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 break; 852 default: 853 break; 854 } 855 } 856 857 static void hci_initializing_next_state(void){ 858 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 859 } 860 861 // assumption: hci_can_send_command_packet_now() == true 862 static void hci_initializing_run(void){ 863 log_info("hci_initializing_run: substate %u", hci_stack->substate); 864 switch (hci_stack->substate){ 865 case HCI_INIT_SEND_RESET: 866 hci_state_reset(); 867 868 #ifndef USE_BLUETOOL 869 // prepare reset if command complete not received in 100ms 870 run_loop_set_timer(&hci_stack->timeout, 100); 871 run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 872 run_loop_add_timer(&hci_stack->timeout); 873 #endif 874 // send command 875 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 876 hci_send_cmd(&hci_reset); 877 break; 878 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 879 hci_send_cmd(&hci_read_local_version_information); 880 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 881 break; 882 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 883 hci_state_reset(); 884 // prepare reset if command complete not received in 100ms 885 run_loop_set_timer(&hci_stack->timeout, 100); 886 run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 887 run_loop_add_timer(&hci_stack->timeout); 888 // send command 889 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 890 hci_send_cmd(&hci_reset); 891 break; 892 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 893 hci_state_reset(); 894 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 895 hci_send_cmd(&hci_reset); 896 break; 897 case HCI_INIT_SET_BD_ADDR: 898 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 899 hci_stack->control->set_bd_addr_cmd(hci_stack->config, hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 900 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 901 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 902 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 903 break; 904 case HCI_INIT_SEND_BAUD_CHANGE: 905 hci_stack->control->baudrate_cmd(hci_stack->config, ((hci_uart_config_t *)hci_stack->config)->baudrate_main, hci_stack->hci_packet_buffer); 906 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 907 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 908 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 909 // STLC25000D: baudrate change happens within 0.5 s after command was send, 910 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 911 if (hci_stack->manufacturer == 0x0030){ 912 run_loop_set_timer(&hci_stack->timeout, 100); 913 run_loop_add_timer(&hci_stack->timeout); 914 } 915 break; 916 case HCI_INIT_CUSTOM_INIT: 917 log_info("Custom init"); 918 // Custom initialization 919 if (hci_stack->control && hci_stack->control->next_cmd){ 920 int valid_cmd = (*hci_stack->control->next_cmd)(hci_stack->config, hci_stack->hci_packet_buffer); 921 if (valid_cmd){ 922 int size = 3 + hci_stack->hci_packet_buffer[2]; 923 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 924 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 925 switch (valid_cmd) { 926 case 1: 927 default: 928 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 929 break; 930 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 931 log_info("CSR Warm Boot"); 932 run_loop_set_timer(&hci_stack->timeout, 100); 933 run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 934 run_loop_add_timer(&hci_stack->timeout); 935 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 936 break; 937 } 938 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 939 break; 940 } 941 log_info("hci_run: init script done"); 942 } 943 // otherwise continue 944 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 945 hci_send_cmd(&hci_read_bd_addr); 946 break; 947 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 948 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 949 hci_send_cmd(&hci_read_local_supported_commands); 950 break; 951 case HCI_INIT_READ_BUFFER_SIZE: 952 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 953 hci_send_cmd(&hci_read_buffer_size); 954 break; 955 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATUES: 956 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATUES; 957 hci_send_cmd(&hci_read_local_supported_features); 958 break; 959 case HCI_INIT_SET_EVENT_MASK: 960 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 961 if (hci_le_supported()){ 962 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 963 } else { 964 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 965 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 966 } 967 break; 968 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 969 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 970 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 971 break; 972 case HCI_INIT_WRITE_PAGE_TIMEOUT: 973 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 974 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 975 break; 976 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 977 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 978 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 979 break; 980 case HCI_INIT_WRITE_LOCAL_NAME: 981 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 982 if (hci_stack->local_name){ 983 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 984 } else { 985 char hostname[30]; 986 #ifdef EMBEDDED 987 // BTstack-11:22:33:44:55:66 988 strcpy(hostname, "BTstack "); 989 strcat(hostname, bd_addr_to_str(hci_stack->local_bd_addr)); 990 log_info("---> Name %s", hostname); 991 #else 992 // hostname for POSIX systems 993 gethostname(hostname, 30); 994 hostname[29] = '\0'; 995 #endif 996 hci_send_cmd(&hci_write_local_name, hostname); 997 } 998 break; 999 case HCI_INIT_WRITE_SCAN_ENABLE: 1000 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1001 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1002 break; 1003 #ifdef HAVE_BLE 1004 // LE INIT 1005 case HCI_INIT_LE_READ_BUFFER_SIZE: 1006 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1007 hci_send_cmd(&hci_le_read_buffer_size); 1008 break; 1009 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1010 // LE Supported Host = 1, Simultaneous Host = 0 1011 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1012 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1013 break; 1014 case HCI_INIT_READ_WHITE_LIST_SIZE: 1015 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1016 hci_send_cmd(&hci_le_read_white_list_size); 1017 break; 1018 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1019 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1020 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1021 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1022 break; 1023 #endif 1024 // DONE 1025 case HCI_INIT_DONE: 1026 // done. 1027 hci_stack->state = HCI_STATE_WORKING; 1028 hci_emit_state(); 1029 return; 1030 default: 1031 return; 1032 } 1033 } 1034 1035 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1036 uint8_t command_completed = 0; 1037 1038 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 1039 uint16_t opcode = READ_BT_16(packet,3); 1040 if (opcode == hci_stack->last_cmd_opcode){ 1041 command_completed = 1; 1042 log_info("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1043 } else { 1044 log_info("Command complete for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1045 } 1046 } 1047 1048 if (packet[0] == HCI_EVENT_COMMAND_STATUS){ 1049 uint8_t status = packet[2]; 1050 uint16_t opcode = READ_BT_16(packet,4); 1051 if (opcode == hci_stack->last_cmd_opcode){ 1052 if (status){ 1053 command_completed = 1; 1054 log_error("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1055 } else { 1056 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1057 } 1058 } else { 1059 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1060 } 1061 } 1062 1063 // Vendor == CSR 1064 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && packet[0] == HCI_EVENT_VENDOR_SPECIFIC){ 1065 // TODO: track actual command 1066 command_completed = 1; 1067 } 1068 1069 // Vendor == Toshiba 1070 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && packet[0] == HCI_EVENT_VENDOR_SPECIFIC){ 1071 // TODO: track actual command 1072 command_completed = 1; 1073 } 1074 1075 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1076 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1077 // 1078 // HCI Reset 1079 // Timeout 100 ms 1080 // HCI Reset 1081 // Command Complete Reset 1082 // HCI Read Local Version Information 1083 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1084 // hang... 1085 // 1086 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1087 if (!command_completed 1088 && packet[0] == HCI_EVENT_COMMAND_COMPLETE 1089 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1090 1091 uint16_t opcode = READ_BT_16(packet,3); 1092 if (opcode == hci_reset.opcode){ 1093 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1094 return; 1095 } 1096 } 1097 1098 1099 1100 if (!command_completed) return; 1101 1102 int need_baud_change = hci_stack->config 1103 && hci_stack->control 1104 && hci_stack->control->baudrate_cmd 1105 && hci_stack->hci_transport->set_baudrate 1106 && ((hci_uart_config_t *)hci_stack->config)->baudrate_main; 1107 1108 int need_addr_change = hci_stack->custom_bd_addr_set 1109 && hci_stack->control 1110 && hci_stack->control->set_bd_addr_cmd; 1111 1112 switch(hci_stack->substate){ 1113 case HCI_INIT_W4_SEND_RESET: 1114 run_loop_remove_timer(&hci_stack->timeout); 1115 break; 1116 case HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION: 1117 if (need_addr_change){ 1118 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1119 return; 1120 } 1121 // skipping addr change 1122 if (need_baud_change){ 1123 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1124 return; 1125 } 1126 // also skip baud change 1127 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1128 return; 1129 case HCI_INIT_W4_SET_BD_ADDR: 1130 // for STLC2500D, bd addr change only gets active after sending reset command 1131 if (hci_stack->manufacturer == 0x0030){ 1132 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1133 return; 1134 } 1135 // skipping warm boot on STLC2500D 1136 if (need_baud_change){ 1137 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1138 return; 1139 } 1140 // skipping baud change 1141 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1142 return; 1143 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1144 if (need_baud_change){ 1145 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1146 return; 1147 } 1148 // skipping baud change 1149 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1150 return; 1151 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1152 // for STLC2500D, baud rate change already happened. 1153 // for CC256x, baud rate gets changed now 1154 if (hci_stack->manufacturer != 0x0030){ 1155 uint32_t new_baud = ((hci_uart_config_t *)hci_stack->config)->baudrate_main; 1156 log_info("Local baud rate change to %"PRIu32, new_baud); 1157 hci_stack->hci_transport->set_baudrate(new_baud); 1158 } 1159 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1160 return; 1161 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1162 run_loop_remove_timer(&hci_stack->timeout); 1163 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1164 return; 1165 case HCI_INIT_W4_CUSTOM_INIT: 1166 // repeat custom init 1167 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1168 return; 1169 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1170 // skip read buffer size if not supported 1171 if (hci_stack->local_supported_commands[0] & 0x01) break; 1172 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATUES; 1173 return; 1174 case HCI_INIT_W4_SET_EVENT_MASK: 1175 // skip Classic init commands for LE only chipsets 1176 if (!hci_classic_supported()){ 1177 if (hci_le_supported()){ 1178 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1179 return; 1180 } else { 1181 log_error("Neither BR/EDR nor LE supported"); 1182 hci_stack->substate = HCI_INIT_DONE; // skip all 1183 return; 1184 } 1185 } 1186 if (!hci_ssp_supported()){ 1187 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1188 return; 1189 } 1190 break; 1191 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1192 // skip write le host if not supported (e.g. on LE only EM9301) 1193 if (hci_stack->local_supported_commands[0] & 0x02) break; 1194 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1195 return; 1196 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1197 if (!hci_le_supported()){ 1198 // SKIP LE init for Classic only configuration 1199 hci_stack->substate = HCI_INIT_DONE; 1200 return; 1201 } 1202 default: 1203 break; 1204 } 1205 hci_initializing_next_state(); 1206 } 1207 1208 1209 // avoid huge local variables 1210 #ifndef EMBEDDED 1211 static device_name_t device_name; 1212 #endif 1213 static void event_handler(uint8_t *packet, int size){ 1214 1215 uint16_t event_length = packet[1]; 1216 1217 // assert packet is complete 1218 if (size != event_length + 2){ 1219 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 1220 return; 1221 } 1222 1223 bd_addr_t addr; 1224 bd_addr_type_t addr_type; 1225 uint8_t link_type; 1226 hci_con_handle_t handle; 1227 hci_connection_t * conn; 1228 int i; 1229 1230 // log_info("HCI:EVENT:%02x", packet[0]); 1231 1232 switch (packet[0]) { 1233 1234 case HCI_EVENT_COMMAND_COMPLETE: 1235 // get num cmd packets 1236 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1237 hci_stack->num_cmd_packets = packet[2]; 1238 1239 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 1240 // from offset 5 1241 // status 1242 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1243 hci_stack->acl_data_packet_length = READ_BT_16(packet, 6); 1244 hci_stack->sco_data_packet_length = packet[8]; 1245 hci_stack->acl_packets_total_num = READ_BT_16(packet, 9); 1246 hci_stack->sco_packets_total_num = READ_BT_16(packet, 11); 1247 1248 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1249 // determine usable ACL payload size 1250 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1251 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1252 } 1253 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1254 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1255 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1256 } 1257 } 1258 #ifdef HAVE_BLE 1259 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 1260 hci_stack->le_data_packets_length = READ_BT_16(packet, 6); 1261 hci_stack->le_acl_packets_total_num = packet[8]; 1262 // determine usable ACL payload size 1263 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1264 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1265 } 1266 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1267 } 1268 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_white_list_size)){ 1269 hci_stack->le_whitelist_capacity = READ_BT_16(packet, 6); 1270 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1271 } 1272 #endif 1273 // Dump local address 1274 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 1275 bt_flip_addr(hci_stack->local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 1276 log_info("Local Address, Status: 0x%02x: Addr: %s", 1277 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1278 } 1279 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1280 hci_emit_discoverable_enabled(hci_stack->discoverable); 1281 } 1282 // Note: HCI init checks 1283 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 1284 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1285 1286 // determine usable ACL packet types based on host buffer size and supported features 1287 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1288 log_info("packet types %04x", hci_stack->packet_types); 1289 1290 // Classic/LE 1291 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1292 } 1293 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_version_information)){ 1294 // hci_stack->hci_version = READ_BT_16(packet, 4); 1295 // hci_stack->hci_revision = READ_BT_16(packet, 6); 1296 // hci_stack->lmp_version = READ_BT_16(packet, 8); 1297 hci_stack->manufacturer = READ_BT_16(packet, 10); 1298 // hci_stack->lmp_subversion = READ_BT_16(packet, 12); 1299 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1300 } 1301 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_commands)){ 1302 hci_stack->local_supported_commands[0] = 1303 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0X80) >> 7 | // Octet 14, bit 7 1304 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5; // Octet 24, bit 6 1305 } 1306 break; 1307 1308 case HCI_EVENT_COMMAND_STATUS: 1309 // get num cmd packets 1310 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1311 hci_stack->num_cmd_packets = packet[3]; 1312 break; 1313 1314 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1315 int offset = 3; 1316 for (i=0; i<packet[2];i++){ 1317 handle = READ_BT_16(packet, offset); 1318 offset += 2; 1319 uint16_t num_packets = READ_BT_16(packet, offset); 1320 offset += 2; 1321 1322 conn = hci_connection_for_handle(handle); 1323 if (!conn){ 1324 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1325 continue; 1326 } 1327 1328 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1329 if (conn->num_sco_packets_sent >= num_packets){ 1330 conn->num_sco_packets_sent -= num_packets; 1331 } else { 1332 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1333 conn->num_sco_packets_sent = 0; 1334 } 1335 1336 } else { 1337 if (conn->num_acl_packets_sent >= num_packets){ 1338 conn->num_acl_packets_sent -= num_packets; 1339 } else { 1340 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1341 conn->num_acl_packets_sent = 0; 1342 } 1343 } 1344 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1345 } 1346 break; 1347 } 1348 case HCI_EVENT_CONNECTION_REQUEST: 1349 bt_flip_addr(addr, &packet[2]); 1350 // TODO: eval COD 8-10 1351 link_type = packet[11]; 1352 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1353 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1354 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1355 if (!conn) { 1356 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1357 } 1358 if (!conn) { 1359 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1360 hci_stack->decline_reason = 0x0d; 1361 BD_ADDR_COPY(hci_stack->decline_addr, addr); 1362 break; 1363 } 1364 conn->role = HCI_ROLE_SLAVE; 1365 conn->state = RECEIVED_CONNECTION_REQUEST; 1366 // store info about eSCO 1367 if (link_type == 0x02){ 1368 conn->remote_supported_feature_eSCO = 1; 1369 } 1370 hci_run(); 1371 break; 1372 1373 case HCI_EVENT_CONNECTION_COMPLETE: 1374 // Connection management 1375 bt_flip_addr(addr, &packet[5]); 1376 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1377 addr_type = BD_ADDR_TYPE_CLASSIC; 1378 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1379 if (conn) { 1380 if (!packet[2]){ 1381 conn->state = OPEN; 1382 conn->con_handle = READ_BT_16(packet, 3); 1383 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1384 1385 // restart timer 1386 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1387 run_loop_add_timer(&conn->timeout); 1388 1389 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1390 1391 hci_emit_nr_connections_changed(); 1392 } else { 1393 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1394 uint8_t status = packet[2]; 1395 bd_addr_t bd_address; 1396 memcpy(&bd_address, conn->address, 6); 1397 1398 // connection failed, remove entry 1399 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1400 btstack_memory_hci_connection_free( conn ); 1401 1402 // notify client if dedicated bonding 1403 if (notify_dedicated_bonding_failed){ 1404 log_info("hci notify_dedicated_bonding_failed"); 1405 hci_emit_dedicated_bonding_result(bd_address, status); 1406 } 1407 1408 // if authentication error, also delete link key 1409 if (packet[2] == 0x05) { 1410 hci_drop_link_key_for_bd_addr(addr); 1411 } 1412 } 1413 } 1414 break; 1415 1416 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1417 bt_flip_addr(addr, &packet[5]); 1418 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1419 if (packet[2]){ 1420 // connection failed 1421 break; 1422 } 1423 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1424 if (!conn) { 1425 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1426 } 1427 if (!conn) { 1428 break; 1429 } 1430 conn->state = OPEN; 1431 conn->con_handle = READ_BT_16(packet, 3); 1432 break; 1433 1434 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1435 handle = READ_BT_16(packet, 3); 1436 conn = hci_connection_for_handle(handle); 1437 if (!conn) break; 1438 if (!packet[2]){ 1439 uint8_t * features = &packet[5]; 1440 if (features[6] & (1 << 3)){ 1441 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1442 } 1443 if (features[3] & (1<<7)){ 1444 conn->remote_supported_feature_eSCO = 1; 1445 } 1446 } 1447 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1448 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1449 if (conn->bonding_flags & BONDING_DEDICATED){ 1450 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1451 } 1452 break; 1453 1454 case HCI_EVENT_LINK_KEY_REQUEST: 1455 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1456 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1457 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1458 if (hci_stack->bondable && !hci_stack->remote_device_db) break; 1459 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1460 hci_run(); 1461 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1462 return; 1463 1464 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1465 bt_flip_addr(addr, &packet[2]); 1466 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1467 if (!conn) break; 1468 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1469 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1470 // Change Connection Encryption keeps link key type 1471 if (link_key_type != CHANGED_COMBINATION_KEY){ 1472 conn->link_key_type = link_key_type; 1473 } 1474 if (!hci_stack->remote_device_db) break; 1475 hci_stack->remote_device_db->put_link_key(addr, &packet[8], conn->link_key_type); 1476 // still forward event to allow dismiss of pairing dialog 1477 break; 1478 } 1479 1480 case HCI_EVENT_PIN_CODE_REQUEST: 1481 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1482 // non-bondable mode: pin code negative reply will be sent 1483 if (!hci_stack->bondable){ 1484 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1485 hci_run(); 1486 return; 1487 } 1488 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1489 if (!hci_stack->remote_device_db) break; 1490 bt_flip_addr(addr, &packet[2]); 1491 hci_stack->remote_device_db->delete_link_key(addr); 1492 break; 1493 1494 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1495 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1496 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1497 break; 1498 1499 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1500 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1501 if (!hci_stack->ssp_auto_accept) break; 1502 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1503 break; 1504 1505 case HCI_EVENT_USER_PASSKEY_REQUEST: 1506 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1507 if (!hci_stack->ssp_auto_accept) break; 1508 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1509 break; 1510 1511 case HCI_EVENT_ENCRYPTION_CHANGE: 1512 handle = READ_BT_16(packet, 3); 1513 conn = hci_connection_for_handle(handle); 1514 if (!conn) break; 1515 if (packet[2] == 0) { 1516 if (packet[5]){ 1517 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1518 } else { 1519 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1520 } 1521 } 1522 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1523 break; 1524 1525 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1526 handle = READ_BT_16(packet, 3); 1527 conn = hci_connection_for_handle(handle); 1528 if (!conn) break; 1529 1530 // dedicated bonding: send result and disconnect 1531 if (conn->bonding_flags & BONDING_DEDICATED){ 1532 conn->bonding_flags &= ~BONDING_DEDICATED; 1533 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1534 conn->bonding_status = packet[2]; 1535 break; 1536 } 1537 1538 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1539 // link key sufficient for requested security 1540 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1541 break; 1542 } 1543 // not enough 1544 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1545 break; 1546 1547 #ifndef EMBEDDED 1548 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1549 if (!hci_stack->remote_device_db) break; 1550 if (packet[2]) break; // status not ok 1551 bt_flip_addr(addr, &packet[3]); 1552 // fix for invalid remote names - terminate on 0xff 1553 for (i=0; i<248;i++){ 1554 if (packet[9+i] == 0xff){ 1555 packet[9+i] = 0; 1556 break; 1557 } 1558 } 1559 memset(&device_name, 0, sizeof(device_name_t)); 1560 strncpy((char*) device_name, (char*) &packet[9], 248); 1561 hci_stack->remote_device_db->put_name(addr, &device_name); 1562 break; 1563 1564 case HCI_EVENT_INQUIRY_RESULT: 1565 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI:{ 1566 if (!hci_stack->remote_device_db) break; 1567 // first send inq result packet 1568 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1569 // then send cached remote names 1570 int offset = 3; 1571 for (i=0; i<packet[2];i++){ 1572 bt_flip_addr(addr, &packet[offset]); 1573 offset += 14; // 6 + 1 + 1 + 1 + 3 + 2; 1574 if (hci_stack->remote_device_db->get_name(addr, &device_name)){ 1575 hci_emit_remote_name_cached(addr, &device_name); 1576 } 1577 } 1578 return; 1579 } 1580 #endif 1581 1582 // HCI_EVENT_DISCONNECTION_COMPLETE 1583 // has been split, to first notify stack before shutting connection down 1584 // see end of function, too. 1585 case HCI_EVENT_DISCONNECTION_COMPLETE: 1586 if (packet[2]) break; // status != 0 1587 handle = READ_BT_16(packet, 3); 1588 conn = hci_connection_for_handle(handle); 1589 if (!conn) break; // no conn struct anymore 1590 // re-enable advertisements for le connections if active 1591 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1592 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1593 } 1594 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1595 break; 1596 1597 case HCI_EVENT_HARDWARE_ERROR: 1598 if (hci_stack->hardware_error_callback){ 1599 (*hci_stack->hardware_error_callback)(); 1600 } else if(hci_stack->control && hci_stack->control->hw_error){ 1601 (*hci_stack->control->hw_error)(); 1602 } else { 1603 // if no special requests, just reboot stack 1604 hci_power_control_off(); 1605 hci_power_control_on(); 1606 } 1607 break; 1608 1609 case HCI_EVENT_ROLE_CHANGE: 1610 if (packet[2]) break; // status != 0 1611 handle = READ_BT_16(packet, 3); 1612 conn = hci_connection_for_handle(handle); 1613 if (!conn) break; // no conn 1614 conn->role = packet[9]; 1615 break; 1616 1617 case DAEMON_EVENT_HCI_PACKET_SENT: 1618 // release packet buffer only for asynchronous transport and if there are not further fragements 1619 if (hci_transport_synchronous()) { 1620 log_error("Synchronous HCI Transport shouldn't send DAEMON_EVENT_HCI_PACKET_SENT"); 1621 return; // instead of break: to avoid re-entering hci_run() 1622 } 1623 if (hci_stack->acl_fragmentation_total_size) break; 1624 hci_release_packet_buffer(); 1625 break; 1626 1627 #ifdef HAVE_BLE 1628 case HCI_EVENT_LE_META: 1629 switch (packet[2]){ 1630 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1631 log_info("advertising report received"); 1632 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1633 le_handle_advertisement_report(packet, size); 1634 break; 1635 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1636 // Connection management 1637 bt_flip_addr(addr, &packet[8]); 1638 addr_type = (bd_addr_type_t)packet[7]; 1639 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1640 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1641 // if auto-connect, remove from whitelist in both roles 1642 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1643 hci_remove_from_whitelist(addr_type, addr); 1644 } 1645 // handle error: error is reported only to the initiator -> outgoing connection 1646 if (packet[3]){ 1647 // outgoing connection establishment is done 1648 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1649 // remove entry 1650 if (conn){ 1651 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1652 btstack_memory_hci_connection_free( conn ); 1653 } 1654 break; 1655 } 1656 // on success, both hosts receive connection complete event 1657 if (packet[6] == HCI_ROLE_MASTER){ 1658 // if we're master, it was an outgoing connection and we're done with it 1659 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1660 } else { 1661 // if we're slave, it was an incoming connection, advertisements have stopped 1662 hci_stack->le_advertisements_active = 0; 1663 } 1664 // LE connections are auto-accepted, so just create a connection if there isn't one already 1665 if (!conn){ 1666 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1667 } 1668 // no memory, sorry. 1669 if (!conn){ 1670 break; 1671 } 1672 1673 conn->state = OPEN; 1674 conn->role = packet[6]; 1675 conn->con_handle = READ_BT_16(packet, 4); 1676 1677 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1678 1679 // restart timer 1680 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1681 // run_loop_add_timer(&conn->timeout); 1682 1683 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1684 1685 hci_emit_nr_connections_changed(); 1686 break; 1687 1688 // log_info("LE buffer size: %u, count %u", READ_BT_16(packet,6), packet[8]); 1689 1690 default: 1691 break; 1692 } 1693 break; 1694 #endif 1695 default: 1696 break; 1697 } 1698 1699 // handle BT initialization 1700 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1701 hci_initializing_event_handler(packet, size); 1702 } 1703 1704 // help with BT sleep 1705 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1706 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1707 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1708 hci_initializing_next_state(); 1709 } 1710 1711 // notify upper stack 1712 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1713 1714 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1715 if (packet[0] == HCI_EVENT_DISCONNECTION_COMPLETE){ 1716 if (!packet[2]){ 1717 handle = READ_BT_16(packet, 3); 1718 hci_connection_t * aConn = hci_connection_for_handle(handle); 1719 if (aConn) { 1720 uint8_t status = aConn->bonding_status; 1721 uint16_t flags = aConn->bonding_flags; 1722 bd_addr_t bd_address; 1723 memcpy(&bd_address, aConn->address, 6); 1724 hci_shutdown_connection(aConn); 1725 // connection struct is gone, don't access anymore 1726 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1727 hci_emit_dedicated_bonding_result(bd_address, status); 1728 } 1729 } 1730 } 1731 } 1732 1733 // execute main loop 1734 hci_run(); 1735 } 1736 1737 static void sco_handler(uint8_t * packet, uint16_t size){ 1738 if (!hci_stack->sco_packet_handler) return; 1739 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, packet, size); 1740 } 1741 1742 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1743 hci_dump_packet(packet_type, 1, packet, size); 1744 switch (packet_type) { 1745 case HCI_EVENT_PACKET: 1746 event_handler(packet, size); 1747 break; 1748 case HCI_ACL_DATA_PACKET: 1749 acl_handler(packet, size); 1750 break; 1751 case HCI_SCO_DATA_PACKET: 1752 sco_handler(packet, size); 1753 default: 1754 break; 1755 } 1756 } 1757 1758 /** Register HCI packet handlers */ 1759 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1760 hci_stack->packet_handler = handler; 1761 } 1762 1763 /** 1764 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 1765 */ 1766 void hci_register_sco_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1767 hci_stack->sco_packet_handler = handler; 1768 } 1769 1770 static void hci_state_reset(void){ 1771 // no connections yet 1772 hci_stack->connections = NULL; 1773 1774 // keep discoverable/connectable as this has been requested by the client(s) 1775 // hci_stack->discoverable = 0; 1776 // hci_stack->connectable = 0; 1777 // hci_stack->bondable = 1; 1778 1779 // buffer is free 1780 hci_stack->hci_packet_buffer_reserved = 0; 1781 1782 // no pending cmds 1783 hci_stack->decline_reason = 0; 1784 hci_stack->new_scan_enable_value = 0xff; 1785 1786 // LE 1787 hci_stack->adv_addr_type = 0; 1788 memset(hci_stack->adv_address, 0, 6); 1789 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1790 hci_stack->le_scan_type = 0xff; 1791 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1792 hci_stack->le_whitelist = 0; 1793 hci_stack->le_whitelist_capacity = 0; 1794 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 1795 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 1796 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 1797 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 1798 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 1799 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 1800 } 1801 1802 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 1803 1804 #ifdef HAVE_MALLOC 1805 if (!hci_stack) { 1806 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1807 } 1808 #else 1809 hci_stack = &hci_stack_static; 1810 #endif 1811 memset(hci_stack, 0, sizeof(hci_stack_t)); 1812 1813 // reference to use transport layer implementation 1814 hci_stack->hci_transport = transport; 1815 1816 // references to used control implementation 1817 hci_stack->control = control; 1818 1819 // reference to used config 1820 hci_stack->config = config; 1821 1822 // higher level handler 1823 hci_stack->packet_handler = dummy_handler; 1824 1825 // store and open remote device db 1826 hci_stack->remote_device_db = remote_device_db; 1827 if (hci_stack->remote_device_db) { 1828 hci_stack->remote_device_db->open(); 1829 } 1830 1831 // max acl payload size defined in config.h 1832 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1833 1834 // register packet handlers with transport 1835 transport->register_packet_handler(&packet_handler); 1836 1837 hci_stack->state = HCI_STATE_OFF; 1838 1839 // class of device 1840 hci_stack->class_of_device = 0x007a020c; // Smartphone 1841 1842 // bondable by default 1843 hci_stack->bondable = 1; 1844 1845 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1846 hci_stack->ssp_enable = 1; 1847 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1848 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1849 hci_stack->ssp_auto_accept = 1; 1850 1851 // voice setting - signed 8 bit pcm data with CVSD over the air 1852 hci_stack->sco_voice_setting = 0x40; 1853 1854 hci_state_reset(); 1855 } 1856 1857 void hci_close(void){ 1858 // close remote device db 1859 if (hci_stack->remote_device_db) { 1860 hci_stack->remote_device_db->close(); 1861 } 1862 while (hci_stack->connections) { 1863 // cancel all l2cap connections 1864 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 1865 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1866 } 1867 hci_power_control(HCI_POWER_OFF); 1868 1869 #ifdef HAVE_MALLOC 1870 free(hci_stack); 1871 #endif 1872 hci_stack = NULL; 1873 } 1874 1875 void hci_set_class_of_device(uint32_t class_of_device){ 1876 hci_stack->class_of_device = class_of_device; 1877 } 1878 1879 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 1880 void hci_set_bd_addr(bd_addr_t addr){ 1881 memcpy(hci_stack->custom_bd_addr, addr, 6); 1882 hci_stack->custom_bd_addr_set = 1; 1883 } 1884 1885 void hci_disable_l2cap_timeout_check(void){ 1886 disable_l2cap_timeouts = 1; 1887 } 1888 // State-Module-Driver overview 1889 // state module low-level 1890 // HCI_STATE_OFF off close 1891 // HCI_STATE_INITIALIZING, on open 1892 // HCI_STATE_WORKING, on open 1893 // HCI_STATE_HALTING, on open 1894 // HCI_STATE_SLEEPING, off/sleep close 1895 // HCI_STATE_FALLING_ASLEEP on open 1896 1897 static int hci_power_control_on(void){ 1898 1899 // power on 1900 int err = 0; 1901 if (hci_stack->control && hci_stack->control->on){ 1902 err = (*hci_stack->control->on)(hci_stack->config); 1903 } 1904 if (err){ 1905 log_error( "POWER_ON failed"); 1906 hci_emit_hci_open_failed(); 1907 return err; 1908 } 1909 1910 // open low-level device 1911 err = hci_stack->hci_transport->open(hci_stack->config); 1912 if (err){ 1913 log_error( "HCI_INIT failed, turning Bluetooth off again"); 1914 if (hci_stack->control && hci_stack->control->off){ 1915 (*hci_stack->control->off)(hci_stack->config); 1916 } 1917 hci_emit_hci_open_failed(); 1918 return err; 1919 } 1920 return 0; 1921 } 1922 1923 static void hci_power_control_off(void){ 1924 1925 log_info("hci_power_control_off"); 1926 1927 // close low-level device 1928 hci_stack->hci_transport->close(hci_stack->config); 1929 1930 log_info("hci_power_control_off - hci_transport closed"); 1931 1932 // power off 1933 if (hci_stack->control && hci_stack->control->off){ 1934 (*hci_stack->control->off)(hci_stack->config); 1935 } 1936 1937 log_info("hci_power_control_off - control closed"); 1938 1939 hci_stack->state = HCI_STATE_OFF; 1940 } 1941 1942 static void hci_power_control_sleep(void){ 1943 1944 log_info("hci_power_control_sleep"); 1945 1946 #if 0 1947 // don't close serial port during sleep 1948 1949 // close low-level device 1950 hci_stack->hci_transport->close(hci_stack->config); 1951 #endif 1952 1953 // sleep mode 1954 if (hci_stack->control && hci_stack->control->sleep){ 1955 (*hci_stack->control->sleep)(hci_stack->config); 1956 } 1957 1958 hci_stack->state = HCI_STATE_SLEEPING; 1959 } 1960 1961 static int hci_power_control_wake(void){ 1962 1963 log_info("hci_power_control_wake"); 1964 1965 // wake on 1966 if (hci_stack->control && hci_stack->control->wake){ 1967 (*hci_stack->control->wake)(hci_stack->config); 1968 } 1969 1970 #if 0 1971 // open low-level device 1972 int err = hci_stack->hci_transport->open(hci_stack->config); 1973 if (err){ 1974 log_error( "HCI_INIT failed, turning Bluetooth off again"); 1975 if (hci_stack->control && hci_stack->control->off){ 1976 (*hci_stack->control->off)(hci_stack->config); 1977 } 1978 hci_emit_hci_open_failed(); 1979 return err; 1980 } 1981 #endif 1982 1983 return 0; 1984 } 1985 1986 static void hci_power_transition_to_initializing(void){ 1987 // set up state machine 1988 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1989 hci_stack->hci_packet_buffer_reserved = 0; 1990 hci_stack->state = HCI_STATE_INITIALIZING; 1991 hci_stack->substate = HCI_INIT_SEND_RESET; 1992 } 1993 1994 int hci_power_control(HCI_POWER_MODE power_mode){ 1995 1996 log_info("hci_power_control: %u, current mode %u", power_mode, hci_stack->state); 1997 1998 int err = 0; 1999 switch (hci_stack->state){ 2000 2001 case HCI_STATE_OFF: 2002 switch (power_mode){ 2003 case HCI_POWER_ON: 2004 err = hci_power_control_on(); 2005 if (err) { 2006 log_error("hci_power_control_on() error %u", err); 2007 return err; 2008 } 2009 hci_power_transition_to_initializing(); 2010 break; 2011 case HCI_POWER_OFF: 2012 // do nothing 2013 break; 2014 case HCI_POWER_SLEEP: 2015 // do nothing (with SLEEP == OFF) 2016 break; 2017 } 2018 break; 2019 2020 case HCI_STATE_INITIALIZING: 2021 switch (power_mode){ 2022 case HCI_POWER_ON: 2023 // do nothing 2024 break; 2025 case HCI_POWER_OFF: 2026 // no connections yet, just turn it off 2027 hci_power_control_off(); 2028 break; 2029 case HCI_POWER_SLEEP: 2030 // no connections yet, just turn it off 2031 hci_power_control_sleep(); 2032 break; 2033 } 2034 break; 2035 2036 case HCI_STATE_WORKING: 2037 switch (power_mode){ 2038 case HCI_POWER_ON: 2039 // do nothing 2040 break; 2041 case HCI_POWER_OFF: 2042 // see hci_run 2043 hci_stack->state = HCI_STATE_HALTING; 2044 break; 2045 case HCI_POWER_SLEEP: 2046 // see hci_run 2047 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2048 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2049 break; 2050 } 2051 break; 2052 2053 case HCI_STATE_HALTING: 2054 switch (power_mode){ 2055 case HCI_POWER_ON: 2056 hci_power_transition_to_initializing(); 2057 break; 2058 case HCI_POWER_OFF: 2059 // do nothing 2060 break; 2061 case HCI_POWER_SLEEP: 2062 // see hci_run 2063 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2064 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2065 break; 2066 } 2067 break; 2068 2069 case HCI_STATE_FALLING_ASLEEP: 2070 switch (power_mode){ 2071 case HCI_POWER_ON: 2072 2073 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2074 // nothing to do, if H4 supports power management 2075 if (bt_control_iphone_power_management_enabled()){ 2076 hci_stack->state = HCI_STATE_INITIALIZING; 2077 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2078 break; 2079 } 2080 #endif 2081 hci_power_transition_to_initializing(); 2082 break; 2083 case HCI_POWER_OFF: 2084 // see hci_run 2085 hci_stack->state = HCI_STATE_HALTING; 2086 break; 2087 case HCI_POWER_SLEEP: 2088 // do nothing 2089 break; 2090 } 2091 break; 2092 2093 case HCI_STATE_SLEEPING: 2094 switch (power_mode){ 2095 case HCI_POWER_ON: 2096 2097 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2098 // nothing to do, if H4 supports power management 2099 if (bt_control_iphone_power_management_enabled()){ 2100 hci_stack->state = HCI_STATE_INITIALIZING; 2101 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2102 hci_update_scan_enable(); 2103 break; 2104 } 2105 #endif 2106 err = hci_power_control_wake(); 2107 if (err) return err; 2108 hci_power_transition_to_initializing(); 2109 break; 2110 case HCI_POWER_OFF: 2111 hci_stack->state = HCI_STATE_HALTING; 2112 break; 2113 case HCI_POWER_SLEEP: 2114 // do nothing 2115 break; 2116 } 2117 break; 2118 } 2119 2120 // create internal event 2121 hci_emit_state(); 2122 2123 // trigger next/first action 2124 hci_run(); 2125 2126 return 0; 2127 } 2128 2129 static void hci_update_scan_enable(void){ 2130 // 2 = page scan, 1 = inq scan 2131 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2132 hci_run(); 2133 } 2134 2135 void hci_discoverable_control(uint8_t enable){ 2136 if (enable) enable = 1; // normalize argument 2137 2138 if (hci_stack->discoverable == enable){ 2139 hci_emit_discoverable_enabled(hci_stack->discoverable); 2140 return; 2141 } 2142 2143 hci_stack->discoverable = enable; 2144 hci_update_scan_enable(); 2145 } 2146 2147 void hci_connectable_control(uint8_t enable){ 2148 if (enable) enable = 1; // normalize argument 2149 2150 // don't emit event 2151 if (hci_stack->connectable == enable) return; 2152 2153 hci_stack->connectable = enable; 2154 hci_update_scan_enable(); 2155 } 2156 2157 void hci_local_bd_addr(bd_addr_t address_buffer){ 2158 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2159 } 2160 2161 void hci_run(void){ 2162 2163 // log_info("hci_run: entered"); 2164 linked_item_t * it; 2165 2166 // send continuation fragments first, as they block the prepared packet buffer 2167 if (hci_stack->acl_fragmentation_total_size > 0) { 2168 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2169 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2170 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2171 if (connection) { 2172 hci_send_acl_packet_fragments(connection); 2173 return; 2174 } 2175 // connection gone -> discard further fragments 2176 hci_stack->acl_fragmentation_total_size = 0; 2177 hci_stack->acl_fragmentation_pos = 0; 2178 } 2179 } 2180 2181 if (!hci_can_send_command_packet_now()) return; 2182 2183 // global/non-connection oriented commands 2184 2185 // decline incoming connections 2186 if (hci_stack->decline_reason){ 2187 uint8_t reason = hci_stack->decline_reason; 2188 hci_stack->decline_reason = 0; 2189 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2190 return; 2191 } 2192 2193 // send scan enable 2194 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2195 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2196 hci_stack->new_scan_enable_value = 0xff; 2197 return; 2198 } 2199 2200 #ifdef HAVE_BLE 2201 if (hci_stack->state == HCI_STATE_WORKING){ 2202 // handle le scan 2203 switch(hci_stack->le_scanning_state){ 2204 case LE_START_SCAN: 2205 hci_stack->le_scanning_state = LE_SCANNING; 2206 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2207 return; 2208 2209 case LE_STOP_SCAN: 2210 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2211 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2212 return; 2213 default: 2214 break; 2215 } 2216 if (hci_stack->le_scan_type != 0xff){ 2217 // defaults: active scanning, accept all advertisement packets 2218 int scan_type = hci_stack->le_scan_type; 2219 hci_stack->le_scan_type = 0xff; 2220 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); 2221 return; 2222 } 2223 // le advertisement control 2224 if (hci_stack->le_advertisements_todo){ 2225 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2226 } 2227 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2228 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2229 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2230 return; 2231 } 2232 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2233 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2234 hci_send_cmd(&hci_le_set_advertising_parameters, 2235 hci_stack->le_advertisements_interval_min, 2236 hci_stack->le_advertisements_interval_max, 2237 hci_stack->le_advertisements_type, 2238 hci_stack->le_advertisements_own_address_type, 2239 hci_stack->le_advertisements_direct_address_type, 2240 hci_stack->le_advertisements_direct_address, 2241 hci_stack->le_advertisements_channel_map, 2242 hci_stack->le_advertisements_filter_policy); 2243 return; 2244 } 2245 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_DATA){ 2246 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_DATA; 2247 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2248 hci_stack->le_advertisements_data); 2249 return; 2250 } 2251 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2252 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2253 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2254 return; 2255 } 2256 2257 // 2258 // LE Whitelist Management 2259 // 2260 2261 // check if whitelist needs modification 2262 linked_list_iterator_t lit; 2263 int modification_pending = 0; 2264 linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2265 while (linked_list_iterator_has_next(&lit)){ 2266 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&lit); 2267 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2268 modification_pending = 1; 2269 break; 2270 } 2271 } 2272 2273 if (modification_pending){ 2274 // stop connnecting if modification pending 2275 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2276 hci_send_cmd(&hci_le_create_connection_cancel); 2277 return; 2278 } 2279 2280 // add/remove entries 2281 linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2282 while (linked_list_iterator_has_next(&lit)){ 2283 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&lit); 2284 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2285 entry->state = LE_WHITELIST_ON_CONTROLLER; 2286 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2287 return; 2288 2289 } 2290 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2291 bd_addr_t address; 2292 bd_addr_type_t address_type = entry->address_type; 2293 memcpy(address, entry->address, 6); 2294 linked_list_remove(&hci_stack->le_whitelist, (linked_item_t *) entry); 2295 btstack_memory_whitelist_entry_free(entry); 2296 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2297 return; 2298 } 2299 } 2300 } 2301 2302 // start connecting 2303 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2304 !linked_list_empty(&hci_stack->le_whitelist)){ 2305 bd_addr_t null_addr; 2306 memset(null_addr, 0, 6); 2307 hci_send_cmd(&hci_le_create_connection, 2308 0x0060, // scan interval: 60 ms 2309 0x0030, // scan interval: 30 ms 2310 1, // use whitelist 2311 0, // peer address type 2312 null_addr, // peer bd addr 2313 hci_stack->adv_addr_type, // our addr type: 2314 0x0008, // conn interval min 2315 0x0018, // conn interval max 2316 0, // conn latency 2317 0x0048, // supervision timeout 2318 0x0001, // min ce length 2319 0x0001 // max ce length 2320 ); 2321 return; 2322 } 2323 } 2324 #endif 2325 2326 // send pending HCI commands 2327 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 2328 hci_connection_t * connection = (hci_connection_t *) it; 2329 2330 switch(connection->state){ 2331 case SEND_CREATE_CONNECTION: 2332 switch(connection->address_type){ 2333 case BD_ADDR_TYPE_CLASSIC: 2334 log_info("sending hci_create_connection"); 2335 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2336 break; 2337 default: 2338 #ifdef HAVE_BLE 2339 log_info("sending hci_le_create_connection"); 2340 hci_send_cmd(&hci_le_create_connection, 2341 0x0060, // scan interval: 60 ms 2342 0x0030, // scan interval: 30 ms 2343 0, // don't use whitelist 2344 connection->address_type, // peer address type 2345 connection->address, // peer bd addr 2346 hci_stack->adv_addr_type, // our addr type: 2347 0x0008, // conn interval min 2348 0x0018, // conn interval max 2349 0, // conn latency 2350 0x0048, // supervision timeout 2351 0x0001, // min ce length 2352 0x0001 // max ce length 2353 ); 2354 2355 connection->state = SENT_CREATE_CONNECTION; 2356 #endif 2357 break; 2358 } 2359 return; 2360 2361 case RECEIVED_CONNECTION_REQUEST: 2362 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2363 connection->state = ACCEPTED_CONNECTION_REQUEST; 2364 connection->role = HCI_ROLE_SLAVE; 2365 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2366 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2367 } else { 2368 // remote supported feature eSCO is set if link type is eSCO 2369 uint16_t max_latency; 2370 uint8_t retransmission_effort; 2371 uint16_t packet_types; 2372 // remote supported feature eSCO is set if link type is eSCO 2373 if (connection->remote_supported_feature_eSCO){ 2374 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 2375 max_latency = 0x000c; 2376 retransmission_effort = 0x02; 2377 packet_types = 0x388; 2378 } else { 2379 // SCO: max latency, retransmission interval: N/A. any packet type 2380 max_latency = 0xffff; 2381 retransmission_effort = 0xff; 2382 packet_types = 0x003f; 2383 } 2384 hci_send_cmd(&hci_accept_synchronous_connection, connection->address, 8000, 8000, max_latency, hci_stack->sco_voice_setting, retransmission_effort, packet_types); 2385 } 2386 return; 2387 2388 #ifdef HAVE_BLE 2389 case SEND_CANCEL_CONNECTION: 2390 connection->state = SENT_CANCEL_CONNECTION; 2391 hci_send_cmd(&hci_le_create_connection_cancel); 2392 return; 2393 #endif 2394 case SEND_DISCONNECT: 2395 connection->state = SENT_DISCONNECT; 2396 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2397 return; 2398 2399 default: 2400 break; 2401 } 2402 2403 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2404 log_info("responding to link key request"); 2405 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2406 link_key_t link_key; 2407 link_key_type_t link_key_type; 2408 if ( hci_stack->remote_device_db 2409 && hci_stack->remote_device_db->get_link_key(connection->address, link_key, &link_key_type) 2410 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2411 connection->link_key_type = link_key_type; 2412 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2413 } else { 2414 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2415 } 2416 return; 2417 } 2418 2419 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2420 log_info("denying to pin request"); 2421 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2422 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2423 return; 2424 } 2425 2426 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2427 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2428 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2429 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2430 // tweak authentication requirements 2431 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2432 if (connection->bonding_flags & BONDING_DEDICATED){ 2433 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2434 } 2435 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2436 authreq |= 1; 2437 } 2438 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2439 } else { 2440 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2441 } 2442 return; 2443 } 2444 2445 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2446 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2447 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2448 return; 2449 } 2450 2451 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2452 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2453 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2454 return; 2455 } 2456 2457 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2458 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2459 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2460 return; 2461 } 2462 2463 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2464 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2465 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2466 return; 2467 } 2468 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2469 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2470 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2471 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2472 return; 2473 } 2474 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2475 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2476 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2477 return; 2478 } 2479 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2480 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2481 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2482 return; 2483 } 2484 2485 #ifdef HAVE_BLE 2486 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2487 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2488 2489 uint16_t connection_interval_min = connection->le_conn_interval_min; 2490 connection->le_conn_interval_min = 0; 2491 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2492 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2493 0x0000, 0xffff); 2494 } 2495 #endif 2496 } 2497 2498 hci_connection_t * connection; 2499 switch (hci_stack->state){ 2500 case HCI_STATE_INITIALIZING: 2501 hci_initializing_run(); 2502 break; 2503 2504 case HCI_STATE_HALTING: 2505 2506 log_info("HCI_STATE_HALTING"); 2507 2508 // free whitelist entries 2509 #ifdef HAVE_BLE 2510 { 2511 linked_list_iterator_t lit; 2512 linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2513 while (linked_list_iterator_has_next(&lit)){ 2514 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&lit); 2515 linked_list_remove(&hci_stack->le_whitelist, (linked_item_t *) entry); 2516 btstack_memory_whitelist_entry_free(entry); 2517 } 2518 } 2519 #endif 2520 // close all open connections 2521 connection = (hci_connection_t *) hci_stack->connections; 2522 if (connection){ 2523 uint16_t con_handle = (uint16_t) connection->con_handle; 2524 if (!hci_can_send_command_packet_now()) return; 2525 2526 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2527 2528 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2529 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2530 2531 // ... which would be ignored anyway as we shutdown (free) the connection now 2532 hci_shutdown_connection(connection); 2533 2534 // finally, send the disconnect command 2535 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2536 return; 2537 } 2538 log_info("HCI_STATE_HALTING, calling off"); 2539 2540 // switch mode 2541 hci_power_control_off(); 2542 2543 log_info("HCI_STATE_HALTING, emitting state"); 2544 hci_emit_state(); 2545 log_info("HCI_STATE_HALTING, done"); 2546 break; 2547 2548 case HCI_STATE_FALLING_ASLEEP: 2549 switch(hci_stack->substate) { 2550 case HCI_FALLING_ASLEEP_DISCONNECT: 2551 log_info("HCI_STATE_FALLING_ASLEEP"); 2552 // close all open connections 2553 connection = (hci_connection_t *) hci_stack->connections; 2554 2555 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2556 // don't close connections, if H4 supports power management 2557 if (bt_control_iphone_power_management_enabled()){ 2558 connection = NULL; 2559 } 2560 #endif 2561 if (connection){ 2562 2563 // send disconnect 2564 if (!hci_can_send_command_packet_now()) return; 2565 2566 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2567 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2568 2569 // send disconnected event right away - causes higher layer connections to get closed, too. 2570 hci_shutdown_connection(connection); 2571 return; 2572 } 2573 2574 if (hci_classic_supported()){ 2575 // disable page and inquiry scan 2576 if (!hci_can_send_command_packet_now()) return; 2577 2578 log_info("HCI_STATE_HALTING, disabling inq scans"); 2579 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2580 2581 // continue in next sub state 2582 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2583 break; 2584 } 2585 // fall through for ble-only chips 2586 2587 case HCI_FALLING_ASLEEP_COMPLETE: 2588 log_info("HCI_STATE_HALTING, calling sleep"); 2589 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2590 // don't actually go to sleep, if H4 supports power management 2591 if (bt_control_iphone_power_management_enabled()){ 2592 // SLEEP MODE reached 2593 hci_stack->state = HCI_STATE_SLEEPING; 2594 hci_emit_state(); 2595 break; 2596 } 2597 #endif 2598 // switch mode 2599 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2600 hci_emit_state(); 2601 break; 2602 2603 default: 2604 break; 2605 } 2606 break; 2607 2608 default: 2609 break; 2610 } 2611 } 2612 2613 int hci_send_cmd_packet(uint8_t *packet, int size){ 2614 bd_addr_t addr; 2615 hci_connection_t * conn; 2616 // house-keeping 2617 2618 // create_connection? 2619 if (IS_COMMAND(packet, hci_create_connection)){ 2620 bt_flip_addr(addr, &packet[3]); 2621 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2622 2623 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2624 if (!conn){ 2625 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2626 if (!conn){ 2627 // notify client that alloc failed 2628 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2629 return 0; // don't sent packet to controller 2630 } 2631 conn->state = SEND_CREATE_CONNECTION; 2632 } 2633 log_info("conn state %u", conn->state); 2634 switch (conn->state){ 2635 // if connection active exists 2636 case OPEN: 2637 // and OPEN, emit connection complete command, don't send to controller 2638 hci_emit_connection_complete(conn, 0); 2639 return 0; 2640 case SEND_CREATE_CONNECTION: 2641 // connection created by hci, e.g. dedicated bonding 2642 break; 2643 default: 2644 // otherwise, just ignore as it is already in the open process 2645 return 0; 2646 } 2647 conn->state = SENT_CREATE_CONNECTION; 2648 } 2649 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2650 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2651 } 2652 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2653 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2654 } 2655 2656 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2657 if (hci_stack->remote_device_db){ 2658 bt_flip_addr(addr, &packet[3]); 2659 hci_stack->remote_device_db->delete_link_key(addr); 2660 } 2661 } 2662 2663 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2664 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2665 bt_flip_addr(addr, &packet[3]); 2666 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2667 if (conn){ 2668 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2669 } 2670 } 2671 2672 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2673 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2674 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2675 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2676 bt_flip_addr(addr, &packet[3]); 2677 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2678 if (conn){ 2679 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2680 } 2681 } 2682 2683 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2684 hci_stack->loopback_mode = packet[3]; 2685 } 2686 2687 #ifdef HAVE_BLE 2688 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2689 hci_stack->adv_addr_type = packet[8]; 2690 } 2691 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2692 bt_flip_addr(hci_stack->adv_address, &packet[3]); 2693 } 2694 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 2695 hci_stack->le_advertisements_active = packet[3]; 2696 } 2697 if (IS_COMMAND(packet, hci_le_create_connection)){ 2698 // white list used? 2699 uint8_t initiator_filter_policy = packet[7]; 2700 switch (initiator_filter_policy){ 2701 case 0: 2702 // whitelist not used 2703 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 2704 break; 2705 case 1: 2706 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 2707 break; 2708 default: 2709 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 2710 break; 2711 } 2712 } 2713 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 2714 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2715 } 2716 #endif 2717 2718 hci_stack->num_cmd_packets--; 2719 2720 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2721 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2722 2723 // release packet buffer for synchronous transport implementations 2724 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 2725 hci_stack->hci_packet_buffer_reserved = 0; 2726 } 2727 2728 return err; 2729 } 2730 2731 // disconnect because of security block 2732 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 2733 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2734 if (!connection) return; 2735 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2736 } 2737 2738 2739 // Configure Secure Simple Pairing 2740 2741 // enable will enable SSP during init 2742 void hci_ssp_set_enable(int enable){ 2743 hci_stack->ssp_enable = enable; 2744 } 2745 2746 int hci_local_ssp_activated(void){ 2747 return hci_ssp_supported() && hci_stack->ssp_enable; 2748 } 2749 2750 // if set, BTstack will respond to io capability request using authentication requirement 2751 void hci_ssp_set_io_capability(int io_capability){ 2752 hci_stack->ssp_io_capability = io_capability; 2753 } 2754 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 2755 hci_stack->ssp_authentication_requirement = authentication_requirement; 2756 } 2757 2758 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 2759 void hci_ssp_set_auto_accept(int auto_accept){ 2760 hci_stack->ssp_auto_accept = auto_accept; 2761 } 2762 2763 /** 2764 * pre: numcmds >= 0 - it's allowed to send a command to the controller 2765 */ 2766 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 2767 2768 if (!hci_can_send_command_packet_now()){ 2769 log_error("hci_send_cmd called but cannot send packet now"); 2770 return 0; 2771 } 2772 2773 // for HCI INITIALIZATION 2774 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 2775 hci_stack->last_cmd_opcode = cmd->opcode; 2776 2777 hci_reserve_packet_buffer(); 2778 uint8_t * packet = hci_stack->hci_packet_buffer; 2779 2780 va_list argptr; 2781 va_start(argptr, cmd); 2782 uint16_t size = hci_create_cmd_internal(packet, cmd, argptr); 2783 va_end(argptr); 2784 2785 return hci_send_cmd_packet(packet, size); 2786 } 2787 2788 // Create various non-HCI events. 2789 // TODO: generalize, use table similar to hci_create_command 2790 2791 void hci_emit_state(void){ 2792 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 2793 uint8_t event[3]; 2794 event[0] = BTSTACK_EVENT_STATE; 2795 event[1] = sizeof(event) - 2; 2796 event[2] = hci_stack->state; 2797 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2798 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2799 } 2800 2801 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 2802 uint8_t event[13]; 2803 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 2804 event[1] = sizeof(event) - 2; 2805 event[2] = status; 2806 bt_store_16(event, 3, conn->con_handle); 2807 bt_flip_addr(&event[5], conn->address); 2808 event[11] = 1; // ACL connection 2809 event[12] = 0; // encryption disabled 2810 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2811 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2812 } 2813 2814 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, uint16_t conn_handle, uint8_t status){ 2815 uint8_t event[21]; 2816 event[0] = HCI_EVENT_LE_META; 2817 event[1] = sizeof(event) - 2; 2818 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 2819 event[3] = status; 2820 bt_store_16(event, 4, conn_handle); 2821 event[6] = 0; // TODO: role 2822 event[7] = address_type; 2823 bt_flip_addr(&event[8], address); 2824 bt_store_16(event, 14, 0); // interval 2825 bt_store_16(event, 16, 0); // latency 2826 bt_store_16(event, 18, 0); // supervision timeout 2827 event[20] = 0; // master clock accuracy 2828 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2829 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2830 } 2831 2832 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 2833 uint8_t event[6]; 2834 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 2835 event[1] = sizeof(event) - 2; 2836 event[2] = 0; // status = OK 2837 bt_store_16(event, 3, handle); 2838 event[5] = reason; 2839 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2840 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2841 } 2842 2843 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 2844 if (disable_l2cap_timeouts) return; 2845 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 2846 uint8_t event[4]; 2847 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 2848 event[1] = sizeof(event) - 2; 2849 bt_store_16(event, 2, conn->con_handle); 2850 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2851 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2852 } 2853 2854 void hci_emit_nr_connections_changed(void){ 2855 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 2856 uint8_t event[3]; 2857 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 2858 event[1] = sizeof(event) - 2; 2859 event[2] = nr_hci_connections(); 2860 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2861 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2862 } 2863 2864 void hci_emit_hci_open_failed(void){ 2865 log_info("BTSTACK_EVENT_POWERON_FAILED"); 2866 uint8_t event[2]; 2867 event[0] = BTSTACK_EVENT_POWERON_FAILED; 2868 event[1] = sizeof(event) - 2; 2869 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2870 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2871 } 2872 2873 #ifndef EMBEDDED 2874 void hci_emit_btstack_version(void){ 2875 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 2876 uint8_t event[6]; 2877 event[0] = BTSTACK_EVENT_VERSION; 2878 event[1] = sizeof(event) - 2; 2879 event[2] = BTSTACK_MAJOR; 2880 event[3] = BTSTACK_MINOR; 2881 bt_store_16(event, 4, 3257); // last SVN commit on Google Code + 1 2882 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2883 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2884 } 2885 #endif 2886 2887 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 2888 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 2889 uint8_t event[3]; 2890 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 2891 event[1] = sizeof(event) - 2; 2892 event[2] = enabled; 2893 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2894 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2895 } 2896 2897 void hci_emit_remote_name_cached(bd_addr_t addr, device_name_t *name){ 2898 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 2899 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 2900 event[1] = sizeof(event) - 2 - 1; 2901 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 2902 bt_flip_addr(&event[3], addr); 2903 memcpy(&event[9], name, 248); 2904 2905 event[9+248] = 0; // assert \0 for log_info 2906 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(addr), &event[9]); 2907 2908 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 2909 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 2910 } 2911 2912 void hci_emit_discoverable_enabled(uint8_t enabled){ 2913 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 2914 uint8_t event[3]; 2915 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 2916 event[1] = sizeof(event) - 2; 2917 event[2] = enabled; 2918 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2919 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2920 } 2921 2922 void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 2923 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 2924 uint8_t event[5]; 2925 int pos = 0; 2926 event[pos++] = GAP_SECURITY_LEVEL; 2927 event[pos++] = sizeof(event) - 2; 2928 bt_store_16(event, 2, con_handle); 2929 pos += 2; 2930 event[pos++] = level; 2931 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2932 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2933 } 2934 2935 void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 2936 log_info("hci_emit_dedicated_bonding_result %u ", status); 2937 uint8_t event[9]; 2938 int pos = 0; 2939 event[pos++] = GAP_DEDICATED_BONDING_COMPLETED; 2940 event[pos++] = sizeof(event) - 2; 2941 event[pos++] = status; 2942 bt_flip_addr( &event[pos], address); 2943 pos += 6; 2944 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2945 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2946 } 2947 2948 // query if remote side supports eSCO 2949 int hci_remote_eSCO_supported(hci_con_handle_t con_handle){ 2950 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2951 if (!connection) return 0; 2952 return connection->remote_supported_feature_eSCO; 2953 } 2954 2955 // query if remote side supports SSP 2956 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 2957 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2958 if (!connection) return 0; 2959 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 2960 } 2961 2962 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 2963 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 2964 } 2965 2966 // GAP API 2967 /** 2968 * @bbrief enable/disable bonding. default is enabled 2969 * @praram enabled 2970 */ 2971 void gap_set_bondable_mode(int enable){ 2972 hci_stack->bondable = enable ? 1 : 0; 2973 } 2974 /** 2975 * @brief Get bondable mode. 2976 * @return 1 if bondable 2977 */ 2978 int gap_get_bondable_mode(void){ 2979 return hci_stack->bondable; 2980 } 2981 2982 /** 2983 * @brief map link keys to security levels 2984 */ 2985 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 2986 switch (link_key_type){ 2987 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 2988 return LEVEL_4; 2989 case COMBINATION_KEY: 2990 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 2991 return LEVEL_3; 2992 default: 2993 return LEVEL_2; 2994 } 2995 } 2996 2997 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 2998 if (!connection) return LEVEL_0; 2999 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3000 return gap_security_level_for_link_key_type(connection->link_key_type); 3001 } 3002 3003 3004 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3005 log_info("gap_mitm_protection_required_for_security_level %u", level); 3006 return level > LEVEL_2; 3007 } 3008 3009 /** 3010 * @brief get current security level 3011 */ 3012 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3013 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3014 if (!connection) return LEVEL_0; 3015 return gap_security_level_for_connection(connection); 3016 } 3017 3018 /** 3019 * @brief request connection to device to 3020 * @result GAP_AUTHENTICATION_RESULT 3021 */ 3022 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3023 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3024 if (!connection){ 3025 hci_emit_security_level(con_handle, LEVEL_0); 3026 return; 3027 } 3028 gap_security_level_t current_level = gap_security_level(con_handle); 3029 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3030 if (current_level >= requested_level){ 3031 hci_emit_security_level(con_handle, current_level); 3032 return; 3033 } 3034 3035 connection->requested_security_level = requested_level; 3036 3037 #if 0 3038 // sending encryption request without a link key results in an error. 3039 // TODO: figure out how to use it properly 3040 3041 // would enabling ecnryption suffice (>= LEVEL_2)? 3042 if (hci_stack->remote_device_db){ 3043 link_key_type_t link_key_type; 3044 link_key_t link_key; 3045 if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3046 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3047 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3048 return; 3049 } 3050 } 3051 } 3052 #endif 3053 3054 // try to authenticate connection 3055 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3056 hci_run(); 3057 } 3058 3059 /** 3060 * @brief start dedicated bonding with device. disconnect after bonding 3061 * @param device 3062 * @param request MITM protection 3063 * @result GAP_DEDICATED_BONDING_COMPLETE 3064 */ 3065 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3066 3067 // create connection state machine 3068 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3069 3070 if (!connection){ 3071 return BTSTACK_MEMORY_ALLOC_FAILED; 3072 } 3073 3074 // delete linkn key 3075 hci_drop_link_key_for_bd_addr(device); 3076 3077 // configure LEVEL_2/3, dedicated bonding 3078 connection->state = SEND_CREATE_CONNECTION; 3079 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3080 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 3081 connection->bonding_flags = BONDING_DEDICATED; 3082 3083 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3084 3085 // handle: connnection failure (connection complete != ok) 3086 // handle: authentication failure 3087 // handle: disconnect on done 3088 3089 hci_run(); 3090 3091 return 0; 3092 } 3093 3094 void gap_set_local_name(const char * local_name){ 3095 hci_stack->local_name = local_name; 3096 } 3097 3098 le_command_status_t le_central_start_scan(void){ 3099 if (hci_stack->le_scanning_state == LE_SCANNING) return BLE_PERIPHERAL_OK; 3100 hci_stack->le_scanning_state = LE_START_SCAN; 3101 hci_run(); 3102 return BLE_PERIPHERAL_OK; 3103 } 3104 3105 le_command_status_t le_central_stop_scan(void){ 3106 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return BLE_PERIPHERAL_OK; 3107 hci_stack->le_scanning_state = LE_STOP_SCAN; 3108 hci_run(); 3109 return BLE_PERIPHERAL_OK; 3110 } 3111 3112 void le_central_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3113 hci_stack->le_scan_type = scan_type; 3114 hci_stack->le_scan_interval = scan_interval; 3115 hci_stack->le_scan_window = scan_window; 3116 hci_run(); 3117 } 3118 3119 le_command_status_t le_central_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3120 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3121 if (!conn){ 3122 log_info("le_central_connect: no connection exists yet, creating context"); 3123 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3124 if (!conn){ 3125 // notify client that alloc failed 3126 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3127 log_info("le_central_connect: failed to alloc hci_connection_t"); 3128 return BLE_PERIPHERAL_NOT_CONNECTED; // don't sent packet to controller 3129 } 3130 conn->state = SEND_CREATE_CONNECTION; 3131 log_info("le_central_connect: send create connection next"); 3132 hci_run(); 3133 return BLE_PERIPHERAL_OK; 3134 } 3135 3136 if (!hci_is_le_connection(conn) || 3137 conn->state == SEND_CREATE_CONNECTION || 3138 conn->state == SENT_CREATE_CONNECTION) { 3139 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3140 log_error("le_central_connect: classic connection or connect is already being created"); 3141 return BLE_PERIPHERAL_IN_WRONG_STATE; 3142 } 3143 3144 log_info("le_central_connect: context exists with state %u", conn->state); 3145 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3146 hci_run(); 3147 return BLE_PERIPHERAL_OK; 3148 } 3149 3150 // @assumption: only a single outgoing LE Connection exists 3151 static hci_connection_t * le_central_get_outgoing_connection(void){ 3152 linked_item_t *it; 3153 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 3154 hci_connection_t * conn = (hci_connection_t *) it; 3155 if (!hci_is_le_connection(conn)) continue; 3156 switch (conn->state){ 3157 case SEND_CREATE_CONNECTION: 3158 case SENT_CREATE_CONNECTION: 3159 return conn; 3160 default: 3161 break; 3162 }; 3163 } 3164 return NULL; 3165 } 3166 3167 le_command_status_t le_central_connect_cancel(void){ 3168 hci_connection_t * conn = le_central_get_outgoing_connection(); 3169 if (!conn) return BLE_PERIPHERAL_OK; 3170 switch (conn->state){ 3171 case SEND_CREATE_CONNECTION: 3172 // skip sending create connection and emit event instead 3173 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3174 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 3175 btstack_memory_hci_connection_free( conn ); 3176 break; 3177 case SENT_CREATE_CONNECTION: 3178 // request to send cancel connection 3179 conn->state = SEND_CANCEL_CONNECTION; 3180 hci_run(); 3181 break; 3182 default: 3183 break; 3184 } 3185 return BLE_PERIPHERAL_OK; 3186 } 3187 3188 /** 3189 * @brief Updates the connection parameters for a given LE connection 3190 * @param handle 3191 * @param conn_interval_min (unit: 1.25ms) 3192 * @param conn_interval_max (unit: 1.25ms) 3193 * @param conn_latency 3194 * @param supervision_timeout (unit: 10ms) 3195 * @returns 0 if ok 3196 */ 3197 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3198 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3199 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3200 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3201 connection->le_conn_interval_min = conn_interval_min; 3202 connection->le_conn_interval_max = conn_interval_max; 3203 connection->le_conn_latency = conn_latency; 3204 connection->le_supervision_timeout = supervision_timeout; 3205 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3206 hci_run(); 3207 return 0; 3208 } 3209 3210 /** 3211 * @brief Request an update of the connection parameter for a given LE connection 3212 * @param handle 3213 * @param conn_interval_min (unit: 1.25ms) 3214 * @param conn_interval_max (unit: 1.25ms) 3215 * @param conn_latency 3216 * @param supervision_timeout (unit: 10ms) 3217 * @returns 0 if ok 3218 */ 3219 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3220 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3221 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3222 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3223 connection->le_conn_interval_min = conn_interval_min; 3224 connection->le_conn_interval_max = conn_interval_max; 3225 connection->le_conn_latency = conn_latency; 3226 connection->le_supervision_timeout = supervision_timeout; 3227 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3228 hci_run(); 3229 return 0; 3230 } 3231 3232 /** 3233 * @brief Set Advertisement Data 3234 * @param advertising_data_length 3235 * @param advertising_data (max 31 octets) 3236 * @note data is not copied, pointer has to stay valid 3237 */ 3238 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3239 hci_stack->le_advertisements_data_len = advertising_data_length; 3240 hci_stack->le_advertisements_data = advertising_data; 3241 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_DATA; 3242 // disable advertisements before setting data 3243 if (hci_stack->le_advertisements_active){ 3244 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3245 } 3246 hci_run(); 3247 } 3248 3249 /** 3250 * @brief Set Advertisement Parameters 3251 * @param adv_int_min 3252 * @param adv_int_max 3253 * @param adv_type 3254 * @param own_address_type 3255 * @param direct_address_type 3256 * @param direct_address 3257 * @param channel_map 3258 * @param filter_policy 3259 * 3260 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3261 */ 3262 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3263 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3264 uint8_t channel_map, uint8_t filter_policy) { 3265 3266 hci_stack->le_advertisements_interval_min = adv_int_min; 3267 hci_stack->le_advertisements_interval_max = adv_int_max; 3268 hci_stack->le_advertisements_type = adv_type; 3269 hci_stack->le_advertisements_own_address_type = own_address_type; 3270 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3271 hci_stack->le_advertisements_channel_map = channel_map; 3272 hci_stack->le_advertisements_filter_policy = filter_policy; 3273 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3274 3275 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3276 // disable advertisements before changing params 3277 if (hci_stack->le_advertisements_active){ 3278 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3279 } 3280 hci_run(); 3281 } 3282 3283 /** 3284 * @brief Enable/Disable Advertisements 3285 * @param enabled 3286 */ 3287 void gap_advertisements_enable(int enabled){ 3288 hci_stack->le_advertisements_enabled = enabled; 3289 if (enabled && !hci_stack->le_advertisements_active){ 3290 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3291 } 3292 if (!enabled && hci_stack->le_advertisements_active){ 3293 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3294 } 3295 hci_run(); 3296 } 3297 3298 3299 le_command_status_t gap_disconnect(hci_con_handle_t handle){ 3300 hci_connection_t * conn = hci_connection_for_handle(handle); 3301 if (!conn){ 3302 hci_emit_disconnection_complete(handle, 0); 3303 return BLE_PERIPHERAL_OK; 3304 } 3305 conn->state = SEND_DISCONNECT; 3306 hci_run(); 3307 return BLE_PERIPHERAL_OK; 3308 } 3309 3310 /** 3311 * @brief Get connection type 3312 * @param con_handle 3313 * @result connection_type 3314 */ 3315 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3316 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3317 if (!conn) return GAP_CONNECTION_INVALID; 3318 switch (conn->address_type){ 3319 case BD_ADDR_TYPE_LE_PUBLIC: 3320 case BD_ADDR_TYPE_LE_RANDOM: 3321 return GAP_CONNECTION_LE; 3322 case BD_ADDR_TYPE_SCO: 3323 return GAP_CONNECTION_SCO; 3324 case BD_ADDR_TYPE_CLASSIC: 3325 return GAP_CONNECTION_ACL; 3326 default: 3327 return GAP_CONNECTION_INVALID; 3328 } 3329 } 3330 3331 #ifdef HAVE_BLE 3332 3333 /** 3334 * @brief Auto Connection Establishment - Start Connecting to device 3335 * @param address_typ 3336 * @param address 3337 * @returns 0 if ok 3338 */ 3339 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3340 // check capacity 3341 int num_entries = linked_list_count(&hci_stack->le_whitelist); 3342 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3343 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3344 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3345 entry->address_type = address_type; 3346 memcpy(entry->address, address, 6); 3347 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3348 linked_list_add(&hci_stack->le_whitelist, (linked_item_t*) entry); 3349 hci_run(); 3350 return 0; 3351 } 3352 3353 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3354 linked_list_iterator_t it; 3355 linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3356 while (linked_list_iterator_has_next(&it)){ 3357 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&it); 3358 if (entry->address_type != address_type) continue; 3359 if (memcmp(entry->address, address, 6) != 0) continue; 3360 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3361 // remove from controller if already present 3362 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3363 continue; 3364 } 3365 // direclty remove entry from whitelist 3366 linked_list_iterator_remove(&it); 3367 btstack_memory_whitelist_entry_free(entry); 3368 } 3369 } 3370 3371 /** 3372 * @brief Auto Connection Establishment - Stop Connecting to device 3373 * @param address_typ 3374 * @param address 3375 * @returns 0 if ok 3376 */ 3377 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3378 hci_remove_from_whitelist(address_type, address); 3379 hci_run(); 3380 return 0; 3381 } 3382 3383 /** 3384 * @brief Auto Connection Establishment - Stop everything 3385 * @note Convenience function to stop all active auto connection attempts 3386 */ 3387 void gap_auto_connection_stop_all(void){ 3388 linked_list_iterator_t it; 3389 linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3390 while (linked_list_iterator_has_next(&it)){ 3391 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&it); 3392 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3393 // remove from controller if already present 3394 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3395 continue; 3396 } 3397 // directly remove entry from whitelist 3398 linked_list_iterator_remove(&it); 3399 btstack_memory_whitelist_entry_free(entry); 3400 } 3401 hci_run(); 3402 } 3403 3404 #endif 3405 3406 /** 3407 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3408 */ 3409 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3410 hci_stack->sco_voice_setting = voice_setting; 3411 } 3412 3413 /** 3414 * @brief Get SCO Voice Setting 3415 * @return current voice setting 3416 */ 3417 uint16_t hci_get_sco_voice_setting(){ 3418 return hci_stack->sco_voice_setting; 3419 } 3420 3421 /** 3422 * @brief Set callback for Bluetooth Hardware Error 3423 */ 3424 void hci_set_hardware_error_callback(void (*fn)(void)){ 3425 hci_stack->hardware_error_callback = fn; 3426 } 3427 3428 3429 void hci_disconnect_all(void){ 3430 linked_list_iterator_t it; 3431 linked_list_iterator_init(&it, &hci_stack->connections); 3432 while (linked_list_iterator_has_next(&it)){ 3433 hci_connection_t * con = (hci_connection_t*) linked_list_iterator_next(&it); 3434 if (con->state == SENT_DISCONNECT) continue; 3435 con->state = SEND_DISCONNECT; 3436 } 3437 hci_run(); 3438 } 3439