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 #include <stdarg.h> 51 #include <string.h> 52 #include <stdio.h> 53 54 #ifndef EMBEDDED 55 #ifdef _WIN32 56 #include "Winsock2.h" 57 #else 58 #include <unistd.h> // gethostbyname 59 #endif 60 #include <btstack/version.h> 61 #endif 62 63 #include "btstack_memory.h" 64 #include "debug.h" 65 #include "hci_dump.h" 66 67 #include <btstack/linked_list.h> 68 #include <btstack/hci_cmds.h> 69 70 #define HCI_CONNECTION_TIMEOUT_MS 10000 71 72 #ifdef USE_BLUETOOL 73 #include "../platforms/ios/src/bt_control_iphone.h" 74 #endif 75 76 static void hci_update_scan_enable(void); 77 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 78 static void hci_connection_timeout_handler(timer_source_t *timer); 79 static void hci_connection_timestamp(hci_connection_t *connection); 80 static int hci_power_control_on(void); 81 static void hci_power_control_off(void); 82 static void hci_state_reset(); 83 84 // the STACK is here 85 #ifndef HAVE_MALLOC 86 static hci_stack_t hci_stack_static; 87 #endif 88 static hci_stack_t * hci_stack = NULL; 89 90 // test helper 91 static uint8_t disable_l2cap_timeouts = 0; 92 93 /** 94 * create connection for given address 95 * 96 * @return connection OR NULL, if no memory left 97 */ 98 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 99 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 100 hci_connection_t * conn = btstack_memory_hci_connection_get(); 101 if (!conn) return NULL; 102 memset(conn, 0, sizeof(hci_connection_t)); 103 BD_ADDR_COPY(conn->address, addr); 104 conn->address_type = addr_type; 105 conn->con_handle = 0xffff; 106 conn->authentication_flags = AUTH_FLAGS_NONE; 107 conn->bonding_flags = 0; 108 conn->requested_security_level = LEVEL_0; 109 linked_item_set_user(&conn->timeout.item, conn); 110 conn->timeout.process = hci_connection_timeout_handler; 111 hci_connection_timestamp(conn); 112 conn->acl_recombination_length = 0; 113 conn->acl_recombination_pos = 0; 114 conn->num_acl_packets_sent = 0; 115 conn->num_sco_packets_sent = 0; 116 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 117 linked_list_add(&hci_stack->connections, (linked_item_t *) conn); 118 return conn; 119 } 120 121 122 /** 123 * get le connection parameter range 124 * 125 * @return le connection parameter range struct 126 */ 127 le_connection_parameter_range_t gap_le_get_connection_parameter_range(){ 128 return hci_stack->le_connection_parameter_range; 129 } 130 131 /** 132 * set le connection parameter range 133 * 134 */ 135 136 void gap_le_set_connection_parameter_range(le_connection_parameter_range_t range){ 137 hci_stack->le_connection_parameter_range.le_conn_interval_min = range.le_conn_interval_min; 138 hci_stack->le_connection_parameter_range.le_conn_interval_max = range.le_conn_interval_max; 139 hci_stack->le_connection_parameter_range.le_conn_interval_min = range.le_conn_latency_min; 140 hci_stack->le_connection_parameter_range.le_conn_interval_max = range.le_conn_latency_max; 141 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = range.le_supervision_timeout_min; 142 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = range.le_supervision_timeout_max; 143 } 144 145 /** 146 * get hci connections iterator 147 * 148 * @return hci connections iterator 149 */ 150 151 void hci_connections_get_iterator(linked_list_iterator_t *it){ 152 linked_list_iterator_init(it, &hci_stack->connections); 153 } 154 155 /** 156 * get connection for a given handle 157 * 158 * @return connection OR NULL, if not found 159 */ 160 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 161 linked_list_iterator_t it; 162 linked_list_iterator_init(&it, &hci_stack->connections); 163 while (linked_list_iterator_has_next(&it)){ 164 hci_connection_t * item = (hci_connection_t *) linked_list_iterator_next(&it); 165 if ( item->con_handle == con_handle ) { 166 return item; 167 } 168 } 169 return NULL; 170 } 171 172 /** 173 * get connection for given address 174 * 175 * @return connection OR NULL, if not found 176 */ 177 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 178 linked_list_iterator_t it; 179 linked_list_iterator_init(&it, &hci_stack->connections); 180 while (linked_list_iterator_has_next(&it)){ 181 hci_connection_t * connection = (hci_connection_t *) linked_list_iterator_next(&it); 182 if (connection->address_type != addr_type) continue; 183 if (memcmp(addr, connection->address, 6) != 0) continue; 184 return connection; 185 } 186 return NULL; 187 } 188 189 static void hci_connection_timeout_handler(timer_source_t *timer){ 190 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 191 #ifdef HAVE_TIME 192 struct timeval tv; 193 gettimeofday(&tv, NULL); 194 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 195 // connections might be timed out 196 hci_emit_l2cap_check_timeout(connection); 197 } 198 #endif 199 #ifdef HAVE_TICK 200 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 201 // connections might be timed out 202 hci_emit_l2cap_check_timeout(connection); 203 } 204 #endif 205 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 206 run_loop_add_timer(timer); 207 } 208 209 static void hci_connection_timestamp(hci_connection_t *connection){ 210 #ifdef HAVE_TIME 211 gettimeofday(&connection->timestamp, NULL); 212 #endif 213 #ifdef HAVE_TICK 214 connection->timestamp = embedded_get_ticks(); 215 #endif 216 } 217 218 219 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 220 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 221 } 222 223 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 224 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 225 } 226 227 228 /** 229 * add authentication flags and reset timer 230 * @note: assumes classic connection 231 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 232 */ 233 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 234 bd_addr_t addr; 235 bt_flip_addr(addr, bd_addr); 236 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 237 if (conn) { 238 connectionSetAuthenticationFlags(conn, flags); 239 hci_connection_timestamp(conn); 240 } 241 } 242 243 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 244 hci_connection_t * conn = hci_connection_for_handle(handle); 245 if (!conn) return 0; 246 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 247 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 248 return 0; 249 } 250 251 void hci_drop_link_key_for_bd_addr(bd_addr_t addr){ 252 if (hci_stack->remote_device_db) { 253 hci_stack->remote_device_db->delete_link_key(addr); 254 } 255 } 256 257 int hci_is_le_connection(hci_connection_t * connection){ 258 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 259 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 260 } 261 262 263 /** 264 * count connections 265 */ 266 static int nr_hci_connections(void){ 267 int count = 0; 268 linked_item_t *it; 269 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 270 return count; 271 } 272 273 /** 274 * Dummy handler called by HCI 275 */ 276 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 277 } 278 279 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 280 hci_connection_t * connection = hci_connection_for_handle(handle); 281 if (!connection) { 282 log_error("hci_number_outgoing_packets: connection for handle %u does not exist!", handle); 283 return 0; 284 } 285 return connection->num_acl_packets_sent; 286 } 287 288 uint8_t hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 289 290 int num_packets_sent_classic = 0; 291 int num_packets_sent_le = 0; 292 293 bd_addr_type_t address_type = BD_ADDR_TYPE_UNKNOWN; 294 295 linked_item_t *it; 296 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 297 hci_connection_t * connection = (hci_connection_t *) it; 298 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 299 num_packets_sent_classic += connection->num_acl_packets_sent; 300 } else { 301 num_packets_sent_le += connection->num_acl_packets_sent; 302 } 303 // ignore connections that are not open, e.g., in state RECEIVED_DISCONNECTION_COMPLETE 304 if (connection->con_handle == con_handle && connection->state == OPEN){ 305 address_type = connection->address_type; 306 } 307 } 308 309 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 310 int free_slots_le = 0; 311 312 if (free_slots_classic < 0){ 313 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); 314 return 0; 315 } 316 317 if (hci_stack->le_acl_packets_total_num){ 318 // if we have LE slots, they are used 319 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 320 if (free_slots_le < 0){ 321 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); 322 return 0; 323 } 324 } else { 325 // otherwise, classic slots are used for LE, too 326 free_slots_classic -= num_packets_sent_le; 327 if (free_slots_classic < 0){ 328 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); 329 return 0; 330 } 331 } 332 333 switch (address_type){ 334 case BD_ADDR_TYPE_UNKNOWN: 335 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 336 return 0; 337 338 case BD_ADDR_TYPE_CLASSIC: 339 return free_slots_classic; 340 341 default: 342 if (hci_stack->le_acl_packets_total_num){ 343 return free_slots_le; 344 } 345 return free_slots_classic; 346 } 347 } 348 349 int hci_number_free_sco_slots_for_handle(hci_con_handle_t handle){ 350 int num_sco_packets_sent = 0; 351 linked_item_t *it; 352 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 353 hci_connection_t * connection = (hci_connection_t *) it; 354 num_sco_packets_sent += connection->num_sco_packets_sent; 355 } 356 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 357 log_info("hci_number_free_sco_slots_for_handle: outgoing packets (%u) > total packets ()", num_sco_packets_sent, hci_stack->sco_packets_total_num); 358 return 0; 359 } 360 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 361 } 362 363 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 364 int hci_can_send_command_packet_now(void){ 365 if (hci_stack->hci_packet_buffer_reserved) return 0; 366 367 // check for async hci transport implementations 368 if (hci_stack->hci_transport->can_send_packet_now){ 369 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 370 return 0; 371 } 372 } 373 374 return hci_stack->num_cmd_packets > 0; 375 } 376 377 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 378 // check for async hci transport implementations 379 if (hci_stack->hci_transport->can_send_packet_now){ 380 if (!hci_stack->hci_transport->can_send_packet_now(HCI_ACL_DATA_PACKET)){ 381 return 0; 382 } 383 } 384 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 385 } 386 387 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 388 if (hci_stack->hci_packet_buffer_reserved) return 0; 389 return hci_can_send_prepared_acl_packet_now(con_handle); 390 } 391 392 int hci_can_send_prepared_sco_packet_now(hci_con_handle_t con_handle){ 393 if (hci_stack->hci_transport->can_send_packet_now){ 394 if (!hci_stack->hci_transport->can_send_packet_now(HCI_SCO_DATA_PACKET)){ 395 return 0; 396 } 397 } 398 return hci_number_free_sco_slots_for_handle(con_handle) > 0; 399 } 400 401 int hci_can_send_sco_packet_now(hci_con_handle_t con_handle){ 402 if (hci_stack->hci_packet_buffer_reserved) return 0; 403 return hci_can_send_prepared_sco_packet_now(con_handle); 404 } 405 406 // used for internal checks in l2cap[-le].c 407 int hci_is_packet_buffer_reserved(void){ 408 return hci_stack->hci_packet_buffer_reserved; 409 } 410 411 // reserves outgoing packet buffer. @returns 1 if successful 412 int hci_reserve_packet_buffer(void){ 413 if (hci_stack->hci_packet_buffer_reserved) { 414 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 415 return 0; 416 } 417 hci_stack->hci_packet_buffer_reserved = 1; 418 return 1; 419 } 420 421 void hci_release_packet_buffer(void){ 422 hci_stack->hci_packet_buffer_reserved = 0; 423 } 424 425 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 426 int hci_transport_synchronous(void){ 427 return hci_stack->hci_transport->can_send_packet_now == NULL; 428 } 429 430 uint16_t hci_max_acl_le_data_packet_length(void){ 431 return hci_stack->le_data_packets_length > 0 ? hci_stack->le_data_packets_length : hci_stack->acl_data_packet_length; 432 } 433 434 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 435 436 // 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); 437 438 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 439 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 440 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 441 max_acl_data_packet_length = hci_stack->le_data_packets_length; 442 } 443 444 // testing: reduce buffer to minimum 445 // max_acl_data_packet_length = 52; 446 447 int err; 448 // multiple packets could be send on a synchronous HCI transport 449 while (1){ 450 451 // get current data 452 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 453 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 454 int more_fragments = 0; 455 456 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 457 if (current_acl_data_packet_length > max_acl_data_packet_length){ 458 more_fragments = 1; 459 current_acl_data_packet_length = max_acl_data_packet_length; 460 } 461 462 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 463 if (acl_header_pos > 0){ 464 uint16_t handle_and_flags = READ_BT_16(hci_stack->hci_packet_buffer, 0); 465 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 466 bt_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 467 } 468 469 // update header len 470 bt_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 471 472 // count packet 473 connection->num_acl_packets_sent++; 474 475 // send packet 476 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 477 const int size = current_acl_data_packet_length + 4; 478 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 479 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 480 481 // done yet? 482 if (!more_fragments) break; 483 484 // update start of next fragment to send 485 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 486 487 // can send more? 488 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 489 } 490 491 // done 492 hci_stack->acl_fragmentation_pos = 0; 493 hci_stack->acl_fragmentation_total_size = 0; 494 495 // release buffer now for synchronous transport 496 if (hci_transport_synchronous()){ 497 hci_release_packet_buffer(); 498 // notify upper stack that iit might be possible to send again 499 uint8_t event[] = { DAEMON_EVENT_HCI_PACKET_SENT, 0}; 500 hci_stack->packet_handler(HCI_EVENT_PACKET, &event[0], sizeof(event)); 501 } 502 503 return err; 504 } 505 506 // pre: caller has reserved the packet buffer 507 int hci_send_acl_packet_buffer(int size){ 508 509 // log_info("hci_send_acl_packet_buffer size %u", size); 510 511 if (!hci_stack->hci_packet_buffer_reserved) { 512 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 513 return 0; 514 } 515 516 uint8_t * packet = hci_stack->hci_packet_buffer; 517 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 518 519 // check for free places on Bluetooth module 520 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 521 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 522 hci_release_packet_buffer(); 523 return BTSTACK_ACL_BUFFERS_FULL; 524 } 525 526 hci_connection_t *connection = hci_connection_for_handle( con_handle); 527 if (!connection) { 528 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 529 hci_release_packet_buffer(); 530 return 0; 531 } 532 hci_connection_timestamp(connection); 533 534 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 535 536 // setup data 537 hci_stack->acl_fragmentation_total_size = size; 538 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 539 540 return hci_send_acl_packet_fragments(connection); 541 } 542 543 // pre: caller has reserved the packet buffer 544 int hci_send_sco_packet_buffer(int size){ 545 546 // log_info("hci_send_acl_packet_buffer size %u", size); 547 548 if (!hci_stack->hci_packet_buffer_reserved) { 549 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 550 return 0; 551 } 552 553 uint8_t * packet = hci_stack->hci_packet_buffer; 554 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 555 556 // check for free places on Bluetooth module 557 if (!hci_can_send_prepared_sco_packet_now(con_handle)) { 558 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 559 hci_release_packet_buffer(); 560 return BTSTACK_ACL_BUFFERS_FULL; 561 } 562 563 // track send packet in connection struct 564 hci_connection_t *connection = hci_connection_for_handle( con_handle); 565 if (!connection) { 566 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 567 hci_release_packet_buffer(); 568 return 0; 569 } 570 connection->num_sco_packets_sent++; 571 572 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 573 return hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 574 } 575 576 static void acl_handler(uint8_t *packet, int size){ 577 578 // log_info("acl_handler: size %u", size); 579 580 // get info 581 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 582 hci_connection_t *conn = hci_connection_for_handle(con_handle); 583 uint8_t acl_flags = READ_ACL_FLAGS(packet); 584 uint16_t acl_length = READ_ACL_LENGTH(packet); 585 586 // ignore non-registered handle 587 if (!conn){ 588 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 589 return; 590 } 591 592 // assert packet is complete 593 if (acl_length + 4 != size){ 594 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 595 return; 596 } 597 598 // update idle timestamp 599 hci_connection_timestamp(conn); 600 601 // handle different packet types 602 switch (acl_flags & 0x03) { 603 604 case 0x01: // continuation fragment 605 606 // sanity checks 607 if (conn->acl_recombination_pos == 0) { 608 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 609 return; 610 } 611 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 612 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 613 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 614 conn->acl_recombination_pos = 0; 615 return; 616 } 617 618 // append fragment payload (header already stored) 619 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 620 conn->acl_recombination_pos += acl_length; 621 622 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 623 // conn->acl_recombination_pos, conn->acl_recombination_length); 624 625 // forward complete L2CAP packet if complete. 626 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 627 628 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, &conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 629 // reset recombination buffer 630 conn->acl_recombination_length = 0; 631 conn->acl_recombination_pos = 0; 632 } 633 break; 634 635 case 0x02: { // first fragment 636 637 // sanity check 638 if (conn->acl_recombination_pos) { 639 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 640 conn->acl_recombination_pos = 0; 641 } 642 643 // peek into L2CAP packet! 644 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 645 646 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 647 648 // compare fragment size to L2CAP packet size 649 if (acl_length >= l2cap_length + 4){ 650 651 // forward fragment as L2CAP packet 652 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 653 654 } else { 655 656 if (acl_length > HCI_ACL_BUFFER_SIZE){ 657 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 658 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 659 return; 660 } 661 662 // store first fragment and tweak acl length for complete package 663 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 664 conn->acl_recombination_pos = acl_length + 4; 665 conn->acl_recombination_length = l2cap_length; 666 bt_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 667 } 668 break; 669 670 } 671 default: 672 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 673 return; 674 } 675 676 // execute main loop 677 hci_run(); 678 } 679 680 static void hci_shutdown_connection(hci_connection_t *conn){ 681 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 682 683 run_loop_remove_timer(&conn->timeout); 684 685 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 686 btstack_memory_hci_connection_free( conn ); 687 688 // now it's gone 689 hci_emit_nr_connections_changed(); 690 } 691 692 static const uint16_t packet_type_sizes[] = { 693 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 694 HCI_ACL_DH1_SIZE, 0, 0, 0, 695 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 696 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 697 }; 698 static const uint8_t packet_type_feature_requirement_bit[] = { 699 0, // 3 slot packets 700 1, // 5 slot packets 701 25, // EDR 2 mpbs 702 26, // EDR 3 mbps 703 39, // 3 slot EDR packts 704 40, // 5 slot EDR packet 705 }; 706 static const uint16_t packet_type_feature_packet_mask[] = { 707 0x0f00, // 3 slot packets 708 0xf000, // 5 slot packets 709 0x1102, // EDR 2 mpbs 710 0x2204, // EDR 3 mbps 711 0x0300, // 3 slot EDR packts 712 0x3000, // 5 slot EDR packet 713 }; 714 715 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 716 // enable packet types based on size 717 uint16_t packet_types = 0; 718 unsigned int i; 719 for (i=0;i<16;i++){ 720 if (packet_type_sizes[i] == 0) continue; 721 if (packet_type_sizes[i] <= buffer_size){ 722 packet_types |= 1 << i; 723 } 724 } 725 // disable packet types due to missing local supported features 726 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 727 int bit_idx = packet_type_feature_requirement_bit[i]; 728 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 729 if (feature_set) continue; 730 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 731 packet_types &= ~packet_type_feature_packet_mask[i]; 732 } 733 // flip bits for "may not be used" 734 packet_types ^= 0x3306; 735 return packet_types; 736 } 737 738 uint16_t hci_usable_acl_packet_types(void){ 739 return hci_stack->packet_types; 740 } 741 742 uint8_t* hci_get_outgoing_packet_buffer(void){ 743 // hci packet buffer is >= acl data packet length 744 return hci_stack->hci_packet_buffer; 745 } 746 747 uint16_t hci_max_acl_data_packet_length(void){ 748 return hci_stack->acl_data_packet_length; 749 } 750 751 int hci_non_flushable_packet_boundary_flag_supported(void){ 752 // No. 54, byte 6, bit 6 753 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 754 } 755 756 int hci_ssp_supported(void){ 757 // No. 51, byte 6, bit 3 758 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 759 } 760 761 int hci_classic_supported(void){ 762 // No. 37, byte 4, bit 5, = No BR/EDR Support 763 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 764 } 765 766 int hci_le_supported(void){ 767 #ifdef HAVE_BLE 768 // No. 37, byte 4, bit 6 = LE Supported (Controller) 769 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 770 #else 771 return 0; 772 #endif 773 } 774 775 // get addr type and address used in advertisement packets 776 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t addr){ 777 *addr_type = hci_stack->adv_addr_type; 778 if (hci_stack->adv_addr_type){ 779 memcpy(addr, hci_stack->adv_address, 6); 780 } else { 781 memcpy(addr, hci_stack->local_bd_addr, 6); 782 } 783 } 784 785 #ifdef HAVE_BLE 786 void le_handle_advertisement_report(uint8_t *packet, int size){ 787 int offset = 3; 788 int num_reports = packet[offset]; 789 offset += 1; 790 791 int i; 792 log_info("HCI: handle adv report with num reports: %d", num_reports); 793 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 794 for (i=0; i<num_reports;i++){ 795 uint8_t data_length = packet[offset + 8]; 796 uint8_t event_size = 10 + data_length; 797 int pos = 0; 798 event[pos++] = GAP_LE_ADVERTISING_REPORT; 799 event[pos++] = event_size; 800 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 801 offset += 8; 802 pos += 8; 803 event[pos++] = packet[offset + 1 + data_length]; // rssi 804 event[pos++] = packet[offset++]; //data_length; 805 memcpy(&event[pos], &packet[offset], data_length); 806 pos += data_length; 807 offset += data_length + 1; // rssi 808 hci_dump_packet( HCI_EVENT_PACKET, 0, event, pos); 809 hci_stack->packet_handler(HCI_EVENT_PACKET, event, pos); 810 } 811 } 812 #endif 813 814 static void hci_initialization_timeout_handler(timer_source_t * ds){ 815 switch (hci_stack->substate){ 816 case HCI_INIT_W4_SEND_RESET: 817 log_info("Resend HCI Reset"); 818 hci_stack->substate = HCI_INIT_SEND_RESET; 819 hci_stack->num_cmd_packets = 1; 820 hci_run(); 821 break; 822 default: 823 break; 824 } 825 } 826 827 static void hci_initializing_next_state(){ 828 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 829 } 830 831 // assumption: hci_can_send_command_packet_now() == true 832 static void hci_initializing_run(){ 833 // log_info("hci_init: substate %u", hci_stack->substate >> 1); 834 switch (hci_stack->substate){ 835 case HCI_INIT_SEND_RESET: 836 hci_state_reset(); 837 // prepare reset if command complete not received in 100ms 838 run_loop_set_timer(&hci_stack->timeout, 100); 839 run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 840 run_loop_add_timer(&hci_stack->timeout); 841 // send command 842 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 843 hci_send_cmd(&hci_reset); 844 break; 845 case HCI_INIT_SEND_BAUD_CHANGE: 846 hci_stack->control->baudrate_cmd(hci_stack->config, ((hci_uart_config_t *)hci_stack->config)->baudrate_main, hci_stack->hci_packet_buffer); 847 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 848 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 849 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 850 break; 851 case HCI_INIT_SET_BD_ADDR: 852 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 853 hci_stack->control->set_bd_addr_cmd(hci_stack->config, hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 854 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 855 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 856 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 857 break; 858 case HCI_INIT_CUSTOM_INIT: 859 log_info("Custom init"); 860 // Custom initialization 861 if (hci_stack->control && hci_stack->control->next_cmd){ 862 int valid_cmd = (*hci_stack->control->next_cmd)(hci_stack->config, hci_stack->hci_packet_buffer); 863 if (valid_cmd){ 864 int size = 3 + hci_stack->hci_packet_buffer[2]; 865 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 866 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 867 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; // more init commands 868 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 869 break; 870 } 871 log_info("hci_run: init script done"); 872 } 873 // otherwise continue 874 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 875 hci_send_cmd(&hci_read_bd_addr); 876 break; 877 case HCI_INIT_READ_BUFFER_SIZE: 878 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 879 hci_send_cmd(&hci_read_buffer_size); 880 break; 881 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATUES: 882 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATUES; 883 hci_send_cmd(&hci_read_local_supported_features); 884 break; 885 case HCI_INIT_SET_EVENT_MASK: 886 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 887 if (hci_le_supported()){ 888 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 889 } else { 890 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 891 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 892 } 893 break; 894 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 895 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 896 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 897 break; 898 case HCI_INIT_WRITE_PAGE_TIMEOUT: 899 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 900 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 901 break; 902 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 903 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 904 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 905 break; 906 case HCI_INIT_WRITE_LOCAL_NAME: 907 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 908 if (hci_stack->local_name){ 909 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 910 } else { 911 char hostname[30]; 912 #ifdef EMBEDDED 913 // BTstack-11:22:33:44:55:66 914 strcpy(hostname, "BTstack "); 915 strcat(hostname, bd_addr_to_str(hci_stack->local_bd_addr)); 916 log_info("---> Name %s", hostname); 917 #else 918 // hostname for POSIX systems 919 gethostname(hostname, 30); 920 hostname[29] = '\0'; 921 #endif 922 hci_send_cmd(&hci_write_local_name, hostname); 923 } 924 break; 925 case HCI_INIT_WRITE_SCAN_ENABLE: 926 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 927 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 928 break; 929 #ifdef HAVE_BLE 930 // LE INIT 931 case HCI_INIT_LE_READ_BUFFER_SIZE: 932 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 933 hci_send_cmd(&hci_le_read_buffer_size); 934 break; 935 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 936 // LE Supported Host = 1, Simultaneous Host = 0 937 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 938 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 939 break; 940 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 941 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 942 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 943 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 944 break; 945 #endif 946 // DONE 947 case HCI_INIT_DONE: 948 // done. 949 hci_stack->state = HCI_STATE_WORKING; 950 hci_emit_state(); 951 return; 952 default: 953 return; 954 } 955 } 956 957 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 958 uint8_t command_completed = 0; 959 960 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 961 uint16_t opcode = READ_BT_16(packet,3); 962 if (opcode == hci_stack->last_cmd_opcode){ 963 command_completed = 1; 964 log_info("Command complete for expected opcode %04x -> new substate %u", opcode, hci_stack->substate >> 1); 965 } else { 966 log_info("Command complete for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 967 } 968 } 969 if (packet[0] == HCI_EVENT_COMMAND_STATUS){ 970 uint8_t status = packet[2]; 971 uint16_t opcode = READ_BT_16(packet,4); 972 if (opcode == hci_stack->last_cmd_opcode){ 973 if (status){ 974 command_completed = 1; 975 log_error("Command status error 0x%02x for expected opcode %04x -> new substate %u", status, opcode, hci_stack->substate >> 1); 976 } else { 977 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 978 } 979 } else { 980 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 981 } 982 } 983 984 if (!command_completed) return; 985 986 switch(hci_stack->substate){ 987 case HCI_INIT_W4_SEND_RESET: 988 run_loop_remove_timer(&hci_stack->timeout); 989 if (hci_stack->config == NULL || ((hci_uart_config_t *)hci_stack->config)->baudrate_main == 0){ 990 if (hci_stack->custom_bd_addr_set && hci_stack->control && hci_stack->control->set_bd_addr_cmd){ 991 // skip baud change 992 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 993 return; 994 } else { 995 // skip baud change and set bd addr 996 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 997 return; 998 } 999 } 1000 break; 1001 case HCI_INIT_LOCAL_BAUD_CHANGE: 1002 log_info("Local baud rate change"); 1003 hci_stack->hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack->config)->baudrate_main); 1004 if (hci_stack->custom_bd_addr_set && hci_stack->control && hci_stack->control->set_bd_addr_cmd){ 1005 // skip baud change 1006 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1007 return; 1008 } else { 1009 // skip baud change and set bd addr 1010 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1011 return; 1012 } 1013 break; 1014 case HCI_INIT_W4_CUSTOM_INIT: 1015 // repeat custom init 1016 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1017 return; 1018 case HCI_INIT_W4_SET_EVENT_MASK: 1019 // skip Classic init commands for LE only chipsets 1020 if (!hci_classic_supported()){ 1021 if (hci_le_supported()){ 1022 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1023 return; 1024 } else { 1025 log_error("Neither BR/EDR nor LE supported"); 1026 hci_stack->substate = HCI_INIT_DONE; // skip all 1027 return; 1028 } 1029 } 1030 if (!hci_ssp_supported()){ 1031 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1032 return; 1033 } 1034 break; 1035 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1036 if (!hci_le_supported()){ 1037 // SKIP LE init for Classic only configuration 1038 hci_stack->substate = HCI_INIT_DONE; 1039 return; 1040 } 1041 default: 1042 break; 1043 } 1044 hci_initializing_next_state(); 1045 } 1046 1047 1048 // avoid huge local variables 1049 #ifndef EMBEDDED 1050 static device_name_t device_name; 1051 #endif 1052 static void event_handler(uint8_t *packet, int size){ 1053 1054 uint16_t event_length = packet[1]; 1055 1056 // assert packet is complete 1057 if (size != event_length + 2){ 1058 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 1059 return; 1060 } 1061 1062 bd_addr_t addr; 1063 bd_addr_type_t addr_type; 1064 uint8_t link_type; 1065 hci_con_handle_t handle; 1066 hci_connection_t * conn; 1067 int i; 1068 1069 // log_info("HCI:EVENT:%02x", packet[0]); 1070 1071 switch (packet[0]) { 1072 1073 case HCI_EVENT_COMMAND_COMPLETE: 1074 // get num cmd packets 1075 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1076 hci_stack->num_cmd_packets = packet[2]; 1077 1078 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 1079 // from offset 5 1080 // status 1081 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1082 hci_stack->acl_data_packet_length = READ_BT_16(packet, 6); 1083 hci_stack->sco_data_packet_length = packet[8]; 1084 hci_stack->acl_packets_total_num = READ_BT_16(packet, 9); 1085 hci_stack->sco_packets_total_num = READ_BT_16(packet, 11); 1086 1087 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1088 // determine usable ACL payload size 1089 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1090 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1091 } 1092 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1093 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1094 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1095 } 1096 } 1097 #ifdef HAVE_BLE 1098 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 1099 hci_stack->le_data_packets_length = READ_BT_16(packet, 6); 1100 hci_stack->le_acl_packets_total_num = packet[8]; 1101 // determine usable ACL payload size 1102 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1103 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1104 } 1105 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1106 } 1107 #endif 1108 // Dump local address 1109 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 1110 bt_flip_addr(hci_stack->local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 1111 log_info("Local Address, Status: 0x%02x: Addr: %s", 1112 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1113 } 1114 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1115 hci_emit_discoverable_enabled(hci_stack->discoverable); 1116 } 1117 // Note: HCI init checks 1118 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 1119 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1120 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 1121 hci_stack->local_supported_features[0], hci_stack->local_supported_features[1], 1122 hci_stack->local_supported_features[2], hci_stack->local_supported_features[3], 1123 hci_stack->local_supported_features[4], hci_stack->local_supported_features[5], 1124 hci_stack->local_supported_features[6], hci_stack->local_supported_features[7]); 1125 1126 // determine usable ACL packet types based on host buffer size and supported features 1127 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1128 log_info("packet types %04x", hci_stack->packet_types); 1129 1130 // Classic/LE 1131 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1132 } 1133 break; 1134 1135 case HCI_EVENT_COMMAND_STATUS: 1136 // get num cmd packets 1137 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1138 hci_stack->num_cmd_packets = packet[3]; 1139 break; 1140 1141 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1142 int offset = 3; 1143 for (i=0; i<packet[2];i++){ 1144 handle = READ_BT_16(packet, offset); 1145 offset += 2; 1146 uint16_t num_packets = READ_BT_16(packet, offset); 1147 offset += 2; 1148 1149 conn = hci_connection_for_handle(handle); 1150 if (!conn){ 1151 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1152 continue; 1153 } 1154 1155 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1156 if (conn->num_sco_packets_sent >= num_packets){ 1157 conn->num_sco_packets_sent -= num_packets; 1158 } else { 1159 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1160 conn->num_sco_packets_sent = 0; 1161 } 1162 1163 } else { 1164 if (conn->num_acl_packets_sent >= num_packets){ 1165 conn->num_acl_packets_sent -= num_packets; 1166 } else { 1167 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1168 conn->num_acl_packets_sent = 0; 1169 } 1170 } 1171 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1172 } 1173 break; 1174 } 1175 case HCI_EVENT_CONNECTION_REQUEST: 1176 bt_flip_addr(addr, &packet[2]); 1177 // TODO: eval COD 8-10 1178 link_type = packet[11]; 1179 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1180 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1181 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1182 if (!conn) { 1183 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1184 } 1185 if (!conn) { 1186 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1187 hci_stack->decline_reason = 0x0d; 1188 BD_ADDR_COPY(hci_stack->decline_addr, addr); 1189 break; 1190 } 1191 conn->state = RECEIVED_CONNECTION_REQUEST; 1192 hci_run(); 1193 break; 1194 1195 case HCI_EVENT_CONNECTION_COMPLETE: 1196 // Connection management 1197 bt_flip_addr(addr, &packet[5]); 1198 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1199 addr_type = BD_ADDR_TYPE_CLASSIC; 1200 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1201 if (conn) { 1202 if (!packet[2]){ 1203 conn->state = OPEN; 1204 conn->con_handle = READ_BT_16(packet, 3); 1205 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1206 1207 // restart timer 1208 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1209 run_loop_add_timer(&conn->timeout); 1210 1211 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1212 1213 hci_emit_nr_connections_changed(); 1214 } else { 1215 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1216 uint8_t status = packet[2]; 1217 bd_addr_t bd_address; 1218 memcpy(&bd_address, conn->address, 6); 1219 1220 // connection failed, remove entry 1221 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1222 btstack_memory_hci_connection_free( conn ); 1223 1224 // notify client if dedicated bonding 1225 if (notify_dedicated_bonding_failed){ 1226 log_info("hci notify_dedicated_bonding_failed"); 1227 hci_emit_dedicated_bonding_result(bd_address, status); 1228 } 1229 1230 // if authentication error, also delete link key 1231 if (packet[2] == 0x05) { 1232 hci_drop_link_key_for_bd_addr(addr); 1233 } 1234 } 1235 } 1236 break; 1237 1238 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1239 bt_flip_addr(addr, &packet[5]); 1240 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1241 if (packet[2]){ 1242 // connection failed 1243 break; 1244 } 1245 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1246 if (!conn) { 1247 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1248 } 1249 if (!conn) { 1250 break; 1251 } 1252 conn->state = OPEN; 1253 conn->con_handle = READ_BT_16(packet, 3); 1254 break; 1255 1256 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1257 handle = READ_BT_16(packet, 3); 1258 conn = hci_connection_for_handle(handle); 1259 if (!conn) break; 1260 if (!packet[2]){ 1261 uint8_t * features = &packet[5]; 1262 if (features[6] & (1 << 3)){ 1263 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1264 } 1265 } 1266 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1267 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x", conn->bonding_flags); 1268 if (conn->bonding_flags & BONDING_DEDICATED){ 1269 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1270 } 1271 break; 1272 1273 case HCI_EVENT_LINK_KEY_REQUEST: 1274 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1275 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1276 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1277 if (hci_stack->bondable && !hci_stack->remote_device_db) break; 1278 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1279 hci_run(); 1280 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1281 return; 1282 1283 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1284 bt_flip_addr(addr, &packet[2]); 1285 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1286 if (!conn) break; 1287 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1288 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1289 // Change Connection Encryption keeps link key type 1290 if (link_key_type != CHANGED_COMBINATION_KEY){ 1291 conn->link_key_type = link_key_type; 1292 } 1293 if (!hci_stack->remote_device_db) break; 1294 hci_stack->remote_device_db->put_link_key(addr, &packet[8], conn->link_key_type); 1295 // still forward event to allow dismiss of pairing dialog 1296 break; 1297 } 1298 1299 case HCI_EVENT_PIN_CODE_REQUEST: 1300 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1301 // non-bondable mode: pin code negative reply will be sent 1302 if (!hci_stack->bondable){ 1303 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1304 hci_run(); 1305 return; 1306 } 1307 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1308 if (!hci_stack->remote_device_db) break; 1309 bt_flip_addr(addr, &packet[2]); 1310 hci_stack->remote_device_db->delete_link_key(addr); 1311 break; 1312 1313 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1314 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1315 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1316 break; 1317 1318 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1319 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1320 if (!hci_stack->ssp_auto_accept) break; 1321 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1322 break; 1323 1324 case HCI_EVENT_USER_PASSKEY_REQUEST: 1325 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1326 if (!hci_stack->ssp_auto_accept) break; 1327 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1328 break; 1329 1330 case HCI_EVENT_ENCRYPTION_CHANGE: 1331 handle = READ_BT_16(packet, 3); 1332 conn = hci_connection_for_handle(handle); 1333 if (!conn) break; 1334 if (packet[2] == 0) { 1335 if (packet[5]){ 1336 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1337 } else { 1338 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1339 } 1340 } 1341 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1342 break; 1343 1344 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1345 handle = READ_BT_16(packet, 3); 1346 conn = hci_connection_for_handle(handle); 1347 if (!conn) break; 1348 1349 // dedicated bonding: send result and disconnect 1350 if (conn->bonding_flags & BONDING_DEDICATED){ 1351 conn->bonding_flags &= ~BONDING_DEDICATED; 1352 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1353 conn->bonding_status = packet[2]; 1354 break; 1355 } 1356 1357 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1358 // link key sufficient for requested security 1359 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1360 break; 1361 } 1362 // not enough 1363 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1364 break; 1365 1366 #ifndef EMBEDDED 1367 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1368 if (!hci_stack->remote_device_db) break; 1369 if (packet[2]) break; // status not ok 1370 bt_flip_addr(addr, &packet[3]); 1371 // fix for invalid remote names - terminate on 0xff 1372 for (i=0; i<248;i++){ 1373 if (packet[9+i] == 0xff){ 1374 packet[9+i] = 0; 1375 break; 1376 } 1377 } 1378 memset(&device_name, 0, sizeof(device_name_t)); 1379 strncpy((char*) device_name, (char*) &packet[9], 248); 1380 hci_stack->remote_device_db->put_name(addr, &device_name); 1381 break; 1382 1383 case HCI_EVENT_INQUIRY_RESULT: 1384 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI:{ 1385 if (!hci_stack->remote_device_db) break; 1386 // first send inq result packet 1387 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1388 // then send cached remote names 1389 int offset = 3; 1390 for (i=0; i<packet[2];i++){ 1391 bt_flip_addr(addr, &packet[offset]); 1392 offset += 14; // 6 + 1 + 1 + 1 + 3 + 2; 1393 if (hci_stack->remote_device_db->get_name(addr, &device_name)){ 1394 hci_emit_remote_name_cached(addr, &device_name); 1395 } 1396 } 1397 return; 1398 } 1399 #endif 1400 1401 // HCI_EVENT_DISCONNECTION_COMPLETE 1402 // has been split, to first notify stack before shutting connection down 1403 // see end of function, too. 1404 case HCI_EVENT_DISCONNECTION_COMPLETE: 1405 if (packet[2]) break; // status != 0 1406 handle = READ_BT_16(packet, 3); 1407 hci_connection_t * conn = hci_connection_for_handle(handle); 1408 if (!conn) break; // no conn struct anymore 1409 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1410 break; 1411 1412 case HCI_EVENT_HARDWARE_ERROR: 1413 if(hci_stack->control && hci_stack->control->hw_error){ 1414 (*hci_stack->control->hw_error)(); 1415 } else { 1416 // if no special requests, just reboot stack 1417 hci_power_control_off(); 1418 hci_power_control_on(); 1419 } 1420 break; 1421 1422 case DAEMON_EVENT_HCI_PACKET_SENT: 1423 // release packet buffer only for asynchronous transport and if there are not further fragements 1424 if (hci_transport_synchronous()) { 1425 log_error("Synchronous HCI Transport shouldn't send DAEMON_EVENT_HCI_PACKET_SENT"); 1426 return; // instead of break: to avoid re-entering hci_run() 1427 } 1428 if (hci_stack->acl_fragmentation_total_size) break; 1429 hci_release_packet_buffer(); 1430 break; 1431 1432 #ifdef HAVE_BLE 1433 case HCI_EVENT_LE_META: 1434 switch (packet[2]){ 1435 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1436 log_info("advertising report received"); 1437 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1438 le_handle_advertisement_report(packet, size); 1439 break; 1440 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1441 // Connection management 1442 bt_flip_addr(addr, &packet[8]); 1443 addr_type = (bd_addr_type_t)packet[7]; 1444 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1445 // LE connections are auto-accepted, so just create a connection if there isn't one already 1446 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1447 if (packet[3]){ 1448 if (conn){ 1449 // outgoing connection failed, remove entry 1450 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1451 btstack_memory_hci_connection_free( conn ); 1452 } 1453 // if authentication error, also delete link key 1454 if (packet[3] == 0x05) { 1455 hci_drop_link_key_for_bd_addr(addr); 1456 } 1457 break; 1458 } 1459 if (!conn){ 1460 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1461 } 1462 if (!conn){ 1463 // no memory 1464 break; 1465 } 1466 1467 conn->state = OPEN; 1468 conn->con_handle = READ_BT_16(packet, 4); 1469 1470 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1471 1472 // restart timer 1473 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1474 // run_loop_add_timer(&conn->timeout); 1475 1476 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1477 1478 hci_emit_nr_connections_changed(); 1479 break; 1480 1481 // log_info("LE buffer size: %u, count %u", READ_BT_16(packet,6), packet[8]); 1482 1483 default: 1484 break; 1485 } 1486 break; 1487 #endif 1488 default: 1489 break; 1490 } 1491 1492 // handle BT initialization 1493 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1494 hci_initializing_event_handler(packet, size); 1495 } 1496 1497 // help with BT sleep 1498 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1499 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1500 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1501 hci_initializing_next_state(); 1502 } 1503 1504 // notify upper stack 1505 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1506 1507 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1508 if (packet[0] == HCI_EVENT_DISCONNECTION_COMPLETE){ 1509 if (!packet[2]){ 1510 handle = READ_BT_16(packet, 3); 1511 hci_connection_t * conn = hci_connection_for_handle(handle); 1512 if (conn) { 1513 uint8_t status = conn->bonding_status; 1514 uint16_t flags = conn->bonding_flags; 1515 bd_addr_t bd_address; 1516 memcpy(&bd_address, conn->address, 6); 1517 hci_shutdown_connection(conn); 1518 // connection struct is gone, don't access anymore 1519 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1520 hci_emit_dedicated_bonding_result(bd_address, status); 1521 } 1522 } 1523 } 1524 } 1525 1526 // execute main loop 1527 hci_run(); 1528 } 1529 1530 static void sco_handler(uint8_t * packet, uint16_t size){ 1531 // not handled yet 1532 } 1533 1534 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1535 hci_dump_packet(packet_type, 1, packet, size); 1536 switch (packet_type) { 1537 case HCI_EVENT_PACKET: 1538 event_handler(packet, size); 1539 break; 1540 case HCI_ACL_DATA_PACKET: 1541 acl_handler(packet, size); 1542 break; 1543 case HCI_SCO_DATA_PACKET: 1544 sco_handler(packet, size); 1545 default: 1546 break; 1547 } 1548 } 1549 1550 /** Register HCI packet handlers */ 1551 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1552 hci_stack->packet_handler = handler; 1553 } 1554 1555 static void hci_state_reset(){ 1556 // no connections yet 1557 hci_stack->connections = NULL; 1558 1559 // keep discoverable/connectable as this has been requested by the client(s) 1560 // hci_stack->discoverable = 0; 1561 // hci_stack->connectable = 0; 1562 // hci_stack->bondable = 1; 1563 1564 // buffer is free 1565 hci_stack->hci_packet_buffer_reserved = 0; 1566 1567 // no pending cmds 1568 hci_stack->decline_reason = 0; 1569 hci_stack->new_scan_enable_value = 0xff; 1570 1571 // LE 1572 hci_stack->adv_addr_type = 0; 1573 memset(hci_stack->adv_address, 0, 6); 1574 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1575 hci_stack->le_scan_type = 0xff; 1576 hci_stack->le_connection_parameter_range.le_conn_interval_min = 0x0006; 1577 hci_stack->le_connection_parameter_range.le_conn_interval_max = 0x0C80; 1578 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0x0000; 1579 hci_stack->le_connection_parameter_range.le_conn_latency_max = 0x03E8; 1580 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 0x000A; 1581 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 0x0C80; 1582 } 1583 1584 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 1585 1586 #ifdef HAVE_MALLOC 1587 if (!hci_stack) { 1588 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1589 } 1590 #else 1591 hci_stack = &hci_stack_static; 1592 #endif 1593 memset(hci_stack, 0, sizeof(hci_stack_t)); 1594 1595 // reference to use transport layer implementation 1596 hci_stack->hci_transport = transport; 1597 1598 // references to used control implementation 1599 hci_stack->control = control; 1600 1601 // reference to used config 1602 hci_stack->config = config; 1603 1604 // higher level handler 1605 hci_stack->packet_handler = dummy_handler; 1606 1607 // store and open remote device db 1608 hci_stack->remote_device_db = remote_device_db; 1609 if (hci_stack->remote_device_db) { 1610 hci_stack->remote_device_db->open(); 1611 } 1612 1613 // max acl payload size defined in config.h 1614 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1615 1616 // register packet handlers with transport 1617 transport->register_packet_handler(&packet_handler); 1618 1619 hci_stack->state = HCI_STATE_OFF; 1620 1621 // class of device 1622 hci_stack->class_of_device = 0x007a020c; // Smartphone 1623 1624 // bondable by default 1625 hci_stack->bondable = 1; 1626 1627 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1628 hci_stack->ssp_enable = 1; 1629 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1630 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1631 hci_stack->ssp_auto_accept = 1; 1632 1633 hci_state_reset(); 1634 } 1635 1636 void hci_close(){ 1637 // close remote device db 1638 if (hci_stack->remote_device_db) { 1639 hci_stack->remote_device_db->close(); 1640 } 1641 while (hci_stack->connections) { 1642 // cancel all l2cap connections 1643 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 1644 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1645 } 1646 hci_power_control(HCI_POWER_OFF); 1647 1648 #ifdef HAVE_MALLOC 1649 free(hci_stack); 1650 #endif 1651 hci_stack = NULL; 1652 } 1653 1654 void hci_set_class_of_device(uint32_t class_of_device){ 1655 hci_stack->class_of_device = class_of_device; 1656 } 1657 1658 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 1659 void hci_set_bd_addr(bd_addr_t addr){ 1660 memcpy(hci_stack->custom_bd_addr, addr, 6); 1661 hci_stack->custom_bd_addr_set = 1; 1662 } 1663 1664 void hci_disable_l2cap_timeout_check(){ 1665 disable_l2cap_timeouts = 1; 1666 } 1667 // State-Module-Driver overview 1668 // state module low-level 1669 // HCI_STATE_OFF off close 1670 // HCI_STATE_INITIALIZING, on open 1671 // HCI_STATE_WORKING, on open 1672 // HCI_STATE_HALTING, on open 1673 // HCI_STATE_SLEEPING, off/sleep close 1674 // HCI_STATE_FALLING_ASLEEP on open 1675 1676 static int hci_power_control_on(void){ 1677 1678 // power on 1679 int err = 0; 1680 if (hci_stack->control && hci_stack->control->on){ 1681 err = (*hci_stack->control->on)(hci_stack->config); 1682 } 1683 if (err){ 1684 log_error( "POWER_ON failed"); 1685 hci_emit_hci_open_failed(); 1686 return err; 1687 } 1688 1689 // open low-level device 1690 err = hci_stack->hci_transport->open(hci_stack->config); 1691 if (err){ 1692 log_error( "HCI_INIT failed, turning Bluetooth off again"); 1693 if (hci_stack->control && hci_stack->control->off){ 1694 (*hci_stack->control->off)(hci_stack->config); 1695 } 1696 hci_emit_hci_open_failed(); 1697 return err; 1698 } 1699 return 0; 1700 } 1701 1702 static void hci_power_control_off(void){ 1703 1704 log_info("hci_power_control_off"); 1705 1706 // close low-level device 1707 hci_stack->hci_transport->close(hci_stack->config); 1708 1709 log_info("hci_power_control_off - hci_transport closed"); 1710 1711 // power off 1712 if (hci_stack->control && hci_stack->control->off){ 1713 (*hci_stack->control->off)(hci_stack->config); 1714 } 1715 1716 log_info("hci_power_control_off - control closed"); 1717 1718 hci_stack->state = HCI_STATE_OFF; 1719 } 1720 1721 static void hci_power_control_sleep(void){ 1722 1723 log_info("hci_power_control_sleep"); 1724 1725 #if 0 1726 // don't close serial port during sleep 1727 1728 // close low-level device 1729 hci_stack->hci_transport->close(hci_stack->config); 1730 #endif 1731 1732 // sleep mode 1733 if (hci_stack->control && hci_stack->control->sleep){ 1734 (*hci_stack->control->sleep)(hci_stack->config); 1735 } 1736 1737 hci_stack->state = HCI_STATE_SLEEPING; 1738 } 1739 1740 static int hci_power_control_wake(void){ 1741 1742 log_info("hci_power_control_wake"); 1743 1744 // wake on 1745 if (hci_stack->control && hci_stack->control->wake){ 1746 (*hci_stack->control->wake)(hci_stack->config); 1747 } 1748 1749 #if 0 1750 // open low-level device 1751 int err = hci_stack->hci_transport->open(hci_stack->config); 1752 if (err){ 1753 log_error( "HCI_INIT failed, turning Bluetooth off again"); 1754 if (hci_stack->control && hci_stack->control->off){ 1755 (*hci_stack->control->off)(hci_stack->config); 1756 } 1757 hci_emit_hci_open_failed(); 1758 return err; 1759 } 1760 #endif 1761 1762 return 0; 1763 } 1764 1765 static void hci_power_transition_to_initializing(void){ 1766 // set up state machine 1767 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1768 hci_stack->hci_packet_buffer_reserved = 0; 1769 hci_stack->state = HCI_STATE_INITIALIZING; 1770 hci_stack->substate = HCI_INIT_SEND_RESET; 1771 } 1772 1773 int hci_power_control(HCI_POWER_MODE power_mode){ 1774 1775 log_info("hci_power_control: %u, current mode %u", power_mode, hci_stack->state); 1776 1777 int err = 0; 1778 switch (hci_stack->state){ 1779 1780 case HCI_STATE_OFF: 1781 switch (power_mode){ 1782 case HCI_POWER_ON: 1783 err = hci_power_control_on(); 1784 if (err) { 1785 log_error("hci_power_control_on() error %u", err); 1786 return err; 1787 } 1788 hci_power_transition_to_initializing(); 1789 break; 1790 case HCI_POWER_OFF: 1791 // do nothing 1792 break; 1793 case HCI_POWER_SLEEP: 1794 // do nothing (with SLEEP == OFF) 1795 break; 1796 } 1797 break; 1798 1799 case HCI_STATE_INITIALIZING: 1800 switch (power_mode){ 1801 case HCI_POWER_ON: 1802 // do nothing 1803 break; 1804 case HCI_POWER_OFF: 1805 // no connections yet, just turn it off 1806 hci_power_control_off(); 1807 break; 1808 case HCI_POWER_SLEEP: 1809 // no connections yet, just turn it off 1810 hci_power_control_sleep(); 1811 break; 1812 } 1813 break; 1814 1815 case HCI_STATE_WORKING: 1816 switch (power_mode){ 1817 case HCI_POWER_ON: 1818 // do nothing 1819 break; 1820 case HCI_POWER_OFF: 1821 // see hci_run 1822 hci_stack->state = HCI_STATE_HALTING; 1823 break; 1824 case HCI_POWER_SLEEP: 1825 // see hci_run 1826 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1827 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 1828 break; 1829 } 1830 break; 1831 1832 case HCI_STATE_HALTING: 1833 switch (power_mode){ 1834 case HCI_POWER_ON: 1835 hci_power_transition_to_initializing(); 1836 break; 1837 case HCI_POWER_OFF: 1838 // do nothing 1839 break; 1840 case HCI_POWER_SLEEP: 1841 // see hci_run 1842 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1843 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 1844 break; 1845 } 1846 break; 1847 1848 case HCI_STATE_FALLING_ASLEEP: 1849 switch (power_mode){ 1850 case HCI_POWER_ON: 1851 1852 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1853 // nothing to do, if H4 supports power management 1854 if (bt_control_iphone_power_management_enabled()){ 1855 hci_stack->state = HCI_STATE_INITIALIZING; 1856 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 1857 break; 1858 } 1859 #endif 1860 hci_power_transition_to_initializing(); 1861 break; 1862 case HCI_POWER_OFF: 1863 // see hci_run 1864 hci_stack->state = HCI_STATE_HALTING; 1865 break; 1866 case HCI_POWER_SLEEP: 1867 // do nothing 1868 break; 1869 } 1870 break; 1871 1872 case HCI_STATE_SLEEPING: 1873 switch (power_mode){ 1874 case HCI_POWER_ON: 1875 1876 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1877 // nothing to do, if H4 supports power management 1878 if (bt_control_iphone_power_management_enabled()){ 1879 hci_stack->state = HCI_STATE_INITIALIZING; 1880 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 1881 hci_update_scan_enable(); 1882 break; 1883 } 1884 #endif 1885 err = hci_power_control_wake(); 1886 if (err) return err; 1887 hci_power_transition_to_initializing(); 1888 break; 1889 case HCI_POWER_OFF: 1890 hci_stack->state = HCI_STATE_HALTING; 1891 break; 1892 case HCI_POWER_SLEEP: 1893 // do nothing 1894 break; 1895 } 1896 break; 1897 } 1898 1899 // create internal event 1900 hci_emit_state(); 1901 1902 // trigger next/first action 1903 hci_run(); 1904 1905 return 0; 1906 } 1907 1908 static void hci_update_scan_enable(void){ 1909 // 2 = page scan, 1 = inq scan 1910 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 1911 hci_run(); 1912 } 1913 1914 void hci_discoverable_control(uint8_t enable){ 1915 if (enable) enable = 1; // normalize argument 1916 1917 if (hci_stack->discoverable == enable){ 1918 hci_emit_discoverable_enabled(hci_stack->discoverable); 1919 return; 1920 } 1921 1922 hci_stack->discoverable = enable; 1923 hci_update_scan_enable(); 1924 } 1925 1926 void hci_connectable_control(uint8_t enable){ 1927 if (enable) enable = 1; // normalize argument 1928 1929 // don't emit event 1930 if (hci_stack->connectable == enable) return; 1931 1932 hci_stack->connectable = enable; 1933 hci_update_scan_enable(); 1934 } 1935 1936 void hci_local_bd_addr(bd_addr_t address_buffer){ 1937 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 1938 } 1939 1940 void hci_run(){ 1941 1942 hci_connection_t * connection; 1943 linked_item_t * it; 1944 1945 // send continuation fragments first, as they block the prepared packet buffer 1946 if (hci_stack->acl_fragmentation_total_size > 0) { 1947 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 1948 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 1949 hci_connection_t *connection = hci_connection_for_handle(con_handle); 1950 if (connection) { 1951 hci_send_acl_packet_fragments(connection); 1952 return; 1953 } 1954 // connection gone -> discard further fragments 1955 hci_stack->acl_fragmentation_total_size = 0; 1956 hci_stack->acl_fragmentation_pos = 0; 1957 } 1958 } 1959 1960 if (!hci_can_send_command_packet_now()) return; 1961 1962 // global/non-connection oriented commands 1963 1964 // decline incoming connections 1965 if (hci_stack->decline_reason){ 1966 uint8_t reason = hci_stack->decline_reason; 1967 hci_stack->decline_reason = 0; 1968 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 1969 return; 1970 } 1971 1972 // send scan enable 1973 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 1974 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1975 hci_stack->new_scan_enable_value = 0xff; 1976 return; 1977 } 1978 1979 #ifdef HAVE_BLE 1980 // handle le scan 1981 if (hci_stack->state == HCI_STATE_WORKING){ 1982 switch(hci_stack->le_scanning_state){ 1983 case LE_START_SCAN: 1984 hci_stack->le_scanning_state = LE_SCANNING; 1985 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 1986 return; 1987 1988 case LE_STOP_SCAN: 1989 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1990 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 1991 return; 1992 default: 1993 break; 1994 } 1995 if (hci_stack->le_scan_type != 0xff){ 1996 // defaults: active scanning, accept all advertisement packets 1997 int scan_type = hci_stack->le_scan_type; 1998 hci_stack->le_scan_type = 0xff; 1999 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); 2000 return; 2001 } 2002 } 2003 #endif 2004 2005 // send pending HCI commands 2006 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 2007 connection = (hci_connection_t *) it; 2008 2009 switch(connection->state){ 2010 case SEND_CREATE_CONNECTION: 2011 switch(connection->address_type){ 2012 case BD_ADDR_TYPE_CLASSIC: 2013 log_info("sending hci_create_connection"); 2014 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2015 break; 2016 default: 2017 #ifdef HAVE_BLE 2018 log_info("sending hci_le_create_connection"); 2019 hci_send_cmd(&hci_le_create_connection, 2020 0x0060, // scan interval: 60 ms 2021 0x0030, // scan interval: 30 ms 2022 0, // don't use whitelist 2023 connection->address_type, // peer address type 2024 connection->address, // peer bd addr 2025 hci_stack->adv_addr_type, // our addr type: 2026 0x0008, // conn interval min 2027 0x0018, // conn interval max 2028 0, // conn latency 2029 0x0048, // supervision timeout 2030 0x0001, // min ce length 2031 0x0001 // max ce length 2032 ); 2033 2034 connection->state = SENT_CREATE_CONNECTION; 2035 #endif 2036 break; 2037 } 2038 return; 2039 2040 case RECEIVED_CONNECTION_REQUEST: 2041 log_info("sending hci_accept_connection_request"); 2042 connection->state = ACCEPTED_CONNECTION_REQUEST; 2043 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2044 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2045 } else { 2046 // TODO: allows to customize synchronous connection parameters 2047 hci_send_cmd(&hci_accept_synchronous_connection_command, connection->address, 8000, 8000, 0xFFFF, 0x0060, 0xFF, 0x003F); 2048 } 2049 return; 2050 2051 #ifdef HAVE_BLE 2052 case SEND_CANCEL_CONNECTION: 2053 connection->state = SENT_CANCEL_CONNECTION; 2054 hci_send_cmd(&hci_le_create_connection_cancel); 2055 return; 2056 #endif 2057 case SEND_DISCONNECT: 2058 connection->state = SENT_DISCONNECT; 2059 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2060 return; 2061 2062 default: 2063 break; 2064 } 2065 2066 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2067 log_info("responding to link key request"); 2068 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2069 link_key_t link_key; 2070 link_key_type_t link_key_type; 2071 if ( hci_stack->remote_device_db 2072 && hci_stack->remote_device_db->get_link_key(connection->address, link_key, &link_key_type) 2073 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2074 connection->link_key_type = link_key_type; 2075 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2076 } else { 2077 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2078 } 2079 return; 2080 } 2081 2082 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2083 log_info("denying to pin request"); 2084 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2085 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2086 return; 2087 } 2088 2089 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2090 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2091 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2092 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2093 // tweak authentication requirements 2094 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2095 if (connection->bonding_flags & BONDING_DEDICATED){ 2096 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2097 } 2098 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2099 authreq |= 1; 2100 } 2101 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2102 } else { 2103 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2104 } 2105 return; 2106 } 2107 2108 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2109 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2110 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2111 return; 2112 } 2113 2114 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2115 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2116 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2117 return; 2118 } 2119 2120 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2121 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2122 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2123 return; 2124 } 2125 2126 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2127 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2128 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2129 return; 2130 } 2131 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2132 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2133 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2134 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2135 return; 2136 } 2137 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2138 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2139 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2140 return; 2141 } 2142 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2143 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2144 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2145 return; 2146 } 2147 2148 #ifdef HAVE_BLE 2149 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2150 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2151 2152 uint16_t connection_interval_min = connection->le_conn_interval_min; 2153 connection->le_conn_interval_min = 0; 2154 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2155 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2156 0x0000, 0xffff); 2157 } 2158 #endif 2159 } 2160 2161 switch (hci_stack->state){ 2162 case HCI_STATE_INITIALIZING: 2163 hci_initializing_run(); 2164 break; 2165 2166 case HCI_STATE_HALTING: 2167 2168 log_info("HCI_STATE_HALTING"); 2169 // close all open connections 2170 connection = (hci_connection_t *) hci_stack->connections; 2171 if (connection){ 2172 2173 // send disconnect 2174 if (!hci_can_send_command_packet_now()) return; 2175 2176 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2177 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2178 2179 // send disconnected event right away - causes higher layer connections to get closed, too. 2180 hci_shutdown_connection(connection); 2181 return; 2182 } 2183 log_info("HCI_STATE_HALTING, calling off"); 2184 2185 // switch mode 2186 hci_power_control_off(); 2187 2188 log_info("HCI_STATE_HALTING, emitting state"); 2189 hci_emit_state(); 2190 log_info("HCI_STATE_HALTING, done"); 2191 break; 2192 2193 case HCI_STATE_FALLING_ASLEEP: 2194 switch(hci_stack->substate) { 2195 case HCI_FALLING_ASLEEP_DISCONNECT: 2196 log_info("HCI_STATE_FALLING_ASLEEP"); 2197 // close all open connections 2198 connection = (hci_connection_t *) hci_stack->connections; 2199 2200 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2201 // don't close connections, if H4 supports power management 2202 if (bt_control_iphone_power_management_enabled()){ 2203 connection = NULL; 2204 } 2205 #endif 2206 if (connection){ 2207 2208 // send disconnect 2209 if (!hci_can_send_command_packet_now()) return; 2210 2211 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2212 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2213 2214 // send disconnected event right away - causes higher layer connections to get closed, too. 2215 hci_shutdown_connection(connection); 2216 return; 2217 } 2218 2219 if (hci_classic_supported()){ 2220 // disable page and inquiry scan 2221 if (!hci_can_send_command_packet_now()) return; 2222 2223 log_info("HCI_STATE_HALTING, disabling inq scans"); 2224 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2225 2226 // continue in next sub state 2227 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2228 break; 2229 } 2230 // fall through for ble-only chips 2231 2232 case HCI_FALLING_ASLEEP_COMPLETE: 2233 log_info("HCI_STATE_HALTING, calling sleep"); 2234 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2235 // don't actually go to sleep, if H4 supports power management 2236 if (bt_control_iphone_power_management_enabled()){ 2237 // SLEEP MODE reached 2238 hci_stack->state = HCI_STATE_SLEEPING; 2239 hci_emit_state(); 2240 break; 2241 } 2242 #endif 2243 // switch mode 2244 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2245 hci_emit_state(); 2246 break; 2247 2248 default: 2249 break; 2250 } 2251 break; 2252 2253 default: 2254 break; 2255 } 2256 } 2257 2258 int hci_send_cmd_packet(uint8_t *packet, int size){ 2259 bd_addr_t addr; 2260 hci_connection_t * conn; 2261 // house-keeping 2262 2263 // create_connection? 2264 if (IS_COMMAND(packet, hci_create_connection)){ 2265 bt_flip_addr(addr, &packet[3]); 2266 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2267 2268 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2269 if (!conn){ 2270 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2271 if (!conn){ 2272 // notify client that alloc failed 2273 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2274 return 0; // don't sent packet to controller 2275 } 2276 conn->state = SEND_CREATE_CONNECTION; 2277 } 2278 log_info("conn state %u", conn->state); 2279 switch (conn->state){ 2280 // if connection active exists 2281 case OPEN: 2282 // and OPEN, emit connection complete command, don't send to controller 2283 hci_emit_connection_complete(conn, 0); 2284 return 0; 2285 case SEND_CREATE_CONNECTION: 2286 // connection created by hci, e.g. dedicated bonding 2287 break; 2288 default: 2289 // otherwise, just ignore as it is already in the open process 2290 return 0; 2291 } 2292 conn->state = SENT_CREATE_CONNECTION; 2293 } 2294 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2295 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2296 } 2297 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2298 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2299 } 2300 2301 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2302 if (hci_stack->remote_device_db){ 2303 bt_flip_addr(addr, &packet[3]); 2304 hci_stack->remote_device_db->delete_link_key(addr); 2305 } 2306 } 2307 2308 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2309 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2310 bt_flip_addr(addr, &packet[3]); 2311 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2312 if (conn){ 2313 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2314 } 2315 } 2316 2317 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2318 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2319 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2320 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2321 bt_flip_addr(addr, &packet[3]); 2322 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2323 if (conn){ 2324 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2325 } 2326 } 2327 2328 #ifdef HAVE_BLE 2329 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2330 hci_stack->adv_addr_type = packet[8]; 2331 } 2332 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2333 bt_flip_addr(hci_stack->adv_address, &packet[3]); 2334 } 2335 #endif 2336 2337 hci_stack->num_cmd_packets--; 2338 2339 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2340 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2341 2342 // release packet buffer for synchronous transport implementations 2343 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 2344 hci_stack->hci_packet_buffer_reserved = 0; 2345 } 2346 2347 return err; 2348 } 2349 2350 // disconnect because of security block 2351 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 2352 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2353 if (!connection) return; 2354 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2355 } 2356 2357 2358 // Configure Secure Simple Pairing 2359 2360 // enable will enable SSP during init 2361 void hci_ssp_set_enable(int enable){ 2362 hci_stack->ssp_enable = enable; 2363 } 2364 2365 int hci_local_ssp_activated(){ 2366 return hci_ssp_supported() && hci_stack->ssp_enable; 2367 } 2368 2369 // if set, BTstack will respond to io capability request using authentication requirement 2370 void hci_ssp_set_io_capability(int io_capability){ 2371 hci_stack->ssp_io_capability = io_capability; 2372 } 2373 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 2374 hci_stack->ssp_authentication_requirement = authentication_requirement; 2375 } 2376 2377 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 2378 void hci_ssp_set_auto_accept(int auto_accept){ 2379 hci_stack->ssp_auto_accept = auto_accept; 2380 } 2381 2382 /** 2383 * pre: numcmds >= 0 - it's allowed to send a command to the controller 2384 */ 2385 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 2386 2387 if (!hci_can_send_command_packet_now()){ 2388 log_error("hci_send_cmd called but cannot send packet now"); 2389 return 0; 2390 } 2391 2392 // for HCI INITIALIZATION 2393 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 2394 hci_stack->last_cmd_opcode = cmd->opcode; 2395 2396 hci_reserve_packet_buffer(); 2397 uint8_t * packet = hci_stack->hci_packet_buffer; 2398 2399 va_list argptr; 2400 va_start(argptr, cmd); 2401 uint16_t size = hci_create_cmd_internal(packet, cmd, argptr); 2402 va_end(argptr); 2403 2404 return hci_send_cmd_packet(packet, size); 2405 } 2406 2407 // Create various non-HCI events. 2408 // TODO: generalize, use table similar to hci_create_command 2409 2410 void hci_emit_state(){ 2411 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 2412 uint8_t event[3]; 2413 event[0] = BTSTACK_EVENT_STATE; 2414 event[1] = sizeof(event) - 2; 2415 event[2] = hci_stack->state; 2416 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2417 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2418 } 2419 2420 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 2421 uint8_t event[13]; 2422 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 2423 event[1] = sizeof(event) - 2; 2424 event[2] = status; 2425 bt_store_16(event, 3, conn->con_handle); 2426 bt_flip_addr(&event[5], conn->address); 2427 event[11] = 1; // ACL connection 2428 event[12] = 0; // encryption disabled 2429 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2430 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2431 } 2432 2433 void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, uint16_t conn_handle, uint8_t status){ 2434 uint8_t event[21]; 2435 event[0] = HCI_EVENT_LE_META; 2436 event[1] = sizeof(event) - 2; 2437 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 2438 event[3] = status; 2439 bt_store_16(event, 4, conn_handle); 2440 event[6] = 0; // TODO: role 2441 event[7] = address_type; 2442 bt_flip_addr(&event[8], address); 2443 bt_store_16(event, 14, 0); // interval 2444 bt_store_16(event, 16, 0); // latency 2445 bt_store_16(event, 18, 0); // supervision timeout 2446 event[20] = 0; // master clock accuracy 2447 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2448 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2449 } 2450 2451 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 2452 uint8_t event[6]; 2453 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 2454 event[1] = sizeof(event) - 2; 2455 event[2] = 0; // status = OK 2456 bt_store_16(event, 3, handle); 2457 event[5] = reason; 2458 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2459 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2460 } 2461 2462 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 2463 if (disable_l2cap_timeouts) return; 2464 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 2465 uint8_t event[4]; 2466 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 2467 event[1] = sizeof(event) - 2; 2468 bt_store_16(event, 2, conn->con_handle); 2469 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2470 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2471 } 2472 2473 void hci_emit_nr_connections_changed(){ 2474 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 2475 uint8_t event[3]; 2476 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 2477 event[1] = sizeof(event) - 2; 2478 event[2] = nr_hci_connections(); 2479 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2480 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2481 } 2482 2483 void hci_emit_hci_open_failed(){ 2484 log_info("BTSTACK_EVENT_POWERON_FAILED"); 2485 uint8_t event[2]; 2486 event[0] = BTSTACK_EVENT_POWERON_FAILED; 2487 event[1] = sizeof(event) - 2; 2488 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2489 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2490 } 2491 2492 #ifndef EMBEDDED 2493 void hci_emit_btstack_version() { 2494 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 2495 uint8_t event[6]; 2496 event[0] = BTSTACK_EVENT_VERSION; 2497 event[1] = sizeof(event) - 2; 2498 event[2] = BTSTACK_MAJOR; 2499 event[3] = BTSTACK_MINOR; 2500 bt_store_16(event, 4, BTSTACK_REVISION); 2501 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2502 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2503 } 2504 #endif 2505 2506 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 2507 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 2508 uint8_t event[3]; 2509 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 2510 event[1] = sizeof(event) - 2; 2511 event[2] = enabled; 2512 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2513 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2514 } 2515 2516 void hci_emit_remote_name_cached(bd_addr_t addr, device_name_t *name){ 2517 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 2518 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 2519 event[1] = sizeof(event) - 2 - 1; 2520 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 2521 bt_flip_addr(&event[3], addr); 2522 memcpy(&event[9], name, 248); 2523 2524 event[9+248] = 0; // assert \0 for log_info 2525 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(addr), &event[9]); 2526 2527 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 2528 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 2529 } 2530 2531 void hci_emit_discoverable_enabled(uint8_t enabled){ 2532 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 2533 uint8_t event[3]; 2534 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 2535 event[1] = sizeof(event) - 2; 2536 event[2] = enabled; 2537 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2538 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2539 } 2540 2541 void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 2542 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 2543 uint8_t event[5]; 2544 int pos = 0; 2545 event[pos++] = GAP_SECURITY_LEVEL; 2546 event[pos++] = sizeof(event) - 2; 2547 bt_store_16(event, 2, con_handle); 2548 pos += 2; 2549 event[pos++] = level; 2550 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2551 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2552 } 2553 2554 void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 2555 log_info("hci_emit_dedicated_bonding_result %u ", status); 2556 uint8_t event[9]; 2557 int pos = 0; 2558 event[pos++] = GAP_DEDICATED_BONDING_COMPLETED; 2559 event[pos++] = sizeof(event) - 2; 2560 event[pos++] = status; 2561 bt_flip_addr( &event[pos], address); 2562 pos += 6; 2563 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2564 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2565 } 2566 2567 // query if remote side supports SSP 2568 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 2569 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2570 if (!connection) return 0; 2571 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 2572 } 2573 2574 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 2575 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 2576 } 2577 2578 // GAP API 2579 /** 2580 * @bbrief enable/disable bonding. default is enabled 2581 * @praram enabled 2582 */ 2583 void gap_set_bondable_mode(int enable){ 2584 hci_stack->bondable = enable ? 1 : 0; 2585 } 2586 2587 /** 2588 * @brief map link keys to security levels 2589 */ 2590 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 2591 switch (link_key_type){ 2592 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 2593 return LEVEL_4; 2594 case COMBINATION_KEY: 2595 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 2596 return LEVEL_3; 2597 default: 2598 return LEVEL_2; 2599 } 2600 } 2601 2602 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 2603 if (!connection) return LEVEL_0; 2604 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 2605 return gap_security_level_for_link_key_type(connection->link_key_type); 2606 } 2607 2608 2609 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 2610 log_info("gap_mitm_protection_required_for_security_level %u", level); 2611 return level > LEVEL_2; 2612 } 2613 2614 /** 2615 * @brief get current security level 2616 */ 2617 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 2618 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2619 if (!connection) return LEVEL_0; 2620 return gap_security_level_for_connection(connection); 2621 } 2622 2623 /** 2624 * @brief request connection to device to 2625 * @result GAP_AUTHENTICATION_RESULT 2626 */ 2627 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 2628 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2629 if (!connection){ 2630 hci_emit_security_level(con_handle, LEVEL_0); 2631 return; 2632 } 2633 gap_security_level_t current_level = gap_security_level(con_handle); 2634 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 2635 if (current_level >= requested_level){ 2636 hci_emit_security_level(con_handle, current_level); 2637 return; 2638 } 2639 2640 connection->requested_security_level = requested_level; 2641 2642 #if 0 2643 // sending encryption request without a link key results in an error. 2644 // TODO: figure out how to use it properly 2645 2646 // would enabling ecnryption suffice (>= LEVEL_2)? 2647 if (hci_stack->remote_device_db){ 2648 link_key_type_t link_key_type; 2649 link_key_t link_key; 2650 if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 2651 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 2652 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2653 return; 2654 } 2655 } 2656 } 2657 #endif 2658 2659 // try to authenticate connection 2660 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2661 hci_run(); 2662 } 2663 2664 /** 2665 * @brief start dedicated bonding with device. disconnect after bonding 2666 * @param device 2667 * @param request MITM protection 2668 * @result GAP_DEDICATED_BONDING_COMPLETE 2669 */ 2670 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 2671 2672 // create connection state machine 2673 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 2674 2675 if (!connection){ 2676 return BTSTACK_MEMORY_ALLOC_FAILED; 2677 } 2678 2679 // delete linkn key 2680 hci_drop_link_key_for_bd_addr(device); 2681 2682 // configure LEVEL_2/3, dedicated bonding 2683 connection->state = SEND_CREATE_CONNECTION; 2684 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 2685 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 2686 connection->bonding_flags = BONDING_DEDICATED; 2687 2688 // wait for GAP Security Result and send GAP Dedicated Bonding complete 2689 2690 // handle: connnection failure (connection complete != ok) 2691 // handle: authentication failure 2692 // handle: disconnect on done 2693 2694 hci_run(); 2695 2696 return 0; 2697 } 2698 2699 void gap_set_local_name(const char * local_name){ 2700 hci_stack->local_name = local_name; 2701 } 2702 2703 le_command_status_t le_central_start_scan(){ 2704 if (hci_stack->le_scanning_state == LE_SCANNING) return BLE_PERIPHERAL_OK; 2705 hci_stack->le_scanning_state = LE_START_SCAN; 2706 hci_run(); 2707 return BLE_PERIPHERAL_OK; 2708 } 2709 2710 le_command_status_t le_central_stop_scan(){ 2711 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return BLE_PERIPHERAL_OK; 2712 hci_stack->le_scanning_state = LE_STOP_SCAN; 2713 hci_run(); 2714 return BLE_PERIPHERAL_OK; 2715 } 2716 2717 void le_central_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 2718 hci_stack->le_scan_type = scan_type; 2719 hci_stack->le_scan_interval = scan_interval; 2720 hci_stack->le_scan_window = scan_window; 2721 hci_run(); 2722 } 2723 2724 le_command_status_t le_central_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 2725 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2726 if (!conn){ 2727 log_info("le_central_connect: no connection exists yet, creating context"); 2728 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2729 if (!conn){ 2730 // notify client that alloc failed 2731 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 2732 log_info("le_central_connect: failed to alloc hci_connection_t"); 2733 return BLE_PERIPHERAL_NOT_CONNECTED; // don't sent packet to controller 2734 } 2735 conn->state = SEND_CREATE_CONNECTION; 2736 log_info("le_central_connect: send create connection next"); 2737 hci_run(); 2738 return BLE_PERIPHERAL_OK; 2739 } 2740 2741 if (!hci_is_le_connection(conn) || 2742 conn->state == SEND_CREATE_CONNECTION || 2743 conn->state == SENT_CREATE_CONNECTION) { 2744 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 2745 log_error("le_central_connect: classic connection or connect is already being created"); 2746 return BLE_PERIPHERAL_IN_WRONG_STATE; 2747 } 2748 2749 log_info("le_central_connect: context exists with state %u", conn->state); 2750 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 2751 hci_run(); 2752 return BLE_PERIPHERAL_OK; 2753 } 2754 2755 // @assumption: only a single outgoing LE Connection exists 2756 static hci_connection_t * le_central_get_outgoing_connection(){ 2757 linked_item_t *it; 2758 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 2759 hci_connection_t * conn = (hci_connection_t *) it; 2760 if (!hci_is_le_connection(conn)) continue; 2761 switch (conn->state){ 2762 case SEND_CREATE_CONNECTION: 2763 case SENT_CREATE_CONNECTION: 2764 return conn; 2765 default: 2766 break; 2767 }; 2768 } 2769 return NULL; 2770 } 2771 2772 le_command_status_t le_central_connect_cancel(){ 2773 hci_connection_t * conn = le_central_get_outgoing_connection(); 2774 switch (conn->state){ 2775 case SEND_CREATE_CONNECTION: 2776 // skip sending create connection and emit event instead 2777 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 2778 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 2779 btstack_memory_hci_connection_free( conn ); 2780 break; 2781 case SENT_CREATE_CONNECTION: 2782 // request to send cancel connection 2783 conn->state = SEND_CANCEL_CONNECTION; 2784 hci_run(); 2785 break; 2786 default: 2787 break; 2788 } 2789 return BLE_PERIPHERAL_OK; 2790 } 2791 2792 /** 2793 * @brief Updates the connection parameters for a given LE connection 2794 * @param handle 2795 * @param conn_interval_min (unit: 1.25ms) 2796 * @param conn_interval_max (unit: 1.25ms) 2797 * @param conn_latency 2798 * @param supervision_timeout (unit: 10ms) 2799 * @returns 0 if ok 2800 */ 2801 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 2802 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 2803 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2804 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2805 connection->le_conn_interval_min = conn_interval_min; 2806 connection->le_conn_interval_max = conn_interval_max; 2807 connection->le_conn_latency = conn_latency; 2808 connection->le_supervision_timeout = supervision_timeout; 2809 return 0; 2810 } 2811 2812 le_command_status_t gap_disconnect(hci_con_handle_t handle){ 2813 hci_connection_t * conn = hci_connection_for_handle(handle); 2814 if (!conn){ 2815 hci_emit_disconnection_complete(handle, 0); 2816 return BLE_PERIPHERAL_OK; 2817 } 2818 conn->state = SEND_DISCONNECT; 2819 hci_run(); 2820 return BLE_PERIPHERAL_OK; 2821 } 2822 2823 void hci_disconnect_all(){ 2824 linked_list_iterator_t it; 2825 linked_list_iterator_init(&it, &hci_stack->connections); 2826 while (linked_list_iterator_has_next(&it)){ 2827 hci_connection_t * con = (hci_connection_t*) linked_list_iterator_next(&it); 2828 if (con->state == SENT_DISCONNECT) continue; 2829 con->state = SEND_DISCONNECT; 2830 } 2831 hci_run(); 2832 } 2833