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_page_0(hci_connection_t * conn, const uint8_t * features){ 1910 // SSP Controller 1911 if (features[6] & (1 << 3)){ 1912 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1913 } 1914 // eSCO 1915 if (features[3] & (1<<7)){ 1916 conn->remote_supported_features[0] |= 1; 1917 } 1918 // Extended features 1919 if (features[7] & (1<<7)){ 1920 conn->remote_supported_features[0] |= 2; 1921 } 1922 } 1923 1924 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1925 // SSP Host 1926 if (features[0] & (1 << 0)){ 1927 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1928 } 1929 // SC Host 1930 if (features[0] & (1 << 3)){ 1931 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1932 } 1933 } 1934 1935 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1936 // SC Controller 1937 if (features[1] & (1 << 0)){ 1938 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1939 } 1940 } 1941 1942 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1943 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1944 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1945 if (conn->bonding_flags & BONDING_DEDICATED){ 1946 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1947 } 1948 } 1949 1950 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1951 // handle BT initialization 1952 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1953 hci_initializing_event_handler(packet, size); 1954 } 1955 1956 // help with BT sleep 1957 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1958 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1959 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1960 hci_initializing_next_state(); 1961 } 1962 } 1963 1964 #ifdef ENABLE_CLASSIC 1965 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 1966 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1967 conn->encryption_key_size = encryption_key_size; 1968 1969 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 1970 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 1971 return; 1972 } 1973 1974 // Request Authentication if not already done 1975 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 1976 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1977 } 1978 #endif 1979 1980 static void event_handler(uint8_t *packet, int size){ 1981 1982 uint16_t event_length = packet[1]; 1983 1984 // assert packet is complete 1985 if (size != (event_length + 2)){ 1986 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1987 return; 1988 } 1989 1990 bd_addr_t addr; 1991 bd_addr_type_t addr_type; 1992 hci_con_handle_t handle; 1993 hci_connection_t * conn; 1994 int i; 1995 int create_connection_cmd; 1996 1997 #ifdef ENABLE_CLASSIC 1998 uint8_t link_type; 1999 #endif 2000 2001 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2002 2003 switch (hci_event_packet_get_type(packet)) { 2004 2005 case HCI_EVENT_COMMAND_COMPLETE: 2006 // get num cmd packets - limit to 1 to reduce complexity 2007 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2008 2009 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 2010 if (packet[5]) break; 2011 // terminate, name 248 chars 2012 packet[6+248] = 0; 2013 log_info("local name: %s", &packet[6]); 2014 } 2015 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 2016 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2017 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2018 uint16_t acl_len = little_endian_read_16(packet, 6); 2019 uint16_t sco_len = packet[8]; 2020 2021 // determine usable ACL/SCO payload size 2022 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2023 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2024 2025 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2026 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2027 2028 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2029 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2030 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2031 } 2032 } 2033 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 2034 if (packet[5] == 0){ 2035 uint8_t event[5]; 2036 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2037 event[1] = 3; 2038 (void)memcpy(&event[2], &packet[6], 3); 2039 hci_emit_event(event, sizeof(event), 1); 2040 } 2041 } 2042 #ifdef ENABLE_BLE 2043 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 2044 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2045 hci_stack->le_acl_packets_total_num = packet[8]; 2046 // determine usable ACL payload size 2047 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2048 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2049 } 2050 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2051 } 2052 #endif 2053 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2054 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 2055 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2056 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2057 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); 2058 } 2059 #endif 2060 #ifdef ENABLE_LE_CENTRAL 2061 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 2062 hci_stack->le_whitelist_capacity = packet[6]; 2063 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2064 } 2065 #endif 2066 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 2067 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2068 hci_stack->local_bd_addr); 2069 log_info("Local Address, Status: 0x%02x: Addr: %s", 2070 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2071 #ifdef ENABLE_CLASSIC 2072 if (hci_stack->link_key_db){ 2073 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2074 } 2075 #endif 2076 } 2077 #ifdef ENABLE_CLASSIC 2078 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2079 hci_emit_discoverable_enabled(hci_stack->discoverable); 2080 } 2081 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 2082 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2083 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2084 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2085 hci_emit_event(event, sizeof(event), 1); 2086 } 2087 } 2088 #endif 2089 2090 // Note: HCI init checks 2091 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 2092 (void)memcpy(hci_stack->local_supported_features, 2093 &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2094 8); 2095 2096 #ifdef ENABLE_CLASSIC 2097 // determine usable ACL packet types based on host buffer size and supported features 2098 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2099 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2100 #endif 2101 // Classic/LE 2102 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2103 } 2104 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 2105 // hci_stack->hci_version = little_endian_read_16(packet, 4); 2106 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 2107 uint16_t manufacturer = little_endian_read_16(packet, 10); 2108 // map Cypress to Broadcom 2109 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2110 log_info("Treat Cypress as Broadcom"); 2111 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2112 little_endian_store_16(packet, 10, manufacturer); 2113 } 2114 hci_stack->manufacturer = manufacturer; 2115 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 2116 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 2117 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2118 } 2119 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2120 hci_stack->local_supported_commands[0] = 2121 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2122 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2123 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2124 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2125 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2126 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2127 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2128 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+20] & 0x10) << 3); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2129 hci_stack->local_supported_commands[1] = 2130 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+ 2] & 0x40) >> 6) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2131 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+32] & 0x08) >> 2); // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2132 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2133 } 2134 #ifdef ENABLE_CLASSIC 2135 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2136 if (packet[5] == 0){ 2137 hci_stack->synchronous_flow_control_enabled = 1; 2138 } 2139 } 2140 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2141 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2142 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2143 conn = hci_connection_for_handle(handle); 2144 if (!conn) break; 2145 uint8_t key_size = 0; 2146 if (status == 0){ 2147 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2148 log_info("Handle %x04x key Size: %u", handle, key_size); 2149 } else { 2150 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2151 } 2152 hci_handle_read_encryption_key_size_complete(conn, key_size); 2153 } 2154 #endif 2155 break; 2156 2157 case HCI_EVENT_COMMAND_STATUS: 2158 // get num cmd packets - limit to 1 to reduce complexity 2159 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2160 2161 // check command status to detected failed outgoing connections 2162 create_connection_cmd = 0; 2163 #ifdef ENABLE_CLASSIC 2164 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2165 create_connection_cmd = 1; 2166 } 2167 #endif 2168 #ifdef ENABLE_LE_CENTRAL 2169 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2170 create_connection_cmd = 1; 2171 } 2172 #endif 2173 if (create_connection_cmd) { 2174 uint8_t status = hci_event_command_status_get_status(packet); 2175 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2176 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); 2177 2178 // reset outgoing address info 2179 memset(hci_stack->outgoing_addr, 0, 6); 2180 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2181 2182 // error => outgoing connection failed 2183 if ((conn != NULL) && (status != 0)){ 2184 hci_handle_connection_failed(conn, status); 2185 } 2186 } 2187 break; 2188 2189 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2190 if (size < 3) return; 2191 uint16_t num_handles = packet[2]; 2192 if (size != (3 + num_handles * 4)) return; 2193 uint16_t offset = 3; 2194 for (i=0; i<num_handles;i++){ 2195 handle = little_endian_read_16(packet, offset) & 0x0fff; 2196 offset += 2; 2197 uint16_t num_packets = little_endian_read_16(packet, offset); 2198 offset += 2; 2199 2200 conn = hci_connection_for_handle(handle); 2201 if (!conn){ 2202 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2203 continue; 2204 } 2205 2206 if (conn->num_packets_sent >= num_packets){ 2207 conn->num_packets_sent -= num_packets; 2208 } else { 2209 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2210 conn->num_packets_sent = 0; 2211 } 2212 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2213 2214 #ifdef ENABLE_CLASSIC 2215 // For SCO, we do the can_send_now_check here 2216 hci_notify_if_sco_can_send_now(); 2217 #endif 2218 } 2219 break; 2220 } 2221 2222 #ifdef ENABLE_CLASSIC 2223 case HCI_EVENT_INQUIRY_COMPLETE: 2224 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2225 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2226 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2227 hci_emit_event(event, sizeof(event), 1); 2228 } 2229 break; 2230 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2231 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2232 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2233 } 2234 break; 2235 case HCI_EVENT_CONNECTION_REQUEST: 2236 reverse_bd_addr(&packet[2], addr); 2237 if (hci_stack->gap_classic_accept_callback != NULL){ 2238 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2239 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2240 bd_addr_copy(hci_stack->decline_addr, addr); 2241 break; 2242 } 2243 } 2244 2245 // TODO: eval COD 8-10 2246 link_type = packet[11]; 2247 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2248 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2249 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2250 if (!conn) { 2251 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2252 } 2253 if (!conn) { 2254 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2255 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2256 bd_addr_copy(hci_stack->decline_addr, addr); 2257 break; 2258 } 2259 conn->role = HCI_ROLE_SLAVE; 2260 conn->state = RECEIVED_CONNECTION_REQUEST; 2261 // store info about eSCO 2262 if (link_type == 0x02){ 2263 conn->remote_supported_features[0] |= 1; 2264 } 2265 hci_run(); 2266 break; 2267 2268 case HCI_EVENT_CONNECTION_COMPLETE: 2269 // Connection management 2270 reverse_bd_addr(&packet[5], addr); 2271 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2272 addr_type = BD_ADDR_TYPE_ACL; 2273 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2274 if (conn) { 2275 if (!packet[2]){ 2276 conn->state = OPEN; 2277 conn->con_handle = little_endian_read_16(packet, 3); 2278 2279 // queue get remote feature 2280 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2281 2282 // queue set supervision timeout if we're master 2283 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2284 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2285 } 2286 2287 // restart timer 2288 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2289 btstack_run_loop_add_timer(&conn->timeout); 2290 2291 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2292 2293 hci_emit_nr_connections_changed(); 2294 } else { 2295 // connection failed 2296 hci_handle_connection_failed(conn, packet[2]); 2297 } 2298 } 2299 break; 2300 2301 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2302 reverse_bd_addr(&packet[5], addr); 2303 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2304 if (packet[2]){ 2305 // connection failed 2306 break; 2307 } 2308 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2309 if (!conn) { 2310 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2311 } 2312 if (!conn) { 2313 break; 2314 } 2315 conn->state = OPEN; 2316 conn->con_handle = little_endian_read_16(packet, 3); 2317 2318 #ifdef ENABLE_SCO_OVER_HCI 2319 // update SCO 2320 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2321 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2322 } 2323 // trigger can send now 2324 if (hci_have_usb_transport()){ 2325 hci_stack->sco_can_send_now = 1; 2326 } 2327 #endif 2328 break; 2329 2330 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2331 handle = little_endian_read_16(packet, 3); 2332 conn = hci_connection_for_handle(handle); 2333 if (!conn) break; 2334 if (!packet[2]){ 2335 const uint8_t * features = &packet[5]; 2336 hci_handle_remote_features_page_0(conn, features); 2337 2338 // read extended features if possible 2339 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2340 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2341 break; 2342 } 2343 } 2344 hci_handle_remote_features_received(conn); 2345 break; 2346 2347 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2348 handle = little_endian_read_16(packet, 3); 2349 conn = hci_connection_for_handle(handle); 2350 if (!conn) break; 2351 // status = ok, page = 1 2352 if (!packet[2]) { 2353 uint8_t page_number = packet[5]; 2354 uint8_t maximum_page_number = packet[6]; 2355 const uint8_t * features = &packet[7]; 2356 bool done = false; 2357 switch (page_number){ 2358 case 1: 2359 hci_handle_remote_features_page_1(conn, features); 2360 if (maximum_page_number >= 2){ 2361 // get Secure Connections (Controller) from Page 2 if available 2362 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2363 } else { 2364 // otherwise, assume SC (Controller) == SC (Host) 2365 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2366 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2367 } 2368 done = true; 2369 } 2370 break; 2371 case 2: 2372 hci_handle_remote_features_page_2(conn, features); 2373 done = true; 2374 break; 2375 default: 2376 break; 2377 } 2378 if (!done) break; 2379 } 2380 hci_handle_remote_features_received(conn); 2381 break; 2382 2383 case HCI_EVENT_LINK_KEY_REQUEST: 2384 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2385 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2386 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2387 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2388 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2389 hci_run(); 2390 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2391 return; 2392 2393 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2394 reverse_bd_addr(&packet[2], addr); 2395 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2396 if (!conn) break; 2397 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2398 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2399 // Change Connection Encryption keeps link key type 2400 if (link_key_type != CHANGED_COMBINATION_KEY){ 2401 conn->link_key_type = link_key_type; 2402 } 2403 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2404 // still forward event to allow dismiss of pairing dialog 2405 break; 2406 } 2407 2408 case HCI_EVENT_PIN_CODE_REQUEST: 2409 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2410 // non-bondable mode: pin code negative reply will be sent 2411 if (!hci_stack->bondable){ 2412 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2413 hci_run(); 2414 return; 2415 } 2416 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2417 if (!hci_stack->link_key_db) break; 2418 hci_event_pin_code_request_get_bd_addr(packet, addr); 2419 hci_stack->link_key_db->delete_link_key(addr); 2420 break; 2421 2422 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2423 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2424 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2425 break; 2426 2427 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2428 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2429 if (!hci_stack->ssp_auto_accept) break; 2430 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2431 break; 2432 2433 case HCI_EVENT_USER_PASSKEY_REQUEST: 2434 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2435 if (!hci_stack->ssp_auto_accept) break; 2436 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2437 break; 2438 case HCI_EVENT_MODE_CHANGE: 2439 handle = hci_event_mode_change_get_handle(packet); 2440 conn = hci_connection_for_handle(handle); 2441 if (!conn) break; 2442 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2443 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2444 break; 2445 #endif 2446 2447 case HCI_EVENT_ENCRYPTION_CHANGE: 2448 handle = hci_event_encryption_change_get_connection_handle(packet); 2449 conn = hci_connection_for_handle(handle); 2450 if (!conn) break; 2451 if (hci_event_encryption_change_get_status(packet) == 0) { 2452 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2453 if (encryption_enabled){ 2454 if (hci_is_le_connection(conn)){ 2455 // For LE, we accept connection as encrypted 2456 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2457 } 2458 #ifdef ENABLE_CLASSIC 2459 else { 2460 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2461 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2462 bool connected_uses_aes_ccm = encryption_enabled == 2; 2463 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2464 log_info("SC during pairing, but only E0 now -> abort"); 2465 conn->state = conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2466 break; 2467 } 2468 2469 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2470 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2471 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2472 } else { 2473 // if not, pretend everything is perfect 2474 hci_handle_read_encryption_key_size_complete(conn, 16); 2475 } 2476 } 2477 #endif 2478 } else { 2479 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2480 } 2481 } 2482 2483 break; 2484 2485 #ifdef ENABLE_CLASSIC 2486 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2487 handle = hci_event_authentication_complete_get_connection_handle(packet); 2488 conn = hci_connection_for_handle(handle); 2489 if (!conn) break; 2490 2491 // dedicated bonding: send result and disconnect 2492 if (conn->bonding_flags & BONDING_DEDICATED){ 2493 conn->bonding_flags &= ~BONDING_DEDICATED; 2494 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2495 conn->bonding_status = packet[2]; 2496 break; 2497 } 2498 2499 // authenticated only if auth status == 0 2500 if (hci_event_authentication_complete_get_status(packet) == 0){ 2501 // authenticated 2502 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2503 2504 // If link key sufficient for requested security and not already encrypted, start encryption 2505 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2506 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2507 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2508 break; 2509 } 2510 } 2511 2512 // emit updated security level 2513 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2514 break; 2515 #endif 2516 2517 // HCI_EVENT_DISCONNECTION_COMPLETE 2518 // has been split, to first notify stack before shutting connection down 2519 // see end of function, too. 2520 case HCI_EVENT_DISCONNECTION_COMPLETE: 2521 if (packet[2]) break; // status != 0 2522 handle = little_endian_read_16(packet, 3); 2523 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2524 if (hci_stack->acl_fragmentation_total_size > 0) { 2525 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2526 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2527 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2528 hci_stack->acl_fragmentation_total_size = 0; 2529 hci_stack->acl_fragmentation_pos = 0; 2530 if (release_buffer){ 2531 hci_release_packet_buffer(); 2532 } 2533 } 2534 } 2535 2536 conn = hci_connection_for_handle(handle); 2537 if (!conn) break; 2538 // mark connection for shutdown 2539 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2540 2541 // emit dedicatd bonding event 2542 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2543 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2544 } 2545 2546 #ifdef ENABLE_BLE 2547 #ifdef ENABLE_LE_PERIPHERAL 2548 // re-enable advertisements for le connections if active 2549 if (hci_is_le_connection(conn)){ 2550 hci_reenable_advertisements_if_needed(); 2551 } 2552 #endif 2553 #endif 2554 break; 2555 2556 case HCI_EVENT_HARDWARE_ERROR: 2557 log_error("Hardware Error: 0x%02x", packet[2]); 2558 if (hci_stack->hardware_error_callback){ 2559 (*hci_stack->hardware_error_callback)(packet[2]); 2560 } else { 2561 // if no special requests, just reboot stack 2562 hci_power_control_off(); 2563 hci_power_control_on(); 2564 } 2565 break; 2566 2567 #ifdef ENABLE_CLASSIC 2568 case HCI_EVENT_ROLE_CHANGE: 2569 if (packet[2]) break; // status != 0 2570 reverse_bd_addr(&packet[3], addr); 2571 addr_type = BD_ADDR_TYPE_ACL; 2572 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2573 if (!conn) break; 2574 conn->role = packet[9]; 2575 break; 2576 #endif 2577 2578 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2579 // release packet buffer only for asynchronous transport and if there are not further fragements 2580 if (hci_transport_synchronous()) { 2581 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2582 return; // instead of break: to avoid re-entering hci_run() 2583 } 2584 hci_stack->acl_fragmentation_tx_active = 0; 2585 if (hci_stack->acl_fragmentation_total_size) break; 2586 hci_release_packet_buffer(); 2587 2588 // L2CAP receives this event via the hci_emit_event below 2589 2590 #ifdef ENABLE_CLASSIC 2591 // For SCO, we do the can_send_now_check here 2592 hci_notify_if_sco_can_send_now(); 2593 #endif 2594 break; 2595 2596 #ifdef ENABLE_CLASSIC 2597 case HCI_EVENT_SCO_CAN_SEND_NOW: 2598 // For SCO, we do the can_send_now_check here 2599 hci_stack->sco_can_send_now = 1; 2600 hci_notify_if_sco_can_send_now(); 2601 return; 2602 2603 // explode inquriy results for easier consumption 2604 case HCI_EVENT_INQUIRY_RESULT: 2605 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2606 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2607 gap_inquiry_explode(packet, size); 2608 break; 2609 #endif 2610 2611 #ifdef ENABLE_BLE 2612 case HCI_EVENT_LE_META: 2613 switch (packet[2]){ 2614 #ifdef ENABLE_LE_CENTRAL 2615 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2616 // log_info("advertising report received"); 2617 if (!hci_stack->le_scanning_enabled) break; 2618 le_handle_advertisement_report(packet, size); 2619 break; 2620 #endif 2621 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2622 // Connection management 2623 reverse_bd_addr(&packet[8], addr); 2624 addr_type = (bd_addr_type_t)packet[7]; 2625 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2626 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2627 2628 #ifdef ENABLE_LE_CENTRAL 2629 // if auto-connect, remove from whitelist in both roles 2630 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2631 hci_remove_from_whitelist(addr_type, addr); 2632 } 2633 // handle error: error is reported only to the initiator -> outgoing connection 2634 if (packet[3]){ 2635 2636 // handle cancelled outgoing connection 2637 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2638 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2639 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2640 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2641 conn = gap_get_outgoing_connection(); 2642 } 2643 2644 // outgoing connection establishment is done 2645 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2646 // remove entry 2647 if (conn){ 2648 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2649 btstack_memory_hci_connection_free( conn ); 2650 } 2651 break; 2652 } 2653 #endif 2654 // on success, both hosts receive connection complete event 2655 if (packet[6] == HCI_ROLE_MASTER){ 2656 #ifdef ENABLE_LE_CENTRAL 2657 // if we're master, it was an outgoing connection and we're done with it 2658 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2659 #endif 2660 } else { 2661 #ifdef ENABLE_LE_PERIPHERAL 2662 // if we're slave, it was an incoming connection, advertisements have stopped 2663 hci_stack->le_advertisements_active = 0; 2664 #endif 2665 } 2666 // LE connections are auto-accepted, so just create a connection if there isn't one already 2667 if (!conn){ 2668 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2669 } 2670 // no memory, sorry. 2671 if (!conn){ 2672 break; 2673 } 2674 2675 conn->state = OPEN; 2676 conn->role = packet[6]; 2677 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2678 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2679 2680 #ifdef ENABLE_LE_PERIPHERAL 2681 if (packet[6] == HCI_ROLE_SLAVE){ 2682 hci_reenable_advertisements_if_needed(); 2683 } 2684 #endif 2685 2686 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2687 2688 // restart timer 2689 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2690 // btstack_run_loop_add_timer(&conn->timeout); 2691 2692 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2693 2694 hci_emit_nr_connections_changed(); 2695 break; 2696 2697 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2698 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2699 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2700 conn = hci_connection_for_handle(handle); 2701 if (!conn) break; 2702 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2703 break; 2704 2705 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2706 // connection 2707 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2708 conn = hci_connection_for_handle(handle); 2709 if (conn) { 2710 // read arguments 2711 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2712 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2713 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2714 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2715 2716 // validate against current connection parameter range 2717 le_connection_parameter_range_t existing_range; 2718 gap_get_connection_parameter_range(&existing_range); 2719 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2720 if (update_parameter){ 2721 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2722 conn->le_conn_interval_min = le_conn_interval_min; 2723 conn->le_conn_interval_max = le_conn_interval_max; 2724 conn->le_conn_latency = le_conn_latency; 2725 conn->le_supervision_timeout = le_supervision_timeout; 2726 } else { 2727 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2728 } 2729 } 2730 break; 2731 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2732 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2733 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2734 conn = hci_connection_for_handle(handle); 2735 if (conn) { 2736 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2737 } 2738 break; 2739 #endif 2740 default: 2741 break; 2742 } 2743 break; 2744 #endif 2745 case HCI_EVENT_VENDOR_SPECIFIC: 2746 // Vendor specific commands often create vendor specific event instead of num completed packets 2747 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2748 switch (hci_stack->manufacturer){ 2749 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2750 hci_stack->num_cmd_packets = 1; 2751 break; 2752 default: 2753 break; 2754 } 2755 break; 2756 default: 2757 break; 2758 } 2759 2760 handle_event_for_current_stack_state(packet, size); 2761 2762 // notify upper stack 2763 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2764 2765 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2766 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2767 if (!packet[2]){ 2768 handle = little_endian_read_16(packet, 3); 2769 hci_connection_t * aConn = hci_connection_for_handle(handle); 2770 if (aConn) { 2771 // discard connection if app did not trigger a reconnect in the event handler 2772 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2773 hci_shutdown_connection(aConn); 2774 } 2775 } 2776 } 2777 } 2778 2779 // execute main loop 2780 hci_run(); 2781 } 2782 2783 #ifdef ENABLE_CLASSIC 2784 2785 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2786 static void sco_schedule_tx(hci_connection_t * conn); 2787 2788 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2789 log_debug("SCO TX Timeout"); 2790 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2791 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2792 if (!conn) return; 2793 2794 // trigger send 2795 conn->sco_tx_ready = 1; 2796 // extra packet if CVSD but SCO buffer is too short 2797 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2798 conn->sco_tx_ready++; 2799 } 2800 hci_notify_if_sco_can_send_now(); 2801 } 2802 2803 2804 #define SCO_TX_AFTER_RX_MS (6) 2805 2806 static void sco_schedule_tx(hci_connection_t * conn){ 2807 2808 uint32_t now = btstack_run_loop_get_time_ms(); 2809 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2810 int time_delta_ms = sco_tx_ms - now; 2811 2812 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2813 2814 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2815 btstack_run_loop_set_timer(timer, time_delta_ms); 2816 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2817 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2818 btstack_run_loop_add_timer(timer); 2819 } 2820 2821 static void sco_handler(uint8_t * packet, uint16_t size){ 2822 // lookup connection struct 2823 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2824 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2825 if (!conn) return; 2826 2827 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2828 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2829 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2830 packet[2] = 0x3c; 2831 memmove(&packet[3], &packet[23], 63); 2832 size = 63; 2833 } 2834 } 2835 2836 if (hci_have_usb_transport()){ 2837 // Nothing to do 2838 } else { 2839 // 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); 2840 if (hci_stack->synchronous_flow_control_enabled == 0){ 2841 uint32_t now = btstack_run_loop_get_time_ms(); 2842 2843 if (!conn->sco_rx_valid){ 2844 // ignore first 10 packets 2845 conn->sco_rx_count++; 2846 // log_debug("sco rx count %u", conn->sco_rx_count); 2847 if (conn->sco_rx_count == 10) { 2848 // use first timestamp as is and pretent it just started 2849 conn->sco_rx_ms = now; 2850 conn->sco_rx_valid = 1; 2851 conn->sco_rx_count = 0; 2852 sco_schedule_tx(conn); 2853 } 2854 } else { 2855 // track expected arrival timme 2856 conn->sco_rx_count++; 2857 conn->sco_rx_ms += 7; 2858 int delta = (int32_t) (now - conn->sco_rx_ms); 2859 if (delta > 0){ 2860 conn->sco_rx_ms++; 2861 } 2862 // log_debug("sco rx %u", conn->sco_rx_ms); 2863 sco_schedule_tx(conn); 2864 } 2865 } 2866 } 2867 // deliver to app 2868 if (hci_stack->sco_packet_handler) { 2869 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2870 } 2871 2872 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2873 conn->num_packets_completed++; 2874 hci_stack->host_completed_packets = 1; 2875 hci_run(); 2876 #endif 2877 } 2878 #endif 2879 2880 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2881 hci_dump_packet(packet_type, 1, packet, size); 2882 switch (packet_type) { 2883 case HCI_EVENT_PACKET: 2884 event_handler(packet, size); 2885 break; 2886 case HCI_ACL_DATA_PACKET: 2887 acl_handler(packet, size); 2888 break; 2889 #ifdef ENABLE_CLASSIC 2890 case HCI_SCO_DATA_PACKET: 2891 sco_handler(packet, size); 2892 break; 2893 #endif 2894 default: 2895 break; 2896 } 2897 } 2898 2899 /** 2900 * @brief Add event packet handler. 2901 */ 2902 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2903 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2904 } 2905 2906 2907 /** Register HCI packet handlers */ 2908 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2909 hci_stack->acl_packet_handler = handler; 2910 } 2911 2912 #ifdef ENABLE_CLASSIC 2913 /** 2914 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2915 */ 2916 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2917 hci_stack->sco_packet_handler = handler; 2918 } 2919 #endif 2920 2921 static void hci_state_reset(void){ 2922 // no connections yet 2923 hci_stack->connections = NULL; 2924 2925 // keep discoverable/connectable as this has been requested by the client(s) 2926 // hci_stack->discoverable = 0; 2927 // hci_stack->connectable = 0; 2928 // hci_stack->bondable = 1; 2929 // hci_stack->own_addr_type = 0; 2930 2931 // buffer is free 2932 hci_stack->hci_packet_buffer_reserved = 0; 2933 2934 // no pending cmds 2935 hci_stack->decline_reason = 0; 2936 hci_stack->new_scan_enable_value = 0xff; 2937 2938 // LE 2939 #ifdef ENABLE_BLE 2940 memset(hci_stack->le_random_address, 0, 6); 2941 hci_stack->le_random_address_set = 0; 2942 #endif 2943 #ifdef ENABLE_LE_CENTRAL 2944 hci_stack->le_scanning_active = 0; 2945 hci_stack->le_scan_type = 0xff; 2946 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2947 hci_stack->le_whitelist = 0; 2948 hci_stack->le_whitelist_capacity = 0; 2949 #endif 2950 } 2951 2952 #ifdef ENABLE_CLASSIC 2953 /** 2954 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2955 */ 2956 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2957 // store and open remote device db 2958 hci_stack->link_key_db = link_key_db; 2959 if (hci_stack->link_key_db) { 2960 hci_stack->link_key_db->open(); 2961 } 2962 } 2963 #endif 2964 2965 void hci_init(const hci_transport_t *transport, const void *config){ 2966 2967 #ifdef HAVE_MALLOC 2968 if (!hci_stack) { 2969 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2970 } 2971 #else 2972 hci_stack = &hci_stack_static; 2973 #endif 2974 memset(hci_stack, 0, sizeof(hci_stack_t)); 2975 2976 // reference to use transport layer implementation 2977 hci_stack->hci_transport = transport; 2978 2979 // reference to used config 2980 hci_stack->config = config; 2981 2982 // setup pointer for outgoing packet buffer 2983 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2984 2985 // max acl payload size defined in config.h 2986 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2987 2988 // register packet handlers with transport 2989 transport->register_packet_handler(&packet_handler); 2990 2991 hci_stack->state = HCI_STATE_OFF; 2992 2993 // class of device 2994 hci_stack->class_of_device = 0x007a020c; // Smartphone 2995 2996 // bondable by default 2997 hci_stack->bondable = 1; 2998 2999 #ifdef ENABLE_CLASSIC 3000 // classic name 3001 hci_stack->local_name = default_classic_name; 3002 3003 // Master slave policy 3004 hci_stack->master_slave_policy = 1; 3005 3006 // Allow Role Switch 3007 hci_stack->allow_role_switch = 1; 3008 3009 // Default / minimum security level = 2 3010 hci_stack->gap_security_level = LEVEL_2; 3011 3012 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 3013 hci_stack->gap_required_encyrption_key_size = 16; 3014 #endif 3015 3016 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3017 hci_stack->ssp_enable = 1; 3018 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3019 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3020 hci_stack->ssp_auto_accept = 1; 3021 3022 // Secure Connections: enable (requires support from Controller) 3023 hci_stack->secure_connections_enable = true; 3024 3025 // voice setting - signed 16 bit pcm data with CVSD over the air 3026 hci_stack->sco_voice_setting = 0x60; 3027 3028 #ifdef ENABLE_LE_CENTRAL 3029 // connection parameter to use for outgoing connections 3030 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3031 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3032 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3033 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3034 hci_stack->le_connection_latency = 4; // 4 3035 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3036 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3037 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3038 3039 // default LE Scanning 3040 hci_stack->le_scan_interval = 0x1e0; 3041 hci_stack->le_scan_window = 0x30; 3042 #endif 3043 3044 #ifdef ENABLE_LE_PERIPHERAL 3045 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3046 #endif 3047 3048 // connection parameter range used to answer connection parameter update requests in l2cap 3049 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3050 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3051 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3052 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3053 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3054 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3055 3056 hci_state_reset(); 3057 } 3058 3059 /** 3060 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3061 */ 3062 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3063 hci_stack->chipset = chipset_driver; 3064 3065 // reset chipset driver - init is also called on power_up 3066 if (hci_stack->chipset && hci_stack->chipset->init){ 3067 hci_stack->chipset->init(hci_stack->config); 3068 } 3069 } 3070 3071 /** 3072 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3073 */ 3074 void hci_set_control(const btstack_control_t *hardware_control){ 3075 // references to used control implementation 3076 hci_stack->control = hardware_control; 3077 // init with transport config 3078 hardware_control->init(hci_stack->config); 3079 } 3080 3081 void hci_close(void){ 3082 // close remote device db 3083 if (hci_stack->link_key_db) { 3084 hci_stack->link_key_db->close(); 3085 } 3086 3087 btstack_linked_list_iterator_t lit; 3088 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3089 while (btstack_linked_list_iterator_has_next(&lit)){ 3090 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3091 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3092 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3093 hci_shutdown_connection(connection); 3094 } 3095 3096 hci_power_control(HCI_POWER_OFF); 3097 3098 #ifdef HAVE_MALLOC 3099 free(hci_stack); 3100 #endif 3101 hci_stack = NULL; 3102 } 3103 3104 #ifdef ENABLE_CLASSIC 3105 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3106 // validate ranage and set 3107 if (encryption_key_size < 7) return; 3108 if (encryption_key_size > 16) return; 3109 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3110 } 3111 3112 void gap_set_security_level(gap_security_level_t security_level){ 3113 hci_stack->gap_security_level = security_level; 3114 } 3115 3116 gap_security_level_t gap_get_security_level(void){ 3117 return hci_stack->gap_security_level; 3118 } 3119 #endif 3120 3121 #ifdef ENABLE_CLASSIC 3122 void gap_set_class_of_device(uint32_t class_of_device){ 3123 hci_stack->class_of_device = class_of_device; 3124 } 3125 3126 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3127 hci_stack->default_link_policy_settings = default_link_policy_settings; 3128 } 3129 3130 void gap_set_allow_role_switch(bool allow_role_switch){ 3131 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3132 } 3133 3134 uint8_t hci_get_allow_role_switch(void){ 3135 return hci_stack->allow_role_switch; 3136 } 3137 3138 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3139 hci_stack->link_supervision_timeout = link_supervision_timeout; 3140 } 3141 3142 void hci_disable_l2cap_timeout_check(void){ 3143 disable_l2cap_timeouts = 1; 3144 } 3145 #endif 3146 3147 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3148 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3149 void hci_set_bd_addr(bd_addr_t addr){ 3150 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3151 hci_stack->custom_bd_addr_set = 1; 3152 } 3153 #endif 3154 3155 // State-Module-Driver overview 3156 // state module low-level 3157 // HCI_STATE_OFF off close 3158 // HCI_STATE_INITIALIZING, on open 3159 // HCI_STATE_WORKING, on open 3160 // HCI_STATE_HALTING, on open 3161 // HCI_STATE_SLEEPING, off/sleep close 3162 // HCI_STATE_FALLING_ASLEEP on open 3163 3164 static int hci_power_control_on(void){ 3165 3166 // power on 3167 int err = 0; 3168 if (hci_stack->control && hci_stack->control->on){ 3169 err = (*hci_stack->control->on)(); 3170 } 3171 if (err){ 3172 log_error( "POWER_ON failed"); 3173 hci_emit_hci_open_failed(); 3174 return err; 3175 } 3176 3177 // int chipset driver 3178 if (hci_stack->chipset && hci_stack->chipset->init){ 3179 hci_stack->chipset->init(hci_stack->config); 3180 } 3181 3182 // init transport 3183 if (hci_stack->hci_transport->init){ 3184 hci_stack->hci_transport->init(hci_stack->config); 3185 } 3186 3187 // open transport 3188 err = hci_stack->hci_transport->open(); 3189 if (err){ 3190 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3191 if (hci_stack->control && hci_stack->control->off){ 3192 (*hci_stack->control->off)(); 3193 } 3194 hci_emit_hci_open_failed(); 3195 return err; 3196 } 3197 return 0; 3198 } 3199 3200 static void hci_power_control_off(void){ 3201 3202 log_info("hci_power_control_off"); 3203 3204 // close low-level device 3205 hci_stack->hci_transport->close(); 3206 3207 log_info("hci_power_control_off - hci_transport closed"); 3208 3209 // power off 3210 if (hci_stack->control && hci_stack->control->off){ 3211 (*hci_stack->control->off)(); 3212 } 3213 3214 log_info("hci_power_control_off - control closed"); 3215 3216 hci_stack->state = HCI_STATE_OFF; 3217 } 3218 3219 static void hci_power_control_sleep(void){ 3220 3221 log_info("hci_power_control_sleep"); 3222 3223 #if 0 3224 // don't close serial port during sleep 3225 3226 // close low-level device 3227 hci_stack->hci_transport->close(hci_stack->config); 3228 #endif 3229 3230 // sleep mode 3231 if (hci_stack->control && hci_stack->control->sleep){ 3232 (*hci_stack->control->sleep)(); 3233 } 3234 3235 hci_stack->state = HCI_STATE_SLEEPING; 3236 } 3237 3238 static int hci_power_control_wake(void){ 3239 3240 log_info("hci_power_control_wake"); 3241 3242 // wake on 3243 if (hci_stack->control && hci_stack->control->wake){ 3244 (*hci_stack->control->wake)(); 3245 } 3246 3247 #if 0 3248 // open low-level device 3249 int err = hci_stack->hci_transport->open(hci_stack->config); 3250 if (err){ 3251 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3252 if (hci_stack->control && hci_stack->control->off){ 3253 (*hci_stack->control->off)(); 3254 } 3255 hci_emit_hci_open_failed(); 3256 return err; 3257 } 3258 #endif 3259 3260 return 0; 3261 } 3262 3263 static void hci_power_transition_to_initializing(void){ 3264 // set up state machine 3265 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3266 hci_stack->hci_packet_buffer_reserved = 0; 3267 hci_stack->state = HCI_STATE_INITIALIZING; 3268 hci_stack->substate = HCI_INIT_SEND_RESET; 3269 } 3270 3271 int hci_power_control(HCI_POWER_MODE power_mode){ 3272 3273 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3274 3275 int err = 0; 3276 switch (hci_stack->state){ 3277 3278 case HCI_STATE_OFF: 3279 switch (power_mode){ 3280 case HCI_POWER_ON: 3281 err = hci_power_control_on(); 3282 if (err) { 3283 log_error("hci_power_control_on() error %d", err); 3284 return err; 3285 } 3286 hci_power_transition_to_initializing(); 3287 break; 3288 case HCI_POWER_OFF: 3289 // do nothing 3290 break; 3291 case HCI_POWER_SLEEP: 3292 // do nothing (with SLEEP == OFF) 3293 break; 3294 } 3295 break; 3296 3297 case HCI_STATE_INITIALIZING: 3298 switch (power_mode){ 3299 case HCI_POWER_ON: 3300 // do nothing 3301 break; 3302 case HCI_POWER_OFF: 3303 // no connections yet, just turn it off 3304 hci_power_control_off(); 3305 break; 3306 case HCI_POWER_SLEEP: 3307 // no connections yet, just turn it off 3308 hci_power_control_sleep(); 3309 break; 3310 } 3311 break; 3312 3313 case HCI_STATE_WORKING: 3314 switch (power_mode){ 3315 case HCI_POWER_ON: 3316 // do nothing 3317 break; 3318 case HCI_POWER_OFF: 3319 // see hci_run 3320 hci_stack->state = HCI_STATE_HALTING; 3321 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3322 break; 3323 case HCI_POWER_SLEEP: 3324 // see hci_run 3325 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3326 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3327 break; 3328 } 3329 break; 3330 3331 case HCI_STATE_HALTING: 3332 switch (power_mode){ 3333 case HCI_POWER_ON: 3334 hci_power_transition_to_initializing(); 3335 break; 3336 case HCI_POWER_OFF: 3337 // do nothing 3338 break; 3339 case HCI_POWER_SLEEP: 3340 // see hci_run 3341 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3342 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3343 break; 3344 } 3345 break; 3346 3347 case HCI_STATE_FALLING_ASLEEP: 3348 switch (power_mode){ 3349 case HCI_POWER_ON: 3350 3351 #ifdef HAVE_PLATFORM_IPHONE_OS 3352 // nothing to do, if H4 supports power management 3353 if (btstack_control_iphone_power_management_enabled()){ 3354 hci_stack->state = HCI_STATE_INITIALIZING; 3355 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3356 break; 3357 } 3358 #endif 3359 hci_power_transition_to_initializing(); 3360 break; 3361 case HCI_POWER_OFF: 3362 // see hci_run 3363 hci_stack->state = HCI_STATE_HALTING; 3364 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3365 break; 3366 case HCI_POWER_SLEEP: 3367 // do nothing 3368 break; 3369 } 3370 break; 3371 3372 case HCI_STATE_SLEEPING: 3373 switch (power_mode){ 3374 case HCI_POWER_ON: 3375 3376 #ifdef HAVE_PLATFORM_IPHONE_OS 3377 // nothing to do, if H4 supports power management 3378 if (btstack_control_iphone_power_management_enabled()){ 3379 hci_stack->state = HCI_STATE_INITIALIZING; 3380 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3381 hci_update_scan_enable(); 3382 break; 3383 } 3384 #endif 3385 err = hci_power_control_wake(); 3386 if (err) return err; 3387 hci_power_transition_to_initializing(); 3388 break; 3389 case HCI_POWER_OFF: 3390 hci_stack->state = HCI_STATE_HALTING; 3391 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3392 break; 3393 case HCI_POWER_SLEEP: 3394 // do nothing 3395 break; 3396 } 3397 break; 3398 } 3399 3400 // create internal event 3401 hci_emit_state(); 3402 3403 // trigger next/first action 3404 hci_run(); 3405 3406 return 0; 3407 } 3408 3409 3410 #ifdef ENABLE_CLASSIC 3411 3412 static void hci_update_scan_enable(void){ 3413 // 2 = page scan, 1 = inq scan 3414 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3415 hci_run(); 3416 } 3417 3418 void gap_discoverable_control(uint8_t enable){ 3419 if (enable) enable = 1; // normalize argument 3420 3421 if (hci_stack->discoverable == enable){ 3422 hci_emit_discoverable_enabled(hci_stack->discoverable); 3423 return; 3424 } 3425 3426 hci_stack->discoverable = enable; 3427 hci_update_scan_enable(); 3428 } 3429 3430 void gap_connectable_control(uint8_t enable){ 3431 if (enable) enable = 1; // normalize argument 3432 3433 // don't emit event 3434 if (hci_stack->connectable == enable) return; 3435 3436 hci_stack->connectable = enable; 3437 hci_update_scan_enable(); 3438 } 3439 #endif 3440 3441 void gap_local_bd_addr(bd_addr_t address_buffer){ 3442 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3443 } 3444 3445 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3446 static void hci_host_num_completed_packets(void){ 3447 3448 // create packet manually as arrays are not supported and num_commands should not get reduced 3449 hci_reserve_packet_buffer(); 3450 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3451 3452 uint16_t size = 0; 3453 uint16_t num_handles = 0; 3454 packet[size++] = 0x35; 3455 packet[size++] = 0x0c; 3456 size++; // skip param len 3457 size++; // skip num handles 3458 3459 // add { handle, packets } entries 3460 btstack_linked_item_t * it; 3461 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3462 hci_connection_t * connection = (hci_connection_t *) it; 3463 if (connection->num_packets_completed){ 3464 little_endian_store_16(packet, size, connection->con_handle); 3465 size += 2; 3466 little_endian_store_16(packet, size, connection->num_packets_completed); 3467 size += 2; 3468 // 3469 num_handles++; 3470 connection->num_packets_completed = 0; 3471 } 3472 } 3473 3474 packet[2] = size - 3; 3475 packet[3] = num_handles; 3476 3477 hci_stack->host_completed_packets = 0; 3478 3479 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3480 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3481 3482 // release packet buffer for synchronous transport implementations 3483 if (hci_transport_synchronous()){ 3484 hci_release_packet_buffer(); 3485 hci_emit_transport_packet_sent(); 3486 } 3487 } 3488 #endif 3489 3490 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3491 UNUSED(ds); 3492 hci_stack->substate = HCI_HALTING_CLOSE; 3493 // allow packet handlers to defer final shutdown 3494 hci_emit_state(); 3495 hci_run(); 3496 } 3497 3498 static bool hci_run_acl_fragments(void){ 3499 if (hci_stack->acl_fragmentation_total_size > 0) { 3500 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3501 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3502 if (connection) { 3503 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3504 hci_send_acl_packet_fragments(connection); 3505 return true; 3506 } 3507 } else { 3508 // connection gone -> discard further fragments 3509 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3510 hci_stack->acl_fragmentation_total_size = 0; 3511 hci_stack->acl_fragmentation_pos = 0; 3512 } 3513 } 3514 return false; 3515 } 3516 3517 #ifdef ENABLE_CLASSIC 3518 static bool hci_run_general_gap_classic(void){ 3519 3520 // decline incoming connections 3521 if (hci_stack->decline_reason){ 3522 uint8_t reason = hci_stack->decline_reason; 3523 hci_stack->decline_reason = 0; 3524 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3525 return true; 3526 } 3527 // send scan enable 3528 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3529 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3530 hci_stack->new_scan_enable_value = 0xff; 3531 return true; 3532 } 3533 // start/stop inquiry 3534 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3535 uint8_t duration = hci_stack->inquiry_state; 3536 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3537 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3538 return true; 3539 } 3540 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3541 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3542 hci_send_cmd(&hci_inquiry_cancel); 3543 return true; 3544 } 3545 // remote name request 3546 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3547 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3548 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3549 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3550 return true; 3551 } 3552 // pairing 3553 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3554 uint8_t state = hci_stack->gap_pairing_state; 3555 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3556 switch (state){ 3557 case GAP_PAIRING_STATE_SEND_PIN: 3558 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); 3559 break; 3560 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3561 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3562 break; 3563 case GAP_PAIRING_STATE_SEND_PASSKEY: 3564 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3565 break; 3566 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3567 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3568 break; 3569 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3570 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3571 break; 3572 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3573 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3574 break; 3575 default: 3576 break; 3577 } 3578 return true; 3579 } 3580 return false; 3581 } 3582 #endif 3583 3584 #ifdef ENABLE_BLE 3585 static bool hci_run_general_gap_le(void){ 3586 3587 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3588 3589 if (hci_stack->state != HCI_STATE_WORKING) return false; 3590 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0) ) return false; 3591 3592 #ifdef ENABLE_LE_CENTRAL 3593 // parameter change requires scanning to be stopped first 3594 if (hci_stack->le_scan_type != 0xff) { 3595 if (hci_stack->le_scanning_active){ 3596 hci_stack->le_scanning_active = 0; 3597 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3598 } else { 3599 int scan_type = (int) hci_stack->le_scan_type; 3600 hci_stack->le_scan_type = 0xff; 3601 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); 3602 } 3603 return true; 3604 } 3605 // finally, we can enable/disable le scan 3606 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3607 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3608 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3609 return true; 3610 } 3611 #endif 3612 #ifdef ENABLE_LE_PERIPHERAL 3613 // le advertisement control 3614 if (hci_stack->le_advertisements_todo){ 3615 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3616 } 3617 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3618 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3619 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3620 return true; 3621 } 3622 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3623 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3624 hci_send_cmd(&hci_le_set_advertising_parameters, 3625 hci_stack->le_advertisements_interval_min, 3626 hci_stack->le_advertisements_interval_max, 3627 hci_stack->le_advertisements_type, 3628 hci_stack->le_own_addr_type, 3629 hci_stack->le_advertisements_direct_address_type, 3630 hci_stack->le_advertisements_direct_address, 3631 hci_stack->le_advertisements_channel_map, 3632 hci_stack->le_advertisements_filter_policy); 3633 return true; 3634 } 3635 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3636 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3637 uint8_t adv_data_clean[31]; 3638 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3639 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3640 hci_stack->le_advertisements_data_len); 3641 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3642 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3643 return true; 3644 } 3645 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3646 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3647 uint8_t scan_data_clean[31]; 3648 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3649 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3650 hci_stack->le_scan_response_data_len); 3651 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3652 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3653 return true; 3654 } 3655 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3656 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3657 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3658 return true; 3659 } 3660 #endif 3661 3662 #ifdef ENABLE_LE_CENTRAL 3663 // 3664 // LE Whitelist Management 3665 // 3666 3667 // check if whitelist needs modification 3668 btstack_linked_list_iterator_t lit; 3669 int modification_pending = 0; 3670 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3671 while (btstack_linked_list_iterator_has_next(&lit)){ 3672 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3673 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3674 modification_pending = 1; 3675 break; 3676 } 3677 } 3678 3679 if (modification_pending){ 3680 // stop connnecting if modification pending 3681 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3682 hci_send_cmd(&hci_le_create_connection_cancel); 3683 return true; 3684 } 3685 3686 // add/remove entries 3687 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3688 while (btstack_linked_list_iterator_has_next(&lit)){ 3689 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3690 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3691 entry->state = LE_WHITELIST_ON_CONTROLLER; 3692 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3693 return true; 3694 } 3695 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3696 bd_addr_t address; 3697 bd_addr_type_t address_type = entry->address_type; 3698 (void)memcpy(address, entry->address, 6); 3699 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3700 btstack_memory_whitelist_entry_free(entry); 3701 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3702 return true; 3703 } 3704 } 3705 } 3706 3707 // start connecting 3708 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3709 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3710 bd_addr_t null_addr; 3711 memset(null_addr, 0, 6); 3712 hci_send_cmd(&hci_le_create_connection, 3713 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3714 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3715 1, // use whitelist 3716 0, // peer address type 3717 null_addr, // peer bd addr 3718 hci_stack->le_own_addr_type, // our addr type: 3719 hci_stack->le_connection_interval_min, // conn interval min 3720 hci_stack->le_connection_interval_max, // conn interval max 3721 hci_stack->le_connection_latency, // conn latency 3722 hci_stack->le_supervision_timeout, // conn latency 3723 hci_stack->le_minimum_ce_length, // min ce length 3724 hci_stack->le_maximum_ce_length // max ce length 3725 ); 3726 return true; 3727 } 3728 #endif 3729 return false; 3730 } 3731 #endif 3732 3733 static bool hci_run_general_pending_commmands(void){ 3734 btstack_linked_item_t * it; 3735 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3736 hci_connection_t * connection = (hci_connection_t *) it; 3737 3738 switch(connection->state){ 3739 case SEND_CREATE_CONNECTION: 3740 switch(connection->address_type){ 3741 #ifdef ENABLE_CLASSIC 3742 case BD_ADDR_TYPE_ACL: 3743 log_info("sending hci_create_connection"); 3744 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3745 break; 3746 #endif 3747 default: 3748 #ifdef ENABLE_BLE 3749 #ifdef ENABLE_LE_CENTRAL 3750 // track outgoing connection 3751 hci_stack->outgoing_addr_type = connection->address_type; 3752 (void)memcpy(hci_stack->outgoing_addr, 3753 connection->address, 6); 3754 log_info("sending hci_le_create_connection"); 3755 hci_send_cmd(&hci_le_create_connection, 3756 hci_stack->le_connection_scan_interval, // conn scan interval 3757 hci_stack->le_connection_scan_window, // conn scan windows 3758 0, // don't use whitelist 3759 connection->address_type, // peer address type 3760 connection->address, // peer bd addr 3761 hci_stack->le_own_addr_type, // our addr type: 3762 hci_stack->le_connection_interval_min, // conn interval min 3763 hci_stack->le_connection_interval_max, // conn interval max 3764 hci_stack->le_connection_latency, // conn latency 3765 hci_stack->le_supervision_timeout, // conn latency 3766 hci_stack->le_minimum_ce_length, // min ce length 3767 hci_stack->le_maximum_ce_length // max ce length 3768 ); 3769 connection->state = SENT_CREATE_CONNECTION; 3770 #endif 3771 #endif 3772 break; 3773 } 3774 return true; 3775 3776 #ifdef ENABLE_CLASSIC 3777 case RECEIVED_CONNECTION_REQUEST: 3778 connection->role = HCI_ROLE_SLAVE; 3779 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3780 log_info("sending hci_accept_connection_request"); 3781 connection->state = ACCEPTED_CONNECTION_REQUEST; 3782 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3783 } 3784 return true; 3785 #endif 3786 3787 #ifdef ENABLE_BLE 3788 #ifdef ENABLE_LE_CENTRAL 3789 case SEND_CANCEL_CONNECTION: 3790 connection->state = SENT_CANCEL_CONNECTION; 3791 hci_send_cmd(&hci_le_create_connection_cancel); 3792 return true; 3793 #endif 3794 #endif 3795 case SEND_DISCONNECT: 3796 connection->state = SENT_DISCONNECT; 3797 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3798 return true; 3799 3800 default: 3801 break; 3802 } 3803 3804 // no further commands if connection is about to get shut down 3805 if (connection->state == SENT_DISCONNECT) continue; 3806 3807 if (connection->authentication_flags & READ_RSSI){ 3808 connectionClearAuthenticationFlags(connection, READ_RSSI); 3809 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3810 return true; 3811 } 3812 3813 #ifdef ENABLE_CLASSIC 3814 3815 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3816 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3817 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3818 return true; 3819 } 3820 3821 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3822 log_info("responding to link key request"); 3823 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3824 3825 link_key_t link_key; 3826 link_key_type_t link_key_type; 3827 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 3828 3829 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3830 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 3831 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 3832 if (sc_downgrade){ 3833 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 3834 connection->state = SENT_DISCONNECT; 3835 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 3836 return true; 3837 } 3838 3839 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 3840 if (have_link_key && security_level_sufficient){ 3841 connection->link_key_type = link_key_type; 3842 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3843 } else { 3844 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3845 } 3846 return true; 3847 } 3848 3849 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3850 log_info("denying to pin request"); 3851 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3852 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3853 return true; 3854 } 3855 3856 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3857 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3858 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3859 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3860 // tweak authentication requirements 3861 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3862 if (connection->bonding_flags & BONDING_DEDICATED){ 3863 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3864 } 3865 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3866 authreq |= 1; 3867 } 3868 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3869 } else { 3870 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3871 } 3872 return true; 3873 } 3874 3875 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3876 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3877 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3878 return true; 3879 } 3880 3881 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3882 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3883 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3884 return true; 3885 } 3886 3887 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 3888 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 3889 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3890 return true; 3891 } 3892 3893 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 3894 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3895 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 3896 return true; 3897 } 3898 3899 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 3900 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3901 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 3902 return true; 3903 } 3904 3905 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3906 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3907 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3908 connection->state = SENT_DISCONNECT; 3909 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3910 return true; 3911 } 3912 3913 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3914 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3915 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 3916 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3917 return true; 3918 } 3919 3920 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3921 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3922 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3923 return true; 3924 } 3925 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3926 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3927 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3928 return true; 3929 } 3930 #endif 3931 3932 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3933 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3934 if (connection->state != SENT_DISCONNECT){ 3935 connection->state = SENT_DISCONNECT; 3936 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 3937 return true; 3938 } 3939 } 3940 3941 #ifdef ENABLE_CLASSIC 3942 uint16_t sniff_min_interval; 3943 switch (connection->sniff_min_interval){ 3944 case 0: 3945 break; 3946 case 0xffff: 3947 connection->sniff_min_interval = 0; 3948 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3949 return true; 3950 default: 3951 sniff_min_interval = connection->sniff_min_interval; 3952 connection->sniff_min_interval = 0; 3953 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3954 return true; 3955 } 3956 #endif 3957 3958 #ifdef ENABLE_BLE 3959 switch (connection->le_con_parameter_update_state){ 3960 // response to L2CAP CON PARAMETER UPDATE REQUEST 3961 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3962 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3963 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3964 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3965 0x0000, 0xffff); 3966 return true; 3967 case CON_PARAMETER_UPDATE_REPLY: 3968 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3969 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3970 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3971 0x0000, 0xffff); 3972 return true; 3973 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3974 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3975 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3976 return true; 3977 default: 3978 break; 3979 } 3980 if (connection->le_phy_update_all_phys != 0xff){ 3981 uint8_t all_phys = connection->le_phy_update_all_phys; 3982 connection->le_phy_update_all_phys = 0xff; 3983 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); 3984 return true; 3985 } 3986 #endif 3987 } 3988 return false; 3989 } 3990 3991 static void hci_run(void){ 3992 3993 bool done; 3994 3995 // send continuation fragments first, as they block the prepared packet buffer 3996 done = hci_run_acl_fragments(); 3997 if (done) return; 3998 3999 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4000 // send host num completed packets next as they don't require num_cmd_packets > 0 4001 if (!hci_can_send_comand_packet_transport()) return; 4002 if (hci_stack->host_completed_packets){ 4003 hci_host_num_completed_packets(); 4004 return; 4005 } 4006 #endif 4007 4008 if (!hci_can_send_command_packet_now()) return; 4009 4010 // global/non-connection oriented commands 4011 4012 4013 #ifdef ENABLE_CLASSIC 4014 // general gap classic 4015 done = hci_run_general_gap_classic(); 4016 if (done) return; 4017 #endif 4018 4019 #ifdef ENABLE_BLE 4020 // general gap le 4021 done = hci_run_general_gap_le(); 4022 if (done) return; 4023 #endif 4024 4025 // send pending HCI commands 4026 done = hci_run_general_pending_commmands(); 4027 if (done) return; 4028 4029 // stack state sub statemachines 4030 hci_connection_t * connection; 4031 switch (hci_stack->state){ 4032 case HCI_STATE_INITIALIZING: 4033 hci_initializing_run(); 4034 break; 4035 4036 case HCI_STATE_HALTING: 4037 4038 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4039 switch (hci_stack->substate){ 4040 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4041 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4042 4043 #ifdef ENABLE_BLE 4044 #ifdef ENABLE_LE_CENTRAL 4045 // free whitelist entries 4046 { 4047 btstack_linked_list_iterator_t lit; 4048 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4049 while (btstack_linked_list_iterator_has_next(&lit)){ 4050 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4051 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4052 btstack_memory_whitelist_entry_free(entry); 4053 } 4054 } 4055 #endif 4056 #endif 4057 // close all open connections 4058 connection = (hci_connection_t *) hci_stack->connections; 4059 if (connection){ 4060 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4061 if (!hci_can_send_command_packet_now()) return; 4062 4063 // check state 4064 if (connection->state == SENT_DISCONNECT) return; 4065 connection->state = SENT_DISCONNECT; 4066 4067 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4068 4069 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4070 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4071 4072 // ... which would be ignored anyway as we shutdown (free) the connection now 4073 hci_shutdown_connection(connection); 4074 4075 // finally, send the disconnect command 4076 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4077 return; 4078 } 4079 4080 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4081 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4082 log_info("HCI_STATE_HALTING: wait 50 ms"); 4083 hci_stack->substate = HCI_HALTING_W4_TIMER; 4084 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4085 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4086 btstack_run_loop_add_timer(&hci_stack->timeout); 4087 break; 4088 } 4089 4090 /* fall through */ 4091 4092 case HCI_HALTING_CLOSE: 4093 log_info("HCI_STATE_HALTING, calling off"); 4094 4095 // switch mode 4096 hci_power_control_off(); 4097 4098 log_info("HCI_STATE_HALTING, emitting state"); 4099 hci_emit_state(); 4100 log_info("HCI_STATE_HALTING, done"); 4101 break; 4102 4103 case HCI_HALTING_W4_TIMER: 4104 // keep waiting 4105 4106 break; 4107 default: 4108 break; 4109 } 4110 4111 break; 4112 4113 case HCI_STATE_FALLING_ASLEEP: 4114 switch(hci_stack->substate) { 4115 case HCI_FALLING_ASLEEP_DISCONNECT: 4116 log_info("HCI_STATE_FALLING_ASLEEP"); 4117 // close all open connections 4118 connection = (hci_connection_t *) hci_stack->connections; 4119 4120 #ifdef HAVE_PLATFORM_IPHONE_OS 4121 // don't close connections, if H4 supports power management 4122 if (btstack_control_iphone_power_management_enabled()){ 4123 connection = NULL; 4124 } 4125 #endif 4126 if (connection){ 4127 4128 // send disconnect 4129 if (!hci_can_send_command_packet_now()) return; 4130 4131 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4132 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4133 4134 // send disconnected event right away - causes higher layer connections to get closed, too. 4135 hci_shutdown_connection(connection); 4136 return; 4137 } 4138 4139 if (hci_classic_supported()){ 4140 // disable page and inquiry scan 4141 if (!hci_can_send_command_packet_now()) return; 4142 4143 log_info("HCI_STATE_HALTING, disabling inq scans"); 4144 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4145 4146 // continue in next sub state 4147 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4148 break; 4149 } 4150 4151 /* fall through */ 4152 4153 case HCI_FALLING_ASLEEP_COMPLETE: 4154 log_info("HCI_STATE_HALTING, calling sleep"); 4155 #ifdef HAVE_PLATFORM_IPHONE_OS 4156 // don't actually go to sleep, if H4 supports power management 4157 if (btstack_control_iphone_power_management_enabled()){ 4158 // SLEEP MODE reached 4159 hci_stack->state = HCI_STATE_SLEEPING; 4160 hci_emit_state(); 4161 break; 4162 } 4163 #endif 4164 // switch mode 4165 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4166 hci_emit_state(); 4167 break; 4168 4169 default: 4170 break; 4171 } 4172 break; 4173 4174 default: 4175 break; 4176 } 4177 } 4178 4179 int hci_send_cmd_packet(uint8_t *packet, int size){ 4180 // house-keeping 4181 4182 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 4183 hci_stack->loopback_mode = packet[3]; 4184 } 4185 4186 #ifdef ENABLE_CLASSIC 4187 bd_addr_t addr; 4188 hci_connection_t * conn; 4189 4190 // create_connection? 4191 if (IS_COMMAND(packet, hci_create_connection)){ 4192 reverse_bd_addr(&packet[3], addr); 4193 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4194 4195 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4196 if (!conn){ 4197 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4198 if (!conn){ 4199 // notify client that alloc failed 4200 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4201 return -1; // packet not sent to controller 4202 } 4203 conn->state = SEND_CREATE_CONNECTION; 4204 } 4205 log_info("conn state %u", conn->state); 4206 switch (conn->state){ 4207 // if connection active exists 4208 case OPEN: 4209 // and OPEN, emit connection complete command 4210 hci_emit_connection_complete(addr, conn->con_handle, 0); 4211 return -1; // packet not sent to controller 4212 case RECEIVED_DISCONNECTION_COMPLETE: 4213 // create connection triggered in disconnect complete event, let's do it now 4214 break; 4215 case SEND_CREATE_CONNECTION: 4216 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4217 break; 4218 default: 4219 // otherwise, just ignore as it is already in the open process 4220 return -1; // packet not sent to controller 4221 } 4222 conn->state = SENT_CREATE_CONNECTION; 4223 4224 // track outgoing connection 4225 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4226 (void)memcpy(hci_stack->outgoing_addr, addr, 6); 4227 } 4228 4229 else if (IS_COMMAND(packet, hci_link_key_request_reply)){ 4230 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4231 } 4232 else if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 4233 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4234 } 4235 4236 else if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 4237 if (hci_stack->link_key_db){ 4238 reverse_bd_addr(&packet[3], addr); 4239 hci_stack->link_key_db->delete_link_key(addr); 4240 } 4241 } 4242 4243 else if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 4244 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 4245 reverse_bd_addr(&packet[3], addr); 4246 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4247 if (conn){ 4248 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4249 } 4250 } 4251 4252 else if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 4253 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 4254 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 4255 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 4256 reverse_bd_addr(&packet[3], addr); 4257 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4258 if (conn){ 4259 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4260 } 4261 } 4262 4263 #ifdef ENABLE_SCO_OVER_HCI 4264 // setup_synchronous_connection? Voice setting at offset 22 4265 else if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 4266 // TODO: compare to current setting if sco connection already active 4267 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4268 } 4269 // accept_synchronus_connection? Voice setting at offset 18 4270 else if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 4271 // TODO: compare to current setting if sco connection already active 4272 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4273 } 4274 #endif 4275 #endif 4276 4277 #ifdef ENABLE_BLE 4278 else if (IS_COMMAND(packet, hci_le_set_random_address)){ 4279 hci_stack->le_random_address_set = 1; 4280 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4281 } 4282 #ifdef ENABLE_LE_PERIPHERAL 4283 else if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 4284 hci_stack->le_advertisements_active = packet[3]; 4285 } 4286 #endif 4287 #ifdef ENABLE_LE_CENTRAL 4288 else if (IS_COMMAND(packet, hci_le_create_connection)){ 4289 // white list used? 4290 uint8_t initiator_filter_policy = packet[7]; 4291 switch (initiator_filter_policy){ 4292 case 0: 4293 // whitelist not used 4294 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4295 break; 4296 case 1: 4297 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4298 break; 4299 default: 4300 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4301 break; 4302 } 4303 } 4304 else if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4305 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4306 } 4307 #endif 4308 #endif 4309 4310 hci_stack->num_cmd_packets--; 4311 4312 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4313 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4314 } 4315 4316 // disconnect because of security block 4317 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4318 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4319 if (!connection) return; 4320 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4321 } 4322 4323 4324 // Configure Secure Simple Pairing 4325 4326 #ifdef ENABLE_CLASSIC 4327 4328 // enable will enable SSP during init 4329 void gap_ssp_set_enable(int enable){ 4330 hci_stack->ssp_enable = enable; 4331 } 4332 4333 static int hci_local_ssp_activated(void){ 4334 return gap_ssp_supported() && hci_stack->ssp_enable; 4335 } 4336 4337 // if set, BTstack will respond to io capability request using authentication requirement 4338 void gap_ssp_set_io_capability(int io_capability){ 4339 hci_stack->ssp_io_capability = io_capability; 4340 } 4341 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4342 hci_stack->ssp_authentication_requirement = authentication_requirement; 4343 } 4344 4345 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4346 void gap_ssp_set_auto_accept(int auto_accept){ 4347 hci_stack->ssp_auto_accept = auto_accept; 4348 } 4349 4350 void gap_secure_connections_enable(bool enable){ 4351 hci_stack->secure_connections_enable = enable; 4352 } 4353 4354 #endif 4355 4356 // va_list part of hci_send_cmd 4357 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4358 if (!hci_can_send_command_packet_now()){ 4359 log_error("hci_send_cmd called but cannot send packet now"); 4360 return 0; 4361 } 4362 4363 // for HCI INITIALIZATION 4364 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4365 hci_stack->last_cmd_opcode = cmd->opcode; 4366 4367 hci_reserve_packet_buffer(); 4368 uint8_t * packet = hci_stack->hci_packet_buffer; 4369 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4370 int err = hci_send_cmd_packet(packet, size); 4371 4372 // release packet buffer on error or for synchronous transport implementations 4373 if ((err < 0) || hci_transport_synchronous()){ 4374 hci_release_packet_buffer(); 4375 hci_emit_transport_packet_sent(); 4376 } 4377 4378 return err; 4379 } 4380 4381 /** 4382 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4383 */ 4384 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4385 va_list argptr; 4386 va_start(argptr, cmd); 4387 int res = hci_send_cmd_va_arg(cmd, argptr); 4388 va_end(argptr); 4389 return res; 4390 } 4391 4392 // Create various non-HCI events. 4393 // TODO: generalize, use table similar to hci_create_command 4394 4395 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4396 // dump packet 4397 if (dump) { 4398 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4399 } 4400 4401 // dispatch to all event handlers 4402 btstack_linked_list_iterator_t it; 4403 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4404 while (btstack_linked_list_iterator_has_next(&it)){ 4405 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4406 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4407 } 4408 } 4409 4410 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4411 if (!hci_stack->acl_packet_handler) return; 4412 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4413 } 4414 4415 #ifdef ENABLE_CLASSIC 4416 static void hci_notify_if_sco_can_send_now(void){ 4417 // notify SCO sender if waiting 4418 if (!hci_stack->sco_waiting_for_can_send_now) return; 4419 if (hci_can_send_sco_packet_now()){ 4420 hci_stack->sco_waiting_for_can_send_now = 0; 4421 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4422 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4423 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4424 } 4425 } 4426 4427 // parsing end emitting has been merged to reduce code size 4428 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4429 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4430 4431 uint8_t * eir_data; 4432 ad_context_t context; 4433 const uint8_t * name; 4434 uint8_t name_len; 4435 4436 if (size < 3) return; 4437 4438 int event_type = hci_event_packet_get_type(packet); 4439 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4440 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4441 4442 switch (event_type){ 4443 case HCI_EVENT_INQUIRY_RESULT: 4444 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4445 if (size != (3 + (num_responses * 14))) return; 4446 break; 4447 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4448 if (size != 257) return; 4449 if (num_responses != 1) return; 4450 break; 4451 default: 4452 return; 4453 } 4454 4455 // event[1] is set at the end 4456 int i; 4457 for (i=0; i<num_responses;i++){ 4458 memset(event, 0, sizeof(event)); 4459 event[0] = GAP_EVENT_INQUIRY_RESULT; 4460 uint8_t event_size = 18; // if name is not set by EIR 4461 4462 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4463 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4464 (void)memcpy(&event[9], 4465 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4466 3); // class of device 4467 (void)memcpy(&event[12], 4468 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4469 2); // clock offset 4470 4471 switch (event_type){ 4472 case HCI_EVENT_INQUIRY_RESULT: 4473 // 14,15,16,17 = 0, size 18 4474 break; 4475 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4476 event[14] = 1; 4477 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4478 // 16,17 = 0, size 18 4479 break; 4480 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4481 event[14] = 1; 4482 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4483 // EIR packets only contain a single inquiry response 4484 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4485 name = NULL; 4486 // Iterate over EIR data 4487 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4488 uint8_t data_type = ad_iterator_get_data_type(&context); 4489 uint8_t data_size = ad_iterator_get_data_len(&context); 4490 const uint8_t * data = ad_iterator_get_data(&context); 4491 // Prefer Complete Local Name over Shortend Local Name 4492 switch (data_type){ 4493 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4494 if (name) continue; 4495 /* fall through */ 4496 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4497 name = data; 4498 name_len = data_size; 4499 break; 4500 default: 4501 break; 4502 } 4503 } 4504 if (name){ 4505 event[16] = 1; 4506 // truncate name if needed 4507 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4508 event[17] = len; 4509 (void)memcpy(&event[18], name, len); 4510 event_size += len; 4511 } 4512 break; 4513 } 4514 event[1] = event_size - 2; 4515 hci_emit_event(event, event_size, 1); 4516 } 4517 } 4518 #endif 4519 4520 void hci_emit_state(void){ 4521 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4522 uint8_t event[3]; 4523 event[0] = BTSTACK_EVENT_STATE; 4524 event[1] = sizeof(event) - 2; 4525 event[2] = hci_stack->state; 4526 hci_emit_event(event, sizeof(event), 1); 4527 } 4528 4529 #ifdef ENABLE_CLASSIC 4530 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4531 uint8_t event[13]; 4532 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4533 event[1] = sizeof(event) - 2; 4534 event[2] = status; 4535 little_endian_store_16(event, 3, con_handle); 4536 reverse_bd_addr(address, &event[5]); 4537 event[11] = 1; // ACL connection 4538 event[12] = 0; // encryption disabled 4539 hci_emit_event(event, sizeof(event), 1); 4540 } 4541 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4542 if (disable_l2cap_timeouts) return; 4543 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4544 uint8_t event[4]; 4545 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4546 event[1] = sizeof(event) - 2; 4547 little_endian_store_16(event, 2, conn->con_handle); 4548 hci_emit_event(event, sizeof(event), 1); 4549 } 4550 #endif 4551 4552 #ifdef ENABLE_BLE 4553 #ifdef ENABLE_LE_CENTRAL 4554 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4555 uint8_t event[21]; 4556 event[0] = HCI_EVENT_LE_META; 4557 event[1] = sizeof(event) - 2; 4558 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4559 event[3] = status; 4560 little_endian_store_16(event, 4, con_handle); 4561 event[6] = 0; // TODO: role 4562 event[7] = address_type; 4563 reverse_bd_addr(address, &event[8]); 4564 little_endian_store_16(event, 14, 0); // interval 4565 little_endian_store_16(event, 16, 0); // latency 4566 little_endian_store_16(event, 18, 0); // supervision timeout 4567 event[20] = 0; // master clock accuracy 4568 hci_emit_event(event, sizeof(event), 1); 4569 } 4570 #endif 4571 #endif 4572 4573 static void hci_emit_transport_packet_sent(void){ 4574 // notify upper stack that it might be possible to send again 4575 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4576 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4577 } 4578 4579 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4580 uint8_t event[6]; 4581 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4582 event[1] = sizeof(event) - 2; 4583 event[2] = 0; // status = OK 4584 little_endian_store_16(event, 3, con_handle); 4585 event[5] = reason; 4586 hci_emit_event(event, sizeof(event), 1); 4587 } 4588 4589 static void hci_emit_nr_connections_changed(void){ 4590 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4591 uint8_t event[3]; 4592 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4593 event[1] = sizeof(event) - 2; 4594 event[2] = nr_hci_connections(); 4595 hci_emit_event(event, sizeof(event), 1); 4596 } 4597 4598 static void hci_emit_hci_open_failed(void){ 4599 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4600 uint8_t event[2]; 4601 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4602 event[1] = sizeof(event) - 2; 4603 hci_emit_event(event, sizeof(event), 1); 4604 } 4605 4606 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4607 log_info("hci_emit_dedicated_bonding_result %u ", status); 4608 uint8_t event[9]; 4609 int pos = 0; 4610 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4611 event[pos++] = sizeof(event) - 2; 4612 event[pos++] = status; 4613 reverse_bd_addr(address, &event[pos]); 4614 hci_emit_event(event, sizeof(event), 1); 4615 } 4616 4617 4618 #ifdef ENABLE_CLASSIC 4619 4620 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4621 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4622 uint8_t event[5]; 4623 int pos = 0; 4624 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4625 event[pos++] = sizeof(event) - 2; 4626 little_endian_store_16(event, 2, con_handle); 4627 pos += 2; 4628 event[pos++] = level; 4629 hci_emit_event(event, sizeof(event), 1); 4630 } 4631 4632 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4633 if (!connection) return LEVEL_0; 4634 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4635 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 4636 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4637 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4638 // LEVEL 4 always requires 128 bit encrytion key size 4639 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4640 security_level = LEVEL_3; 4641 } 4642 return security_level; 4643 } 4644 4645 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4646 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4647 uint8_t event[3]; 4648 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4649 event[1] = sizeof(event) - 2; 4650 event[2] = enabled; 4651 hci_emit_event(event, sizeof(event), 1); 4652 } 4653 4654 // query if remote side supports eSCO 4655 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4656 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4657 if (!connection) return 0; 4658 return (connection->remote_supported_features[0] & 1) != 0; 4659 } 4660 4661 static bool hci_ssp_supported(hci_connection_t * connection){ 4662 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4663 return (connection->bonding_flags & mask) == mask; 4664 } 4665 4666 // query if remote side supports SSP 4667 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4668 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4669 if (!connection) return 0; 4670 return hci_ssp_supported(connection) ? 1 : 0; 4671 } 4672 4673 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4674 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4675 } 4676 4677 // GAP API 4678 /** 4679 * @bbrief enable/disable bonding. default is enabled 4680 * @praram enabled 4681 */ 4682 void gap_set_bondable_mode(int enable){ 4683 hci_stack->bondable = enable ? 1 : 0; 4684 } 4685 /** 4686 * @brief Get bondable mode. 4687 * @return 1 if bondable 4688 */ 4689 int gap_get_bondable_mode(void){ 4690 return hci_stack->bondable; 4691 } 4692 4693 /** 4694 * @brief map link keys to security levels 4695 */ 4696 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4697 switch (link_key_type){ 4698 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4699 return LEVEL_4; 4700 case COMBINATION_KEY: 4701 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4702 return LEVEL_3; 4703 default: 4704 return LEVEL_2; 4705 } 4706 } 4707 4708 /** 4709 * @brief map link keys to secure connection yes/no 4710 */ 4711 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4712 switch (link_key_type){ 4713 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4714 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4715 return 1; 4716 default: 4717 return 0; 4718 } 4719 } 4720 4721 /** 4722 * @brief map link keys to authenticated 4723 */ 4724 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4725 switch (link_key_type){ 4726 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4727 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4728 return 1; 4729 default: 4730 return 0; 4731 } 4732 } 4733 4734 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4735 log_info("gap_mitm_protection_required_for_security_level %u", level); 4736 return level > LEVEL_2; 4737 } 4738 4739 /** 4740 * @brief get current security level 4741 */ 4742 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4743 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4744 if (!connection) return LEVEL_0; 4745 return gap_security_level_for_connection(connection); 4746 } 4747 4748 /** 4749 * @brief request connection to device to 4750 * @result GAP_AUTHENTICATION_RESULT 4751 */ 4752 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4753 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4754 if (!connection){ 4755 hci_emit_security_level(con_handle, LEVEL_0); 4756 return; 4757 } 4758 gap_security_level_t current_level = gap_security_level(con_handle); 4759 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4760 requested_level, connection->requested_security_level, current_level); 4761 4762 // assumption: earlier requested security higher than current level => security request is active 4763 if (current_level < connection->requested_security_level){ 4764 if (connection->requested_security_level < requested_level){ 4765 // increase requested level as new level is higher 4766 4767 // TODO: handle re-authentication when done 4768 4769 connection->requested_security_level = requested_level; 4770 } 4771 return; 4772 } 4773 4774 // no request active, notify if security sufficient 4775 if (requested_level <= current_level){ 4776 hci_emit_security_level(con_handle, current_level); 4777 return; 4778 } 4779 4780 // start pairing to increase security level 4781 connection->requested_security_level = requested_level; 4782 4783 #if 0 4784 // sending encryption request without a link key results in an error. 4785 // TODO: figure out how to use it properly 4786 4787 // would enabling ecnryption suffice (>= LEVEL_2)? 4788 if (hci_stack->link_key_db){ 4789 link_key_type_t link_key_type; 4790 link_key_t link_key; 4791 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4792 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4793 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4794 return; 4795 } 4796 } 4797 } 4798 #endif 4799 4800 // start to authenticate connection if not already active 4801 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 4802 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4803 hci_run(); 4804 } 4805 4806 /** 4807 * @brief start dedicated bonding with device. disconnect after bonding 4808 * @param device 4809 * @param request MITM protection 4810 * @result GAP_DEDICATED_BONDING_COMPLETE 4811 */ 4812 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4813 4814 // create connection state machine 4815 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4816 4817 if (!connection){ 4818 return BTSTACK_MEMORY_ALLOC_FAILED; 4819 } 4820 4821 // delete linkn key 4822 gap_drop_link_key_for_bd_addr(device); 4823 4824 // configure LEVEL_2/3, dedicated bonding 4825 connection->state = SEND_CREATE_CONNECTION; 4826 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4827 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4828 connection->bonding_flags = BONDING_DEDICATED; 4829 4830 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4831 4832 // handle: connnection failure (connection complete != ok) 4833 // handle: authentication failure 4834 // handle: disconnect on done 4835 4836 hci_run(); 4837 4838 return 0; 4839 } 4840 #endif 4841 4842 void gap_set_local_name(const char * local_name){ 4843 hci_stack->local_name = local_name; 4844 } 4845 4846 4847 #ifdef ENABLE_BLE 4848 4849 #ifdef ENABLE_LE_CENTRAL 4850 void gap_start_scan(void){ 4851 hci_stack->le_scanning_enabled = 1; 4852 hci_run(); 4853 } 4854 4855 void gap_stop_scan(void){ 4856 hci_stack->le_scanning_enabled = 0; 4857 hci_run(); 4858 } 4859 4860 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4861 hci_stack->le_scan_type = scan_type; 4862 hci_stack->le_scan_interval = scan_interval; 4863 hci_stack->le_scan_window = scan_window; 4864 hci_run(); 4865 } 4866 4867 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4868 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4869 if (!conn){ 4870 log_info("gap_connect: no connection exists yet, creating context"); 4871 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4872 if (!conn){ 4873 // notify client that alloc failed 4874 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4875 log_info("gap_connect: failed to alloc hci_connection_t"); 4876 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4877 } 4878 conn->state = SEND_CREATE_CONNECTION; 4879 log_info("gap_connect: send create connection next"); 4880 hci_run(); 4881 return ERROR_CODE_SUCCESS; 4882 } 4883 4884 if (!hci_is_le_connection(conn) || 4885 (conn->state == SEND_CREATE_CONNECTION) || 4886 (conn->state == SENT_CREATE_CONNECTION)) { 4887 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4888 log_error("gap_connect: classic connection or connect is already being created"); 4889 return GATT_CLIENT_IN_WRONG_STATE; 4890 } 4891 4892 // check if connection was just disconnected 4893 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4894 log_info("gap_connect: send create connection (again)"); 4895 conn->state = SEND_CREATE_CONNECTION; 4896 hci_run(); 4897 return ERROR_CODE_SUCCESS; 4898 } 4899 4900 log_info("gap_connect: context exists with state %u", conn->state); 4901 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4902 hci_run(); 4903 return ERROR_CODE_SUCCESS; 4904 } 4905 4906 // @assumption: only a single outgoing LE Connection exists 4907 static hci_connection_t * gap_get_outgoing_connection(void){ 4908 btstack_linked_item_t *it; 4909 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4910 hci_connection_t * conn = (hci_connection_t *) it; 4911 if (!hci_is_le_connection(conn)) continue; 4912 switch (conn->state){ 4913 case SEND_CREATE_CONNECTION: 4914 case SENT_CREATE_CONNECTION: 4915 case SENT_CANCEL_CONNECTION: 4916 return conn; 4917 default: 4918 break; 4919 }; 4920 } 4921 return NULL; 4922 } 4923 4924 uint8_t gap_connect_cancel(void){ 4925 hci_connection_t * conn = gap_get_outgoing_connection(); 4926 if (!conn) return 0; 4927 switch (conn->state){ 4928 case SEND_CREATE_CONNECTION: 4929 // skip sending create connection and emit event instead 4930 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4931 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4932 btstack_memory_hci_connection_free( conn ); 4933 break; 4934 case SENT_CREATE_CONNECTION: 4935 // request to send cancel connection 4936 conn->state = SEND_CANCEL_CONNECTION; 4937 hci_run(); 4938 break; 4939 default: 4940 break; 4941 } 4942 return 0; 4943 } 4944 #endif 4945 4946 #ifdef ENABLE_LE_CENTRAL 4947 /** 4948 * @brief Set connection parameters for outgoing connections 4949 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4950 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4951 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4952 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4953 * @param conn_latency, default: 4 4954 * @param supervision_timeout (unit: 10ms), default: 720 ms 4955 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4956 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4957 */ 4958 4959 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4960 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4961 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4962 hci_stack->le_connection_scan_interval = conn_scan_interval; 4963 hci_stack->le_connection_scan_window = conn_scan_window; 4964 hci_stack->le_connection_interval_min = conn_interval_min; 4965 hci_stack->le_connection_interval_max = conn_interval_max; 4966 hci_stack->le_connection_latency = conn_latency; 4967 hci_stack->le_supervision_timeout = supervision_timeout; 4968 hci_stack->le_minimum_ce_length = min_ce_length; 4969 hci_stack->le_maximum_ce_length = max_ce_length; 4970 } 4971 #endif 4972 4973 /** 4974 * @brief Updates the connection parameters for a given LE connection 4975 * @param handle 4976 * @param conn_interval_min (unit: 1.25ms) 4977 * @param conn_interval_max (unit: 1.25ms) 4978 * @param conn_latency 4979 * @param supervision_timeout (unit: 10ms) 4980 * @returns 0 if ok 4981 */ 4982 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4983 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4984 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4985 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4986 connection->le_conn_interval_min = conn_interval_min; 4987 connection->le_conn_interval_max = conn_interval_max; 4988 connection->le_conn_latency = conn_latency; 4989 connection->le_supervision_timeout = supervision_timeout; 4990 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4991 hci_run(); 4992 return 0; 4993 } 4994 4995 /** 4996 * @brief Request an update of the connection parameter for a given LE connection 4997 * @param handle 4998 * @param conn_interval_min (unit: 1.25ms) 4999 * @param conn_interval_max (unit: 1.25ms) 5000 * @param conn_latency 5001 * @param supervision_timeout (unit: 10ms) 5002 * @returns 0 if ok 5003 */ 5004 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5005 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5006 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5007 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5008 connection->le_conn_interval_min = conn_interval_min; 5009 connection->le_conn_interval_max = conn_interval_max; 5010 connection->le_conn_latency = conn_latency; 5011 connection->le_supervision_timeout = supervision_timeout; 5012 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5013 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5014 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5015 return 0; 5016 } 5017 5018 #ifdef ENABLE_LE_PERIPHERAL 5019 5020 static void gap_advertisments_changed(void){ 5021 // disable advertisements before updating adv, scan data, or adv params 5022 if (hci_stack->le_advertisements_active){ 5023 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 5024 } 5025 hci_run(); 5026 } 5027 5028 /** 5029 * @brief Set Advertisement Data 5030 * @param advertising_data_length 5031 * @param advertising_data (max 31 octets) 5032 * @note data is not copied, pointer has to stay valid 5033 */ 5034 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5035 hci_stack->le_advertisements_data_len = advertising_data_length; 5036 hci_stack->le_advertisements_data = advertising_data; 5037 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5038 gap_advertisments_changed(); 5039 } 5040 5041 /** 5042 * @brief Set Scan Response Data 5043 * @param advertising_data_length 5044 * @param advertising_data (max 31 octets) 5045 * @note data is not copied, pointer has to stay valid 5046 */ 5047 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5048 hci_stack->le_scan_response_data_len = scan_response_data_length; 5049 hci_stack->le_scan_response_data = scan_response_data; 5050 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5051 gap_advertisments_changed(); 5052 } 5053 5054 /** 5055 * @brief Set Advertisement Parameters 5056 * @param adv_int_min 5057 * @param adv_int_max 5058 * @param adv_type 5059 * @param direct_address_type 5060 * @param direct_address 5061 * @param channel_map 5062 * @param filter_policy 5063 * 5064 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5065 */ 5066 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5067 uint8_t direct_address_typ, bd_addr_t direct_address, 5068 uint8_t channel_map, uint8_t filter_policy) { 5069 5070 hci_stack->le_advertisements_interval_min = adv_int_min; 5071 hci_stack->le_advertisements_interval_max = adv_int_max; 5072 hci_stack->le_advertisements_type = adv_type; 5073 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5074 hci_stack->le_advertisements_channel_map = channel_map; 5075 hci_stack->le_advertisements_filter_policy = filter_policy; 5076 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5077 6); 5078 5079 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5080 gap_advertisments_changed(); 5081 } 5082 5083 /** 5084 * @brief Enable/Disable Advertisements 5085 * @param enabled 5086 */ 5087 void gap_advertisements_enable(int enabled){ 5088 hci_stack->le_advertisements_enabled = enabled; 5089 if (enabled && !hci_stack->le_advertisements_active){ 5090 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 5091 } 5092 if (!enabled && hci_stack->le_advertisements_active){ 5093 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 5094 } 5095 hci_run(); 5096 } 5097 5098 #endif 5099 5100 void hci_le_set_own_address_type(uint8_t own_address_type){ 5101 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5102 if (own_address_type == hci_stack->le_own_addr_type) return; 5103 hci_stack->le_own_addr_type = own_address_type; 5104 5105 #ifdef ENABLE_LE_PERIPHERAL 5106 // update advertisement parameters, too 5107 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5108 gap_advertisments_changed(); 5109 #endif 5110 #ifdef ENABLE_LE_CENTRAL 5111 // note: we don't update scan parameters or modify ongoing connection attempts 5112 #endif 5113 } 5114 5115 #endif 5116 5117 uint8_t gap_disconnect(hci_con_handle_t handle){ 5118 hci_connection_t * conn = hci_connection_for_handle(handle); 5119 if (!conn){ 5120 hci_emit_disconnection_complete(handle, 0); 5121 return 0; 5122 } 5123 // ignore if already disconnected 5124 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5125 return 0; 5126 } 5127 conn->state = SEND_DISCONNECT; 5128 hci_run(); 5129 return 0; 5130 } 5131 5132 int gap_read_rssi(hci_con_handle_t con_handle){ 5133 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5134 if (hci_connection == NULL) return 0; 5135 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5136 hci_run(); 5137 return 1; 5138 } 5139 5140 /** 5141 * @brief Get connection type 5142 * @param con_handle 5143 * @result connection_type 5144 */ 5145 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5146 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5147 if (!conn) return GAP_CONNECTION_INVALID; 5148 switch (conn->address_type){ 5149 case BD_ADDR_TYPE_LE_PUBLIC: 5150 case BD_ADDR_TYPE_LE_RANDOM: 5151 return GAP_CONNECTION_LE; 5152 case BD_ADDR_TYPE_SCO: 5153 return GAP_CONNECTION_SCO; 5154 case BD_ADDR_TYPE_ACL: 5155 return GAP_CONNECTION_ACL; 5156 default: 5157 return GAP_CONNECTION_INVALID; 5158 } 5159 } 5160 5161 #ifdef ENABLE_BLE 5162 5163 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){ 5164 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5165 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5166 5167 conn->le_phy_update_all_phys = all_phys; 5168 conn->le_phy_update_tx_phys = tx_phys; 5169 conn->le_phy_update_rx_phys = rx_phys; 5170 conn->le_phy_update_phy_options = phy_options; 5171 5172 hci_run(); 5173 5174 return 0; 5175 } 5176 5177 #ifdef ENABLE_LE_CENTRAL 5178 /** 5179 * @brief Auto Connection Establishment - Start Connecting to device 5180 * @param address_typ 5181 * @param address 5182 * @returns 0 if ok 5183 */ 5184 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 5185 // check capacity 5186 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 5187 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 5188 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5189 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5190 entry->address_type = address_type; 5191 (void)memcpy(entry->address, address, 6); 5192 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5193 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5194 hci_run(); 5195 return 0; 5196 } 5197 5198 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5199 btstack_linked_list_iterator_t it; 5200 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5201 while (btstack_linked_list_iterator_has_next(&it)){ 5202 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5203 if (entry->address_type != address_type) continue; 5204 if (memcmp(entry->address, address, 6) != 0) continue; 5205 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5206 // remove from controller if already present 5207 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5208 continue; 5209 } 5210 // direclty remove entry from whitelist 5211 btstack_linked_list_iterator_remove(&it); 5212 btstack_memory_whitelist_entry_free(entry); 5213 } 5214 } 5215 5216 /** 5217 * @brief Auto Connection Establishment - Stop Connecting to device 5218 * @param address_typ 5219 * @param address 5220 * @returns 0 if ok 5221 */ 5222 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5223 hci_remove_from_whitelist(address_type, address); 5224 hci_run(); 5225 return 0; 5226 } 5227 5228 /** 5229 * @brief Auto Connection Establishment - Stop everything 5230 * @note Convenience function to stop all active auto connection attempts 5231 */ 5232 void gap_auto_connection_stop_all(void){ 5233 btstack_linked_list_iterator_t it; 5234 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5235 while (btstack_linked_list_iterator_has_next(&it)){ 5236 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5237 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5238 // remove from controller if already present 5239 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5240 continue; 5241 } 5242 // directly remove entry from whitelist 5243 btstack_linked_list_iterator_remove(&it); 5244 btstack_memory_whitelist_entry_free(entry); 5245 } 5246 hci_run(); 5247 } 5248 5249 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5250 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5251 if (!conn) return 0; 5252 return conn->le_connection_interval; 5253 } 5254 #endif 5255 #endif 5256 5257 #ifdef ENABLE_CLASSIC 5258 /** 5259 * @brief Set Extended Inquiry Response data 5260 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5261 * @note has to be done before stack starts up 5262 */ 5263 void gap_set_extended_inquiry_response(const uint8_t * data){ 5264 hci_stack->eir_data = data; 5265 } 5266 5267 /** 5268 * @brief Start GAP Classic Inquiry 5269 * @param duration in 1.28s units 5270 * @return 0 if ok 5271 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5272 */ 5273 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5274 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5275 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5276 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5277 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5278 } 5279 hci_stack->inquiry_state = duration_in_1280ms_units; 5280 hci_run(); 5281 return 0; 5282 } 5283 5284 /** 5285 * @brief Stop GAP Classic Inquiry 5286 * @returns 0 if ok 5287 */ 5288 int gap_inquiry_stop(void){ 5289 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5290 // emit inquiry complete event, before it even started 5291 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5292 hci_emit_event(event, sizeof(event), 1); 5293 return 0; 5294 } 5295 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5296 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5297 hci_run(); 5298 return 0; 5299 } 5300 5301 5302 /** 5303 * @brief Remote Name Request 5304 * @param addr 5305 * @param page_scan_repetition_mode 5306 * @param clock_offset only used when bit 15 is set 5307 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5308 */ 5309 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5310 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5311 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5312 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5313 hci_stack->remote_name_clock_offset = clock_offset; 5314 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5315 hci_run(); 5316 return 0; 5317 } 5318 5319 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5320 hci_stack->gap_pairing_state = state; 5321 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5322 hci_run(); 5323 return 0; 5324 } 5325 5326 /** 5327 * @brief Legacy Pairing Pin Code Response 5328 * @param addr 5329 * @param pin 5330 * @return 0 if ok 5331 */ 5332 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5333 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5334 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5335 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5336 } 5337 5338 /** 5339 * @brief Abort Legacy Pairing 5340 * @param addr 5341 * @param pin 5342 * @return 0 if ok 5343 */ 5344 int gap_pin_code_negative(bd_addr_t addr){ 5345 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5346 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5347 } 5348 5349 /** 5350 * @brief SSP Passkey Response 5351 * @param addr 5352 * @param passkey 5353 * @return 0 if ok 5354 */ 5355 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5356 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5357 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5358 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5359 } 5360 5361 /** 5362 * @brief Abort SSP Passkey Entry/Pairing 5363 * @param addr 5364 * @param pin 5365 * @return 0 if ok 5366 */ 5367 int gap_ssp_passkey_negative(bd_addr_t addr){ 5368 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5369 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5370 } 5371 5372 /** 5373 * @brief Accept SSP Numeric Comparison 5374 * @param addr 5375 * @param passkey 5376 * @return 0 if ok 5377 */ 5378 int gap_ssp_confirmation_response(bd_addr_t addr){ 5379 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5380 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5381 } 5382 5383 /** 5384 * @brief Abort SSP Numeric Comparison/Pairing 5385 * @param addr 5386 * @param pin 5387 * @return 0 if ok 5388 */ 5389 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5390 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5391 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5392 } 5393 5394 /** 5395 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5396 * @param inquiry_mode see bluetooth_defines.h 5397 */ 5398 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5399 hci_stack->inquiry_mode = mode; 5400 } 5401 5402 /** 5403 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5404 */ 5405 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5406 hci_stack->sco_voice_setting = voice_setting; 5407 } 5408 5409 /** 5410 * @brief Get SCO Voice Setting 5411 * @return current voice setting 5412 */ 5413 uint16_t hci_get_sco_voice_setting(void){ 5414 return hci_stack->sco_voice_setting; 5415 } 5416 5417 static int hci_have_usb_transport(void){ 5418 if (!hci_stack->hci_transport) return 0; 5419 const char * transport_name = hci_stack->hci_transport->name; 5420 if (!transport_name) return 0; 5421 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5422 } 5423 5424 /** @brief Get SCO packet length for current SCO Voice setting 5425 * @note Using SCO packets of the exact length is required for USB transfer 5426 * @return Length of SCO packets in bytes (not audio frames) 5427 */ 5428 int hci_get_sco_packet_length(void){ 5429 int sco_packet_length = 0; 5430 5431 #ifdef ENABLE_SCO_OVER_HCI 5432 5433 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5434 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5435 5436 if (hci_have_usb_transport()){ 5437 // see Core Spec for H2 USB Transfer. 5438 // 3 byte SCO header + 24 bytes per connection 5439 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5440 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5441 } else { 5442 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5443 sco_packet_length = 3 + 60 * multiplier; 5444 // assert that it still fits inside an SCO buffer 5445 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5446 sco_packet_length = 3 + 60; 5447 } 5448 } 5449 #endif 5450 return sco_packet_length; 5451 } 5452 5453 /** 5454 * @brief Sets the master/slave policy 5455 * @param policy (0: attempt to become master, 1: let connecting device decide) 5456 */ 5457 void hci_set_master_slave_policy(uint8_t policy){ 5458 hci_stack->master_slave_policy = policy; 5459 } 5460 5461 #endif 5462 5463 HCI_STATE hci_get_state(void){ 5464 return hci_stack->state; 5465 } 5466 5467 #ifdef ENABLE_CLASSIC 5468 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5469 hci_stack->gap_classic_accept_callback = accept_callback; 5470 } 5471 #endif 5472 5473 /** 5474 * @brief Set callback for Bluetooth Hardware Error 5475 */ 5476 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5477 hci_stack->hardware_error_callback = fn; 5478 } 5479 5480 void hci_disconnect_all(void){ 5481 btstack_linked_list_iterator_t it; 5482 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5483 while (btstack_linked_list_iterator_has_next(&it)){ 5484 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5485 if (con->state == SENT_DISCONNECT) continue; 5486 con->state = SEND_DISCONNECT; 5487 } 5488 hci_run(); 5489 } 5490 5491 uint16_t hci_get_manufacturer(void){ 5492 return hci_stack->manufacturer; 5493 } 5494 5495 #ifdef ENABLE_BLE 5496 5497 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5498 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5499 if (!hci_con) return NULL; 5500 return &hci_con->sm_connection; 5501 } 5502 5503 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5504 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5505 5506 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5507 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5508 if (hci_connection == NULL) return 0; 5509 if (hci_is_le_connection(hci_connection)){ 5510 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5511 if (sm_conn->sm_connection_encrypted) { 5512 return sm_conn->sm_actual_encryption_key_size; 5513 } 5514 } 5515 #ifdef ENABLE_CLASSIC 5516 else { 5517 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5518 return hci_connection->encryption_key_size; 5519 } 5520 } 5521 #endif 5522 return 0; 5523 } 5524 5525 int gap_authenticated(hci_con_handle_t con_handle){ 5526 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5527 if (hci_connection == NULL) return 0; 5528 5529 switch (hci_connection->address_type){ 5530 case BD_ADDR_TYPE_LE_PUBLIC: 5531 case BD_ADDR_TYPE_LE_RANDOM: 5532 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5533 return hci_connection->sm_connection.sm_connection_authenticated; 5534 #ifdef ENABLE_CLASSIC 5535 case BD_ADDR_TYPE_SCO: 5536 case BD_ADDR_TYPE_ACL: 5537 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5538 #endif 5539 default: 5540 return 0; 5541 } 5542 } 5543 5544 int gap_secure_connection(hci_con_handle_t con_handle){ 5545 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5546 if (hci_connection == NULL) return 0; 5547 5548 switch (hci_connection->address_type){ 5549 case BD_ADDR_TYPE_LE_PUBLIC: 5550 case BD_ADDR_TYPE_LE_RANDOM: 5551 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5552 return hci_connection->sm_connection.sm_connection_sc; 5553 #ifdef ENABLE_CLASSIC 5554 case BD_ADDR_TYPE_SCO: 5555 case BD_ADDR_TYPE_ACL: 5556 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5557 #endif 5558 default: 5559 return 0; 5560 } 5561 } 5562 5563 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5564 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5565 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5566 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5567 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5568 return sm_conn->sm_connection_authorization_state; 5569 } 5570 #endif 5571 5572 #ifdef ENABLE_CLASSIC 5573 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){ 5574 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5575 if (!conn) return GAP_CONNECTION_INVALID; 5576 conn->sniff_min_interval = sniff_min_interval; 5577 conn->sniff_max_interval = sniff_max_interval; 5578 conn->sniff_attempt = sniff_attempt; 5579 conn->sniff_timeout = sniff_timeout; 5580 hci_run(); 5581 return 0; 5582 } 5583 5584 /** 5585 * @brief Exit Sniff mode 5586 * @param con_handle 5587 @ @return 0 if ok 5588 */ 5589 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5590 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5591 if (!conn) return GAP_CONNECTION_INVALID; 5592 conn->sniff_min_interval = 0xffff; 5593 hci_run(); 5594 return 0; 5595 } 5596 #endif 5597 5598 void hci_halting_defer(void){ 5599 if (hci_stack->state != HCI_STATE_HALTING) return; 5600 switch (hci_stack->substate){ 5601 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5602 case HCI_HALTING_CLOSE: 5603 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5604 break; 5605 default: 5606 break; 5607 } 5608 } 5609 5610 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5611 void hci_setup_test_connections_fuzz(void){ 5612 hci_connection_t * conn; 5613 5614 // default address: 66:55:44:33:00:01 5615 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5616 5617 // setup Controller info 5618 hci_stack->num_cmd_packets = 255; 5619 hci_stack->acl_packets_total_num = 255; 5620 5621 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5622 addr[5] = 0x01; 5623 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5624 conn->con_handle = addr[5]; 5625 conn->role = HCI_ROLE_SLAVE; 5626 conn->state = RECEIVED_CONNECTION_REQUEST; 5627 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5628 5629 // setup incoming Classic SCO connection with con handle 0x0002 5630 addr[5] = 0x02; 5631 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5632 conn->con_handle = addr[5]; 5633 conn->role = HCI_ROLE_SLAVE; 5634 conn->state = RECEIVED_CONNECTION_REQUEST; 5635 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5636 5637 // setup ready Classic ACL connection with con handle 0x0003 5638 addr[5] = 0x03; 5639 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5640 conn->con_handle = addr[5]; 5641 conn->role = HCI_ROLE_SLAVE; 5642 conn->state = OPEN; 5643 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5644 5645 // setup ready Classic SCO connection with con handle 0x0004 5646 addr[5] = 0x04; 5647 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5648 conn->con_handle = addr[5]; 5649 conn->role = HCI_ROLE_SLAVE; 5650 conn->state = OPEN; 5651 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5652 5653 // setup ready LE ACL connection with con handle 0x005 and public address 5654 addr[5] = 0x05; 5655 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5656 conn->con_handle = addr[5]; 5657 conn->role = HCI_ROLE_SLAVE; 5658 conn->state = OPEN; 5659 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5660 } 5661 5662 void hci_free_connections_fuzz(void){ 5663 btstack_linked_list_iterator_t it; 5664 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5665 while (btstack_linked_list_iterator_has_next(&it)){ 5666 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5667 btstack_linked_list_iterator_remove(&it); 5668 btstack_memory_hci_connection_free(con); 5669 } 5670 } 5671 void hci_simulate_working_fuzz(void){ 5672 hci_init_done(); 5673 hci_stack->num_cmd_packets = 255; 5674 } 5675 #endif 5676