1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 98 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 99 #define HCI_RESET_RESEND_TIMEOUT_MS 200 100 #endif 101 102 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 103 #ifndef GAP_INQUIRY_MAX_NAME_LEN 104 #define GAP_INQUIRY_MAX_NAME_LEN 32 105 #endif 106 107 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 108 #define GAP_INQUIRY_DURATION_MIN 0x01 109 #define GAP_INQUIRY_DURATION_MAX 0x30 110 #define GAP_INQUIRY_STATE_ACTIVE 0x80 111 #define GAP_INQUIRY_STATE_IDLE 0 112 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 113 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 114 115 // GAP Remote Name Request 116 #define GAP_REMOTE_NAME_STATE_IDLE 0 117 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 118 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 119 120 // GAP Pairing 121 #define GAP_PAIRING_STATE_IDLE 0 122 #define GAP_PAIRING_STATE_SEND_PIN 1 123 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 124 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 125 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 126 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 127 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 128 129 130 // prototypes 131 #ifdef ENABLE_CLASSIC 132 static void hci_update_scan_enable(void); 133 static void hci_emit_discoverable_enabled(uint8_t enabled); 134 static int hci_local_ssp_activated(void); 135 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 136 static bool hci_ssp_supported(hci_connection_t * connection); 137 static void hci_notify_if_sco_can_send_now(void); 138 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 139 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 140 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 141 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 142 static void hci_connection_timestamp(hci_connection_t *connection); 143 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 144 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 145 #endif 146 147 static int hci_power_control_on(void); 148 static void hci_power_control_off(void); 149 static void hci_state_reset(void); 150 static void hci_emit_transport_packet_sent(void); 151 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 152 static void hci_emit_nr_connections_changed(void); 153 static void hci_emit_hci_open_failed(void); 154 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 155 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 156 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 157 static void hci_run(void); 158 static int hci_is_le_connection(hci_connection_t * connection); 159 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 160 161 #ifdef ENABLE_CLASSIC 162 static int hci_have_usb_transport(void); 163 #endif 164 165 #ifdef ENABLE_BLE 166 #ifdef ENABLE_LE_CENTRAL 167 // called from test/ble_client/advertising_data_parser.c 168 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 169 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 170 static hci_connection_t * gap_get_outgoing_connection(void); 171 #endif 172 #endif 173 174 // the STACK is here 175 #ifndef HAVE_MALLOC 176 static hci_stack_t hci_stack_static; 177 #endif 178 static hci_stack_t * hci_stack = NULL; 179 180 #ifdef ENABLE_CLASSIC 181 // default name 182 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 183 184 // test helper 185 static uint8_t disable_l2cap_timeouts = 0; 186 #endif 187 188 /** 189 * create connection for given address 190 * 191 * @return connection OR NULL, if no memory left 192 */ 193 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 194 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 195 hci_connection_t * conn = btstack_memory_hci_connection_get(); 196 if (!conn) return NULL; 197 bd_addr_copy(conn->address, addr); 198 conn->address_type = addr_type; 199 conn->con_handle = 0xffff; 200 conn->authentication_flags = AUTH_FLAGS_NONE; 201 conn->bonding_flags = 0; 202 conn->requested_security_level = LEVEL_0; 203 #ifdef ENABLE_CLASSIC 204 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 205 btstack_run_loop_set_timer_context(&conn->timeout, conn); 206 hci_connection_timestamp(conn); 207 #endif 208 conn->acl_recombination_length = 0; 209 conn->acl_recombination_pos = 0; 210 conn->num_packets_sent = 0; 211 212 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 213 #ifdef ENABLE_BLE 214 conn->le_phy_update_all_phys = 0xff; 215 #endif 216 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 217 conn->le_max_tx_octets = 27; 218 #endif 219 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 220 return conn; 221 } 222 223 224 /** 225 * get le connection parameter range 226 * 227 * @return le connection parameter range struct 228 */ 229 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 230 *range = hci_stack->le_connection_parameter_range; 231 } 232 233 /** 234 * set le connection parameter range 235 * 236 */ 237 238 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 239 hci_stack->le_connection_parameter_range = *range; 240 } 241 242 /** 243 * @brief Test if connection parameters are inside in existing rage 244 * @param conn_interval_min (unit: 1.25ms) 245 * @param conn_interval_max (unit: 1.25ms) 246 * @param conn_latency 247 * @param supervision_timeout (unit: 10ms) 248 * @returns 1 if included 249 */ 250 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 251 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 252 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 253 254 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 255 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 256 257 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 258 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 259 260 return 1; 261 } 262 263 /** 264 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 265 * @note: default: 1 266 * @param max_peripheral_connections 267 */ 268 #ifdef ENABLE_LE_PERIPHERAL 269 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 270 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 271 } 272 #endif 273 274 /** 275 * get hci connections iterator 276 * 277 * @return hci connections iterator 278 */ 279 280 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 281 btstack_linked_list_iterator_init(it, &hci_stack->connections); 282 } 283 284 /** 285 * get connection for a given handle 286 * 287 * @return connection OR NULL, if not found 288 */ 289 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 290 btstack_linked_list_iterator_t it; 291 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 292 while (btstack_linked_list_iterator_has_next(&it)){ 293 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 294 if ( item->con_handle == con_handle ) { 295 return item; 296 } 297 } 298 return NULL; 299 } 300 301 /** 302 * get connection for given address 303 * 304 * @return connection OR NULL, if not found 305 */ 306 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 307 btstack_linked_list_iterator_t it; 308 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 309 while (btstack_linked_list_iterator_has_next(&it)){ 310 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 311 if (connection->address_type != addr_type) continue; 312 if (memcmp(addr, connection->address, 6) != 0) continue; 313 return connection; 314 } 315 return NULL; 316 } 317 318 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 319 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 320 } 321 322 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 323 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 324 } 325 326 #ifdef ENABLE_CLASSIC 327 328 #ifdef ENABLE_SCO_OVER_HCI 329 static int hci_number_sco_connections(void){ 330 int connections = 0; 331 btstack_linked_list_iterator_t it; 332 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 333 while (btstack_linked_list_iterator_has_next(&it)){ 334 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 335 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 336 connections++; 337 } 338 return connections; 339 } 340 #endif 341 342 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 343 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 344 #ifdef HAVE_EMBEDDED_TICK 345 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 346 // connections might be timed out 347 hci_emit_l2cap_check_timeout(connection); 348 } 349 #else 350 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 351 // connections might be timed out 352 hci_emit_l2cap_check_timeout(connection); 353 } 354 #endif 355 } 356 357 static void hci_connection_timestamp(hci_connection_t *connection){ 358 #ifdef HAVE_EMBEDDED_TICK 359 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 360 #else 361 connection->timestamp = btstack_run_loop_get_time_ms(); 362 #endif 363 } 364 365 /** 366 * add authentication flags and reset timer 367 * @note: assumes classic connection 368 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 369 */ 370 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 371 bd_addr_t addr; 372 reverse_bd_addr(bd_addr, addr); 373 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 374 if (conn) { 375 connectionSetAuthenticationFlags(conn, flags); 376 hci_connection_timestamp(conn); 377 } 378 } 379 380 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 381 hci_connection_t * conn = hci_connection_for_handle(handle); 382 if (!conn) return 0; 383 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 384 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 385 return 0; 386 } 387 388 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 389 if (!hci_stack->link_key_db) return; 390 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 391 hci_stack->link_key_db->delete_link_key(addr); 392 } 393 394 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 395 if (!hci_stack->link_key_db) return; 396 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 397 hci_stack->link_key_db->put_link_key(addr, link_key, type); 398 } 399 400 void gap_delete_all_link_keys(void){ 401 bd_addr_t addr; 402 link_key_t link_key; 403 link_key_type_t type; 404 btstack_link_key_iterator_t it; 405 int ok = gap_link_key_iterator_init(&it); 406 if (!ok) { 407 log_error("could not initialize iterator"); 408 return; 409 } 410 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 411 gap_drop_link_key_for_bd_addr(addr); 412 } 413 gap_link_key_iterator_done(&it); 414 } 415 416 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 417 if (!hci_stack->link_key_db) return 0; 418 if (!hci_stack->link_key_db->iterator_init) return 0; 419 return hci_stack->link_key_db->iterator_init(it); 420 } 421 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 422 if (!hci_stack->link_key_db) return 0; 423 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 424 } 425 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 426 if (!hci_stack->link_key_db) return; 427 hci_stack->link_key_db->iterator_done(it); 428 } 429 #endif 430 431 static int hci_is_le_connection(hci_connection_t * connection){ 432 switch (connection->address_type){ 433 case BD_ADDR_TYPE_LE_PUBLIC: 434 case BD_ADDR_TYPE_LE_RANDOM: 435 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 436 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 437 return 1; 438 default: 439 return 0; 440 } 441 } 442 443 /** 444 * count connections 445 */ 446 static int nr_hci_connections(void){ 447 int count = 0; 448 btstack_linked_item_t *it; 449 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 450 count++; 451 } 452 return count; 453 } 454 455 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 456 457 unsigned int num_packets_sent_classic = 0; 458 unsigned int num_packets_sent_le = 0; 459 460 btstack_linked_item_t *it; 461 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 462 hci_connection_t * connection = (hci_connection_t *) it; 463 if (hci_is_le_connection(connection)){ 464 num_packets_sent_le += connection->num_packets_sent; 465 } 466 if (connection->address_type == BD_ADDR_TYPE_ACL){ 467 num_packets_sent_classic += connection->num_packets_sent; 468 } 469 } 470 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 471 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 472 int free_slots_le = 0; 473 474 if (free_slots_classic < 0){ 475 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 476 return 0; 477 } 478 479 if (hci_stack->le_acl_packets_total_num){ 480 // if we have LE slots, they are used 481 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 482 if (free_slots_le < 0){ 483 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 484 return 0; 485 } 486 } else { 487 // otherwise, classic slots are used for LE, too 488 free_slots_classic -= num_packets_sent_le; 489 if (free_slots_classic < 0){ 490 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 491 return 0; 492 } 493 } 494 495 switch (address_type){ 496 case BD_ADDR_TYPE_UNKNOWN: 497 log_error("hci_number_free_acl_slots: unknown address type"); 498 return 0; 499 500 case BD_ADDR_TYPE_ACL: 501 return free_slots_classic; 502 503 default: 504 if (hci_stack->le_acl_packets_total_num){ 505 return free_slots_le; 506 } 507 return free_slots_classic; 508 } 509 } 510 511 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 512 // get connection type 513 hci_connection_t * connection = hci_connection_for_handle(con_handle); 514 if (!connection){ 515 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 516 return 0; 517 } 518 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 519 } 520 521 #ifdef ENABLE_CLASSIC 522 static int hci_number_free_sco_slots(void){ 523 unsigned int num_sco_packets_sent = 0; 524 btstack_linked_item_t *it; 525 if (hci_stack->synchronous_flow_control_enabled){ 526 // explicit flow control 527 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 528 hci_connection_t * connection = (hci_connection_t *) it; 529 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 530 num_sco_packets_sent += connection->num_packets_sent; 531 } 532 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 533 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 534 return 0; 535 } 536 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 537 } else { 538 // implicit flow control -- TODO 539 int num_ready = 0; 540 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 541 hci_connection_t * connection = (hci_connection_t *) it; 542 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 543 if (connection->sco_tx_ready == 0) continue; 544 num_ready++; 545 } 546 return num_ready; 547 } 548 } 549 #endif 550 551 // only used to send HCI Host Number Completed Packets 552 static int hci_can_send_comand_packet_transport(void){ 553 if (hci_stack->hci_packet_buffer_reserved) return 0; 554 555 // check for async hci transport implementations 556 if (hci_stack->hci_transport->can_send_packet_now){ 557 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 558 return 0; 559 } 560 } 561 return 1; 562 } 563 564 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 565 int hci_can_send_command_packet_now(void){ 566 if (hci_can_send_comand_packet_transport() == 0) return 0; 567 return hci_stack->num_cmd_packets > 0; 568 } 569 570 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 571 // check for async hci transport implementations 572 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 573 return hci_stack->hci_transport->can_send_packet_now(packet_type); 574 } 575 576 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 577 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 578 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 579 } 580 581 int hci_can_send_acl_le_packet_now(void){ 582 if (hci_stack->hci_packet_buffer_reserved) return 0; 583 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 584 } 585 586 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 587 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 588 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 589 } 590 591 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 592 if (hci_stack->hci_packet_buffer_reserved) return 0; 593 return hci_can_send_prepared_acl_packet_now(con_handle); 594 } 595 596 #ifdef ENABLE_CLASSIC 597 int hci_can_send_acl_classic_packet_now(void){ 598 if (hci_stack->hci_packet_buffer_reserved) return 0; 599 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 600 } 601 602 int hci_can_send_prepared_sco_packet_now(void){ 603 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 604 if (hci_have_usb_transport()){ 605 return hci_stack->sco_can_send_now; 606 } else { 607 return hci_number_free_sco_slots() > 0; 608 } 609 } 610 611 int hci_can_send_sco_packet_now(void){ 612 if (hci_stack->hci_packet_buffer_reserved) return 0; 613 return hci_can_send_prepared_sco_packet_now(); 614 } 615 616 void hci_request_sco_can_send_now_event(void){ 617 hci_stack->sco_waiting_for_can_send_now = 1; 618 hci_notify_if_sco_can_send_now(); 619 } 620 #endif 621 622 // used for internal checks in l2cap.c 623 int hci_is_packet_buffer_reserved(void){ 624 return hci_stack->hci_packet_buffer_reserved; 625 } 626 627 // reserves outgoing packet buffer. @returns 1 if successful 628 int hci_reserve_packet_buffer(void){ 629 if (hci_stack->hci_packet_buffer_reserved) { 630 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 631 return 0; 632 } 633 hci_stack->hci_packet_buffer_reserved = 1; 634 return 1; 635 } 636 637 void hci_release_packet_buffer(void){ 638 hci_stack->hci_packet_buffer_reserved = 0; 639 } 640 641 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 642 static int hci_transport_synchronous(void){ 643 return hci_stack->hci_transport->can_send_packet_now == NULL; 644 } 645 646 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 647 648 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 649 650 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 651 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 652 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0)){ 653 max_acl_data_packet_length = hci_stack->le_data_packets_length; 654 } 655 656 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 657 if (hci_is_le_connection(connection)){ 658 max_acl_data_packet_length = connection->le_max_tx_octets; 659 } 660 #endif 661 662 log_debug("hci_send_acl_packet_fragments entered"); 663 664 int err; 665 // multiple packets could be send on a synchronous HCI transport 666 while (true){ 667 668 log_debug("hci_send_acl_packet_fragments loop entered"); 669 670 // get current data 671 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 672 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 673 int more_fragments = 0; 674 675 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 676 if (current_acl_data_packet_length > max_acl_data_packet_length){ 677 more_fragments = 1; 678 current_acl_data_packet_length = max_acl_data_packet_length; 679 } 680 681 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 682 if (acl_header_pos > 0){ 683 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 684 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 685 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 686 } 687 688 // update header len 689 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 690 691 // count packet 692 connection->num_packets_sent++; 693 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 694 695 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 696 if (more_fragments){ 697 // update start of next fragment to send 698 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 699 } else { 700 // done 701 hci_stack->acl_fragmentation_pos = 0; 702 hci_stack->acl_fragmentation_total_size = 0; 703 } 704 705 // send packet 706 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 707 const int size = current_acl_data_packet_length + 4; 708 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 709 hci_stack->acl_fragmentation_tx_active = 1; 710 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 711 712 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 713 714 // done yet? 715 if (!more_fragments) break; 716 717 // can send more? 718 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 719 } 720 721 log_debug("hci_send_acl_packet_fragments loop over"); 722 723 // release buffer now for synchronous transport 724 if (hci_transport_synchronous()){ 725 hci_stack->acl_fragmentation_tx_active = 0; 726 hci_release_packet_buffer(); 727 hci_emit_transport_packet_sent(); 728 } 729 730 return err; 731 } 732 733 // pre: caller has reserved the packet buffer 734 int hci_send_acl_packet_buffer(int size){ 735 736 // log_info("hci_send_acl_packet_buffer size %u", size); 737 738 if (!hci_stack->hci_packet_buffer_reserved) { 739 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 740 return 0; 741 } 742 743 uint8_t * packet = hci_stack->hci_packet_buffer; 744 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 745 746 // check for free places on Bluetooth module 747 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 748 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 749 hci_release_packet_buffer(); 750 hci_emit_transport_packet_sent(); 751 return BTSTACK_ACL_BUFFERS_FULL; 752 } 753 754 hci_connection_t *connection = hci_connection_for_handle( con_handle); 755 if (!connection) { 756 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 757 hci_release_packet_buffer(); 758 hci_emit_transport_packet_sent(); 759 return 0; 760 } 761 762 #ifdef ENABLE_CLASSIC 763 hci_connection_timestamp(connection); 764 #endif 765 766 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 767 768 // setup data 769 hci_stack->acl_fragmentation_total_size = size; 770 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 771 772 return hci_send_acl_packet_fragments(connection); 773 } 774 775 #ifdef ENABLE_CLASSIC 776 // pre: caller has reserved the packet buffer 777 int hci_send_sco_packet_buffer(int size){ 778 779 // log_info("hci_send_acl_packet_buffer size %u", size); 780 781 if (!hci_stack->hci_packet_buffer_reserved) { 782 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 783 return 0; 784 } 785 786 uint8_t * packet = hci_stack->hci_packet_buffer; 787 788 // skip checks in loopback mode 789 if (!hci_stack->loopback_mode){ 790 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 791 792 // check for free places on Bluetooth module 793 if (!hci_can_send_prepared_sco_packet_now()) { 794 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 795 hci_release_packet_buffer(); 796 hci_emit_transport_packet_sent(); 797 return BTSTACK_ACL_BUFFERS_FULL; 798 } 799 800 // track send packet in connection struct 801 hci_connection_t *connection = hci_connection_for_handle( con_handle); 802 if (!connection) { 803 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 804 hci_release_packet_buffer(); 805 hci_emit_transport_packet_sent(); 806 return 0; 807 } 808 809 if (hci_have_usb_transport()){ 810 // token used 811 hci_stack->sco_can_send_now = 0; 812 } else { 813 if (hci_stack->synchronous_flow_control_enabled){ 814 connection->num_packets_sent++; 815 } else { 816 connection->sco_tx_ready--; 817 } 818 } 819 } 820 821 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 822 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 823 824 if (hci_transport_synchronous()){ 825 hci_release_packet_buffer(); 826 hci_emit_transport_packet_sent(); 827 } 828 829 return err; 830 } 831 #endif 832 833 static void acl_handler(uint8_t *packet, int size){ 834 835 // log_info("acl_handler: size %u", size); 836 837 // get info 838 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 839 hci_connection_t *conn = hci_connection_for_handle(con_handle); 840 uint8_t acl_flags = READ_ACL_FLAGS(packet); 841 uint16_t acl_length = READ_ACL_LENGTH(packet); 842 843 // ignore non-registered handle 844 if (!conn){ 845 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 846 return; 847 } 848 849 // assert packet is complete 850 if ((acl_length + 4) != size){ 851 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 852 return; 853 } 854 855 #ifdef ENABLE_CLASSIC 856 // update idle timestamp 857 hci_connection_timestamp(conn); 858 #endif 859 860 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 861 hci_stack->host_completed_packets = 1; 862 conn->num_packets_completed++; 863 #endif 864 865 // handle different packet types 866 switch (acl_flags & 0x03) { 867 868 case 0x01: // continuation fragment 869 870 // sanity checks 871 if (conn->acl_recombination_pos == 0) { 872 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 873 return; 874 } 875 if ((conn->acl_recombination_pos + acl_length) > (4 + HCI_ACL_BUFFER_SIZE)){ 876 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 877 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 878 conn->acl_recombination_pos = 0; 879 return; 880 } 881 882 // append fragment payload (header already stored) 883 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 884 &packet[4], acl_length); 885 conn->acl_recombination_pos += acl_length; 886 887 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 888 // conn->acl_recombination_pos, conn->acl_recombination_length); 889 890 // forward complete L2CAP packet if complete. 891 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4 + 4)){ // pos already incl. ACL header 892 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 893 // reset recombination buffer 894 conn->acl_recombination_length = 0; 895 conn->acl_recombination_pos = 0; 896 } 897 break; 898 899 case 0x02: { // first fragment 900 901 // sanity check 902 if (conn->acl_recombination_pos) { 903 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 904 conn->acl_recombination_pos = 0; 905 } 906 907 // peek into L2CAP packet! 908 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 909 910 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 911 912 // compare fragment size to L2CAP packet size 913 if (acl_length >= (l2cap_length + 4)){ 914 // forward fragment as L2CAP packet 915 hci_emit_acl_packet(packet, acl_length + 4); 916 } else { 917 918 if (acl_length > HCI_ACL_BUFFER_SIZE){ 919 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 920 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 921 return; 922 } 923 924 // store first fragment and tweak acl length for complete package 925 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 926 packet, acl_length + 4); 927 conn->acl_recombination_pos = acl_length + 4; 928 conn->acl_recombination_length = l2cap_length; 929 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 930 } 931 break; 932 933 } 934 default: 935 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 936 return; 937 } 938 939 // execute main loop 940 hci_run(); 941 } 942 943 static void hci_shutdown_connection(hci_connection_t *conn){ 944 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 945 946 #ifdef ENABLE_CLASSIC 947 #ifdef ENABLE_SCO_OVER_HCI 948 int addr_type = conn->address_type; 949 #endif 950 #endif 951 952 btstack_run_loop_remove_timer(&conn->timeout); 953 954 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 955 btstack_memory_hci_connection_free( conn ); 956 957 // now it's gone 958 hci_emit_nr_connections_changed(); 959 960 #ifdef ENABLE_CLASSIC 961 #ifdef ENABLE_SCO_OVER_HCI 962 // update SCO 963 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 964 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 965 } 966 #endif 967 #endif 968 } 969 970 #ifdef ENABLE_CLASSIC 971 972 static const uint16_t packet_type_sizes[] = { 973 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 974 HCI_ACL_DH1_SIZE, 0, 0, 0, 975 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 976 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 977 }; 978 static const uint8_t packet_type_feature_requirement_bit[] = { 979 0, // 3 slot packets 980 1, // 5 slot packets 981 25, // EDR 2 mpbs 982 26, // EDR 3 mbps 983 39, // 3 slot EDR packts 984 40, // 5 slot EDR packet 985 }; 986 static const uint16_t packet_type_feature_packet_mask[] = { 987 0x0f00, // 3 slot packets 988 0xf000, // 5 slot packets 989 0x1102, // EDR 2 mpbs 990 0x2204, // EDR 3 mbps 991 0x0300, // 3 slot EDR packts 992 0x3000, // 5 slot EDR packet 993 }; 994 995 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 996 // enable packet types based on size 997 uint16_t packet_types = 0; 998 unsigned int i; 999 for (i=0;i<16;i++){ 1000 if (packet_type_sizes[i] == 0) continue; 1001 if (packet_type_sizes[i] <= buffer_size){ 1002 packet_types |= 1 << i; 1003 } 1004 } 1005 // disable packet types due to missing local supported features 1006 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1007 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1008 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1009 if (feature_set) continue; 1010 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1011 packet_types &= ~packet_type_feature_packet_mask[i]; 1012 } 1013 // flip bits for "may not be used" 1014 packet_types ^= 0x3306; 1015 return packet_types; 1016 } 1017 1018 uint16_t hci_usable_acl_packet_types(void){ 1019 return hci_stack->packet_types; 1020 } 1021 #endif 1022 1023 uint8_t* hci_get_outgoing_packet_buffer(void){ 1024 // hci packet buffer is >= acl data packet length 1025 return hci_stack->hci_packet_buffer; 1026 } 1027 1028 uint16_t hci_max_acl_data_packet_length(void){ 1029 return hci_stack->acl_data_packet_length; 1030 } 1031 1032 #ifdef ENABLE_CLASSIC 1033 int hci_extended_sco_link_supported(void){ 1034 // No. 31, byte 3, bit 7 1035 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1036 } 1037 #endif 1038 1039 int hci_non_flushable_packet_boundary_flag_supported(void){ 1040 // No. 54, byte 6, bit 6 1041 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1042 } 1043 1044 static int gap_ssp_supported(void){ 1045 // No. 51, byte 6, bit 3 1046 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1047 } 1048 1049 static int hci_classic_supported(void){ 1050 #ifdef ENABLE_CLASSIC 1051 // No. 37, byte 4, bit 5, = No BR/EDR Support 1052 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1053 #else 1054 return 0; 1055 #endif 1056 } 1057 1058 static int hci_le_supported(void){ 1059 #ifdef ENABLE_BLE 1060 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1061 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1062 #else 1063 return 0; 1064 #endif 1065 } 1066 1067 #ifdef ENABLE_BLE 1068 1069 /** 1070 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1071 */ 1072 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1073 *addr_type = hci_stack->le_own_addr_type; 1074 if (hci_stack->le_own_addr_type){ 1075 (void)memcpy(addr, hci_stack->le_random_address, 6); 1076 } else { 1077 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1078 } 1079 } 1080 1081 #ifdef ENABLE_LE_CENTRAL 1082 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1083 1084 int offset = 3; 1085 int num_reports = packet[offset]; 1086 offset += 1; 1087 1088 int i; 1089 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1090 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1091 for (i=0; (i<num_reports) && (offset < size);i++){ 1092 // sanity checks on data_length: 1093 uint8_t data_length = packet[offset + 8]; 1094 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1095 if ((offset + 9 + data_length + 1) > size) return; 1096 // setup event 1097 uint8_t event_size = 10 + data_length; 1098 int pos = 0; 1099 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1100 event[pos++] = event_size; 1101 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1102 offset += 8; 1103 pos += 8; 1104 event[pos++] = packet[offset + 1 + data_length]; // rssi 1105 event[pos++] = data_length; 1106 offset++; 1107 (void)memcpy(&event[pos], &packet[offset], data_length); 1108 pos += data_length; 1109 offset += data_length + 1; // rssi 1110 hci_emit_event(event, pos, 1); 1111 } 1112 } 1113 #endif 1114 #endif 1115 1116 #ifdef ENABLE_BLE 1117 #ifdef ENABLE_LE_PERIPHERAL 1118 static void hci_reenable_advertisements_if_needed(void){ 1119 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1120 // get number of active le slave connections 1121 int num_slave_connections = 0; 1122 btstack_linked_list_iterator_t it; 1123 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1124 while (btstack_linked_list_iterator_has_next(&it)){ 1125 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1126 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1127 if (con->state != OPEN) continue; 1128 if (con->role != HCI_ROLE_SLAVE) continue; 1129 if (!hci_is_le_connection(con)) continue; 1130 num_slave_connections++; 1131 } 1132 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1133 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1134 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1135 } 1136 } 1137 } 1138 #endif 1139 #endif 1140 1141 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1142 1143 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1144 if (!hci_stack->config) return 0; 1145 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1146 // Limit baud rate for Broadcom chipsets to 3 mbps 1147 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1148 baud_rate = 3000000; 1149 } 1150 return baud_rate; 1151 } 1152 1153 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1154 UNUSED(ds); 1155 1156 switch (hci_stack->substate){ 1157 case HCI_INIT_W4_SEND_RESET: 1158 log_info("Resend HCI Reset"); 1159 hci_stack->substate = HCI_INIT_SEND_RESET; 1160 hci_stack->num_cmd_packets = 1; 1161 hci_run(); 1162 break; 1163 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1164 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1165 if (hci_stack->hci_transport->reset_link){ 1166 hci_stack->hci_transport->reset_link(); 1167 } 1168 1169 /* fall through */ 1170 1171 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1172 log_info("Resend HCI Reset - CSR Warm Boot"); 1173 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1174 hci_stack->num_cmd_packets = 1; 1175 hci_run(); 1176 break; 1177 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1178 if (hci_stack->hci_transport->set_baudrate){ 1179 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1180 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1181 hci_stack->hci_transport->set_baudrate(baud_rate); 1182 } 1183 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1184 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1185 if (hci_stack->hci_transport->reset_link){ 1186 log_info("Link Reset"); 1187 hci_stack->hci_transport->reset_link(); 1188 } 1189 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1190 hci_run(); 1191 } 1192 break; 1193 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1194 // otherwise continue 1195 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1196 hci_send_cmd(&hci_read_local_supported_commands); 1197 break; 1198 default: 1199 break; 1200 } 1201 } 1202 #endif 1203 1204 static void hci_initializing_next_state(void){ 1205 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1206 } 1207 1208 // assumption: hci_can_send_command_packet_now() == true 1209 static void hci_initializing_run(void){ 1210 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1211 switch (hci_stack->substate){ 1212 case HCI_INIT_SEND_RESET: 1213 hci_state_reset(); 1214 1215 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1216 // prepare reset if command complete not received in 100ms 1217 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1218 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1219 btstack_run_loop_add_timer(&hci_stack->timeout); 1220 #endif 1221 // send command 1222 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1223 hci_send_cmd(&hci_reset); 1224 break; 1225 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1226 hci_send_cmd(&hci_read_local_version_information); 1227 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1228 break; 1229 case HCI_INIT_SEND_READ_LOCAL_NAME: 1230 hci_send_cmd(&hci_read_local_name); 1231 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1232 break; 1233 1234 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1235 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1236 hci_state_reset(); 1237 // prepare reset if command complete not received in 100ms 1238 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1239 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1240 btstack_run_loop_add_timer(&hci_stack->timeout); 1241 // send command 1242 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1243 hci_send_cmd(&hci_reset); 1244 break; 1245 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1246 hci_state_reset(); 1247 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1248 hci_send_cmd(&hci_reset); 1249 break; 1250 case HCI_INIT_SEND_BAUD_CHANGE: { 1251 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1252 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1253 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1254 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1255 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1256 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1257 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1258 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1259 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1260 btstack_run_loop_add_timer(&hci_stack->timeout); 1261 } 1262 break; 1263 } 1264 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1265 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1266 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1267 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1268 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1269 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1270 break; 1271 } 1272 case HCI_INIT_CUSTOM_INIT: 1273 // Custom initialization 1274 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1275 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1276 int send_cmd = 0; 1277 switch (hci_stack->chipset_result){ 1278 case BTSTACK_CHIPSET_VALID_COMMAND: 1279 send_cmd = 1; 1280 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1281 break; 1282 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1283 send_cmd = 1; 1284 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1285 log_info("CSR Warm Boot"); 1286 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1287 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1288 btstack_run_loop_add_timer(&hci_stack->timeout); 1289 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1290 && hci_stack->config 1291 && hci_stack->chipset 1292 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1293 && hci_stack->hci_transport->set_baudrate 1294 && hci_transport_uart_get_main_baud_rate()){ 1295 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1296 } else { 1297 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1298 } 1299 break; 1300 default: 1301 break; 1302 } 1303 1304 if (send_cmd){ 1305 int size = 3 + hci_stack->hci_packet_buffer[2]; 1306 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1307 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1308 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1309 break; 1310 } 1311 log_info("Init script done"); 1312 1313 // Init script download on Broadcom chipsets causes: 1314 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1315 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1316 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1317 1318 // - baud rate to reset, restore UART baud rate if needed 1319 int need_baud_change = hci_stack->config 1320 && hci_stack->chipset 1321 && hci_stack->chipset->set_baudrate_command 1322 && hci_stack->hci_transport->set_baudrate 1323 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1324 if (need_baud_change) { 1325 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1326 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1327 hci_stack->hci_transport->set_baudrate(baud_rate); 1328 } 1329 1330 uint16_t bcm_delay_ms = 300; 1331 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1332 // -> Work around: wait here. 1333 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1334 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1335 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1336 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1337 btstack_run_loop_add_timer(&hci_stack->timeout); 1338 break; 1339 } 1340 } 1341 // otherwise continue 1342 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1343 hci_send_cmd(&hci_read_local_supported_commands); 1344 break; 1345 case HCI_INIT_SET_BD_ADDR: 1346 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1347 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1348 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1349 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1350 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1351 break; 1352 #endif 1353 1354 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1355 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1356 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1357 hci_send_cmd(&hci_read_local_supported_commands); 1358 break; 1359 case HCI_INIT_READ_BD_ADDR: 1360 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1361 hci_send_cmd(&hci_read_bd_addr); 1362 break; 1363 case HCI_INIT_READ_BUFFER_SIZE: 1364 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1365 hci_send_cmd(&hci_read_buffer_size); 1366 break; 1367 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1368 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1369 hci_send_cmd(&hci_read_local_supported_features); 1370 break; 1371 1372 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1373 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1374 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1375 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1376 break; 1377 case HCI_INIT_HOST_BUFFER_SIZE: 1378 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1379 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1380 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1381 break; 1382 #endif 1383 1384 case HCI_INIT_SET_EVENT_MASK: 1385 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1386 if (hci_le_supported()){ 1387 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1388 } else { 1389 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1390 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1391 } 1392 break; 1393 1394 #ifdef ENABLE_CLASSIC 1395 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1396 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1397 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1398 break; 1399 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1400 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1401 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1402 break; 1403 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1404 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1405 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1406 break; 1407 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1408 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1409 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1410 break; 1411 case HCI_INIT_WRITE_LOCAL_NAME: { 1412 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1413 hci_reserve_packet_buffer(); 1414 uint8_t * packet = hci_stack->hci_packet_buffer; 1415 // construct HCI Command and send 1416 uint16_t opcode = hci_write_local_name.opcode; 1417 hci_stack->last_cmd_opcode = opcode; 1418 packet[0] = opcode & 0xff; 1419 packet[1] = opcode >> 8; 1420 packet[2] = DEVICE_NAME_LEN; 1421 memset(&packet[3], 0, DEVICE_NAME_LEN); 1422 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1423 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1424 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1425 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1426 // expand '00:00:00:00:00:00' in name with bd_addr 1427 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1428 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1429 break; 1430 } 1431 case HCI_INIT_WRITE_EIR_DATA: { 1432 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1433 hci_reserve_packet_buffer(); 1434 uint8_t * packet = hci_stack->hci_packet_buffer; 1435 // construct HCI Command in-place and send 1436 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1437 hci_stack->last_cmd_opcode = opcode; 1438 uint16_t offset = 0; 1439 packet[offset++] = opcode & 0xff; 1440 packet[offset++] = opcode >> 8; 1441 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1442 packet[offset++] = 0; // FEC not required 1443 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1444 if (hci_stack->eir_data){ 1445 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1446 ad_context_t context; 1447 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1448 uint8_t data_type = ad_iterator_get_data_type(&context); 1449 uint8_t size = ad_iterator_get_data_len(&context); 1450 const uint8_t *data = ad_iterator_get_data(&context); 1451 // copy item 1452 packet[offset++] = size + 1; 1453 packet[offset++] = data_type; 1454 memcpy(&packet[offset], data, size); 1455 // update name item 1456 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1457 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1458 } 1459 offset += size; 1460 } 1461 } else { 1462 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1463 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1464 packet[offset++] = bytes_to_copy + 1; 1465 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1466 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1467 // expand '00:00:00:00:00:00' in name with bd_addr 1468 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1469 } 1470 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1471 break; 1472 } 1473 case HCI_INIT_WRITE_INQUIRY_MODE: 1474 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1475 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1476 break; 1477 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1478 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1479 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1480 break; 1481 case HCI_INIT_WRITE_SCAN_ENABLE: 1482 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1483 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1484 break; 1485 // only sent if ENABLE_SCO_OVER_HCI is defined 1486 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1487 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1488 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1489 break; 1490 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1491 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1492 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1493 break; 1494 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1495 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1496 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1497 log_info("BCM: Route SCO data via HCI transport"); 1498 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1499 break; 1500 1501 #endif 1502 #ifdef ENABLE_BLE 1503 // LE INIT 1504 case HCI_INIT_LE_READ_BUFFER_SIZE: 1505 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1506 hci_send_cmd(&hci_le_read_buffer_size); 1507 break; 1508 case HCI_INIT_LE_SET_EVENT_MASK: 1509 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1510 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1511 break; 1512 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1513 // LE Supported Host = 1, Simultaneous Host = 0 1514 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1515 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1516 break; 1517 #endif 1518 1519 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1520 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1521 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1522 hci_send_cmd(&hci_le_read_maximum_data_length); 1523 break; 1524 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1525 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1526 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1527 break; 1528 #endif 1529 1530 #ifdef ENABLE_LE_CENTRAL 1531 case HCI_INIT_READ_WHITE_LIST_SIZE: 1532 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1533 hci_send_cmd(&hci_le_read_white_list_size); 1534 break; 1535 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1536 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1537 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1538 hci_send_cmd(&hci_le_set_scan_parameters, 1, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, 0); 1539 break; 1540 #endif 1541 default: 1542 return; 1543 } 1544 } 1545 1546 static void hci_init_done(void){ 1547 // done. tell the app 1548 log_info("hci_init_done -> HCI_STATE_WORKING"); 1549 hci_stack->state = HCI_STATE_WORKING; 1550 hci_emit_state(); 1551 hci_run(); 1552 } 1553 1554 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1555 bool command_completed = false; 1556 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1557 uint16_t opcode = little_endian_read_16(packet,3); 1558 if (opcode == hci_stack->last_cmd_opcode){ 1559 command_completed = true; 1560 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1561 } else { 1562 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1563 } 1564 } 1565 1566 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1567 uint8_t status = packet[2]; 1568 uint16_t opcode = little_endian_read_16(packet,4); 1569 if (opcode == hci_stack->last_cmd_opcode){ 1570 if (status){ 1571 command_completed = true; 1572 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1573 } else { 1574 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1575 } 1576 } else { 1577 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1578 } 1579 } 1580 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1581 // Vendor == CSR 1582 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1583 // TODO: track actual command 1584 command_completed = true; 1585 } 1586 1587 // Vendor == Toshiba 1588 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1589 // TODO: track actual command 1590 command_completed = true; 1591 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1592 hci_stack->num_cmd_packets = 1; 1593 } 1594 #endif 1595 1596 return command_completed; 1597 } 1598 1599 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1600 1601 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1602 1603 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1604 1605 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1606 1607 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1608 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1609 // 1610 // HCI Reset 1611 // Timeout 100 ms 1612 // HCI Reset 1613 // Command Complete Reset 1614 // HCI Read Local Version Information 1615 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1616 // hang... 1617 // 1618 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1619 if (!command_completed 1620 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1621 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1622 1623 uint16_t opcode = little_endian_read_16(packet,3); 1624 if (opcode == hci_reset.opcode){ 1625 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1626 return; 1627 } 1628 } 1629 1630 // CSR & H5 1631 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1632 if (!command_completed 1633 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1634 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1635 1636 uint16_t opcode = little_endian_read_16(packet,3); 1637 if (opcode == hci_reset.opcode){ 1638 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1639 return; 1640 } 1641 } 1642 1643 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1644 // fix: Correct substate and behave as command below 1645 if (command_completed){ 1646 switch (hci_stack->substate){ 1647 case HCI_INIT_SEND_RESET: 1648 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1649 break; 1650 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1651 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1652 break; 1653 default: 1654 break; 1655 } 1656 } 1657 1658 #endif 1659 1660 if (!command_completed) return; 1661 1662 bool need_baud_change = false; 1663 bool need_addr_change = false; 1664 1665 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1666 need_baud_change = hci_stack->config 1667 && hci_stack->chipset 1668 && hci_stack->chipset->set_baudrate_command 1669 && hci_stack->hci_transport->set_baudrate 1670 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1671 1672 need_addr_change = hci_stack->custom_bd_addr_set 1673 && hci_stack->chipset 1674 && hci_stack->chipset->set_bd_addr_command; 1675 #endif 1676 1677 switch(hci_stack->substate){ 1678 1679 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1680 case HCI_INIT_SEND_RESET: 1681 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1682 // fix: just correct substate and behave as command below 1683 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1684 btstack_run_loop_remove_timer(&hci_stack->timeout); 1685 break; 1686 case HCI_INIT_W4_SEND_RESET: 1687 btstack_run_loop_remove_timer(&hci_stack->timeout); 1688 break; 1689 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1690 log_info("Received local name, need baud change %d", (int) need_baud_change); 1691 if (need_baud_change){ 1692 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1693 return; 1694 } 1695 // skip baud change 1696 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1697 return; 1698 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1699 // for STLC2500D, baud rate change already happened. 1700 // for others, baud rate gets changed now 1701 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1702 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1703 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1704 hci_stack->hci_transport->set_baudrate(baud_rate); 1705 } 1706 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1707 return; 1708 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1709 btstack_run_loop_remove_timer(&hci_stack->timeout); 1710 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1711 return; 1712 case HCI_INIT_W4_CUSTOM_INIT: 1713 // repeat custom init 1714 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1715 return; 1716 #else 1717 case HCI_INIT_W4_SEND_RESET: 1718 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1719 return ; 1720 #endif 1721 1722 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1723 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1724 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1725 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1726 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1727 return; 1728 } 1729 if (need_addr_change){ 1730 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1731 return; 1732 } 1733 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1734 return; 1735 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1736 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1737 if (need_baud_change){ 1738 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1739 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1740 hci_stack->hci_transport->set_baudrate(baud_rate); 1741 } 1742 if (need_addr_change){ 1743 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1744 return; 1745 } 1746 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1747 return; 1748 case HCI_INIT_W4_SET_BD_ADDR: 1749 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1750 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1751 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1752 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1753 return; 1754 } 1755 // skipping st warm boot 1756 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1757 return; 1758 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1759 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1760 return; 1761 #endif 1762 case HCI_INIT_W4_READ_BD_ADDR: 1763 // only read buffer size if supported 1764 if (hci_stack->local_supported_commands[0] & 0x01) { 1765 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1766 return; 1767 } 1768 // skipping read buffer size 1769 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1770 return; 1771 case HCI_INIT_W4_SET_EVENT_MASK: 1772 // skip Classic init commands for LE only chipsets 1773 if (!hci_classic_supported()){ 1774 #ifdef ENABLE_BLE 1775 if (hci_le_supported()){ 1776 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1777 return; 1778 } 1779 #endif 1780 log_error("Neither BR/EDR nor LE supported"); 1781 hci_init_done(); 1782 return; 1783 } 1784 if (!gap_ssp_supported()){ 1785 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1786 return; 1787 } 1788 break; 1789 #ifdef ENABLE_BLE 1790 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1791 // skip write le host if not supported (e.g. on LE only EM9301) 1792 if (hci_stack->local_supported_commands[0] & 0x02) break; 1793 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1794 return; 1795 1796 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1797 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1798 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1799 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1800 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1801 return; 1802 } 1803 // explicit fall through to reduce repetitions 1804 1805 #ifdef ENABLE_LE_CENTRAL 1806 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1807 #else 1808 hci_init_done(); 1809 #endif 1810 return; 1811 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1812 1813 #endif /* ENABLE_BLE */ 1814 1815 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1816 // skip write secure connections host support if not supported or disabled 1817 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1] & 0x02) == 0) { 1818 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1819 return; 1820 } 1821 break; 1822 1823 #ifdef ENABLE_SCO_OVER_HCI 1824 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1825 // skip write synchronous flow control if not supported 1826 if (hci_stack->local_supported_commands[0] & 0x04) break; 1827 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1828 1829 /* fall through */ 1830 1831 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1832 // skip write default erroneous data reporting if not supported 1833 if (hci_stack->local_supported_commands[0] & 0x08) break; 1834 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1835 1836 /* fall through */ 1837 1838 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1839 // skip bcm set sco pcm config on non-Broadcom chipsets 1840 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1841 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1842 1843 /* fall through */ 1844 1845 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1846 if (!hci_le_supported()){ 1847 // SKIP LE init for Classic only configuration 1848 hci_init_done(); 1849 return; 1850 } 1851 break; 1852 1853 #else /* !ENABLE_SCO_OVER_HCI */ 1854 1855 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1856 #ifdef ENABLE_BLE 1857 if (hci_le_supported()){ 1858 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1859 return; 1860 } 1861 #endif 1862 // SKIP LE init for Classic only configuration 1863 hci_init_done(); 1864 return; 1865 #endif /* ENABLE_SCO_OVER_HCI */ 1866 1867 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1868 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1869 // Response to command before init done state -> init done 1870 case (HCI_INIT_DONE-1): 1871 hci_init_done(); 1872 return; 1873 #endif 1874 1875 default: 1876 break; 1877 } 1878 hci_initializing_next_state(); 1879 } 1880 1881 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1882 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1883 bd_addr_t bd_address; 1884 (void)memcpy(&bd_address, conn->address, 6); 1885 1886 #ifdef ENABLE_CLASSIC 1887 // cache needed data 1888 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1889 #endif 1890 1891 // connection failed, remove entry 1892 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1893 btstack_memory_hci_connection_free( conn ); 1894 1895 #ifdef ENABLE_CLASSIC 1896 // notify client if dedicated bonding 1897 if (notify_dedicated_bonding_failed){ 1898 log_info("hci notify_dedicated_bonding_failed"); 1899 hci_emit_dedicated_bonding_result(bd_address, status); 1900 } 1901 1902 // if authentication error, also delete link key 1903 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1904 gap_drop_link_key_for_bd_addr(bd_address); 1905 } 1906 #endif 1907 } 1908 1909 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1910 // SSP Controller 1911 if (features[6] & (1 << 3)){ 1912 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1913 } 1914 // eSCO 1915 if (features[3] & (1<<7)){ 1916 conn->remote_supported_features[0] |= 1; 1917 } 1918 // Extended features 1919 if (features[7] & (1<<7)){ 1920 conn->remote_supported_features[0] |= 2; 1921 } 1922 } 1923 1924 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1925 // SSP Host 1926 if (features[0] & (1 << 0)){ 1927 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1928 } 1929 } 1930 1931 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1932 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1933 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1934 if (conn->bonding_flags & BONDING_DEDICATED){ 1935 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1936 } 1937 } 1938 1939 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1940 // handle BT initialization 1941 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1942 hci_initializing_event_handler(packet, size); 1943 } 1944 1945 // help with BT sleep 1946 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1947 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1948 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1949 hci_initializing_next_state(); 1950 } 1951 } 1952 1953 static void event_handler(uint8_t *packet, int size){ 1954 1955 uint16_t event_length = packet[1]; 1956 1957 // assert packet is complete 1958 if (size != (event_length + 2)){ 1959 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1960 return; 1961 } 1962 1963 bd_addr_t addr; 1964 bd_addr_type_t addr_type; 1965 hci_con_handle_t handle; 1966 hci_connection_t * conn; 1967 int i; 1968 int create_connection_cmd; 1969 1970 #ifdef ENABLE_CLASSIC 1971 uint8_t link_type; 1972 #endif 1973 1974 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1975 1976 switch (hci_event_packet_get_type(packet)) { 1977 1978 case HCI_EVENT_COMMAND_COMPLETE: 1979 // get num cmd packets - limit to 1 to reduce complexity 1980 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1981 1982 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1983 if (packet[5]) break; 1984 // terminate, name 248 chars 1985 packet[6+248] = 0; 1986 log_info("local name: %s", &packet[6]); 1987 } 1988 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1989 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1990 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1991 uint16_t acl_len = little_endian_read_16(packet, 6); 1992 uint16_t sco_len = packet[8]; 1993 1994 // determine usable ACL/SCO payload size 1995 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1996 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1997 1998 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1999 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2000 2001 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2002 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2003 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2004 } 2005 } 2006 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 2007 if (packet[5] == 0){ 2008 uint8_t event[5]; 2009 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2010 event[1] = 3; 2011 (void)memcpy(&event[2], &packet[6], 3); 2012 hci_emit_event(event, sizeof(event), 1); 2013 } 2014 } 2015 #ifdef ENABLE_BLE 2016 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 2017 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2018 hci_stack->le_acl_packets_total_num = packet[8]; 2019 // determine usable ACL payload size 2020 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2021 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2022 } 2023 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2024 } 2025 #endif 2026 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2027 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 2028 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2029 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2030 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); 2031 } 2032 #endif 2033 #ifdef ENABLE_LE_CENTRAL 2034 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 2035 hci_stack->le_whitelist_capacity = packet[6]; 2036 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2037 } 2038 #endif 2039 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 2040 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2041 hci_stack->local_bd_addr); 2042 log_info("Local Address, Status: 0x%02x: Addr: %s", 2043 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2044 #ifdef ENABLE_CLASSIC 2045 if (hci_stack->link_key_db){ 2046 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2047 } 2048 #endif 2049 } 2050 #ifdef ENABLE_CLASSIC 2051 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2052 hci_emit_discoverable_enabled(hci_stack->discoverable); 2053 } 2054 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 2055 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2056 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2057 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2058 hci_emit_event(event, sizeof(event), 1); 2059 } 2060 } 2061 #endif 2062 2063 // Note: HCI init checks 2064 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 2065 (void)memcpy(hci_stack->local_supported_features, 2066 &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2067 8); 2068 2069 #ifdef ENABLE_CLASSIC 2070 // determine usable ACL packet types based on host buffer size and supported features 2071 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2072 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2073 #endif 2074 // Classic/LE 2075 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2076 } 2077 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 2078 // hci_stack->hci_version = little_endian_read_16(packet, 4); 2079 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 2080 uint16_t manufacturer = little_endian_read_16(packet, 10); 2081 // map Cypress to Broadcom 2082 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2083 log_info("Treat Cypress as Broadcom"); 2084 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2085 little_endian_store_16(packet, 10, manufacturer); 2086 } 2087 hci_stack->manufacturer = manufacturer; 2088 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 2089 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 2090 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2091 } 2092 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2093 hci_stack->local_supported_commands[0] = 2094 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2095 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2096 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2097 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2098 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2099 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2100 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2101 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+20] & 0x10) << 3); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2102 hci_stack->local_supported_commands[1] = 2103 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+ 2] & 0x40) >> 6) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2104 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+32] & 0x08) >> 2); // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2105 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2106 } 2107 #ifdef ENABLE_CLASSIC 2108 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2109 if (packet[5] == 0){ 2110 hci_stack->synchronous_flow_control_enabled = 1; 2111 } 2112 } 2113 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2114 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2115 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2116 conn = hci_connection_for_handle(handle); 2117 if (!conn) break; 2118 if (status == 0){ 2119 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2120 log_info("Handle %x04x key Size: %u", handle, key_size); 2121 conn->encryption_key_size = key_size; 2122 } else { 2123 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2124 conn->encryption_key_size = 1; 2125 } 2126 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2127 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2128 } 2129 #endif 2130 break; 2131 2132 case HCI_EVENT_COMMAND_STATUS: 2133 // get num cmd packets - limit to 1 to reduce complexity 2134 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2135 2136 // check command status to detected failed outgoing connections 2137 create_connection_cmd = 0; 2138 #ifdef ENABLE_CLASSIC 2139 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2140 create_connection_cmd = 1; 2141 } 2142 #endif 2143 #ifdef ENABLE_LE_CENTRAL 2144 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2145 create_connection_cmd = 1; 2146 } 2147 #endif 2148 if (create_connection_cmd) { 2149 uint8_t status = hci_event_command_status_get_status(packet); 2150 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2151 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); 2152 2153 // reset outgoing address info 2154 memset(hci_stack->outgoing_addr, 0, 6); 2155 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2156 2157 // error => outgoing connection failed 2158 if ((conn != NULL) && (status != 0)){ 2159 hci_handle_connection_failed(conn, status); 2160 } 2161 } 2162 break; 2163 2164 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2165 if (size < 3) return; 2166 uint16_t num_handles = packet[2]; 2167 if (size != (3 + num_handles * 4)) return; 2168 uint16_t offset = 3; 2169 for (i=0; i<num_handles;i++){ 2170 handle = little_endian_read_16(packet, offset) & 0x0fff; 2171 offset += 2; 2172 uint16_t num_packets = little_endian_read_16(packet, offset); 2173 offset += 2; 2174 2175 conn = hci_connection_for_handle(handle); 2176 if (!conn){ 2177 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2178 continue; 2179 } 2180 2181 if (conn->num_packets_sent >= num_packets){ 2182 conn->num_packets_sent -= num_packets; 2183 } else { 2184 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2185 conn->num_packets_sent = 0; 2186 } 2187 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2188 2189 #ifdef ENABLE_CLASSIC 2190 // For SCO, we do the can_send_now_check here 2191 hci_notify_if_sco_can_send_now(); 2192 #endif 2193 } 2194 break; 2195 } 2196 2197 #ifdef ENABLE_CLASSIC 2198 case HCI_EVENT_INQUIRY_COMPLETE: 2199 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2200 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2201 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2202 hci_emit_event(event, sizeof(event), 1); 2203 } 2204 break; 2205 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2206 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2207 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2208 } 2209 break; 2210 case HCI_EVENT_CONNECTION_REQUEST: 2211 reverse_bd_addr(&packet[2], addr); 2212 if (hci_stack->gap_classic_accept_callback != NULL){ 2213 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2214 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2215 bd_addr_copy(hci_stack->decline_addr, addr); 2216 break; 2217 } 2218 } 2219 2220 // TODO: eval COD 8-10 2221 link_type = packet[11]; 2222 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2223 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2224 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2225 if (!conn) { 2226 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2227 } 2228 if (!conn) { 2229 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2230 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2231 bd_addr_copy(hci_stack->decline_addr, addr); 2232 break; 2233 } 2234 conn->role = HCI_ROLE_SLAVE; 2235 conn->state = RECEIVED_CONNECTION_REQUEST; 2236 // store info about eSCO 2237 if (link_type == 0x02){ 2238 conn->remote_supported_features[0] |= 1; 2239 } 2240 hci_run(); 2241 break; 2242 2243 case HCI_EVENT_CONNECTION_COMPLETE: 2244 // Connection management 2245 reverse_bd_addr(&packet[5], addr); 2246 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2247 addr_type = BD_ADDR_TYPE_ACL; 2248 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2249 if (conn) { 2250 if (!packet[2]){ 2251 conn->state = OPEN; 2252 conn->con_handle = little_endian_read_16(packet, 3); 2253 2254 // queue get remote feature 2255 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2256 2257 // queue set supervision timeout if we're master 2258 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2259 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2260 } 2261 2262 // restart timer 2263 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2264 btstack_run_loop_add_timer(&conn->timeout); 2265 2266 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2267 2268 hci_emit_nr_connections_changed(); 2269 } else { 2270 // connection failed 2271 hci_handle_connection_failed(conn, packet[2]); 2272 } 2273 } 2274 break; 2275 2276 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2277 reverse_bd_addr(&packet[5], addr); 2278 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2279 if (packet[2]){ 2280 // connection failed 2281 break; 2282 } 2283 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2284 if (!conn) { 2285 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2286 } 2287 if (!conn) { 2288 break; 2289 } 2290 conn->state = OPEN; 2291 conn->con_handle = little_endian_read_16(packet, 3); 2292 2293 #ifdef ENABLE_SCO_OVER_HCI 2294 // update SCO 2295 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2296 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2297 } 2298 // trigger can send now 2299 if (hci_have_usb_transport()){ 2300 hci_stack->sco_can_send_now = 1; 2301 } 2302 #endif 2303 break; 2304 2305 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2306 handle = little_endian_read_16(packet, 3); 2307 conn = hci_connection_for_handle(handle); 2308 if (!conn) break; 2309 if (!packet[2]){ 2310 const uint8_t * features = &packet[5]; 2311 hci_handle_remote_features_page_0(conn, features); 2312 2313 // read extended features if possible 2314 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2315 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2316 break; 2317 } 2318 } 2319 hci_handle_remote_features_received(conn); 2320 break; 2321 2322 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2323 handle = little_endian_read_16(packet, 3); 2324 conn = hci_connection_for_handle(handle); 2325 if (!conn) break; 2326 // status = ok, page = 1 2327 if (!packet[2] && packet[5] == 1){ 2328 const uint8_t * features = &packet[7]; 2329 hci_handle_remote_features_page_1(conn, features); 2330 } 2331 hci_handle_remote_features_received(conn); 2332 break; 2333 2334 case HCI_EVENT_LINK_KEY_REQUEST: 2335 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2336 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2337 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2338 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2339 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2340 hci_run(); 2341 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2342 return; 2343 2344 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2345 reverse_bd_addr(&packet[2], addr); 2346 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2347 if (!conn) break; 2348 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2349 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2350 // Change Connection Encryption keeps link key type 2351 if (link_key_type != CHANGED_COMBINATION_KEY){ 2352 conn->link_key_type = link_key_type; 2353 } 2354 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2355 // still forward event to allow dismiss of pairing dialog 2356 break; 2357 } 2358 2359 case HCI_EVENT_PIN_CODE_REQUEST: 2360 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2361 // non-bondable mode: pin code negative reply will be sent 2362 if (!hci_stack->bondable){ 2363 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2364 hci_run(); 2365 return; 2366 } 2367 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2368 if (!hci_stack->link_key_db) break; 2369 hci_event_pin_code_request_get_bd_addr(packet, addr); 2370 hci_stack->link_key_db->delete_link_key(addr); 2371 break; 2372 2373 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2374 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2375 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2376 break; 2377 2378 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2379 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2380 if (!hci_stack->ssp_auto_accept) break; 2381 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2382 break; 2383 2384 case HCI_EVENT_USER_PASSKEY_REQUEST: 2385 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2386 if (!hci_stack->ssp_auto_accept) break; 2387 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2388 break; 2389 case HCI_EVENT_MODE_CHANGE: 2390 handle = hci_event_mode_change_get_handle(packet); 2391 conn = hci_connection_for_handle(handle); 2392 if (!conn) break; 2393 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2394 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2395 break; 2396 #endif 2397 2398 case HCI_EVENT_ENCRYPTION_CHANGE: 2399 handle = hci_event_encryption_change_get_connection_handle(packet); 2400 conn = hci_connection_for_handle(handle); 2401 if (!conn) break; 2402 if (hci_event_encryption_change_get_status(packet) == 0) { 2403 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2404 if (encryption_enabled){ 2405 if (hci_is_le_connection(conn)){ 2406 // For LE, we accept connection as encrypted 2407 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2408 } 2409 #ifdef ENABLE_CLASSIC 2410 else { 2411 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2412 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2413 bool connected_uses_aes_ccm = encryption_enabled == 2; 2414 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2415 log_info("SC during pairing, but only E0 now -> abort"); 2416 conn->state = conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2417 break; 2418 } 2419 2420 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2421 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2422 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2423 } else { 2424 // if not, pretend everything is perfect 2425 conn->encryption_key_size = 16; 2426 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2427 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2428 } 2429 } 2430 #endif 2431 } else { 2432 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2433 } 2434 } 2435 2436 break; 2437 2438 #ifdef ENABLE_CLASSIC 2439 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2440 handle = little_endian_read_16(packet, 3); 2441 conn = hci_connection_for_handle(handle); 2442 if (!conn) break; 2443 2444 // dedicated bonding: send result and disconnect 2445 if (conn->bonding_flags & BONDING_DEDICATED){ 2446 conn->bonding_flags &= ~BONDING_DEDICATED; 2447 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2448 conn->bonding_status = packet[2]; 2449 break; 2450 } 2451 2452 if ((packet[2] == 0) && (gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)){ 2453 // link key sufficient for requested security 2454 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2455 break; 2456 } 2457 // not enough 2458 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2459 break; 2460 #endif 2461 2462 // HCI_EVENT_DISCONNECTION_COMPLETE 2463 // has been split, to first notify stack before shutting connection down 2464 // see end of function, too. 2465 case HCI_EVENT_DISCONNECTION_COMPLETE: 2466 if (packet[2]) break; // status != 0 2467 handle = little_endian_read_16(packet, 3); 2468 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2469 if (hci_stack->acl_fragmentation_total_size > 0) { 2470 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2471 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2472 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2473 hci_stack->acl_fragmentation_total_size = 0; 2474 hci_stack->acl_fragmentation_pos = 0; 2475 if (release_buffer){ 2476 hci_release_packet_buffer(); 2477 } 2478 } 2479 } 2480 2481 conn = hci_connection_for_handle(handle); 2482 if (!conn) break; 2483 // mark connection for shutdown 2484 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2485 2486 // emit dedicatd bonding event 2487 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2488 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2489 } 2490 2491 #ifdef ENABLE_BLE 2492 #ifdef ENABLE_LE_PERIPHERAL 2493 // re-enable advertisements for le connections if active 2494 if (hci_is_le_connection(conn)){ 2495 hci_reenable_advertisements_if_needed(); 2496 } 2497 #endif 2498 #endif 2499 break; 2500 2501 case HCI_EVENT_HARDWARE_ERROR: 2502 log_error("Hardware Error: 0x%02x", packet[2]); 2503 if (hci_stack->hardware_error_callback){ 2504 (*hci_stack->hardware_error_callback)(packet[2]); 2505 } else { 2506 // if no special requests, just reboot stack 2507 hci_power_control_off(); 2508 hci_power_control_on(); 2509 } 2510 break; 2511 2512 #ifdef ENABLE_CLASSIC 2513 case HCI_EVENT_ROLE_CHANGE: 2514 if (packet[2]) break; // status != 0 2515 reverse_bd_addr(&packet[3], addr); 2516 addr_type = BD_ADDR_TYPE_ACL; 2517 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2518 if (!conn) break; 2519 conn->role = packet[9]; 2520 break; 2521 #endif 2522 2523 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2524 // release packet buffer only for asynchronous transport and if there are not further fragements 2525 if (hci_transport_synchronous()) { 2526 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2527 return; // instead of break: to avoid re-entering hci_run() 2528 } 2529 hci_stack->acl_fragmentation_tx_active = 0; 2530 if (hci_stack->acl_fragmentation_total_size) break; 2531 hci_release_packet_buffer(); 2532 2533 // L2CAP receives this event via the hci_emit_event below 2534 2535 #ifdef ENABLE_CLASSIC 2536 // For SCO, we do the can_send_now_check here 2537 hci_notify_if_sco_can_send_now(); 2538 #endif 2539 break; 2540 2541 #ifdef ENABLE_CLASSIC 2542 case HCI_EVENT_SCO_CAN_SEND_NOW: 2543 // For SCO, we do the can_send_now_check here 2544 hci_stack->sco_can_send_now = 1; 2545 hci_notify_if_sco_can_send_now(); 2546 return; 2547 2548 // explode inquriy results for easier consumption 2549 case HCI_EVENT_INQUIRY_RESULT: 2550 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2551 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2552 gap_inquiry_explode(packet, size); 2553 break; 2554 #endif 2555 2556 #ifdef ENABLE_BLE 2557 case HCI_EVENT_LE_META: 2558 switch (packet[2]){ 2559 #ifdef ENABLE_LE_CENTRAL 2560 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2561 // log_info("advertising report received"); 2562 if (!hci_stack->le_scanning_enabled) break; 2563 le_handle_advertisement_report(packet, size); 2564 break; 2565 #endif 2566 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2567 // Connection management 2568 reverse_bd_addr(&packet[8], addr); 2569 addr_type = (bd_addr_type_t)packet[7]; 2570 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2571 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2572 2573 #ifdef ENABLE_LE_CENTRAL 2574 // if auto-connect, remove from whitelist in both roles 2575 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2576 hci_remove_from_whitelist(addr_type, addr); 2577 } 2578 // handle error: error is reported only to the initiator -> outgoing connection 2579 if (packet[3]){ 2580 2581 // handle cancelled outgoing connection 2582 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2583 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2584 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2585 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2586 conn = gap_get_outgoing_connection(); 2587 } 2588 2589 // outgoing connection establishment is done 2590 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2591 // remove entry 2592 if (conn){ 2593 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2594 btstack_memory_hci_connection_free( conn ); 2595 } 2596 break; 2597 } 2598 #endif 2599 // on success, both hosts receive connection complete event 2600 if (packet[6] == HCI_ROLE_MASTER){ 2601 #ifdef ENABLE_LE_CENTRAL 2602 // if we're master, it was an outgoing connection and we're done with it 2603 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2604 #endif 2605 } else { 2606 #ifdef ENABLE_LE_PERIPHERAL 2607 // if we're slave, it was an incoming connection, advertisements have stopped 2608 hci_stack->le_advertisements_active = 0; 2609 #endif 2610 } 2611 // LE connections are auto-accepted, so just create a connection if there isn't one already 2612 if (!conn){ 2613 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2614 } 2615 // no memory, sorry. 2616 if (!conn){ 2617 break; 2618 } 2619 2620 conn->state = OPEN; 2621 conn->role = packet[6]; 2622 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2623 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2624 2625 #ifdef ENABLE_LE_PERIPHERAL 2626 if (packet[6] == HCI_ROLE_SLAVE){ 2627 hci_reenable_advertisements_if_needed(); 2628 } 2629 #endif 2630 2631 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2632 2633 // restart timer 2634 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2635 // btstack_run_loop_add_timer(&conn->timeout); 2636 2637 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2638 2639 hci_emit_nr_connections_changed(); 2640 break; 2641 2642 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2643 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2644 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2645 conn = hci_connection_for_handle(handle); 2646 if (!conn) break; 2647 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2648 break; 2649 2650 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2651 // connection 2652 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2653 conn = hci_connection_for_handle(handle); 2654 if (conn) { 2655 // read arguments 2656 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2657 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2658 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2659 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2660 2661 // validate against current connection parameter range 2662 le_connection_parameter_range_t existing_range; 2663 gap_get_connection_parameter_range(&existing_range); 2664 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2665 if (update_parameter){ 2666 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2667 conn->le_conn_interval_min = le_conn_interval_min; 2668 conn->le_conn_interval_max = le_conn_interval_max; 2669 conn->le_conn_latency = le_conn_latency; 2670 conn->le_supervision_timeout = le_supervision_timeout; 2671 } else { 2672 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2673 } 2674 } 2675 break; 2676 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2677 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2678 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2679 conn = hci_connection_for_handle(handle); 2680 if (conn) { 2681 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2682 } 2683 break; 2684 #endif 2685 default: 2686 break; 2687 } 2688 break; 2689 #endif 2690 case HCI_EVENT_VENDOR_SPECIFIC: 2691 // Vendor specific commands often create vendor specific event instead of num completed packets 2692 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2693 switch (hci_stack->manufacturer){ 2694 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2695 hci_stack->num_cmd_packets = 1; 2696 break; 2697 default: 2698 break; 2699 } 2700 break; 2701 default: 2702 break; 2703 } 2704 2705 handle_event_for_current_stack_state(packet, size); 2706 2707 // notify upper stack 2708 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2709 2710 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2711 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2712 if (!packet[2]){ 2713 handle = little_endian_read_16(packet, 3); 2714 hci_connection_t * aConn = hci_connection_for_handle(handle); 2715 if (aConn) { 2716 // discard connection if app did not trigger a reconnect in the event handler 2717 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2718 hci_shutdown_connection(aConn); 2719 } 2720 } 2721 } 2722 } 2723 2724 // execute main loop 2725 hci_run(); 2726 } 2727 2728 #ifdef ENABLE_CLASSIC 2729 2730 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2731 static void sco_schedule_tx(hci_connection_t * conn); 2732 2733 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2734 log_debug("SCO TX Timeout"); 2735 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2736 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2737 if (!conn) return; 2738 2739 // trigger send 2740 conn->sco_tx_ready = 1; 2741 // extra packet if CVSD but SCO buffer is too short 2742 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2743 conn->sco_tx_ready++; 2744 } 2745 hci_notify_if_sco_can_send_now(); 2746 } 2747 2748 2749 #define SCO_TX_AFTER_RX_MS (6) 2750 2751 static void sco_schedule_tx(hci_connection_t * conn){ 2752 2753 uint32_t now = btstack_run_loop_get_time_ms(); 2754 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2755 int time_delta_ms = sco_tx_ms - now; 2756 2757 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2758 2759 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2760 btstack_run_loop_set_timer(timer, time_delta_ms); 2761 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2762 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2763 btstack_run_loop_add_timer(timer); 2764 } 2765 2766 static void sco_handler(uint8_t * packet, uint16_t size){ 2767 // lookup connection struct 2768 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2769 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2770 if (!conn) return; 2771 2772 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2773 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2774 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2775 packet[2] = 0x3c; 2776 memmove(&packet[3], &packet[23], 63); 2777 size = 63; 2778 } 2779 } 2780 2781 if (hci_have_usb_transport()){ 2782 // Nothing to do 2783 } else { 2784 // 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); 2785 if (hci_stack->synchronous_flow_control_enabled == 0){ 2786 uint32_t now = btstack_run_loop_get_time_ms(); 2787 2788 if (!conn->sco_rx_valid){ 2789 // ignore first 10 packets 2790 conn->sco_rx_count++; 2791 // log_debug("sco rx count %u", conn->sco_rx_count); 2792 if (conn->sco_rx_count == 10) { 2793 // use first timestamp as is and pretent it just started 2794 conn->sco_rx_ms = now; 2795 conn->sco_rx_valid = 1; 2796 conn->sco_rx_count = 0; 2797 sco_schedule_tx(conn); 2798 } 2799 } else { 2800 // track expected arrival timme 2801 conn->sco_rx_count++; 2802 conn->sco_rx_ms += 7; 2803 int delta = (int32_t) (now - conn->sco_rx_ms); 2804 if (delta > 0){ 2805 conn->sco_rx_ms++; 2806 } 2807 // log_debug("sco rx %u", conn->sco_rx_ms); 2808 sco_schedule_tx(conn); 2809 } 2810 } 2811 } 2812 // deliver to app 2813 if (hci_stack->sco_packet_handler) { 2814 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2815 } 2816 2817 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2818 conn->num_packets_completed++; 2819 hci_stack->host_completed_packets = 1; 2820 hci_run(); 2821 #endif 2822 } 2823 #endif 2824 2825 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2826 hci_dump_packet(packet_type, 1, packet, size); 2827 switch (packet_type) { 2828 case HCI_EVENT_PACKET: 2829 event_handler(packet, size); 2830 break; 2831 case HCI_ACL_DATA_PACKET: 2832 acl_handler(packet, size); 2833 break; 2834 #ifdef ENABLE_CLASSIC 2835 case HCI_SCO_DATA_PACKET: 2836 sco_handler(packet, size); 2837 break; 2838 #endif 2839 default: 2840 break; 2841 } 2842 } 2843 2844 /** 2845 * @brief Add event packet handler. 2846 */ 2847 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2848 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2849 } 2850 2851 2852 /** Register HCI packet handlers */ 2853 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2854 hci_stack->acl_packet_handler = handler; 2855 } 2856 2857 #ifdef ENABLE_CLASSIC 2858 /** 2859 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2860 */ 2861 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2862 hci_stack->sco_packet_handler = handler; 2863 } 2864 #endif 2865 2866 static void hci_state_reset(void){ 2867 // no connections yet 2868 hci_stack->connections = NULL; 2869 2870 // keep discoverable/connectable as this has been requested by the client(s) 2871 // hci_stack->discoverable = 0; 2872 // hci_stack->connectable = 0; 2873 // hci_stack->bondable = 1; 2874 // hci_stack->own_addr_type = 0; 2875 2876 // buffer is free 2877 hci_stack->hci_packet_buffer_reserved = 0; 2878 2879 // no pending cmds 2880 hci_stack->decline_reason = 0; 2881 hci_stack->new_scan_enable_value = 0xff; 2882 2883 // LE 2884 #ifdef ENABLE_BLE 2885 memset(hci_stack->le_random_address, 0, 6); 2886 hci_stack->le_random_address_set = 0; 2887 #endif 2888 #ifdef ENABLE_LE_CENTRAL 2889 hci_stack->le_scanning_active = 0; 2890 hci_stack->le_scan_type = 0xff; 2891 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2892 hci_stack->le_whitelist = 0; 2893 hci_stack->le_whitelist_capacity = 0; 2894 #endif 2895 } 2896 2897 #ifdef ENABLE_CLASSIC 2898 /** 2899 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2900 */ 2901 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2902 // store and open remote device db 2903 hci_stack->link_key_db = link_key_db; 2904 if (hci_stack->link_key_db) { 2905 hci_stack->link_key_db->open(); 2906 } 2907 } 2908 #endif 2909 2910 void hci_init(const hci_transport_t *transport, const void *config){ 2911 2912 #ifdef HAVE_MALLOC 2913 if (!hci_stack) { 2914 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2915 } 2916 #else 2917 hci_stack = &hci_stack_static; 2918 #endif 2919 memset(hci_stack, 0, sizeof(hci_stack_t)); 2920 2921 // reference to use transport layer implementation 2922 hci_stack->hci_transport = transport; 2923 2924 // reference to used config 2925 hci_stack->config = config; 2926 2927 // setup pointer for outgoing packet buffer 2928 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2929 2930 // max acl payload size defined in config.h 2931 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2932 2933 // register packet handlers with transport 2934 transport->register_packet_handler(&packet_handler); 2935 2936 hci_stack->state = HCI_STATE_OFF; 2937 2938 // class of device 2939 hci_stack->class_of_device = 0x007a020c; // Smartphone 2940 2941 // bondable by default 2942 hci_stack->bondable = 1; 2943 2944 #ifdef ENABLE_CLASSIC 2945 // classic name 2946 hci_stack->local_name = default_classic_name; 2947 2948 // Master slave policy 2949 hci_stack->master_slave_policy = 1; 2950 2951 // Allow Role Switch 2952 hci_stack->allow_role_switch = 1; 2953 2954 // Default / minimum security level = 2 2955 hci_stack->gap_security_level = LEVEL_2; 2956 2957 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2958 hci_stack->gap_required_encyrption_key_size = 16; 2959 #endif 2960 2961 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2962 hci_stack->ssp_enable = 1; 2963 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2964 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2965 hci_stack->ssp_auto_accept = 1; 2966 2967 // Secure Connections: enable (requires support from Controller) 2968 hci_stack->secure_connections_enable = true; 2969 2970 // voice setting - signed 16 bit pcm data with CVSD over the air 2971 hci_stack->sco_voice_setting = 0x60; 2972 2973 #ifdef ENABLE_LE_CENTRAL 2974 // connection parameter to use for outgoing connections 2975 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2976 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2977 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2978 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2979 hci_stack->le_connection_latency = 4; // 4 2980 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2981 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2982 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2983 2984 // default LE Scanning 2985 hci_stack->le_scan_interval = 0x1e0; 2986 hci_stack->le_scan_window = 0x30; 2987 #endif 2988 2989 #ifdef ENABLE_LE_PERIPHERAL 2990 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2991 #endif 2992 2993 // connection parameter range used to answer connection parameter update requests in l2cap 2994 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2995 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2996 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2997 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2998 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2999 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3000 3001 hci_state_reset(); 3002 } 3003 3004 /** 3005 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3006 */ 3007 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3008 hci_stack->chipset = chipset_driver; 3009 3010 // reset chipset driver - init is also called on power_up 3011 if (hci_stack->chipset && hci_stack->chipset->init){ 3012 hci_stack->chipset->init(hci_stack->config); 3013 } 3014 } 3015 3016 /** 3017 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3018 */ 3019 void hci_set_control(const btstack_control_t *hardware_control){ 3020 // references to used control implementation 3021 hci_stack->control = hardware_control; 3022 // init with transport config 3023 hardware_control->init(hci_stack->config); 3024 } 3025 3026 void hci_close(void){ 3027 // close remote device db 3028 if (hci_stack->link_key_db) { 3029 hci_stack->link_key_db->close(); 3030 } 3031 3032 btstack_linked_list_iterator_t lit; 3033 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3034 while (btstack_linked_list_iterator_has_next(&lit)){ 3035 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3036 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3037 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3038 hci_shutdown_connection(connection); 3039 } 3040 3041 hci_power_control(HCI_POWER_OFF); 3042 3043 #ifdef HAVE_MALLOC 3044 free(hci_stack); 3045 #endif 3046 hci_stack = NULL; 3047 } 3048 3049 #ifdef ENABLE_CLASSIC 3050 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3051 // validate ranage and set 3052 if (encryption_key_size < 7) return; 3053 if (encryption_key_size > 16) return; 3054 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3055 } 3056 3057 void gap_set_security_level(gap_security_level_t security_level){ 3058 hci_stack->gap_security_level = security_level; 3059 } 3060 3061 gap_security_level_t gap_get_security_level(void){ 3062 return hci_stack->gap_security_level; 3063 } 3064 #endif 3065 3066 #ifdef ENABLE_CLASSIC 3067 void gap_set_class_of_device(uint32_t class_of_device){ 3068 hci_stack->class_of_device = class_of_device; 3069 } 3070 3071 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3072 hci_stack->default_link_policy_settings = default_link_policy_settings; 3073 } 3074 3075 void gap_set_allow_role_switch(bool allow_role_switch){ 3076 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3077 } 3078 3079 uint8_t hci_get_allow_role_switch(void){ 3080 return hci_stack->allow_role_switch; 3081 } 3082 3083 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3084 hci_stack->link_supervision_timeout = link_supervision_timeout; 3085 } 3086 3087 void hci_disable_l2cap_timeout_check(void){ 3088 disable_l2cap_timeouts = 1; 3089 } 3090 #endif 3091 3092 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3093 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3094 void hci_set_bd_addr(bd_addr_t addr){ 3095 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3096 hci_stack->custom_bd_addr_set = 1; 3097 } 3098 #endif 3099 3100 // State-Module-Driver overview 3101 // state module low-level 3102 // HCI_STATE_OFF off close 3103 // HCI_STATE_INITIALIZING, on open 3104 // HCI_STATE_WORKING, on open 3105 // HCI_STATE_HALTING, on open 3106 // HCI_STATE_SLEEPING, off/sleep close 3107 // HCI_STATE_FALLING_ASLEEP on open 3108 3109 static int hci_power_control_on(void){ 3110 3111 // power on 3112 int err = 0; 3113 if (hci_stack->control && hci_stack->control->on){ 3114 err = (*hci_stack->control->on)(); 3115 } 3116 if (err){ 3117 log_error( "POWER_ON failed"); 3118 hci_emit_hci_open_failed(); 3119 return err; 3120 } 3121 3122 // int chipset driver 3123 if (hci_stack->chipset && hci_stack->chipset->init){ 3124 hci_stack->chipset->init(hci_stack->config); 3125 } 3126 3127 // init transport 3128 if (hci_stack->hci_transport->init){ 3129 hci_stack->hci_transport->init(hci_stack->config); 3130 } 3131 3132 // open transport 3133 err = hci_stack->hci_transport->open(); 3134 if (err){ 3135 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3136 if (hci_stack->control && hci_stack->control->off){ 3137 (*hci_stack->control->off)(); 3138 } 3139 hci_emit_hci_open_failed(); 3140 return err; 3141 } 3142 return 0; 3143 } 3144 3145 static void hci_power_control_off(void){ 3146 3147 log_info("hci_power_control_off"); 3148 3149 // close low-level device 3150 hci_stack->hci_transport->close(); 3151 3152 log_info("hci_power_control_off - hci_transport closed"); 3153 3154 // power off 3155 if (hci_stack->control && hci_stack->control->off){ 3156 (*hci_stack->control->off)(); 3157 } 3158 3159 log_info("hci_power_control_off - control closed"); 3160 3161 hci_stack->state = HCI_STATE_OFF; 3162 } 3163 3164 static void hci_power_control_sleep(void){ 3165 3166 log_info("hci_power_control_sleep"); 3167 3168 #if 0 3169 // don't close serial port during sleep 3170 3171 // close low-level device 3172 hci_stack->hci_transport->close(hci_stack->config); 3173 #endif 3174 3175 // sleep mode 3176 if (hci_stack->control && hci_stack->control->sleep){ 3177 (*hci_stack->control->sleep)(); 3178 } 3179 3180 hci_stack->state = HCI_STATE_SLEEPING; 3181 } 3182 3183 static int hci_power_control_wake(void){ 3184 3185 log_info("hci_power_control_wake"); 3186 3187 // wake on 3188 if (hci_stack->control && hci_stack->control->wake){ 3189 (*hci_stack->control->wake)(); 3190 } 3191 3192 #if 0 3193 // open low-level device 3194 int err = hci_stack->hci_transport->open(hci_stack->config); 3195 if (err){ 3196 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3197 if (hci_stack->control && hci_stack->control->off){ 3198 (*hci_stack->control->off)(); 3199 } 3200 hci_emit_hci_open_failed(); 3201 return err; 3202 } 3203 #endif 3204 3205 return 0; 3206 } 3207 3208 static void hci_power_transition_to_initializing(void){ 3209 // set up state machine 3210 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3211 hci_stack->hci_packet_buffer_reserved = 0; 3212 hci_stack->state = HCI_STATE_INITIALIZING; 3213 hci_stack->substate = HCI_INIT_SEND_RESET; 3214 } 3215 3216 int hci_power_control(HCI_POWER_MODE power_mode){ 3217 3218 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3219 3220 int err = 0; 3221 switch (hci_stack->state){ 3222 3223 case HCI_STATE_OFF: 3224 switch (power_mode){ 3225 case HCI_POWER_ON: 3226 err = hci_power_control_on(); 3227 if (err) { 3228 log_error("hci_power_control_on() error %d", err); 3229 return err; 3230 } 3231 hci_power_transition_to_initializing(); 3232 break; 3233 case HCI_POWER_OFF: 3234 // do nothing 3235 break; 3236 case HCI_POWER_SLEEP: 3237 // do nothing (with SLEEP == OFF) 3238 break; 3239 } 3240 break; 3241 3242 case HCI_STATE_INITIALIZING: 3243 switch (power_mode){ 3244 case HCI_POWER_ON: 3245 // do nothing 3246 break; 3247 case HCI_POWER_OFF: 3248 // no connections yet, just turn it off 3249 hci_power_control_off(); 3250 break; 3251 case HCI_POWER_SLEEP: 3252 // no connections yet, just turn it off 3253 hci_power_control_sleep(); 3254 break; 3255 } 3256 break; 3257 3258 case HCI_STATE_WORKING: 3259 switch (power_mode){ 3260 case HCI_POWER_ON: 3261 // do nothing 3262 break; 3263 case HCI_POWER_OFF: 3264 // see hci_run 3265 hci_stack->state = HCI_STATE_HALTING; 3266 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3267 break; 3268 case HCI_POWER_SLEEP: 3269 // see hci_run 3270 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3271 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3272 break; 3273 } 3274 break; 3275 3276 case HCI_STATE_HALTING: 3277 switch (power_mode){ 3278 case HCI_POWER_ON: 3279 hci_power_transition_to_initializing(); 3280 break; 3281 case HCI_POWER_OFF: 3282 // do nothing 3283 break; 3284 case HCI_POWER_SLEEP: 3285 // see hci_run 3286 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3287 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3288 break; 3289 } 3290 break; 3291 3292 case HCI_STATE_FALLING_ASLEEP: 3293 switch (power_mode){ 3294 case HCI_POWER_ON: 3295 3296 #ifdef HAVE_PLATFORM_IPHONE_OS 3297 // nothing to do, if H4 supports power management 3298 if (btstack_control_iphone_power_management_enabled()){ 3299 hci_stack->state = HCI_STATE_INITIALIZING; 3300 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3301 break; 3302 } 3303 #endif 3304 hci_power_transition_to_initializing(); 3305 break; 3306 case HCI_POWER_OFF: 3307 // see hci_run 3308 hci_stack->state = HCI_STATE_HALTING; 3309 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3310 break; 3311 case HCI_POWER_SLEEP: 3312 // do nothing 3313 break; 3314 } 3315 break; 3316 3317 case HCI_STATE_SLEEPING: 3318 switch (power_mode){ 3319 case HCI_POWER_ON: 3320 3321 #ifdef HAVE_PLATFORM_IPHONE_OS 3322 // nothing to do, if H4 supports power management 3323 if (btstack_control_iphone_power_management_enabled()){ 3324 hci_stack->state = HCI_STATE_INITIALIZING; 3325 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3326 hci_update_scan_enable(); 3327 break; 3328 } 3329 #endif 3330 err = hci_power_control_wake(); 3331 if (err) return err; 3332 hci_power_transition_to_initializing(); 3333 break; 3334 case HCI_POWER_OFF: 3335 hci_stack->state = HCI_STATE_HALTING; 3336 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3337 break; 3338 case HCI_POWER_SLEEP: 3339 // do nothing 3340 break; 3341 } 3342 break; 3343 } 3344 3345 // create internal event 3346 hci_emit_state(); 3347 3348 // trigger next/first action 3349 hci_run(); 3350 3351 return 0; 3352 } 3353 3354 3355 #ifdef ENABLE_CLASSIC 3356 3357 static void hci_update_scan_enable(void){ 3358 // 2 = page scan, 1 = inq scan 3359 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3360 hci_run(); 3361 } 3362 3363 void gap_discoverable_control(uint8_t enable){ 3364 if (enable) enable = 1; // normalize argument 3365 3366 if (hci_stack->discoverable == enable){ 3367 hci_emit_discoverable_enabled(hci_stack->discoverable); 3368 return; 3369 } 3370 3371 hci_stack->discoverable = enable; 3372 hci_update_scan_enable(); 3373 } 3374 3375 void gap_connectable_control(uint8_t enable){ 3376 if (enable) enable = 1; // normalize argument 3377 3378 // don't emit event 3379 if (hci_stack->connectable == enable) return; 3380 3381 hci_stack->connectable = enable; 3382 hci_update_scan_enable(); 3383 } 3384 #endif 3385 3386 void gap_local_bd_addr(bd_addr_t address_buffer){ 3387 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3388 } 3389 3390 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3391 static void hci_host_num_completed_packets(void){ 3392 3393 // create packet manually as arrays are not supported and num_commands should not get reduced 3394 hci_reserve_packet_buffer(); 3395 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3396 3397 uint16_t size = 0; 3398 uint16_t num_handles = 0; 3399 packet[size++] = 0x35; 3400 packet[size++] = 0x0c; 3401 size++; // skip param len 3402 size++; // skip num handles 3403 3404 // add { handle, packets } entries 3405 btstack_linked_item_t * it; 3406 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3407 hci_connection_t * connection = (hci_connection_t *) it; 3408 if (connection->num_packets_completed){ 3409 little_endian_store_16(packet, size, connection->con_handle); 3410 size += 2; 3411 little_endian_store_16(packet, size, connection->num_packets_completed); 3412 size += 2; 3413 // 3414 num_handles++; 3415 connection->num_packets_completed = 0; 3416 } 3417 } 3418 3419 packet[2] = size - 3; 3420 packet[3] = num_handles; 3421 3422 hci_stack->host_completed_packets = 0; 3423 3424 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3425 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3426 3427 // release packet buffer for synchronous transport implementations 3428 if (hci_transport_synchronous()){ 3429 hci_release_packet_buffer(); 3430 hci_emit_transport_packet_sent(); 3431 } 3432 } 3433 #endif 3434 3435 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3436 UNUSED(ds); 3437 hci_stack->substate = HCI_HALTING_CLOSE; 3438 // allow packet handlers to defer final shutdown 3439 hci_emit_state(); 3440 hci_run(); 3441 } 3442 3443 static bool hci_run_acl_fragments(void){ 3444 if (hci_stack->acl_fragmentation_total_size > 0) { 3445 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3446 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3447 if (connection) { 3448 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3449 hci_send_acl_packet_fragments(connection); 3450 return true; 3451 } 3452 } else { 3453 // connection gone -> discard further fragments 3454 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3455 hci_stack->acl_fragmentation_total_size = 0; 3456 hci_stack->acl_fragmentation_pos = 0; 3457 } 3458 } 3459 return false; 3460 } 3461 3462 #ifdef ENABLE_CLASSIC 3463 static bool hci_run_general_gap_classic(void){ 3464 3465 // decline incoming connections 3466 if (hci_stack->decline_reason){ 3467 uint8_t reason = hci_stack->decline_reason; 3468 hci_stack->decline_reason = 0; 3469 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3470 return true; 3471 } 3472 // send scan enable 3473 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3474 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3475 hci_stack->new_scan_enable_value = 0xff; 3476 return true; 3477 } 3478 // start/stop inquiry 3479 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3480 uint8_t duration = hci_stack->inquiry_state; 3481 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3482 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3483 return true; 3484 } 3485 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3486 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3487 hci_send_cmd(&hci_inquiry_cancel); 3488 return true; 3489 } 3490 // remote name request 3491 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3492 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3493 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3494 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3495 return true; 3496 } 3497 // pairing 3498 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3499 uint8_t state = hci_stack->gap_pairing_state; 3500 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3501 switch (state){ 3502 case GAP_PAIRING_STATE_SEND_PIN: 3503 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); 3504 break; 3505 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3506 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3507 break; 3508 case GAP_PAIRING_STATE_SEND_PASSKEY: 3509 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3510 break; 3511 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3512 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3513 break; 3514 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3515 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3516 break; 3517 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3518 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3519 break; 3520 default: 3521 break; 3522 } 3523 return true; 3524 } 3525 return false; 3526 } 3527 #endif 3528 3529 #ifdef ENABLE_BLE 3530 static bool hci_run_general_gap_le(void){ 3531 3532 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3533 3534 if (hci_stack->state != HCI_STATE_WORKING) return false; 3535 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0) ) return false; 3536 3537 #ifdef ENABLE_LE_CENTRAL 3538 // parameter change requires scanning to be stopped first 3539 if (hci_stack->le_scan_type != 0xff) { 3540 if (hci_stack->le_scanning_active){ 3541 hci_stack->le_scanning_active = 0; 3542 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3543 } else { 3544 int scan_type = (int) hci_stack->le_scan_type; 3545 hci_stack->le_scan_type = 0xff; 3546 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); 3547 } 3548 return true; 3549 } 3550 // finally, we can enable/disable le scan 3551 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3552 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3553 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3554 return true; 3555 } 3556 #endif 3557 #ifdef ENABLE_LE_PERIPHERAL 3558 // le advertisement control 3559 if (hci_stack->le_advertisements_todo){ 3560 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3561 } 3562 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3563 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3564 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3565 return true; 3566 } 3567 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3568 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3569 hci_send_cmd(&hci_le_set_advertising_parameters, 3570 hci_stack->le_advertisements_interval_min, 3571 hci_stack->le_advertisements_interval_max, 3572 hci_stack->le_advertisements_type, 3573 hci_stack->le_own_addr_type, 3574 hci_stack->le_advertisements_direct_address_type, 3575 hci_stack->le_advertisements_direct_address, 3576 hci_stack->le_advertisements_channel_map, 3577 hci_stack->le_advertisements_filter_policy); 3578 return true; 3579 } 3580 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3581 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3582 uint8_t adv_data_clean[31]; 3583 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3584 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3585 hci_stack->le_advertisements_data_len); 3586 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3587 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3588 return true; 3589 } 3590 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3591 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3592 uint8_t scan_data_clean[31]; 3593 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3594 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3595 hci_stack->le_scan_response_data_len); 3596 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3597 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3598 return true; 3599 } 3600 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3601 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3602 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3603 return true; 3604 } 3605 #endif 3606 3607 #ifdef ENABLE_LE_CENTRAL 3608 // 3609 // LE Whitelist Management 3610 // 3611 3612 // check if whitelist needs modification 3613 btstack_linked_list_iterator_t lit; 3614 int modification_pending = 0; 3615 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3616 while (btstack_linked_list_iterator_has_next(&lit)){ 3617 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3618 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3619 modification_pending = 1; 3620 break; 3621 } 3622 } 3623 3624 if (modification_pending){ 3625 // stop connnecting if modification pending 3626 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3627 hci_send_cmd(&hci_le_create_connection_cancel); 3628 return true; 3629 } 3630 3631 // add/remove entries 3632 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3633 while (btstack_linked_list_iterator_has_next(&lit)){ 3634 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3635 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3636 entry->state = LE_WHITELIST_ON_CONTROLLER; 3637 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3638 return true; 3639 } 3640 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3641 bd_addr_t address; 3642 bd_addr_type_t address_type = entry->address_type; 3643 (void)memcpy(address, entry->address, 6); 3644 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3645 btstack_memory_whitelist_entry_free(entry); 3646 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3647 return true; 3648 } 3649 } 3650 } 3651 3652 // start connecting 3653 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3654 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3655 bd_addr_t null_addr; 3656 memset(null_addr, 0, 6); 3657 hci_send_cmd(&hci_le_create_connection, 3658 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3659 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3660 1, // use whitelist 3661 0, // peer address type 3662 null_addr, // peer bd addr 3663 hci_stack->le_own_addr_type, // our addr type: 3664 hci_stack->le_connection_interval_min, // conn interval min 3665 hci_stack->le_connection_interval_max, // conn interval max 3666 hci_stack->le_connection_latency, // conn latency 3667 hci_stack->le_supervision_timeout, // conn latency 3668 hci_stack->le_minimum_ce_length, // min ce length 3669 hci_stack->le_maximum_ce_length // max ce length 3670 ); 3671 return true; 3672 } 3673 #endif 3674 return false; 3675 } 3676 #endif 3677 3678 static bool hci_run_general_pending_commmands(void){ 3679 btstack_linked_item_t * it; 3680 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3681 hci_connection_t * connection = (hci_connection_t *) it; 3682 3683 switch(connection->state){ 3684 case SEND_CREATE_CONNECTION: 3685 switch(connection->address_type){ 3686 #ifdef ENABLE_CLASSIC 3687 case BD_ADDR_TYPE_ACL: 3688 log_info("sending hci_create_connection"); 3689 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3690 break; 3691 #endif 3692 default: 3693 #ifdef ENABLE_BLE 3694 #ifdef ENABLE_LE_CENTRAL 3695 // track outgoing connection 3696 hci_stack->outgoing_addr_type = connection->address_type; 3697 (void)memcpy(hci_stack->outgoing_addr, 3698 connection->address, 6); 3699 log_info("sending hci_le_create_connection"); 3700 hci_send_cmd(&hci_le_create_connection, 3701 hci_stack->le_connection_scan_interval, // conn scan interval 3702 hci_stack->le_connection_scan_window, // conn scan windows 3703 0, // don't use whitelist 3704 connection->address_type, // peer address type 3705 connection->address, // peer bd addr 3706 hci_stack->le_own_addr_type, // our addr type: 3707 hci_stack->le_connection_interval_min, // conn interval min 3708 hci_stack->le_connection_interval_max, // conn interval max 3709 hci_stack->le_connection_latency, // conn latency 3710 hci_stack->le_supervision_timeout, // conn latency 3711 hci_stack->le_minimum_ce_length, // min ce length 3712 hci_stack->le_maximum_ce_length // max ce length 3713 ); 3714 connection->state = SENT_CREATE_CONNECTION; 3715 #endif 3716 #endif 3717 break; 3718 } 3719 return true; 3720 3721 #ifdef ENABLE_CLASSIC 3722 case RECEIVED_CONNECTION_REQUEST: 3723 connection->role = HCI_ROLE_SLAVE; 3724 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3725 log_info("sending hci_accept_connection_request"); 3726 connection->state = ACCEPTED_CONNECTION_REQUEST; 3727 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3728 } 3729 return true; 3730 #endif 3731 3732 #ifdef ENABLE_BLE 3733 #ifdef ENABLE_LE_CENTRAL 3734 case SEND_CANCEL_CONNECTION: 3735 connection->state = SENT_CANCEL_CONNECTION; 3736 hci_send_cmd(&hci_le_create_connection_cancel); 3737 return true; 3738 #endif 3739 #endif 3740 case SEND_DISCONNECT: 3741 connection->state = SENT_DISCONNECT; 3742 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3743 return true; 3744 3745 default: 3746 break; 3747 } 3748 3749 // no further commands if connection is about to get shut down 3750 if (connection->state == SENT_DISCONNECT) continue; 3751 3752 if (connection->authentication_flags & READ_RSSI){ 3753 connectionClearAuthenticationFlags(connection, READ_RSSI); 3754 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3755 return true; 3756 } 3757 3758 #ifdef ENABLE_CLASSIC 3759 3760 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3761 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3762 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3763 return true; 3764 } 3765 3766 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3767 log_info("responding to link key request"); 3768 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3769 link_key_t link_key; 3770 link_key_type_t link_key_type; 3771 if ( hci_stack->link_key_db 3772 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3773 && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level)){ 3774 connection->link_key_type = link_key_type; 3775 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3776 } else { 3777 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3778 } 3779 return true; 3780 } 3781 3782 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3783 log_info("denying to pin request"); 3784 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3785 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3786 return true; 3787 } 3788 3789 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3790 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3791 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3792 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3793 // tweak authentication requirements 3794 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3795 if (connection->bonding_flags & BONDING_DEDICATED){ 3796 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3797 } 3798 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3799 authreq |= 1; 3800 } 3801 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3802 } else { 3803 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3804 } 3805 return true; 3806 } 3807 3808 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3809 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3810 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3811 return true; 3812 } 3813 3814 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3815 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3816 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3817 return true; 3818 } 3819 3820 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 3821 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 3822 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3823 return true; 3824 } 3825 3826 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 3827 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3828 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 3829 return true; 3830 } 3831 3832 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3833 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3834 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3835 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3836 return true; 3837 } 3838 3839 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3840 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3841 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3842 return true; 3843 } 3844 3845 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3846 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3847 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3848 return true; 3849 } 3850 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3851 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3852 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3853 return true; 3854 } 3855 #endif 3856 3857 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3858 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3859 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3860 return true; 3861 } 3862 3863 #ifdef ENABLE_CLASSIC 3864 uint16_t sniff_min_interval; 3865 switch (connection->sniff_min_interval){ 3866 case 0: 3867 break; 3868 case 0xffff: 3869 connection->sniff_min_interval = 0; 3870 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3871 return true; 3872 default: 3873 sniff_min_interval = connection->sniff_min_interval; 3874 connection->sniff_min_interval = 0; 3875 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3876 return true; 3877 } 3878 #endif 3879 3880 #ifdef ENABLE_BLE 3881 switch (connection->le_con_parameter_update_state){ 3882 // response to L2CAP CON PARAMETER UPDATE REQUEST 3883 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3884 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3885 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3886 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3887 0x0000, 0xffff); 3888 return true; 3889 case CON_PARAMETER_UPDATE_REPLY: 3890 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3891 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3892 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3893 0x0000, 0xffff); 3894 return true; 3895 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3896 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3897 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3898 return true; 3899 default: 3900 break; 3901 } 3902 if (connection->le_phy_update_all_phys != 0xff){ 3903 uint8_t all_phys = connection->le_phy_update_all_phys; 3904 connection->le_phy_update_all_phys = 0xff; 3905 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); 3906 return true; 3907 } 3908 #endif 3909 } 3910 return false; 3911 } 3912 3913 static void hci_run(void){ 3914 3915 bool done; 3916 3917 // send continuation fragments first, as they block the prepared packet buffer 3918 done = hci_run_acl_fragments(); 3919 if (done) return; 3920 3921 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3922 // send host num completed packets next as they don't require num_cmd_packets > 0 3923 if (!hci_can_send_comand_packet_transport()) return; 3924 if (hci_stack->host_completed_packets){ 3925 hci_host_num_completed_packets(); 3926 return; 3927 } 3928 #endif 3929 3930 if (!hci_can_send_command_packet_now()) return; 3931 3932 // global/non-connection oriented commands 3933 3934 3935 #ifdef ENABLE_CLASSIC 3936 // general gap classic 3937 done = hci_run_general_gap_classic(); 3938 if (done) return; 3939 #endif 3940 3941 #ifdef ENABLE_BLE 3942 // general gap le 3943 done = hci_run_general_gap_le(); 3944 if (done) return; 3945 #endif 3946 3947 // send pending HCI commands 3948 done = hci_run_general_pending_commmands(); 3949 if (done) return; 3950 3951 // stack state sub statemachines 3952 hci_connection_t * connection; 3953 switch (hci_stack->state){ 3954 case HCI_STATE_INITIALIZING: 3955 hci_initializing_run(); 3956 break; 3957 3958 case HCI_STATE_HALTING: 3959 3960 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3961 switch (hci_stack->substate){ 3962 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3963 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3964 3965 #ifdef ENABLE_BLE 3966 #ifdef ENABLE_LE_CENTRAL 3967 // free whitelist entries 3968 { 3969 btstack_linked_list_iterator_t lit; 3970 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3971 while (btstack_linked_list_iterator_has_next(&lit)){ 3972 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3973 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3974 btstack_memory_whitelist_entry_free(entry); 3975 } 3976 } 3977 #endif 3978 #endif 3979 // close all open connections 3980 connection = (hci_connection_t *) hci_stack->connections; 3981 if (connection){ 3982 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3983 if (!hci_can_send_command_packet_now()) return; 3984 3985 // check state 3986 if (connection->state == SENT_DISCONNECT) return; 3987 connection->state = SENT_DISCONNECT; 3988 3989 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3990 3991 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3992 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3993 3994 // ... which would be ignored anyway as we shutdown (free) the connection now 3995 hci_shutdown_connection(connection); 3996 3997 // finally, send the disconnect command 3998 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3999 return; 4000 } 4001 4002 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4003 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4004 log_info("HCI_STATE_HALTING: wait 50 ms"); 4005 hci_stack->substate = HCI_HALTING_W4_TIMER; 4006 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4007 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4008 btstack_run_loop_add_timer(&hci_stack->timeout); 4009 break; 4010 } 4011 4012 /* fall through */ 4013 4014 case HCI_HALTING_CLOSE: 4015 log_info("HCI_STATE_HALTING, calling off"); 4016 4017 // switch mode 4018 hci_power_control_off(); 4019 4020 log_info("HCI_STATE_HALTING, emitting state"); 4021 hci_emit_state(); 4022 log_info("HCI_STATE_HALTING, done"); 4023 break; 4024 4025 case HCI_HALTING_W4_TIMER: 4026 // keep waiting 4027 4028 break; 4029 default: 4030 break; 4031 } 4032 4033 break; 4034 4035 case HCI_STATE_FALLING_ASLEEP: 4036 switch(hci_stack->substate) { 4037 case HCI_FALLING_ASLEEP_DISCONNECT: 4038 log_info("HCI_STATE_FALLING_ASLEEP"); 4039 // close all open connections 4040 connection = (hci_connection_t *) hci_stack->connections; 4041 4042 #ifdef HAVE_PLATFORM_IPHONE_OS 4043 // don't close connections, if H4 supports power management 4044 if (btstack_control_iphone_power_management_enabled()){ 4045 connection = NULL; 4046 } 4047 #endif 4048 if (connection){ 4049 4050 // send disconnect 4051 if (!hci_can_send_command_packet_now()) return; 4052 4053 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4054 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 4055 4056 // send disconnected event right away - causes higher layer connections to get closed, too. 4057 hci_shutdown_connection(connection); 4058 return; 4059 } 4060 4061 if (hci_classic_supported()){ 4062 // disable page and inquiry scan 4063 if (!hci_can_send_command_packet_now()) return; 4064 4065 log_info("HCI_STATE_HALTING, disabling inq scans"); 4066 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4067 4068 // continue in next sub state 4069 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4070 break; 4071 } 4072 4073 /* fall through */ 4074 4075 case HCI_FALLING_ASLEEP_COMPLETE: 4076 log_info("HCI_STATE_HALTING, calling sleep"); 4077 #ifdef HAVE_PLATFORM_IPHONE_OS 4078 // don't actually go to sleep, if H4 supports power management 4079 if (btstack_control_iphone_power_management_enabled()){ 4080 // SLEEP MODE reached 4081 hci_stack->state = HCI_STATE_SLEEPING; 4082 hci_emit_state(); 4083 break; 4084 } 4085 #endif 4086 // switch mode 4087 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4088 hci_emit_state(); 4089 break; 4090 4091 default: 4092 break; 4093 } 4094 break; 4095 4096 default: 4097 break; 4098 } 4099 } 4100 4101 int hci_send_cmd_packet(uint8_t *packet, int size){ 4102 // house-keeping 4103 4104 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 4105 hci_stack->loopback_mode = packet[3]; 4106 } 4107 4108 #ifdef ENABLE_CLASSIC 4109 bd_addr_t addr; 4110 hci_connection_t * conn; 4111 4112 // create_connection? 4113 if (IS_COMMAND(packet, hci_create_connection)){ 4114 reverse_bd_addr(&packet[3], addr); 4115 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4116 4117 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4118 if (!conn){ 4119 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4120 if (!conn){ 4121 // notify client that alloc failed 4122 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4123 return -1; // packet not sent to controller 4124 } 4125 conn->state = SEND_CREATE_CONNECTION; 4126 } 4127 log_info("conn state %u", conn->state); 4128 switch (conn->state){ 4129 // if connection active exists 4130 case OPEN: 4131 // and OPEN, emit connection complete command 4132 hci_emit_connection_complete(addr, conn->con_handle, 0); 4133 return -1; // packet not sent to controller 4134 case RECEIVED_DISCONNECTION_COMPLETE: 4135 // create connection triggered in disconnect complete event, let's do it now 4136 break; 4137 case SEND_CREATE_CONNECTION: 4138 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4139 break; 4140 default: 4141 // otherwise, just ignore as it is already in the open process 4142 return -1; // packet not sent to controller 4143 } 4144 conn->state = SENT_CREATE_CONNECTION; 4145 4146 // track outgoing connection 4147 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4148 (void)memcpy(hci_stack->outgoing_addr, addr, 6); 4149 } 4150 4151 else if (IS_COMMAND(packet, hci_link_key_request_reply)){ 4152 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4153 } 4154 else if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 4155 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4156 } 4157 4158 else if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 4159 if (hci_stack->link_key_db){ 4160 reverse_bd_addr(&packet[3], addr); 4161 hci_stack->link_key_db->delete_link_key(addr); 4162 } 4163 } 4164 4165 else if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 4166 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 4167 reverse_bd_addr(&packet[3], addr); 4168 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4169 if (conn){ 4170 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4171 } 4172 } 4173 4174 else if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 4175 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 4176 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 4177 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 4178 reverse_bd_addr(&packet[3], addr); 4179 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4180 if (conn){ 4181 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4182 } 4183 } 4184 4185 #ifdef ENABLE_SCO_OVER_HCI 4186 // setup_synchronous_connection? Voice setting at offset 22 4187 else if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 4188 // TODO: compare to current setting if sco connection already active 4189 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4190 } 4191 // accept_synchronus_connection? Voice setting at offset 18 4192 else if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 4193 // TODO: compare to current setting if sco connection already active 4194 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4195 } 4196 #endif 4197 #endif 4198 4199 #ifdef ENABLE_BLE 4200 else if (IS_COMMAND(packet, hci_le_set_random_address)){ 4201 hci_stack->le_random_address_set = 1; 4202 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4203 } 4204 #ifdef ENABLE_LE_PERIPHERAL 4205 else if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 4206 hci_stack->le_advertisements_active = packet[3]; 4207 } 4208 #endif 4209 #ifdef ENABLE_LE_CENTRAL 4210 else if (IS_COMMAND(packet, hci_le_create_connection)){ 4211 // white list used? 4212 uint8_t initiator_filter_policy = packet[7]; 4213 switch (initiator_filter_policy){ 4214 case 0: 4215 // whitelist not used 4216 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4217 break; 4218 case 1: 4219 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4220 break; 4221 default: 4222 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4223 break; 4224 } 4225 } 4226 else if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4227 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4228 } 4229 #endif 4230 #endif 4231 4232 hci_stack->num_cmd_packets--; 4233 4234 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4235 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4236 } 4237 4238 // disconnect because of security block 4239 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4240 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4241 if (!connection) return; 4242 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4243 } 4244 4245 4246 // Configure Secure Simple Pairing 4247 4248 #ifdef ENABLE_CLASSIC 4249 4250 // enable will enable SSP during init 4251 void gap_ssp_set_enable(int enable){ 4252 hci_stack->ssp_enable = enable; 4253 } 4254 4255 static int hci_local_ssp_activated(void){ 4256 return gap_ssp_supported() && hci_stack->ssp_enable; 4257 } 4258 4259 // if set, BTstack will respond to io capability request using authentication requirement 4260 void gap_ssp_set_io_capability(int io_capability){ 4261 hci_stack->ssp_io_capability = io_capability; 4262 } 4263 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4264 hci_stack->ssp_authentication_requirement = authentication_requirement; 4265 } 4266 4267 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4268 void gap_ssp_set_auto_accept(int auto_accept){ 4269 hci_stack->ssp_auto_accept = auto_accept; 4270 } 4271 4272 void gap_secure_connections_enable(bool enable){ 4273 hci_stack->secure_connections_enable = enable; 4274 } 4275 4276 #endif 4277 4278 // va_list part of hci_send_cmd 4279 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4280 if (!hci_can_send_command_packet_now()){ 4281 log_error("hci_send_cmd called but cannot send packet now"); 4282 return 0; 4283 } 4284 4285 // for HCI INITIALIZATION 4286 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4287 hci_stack->last_cmd_opcode = cmd->opcode; 4288 4289 hci_reserve_packet_buffer(); 4290 uint8_t * packet = hci_stack->hci_packet_buffer; 4291 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4292 int err = hci_send_cmd_packet(packet, size); 4293 4294 // release packet buffer on error or for synchronous transport implementations 4295 if ((err < 0) || hci_transport_synchronous()){ 4296 hci_release_packet_buffer(); 4297 hci_emit_transport_packet_sent(); 4298 } 4299 4300 return err; 4301 } 4302 4303 /** 4304 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4305 */ 4306 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4307 va_list argptr; 4308 va_start(argptr, cmd); 4309 int res = hci_send_cmd_va_arg(cmd, argptr); 4310 va_end(argptr); 4311 return res; 4312 } 4313 4314 // Create various non-HCI events. 4315 // TODO: generalize, use table similar to hci_create_command 4316 4317 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4318 // dump packet 4319 if (dump) { 4320 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4321 } 4322 4323 // dispatch to all event handlers 4324 btstack_linked_list_iterator_t it; 4325 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4326 while (btstack_linked_list_iterator_has_next(&it)){ 4327 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4328 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4329 } 4330 } 4331 4332 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4333 if (!hci_stack->acl_packet_handler) return; 4334 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4335 } 4336 4337 #ifdef ENABLE_CLASSIC 4338 static void hci_notify_if_sco_can_send_now(void){ 4339 // notify SCO sender if waiting 4340 if (!hci_stack->sco_waiting_for_can_send_now) return; 4341 if (hci_can_send_sco_packet_now()){ 4342 hci_stack->sco_waiting_for_can_send_now = 0; 4343 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4344 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4345 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4346 } 4347 } 4348 4349 // parsing end emitting has been merged to reduce code size 4350 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4351 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4352 4353 uint8_t * eir_data; 4354 ad_context_t context; 4355 const uint8_t * name; 4356 uint8_t name_len; 4357 4358 if (size < 3) return; 4359 4360 int event_type = hci_event_packet_get_type(packet); 4361 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4362 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4363 4364 switch (event_type){ 4365 case HCI_EVENT_INQUIRY_RESULT: 4366 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4367 if (size != (3 + (num_responses * 14))) return; 4368 break; 4369 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4370 if (size != 257) return; 4371 if (num_responses != 1) return; 4372 break; 4373 default: 4374 return; 4375 } 4376 4377 // event[1] is set at the end 4378 int i; 4379 for (i=0; i<num_responses;i++){ 4380 memset(event, 0, sizeof(event)); 4381 event[0] = GAP_EVENT_INQUIRY_RESULT; 4382 uint8_t event_size = 18; // if name is not set by EIR 4383 4384 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4385 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4386 (void)memcpy(&event[9], 4387 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4388 3); // class of device 4389 (void)memcpy(&event[12], 4390 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4391 2); // clock offset 4392 4393 switch (event_type){ 4394 case HCI_EVENT_INQUIRY_RESULT: 4395 // 14,15,16,17 = 0, size 18 4396 break; 4397 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4398 event[14] = 1; 4399 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4400 // 16,17 = 0, size 18 4401 break; 4402 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4403 event[14] = 1; 4404 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4405 // EIR packets only contain a single inquiry response 4406 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4407 name = NULL; 4408 // Iterate over EIR data 4409 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4410 uint8_t data_type = ad_iterator_get_data_type(&context); 4411 uint8_t data_size = ad_iterator_get_data_len(&context); 4412 const uint8_t * data = ad_iterator_get_data(&context); 4413 // Prefer Complete Local Name over Shortend Local Name 4414 switch (data_type){ 4415 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4416 if (name) continue; 4417 /* fall through */ 4418 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4419 name = data; 4420 name_len = data_size; 4421 break; 4422 default: 4423 break; 4424 } 4425 } 4426 if (name){ 4427 event[16] = 1; 4428 // truncate name if needed 4429 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4430 event[17] = len; 4431 (void)memcpy(&event[18], name, len); 4432 event_size += len; 4433 } 4434 break; 4435 } 4436 event[1] = event_size - 2; 4437 hci_emit_event(event, event_size, 1); 4438 } 4439 } 4440 #endif 4441 4442 void hci_emit_state(void){ 4443 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4444 uint8_t event[3]; 4445 event[0] = BTSTACK_EVENT_STATE; 4446 event[1] = sizeof(event) - 2; 4447 event[2] = hci_stack->state; 4448 hci_emit_event(event, sizeof(event), 1); 4449 } 4450 4451 #ifdef ENABLE_CLASSIC 4452 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4453 uint8_t event[13]; 4454 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4455 event[1] = sizeof(event) - 2; 4456 event[2] = status; 4457 little_endian_store_16(event, 3, con_handle); 4458 reverse_bd_addr(address, &event[5]); 4459 event[11] = 1; // ACL connection 4460 event[12] = 0; // encryption disabled 4461 hci_emit_event(event, sizeof(event), 1); 4462 } 4463 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4464 if (disable_l2cap_timeouts) return; 4465 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4466 uint8_t event[4]; 4467 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4468 event[1] = sizeof(event) - 2; 4469 little_endian_store_16(event, 2, conn->con_handle); 4470 hci_emit_event(event, sizeof(event), 1); 4471 } 4472 #endif 4473 4474 #ifdef ENABLE_BLE 4475 #ifdef ENABLE_LE_CENTRAL 4476 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4477 uint8_t event[21]; 4478 event[0] = HCI_EVENT_LE_META; 4479 event[1] = sizeof(event) - 2; 4480 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4481 event[3] = status; 4482 little_endian_store_16(event, 4, con_handle); 4483 event[6] = 0; // TODO: role 4484 event[7] = address_type; 4485 reverse_bd_addr(address, &event[8]); 4486 little_endian_store_16(event, 14, 0); // interval 4487 little_endian_store_16(event, 16, 0); // latency 4488 little_endian_store_16(event, 18, 0); // supervision timeout 4489 event[20] = 0; // master clock accuracy 4490 hci_emit_event(event, sizeof(event), 1); 4491 } 4492 #endif 4493 #endif 4494 4495 static void hci_emit_transport_packet_sent(void){ 4496 // notify upper stack that it might be possible to send again 4497 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4498 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4499 } 4500 4501 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4502 uint8_t event[6]; 4503 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4504 event[1] = sizeof(event) - 2; 4505 event[2] = 0; // status = OK 4506 little_endian_store_16(event, 3, con_handle); 4507 event[5] = reason; 4508 hci_emit_event(event, sizeof(event), 1); 4509 } 4510 4511 static void hci_emit_nr_connections_changed(void){ 4512 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4513 uint8_t event[3]; 4514 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4515 event[1] = sizeof(event) - 2; 4516 event[2] = nr_hci_connections(); 4517 hci_emit_event(event, sizeof(event), 1); 4518 } 4519 4520 static void hci_emit_hci_open_failed(void){ 4521 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4522 uint8_t event[2]; 4523 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4524 event[1] = sizeof(event) - 2; 4525 hci_emit_event(event, sizeof(event), 1); 4526 } 4527 4528 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4529 log_info("hci_emit_dedicated_bonding_result %u ", status); 4530 uint8_t event[9]; 4531 int pos = 0; 4532 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4533 event[pos++] = sizeof(event) - 2; 4534 event[pos++] = status; 4535 reverse_bd_addr(address, &event[pos]); 4536 hci_emit_event(event, sizeof(event), 1); 4537 } 4538 4539 4540 #ifdef ENABLE_CLASSIC 4541 4542 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4543 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4544 uint8_t event[5]; 4545 int pos = 0; 4546 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4547 event[pos++] = sizeof(event) - 2; 4548 little_endian_store_16(event, 2, con_handle); 4549 pos += 2; 4550 event[pos++] = level; 4551 hci_emit_event(event, sizeof(event), 1); 4552 } 4553 4554 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4555 if (!connection) return LEVEL_0; 4556 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4557 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4558 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4559 // LEVEL 4 always requires 128 bit encrytion key size 4560 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4561 security_level = LEVEL_3; 4562 } 4563 return security_level; 4564 } 4565 4566 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4567 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4568 uint8_t event[3]; 4569 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4570 event[1] = sizeof(event) - 2; 4571 event[2] = enabled; 4572 hci_emit_event(event, sizeof(event), 1); 4573 } 4574 4575 // query if remote side supports eSCO 4576 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4577 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4578 if (!connection) return 0; 4579 return (connection->remote_supported_features[0] & 1) != 0; 4580 } 4581 4582 static bool hci_ssp_supported(hci_connection_t * connection){ 4583 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4584 return (connection->bonding_flags & mask) == mask; 4585 } 4586 4587 // query if remote side supports SSP 4588 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4589 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4590 if (!connection) return 0; 4591 return hci_ssp_supported(connection) ? 1 : 0; 4592 } 4593 4594 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4595 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4596 } 4597 4598 // GAP API 4599 /** 4600 * @bbrief enable/disable bonding. default is enabled 4601 * @praram enabled 4602 */ 4603 void gap_set_bondable_mode(int enable){ 4604 hci_stack->bondable = enable ? 1 : 0; 4605 } 4606 /** 4607 * @brief Get bondable mode. 4608 * @return 1 if bondable 4609 */ 4610 int gap_get_bondable_mode(void){ 4611 return hci_stack->bondable; 4612 } 4613 4614 /** 4615 * @brief map link keys to security levels 4616 */ 4617 gap_security_level_t gap_security_level_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 return LEVEL_4; 4621 case COMBINATION_KEY: 4622 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4623 return LEVEL_3; 4624 default: 4625 return LEVEL_2; 4626 } 4627 } 4628 4629 /** 4630 * @brief map link keys to secure connection yes/no 4631 */ 4632 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4633 switch (link_key_type){ 4634 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4635 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4636 return 1; 4637 default: 4638 return 0; 4639 } 4640 } 4641 4642 /** 4643 * @brief map link keys to authenticated 4644 */ 4645 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4646 switch (link_key_type){ 4647 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4648 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4649 return 1; 4650 default: 4651 return 0; 4652 } 4653 } 4654 4655 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4656 log_info("gap_mitm_protection_required_for_security_level %u", level); 4657 return level > LEVEL_2; 4658 } 4659 4660 /** 4661 * @brief get current security level 4662 */ 4663 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4664 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4665 if (!connection) return LEVEL_0; 4666 return gap_security_level_for_connection(connection); 4667 } 4668 4669 /** 4670 * @brief request connection to device to 4671 * @result GAP_AUTHENTICATION_RESULT 4672 */ 4673 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4674 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4675 if (!connection){ 4676 hci_emit_security_level(con_handle, LEVEL_0); 4677 return; 4678 } 4679 gap_security_level_t current_level = gap_security_level(con_handle); 4680 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4681 requested_level, connection->requested_security_level, current_level); 4682 4683 // assumption: earlier requested security higher than current level => security request is active 4684 if (current_level < connection->requested_security_level){ 4685 if (connection->requested_security_level < requested_level){ 4686 // increase requested level as new level is higher 4687 4688 // TODO: handle re-authentication when done 4689 4690 connection->requested_security_level = requested_level; 4691 } 4692 return; 4693 } 4694 4695 // no request active, notify if security sufficient 4696 if (requested_level <= current_level){ 4697 hci_emit_security_level(con_handle, current_level); 4698 return; 4699 } 4700 4701 // start pairing to increase security level 4702 connection->requested_security_level = requested_level; 4703 4704 #if 0 4705 // sending encryption request without a link key results in an error. 4706 // TODO: figure out how to use it properly 4707 4708 // would enabling ecnryption suffice (>= LEVEL_2)? 4709 if (hci_stack->link_key_db){ 4710 link_key_type_t link_key_type; 4711 link_key_t link_key; 4712 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4713 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4714 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4715 return; 4716 } 4717 } 4718 } 4719 #endif 4720 4721 // start to authenticate connection 4722 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4723 hci_run(); 4724 } 4725 4726 /** 4727 * @brief start dedicated bonding with device. disconnect after bonding 4728 * @param device 4729 * @param request MITM protection 4730 * @result GAP_DEDICATED_BONDING_COMPLETE 4731 */ 4732 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4733 4734 // create connection state machine 4735 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4736 4737 if (!connection){ 4738 return BTSTACK_MEMORY_ALLOC_FAILED; 4739 } 4740 4741 // delete linkn key 4742 gap_drop_link_key_for_bd_addr(device); 4743 4744 // configure LEVEL_2/3, dedicated bonding 4745 connection->state = SEND_CREATE_CONNECTION; 4746 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4747 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4748 connection->bonding_flags = BONDING_DEDICATED; 4749 4750 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4751 4752 // handle: connnection failure (connection complete != ok) 4753 // handle: authentication failure 4754 // handle: disconnect on done 4755 4756 hci_run(); 4757 4758 return 0; 4759 } 4760 #endif 4761 4762 void gap_set_local_name(const char * local_name){ 4763 hci_stack->local_name = local_name; 4764 } 4765 4766 4767 #ifdef ENABLE_BLE 4768 4769 #ifdef ENABLE_LE_CENTRAL 4770 void gap_start_scan(void){ 4771 hci_stack->le_scanning_enabled = 1; 4772 hci_run(); 4773 } 4774 4775 void gap_stop_scan(void){ 4776 hci_stack->le_scanning_enabled = 0; 4777 hci_run(); 4778 } 4779 4780 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4781 hci_stack->le_scan_type = scan_type; 4782 hci_stack->le_scan_interval = scan_interval; 4783 hci_stack->le_scan_window = scan_window; 4784 hci_run(); 4785 } 4786 4787 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4788 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4789 if (!conn){ 4790 log_info("gap_connect: no connection exists yet, creating context"); 4791 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4792 if (!conn){ 4793 // notify client that alloc failed 4794 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4795 log_info("gap_connect: failed to alloc hci_connection_t"); 4796 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4797 } 4798 conn->state = SEND_CREATE_CONNECTION; 4799 log_info("gap_connect: send create connection next"); 4800 hci_run(); 4801 return ERROR_CODE_SUCCESS; 4802 } 4803 4804 if (!hci_is_le_connection(conn) || 4805 (conn->state == SEND_CREATE_CONNECTION) || 4806 (conn->state == SENT_CREATE_CONNECTION)) { 4807 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4808 log_error("gap_connect: classic connection or connect is already being created"); 4809 return GATT_CLIENT_IN_WRONG_STATE; 4810 } 4811 4812 // check if connection was just disconnected 4813 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4814 log_info("gap_connect: send create connection (again)"); 4815 conn->state = SEND_CREATE_CONNECTION; 4816 hci_run(); 4817 return ERROR_CODE_SUCCESS; 4818 } 4819 4820 log_info("gap_connect: context exists with state %u", conn->state); 4821 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4822 hci_run(); 4823 return ERROR_CODE_SUCCESS; 4824 } 4825 4826 // @assumption: only a single outgoing LE Connection exists 4827 static hci_connection_t * gap_get_outgoing_connection(void){ 4828 btstack_linked_item_t *it; 4829 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4830 hci_connection_t * conn = (hci_connection_t *) it; 4831 if (!hci_is_le_connection(conn)) continue; 4832 switch (conn->state){ 4833 case SEND_CREATE_CONNECTION: 4834 case SENT_CREATE_CONNECTION: 4835 case SENT_CANCEL_CONNECTION: 4836 return conn; 4837 default: 4838 break; 4839 }; 4840 } 4841 return NULL; 4842 } 4843 4844 uint8_t gap_connect_cancel(void){ 4845 hci_connection_t * conn = gap_get_outgoing_connection(); 4846 if (!conn) return 0; 4847 switch (conn->state){ 4848 case SEND_CREATE_CONNECTION: 4849 // skip sending create connection and emit event instead 4850 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4851 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4852 btstack_memory_hci_connection_free( conn ); 4853 break; 4854 case SENT_CREATE_CONNECTION: 4855 // request to send cancel connection 4856 conn->state = SEND_CANCEL_CONNECTION; 4857 hci_run(); 4858 break; 4859 default: 4860 break; 4861 } 4862 return 0; 4863 } 4864 #endif 4865 4866 #ifdef ENABLE_LE_CENTRAL 4867 /** 4868 * @brief Set connection parameters for outgoing connections 4869 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4870 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4871 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4872 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4873 * @param conn_latency, default: 4 4874 * @param supervision_timeout (unit: 10ms), default: 720 ms 4875 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4876 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4877 */ 4878 4879 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4880 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4881 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4882 hci_stack->le_connection_scan_interval = conn_scan_interval; 4883 hci_stack->le_connection_scan_window = conn_scan_window; 4884 hci_stack->le_connection_interval_min = conn_interval_min; 4885 hci_stack->le_connection_interval_max = conn_interval_max; 4886 hci_stack->le_connection_latency = conn_latency; 4887 hci_stack->le_supervision_timeout = supervision_timeout; 4888 hci_stack->le_minimum_ce_length = min_ce_length; 4889 hci_stack->le_maximum_ce_length = max_ce_length; 4890 } 4891 #endif 4892 4893 /** 4894 * @brief Updates the connection parameters for a given LE connection 4895 * @param handle 4896 * @param conn_interval_min (unit: 1.25ms) 4897 * @param conn_interval_max (unit: 1.25ms) 4898 * @param conn_latency 4899 * @param supervision_timeout (unit: 10ms) 4900 * @returns 0 if ok 4901 */ 4902 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4903 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4904 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4905 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4906 connection->le_conn_interval_min = conn_interval_min; 4907 connection->le_conn_interval_max = conn_interval_max; 4908 connection->le_conn_latency = conn_latency; 4909 connection->le_supervision_timeout = supervision_timeout; 4910 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4911 hci_run(); 4912 return 0; 4913 } 4914 4915 /** 4916 * @brief Request an update of the connection parameter for a given LE connection 4917 * @param handle 4918 * @param conn_interval_min (unit: 1.25ms) 4919 * @param conn_interval_max (unit: 1.25ms) 4920 * @param conn_latency 4921 * @param supervision_timeout (unit: 10ms) 4922 * @returns 0 if ok 4923 */ 4924 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4925 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4926 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4927 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4928 connection->le_conn_interval_min = conn_interval_min; 4929 connection->le_conn_interval_max = conn_interval_max; 4930 connection->le_conn_latency = conn_latency; 4931 connection->le_supervision_timeout = supervision_timeout; 4932 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4933 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 4934 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 4935 return 0; 4936 } 4937 4938 #ifdef ENABLE_LE_PERIPHERAL 4939 4940 static void gap_advertisments_changed(void){ 4941 // disable advertisements before updating adv, scan data, or adv params 4942 if (hci_stack->le_advertisements_active){ 4943 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4944 } 4945 hci_run(); 4946 } 4947 4948 /** 4949 * @brief Set Advertisement Data 4950 * @param advertising_data_length 4951 * @param advertising_data (max 31 octets) 4952 * @note data is not copied, pointer has to stay valid 4953 */ 4954 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4955 hci_stack->le_advertisements_data_len = advertising_data_length; 4956 hci_stack->le_advertisements_data = advertising_data; 4957 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4958 gap_advertisments_changed(); 4959 } 4960 4961 /** 4962 * @brief Set Scan Response Data 4963 * @param advertising_data_length 4964 * @param advertising_data (max 31 octets) 4965 * @note data is not copied, pointer has to stay valid 4966 */ 4967 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4968 hci_stack->le_scan_response_data_len = scan_response_data_length; 4969 hci_stack->le_scan_response_data = scan_response_data; 4970 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4971 gap_advertisments_changed(); 4972 } 4973 4974 /** 4975 * @brief Set Advertisement Parameters 4976 * @param adv_int_min 4977 * @param adv_int_max 4978 * @param adv_type 4979 * @param direct_address_type 4980 * @param direct_address 4981 * @param channel_map 4982 * @param filter_policy 4983 * 4984 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4985 */ 4986 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4987 uint8_t direct_address_typ, bd_addr_t direct_address, 4988 uint8_t channel_map, uint8_t filter_policy) { 4989 4990 hci_stack->le_advertisements_interval_min = adv_int_min; 4991 hci_stack->le_advertisements_interval_max = adv_int_max; 4992 hci_stack->le_advertisements_type = adv_type; 4993 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4994 hci_stack->le_advertisements_channel_map = channel_map; 4995 hci_stack->le_advertisements_filter_policy = filter_policy; 4996 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 4997 6); 4998 4999 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5000 gap_advertisments_changed(); 5001 } 5002 5003 /** 5004 * @brief Enable/Disable Advertisements 5005 * @param enabled 5006 */ 5007 void gap_advertisements_enable(int enabled){ 5008 hci_stack->le_advertisements_enabled = enabled; 5009 if (enabled && !hci_stack->le_advertisements_active){ 5010 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 5011 } 5012 if (!enabled && hci_stack->le_advertisements_active){ 5013 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 5014 } 5015 hci_run(); 5016 } 5017 5018 #endif 5019 5020 void hci_le_set_own_address_type(uint8_t own_address_type){ 5021 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5022 if (own_address_type == hci_stack->le_own_addr_type) return; 5023 hci_stack->le_own_addr_type = own_address_type; 5024 5025 #ifdef ENABLE_LE_PERIPHERAL 5026 // update advertisement parameters, too 5027 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5028 gap_advertisments_changed(); 5029 #endif 5030 #ifdef ENABLE_LE_CENTRAL 5031 // note: we don't update scan parameters or modify ongoing connection attempts 5032 #endif 5033 } 5034 5035 #endif 5036 5037 uint8_t gap_disconnect(hci_con_handle_t handle){ 5038 hci_connection_t * conn = hci_connection_for_handle(handle); 5039 if (!conn){ 5040 hci_emit_disconnection_complete(handle, 0); 5041 return 0; 5042 } 5043 // ignore if already disconnected 5044 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5045 return 0; 5046 } 5047 conn->state = SEND_DISCONNECT; 5048 hci_run(); 5049 return 0; 5050 } 5051 5052 int gap_read_rssi(hci_con_handle_t con_handle){ 5053 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5054 if (hci_connection == NULL) return 0; 5055 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5056 hci_run(); 5057 return 1; 5058 } 5059 5060 /** 5061 * @brief Get connection type 5062 * @param con_handle 5063 * @result connection_type 5064 */ 5065 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5066 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5067 if (!conn) return GAP_CONNECTION_INVALID; 5068 switch (conn->address_type){ 5069 case BD_ADDR_TYPE_LE_PUBLIC: 5070 case BD_ADDR_TYPE_LE_RANDOM: 5071 return GAP_CONNECTION_LE; 5072 case BD_ADDR_TYPE_SCO: 5073 return GAP_CONNECTION_SCO; 5074 case BD_ADDR_TYPE_ACL: 5075 return GAP_CONNECTION_ACL; 5076 default: 5077 return GAP_CONNECTION_INVALID; 5078 } 5079 } 5080 5081 #ifdef ENABLE_BLE 5082 5083 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){ 5084 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5085 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5086 5087 conn->le_phy_update_all_phys = all_phys; 5088 conn->le_phy_update_tx_phys = tx_phys; 5089 conn->le_phy_update_rx_phys = rx_phys; 5090 conn->le_phy_update_phy_options = phy_options; 5091 5092 hci_run(); 5093 5094 return 0; 5095 } 5096 5097 #ifdef ENABLE_LE_CENTRAL 5098 /** 5099 * @brief Auto Connection Establishment - Start Connecting to device 5100 * @param address_typ 5101 * @param address 5102 * @returns 0 if ok 5103 */ 5104 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 5105 // check capacity 5106 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 5107 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 5108 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5109 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5110 entry->address_type = address_type; 5111 (void)memcpy(entry->address, address, 6); 5112 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5113 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5114 hci_run(); 5115 return 0; 5116 } 5117 5118 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5119 btstack_linked_list_iterator_t it; 5120 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5121 while (btstack_linked_list_iterator_has_next(&it)){ 5122 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5123 if (entry->address_type != address_type) continue; 5124 if (memcmp(entry->address, address, 6) != 0) continue; 5125 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5126 // remove from controller if already present 5127 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5128 continue; 5129 } 5130 // direclty remove entry from whitelist 5131 btstack_linked_list_iterator_remove(&it); 5132 btstack_memory_whitelist_entry_free(entry); 5133 } 5134 } 5135 5136 /** 5137 * @brief Auto Connection Establishment - Stop Connecting to device 5138 * @param address_typ 5139 * @param address 5140 * @returns 0 if ok 5141 */ 5142 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5143 hci_remove_from_whitelist(address_type, address); 5144 hci_run(); 5145 return 0; 5146 } 5147 5148 /** 5149 * @brief Auto Connection Establishment - Stop everything 5150 * @note Convenience function to stop all active auto connection attempts 5151 */ 5152 void gap_auto_connection_stop_all(void){ 5153 btstack_linked_list_iterator_t it; 5154 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5155 while (btstack_linked_list_iterator_has_next(&it)){ 5156 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5157 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5158 // remove from controller if already present 5159 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5160 continue; 5161 } 5162 // directly remove entry from whitelist 5163 btstack_linked_list_iterator_remove(&it); 5164 btstack_memory_whitelist_entry_free(entry); 5165 } 5166 hci_run(); 5167 } 5168 5169 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5170 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5171 if (!conn) return 0; 5172 return conn->le_connection_interval; 5173 } 5174 #endif 5175 #endif 5176 5177 #ifdef ENABLE_CLASSIC 5178 /** 5179 * @brief Set Extended Inquiry Response data 5180 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5181 * @note has to be done before stack starts up 5182 */ 5183 void gap_set_extended_inquiry_response(const uint8_t * data){ 5184 hci_stack->eir_data = data; 5185 } 5186 5187 /** 5188 * @brief Start GAP Classic Inquiry 5189 * @param duration in 1.28s units 5190 * @return 0 if ok 5191 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5192 */ 5193 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5194 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5195 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5196 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5197 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5198 } 5199 hci_stack->inquiry_state = duration_in_1280ms_units; 5200 hci_run(); 5201 return 0; 5202 } 5203 5204 /** 5205 * @brief Stop GAP Classic Inquiry 5206 * @returns 0 if ok 5207 */ 5208 int gap_inquiry_stop(void){ 5209 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5210 // emit inquiry complete event, before it even started 5211 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5212 hci_emit_event(event, sizeof(event), 1); 5213 return 0; 5214 } 5215 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5216 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5217 hci_run(); 5218 return 0; 5219 } 5220 5221 5222 /** 5223 * @brief Remote Name Request 5224 * @param addr 5225 * @param page_scan_repetition_mode 5226 * @param clock_offset only used when bit 15 is set 5227 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5228 */ 5229 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5230 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5231 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5232 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5233 hci_stack->remote_name_clock_offset = clock_offset; 5234 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5235 hci_run(); 5236 return 0; 5237 } 5238 5239 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5240 hci_stack->gap_pairing_state = state; 5241 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5242 hci_run(); 5243 return 0; 5244 } 5245 5246 /** 5247 * @brief Legacy Pairing Pin Code Response 5248 * @param addr 5249 * @param pin 5250 * @return 0 if ok 5251 */ 5252 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5253 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5254 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5255 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5256 } 5257 5258 /** 5259 * @brief Abort Legacy Pairing 5260 * @param addr 5261 * @param pin 5262 * @return 0 if ok 5263 */ 5264 int gap_pin_code_negative(bd_addr_t addr){ 5265 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5266 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5267 } 5268 5269 /** 5270 * @brief SSP Passkey Response 5271 * @param addr 5272 * @param passkey 5273 * @return 0 if ok 5274 */ 5275 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5276 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5277 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5278 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5279 } 5280 5281 /** 5282 * @brief Abort SSP Passkey Entry/Pairing 5283 * @param addr 5284 * @param pin 5285 * @return 0 if ok 5286 */ 5287 int gap_ssp_passkey_negative(bd_addr_t addr){ 5288 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5289 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5290 } 5291 5292 /** 5293 * @brief Accept SSP Numeric Comparison 5294 * @param addr 5295 * @param passkey 5296 * @return 0 if ok 5297 */ 5298 int gap_ssp_confirmation_response(bd_addr_t addr){ 5299 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5300 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5301 } 5302 5303 /** 5304 * @brief Abort SSP Numeric Comparison/Pairing 5305 * @param addr 5306 * @param pin 5307 * @return 0 if ok 5308 */ 5309 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5310 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5311 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5312 } 5313 5314 /** 5315 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5316 * @param inquiry_mode see bluetooth_defines.h 5317 */ 5318 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5319 hci_stack->inquiry_mode = mode; 5320 } 5321 5322 /** 5323 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5324 */ 5325 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5326 hci_stack->sco_voice_setting = voice_setting; 5327 } 5328 5329 /** 5330 * @brief Get SCO Voice Setting 5331 * @return current voice setting 5332 */ 5333 uint16_t hci_get_sco_voice_setting(void){ 5334 return hci_stack->sco_voice_setting; 5335 } 5336 5337 static int hci_have_usb_transport(void){ 5338 if (!hci_stack->hci_transport) return 0; 5339 const char * transport_name = hci_stack->hci_transport->name; 5340 if (!transport_name) return 0; 5341 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5342 } 5343 5344 /** @brief Get SCO packet length for current SCO Voice setting 5345 * @note Using SCO packets of the exact length is required for USB transfer 5346 * @return Length of SCO packets in bytes (not audio frames) 5347 */ 5348 int hci_get_sco_packet_length(void){ 5349 int sco_packet_length = 0; 5350 5351 #ifdef ENABLE_SCO_OVER_HCI 5352 5353 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5354 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5355 5356 if (hci_have_usb_transport()){ 5357 // see Core Spec for H2 USB Transfer. 5358 // 3 byte SCO header + 24 bytes per connection 5359 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5360 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5361 } else { 5362 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5363 sco_packet_length = 3 + 60 * multiplier; 5364 // assert that it still fits inside an SCO buffer 5365 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5366 sco_packet_length = 3 + 60; 5367 } 5368 } 5369 #endif 5370 return sco_packet_length; 5371 } 5372 5373 /** 5374 * @brief Sets the master/slave policy 5375 * @param policy (0: attempt to become master, 1: let connecting device decide) 5376 */ 5377 void hci_set_master_slave_policy(uint8_t policy){ 5378 hci_stack->master_slave_policy = policy; 5379 } 5380 5381 #endif 5382 5383 HCI_STATE hci_get_state(void){ 5384 return hci_stack->state; 5385 } 5386 5387 #ifdef ENABLE_CLASSIC 5388 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5389 hci_stack->gap_classic_accept_callback = accept_callback; 5390 } 5391 #endif 5392 5393 /** 5394 * @brief Set callback for Bluetooth Hardware Error 5395 */ 5396 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5397 hci_stack->hardware_error_callback = fn; 5398 } 5399 5400 void hci_disconnect_all(void){ 5401 btstack_linked_list_iterator_t it; 5402 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5403 while (btstack_linked_list_iterator_has_next(&it)){ 5404 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5405 if (con->state == SENT_DISCONNECT) continue; 5406 con->state = SEND_DISCONNECT; 5407 } 5408 hci_run(); 5409 } 5410 5411 uint16_t hci_get_manufacturer(void){ 5412 return hci_stack->manufacturer; 5413 } 5414 5415 #ifdef ENABLE_BLE 5416 5417 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5418 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5419 if (!hci_con) return NULL; 5420 return &hci_con->sm_connection; 5421 } 5422 5423 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5424 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5425 5426 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5427 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5428 if (hci_connection == NULL) return 0; 5429 if (hci_is_le_connection(hci_connection)){ 5430 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5431 if (sm_conn->sm_connection_encrypted) { 5432 return sm_conn->sm_actual_encryption_key_size; 5433 } 5434 } 5435 #ifdef ENABLE_CLASSIC 5436 else { 5437 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5438 return hci_connection->encryption_key_size; 5439 } 5440 } 5441 #endif 5442 return 0; 5443 } 5444 5445 int gap_authenticated(hci_con_handle_t con_handle){ 5446 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5447 if (hci_connection == NULL) return 0; 5448 5449 switch (hci_connection->address_type){ 5450 case BD_ADDR_TYPE_LE_PUBLIC: 5451 case BD_ADDR_TYPE_LE_RANDOM: 5452 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5453 return hci_connection->sm_connection.sm_connection_authenticated; 5454 #ifdef ENABLE_CLASSIC 5455 case BD_ADDR_TYPE_SCO: 5456 case BD_ADDR_TYPE_ACL: 5457 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5458 #endif 5459 default: 5460 return 0; 5461 } 5462 } 5463 5464 int gap_secure_connection(hci_con_handle_t con_handle){ 5465 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5466 if (hci_connection == NULL) return 0; 5467 5468 switch (hci_connection->address_type){ 5469 case BD_ADDR_TYPE_LE_PUBLIC: 5470 case BD_ADDR_TYPE_LE_RANDOM: 5471 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5472 return hci_connection->sm_connection.sm_connection_sc; 5473 #ifdef ENABLE_CLASSIC 5474 case BD_ADDR_TYPE_SCO: 5475 case BD_ADDR_TYPE_ACL: 5476 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5477 #endif 5478 default: 5479 return 0; 5480 } 5481 } 5482 5483 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5484 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5485 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5486 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5487 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5488 return sm_conn->sm_connection_authorization_state; 5489 } 5490 #endif 5491 5492 #ifdef ENABLE_CLASSIC 5493 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){ 5494 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5495 if (!conn) return GAP_CONNECTION_INVALID; 5496 conn->sniff_min_interval = sniff_min_interval; 5497 conn->sniff_max_interval = sniff_max_interval; 5498 conn->sniff_attempt = sniff_attempt; 5499 conn->sniff_timeout = sniff_timeout; 5500 hci_run(); 5501 return 0; 5502 } 5503 5504 /** 5505 * @brief Exit Sniff mode 5506 * @param con_handle 5507 @ @return 0 if ok 5508 */ 5509 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5510 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5511 if (!conn) return GAP_CONNECTION_INVALID; 5512 conn->sniff_min_interval = 0xffff; 5513 hci_run(); 5514 return 0; 5515 } 5516 #endif 5517 5518 void hci_halting_defer(void){ 5519 if (hci_stack->state != HCI_STATE_HALTING) return; 5520 switch (hci_stack->substate){ 5521 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5522 case HCI_HALTING_CLOSE: 5523 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5524 break; 5525 default: 5526 break; 5527 } 5528 } 5529 5530 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5531 void hci_setup_test_connections_fuzz(void){ 5532 hci_connection_t * conn; 5533 5534 // default address: 66:55:44:33:00:01 5535 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5536 5537 // setup Controller info 5538 hci_stack->num_cmd_packets = 255; 5539 hci_stack->acl_packets_total_num = 255; 5540 5541 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5542 addr[5] = 0x01; 5543 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5544 conn->con_handle = addr[5]; 5545 conn->role = HCI_ROLE_SLAVE; 5546 conn->state = RECEIVED_CONNECTION_REQUEST; 5547 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5548 5549 // setup incoming Classic SCO connection with con handle 0x0002 5550 addr[5] = 0x02; 5551 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5552 conn->con_handle = addr[5]; 5553 conn->role = HCI_ROLE_SLAVE; 5554 conn->state = RECEIVED_CONNECTION_REQUEST; 5555 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5556 5557 // setup ready Classic ACL connection with con handle 0x0003 5558 addr[5] = 0x03; 5559 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5560 conn->con_handle = addr[5]; 5561 conn->role = HCI_ROLE_SLAVE; 5562 conn->state = OPEN; 5563 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5564 5565 // setup ready Classic SCO connection with con handle 0x0004 5566 addr[5] = 0x04; 5567 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5568 conn->con_handle = addr[5]; 5569 conn->role = HCI_ROLE_SLAVE; 5570 conn->state = OPEN; 5571 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5572 5573 // setup ready LE ACL connection with con handle 0x005 and public address 5574 addr[5] = 0x05; 5575 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5576 conn->con_handle = addr[5]; 5577 conn->role = HCI_ROLE_SLAVE; 5578 conn->state = OPEN; 5579 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5580 } 5581 5582 void hci_free_connections_fuzz(void){ 5583 btstack_linked_list_iterator_t it; 5584 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5585 while (btstack_linked_list_iterator_has_next(&it)){ 5586 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5587 btstack_linked_list_iterator_remove(&it); 5588 btstack_memory_hci_connection_free(con); 5589 } 5590 } 5591 void hci_simulate_working_fuzz(void){ 5592 hci_init_done(); 5593 hci_stack->num_cmd_packets = 255; 5594 } 5595 #endif 5596