 5581 #ifdef ENABLE_CLASSIC 5582 case BD_ADDR_TYPE_SCO: 5583 case BD_ADDR_TYPE_ACL: 5584 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5585 #endif 5586 default: 5587 return 0; 5588 } 5589 } 5590 5591 int gap_secure_connection(hci_con_handle_t con_handle){ 5592 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5593 if (hci_connection == NULL) return 0; 5594 5595 switch (hci_connection->address_type){ 5596 case BD_ADDR_TYPE_LE_PUBLIC: 5597 case BD_ADDR_TYPE_LE_RANDOM: 5598 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5599 return hci_connection->sm_connection.sm_connection_sc; 5600 #ifdef ENABLE_CLASSIC 5601 case BD_ADDR_TYPE_SCO: 5602 case BD_ADDR_TYPE_ACL: 5603 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5604 #endif 5605 default: 5606 return 0; 5607 } 5608 } 5609 5610 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5611 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5612 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5613 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5614 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5615 return sm_conn->sm_connection_authorization_state; 5616 } 5617 #endif 5618 5619 #ifdef ENABLE_CLASSIC 5620 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){ 5621 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5622 if (!conn) return GAP_CONNECTION_INVALID; 5623 conn->sniff_min_interval = sniff_min_interval; 5624 conn->sniff_max_interval = sniff_max_interval; 5625 conn->sniff_attempt = sniff_attempt; 5626 conn->sniff_timeout = sniff_timeout; 5627 hci_run(); 5628 return 0; 5629 } 5630 5631 /** 5632 * @brief Exit Sniff mode 5633 * @param con_handle 5634 @ @return 0 if ok 5635 */ 5636 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5637 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5638 if (!conn) return GAP_CONNECTION_INVALID; 5639 conn->sniff_min_interval = 0xffff; 5640 hci_run(); 5641 return 0; 5642 } 5643 #endif 5644 5645 void hci_halting_defer(void){ 5646 if (hci_stack->state != HCI_STATE_HALTING) return; 5647 switch (hci_stack->substate){ 5648 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5649 case HCI_HALTING_CLOSE: 5650 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5651 break; 5652 default: 5653 break; 5654 } 5655 } 5656 5657 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5658 void hci_setup_test_connections_fuzz(void){ 5659 hci_connection_t * conn; 5660 5661 // default address: 66:55:44:33:00:01 5662 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5663 5664 // setup Controller info 5665 hci_stack->num_cmd_packets = 255; 5666 hci_stack->acl_packets_total_num = 255; 5667 5668 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5669 addr[5] = 0x01; 5670 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5671 conn->con_handle = addr[5]; 5672 conn->role = HCI_ROLE_SLAVE; 5673 conn->state = RECEIVED_CONNECTION_REQUEST; 5674 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5675 5676 // setup incoming Classic SCO connection with con handle 0x0002 5677 addr[5] = 0x02; 5678 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5679 conn->con_handle = addr[5]; 5680 conn->role = HCI_ROLE_SLAVE; 5681 conn->state = RECEIVED_CONNECTION_REQUEST; 5682 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5683 5684 // setup ready Classic ACL connection with con handle 0x0003 5685 addr[5] = 0x03; 5686 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5687 conn->con_handle = addr[5]; 5688 conn->role = HCI_ROLE_SLAVE; 5689 conn->state = OPEN; 5690 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5691 5692 // setup ready Classic SCO connection with con handle 0x0004 5693 addr[5] = 0x04; 5694 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5695 conn->con_handle = addr[5]; 5696 conn->role = HCI_ROLE_SLAVE; 5697 conn->state = OPEN; 5698 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5699 5700 // setup ready LE ACL connection with con handle 0x005 and public address 5701 addr[5] = 0x05; 5702 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5703 conn->con_handle = addr[5]; 5704 conn->role = HCI_ROLE_SLAVE; 5705 conn->state = OPEN; 5706 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5707 } 5708 5709 void hci_free_connections_fuzz(void){ 5710 btstack_linked_list_iterator_t it; 5711 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5712 while (btstack_linked_list_iterator_has_next(&it)){ 5713 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5714 btstack_linked_list_iterator_remove(&it); 5715 btstack_memory_hci_connection_free(con); 5716 } 5717 } 5718 void hci_simulate_working_fuzz(void){ 5719 hci_init_done(); 5720 hci_stack->num_cmd_packets = 255; 5721 } 5722 #endif 5723