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 void hci_notify_if_sco_can_send_now(void); 137 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 138 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 139 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 140 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 141 static void hci_connection_timestamp(hci_connection_t *connection); 142 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 143 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 144 #endif 145 146 static int hci_power_control_on(void); 147 static void hci_power_control_off(void); 148 static void hci_state_reset(void); 149 static void hci_emit_transport_packet_sent(void); 150 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 151 static void hci_emit_nr_connections_changed(void); 152 static void hci_emit_hci_open_failed(void); 153 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 154 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 155 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 156 static void hci_run(void); 157 static int hci_is_le_connection(hci_connection_t * connection); 158 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 159 160 #ifdef ENABLE_CLASSIC 161 static int hci_have_usb_transport(void); 162 #endif 163 164 #ifdef ENABLE_BLE 165 #ifdef ENABLE_LE_CENTRAL 166 // called from test/ble_client/advertising_data_parser.c 167 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 168 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 169 static hci_connection_t * gap_get_outgoing_connection(void); 170 #endif 171 #endif 172 173 // the STACK is here 174 #ifndef HAVE_MALLOC 175 static hci_stack_t hci_stack_static; 176 #endif 177 static hci_stack_t * hci_stack = NULL; 178 179 #ifdef ENABLE_CLASSIC 180 // default name 181 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 182 183 // test helper 184 static uint8_t disable_l2cap_timeouts = 0; 185 #endif 186 187 /** 188 * create connection for given address 189 * 190 * @return connection OR NULL, if no memory left 191 */ 192 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 193 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 194 hci_connection_t * conn = btstack_memory_hci_connection_get(); 195 if (!conn) return NULL; 196 bd_addr_copy(conn->address, addr); 197 conn->address_type = addr_type; 198 conn->con_handle = 0xffff; 199 conn->authentication_flags = AUTH_FLAGS_NONE; 200 conn->bonding_flags = 0; 201 conn->requested_security_level = LEVEL_0; 202 #ifdef ENABLE_CLASSIC 203 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 204 btstack_run_loop_set_timer_context(&conn->timeout, conn); 205 hci_connection_timestamp(conn); 206 #endif 207 conn->acl_recombination_length = 0; 208 conn->acl_recombination_pos = 0; 209 conn->num_packets_sent = 0; 210 211 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 212 #ifdef ENABLE_BLE 213 conn->le_phy_update_all_phys = 0xff; 214 #endif 215 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 216 conn->le_max_tx_octets = 27; 217 #endif 218 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 219 return conn; 220 } 221 222 223 /** 224 * get le connection parameter range 225 * 226 * @return le connection parameter range struct 227 */ 228 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 229 *range = hci_stack->le_connection_parameter_range; 230 } 231 232 /** 233 * set le connection parameter range 234 * 235 */ 236 237 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 238 hci_stack->le_connection_parameter_range = *range; 239 } 240 241 /** 242 * @brief Test if connection parameters are inside in existing rage 243 * @param conn_interval_min (unit: 1.25ms) 244 * @param conn_interval_max (unit: 1.25ms) 245 * @param conn_latency 246 * @param supervision_timeout (unit: 10ms) 247 * @returns 1 if included 248 */ 249 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){ 250 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 251 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 252 253 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 254 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 255 256 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 257 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 258 259 return 1; 260 } 261 262 /** 263 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 264 * @note: default: 1 265 * @param max_peripheral_connections 266 */ 267 #ifdef ENABLE_LE_PERIPHERAL 268 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 269 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 270 } 271 #endif 272 273 /** 274 * get hci connections iterator 275 * 276 * @return hci connections iterator 277 */ 278 279 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 280 btstack_linked_list_iterator_init(it, &hci_stack->connections); 281 } 282 283 /** 284 * get connection for a given handle 285 * 286 * @return connection OR NULL, if not found 287 */ 288 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 289 btstack_linked_list_iterator_t it; 290 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 291 while (btstack_linked_list_iterator_has_next(&it)){ 292 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 293 if ( item->con_handle == con_handle ) { 294 return item; 295 } 296 } 297 return NULL; 298 } 299 300 /** 301 * get connection for given address 302 * 303 * @return connection OR NULL, if not found 304 */ 305 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 306 btstack_linked_list_iterator_t it; 307 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 308 while (btstack_linked_list_iterator_has_next(&it)){ 309 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 310 if (connection->address_type != addr_type) continue; 311 if (memcmp(addr, connection->address, 6) != 0) continue; 312 return connection; 313 } 314 return NULL; 315 } 316 317 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 318 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 319 } 320 321 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 322 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 323 } 324 325 #ifdef ENABLE_CLASSIC 326 327 #ifdef ENABLE_SCO_OVER_HCI 328 static int hci_number_sco_connections(void){ 329 int connections = 0; 330 btstack_linked_list_iterator_t it; 331 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 332 while (btstack_linked_list_iterator_has_next(&it)){ 333 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 334 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 335 connections++; 336 } 337 return connections; 338 } 339 #endif 340 341 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 342 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 343 #ifdef HAVE_EMBEDDED_TICK 344 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 345 // connections might be timed out 346 hci_emit_l2cap_check_timeout(connection); 347 } 348 #else 349 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 350 // connections might be timed out 351 hci_emit_l2cap_check_timeout(connection); 352 } 353 #endif 354 } 355 356 static void hci_connection_timestamp(hci_connection_t *connection){ 357 #ifdef HAVE_EMBEDDED_TICK 358 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 359 #else 360 connection->timestamp = btstack_run_loop_get_time_ms(); 361 #endif 362 } 363 364 /** 365 * add authentication flags and reset timer 366 * @note: assumes classic connection 367 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 368 */ 369 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 370 bd_addr_t addr; 371 reverse_bd_addr(bd_addr, addr); 372 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 373 if (conn) { 374 connectionSetAuthenticationFlags(conn, flags); 375 hci_connection_timestamp(conn); 376 } 377 } 378 379 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 380 hci_connection_t * conn = hci_connection_for_handle(handle); 381 if (!conn) return 0; 382 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 383 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 384 return 0; 385 } 386 387 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 388 if (!hci_stack->link_key_db) return; 389 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 390 hci_stack->link_key_db->delete_link_key(addr); 391 } 392 393 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 394 if (!hci_stack->link_key_db) return; 395 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 396 hci_stack->link_key_db->put_link_key(addr, link_key, type); 397 } 398 399 void gap_delete_all_link_keys(void){ 400 bd_addr_t addr; 401 link_key_t link_key; 402 link_key_type_t type; 403 btstack_link_key_iterator_t it; 404 int ok = gap_link_key_iterator_init(&it); 405 if (!ok) { 406 log_error("could not initialize iterator"); 407 return; 408 } 409 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 410 gap_drop_link_key_for_bd_addr(addr); 411 } 412 gap_link_key_iterator_done(&it); 413 } 414 415 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 416 if (!hci_stack->link_key_db) return 0; 417 if (!hci_stack->link_key_db->iterator_init) return 0; 418 return hci_stack->link_key_db->iterator_init(it); 419 } 420 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){ 421 if (!hci_stack->link_key_db) return 0; 422 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 423 } 424 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 425 if (!hci_stack->link_key_db) return; 426 hci_stack->link_key_db->iterator_done(it); 427 } 428 #endif 429 430 static int hci_is_le_connection(hci_connection_t * connection){ 431 switch (connection->address_type){ 432 case BD_ADDR_TYPE_LE_PUBLIC: 433 case BD_ADDR_TYPE_LE_RANDOM: 434 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 435 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 436 return 1; 437 default: 438 return 0; 439 } 440 } 441 442 /** 443 * count connections 444 */ 445 static int nr_hci_connections(void){ 446 int count = 0; 447 btstack_linked_item_t *it; 448 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 449 count++; 450 } 451 return count; 452 } 453 454 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 455 456 unsigned int num_packets_sent_classic = 0; 457 unsigned int num_packets_sent_le = 0; 458 459 btstack_linked_item_t *it; 460 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 461 hci_connection_t * connection = (hci_connection_t *) it; 462 if (hci_is_le_connection(connection)){ 463 num_packets_sent_le += connection->num_packets_sent; 464 } 465 if (connection->address_type == BD_ADDR_TYPE_ACL){ 466 num_packets_sent_classic += connection->num_packets_sent; 467 } 468 } 469 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 470 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 471 int free_slots_le = 0; 472 473 if (free_slots_classic < 0){ 474 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); 475 return 0; 476 } 477 478 if (hci_stack->le_acl_packets_total_num){ 479 // if we have LE slots, they are used 480 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 481 if (free_slots_le < 0){ 482 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); 483 return 0; 484 } 485 } else { 486 // otherwise, classic slots are used for LE, too 487 free_slots_classic -= num_packets_sent_le; 488 if (free_slots_classic < 0){ 489 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); 490 return 0; 491 } 492 } 493 494 switch (address_type){ 495 case BD_ADDR_TYPE_UNKNOWN: 496 log_error("hci_number_free_acl_slots: unknown address type"); 497 return 0; 498 499 case BD_ADDR_TYPE_ACL: 500 return free_slots_classic; 501 502 default: 503 if (hci_stack->le_acl_packets_total_num){ 504 return free_slots_le; 505 } 506 return free_slots_classic; 507 } 508 } 509 510 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 511 // get connection type 512 hci_connection_t * connection = hci_connection_for_handle(con_handle); 513 if (!connection){ 514 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 515 return 0; 516 } 517 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 518 } 519 520 #ifdef ENABLE_CLASSIC 521 static int hci_number_free_sco_slots(void){ 522 unsigned int num_sco_packets_sent = 0; 523 btstack_linked_item_t *it; 524 if (hci_stack->synchronous_flow_control_enabled){ 525 // explicit flow control 526 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 527 hci_connection_t * connection = (hci_connection_t *) it; 528 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 529 num_sco_packets_sent += connection->num_packets_sent; 530 } 531 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 532 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 533 return 0; 534 } 535 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 536 } else { 537 // implicit flow control -- TODO 538 int num_ready = 0; 539 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 540 hci_connection_t * connection = (hci_connection_t *) it; 541 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 542 if (connection->sco_tx_ready == 0) continue; 543 num_ready++; 544 } 545 return num_ready; 546 } 547 } 548 #endif 549 550 // only used to send HCI Host Number Completed Packets 551 static int hci_can_send_comand_packet_transport(void){ 552 if (hci_stack->hci_packet_buffer_reserved) return 0; 553 554 // check for async hci transport implementations 555 if (hci_stack->hci_transport->can_send_packet_now){ 556 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 557 return 0; 558 } 559 } 560 return 1; 561 } 562 563 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 564 int hci_can_send_command_packet_now(void){ 565 if (hci_can_send_comand_packet_transport() == 0) return 0; 566 return hci_stack->num_cmd_packets > 0; 567 } 568 569 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 570 // check for async hci transport implementations 571 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 572 return hci_stack->hci_transport->can_send_packet_now(packet_type); 573 } 574 575 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 576 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 577 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 578 } 579 580 int hci_can_send_acl_le_packet_now(void){ 581 if (hci_stack->hci_packet_buffer_reserved) return 0; 582 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 583 } 584 585 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 586 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 587 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 588 } 589 590 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 591 if (hci_stack->hci_packet_buffer_reserved) return 0; 592 return hci_can_send_prepared_acl_packet_now(con_handle); 593 } 594 595 #ifdef ENABLE_CLASSIC 596 int hci_can_send_acl_classic_packet_now(void){ 597 if (hci_stack->hci_packet_buffer_reserved) return 0; 598 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 599 } 600 601 int hci_can_send_prepared_sco_packet_now(void){ 602 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 603 if (hci_have_usb_transport()){ 604 return hci_stack->sco_can_send_now; 605 } else { 606 return hci_number_free_sco_slots() > 0; 607 } 608 } 609 610 int hci_can_send_sco_packet_now(void){ 611 if (hci_stack->hci_packet_buffer_reserved) return 0; 612 return hci_can_send_prepared_sco_packet_now(); 613 } 614 615 void hci_request_sco_can_send_now_event(void){ 616 hci_stack->sco_waiting_for_can_send_now = 1; 617 hci_notify_if_sco_can_send_now(); 618 } 619 #endif 620 621 // used for internal checks in l2cap.c 622 int hci_is_packet_buffer_reserved(void){ 623 return hci_stack->hci_packet_buffer_reserved; 624 } 625 626 // reserves outgoing packet buffer. @returns 1 if successful 627 int hci_reserve_packet_buffer(void){ 628 if (hci_stack->hci_packet_buffer_reserved) { 629 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 630 return 0; 631 } 632 hci_stack->hci_packet_buffer_reserved = 1; 633 return 1; 634 } 635 636 void hci_release_packet_buffer(void){ 637 hci_stack->hci_packet_buffer_reserved = 0; 638 } 639 640 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 641 static int hci_transport_synchronous(void){ 642 return hci_stack->hci_transport->can_send_packet_now == NULL; 643 } 644 645 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 646 647 // 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); 648 649 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 650 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 651 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0)){ 652 max_acl_data_packet_length = hci_stack->le_data_packets_length; 653 } 654 655 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 656 if (hci_is_le_connection(connection)){ 657 max_acl_data_packet_length = connection->le_max_tx_octets; 658 } 659 #endif 660 661 log_debug("hci_send_acl_packet_fragments entered"); 662 663 int err; 664 // multiple packets could be send on a synchronous HCI transport 665 while (true){ 666 667 log_debug("hci_send_acl_packet_fragments loop entered"); 668 669 // get current data 670 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 671 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 672 int more_fragments = 0; 673 674 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 675 if (current_acl_data_packet_length > max_acl_data_packet_length){ 676 more_fragments = 1; 677 current_acl_data_packet_length = max_acl_data_packet_length; 678 } 679 680 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 681 if (acl_header_pos > 0){ 682 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 683 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 684 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 685 } 686 687 // update header len 688 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 689 690 // count packet 691 connection->num_packets_sent++; 692 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 693 694 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 695 if (more_fragments){ 696 // update start of next fragment to send 697 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 698 } else { 699 // done 700 hci_stack->acl_fragmentation_pos = 0; 701 hci_stack->acl_fragmentation_total_size = 0; 702 } 703 704 // send packet 705 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 706 const int size = current_acl_data_packet_length + 4; 707 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 708 hci_stack->acl_fragmentation_tx_active = 1; 709 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 710 711 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 712 713 // done yet? 714 if (!more_fragments) break; 715 716 // can send more? 717 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 718 } 719 720 log_debug("hci_send_acl_packet_fragments loop over"); 721 722 // release buffer now for synchronous transport 723 if (hci_transport_synchronous()){ 724 hci_stack->acl_fragmentation_tx_active = 0; 725 hci_release_packet_buffer(); 726 hci_emit_transport_packet_sent(); 727 } 728 729 return err; 730 } 731 732 // pre: caller has reserved the packet buffer 733 int hci_send_acl_packet_buffer(int size){ 734 735 // log_info("hci_send_acl_packet_buffer size %u", size); 736 737 if (!hci_stack->hci_packet_buffer_reserved) { 738 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 739 return 0; 740 } 741 742 uint8_t * packet = hci_stack->hci_packet_buffer; 743 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 744 745 // check for free places on Bluetooth module 746 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 747 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 748 hci_release_packet_buffer(); 749 hci_emit_transport_packet_sent(); 750 return BTSTACK_ACL_BUFFERS_FULL; 751 } 752 753 hci_connection_t *connection = hci_connection_for_handle( con_handle); 754 if (!connection) { 755 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 756 hci_release_packet_buffer(); 757 hci_emit_transport_packet_sent(); 758 return 0; 759 } 760 761 #ifdef ENABLE_CLASSIC 762 hci_connection_timestamp(connection); 763 #endif 764 765 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 766 767 // setup data 768 hci_stack->acl_fragmentation_total_size = size; 769 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 770 771 return hci_send_acl_packet_fragments(connection); 772 } 773 774 #ifdef ENABLE_CLASSIC 775 // pre: caller has reserved the packet buffer 776 int hci_send_sco_packet_buffer(int size){ 777 778 // log_info("hci_send_acl_packet_buffer size %u", size); 779 780 if (!hci_stack->hci_packet_buffer_reserved) { 781 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 782 return 0; 783 } 784 785 uint8_t * packet = hci_stack->hci_packet_buffer; 786 787 // skip checks in loopback mode 788 if (!hci_stack->loopback_mode){ 789 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 790 791 // check for free places on Bluetooth module 792 if (!hci_can_send_prepared_sco_packet_now()) { 793 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 794 hci_release_packet_buffer(); 795 hci_emit_transport_packet_sent(); 796 return BTSTACK_ACL_BUFFERS_FULL; 797 } 798 799 // track send packet in connection struct 800 hci_connection_t *connection = hci_connection_for_handle( con_handle); 801 if (!connection) { 802 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 803 hci_release_packet_buffer(); 804 hci_emit_transport_packet_sent(); 805 return 0; 806 } 807 808 if (hci_have_usb_transport()){ 809 // token used 810 hci_stack->sco_can_send_now = 0; 811 } else { 812 if (hci_stack->synchronous_flow_control_enabled){ 813 connection->num_packets_sent++; 814 } else { 815 connection->sco_tx_ready--; 816 } 817 } 818 } 819 820 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 821 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 822 823 if (hci_transport_synchronous()){ 824 hci_release_packet_buffer(); 825 hci_emit_transport_packet_sent(); 826 } 827 828 return err; 829 } 830 #endif 831 832 static void acl_handler(uint8_t *packet, int size){ 833 834 // log_info("acl_handler: size %u", size); 835 836 // get info 837 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 838 hci_connection_t *conn = hci_connection_for_handle(con_handle); 839 uint8_t acl_flags = READ_ACL_FLAGS(packet); 840 uint16_t acl_length = READ_ACL_LENGTH(packet); 841 842 // ignore non-registered handle 843 if (!conn){ 844 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 845 return; 846 } 847 848 // assert packet is complete 849 if ((acl_length + 4) != size){ 850 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 851 return; 852 } 853 854 #ifdef ENABLE_CLASSIC 855 // update idle timestamp 856 hci_connection_timestamp(conn); 857 #endif 858 859 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 860 hci_stack->host_completed_packets = 1; 861 conn->num_packets_completed++; 862 #endif 863 864 // handle different packet types 865 switch (acl_flags & 0x03) { 866 867 case 0x01: // continuation fragment 868 869 // sanity checks 870 if (conn->acl_recombination_pos == 0) { 871 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 872 return; 873 } 874 if ((conn->acl_recombination_pos + acl_length) > (4 + HCI_ACL_BUFFER_SIZE)){ 875 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 876 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 877 conn->acl_recombination_pos = 0; 878 return; 879 } 880 881 // append fragment payload (header already stored) 882 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 883 &packet[4], acl_length); 884 conn->acl_recombination_pos += acl_length; 885 886 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 887 // conn->acl_recombination_pos, conn->acl_recombination_length); 888 889 // forward complete L2CAP packet if complete. 890 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4 + 4)){ // pos already incl. ACL header 891 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 892 // reset recombination buffer 893 conn->acl_recombination_length = 0; 894 conn->acl_recombination_pos = 0; 895 } 896 break; 897 898 case 0x02: { // first fragment 899 900 // sanity check 901 if (conn->acl_recombination_pos) { 902 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 903 conn->acl_recombination_pos = 0; 904 } 905 906 // peek into L2CAP packet! 907 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 908 909 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 910 911 // compare fragment size to L2CAP packet size 912 if (acl_length >= (l2cap_length + 4)){ 913 // forward fragment as L2CAP packet 914 hci_emit_acl_packet(packet, acl_length + 4); 915 } else { 916 917 if (acl_length > HCI_ACL_BUFFER_SIZE){ 918 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 919 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 920 return; 921 } 922 923 // store first fragment and tweak acl length for complete package 924 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 925 packet, acl_length + 4); 926 conn->acl_recombination_pos = acl_length + 4; 927 conn->acl_recombination_length = l2cap_length; 928 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 929 } 930 break; 931 932 } 933 default: 934 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 935 return; 936 } 937 938 // execute main loop 939 hci_run(); 940 } 941 942 static void hci_shutdown_connection(hci_connection_t *conn){ 943 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 944 945 #ifdef ENABLE_CLASSIC 946 #ifdef ENABLE_SCO_OVER_HCI 947 int addr_type = conn->address_type; 948 #endif 949 #endif 950 951 btstack_run_loop_remove_timer(&conn->timeout); 952 953 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 954 btstack_memory_hci_connection_free( conn ); 955 956 // now it's gone 957 hci_emit_nr_connections_changed(); 958 959 #ifdef ENABLE_CLASSIC 960 #ifdef ENABLE_SCO_OVER_HCI 961 // update SCO 962 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 963 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 964 } 965 #endif 966 #endif 967 } 968 969 #ifdef ENABLE_CLASSIC 970 971 static const uint16_t packet_type_sizes[] = { 972 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 973 HCI_ACL_DH1_SIZE, 0, 0, 0, 974 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 975 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 976 }; 977 static const uint8_t packet_type_feature_requirement_bit[] = { 978 0, // 3 slot packets 979 1, // 5 slot packets 980 25, // EDR 2 mpbs 981 26, // EDR 3 mbps 982 39, // 3 slot EDR packts 983 40, // 5 slot EDR packet 984 }; 985 static const uint16_t packet_type_feature_packet_mask[] = { 986 0x0f00, // 3 slot packets 987 0xf000, // 5 slot packets 988 0x1102, // EDR 2 mpbs 989 0x2204, // EDR 3 mbps 990 0x0300, // 3 slot EDR packts 991 0x3000, // 5 slot EDR packet 992 }; 993 994 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 995 // enable packet types based on size 996 uint16_t packet_types = 0; 997 unsigned int i; 998 for (i=0;i<16;i++){ 999 if (packet_type_sizes[i] == 0) continue; 1000 if (packet_type_sizes[i] <= buffer_size){ 1001 packet_types |= 1 << i; 1002 } 1003 } 1004 // disable packet types due to missing local supported features 1005 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1006 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1007 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1008 if (feature_set) continue; 1009 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1010 packet_types &= ~packet_type_feature_packet_mask[i]; 1011 } 1012 // flip bits for "may not be used" 1013 packet_types ^= 0x3306; 1014 return packet_types; 1015 } 1016 1017 uint16_t hci_usable_acl_packet_types(void){ 1018 return hci_stack->packet_types; 1019 } 1020 #endif 1021 1022 uint8_t* hci_get_outgoing_packet_buffer(void){ 1023 // hci packet buffer is >= acl data packet length 1024 return hci_stack->hci_packet_buffer; 1025 } 1026 1027 uint16_t hci_max_acl_data_packet_length(void){ 1028 return hci_stack->acl_data_packet_length; 1029 } 1030 1031 #ifdef ENABLE_CLASSIC 1032 int hci_extended_sco_link_supported(void){ 1033 // No. 31, byte 3, bit 7 1034 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1035 } 1036 #endif 1037 1038 int hci_non_flushable_packet_boundary_flag_supported(void){ 1039 // No. 54, byte 6, bit 6 1040 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1041 } 1042 1043 static int gap_ssp_supported(void){ 1044 // No. 51, byte 6, bit 3 1045 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1046 } 1047 1048 static int hci_classic_supported(void){ 1049 #ifdef ENABLE_CLASSIC 1050 // No. 37, byte 4, bit 5, = No BR/EDR Support 1051 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1052 #else 1053 return 0; 1054 #endif 1055 } 1056 1057 static int hci_le_supported(void){ 1058 #ifdef ENABLE_BLE 1059 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1060 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1061 #else 1062 return 0; 1063 #endif 1064 } 1065 1066 #ifdef ENABLE_BLE 1067 1068 /** 1069 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1070 */ 1071 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1072 *addr_type = hci_stack->le_own_addr_type; 1073 if (hci_stack->le_own_addr_type){ 1074 (void)memcpy(addr, hci_stack->le_random_address, 6); 1075 } else { 1076 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1077 } 1078 } 1079 1080 #ifdef ENABLE_LE_CENTRAL 1081 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1082 1083 int offset = 3; 1084 int num_reports = packet[offset]; 1085 offset += 1; 1086 1087 int i; 1088 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1089 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1090 for (i=0; (i<num_reports) && (offset < size);i++){ 1091 // sanity checks on data_length: 1092 uint8_t data_length = packet[offset + 8]; 1093 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1094 if ((offset + 9 + data_length + 1) > size) return; 1095 // setup event 1096 uint8_t event_size = 10 + data_length; 1097 int pos = 0; 1098 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1099 event[pos++] = event_size; 1100 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1101 offset += 8; 1102 pos += 8; 1103 event[pos++] = packet[offset + 1 + data_length]; // rssi 1104 event[pos++] = data_length; 1105 offset++; 1106 (void)memcpy(&event[pos], &packet[offset], data_length); 1107 pos += data_length; 1108 offset += data_length + 1; // rssi 1109 hci_emit_event(event, pos, 1); 1110 } 1111 } 1112 #endif 1113 #endif 1114 1115 #ifdef ENABLE_BLE 1116 #ifdef ENABLE_LE_PERIPHERAL 1117 static void hci_reenable_advertisements_if_needed(void){ 1118 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1119 // get number of active le slave connections 1120 int num_slave_connections = 0; 1121 btstack_linked_list_iterator_t it; 1122 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1123 while (btstack_linked_list_iterator_has_next(&it)){ 1124 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1125 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1126 if (con->state != OPEN) continue; 1127 if (con->role != HCI_ROLE_SLAVE) continue; 1128 if (!hci_is_le_connection(con)) continue; 1129 num_slave_connections++; 1130 } 1131 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1132 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1133 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1134 } 1135 } 1136 } 1137 #endif 1138 #endif 1139 1140 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1141 1142 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1143 if (!hci_stack->config) return 0; 1144 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1145 // Limit baud rate for Broadcom chipsets to 3 mbps 1146 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1147 baud_rate = 3000000; 1148 } 1149 return baud_rate; 1150 } 1151 1152 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1153 UNUSED(ds); 1154 1155 switch (hci_stack->substate){ 1156 case HCI_INIT_W4_SEND_RESET: 1157 log_info("Resend HCI Reset"); 1158 hci_stack->substate = HCI_INIT_SEND_RESET; 1159 hci_stack->num_cmd_packets = 1; 1160 hci_run(); 1161 break; 1162 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1163 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1164 if (hci_stack->hci_transport->reset_link){ 1165 hci_stack->hci_transport->reset_link(); 1166 } 1167 1168 /* fall through */ 1169 1170 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1171 log_info("Resend HCI Reset - CSR Warm Boot"); 1172 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1173 hci_stack->num_cmd_packets = 1; 1174 hci_run(); 1175 break; 1176 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1177 if (hci_stack->hci_transport->set_baudrate){ 1178 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1179 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1180 hci_stack->hci_transport->set_baudrate(baud_rate); 1181 } 1182 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1183 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1184 if (hci_stack->hci_transport->reset_link){ 1185 log_info("Link Reset"); 1186 hci_stack->hci_transport->reset_link(); 1187 } 1188 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1189 hci_run(); 1190 } 1191 break; 1192 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1193 // otherwise continue 1194 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1195 hci_send_cmd(&hci_read_local_supported_commands); 1196 break; 1197 default: 1198 break; 1199 } 1200 } 1201 #endif 1202 1203 static void hci_initializing_next_state(void){ 1204 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1205 } 1206 1207 // assumption: hci_can_send_command_packet_now() == true 1208 static void hci_initializing_run(void){ 1209 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1210 switch (hci_stack->substate){ 1211 case HCI_INIT_SEND_RESET: 1212 hci_state_reset(); 1213 1214 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1215 // prepare reset if command complete not received in 100ms 1216 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1217 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1218 btstack_run_loop_add_timer(&hci_stack->timeout); 1219 #endif 1220 // send command 1221 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1222 hci_send_cmd(&hci_reset); 1223 break; 1224 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1225 hci_send_cmd(&hci_read_local_version_information); 1226 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1227 break; 1228 case HCI_INIT_SEND_READ_LOCAL_NAME: 1229 hci_send_cmd(&hci_read_local_name); 1230 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1231 break; 1232 1233 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1234 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1235 hci_state_reset(); 1236 // prepare reset if command complete not received in 100ms 1237 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1238 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1239 btstack_run_loop_add_timer(&hci_stack->timeout); 1240 // send command 1241 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1242 hci_send_cmd(&hci_reset); 1243 break; 1244 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1245 hci_state_reset(); 1246 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1247 hci_send_cmd(&hci_reset); 1248 break; 1249 case HCI_INIT_SEND_BAUD_CHANGE: { 1250 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1251 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1252 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1253 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1254 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1255 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1256 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1257 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1258 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1259 btstack_run_loop_add_timer(&hci_stack->timeout); 1260 } 1261 break; 1262 } 1263 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1264 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1265 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1266 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1267 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1268 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1269 break; 1270 } 1271 case HCI_INIT_CUSTOM_INIT: 1272 // Custom initialization 1273 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1274 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1275 int send_cmd = 0; 1276 switch (hci_stack->chipset_result){ 1277 case BTSTACK_CHIPSET_VALID_COMMAND: 1278 send_cmd = 1; 1279 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1280 break; 1281 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1282 send_cmd = 1; 1283 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1284 log_info("CSR Warm Boot"); 1285 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1286 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1287 btstack_run_loop_add_timer(&hci_stack->timeout); 1288 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1289 && hci_stack->config 1290 && hci_stack->chipset 1291 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1292 && hci_stack->hci_transport->set_baudrate 1293 && hci_transport_uart_get_main_baud_rate()){ 1294 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1295 } else { 1296 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1297 } 1298 break; 1299 default: 1300 break; 1301 } 1302 1303 if (send_cmd){ 1304 int size = 3 + hci_stack->hci_packet_buffer[2]; 1305 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1306 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1307 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1308 break; 1309 } 1310 log_info("Init script done"); 1311 1312 // Init script download on Broadcom chipsets causes: 1313 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1314 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1315 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1316 1317 // - baud rate to reset, restore UART baud rate if needed 1318 int need_baud_change = hci_stack->config 1319 && hci_stack->chipset 1320 && hci_stack->chipset->set_baudrate_command 1321 && hci_stack->hci_transport->set_baudrate 1322 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1323 if (need_baud_change) { 1324 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1325 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1326 hci_stack->hci_transport->set_baudrate(baud_rate); 1327 } 1328 1329 uint16_t bcm_delay_ms = 300; 1330 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1331 // -> Work around: wait here. 1332 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1333 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1334 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1335 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1336 btstack_run_loop_add_timer(&hci_stack->timeout); 1337 break; 1338 } 1339 } 1340 // otherwise continue 1341 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1342 hci_send_cmd(&hci_read_local_supported_commands); 1343 break; 1344 case HCI_INIT_SET_BD_ADDR: 1345 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1346 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1347 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1348 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1349 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1350 break; 1351 #endif 1352 1353 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1354 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1355 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1356 hci_send_cmd(&hci_read_local_supported_commands); 1357 break; 1358 case HCI_INIT_READ_BD_ADDR: 1359 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1360 hci_send_cmd(&hci_read_bd_addr); 1361 break; 1362 case HCI_INIT_READ_BUFFER_SIZE: 1363 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1364 hci_send_cmd(&hci_read_buffer_size); 1365 break; 1366 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1367 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1368 hci_send_cmd(&hci_read_local_supported_features); 1369 break; 1370 1371 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1372 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1373 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1374 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1375 break; 1376 case HCI_INIT_HOST_BUFFER_SIZE: 1377 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1378 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1379 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1380 break; 1381 #endif 1382 1383 case HCI_INIT_SET_EVENT_MASK: 1384 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1385 if (hci_le_supported()){ 1386 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1387 } else { 1388 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1389 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1390 } 1391 break; 1392 1393 #ifdef ENABLE_CLASSIC 1394 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1395 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1396 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1397 break; 1398 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1399 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1400 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1401 break; 1402 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1403 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1404 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1405 break; 1406 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1407 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1408 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1409 break; 1410 case HCI_INIT_WRITE_LOCAL_NAME: { 1411 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1412 hci_reserve_packet_buffer(); 1413 uint8_t * packet = hci_stack->hci_packet_buffer; 1414 // construct HCI Command and send 1415 uint16_t opcode = hci_write_local_name.opcode; 1416 hci_stack->last_cmd_opcode = opcode; 1417 packet[0] = opcode & 0xff; 1418 packet[1] = opcode >> 8; 1419 packet[2] = DEVICE_NAME_LEN; 1420 memset(&packet[3], 0, DEVICE_NAME_LEN); 1421 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1422 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1423 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1424 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1425 // expand '00:00:00:00:00:00' in name with bd_addr 1426 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1427 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1428 break; 1429 } 1430 case HCI_INIT_WRITE_EIR_DATA: { 1431 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1432 hci_reserve_packet_buffer(); 1433 uint8_t * packet = hci_stack->hci_packet_buffer; 1434 // construct HCI Command in-place and send 1435 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1436 hci_stack->last_cmd_opcode = opcode; 1437 uint16_t offset = 0; 1438 packet[offset++] = opcode & 0xff; 1439 packet[offset++] = opcode >> 8; 1440 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1441 packet[offset++] = 0; // FEC not required 1442 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1443 if (hci_stack->eir_data){ 1444 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1445 ad_context_t context; 1446 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1447 uint8_t data_type = ad_iterator_get_data_type(&context); 1448 uint8_t size = ad_iterator_get_data_len(&context); 1449 const uint8_t *data = ad_iterator_get_data(&context); 1450 // copy item 1451 packet[offset++] = size + 1; 1452 packet[offset++] = data_type; 1453 memcpy(&packet[offset], data, size); 1454 // update name item 1455 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1456 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1457 } 1458 offset += size; 1459 } 1460 } else { 1461 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1462 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1463 packet[offset++] = bytes_to_copy + 1; 1464 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1465 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1466 // expand '00:00:00:00:00:00' in name with bd_addr 1467 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1468 } 1469 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1470 break; 1471 } 1472 case HCI_INIT_WRITE_INQUIRY_MODE: 1473 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1474 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1475 break; 1476 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1477 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1478 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1479 break; 1480 case HCI_INIT_WRITE_SCAN_ENABLE: 1481 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1482 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1483 break; 1484 // only sent if ENABLE_SCO_OVER_HCI is defined 1485 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1486 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1487 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1488 break; 1489 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1490 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1491 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1492 break; 1493 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1494 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1495 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1496 log_info("BCM: Route SCO data via HCI transport"); 1497 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1498 break; 1499 1500 #endif 1501 #ifdef ENABLE_BLE 1502 // LE INIT 1503 case HCI_INIT_LE_READ_BUFFER_SIZE: 1504 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1505 hci_send_cmd(&hci_le_read_buffer_size); 1506 break; 1507 case HCI_INIT_LE_SET_EVENT_MASK: 1508 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1509 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1510 break; 1511 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1512 // LE Supported Host = 1, Simultaneous Host = 0 1513 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1514 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1515 break; 1516 #endif 1517 1518 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1519 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1520 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1521 hci_send_cmd(&hci_le_read_maximum_data_length); 1522 break; 1523 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1524 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1525 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1526 break; 1527 #endif 1528 1529 #ifdef ENABLE_LE_CENTRAL 1530 case HCI_INIT_READ_WHITE_LIST_SIZE: 1531 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1532 hci_send_cmd(&hci_le_read_white_list_size); 1533 break; 1534 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1535 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1536 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1537 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); 1538 break; 1539 #endif 1540 default: 1541 return; 1542 } 1543 } 1544 1545 static void hci_init_done(void){ 1546 // done. tell the app 1547 log_info("hci_init_done -> HCI_STATE_WORKING"); 1548 hci_stack->state = HCI_STATE_WORKING; 1549 hci_emit_state(); 1550 hci_run(); 1551 } 1552 1553 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1554 bool command_completed = false; 1555 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1556 uint16_t opcode = little_endian_read_16(packet,3); 1557 if (opcode == hci_stack->last_cmd_opcode){ 1558 command_completed = true; 1559 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1560 } else { 1561 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1562 } 1563 } 1564 1565 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1566 uint8_t status = packet[2]; 1567 uint16_t opcode = little_endian_read_16(packet,4); 1568 if (opcode == hci_stack->last_cmd_opcode){ 1569 if (status){ 1570 command_completed = true; 1571 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1572 } else { 1573 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1574 } 1575 } else { 1576 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1577 } 1578 } 1579 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1580 // Vendor == CSR 1581 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1582 // TODO: track actual command 1583 command_completed = true; 1584 } 1585 1586 // Vendor == Toshiba 1587 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1588 // TODO: track actual command 1589 command_completed = true; 1590 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1591 hci_stack->num_cmd_packets = 1; 1592 } 1593 #endif 1594 1595 return command_completed; 1596 } 1597 1598 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1599 1600 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1601 1602 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1603 1604 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1605 1606 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1607 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1608 // 1609 // HCI Reset 1610 // Timeout 100 ms 1611 // HCI Reset 1612 // Command Complete Reset 1613 // HCI Read Local Version Information 1614 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1615 // hang... 1616 // 1617 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1618 if (!command_completed 1619 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1620 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1621 1622 uint16_t opcode = little_endian_read_16(packet,3); 1623 if (opcode == hci_reset.opcode){ 1624 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1625 return; 1626 } 1627 } 1628 1629 // CSR & H5 1630 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1631 if (!command_completed 1632 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1633 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1634 1635 uint16_t opcode = little_endian_read_16(packet,3); 1636 if (opcode == hci_reset.opcode){ 1637 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1638 return; 1639 } 1640 } 1641 1642 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1643 // fix: Correct substate and behave as command below 1644 if (command_completed){ 1645 switch (hci_stack->substate){ 1646 case HCI_INIT_SEND_RESET: 1647 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1648 break; 1649 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1650 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1651 break; 1652 default: 1653 break; 1654 } 1655 } 1656 1657 #endif 1658 1659 if (!command_completed) return; 1660 1661 bool need_baud_change = false; 1662 bool need_addr_change = false; 1663 1664 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1665 need_baud_change = hci_stack->config 1666 && hci_stack->chipset 1667 && hci_stack->chipset->set_baudrate_command 1668 && hci_stack->hci_transport->set_baudrate 1669 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1670 1671 need_addr_change = hci_stack->custom_bd_addr_set 1672 && hci_stack->chipset 1673 && hci_stack->chipset->set_bd_addr_command; 1674 #endif 1675 1676 switch(hci_stack->substate){ 1677 1678 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1679 case HCI_INIT_SEND_RESET: 1680 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1681 // fix: just correct substate and behave as command below 1682 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1683 btstack_run_loop_remove_timer(&hci_stack->timeout); 1684 break; 1685 case HCI_INIT_W4_SEND_RESET: 1686 btstack_run_loop_remove_timer(&hci_stack->timeout); 1687 break; 1688 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1689 log_info("Received local name, need baud change %d", (int) need_baud_change); 1690 if (need_baud_change){ 1691 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1692 return; 1693 } 1694 // skip baud change 1695 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1696 return; 1697 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1698 // for STLC2500D, baud rate change already happened. 1699 // for others, baud rate gets changed now 1700 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1701 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1702 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1703 hci_stack->hci_transport->set_baudrate(baud_rate); 1704 } 1705 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1706 return; 1707 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1708 btstack_run_loop_remove_timer(&hci_stack->timeout); 1709 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1710 return; 1711 case HCI_INIT_W4_CUSTOM_INIT: 1712 // repeat custom init 1713 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1714 return; 1715 #else 1716 case HCI_INIT_W4_SEND_RESET: 1717 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1718 return ; 1719 #endif 1720 1721 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1722 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1723 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1724 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1725 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1726 return; 1727 } 1728 if (need_addr_change){ 1729 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1730 return; 1731 } 1732 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1733 return; 1734 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1735 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1736 if (need_baud_change){ 1737 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1738 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1739 hci_stack->hci_transport->set_baudrate(baud_rate); 1740 } 1741 if (need_addr_change){ 1742 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1743 return; 1744 } 1745 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1746 return; 1747 case HCI_INIT_W4_SET_BD_ADDR: 1748 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1749 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1750 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1751 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1752 return; 1753 } 1754 // skipping st warm boot 1755 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1756 return; 1757 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1758 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1759 return; 1760 #endif 1761 case HCI_INIT_W4_READ_BD_ADDR: 1762 // only read buffer size if supported 1763 if (hci_stack->local_supported_commands[0] & 0x01) { 1764 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1765 return; 1766 } 1767 // skipping read buffer size 1768 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1769 return; 1770 case HCI_INIT_W4_SET_EVENT_MASK: 1771 // skip Classic init commands for LE only chipsets 1772 if (!hci_classic_supported()){ 1773 #ifdef ENABLE_BLE 1774 if (hci_le_supported()){ 1775 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1776 return; 1777 } 1778 #endif 1779 log_error("Neither BR/EDR nor LE supported"); 1780 hci_init_done(); 1781 return; 1782 } 1783 if (!gap_ssp_supported()){ 1784 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1785 return; 1786 } 1787 break; 1788 #ifdef ENABLE_BLE 1789 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1790 // skip write le host if not supported (e.g. on LE only EM9301) 1791 if (hci_stack->local_supported_commands[0] & 0x02) break; 1792 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1793 return; 1794 1795 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1796 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1797 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1798 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1799 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1800 return; 1801 } 1802 // explicit fall through to reduce repetitions 1803 1804 #ifdef ENABLE_LE_CENTRAL 1805 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1806 #else 1807 hci_init_done(); 1808 #endif 1809 return; 1810 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1811 1812 #endif /* ENABLE_BLE */ 1813 1814 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1815 // skip write secure connections host support if not supported or disabled 1816 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1] & 0x02) == 0) { 1817 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1818 return; 1819 } 1820 break; 1821 1822 #ifdef ENABLE_SCO_OVER_HCI 1823 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1824 // skip write synchronous flow control if not supported 1825 if (hci_stack->local_supported_commands[0] & 0x04) break; 1826 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1827 1828 /* fall through */ 1829 1830 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1831 // skip write default erroneous data reporting if not supported 1832 if (hci_stack->local_supported_commands[0] & 0x08) break; 1833 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1834 1835 /* fall through */ 1836 1837 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1838 // skip bcm set sco pcm config on non-Broadcom chipsets 1839 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1840 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1841 1842 /* fall through */ 1843 1844 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1845 if (!hci_le_supported()){ 1846 // SKIP LE init for Classic only configuration 1847 hci_init_done(); 1848 return; 1849 } 1850 break; 1851 1852 #else /* !ENABLE_SCO_OVER_HCI */ 1853 1854 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1855 #ifdef ENABLE_BLE 1856 if (hci_le_supported()){ 1857 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1858 return; 1859 } 1860 #endif 1861 // SKIP LE init for Classic only configuration 1862 hci_init_done(); 1863 return; 1864 #endif /* ENABLE_SCO_OVER_HCI */ 1865 1866 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1867 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1868 // Response to command before init done state -> init done 1869 case (HCI_INIT_DONE-1): 1870 hci_init_done(); 1871 return; 1872 #endif 1873 1874 default: 1875 break; 1876 } 1877 hci_initializing_next_state(); 1878 } 1879 1880 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1881 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1882 bd_addr_t bd_address; 1883 (void)memcpy(&bd_address, conn->address, 6); 1884 1885 #ifdef ENABLE_CLASSIC 1886 // cache needed data 1887 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1888 #endif 1889 1890 // connection failed, remove entry 1891 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1892 btstack_memory_hci_connection_free( conn ); 1893 1894 #ifdef ENABLE_CLASSIC 1895 // notify client if dedicated bonding 1896 if (notify_dedicated_bonding_failed){ 1897 log_info("hci notify_dedicated_bonding_failed"); 1898 hci_emit_dedicated_bonding_result(bd_address, status); 1899 } 1900 1901 // if authentication error, also delete link key 1902 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1903 gap_drop_link_key_for_bd_addr(bd_address); 1904 } 1905 #endif 1906 } 1907 1908 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1909 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1910 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1911 if (conn->bonding_flags & BONDING_DEDICATED){ 1912 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1913 } 1914 } 1915 1916 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1917 // handle BT initialization 1918 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1919 hci_initializing_event_handler(packet, size); 1920 } 1921 1922 // help with BT sleep 1923 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1924 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1925 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1926 hci_initializing_next_state(); 1927 } 1928 } 1929 1930 static void event_handler(uint8_t *packet, int size){ 1931 1932 uint16_t event_length = packet[1]; 1933 1934 // assert packet is complete 1935 if (size != (event_length + 2)){ 1936 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1937 return; 1938 } 1939 1940 bd_addr_t addr; 1941 bd_addr_type_t addr_type; 1942 hci_con_handle_t handle; 1943 hci_connection_t * conn; 1944 int i; 1945 int create_connection_cmd; 1946 1947 #ifdef ENABLE_CLASSIC 1948 uint8_t link_type; 1949 #endif 1950 1951 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1952 1953 switch (hci_event_packet_get_type(packet)) { 1954 1955 case HCI_EVENT_COMMAND_COMPLETE: 1956 // get num cmd packets - limit to 1 to reduce complexity 1957 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1958 1959 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1960 if (packet[5]) break; 1961 // terminate, name 248 chars 1962 packet[6+248] = 0; 1963 log_info("local name: %s", &packet[6]); 1964 } 1965 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1966 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1967 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1968 uint16_t acl_len = little_endian_read_16(packet, 6); 1969 uint16_t sco_len = packet[8]; 1970 1971 // determine usable ACL/SCO payload size 1972 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1973 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1974 1975 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1976 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1977 1978 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1979 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1980 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1981 } 1982 } 1983 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 1984 if (packet[5] == 0){ 1985 uint8_t event[5]; 1986 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 1987 event[1] = 3; 1988 (void)memcpy(&event[2], &packet[6], 3); 1989 hci_emit_event(event, sizeof(event), 1); 1990 } 1991 } 1992 #ifdef ENABLE_BLE 1993 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1994 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1995 hci_stack->le_acl_packets_total_num = packet[8]; 1996 // determine usable ACL payload size 1997 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1998 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1999 } 2000 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2001 } 2002 #endif 2003 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2004 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 2005 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2006 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2007 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); 2008 } 2009 #endif 2010 #ifdef ENABLE_LE_CENTRAL 2011 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 2012 hci_stack->le_whitelist_capacity = packet[6]; 2013 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2014 } 2015 #endif 2016 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 2017 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2018 hci_stack->local_bd_addr); 2019 log_info("Local Address, Status: 0x%02x: Addr: %s", 2020 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2021 #ifdef ENABLE_CLASSIC 2022 if (hci_stack->link_key_db){ 2023 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2024 } 2025 #endif 2026 } 2027 #ifdef ENABLE_CLASSIC 2028 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2029 hci_emit_discoverable_enabled(hci_stack->discoverable); 2030 } 2031 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 2032 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2033 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2034 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2035 hci_emit_event(event, sizeof(event), 1); 2036 } 2037 } 2038 #endif 2039 2040 // Note: HCI init checks 2041 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 2042 (void)memcpy(hci_stack->local_supported_features, 2043 &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2044 8); 2045 2046 #ifdef ENABLE_CLASSIC 2047 // determine usable ACL packet types based on host buffer size and supported features 2048 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2049 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2050 #endif 2051 // Classic/LE 2052 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2053 } 2054 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 2055 // hci_stack->hci_version = little_endian_read_16(packet, 4); 2056 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 2057 uint16_t manufacturer = little_endian_read_16(packet, 10); 2058 // map Cypress to Broadcom 2059 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2060 log_info("Treat Cypress as Broadcom"); 2061 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2062 little_endian_store_16(packet, 10, manufacturer); 2063 } 2064 hci_stack->manufacturer = manufacturer; 2065 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 2066 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 2067 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2068 } 2069 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2070 hci_stack->local_supported_commands[0] = 2071 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2072 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2073 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2074 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2075 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2076 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2077 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2078 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+20] & 0x10) << 3); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2079 hci_stack->local_supported_commands[1] = 2080 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+ 2] & 0x40) >> 6) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2081 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+32] & 0x08) >> 2); // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2082 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2083 } 2084 #ifdef ENABLE_CLASSIC 2085 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2086 if (packet[5] == 0){ 2087 hci_stack->synchronous_flow_control_enabled = 1; 2088 } 2089 } 2090 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2091 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2092 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2093 conn = hci_connection_for_handle(handle); 2094 if (!conn) break; 2095 if (status == 0){ 2096 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2097 log_info("Handle %x04x key Size: %u", handle, key_size); 2098 conn->encryption_key_size = key_size; 2099 } else { 2100 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2101 conn->encryption_key_size = 1; 2102 } 2103 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2104 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2105 } 2106 #endif 2107 break; 2108 2109 case HCI_EVENT_COMMAND_STATUS: 2110 // get num cmd packets - limit to 1 to reduce complexity 2111 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2112 2113 // check command status to detected failed outgoing connections 2114 create_connection_cmd = 0; 2115 #ifdef ENABLE_CLASSIC 2116 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2117 create_connection_cmd = 1; 2118 } 2119 #endif 2120 #ifdef ENABLE_LE_CENTRAL 2121 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2122 create_connection_cmd = 1; 2123 } 2124 #endif 2125 if (create_connection_cmd) { 2126 uint8_t status = hci_event_command_status_get_status(packet); 2127 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2128 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); 2129 2130 // reset outgoing address info 2131 memset(hci_stack->outgoing_addr, 0, 6); 2132 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2133 2134 // error => outgoing connection failed 2135 if ((conn != NULL) && (status != 0)){ 2136 hci_handle_connection_failed(conn, status); 2137 } 2138 } 2139 break; 2140 2141 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2142 if (size < 3) return; 2143 uint16_t num_handles = packet[2]; 2144 if (size != (3 + num_handles * 4)) return; 2145 uint16_t offset = 3; 2146 for (i=0; i<num_handles;i++){ 2147 handle = little_endian_read_16(packet, offset) & 0x0fff; 2148 offset += 2; 2149 uint16_t num_packets = little_endian_read_16(packet, offset); 2150 offset += 2; 2151 2152 conn = hci_connection_for_handle(handle); 2153 if (!conn){ 2154 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2155 continue; 2156 } 2157 2158 if (conn->num_packets_sent >= num_packets){ 2159 conn->num_packets_sent -= num_packets; 2160 } else { 2161 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2162 conn->num_packets_sent = 0; 2163 } 2164 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2165 2166 #ifdef ENABLE_CLASSIC 2167 // For SCO, we do the can_send_now_check here 2168 hci_notify_if_sco_can_send_now(); 2169 #endif 2170 } 2171 break; 2172 } 2173 2174 #ifdef ENABLE_CLASSIC 2175 case HCI_EVENT_INQUIRY_COMPLETE: 2176 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2177 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2178 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2179 hci_emit_event(event, sizeof(event), 1); 2180 } 2181 break; 2182 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2183 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2184 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2185 } 2186 break; 2187 case HCI_EVENT_CONNECTION_REQUEST: 2188 reverse_bd_addr(&packet[2], addr); 2189 if (hci_stack->gap_classic_accept_callback != NULL){ 2190 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2191 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2192 bd_addr_copy(hci_stack->decline_addr, addr); 2193 break; 2194 } 2195 } 2196 2197 // TODO: eval COD 8-10 2198 link_type = packet[11]; 2199 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2200 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2201 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2202 if (!conn) { 2203 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2204 } 2205 if (!conn) { 2206 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2207 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2208 bd_addr_copy(hci_stack->decline_addr, addr); 2209 break; 2210 } 2211 conn->role = HCI_ROLE_SLAVE; 2212 conn->state = RECEIVED_CONNECTION_REQUEST; 2213 // store info about eSCO 2214 if (link_type == 0x02){ 2215 conn->remote_supported_features[0] |= 1; 2216 } 2217 hci_run(); 2218 break; 2219 2220 case HCI_EVENT_CONNECTION_COMPLETE: 2221 // Connection management 2222 reverse_bd_addr(&packet[5], addr); 2223 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2224 addr_type = BD_ADDR_TYPE_ACL; 2225 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2226 if (conn) { 2227 if (!packet[2]){ 2228 conn->state = OPEN; 2229 conn->con_handle = little_endian_read_16(packet, 3); 2230 2231 // queue get remote feature 2232 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2233 2234 // queue set supervision timeout if we're master 2235 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2236 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2237 } 2238 2239 // restart timer 2240 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2241 btstack_run_loop_add_timer(&conn->timeout); 2242 2243 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2244 2245 hci_emit_nr_connections_changed(); 2246 } else { 2247 // connection failed 2248 hci_handle_connection_failed(conn, packet[2]); 2249 } 2250 } 2251 break; 2252 2253 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2254 reverse_bd_addr(&packet[5], addr); 2255 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2256 if (packet[2]){ 2257 // connection failed 2258 break; 2259 } 2260 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2261 if (!conn) { 2262 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2263 } 2264 if (!conn) { 2265 break; 2266 } 2267 conn->state = OPEN; 2268 conn->con_handle = little_endian_read_16(packet, 3); 2269 2270 #ifdef ENABLE_SCO_OVER_HCI 2271 // update SCO 2272 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2273 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2274 } 2275 // trigger can send now 2276 if (hci_have_usb_transport()){ 2277 hci_stack->sco_can_send_now = 1; 2278 } 2279 #endif 2280 break; 2281 2282 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2283 handle = little_endian_read_16(packet, 3); 2284 conn = hci_connection_for_handle(handle); 2285 if (!conn) break; 2286 if (!packet[2]){ 2287 uint8_t * features = &packet[5]; 2288 // SSP Controller 2289 if (features[6] & (1 << 3)){ 2290 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2291 } 2292 // eSCO 2293 if (features[3] & (1<<7)){ 2294 conn->remote_supported_features[0] |= 1; 2295 } 2296 // Extended features 2297 if (features[7] & (1<<7)){ 2298 conn->remote_supported_features[0] |= 2; 2299 } 2300 // read extended features if possible 2301 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2302 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2303 break; 2304 } 2305 } 2306 hci_handle_remote_features_received(conn); 2307 break; 2308 2309 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2310 handle = little_endian_read_16(packet, 3); 2311 conn = hci_connection_for_handle(handle); 2312 if (!conn) break; 2313 // status = ok, page = 1 2314 if (!packet[2] && packet[5] == 1){ 2315 const uint8_t * features = &packet[7]; 2316 // SSP Host 2317 if (features[0] & (1 << 0)){ 2318 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2319 } 2320 } 2321 hci_handle_remote_features_received(conn); 2322 break; 2323 2324 case HCI_EVENT_LINK_KEY_REQUEST: 2325 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2326 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2327 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2328 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2329 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2330 hci_run(); 2331 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2332 return; 2333 2334 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2335 reverse_bd_addr(&packet[2], addr); 2336 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2337 if (!conn) break; 2338 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2339 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2340 // Change Connection Encryption keeps link key type 2341 if (link_key_type != CHANGED_COMBINATION_KEY){ 2342 conn->link_key_type = link_key_type; 2343 } 2344 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2345 // still forward event to allow dismiss of pairing dialog 2346 break; 2347 } 2348 2349 case HCI_EVENT_PIN_CODE_REQUEST: 2350 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2351 // non-bondable mode: pin code negative reply will be sent 2352 if (!hci_stack->bondable){ 2353 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2354 hci_run(); 2355 return; 2356 } 2357 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2358 if (!hci_stack->link_key_db) break; 2359 hci_event_pin_code_request_get_bd_addr(packet, addr); 2360 hci_stack->link_key_db->delete_link_key(addr); 2361 break; 2362 2363 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2364 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2365 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2366 break; 2367 2368 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2369 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2370 if (!hci_stack->ssp_auto_accept) break; 2371 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2372 break; 2373 2374 case HCI_EVENT_USER_PASSKEY_REQUEST: 2375 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2376 if (!hci_stack->ssp_auto_accept) break; 2377 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2378 break; 2379 case HCI_EVENT_MODE_CHANGE: 2380 handle = hci_event_mode_change_get_handle(packet); 2381 conn = hci_connection_for_handle(handle); 2382 if (!conn) break; 2383 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2384 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2385 break; 2386 #endif 2387 2388 case HCI_EVENT_ENCRYPTION_CHANGE: 2389 handle = hci_event_encryption_change_get_connection_handle(packet); 2390 conn = hci_connection_for_handle(handle); 2391 if (!conn) break; 2392 if (hci_event_encryption_change_get_status(packet) == 0) { 2393 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2394 if (encryption_enabled){ 2395 if (hci_is_le_connection(conn)){ 2396 // For LE, we accept connection as encrypted 2397 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2398 } 2399 #ifdef ENABLE_CLASSIC 2400 else { 2401 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2402 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2403 bool connected_uses_aes_ccm = encryption_enabled == 2; 2404 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2405 log_info("SC during pairing, but only E0 now -> abort"); 2406 conn->state = conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2407 break; 2408 } 2409 2410 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2411 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2412 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2413 } else { 2414 // if not, pretend everything is perfect 2415 conn->encryption_key_size = 16; 2416 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2417 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2418 } 2419 } 2420 #endif 2421 } else { 2422 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2423 } 2424 } 2425 2426 break; 2427 2428 #ifdef ENABLE_CLASSIC 2429 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2430 handle = little_endian_read_16(packet, 3); 2431 conn = hci_connection_for_handle(handle); 2432 if (!conn) break; 2433 2434 // dedicated bonding: send result and disconnect 2435 if (conn->bonding_flags & BONDING_DEDICATED){ 2436 conn->bonding_flags &= ~BONDING_DEDICATED; 2437 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2438 conn->bonding_status = packet[2]; 2439 break; 2440 } 2441 2442 if ((packet[2] == 0) && (gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)){ 2443 // link key sufficient for requested security 2444 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2445 break; 2446 } 2447 // not enough 2448 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2449 break; 2450 #endif 2451 2452 // HCI_EVENT_DISCONNECTION_COMPLETE 2453 // has been split, to first notify stack before shutting connection down 2454 // see end of function, too. 2455 case HCI_EVENT_DISCONNECTION_COMPLETE: 2456 if (packet[2]) break; // status != 0 2457 handle = little_endian_read_16(packet, 3); 2458 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2459 if (hci_stack->acl_fragmentation_total_size > 0) { 2460 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2461 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2462 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2463 hci_stack->acl_fragmentation_total_size = 0; 2464 hci_stack->acl_fragmentation_pos = 0; 2465 if (release_buffer){ 2466 hci_release_packet_buffer(); 2467 } 2468 } 2469 } 2470 2471 conn = hci_connection_for_handle(handle); 2472 if (!conn) break; 2473 // mark connection for shutdown 2474 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2475 2476 // emit dedicatd bonding event 2477 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2478 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2479 } 2480 2481 #ifdef ENABLE_BLE 2482 #ifdef ENABLE_LE_PERIPHERAL 2483 // re-enable advertisements for le connections if active 2484 if (hci_is_le_connection(conn)){ 2485 hci_reenable_advertisements_if_needed(); 2486 } 2487 #endif 2488 #endif 2489 break; 2490 2491 case HCI_EVENT_HARDWARE_ERROR: 2492 log_error("Hardware Error: 0x%02x", packet[2]); 2493 if (hci_stack->hardware_error_callback){ 2494 (*hci_stack->hardware_error_callback)(packet[2]); 2495 } else { 2496 // if no special requests, just reboot stack 2497 hci_power_control_off(); 2498 hci_power_control_on(); 2499 } 2500 break; 2501 2502 #ifdef ENABLE_CLASSIC 2503 case HCI_EVENT_ROLE_CHANGE: 2504 if (packet[2]) break; // status != 0 2505 reverse_bd_addr(&packet[3], addr); 2506 addr_type = BD_ADDR_TYPE_ACL; 2507 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2508 if (!conn) break; 2509 conn->role = packet[9]; 2510 break; 2511 #endif 2512 2513 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2514 // release packet buffer only for asynchronous transport and if there are not further fragements 2515 if (hci_transport_synchronous()) { 2516 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2517 return; // instead of break: to avoid re-entering hci_run() 2518 } 2519 hci_stack->acl_fragmentation_tx_active = 0; 2520 if (hci_stack->acl_fragmentation_total_size) break; 2521 hci_release_packet_buffer(); 2522 2523 // L2CAP receives this event via the hci_emit_event below 2524 2525 #ifdef ENABLE_CLASSIC 2526 // For SCO, we do the can_send_now_check here 2527 hci_notify_if_sco_can_send_now(); 2528 #endif 2529 break; 2530 2531 #ifdef ENABLE_CLASSIC 2532 case HCI_EVENT_SCO_CAN_SEND_NOW: 2533 // For SCO, we do the can_send_now_check here 2534 hci_stack->sco_can_send_now = 1; 2535 hci_notify_if_sco_can_send_now(); 2536 return; 2537 2538 // explode inquriy results for easier consumption 2539 case HCI_EVENT_INQUIRY_RESULT: 2540 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2541 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2542 gap_inquiry_explode(packet, size); 2543 break; 2544 #endif 2545 2546 #ifdef ENABLE_BLE 2547 case HCI_EVENT_LE_META: 2548 switch (packet[2]){ 2549 #ifdef ENABLE_LE_CENTRAL 2550 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2551 // log_info("advertising report received"); 2552 if (!hci_stack->le_scanning_enabled) break; 2553 le_handle_advertisement_report(packet, size); 2554 break; 2555 #endif 2556 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2557 // Connection management 2558 reverse_bd_addr(&packet[8], addr); 2559 addr_type = (bd_addr_type_t)packet[7]; 2560 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2561 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2562 2563 #ifdef ENABLE_LE_CENTRAL 2564 // if auto-connect, remove from whitelist in both roles 2565 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2566 hci_remove_from_whitelist(addr_type, addr); 2567 } 2568 // handle error: error is reported only to the initiator -> outgoing connection 2569 if (packet[3]){ 2570 2571 // handle cancelled outgoing connection 2572 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2573 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2574 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2575 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2576 conn = gap_get_outgoing_connection(); 2577 } 2578 2579 // outgoing connection establishment is done 2580 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2581 // remove entry 2582 if (conn){ 2583 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2584 btstack_memory_hci_connection_free( conn ); 2585 } 2586 break; 2587 } 2588 #endif 2589 // on success, both hosts receive connection complete event 2590 if (packet[6] == HCI_ROLE_MASTER){ 2591 #ifdef ENABLE_LE_CENTRAL 2592 // if we're master, it was an outgoing connection and we're done with it 2593 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2594 #endif 2595 } else { 2596 #ifdef ENABLE_LE_PERIPHERAL 2597 // if we're slave, it was an incoming connection, advertisements have stopped 2598 hci_stack->le_advertisements_active = 0; 2599 #endif 2600 } 2601 // LE connections are auto-accepted, so just create a connection if there isn't one already 2602 if (!conn){ 2603 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2604 } 2605 // no memory, sorry. 2606 if (!conn){ 2607 break; 2608 } 2609 2610 conn->state = OPEN; 2611 conn->role = packet[6]; 2612 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2613 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2614 2615 #ifdef ENABLE_LE_PERIPHERAL 2616 if (packet[6] == HCI_ROLE_SLAVE){ 2617 hci_reenable_advertisements_if_needed(); 2618 } 2619 #endif 2620 2621 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2622 2623 // restart timer 2624 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2625 // btstack_run_loop_add_timer(&conn->timeout); 2626 2627 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2628 2629 hci_emit_nr_connections_changed(); 2630 break; 2631 2632 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2633 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2634 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2635 conn = hci_connection_for_handle(handle); 2636 if (!conn) break; 2637 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2638 break; 2639 2640 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2641 // connection 2642 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2643 conn = hci_connection_for_handle(handle); 2644 if (conn) { 2645 // read arguments 2646 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2647 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2648 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2649 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2650 2651 // validate against current connection parameter range 2652 le_connection_parameter_range_t existing_range; 2653 gap_get_connection_parameter_range(&existing_range); 2654 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2655 if (update_parameter){ 2656 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2657 conn->le_conn_interval_min = le_conn_interval_min; 2658 conn->le_conn_interval_max = le_conn_interval_max; 2659 conn->le_conn_latency = le_conn_latency; 2660 conn->le_supervision_timeout = le_supervision_timeout; 2661 } else { 2662 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2663 } 2664 } 2665 break; 2666 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2667 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2668 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2669 conn = hci_connection_for_handle(handle); 2670 if (conn) { 2671 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2672 } 2673 break; 2674 #endif 2675 default: 2676 break; 2677 } 2678 break; 2679 #endif 2680 case HCI_EVENT_VENDOR_SPECIFIC: 2681 // Vendor specific commands often create vendor specific event instead of num completed packets 2682 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2683 switch (hci_stack->manufacturer){ 2684 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2685 hci_stack->num_cmd_packets = 1; 2686 break; 2687 default: 2688 break; 2689 } 2690 break; 2691 default: 2692 break; 2693 } 2694 2695 handle_event_for_current_stack_state(packet, size); 2696 2697 // notify upper stack 2698 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2699 2700 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2701 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2702 if (!packet[2]){ 2703 handle = little_endian_read_16(packet, 3); 2704 hci_connection_t * aConn = hci_connection_for_handle(handle); 2705 if (aConn) { 2706 // discard connection if app did not trigger a reconnect in the event handler 2707 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2708 hci_shutdown_connection(aConn); 2709 } 2710 } 2711 } 2712 } 2713 2714 // execute main loop 2715 hci_run(); 2716 } 2717 2718 #ifdef ENABLE_CLASSIC 2719 2720 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2721 static void sco_schedule_tx(hci_connection_t * conn); 2722 2723 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2724 log_debug("SCO TX Timeout"); 2725 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2726 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2727 if (!conn) return; 2728 2729 // trigger send 2730 conn->sco_tx_ready = 1; 2731 // extra packet if CVSD but SCO buffer is too short 2732 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2733 conn->sco_tx_ready++; 2734 } 2735 hci_notify_if_sco_can_send_now(); 2736 } 2737 2738 2739 #define SCO_TX_AFTER_RX_MS (6) 2740 2741 static void sco_schedule_tx(hci_connection_t * conn){ 2742 2743 uint32_t now = btstack_run_loop_get_time_ms(); 2744 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2745 int time_delta_ms = sco_tx_ms - now; 2746 2747 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2748 2749 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2750 btstack_run_loop_set_timer(timer, time_delta_ms); 2751 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2752 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2753 btstack_run_loop_add_timer(timer); 2754 } 2755 2756 static void sco_handler(uint8_t * packet, uint16_t size){ 2757 // lookup connection struct 2758 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2759 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2760 if (!conn) return; 2761 2762 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2763 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2764 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2765 packet[2] = 0x3c; 2766 memmove(&packet[3], &packet[23], 63); 2767 size = 63; 2768 } 2769 } 2770 2771 if (hci_have_usb_transport()){ 2772 // Nothing to do 2773 } else { 2774 // 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); 2775 if (hci_stack->synchronous_flow_control_enabled == 0){ 2776 uint32_t now = btstack_run_loop_get_time_ms(); 2777 2778 if (!conn->sco_rx_valid){ 2779 // ignore first 10 packets 2780 conn->sco_rx_count++; 2781 // log_debug("sco rx count %u", conn->sco_rx_count); 2782 if (conn->sco_rx_count == 10) { 2783 // use first timestamp as is and pretent it just started 2784 conn->sco_rx_ms = now; 2785 conn->sco_rx_valid = 1; 2786 conn->sco_rx_count = 0; 2787 sco_schedule_tx(conn); 2788 } 2789 } else { 2790 // track expected arrival timme 2791 conn->sco_rx_count++; 2792 conn->sco_rx_ms += 7; 2793 int delta = (int32_t) (now - conn->sco_rx_ms); 2794 if (delta > 0){ 2795 conn->sco_rx_ms++; 2796 } 2797 // log_debug("sco rx %u", conn->sco_rx_ms); 2798 sco_schedule_tx(conn); 2799 } 2800 } 2801 } 2802 // deliver to app 2803 if (hci_stack->sco_packet_handler) { 2804 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2805 } 2806 2807 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2808 conn->num_packets_completed++; 2809 hci_stack->host_completed_packets = 1; 2810 hci_run(); 2811 #endif 2812 } 2813 #endif 2814 2815 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2816 hci_dump_packet(packet_type, 1, packet, size); 2817 switch (packet_type) { 2818 case HCI_EVENT_PACKET: 2819 event_handler(packet, size); 2820 break; 2821 case HCI_ACL_DATA_PACKET: 2822 acl_handler(packet, size); 2823 break; 2824 #ifdef ENABLE_CLASSIC 2825 case HCI_SCO_DATA_PACKET: 2826 sco_handler(packet, size); 2827 break; 2828 #endif 2829 default: 2830 break; 2831 } 2832 } 2833 2834 /** 2835 * @brief Add event packet handler. 2836 */ 2837 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2838 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2839 } 2840 2841 2842 /** Register HCI packet handlers */ 2843 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2844 hci_stack->acl_packet_handler = handler; 2845 } 2846 2847 #ifdef ENABLE_CLASSIC 2848 /** 2849 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2850 */ 2851 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2852 hci_stack->sco_packet_handler = handler; 2853 } 2854 #endif 2855 2856 static void hci_state_reset(void){ 2857 // no connections yet 2858 hci_stack->connections = NULL; 2859 2860 // keep discoverable/connectable as this has been requested by the client(s) 2861 // hci_stack->discoverable = 0; 2862 // hci_stack->connectable = 0; 2863 // hci_stack->bondable = 1; 2864 // hci_stack->own_addr_type = 0; 2865 2866 // buffer is free 2867 hci_stack->hci_packet_buffer_reserved = 0; 2868 2869 // no pending cmds 2870 hci_stack->decline_reason = 0; 2871 hci_stack->new_scan_enable_value = 0xff; 2872 2873 // LE 2874 #ifdef ENABLE_BLE 2875 memset(hci_stack->le_random_address, 0, 6); 2876 hci_stack->le_random_address_set = 0; 2877 #endif 2878 #ifdef ENABLE_LE_CENTRAL 2879 hci_stack->le_scanning_active = 0; 2880 hci_stack->le_scan_type = 0xff; 2881 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2882 hci_stack->le_whitelist = 0; 2883 hci_stack->le_whitelist_capacity = 0; 2884 #endif 2885 } 2886 2887 #ifdef ENABLE_CLASSIC 2888 /** 2889 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2890 */ 2891 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2892 // store and open remote device db 2893 hci_stack->link_key_db = link_key_db; 2894 if (hci_stack->link_key_db) { 2895 hci_stack->link_key_db->open(); 2896 } 2897 } 2898 #endif 2899 2900 void hci_init(const hci_transport_t *transport, const void *config){ 2901 2902 #ifdef HAVE_MALLOC 2903 if (!hci_stack) { 2904 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2905 } 2906 #else 2907 hci_stack = &hci_stack_static; 2908 #endif 2909 memset(hci_stack, 0, sizeof(hci_stack_t)); 2910 2911 // reference to use transport layer implementation 2912 hci_stack->hci_transport = transport; 2913 2914 // reference to used config 2915 hci_stack->config = config; 2916 2917 // setup pointer for outgoing packet buffer 2918 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2919 2920 // max acl payload size defined in config.h 2921 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2922 2923 // register packet handlers with transport 2924 transport->register_packet_handler(&packet_handler); 2925 2926 hci_stack->state = HCI_STATE_OFF; 2927 2928 // class of device 2929 hci_stack->class_of_device = 0x007a020c; // Smartphone 2930 2931 // bondable by default 2932 hci_stack->bondable = 1; 2933 2934 #ifdef ENABLE_CLASSIC 2935 // classic name 2936 hci_stack->local_name = default_classic_name; 2937 2938 // Master slave policy 2939 hci_stack->master_slave_policy = 1; 2940 2941 // Allow Role Switch 2942 hci_stack->allow_role_switch = 1; 2943 2944 // Default / minimum security level = 2 2945 hci_stack->gap_security_level = LEVEL_2; 2946 2947 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2948 hci_stack->gap_required_encyrption_key_size = 16; 2949 #endif 2950 2951 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2952 hci_stack->ssp_enable = 1; 2953 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2954 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2955 hci_stack->ssp_auto_accept = 1; 2956 2957 // Secure Connections: enable (requires support from Controller) 2958 hci_stack->secure_connections_enable = true; 2959 2960 // voice setting - signed 16 bit pcm data with CVSD over the air 2961 hci_stack->sco_voice_setting = 0x60; 2962 2963 #ifdef ENABLE_LE_CENTRAL 2964 // connection parameter to use for outgoing connections 2965 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2966 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2967 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2968 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2969 hci_stack->le_connection_latency = 4; // 4 2970 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2971 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2972 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2973 2974 // default LE Scanning 2975 hci_stack->le_scan_interval = 0x1e0; 2976 hci_stack->le_scan_window = 0x30; 2977 #endif 2978 2979 #ifdef ENABLE_LE_PERIPHERAL 2980 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2981 #endif 2982 2983 // connection parameter range used to answer connection parameter update requests in l2cap 2984 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2985 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2986 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2987 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2988 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2989 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2990 2991 hci_state_reset(); 2992 } 2993 2994 /** 2995 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2996 */ 2997 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2998 hci_stack->chipset = chipset_driver; 2999 3000 // reset chipset driver - init is also called on power_up 3001 if (hci_stack->chipset && hci_stack->chipset->init){ 3002 hci_stack->chipset->init(hci_stack->config); 3003 } 3004 } 3005 3006 /** 3007 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3008 */ 3009 void hci_set_control(const btstack_control_t *hardware_control){ 3010 // references to used control implementation 3011 hci_stack->control = hardware_control; 3012 // init with transport config 3013 hardware_control->init(hci_stack->config); 3014 } 3015 3016 void hci_close(void){ 3017 // close remote device db 3018 if (hci_stack->link_key_db) { 3019 hci_stack->link_key_db->close(); 3020 } 3021 3022 btstack_linked_list_iterator_t lit; 3023 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3024 while (btstack_linked_list_iterator_has_next(&lit)){ 3025 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3026 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3027 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3028 hci_shutdown_connection(connection); 3029 } 3030 3031 hci_power_control(HCI_POWER_OFF); 3032 3033 #ifdef HAVE_MALLOC 3034 free(hci_stack); 3035 #endif 3036 hci_stack = NULL; 3037 } 3038 3039 #ifdef ENABLE_CLASSIC 3040 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3041 // validate ranage and set 3042 if (encryption_key_size < 7) return; 3043 if (encryption_key_size > 16) return; 3044 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3045 } 3046 3047 void gap_set_security_level(gap_security_level_t security_level){ 3048 hci_stack->gap_security_level = security_level; 3049 } 3050 3051 gap_security_level_t gap_get_security_level(void){ 3052 return hci_stack->gap_security_level; 3053 } 3054 #endif 3055 3056 #ifdef ENABLE_CLASSIC 3057 void gap_set_class_of_device(uint32_t class_of_device){ 3058 hci_stack->class_of_device = class_of_device; 3059 } 3060 3061 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3062 hci_stack->default_link_policy_settings = default_link_policy_settings; 3063 } 3064 3065 void gap_set_allow_role_switch(bool allow_role_switch){ 3066 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3067 } 3068 3069 uint8_t hci_get_allow_role_switch(void){ 3070 return hci_stack->allow_role_switch; 3071 } 3072 3073 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3074 hci_stack->link_supervision_timeout = link_supervision_timeout; 3075 } 3076 3077 void hci_disable_l2cap_timeout_check(void){ 3078 disable_l2cap_timeouts = 1; 3079 } 3080 #endif 3081 3082 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3083 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3084 void hci_set_bd_addr(bd_addr_t addr){ 3085 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3086 hci_stack->custom_bd_addr_set = 1; 3087 } 3088 #endif 3089 3090 // State-Module-Driver overview 3091 // state module low-level 3092 // HCI_STATE_OFF off close 3093 // HCI_STATE_INITIALIZING, on open 3094 // HCI_STATE_WORKING, on open 3095 // HCI_STATE_HALTING, on open 3096 // HCI_STATE_SLEEPING, off/sleep close 3097 // HCI_STATE_FALLING_ASLEEP on open 3098 3099 static int hci_power_control_on(void){ 3100 3101 // power on 3102 int err = 0; 3103 if (hci_stack->control && hci_stack->control->on){ 3104 err = (*hci_stack->control->on)(); 3105 } 3106 if (err){ 3107 log_error( "POWER_ON failed"); 3108 hci_emit_hci_open_failed(); 3109 return err; 3110 } 3111 3112 // int chipset driver 3113 if (hci_stack->chipset && hci_stack->chipset->init){ 3114 hci_stack->chipset->init(hci_stack->config); 3115 } 3116 3117 // init transport 3118 if (hci_stack->hci_transport->init){ 3119 hci_stack->hci_transport->init(hci_stack->config); 3120 } 3121 3122 // open transport 3123 err = hci_stack->hci_transport->open(); 3124 if (err){ 3125 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3126 if (hci_stack->control && hci_stack->control->off){ 3127 (*hci_stack->control->off)(); 3128 } 3129 hci_emit_hci_open_failed(); 3130 return err; 3131 } 3132 return 0; 3133 } 3134 3135 static void hci_power_control_off(void){ 3136 3137 log_info("hci_power_control_off"); 3138 3139 // close low-level device 3140 hci_stack->hci_transport->close(); 3141 3142 log_info("hci_power_control_off - hci_transport closed"); 3143 3144 // power off 3145 if (hci_stack->control && hci_stack->control->off){ 3146 (*hci_stack->control->off)(); 3147 } 3148 3149 log_info("hci_power_control_off - control closed"); 3150 3151 hci_stack->state = HCI_STATE_OFF; 3152 } 3153 3154 static void hci_power_control_sleep(void){ 3155 3156 log_info("hci_power_control_sleep"); 3157 3158 #if 0 3159 // don't close serial port during sleep 3160 3161 // close low-level device 3162 hci_stack->hci_transport->close(hci_stack->config); 3163 #endif 3164 3165 // sleep mode 3166 if (hci_stack->control && hci_stack->control->sleep){ 3167 (*hci_stack->control->sleep)(); 3168 } 3169 3170 hci_stack->state = HCI_STATE_SLEEPING; 3171 } 3172 3173 static int hci_power_control_wake(void){ 3174 3175 log_info("hci_power_control_wake"); 3176 3177 // wake on 3178 if (hci_stack->control && hci_stack->control->wake){ 3179 (*hci_stack->control->wake)(); 3180 } 3181 3182 #if 0 3183 // open low-level device 3184 int err = hci_stack->hci_transport->open(hci_stack->config); 3185 if (err){ 3186 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3187 if (hci_stack->control && hci_stack->control->off){ 3188 (*hci_stack->control->off)(); 3189 } 3190 hci_emit_hci_open_failed(); 3191 return err; 3192 } 3193 #endif 3194 3195 return 0; 3196 } 3197 3198 static void hci_power_transition_to_initializing(void){ 3199 // set up state machine 3200 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3201 hci_stack->hci_packet_buffer_reserved = 0; 3202 hci_stack->state = HCI_STATE_INITIALIZING; 3203 hci_stack->substate = HCI_INIT_SEND_RESET; 3204 } 3205 3206 int hci_power_control(HCI_POWER_MODE power_mode){ 3207 3208 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3209 3210 int err = 0; 3211 switch (hci_stack->state){ 3212 3213 case HCI_STATE_OFF: 3214 switch (power_mode){ 3215 case HCI_POWER_ON: 3216 err = hci_power_control_on(); 3217 if (err) { 3218 log_error("hci_power_control_on() error %d", err); 3219 return err; 3220 } 3221 hci_power_transition_to_initializing(); 3222 break; 3223 case HCI_POWER_OFF: 3224 // do nothing 3225 break; 3226 case HCI_POWER_SLEEP: 3227 // do nothing (with SLEEP == OFF) 3228 break; 3229 } 3230 break; 3231 3232 case HCI_STATE_INITIALIZING: 3233 switch (power_mode){ 3234 case HCI_POWER_ON: 3235 // do nothing 3236 break; 3237 case HCI_POWER_OFF: 3238 // no connections yet, just turn it off 3239 hci_power_control_off(); 3240 break; 3241 case HCI_POWER_SLEEP: 3242 // no connections yet, just turn it off 3243 hci_power_control_sleep(); 3244 break; 3245 } 3246 break; 3247 3248 case HCI_STATE_WORKING: 3249 switch (power_mode){ 3250 case HCI_POWER_ON: 3251 // do nothing 3252 break; 3253 case HCI_POWER_OFF: 3254 // see hci_run 3255 hci_stack->state = HCI_STATE_HALTING; 3256 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3257 break; 3258 case HCI_POWER_SLEEP: 3259 // see hci_run 3260 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3261 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3262 break; 3263 } 3264 break; 3265 3266 case HCI_STATE_HALTING: 3267 switch (power_mode){ 3268 case HCI_POWER_ON: 3269 hci_power_transition_to_initializing(); 3270 break; 3271 case HCI_POWER_OFF: 3272 // do nothing 3273 break; 3274 case HCI_POWER_SLEEP: 3275 // see hci_run 3276 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3277 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3278 break; 3279 } 3280 break; 3281 3282 case HCI_STATE_FALLING_ASLEEP: 3283 switch (power_mode){ 3284 case HCI_POWER_ON: 3285 3286 #ifdef HAVE_PLATFORM_IPHONE_OS 3287 // nothing to do, if H4 supports power management 3288 if (btstack_control_iphone_power_management_enabled()){ 3289 hci_stack->state = HCI_STATE_INITIALIZING; 3290 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3291 break; 3292 } 3293 #endif 3294 hci_power_transition_to_initializing(); 3295 break; 3296 case HCI_POWER_OFF: 3297 // see hci_run 3298 hci_stack->state = HCI_STATE_HALTING; 3299 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3300 break; 3301 case HCI_POWER_SLEEP: 3302 // do nothing 3303 break; 3304 } 3305 break; 3306 3307 case HCI_STATE_SLEEPING: 3308 switch (power_mode){ 3309 case HCI_POWER_ON: 3310 3311 #ifdef HAVE_PLATFORM_IPHONE_OS 3312 // nothing to do, if H4 supports power management 3313 if (btstack_control_iphone_power_management_enabled()){ 3314 hci_stack->state = HCI_STATE_INITIALIZING; 3315 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3316 hci_update_scan_enable(); 3317 break; 3318 } 3319 #endif 3320 err = hci_power_control_wake(); 3321 if (err) return err; 3322 hci_power_transition_to_initializing(); 3323 break; 3324 case HCI_POWER_OFF: 3325 hci_stack->state = HCI_STATE_HALTING; 3326 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3327 break; 3328 case HCI_POWER_SLEEP: 3329 // do nothing 3330 break; 3331 } 3332 break; 3333 } 3334 3335 // create internal event 3336 hci_emit_state(); 3337 3338 // trigger next/first action 3339 hci_run(); 3340 3341 return 0; 3342 } 3343 3344 3345 #ifdef ENABLE_CLASSIC 3346 3347 static void hci_update_scan_enable(void){ 3348 // 2 = page scan, 1 = inq scan 3349 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3350 hci_run(); 3351 } 3352 3353 void gap_discoverable_control(uint8_t enable){ 3354 if (enable) enable = 1; // normalize argument 3355 3356 if (hci_stack->discoverable == enable){ 3357 hci_emit_discoverable_enabled(hci_stack->discoverable); 3358 return; 3359 } 3360 3361 hci_stack->discoverable = enable; 3362 hci_update_scan_enable(); 3363 } 3364 3365 void gap_connectable_control(uint8_t enable){ 3366 if (enable) enable = 1; // normalize argument 3367 3368 // don't emit event 3369 if (hci_stack->connectable == enable) return; 3370 3371 hci_stack->connectable = enable; 3372 hci_update_scan_enable(); 3373 } 3374 #endif 3375 3376 void gap_local_bd_addr(bd_addr_t address_buffer){ 3377 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3378 } 3379 3380 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3381 static void hci_host_num_completed_packets(void){ 3382 3383 // create packet manually as arrays are not supported and num_commands should not get reduced 3384 hci_reserve_packet_buffer(); 3385 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3386 3387 uint16_t size = 0; 3388 uint16_t num_handles = 0; 3389 packet[size++] = 0x35; 3390 packet[size++] = 0x0c; 3391 size++; // skip param len 3392 size++; // skip num handles 3393 3394 // add { handle, packets } entries 3395 btstack_linked_item_t * it; 3396 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3397 hci_connection_t * connection = (hci_connection_t *) it; 3398 if (connection->num_packets_completed){ 3399 little_endian_store_16(packet, size, connection->con_handle); 3400 size += 2; 3401 little_endian_store_16(packet, size, connection->num_packets_completed); 3402 size += 2; 3403 // 3404 num_handles++; 3405 connection->num_packets_completed = 0; 3406 } 3407 } 3408 3409 packet[2] = size - 3; 3410 packet[3] = num_handles; 3411 3412 hci_stack->host_completed_packets = 0; 3413 3414 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3415 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3416 3417 // release packet buffer for synchronous transport implementations 3418 if (hci_transport_synchronous()){ 3419 hci_release_packet_buffer(); 3420 hci_emit_transport_packet_sent(); 3421 } 3422 } 3423 #endif 3424 3425 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3426 UNUSED(ds); 3427 hci_stack->substate = HCI_HALTING_CLOSE; 3428 // allow packet handlers to defer final shutdown 3429 hci_emit_state(); 3430 hci_run(); 3431 } 3432 3433 static bool hci_run_acl_fragments(void){ 3434 if (hci_stack->acl_fragmentation_total_size > 0) { 3435 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3436 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3437 if (connection) { 3438 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3439 hci_send_acl_packet_fragments(connection); 3440 return true; 3441 } 3442 } else { 3443 // connection gone -> discard further fragments 3444 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3445 hci_stack->acl_fragmentation_total_size = 0; 3446 hci_stack->acl_fragmentation_pos = 0; 3447 } 3448 } 3449 return false; 3450 } 3451 3452 #ifdef ENABLE_CLASSIC 3453 static bool hci_run_general_gap_classic(void){ 3454 3455 // decline incoming connections 3456 if (hci_stack->decline_reason){ 3457 uint8_t reason = hci_stack->decline_reason; 3458 hci_stack->decline_reason = 0; 3459 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3460 return true; 3461 } 3462 // send scan enable 3463 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3464 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3465 hci_stack->new_scan_enable_value = 0xff; 3466 return true; 3467 } 3468 // start/stop inquiry 3469 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3470 uint8_t duration = hci_stack->inquiry_state; 3471 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3472 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3473 return true; 3474 } 3475 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3476 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3477 hci_send_cmd(&hci_inquiry_cancel); 3478 return true; 3479 } 3480 // remote name request 3481 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3482 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3483 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3484 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3485 return true; 3486 } 3487 // pairing 3488 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3489 uint8_t state = hci_stack->gap_pairing_state; 3490 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3491 switch (state){ 3492 case GAP_PAIRING_STATE_SEND_PIN: 3493 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); 3494 break; 3495 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3496 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3497 break; 3498 case GAP_PAIRING_STATE_SEND_PASSKEY: 3499 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3500 break; 3501 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3502 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3503 break; 3504 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3505 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3506 break; 3507 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3508 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3509 break; 3510 default: 3511 break; 3512 } 3513 return true; 3514 } 3515 return false; 3516 } 3517 #endif 3518 3519 #ifdef ENABLE_BLE 3520 static bool hci_run_general_gap_le(void){ 3521 3522 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3523 3524 if (hci_stack->state != HCI_STATE_WORKING) return false; 3525 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0) ) return false; 3526 3527 #ifdef ENABLE_LE_CENTRAL 3528 // parameter change requires scanning to be stopped first 3529 if (hci_stack->le_scan_type != 0xff) { 3530 if (hci_stack->le_scanning_active){ 3531 hci_stack->le_scanning_active = 0; 3532 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3533 } else { 3534 int scan_type = (int) hci_stack->le_scan_type; 3535 hci_stack->le_scan_type = 0xff; 3536 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); 3537 } 3538 return true; 3539 } 3540 // finally, we can enable/disable le scan 3541 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3542 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3543 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3544 return true; 3545 } 3546 #endif 3547 #ifdef ENABLE_LE_PERIPHERAL 3548 // le advertisement control 3549 if (hci_stack->le_advertisements_todo){ 3550 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3551 } 3552 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3553 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3554 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3555 return true; 3556 } 3557 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3558 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3559 hci_send_cmd(&hci_le_set_advertising_parameters, 3560 hci_stack->le_advertisements_interval_min, 3561 hci_stack->le_advertisements_interval_max, 3562 hci_stack->le_advertisements_type, 3563 hci_stack->le_own_addr_type, 3564 hci_stack->le_advertisements_direct_address_type, 3565 hci_stack->le_advertisements_direct_address, 3566 hci_stack->le_advertisements_channel_map, 3567 hci_stack->le_advertisements_filter_policy); 3568 return true; 3569 } 3570 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3571 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3572 uint8_t adv_data_clean[31]; 3573 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3574 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3575 hci_stack->le_advertisements_data_len); 3576 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3577 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3578 return true; 3579 } 3580 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3581 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3582 uint8_t scan_data_clean[31]; 3583 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3584 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3585 hci_stack->le_scan_response_data_len); 3586 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3587 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3588 return true; 3589 } 3590 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3591 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3592 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3593 return true; 3594 } 3595 #endif 3596 3597 #ifdef ENABLE_LE_CENTRAL 3598 // 3599 // LE Whitelist Management 3600 // 3601 3602 // check if whitelist needs modification 3603 btstack_linked_list_iterator_t lit; 3604 int modification_pending = 0; 3605 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3606 while (btstack_linked_list_iterator_has_next(&lit)){ 3607 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3608 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3609 modification_pending = 1; 3610 break; 3611 } 3612 } 3613 3614 if (modification_pending){ 3615 // stop connnecting if modification pending 3616 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3617 hci_send_cmd(&hci_le_create_connection_cancel); 3618 return true; 3619 } 3620 3621 // add/remove entries 3622 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3623 while (btstack_linked_list_iterator_has_next(&lit)){ 3624 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3625 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3626 entry->state = LE_WHITELIST_ON_CONTROLLER; 3627 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3628 return true; 3629 } 3630 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3631 bd_addr_t address; 3632 bd_addr_type_t address_type = entry->address_type; 3633 (void)memcpy(address, entry->address, 6); 3634 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3635 btstack_memory_whitelist_entry_free(entry); 3636 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3637 return true; 3638 } 3639 } 3640 } 3641 3642 // start connecting 3643 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3644 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3645 bd_addr_t null_addr; 3646 memset(null_addr, 0, 6); 3647 hci_send_cmd(&hci_le_create_connection, 3648 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3649 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3650 1, // use whitelist 3651 0, // peer address type 3652 null_addr, // peer bd addr 3653 hci_stack->le_own_addr_type, // our addr type: 3654 hci_stack->le_connection_interval_min, // conn interval min 3655 hci_stack->le_connection_interval_max, // conn interval max 3656 hci_stack->le_connection_latency, // conn latency 3657 hci_stack->le_supervision_timeout, // conn latency 3658 hci_stack->le_minimum_ce_length, // min ce length 3659 hci_stack->le_maximum_ce_length // max ce length 3660 ); 3661 return true; 3662 } 3663 #endif 3664 return false; 3665 } 3666 #endif 3667 3668 static bool hci_run_general_pending_commmands(void){ 3669 btstack_linked_item_t * it; 3670 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3671 hci_connection_t * connection = (hci_connection_t *) it; 3672 3673 switch(connection->state){ 3674 case SEND_CREATE_CONNECTION: 3675 switch(connection->address_type){ 3676 #ifdef ENABLE_CLASSIC 3677 case BD_ADDR_TYPE_ACL: 3678 log_info("sending hci_create_connection"); 3679 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3680 break; 3681 #endif 3682 default: 3683 #ifdef ENABLE_BLE 3684 #ifdef ENABLE_LE_CENTRAL 3685 // track outgoing connection 3686 hci_stack->outgoing_addr_type = connection->address_type; 3687 (void)memcpy(hci_stack->outgoing_addr, 3688 connection->address, 6); 3689 log_info("sending hci_le_create_connection"); 3690 hci_send_cmd(&hci_le_create_connection, 3691 hci_stack->le_connection_scan_interval, // conn scan interval 3692 hci_stack->le_connection_scan_window, // conn scan windows 3693 0, // don't use whitelist 3694 connection->address_type, // peer address type 3695 connection->address, // peer bd addr 3696 hci_stack->le_own_addr_type, // our addr type: 3697 hci_stack->le_connection_interval_min, // conn interval min 3698 hci_stack->le_connection_interval_max, // conn interval max 3699 hci_stack->le_connection_latency, // conn latency 3700 hci_stack->le_supervision_timeout, // conn latency 3701 hci_stack->le_minimum_ce_length, // min ce length 3702 hci_stack->le_maximum_ce_length // max ce length 3703 ); 3704 connection->state = SENT_CREATE_CONNECTION; 3705 #endif 3706 #endif 3707 break; 3708 } 3709 return true; 3710 3711 #ifdef ENABLE_CLASSIC 3712 case RECEIVED_CONNECTION_REQUEST: 3713 connection->role = HCI_ROLE_SLAVE; 3714 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3715 log_info("sending hci_accept_connection_request"); 3716 connection->state = ACCEPTED_CONNECTION_REQUEST; 3717 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3718 } 3719 return true; 3720 #endif 3721 3722 #ifdef ENABLE_BLE 3723 #ifdef ENABLE_LE_CENTRAL 3724 case SEND_CANCEL_CONNECTION: 3725 connection->state = SENT_CANCEL_CONNECTION; 3726 hci_send_cmd(&hci_le_create_connection_cancel); 3727 return true; 3728 #endif 3729 #endif 3730 case SEND_DISCONNECT: 3731 connection->state = SENT_DISCONNECT; 3732 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3733 return true; 3734 3735 default: 3736 break; 3737 } 3738 3739 // no further commands if connection is about to get shut down 3740 if (connection->state == SENT_DISCONNECT) continue; 3741 3742 if (connection->authentication_flags & READ_RSSI){ 3743 connectionClearAuthenticationFlags(connection, READ_RSSI); 3744 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3745 return true; 3746 } 3747 3748 #ifdef ENABLE_CLASSIC 3749 3750 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3751 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3752 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3753 return true; 3754 } 3755 3756 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3757 log_info("responding to link key request"); 3758 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3759 link_key_t link_key; 3760 link_key_type_t link_key_type; 3761 if ( hci_stack->link_key_db 3762 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3763 && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level)){ 3764 connection->link_key_type = link_key_type; 3765 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3766 } else { 3767 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3768 } 3769 return true; 3770 } 3771 3772 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3773 log_info("denying to pin request"); 3774 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3775 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3776 return true; 3777 } 3778 3779 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3780 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3781 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3782 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3783 // tweak authentication requirements 3784 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3785 if (connection->bonding_flags & BONDING_DEDICATED){ 3786 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3787 } 3788 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3789 authreq |= 1; 3790 } 3791 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3792 } else { 3793 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3794 } 3795 return true; 3796 } 3797 3798 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3799 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3800 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3801 return true; 3802 } 3803 3804 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3805 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3806 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3807 return true; 3808 } 3809 3810 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 3811 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 3812 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3813 return true; 3814 } 3815 3816 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 3817 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3818 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 3819 return true; 3820 } 3821 3822 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3823 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3824 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3825 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3826 return true; 3827 } 3828 3829 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3830 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3831 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3832 return true; 3833 } 3834 3835 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3836 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3837 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3838 return true; 3839 } 3840 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3841 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3842 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3843 return true; 3844 } 3845 #endif 3846 3847 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3848 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3849 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3850 return true; 3851 } 3852 3853 #ifdef ENABLE_CLASSIC 3854 uint16_t sniff_min_interval; 3855 switch (connection->sniff_min_interval){ 3856 case 0: 3857 break; 3858 case 0xffff: 3859 connection->sniff_min_interval = 0; 3860 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3861 return true; 3862 default: 3863 sniff_min_interval = connection->sniff_min_interval; 3864 connection->sniff_min_interval = 0; 3865 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3866 return true; 3867 } 3868 #endif 3869 3870 #ifdef ENABLE_BLE 3871 switch (connection->le_con_parameter_update_state){ 3872 // response to L2CAP CON PARAMETER UPDATE REQUEST 3873 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3874 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3875 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3876 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3877 0x0000, 0xffff); 3878 return true; 3879 case CON_PARAMETER_UPDATE_REPLY: 3880 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3881 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3882 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3883 0x0000, 0xffff); 3884 return true; 3885 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3886 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3887 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3888 return true; 3889 default: 3890 break; 3891 } 3892 if (connection->le_phy_update_all_phys != 0xff){ 3893 uint8_t all_phys = connection->le_phy_update_all_phys; 3894 connection->le_phy_update_all_phys = 0xff; 3895 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); 3896 return true; 3897 } 3898 #endif 3899 } 3900 return false; 3901 } 3902 3903 static void hci_run(void){ 3904 3905 bool done; 3906 3907 // send continuation fragments first, as they block the prepared packet buffer 3908 done = hci_run_acl_fragments(); 3909 if (done) return; 3910 3911 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3912 // send host num completed packets next as they don't require num_cmd_packets > 0 3913 if (!hci_can_send_comand_packet_transport()) return; 3914 if (hci_stack->host_completed_packets){ 3915 hci_host_num_completed_packets(); 3916 return; 3917 } 3918 #endif 3919 3920 if (!hci_can_send_command_packet_now()) return; 3921 3922 // global/non-connection oriented commands 3923 3924 3925 #ifdef ENABLE_CLASSIC 3926 // general gap classic 3927 done = hci_run_general_gap_classic(); 3928 if (done) return; 3929 #endif 3930 3931 #ifdef ENABLE_BLE 3932 // general gap le 3933 done = hci_run_general_gap_le(); 3934 if (done) return; 3935 #endif 3936 3937 // send pending HCI commands 3938 done = hci_run_general_pending_commmands(); 3939 if (done) return; 3940 3941 // stack state sub statemachines 3942 hci_connection_t * connection; 3943 switch (hci_stack->state){ 3944 case HCI_STATE_INITIALIZING: 3945 hci_initializing_run(); 3946 break; 3947 3948 case HCI_STATE_HALTING: 3949 3950 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3951 switch (hci_stack->substate){ 3952 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3953 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3954 3955 #ifdef ENABLE_BLE 3956 #ifdef ENABLE_LE_CENTRAL 3957 // free whitelist entries 3958 { 3959 btstack_linked_list_iterator_t lit; 3960 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3961 while (btstack_linked_list_iterator_has_next(&lit)){ 3962 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3963 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3964 btstack_memory_whitelist_entry_free(entry); 3965 } 3966 } 3967 #endif 3968 #endif 3969 // close all open connections 3970 connection = (hci_connection_t *) hci_stack->connections; 3971 if (connection){ 3972 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3973 if (!hci_can_send_command_packet_now()) return; 3974 3975 // check state 3976 if (connection->state == SENT_DISCONNECT) return; 3977 connection->state = SENT_DISCONNECT; 3978 3979 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3980 3981 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3982 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3983 3984 // ... which would be ignored anyway as we shutdown (free) the connection now 3985 hci_shutdown_connection(connection); 3986 3987 // finally, send the disconnect command 3988 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3989 return; 3990 } 3991 3992 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3993 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3994 log_info("HCI_STATE_HALTING: wait 50 ms"); 3995 hci_stack->substate = HCI_HALTING_W4_TIMER; 3996 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3997 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3998 btstack_run_loop_add_timer(&hci_stack->timeout); 3999 break; 4000 } 4001 4002 /* fall through */ 4003 4004 case HCI_HALTING_CLOSE: 4005 log_info("HCI_STATE_HALTING, calling off"); 4006 4007 // switch mode 4008 hci_power_control_off(); 4009 4010 log_info("HCI_STATE_HALTING, emitting state"); 4011 hci_emit_state(); 4012 log_info("HCI_STATE_HALTING, done"); 4013 break; 4014 4015 case HCI_HALTING_W4_TIMER: 4016 // keep waiting 4017 4018 break; 4019 default: 4020 break; 4021 } 4022 4023 break; 4024 4025 case HCI_STATE_FALLING_ASLEEP: 4026 switch(hci_stack->substate) { 4027 case HCI_FALLING_ASLEEP_DISCONNECT: 4028 log_info("HCI_STATE_FALLING_ASLEEP"); 4029 // close all open connections 4030 connection = (hci_connection_t *) hci_stack->connections; 4031 4032 #ifdef HAVE_PLATFORM_IPHONE_OS 4033 // don't close connections, if H4 supports power management 4034 if (btstack_control_iphone_power_management_enabled()){ 4035 connection = NULL; 4036 } 4037 #endif 4038 if (connection){ 4039 4040 // send disconnect 4041 if (!hci_can_send_command_packet_now()) return; 4042 4043 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4044 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 4045 4046 // send disconnected event right away - causes higher layer connections to get closed, too. 4047 hci_shutdown_connection(connection); 4048 return; 4049 } 4050 4051 if (hci_classic_supported()){ 4052 // disable page and inquiry scan 4053 if (!hci_can_send_command_packet_now()) return; 4054 4055 log_info("HCI_STATE_HALTING, disabling inq scans"); 4056 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4057 4058 // continue in next sub state 4059 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4060 break; 4061 } 4062 4063 /* fall through */ 4064 4065 case HCI_FALLING_ASLEEP_COMPLETE: 4066 log_info("HCI_STATE_HALTING, calling sleep"); 4067 #ifdef HAVE_PLATFORM_IPHONE_OS 4068 // don't actually go to sleep, if H4 supports power management 4069 if (btstack_control_iphone_power_management_enabled()){ 4070 // SLEEP MODE reached 4071 hci_stack->state = HCI_STATE_SLEEPING; 4072 hci_emit_state(); 4073 break; 4074 } 4075 #endif 4076 // switch mode 4077 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4078 hci_emit_state(); 4079 break; 4080 4081 default: 4082 break; 4083 } 4084 break; 4085 4086 default: 4087 break; 4088 } 4089 } 4090 4091 int hci_send_cmd_packet(uint8_t *packet, int size){ 4092 // house-keeping 4093 4094 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 4095 hci_stack->loopback_mode = packet[3]; 4096 } 4097 4098 #ifdef ENABLE_CLASSIC 4099 bd_addr_t addr; 4100 hci_connection_t * conn; 4101 4102 // create_connection? 4103 if (IS_COMMAND(packet, hci_create_connection)){ 4104 reverse_bd_addr(&packet[3], addr); 4105 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4106 4107 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4108 if (!conn){ 4109 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4110 if (!conn){ 4111 // notify client that alloc failed 4112 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4113 return -1; // packet not sent to controller 4114 } 4115 conn->state = SEND_CREATE_CONNECTION; 4116 } 4117 log_info("conn state %u", conn->state); 4118 switch (conn->state){ 4119 // if connection active exists 4120 case OPEN: 4121 // and OPEN, emit connection complete command 4122 hci_emit_connection_complete(addr, conn->con_handle, 0); 4123 return -1; // packet not sent to controller 4124 case RECEIVED_DISCONNECTION_COMPLETE: 4125 // create connection triggered in disconnect complete event, let's do it now 4126 break; 4127 case SEND_CREATE_CONNECTION: 4128 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4129 break; 4130 default: 4131 // otherwise, just ignore as it is already in the open process 4132 return -1; // packet not sent to controller 4133 } 4134 conn->state = SENT_CREATE_CONNECTION; 4135 4136 // track outgoing connection 4137 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4138 (void)memcpy(hci_stack->outgoing_addr, addr, 6); 4139 } 4140 4141 else if (IS_COMMAND(packet, hci_link_key_request_reply)){ 4142 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4143 } 4144 else if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 4145 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4146 } 4147 4148 else if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 4149 if (hci_stack->link_key_db){ 4150 reverse_bd_addr(&packet[3], addr); 4151 hci_stack->link_key_db->delete_link_key(addr); 4152 } 4153 } 4154 4155 else if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 4156 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 4157 reverse_bd_addr(&packet[3], addr); 4158 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4159 if (conn){ 4160 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4161 } 4162 } 4163 4164 else if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 4165 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 4166 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 4167 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 4168 reverse_bd_addr(&packet[3], addr); 4169 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4170 if (conn){ 4171 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4172 } 4173 } 4174 4175 #ifdef ENABLE_SCO_OVER_HCI 4176 // setup_synchronous_connection? Voice setting at offset 22 4177 else if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 4178 // TODO: compare to current setting if sco connection already active 4179 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4180 } 4181 // accept_synchronus_connection? Voice setting at offset 18 4182 else if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 4183 // TODO: compare to current setting if sco connection already active 4184 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4185 } 4186 #endif 4187 #endif 4188 4189 #ifdef ENABLE_BLE 4190 else if (IS_COMMAND(packet, hci_le_set_random_address)){ 4191 hci_stack->le_random_address_set = 1; 4192 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4193 } 4194 #ifdef ENABLE_LE_PERIPHERAL 4195 else if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 4196 hci_stack->le_advertisements_active = packet[3]; 4197 } 4198 #endif 4199 #ifdef ENABLE_LE_CENTRAL 4200 else if (IS_COMMAND(packet, hci_le_create_connection)){ 4201 // white list used? 4202 uint8_t initiator_filter_policy = packet[7]; 4203 switch (initiator_filter_policy){ 4204 case 0: 4205 // whitelist not used 4206 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4207 break; 4208 case 1: 4209 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4210 break; 4211 default: 4212 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4213 break; 4214 } 4215 } 4216 else if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4217 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4218 } 4219 #endif 4220 #endif 4221 4222 hci_stack->num_cmd_packets--; 4223 4224 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4225 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4226 } 4227 4228 // disconnect because of security block 4229 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4230 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4231 if (!connection) return; 4232 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4233 } 4234 4235 4236 // Configure Secure Simple Pairing 4237 4238 #ifdef ENABLE_CLASSIC 4239 4240 // enable will enable SSP during init 4241 void gap_ssp_set_enable(int enable){ 4242 hci_stack->ssp_enable = enable; 4243 } 4244 4245 static int hci_local_ssp_activated(void){ 4246 return gap_ssp_supported() && hci_stack->ssp_enable; 4247 } 4248 4249 // if set, BTstack will respond to io capability request using authentication requirement 4250 void gap_ssp_set_io_capability(int io_capability){ 4251 hci_stack->ssp_io_capability = io_capability; 4252 } 4253 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4254 hci_stack->ssp_authentication_requirement = authentication_requirement; 4255 } 4256 4257 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4258 void gap_ssp_set_auto_accept(int auto_accept){ 4259 hci_stack->ssp_auto_accept = auto_accept; 4260 } 4261 4262 void gap_secure_connections_enable(bool enable){ 4263 hci_stack->secure_connections_enable = enable; 4264 } 4265 4266 #endif 4267 4268 // va_list part of hci_send_cmd 4269 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4270 if (!hci_can_send_command_packet_now()){ 4271 log_error("hci_send_cmd called but cannot send packet now"); 4272 return 0; 4273 } 4274 4275 // for HCI INITIALIZATION 4276 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4277 hci_stack->last_cmd_opcode = cmd->opcode; 4278 4279 hci_reserve_packet_buffer(); 4280 uint8_t * packet = hci_stack->hci_packet_buffer; 4281 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4282 int err = hci_send_cmd_packet(packet, size); 4283 4284 // release packet buffer on error or for synchronous transport implementations 4285 if ((err < 0) || hci_transport_synchronous()){ 4286 hci_release_packet_buffer(); 4287 hci_emit_transport_packet_sent(); 4288 } 4289 4290 return err; 4291 } 4292 4293 /** 4294 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4295 */ 4296 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4297 va_list argptr; 4298 va_start(argptr, cmd); 4299 int res = hci_send_cmd_va_arg(cmd, argptr); 4300 va_end(argptr); 4301 return res; 4302 } 4303 4304 // Create various non-HCI events. 4305 // TODO: generalize, use table similar to hci_create_command 4306 4307 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4308 // dump packet 4309 if (dump) { 4310 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4311 } 4312 4313 // dispatch to all event handlers 4314 btstack_linked_list_iterator_t it; 4315 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4316 while (btstack_linked_list_iterator_has_next(&it)){ 4317 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4318 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4319 } 4320 } 4321 4322 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4323 if (!hci_stack->acl_packet_handler) return; 4324 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4325 } 4326 4327 #ifdef ENABLE_CLASSIC 4328 static void hci_notify_if_sco_can_send_now(void){ 4329 // notify SCO sender if waiting 4330 if (!hci_stack->sco_waiting_for_can_send_now) return; 4331 if (hci_can_send_sco_packet_now()){ 4332 hci_stack->sco_waiting_for_can_send_now = 0; 4333 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4334 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4335 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4336 } 4337 } 4338 4339 // parsing end emitting has been merged to reduce code size 4340 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4341 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4342 4343 uint8_t * eir_data; 4344 ad_context_t context; 4345 const uint8_t * name; 4346 uint8_t name_len; 4347 4348 if (size < 3) return; 4349 4350 int event_type = hci_event_packet_get_type(packet); 4351 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4352 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4353 4354 switch (event_type){ 4355 case HCI_EVENT_INQUIRY_RESULT: 4356 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4357 if (size != (3 + (num_responses * 14))) return; 4358 break; 4359 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4360 if (size != 257) return; 4361 if (num_responses != 1) return; 4362 break; 4363 default: 4364 return; 4365 } 4366 4367 // event[1] is set at the end 4368 int i; 4369 for (i=0; i<num_responses;i++){ 4370 memset(event, 0, sizeof(event)); 4371 event[0] = GAP_EVENT_INQUIRY_RESULT; 4372 uint8_t event_size = 18; // if name is not set by EIR 4373 4374 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4375 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4376 (void)memcpy(&event[9], 4377 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4378 3); // class of device 4379 (void)memcpy(&event[12], 4380 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4381 2); // clock offset 4382 4383 switch (event_type){ 4384 case HCI_EVENT_INQUIRY_RESULT: 4385 // 14,15,16,17 = 0, size 18 4386 break; 4387 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4388 event[14] = 1; 4389 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4390 // 16,17 = 0, size 18 4391 break; 4392 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4393 event[14] = 1; 4394 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4395 // EIR packets only contain a single inquiry response 4396 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4397 name = NULL; 4398 // Iterate over EIR data 4399 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4400 uint8_t data_type = ad_iterator_get_data_type(&context); 4401 uint8_t data_size = ad_iterator_get_data_len(&context); 4402 const uint8_t * data = ad_iterator_get_data(&context); 4403 // Prefer Complete Local Name over Shortend Local Name 4404 switch (data_type){ 4405 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4406 if (name) continue; 4407 /* fall through */ 4408 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4409 name = data; 4410 name_len = data_size; 4411 break; 4412 default: 4413 break; 4414 } 4415 } 4416 if (name){ 4417 event[16] = 1; 4418 // truncate name if needed 4419 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4420 event[17] = len; 4421 (void)memcpy(&event[18], name, len); 4422 event_size += len; 4423 } 4424 break; 4425 } 4426 event[1] = event_size - 2; 4427 hci_emit_event(event, event_size, 1); 4428 } 4429 } 4430 #endif 4431 4432 void hci_emit_state(void){ 4433 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4434 uint8_t event[3]; 4435 event[0] = BTSTACK_EVENT_STATE; 4436 event[1] = sizeof(event) - 2; 4437 event[2] = hci_stack->state; 4438 hci_emit_event(event, sizeof(event), 1); 4439 } 4440 4441 #ifdef ENABLE_CLASSIC 4442 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4443 uint8_t event[13]; 4444 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4445 event[1] = sizeof(event) - 2; 4446 event[2] = status; 4447 little_endian_store_16(event, 3, con_handle); 4448 reverse_bd_addr(address, &event[5]); 4449 event[11] = 1; // ACL connection 4450 event[12] = 0; // encryption disabled 4451 hci_emit_event(event, sizeof(event), 1); 4452 } 4453 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4454 if (disable_l2cap_timeouts) return; 4455 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4456 uint8_t event[4]; 4457 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4458 event[1] = sizeof(event) - 2; 4459 little_endian_store_16(event, 2, conn->con_handle); 4460 hci_emit_event(event, sizeof(event), 1); 4461 } 4462 #endif 4463 4464 #ifdef ENABLE_BLE 4465 #ifdef ENABLE_LE_CENTRAL 4466 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4467 uint8_t event[21]; 4468 event[0] = HCI_EVENT_LE_META; 4469 event[1] = sizeof(event) - 2; 4470 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4471 event[3] = status; 4472 little_endian_store_16(event, 4, con_handle); 4473 event[6] = 0; // TODO: role 4474 event[7] = address_type; 4475 reverse_bd_addr(address, &event[8]); 4476 little_endian_store_16(event, 14, 0); // interval 4477 little_endian_store_16(event, 16, 0); // latency 4478 little_endian_store_16(event, 18, 0); // supervision timeout 4479 event[20] = 0; // master clock accuracy 4480 hci_emit_event(event, sizeof(event), 1); 4481 } 4482 #endif 4483 #endif 4484 4485 static void hci_emit_transport_packet_sent(void){ 4486 // notify upper stack that it might be possible to send again 4487 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4488 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4489 } 4490 4491 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4492 uint8_t event[6]; 4493 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4494 event[1] = sizeof(event) - 2; 4495 event[2] = 0; // status = OK 4496 little_endian_store_16(event, 3, con_handle); 4497 event[5] = reason; 4498 hci_emit_event(event, sizeof(event), 1); 4499 } 4500 4501 static void hci_emit_nr_connections_changed(void){ 4502 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4503 uint8_t event[3]; 4504 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4505 event[1] = sizeof(event) - 2; 4506 event[2] = nr_hci_connections(); 4507 hci_emit_event(event, sizeof(event), 1); 4508 } 4509 4510 static void hci_emit_hci_open_failed(void){ 4511 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4512 uint8_t event[2]; 4513 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4514 event[1] = sizeof(event) - 2; 4515 hci_emit_event(event, sizeof(event), 1); 4516 } 4517 4518 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4519 log_info("hci_emit_dedicated_bonding_result %u ", status); 4520 uint8_t event[9]; 4521 int pos = 0; 4522 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4523 event[pos++] = sizeof(event) - 2; 4524 event[pos++] = status; 4525 reverse_bd_addr(address, &event[pos]); 4526 hci_emit_event(event, sizeof(event), 1); 4527 } 4528 4529 4530 #ifdef ENABLE_CLASSIC 4531 4532 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4533 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4534 uint8_t event[5]; 4535 int pos = 0; 4536 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4537 event[pos++] = sizeof(event) - 2; 4538 little_endian_store_16(event, 2, con_handle); 4539 pos += 2; 4540 event[pos++] = level; 4541 hci_emit_event(event, sizeof(event), 1); 4542 } 4543 4544 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4545 if (!connection) return LEVEL_0; 4546 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4547 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4548 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4549 // LEVEL 4 always requires 128 bit encrytion key size 4550 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4551 security_level = LEVEL_3; 4552 } 4553 return security_level; 4554 } 4555 4556 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4557 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4558 uint8_t event[3]; 4559 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4560 event[1] = sizeof(event) - 2; 4561 event[2] = enabled; 4562 hci_emit_event(event, sizeof(event), 1); 4563 } 4564 4565 // query if remote side supports eSCO 4566 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4567 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4568 if (!connection) return 0; 4569 return (connection->remote_supported_features[0] & 1) != 0; 4570 } 4571 4572 // query if remote side supports SSP 4573 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4574 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4575 if (!connection) return 0; 4576 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER) ? 1 : 0; 4577 } 4578 4579 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4580 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4581 } 4582 4583 // GAP API 4584 /** 4585 * @bbrief enable/disable bonding. default is enabled 4586 * @praram enabled 4587 */ 4588 void gap_set_bondable_mode(int enable){ 4589 hci_stack->bondable = enable ? 1 : 0; 4590 } 4591 /** 4592 * @brief Get bondable mode. 4593 * @return 1 if bondable 4594 */ 4595 int gap_get_bondable_mode(void){ 4596 return hci_stack->bondable; 4597 } 4598 4599 /** 4600 * @brief map link keys to security levels 4601 */ 4602 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4603 switch (link_key_type){ 4604 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4605 return LEVEL_4; 4606 case COMBINATION_KEY: 4607 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4608 return LEVEL_3; 4609 default: 4610 return LEVEL_2; 4611 } 4612 } 4613 4614 /** 4615 * @brief map link keys to secure connection yes/no 4616 */ 4617 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4618 switch (link_key_type){ 4619 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4620 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4621 return 1; 4622 default: 4623 return 0; 4624 } 4625 } 4626 4627 /** 4628 * @brief map link keys to authenticated 4629 */ 4630 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4631 switch (link_key_type){ 4632 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4633 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4634 return 1; 4635 default: 4636 return 0; 4637 } 4638 } 4639 4640 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4641 log_info("gap_mitm_protection_required_for_security_level %u", level); 4642 return level > LEVEL_2; 4643 } 4644 4645 /** 4646 * @brief get current security level 4647 */ 4648 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4649 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4650 if (!connection) return LEVEL_0; 4651 return gap_security_level_for_connection(connection); 4652 } 4653 4654 /** 4655 * @brief request connection to device to 4656 * @result GAP_AUTHENTICATION_RESULT 4657 */ 4658 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4659 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4660 if (!connection){ 4661 hci_emit_security_level(con_handle, LEVEL_0); 4662 return; 4663 } 4664 gap_security_level_t current_level = gap_security_level(con_handle); 4665 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4666 requested_level, connection->requested_security_level, current_level); 4667 4668 // assumption: earlier requested security higher than current level => security request is active 4669 if (current_level < connection->requested_security_level){ 4670 if (connection->requested_security_level < requested_level){ 4671 // increase requested level as new level is higher 4672 4673 // TODO: handle re-authentication when done 4674 4675 connection->requested_security_level = requested_level; 4676 } 4677 return; 4678 } 4679 4680 // no request active, notify if security sufficient 4681 if (requested_level <= current_level){ 4682 hci_emit_security_level(con_handle, current_level); 4683 return; 4684 } 4685 4686 // start pairing to increase security level 4687 connection->requested_security_level = requested_level; 4688 4689 #if 0 4690 // sending encryption request without a link key results in an error. 4691 // TODO: figure out how to use it properly 4692 4693 // would enabling ecnryption suffice (>= LEVEL_2)? 4694 if (hci_stack->link_key_db){ 4695 link_key_type_t link_key_type; 4696 link_key_t link_key; 4697 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4698 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4699 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4700 return; 4701 } 4702 } 4703 } 4704 #endif 4705 4706 // start to authenticate connection 4707 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4708 hci_run(); 4709 } 4710 4711 /** 4712 * @brief start dedicated bonding with device. disconnect after bonding 4713 * @param device 4714 * @param request MITM protection 4715 * @result GAP_DEDICATED_BONDING_COMPLETE 4716 */ 4717 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4718 4719 // create connection state machine 4720 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4721 4722 if (!connection){ 4723 return BTSTACK_MEMORY_ALLOC_FAILED; 4724 } 4725 4726 // delete linkn key 4727 gap_drop_link_key_for_bd_addr(device); 4728 4729 // configure LEVEL_2/3, dedicated bonding 4730 connection->state = SEND_CREATE_CONNECTION; 4731 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4732 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4733 connection->bonding_flags = BONDING_DEDICATED; 4734 4735 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4736 4737 // handle: connnection failure (connection complete != ok) 4738 // handle: authentication failure 4739 // handle: disconnect on done 4740 4741 hci_run(); 4742 4743 return 0; 4744 } 4745 #endif 4746 4747 void gap_set_local_name(const char * local_name){ 4748 hci_stack->local_name = local_name; 4749 } 4750 4751 4752 #ifdef ENABLE_BLE 4753 4754 #ifdef ENABLE_LE_CENTRAL 4755 void gap_start_scan(void){ 4756 hci_stack->le_scanning_enabled = 1; 4757 hci_run(); 4758 } 4759 4760 void gap_stop_scan(void){ 4761 hci_stack->le_scanning_enabled = 0; 4762 hci_run(); 4763 } 4764 4765 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4766 hci_stack->le_scan_type = scan_type; 4767 hci_stack->le_scan_interval = scan_interval; 4768 hci_stack->le_scan_window = scan_window; 4769 hci_run(); 4770 } 4771 4772 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4773 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4774 if (!conn){ 4775 log_info("gap_connect: no connection exists yet, creating context"); 4776 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4777 if (!conn){ 4778 // notify client that alloc failed 4779 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4780 log_info("gap_connect: failed to alloc hci_connection_t"); 4781 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4782 } 4783 conn->state = SEND_CREATE_CONNECTION; 4784 log_info("gap_connect: send create connection next"); 4785 hci_run(); 4786 return ERROR_CODE_SUCCESS; 4787 } 4788 4789 if (!hci_is_le_connection(conn) || 4790 (conn->state == SEND_CREATE_CONNECTION) || 4791 (conn->state == SENT_CREATE_CONNECTION)) { 4792 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4793 log_error("gap_connect: classic connection or connect is already being created"); 4794 return GATT_CLIENT_IN_WRONG_STATE; 4795 } 4796 4797 // check if connection was just disconnected 4798 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4799 log_info("gap_connect: send create connection (again)"); 4800 conn->state = SEND_CREATE_CONNECTION; 4801 hci_run(); 4802 return ERROR_CODE_SUCCESS; 4803 } 4804 4805 log_info("gap_connect: context exists with state %u", conn->state); 4806 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4807 hci_run(); 4808 return ERROR_CODE_SUCCESS; 4809 } 4810 4811 // @assumption: only a single outgoing LE Connection exists 4812 static hci_connection_t * gap_get_outgoing_connection(void){ 4813 btstack_linked_item_t *it; 4814 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4815 hci_connection_t * conn = (hci_connection_t *) it; 4816 if (!hci_is_le_connection(conn)) continue; 4817 switch (conn->state){ 4818 case SEND_CREATE_CONNECTION: 4819 case SENT_CREATE_CONNECTION: 4820 case SENT_CANCEL_CONNECTION: 4821 return conn; 4822 default: 4823 break; 4824 }; 4825 } 4826 return NULL; 4827 } 4828 4829 uint8_t gap_connect_cancel(void){ 4830 hci_connection_t * conn = gap_get_outgoing_connection(); 4831 if (!conn) return 0; 4832 switch (conn->state){ 4833 case SEND_CREATE_CONNECTION: 4834 // skip sending create connection and emit event instead 4835 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4836 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4837 btstack_memory_hci_connection_free( conn ); 4838 break; 4839 case SENT_CREATE_CONNECTION: 4840 // request to send cancel connection 4841 conn->state = SEND_CANCEL_CONNECTION; 4842 hci_run(); 4843 break; 4844 default: 4845 break; 4846 } 4847 return 0; 4848 } 4849 #endif 4850 4851 #ifdef ENABLE_LE_CENTRAL 4852 /** 4853 * @brief Set connection parameters for outgoing connections 4854 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4855 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4856 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4857 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4858 * @param conn_latency, default: 4 4859 * @param supervision_timeout (unit: 10ms), default: 720 ms 4860 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4861 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4862 */ 4863 4864 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4865 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4866 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4867 hci_stack->le_connection_scan_interval = conn_scan_interval; 4868 hci_stack->le_connection_scan_window = conn_scan_window; 4869 hci_stack->le_connection_interval_min = conn_interval_min; 4870 hci_stack->le_connection_interval_max = conn_interval_max; 4871 hci_stack->le_connection_latency = conn_latency; 4872 hci_stack->le_supervision_timeout = supervision_timeout; 4873 hci_stack->le_minimum_ce_length = min_ce_length; 4874 hci_stack->le_maximum_ce_length = max_ce_length; 4875 } 4876 #endif 4877 4878 /** 4879 * @brief Updates the connection parameters for a given LE connection 4880 * @param handle 4881 * @param conn_interval_min (unit: 1.25ms) 4882 * @param conn_interval_max (unit: 1.25ms) 4883 * @param conn_latency 4884 * @param supervision_timeout (unit: 10ms) 4885 * @returns 0 if ok 4886 */ 4887 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4888 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4889 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4890 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4891 connection->le_conn_interval_min = conn_interval_min; 4892 connection->le_conn_interval_max = conn_interval_max; 4893 connection->le_conn_latency = conn_latency; 4894 connection->le_supervision_timeout = supervision_timeout; 4895 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4896 hci_run(); 4897 return 0; 4898 } 4899 4900 /** 4901 * @brief Request an update of the connection parameter for a given LE connection 4902 * @param handle 4903 * @param conn_interval_min (unit: 1.25ms) 4904 * @param conn_interval_max (unit: 1.25ms) 4905 * @param conn_latency 4906 * @param supervision_timeout (unit: 10ms) 4907 * @returns 0 if ok 4908 */ 4909 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4910 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4911 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4912 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4913 connection->le_conn_interval_min = conn_interval_min; 4914 connection->le_conn_interval_max = conn_interval_max; 4915 connection->le_conn_latency = conn_latency; 4916 connection->le_supervision_timeout = supervision_timeout; 4917 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4918 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 4919 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 4920 return 0; 4921 } 4922 4923 #ifdef ENABLE_LE_PERIPHERAL 4924 4925 static void gap_advertisments_changed(void){ 4926 // disable advertisements before updating adv, scan data, or adv params 4927 if (hci_stack->le_advertisements_active){ 4928 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4929 } 4930 hci_run(); 4931 } 4932 4933 /** 4934 * @brief Set Advertisement Data 4935 * @param advertising_data_length 4936 * @param advertising_data (max 31 octets) 4937 * @note data is not copied, pointer has to stay valid 4938 */ 4939 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4940 hci_stack->le_advertisements_data_len = advertising_data_length; 4941 hci_stack->le_advertisements_data = advertising_data; 4942 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4943 gap_advertisments_changed(); 4944 } 4945 4946 /** 4947 * @brief Set Scan Response Data 4948 * @param advertising_data_length 4949 * @param advertising_data (max 31 octets) 4950 * @note data is not copied, pointer has to stay valid 4951 */ 4952 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4953 hci_stack->le_scan_response_data_len = scan_response_data_length; 4954 hci_stack->le_scan_response_data = scan_response_data; 4955 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4956 gap_advertisments_changed(); 4957 } 4958 4959 /** 4960 * @brief Set Advertisement Parameters 4961 * @param adv_int_min 4962 * @param adv_int_max 4963 * @param adv_type 4964 * @param direct_address_type 4965 * @param direct_address 4966 * @param channel_map 4967 * @param filter_policy 4968 * 4969 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4970 */ 4971 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4972 uint8_t direct_address_typ, bd_addr_t direct_address, 4973 uint8_t channel_map, uint8_t filter_policy) { 4974 4975 hci_stack->le_advertisements_interval_min = adv_int_min; 4976 hci_stack->le_advertisements_interval_max = adv_int_max; 4977 hci_stack->le_advertisements_type = adv_type; 4978 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4979 hci_stack->le_advertisements_channel_map = channel_map; 4980 hci_stack->le_advertisements_filter_policy = filter_policy; 4981 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 4982 6); 4983 4984 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4985 gap_advertisments_changed(); 4986 } 4987 4988 /** 4989 * @brief Enable/Disable Advertisements 4990 * @param enabled 4991 */ 4992 void gap_advertisements_enable(int enabled){ 4993 hci_stack->le_advertisements_enabled = enabled; 4994 if (enabled && !hci_stack->le_advertisements_active){ 4995 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4996 } 4997 if (!enabled && hci_stack->le_advertisements_active){ 4998 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4999 } 5000 hci_run(); 5001 } 5002 5003 #endif 5004 5005 void hci_le_set_own_address_type(uint8_t own_address_type){ 5006 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5007 if (own_address_type == hci_stack->le_own_addr_type) return; 5008 hci_stack->le_own_addr_type = own_address_type; 5009 5010 #ifdef ENABLE_LE_PERIPHERAL 5011 // update advertisement parameters, too 5012 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5013 gap_advertisments_changed(); 5014 #endif 5015 #ifdef ENABLE_LE_CENTRAL 5016 // note: we don't update scan parameters or modify ongoing connection attempts 5017 #endif 5018 } 5019 5020 #endif 5021 5022 uint8_t gap_disconnect(hci_con_handle_t handle){ 5023 hci_connection_t * conn = hci_connection_for_handle(handle); 5024 if (!conn){ 5025 hci_emit_disconnection_complete(handle, 0); 5026 return 0; 5027 } 5028 // ignore if already disconnected 5029 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5030 return 0; 5031 } 5032 conn->state = SEND_DISCONNECT; 5033 hci_run(); 5034 return 0; 5035 } 5036 5037 int gap_read_rssi(hci_con_handle_t con_handle){ 5038 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5039 if (hci_connection == NULL) return 0; 5040 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5041 hci_run(); 5042 return 1; 5043 } 5044 5045 /** 5046 * @brief Get connection type 5047 * @param con_handle 5048 * @result connection_type 5049 */ 5050 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5051 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5052 if (!conn) return GAP_CONNECTION_INVALID; 5053 switch (conn->address_type){ 5054 case BD_ADDR_TYPE_LE_PUBLIC: 5055 case BD_ADDR_TYPE_LE_RANDOM: 5056 return GAP_CONNECTION_LE; 5057 case BD_ADDR_TYPE_SCO: 5058 return GAP_CONNECTION_SCO; 5059 case BD_ADDR_TYPE_ACL: 5060 return GAP_CONNECTION_ACL; 5061 default: 5062 return GAP_CONNECTION_INVALID; 5063 } 5064 } 5065 5066 #ifdef ENABLE_BLE 5067 5068 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){ 5069 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5070 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5071 5072 conn->le_phy_update_all_phys = all_phys; 5073 conn->le_phy_update_tx_phys = tx_phys; 5074 conn->le_phy_update_rx_phys = rx_phys; 5075 conn->le_phy_update_phy_options = phy_options; 5076 5077 hci_run(); 5078 5079 return 0; 5080 } 5081 5082 #ifdef ENABLE_LE_CENTRAL 5083 /** 5084 * @brief Auto Connection Establishment - Start Connecting to device 5085 * @param address_typ 5086 * @param address 5087 * @returns 0 if ok 5088 */ 5089 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 5090 // check capacity 5091 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 5092 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 5093 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5094 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5095 entry->address_type = address_type; 5096 (void)memcpy(entry->address, address, 6); 5097 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5098 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5099 hci_run(); 5100 return 0; 5101 } 5102 5103 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5104 btstack_linked_list_iterator_t it; 5105 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5106 while (btstack_linked_list_iterator_has_next(&it)){ 5107 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5108 if (entry->address_type != address_type) continue; 5109 if (memcmp(entry->address, address, 6) != 0) continue; 5110 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5111 // remove from controller if already present 5112 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5113 continue; 5114 } 5115 // direclty remove entry from whitelist 5116 btstack_linked_list_iterator_remove(&it); 5117 btstack_memory_whitelist_entry_free(entry); 5118 } 5119 } 5120 5121 /** 5122 * @brief Auto Connection Establishment - Stop Connecting to device 5123 * @param address_typ 5124 * @param address 5125 * @returns 0 if ok 5126 */ 5127 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5128 hci_remove_from_whitelist(address_type, address); 5129 hci_run(); 5130 return 0; 5131 } 5132 5133 /** 5134 * @brief Auto Connection Establishment - Stop everything 5135 * @note Convenience function to stop all active auto connection attempts 5136 */ 5137 void gap_auto_connection_stop_all(void){ 5138 btstack_linked_list_iterator_t it; 5139 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5140 while (btstack_linked_list_iterator_has_next(&it)){ 5141 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5142 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5143 // remove from controller if already present 5144 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5145 continue; 5146 } 5147 // directly remove entry from whitelist 5148 btstack_linked_list_iterator_remove(&it); 5149 btstack_memory_whitelist_entry_free(entry); 5150 } 5151 hci_run(); 5152 } 5153 5154 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5155 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5156 if (!conn) return 0; 5157 return conn->le_connection_interval; 5158 } 5159 #endif 5160 #endif 5161 5162 #ifdef ENABLE_CLASSIC 5163 /** 5164 * @brief Set Extended Inquiry Response data 5165 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5166 * @note has to be done before stack starts up 5167 */ 5168 void gap_set_extended_inquiry_response(const uint8_t * data){ 5169 hci_stack->eir_data = data; 5170 } 5171 5172 /** 5173 * @brief Start GAP Classic Inquiry 5174 * @param duration in 1.28s units 5175 * @return 0 if ok 5176 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5177 */ 5178 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5179 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5180 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5181 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5182 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5183 } 5184 hci_stack->inquiry_state = duration_in_1280ms_units; 5185 hci_run(); 5186 return 0; 5187 } 5188 5189 /** 5190 * @brief Stop GAP Classic Inquiry 5191 * @returns 0 if ok 5192 */ 5193 int gap_inquiry_stop(void){ 5194 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5195 // emit inquiry complete event, before it even started 5196 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5197 hci_emit_event(event, sizeof(event), 1); 5198 return 0; 5199 } 5200 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5201 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5202 hci_run(); 5203 return 0; 5204 } 5205 5206 5207 /** 5208 * @brief Remote Name Request 5209 * @param addr 5210 * @param page_scan_repetition_mode 5211 * @param clock_offset only used when bit 15 is set 5212 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5213 */ 5214 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5215 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5216 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5217 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5218 hci_stack->remote_name_clock_offset = clock_offset; 5219 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5220 hci_run(); 5221 return 0; 5222 } 5223 5224 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5225 hci_stack->gap_pairing_state = state; 5226 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5227 hci_run(); 5228 return 0; 5229 } 5230 5231 /** 5232 * @brief Legacy Pairing Pin Code Response 5233 * @param addr 5234 * @param pin 5235 * @return 0 if ok 5236 */ 5237 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5238 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5239 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5240 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5241 } 5242 5243 /** 5244 * @brief Abort Legacy Pairing 5245 * @param addr 5246 * @param pin 5247 * @return 0 if ok 5248 */ 5249 int gap_pin_code_negative(bd_addr_t addr){ 5250 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5251 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5252 } 5253 5254 /** 5255 * @brief SSP Passkey Response 5256 * @param addr 5257 * @param passkey 5258 * @return 0 if ok 5259 */ 5260 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5261 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5262 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5263 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5264 } 5265 5266 /** 5267 * @brief Abort SSP Passkey Entry/Pairing 5268 * @param addr 5269 * @param pin 5270 * @return 0 if ok 5271 */ 5272 int gap_ssp_passkey_negative(bd_addr_t addr){ 5273 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5274 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5275 } 5276 5277 /** 5278 * @brief Accept SSP Numeric Comparison 5279 * @param addr 5280 * @param passkey 5281 * @return 0 if ok 5282 */ 5283 int gap_ssp_confirmation_response(bd_addr_t addr){ 5284 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5285 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5286 } 5287 5288 /** 5289 * @brief Abort SSP Numeric Comparison/Pairing 5290 * @param addr 5291 * @param pin 5292 * @return 0 if ok 5293 */ 5294 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5295 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5296 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5297 } 5298 5299 /** 5300 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5301 * @param inquiry_mode see bluetooth_defines.h 5302 */ 5303 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5304 hci_stack->inquiry_mode = mode; 5305 } 5306 5307 /** 5308 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5309 */ 5310 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5311 hci_stack->sco_voice_setting = voice_setting; 5312 } 5313 5314 /** 5315 * @brief Get SCO Voice Setting 5316 * @return current voice setting 5317 */ 5318 uint16_t hci_get_sco_voice_setting(void){ 5319 return hci_stack->sco_voice_setting; 5320 } 5321 5322 static int hci_have_usb_transport(void){ 5323 if (!hci_stack->hci_transport) return 0; 5324 const char * transport_name = hci_stack->hci_transport->name; 5325 if (!transport_name) return 0; 5326 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5327 } 5328 5329 /** @brief Get SCO packet length for current SCO Voice setting 5330 * @note Using SCO packets of the exact length is required for USB transfer 5331 * @return Length of SCO packets in bytes (not audio frames) 5332 */ 5333 int hci_get_sco_packet_length(void){ 5334 int sco_packet_length = 0; 5335 5336 #ifdef ENABLE_SCO_OVER_HCI 5337 5338 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5339 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5340 5341 if (hci_have_usb_transport()){ 5342 // see Core Spec for H2 USB Transfer. 5343 // 3 byte SCO header + 24 bytes per connection 5344 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5345 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5346 } else { 5347 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5348 sco_packet_length = 3 + 60 * multiplier; 5349 // assert that it still fits inside an SCO buffer 5350 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5351 sco_packet_length = 3 + 60; 5352 } 5353 } 5354 #endif 5355 return sco_packet_length; 5356 } 5357 5358 /** 5359 * @brief Sets the master/slave policy 5360 * @param policy (0: attempt to become master, 1: let connecting device decide) 5361 */ 5362 void hci_set_master_slave_policy(uint8_t policy){ 5363 hci_stack->master_slave_policy = policy; 5364 } 5365 5366 #endif 5367 5368 HCI_STATE hci_get_state(void){ 5369 return hci_stack->state; 5370 } 5371 5372 #ifdef ENABLE_CLASSIC 5373 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5374 hci_stack->gap_classic_accept_callback = accept_callback; 5375 } 5376 #endif 5377 5378 /** 5379 * @brief Set callback for Bluetooth Hardware Error 5380 */ 5381 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5382 hci_stack->hardware_error_callback = fn; 5383 } 5384 5385 void hci_disconnect_all(void){ 5386 btstack_linked_list_iterator_t it; 5387 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5388 while (btstack_linked_list_iterator_has_next(&it)){ 5389 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5390 if (con->state == SENT_DISCONNECT) continue; 5391 con->state = SEND_DISCONNECT; 5392 } 5393 hci_run(); 5394 } 5395 5396 uint16_t hci_get_manufacturer(void){ 5397 return hci_stack->manufacturer; 5398 } 5399 5400 #ifdef ENABLE_BLE 5401 5402 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5403 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5404 if (!hci_con) return NULL; 5405 return &hci_con->sm_connection; 5406 } 5407 5408 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5409 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5410 5411 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5412 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5413 if (hci_connection == NULL) return 0; 5414 if (hci_is_le_connection(hci_connection)){ 5415 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5416 if (sm_conn->sm_connection_encrypted) { 5417 return sm_conn->sm_actual_encryption_key_size; 5418 } 5419 } 5420 #ifdef ENABLE_CLASSIC 5421 else { 5422 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5423 return hci_connection->encryption_key_size; 5424 } 5425 } 5426 #endif 5427 return 0; 5428 } 5429 5430 int gap_authenticated(hci_con_handle_t con_handle){ 5431 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5432 if (hci_connection == NULL) return 0; 5433 5434 switch (hci_connection->address_type){ 5435 case BD_ADDR_TYPE_LE_PUBLIC: 5436 case BD_ADDR_TYPE_LE_RANDOM: 5437 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5438 return hci_connection->sm_connection.sm_connection_authenticated; 5439 #ifdef ENABLE_CLASSIC 5440 case BD_ADDR_TYPE_SCO: 5441 case BD_ADDR_TYPE_ACL: 5442 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5443 #endif 5444 default: 5445 return 0; 5446 } 5447 } 5448 5449 int gap_secure_connection(hci_con_handle_t con_handle){ 5450 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5451 if (hci_connection == NULL) return 0; 5452 5453 switch (hci_connection->address_type){ 5454 case BD_ADDR_TYPE_LE_PUBLIC: 5455 case BD_ADDR_TYPE_LE_RANDOM: 5456 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5457 return hci_connection->sm_connection.sm_connection_sc; 5458 #ifdef ENABLE_CLASSIC 5459 case BD_ADDR_TYPE_SCO: 5460 case BD_ADDR_TYPE_ACL: 5461 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5462 #endif 5463 default: 5464 return 0; 5465 } 5466 } 5467 5468 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5469 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5470 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5471 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5472 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5473 return sm_conn->sm_connection_authorization_state; 5474 } 5475 #endif 5476 5477 #ifdef ENABLE_CLASSIC 5478 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){ 5479 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5480 if (!conn) return GAP_CONNECTION_INVALID; 5481 conn->sniff_min_interval = sniff_min_interval; 5482 conn->sniff_max_interval = sniff_max_interval; 5483 conn->sniff_attempt = sniff_attempt; 5484 conn->sniff_timeout = sniff_timeout; 5485 hci_run(); 5486 return 0; 5487 } 5488 5489 /** 5490 * @brief Exit Sniff mode 5491 * @param con_handle 5492 @ @return 0 if ok 5493 */ 5494 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5495 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5496 if (!conn) return GAP_CONNECTION_INVALID; 5497 conn->sniff_min_interval = 0xffff; 5498 hci_run(); 5499 return 0; 5500 } 5501 #endif 5502 5503 void hci_halting_defer(void){ 5504 if (hci_stack->state != HCI_STATE_HALTING) return; 5505 switch (hci_stack->substate){ 5506 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5507 case HCI_HALTING_CLOSE: 5508 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5509 break; 5510 default: 5511 break; 5512 } 5513 } 5514 5515 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5516 void hci_setup_test_connections_fuzz(void){ 5517 hci_connection_t * conn; 5518 5519 // default address: 66:55:44:33:00:01 5520 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5521 5522 // setup Controller info 5523 hci_stack->num_cmd_packets = 255; 5524 hci_stack->acl_packets_total_num = 255; 5525 5526 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5527 addr[5] = 0x01; 5528 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5529 conn->con_handle = addr[5]; 5530 conn->role = HCI_ROLE_SLAVE; 5531 conn->state = RECEIVED_CONNECTION_REQUEST; 5532 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5533 5534 // setup incoming Classic SCO connection with con handle 0x0002 5535 addr[5] = 0x02; 5536 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5537 conn->con_handle = addr[5]; 5538 conn->role = HCI_ROLE_SLAVE; 5539 conn->state = RECEIVED_CONNECTION_REQUEST; 5540 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5541 5542 // setup ready Classic ACL connection with con handle 0x0003 5543 addr[5] = 0x03; 5544 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5545 conn->con_handle = addr[5]; 5546 conn->role = HCI_ROLE_SLAVE; 5547 conn->state = OPEN; 5548 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5549 5550 // setup ready Classic SCO connection with con handle 0x0004 5551 addr[5] = 0x04; 5552 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5553 conn->con_handle = addr[5]; 5554 conn->role = HCI_ROLE_SLAVE; 5555 conn->state = OPEN; 5556 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5557 5558 // setup ready LE ACL connection with con handle 0x005 and public address 5559 addr[5] = 0x05; 5560 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5561 conn->con_handle = addr[5]; 5562 conn->role = HCI_ROLE_SLAVE; 5563 conn->state = OPEN; 5564 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5565 } 5566 5567 void hci_free_connections_fuzz(void){ 5568 btstack_linked_list_iterator_t it; 5569 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5570 while (btstack_linked_list_iterator_has_next(&it)){ 5571 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5572 btstack_linked_list_iterator_remove(&it); 5573 btstack_memory_hci_connection_free(con); 5574 } 5575 } 5576 void hci_simulate_working_fuzz(void){ 5577 hci_init_done(); 5578 hci_stack->num_cmd_packets = 255; 5579 } 5580 #endif 5581