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 /* 39 * hci.c 40 * 41 * Created by Matthias Ringwald on 4/29/09. 42 * 43 */ 44 45 #include "btstack-config.h" 46 47 #include "hci.h" 48 #include "gap.h" 49 50 #ifdef HAVE_BLE 51 #include "gap_le.h" 52 #endif 53 54 #include <stdarg.h> 55 #include <string.h> 56 #include <stdio.h> 57 #include <inttypes.h> 58 59 #ifndef EMBEDDED 60 #ifdef _WIN32 61 #include "Winsock2.h" 62 #else 63 #include <unistd.h> // gethostbyname 64 #endif 65 #include <btstack/version.h> 66 #endif 67 68 #include "btstack_memory.h" 69 #include "debug.h" 70 #include "hci_dump.h" 71 72 #include <btstack/linked_list.h> 73 #include <btstack/hci_cmds.h> 74 75 #define HCI_CONNECTION_TIMEOUT_MS 10000 76 77 #ifdef USE_BLUETOOL 78 #include "../platforms/ios/src/bt_control_iphone.h" 79 #endif 80 81 static void hci_update_scan_enable(void); 82 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 83 static void hci_connection_timeout_handler(timer_source_t *timer); 84 static void hci_connection_timestamp(hci_connection_t *connection); 85 static int hci_power_control_on(void); 86 static void hci_power_control_off(void); 87 static void hci_state_reset(void); 88 89 #ifdef HAVE_BLE 90 // called from test/ble_client/advertising_data_parser.c 91 void le_handle_advertisement_report(uint8_t *packet, int size); 92 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 93 #endif 94 95 // the STACK is here 96 #ifndef HAVE_MALLOC 97 static hci_stack_t hci_stack_static; 98 #endif 99 static hci_stack_t * hci_stack = NULL; 100 101 // test helper 102 static uint8_t disable_l2cap_timeouts = 0; 103 104 /** 105 * create connection for given address 106 * 107 * @return connection OR NULL, if no memory left 108 */ 109 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 110 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 111 hci_connection_t * conn = btstack_memory_hci_connection_get(); 112 if (!conn) return NULL; 113 memset(conn, 0, sizeof(hci_connection_t)); 114 BD_ADDR_COPY(conn->address, addr); 115 conn->address_type = addr_type; 116 conn->con_handle = 0xffff; 117 conn->authentication_flags = AUTH_FLAGS_NONE; 118 conn->bonding_flags = 0; 119 conn->requested_security_level = LEVEL_0; 120 linked_item_set_user(&conn->timeout.item, conn); 121 conn->timeout.process = hci_connection_timeout_handler; 122 hci_connection_timestamp(conn); 123 conn->acl_recombination_length = 0; 124 conn->acl_recombination_pos = 0; 125 conn->num_acl_packets_sent = 0; 126 conn->num_sco_packets_sent = 0; 127 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 128 linked_list_add(&hci_stack->connections, (linked_item_t *) conn); 129 return conn; 130 } 131 132 133 /** 134 * get le connection parameter range 135 * 136 * @return le connection parameter range struct 137 */ 138 void gap_le_get_connection_parameter_range(le_connection_parameter_range_t range){ 139 range = hci_stack->le_connection_parameter_range; 140 } 141 142 /** 143 * set le connection parameter range 144 * 145 */ 146 147 void gap_le_set_connection_parameter_range(le_connection_parameter_range_t range){ 148 hci_stack->le_connection_parameter_range = range; 149 } 150 151 /** 152 * get hci connections iterator 153 * 154 * @return hci connections iterator 155 */ 156 157 void hci_connections_get_iterator(linked_list_iterator_t *it){ 158 linked_list_iterator_init(it, &hci_stack->connections); 159 } 160 161 /** 162 * get connection for a given handle 163 * 164 * @return connection OR NULL, if not found 165 */ 166 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 167 linked_list_iterator_t it; 168 linked_list_iterator_init(&it, &hci_stack->connections); 169 while (linked_list_iterator_has_next(&it)){ 170 hci_connection_t * item = (hci_connection_t *) linked_list_iterator_next(&it); 171 if ( item->con_handle == con_handle ) { 172 return item; 173 } 174 } 175 return NULL; 176 } 177 178 /** 179 * get connection for given address 180 * 181 * @return connection OR NULL, if not found 182 */ 183 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 184 linked_list_iterator_t it; 185 linked_list_iterator_init(&it, &hci_stack->connections); 186 while (linked_list_iterator_has_next(&it)){ 187 hci_connection_t * connection = (hci_connection_t *) linked_list_iterator_next(&it); 188 if (connection->address_type != addr_type) continue; 189 if (memcmp(addr, connection->address, 6) != 0) continue; 190 return connection; 191 } 192 return NULL; 193 } 194 195 static void hci_connection_timeout_handler(timer_source_t *timer){ 196 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 197 #ifdef HAVE_TIME 198 struct timeval tv; 199 gettimeofday(&tv, NULL); 200 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 201 // connections might be timed out 202 hci_emit_l2cap_check_timeout(connection); 203 } 204 #endif 205 #ifdef HAVE_TICK 206 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 207 // connections might be timed out 208 hci_emit_l2cap_check_timeout(connection); 209 } 210 #endif 211 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 212 run_loop_add_timer(timer); 213 } 214 215 static void hci_connection_timestamp(hci_connection_t *connection){ 216 #ifdef HAVE_TIME 217 gettimeofday(&connection->timestamp, NULL); 218 #endif 219 #ifdef HAVE_TICK 220 connection->timestamp = embedded_get_ticks(); 221 #endif 222 } 223 224 225 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 226 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 227 } 228 229 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 230 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 231 } 232 233 234 /** 235 * add authentication flags and reset timer 236 * @note: assumes classic connection 237 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 238 */ 239 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 240 bd_addr_t addr; 241 bt_flip_addr(addr, bd_addr); 242 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 243 if (conn) { 244 connectionSetAuthenticationFlags(conn, flags); 245 hci_connection_timestamp(conn); 246 } 247 } 248 249 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 250 hci_connection_t * conn = hci_connection_for_handle(handle); 251 if (!conn) return 0; 252 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 253 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 254 return 0; 255 } 256 257 void hci_drop_link_key_for_bd_addr(bd_addr_t addr){ 258 if (hci_stack->remote_device_db) { 259 hci_stack->remote_device_db->delete_link_key(addr); 260 } 261 } 262 263 int hci_is_le_connection(hci_connection_t * connection){ 264 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 265 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 266 } 267 268 269 /** 270 * count connections 271 */ 272 static int nr_hci_connections(void){ 273 int count = 0; 274 linked_item_t *it; 275 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 276 return count; 277 } 278 279 /** 280 * Dummy handler called by HCI 281 */ 282 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 283 } 284 285 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 286 hci_connection_t * connection = hci_connection_for_handle(handle); 287 if (!connection) { 288 log_error("hci_number_outgoing_packets: connection for handle %u does not exist!", handle); 289 return 0; 290 } 291 return connection->num_acl_packets_sent; 292 } 293 294 uint8_t hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 295 296 int num_packets_sent_classic = 0; 297 int num_packets_sent_le = 0; 298 299 bd_addr_type_t address_type = BD_ADDR_TYPE_UNKNOWN; 300 301 linked_item_t *it; 302 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 303 hci_connection_t * connection = (hci_connection_t *) it; 304 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 305 num_packets_sent_classic += connection->num_acl_packets_sent; 306 } else { 307 num_packets_sent_le += connection->num_acl_packets_sent; 308 } 309 // ignore connections that are not open, e.g., in state RECEIVED_DISCONNECTION_COMPLETE 310 if (connection->con_handle == con_handle && connection->state == OPEN){ 311 address_type = connection->address_type; 312 } 313 } 314 315 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 316 int free_slots_le = 0; 317 318 if (free_slots_classic < 0){ 319 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); 320 return 0; 321 } 322 323 if (hci_stack->le_acl_packets_total_num){ 324 // if we have LE slots, they are used 325 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 326 if (free_slots_le < 0){ 327 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); 328 return 0; 329 } 330 } else { 331 // otherwise, classic slots are used for LE, too 332 free_slots_classic -= num_packets_sent_le; 333 if (free_slots_classic < 0){ 334 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); 335 return 0; 336 } 337 } 338 339 switch (address_type){ 340 case BD_ADDR_TYPE_UNKNOWN: 341 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 342 return 0; 343 344 case BD_ADDR_TYPE_CLASSIC: 345 return free_slots_classic; 346 347 default: 348 if (hci_stack->le_acl_packets_total_num){ 349 return free_slots_le; 350 } 351 return free_slots_classic; 352 } 353 } 354 355 static int hci_number_free_sco_slots_for_handle(hci_con_handle_t handle){ 356 int num_sco_packets_sent = 0; 357 linked_item_t *it; 358 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 359 hci_connection_t * connection = (hci_connection_t *) it; 360 num_sco_packets_sent += connection->num_sco_packets_sent; 361 } 362 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 363 log_info("hci_number_free_sco_slots_for_handle: outgoing packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 364 return 0; 365 } 366 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 367 } 368 369 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 370 int hci_can_send_command_packet_now(void){ 371 if (hci_stack->hci_packet_buffer_reserved) return 0; 372 373 // check for async hci transport implementations 374 if (hci_stack->hci_transport->can_send_packet_now){ 375 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 376 return 0; 377 } 378 } 379 380 return hci_stack->num_cmd_packets > 0; 381 } 382 383 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 384 // check for async hci transport implementations 385 if (hci_stack->hci_transport->can_send_packet_now){ 386 if (!hci_stack->hci_transport->can_send_packet_now(HCI_ACL_DATA_PACKET)){ 387 return 0; 388 } 389 } 390 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 391 } 392 393 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 394 if (hci_stack->hci_packet_buffer_reserved) return 0; 395 return hci_can_send_prepared_acl_packet_now(con_handle); 396 } 397 398 int hci_can_send_prepared_sco_packet_now(hci_con_handle_t con_handle){ 399 if (hci_stack->hci_transport->can_send_packet_now){ 400 if (!hci_stack->hci_transport->can_send_packet_now(HCI_SCO_DATA_PACKET)){ 401 return 0; 402 } 403 } 404 if (!hci_stack->synchronous_flow_control_enabled) return 1; 405 return hci_number_free_sco_slots_for_handle(con_handle) > 0; 406 } 407 408 int hci_can_send_sco_packet_now(hci_con_handle_t con_handle){ 409 if (hci_stack->hci_packet_buffer_reserved) return 0; 410 return hci_can_send_prepared_sco_packet_now(con_handle); 411 } 412 413 // used for internal checks in l2cap[-le].c 414 int hci_is_packet_buffer_reserved(void){ 415 return hci_stack->hci_packet_buffer_reserved; 416 } 417 418 // reserves outgoing packet buffer. @returns 1 if successful 419 int hci_reserve_packet_buffer(void){ 420 if (hci_stack->hci_packet_buffer_reserved) { 421 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 422 return 0; 423 } 424 hci_stack->hci_packet_buffer_reserved = 1; 425 return 1; 426 } 427 428 void hci_release_packet_buffer(void){ 429 hci_stack->hci_packet_buffer_reserved = 0; 430 } 431 432 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 433 static int hci_transport_synchronous(void){ 434 return hci_stack->hci_transport->can_send_packet_now == NULL; 435 } 436 437 uint16_t hci_max_acl_le_data_packet_length(void){ 438 return hci_stack->le_data_packets_length > 0 ? hci_stack->le_data_packets_length : hci_stack->acl_data_packet_length; 439 } 440 441 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 442 443 // 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); 444 445 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 446 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 447 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 448 max_acl_data_packet_length = hci_stack->le_data_packets_length; 449 } 450 451 // testing: reduce buffer to minimum 452 // max_acl_data_packet_length = 52; 453 454 int err; 455 // multiple packets could be send on a synchronous HCI transport 456 while (1){ 457 458 // get current data 459 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 460 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 461 int more_fragments = 0; 462 463 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 464 if (current_acl_data_packet_length > max_acl_data_packet_length){ 465 more_fragments = 1; 466 current_acl_data_packet_length = max_acl_data_packet_length; 467 } 468 469 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 470 if (acl_header_pos > 0){ 471 uint16_t handle_and_flags = READ_BT_16(hci_stack->hci_packet_buffer, 0); 472 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 473 bt_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 474 } 475 476 // update header len 477 bt_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 478 479 // count packet 480 connection->num_acl_packets_sent++; 481 482 // send packet 483 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 484 const int size = current_acl_data_packet_length + 4; 485 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 486 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 487 488 // done yet? 489 if (!more_fragments) break; 490 491 // update start of next fragment to send 492 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 493 494 // can send more? 495 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 496 } 497 498 // done 499 hci_stack->acl_fragmentation_pos = 0; 500 hci_stack->acl_fragmentation_total_size = 0; 501 502 // release buffer now for synchronous transport 503 if (hci_transport_synchronous()){ 504 hci_release_packet_buffer(); 505 // notify upper stack that iit might be possible to send again 506 uint8_t event[] = { DAEMON_EVENT_HCI_PACKET_SENT, 0}; 507 hci_stack->packet_handler(HCI_EVENT_PACKET, &event[0], sizeof(event)); 508 } 509 510 return err; 511 } 512 513 // pre: caller has reserved the packet buffer 514 int hci_send_acl_packet_buffer(int size){ 515 516 // log_info("hci_send_acl_packet_buffer size %u", size); 517 518 if (!hci_stack->hci_packet_buffer_reserved) { 519 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 520 return 0; 521 } 522 523 uint8_t * packet = hci_stack->hci_packet_buffer; 524 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 525 526 // check for free places on Bluetooth module 527 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 528 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 529 hci_release_packet_buffer(); 530 return BTSTACK_ACL_BUFFERS_FULL; 531 } 532 533 hci_connection_t *connection = hci_connection_for_handle( con_handle); 534 if (!connection) { 535 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 536 hci_release_packet_buffer(); 537 return 0; 538 } 539 hci_connection_timestamp(connection); 540 541 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 542 543 // setup data 544 hci_stack->acl_fragmentation_total_size = size; 545 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 546 547 return hci_send_acl_packet_fragments(connection); 548 } 549 550 // pre: caller has reserved the packet buffer 551 int hci_send_sco_packet_buffer(int size){ 552 553 // log_info("hci_send_acl_packet_buffer size %u", size); 554 555 if (!hci_stack->hci_packet_buffer_reserved) { 556 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 557 return 0; 558 } 559 560 uint8_t * packet = hci_stack->hci_packet_buffer; 561 562 // skip checks in loopback mode 563 if (!hci_stack->loopback_mode){ 564 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 565 566 // check for free places on Bluetooth module 567 if (!hci_can_send_prepared_sco_packet_now(con_handle)) { 568 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 569 hci_release_packet_buffer(); 570 return BTSTACK_ACL_BUFFERS_FULL; 571 } 572 573 // track send packet in connection struct 574 hci_connection_t *connection = hci_connection_for_handle( con_handle); 575 if (!connection) { 576 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 577 hci_release_packet_buffer(); 578 return 0; 579 } 580 connection->num_sco_packets_sent++; 581 } 582 583 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 584 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 585 586 if (hci_transport_synchronous()){ 587 hci_release_packet_buffer(); 588 // notify upper stack that iit might be possible to send again 589 uint8_t event[] = { DAEMON_EVENT_HCI_PACKET_SENT, 0}; 590 hci_stack->packet_handler(HCI_EVENT_PACKET, &event[0], sizeof(event)); 591 } 592 593 return err; 594 } 595 596 static void acl_handler(uint8_t *packet, int size){ 597 598 // log_info("acl_handler: size %u", size); 599 600 // get info 601 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 602 hci_connection_t *conn = hci_connection_for_handle(con_handle); 603 uint8_t acl_flags = READ_ACL_FLAGS(packet); 604 uint16_t acl_length = READ_ACL_LENGTH(packet); 605 606 // ignore non-registered handle 607 if (!conn){ 608 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 609 return; 610 } 611 612 // assert packet is complete 613 if (acl_length + 4 != size){ 614 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 615 return; 616 } 617 618 // update idle timestamp 619 hci_connection_timestamp(conn); 620 621 // handle different packet types 622 switch (acl_flags & 0x03) { 623 624 case 0x01: // continuation fragment 625 626 // sanity checks 627 if (conn->acl_recombination_pos == 0) { 628 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 629 return; 630 } 631 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 632 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 633 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 634 conn->acl_recombination_pos = 0; 635 return; 636 } 637 638 // append fragment payload (header already stored) 639 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 640 conn->acl_recombination_pos += acl_length; 641 642 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 643 // conn->acl_recombination_pos, conn->acl_recombination_length); 644 645 // forward complete L2CAP packet if complete. 646 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 647 648 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, &conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 649 // reset recombination buffer 650 conn->acl_recombination_length = 0; 651 conn->acl_recombination_pos = 0; 652 } 653 break; 654 655 case 0x02: { // first fragment 656 657 // sanity check 658 if (conn->acl_recombination_pos) { 659 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 660 conn->acl_recombination_pos = 0; 661 } 662 663 // peek into L2CAP packet! 664 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 665 666 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 667 668 // compare fragment size to L2CAP packet size 669 if (acl_length >= l2cap_length + 4){ 670 671 // forward fragment as L2CAP packet 672 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 673 674 } else { 675 676 if (acl_length > HCI_ACL_BUFFER_SIZE){ 677 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 678 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 679 return; 680 } 681 682 // store first fragment and tweak acl length for complete package 683 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 684 conn->acl_recombination_pos = acl_length + 4; 685 conn->acl_recombination_length = l2cap_length; 686 bt_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 687 } 688 break; 689 690 } 691 default: 692 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 693 return; 694 } 695 696 // execute main loop 697 hci_run(); 698 } 699 700 static void hci_shutdown_connection(hci_connection_t *conn){ 701 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 702 703 run_loop_remove_timer(&conn->timeout); 704 705 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 706 btstack_memory_hci_connection_free( conn ); 707 708 // now it's gone 709 hci_emit_nr_connections_changed(); 710 } 711 712 static const uint16_t packet_type_sizes[] = { 713 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 714 HCI_ACL_DH1_SIZE, 0, 0, 0, 715 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 716 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 717 }; 718 static const uint8_t packet_type_feature_requirement_bit[] = { 719 0, // 3 slot packets 720 1, // 5 slot packets 721 25, // EDR 2 mpbs 722 26, // EDR 3 mbps 723 39, // 3 slot EDR packts 724 40, // 5 slot EDR packet 725 }; 726 static const uint16_t packet_type_feature_packet_mask[] = { 727 0x0f00, // 3 slot packets 728 0xf000, // 5 slot packets 729 0x1102, // EDR 2 mpbs 730 0x2204, // EDR 3 mbps 731 0x0300, // 3 slot EDR packts 732 0x3000, // 5 slot EDR packet 733 }; 734 735 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 736 // enable packet types based on size 737 uint16_t packet_types = 0; 738 unsigned int i; 739 for (i=0;i<16;i++){ 740 if (packet_type_sizes[i] == 0) continue; 741 if (packet_type_sizes[i] <= buffer_size){ 742 packet_types |= 1 << i; 743 } 744 } 745 // disable packet types due to missing local supported features 746 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 747 int bit_idx = packet_type_feature_requirement_bit[i]; 748 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 749 if (feature_set) continue; 750 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 751 packet_types &= ~packet_type_feature_packet_mask[i]; 752 } 753 // flip bits for "may not be used" 754 packet_types ^= 0x3306; 755 return packet_types; 756 } 757 758 uint16_t hci_usable_acl_packet_types(void){ 759 return hci_stack->packet_types; 760 } 761 762 uint8_t* hci_get_outgoing_packet_buffer(void){ 763 // hci packet buffer is >= acl data packet length 764 return hci_stack->hci_packet_buffer; 765 } 766 767 uint16_t hci_max_acl_data_packet_length(void){ 768 return hci_stack->acl_data_packet_length; 769 } 770 771 int hci_non_flushable_packet_boundary_flag_supported(void){ 772 // No. 54, byte 6, bit 6 773 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 774 } 775 776 static int hci_ssp_supported(void){ 777 // No. 51, byte 6, bit 3 778 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 779 } 780 781 static int hci_classic_supported(void){ 782 // No. 37, byte 4, bit 5, = No BR/EDR Support 783 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 784 } 785 786 static int hci_le_supported(void){ 787 #ifdef HAVE_BLE 788 // No. 37, byte 4, bit 6 = LE Supported (Controller) 789 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 790 #else 791 return 0; 792 #endif 793 } 794 795 // get addr type and address used in advertisement packets 796 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t addr){ 797 *addr_type = hci_stack->adv_addr_type; 798 if (hci_stack->adv_addr_type){ 799 memcpy(addr, hci_stack->adv_address, 6); 800 } else { 801 memcpy(addr, hci_stack->local_bd_addr, 6); 802 } 803 } 804 805 #ifdef HAVE_BLE 806 void le_handle_advertisement_report(uint8_t *packet, int size){ 807 int offset = 3; 808 int num_reports = packet[offset]; 809 offset += 1; 810 811 int i; 812 log_info("HCI: handle adv report with num reports: %d", num_reports); 813 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 814 for (i=0; i<num_reports;i++){ 815 uint8_t data_length = packet[offset + 8]; 816 uint8_t event_size = 10 + data_length; 817 int pos = 0; 818 event[pos++] = GAP_LE_ADVERTISING_REPORT; 819 event[pos++] = event_size; 820 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 821 offset += 8; 822 pos += 8; 823 event[pos++] = packet[offset + 1 + data_length]; // rssi 824 event[pos++] = packet[offset++]; //data_length; 825 memcpy(&event[pos], &packet[offset], data_length); 826 pos += data_length; 827 offset += data_length + 1; // rssi 828 hci_dump_packet( HCI_EVENT_PACKET, 0, event, pos); 829 hci_stack->packet_handler(HCI_EVENT_PACKET, event, pos); 830 } 831 } 832 #endif 833 834 static void hci_initialization_timeout_handler(timer_source_t * ds){ 835 switch (hci_stack->substate){ 836 case HCI_INIT_W4_SEND_RESET: 837 log_info("Resend HCI Reset"); 838 hci_stack->substate = HCI_INIT_SEND_RESET; 839 hci_stack->num_cmd_packets = 1; 840 hci_run(); 841 break; 842 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 843 log_info("Resend HCI Reset - CSR Warm Boot"); 844 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 845 hci_stack->num_cmd_packets = 1; 846 hci_run(); 847 break; 848 case HCI_INIT_W4_SEND_BAUD_CHANGE: 849 log_info("Local baud rate change to %"PRIu32, ((hci_uart_config_t *)hci_stack->config)->baudrate_main); 850 hci_stack->hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack->config)->baudrate_main); 851 // For CSR, HCI Reset is sent on new baud rate 852 if (hci_stack->manufacturer == 0x000a){ 853 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 854 hci_run(); 855 } 856 break; 857 default: 858 break; 859 } 860 } 861 862 static void hci_initializing_next_state(void){ 863 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 864 } 865 866 // assumption: hci_can_send_command_packet_now() == true 867 static void hci_initializing_run(void){ 868 log_info("hci_initializing_run: substate %u", hci_stack->substate); 869 switch (hci_stack->substate){ 870 case HCI_INIT_SEND_RESET: 871 hci_state_reset(); 872 873 #ifndef USE_BLUETOOL 874 // prepare reset if command complete not received in 100ms 875 run_loop_set_timer(&hci_stack->timeout, 100); 876 run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 877 run_loop_add_timer(&hci_stack->timeout); 878 #endif 879 // send command 880 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 881 hci_send_cmd(&hci_reset); 882 break; 883 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 884 hci_send_cmd(&hci_read_local_version_information); 885 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 886 break; 887 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 888 hci_state_reset(); 889 // prepare reset if command complete not received in 100ms 890 run_loop_set_timer(&hci_stack->timeout, 100); 891 run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 892 run_loop_add_timer(&hci_stack->timeout); 893 // send command 894 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 895 hci_send_cmd(&hci_reset); 896 break; 897 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 898 hci_state_reset(); 899 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 900 hci_send_cmd(&hci_reset); 901 break; 902 case HCI_INIT_SET_BD_ADDR: 903 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 904 hci_stack->control->set_bd_addr_cmd(hci_stack->config, hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 905 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 906 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 907 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 908 break; 909 case HCI_INIT_SEND_BAUD_CHANGE: 910 hci_stack->control->baudrate_cmd(hci_stack->config, ((hci_uart_config_t *)hci_stack->config)->baudrate_main, hci_stack->hci_packet_buffer); 911 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 912 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 913 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 914 // STLC25000D: baudrate change happens within 0.5 s after command was send, 915 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 916 if (hci_stack->manufacturer == 0x0030){ 917 run_loop_set_timer(&hci_stack->timeout, 100); 918 run_loop_add_timer(&hci_stack->timeout); 919 } 920 break; 921 case HCI_INIT_CUSTOM_INIT: 922 log_info("Custom init"); 923 // Custom initialization 924 if (hci_stack->control && hci_stack->control->next_cmd){ 925 int valid_cmd = (*hci_stack->control->next_cmd)(hci_stack->config, hci_stack->hci_packet_buffer); 926 if (valid_cmd){ 927 int size = 3 + hci_stack->hci_packet_buffer[2]; 928 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 929 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 930 switch (valid_cmd) { 931 case 1: 932 default: 933 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 934 break; 935 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 936 log_info("CSR Warm Boot"); 937 run_loop_set_timer(&hci_stack->timeout, 100); 938 run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 939 run_loop_add_timer(&hci_stack->timeout); 940 if (hci_stack->manufacturer == 0x000a 941 && hci_stack->config 942 && hci_stack->control 943 // && hci_stack->control->baudrate_cmd -- there's no such command 944 && hci_stack->hci_transport->set_baudrate 945 && ((hci_uart_config_t *)hci_stack->config)->baudrate_main){ 946 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 947 } else { 948 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 949 } 950 break; 951 } 952 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 953 break; 954 } 955 log_info("hci_run: init script done"); 956 } 957 // otherwise continue 958 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 959 hci_send_cmd(&hci_read_bd_addr); 960 break; 961 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 962 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 963 hci_send_cmd(&hci_read_local_supported_commands); 964 break; 965 case HCI_INIT_READ_BUFFER_SIZE: 966 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 967 hci_send_cmd(&hci_read_buffer_size); 968 break; 969 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATUES: 970 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATUES; 971 hci_send_cmd(&hci_read_local_supported_features); 972 break; 973 case HCI_INIT_SET_EVENT_MASK: 974 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 975 if (hci_le_supported()){ 976 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 977 } else { 978 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 979 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 980 } 981 break; 982 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 983 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 984 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 985 break; 986 case HCI_INIT_WRITE_PAGE_TIMEOUT: 987 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 988 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 989 break; 990 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 991 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 992 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 993 break; 994 case HCI_INIT_WRITE_LOCAL_NAME: 995 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 996 if (hci_stack->local_name){ 997 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 998 } else { 999 char hostname[30]; 1000 #ifdef EMBEDDED 1001 // BTstack-11:22:33:44:55:66 1002 strcpy(hostname, "BTstack "); 1003 strcat(hostname, bd_addr_to_str(hci_stack->local_bd_addr)); 1004 log_info("---> Name %s", hostname); 1005 #else 1006 // hostname for POSIX systems 1007 gethostname(hostname, 30); 1008 hostname[29] = '\0'; 1009 #endif 1010 hci_send_cmd(&hci_write_local_name, hostname); 1011 } 1012 break; 1013 case HCI_INIT_WRITE_SCAN_ENABLE: 1014 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1015 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1016 break; 1017 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1018 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1019 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1020 break; 1021 #ifdef HAVE_BLE 1022 // LE INIT 1023 case HCI_INIT_LE_READ_BUFFER_SIZE: 1024 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1025 hci_send_cmd(&hci_le_read_buffer_size); 1026 break; 1027 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1028 // LE Supported Host = 1, Simultaneous Host = 0 1029 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1030 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1031 break; 1032 case HCI_INIT_READ_WHITE_LIST_SIZE: 1033 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1034 hci_send_cmd(&hci_le_read_white_list_size); 1035 break; 1036 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1037 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1038 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1039 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1040 break; 1041 #endif 1042 default: 1043 return; 1044 } 1045 } 1046 1047 static void hci_init_done(void){ 1048 // done. tell the app 1049 log_info("hci_init_done -> HCI_STATE_WORKING"); 1050 hci_stack->state = HCI_STATE_WORKING; 1051 hci_emit_state(); 1052 hci_run(); 1053 } 1054 1055 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1056 uint8_t command_completed = 0; 1057 1058 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 1059 uint16_t opcode = READ_BT_16(packet,3); 1060 if (opcode == hci_stack->last_cmd_opcode){ 1061 command_completed = 1; 1062 log_info("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1063 } else { 1064 log_info("Command complete for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1065 } 1066 } 1067 1068 if (packet[0] == HCI_EVENT_COMMAND_STATUS){ 1069 uint8_t status = packet[2]; 1070 uint16_t opcode = READ_BT_16(packet,4); 1071 if (opcode == hci_stack->last_cmd_opcode){ 1072 if (status){ 1073 command_completed = 1; 1074 log_error("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1075 } else { 1076 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1077 } 1078 } else { 1079 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1080 } 1081 } 1082 1083 // Vendor == CSR 1084 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && packet[0] == HCI_EVENT_VENDOR_SPECIFIC){ 1085 // TODO: track actual command 1086 command_completed = 1; 1087 } 1088 1089 // Vendor == Toshiba 1090 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && packet[0] == HCI_EVENT_VENDOR_SPECIFIC){ 1091 // TODO: track actual command 1092 command_completed = 1; 1093 } 1094 1095 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1096 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1097 // 1098 // HCI Reset 1099 // Timeout 100 ms 1100 // HCI Reset 1101 // Command Complete Reset 1102 // HCI Read Local Version Information 1103 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1104 // hang... 1105 // 1106 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1107 if (!command_completed 1108 && packet[0] == HCI_EVENT_COMMAND_COMPLETE 1109 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1110 1111 uint16_t opcode = READ_BT_16(packet,3); 1112 if (opcode == hci_reset.opcode){ 1113 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1114 return; 1115 } 1116 } 1117 1118 1119 1120 if (!command_completed) return; 1121 1122 int need_baud_change = hci_stack->config 1123 && hci_stack->control 1124 && hci_stack->control->baudrate_cmd 1125 && hci_stack->hci_transport->set_baudrate 1126 && ((hci_uart_config_t *)hci_stack->config)->baudrate_main; 1127 1128 int need_addr_change = hci_stack->custom_bd_addr_set 1129 && hci_stack->control 1130 && hci_stack->control->set_bd_addr_cmd; 1131 1132 switch(hci_stack->substate){ 1133 case HCI_INIT_W4_SEND_RESET: 1134 run_loop_remove_timer(&hci_stack->timeout); 1135 break; 1136 case HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION: 1137 if (need_addr_change){ 1138 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1139 return; 1140 } 1141 // skipping addr change 1142 if (need_baud_change){ 1143 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1144 return; 1145 } 1146 // also skip baud change 1147 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1148 return; 1149 case HCI_INIT_W4_SET_BD_ADDR: 1150 // for STLC2500D, bd addr change only gets active after sending reset command 1151 if (hci_stack->manufacturer == 0x0030){ 1152 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1153 return; 1154 } 1155 // skipping warm boot on STLC2500D 1156 if (need_baud_change){ 1157 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1158 return; 1159 } 1160 // skipping baud change 1161 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1162 return; 1163 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1164 if (need_baud_change){ 1165 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1166 return; 1167 } 1168 // skipping baud change 1169 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1170 return; 1171 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1172 // for STLC2500D, baud rate change already happened. 1173 // for CC256x, baud rate gets changed now 1174 if (hci_stack->manufacturer != 0x0030){ 1175 uint32_t new_baud = ((hci_uart_config_t *)hci_stack->config)->baudrate_main; 1176 log_info("Local baud rate change to %"PRIu32, new_baud); 1177 hci_stack->hci_transport->set_baudrate(new_baud); 1178 } 1179 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1180 return; 1181 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1182 run_loop_remove_timer(&hci_stack->timeout); 1183 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1184 return; 1185 case HCI_INIT_W4_CUSTOM_INIT: 1186 // repeat custom init 1187 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1188 return; 1189 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1190 // skip read buffer size if not supported 1191 if (hci_stack->local_supported_commands[0] & 0x01) break; 1192 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATUES; 1193 return; 1194 case HCI_INIT_W4_SET_EVENT_MASK: 1195 // skip Classic init commands for LE only chipsets 1196 if (!hci_classic_supported()){ 1197 if (hci_le_supported()){ 1198 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1199 return; 1200 } else { 1201 log_error("Neither BR/EDR nor LE supported"); 1202 hci_init_done(); 1203 return; 1204 } 1205 } 1206 if (!hci_ssp_supported()){ 1207 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1208 return; 1209 } 1210 break; 1211 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 1212 break; 1213 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1214 // skip write le host if not supported (e.g. on LE only EM9301) 1215 if (hci_stack->local_supported_commands[0] & 0x02) break; 1216 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1217 return; 1218 1219 #ifdef HAVE_SCO_OVER_HCI 1220 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1221 // just go to next state 1222 break; 1223 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1224 if (!hci_le_supported()){ 1225 // SKIP LE init for Classic only configuration 1226 hci_init_done(); 1227 return; 1228 } 1229 break; 1230 #else 1231 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1232 if (!hci_le_supported()){ 1233 // SKIP LE init for Classic only configuration 1234 hci_init_done(); 1235 return; 1236 } 1237 #endif 1238 break; 1239 // Response to command before init done state -> init done 1240 case (HCI_INIT_DONE-1): 1241 hci_init_done(); 1242 return; 1243 1244 default: 1245 break; 1246 } 1247 hci_initializing_next_state(); 1248 } 1249 1250 1251 // avoid huge local variables 1252 #ifndef EMBEDDED 1253 static device_name_t device_name; 1254 #endif 1255 static void event_handler(uint8_t *packet, int size){ 1256 1257 uint16_t event_length = packet[1]; 1258 1259 // assert packet is complete 1260 if (size != event_length + 2){ 1261 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 1262 return; 1263 } 1264 1265 bd_addr_t addr; 1266 bd_addr_type_t addr_type; 1267 uint8_t link_type; 1268 hci_con_handle_t handle; 1269 hci_connection_t * conn; 1270 int i; 1271 1272 // log_info("HCI:EVENT:%02x", packet[0]); 1273 1274 switch (packet[0]) { 1275 1276 case HCI_EVENT_COMMAND_COMPLETE: 1277 // get num cmd packets 1278 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1279 hci_stack->num_cmd_packets = packet[2]; 1280 1281 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 1282 // from offset 5 1283 // status 1284 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1285 hci_stack->acl_data_packet_length = READ_BT_16(packet, 6); 1286 hci_stack->sco_data_packet_length = packet[8]; 1287 hci_stack->acl_packets_total_num = READ_BT_16(packet, 9); 1288 hci_stack->sco_packets_total_num = READ_BT_16(packet, 11); 1289 1290 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1291 // determine usable ACL payload size 1292 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1293 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1294 } 1295 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1296 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1297 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1298 } 1299 } 1300 #ifdef HAVE_BLE 1301 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 1302 hci_stack->le_data_packets_length = READ_BT_16(packet, 6); 1303 hci_stack->le_acl_packets_total_num = packet[8]; 1304 // determine usable ACL payload size 1305 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1306 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1307 } 1308 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1309 } 1310 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_white_list_size)){ 1311 hci_stack->le_whitelist_capacity = READ_BT_16(packet, 6); 1312 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1313 } 1314 #endif 1315 // Dump local address 1316 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 1317 bt_flip_addr(hci_stack->local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 1318 log_info("Local Address, Status: 0x%02x: Addr: %s", 1319 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1320 } 1321 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1322 hci_emit_discoverable_enabled(hci_stack->discoverable); 1323 } 1324 // Note: HCI init checks 1325 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 1326 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1327 1328 // determine usable ACL packet types based on host buffer size and supported features 1329 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1330 log_info("packet types %04x", hci_stack->packet_types); 1331 1332 // Classic/LE 1333 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1334 } 1335 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_version_information)){ 1336 // hci_stack->hci_version = READ_BT_16(packet, 4); 1337 // hci_stack->hci_revision = READ_BT_16(packet, 6); 1338 // hci_stack->lmp_version = READ_BT_16(packet, 8); 1339 hci_stack->manufacturer = READ_BT_16(packet, 10); 1340 // hci_stack->lmp_subversion = READ_BT_16(packet, 12); 1341 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1342 } 1343 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_commands)){ 1344 hci_stack->local_supported_commands[0] = 1345 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0X80) >> 7 | // Octet 14, bit 7 1346 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5; // Octet 24, bit 6 1347 } 1348 if (COMMAND_COMPLETE_EVENT(packet, hci_write_synchronous_flow_control_enable)){ 1349 if (packet[5] == 0){ 1350 hci_stack->synchronous_flow_control_enabled = 1; 1351 } 1352 } 1353 break; 1354 1355 case HCI_EVENT_COMMAND_STATUS: 1356 // get num cmd packets 1357 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1358 hci_stack->num_cmd_packets = packet[3]; 1359 break; 1360 1361 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1362 int offset = 3; 1363 for (i=0; i<packet[2];i++){ 1364 handle = READ_BT_16(packet, offset); 1365 offset += 2; 1366 uint16_t num_packets = READ_BT_16(packet, offset); 1367 offset += 2; 1368 1369 conn = hci_connection_for_handle(handle); 1370 if (!conn){ 1371 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1372 continue; 1373 } 1374 1375 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1376 if (conn->num_sco_packets_sent >= num_packets){ 1377 conn->num_sco_packets_sent -= num_packets; 1378 } else { 1379 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1380 conn->num_sco_packets_sent = 0; 1381 } 1382 1383 } else { 1384 if (conn->num_acl_packets_sent >= num_packets){ 1385 conn->num_acl_packets_sent -= num_packets; 1386 } else { 1387 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1388 conn->num_acl_packets_sent = 0; 1389 } 1390 } 1391 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1392 } 1393 break; 1394 } 1395 case HCI_EVENT_CONNECTION_REQUEST: 1396 bt_flip_addr(addr, &packet[2]); 1397 // TODO: eval COD 8-10 1398 link_type = packet[11]; 1399 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1400 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1401 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1402 if (!conn) { 1403 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1404 } 1405 if (!conn) { 1406 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1407 hci_stack->decline_reason = 0x0d; 1408 BD_ADDR_COPY(hci_stack->decline_addr, addr); 1409 break; 1410 } 1411 conn->role = HCI_ROLE_SLAVE; 1412 conn->state = RECEIVED_CONNECTION_REQUEST; 1413 // store info about eSCO 1414 if (link_type == 0x02){ 1415 conn->remote_supported_feature_eSCO = 1; 1416 } 1417 hci_run(); 1418 break; 1419 1420 case HCI_EVENT_CONNECTION_COMPLETE: 1421 // Connection management 1422 bt_flip_addr(addr, &packet[5]); 1423 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1424 addr_type = BD_ADDR_TYPE_CLASSIC; 1425 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1426 if (conn) { 1427 if (!packet[2]){ 1428 conn->state = OPEN; 1429 conn->con_handle = READ_BT_16(packet, 3); 1430 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1431 1432 // restart timer 1433 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1434 run_loop_add_timer(&conn->timeout); 1435 1436 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1437 1438 hci_emit_nr_connections_changed(); 1439 } else { 1440 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1441 uint8_t status = packet[2]; 1442 bd_addr_t bd_address; 1443 memcpy(&bd_address, conn->address, 6); 1444 1445 // connection failed, remove entry 1446 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1447 btstack_memory_hci_connection_free( conn ); 1448 1449 // notify client if dedicated bonding 1450 if (notify_dedicated_bonding_failed){ 1451 log_info("hci notify_dedicated_bonding_failed"); 1452 hci_emit_dedicated_bonding_result(bd_address, status); 1453 } 1454 1455 // if authentication error, also delete link key 1456 if (packet[2] == 0x05) { 1457 hci_drop_link_key_for_bd_addr(addr); 1458 } 1459 } 1460 } 1461 break; 1462 1463 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1464 bt_flip_addr(addr, &packet[5]); 1465 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1466 if (packet[2]){ 1467 // connection failed 1468 break; 1469 } 1470 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1471 if (!conn) { 1472 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1473 } 1474 if (!conn) { 1475 break; 1476 } 1477 conn->state = OPEN; 1478 conn->con_handle = READ_BT_16(packet, 3); 1479 break; 1480 1481 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1482 handle = READ_BT_16(packet, 3); 1483 conn = hci_connection_for_handle(handle); 1484 if (!conn) break; 1485 if (!packet[2]){ 1486 uint8_t * features = &packet[5]; 1487 if (features[6] & (1 << 3)){ 1488 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1489 } 1490 if (features[3] & (1<<7)){ 1491 conn->remote_supported_feature_eSCO = 1; 1492 } 1493 } 1494 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1495 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1496 if (conn->bonding_flags & BONDING_DEDICATED){ 1497 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1498 } 1499 break; 1500 1501 case HCI_EVENT_LINK_KEY_REQUEST: 1502 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1503 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1504 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1505 if (hci_stack->bondable && !hci_stack->remote_device_db) break; 1506 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1507 hci_run(); 1508 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1509 return; 1510 1511 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1512 bt_flip_addr(addr, &packet[2]); 1513 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1514 if (!conn) break; 1515 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1516 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1517 // Change Connection Encryption keeps link key type 1518 if (link_key_type != CHANGED_COMBINATION_KEY){ 1519 conn->link_key_type = link_key_type; 1520 } 1521 if (!hci_stack->remote_device_db) break; 1522 hci_stack->remote_device_db->put_link_key(addr, &packet[8], conn->link_key_type); 1523 // still forward event to allow dismiss of pairing dialog 1524 break; 1525 } 1526 1527 case HCI_EVENT_PIN_CODE_REQUEST: 1528 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1529 // non-bondable mode: pin code negative reply will be sent 1530 if (!hci_stack->bondable){ 1531 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1532 hci_run(); 1533 return; 1534 } 1535 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1536 if (!hci_stack->remote_device_db) break; 1537 bt_flip_addr(addr, &packet[2]); 1538 hci_stack->remote_device_db->delete_link_key(addr); 1539 break; 1540 1541 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1542 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1543 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1544 break; 1545 1546 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1547 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1548 if (!hci_stack->ssp_auto_accept) break; 1549 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1550 break; 1551 1552 case HCI_EVENT_USER_PASSKEY_REQUEST: 1553 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1554 if (!hci_stack->ssp_auto_accept) break; 1555 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1556 break; 1557 1558 case HCI_EVENT_ENCRYPTION_CHANGE: 1559 handle = READ_BT_16(packet, 3); 1560 conn = hci_connection_for_handle(handle); 1561 if (!conn) break; 1562 if (packet[2] == 0) { 1563 if (packet[5]){ 1564 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1565 } else { 1566 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1567 } 1568 } 1569 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1570 break; 1571 1572 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1573 handle = READ_BT_16(packet, 3); 1574 conn = hci_connection_for_handle(handle); 1575 if (!conn) break; 1576 1577 // dedicated bonding: send result and disconnect 1578 if (conn->bonding_flags & BONDING_DEDICATED){ 1579 conn->bonding_flags &= ~BONDING_DEDICATED; 1580 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1581 conn->bonding_status = packet[2]; 1582 break; 1583 } 1584 1585 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1586 // link key sufficient for requested security 1587 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1588 break; 1589 } 1590 // not enough 1591 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1592 break; 1593 1594 #ifndef EMBEDDED 1595 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1596 if (!hci_stack->remote_device_db) break; 1597 if (packet[2]) break; // status not ok 1598 bt_flip_addr(addr, &packet[3]); 1599 // fix for invalid remote names - terminate on 0xff 1600 for (i=0; i<248;i++){ 1601 if (packet[9+i] == 0xff){ 1602 packet[9+i] = 0; 1603 break; 1604 } 1605 } 1606 memset(&device_name, 0, sizeof(device_name_t)); 1607 strncpy((char*) device_name, (char*) &packet[9], 248); 1608 hci_stack->remote_device_db->put_name(addr, &device_name); 1609 break; 1610 1611 case HCI_EVENT_INQUIRY_RESULT: 1612 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI:{ 1613 if (!hci_stack->remote_device_db) break; 1614 // first send inq result packet 1615 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1616 // then send cached remote names 1617 int offset = 3; 1618 for (i=0; i<packet[2];i++){ 1619 bt_flip_addr(addr, &packet[offset]); 1620 offset += 14; // 6 + 1 + 1 + 1 + 3 + 2; 1621 if (hci_stack->remote_device_db->get_name(addr, &device_name)){ 1622 hci_emit_remote_name_cached(addr, &device_name); 1623 } 1624 } 1625 return; 1626 } 1627 #endif 1628 1629 // HCI_EVENT_DISCONNECTION_COMPLETE 1630 // has been split, to first notify stack before shutting connection down 1631 // see end of function, too. 1632 case HCI_EVENT_DISCONNECTION_COMPLETE: 1633 if (packet[2]) break; // status != 0 1634 handle = READ_BT_16(packet, 3); 1635 conn = hci_connection_for_handle(handle); 1636 if (!conn) break; // no conn struct anymore 1637 // re-enable advertisements for le connections if active 1638 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1639 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1640 } 1641 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1642 break; 1643 1644 case HCI_EVENT_HARDWARE_ERROR: 1645 if (hci_stack->hardware_error_callback){ 1646 (*hci_stack->hardware_error_callback)(); 1647 } else if(hci_stack->control && hci_stack->control->hw_error){ 1648 (*hci_stack->control->hw_error)(); 1649 } else { 1650 // if no special requests, just reboot stack 1651 hci_power_control_off(); 1652 hci_power_control_on(); 1653 } 1654 break; 1655 1656 case HCI_EVENT_ROLE_CHANGE: 1657 if (packet[2]) break; // status != 0 1658 handle = READ_BT_16(packet, 3); 1659 conn = hci_connection_for_handle(handle); 1660 if (!conn) break; // no conn 1661 conn->role = packet[9]; 1662 break; 1663 1664 case DAEMON_EVENT_HCI_PACKET_SENT: 1665 // release packet buffer only for asynchronous transport and if there are not further fragements 1666 if (hci_transport_synchronous()) { 1667 log_error("Synchronous HCI Transport shouldn't send DAEMON_EVENT_HCI_PACKET_SENT"); 1668 return; // instead of break: to avoid re-entering hci_run() 1669 } 1670 if (hci_stack->acl_fragmentation_total_size) break; 1671 hci_release_packet_buffer(); 1672 break; 1673 1674 #ifdef HAVE_BLE 1675 case HCI_EVENT_LE_META: 1676 switch (packet[2]){ 1677 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1678 log_info("advertising report received"); 1679 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1680 le_handle_advertisement_report(packet, size); 1681 break; 1682 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1683 // Connection management 1684 bt_flip_addr(addr, &packet[8]); 1685 addr_type = (bd_addr_type_t)packet[7]; 1686 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1687 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1688 // if auto-connect, remove from whitelist in both roles 1689 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1690 hci_remove_from_whitelist(addr_type, addr); 1691 } 1692 // handle error: error is reported only to the initiator -> outgoing connection 1693 if (packet[3]){ 1694 // outgoing connection establishment is done 1695 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1696 // remove entry 1697 if (conn){ 1698 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1699 btstack_memory_hci_connection_free( conn ); 1700 } 1701 break; 1702 } 1703 // on success, both hosts receive connection complete event 1704 if (packet[6] == HCI_ROLE_MASTER){ 1705 // if we're master, it was an outgoing connection and we're done with it 1706 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1707 } else { 1708 // if we're slave, it was an incoming connection, advertisements have stopped 1709 hci_stack->le_advertisements_active = 0; 1710 } 1711 // LE connections are auto-accepted, so just create a connection if there isn't one already 1712 if (!conn){ 1713 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1714 } 1715 // no memory, sorry. 1716 if (!conn){ 1717 break; 1718 } 1719 1720 conn->state = OPEN; 1721 conn->role = packet[6]; 1722 conn->con_handle = READ_BT_16(packet, 4); 1723 1724 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1725 1726 // restart timer 1727 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1728 // run_loop_add_timer(&conn->timeout); 1729 1730 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1731 1732 hci_emit_nr_connections_changed(); 1733 break; 1734 1735 // log_info("LE buffer size: %u, count %u", READ_BT_16(packet,6), packet[8]); 1736 1737 default: 1738 break; 1739 } 1740 break; 1741 #endif 1742 default: 1743 break; 1744 } 1745 1746 // handle BT initialization 1747 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1748 hci_initializing_event_handler(packet, size); 1749 } 1750 1751 // help with BT sleep 1752 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1753 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1754 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1755 hci_initializing_next_state(); 1756 } 1757 1758 // notify upper stack 1759 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1760 1761 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1762 if (packet[0] == HCI_EVENT_DISCONNECTION_COMPLETE){ 1763 if (!packet[2]){ 1764 handle = READ_BT_16(packet, 3); 1765 hci_connection_t * aConn = hci_connection_for_handle(handle); 1766 if (aConn) { 1767 uint8_t status = aConn->bonding_status; 1768 uint16_t flags = aConn->bonding_flags; 1769 bd_addr_t bd_address; 1770 memcpy(&bd_address, aConn->address, 6); 1771 hci_shutdown_connection(aConn); 1772 // connection struct is gone, don't access anymore 1773 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1774 hci_emit_dedicated_bonding_result(bd_address, status); 1775 } 1776 } 1777 } 1778 } 1779 1780 // execute main loop 1781 hci_run(); 1782 } 1783 1784 static void sco_handler(uint8_t * packet, uint16_t size){ 1785 if (!hci_stack->sco_packet_handler) return; 1786 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, packet, size); 1787 } 1788 1789 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1790 hci_dump_packet(packet_type, 1, packet, size); 1791 switch (packet_type) { 1792 case HCI_EVENT_PACKET: 1793 event_handler(packet, size); 1794 break; 1795 case HCI_ACL_DATA_PACKET: 1796 acl_handler(packet, size); 1797 break; 1798 case HCI_SCO_DATA_PACKET: 1799 sco_handler(packet, size); 1800 default: 1801 break; 1802 } 1803 } 1804 1805 /** Register HCI packet handlers */ 1806 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1807 hci_stack->packet_handler = handler; 1808 } 1809 1810 /** 1811 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 1812 */ 1813 void hci_register_sco_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1814 hci_stack->sco_packet_handler = handler; 1815 } 1816 1817 static void hci_state_reset(void){ 1818 // no connections yet 1819 hci_stack->connections = NULL; 1820 1821 // keep discoverable/connectable as this has been requested by the client(s) 1822 // hci_stack->discoverable = 0; 1823 // hci_stack->connectable = 0; 1824 // hci_stack->bondable = 1; 1825 1826 // buffer is free 1827 hci_stack->hci_packet_buffer_reserved = 0; 1828 1829 // no pending cmds 1830 hci_stack->decline_reason = 0; 1831 hci_stack->new_scan_enable_value = 0xff; 1832 1833 // LE 1834 hci_stack->adv_addr_type = 0; 1835 memset(hci_stack->adv_address, 0, 6); 1836 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1837 hci_stack->le_scan_type = 0xff; 1838 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1839 hci_stack->le_whitelist = 0; 1840 hci_stack->le_whitelist_capacity = 0; 1841 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 1842 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 1843 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 1844 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 1845 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 1846 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 1847 } 1848 1849 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 1850 1851 #ifdef HAVE_MALLOC 1852 if (!hci_stack) { 1853 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1854 } 1855 #else 1856 hci_stack = &hci_stack_static; 1857 #endif 1858 memset(hci_stack, 0, sizeof(hci_stack_t)); 1859 1860 // reference to use transport layer implementation 1861 hci_stack->hci_transport = transport; 1862 1863 // references to used control implementation 1864 hci_stack->control = control; 1865 1866 // reference to used config 1867 hci_stack->config = config; 1868 1869 // higher level handler 1870 hci_stack->packet_handler = dummy_handler; 1871 1872 // store and open remote device db 1873 hci_stack->remote_device_db = remote_device_db; 1874 if (hci_stack->remote_device_db) { 1875 hci_stack->remote_device_db->open(); 1876 } 1877 1878 // max acl payload size defined in config.h 1879 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1880 1881 // register packet handlers with transport 1882 transport->register_packet_handler(&packet_handler); 1883 1884 hci_stack->state = HCI_STATE_OFF; 1885 1886 // class of device 1887 hci_stack->class_of_device = 0x007a020c; // Smartphone 1888 1889 // bondable by default 1890 hci_stack->bondable = 1; 1891 1892 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1893 hci_stack->ssp_enable = 1; 1894 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1895 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1896 hci_stack->ssp_auto_accept = 1; 1897 1898 // voice setting - signed 8 bit pcm data with CVSD over the air 1899 hci_stack->sco_voice_setting = 0x40; 1900 1901 hci_state_reset(); 1902 } 1903 1904 void hci_close(void){ 1905 // close remote device db 1906 if (hci_stack->remote_device_db) { 1907 hci_stack->remote_device_db->close(); 1908 } 1909 while (hci_stack->connections) { 1910 // cancel all l2cap connections 1911 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 1912 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1913 } 1914 hci_power_control(HCI_POWER_OFF); 1915 1916 #ifdef HAVE_MALLOC 1917 free(hci_stack); 1918 #endif 1919 hci_stack = NULL; 1920 } 1921 1922 void hci_set_class_of_device(uint32_t class_of_device){ 1923 hci_stack->class_of_device = class_of_device; 1924 } 1925 1926 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 1927 void hci_set_bd_addr(bd_addr_t addr){ 1928 memcpy(hci_stack->custom_bd_addr, addr, 6); 1929 hci_stack->custom_bd_addr_set = 1; 1930 } 1931 1932 void hci_disable_l2cap_timeout_check(void){ 1933 disable_l2cap_timeouts = 1; 1934 } 1935 // State-Module-Driver overview 1936 // state module low-level 1937 // HCI_STATE_OFF off close 1938 // HCI_STATE_INITIALIZING, on open 1939 // HCI_STATE_WORKING, on open 1940 // HCI_STATE_HALTING, on open 1941 // HCI_STATE_SLEEPING, off/sleep close 1942 // HCI_STATE_FALLING_ASLEEP on open 1943 1944 static int hci_power_control_on(void){ 1945 1946 // power on 1947 int err = 0; 1948 if (hci_stack->control && hci_stack->control->on){ 1949 err = (*hci_stack->control->on)(hci_stack->config); 1950 } 1951 if (err){ 1952 log_error( "POWER_ON failed"); 1953 hci_emit_hci_open_failed(); 1954 return err; 1955 } 1956 1957 // open low-level device 1958 err = hci_stack->hci_transport->open(hci_stack->config); 1959 if (err){ 1960 log_error( "HCI_INIT failed, turning Bluetooth off again"); 1961 if (hci_stack->control && hci_stack->control->off){ 1962 (*hci_stack->control->off)(hci_stack->config); 1963 } 1964 hci_emit_hci_open_failed(); 1965 return err; 1966 } 1967 return 0; 1968 } 1969 1970 static void hci_power_control_off(void){ 1971 1972 log_info("hci_power_control_off"); 1973 1974 // close low-level device 1975 hci_stack->hci_transport->close(hci_stack->config); 1976 1977 log_info("hci_power_control_off - hci_transport closed"); 1978 1979 // power off 1980 if (hci_stack->control && hci_stack->control->off){ 1981 (*hci_stack->control->off)(hci_stack->config); 1982 } 1983 1984 log_info("hci_power_control_off - control closed"); 1985 1986 hci_stack->state = HCI_STATE_OFF; 1987 } 1988 1989 static void hci_power_control_sleep(void){ 1990 1991 log_info("hci_power_control_sleep"); 1992 1993 #if 0 1994 // don't close serial port during sleep 1995 1996 // close low-level device 1997 hci_stack->hci_transport->close(hci_stack->config); 1998 #endif 1999 2000 // sleep mode 2001 if (hci_stack->control && hci_stack->control->sleep){ 2002 (*hci_stack->control->sleep)(hci_stack->config); 2003 } 2004 2005 hci_stack->state = HCI_STATE_SLEEPING; 2006 } 2007 2008 static int hci_power_control_wake(void){ 2009 2010 log_info("hci_power_control_wake"); 2011 2012 // wake on 2013 if (hci_stack->control && hci_stack->control->wake){ 2014 (*hci_stack->control->wake)(hci_stack->config); 2015 } 2016 2017 #if 0 2018 // open low-level device 2019 int err = hci_stack->hci_transport->open(hci_stack->config); 2020 if (err){ 2021 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2022 if (hci_stack->control && hci_stack->control->off){ 2023 (*hci_stack->control->off)(hci_stack->config); 2024 } 2025 hci_emit_hci_open_failed(); 2026 return err; 2027 } 2028 #endif 2029 2030 return 0; 2031 } 2032 2033 static void hci_power_transition_to_initializing(void){ 2034 // set up state machine 2035 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2036 hci_stack->hci_packet_buffer_reserved = 0; 2037 hci_stack->state = HCI_STATE_INITIALIZING; 2038 hci_stack->substate = HCI_INIT_SEND_RESET; 2039 } 2040 2041 int hci_power_control(HCI_POWER_MODE power_mode){ 2042 2043 log_info("hci_power_control: %u, current mode %u", power_mode, hci_stack->state); 2044 2045 int err = 0; 2046 switch (hci_stack->state){ 2047 2048 case HCI_STATE_OFF: 2049 switch (power_mode){ 2050 case HCI_POWER_ON: 2051 err = hci_power_control_on(); 2052 if (err) { 2053 log_error("hci_power_control_on() error %u", err); 2054 return err; 2055 } 2056 hci_power_transition_to_initializing(); 2057 break; 2058 case HCI_POWER_OFF: 2059 // do nothing 2060 break; 2061 case HCI_POWER_SLEEP: 2062 // do nothing (with SLEEP == OFF) 2063 break; 2064 } 2065 break; 2066 2067 case HCI_STATE_INITIALIZING: 2068 switch (power_mode){ 2069 case HCI_POWER_ON: 2070 // do nothing 2071 break; 2072 case HCI_POWER_OFF: 2073 // no connections yet, just turn it off 2074 hci_power_control_off(); 2075 break; 2076 case HCI_POWER_SLEEP: 2077 // no connections yet, just turn it off 2078 hci_power_control_sleep(); 2079 break; 2080 } 2081 break; 2082 2083 case HCI_STATE_WORKING: 2084 switch (power_mode){ 2085 case HCI_POWER_ON: 2086 // do nothing 2087 break; 2088 case HCI_POWER_OFF: 2089 // see hci_run 2090 hci_stack->state = HCI_STATE_HALTING; 2091 break; 2092 case HCI_POWER_SLEEP: 2093 // see hci_run 2094 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2095 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2096 break; 2097 } 2098 break; 2099 2100 case HCI_STATE_HALTING: 2101 switch (power_mode){ 2102 case HCI_POWER_ON: 2103 hci_power_transition_to_initializing(); 2104 break; 2105 case HCI_POWER_OFF: 2106 // do nothing 2107 break; 2108 case HCI_POWER_SLEEP: 2109 // see hci_run 2110 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2111 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2112 break; 2113 } 2114 break; 2115 2116 case HCI_STATE_FALLING_ASLEEP: 2117 switch (power_mode){ 2118 case HCI_POWER_ON: 2119 2120 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2121 // nothing to do, if H4 supports power management 2122 if (bt_control_iphone_power_management_enabled()){ 2123 hci_stack->state = HCI_STATE_INITIALIZING; 2124 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2125 break; 2126 } 2127 #endif 2128 hci_power_transition_to_initializing(); 2129 break; 2130 case HCI_POWER_OFF: 2131 // see hci_run 2132 hci_stack->state = HCI_STATE_HALTING; 2133 break; 2134 case HCI_POWER_SLEEP: 2135 // do nothing 2136 break; 2137 } 2138 break; 2139 2140 case HCI_STATE_SLEEPING: 2141 switch (power_mode){ 2142 case HCI_POWER_ON: 2143 2144 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2145 // nothing to do, if H4 supports power management 2146 if (bt_control_iphone_power_management_enabled()){ 2147 hci_stack->state = HCI_STATE_INITIALIZING; 2148 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2149 hci_update_scan_enable(); 2150 break; 2151 } 2152 #endif 2153 err = hci_power_control_wake(); 2154 if (err) return err; 2155 hci_power_transition_to_initializing(); 2156 break; 2157 case HCI_POWER_OFF: 2158 hci_stack->state = HCI_STATE_HALTING; 2159 break; 2160 case HCI_POWER_SLEEP: 2161 // do nothing 2162 break; 2163 } 2164 break; 2165 } 2166 2167 // create internal event 2168 hci_emit_state(); 2169 2170 // trigger next/first action 2171 hci_run(); 2172 2173 return 0; 2174 } 2175 2176 static void hci_update_scan_enable(void){ 2177 // 2 = page scan, 1 = inq scan 2178 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2179 hci_run(); 2180 } 2181 2182 void hci_discoverable_control(uint8_t enable){ 2183 if (enable) enable = 1; // normalize argument 2184 2185 if (hci_stack->discoverable == enable){ 2186 hci_emit_discoverable_enabled(hci_stack->discoverable); 2187 return; 2188 } 2189 2190 hci_stack->discoverable = enable; 2191 hci_update_scan_enable(); 2192 } 2193 2194 void hci_connectable_control(uint8_t enable){ 2195 if (enable) enable = 1; // normalize argument 2196 2197 // don't emit event 2198 if (hci_stack->connectable == enable) return; 2199 2200 hci_stack->connectable = enable; 2201 hci_update_scan_enable(); 2202 } 2203 2204 void hci_local_bd_addr(bd_addr_t address_buffer){ 2205 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2206 } 2207 2208 void hci_run(void){ 2209 2210 // log_info("hci_run: entered"); 2211 linked_item_t * it; 2212 2213 // send continuation fragments first, as they block the prepared packet buffer 2214 if (hci_stack->acl_fragmentation_total_size > 0) { 2215 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2216 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2217 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2218 if (connection) { 2219 hci_send_acl_packet_fragments(connection); 2220 return; 2221 } 2222 // connection gone -> discard further fragments 2223 hci_stack->acl_fragmentation_total_size = 0; 2224 hci_stack->acl_fragmentation_pos = 0; 2225 } 2226 } 2227 2228 if (!hci_can_send_command_packet_now()) return; 2229 2230 // global/non-connection oriented commands 2231 2232 // decline incoming connections 2233 if (hci_stack->decline_reason){ 2234 uint8_t reason = hci_stack->decline_reason; 2235 hci_stack->decline_reason = 0; 2236 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2237 return; 2238 } 2239 2240 // send scan enable 2241 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2242 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2243 hci_stack->new_scan_enable_value = 0xff; 2244 return; 2245 } 2246 2247 #ifdef HAVE_BLE 2248 if (hci_stack->state == HCI_STATE_WORKING){ 2249 // handle le scan 2250 switch(hci_stack->le_scanning_state){ 2251 case LE_START_SCAN: 2252 hci_stack->le_scanning_state = LE_SCANNING; 2253 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2254 return; 2255 2256 case LE_STOP_SCAN: 2257 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2258 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2259 return; 2260 default: 2261 break; 2262 } 2263 if (hci_stack->le_scan_type != 0xff){ 2264 // defaults: active scanning, accept all advertisement packets 2265 int scan_type = hci_stack->le_scan_type; 2266 hci_stack->le_scan_type = 0xff; 2267 hci_send_cmd(&hci_le_set_scan_parameters, scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->adv_addr_type, 0); 2268 return; 2269 } 2270 // le advertisement control 2271 if (hci_stack->le_advertisements_todo){ 2272 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2273 } 2274 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2275 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2276 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2277 return; 2278 } 2279 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2280 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2281 hci_send_cmd(&hci_le_set_advertising_parameters, 2282 hci_stack->le_advertisements_interval_min, 2283 hci_stack->le_advertisements_interval_max, 2284 hci_stack->le_advertisements_type, 2285 hci_stack->le_advertisements_own_address_type, 2286 hci_stack->le_advertisements_direct_address_type, 2287 hci_stack->le_advertisements_direct_address, 2288 hci_stack->le_advertisements_channel_map, 2289 hci_stack->le_advertisements_filter_policy); 2290 return; 2291 } 2292 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_DATA){ 2293 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_DATA; 2294 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2295 hci_stack->le_advertisements_data); 2296 return; 2297 } 2298 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2299 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2300 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2301 return; 2302 } 2303 2304 // 2305 // LE Whitelist Management 2306 // 2307 2308 // check if whitelist needs modification 2309 linked_list_iterator_t lit; 2310 int modification_pending = 0; 2311 linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2312 while (linked_list_iterator_has_next(&lit)){ 2313 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&lit); 2314 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2315 modification_pending = 1; 2316 break; 2317 } 2318 } 2319 2320 if (modification_pending){ 2321 // stop connnecting if modification pending 2322 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2323 hci_send_cmd(&hci_le_create_connection_cancel); 2324 return; 2325 } 2326 2327 // add/remove entries 2328 linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2329 while (linked_list_iterator_has_next(&lit)){ 2330 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&lit); 2331 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2332 entry->state = LE_WHITELIST_ON_CONTROLLER; 2333 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2334 return; 2335 2336 } 2337 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2338 bd_addr_t address; 2339 bd_addr_type_t address_type = entry->address_type; 2340 memcpy(address, entry->address, 6); 2341 linked_list_remove(&hci_stack->le_whitelist, (linked_item_t *) entry); 2342 btstack_memory_whitelist_entry_free(entry); 2343 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2344 return; 2345 } 2346 } 2347 } 2348 2349 // start connecting 2350 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2351 !linked_list_empty(&hci_stack->le_whitelist)){ 2352 bd_addr_t null_addr; 2353 memset(null_addr, 0, 6); 2354 hci_send_cmd(&hci_le_create_connection, 2355 0x0060, // scan interval: 60 ms 2356 0x0030, // scan interval: 30 ms 2357 1, // use whitelist 2358 0, // peer address type 2359 null_addr, // peer bd addr 2360 hci_stack->adv_addr_type, // our addr type: 2361 0x0008, // conn interval min 2362 0x0018, // conn interval max 2363 0, // conn latency 2364 0x0048, // supervision timeout 2365 0x0001, // min ce length 2366 0x0001 // max ce length 2367 ); 2368 return; 2369 } 2370 } 2371 #endif 2372 2373 // send pending HCI commands 2374 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 2375 hci_connection_t * connection = (hci_connection_t *) it; 2376 2377 switch(connection->state){ 2378 case SEND_CREATE_CONNECTION: 2379 switch(connection->address_type){ 2380 case BD_ADDR_TYPE_CLASSIC: 2381 log_info("sending hci_create_connection"); 2382 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2383 break; 2384 default: 2385 #ifdef HAVE_BLE 2386 log_info("sending hci_le_create_connection"); 2387 hci_send_cmd(&hci_le_create_connection, 2388 0x0060, // scan interval: 60 ms 2389 0x0030, // scan interval: 30 ms 2390 0, // don't use whitelist 2391 connection->address_type, // peer address type 2392 connection->address, // peer bd addr 2393 hci_stack->adv_addr_type, // our addr type: 2394 0x0008, // conn interval min 2395 0x0018, // conn interval max 2396 0, // conn latency 2397 0x0048, // supervision timeout 2398 0x0001, // min ce length 2399 0x0001 // max ce length 2400 ); 2401 2402 connection->state = SENT_CREATE_CONNECTION; 2403 #endif 2404 break; 2405 } 2406 return; 2407 2408 case RECEIVED_CONNECTION_REQUEST: 2409 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2410 connection->state = ACCEPTED_CONNECTION_REQUEST; 2411 connection->role = HCI_ROLE_SLAVE; 2412 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2413 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2414 } else { 2415 // remote supported feature eSCO is set if link type is eSCO 2416 uint16_t max_latency; 2417 uint8_t retransmission_effort; 2418 uint16_t packet_types; 2419 // remote supported feature eSCO is set if link type is eSCO 2420 if (connection->remote_supported_feature_eSCO){ 2421 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 2422 max_latency = 0x000c; 2423 retransmission_effort = 0x02; 2424 packet_types = 0x388; 2425 } else { 2426 // SCO: max latency, retransmission interval: N/A. any packet type 2427 max_latency = 0xffff; 2428 retransmission_effort = 0xff; 2429 packet_types = 0x003f; 2430 } 2431 hci_send_cmd(&hci_accept_synchronous_connection, connection->address, 8000, 8000, max_latency, hci_stack->sco_voice_setting, retransmission_effort, packet_types); 2432 } 2433 return; 2434 2435 #ifdef HAVE_BLE 2436 case SEND_CANCEL_CONNECTION: 2437 connection->state = SENT_CANCEL_CONNECTION; 2438 hci_send_cmd(&hci_le_create_connection_cancel); 2439 return; 2440 #endif 2441 case SEND_DISCONNECT: 2442 connection->state = SENT_DISCONNECT; 2443 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2444 return; 2445 2446 default: 2447 break; 2448 } 2449 2450 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2451 log_info("responding to link key request"); 2452 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2453 link_key_t link_key; 2454 link_key_type_t link_key_type; 2455 if ( hci_stack->remote_device_db 2456 && hci_stack->remote_device_db->get_link_key(connection->address, link_key, &link_key_type) 2457 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2458 connection->link_key_type = link_key_type; 2459 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2460 } else { 2461 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2462 } 2463 return; 2464 } 2465 2466 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2467 log_info("denying to pin request"); 2468 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2469 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2470 return; 2471 } 2472 2473 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2474 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2475 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2476 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2477 // tweak authentication requirements 2478 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2479 if (connection->bonding_flags & BONDING_DEDICATED){ 2480 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2481 } 2482 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2483 authreq |= 1; 2484 } 2485 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2486 } else { 2487 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2488 } 2489 return; 2490 } 2491 2492 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2493 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2494 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2495 return; 2496 } 2497 2498 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2499 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2500 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2501 return; 2502 } 2503 2504 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2505 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2506 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2507 return; 2508 } 2509 2510 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2511 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2512 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2513 return; 2514 } 2515 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2516 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2517 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2518 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2519 return; 2520 } 2521 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2522 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2523 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2524 return; 2525 } 2526 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2527 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2528 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2529 return; 2530 } 2531 2532 #ifdef HAVE_BLE 2533 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2534 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2535 2536 uint16_t connection_interval_min = connection->le_conn_interval_min; 2537 connection->le_conn_interval_min = 0; 2538 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2539 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2540 0x0000, 0xffff); 2541 } 2542 #endif 2543 } 2544 2545 hci_connection_t * connection; 2546 switch (hci_stack->state){ 2547 case HCI_STATE_INITIALIZING: 2548 hci_initializing_run(); 2549 break; 2550 2551 case HCI_STATE_HALTING: 2552 2553 log_info("HCI_STATE_HALTING"); 2554 2555 // free whitelist entries 2556 #ifdef HAVE_BLE 2557 { 2558 linked_list_iterator_t lit; 2559 linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2560 while (linked_list_iterator_has_next(&lit)){ 2561 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&lit); 2562 linked_list_remove(&hci_stack->le_whitelist, (linked_item_t *) entry); 2563 btstack_memory_whitelist_entry_free(entry); 2564 } 2565 } 2566 #endif 2567 // close all open connections 2568 connection = (hci_connection_t *) hci_stack->connections; 2569 if (connection){ 2570 uint16_t con_handle = (uint16_t) connection->con_handle; 2571 if (!hci_can_send_command_packet_now()) return; 2572 2573 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2574 2575 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2576 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2577 2578 // ... which would be ignored anyway as we shutdown (free) the connection now 2579 hci_shutdown_connection(connection); 2580 2581 // finally, send the disconnect command 2582 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2583 return; 2584 } 2585 log_info("HCI_STATE_HALTING, calling off"); 2586 2587 // switch mode 2588 hci_power_control_off(); 2589 2590 log_info("HCI_STATE_HALTING, emitting state"); 2591 hci_emit_state(); 2592 log_info("HCI_STATE_HALTING, done"); 2593 break; 2594 2595 case HCI_STATE_FALLING_ASLEEP: 2596 switch(hci_stack->substate) { 2597 case HCI_FALLING_ASLEEP_DISCONNECT: 2598 log_info("HCI_STATE_FALLING_ASLEEP"); 2599 // close all open connections 2600 connection = (hci_connection_t *) hci_stack->connections; 2601 2602 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2603 // don't close connections, if H4 supports power management 2604 if (bt_control_iphone_power_management_enabled()){ 2605 connection = NULL; 2606 } 2607 #endif 2608 if (connection){ 2609 2610 // send disconnect 2611 if (!hci_can_send_command_packet_now()) return; 2612 2613 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2614 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2615 2616 // send disconnected event right away - causes higher layer connections to get closed, too. 2617 hci_shutdown_connection(connection); 2618 return; 2619 } 2620 2621 if (hci_classic_supported()){ 2622 // disable page and inquiry scan 2623 if (!hci_can_send_command_packet_now()) return; 2624 2625 log_info("HCI_STATE_HALTING, disabling inq scans"); 2626 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2627 2628 // continue in next sub state 2629 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2630 break; 2631 } 2632 // fall through for ble-only chips 2633 2634 case HCI_FALLING_ASLEEP_COMPLETE: 2635 log_info("HCI_STATE_HALTING, calling sleep"); 2636 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2637 // don't actually go to sleep, if H4 supports power management 2638 if (bt_control_iphone_power_management_enabled()){ 2639 // SLEEP MODE reached 2640 hci_stack->state = HCI_STATE_SLEEPING; 2641 hci_emit_state(); 2642 break; 2643 } 2644 #endif 2645 // switch mode 2646 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2647 hci_emit_state(); 2648 break; 2649 2650 default: 2651 break; 2652 } 2653 break; 2654 2655 default: 2656 break; 2657 } 2658 } 2659 2660 int hci_send_cmd_packet(uint8_t *packet, int size){ 2661 bd_addr_t addr; 2662 hci_connection_t * conn; 2663 // house-keeping 2664 2665 // create_connection? 2666 if (IS_COMMAND(packet, hci_create_connection)){ 2667 bt_flip_addr(addr, &packet[3]); 2668 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2669 2670 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2671 if (!conn){ 2672 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2673 if (!conn){ 2674 // notify client that alloc failed 2675 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2676 return 0; // don't sent packet to controller 2677 } 2678 conn->state = SEND_CREATE_CONNECTION; 2679 } 2680 log_info("conn state %u", conn->state); 2681 switch (conn->state){ 2682 // if connection active exists 2683 case OPEN: 2684 // and OPEN, emit connection complete command, don't send to controller 2685 hci_emit_connection_complete(conn, 0); 2686 return 0; 2687 case SEND_CREATE_CONNECTION: 2688 // connection created by hci, e.g. dedicated bonding 2689 break; 2690 default: 2691 // otherwise, just ignore as it is already in the open process 2692 return 0; 2693 } 2694 conn->state = SENT_CREATE_CONNECTION; 2695 } 2696 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2697 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2698 } 2699 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2700 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2701 } 2702 2703 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2704 if (hci_stack->remote_device_db){ 2705 bt_flip_addr(addr, &packet[3]); 2706 hci_stack->remote_device_db->delete_link_key(addr); 2707 } 2708 } 2709 2710 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2711 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2712 bt_flip_addr(addr, &packet[3]); 2713 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2714 if (conn){ 2715 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2716 } 2717 } 2718 2719 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2720 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2721 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2722 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2723 bt_flip_addr(addr, &packet[3]); 2724 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2725 if (conn){ 2726 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2727 } 2728 } 2729 2730 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2731 hci_stack->loopback_mode = packet[3]; 2732 } 2733 2734 #ifdef HAVE_BLE 2735 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2736 hci_stack->adv_addr_type = packet[8]; 2737 } 2738 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2739 bt_flip_addr(hci_stack->adv_address, &packet[3]); 2740 } 2741 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 2742 hci_stack->le_advertisements_active = packet[3]; 2743 } 2744 if (IS_COMMAND(packet, hci_le_create_connection)){ 2745 // white list used? 2746 uint8_t initiator_filter_policy = packet[7]; 2747 switch (initiator_filter_policy){ 2748 case 0: 2749 // whitelist not used 2750 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 2751 break; 2752 case 1: 2753 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 2754 break; 2755 default: 2756 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 2757 break; 2758 } 2759 } 2760 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 2761 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2762 } 2763 #endif 2764 2765 hci_stack->num_cmd_packets--; 2766 2767 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2768 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2769 2770 // release packet buffer for synchronous transport implementations 2771 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 2772 hci_stack->hci_packet_buffer_reserved = 0; 2773 } 2774 2775 return err; 2776 } 2777 2778 // disconnect because of security block 2779 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 2780 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2781 if (!connection) return; 2782 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2783 } 2784 2785 2786 // Configure Secure Simple Pairing 2787 2788 // enable will enable SSP during init 2789 void hci_ssp_set_enable(int enable){ 2790 hci_stack->ssp_enable = enable; 2791 } 2792 2793 int hci_local_ssp_activated(void){ 2794 return hci_ssp_supported() && hci_stack->ssp_enable; 2795 } 2796 2797 // if set, BTstack will respond to io capability request using authentication requirement 2798 void hci_ssp_set_io_capability(int io_capability){ 2799 hci_stack->ssp_io_capability = io_capability; 2800 } 2801 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 2802 hci_stack->ssp_authentication_requirement = authentication_requirement; 2803 } 2804 2805 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 2806 void hci_ssp_set_auto_accept(int auto_accept){ 2807 hci_stack->ssp_auto_accept = auto_accept; 2808 } 2809 2810 /** 2811 * pre: numcmds >= 0 - it's allowed to send a command to the controller 2812 */ 2813 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 2814 2815 if (!hci_can_send_command_packet_now()){ 2816 log_error("hci_send_cmd called but cannot send packet now"); 2817 return 0; 2818 } 2819 2820 // for HCI INITIALIZATION 2821 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 2822 hci_stack->last_cmd_opcode = cmd->opcode; 2823 2824 hci_reserve_packet_buffer(); 2825 uint8_t * packet = hci_stack->hci_packet_buffer; 2826 2827 va_list argptr; 2828 va_start(argptr, cmd); 2829 uint16_t size = hci_create_cmd_internal(packet, cmd, argptr); 2830 va_end(argptr); 2831 2832 return hci_send_cmd_packet(packet, size); 2833 } 2834 2835 // Create various non-HCI events. 2836 // TODO: generalize, use table similar to hci_create_command 2837 2838 void hci_emit_state(void){ 2839 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 2840 uint8_t event[3]; 2841 event[0] = BTSTACK_EVENT_STATE; 2842 event[1] = sizeof(event) - 2; 2843 event[2] = hci_stack->state; 2844 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2845 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2846 } 2847 2848 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 2849 uint8_t event[13]; 2850 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 2851 event[1] = sizeof(event) - 2; 2852 event[2] = status; 2853 bt_store_16(event, 3, conn->con_handle); 2854 bt_flip_addr(&event[5], conn->address); 2855 event[11] = 1; // ACL connection 2856 event[12] = 0; // encryption disabled 2857 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2858 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2859 } 2860 2861 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, uint16_t conn_handle, uint8_t status){ 2862 uint8_t event[21]; 2863 event[0] = HCI_EVENT_LE_META; 2864 event[1] = sizeof(event) - 2; 2865 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 2866 event[3] = status; 2867 bt_store_16(event, 4, conn_handle); 2868 event[6] = 0; // TODO: role 2869 event[7] = address_type; 2870 bt_flip_addr(&event[8], address); 2871 bt_store_16(event, 14, 0); // interval 2872 bt_store_16(event, 16, 0); // latency 2873 bt_store_16(event, 18, 0); // supervision timeout 2874 event[20] = 0; // master clock accuracy 2875 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2876 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2877 } 2878 2879 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 2880 uint8_t event[6]; 2881 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 2882 event[1] = sizeof(event) - 2; 2883 event[2] = 0; // status = OK 2884 bt_store_16(event, 3, handle); 2885 event[5] = reason; 2886 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2887 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2888 } 2889 2890 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 2891 if (disable_l2cap_timeouts) return; 2892 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 2893 uint8_t event[4]; 2894 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 2895 event[1] = sizeof(event) - 2; 2896 bt_store_16(event, 2, conn->con_handle); 2897 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2898 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2899 } 2900 2901 void hci_emit_nr_connections_changed(void){ 2902 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 2903 uint8_t event[3]; 2904 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 2905 event[1] = sizeof(event) - 2; 2906 event[2] = nr_hci_connections(); 2907 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2908 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2909 } 2910 2911 void hci_emit_hci_open_failed(void){ 2912 log_info("BTSTACK_EVENT_POWERON_FAILED"); 2913 uint8_t event[2]; 2914 event[0] = BTSTACK_EVENT_POWERON_FAILED; 2915 event[1] = sizeof(event) - 2; 2916 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2917 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2918 } 2919 2920 #ifndef EMBEDDED 2921 void hci_emit_btstack_version(void){ 2922 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 2923 uint8_t event[6]; 2924 event[0] = BTSTACK_EVENT_VERSION; 2925 event[1] = sizeof(event) - 2; 2926 event[2] = BTSTACK_MAJOR; 2927 event[3] = BTSTACK_MINOR; 2928 bt_store_16(event, 4, 3257); // last SVN commit on Google Code + 1 2929 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2930 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2931 } 2932 #endif 2933 2934 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 2935 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 2936 uint8_t event[3]; 2937 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 2938 event[1] = sizeof(event) - 2; 2939 event[2] = enabled; 2940 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2941 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2942 } 2943 2944 void hci_emit_remote_name_cached(bd_addr_t addr, device_name_t *name){ 2945 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 2946 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 2947 event[1] = sizeof(event) - 2 - 1; 2948 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 2949 bt_flip_addr(&event[3], addr); 2950 memcpy(&event[9], name, 248); 2951 2952 event[9+248] = 0; // assert \0 for log_info 2953 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(addr), &event[9]); 2954 2955 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 2956 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 2957 } 2958 2959 void hci_emit_discoverable_enabled(uint8_t enabled){ 2960 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 2961 uint8_t event[3]; 2962 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 2963 event[1] = sizeof(event) - 2; 2964 event[2] = enabled; 2965 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2966 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2967 } 2968 2969 void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 2970 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 2971 uint8_t event[5]; 2972 int pos = 0; 2973 event[pos++] = GAP_SECURITY_LEVEL; 2974 event[pos++] = sizeof(event) - 2; 2975 bt_store_16(event, 2, con_handle); 2976 pos += 2; 2977 event[pos++] = level; 2978 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2979 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2980 } 2981 2982 void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 2983 log_info("hci_emit_dedicated_bonding_result %u ", status); 2984 uint8_t event[9]; 2985 int pos = 0; 2986 event[pos++] = GAP_DEDICATED_BONDING_COMPLETED; 2987 event[pos++] = sizeof(event) - 2; 2988 event[pos++] = status; 2989 bt_flip_addr( &event[pos], address); 2990 pos += 6; 2991 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2992 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2993 } 2994 2995 // query if remote side supports eSCO 2996 int hci_remote_eSCO_supported(hci_con_handle_t con_handle){ 2997 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2998 if (!connection) return 0; 2999 return connection->remote_supported_feature_eSCO; 3000 } 3001 3002 // query if remote side supports SSP 3003 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3004 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3005 if (!connection) return 0; 3006 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3007 } 3008 3009 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3010 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3011 } 3012 3013 // GAP API 3014 /** 3015 * @bbrief enable/disable bonding. default is enabled 3016 * @praram enabled 3017 */ 3018 void gap_set_bondable_mode(int enable){ 3019 hci_stack->bondable = enable ? 1 : 0; 3020 } 3021 /** 3022 * @brief Get bondable mode. 3023 * @return 1 if bondable 3024 */ 3025 int gap_get_bondable_mode(void){ 3026 return hci_stack->bondable; 3027 } 3028 3029 /** 3030 * @brief map link keys to security levels 3031 */ 3032 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3033 switch (link_key_type){ 3034 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3035 return LEVEL_4; 3036 case COMBINATION_KEY: 3037 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3038 return LEVEL_3; 3039 default: 3040 return LEVEL_2; 3041 } 3042 } 3043 3044 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3045 if (!connection) return LEVEL_0; 3046 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3047 return gap_security_level_for_link_key_type(connection->link_key_type); 3048 } 3049 3050 3051 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3052 log_info("gap_mitm_protection_required_for_security_level %u", level); 3053 return level > LEVEL_2; 3054 } 3055 3056 /** 3057 * @brief get current security level 3058 */ 3059 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3060 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3061 if (!connection) return LEVEL_0; 3062 return gap_security_level_for_connection(connection); 3063 } 3064 3065 /** 3066 * @brief request connection to device to 3067 * @result GAP_AUTHENTICATION_RESULT 3068 */ 3069 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3070 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3071 if (!connection){ 3072 hci_emit_security_level(con_handle, LEVEL_0); 3073 return; 3074 } 3075 gap_security_level_t current_level = gap_security_level(con_handle); 3076 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3077 if (current_level >= requested_level){ 3078 hci_emit_security_level(con_handle, current_level); 3079 return; 3080 } 3081 3082 connection->requested_security_level = requested_level; 3083 3084 #if 0 3085 // sending encryption request without a link key results in an error. 3086 // TODO: figure out how to use it properly 3087 3088 // would enabling ecnryption suffice (>= LEVEL_2)? 3089 if (hci_stack->remote_device_db){ 3090 link_key_type_t link_key_type; 3091 link_key_t link_key; 3092 if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3093 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3094 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3095 return; 3096 } 3097 } 3098 } 3099 #endif 3100 3101 // try to authenticate connection 3102 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3103 hci_run(); 3104 } 3105 3106 /** 3107 * @brief start dedicated bonding with device. disconnect after bonding 3108 * @param device 3109 * @param request MITM protection 3110 * @result GAP_DEDICATED_BONDING_COMPLETE 3111 */ 3112 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3113 3114 // create connection state machine 3115 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3116 3117 if (!connection){ 3118 return BTSTACK_MEMORY_ALLOC_FAILED; 3119 } 3120 3121 // delete linkn key 3122 hci_drop_link_key_for_bd_addr(device); 3123 3124 // configure LEVEL_2/3, dedicated bonding 3125 connection->state = SEND_CREATE_CONNECTION; 3126 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3127 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 3128 connection->bonding_flags = BONDING_DEDICATED; 3129 3130 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3131 3132 // handle: connnection failure (connection complete != ok) 3133 // handle: authentication failure 3134 // handle: disconnect on done 3135 3136 hci_run(); 3137 3138 return 0; 3139 } 3140 3141 void gap_set_local_name(const char * local_name){ 3142 hci_stack->local_name = local_name; 3143 } 3144 3145 le_command_status_t le_central_start_scan(void){ 3146 if (hci_stack->le_scanning_state == LE_SCANNING) return BLE_PERIPHERAL_OK; 3147 hci_stack->le_scanning_state = LE_START_SCAN; 3148 hci_run(); 3149 return BLE_PERIPHERAL_OK; 3150 } 3151 3152 le_command_status_t le_central_stop_scan(void){ 3153 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return BLE_PERIPHERAL_OK; 3154 hci_stack->le_scanning_state = LE_STOP_SCAN; 3155 hci_run(); 3156 return BLE_PERIPHERAL_OK; 3157 } 3158 3159 void le_central_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3160 hci_stack->le_scan_type = scan_type; 3161 hci_stack->le_scan_interval = scan_interval; 3162 hci_stack->le_scan_window = scan_window; 3163 hci_run(); 3164 } 3165 3166 le_command_status_t le_central_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3167 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3168 if (!conn){ 3169 log_info("le_central_connect: no connection exists yet, creating context"); 3170 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3171 if (!conn){ 3172 // notify client that alloc failed 3173 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3174 log_info("le_central_connect: failed to alloc hci_connection_t"); 3175 return BLE_PERIPHERAL_NOT_CONNECTED; // don't sent packet to controller 3176 } 3177 conn->state = SEND_CREATE_CONNECTION; 3178 log_info("le_central_connect: send create connection next"); 3179 hci_run(); 3180 return BLE_PERIPHERAL_OK; 3181 } 3182 3183 if (!hci_is_le_connection(conn) || 3184 conn->state == SEND_CREATE_CONNECTION || 3185 conn->state == SENT_CREATE_CONNECTION) { 3186 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3187 log_error("le_central_connect: classic connection or connect is already being created"); 3188 return BLE_PERIPHERAL_IN_WRONG_STATE; 3189 } 3190 3191 log_info("le_central_connect: context exists with state %u", conn->state); 3192 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3193 hci_run(); 3194 return BLE_PERIPHERAL_OK; 3195 } 3196 3197 // @assumption: only a single outgoing LE Connection exists 3198 static hci_connection_t * le_central_get_outgoing_connection(void){ 3199 linked_item_t *it; 3200 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 3201 hci_connection_t * conn = (hci_connection_t *) it; 3202 if (!hci_is_le_connection(conn)) continue; 3203 switch (conn->state){ 3204 case SEND_CREATE_CONNECTION: 3205 case SENT_CREATE_CONNECTION: 3206 return conn; 3207 default: 3208 break; 3209 }; 3210 } 3211 return NULL; 3212 } 3213 3214 le_command_status_t le_central_connect_cancel(void){ 3215 hci_connection_t * conn = le_central_get_outgoing_connection(); 3216 if (!conn) return BLE_PERIPHERAL_OK; 3217 switch (conn->state){ 3218 case SEND_CREATE_CONNECTION: 3219 // skip sending create connection and emit event instead 3220 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3221 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 3222 btstack_memory_hci_connection_free( conn ); 3223 break; 3224 case SENT_CREATE_CONNECTION: 3225 // request to send cancel connection 3226 conn->state = SEND_CANCEL_CONNECTION; 3227 hci_run(); 3228 break; 3229 default: 3230 break; 3231 } 3232 return BLE_PERIPHERAL_OK; 3233 } 3234 3235 /** 3236 * @brief Updates the connection parameters for a given LE connection 3237 * @param handle 3238 * @param conn_interval_min (unit: 1.25ms) 3239 * @param conn_interval_max (unit: 1.25ms) 3240 * @param conn_latency 3241 * @param supervision_timeout (unit: 10ms) 3242 * @returns 0 if ok 3243 */ 3244 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3245 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3246 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3247 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3248 connection->le_conn_interval_min = conn_interval_min; 3249 connection->le_conn_interval_max = conn_interval_max; 3250 connection->le_conn_latency = conn_latency; 3251 connection->le_supervision_timeout = supervision_timeout; 3252 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3253 hci_run(); 3254 return 0; 3255 } 3256 3257 /** 3258 * @brief Request an update of the connection parameter for a given LE connection 3259 * @param handle 3260 * @param conn_interval_min (unit: 1.25ms) 3261 * @param conn_interval_max (unit: 1.25ms) 3262 * @param conn_latency 3263 * @param supervision_timeout (unit: 10ms) 3264 * @returns 0 if ok 3265 */ 3266 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3267 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3268 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3269 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3270 connection->le_conn_interval_min = conn_interval_min; 3271 connection->le_conn_interval_max = conn_interval_max; 3272 connection->le_conn_latency = conn_latency; 3273 connection->le_supervision_timeout = supervision_timeout; 3274 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3275 hci_run(); 3276 return 0; 3277 } 3278 3279 /** 3280 * @brief Set Advertisement Data 3281 * @param advertising_data_length 3282 * @param advertising_data (max 31 octets) 3283 * @note data is not copied, pointer has to stay valid 3284 */ 3285 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3286 hci_stack->le_advertisements_data_len = advertising_data_length; 3287 hci_stack->le_advertisements_data = advertising_data; 3288 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_DATA; 3289 // disable advertisements before setting data 3290 if (hci_stack->le_advertisements_active){ 3291 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3292 } 3293 hci_run(); 3294 } 3295 3296 /** 3297 * @brief Set Advertisement Parameters 3298 * @param adv_int_min 3299 * @param adv_int_max 3300 * @param adv_type 3301 * @param own_address_type 3302 * @param direct_address_type 3303 * @param direct_address 3304 * @param channel_map 3305 * @param filter_policy 3306 * 3307 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3308 */ 3309 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3310 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3311 uint8_t channel_map, uint8_t filter_policy) { 3312 3313 hci_stack->le_advertisements_interval_min = adv_int_min; 3314 hci_stack->le_advertisements_interval_max = adv_int_max; 3315 hci_stack->le_advertisements_type = adv_type; 3316 hci_stack->le_advertisements_own_address_type = own_address_type; 3317 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3318 hci_stack->le_advertisements_channel_map = channel_map; 3319 hci_stack->le_advertisements_filter_policy = filter_policy; 3320 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3321 3322 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3323 // disable advertisements before changing params 3324 if (hci_stack->le_advertisements_active){ 3325 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3326 } 3327 hci_run(); 3328 } 3329 3330 /** 3331 * @brief Enable/Disable Advertisements 3332 * @param enabled 3333 */ 3334 void gap_advertisements_enable(int enabled){ 3335 hci_stack->le_advertisements_enabled = enabled; 3336 if (enabled && !hci_stack->le_advertisements_active){ 3337 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3338 } 3339 if (!enabled && hci_stack->le_advertisements_active){ 3340 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3341 } 3342 hci_run(); 3343 } 3344 3345 3346 le_command_status_t gap_disconnect(hci_con_handle_t handle){ 3347 hci_connection_t * conn = hci_connection_for_handle(handle); 3348 if (!conn){ 3349 hci_emit_disconnection_complete(handle, 0); 3350 return BLE_PERIPHERAL_OK; 3351 } 3352 conn->state = SEND_DISCONNECT; 3353 hci_run(); 3354 return BLE_PERIPHERAL_OK; 3355 } 3356 3357 /** 3358 * @brief Get connection type 3359 * @param con_handle 3360 * @result connection_type 3361 */ 3362 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3363 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3364 if (!conn) return GAP_CONNECTION_INVALID; 3365 switch (conn->address_type){ 3366 case BD_ADDR_TYPE_LE_PUBLIC: 3367 case BD_ADDR_TYPE_LE_RANDOM: 3368 return GAP_CONNECTION_LE; 3369 case BD_ADDR_TYPE_SCO: 3370 return GAP_CONNECTION_SCO; 3371 case BD_ADDR_TYPE_CLASSIC: 3372 return GAP_CONNECTION_ACL; 3373 default: 3374 return GAP_CONNECTION_INVALID; 3375 } 3376 } 3377 3378 #ifdef HAVE_BLE 3379 3380 /** 3381 * @brief Auto Connection Establishment - Start Connecting to device 3382 * @param address_typ 3383 * @param address 3384 * @returns 0 if ok 3385 */ 3386 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3387 // check capacity 3388 int num_entries = linked_list_count(&hci_stack->le_whitelist); 3389 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3390 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3391 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3392 entry->address_type = address_type; 3393 memcpy(entry->address, address, 6); 3394 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3395 linked_list_add(&hci_stack->le_whitelist, (linked_item_t*) entry); 3396 hci_run(); 3397 return 0; 3398 } 3399 3400 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3401 linked_list_iterator_t it; 3402 linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3403 while (linked_list_iterator_has_next(&it)){ 3404 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&it); 3405 if (entry->address_type != address_type) continue; 3406 if (memcmp(entry->address, address, 6) != 0) continue; 3407 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3408 // remove from controller if already present 3409 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3410 continue; 3411 } 3412 // direclty remove entry from whitelist 3413 linked_list_iterator_remove(&it); 3414 btstack_memory_whitelist_entry_free(entry); 3415 } 3416 } 3417 3418 /** 3419 * @brief Auto Connection Establishment - Stop Connecting to device 3420 * @param address_typ 3421 * @param address 3422 * @returns 0 if ok 3423 */ 3424 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3425 hci_remove_from_whitelist(address_type, address); 3426 hci_run(); 3427 return 0; 3428 } 3429 3430 /** 3431 * @brief Auto Connection Establishment - Stop everything 3432 * @note Convenience function to stop all active auto connection attempts 3433 */ 3434 void gap_auto_connection_stop_all(void){ 3435 linked_list_iterator_t it; 3436 linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3437 while (linked_list_iterator_has_next(&it)){ 3438 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&it); 3439 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3440 // remove from controller if already present 3441 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3442 continue; 3443 } 3444 // directly remove entry from whitelist 3445 linked_list_iterator_remove(&it); 3446 btstack_memory_whitelist_entry_free(entry); 3447 } 3448 hci_run(); 3449 } 3450 3451 #endif 3452 3453 /** 3454 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3455 */ 3456 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3457 hci_stack->sco_voice_setting = voice_setting; 3458 } 3459 3460 /** 3461 * @brief Get SCO Voice Setting 3462 * @return current voice setting 3463 */ 3464 uint16_t hci_get_sco_voice_setting(){ 3465 return hci_stack->sco_voice_setting; 3466 } 3467 3468 /** @brief Get SCO packet length for current SCO Voice setting 3469 * @note Using SCO packets of the exact length is required for USB transfer 3470 * @return Length of SCO packets in bytes (not audio frames) 3471 */ 3472 int hci_get_sco_packet_length(void){ 3473 // see Core Spec for H2 USB Transfer. 3474 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3475 return 27; 3476 } 3477 3478 /** 3479 * @brief Set callback for Bluetooth Hardware Error 3480 */ 3481 void hci_set_hardware_error_callback(void (*fn)(void)){ 3482 hci_stack->hardware_error_callback = fn; 3483 } 3484 3485 3486 void hci_disconnect_all(void){ 3487 linked_list_iterator_t it; 3488 linked_list_iterator_init(&it, &hci_stack->connections); 3489 while (linked_list_iterator_has_next(&it)){ 3490 hci_connection_t * con = (hci_connection_t*) linked_list_iterator_next(&it); 3491 if (con->state == SENT_DISCONNECT) continue; 3492 con->state = SEND_DISCONNECT; 3493 } 3494 hci_run(); 3495 } 3496