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 <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 98 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 99 #define HCI_RESET_RESEND_TIMEOUT_MS 200 100 #endif 101 102 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 103 #ifndef GAP_INQUIRY_MAX_NAME_LEN 104 #define GAP_INQUIRY_MAX_NAME_LEN 32 105 #endif 106 107 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 108 #define GAP_INQUIRY_DURATION_MIN 0x01 109 #define GAP_INQUIRY_DURATION_MAX 0x30 110 #define GAP_INQUIRY_STATE_ACTIVE 0x80 111 #define GAP_INQUIRY_STATE_IDLE 0 112 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 113 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 114 115 // GAP Remote Name Request 116 #define GAP_REMOTE_NAME_STATE_IDLE 0 117 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 118 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 119 120 // GAP Pairing 121 #define GAP_PAIRING_STATE_IDLE 0 122 #define GAP_PAIRING_STATE_SEND_PIN 1 123 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 124 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 125 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 126 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 127 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 128 129 130 // prototypes 131 #ifdef ENABLE_CLASSIC 132 static void hci_update_scan_enable(void); 133 static void hci_emit_discoverable_enabled(uint8_t enabled); 134 static int hci_local_ssp_activated(void); 135 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 136 static bool hci_ssp_supported(hci_connection_t * connection); 137 static void hci_notify_if_sco_can_send_now(void); 138 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 139 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 140 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 141 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 142 static void hci_connection_timestamp(hci_connection_t *connection); 143 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 144 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 145 #endif 146 147 static int hci_power_control_on(void); 148 static void hci_power_control_off(void); 149 static void hci_state_reset(void); 150 static void hci_emit_transport_packet_sent(void); 151 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 152 static void hci_emit_nr_connections_changed(void); 153 static void hci_emit_hci_open_failed(void); 154 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 155 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 156 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 157 static void hci_run(void); 158 static int hci_is_le_connection(hci_connection_t * connection); 159 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 160 161 #ifdef ENABLE_CLASSIC 162 static int hci_have_usb_transport(void); 163 #endif 164 165 #ifdef ENABLE_BLE 166 #ifdef ENABLE_LE_CENTRAL 167 // called from test/ble_client/advertising_data_parser.c 168 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 169 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 170 static hci_connection_t * gap_get_outgoing_connection(void); 171 #endif 172 #endif 173 174 // the STACK is here 175 #ifndef HAVE_MALLOC 176 static hci_stack_t hci_stack_static; 177 #endif 178 static hci_stack_t * hci_stack = NULL; 179 180 #ifdef ENABLE_CLASSIC 181 // default name 182 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 183 184 // test helper 185 static uint8_t disable_l2cap_timeouts = 0; 186 #endif 187 188 /** 189 * create connection for given address 190 * 191 * @return connection OR NULL, if no memory left 192 */ 193 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 194 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 195 hci_connection_t * conn = btstack_memory_hci_connection_get(); 196 if (!conn) return NULL; 197 bd_addr_copy(conn->address, addr); 198 conn->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 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 205 btstack_run_loop_set_timer_context(&conn->timeout, conn); 206 hci_connection_timestamp(conn); 207 #endif 208 conn->acl_recombination_length = 0; 209 conn->acl_recombination_pos = 0; 210 conn->num_packets_sent = 0; 211 212 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 213 #ifdef ENABLE_BLE 214 conn->le_phy_update_all_phys = 0xff; 215 #endif 216 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 217 conn->le_max_tx_octets = 27; 218 #endif 219 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 220 return conn; 221 } 222 223 224 /** 225 * get le connection parameter range 226 * 227 * @return le connection parameter range struct 228 */ 229 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 230 *range = hci_stack->le_connection_parameter_range; 231 } 232 233 /** 234 * set le connection parameter range 235 * 236 */ 237 238 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 239 hci_stack->le_connection_parameter_range = *range; 240 } 241 242 /** 243 * @brief Test if connection parameters are inside in existing rage 244 * @param conn_interval_min (unit: 1.25ms) 245 * @param conn_interval_max (unit: 1.25ms) 246 * @param conn_latency 247 * @param supervision_timeout (unit: 10ms) 248 * @returns 1 if included 249 */ 250 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){ 251 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 252 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 253 254 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 255 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 256 257 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 258 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 259 260 return 1; 261 } 262 263 /** 264 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 265 * @note: default: 1 266 * @param max_peripheral_connections 267 */ 268 #ifdef ENABLE_LE_PERIPHERAL 269 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 270 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 271 } 272 #endif 273 274 /** 275 * get hci connections iterator 276 * 277 * @return hci connections iterator 278 */ 279 280 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 281 btstack_linked_list_iterator_init(it, &hci_stack->connections); 282 } 283 284 /** 285 * get connection for a given handle 286 * 287 * @return connection OR NULL, if not found 288 */ 289 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 290 btstack_linked_list_iterator_t it; 291 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 292 while (btstack_linked_list_iterator_has_next(&it)){ 293 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 294 if ( item->con_handle == con_handle ) { 295 return item; 296 } 297 } 298 return NULL; 299 } 300 301 /** 302 * get connection for given address 303 * 304 * @return connection OR NULL, if not found 305 */ 306 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 307 btstack_linked_list_iterator_t it; 308 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 309 while (btstack_linked_list_iterator_has_next(&it)){ 310 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 311 if (connection->address_type != addr_type) continue; 312 if (memcmp(addr, connection->address, 6) != 0) continue; 313 return connection; 314 } 315 return NULL; 316 } 317 318 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 319 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 320 } 321 322 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 323 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 324 } 325 326 #ifdef ENABLE_CLASSIC 327 328 #ifdef ENABLE_SCO_OVER_HCI 329 static int hci_number_sco_connections(void){ 330 int connections = 0; 331 btstack_linked_list_iterator_t it; 332 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 333 while (btstack_linked_list_iterator_has_next(&it)){ 334 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 335 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 336 connections++; 337 } 338 return connections; 339 } 340 #endif 341 342 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 343 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 344 #ifdef HAVE_EMBEDDED_TICK 345 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 346 // connections might be timed out 347 hci_emit_l2cap_check_timeout(connection); 348 } 349 #else 350 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 351 // connections might be timed out 352 hci_emit_l2cap_check_timeout(connection); 353 } 354 #endif 355 } 356 357 static void hci_connection_timestamp(hci_connection_t *connection){ 358 #ifdef HAVE_EMBEDDED_TICK 359 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 360 #else 361 connection->timestamp = btstack_run_loop_get_time_ms(); 362 #endif 363 } 364 365 /** 366 * add authentication flags and reset timer 367 * @note: assumes classic connection 368 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 369 */ 370 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 371 bd_addr_t addr; 372 reverse_bd_addr(bd_addr, addr); 373 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 374 if (conn) { 375 connectionSetAuthenticationFlags(conn, flags); 376 hci_connection_timestamp(conn); 377 } 378 } 379 380 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 381 hci_connection_t * conn = hci_connection_for_handle(handle); 382 if (!conn) return 0; 383 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 384 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 385 return 0; 386 } 387 388 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 389 if (!hci_stack->link_key_db) return; 390 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 391 hci_stack->link_key_db->delete_link_key(addr); 392 } 393 394 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 395 if (!hci_stack->link_key_db) return; 396 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 397 hci_stack->link_key_db->put_link_key(addr, link_key, type); 398 } 399 400 void gap_delete_all_link_keys(void){ 401 bd_addr_t addr; 402 link_key_t link_key; 403 link_key_type_t type; 404 btstack_link_key_iterator_t it; 405 int ok = gap_link_key_iterator_init(&it); 406 if (!ok) { 407 log_error("could not initialize iterator"); 408 return; 409 } 410 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 411 gap_drop_link_key_for_bd_addr(addr); 412 } 413 gap_link_key_iterator_done(&it); 414 } 415 416 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 417 if (!hci_stack->link_key_db) return 0; 418 if (!hci_stack->link_key_db->iterator_init) return 0; 419 return hci_stack->link_key_db->iterator_init(it); 420 } 421 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){ 422 if (!hci_stack->link_key_db) return 0; 423 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 424 } 425 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 426 if (!hci_stack->link_key_db) return; 427 hci_stack->link_key_db->iterator_done(it); 428 } 429 #endif 430 431 static int hci_is_le_connection(hci_connection_t * connection){ 432 switch (connection->address_type){ 433 case BD_ADDR_TYPE_LE_PUBLIC: 434 case BD_ADDR_TYPE_LE_RANDOM: 435 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 436 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 437 return 1; 438 default: 439 return 0; 440 } 441 } 442 443 /** 444 * count connections 445 */ 446 static int nr_hci_connections(void){ 447 int count = 0; 448 btstack_linked_item_t *it; 449 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 450 count++; 451 } 452 return count; 453 } 454 455 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 456 457 unsigned int num_packets_sent_classic = 0; 458 unsigned int num_packets_sent_le = 0; 459 460 btstack_linked_item_t *it; 461 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 462 hci_connection_t * connection = (hci_connection_t *) it; 463 if (hci_is_le_connection(connection)){ 464 num_packets_sent_le += connection->num_packets_sent; 465 } 466 if (connection->address_type == BD_ADDR_TYPE_ACL){ 467 num_packets_sent_classic += connection->num_packets_sent; 468 } 469 } 470 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 471 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 472 int free_slots_le = 0; 473 474 if (free_slots_classic < 0){ 475 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); 476 return 0; 477 } 478 479 if (hci_stack->le_acl_packets_total_num){ 480 // if we have LE slots, they are used 481 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 482 if (free_slots_le < 0){ 483 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); 484 return 0; 485 } 486 } else { 487 // otherwise, classic slots are used for LE, too 488 free_slots_classic -= num_packets_sent_le; 489 if (free_slots_classic < 0){ 490 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); 491 return 0; 492 } 493 } 494 495 switch (address_type){ 496 case BD_ADDR_TYPE_UNKNOWN: 497 log_error("hci_number_free_acl_slots: unknown address type"); 498 return 0; 499 500 case BD_ADDR_TYPE_ACL: 501 return free_slots_classic; 502 503 default: 504 if (hci_stack->le_acl_packets_total_num){ 505 return free_slots_le; 506 } 507 return free_slots_classic; 508 } 509 } 510 511 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 512 // get connection type 513 hci_connection_t * connection = hci_connection_for_handle(con_handle); 514 if (!connection){ 515 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 516 return 0; 517 } 518 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 519 } 520 521 #ifdef ENABLE_CLASSIC 522 static int hci_number_free_sco_slots(void){ 523 unsigned int num_sco_packets_sent = 0; 524 btstack_linked_item_t *it; 525 if (hci_stack->synchronous_flow_control_enabled){ 526 // explicit flow control 527 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 528 hci_connection_t * connection = (hci_connection_t *) it; 529 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 530 num_sco_packets_sent += connection->num_packets_sent; 531 } 532 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 533 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 534 return 0; 535 } 536 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 537 } else { 538 // implicit flow control -- TODO 539 int num_ready = 0; 540 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 541 hci_connection_t * connection = (hci_connection_t *) it; 542 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 543 if (connection->sco_tx_ready == 0) continue; 544 num_ready++; 545 } 546 return num_ready; 547 } 548 } 549 #endif 550 551 // only used to send HCI Host Number Completed Packets 552 static int hci_can_send_comand_packet_transport(void){ 553 if (hci_stack->hci_packet_buffer_reserved) return 0; 554 555 // check for async hci transport implementations 556 if (hci_stack->hci_transport->can_send_packet_now){ 557 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 558 return 0; 559 } 560 } 561 return 1; 562 } 563 564 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 565 int hci_can_send_command_packet_now(void){ 566 if (hci_can_send_comand_packet_transport() == 0) return 0; 567 return hci_stack->num_cmd_packets > 0; 568 } 569 570 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 571 // check for async hci transport implementations 572 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 573 return hci_stack->hci_transport->can_send_packet_now(packet_type); 574 } 575 576 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 577 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 578 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 579 } 580 581 int hci_can_send_acl_le_packet_now(void){ 582 if (hci_stack->hci_packet_buffer_reserved) return 0; 583 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 584 } 585 586 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 587 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 588 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 589 } 590 591 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 592 if (hci_stack->hci_packet_buffer_reserved) return 0; 593 return hci_can_send_prepared_acl_packet_now(con_handle); 594 } 595 596 #ifdef ENABLE_CLASSIC 597 int hci_can_send_acl_classic_packet_now(void){ 598 if (hci_stack->hci_packet_buffer_reserved) return 0; 599 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 600 } 601 602 int hci_can_send_prepared_sco_packet_now(void){ 603 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 604 if (hci_have_usb_transport()){ 605 return hci_stack->sco_can_send_now; 606 } else { 607 return hci_number_free_sco_slots() > 0; 608 } 609 } 610 611 int hci_can_send_sco_packet_now(void){ 612 if (hci_stack->hci_packet_buffer_reserved) return 0; 613 return hci_can_send_prepared_sco_packet_now(); 614 } 615 616 void hci_request_sco_can_send_now_event(void){ 617 hci_stack->sco_waiting_for_can_send_now = 1; 618 hci_notify_if_sco_can_send_now(); 619 } 620 #endif 621 622 // used for internal checks in l2cap.c 623 int hci_is_packet_buffer_reserved(void){ 624 return hci_stack->hci_packet_buffer_reserved; 625 } 626 627 // reserves outgoing packet buffer. @returns 1 if successful 628 int hci_reserve_packet_buffer(void){ 629 if (hci_stack->hci_packet_buffer_reserved) { 630 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 631 return 0; 632 } 633 hci_stack->hci_packet_buffer_reserved = 1; 634 return 1; 635 } 636 637 void hci_release_packet_buffer(void){ 638 hci_stack->hci_packet_buffer_reserved = 0; 639 } 640 641 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 642 static int hci_transport_synchronous(void){ 643 return hci_stack->hci_transport->can_send_packet_now == NULL; 644 } 645 646 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 647 648 // 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); 649 650 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 651 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 652 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0)){ 653 max_acl_data_packet_length = hci_stack->le_data_packets_length; 654 } 655 656 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 657 if (hci_is_le_connection(connection)){ 658 max_acl_data_packet_length = connection->le_max_tx_octets; 659 } 660 #endif 661 662 log_debug("hci_send_acl_packet_fragments entered"); 663 664 int err; 665 // multiple packets could be send on a synchronous HCI transport 666 while (true){ 667 668 log_debug("hci_send_acl_packet_fragments loop entered"); 669 670 // get current data 671 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 672 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 673 int more_fragments = 0; 674 675 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 676 if (current_acl_data_packet_length > max_acl_data_packet_length){ 677 more_fragments = 1; 678 current_acl_data_packet_length = max_acl_data_packet_length; 679 } 680 681 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 682 if (acl_header_pos > 0){ 683 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 684 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 685 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 686 } 687 688 // update header len 689 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 690 691 // count packet 692 connection->num_packets_sent++; 693 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 694 695 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 696 if (more_fragments){ 697 // update start of next fragment to send 698 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 699 } else { 700 // done 701 hci_stack->acl_fragmentation_pos = 0; 702 hci_stack->acl_fragmentation_total_size = 0; 703 } 704 705 // send packet 706 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 707 const int size = current_acl_data_packet_length + 4; 708 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 709 hci_stack->acl_fragmentation_tx_active = 1; 710 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 711 712 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 713 714 // done yet? 715 if (!more_fragments) break; 716 717 // can send more? 718 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 719 } 720 721 log_debug("hci_send_acl_packet_fragments loop over"); 722 723 // release buffer now for synchronous transport 724 if (hci_transport_synchronous()){ 725 hci_stack->acl_fragmentation_tx_active = 0; 726 hci_release_packet_buffer(); 727 hci_emit_transport_packet_sent(); 728 } 729 730 return err; 731 } 732 733 // pre: caller has reserved the packet buffer 734 int hci_send_acl_packet_buffer(int size){ 735 736 // log_info("hci_send_acl_packet_buffer size %u", size); 737 738 if (!hci_stack->hci_packet_buffer_reserved) { 739 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 740 return 0; 741 } 742 743 uint8_t * packet = hci_stack->hci_packet_buffer; 744 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 745 746 // check for free places on Bluetooth module 747 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 748 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 749 hci_release_packet_buffer(); 750 hci_emit_transport_packet_sent(); 751 return BTSTACK_ACL_BUFFERS_FULL; 752 } 753 754 hci_connection_t *connection = hci_connection_for_handle( con_handle); 755 if (!connection) { 756 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 757 hci_release_packet_buffer(); 758 hci_emit_transport_packet_sent(); 759 return 0; 760 } 761 762 #ifdef ENABLE_CLASSIC 763 hci_connection_timestamp(connection); 764 #endif 765 766 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 767 768 // setup data 769 hci_stack->acl_fragmentation_total_size = size; 770 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 771 772 return hci_send_acl_packet_fragments(connection); 773 } 774 775 #ifdef ENABLE_CLASSIC 776 // pre: caller has reserved the packet buffer 777 int hci_send_sco_packet_buffer(int size){ 778 779 // log_info("hci_send_acl_packet_buffer size %u", size); 780 781 if (!hci_stack->hci_packet_buffer_reserved) { 782 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 783 return 0; 784 } 785 786 uint8_t * packet = hci_stack->hci_packet_buffer; 787 788 // skip checks in loopback mode 789 if (!hci_stack->loopback_mode){ 790 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 791 792 // check for free places on Bluetooth module 793 if (!hci_can_send_prepared_sco_packet_now()) { 794 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 795 hci_release_packet_buffer(); 796 hci_emit_transport_packet_sent(); 797 return BTSTACK_ACL_BUFFERS_FULL; 798 } 799 800 // track send packet in connection struct 801 hci_connection_t *connection = hci_connection_for_handle( con_handle); 802 if (!connection) { 803 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 804 hci_release_packet_buffer(); 805 hci_emit_transport_packet_sent(); 806 return 0; 807 } 808 809 if (hci_have_usb_transport()){ 810 // token used 811 hci_stack->sco_can_send_now = 0; 812 } else { 813 if (hci_stack->synchronous_flow_control_enabled){ 814 connection->num_packets_sent++; 815 } else { 816 connection->sco_tx_ready--; 817 } 818 } 819 } 820 821 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 822 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 823 824 if (hci_transport_synchronous()){ 825 hci_release_packet_buffer(); 826 hci_emit_transport_packet_sent(); 827 } 828 829 return err; 830 } 831 #endif 832 833 static void acl_handler(uint8_t *packet, int size){ 834 835 // log_info("acl_handler: size %u", size); 836 837 // get info 838 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 839 hci_connection_t *conn = hci_connection_for_handle(con_handle); 840 uint8_t acl_flags = READ_ACL_FLAGS(packet); 841 uint16_t acl_length = READ_ACL_LENGTH(packet); 842 843 // ignore non-registered handle 844 if (!conn){ 845 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 846 return; 847 } 848 849 // assert packet is complete 850 if ((acl_length + 4) != size){ 851 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 852 return; 853 } 854 855 #ifdef ENABLE_CLASSIC 856 // update idle timestamp 857 hci_connection_timestamp(conn); 858 #endif 859 860 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 861 hci_stack->host_completed_packets = 1; 862 conn->num_packets_completed++; 863 #endif 864 865 // handle different packet types 866 switch (acl_flags & 0x03) { 867 868 case 0x01: // continuation fragment 869 870 // sanity checks 871 if (conn->acl_recombination_pos == 0) { 872 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 873 return; 874 } 875 if ((conn->acl_recombination_pos + acl_length) > (4 + HCI_ACL_BUFFER_SIZE)){ 876 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 877 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 878 conn->acl_recombination_pos = 0; 879 return; 880 } 881 882 // append fragment payload (header already stored) 883 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 884 &packet[4], acl_length); 885 conn->acl_recombination_pos += acl_length; 886 887 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 888 // conn->acl_recombination_pos, conn->acl_recombination_length); 889 890 // forward complete L2CAP packet if complete. 891 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4 + 4)){ // pos already incl. ACL header 892 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 893 // reset recombination buffer 894 conn->acl_recombination_length = 0; 895 conn->acl_recombination_pos = 0; 896 } 897 break; 898 899 case 0x02: { // first fragment 900 901 // sanity check 902 if (conn->acl_recombination_pos) { 903 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 904 conn->acl_recombination_pos = 0; 905 } 906 907 // peek into L2CAP packet! 908 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 909 910 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 911 912 // compare fragment size to L2CAP packet size 913 if (acl_length >= (l2cap_length + 4)){ 914 // forward fragment as L2CAP packet 915 hci_emit_acl_packet(packet, acl_length + 4); 916 } else { 917 918 if (acl_length > HCI_ACL_BUFFER_SIZE){ 919 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 920 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 921 return; 922 } 923 924 // store first fragment and tweak acl length for complete package 925 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 926 packet, acl_length + 4); 927 conn->acl_recombination_pos = acl_length + 4; 928 conn->acl_recombination_length = l2cap_length; 929 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 930 } 931 break; 932 933 } 934 default: 935 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 936 return; 937 } 938 939 // execute main loop 940 hci_run(); 941 } 942 943 static void hci_shutdown_connection(hci_connection_t *conn){ 944 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 945 946 #ifdef ENABLE_CLASSIC 947 #ifdef ENABLE_SCO_OVER_HCI 948 int addr_type = conn->address_type; 949 #endif 950 #endif 951 952 btstack_run_loop_remove_timer(&conn->timeout); 953 954 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 955 btstack_memory_hci_connection_free( conn ); 956 957 // now it's gone 958 hci_emit_nr_connections_changed(); 959 960 #ifdef ENABLE_CLASSIC 961 #ifdef ENABLE_SCO_OVER_HCI 962 // update SCO 963 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 964 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 965 } 966 #endif 967 #endif 968 } 969 970 #ifdef ENABLE_CLASSIC 971 972 static const uint16_t packet_type_sizes[] = { 973 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 974 HCI_ACL_DH1_SIZE, 0, 0, 0, 975 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 976 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 977 }; 978 static const uint8_t packet_type_feature_requirement_bit[] = { 979 0, // 3 slot packets 980 1, // 5 slot packets 981 25, // EDR 2 mpbs 982 26, // EDR 3 mbps 983 39, // 3 slot EDR packts 984 40, // 5 slot EDR packet 985 }; 986 static const uint16_t packet_type_feature_packet_mask[] = { 987 0x0f00, // 3 slot packets 988 0xf000, // 5 slot packets 989 0x1102, // EDR 2 mpbs 990 0x2204, // EDR 3 mbps 991 0x0300, // 3 slot EDR packts 992 0x3000, // 5 slot EDR packet 993 }; 994 995 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 996 // enable packet types based on size 997 uint16_t packet_types = 0; 998 unsigned int i; 999 for (i=0;i<16;i++){ 1000 if (packet_type_sizes[i] == 0) continue; 1001 if (packet_type_sizes[i] <= buffer_size){ 1002 packet_types |= 1 << i; 1003 } 1004 } 1005 // disable packet types due to missing local supported features 1006 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1007 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1008 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1009 if (feature_set) continue; 1010 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1011 packet_types &= ~packet_type_feature_packet_mask[i]; 1012 } 1013 // flip bits for "may not be used" 1014 packet_types ^= 0x3306; 1015 return packet_types; 1016 } 1017 1018 uint16_t hci_usable_acl_packet_types(void){ 1019 return hci_stack->packet_types; 1020 } 1021 #endif 1022 1023 uint8_t* hci_get_outgoing_packet_buffer(void){ 1024 // hci packet buffer is >= acl data packet length 1025 return hci_stack->hci_packet_buffer; 1026 } 1027 1028 uint16_t hci_max_acl_data_packet_length(void){ 1029 return hci_stack->acl_data_packet_length; 1030 } 1031 1032 #ifdef ENABLE_CLASSIC 1033 int hci_extended_sco_link_supported(void){ 1034 // No. 31, byte 3, bit 7 1035 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1036 } 1037 #endif 1038 1039 int hci_non_flushable_packet_boundary_flag_supported(void){ 1040 // No. 54, byte 6, bit 6 1041 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1042 } 1043 1044 static int gap_ssp_supported(void){ 1045 // No. 51, byte 6, bit 3 1046 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1047 } 1048 1049 static int hci_classic_supported(void){ 1050 #ifdef ENABLE_CLASSIC 1051 // No. 37, byte 4, bit 5, = No BR/EDR Support 1052 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1053 #else 1054 return 0; 1055 #endif 1056 } 1057 1058 static int hci_le_supported(void){ 1059 #ifdef ENABLE_BLE 1060 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1061 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1062 #else 1063 return 0; 1064 #endif 1065 } 1066 1067 #ifdef ENABLE_BLE 1068 1069 /** 1070 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1071 */ 1072 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1073 *addr_type = hci_stack->le_own_addr_type; 1074 if (hci_stack->le_own_addr_type){ 1075 (void)memcpy(addr, hci_stack->le_random_address, 6); 1076 } else { 1077 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1078 } 1079 } 1080 1081 #ifdef ENABLE_LE_CENTRAL 1082 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1083 1084 int offset = 3; 1085 int num_reports = packet[offset]; 1086 offset += 1; 1087 1088 int i; 1089 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1090 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1091 for (i=0; (i<num_reports) && (offset < size);i++){ 1092 // sanity checks on data_length: 1093 uint8_t data_length = packet[offset + 8]; 1094 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1095 if ((offset + 9 + data_length + 1) > size) return; 1096 // setup event 1097 uint8_t event_size = 10 + data_length; 1098 int pos = 0; 1099 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1100 event[pos++] = event_size; 1101 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1102 offset += 8; 1103 pos += 8; 1104 event[pos++] = packet[offset + 1 + data_length]; // rssi 1105 event[pos++] = data_length; 1106 offset++; 1107 (void)memcpy(&event[pos], &packet[offset], data_length); 1108 pos += data_length; 1109 offset += data_length + 1; // rssi 1110 hci_emit_event(event, pos, 1); 1111 } 1112 } 1113 #endif 1114 #endif 1115 1116 #ifdef ENABLE_BLE 1117 #ifdef ENABLE_LE_PERIPHERAL 1118 static void hci_reenable_advertisements_if_needed(void){ 1119 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1120 // get number of active le slave connections 1121 int num_slave_connections = 0; 1122 btstack_linked_list_iterator_t it; 1123 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1124 while (btstack_linked_list_iterator_has_next(&it)){ 1125 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1126 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1127 if (con->state != OPEN) continue; 1128 if (con->role != HCI_ROLE_SLAVE) continue; 1129 if (!hci_is_le_connection(con)) continue; 1130 num_slave_connections++; 1131 } 1132 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1133 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1134 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1135 } 1136 } 1137 } 1138 #endif 1139 #endif 1140 1141 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1142 1143 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1144 if (!hci_stack->config) return 0; 1145 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1146 // Limit baud rate for Broadcom chipsets to 3 mbps 1147 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1148 baud_rate = 3000000; 1149 } 1150 return baud_rate; 1151 } 1152 1153 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1154 UNUSED(ds); 1155 1156 switch (hci_stack->substate){ 1157 case HCI_INIT_W4_SEND_RESET: 1158 log_info("Resend HCI Reset"); 1159 hci_stack->substate = HCI_INIT_SEND_RESET; 1160 hci_stack->num_cmd_packets = 1; 1161 hci_run(); 1162 break; 1163 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1164 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1165 if (hci_stack->hci_transport->reset_link){ 1166 hci_stack->hci_transport->reset_link(); 1167 } 1168 1169 /* fall through */ 1170 1171 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1172 log_info("Resend HCI Reset - CSR Warm Boot"); 1173 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1174 hci_stack->num_cmd_packets = 1; 1175 hci_run(); 1176 break; 1177 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1178 if (hci_stack->hci_transport->set_baudrate){ 1179 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1180 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1181 hci_stack->hci_transport->set_baudrate(baud_rate); 1182 } 1183 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1184 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1185 if (hci_stack->hci_transport->reset_link){ 1186 log_info("Link Reset"); 1187 hci_stack->hci_transport->reset_link(); 1188 } 1189 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1190 hci_run(); 1191 } 1192 break; 1193 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1194 // otherwise continue 1195 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1196 hci_send_cmd(&hci_read_local_supported_commands); 1197 break; 1198 default: 1199 break; 1200 } 1201 } 1202 #endif 1203 1204 static void hci_initializing_next_state(void){ 1205 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1206 } 1207 1208 // assumption: hci_can_send_command_packet_now() == true 1209 static void hci_initializing_run(void){ 1210 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1211 switch (hci_stack->substate){ 1212 case HCI_INIT_SEND_RESET: 1213 hci_state_reset(); 1214 1215 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1216 // prepare reset if command complete not received in 100ms 1217 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1218 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1219 btstack_run_loop_add_timer(&hci_stack->timeout); 1220 #endif 1221 // send command 1222 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1223 hci_send_cmd(&hci_reset); 1224 break; 1225 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1226 hci_send_cmd(&hci_read_local_version_information); 1227 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1228 break; 1229 case HCI_INIT_SEND_READ_LOCAL_NAME: 1230 hci_send_cmd(&hci_read_local_name); 1231 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1232 break; 1233 1234 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1235 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1236 hci_state_reset(); 1237 // prepare reset if command complete not received in 100ms 1238 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1239 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1240 btstack_run_loop_add_timer(&hci_stack->timeout); 1241 // send command 1242 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1243 hci_send_cmd(&hci_reset); 1244 break; 1245 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1246 hci_state_reset(); 1247 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1248 hci_send_cmd(&hci_reset); 1249 break; 1250 case HCI_INIT_SEND_BAUD_CHANGE: { 1251 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1252 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1253 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1254 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1255 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1256 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1257 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1258 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1259 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1260 btstack_run_loop_add_timer(&hci_stack->timeout); 1261 } 1262 break; 1263 } 1264 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1265 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1266 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1267 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1268 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1269 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1270 break; 1271 } 1272 case HCI_INIT_CUSTOM_INIT: 1273 // Custom initialization 1274 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1275 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1276 int send_cmd = 0; 1277 switch (hci_stack->chipset_result){ 1278 case BTSTACK_CHIPSET_VALID_COMMAND: 1279 send_cmd = 1; 1280 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1281 break; 1282 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1283 send_cmd = 1; 1284 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1285 log_info("CSR Warm Boot"); 1286 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1287 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1288 btstack_run_loop_add_timer(&hci_stack->timeout); 1289 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1290 && hci_stack->config 1291 && hci_stack->chipset 1292 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1293 && hci_stack->hci_transport->set_baudrate 1294 && hci_transport_uart_get_main_baud_rate()){ 1295 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1296 } else { 1297 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1298 } 1299 break; 1300 default: 1301 break; 1302 } 1303 1304 if (send_cmd){ 1305 int size = 3 + hci_stack->hci_packet_buffer[2]; 1306 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1307 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1308 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1309 break; 1310 } 1311 log_info("Init script done"); 1312 1313 // Init script download on Broadcom chipsets causes: 1314 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1315 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1316 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1317 1318 // - baud rate to reset, restore UART baud rate if needed 1319 int need_baud_change = hci_stack->config 1320 && hci_stack->chipset 1321 && hci_stack->chipset->set_baudrate_command 1322 && hci_stack->hci_transport->set_baudrate 1323 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1324 if (need_baud_change) { 1325 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1326 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1327 hci_stack->hci_transport->set_baudrate(baud_rate); 1328 } 1329 1330 uint16_t bcm_delay_ms = 300; 1331 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1332 // -> Work around: wait here. 1333 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1334 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1335 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1336 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1337 btstack_run_loop_add_timer(&hci_stack->timeout); 1338 break; 1339 } 1340 } 1341 // otherwise continue 1342 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1343 hci_send_cmd(&hci_read_local_supported_commands); 1344 break; 1345 case HCI_INIT_SET_BD_ADDR: 1346 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1347 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1348 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1349 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1350 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1351 break; 1352 #endif 1353 1354 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1355 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1356 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1357 hci_send_cmd(&hci_read_local_supported_commands); 1358 break; 1359 case HCI_INIT_READ_BD_ADDR: 1360 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1361 hci_send_cmd(&hci_read_bd_addr); 1362 break; 1363 case HCI_INIT_READ_BUFFER_SIZE: 1364 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1365 hci_send_cmd(&hci_read_buffer_size); 1366 break; 1367 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1368 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1369 hci_send_cmd(&hci_read_local_supported_features); 1370 break; 1371 1372 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1373 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1374 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1375 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1376 break; 1377 case HCI_INIT_HOST_BUFFER_SIZE: 1378 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1379 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1380 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1381 break; 1382 #endif 1383 1384 case HCI_INIT_SET_EVENT_MASK: 1385 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1386 if (hci_le_supported()){ 1387 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1388 } else { 1389 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1390 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1391 } 1392 break; 1393 1394 #ifdef ENABLE_CLASSIC 1395 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1396 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1397 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1398 break; 1399 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1400 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1401 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1402 break; 1403 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1404 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1405 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1406 break; 1407 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1408 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1409 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1410 break; 1411 case HCI_INIT_WRITE_LOCAL_NAME: { 1412 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1413 hci_reserve_packet_buffer(); 1414 uint8_t * packet = hci_stack->hci_packet_buffer; 1415 // construct HCI Command and send 1416 uint16_t opcode = hci_write_local_name.opcode; 1417 hci_stack->last_cmd_opcode = opcode; 1418 packet[0] = opcode & 0xff; 1419 packet[1] = opcode >> 8; 1420 packet[2] = DEVICE_NAME_LEN; 1421 memset(&packet[3], 0, DEVICE_NAME_LEN); 1422 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1423 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1424 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1425 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1426 // expand '00:00:00:00:00:00' in name with bd_addr 1427 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1428 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1429 break; 1430 } 1431 case HCI_INIT_WRITE_EIR_DATA: { 1432 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1433 hci_reserve_packet_buffer(); 1434 uint8_t * packet = hci_stack->hci_packet_buffer; 1435 // construct HCI Command in-place and send 1436 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1437 hci_stack->last_cmd_opcode = opcode; 1438 uint16_t offset = 0; 1439 packet[offset++] = opcode & 0xff; 1440 packet[offset++] = opcode >> 8; 1441 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1442 packet[offset++] = 0; // FEC not required 1443 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1444 if (hci_stack->eir_data){ 1445 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1446 ad_context_t context; 1447 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1448 uint8_t data_type = ad_iterator_get_data_type(&context); 1449 uint8_t size = ad_iterator_get_data_len(&context); 1450 const uint8_t *data = ad_iterator_get_data(&context); 1451 // copy item 1452 packet[offset++] = size + 1; 1453 packet[offset++] = data_type; 1454 memcpy(&packet[offset], data, size); 1455 // update name item 1456 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1457 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1458 } 1459 offset += size; 1460 } 1461 } else { 1462 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1463 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1464 packet[offset++] = bytes_to_copy + 1; 1465 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1466 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1467 // expand '00:00:00:00:00:00' in name with bd_addr 1468 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1469 } 1470 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1471 break; 1472 } 1473 case HCI_INIT_WRITE_INQUIRY_MODE: 1474 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1475 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1476 break; 1477 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1478 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1479 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1480 break; 1481 case HCI_INIT_WRITE_SCAN_ENABLE: 1482 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1483 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1484 break; 1485 // only sent if ENABLE_SCO_OVER_HCI is defined 1486 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1487 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1488 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1489 break; 1490 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1491 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1492 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1493 break; 1494 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1495 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1496 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1497 log_info("BCM: Route SCO data via HCI transport"); 1498 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1499 break; 1500 1501 #endif 1502 #ifdef ENABLE_BLE 1503 // LE INIT 1504 case HCI_INIT_LE_READ_BUFFER_SIZE: 1505 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1506 hci_send_cmd(&hci_le_read_buffer_size); 1507 break; 1508 case HCI_INIT_LE_SET_EVENT_MASK: 1509 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1510 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1511 break; 1512 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1513 // LE Supported Host = 1, Simultaneous Host = 0 1514 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1515 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1516 break; 1517 #endif 1518 1519 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1520 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1521 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1522 hci_send_cmd(&hci_le_read_maximum_data_length); 1523 break; 1524 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1525 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1526 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1527 break; 1528 #endif 1529 1530 #ifdef ENABLE_LE_CENTRAL 1531 case HCI_INIT_READ_WHITE_LIST_SIZE: 1532 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1533 hci_send_cmd(&hci_le_read_white_list_size); 1534 break; 1535 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1536 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1537 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1538 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); 1539 break; 1540 #endif 1541 default: 1542 return; 1543 } 1544 } 1545 1546 static void hci_init_done(void){ 1547 // done. tell the app 1548 log_info("hci_init_done -> HCI_STATE_WORKING"); 1549 hci_stack->state = HCI_STATE_WORKING; 1550 hci_emit_state(); 1551 hci_run(); 1552 } 1553 1554 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1555 bool command_completed = false; 1556 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1557 uint16_t opcode = little_endian_read_16(packet,3); 1558 if (opcode == hci_stack->last_cmd_opcode){ 1559 command_completed = true; 1560 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1561 } else { 1562 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1563 } 1564 } 1565 1566 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1567 uint8_t status = packet[2]; 1568 uint16_t opcode = little_endian_read_16(packet,4); 1569 if (opcode == hci_stack->last_cmd_opcode){ 1570 if (status){ 1571 command_completed = true; 1572 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1573 } else { 1574 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1575 } 1576 } else { 1577 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1578 } 1579 } 1580 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1581 // Vendor == CSR 1582 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1583 // TODO: track actual command 1584 command_completed = true; 1585 } 1586 1587 // Vendor == Toshiba 1588 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1589 // TODO: track actual command 1590 command_completed = true; 1591 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1592 hci_stack->num_cmd_packets = 1; 1593 } 1594 #endif 1595 1596 return command_completed; 1597 } 1598 1599 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1600 1601 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1602 1603 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1604 1605 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1606 1607 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1608 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1609 // 1610 // HCI Reset 1611 // Timeout 100 ms 1612 // HCI Reset 1613 // Command Complete Reset 1614 // HCI Read Local Version Information 1615 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1616 // hang... 1617 // 1618 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1619 if (!command_completed 1620 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1621 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1622 1623 uint16_t opcode = little_endian_read_16(packet,3); 1624 if (opcode == hci_reset.opcode){ 1625 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1626 return; 1627 } 1628 } 1629 1630 // CSR & H5 1631 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1632 if (!command_completed 1633 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1634 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1635 1636 uint16_t opcode = little_endian_read_16(packet,3); 1637 if (opcode == hci_reset.opcode){ 1638 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1639 return; 1640 } 1641 } 1642 1643 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1644 // fix: Correct substate and behave as command below 1645 if (command_completed){ 1646 switch (hci_stack->substate){ 1647 case HCI_INIT_SEND_RESET: 1648 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1649 break; 1650 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1651 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1652 break; 1653 default: 1654 break; 1655 } 1656 } 1657 1658 #endif 1659 1660 if (!command_completed) return; 1661 1662 bool need_baud_change = false; 1663 bool need_addr_change = false; 1664 1665 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1666 need_baud_change = hci_stack->config 1667 && hci_stack->chipset 1668 && hci_stack->chipset->set_baudrate_command 1669 && hci_stack->hci_transport->set_baudrate 1670 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1671 1672 need_addr_change = hci_stack->custom_bd_addr_set 1673 && hci_stack->chipset 1674 && hci_stack->chipset->set_bd_addr_command; 1675 #endif 1676 1677 switch(hci_stack->substate){ 1678 1679 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1680 case HCI_INIT_SEND_RESET: 1681 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1682 // fix: just correct substate and behave as command below 1683 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1684 btstack_run_loop_remove_timer(&hci_stack->timeout); 1685 break; 1686 case HCI_INIT_W4_SEND_RESET: 1687 btstack_run_loop_remove_timer(&hci_stack->timeout); 1688 break; 1689 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1690 log_info("Received local name, need baud change %d", (int) need_baud_change); 1691 if (need_baud_change){ 1692 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1693 return; 1694 } 1695 // skip baud change 1696 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1697 return; 1698 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1699 // for STLC2500D, baud rate change already happened. 1700 // for others, baud rate gets changed now 1701 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1702 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1703 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1704 hci_stack->hci_transport->set_baudrate(baud_rate); 1705 } 1706 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1707 return; 1708 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1709 btstack_run_loop_remove_timer(&hci_stack->timeout); 1710 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1711 return; 1712 case HCI_INIT_W4_CUSTOM_INIT: 1713 // repeat custom init 1714 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1715 return; 1716 #else 1717 case HCI_INIT_W4_SEND_RESET: 1718 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1719 return ; 1720 #endif 1721 1722 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1723 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1724 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1725 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1726 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1727 return; 1728 } 1729 if (need_addr_change){ 1730 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1731 return; 1732 } 1733 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1734 return; 1735 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1736 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1737 if (need_baud_change){ 1738 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1739 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1740 hci_stack->hci_transport->set_baudrate(baud_rate); 1741 } 1742 if (need_addr_change){ 1743 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1744 return; 1745 } 1746 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1747 return; 1748 case HCI_INIT_W4_SET_BD_ADDR: 1749 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1750 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1751 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1752 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1753 return; 1754 } 1755 // skipping st warm boot 1756 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1757 return; 1758 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1759 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1760 return; 1761 #endif 1762 case HCI_INIT_W4_READ_BD_ADDR: 1763 // only read buffer size if supported 1764 if (hci_stack->local_supported_commands[0] & 0x01) { 1765 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1766 return; 1767 } 1768 // skipping read buffer size 1769 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1770 return; 1771 case HCI_INIT_W4_SET_EVENT_MASK: 1772 // skip Classic init commands for LE only chipsets 1773 if (!hci_classic_supported()){ 1774 #ifdef ENABLE_BLE 1775 if (hci_le_supported()){ 1776 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1777 return; 1778 } 1779 #endif 1780 log_error("Neither BR/EDR nor LE supported"); 1781 hci_init_done(); 1782 return; 1783 } 1784 if (!gap_ssp_supported()){ 1785 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1786 return; 1787 } 1788 break; 1789 #ifdef ENABLE_BLE 1790 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1791 // skip write le host if not supported (e.g. on LE only EM9301) 1792 if (hci_stack->local_supported_commands[0] & 0x02) break; 1793 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1794 return; 1795 1796 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1797 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1798 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1799 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1800 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1801 return; 1802 } 1803 // explicit fall through to reduce repetitions 1804 1805 #ifdef ENABLE_LE_CENTRAL 1806 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1807 #else 1808 hci_init_done(); 1809 #endif 1810 return; 1811 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1812 1813 #endif /* ENABLE_BLE */ 1814 1815 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1816 // skip write secure connections host support if not supported or disabled 1817 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1] & 0x02) == 0) { 1818 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1819 return; 1820 } 1821 break; 1822 1823 #ifdef ENABLE_SCO_OVER_HCI 1824 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1825 // skip write synchronous flow control if not supported 1826 if (hci_stack->local_supported_commands[0] & 0x04) break; 1827 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1828 1829 /* fall through */ 1830 1831 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1832 // skip write default erroneous data reporting if not supported 1833 if (hci_stack->local_supported_commands[0] & 0x08) break; 1834 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1835 1836 /* fall through */ 1837 1838 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1839 // skip bcm set sco pcm config on non-Broadcom chipsets 1840 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1841 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1842 1843 /* fall through */ 1844 1845 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1846 if (!hci_le_supported()){ 1847 // SKIP LE init for Classic only configuration 1848 hci_init_done(); 1849 return; 1850 } 1851 break; 1852 1853 #else /* !ENABLE_SCO_OVER_HCI */ 1854 1855 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1856 #ifdef ENABLE_BLE 1857 if (hci_le_supported()){ 1858 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1859 return; 1860 } 1861 #endif 1862 // SKIP LE init for Classic only configuration 1863 hci_init_done(); 1864 return; 1865 #endif /* ENABLE_SCO_OVER_HCI */ 1866 1867 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1868 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1869 // Response to command before init done state -> init done 1870 case (HCI_INIT_DONE-1): 1871 hci_init_done(); 1872 return; 1873 #endif 1874 1875 default: 1876 break; 1877 } 1878 hci_initializing_next_state(); 1879 } 1880 1881 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1882 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1883 bd_addr_t bd_address; 1884 (void)memcpy(&bd_address, conn->address, 6); 1885 1886 #ifdef ENABLE_CLASSIC 1887 // cache needed data 1888 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1889 #endif 1890 1891 // connection failed, remove entry 1892 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1893 btstack_memory_hci_connection_free( conn ); 1894 1895 #ifdef ENABLE_CLASSIC 1896 // notify client if dedicated bonding 1897 if (notify_dedicated_bonding_failed){ 1898 log_info("hci notify_dedicated_bonding_failed"); 1899 hci_emit_dedicated_bonding_result(bd_address, status); 1900 } 1901 1902 // if authentication error, also delete link key 1903 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1904 gap_drop_link_key_for_bd_addr(bd_address); 1905 } 1906 #endif 1907 } 1908 1909 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1910 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1911 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1912 if (conn->bonding_flags & BONDING_DEDICATED){ 1913 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1914 } 1915 } 1916 1917 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1918 // handle BT initialization 1919 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1920 hci_initializing_event_handler(packet, size); 1921 } 1922 1923 // help with BT sleep 1924 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1925 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1926 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1927 hci_initializing_next_state(); 1928 } 1929 } 1930 1931 static void event_handler(uint8_t *packet, int size){ 1932 1933 uint16_t event_length = packet[1]; 1934 1935 // assert packet is complete 1936 if (size != (event_length + 2)){ 1937 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1938 return; 1939 } 1940 1941 bd_addr_t addr; 1942 bd_addr_type_t addr_type; 1943 hci_con_handle_t handle; 1944 hci_connection_t * conn; 1945 int i; 1946 int create_connection_cmd; 1947 1948 #ifdef ENABLE_CLASSIC 1949 uint8_t link_type; 1950 #endif 1951 1952 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1953 1954 switch (hci_event_packet_get_type(packet)) { 1955 1956 case HCI_EVENT_COMMAND_COMPLETE: 1957 // get num cmd packets - limit to 1 to reduce complexity 1958 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1959 1960 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1961 if (packet[5]) break; 1962 // terminate, name 248 chars 1963 packet[6+248] = 0; 1964 log_info("local name: %s", &packet[6]); 1965 } 1966 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1967 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1968 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1969 uint16_t acl_len = little_endian_read_16(packet, 6); 1970 uint16_t sco_len = packet[8]; 1971 1972 // determine usable ACL/SCO payload size 1973 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1974 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1975 1976 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1977 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1978 1979 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1980 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1981 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1982 } 1983 } 1984 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 1985 if (packet[5] == 0){ 1986 uint8_t event[5]; 1987 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 1988 event[1] = 3; 1989 (void)memcpy(&event[2], &packet[6], 3); 1990 hci_emit_event(event, sizeof(event), 1); 1991 } 1992 } 1993 #ifdef ENABLE_BLE 1994 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1995 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1996 hci_stack->le_acl_packets_total_num = packet[8]; 1997 // determine usable ACL payload size 1998 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1999 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2000 } 2001 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2002 } 2003 #endif 2004 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2005 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 2006 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2007 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2008 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); 2009 } 2010 #endif 2011 #ifdef ENABLE_LE_CENTRAL 2012 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 2013 hci_stack->le_whitelist_capacity = packet[6]; 2014 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2015 } 2016 #endif 2017 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 2018 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2019 hci_stack->local_bd_addr); 2020 log_info("Local Address, Status: 0x%02x: Addr: %s", 2021 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2022 #ifdef ENABLE_CLASSIC 2023 if (hci_stack->link_key_db){ 2024 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2025 } 2026 #endif 2027 } 2028 #ifdef ENABLE_CLASSIC 2029 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2030 hci_emit_discoverable_enabled(hci_stack->discoverable); 2031 } 2032 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 2033 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2034 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2035 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2036 hci_emit_event(event, sizeof(event), 1); 2037 } 2038 } 2039 #endif 2040 2041 // Note: HCI init checks 2042 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 2043 (void)memcpy(hci_stack->local_supported_features, 2044 &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2045 8); 2046 2047 #ifdef ENABLE_CLASSIC 2048 // determine usable ACL packet types based on host buffer size and supported features 2049 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2050 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2051 #endif 2052 // Classic/LE 2053 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2054 } 2055 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 2056 // hci_stack->hci_version = little_endian_read_16(packet, 4); 2057 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 2058 uint16_t manufacturer = little_endian_read_16(packet, 10); 2059 // map Cypress to Broadcom 2060 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2061 log_info("Treat Cypress as Broadcom"); 2062 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2063 little_endian_store_16(packet, 10, manufacturer); 2064 } 2065 hci_stack->manufacturer = manufacturer; 2066 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 2067 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 2068 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2069 } 2070 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2071 hci_stack->local_supported_commands[0] = 2072 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2073 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2074 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2075 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2076 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2077 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2078 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2079 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+20] & 0x10) << 3); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2080 hci_stack->local_supported_commands[1] = 2081 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+ 2] & 0x40) >> 6) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2082 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+32] & 0x08) >> 2); // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2083 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2084 } 2085 #ifdef ENABLE_CLASSIC 2086 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2087 if (packet[5] == 0){ 2088 hci_stack->synchronous_flow_control_enabled = 1; 2089 } 2090 } 2091 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2092 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2093 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2094 conn = hci_connection_for_handle(handle); 2095 if (!conn) break; 2096 if (status == 0){ 2097 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2098 log_info("Handle %x04x key Size: %u", handle, key_size); 2099 conn->encryption_key_size = key_size; 2100 } else { 2101 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2102 conn->encryption_key_size = 1; 2103 } 2104 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2105 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2106 } 2107 #endif 2108 break; 2109 2110 case HCI_EVENT_COMMAND_STATUS: 2111 // get num cmd packets - limit to 1 to reduce complexity 2112 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2113 2114 // check command status to detected failed outgoing connections 2115 create_connection_cmd = 0; 2116 #ifdef ENABLE_CLASSIC 2117 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2118 create_connection_cmd = 1; 2119 } 2120 #endif 2121 #ifdef ENABLE_LE_CENTRAL 2122 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2123 create_connection_cmd = 1; 2124 } 2125 #endif 2126 if (create_connection_cmd) { 2127 uint8_t status = hci_event_command_status_get_status(packet); 2128 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2129 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); 2130 2131 // reset outgoing address info 2132 memset(hci_stack->outgoing_addr, 0, 6); 2133 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2134 2135 // error => outgoing connection failed 2136 if ((conn != NULL) && (status != 0)){ 2137 hci_handle_connection_failed(conn, status); 2138 } 2139 } 2140 break; 2141 2142 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2143 if (size < 3) return; 2144 uint16_t num_handles = packet[2]; 2145 if (size != (3 + num_handles * 4)) return; 2146 uint16_t offset = 3; 2147 for (i=0; i<num_handles;i++){ 2148 handle = little_endian_read_16(packet, offset) & 0x0fff; 2149 offset += 2; 2150 uint16_t num_packets = little_endian_read_16(packet, offset); 2151 offset += 2; 2152 2153 conn = hci_connection_for_handle(handle); 2154 if (!conn){ 2155 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2156 continue; 2157 } 2158 2159 if (conn->num_packets_sent >= num_packets){ 2160 conn->num_packets_sent -= num_packets; 2161 } else { 2162 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2163 conn->num_packets_sent = 0; 2164 } 2165 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2166 2167 #ifdef ENABLE_CLASSIC 2168 // For SCO, we do the can_send_now_check here 2169 hci_notify_if_sco_can_send_now(); 2170 #endif 2171 } 2172 break; 2173 } 2174 2175 #ifdef ENABLE_CLASSIC 2176 case HCI_EVENT_INQUIRY_COMPLETE: 2177 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2178 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2179 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2180 hci_emit_event(event, sizeof(event), 1); 2181 } 2182 break; 2183 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2184 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2185 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2186 } 2187 break; 2188 case HCI_EVENT_CONNECTION_REQUEST: 2189 reverse_bd_addr(&packet[2], addr); 2190 if (hci_stack->gap_classic_accept_callback != NULL){ 2191 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2192 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2193 bd_addr_copy(hci_stack->decline_addr, addr); 2194 break; 2195 } 2196 } 2197 2198 // TODO: eval COD 8-10 2199 link_type = packet[11]; 2200 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2201 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2202 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2203 if (!conn) { 2204 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2205 } 2206 if (!conn) { 2207 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2208 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2209 bd_addr_copy(hci_stack->decline_addr, addr); 2210 break; 2211 } 2212 conn->role = HCI_ROLE_SLAVE; 2213 conn->state = RECEIVED_CONNECTION_REQUEST; 2214 // store info about eSCO 2215 if (link_type == 0x02){ 2216 conn->remote_supported_features[0] |= 1; 2217 } 2218 hci_run(); 2219 break; 2220 2221 case HCI_EVENT_CONNECTION_COMPLETE: 2222 // Connection management 2223 reverse_bd_addr(&packet[5], addr); 2224 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2225 addr_type = BD_ADDR_TYPE_ACL; 2226 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2227 if (conn) { 2228 if (!packet[2]){ 2229 conn->state = OPEN; 2230 conn->con_handle = little_endian_read_16(packet, 3); 2231 2232 // queue get remote feature 2233 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2234 2235 // queue set supervision timeout if we're master 2236 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2237 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2238 } 2239 2240 // restart timer 2241 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2242 btstack_run_loop_add_timer(&conn->timeout); 2243 2244 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2245 2246 hci_emit_nr_connections_changed(); 2247 } else { 2248 // connection failed 2249 hci_handle_connection_failed(conn, packet[2]); 2250 } 2251 } 2252 break; 2253 2254 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2255 reverse_bd_addr(&packet[5], addr); 2256 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2257 if (packet[2]){ 2258 // connection failed 2259 break; 2260 } 2261 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2262 if (!conn) { 2263 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2264 } 2265 if (!conn) { 2266 break; 2267 } 2268 conn->state = OPEN; 2269 conn->con_handle = little_endian_read_16(packet, 3); 2270 2271 #ifdef ENABLE_SCO_OVER_HCI 2272 // update SCO 2273 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2274 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2275 } 2276 // trigger can send now 2277 if (hci_have_usb_transport()){ 2278 hci_stack->sco_can_send_now = 1; 2279 } 2280 #endif 2281 break; 2282 2283 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2284 handle = little_endian_read_16(packet, 3); 2285 conn = hci_connection_for_handle(handle); 2286 if (!conn) break; 2287 if (!packet[2]){ 2288 uint8_t * features = &packet[5]; 2289 // SSP Controller 2290 if (features[6] & (1 << 3)){ 2291 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2292 } 2293 // eSCO 2294 if (features[3] & (1<<7)){ 2295 conn->remote_supported_features[0] |= 1; 2296 } 2297 // Extended features 2298 if (features[7] & (1<<7)){ 2299 conn->remote_supported_features[0] |= 2; 2300 } 2301 // read extended features if possible 2302 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2303 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2304 break; 2305 } 2306 } 2307 hci_handle_remote_features_received(conn); 2308 break; 2309 2310 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2311 handle = little_endian_read_16(packet, 3); 2312 conn = hci_connection_for_handle(handle); 2313 if (!conn) break; 2314 // status = ok, page = 1 2315 if (!packet[2] && packet[5] == 1){ 2316 const uint8_t * features = &packet[7]; 2317 // SSP Host 2318 if (features[0] & (1 << 0)){ 2319 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2320 } 2321 } 2322 hci_handle_remote_features_received(conn); 2323 break; 2324 2325 case HCI_EVENT_LINK_KEY_REQUEST: 2326 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2327 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2328 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2329 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2330 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2331 hci_run(); 2332 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2333 return; 2334 2335 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2336 reverse_bd_addr(&packet[2], addr); 2337 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2338 if (!conn) break; 2339 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2340 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2341 // Change Connection Encryption keeps link key type 2342 if (link_key_type != CHANGED_COMBINATION_KEY){ 2343 conn->link_key_type = link_key_type; 2344 } 2345 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2346 // still forward event to allow dismiss of pairing dialog 2347 break; 2348 } 2349 2350 case HCI_EVENT_PIN_CODE_REQUEST: 2351 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2352 // non-bondable mode: pin code negative reply will be sent 2353 if (!hci_stack->bondable){ 2354 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2355 hci_run(); 2356 return; 2357 } 2358 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2359 if (!hci_stack->link_key_db) break; 2360 hci_event_pin_code_request_get_bd_addr(packet, addr); 2361 hci_stack->link_key_db->delete_link_key(addr); 2362 break; 2363 2364 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2365 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2366 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2367 break; 2368 2369 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2370 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2371 if (!hci_stack->ssp_auto_accept) break; 2372 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2373 break; 2374 2375 case HCI_EVENT_USER_PASSKEY_REQUEST: 2376 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2377 if (!hci_stack->ssp_auto_accept) break; 2378 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2379 break; 2380 case HCI_EVENT_MODE_CHANGE: 2381 handle = hci_event_mode_change_get_handle(packet); 2382 conn = hci_connection_for_handle(handle); 2383 if (!conn) break; 2384 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2385 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2386 break; 2387 #endif 2388 2389 case HCI_EVENT_ENCRYPTION_CHANGE: 2390 handle = hci_event_encryption_change_get_connection_handle(packet); 2391 conn = hci_connection_for_handle(handle); 2392 if (!conn) break; 2393 if (hci_event_encryption_change_get_status(packet) == 0) { 2394 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2395 if (encryption_enabled){ 2396 if (hci_is_le_connection(conn)){ 2397 // For LE, we accept connection as encrypted 2398 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2399 } 2400 #ifdef ENABLE_CLASSIC 2401 else { 2402 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2403 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2404 bool connected_uses_aes_ccm = encryption_enabled == 2; 2405 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2406 log_info("SC during pairing, but only E0 now -> abort"); 2407 conn->state = conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2408 break; 2409 } 2410 2411 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2412 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2413 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2414 } else { 2415 // if not, pretend everything is perfect 2416 conn->encryption_key_size = 16; 2417 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2418 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2419 } 2420 } 2421 #endif 2422 } else { 2423 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2424 } 2425 } 2426 2427 break; 2428 2429 #ifdef ENABLE_CLASSIC 2430 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2431 handle = little_endian_read_16(packet, 3); 2432 conn = hci_connection_for_handle(handle); 2433 if (!conn) break; 2434 2435 // dedicated bonding: send result and disconnect 2436 if (conn->bonding_flags & BONDING_DEDICATED){ 2437 conn->bonding_flags &= ~BONDING_DEDICATED; 2438 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2439 conn->bonding_status = packet[2]; 2440 break; 2441 } 2442 2443 if ((packet[2] == 0) && (gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)){ 2444 // link key sufficient for requested security 2445 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2446 break; 2447 } 2448 // not enough 2449 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2450 break; 2451 #endif 2452 2453 // HCI_EVENT_DISCONNECTION_COMPLETE 2454 // has been split, to first notify stack before shutting connection down 2455 // see end of function, too. 2456 case HCI_EVENT_DISCONNECTION_COMPLETE: 2457 if (packet[2]) break; // status != 0 2458 handle = little_endian_read_16(packet, 3); 2459 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2460 if (hci_stack->acl_fragmentation_total_size > 0) { 2461 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2462 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2463 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2464 hci_stack->acl_fragmentation_total_size = 0; 2465 hci_stack->acl_fragmentation_pos = 0; 2466 if (release_buffer){ 2467 hci_release_packet_buffer(); 2468 } 2469 } 2470 } 2471 2472 conn = hci_connection_for_handle(handle); 2473 if (!conn) break; 2474 // mark connection for shutdown 2475 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2476 2477 // emit dedicatd bonding event 2478 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2479 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2480 } 2481 2482 #ifdef ENABLE_BLE 2483 #ifdef ENABLE_LE_PERIPHERAL 2484 // re-enable advertisements for le connections if active 2485 if (hci_is_le_connection(conn)){ 2486 hci_reenable_advertisements_if_needed(); 2487 } 2488 #endif 2489 #endif 2490 break; 2491 2492 case HCI_EVENT_HARDWARE_ERROR: 2493 log_error("Hardware Error: 0x%02x", packet[2]); 2494 if (hci_stack->hardware_error_callback){ 2495 (*hci_stack->hardware_error_callback)(packet[2]); 2496 } else { 2497 // if no special requests, just reboot stack 2498 hci_power_control_off(); 2499 hci_power_control_on(); 2500 } 2501 break; 2502 2503 #ifdef ENABLE_CLASSIC 2504 case HCI_EVENT_ROLE_CHANGE: 2505 if (packet[2]) break; // status != 0 2506 reverse_bd_addr(&packet[3], addr); 2507 addr_type = BD_ADDR_TYPE_ACL; 2508 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2509 if (!conn) break; 2510 conn->role = packet[9]; 2511 break; 2512 #endif 2513 2514 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2515 // release packet buffer only for asynchronous transport and if there are not further fragements 2516 if (hci_transport_synchronous()) { 2517 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2518 return; // instead of break: to avoid re-entering hci_run() 2519 } 2520 hci_stack->acl_fragmentation_tx_active = 0; 2521 if (hci_stack->acl_fragmentation_total_size) break; 2522 hci_release_packet_buffer(); 2523 2524 // L2CAP receives this event via the hci_emit_event below 2525 2526 #ifdef ENABLE_CLASSIC 2527 // For SCO, we do the can_send_now_check here 2528 hci_notify_if_sco_can_send_now(); 2529 #endif 2530 break; 2531 2532 #ifdef ENABLE_CLASSIC 2533 case HCI_EVENT_SCO_CAN_SEND_NOW: 2534 // For SCO, we do the can_send_now_check here 2535 hci_stack->sco_can_send_now = 1; 2536 hci_notify_if_sco_can_send_now(); 2537 return; 2538 2539 // explode inquriy results for easier consumption 2540 case HCI_EVENT_INQUIRY_RESULT: 2541 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2542 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2543 gap_inquiry_explode(packet, size); 2544 break; 2545 #endif 2546 2547 #ifdef ENABLE_BLE 2548 case HCI_EVENT_LE_META: 2549 switch (packet[2]){ 2550 #ifdef ENABLE_LE_CENTRAL 2551 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2552 // log_info("advertising report received"); 2553 if (!hci_stack->le_scanning_enabled) break; 2554 le_handle_advertisement_report(packet, size); 2555 break; 2556 #endif 2557 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2558 // Connection management 2559 reverse_bd_addr(&packet[8], addr); 2560 addr_type = (bd_addr_type_t)packet[7]; 2561 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2562 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2563 2564 #ifdef ENABLE_LE_CENTRAL 2565 // if auto-connect, remove from whitelist in both roles 2566 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2567 hci_remove_from_whitelist(addr_type, addr); 2568 } 2569 // handle error: error is reported only to the initiator -> outgoing connection 2570 if (packet[3]){ 2571 2572 // handle cancelled outgoing connection 2573 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2574 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2575 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2576 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2577 conn = gap_get_outgoing_connection(); 2578 } 2579 2580 // outgoing connection establishment is done 2581 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2582 // remove entry 2583 if (conn){ 2584 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2585 btstack_memory_hci_connection_free( conn ); 2586 } 2587 break; 2588 } 2589 #endif 2590 // on success, both hosts receive connection complete event 2591 if (packet[6] == HCI_ROLE_MASTER){ 2592 #ifdef ENABLE_LE_CENTRAL 2593 // if we're master, it was an outgoing connection and we're done with it 2594 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2595 #endif 2596 } else { 2597 #ifdef ENABLE_LE_PERIPHERAL 2598 // if we're slave, it was an incoming connection, advertisements have stopped 2599 hci_stack->le_advertisements_active = 0; 2600 #endif 2601 } 2602 // LE connections are auto-accepted, so just create a connection if there isn't one already 2603 if (!conn){ 2604 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2605 } 2606 // no memory, sorry. 2607 if (!conn){ 2608 break; 2609 } 2610 2611 conn->state = OPEN; 2612 conn->role = packet[6]; 2613 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2614 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2615 2616 #ifdef ENABLE_LE_PERIPHERAL 2617 if (packet[6] == HCI_ROLE_SLAVE){ 2618 hci_reenable_advertisements_if_needed(); 2619 } 2620 #endif 2621 2622 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2623 2624 // restart timer 2625 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2626 // btstack_run_loop_add_timer(&conn->timeout); 2627 2628 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2629 2630 hci_emit_nr_connections_changed(); 2631 break; 2632 2633 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2634 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2635 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2636 conn = hci_connection_for_handle(handle); 2637 if (!conn) break; 2638 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2639 break; 2640 2641 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2642 // connection 2643 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2644 conn = hci_connection_for_handle(handle); 2645 if (conn) { 2646 // read arguments 2647 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2648 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2649 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2650 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2651 2652 // validate against current connection parameter range 2653 le_connection_parameter_range_t existing_range; 2654 gap_get_connection_parameter_range(&existing_range); 2655 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2656 if (update_parameter){ 2657 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2658 conn->le_conn_interval_min = le_conn_interval_min; 2659 conn->le_conn_interval_max = le_conn_interval_max; 2660 conn->le_conn_latency = le_conn_latency; 2661 conn->le_supervision_timeout = le_supervision_timeout; 2662 } else { 2663 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2664 } 2665 } 2666 break; 2667 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2668 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2669 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2670 conn = hci_connection_for_handle(handle); 2671 if (conn) { 2672 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2673 } 2674 break; 2675 #endif 2676 default: 2677 break; 2678 } 2679 break; 2680 #endif 2681 case HCI_EVENT_VENDOR_SPECIFIC: 2682 // Vendor specific commands often create vendor specific event instead of num completed packets 2683 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2684 switch (hci_stack->manufacturer){ 2685 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2686 hci_stack->num_cmd_packets = 1; 2687 break; 2688 default: 2689 break; 2690 } 2691 break; 2692 default: 2693 break; 2694 } 2695 2696 handle_event_for_current_stack_state(packet, size); 2697 2698 // notify upper stack 2699 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2700 2701 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2702 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2703 if (!packet[2]){ 2704 handle = little_endian_read_16(packet, 3); 2705 hci_connection_t * aConn = hci_connection_for_handle(handle); 2706 if (aConn) { 2707 // discard connection if app did not trigger a reconnect in the event handler 2708 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2709 hci_shutdown_connection(aConn); 2710 } 2711 } 2712 } 2713 } 2714 2715 // execute main loop 2716 hci_run(); 2717 } 2718 2719 #ifdef ENABLE_CLASSIC 2720 2721 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2722 static void sco_schedule_tx(hci_connection_t * conn); 2723 2724 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2725 log_debug("SCO TX Timeout"); 2726 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2727 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2728 if (!conn) return; 2729 2730 // trigger send 2731 conn->sco_tx_ready = 1; 2732 // extra packet if CVSD but SCO buffer is too short 2733 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2734 conn->sco_tx_ready++; 2735 } 2736 hci_notify_if_sco_can_send_now(); 2737 } 2738 2739 2740 #define SCO_TX_AFTER_RX_MS (6) 2741 2742 static void sco_schedule_tx(hci_connection_t * conn){ 2743 2744 uint32_t now = btstack_run_loop_get_time_ms(); 2745 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2746 int time_delta_ms = sco_tx_ms - now; 2747 2748 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2749 2750 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2751 btstack_run_loop_set_timer(timer, time_delta_ms); 2752 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2753 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2754 btstack_run_loop_add_timer(timer); 2755 } 2756 2757 static void sco_handler(uint8_t * packet, uint16_t size){ 2758 // lookup connection struct 2759 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2760 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2761 if (!conn) return; 2762 2763 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2764 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2765 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2766 packet[2] = 0x3c; 2767 memmove(&packet[3], &packet[23], 63); 2768 size = 63; 2769 } 2770 } 2771 2772 if (hci_have_usb_transport()){ 2773 // Nothing to do 2774 } else { 2775 // 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); 2776 if (hci_stack->synchronous_flow_control_enabled == 0){ 2777 uint32_t now = btstack_run_loop_get_time_ms(); 2778 2779 if (!conn->sco_rx_valid){ 2780 // ignore first 10 packets 2781 conn->sco_rx_count++; 2782 // log_debug("sco rx count %u", conn->sco_rx_count); 2783 if (conn->sco_rx_count == 10) { 2784 // use first timestamp as is and pretent it just started 2785 conn->sco_rx_ms = now; 2786 conn->sco_rx_valid = 1; 2787 conn->sco_rx_count = 0; 2788 sco_schedule_tx(conn); 2789 } 2790 } else { 2791 // track expected arrival timme 2792 conn->sco_rx_count++; 2793 conn->sco_rx_ms += 7; 2794 int delta = (int32_t) (now - conn->sco_rx_ms); 2795 if (delta > 0){ 2796 conn->sco_rx_ms++; 2797 } 2798 // log_debug("sco rx %u", conn->sco_rx_ms); 2799 sco_schedule_tx(conn); 2800 } 2801 } 2802 } 2803 // deliver to app 2804 if (hci_stack->sco_packet_handler) { 2805 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2806 } 2807 2808 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2809 conn->num_packets_completed++; 2810 hci_stack->host_completed_packets = 1; 2811 hci_run(); 2812 #endif 2813 } 2814 #endif 2815 2816 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2817 hci_dump_packet(packet_type, 1, packet, size); 2818 switch (packet_type) { 2819 case HCI_EVENT_PACKET: 2820 event_handler(packet, size); 2821 break; 2822 case HCI_ACL_DATA_PACKET: 2823 acl_handler(packet, size); 2824 break; 2825 #ifdef ENABLE_CLASSIC 2826 case HCI_SCO_DATA_PACKET: 2827 sco_handler(packet, size); 2828 break; 2829 #endif 2830 default: 2831 break; 2832 } 2833 } 2834 2835 /** 2836 * @brief Add event packet handler. 2837 */ 2838 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2839 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2840 } 2841 2842 2843 /** Register HCI packet handlers */ 2844 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2845 hci_stack->acl_packet_handler = handler; 2846 } 2847 2848 #ifdef ENABLE_CLASSIC 2849 /** 2850 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2851 */ 2852 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2853 hci_stack->sco_packet_handler = handler; 2854 } 2855 #endif 2856 2857 static void hci_state_reset(void){ 2858 // no connections yet 2859 hci_stack->connections = NULL; 2860 2861 // keep discoverable/connectable as this has been requested by the client(s) 2862 // hci_stack->discoverable = 0; 2863 // hci_stack->connectable = 0; 2864 // hci_stack->bondable = 1; 2865 // hci_stack->own_addr_type = 0; 2866 2867 // buffer is free 2868 hci_stack->hci_packet_buffer_reserved = 0; 2869 2870 // no pending cmds 2871 hci_stack->decline_reason = 0; 2872 hci_stack->new_scan_enable_value = 0xff; 2873 2874 // LE 2875 #ifdef ENABLE_BLE 2876 memset(hci_stack->le_random_address, 0, 6); 2877 hci_stack->le_random_address_set = 0; 2878 #endif 2879 #ifdef ENABLE_LE_CENTRAL 2880 hci_stack->le_scanning_active = 0; 2881 hci_stack->le_scan_type = 0xff; 2882 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2883 hci_stack->le_whitelist = 0; 2884 hci_stack->le_whitelist_capacity = 0; 2885 #endif 2886 } 2887 2888 #ifdef ENABLE_CLASSIC 2889 /** 2890 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2891 */ 2892 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2893 // store and open remote device db 2894 hci_stack->link_key_db = link_key_db; 2895 if (hci_stack->link_key_db) { 2896 hci_stack->link_key_db->open(); 2897 } 2898 } 2899 #endif 2900 2901 void hci_init(const hci_transport_t *transport, const void *config){ 2902 2903 #ifdef HAVE_MALLOC 2904 if (!hci_stack) { 2905 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2906 } 2907 #else 2908 hci_stack = &hci_stack_static; 2909 #endif 2910 memset(hci_stack, 0, sizeof(hci_stack_t)); 2911 2912 // reference to use transport layer implementation 2913 hci_stack->hci_transport = transport; 2914 2915 // reference to used config 2916 hci_stack->config = config; 2917 2918 // setup pointer for outgoing packet buffer 2919 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2920 2921 // max acl payload size defined in config.h 2922 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2923 2924 // register packet handlers with transport 2925 transport->register_packet_handler(&packet_handler); 2926 2927 hci_stack->state = HCI_STATE_OFF; 2928 2929 // class of device 2930 hci_stack->class_of_device = 0x007a020c; // Smartphone 2931 2932 // bondable by default 2933 hci_stack->bondable = 1; 2934 2935 #ifdef ENABLE_CLASSIC 2936 // classic name 2937 hci_stack->local_name = default_classic_name; 2938 2939 // Master slave policy 2940 hci_stack->master_slave_policy = 1; 2941 2942 // Allow Role Switch 2943 hci_stack->allow_role_switch = 1; 2944 2945 // Default / minimum security level = 2 2946 hci_stack->gap_security_level = LEVEL_2; 2947 2948 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2949 hci_stack->gap_required_encyrption_key_size = 16; 2950 #endif 2951 2952 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2953 hci_stack->ssp_enable = 1; 2954 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2955 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2956 hci_stack->ssp_auto_accept = 1; 2957 2958 // Secure Connections: enable (requires support from Controller) 2959 hci_stack->secure_connections_enable = true; 2960 2961 // voice setting - signed 16 bit pcm data with CVSD over the air 2962 hci_stack->sco_voice_setting = 0x60; 2963 2964 #ifdef ENABLE_LE_CENTRAL 2965 // connection parameter to use for outgoing connections 2966 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2967 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2968 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2969 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2970 hci_stack->le_connection_latency = 4; // 4 2971 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2972 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2973 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2974 2975 // default LE Scanning 2976 hci_stack->le_scan_interval = 0x1e0; 2977 hci_stack->le_scan_window = 0x30; 2978 #endif 2979 2980 #ifdef ENABLE_LE_PERIPHERAL 2981 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2982 #endif 2983 2984 // connection parameter range used to answer connection parameter update requests in l2cap 2985 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2986 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2987 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2988 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2989 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2990 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2991 2992 hci_state_reset(); 2993 } 2994 2995 /** 2996 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2997 */ 2998 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2999 hci_stack->chipset = chipset_driver; 3000 3001 // reset chipset driver - init is also called on power_up 3002 if (hci_stack->chipset && hci_stack->chipset->init){ 3003 hci_stack->chipset->init(hci_stack->config); 3004 } 3005 } 3006 3007 /** 3008 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3009 */ 3010 void hci_set_control(const btstack_control_t *hardware_control){ 3011 // references to used control implementation 3012 hci_stack->control = hardware_control; 3013 // init with transport config 3014 hardware_control->init(hci_stack->config); 3015 } 3016 3017 void hci_close(void){ 3018 // close remote device db 3019 if (hci_stack->link_key_db) { 3020 hci_stack->link_key_db->close(); 3021 } 3022 3023 btstack_linked_list_iterator_t lit; 3024 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3025 while (btstack_linked_list_iterator_has_next(&lit)){ 3026 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3027 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3028 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3029 hci_shutdown_connection(connection); 3030 } 3031 3032 hci_power_control(HCI_POWER_OFF); 3033 3034 #ifdef HAVE_MALLOC 3035 free(hci_stack); 3036 #endif 3037 hci_stack = NULL; 3038 } 3039 3040 #ifdef ENABLE_CLASSIC 3041 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3042 // validate ranage and set 3043 if (encryption_key_size < 7) return; 3044 if (encryption_key_size > 16) return; 3045 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3046 } 3047 3048 void gap_set_security_level(gap_security_level_t security_level){ 3049 hci_stack->gap_security_level = security_level; 3050 } 3051 3052 gap_security_level_t gap_get_security_level(void){ 3053 return hci_stack->gap_security_level; 3054 } 3055 #endif 3056 3057 #ifdef ENABLE_CLASSIC 3058 void gap_set_class_of_device(uint32_t class_of_device){ 3059 hci_stack->class_of_device = class_of_device; 3060 } 3061 3062 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3063 hci_stack->default_link_policy_settings = default_link_policy_settings; 3064 } 3065 3066 void gap_set_allow_role_switch(bool allow_role_switch){ 3067 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3068 } 3069 3070 uint8_t hci_get_allow_role_switch(void){ 3071 return hci_stack->allow_role_switch; 3072 } 3073 3074 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3075 hci_stack->link_supervision_timeout = link_supervision_timeout; 3076 } 3077 3078 void hci_disable_l2cap_timeout_check(void){ 3079 disable_l2cap_timeouts = 1; 3080 } 3081 #endif 3082 3083 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3084 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3085 void hci_set_bd_addr(bd_addr_t addr){ 3086 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3087 hci_stack->custom_bd_addr_set = 1; 3088 } 3089 #endif 3090 3091 // State-Module-Driver overview 3092 // state module low-level 3093 // HCI_STATE_OFF off close 3094 // HCI_STATE_INITIALIZING, on open 3095 // HCI_STATE_WORKING, on open 3096 // HCI_STATE_HALTING, on open 3097 // HCI_STATE_SLEEPING, off/sleep close 3098 // HCI_STATE_FALLING_ASLEEP on open 3099 3100 static int hci_power_control_on(void){ 3101 3102 // power on 3103 int err = 0; 3104 if (hci_stack->control && hci_stack->control->on){ 3105 err = (*hci_stack->control->on)(); 3106 } 3107 if (err){ 3108 log_error( "POWER_ON failed"); 3109 hci_emit_hci_open_failed(); 3110 return err; 3111 } 3112 3113 // int chipset driver 3114 if (hci_stack->chipset && hci_stack->chipset->init){ 3115 hci_stack->chipset->init(hci_stack->config); 3116 } 3117 3118 // init transport 3119 if (hci_stack->hci_transport->init){ 3120 hci_stack->hci_transport->init(hci_stack->config); 3121 } 3122 3123 // open transport 3124 err = hci_stack->hci_transport->open(); 3125 if (err){ 3126 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3127 if (hci_stack->control && hci_stack->control->off){ 3128 (*hci_stack->control->off)(); 3129 } 3130 hci_emit_hci_open_failed(); 3131 return err; 3132 } 3133 return 0; 3134 } 3135 3136 static void hci_power_control_off(void){ 3137 3138 log_info("hci_power_control_off"); 3139 3140 // close low-level device 3141 hci_stack->hci_transport->close(); 3142 3143 log_info("hci_power_control_off - hci_transport closed"); 3144 3145 // power off 3146 if (hci_stack->control && hci_stack->control->off){ 3147 (*hci_stack->control->off)(); 3148 } 3149 3150 log_info("hci_power_control_off - control closed"); 3151 3152 hci_stack->state = HCI_STATE_OFF; 3153 } 3154 3155 static void hci_power_control_sleep(void){ 3156 3157 log_info("hci_power_control_sleep"); 3158 3159 #if 0 3160 // don't close serial port during sleep 3161 3162 // close low-level device 3163 hci_stack->hci_transport->close(hci_stack->config); 3164 #endif 3165 3166 // sleep mode 3167 if (hci_stack->control && hci_stack->control->sleep){ 3168 (*hci_stack->control->sleep)(); 3169 } 3170 3171 hci_stack->state = HCI_STATE_SLEEPING; 3172 } 3173 3174 static int hci_power_control_wake(void){ 3175 3176 log_info("hci_power_control_wake"); 3177 3178 // wake on 3179 if (hci_stack->control && hci_stack->control->wake){ 3180 (*hci_stack->control->wake)(); 3181 } 3182 3183 #if 0 3184 // open low-level device 3185 int err = hci_stack->hci_transport->open(hci_stack->config); 3186 if (err){ 3187 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3188 if (hci_stack->control && hci_stack->control->off){ 3189 (*hci_stack->control->off)(); 3190 } 3191 hci_emit_hci_open_failed(); 3192 return err; 3193 } 3194 #endif 3195 3196 return 0; 3197 } 3198 3199 static void hci_power_transition_to_initializing(void){ 3200 // set up state machine 3201 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3202 hci_stack->hci_packet_buffer_reserved = 0; 3203 hci_stack->state = HCI_STATE_INITIALIZING; 3204 hci_stack->substate = HCI_INIT_SEND_RESET; 3205 } 3206 3207 int hci_power_control(HCI_POWER_MODE power_mode){ 3208 3209 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3210 3211 int err = 0; 3212 switch (hci_stack->state){ 3213 3214 case HCI_STATE_OFF: 3215 switch (power_mode){ 3216 case HCI_POWER_ON: 3217 err = hci_power_control_on(); 3218 if (err) { 3219 log_error("hci_power_control_on() error %d", err); 3220 return err; 3221 } 3222 hci_power_transition_to_initializing(); 3223 break; 3224 case HCI_POWER_OFF: 3225 // do nothing 3226 break; 3227 case HCI_POWER_SLEEP: 3228 // do nothing (with SLEEP == OFF) 3229 break; 3230 } 3231 break; 3232 3233 case HCI_STATE_INITIALIZING: 3234 switch (power_mode){ 3235 case HCI_POWER_ON: 3236 // do nothing 3237 break; 3238 case HCI_POWER_OFF: 3239 // no connections yet, just turn it off 3240 hci_power_control_off(); 3241 break; 3242 case HCI_POWER_SLEEP: 3243 // no connections yet, just turn it off 3244 hci_power_control_sleep(); 3245 break; 3246 } 3247 break; 3248 3249 case HCI_STATE_WORKING: 3250 switch (power_mode){ 3251 case HCI_POWER_ON: 3252 // do nothing 3253 break; 3254 case HCI_POWER_OFF: 3255 // see hci_run 3256 hci_stack->state = HCI_STATE_HALTING; 3257 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3258 break; 3259 case HCI_POWER_SLEEP: 3260 // see hci_run 3261 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3262 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3263 break; 3264 } 3265 break; 3266 3267 case HCI_STATE_HALTING: 3268 switch (power_mode){ 3269 case HCI_POWER_ON: 3270 hci_power_transition_to_initializing(); 3271 break; 3272 case HCI_POWER_OFF: 3273 // do nothing 3274 break; 3275 case HCI_POWER_SLEEP: 3276 // see hci_run 3277 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3278 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3279 break; 3280 } 3281 break; 3282 3283 case HCI_STATE_FALLING_ASLEEP: 3284 switch (power_mode){ 3285 case HCI_POWER_ON: 3286 3287 #ifdef HAVE_PLATFORM_IPHONE_OS 3288 // nothing to do, if H4 supports power management 3289 if (btstack_control_iphone_power_management_enabled()){ 3290 hci_stack->state = HCI_STATE_INITIALIZING; 3291 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3292 break; 3293 } 3294 #endif 3295 hci_power_transition_to_initializing(); 3296 break; 3297 case HCI_POWER_OFF: 3298 // see hci_run 3299 hci_stack->state = HCI_STATE_HALTING; 3300 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3301 break; 3302 case HCI_POWER_SLEEP: 3303 // do nothing 3304 break; 3305 } 3306 break; 3307 3308 case HCI_STATE_SLEEPING: 3309 switch (power_mode){ 3310 case HCI_POWER_ON: 3311 3312 #ifdef HAVE_PLATFORM_IPHONE_OS 3313 // nothing to do, if H4 supports power management 3314 if (btstack_control_iphone_power_management_enabled()){ 3315 hci_stack->state = HCI_STATE_INITIALIZING; 3316 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3317 hci_update_scan_enable(); 3318 break; 3319 } 3320 #endif 3321 err = hci_power_control_wake(); 3322 if (err) return err; 3323 hci_power_transition_to_initializing(); 3324 break; 3325 case HCI_POWER_OFF: 3326 hci_stack->state = HCI_STATE_HALTING; 3327 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3328 break; 3329 case HCI_POWER_SLEEP: 3330 // do nothing 3331 break; 3332 } 3333 break; 3334 } 3335 3336 // create internal event 3337 hci_emit_state(); 3338 3339 // trigger next/first action 3340 hci_run(); 3341 3342 return 0; 3343 } 3344 3345 3346 #ifdef ENABLE_CLASSIC 3347 3348 static void hci_update_scan_enable(void){ 3349 // 2 = page scan, 1 = inq scan 3350 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3351 hci_run(); 3352 } 3353 3354 void gap_discoverable_control(uint8_t enable){ 3355 if (enable) enable = 1; // normalize argument 3356 3357 if (hci_stack->discoverable == enable){ 3358 hci_emit_discoverable_enabled(hci_stack->discoverable); 3359 return; 3360 } 3361 3362 hci_stack->discoverable = enable; 3363 hci_update_scan_enable(); 3364 } 3365 3366 void gap_connectable_control(uint8_t enable){ 3367 if (enable) enable = 1; // normalize argument 3368 3369 // don't emit event 3370 if (hci_stack->connectable == enable) return; 3371 3372 hci_stack->connectable = enable; 3373 hci_update_scan_enable(); 3374 } 3375 #endif 3376 3377 void gap_local_bd_addr(bd_addr_t address_buffer){ 3378 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3379 } 3380 3381 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3382 static void hci_host_num_completed_packets(void){ 3383 3384 // create packet manually as arrays are not supported and num_commands should not get reduced 3385 hci_reserve_packet_buffer(); 3386 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3387 3388 uint16_t size = 0; 3389 uint16_t num_handles = 0; 3390 packet[size++] = 0x35; 3391 packet[size++] = 0x0c; 3392 size++; // skip param len 3393 size++; // skip num handles 3394 3395 // add { handle, packets } entries 3396 btstack_linked_item_t * it; 3397 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3398 hci_connection_t * connection = (hci_connection_t *) it; 3399 if (connection->num_packets_completed){ 3400 little_endian_store_16(packet, size, connection->con_handle); 3401 size += 2; 3402 little_endian_store_16(packet, size, connection->num_packets_completed); 3403 size += 2; 3404 // 3405 num_handles++; 3406 connection->num_packets_completed = 0; 3407 } 3408 } 3409 3410 packet[2] = size - 3; 3411 packet[3] = num_handles; 3412 3413 hci_stack->host_completed_packets = 0; 3414 3415 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3416 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3417 3418 // release packet buffer for synchronous transport implementations 3419 if (hci_transport_synchronous()){ 3420 hci_release_packet_buffer(); 3421 hci_emit_transport_packet_sent(); 3422 } 3423 } 3424 #endif 3425 3426 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3427 UNUSED(ds); 3428 hci_stack->substate = HCI_HALTING_CLOSE; 3429 // allow packet handlers to defer final shutdown 3430 hci_emit_state(); 3431 hci_run(); 3432 } 3433 3434 static bool hci_run_acl_fragments(void){ 3435 if (hci_stack->acl_fragmentation_total_size > 0) { 3436 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3437 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3438 if (connection) { 3439 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3440 hci_send_acl_packet_fragments(connection); 3441 return true; 3442 } 3443 } else { 3444 // connection gone -> discard further fragments 3445 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3446 hci_stack->acl_fragmentation_total_size = 0; 3447 hci_stack->acl_fragmentation_pos = 0; 3448 } 3449 } 3450 return false; 3451 } 3452 3453 #ifdef ENABLE_CLASSIC 3454 static bool hci_run_general_gap_classic(void){ 3455 3456 // decline incoming connections 3457 if (hci_stack->decline_reason){ 3458 uint8_t reason = hci_stack->decline_reason; 3459 hci_stack->decline_reason = 0; 3460 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3461 return true; 3462 } 3463 // send scan enable 3464 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3465 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3466 hci_stack->new_scan_enable_value = 0xff; 3467 return true; 3468 } 3469 // start/stop inquiry 3470 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3471 uint8_t duration = hci_stack->inquiry_state; 3472 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3473 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3474 return true; 3475 } 3476 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3477 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3478 hci_send_cmd(&hci_inquiry_cancel); 3479 return true; 3480 } 3481 // remote name request 3482 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3483 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3484 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3485 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3486 return true; 3487 } 3488 // pairing 3489 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3490 uint8_t state = hci_stack->gap_pairing_state; 3491 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3492 switch (state){ 3493 case GAP_PAIRING_STATE_SEND_PIN: 3494 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, strlen(hci_stack->gap_pairing_input.gap_pairing_pin), hci_stack->gap_pairing_input.gap_pairing_pin); 3495 break; 3496 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3497 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3498 break; 3499 case GAP_PAIRING_STATE_SEND_PASSKEY: 3500 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3501 break; 3502 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3503 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3504 break; 3505 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3506 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3507 break; 3508 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3509 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3510 break; 3511 default: 3512 break; 3513 } 3514 return true; 3515 } 3516 return false; 3517 } 3518 #endif 3519 3520 #ifdef ENABLE_BLE 3521 static bool hci_run_general_gap_le(void){ 3522 3523 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3524 3525 if (hci_stack->state != HCI_STATE_WORKING) return false; 3526 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0) ) return false; 3527 3528 #ifdef ENABLE_LE_CENTRAL 3529 // parameter change requires scanning to be stopped first 3530 if (hci_stack->le_scan_type != 0xff) { 3531 if (hci_stack->le_scanning_active){ 3532 hci_stack->le_scanning_active = 0; 3533 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3534 } else { 3535 int scan_type = (int) hci_stack->le_scan_type; 3536 hci_stack->le_scan_type = 0xff; 3537 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); 3538 } 3539 return true; 3540 } 3541 // finally, we can enable/disable le scan 3542 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3543 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3544 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3545 return true; 3546 } 3547 #endif 3548 #ifdef ENABLE_LE_PERIPHERAL 3549 // le advertisement control 3550 if (hci_stack->le_advertisements_todo){ 3551 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3552 } 3553 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3554 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3555 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3556 return true; 3557 } 3558 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3559 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3560 hci_send_cmd(&hci_le_set_advertising_parameters, 3561 hci_stack->le_advertisements_interval_min, 3562 hci_stack->le_advertisements_interval_max, 3563 hci_stack->le_advertisements_type, 3564 hci_stack->le_own_addr_type, 3565 hci_stack->le_advertisements_direct_address_type, 3566 hci_stack->le_advertisements_direct_address, 3567 hci_stack->le_advertisements_channel_map, 3568 hci_stack->le_advertisements_filter_policy); 3569 return true; 3570 } 3571 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3572 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3573 uint8_t adv_data_clean[31]; 3574 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3575 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3576 hci_stack->le_advertisements_data_len); 3577 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3578 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3579 return true; 3580 } 3581 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3582 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3583 uint8_t scan_data_clean[31]; 3584 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3585 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3586 hci_stack->le_scan_response_data_len); 3587 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3588 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3589 return true; 3590 } 3591 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3592 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3593 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3594 return true; 3595 } 3596 #endif 3597 3598 #ifdef ENABLE_LE_CENTRAL 3599 // 3600 // LE Whitelist Management 3601 // 3602 3603 // check if whitelist needs modification 3604 btstack_linked_list_iterator_t lit; 3605 int modification_pending = 0; 3606 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3607 while (btstack_linked_list_iterator_has_next(&lit)){ 3608 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3609 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3610 modification_pending = 1; 3611 break; 3612 } 3613 } 3614 3615 if (modification_pending){ 3616 // stop connnecting if modification pending 3617 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3618 hci_send_cmd(&hci_le_create_connection_cancel); 3619 return true; 3620 } 3621 3622 // add/remove entries 3623 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3624 while (btstack_linked_list_iterator_has_next(&lit)){ 3625 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3626 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3627 entry->state = LE_WHITELIST_ON_CONTROLLER; 3628 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3629 return true; 3630 } 3631 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3632 bd_addr_t address; 3633 bd_addr_type_t address_type = entry->address_type; 3634 (void)memcpy(address, entry->address, 6); 3635 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3636 btstack_memory_whitelist_entry_free(entry); 3637 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3638 return true; 3639 } 3640 } 3641 } 3642 3643 // start connecting 3644 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3645 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3646 bd_addr_t null_addr; 3647 memset(null_addr, 0, 6); 3648 hci_send_cmd(&hci_le_create_connection, 3649 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3650 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3651 1, // use whitelist 3652 0, // peer address type 3653 null_addr, // peer bd addr 3654 hci_stack->le_own_addr_type, // our addr type: 3655 hci_stack->le_connection_interval_min, // conn interval min 3656 hci_stack->le_connection_interval_max, // conn interval max 3657 hci_stack->le_connection_latency, // conn latency 3658 hci_stack->le_supervision_timeout, // conn latency 3659 hci_stack->le_minimum_ce_length, // min ce length 3660 hci_stack->le_maximum_ce_length // max ce length 3661 ); 3662 return true; 3663 } 3664 #endif 3665 return false; 3666 } 3667 #endif 3668 3669 static bool hci_run_general_pending_commmands(void){ 3670 btstack_linked_item_t * it; 3671 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3672 hci_connection_t * connection = (hci_connection_t *) it; 3673 3674 switch(connection->state){ 3675 case SEND_CREATE_CONNECTION: 3676 switch(connection->address_type){ 3677 #ifdef ENABLE_CLASSIC 3678 case BD_ADDR_TYPE_ACL: 3679 log_info("sending hci_create_connection"); 3680 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3681 break; 3682 #endif 3683 default: 3684 #ifdef ENABLE_BLE 3685 #ifdef ENABLE_LE_CENTRAL 3686 // track outgoing connection 3687 hci_stack->outgoing_addr_type = connection->address_type; 3688 (void)memcpy(hci_stack->outgoing_addr, 3689 connection->address, 6); 3690 log_info("sending hci_le_create_connection"); 3691 hci_send_cmd(&hci_le_create_connection, 3692 hci_stack->le_connection_scan_interval, // conn scan interval 3693 hci_stack->le_connection_scan_window, // conn scan windows 3694 0, // don't use whitelist 3695 connection->address_type, // peer address type 3696 connection->address, // peer bd addr 3697 hci_stack->le_own_addr_type, // our addr type: 3698 hci_stack->le_connection_interval_min, // conn interval min 3699 hci_stack->le_connection_interval_max, // conn interval max 3700 hci_stack->le_connection_latency, // conn latency 3701 hci_stack->le_supervision_timeout, // conn latency 3702 hci_stack->le_minimum_ce_length, // min ce length 3703 hci_stack->le_maximum_ce_length // max ce length 3704 ); 3705 connection->state = SENT_CREATE_CONNECTION; 3706 #endif 3707 #endif 3708 break; 3709 } 3710 return true; 3711 3712 #ifdef ENABLE_CLASSIC 3713 case RECEIVED_CONNECTION_REQUEST: 3714 connection->role = HCI_ROLE_SLAVE; 3715 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3716 log_info("sending hci_accept_connection_request"); 3717 connection->state = ACCEPTED_CONNECTION_REQUEST; 3718 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3719 } 3720 return true; 3721 #endif 3722 3723 #ifdef ENABLE_BLE 3724 #ifdef ENABLE_LE_CENTRAL 3725 case SEND_CANCEL_CONNECTION: 3726 connection->state = SENT_CANCEL_CONNECTION; 3727 hci_send_cmd(&hci_le_create_connection_cancel); 3728 return true; 3729 #endif 3730 #endif 3731 case SEND_DISCONNECT: 3732 connection->state = SENT_DISCONNECT; 3733 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3734 return true; 3735 3736 default: 3737 break; 3738 } 3739 3740 // no further commands if connection is about to get shut down 3741 if (connection->state == SENT_DISCONNECT) continue; 3742 3743 if (connection->authentication_flags & READ_RSSI){ 3744 connectionClearAuthenticationFlags(connection, READ_RSSI); 3745 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3746 return true; 3747 } 3748 3749 #ifdef ENABLE_CLASSIC 3750 3751 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3752 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3753 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3754 return true; 3755 } 3756 3757 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3758 log_info("responding to link key request"); 3759 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3760 link_key_t link_key; 3761 link_key_type_t link_key_type; 3762 if ( hci_stack->link_key_db 3763 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3764 && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level)){ 3765 connection->link_key_type = link_key_type; 3766 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3767 } else { 3768 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3769 } 3770 return true; 3771 } 3772 3773 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3774 log_info("denying to pin request"); 3775 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3776 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3777 return true; 3778 } 3779 3780 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3781 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3782 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3783 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3784 // tweak authentication requirements 3785 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3786 if (connection->bonding_flags & BONDING_DEDICATED){ 3787 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3788 } 3789 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3790 authreq |= 1; 3791 } 3792 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3793 } else { 3794 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3795 } 3796 return true; 3797 } 3798 3799 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3800 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3801 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3802 return true; 3803 } 3804 3805 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3806 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3807 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3808 return true; 3809 } 3810 3811 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 3812 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 3813 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3814 return true; 3815 } 3816 3817 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 3818 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3819 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 3820 return true; 3821 } 3822 3823 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3824 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3825 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3826 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3827 return true; 3828 } 3829 3830 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3831 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3832 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3833 return true; 3834 } 3835 3836 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3837 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3838 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3839 return true; 3840 } 3841 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3842 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3843 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3844 return true; 3845 } 3846 #endif 3847 3848 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3849 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3850 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3851 return true; 3852 } 3853 3854 #ifdef ENABLE_CLASSIC 3855 uint16_t sniff_min_interval; 3856 switch (connection->sniff_min_interval){ 3857 case 0: 3858 break; 3859 case 0xffff: 3860 connection->sniff_min_interval = 0; 3861 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3862 return true; 3863 default: 3864 sniff_min_interval = connection->sniff_min_interval; 3865 connection->sniff_min_interval = 0; 3866 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3867 return true; 3868 } 3869 #endif 3870 3871 #ifdef ENABLE_BLE 3872 switch (connection->le_con_parameter_update_state){ 3873 // response to L2CAP CON PARAMETER UPDATE REQUEST 3874 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3875 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3876 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3877 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3878 0x0000, 0xffff); 3879 return true; 3880 case CON_PARAMETER_UPDATE_REPLY: 3881 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3882 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3883 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3884 0x0000, 0xffff); 3885 return true; 3886 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3887 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3888 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3889 return true; 3890 default: 3891 break; 3892 } 3893 if (connection->le_phy_update_all_phys != 0xff){ 3894 uint8_t all_phys = connection->le_phy_update_all_phys; 3895 connection->le_phy_update_all_phys = 0xff; 3896 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); 3897 return true; 3898 } 3899 #endif 3900 } 3901 return false; 3902 } 3903 3904 static void hci_run(void){ 3905 3906 bool done; 3907 3908 // send continuation fragments first, as they block the prepared packet buffer 3909 done = hci_run_acl_fragments(); 3910 if (done) return; 3911 3912 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3913 // send host num completed packets next as they don't require num_cmd_packets > 0 3914 if (!hci_can_send_comand_packet_transport()) return; 3915 if (hci_stack->host_completed_packets){ 3916 hci_host_num_completed_packets(); 3917 return; 3918 } 3919 #endif 3920 3921 if (!hci_can_send_command_packet_now()) return; 3922 3923 // global/non-connection oriented commands 3924 3925 3926 #ifdef ENABLE_CLASSIC 3927 // general gap classic 3928 done = hci_run_general_gap_classic(); 3929 if (done) return; 3930 #endif 3931 3932 #ifdef ENABLE_BLE 3933 // general gap le 3934 done = hci_run_general_gap_le(); 3935 if (done) return; 3936 #endif 3937 3938 // send pending HCI commands 3939 done = hci_run_general_pending_commmands(); 3940 if (done) return; 3941 3942 // stack state sub statemachines 3943 hci_connection_t * connection; 3944 switch (hci_stack->state){ 3945 case HCI_STATE_INITIALIZING: 3946 hci_initializing_run(); 3947 break; 3948 3949 case HCI_STATE_HALTING: 3950 3951 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3952 switch (hci_stack->substate){ 3953 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3954 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3955 3956 #ifdef ENABLE_BLE 3957 #ifdef ENABLE_LE_CENTRAL 3958 // free whitelist entries 3959 { 3960 btstack_linked_list_iterator_t lit; 3961 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3962 while (btstack_linked_list_iterator_has_next(&lit)){ 3963 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3964 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3965 btstack_memory_whitelist_entry_free(entry); 3966 } 3967 } 3968 #endif 3969 #endif 3970 // close all open connections 3971 connection = (hci_connection_t *) hci_stack->connections; 3972 if (connection){ 3973 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3974 if (!hci_can_send_command_packet_now()) return; 3975 3976 // check state 3977 if (connection->state == SENT_DISCONNECT) return; 3978 connection->state = SENT_DISCONNECT; 3979 3980 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3981 3982 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3983 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3984 3985 // ... which would be ignored anyway as we shutdown (free) the connection now 3986 hci_shutdown_connection(connection); 3987 3988 // finally, send the disconnect command 3989 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3990 return; 3991 } 3992 3993 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3994 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3995 log_info("HCI_STATE_HALTING: wait 50 ms"); 3996 hci_stack->substate = HCI_HALTING_W4_TIMER; 3997 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3998 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3999 btstack_run_loop_add_timer(&hci_stack->timeout); 4000 break; 4001 } 4002 4003 /* fall through */ 4004 4005 case HCI_HALTING_CLOSE: 4006 log_info("HCI_STATE_HALTING, calling off"); 4007 4008 // switch mode 4009 hci_power_control_off(); 4010 4011 log_info("HCI_STATE_HALTING, emitting state"); 4012 hci_emit_state(); 4013 log_info("HCI_STATE_HALTING, done"); 4014 break; 4015 4016 case HCI_HALTING_W4_TIMER: 4017 // keep waiting 4018 4019 break; 4020 default: 4021 break; 4022 } 4023 4024 break; 4025 4026 case HCI_STATE_FALLING_ASLEEP: 4027 switch(hci_stack->substate) { 4028 case HCI_FALLING_ASLEEP_DISCONNECT: 4029 log_info("HCI_STATE_FALLING_ASLEEP"); 4030 // close all open connections 4031 connection = (hci_connection_t *) hci_stack->connections; 4032 4033 #ifdef HAVE_PLATFORM_IPHONE_OS 4034 // don't close connections, if H4 supports power management 4035 if (btstack_control_iphone_power_management_enabled()){ 4036 connection = NULL; 4037 } 4038 #endif 4039 if (connection){ 4040 4041 // send disconnect 4042 if (!hci_can_send_command_packet_now()) return; 4043 4044 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4045 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 4046 4047 // send disconnected event right away - causes higher layer connections to get closed, too. 4048 hci_shutdown_connection(connection); 4049 return; 4050 } 4051 4052 if (hci_classic_supported()){ 4053 // disable page and inquiry scan 4054 if (!hci_can_send_command_packet_now()) return; 4055 4056 log_info("HCI_STATE_HALTING, disabling inq scans"); 4057 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4058 4059 // continue in next sub state 4060 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4061 break; 4062 } 4063 4064 /* fall through */ 4065 4066 case HCI_FALLING_ASLEEP_COMPLETE: 4067 log_info("HCI_STATE_HALTING, calling sleep"); 4068 #ifdef HAVE_PLATFORM_IPHONE_OS 4069 // don't actually go to sleep, if H4 supports power management 4070 if (btstack_control_iphone_power_management_enabled()){ 4071 // SLEEP MODE reached 4072 hci_stack->state = HCI_STATE_SLEEPING; 4073 hci_emit_state(); 4074 break; 4075 } 4076 #endif 4077 // switch mode 4078 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4079 hci_emit_state(); 4080 break; 4081 4082 default: 4083 break; 4084 } 4085 break; 4086 4087 default: 4088 break; 4089 } 4090 } 4091 4092 int hci_send_cmd_packet(uint8_t *packet, int size){ 4093 // house-keeping 4094 4095 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 4096 hci_stack->loopback_mode = packet[3]; 4097 } 4098 4099 #ifdef ENABLE_CLASSIC 4100 bd_addr_t addr; 4101 hci_connection_t * conn; 4102 4103 // create_connection? 4104 if (IS_COMMAND(packet, hci_create_connection)){ 4105 reverse_bd_addr(&packet[3], addr); 4106 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4107 4108 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4109 if (!conn){ 4110 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4111 if (!conn){ 4112 // notify client that alloc failed 4113 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4114 return -1; // packet not sent to controller 4115 } 4116 conn->state = SEND_CREATE_CONNECTION; 4117 } 4118 log_info("conn state %u", conn->state); 4119 switch (conn->state){ 4120 // if connection active exists 4121 case OPEN: 4122 // and OPEN, emit connection complete command 4123 hci_emit_connection_complete(addr, conn->con_handle, 0); 4124 return -1; // packet not sent to controller 4125 case RECEIVED_DISCONNECTION_COMPLETE: 4126 // create connection triggered in disconnect complete event, let's do it now 4127 break; 4128 case SEND_CREATE_CONNECTION: 4129 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4130 break; 4131 default: 4132 // otherwise, just ignore as it is already in the open process 4133 return -1; // packet not sent to controller 4134 } 4135 conn->state = SENT_CREATE_CONNECTION; 4136 4137 // track outgoing connection 4138 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4139 (void)memcpy(hci_stack->outgoing_addr, addr, 6); 4140 } 4141 4142 else if (IS_COMMAND(packet, hci_link_key_request_reply)){ 4143 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4144 } 4145 else if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 4146 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4147 } 4148 4149 else if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 4150 if (hci_stack->link_key_db){ 4151 reverse_bd_addr(&packet[3], addr); 4152 hci_stack->link_key_db->delete_link_key(addr); 4153 } 4154 } 4155 4156 else if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 4157 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 4158 reverse_bd_addr(&packet[3], addr); 4159 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4160 if (conn){ 4161 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4162 } 4163 } 4164 4165 else if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 4166 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 4167 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 4168 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 4169 reverse_bd_addr(&packet[3], addr); 4170 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4171 if (conn){ 4172 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4173 } 4174 } 4175 4176 #ifdef ENABLE_SCO_OVER_HCI 4177 // setup_synchronous_connection? Voice setting at offset 22 4178 else if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 4179 // TODO: compare to current setting if sco connection already active 4180 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4181 } 4182 // accept_synchronus_connection? Voice setting at offset 18 4183 else if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 4184 // TODO: compare to current setting if sco connection already active 4185 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4186 } 4187 #endif 4188 #endif 4189 4190 #ifdef ENABLE_BLE 4191 else if (IS_COMMAND(packet, hci_le_set_random_address)){ 4192 hci_stack->le_random_address_set = 1; 4193 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4194 } 4195 #ifdef ENABLE_LE_PERIPHERAL 4196 else if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 4197 hci_stack->le_advertisements_active = packet[3]; 4198 } 4199 #endif 4200 #ifdef ENABLE_LE_CENTRAL 4201 else if (IS_COMMAND(packet, hci_le_create_connection)){ 4202 // white list used? 4203 uint8_t initiator_filter_policy = packet[7]; 4204 switch (initiator_filter_policy){ 4205 case 0: 4206 // whitelist not used 4207 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4208 break; 4209 case 1: 4210 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4211 break; 4212 default: 4213 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4214 break; 4215 } 4216 } 4217 else if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4218 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4219 } 4220 #endif 4221 #endif 4222 4223 hci_stack->num_cmd_packets--; 4224 4225 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4226 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4227 } 4228 4229 // disconnect because of security block 4230 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4231 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4232 if (!connection) return; 4233 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4234 } 4235 4236 4237 // Configure Secure Simple Pairing 4238 4239 #ifdef ENABLE_CLASSIC 4240 4241 // enable will enable SSP during init 4242 void gap_ssp_set_enable(int enable){ 4243 hci_stack->ssp_enable = enable; 4244 } 4245 4246 static int hci_local_ssp_activated(void){ 4247 return gap_ssp_supported() && hci_stack->ssp_enable; 4248 } 4249 4250 // if set, BTstack will respond to io capability request using authentication requirement 4251 void gap_ssp_set_io_capability(int io_capability){ 4252 hci_stack->ssp_io_capability = io_capability; 4253 } 4254 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4255 hci_stack->ssp_authentication_requirement = authentication_requirement; 4256 } 4257 4258 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4259 void gap_ssp_set_auto_accept(int auto_accept){ 4260 hci_stack->ssp_auto_accept = auto_accept; 4261 } 4262 4263 void gap_secure_connections_enable(bool enable){ 4264 hci_stack->secure_connections_enable = enable; 4265 } 4266 4267 #endif 4268 4269 // va_list part of hci_send_cmd 4270 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4271 if (!hci_can_send_command_packet_now()){ 4272 log_error("hci_send_cmd called but cannot send packet now"); 4273 return 0; 4274 } 4275 4276 // for HCI INITIALIZATION 4277 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4278 hci_stack->last_cmd_opcode = cmd->opcode; 4279 4280 hci_reserve_packet_buffer(); 4281 uint8_t * packet = hci_stack->hci_packet_buffer; 4282 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4283 int err = hci_send_cmd_packet(packet, size); 4284 4285 // release packet buffer on error or for synchronous transport implementations 4286 if ((err < 0) || hci_transport_synchronous()){ 4287 hci_release_packet_buffer(); 4288 hci_emit_transport_packet_sent(); 4289 } 4290 4291 return err; 4292 } 4293 4294 /** 4295 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4296 */ 4297 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4298 va_list argptr; 4299 va_start(argptr, cmd); 4300 int res = hci_send_cmd_va_arg(cmd, argptr); 4301 va_end(argptr); 4302 return res; 4303 } 4304 4305 // Create various non-HCI events. 4306 // TODO: generalize, use table similar to hci_create_command 4307 4308 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4309 // dump packet 4310 if (dump) { 4311 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4312 } 4313 4314 // dispatch to all event handlers 4315 btstack_linked_list_iterator_t it; 4316 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4317 while (btstack_linked_list_iterator_has_next(&it)){ 4318 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4319 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4320 } 4321 } 4322 4323 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4324 if (!hci_stack->acl_packet_handler) return; 4325 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4326 } 4327 4328 #ifdef ENABLE_CLASSIC 4329 static void hci_notify_if_sco_can_send_now(void){ 4330 // notify SCO sender if waiting 4331 if (!hci_stack->sco_waiting_for_can_send_now) return; 4332 if (hci_can_send_sco_packet_now()){ 4333 hci_stack->sco_waiting_for_can_send_now = 0; 4334 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4335 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4336 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4337 } 4338 } 4339 4340 // parsing end emitting has been merged to reduce code size 4341 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4342 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4343 4344 uint8_t * eir_data; 4345 ad_context_t context; 4346 const uint8_t * name; 4347 uint8_t name_len; 4348 4349 if (size < 3) return; 4350 4351 int event_type = hci_event_packet_get_type(packet); 4352 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4353 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4354 4355 switch (event_type){ 4356 case HCI_EVENT_INQUIRY_RESULT: 4357 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4358 if (size != (3 + (num_responses * 14))) return; 4359 break; 4360 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4361 if (size != 257) return; 4362 if (num_responses != 1) return; 4363 break; 4364 default: 4365 return; 4366 } 4367 4368 // event[1] is set at the end 4369 int i; 4370 for (i=0; i<num_responses;i++){ 4371 memset(event, 0, sizeof(event)); 4372 event[0] = GAP_EVENT_INQUIRY_RESULT; 4373 uint8_t event_size = 18; // if name is not set by EIR 4374 4375 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4376 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4377 (void)memcpy(&event[9], 4378 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4379 3); // class of device 4380 (void)memcpy(&event[12], 4381 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4382 2); // clock offset 4383 4384 switch (event_type){ 4385 case HCI_EVENT_INQUIRY_RESULT: 4386 // 14,15,16,17 = 0, size 18 4387 break; 4388 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4389 event[14] = 1; 4390 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4391 // 16,17 = 0, size 18 4392 break; 4393 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4394 event[14] = 1; 4395 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4396 // EIR packets only contain a single inquiry response 4397 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4398 name = NULL; 4399 // Iterate over EIR data 4400 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4401 uint8_t data_type = ad_iterator_get_data_type(&context); 4402 uint8_t data_size = ad_iterator_get_data_len(&context); 4403 const uint8_t * data = ad_iterator_get_data(&context); 4404 // Prefer Complete Local Name over Shortend Local Name 4405 switch (data_type){ 4406 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4407 if (name) continue; 4408 /* fall through */ 4409 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4410 name = data; 4411 name_len = data_size; 4412 break; 4413 default: 4414 break; 4415 } 4416 } 4417 if (name){ 4418 event[16] = 1; 4419 // truncate name if needed 4420 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4421 event[17] = len; 4422 (void)memcpy(&event[18], name, len); 4423 event_size += len; 4424 } 4425 break; 4426 } 4427 event[1] = event_size - 2; 4428 hci_emit_event(event, event_size, 1); 4429 } 4430 } 4431 #endif 4432 4433 void hci_emit_state(void){ 4434 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4435 uint8_t event[3]; 4436 event[0] = BTSTACK_EVENT_STATE; 4437 event[1] = sizeof(event) - 2; 4438 event[2] = hci_stack->state; 4439 hci_emit_event(event, sizeof(event), 1); 4440 } 4441 4442 #ifdef ENABLE_CLASSIC 4443 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4444 uint8_t event[13]; 4445 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4446 event[1] = sizeof(event) - 2; 4447 event[2] = status; 4448 little_endian_store_16(event, 3, con_handle); 4449 reverse_bd_addr(address, &event[5]); 4450 event[11] = 1; // ACL connection 4451 event[12] = 0; // encryption disabled 4452 hci_emit_event(event, sizeof(event), 1); 4453 } 4454 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4455 if (disable_l2cap_timeouts) return; 4456 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4457 uint8_t event[4]; 4458 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4459 event[1] = sizeof(event) - 2; 4460 little_endian_store_16(event, 2, conn->con_handle); 4461 hci_emit_event(event, sizeof(event), 1); 4462 } 4463 #endif 4464 4465 #ifdef ENABLE_BLE 4466 #ifdef ENABLE_LE_CENTRAL 4467 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4468 uint8_t event[21]; 4469 event[0] = HCI_EVENT_LE_META; 4470 event[1] = sizeof(event) - 2; 4471 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4472 event[3] = status; 4473 little_endian_store_16(event, 4, con_handle); 4474 event[6] = 0; // TODO: role 4475 event[7] = address_type; 4476 reverse_bd_addr(address, &event[8]); 4477 little_endian_store_16(event, 14, 0); // interval 4478 little_endian_store_16(event, 16, 0); // latency 4479 little_endian_store_16(event, 18, 0); // supervision timeout 4480 event[20] = 0; // master clock accuracy 4481 hci_emit_event(event, sizeof(event), 1); 4482 } 4483 #endif 4484 #endif 4485 4486 static void hci_emit_transport_packet_sent(void){ 4487 // notify upper stack that it might be possible to send again 4488 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4489 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4490 } 4491 4492 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4493 uint8_t event[6]; 4494 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4495 event[1] = sizeof(event) - 2; 4496 event[2] = 0; // status = OK 4497 little_endian_store_16(event, 3, con_handle); 4498 event[5] = reason; 4499 hci_emit_event(event, sizeof(event), 1); 4500 } 4501 4502 static void hci_emit_nr_connections_changed(void){ 4503 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4504 uint8_t event[3]; 4505 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4506 event[1] = sizeof(event) - 2; 4507 event[2] = nr_hci_connections(); 4508 hci_emit_event(event, sizeof(event), 1); 4509 } 4510 4511 static void hci_emit_hci_open_failed(void){ 4512 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4513 uint8_t event[2]; 4514 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4515 event[1] = sizeof(event) - 2; 4516 hci_emit_event(event, sizeof(event), 1); 4517 } 4518 4519 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4520 log_info("hci_emit_dedicated_bonding_result %u ", status); 4521 uint8_t event[9]; 4522 int pos = 0; 4523 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4524 event[pos++] = sizeof(event) - 2; 4525 event[pos++] = status; 4526 reverse_bd_addr(address, &event[pos]); 4527 hci_emit_event(event, sizeof(event), 1); 4528 } 4529 4530 4531 #ifdef ENABLE_CLASSIC 4532 4533 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4534 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4535 uint8_t event[5]; 4536 int pos = 0; 4537 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4538 event[pos++] = sizeof(event) - 2; 4539 little_endian_store_16(event, 2, con_handle); 4540 pos += 2; 4541 event[pos++] = level; 4542 hci_emit_event(event, sizeof(event), 1); 4543 } 4544 4545 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4546 if (!connection) return LEVEL_0; 4547 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4548 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4549 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4550 // LEVEL 4 always requires 128 bit encrytion key size 4551 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4552 security_level = LEVEL_3; 4553 } 4554 return security_level; 4555 } 4556 4557 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4558 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4559 uint8_t event[3]; 4560 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4561 event[1] = sizeof(event) - 2; 4562 event[2] = enabled; 4563 hci_emit_event(event, sizeof(event), 1); 4564 } 4565 4566 // query if remote side supports eSCO 4567 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4568 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4569 if (!connection) return 0; 4570 return (connection->remote_supported_features[0] & 1) != 0; 4571 } 4572 4573 static bool hci_ssp_supported(hci_connection_t * connection){ 4574 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4575 return (connection->bonding_flags & mask) == mask; 4576 } 4577 4578 // query if remote side supports SSP 4579 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4580 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4581 if (!connection) return 0; 4582 return hci_ssp_supported(connection) ? 1 : 0; 4583 } 4584 4585 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4586 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4587 } 4588 4589 // GAP API 4590 /** 4591 * @bbrief enable/disable bonding. default is enabled 4592 * @praram enabled 4593 */ 4594 void gap_set_bondable_mode(int enable){ 4595 hci_stack->bondable = enable ? 1 : 0; 4596 } 4597 /** 4598 * @brief Get bondable mode. 4599 * @return 1 if bondable 4600 */ 4601 int gap_get_bondable_mode(void){ 4602 return hci_stack->bondable; 4603 } 4604 4605 /** 4606 * @brief map link keys to security levels 4607 */ 4608 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4609 switch (link_key_type){ 4610 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4611 return LEVEL_4; 4612 case COMBINATION_KEY: 4613 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4614 return LEVEL_3; 4615 default: 4616 return LEVEL_2; 4617 } 4618 } 4619 4620 /** 4621 * @brief map link keys to secure connection yes/no 4622 */ 4623 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4624 switch (link_key_type){ 4625 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4626 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4627 return 1; 4628 default: 4629 return 0; 4630 } 4631 } 4632 4633 /** 4634 * @brief map link keys to authenticated 4635 */ 4636 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4637 switch (link_key_type){ 4638 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4639 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4640 return 1; 4641 default: 4642 return 0; 4643 } 4644 } 4645 4646 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4647 log_info("gap_mitm_protection_required_for_security_level %u", level); 4648 return level > LEVEL_2; 4649 } 4650 4651 /** 4652 * @brief get current security level 4653 */ 4654 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4655 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4656 if (!connection) return LEVEL_0; 4657 return gap_security_level_for_connection(connection); 4658 } 4659 4660 /** 4661 * @brief request connection to device to 4662 * @result GAP_AUTHENTICATION_RESULT 4663 */ 4664 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4665 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4666 if (!connection){ 4667 hci_emit_security_level(con_handle, LEVEL_0); 4668 return; 4669 } 4670 gap_security_level_t current_level = gap_security_level(con_handle); 4671 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4672 requested_level, connection->requested_security_level, current_level); 4673 4674 // assumption: earlier requested security higher than current level => security request is active 4675 if (current_level < connection->requested_security_level){ 4676 if (connection->requested_security_level < requested_level){ 4677 // increase requested level as new level is higher 4678 4679 // TODO: handle re-authentication when done 4680 4681 connection->requested_security_level = requested_level; 4682 } 4683 return; 4684 } 4685 4686 // no request active, notify if security sufficient 4687 if (requested_level <= current_level){ 4688 hci_emit_security_level(con_handle, current_level); 4689 return; 4690 } 4691 4692 // start pairing to increase security level 4693 connection->requested_security_level = requested_level; 4694 4695 #if 0 4696 // sending encryption request without a link key results in an error. 4697 // TODO: figure out how to use it properly 4698 4699 // would enabling ecnryption suffice (>= LEVEL_2)? 4700 if (hci_stack->link_key_db){ 4701 link_key_type_t link_key_type; 4702 link_key_t link_key; 4703 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4704 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4705 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4706 return; 4707 } 4708 } 4709 } 4710 #endif 4711 4712 // start to authenticate connection 4713 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4714 hci_run(); 4715 } 4716 4717 /** 4718 * @brief start dedicated bonding with device. disconnect after bonding 4719 * @param device 4720 * @param request MITM protection 4721 * @result GAP_DEDICATED_BONDING_COMPLETE 4722 */ 4723 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4724 4725 // create connection state machine 4726 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4727 4728 if (!connection){ 4729 return BTSTACK_MEMORY_ALLOC_FAILED; 4730 } 4731 4732 // delete linkn key 4733 gap_drop_link_key_for_bd_addr(device); 4734 4735 // configure LEVEL_2/3, dedicated bonding 4736 connection->state = SEND_CREATE_CONNECTION; 4737 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4738 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4739 connection->bonding_flags = BONDING_DEDICATED; 4740 4741 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4742 4743 // handle: connnection failure (connection complete != ok) 4744 // handle: authentication failure 4745 // handle: disconnect on done 4746 4747 hci_run(); 4748 4749 return 0; 4750 } 4751 #endif 4752 4753 void gap_set_local_name(const char * local_name){ 4754 hci_stack->local_name = local_name; 4755 } 4756 4757 4758 #ifdef ENABLE_BLE 4759 4760 #ifdef ENABLE_LE_CENTRAL 4761 void gap_start_scan(void){ 4762 hci_stack->le_scanning_enabled = 1; 4763 hci_run(); 4764 } 4765 4766 void gap_stop_scan(void){ 4767 hci_stack->le_scanning_enabled = 0; 4768 hci_run(); 4769 } 4770 4771 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4772 hci_stack->le_scan_type = scan_type; 4773 hci_stack->le_scan_interval = scan_interval; 4774 hci_stack->le_scan_window = scan_window; 4775 hci_run(); 4776 } 4777 4778 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4779 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4780 if (!conn){ 4781 log_info("gap_connect: no connection exists yet, creating context"); 4782 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4783 if (!conn){ 4784 // notify client that alloc failed 4785 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4786 log_info("gap_connect: failed to alloc hci_connection_t"); 4787 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4788 } 4789 conn->state = SEND_CREATE_CONNECTION; 4790 log_info("gap_connect: send create connection next"); 4791 hci_run(); 4792 return ERROR_CODE_SUCCESS; 4793 } 4794 4795 if (!hci_is_le_connection(conn) || 4796 (conn->state == SEND_CREATE_CONNECTION) || 4797 (conn->state == SENT_CREATE_CONNECTION)) { 4798 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4799 log_error("gap_connect: classic connection or connect is already being created"); 4800 return GATT_CLIENT_IN_WRONG_STATE; 4801 } 4802 4803 // check if connection was just disconnected 4804 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4805 log_info("gap_connect: send create connection (again)"); 4806 conn->state = SEND_CREATE_CONNECTION; 4807 hci_run(); 4808 return ERROR_CODE_SUCCESS; 4809 } 4810 4811 log_info("gap_connect: context exists with state %u", conn->state); 4812 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4813 hci_run(); 4814 return ERROR_CODE_SUCCESS; 4815 } 4816 4817 // @assumption: only a single outgoing LE Connection exists 4818 static hci_connection_t * gap_get_outgoing_connection(void){ 4819 btstack_linked_item_t *it; 4820 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4821 hci_connection_t * conn = (hci_connection_t *) it; 4822 if (!hci_is_le_connection(conn)) continue; 4823 switch (conn->state){ 4824 case SEND_CREATE_CONNECTION: 4825 case SENT_CREATE_CONNECTION: 4826 case SENT_CANCEL_CONNECTION: 4827 return conn; 4828 default: 4829 break; 4830 }; 4831 } 4832 return NULL; 4833 } 4834 4835 uint8_t gap_connect_cancel(void){ 4836 hci_connection_t * conn = gap_get_outgoing_connection(); 4837 if (!conn) return 0; 4838 switch (conn->state){ 4839 case SEND_CREATE_CONNECTION: 4840 // skip sending create connection and emit event instead 4841 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4842 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4843 btstack_memory_hci_connection_free( conn ); 4844 break; 4845 case SENT_CREATE_CONNECTION: 4846 // request to send cancel connection 4847 conn->state = SEND_CANCEL_CONNECTION; 4848 hci_run(); 4849 break; 4850 default: 4851 break; 4852 } 4853 return 0; 4854 } 4855 #endif 4856 4857 #ifdef ENABLE_LE_CENTRAL 4858 /** 4859 * @brief Set connection parameters for outgoing connections 4860 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4861 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4862 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4863 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4864 * @param conn_latency, default: 4 4865 * @param supervision_timeout (unit: 10ms), default: 720 ms 4866 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4867 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4868 */ 4869 4870 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4871 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4872 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4873 hci_stack->le_connection_scan_interval = conn_scan_interval; 4874 hci_stack->le_connection_scan_window = conn_scan_window; 4875 hci_stack->le_connection_interval_min = conn_interval_min; 4876 hci_stack->le_connection_interval_max = conn_interval_max; 4877 hci_stack->le_connection_latency = conn_latency; 4878 hci_stack->le_supervision_timeout = supervision_timeout; 4879 hci_stack->le_minimum_ce_length = min_ce_length; 4880 hci_stack->le_maximum_ce_length = max_ce_length; 4881 } 4882 #endif 4883 4884 /** 4885 * @brief Updates the connection parameters for a given LE connection 4886 * @param handle 4887 * @param conn_interval_min (unit: 1.25ms) 4888 * @param conn_interval_max (unit: 1.25ms) 4889 * @param conn_latency 4890 * @param supervision_timeout (unit: 10ms) 4891 * @returns 0 if ok 4892 */ 4893 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4894 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4895 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4896 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4897 connection->le_conn_interval_min = conn_interval_min; 4898 connection->le_conn_interval_max = conn_interval_max; 4899 connection->le_conn_latency = conn_latency; 4900 connection->le_supervision_timeout = supervision_timeout; 4901 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4902 hci_run(); 4903 return 0; 4904 } 4905 4906 /** 4907 * @brief Request an update of the connection parameter for a given LE connection 4908 * @param handle 4909 * @param conn_interval_min (unit: 1.25ms) 4910 * @param conn_interval_max (unit: 1.25ms) 4911 * @param conn_latency 4912 * @param supervision_timeout (unit: 10ms) 4913 * @returns 0 if ok 4914 */ 4915 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4916 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4917 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4918 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4919 connection->le_conn_interval_min = conn_interval_min; 4920 connection->le_conn_interval_max = conn_interval_max; 4921 connection->le_conn_latency = conn_latency; 4922 connection->le_supervision_timeout = supervision_timeout; 4923 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4924 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 4925 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 4926 return 0; 4927 } 4928 4929 #ifdef ENABLE_LE_PERIPHERAL 4930 4931 static void gap_advertisments_changed(void){ 4932 // disable advertisements before updating adv, scan data, or adv params 4933 if (hci_stack->le_advertisements_active){ 4934 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4935 } 4936 hci_run(); 4937 } 4938 4939 /** 4940 * @brief Set Advertisement Data 4941 * @param advertising_data_length 4942 * @param advertising_data (max 31 octets) 4943 * @note data is not copied, pointer has to stay valid 4944 */ 4945 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4946 hci_stack->le_advertisements_data_len = advertising_data_length; 4947 hci_stack->le_advertisements_data = advertising_data; 4948 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4949 gap_advertisments_changed(); 4950 } 4951 4952 /** 4953 * @brief Set Scan Response Data 4954 * @param advertising_data_length 4955 * @param advertising_data (max 31 octets) 4956 * @note data is not copied, pointer has to stay valid 4957 */ 4958 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4959 hci_stack->le_scan_response_data_len = scan_response_data_length; 4960 hci_stack->le_scan_response_data = scan_response_data; 4961 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4962 gap_advertisments_changed(); 4963 } 4964 4965 /** 4966 * @brief Set Advertisement Parameters 4967 * @param adv_int_min 4968 * @param adv_int_max 4969 * @param adv_type 4970 * @param direct_address_type 4971 * @param direct_address 4972 * @param channel_map 4973 * @param filter_policy 4974 * 4975 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4976 */ 4977 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4978 uint8_t direct_address_typ, bd_addr_t direct_address, 4979 uint8_t channel_map, uint8_t filter_policy) { 4980 4981 hci_stack->le_advertisements_interval_min = adv_int_min; 4982 hci_stack->le_advertisements_interval_max = adv_int_max; 4983 hci_stack->le_advertisements_type = adv_type; 4984 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4985 hci_stack->le_advertisements_channel_map = channel_map; 4986 hci_stack->le_advertisements_filter_policy = filter_policy; 4987 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 4988 6); 4989 4990 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4991 gap_advertisments_changed(); 4992 } 4993 4994 /** 4995 * @brief Enable/Disable Advertisements 4996 * @param enabled 4997 */ 4998 void gap_advertisements_enable(int enabled){ 4999 hci_stack->le_advertisements_enabled = enabled; 5000 if (enabled && !hci_stack->le_advertisements_active){ 5001 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 5002 } 5003 if (!enabled && hci_stack->le_advertisements_active){ 5004 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 5005 } 5006 hci_run(); 5007 } 5008 5009 #endif 5010 5011 void hci_le_set_own_address_type(uint8_t own_address_type){ 5012 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5013 if (own_address_type == hci_stack->le_own_addr_type) return; 5014 hci_stack->le_own_addr_type = own_address_type; 5015 5016 #ifdef ENABLE_LE_PERIPHERAL 5017 // update advertisement parameters, too 5018 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5019 gap_advertisments_changed(); 5020 #endif 5021 #ifdef ENABLE_LE_CENTRAL 5022 // note: we don't update scan parameters or modify ongoing connection attempts 5023 #endif 5024 } 5025 5026 #endif 5027 5028 uint8_t gap_disconnect(hci_con_handle_t handle){ 5029 hci_connection_t * conn = hci_connection_for_handle(handle); 5030 if (!conn){ 5031 hci_emit_disconnection_complete(handle, 0); 5032 return 0; 5033 } 5034 // ignore if already disconnected 5035 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5036 return 0; 5037 } 5038 conn->state = SEND_DISCONNECT; 5039 hci_run(); 5040 return 0; 5041 } 5042 5043 int gap_read_rssi(hci_con_handle_t con_handle){ 5044 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5045 if (hci_connection == NULL) return 0; 5046 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5047 hci_run(); 5048 return 1; 5049 } 5050 5051 /** 5052 * @brief Get connection type 5053 * @param con_handle 5054 * @result connection_type 5055 */ 5056 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5057 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5058 if (!conn) return GAP_CONNECTION_INVALID; 5059 switch (conn->address_type){ 5060 case BD_ADDR_TYPE_LE_PUBLIC: 5061 case BD_ADDR_TYPE_LE_RANDOM: 5062 return GAP_CONNECTION_LE; 5063 case BD_ADDR_TYPE_SCO: 5064 return GAP_CONNECTION_SCO; 5065 case BD_ADDR_TYPE_ACL: 5066 return GAP_CONNECTION_ACL; 5067 default: 5068 return GAP_CONNECTION_INVALID; 5069 } 5070 } 5071 5072 #ifdef ENABLE_BLE 5073 5074 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){ 5075 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5076 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5077 5078 conn->le_phy_update_all_phys = all_phys; 5079 conn->le_phy_update_tx_phys = tx_phys; 5080 conn->le_phy_update_rx_phys = rx_phys; 5081 conn->le_phy_update_phy_options = phy_options; 5082 5083 hci_run(); 5084 5085 return 0; 5086 } 5087 5088 #ifdef ENABLE_LE_CENTRAL 5089 /** 5090 * @brief Auto Connection Establishment - Start Connecting to device 5091 * @param address_typ 5092 * @param address 5093 * @returns 0 if ok 5094 */ 5095 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 5096 // check capacity 5097 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 5098 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 5099 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5100 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5101 entry->address_type = address_type; 5102 (void)memcpy(entry->address, address, 6); 5103 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5104 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5105 hci_run(); 5106 return 0; 5107 } 5108 5109 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5110 btstack_linked_list_iterator_t it; 5111 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5112 while (btstack_linked_list_iterator_has_next(&it)){ 5113 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5114 if (entry->address_type != address_type) continue; 5115 if (memcmp(entry->address, address, 6) != 0) continue; 5116 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5117 // remove from controller if already present 5118 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5119 continue; 5120 } 5121 // direclty remove entry from whitelist 5122 btstack_linked_list_iterator_remove(&it); 5123 btstack_memory_whitelist_entry_free(entry); 5124 } 5125 } 5126 5127 /** 5128 * @brief Auto Connection Establishment - Stop Connecting to device 5129 * @param address_typ 5130 * @param address 5131 * @returns 0 if ok 5132 */ 5133 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5134 hci_remove_from_whitelist(address_type, address); 5135 hci_run(); 5136 return 0; 5137 } 5138 5139 /** 5140 * @brief Auto Connection Establishment - Stop everything 5141 * @note Convenience function to stop all active auto connection attempts 5142 */ 5143 void gap_auto_connection_stop_all(void){ 5144 btstack_linked_list_iterator_t it; 5145 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5146 while (btstack_linked_list_iterator_has_next(&it)){ 5147 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5148 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5149 // remove from controller if already present 5150 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5151 continue; 5152 } 5153 // directly remove entry from whitelist 5154 btstack_linked_list_iterator_remove(&it); 5155 btstack_memory_whitelist_entry_free(entry); 5156 } 5157 hci_run(); 5158 } 5159 5160 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5161 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5162 if (!conn) return 0; 5163 return conn->le_connection_interval; 5164 } 5165 #endif 5166 #endif 5167 5168 #ifdef ENABLE_CLASSIC 5169 /** 5170 * @brief Set Extended Inquiry Response data 5171 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5172 * @note has to be done before stack starts up 5173 */ 5174 void gap_set_extended_inquiry_response(const uint8_t * data){ 5175 hci_stack->eir_data = data; 5176 } 5177 5178 /** 5179 * @brief Start GAP Classic Inquiry 5180 * @param duration in 1.28s units 5181 * @return 0 if ok 5182 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5183 */ 5184 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5185 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5186 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5187 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5188 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5189 } 5190 hci_stack->inquiry_state = duration_in_1280ms_units; 5191 hci_run(); 5192 return 0; 5193 } 5194 5195 /** 5196 * @brief Stop GAP Classic Inquiry 5197 * @returns 0 if ok 5198 */ 5199 int gap_inquiry_stop(void){ 5200 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5201 // emit inquiry complete event, before it even started 5202 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5203 hci_emit_event(event, sizeof(event), 1); 5204 return 0; 5205 } 5206 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5207 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5208 hci_run(); 5209 return 0; 5210 } 5211 5212 5213 /** 5214 * @brief Remote Name Request 5215 * @param addr 5216 * @param page_scan_repetition_mode 5217 * @param clock_offset only used when bit 15 is set 5218 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5219 */ 5220 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5221 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5222 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5223 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5224 hci_stack->remote_name_clock_offset = clock_offset; 5225 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5226 hci_run(); 5227 return 0; 5228 } 5229 5230 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5231 hci_stack->gap_pairing_state = state; 5232 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5233 hci_run(); 5234 return 0; 5235 } 5236 5237 /** 5238 * @brief Legacy Pairing Pin Code Response 5239 * @param addr 5240 * @param pin 5241 * @return 0 if ok 5242 */ 5243 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5244 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5245 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5246 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5247 } 5248 5249 /** 5250 * @brief Abort Legacy Pairing 5251 * @param addr 5252 * @param pin 5253 * @return 0 if ok 5254 */ 5255 int gap_pin_code_negative(bd_addr_t addr){ 5256 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5257 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5258 } 5259 5260 /** 5261 * @brief SSP Passkey Response 5262 * @param addr 5263 * @param passkey 5264 * @return 0 if ok 5265 */ 5266 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5267 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5268 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5269 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5270 } 5271 5272 /** 5273 * @brief Abort SSP Passkey Entry/Pairing 5274 * @param addr 5275 * @param pin 5276 * @return 0 if ok 5277 */ 5278 int gap_ssp_passkey_negative(bd_addr_t addr){ 5279 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5280 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5281 } 5282 5283 /** 5284 * @brief Accept SSP Numeric Comparison 5285 * @param addr 5286 * @param passkey 5287 * @return 0 if ok 5288 */ 5289 int gap_ssp_confirmation_response(bd_addr_t addr){ 5290 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5291 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5292 } 5293 5294 /** 5295 * @brief Abort SSP Numeric Comparison/Pairing 5296 * @param addr 5297 * @param pin 5298 * @return 0 if ok 5299 */ 5300 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5301 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5302 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5303 } 5304 5305 /** 5306 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5307 * @param inquiry_mode see bluetooth_defines.h 5308 */ 5309 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5310 hci_stack->inquiry_mode = mode; 5311 } 5312 5313 /** 5314 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5315 */ 5316 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5317 hci_stack->sco_voice_setting = voice_setting; 5318 } 5319 5320 /** 5321 * @brief Get SCO Voice Setting 5322 * @return current voice setting 5323 */ 5324 uint16_t hci_get_sco_voice_setting(void){ 5325 return hci_stack->sco_voice_setting; 5326 } 5327 5328 static int hci_have_usb_transport(void){ 5329 if (!hci_stack->hci_transport) return 0; 5330 const char * transport_name = hci_stack->hci_transport->name; 5331 if (!transport_name) return 0; 5332 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5333 } 5334 5335 /** @brief Get SCO packet length for current SCO Voice setting 5336 * @note Using SCO packets of the exact length is required for USB transfer 5337 * @return Length of SCO packets in bytes (not audio frames) 5338 */ 5339 int hci_get_sco_packet_length(void){ 5340 int sco_packet_length = 0; 5341 5342 #ifdef ENABLE_SCO_OVER_HCI 5343 5344 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5345 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5346 5347 if (hci_have_usb_transport()){ 5348 // see Core Spec for H2 USB Transfer. 5349 // 3 byte SCO header + 24 bytes per connection 5350 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5351 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5352 } else { 5353 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5354 sco_packet_length = 3 + 60 * multiplier; 5355 // assert that it still fits inside an SCO buffer 5356 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5357 sco_packet_length = 3 + 60; 5358 } 5359 } 5360 #endif 5361 return sco_packet_length; 5362 } 5363 5364 /** 5365 * @brief Sets the master/slave policy 5366 * @param policy (0: attempt to become master, 1: let connecting device decide) 5367 */ 5368 void hci_set_master_slave_policy(uint8_t policy){ 5369 hci_stack->master_slave_policy = policy; 5370 } 5371 5372 #endif 5373 5374 HCI_STATE hci_get_state(void){ 5375 return hci_stack->state; 5376 } 5377 5378 #ifdef ENABLE_CLASSIC 5379 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5380 hci_stack->gap_classic_accept_callback = accept_callback; 5381 } 5382 #endif 5383 5384 /** 5385 * @brief Set callback for Bluetooth Hardware Error 5386 */ 5387 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5388 hci_stack->hardware_error_callback = fn; 5389 } 5390 5391 void hci_disconnect_all(void){ 5392 btstack_linked_list_iterator_t it; 5393 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5394 while (btstack_linked_list_iterator_has_next(&it)){ 5395 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5396 if (con->state == SENT_DISCONNECT) continue; 5397 con->state = SEND_DISCONNECT; 5398 } 5399 hci_run(); 5400 } 5401 5402 uint16_t hci_get_manufacturer(void){ 5403 return hci_stack->manufacturer; 5404 } 5405 5406 #ifdef ENABLE_BLE 5407 5408 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5409 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5410 if (!hci_con) return NULL; 5411 return &hci_con->sm_connection; 5412 } 5413 5414 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5415 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5416 5417 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5418 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5419 if (hci_connection == NULL) return 0; 5420 if (hci_is_le_connection(hci_connection)){ 5421 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5422 if (sm_conn->sm_connection_encrypted) { 5423 return sm_conn->sm_actual_encryption_key_size; 5424 } 5425 } 5426 #ifdef ENABLE_CLASSIC 5427 else { 5428 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5429 return hci_connection->encryption_key_size; 5430 } 5431 } 5432 #endif 5433 return 0; 5434 } 5435 5436 int gap_authenticated(hci_con_handle_t con_handle){ 5437 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5438 if (hci_connection == NULL) return 0; 5439 5440 switch (hci_connection->address_type){ 5441 case BD_ADDR_TYPE_LE_PUBLIC: 5442 case BD_ADDR_TYPE_LE_RANDOM: 5443 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5444 return hci_connection->sm_connection.sm_connection_authenticated; 5445 #ifdef ENABLE_CLASSIC 5446 case BD_ADDR_TYPE_SCO: 5447 case BD_ADDR_TYPE_ACL: 5448 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5449 #endif 5450 default: 5451 return 0; 5452 } 5453 } 5454 5455 int gap_secure_connection(hci_con_handle_t con_handle){ 5456 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5457 if (hci_connection == NULL) return 0; 5458 5459 switch (hci_connection->address_type){ 5460 case BD_ADDR_TYPE_LE_PUBLIC: 5461 case BD_ADDR_TYPE_LE_RANDOM: 5462 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5463 return hci_connection->sm_connection.sm_connection_sc; 5464 #ifdef ENABLE_CLASSIC 5465 case BD_ADDR_TYPE_SCO: 5466 case BD_ADDR_TYPE_ACL: 5467 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5468 #endif 5469 default: 5470 return 0; 5471 } 5472 } 5473 5474 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5475 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5476 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5477 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5478 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5479 return sm_conn->sm_connection_authorization_state; 5480 } 5481 #endif 5482 5483 #ifdef ENABLE_CLASSIC 5484 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){ 5485 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5486 if (!conn) return GAP_CONNECTION_INVALID; 5487 conn->sniff_min_interval = sniff_min_interval; 5488 conn->sniff_max_interval = sniff_max_interval; 5489 conn->sniff_attempt = sniff_attempt; 5490 conn->sniff_timeout = sniff_timeout; 5491 hci_run(); 5492 return 0; 5493 } 5494 5495 /** 5496 * @brief Exit Sniff mode 5497 * @param con_handle 5498 @ @return 0 if ok 5499 */ 5500 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5501 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5502 if (!conn) return GAP_CONNECTION_INVALID; 5503 conn->sniff_min_interval = 0xffff; 5504 hci_run(); 5505 return 0; 5506 } 5507 #endif 5508 5509 void hci_halting_defer(void){ 5510 if (hci_stack->state != HCI_STATE_HALTING) return; 5511 switch (hci_stack->substate){ 5512 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5513 case HCI_HALTING_CLOSE: 5514 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5515 break; 5516 default: 5517 break; 5518 } 5519 } 5520 5521 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5522 void hci_setup_test_connections_fuzz(void){ 5523 hci_connection_t * conn; 5524 5525 // default address: 66:55:44:33:00:01 5526 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5527 5528 // setup Controller info 5529 hci_stack->num_cmd_packets = 255; 5530 hci_stack->acl_packets_total_num = 255; 5531 5532 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5533 addr[5] = 0x01; 5534 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5535 conn->con_handle = addr[5]; 5536 conn->role = HCI_ROLE_SLAVE; 5537 conn->state = RECEIVED_CONNECTION_REQUEST; 5538 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5539 5540 // setup incoming Classic SCO connection with con handle 0x0002 5541 addr[5] = 0x02; 5542 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5543 conn->con_handle = addr[5]; 5544 conn->role = HCI_ROLE_SLAVE; 5545 conn->state = RECEIVED_CONNECTION_REQUEST; 5546 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5547 5548 // setup ready Classic ACL connection with con handle 0x0003 5549 addr[5] = 0x03; 5550 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5551 conn->con_handle = addr[5]; 5552 conn->role = HCI_ROLE_SLAVE; 5553 conn->state = OPEN; 5554 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5555 5556 // setup ready Classic SCO connection with con handle 0x0004 5557 addr[5] = 0x04; 5558 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5559 conn->con_handle = addr[5]; 5560 conn->role = HCI_ROLE_SLAVE; 5561 conn->state = OPEN; 5562 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5563 5564 // setup ready LE ACL connection with con handle 0x005 and public address 5565 addr[5] = 0x05; 5566 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5567 conn->con_handle = addr[5]; 5568 conn->role = HCI_ROLE_SLAVE; 5569 conn->state = OPEN; 5570 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5571 } 5572 5573 void hci_free_connections_fuzz(void){ 5574 btstack_linked_list_iterator_t it; 5575 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5576 while (btstack_linked_list_iterator_has_next(&it)){ 5577 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5578 btstack_linked_list_iterator_remove(&it); 5579 btstack_memory_hci_connection_free(con); 5580 } 5581 } 5582 void hci_simulate_working_fuzz(void){ 5583 hci_init_done(); 5584 hci_stack->num_cmd_packets = 255; 5585 } 5586 #endif 5587