1 /* 2 * Copyright (C) 2009 by Matthias Ringwald 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 * 17 * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 20 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 21 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 24 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 27 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 */ 31 32 /* 33 * hci.c 34 * 35 * Created by Matthias Ringwald on 4/29/09. 36 * 37 */ 38 39 #include "config.h" 40 41 #include "hci.h" 42 43 #include <stdarg.h> 44 #include <string.h> 45 #include <stdio.h> 46 47 #ifndef EMBEDDED 48 #include <unistd.h> // gethostbyname 49 #include <btstack/version.h> 50 #endif 51 52 #include "btstack_memory.h" 53 #include "debug.h" 54 #include "hci_dump.h" 55 56 #include <btstack/hci_cmds.h> 57 58 #define HCI_CONNECTION_TIMEOUT_MS 10000 59 60 #ifdef USE_BLUETOOL 61 #include "bt_control_iphone.h" 62 #endif 63 64 // the STACK is here 65 static hci_stack_t hci_stack; 66 67 /** 68 * get connection for a given handle 69 * 70 * @return connection OR NULL, if not found 71 */ 72 hci_connection_t * connection_for_handle(hci_con_handle_t con_handle){ 73 linked_item_t *it; 74 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 75 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 76 return (hci_connection_t *) it; 77 } 78 } 79 return NULL; 80 } 81 82 static void hci_connection_timeout_handler(timer_source_t *timer){ 83 hci_connection_t * connection = linked_item_get_user(&timer->item); 84 #ifdef HAVE_TIME 85 struct timeval tv; 86 gettimeofday(&tv, NULL); 87 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 88 // connections might be timed out 89 hci_emit_l2cap_check_timeout(connection); 90 } 91 #endif 92 #ifdef HAVE_TICK 93 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 94 // connections might be timed out 95 hci_emit_l2cap_check_timeout(connection); 96 } 97 #endif 98 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 99 run_loop_add_timer(timer); 100 } 101 102 static void hci_connection_timestamp(hci_connection_t *connection){ 103 #ifdef HAVE_TIME 104 gettimeofday(&connection->timestamp, NULL); 105 #endif 106 #ifdef HAVE_TICK 107 connection->timestamp = embedded_get_ticks(); 108 #endif 109 } 110 111 /** 112 * create connection for given address 113 * 114 * @return connection OR NULL, if no memory left 115 */ 116 static hci_connection_t * create_connection_for_addr(bd_addr_t addr){ 117 hci_connection_t * conn = btstack_memory_hci_connection_get(); 118 if (!conn) return NULL; 119 BD_ADDR_COPY(conn->address, addr); 120 conn->con_handle = 0xffff; 121 conn->authentication_flags = AUTH_FLAGS_NONE; 122 linked_item_set_user(&conn->timeout.item, conn); 123 conn->timeout.process = hci_connection_timeout_handler; 124 hci_connection_timestamp(conn); 125 conn->acl_recombination_length = 0; 126 conn->acl_recombination_pos = 0; 127 conn->num_acl_packets_sent = 0; 128 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 129 return conn; 130 } 131 132 /** 133 * get connection for given address 134 * 135 * @return connection OR NULL, if not found 136 */ 137 static hci_connection_t * connection_for_address(bd_addr_t address){ 138 linked_item_t *it; 139 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 140 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 141 return (hci_connection_t *) it; 142 } 143 } 144 return NULL; 145 } 146 147 /** 148 * add authentication flags and reset timer 149 */ 150 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 151 bd_addr_t addr; 152 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 153 hci_connection_t * conn = connection_for_address(addr); 154 if (conn) { 155 conn->authentication_flags |= flags; 156 hci_connection_timestamp(conn); 157 } 158 } 159 160 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 161 hci_connection_t * conn = connection_for_handle(handle); 162 if (!conn) return 0; 163 if (!conn->authentication_flags) return 0; 164 if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0; 165 if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0; 166 return 1; 167 } 168 169 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 170 if (hci_stack.remote_device_db) { 171 hci_stack.remote_device_db->delete_link_key(addr); 172 } 173 } 174 175 176 /** 177 * count connections 178 */ 179 static int nr_hci_connections(void){ 180 int count = 0; 181 linked_item_t *it; 182 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 183 return count; 184 } 185 186 /** 187 * Dummy handler called by HCI 188 */ 189 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 190 } 191 192 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 193 hci_connection_t * connection = connection_for_handle(handle); 194 if (!connection) { 195 log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 196 return 0; 197 } 198 return connection->num_acl_packets_sent; 199 } 200 201 uint8_t hci_number_free_acl_slots(){ 202 uint8_t free_slots = hci_stack.total_num_acl_packets; 203 linked_item_t *it; 204 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 205 hci_connection_t * connection = (hci_connection_t *) it; 206 if (free_slots < connection->num_acl_packets_sent) { 207 log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 208 return 0; 209 } 210 free_slots -= connection->num_acl_packets_sent; 211 } 212 return free_slots; 213 } 214 215 int hci_can_send_packet_now(uint8_t packet_type){ 216 217 // check for async hci transport implementations 218 if (hci_stack.hci_transport->can_send_packet_now){ 219 if (!hci_stack.hci_transport->can_send_packet_now(packet_type)){ 220 return 0; 221 } 222 } 223 224 // check regular Bluetooth flow control 225 switch (packet_type) { 226 case HCI_ACL_DATA_PACKET: 227 return hci_number_free_acl_slots(); 228 case HCI_COMMAND_DATA_PACKET: 229 return hci_stack.num_cmd_packets; 230 default: 231 return 0; 232 } 233 } 234 235 int hci_send_acl_packet(uint8_t *packet, int size){ 236 237 // check for free places on BT module 238 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 239 240 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 241 hci_connection_t *connection = connection_for_handle( con_handle); 242 if (!connection) return 0; 243 hci_connection_timestamp(connection); 244 245 // count packet 246 connection->num_acl_packets_sent++; 247 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 248 249 // send packet 250 int err = hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 251 252 return err; 253 } 254 255 static void acl_handler(uint8_t *packet, int size){ 256 257 // get info 258 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 259 hci_connection_t *conn = connection_for_handle(con_handle); 260 uint8_t acl_flags = READ_ACL_FLAGS(packet); 261 uint16_t acl_length = READ_ACL_LENGTH(packet); 262 263 // ignore non-registered handle 264 if (!conn){ 265 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 266 return; 267 } 268 269 // update idle timestamp 270 hci_connection_timestamp(conn); 271 272 // handle different packet types 273 switch (acl_flags & 0x03) { 274 275 case 0x01: // continuation fragment 276 277 // sanity check 278 if (conn->acl_recombination_pos == 0) { 279 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 280 return; 281 } 282 283 // append fragment payload (header already stored) 284 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 285 conn->acl_recombination_pos += acl_length; 286 287 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 288 // conn->acl_recombination_pos, conn->acl_recombination_length); 289 290 // forward complete L2CAP packet if complete. 291 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 292 293 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 294 // reset recombination buffer 295 conn->acl_recombination_length = 0; 296 conn->acl_recombination_pos = 0; 297 } 298 break; 299 300 case 0x02: { // first fragment 301 302 // sanity check 303 if (conn->acl_recombination_pos) { 304 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 305 return; 306 } 307 308 // peek into L2CAP packet! 309 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 310 311 // log_error( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 312 313 // compare fragment size to L2CAP packet size 314 if (acl_length >= l2cap_length + 4){ 315 316 // forward fragment as L2CAP packet 317 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 318 319 } else { 320 // store first fragment and tweak acl length for complete package 321 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 322 conn->acl_recombination_pos = acl_length + 4; 323 conn->acl_recombination_length = l2cap_length; 324 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 325 } 326 break; 327 328 } 329 default: 330 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 331 return; 332 } 333 334 // execute main loop 335 hci_run(); 336 } 337 338 static void hci_shutdown_connection(hci_connection_t *conn){ 339 log_info("Connection closed: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 340 341 // cancel all l2cap connections 342 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 343 344 run_loop_remove_timer(&conn->timeout); 345 346 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 347 btstack_memory_hci_connection_free( conn ); 348 349 // now it's gone 350 hci_emit_nr_connections_changed(); 351 } 352 353 static const uint16_t packet_type_sizes[] = { 354 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 355 HCI_ACL_DH1_SIZE, 0, 0, 0, 356 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 357 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 358 }; 359 360 static uint16_t hci_acl_packet_types_for_buffer_size(uint16_t buffer_size){ 361 uint16_t packet_types = 0; 362 int i; 363 for (i=0;i<16;i++){ 364 if (packet_type_sizes[i] == 0) continue; 365 if (packet_type_sizes[i] <= buffer_size){ 366 packet_types |= 1 << i; 367 } 368 } 369 // flip bits for "may not be used" 370 packet_types ^= 0x3306; 371 return packet_types; 372 } 373 374 uint16_t hci_usable_acl_packet_types(void){ 375 return hci_stack.packet_types; 376 } 377 378 uint8_t* hci_get_outgoing_acl_packet_buffer(void){ 379 // hci packet buffer is >= acl data packet length 380 return hci_stack.hci_packet_buffer; 381 } 382 383 uint16_t hci_max_acl_data_packet_length(){ 384 return hci_stack.acl_data_packet_length; 385 } 386 387 // avoid huge local variables 388 #ifndef EMBEDDED 389 static device_name_t device_name; 390 #endif 391 static void event_handler(uint8_t *packet, int size){ 392 bd_addr_t addr; 393 uint8_t link_type; 394 hci_con_handle_t handle; 395 hci_connection_t * conn; 396 int i; 397 398 switch (packet[0]) { 399 400 case HCI_EVENT_COMMAND_COMPLETE: 401 // get num cmd packets 402 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]); 403 hci_stack.num_cmd_packets = packet[2]; 404 405 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 406 // from offset 5 407 // status 408 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 409 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 410 // ignore: SCO data packet len (8) 411 hci_stack.total_num_acl_packets = packet[9]; 412 // ignore: total num SCO packets 413 if (hci_stack.state == HCI_STATE_INITIALIZING){ 414 // determine usable ACL payload size 415 if (HCI_ACL_PAYLOAD_SIZE < hci_stack.acl_data_packet_length){ 416 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 417 } 418 // determine usable ACL packet types 419 hci_stack.packet_types = hci_acl_packet_types_for_buffer_size(hci_stack.acl_data_packet_length); 420 421 log_error("hci_read_buffer_size: used size %u, count %u, packet types %04x\n", 422 hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets, hci_stack.packet_types); 423 } 424 } 425 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 426 hci_emit_discoverable_enabled(hci_stack.discoverable); 427 } 428 break; 429 430 case HCI_EVENT_COMMAND_STATUS: 431 // get num cmd packets 432 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]); 433 hci_stack.num_cmd_packets = packet[3]; 434 break; 435 436 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 437 for (i=0; i<packet[2];i++){ 438 handle = READ_BT_16(packet, 3 + 2*i); 439 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 440 conn = connection_for_handle(handle); 441 if (!conn){ 442 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 443 continue; 444 } 445 conn->num_acl_packets_sent -= num_packets; 446 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 447 } 448 break; 449 450 case HCI_EVENT_CONNECTION_REQUEST: 451 bt_flip_addr(addr, &packet[2]); 452 // TODO: eval COD 8-10 453 link_type = packet[11]; 454 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 455 if (link_type == 1) { // ACL 456 conn = connection_for_address(addr); 457 if (!conn) { 458 conn = create_connection_for_addr(addr); 459 } 460 if (!conn) { 461 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 462 hci_stack.decline_reason = 0x0d; 463 BD_ADDR_COPY(hci_stack.decline_addr, addr); 464 break; 465 } 466 conn->state = RECEIVED_CONNECTION_REQUEST; 467 hci_run(); 468 } else { 469 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 470 hci_stack.decline_reason = 0x0a; 471 BD_ADDR_COPY(hci_stack.decline_addr, addr); 472 } 473 break; 474 475 case HCI_EVENT_CONNECTION_COMPLETE: 476 // Connection management 477 bt_flip_addr(addr, &packet[5]); 478 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 479 conn = connection_for_address(addr); 480 if (conn) { 481 if (!packet[2]){ 482 conn->state = OPEN; 483 conn->con_handle = READ_BT_16(packet, 3); 484 485 // restart timer 486 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 487 run_loop_add_timer(&conn->timeout); 488 489 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 490 491 hci_emit_nr_connections_changed(); 492 } else { 493 // connection failed, remove entry 494 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 495 btstack_memory_hci_connection_free( conn ); 496 497 // if authentication error, also delete link key 498 if (packet[2] == 0x05) { 499 hci_drop_link_key_for_bd_addr(&addr); 500 } 501 } 502 } 503 break; 504 505 case HCI_EVENT_LINK_KEY_REQUEST: 506 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 507 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 508 if (!hci_stack.remote_device_db) break; 509 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 510 hci_run(); 511 // request already answered 512 return; 513 514 case HCI_EVENT_LINK_KEY_NOTIFICATION: 515 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 516 if (!hci_stack.remote_device_db) break; 517 bt_flip_addr(addr, &packet[2]); 518 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 519 // still forward event to allow dismiss of pairing dialog 520 break; 521 522 case HCI_EVENT_PIN_CODE_REQUEST: 523 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 524 break; 525 526 #ifndef EMBEDDED 527 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 528 if (!hci_stack.remote_device_db) break; 529 if (packet[2]) break; // status not ok 530 bt_flip_addr(addr, &packet[3]); 531 // fix for invalid remote names - terminate on 0xff 532 for (i=0; i<248;i++){ 533 if (packet[9+i] == 0xff){ 534 packet[9+i] = 0; 535 break; 536 } 537 } 538 memset(&device_name, 0, sizeof(device_name_t)); 539 strncpy((char*) device_name, (char*) &packet[9], 248); 540 hci_stack.remote_device_db->put_name(&addr, &device_name); 541 break; 542 543 case HCI_EVENT_INQUIRY_RESULT: 544 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 545 if (!hci_stack.remote_device_db) break; 546 // first send inq result packet 547 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 548 // then send cached remote names 549 for (i=0; i<packet[2];i++){ 550 bt_flip_addr(addr, &packet[3+i*6]); 551 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 552 hci_emit_remote_name_cached(&addr, &device_name); 553 } 554 } 555 return; 556 #endif 557 558 case HCI_EVENT_DISCONNECTION_COMPLETE: 559 if (!packet[2]){ 560 handle = READ_BT_16(packet, 3); 561 hci_connection_t * conn = connection_for_handle(handle); 562 if (conn) { 563 hci_shutdown_connection(conn); 564 } 565 } 566 break; 567 568 case HCI_EVENT_HARDWARE_ERROR: 569 if(hci_stack.control->hw_error){ 570 (*hci_stack.control->hw_error)(); 571 } 572 break; 573 574 default: 575 break; 576 } 577 578 // handle BT initialization 579 if (hci_stack.state == HCI_STATE_INITIALIZING){ 580 // handle H4 synchronization loss on restart 581 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 582 // hci_stack.substate = 0; 583 // } 584 // handle normal init sequence 585 if (hci_stack.substate % 2){ 586 // odd: waiting for event 587 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 588 hci_stack.substate++; 589 } 590 } 591 } 592 593 // help with BT sleep 594 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 595 && hci_stack.substate == 1 596 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 597 hci_stack.substate++; 598 } 599 600 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 601 602 // execute main loop 603 hci_run(); 604 } 605 606 void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 607 switch (packet_type) { 608 case HCI_EVENT_PACKET: 609 event_handler(packet, size); 610 break; 611 case HCI_ACL_DATA_PACKET: 612 acl_handler(packet, size); 613 break; 614 default: 615 break; 616 } 617 } 618 619 /** Register HCI packet handlers */ 620 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 621 hci_stack.packet_handler = handler; 622 } 623 624 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t * remote_device_db){ 625 626 // reference to use transport layer implementation 627 hci_stack.hci_transport = transport; 628 629 // references to used control implementation 630 hci_stack.control = control; 631 632 // reference to used config 633 hci_stack.config = config; 634 635 // no connections yet 636 hci_stack.connections = NULL; 637 hci_stack.discoverable = 0; 638 639 // no pending cmds 640 hci_stack.decline_reason = 0; 641 hci_stack.new_scan_enable_value = 0xff; 642 643 // higher level handler 644 hci_stack.packet_handler = dummy_handler; 645 646 // store and open remote device db 647 hci_stack.remote_device_db = remote_device_db; 648 if (hci_stack.remote_device_db) { 649 hci_stack.remote_device_db->open(); 650 } 651 652 // max acl payload size defined in config.h 653 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 654 655 // register packet handlers with transport 656 transport->register_packet_handler(&packet_handler); 657 } 658 659 void hci_close(){ 660 // close remote device db 661 if (hci_stack.remote_device_db) { 662 hci_stack.remote_device_db->close(); 663 } 664 } 665 666 // State-Module-Driver overview 667 // state module low-level 668 // HCI_STATE_OFF off close 669 // HCI_STATE_INITIALIZING, on open 670 // HCI_STATE_WORKING, on open 671 // HCI_STATE_HALTING, on open 672 // HCI_STATE_SLEEPING, off/sleep close 673 // HCI_STATE_FALLING_ASLEEP on open 674 675 static int hci_power_control_on(void){ 676 677 // power on 678 int err = 0; 679 if (hci_stack.control && hci_stack.control->on){ 680 err = (*hci_stack.control->on)(hci_stack.config); 681 } 682 if (err){ 683 log_error( "POWER_ON failed\n"); 684 hci_emit_hci_open_failed(); 685 return err; 686 } 687 688 // open low-level device 689 err = hci_stack.hci_transport->open(hci_stack.config); 690 if (err){ 691 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 692 if (hci_stack.control && hci_stack.control->off){ 693 (*hci_stack.control->off)(hci_stack.config); 694 } 695 hci_emit_hci_open_failed(); 696 return err; 697 } 698 return 0; 699 } 700 701 static void hci_power_control_off(void){ 702 703 log_info("hci_power_control_off\n"); 704 705 // close low-level device 706 hci_stack.hci_transport->close(hci_stack.config); 707 708 log_info("hci_power_control_off - hci_transport closed\n"); 709 710 // power off 711 if (hci_stack.control && hci_stack.control->off){ 712 (*hci_stack.control->off)(hci_stack.config); 713 } 714 715 log_info("hci_power_control_off - control closed\n"); 716 717 hci_stack.state = HCI_STATE_OFF; 718 } 719 720 static void hci_power_control_sleep(void){ 721 722 log_info("hci_power_control_sleep\n"); 723 724 #if 0 725 // don't close serial port during sleep 726 727 // close low-level device 728 hci_stack.hci_transport->close(hci_stack.config); 729 #endif 730 731 // sleep mode 732 if (hci_stack.control && hci_stack.control->sleep){ 733 (*hci_stack.control->sleep)(hci_stack.config); 734 } 735 736 hci_stack.state = HCI_STATE_SLEEPING; 737 } 738 739 static int hci_power_control_wake(void){ 740 741 log_info("hci_power_control_wake\n"); 742 743 // wake on 744 if (hci_stack.control && hci_stack.control->wake){ 745 (*hci_stack.control->wake)(hci_stack.config); 746 } 747 748 #if 0 749 // open low-level device 750 int err = hci_stack.hci_transport->open(hci_stack.config); 751 if (err){ 752 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 753 if (hci_stack.control && hci_stack.control->off){ 754 (*hci_stack.control->off)(hci_stack.config); 755 } 756 hci_emit_hci_open_failed(); 757 return err; 758 } 759 #endif 760 761 return 0; 762 } 763 764 765 int hci_power_control(HCI_POWER_MODE power_mode){ 766 767 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 768 769 int err = 0; 770 switch (hci_stack.state){ 771 772 case HCI_STATE_OFF: 773 switch (power_mode){ 774 case HCI_POWER_ON: 775 err = hci_power_control_on(); 776 if (err) return err; 777 // set up state machine 778 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 779 hci_stack.state = HCI_STATE_INITIALIZING; 780 hci_stack.substate = 0; 781 break; 782 case HCI_POWER_OFF: 783 // do nothing 784 break; 785 case HCI_POWER_SLEEP: 786 // do nothing (with SLEEP == OFF) 787 break; 788 } 789 break; 790 791 case HCI_STATE_INITIALIZING: 792 switch (power_mode){ 793 case HCI_POWER_ON: 794 // do nothing 795 break; 796 case HCI_POWER_OFF: 797 // no connections yet, just turn it off 798 hci_power_control_off(); 799 break; 800 case HCI_POWER_SLEEP: 801 // no connections yet, just turn it off 802 hci_power_control_sleep(); 803 break; 804 } 805 break; 806 807 case HCI_STATE_WORKING: 808 switch (power_mode){ 809 case HCI_POWER_ON: 810 // do nothing 811 break; 812 case HCI_POWER_OFF: 813 // see hci_run 814 hci_stack.state = HCI_STATE_HALTING; 815 break; 816 case HCI_POWER_SLEEP: 817 // see hci_run 818 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 819 hci_stack.substate = 0; 820 break; 821 } 822 break; 823 824 case HCI_STATE_HALTING: 825 switch (power_mode){ 826 case HCI_POWER_ON: 827 // set up state machine 828 hci_stack.state = HCI_STATE_INITIALIZING; 829 hci_stack.substate = 0; 830 break; 831 case HCI_POWER_OFF: 832 // do nothing 833 break; 834 case HCI_POWER_SLEEP: 835 // see hci_run 836 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 837 hci_stack.substate = 0; 838 break; 839 } 840 break; 841 842 case HCI_STATE_FALLING_ASLEEP: 843 switch (power_mode){ 844 case HCI_POWER_ON: 845 846 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 847 // nothing to do, if H4 supports power management 848 if (bt_control_iphone_power_management_enabled()){ 849 hci_stack.state = HCI_STATE_INITIALIZING; 850 hci_stack.substate = 6; 851 break; 852 } 853 #endif 854 // set up state machine 855 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 856 hci_stack.state = HCI_STATE_INITIALIZING; 857 hci_stack.substate = 0; 858 break; 859 case HCI_POWER_OFF: 860 // see hci_run 861 hci_stack.state = HCI_STATE_HALTING; 862 break; 863 case HCI_POWER_SLEEP: 864 // do nothing 865 break; 866 } 867 break; 868 869 case HCI_STATE_SLEEPING: 870 switch (power_mode){ 871 case HCI_POWER_ON: 872 873 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 874 // nothing to do, if H4 supports power management 875 if (bt_control_iphone_power_management_enabled()){ 876 hci_stack.state = HCI_STATE_INITIALIZING; 877 hci_stack.substate = 6; 878 break; 879 } 880 #endif 881 err = hci_power_control_wake(); 882 if (err) return err; 883 // set up state machine 884 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 885 hci_stack.state = HCI_STATE_INITIALIZING; 886 hci_stack.substate = 0; 887 break; 888 case HCI_POWER_OFF: 889 hci_stack.state = HCI_STATE_HALTING; 890 break; 891 case HCI_POWER_SLEEP: 892 // do nothing 893 break; 894 } 895 break; 896 } 897 898 // create internal event 899 hci_emit_state(); 900 901 // trigger next/first action 902 hci_run(); 903 904 return 0; 905 } 906 907 void hci_discoverable_control(uint8_t enable){ 908 if (enable) enable = 1; // normalize argument 909 910 if (hci_stack.discoverable == enable){ 911 hci_emit_discoverable_enabled(hci_stack.discoverable); 912 return; 913 } 914 915 // store request to send command but accept in higher layer view 916 hci_stack.new_scan_enable_value = 2 | enable; // 1 = inq scan, 2 = page scan 917 hci_stack.discoverable = enable; 918 919 hci_run(); 920 } 921 922 void hci_run(){ 923 924 hci_connection_t * connection; 925 linked_item_t * it; 926 927 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 928 929 // global/non-connection oriented commands 930 931 // decline incoming connections 932 if (hci_stack.decline_reason){ 933 uint8_t reason = hci_stack.decline_reason; 934 hci_stack.decline_reason = 0; 935 hci_send_cmd(&hci_reject_connection_request, hci_stack.decline_addr, reason); 936 } 937 938 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 939 940 // send scan enable 941 if (hci_stack.new_scan_enable_value != 0xff){ 942 hci_send_cmd(&hci_write_scan_enable, hci_stack.new_scan_enable_value); 943 hci_stack.new_scan_enable_value = 0xff; 944 } 945 946 // send pending HCI commands 947 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 948 949 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 950 951 connection = (hci_connection_t *) it; 952 953 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 954 log_info("sending hci_accept_connection_request\n"); 955 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 956 connection->state = ACCEPTED_CONNECTION_REQUEST; 957 } 958 959 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 960 961 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 962 link_key_t link_key; 963 log_info("responding to link key request\n"); 964 if ( hci_stack.remote_device_db->get_link_key( &connection->address, &link_key)){ 965 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 966 } else { 967 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 968 } 969 connection->authentication_flags &= ~HANDLE_LINK_KEY_REQUEST; 970 } 971 } 972 973 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 974 975 switch (hci_stack.state){ 976 case HCI_STATE_INITIALIZING: 977 // log_info("hci_init: substate %u\n", hci_stack.substate); 978 if (hci_stack.substate % 2) { 979 // odd: waiting for command completion 980 return; 981 } 982 switch (hci_stack.substate >> 1){ 983 case 0: // RESET 984 hci_send_cmd(&hci_reset); 985 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 986 // skip baud change 987 hci_stack.substate = 4; // >> 1 = 2 988 } 989 break; 990 case 1: // SEND BAUD CHANGE 991 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_packet_buffer); 992 hci_send_cmd_packet(hci_stack.hci_packet_buffer, 3 + hci_stack.hci_packet_buffer[2]); 993 break; 994 case 2: // LOCAL BAUD CHANGE 995 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 996 hci_stack.substate += 2; 997 // break missing here for fall through 998 999 case 3: 1000 // custom initialization 1001 if (hci_stack.control && hci_stack.control->next_cmd){ 1002 int valid_cmd = (*hci_stack.control->next_cmd)(hci_stack.config, hci_stack.hci_packet_buffer); 1003 if (valid_cmd){ 1004 int size = 3 + hci_stack.hci_packet_buffer[2]; 1005 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack.hci_packet_buffer, size); 1006 hci_stack.substate = 4; // more init commands 1007 break; 1008 } 1009 log_info("hci_run: init script done\n\r"); 1010 } 1011 // otherwise continue 1012 hci_send_cmd(&hci_read_bd_addr); 1013 break; 1014 case 4: 1015 hci_send_cmd(&hci_read_buffer_size); 1016 break; 1017 case 5: 1018 // ca. 15 sec 1019 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1020 break; 1021 case 6: 1022 hci_send_cmd(&hci_write_scan_enable, 2 | hci_stack.discoverable); // page scan 1023 break; 1024 case 7: 1025 #ifndef EMBEDDED 1026 { 1027 char hostname[30]; 1028 gethostname(hostname, 30); 1029 hostname[29] = '\0'; 1030 hci_send_cmd(&hci_write_local_name, hostname); 1031 break; 1032 } 1033 case 8: 1034 #ifdef USE_BLUETOOL 1035 hci_send_cmd(&hci_write_class_of_device, 0x007a020c); // Smartphone 1036 break; 1037 1038 case 9: 1039 #endif 1040 #endif 1041 // done. 1042 hci_stack.state = HCI_STATE_WORKING; 1043 hci_emit_state(); 1044 break; 1045 default: 1046 break; 1047 } 1048 hci_stack.substate++; 1049 break; 1050 1051 case HCI_STATE_HALTING: 1052 1053 log_info("HCI_STATE_HALTING\n"); 1054 // close all open connections 1055 connection = (hci_connection_t *) hci_stack.connections; 1056 if (connection){ 1057 1058 // send disconnect 1059 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1060 1061 log_info("HCI_STATE_HALTING, connection %lu, handle %u\n", (uintptr_t) connection, (uint16_t)connection->con_handle); 1062 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1063 1064 // send disconnected event right away - causes higher layer connections to get closed, too. 1065 hci_shutdown_connection(connection); 1066 return; 1067 } 1068 log_info("HCI_STATE_HALTING, calling off\n"); 1069 1070 // switch mode 1071 hci_power_control_off(); 1072 1073 log_info("HCI_STATE_HALTING, emitting state\n"); 1074 hci_emit_state(); 1075 log_info("HCI_STATE_HALTING, done\n"); 1076 break; 1077 1078 case HCI_STATE_FALLING_ASLEEP: 1079 switch(hci_stack.substate) { 1080 case 0: 1081 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1082 // close all open connections 1083 connection = (hci_connection_t *) hci_stack.connections; 1084 1085 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1086 // don't close connections, if H4 supports power management 1087 if (bt_control_iphone_power_management_enabled()){ 1088 connection = NULL; 1089 } 1090 #endif 1091 if (connection){ 1092 1093 // send disconnect 1094 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1095 1096 log_info("HCI_STATE_FALLING_ASLEEP, connection %lu, handle %u\n", (uintptr_t) connection, (uint16_t)connection->con_handle); 1097 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1098 1099 // send disconnected event right away - causes higher layer connections to get closed, too. 1100 hci_shutdown_connection(connection); 1101 return; 1102 } 1103 1104 // disable page and inquiry scan 1105 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1106 1107 log_info("HCI_STATE_HALTING, disabling inq & page scans\n"); 1108 hci_send_cmd(&hci_write_scan_enable, 0); // none 1109 1110 // continue in next sub state 1111 hci_stack.substate++; 1112 break; 1113 case 1: 1114 // wait for command complete "hci_write_scan_enable" in event_handler(); 1115 break; 1116 case 2: 1117 log_info("HCI_STATE_HALTING, calling sleep\n"); 1118 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1119 // don't actually go to sleep, if H4 supports power management 1120 if (bt_control_iphone_power_management_enabled()){ 1121 // SLEEP MODE reached 1122 hci_stack.state = HCI_STATE_SLEEPING; 1123 hci_emit_state(); 1124 break; 1125 } 1126 #endif 1127 // switch mode 1128 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1129 hci_emit_state(); 1130 break; 1131 1132 default: 1133 break; 1134 } 1135 break; 1136 1137 default: 1138 break; 1139 } 1140 } 1141 1142 int hci_send_cmd_packet(uint8_t *packet, int size){ 1143 bd_addr_t addr; 1144 hci_connection_t * conn; 1145 // house-keeping 1146 1147 // create_connection? 1148 if (IS_COMMAND(packet, hci_create_connection)){ 1149 bt_flip_addr(addr, &packet[3]); 1150 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1151 conn = connection_for_address(addr); 1152 if (conn) { 1153 // if connection exists 1154 if (conn->state == OPEN) { 1155 // and OPEN, emit connection complete command 1156 hci_emit_connection_complete(conn, 0); 1157 } 1158 // otherwise, just ignore as it is already in the open process 1159 return 0; // don't sent packet to controller 1160 1161 } 1162 // create connection struct and register, state = SENT_CREATE_CONNECTION 1163 conn = create_connection_for_addr(addr); 1164 if (!conn){ 1165 // notify client that alloc failed 1166 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1167 return 0; // don't sent packet to controller 1168 } 1169 conn->state = SENT_CREATE_CONNECTION; 1170 } 1171 1172 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1173 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1174 } 1175 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1176 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1177 } 1178 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1179 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1180 } 1181 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1182 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 1183 } 1184 1185 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1186 if (hci_stack.remote_device_db){ 1187 bt_flip_addr(addr, &packet[3]); 1188 hci_stack.remote_device_db->delete_link_key(&addr); 1189 } 1190 } 1191 1192 hci_stack.num_cmd_packets--; 1193 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1194 } 1195 1196 /** 1197 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1198 */ 1199 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1200 va_list argptr; 1201 va_start(argptr, cmd); 1202 uint16_t size = hci_create_cmd_internal(hci_stack.hci_packet_buffer, cmd, argptr); 1203 va_end(argptr); 1204 return hci_send_cmd_packet(hci_stack.hci_packet_buffer, size); 1205 } 1206 1207 // Create various non-HCI events. 1208 // TODO: generalize, use table similar to hci_create_command 1209 1210 void hci_emit_state(){ 1211 uint8_t event[3]; 1212 event[0] = BTSTACK_EVENT_STATE; 1213 event[1] = sizeof(event) - 2; 1214 event[2] = hci_stack.state; 1215 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1216 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1217 } 1218 1219 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1220 uint8_t event[13]; 1221 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1222 event[1] = sizeof(event) - 2; 1223 event[2] = status; 1224 bt_store_16(event, 3, conn->con_handle); 1225 bt_flip_addr(&event[5], conn->address); 1226 event[11] = 1; // ACL connection 1227 event[12] = 0; // encryption disabled 1228 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1229 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1230 } 1231 1232 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1233 uint8_t event[6]; 1234 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1235 event[1] = sizeof(event) - 2; 1236 event[2] = 0; // status = OK 1237 bt_store_16(event, 3, handle); 1238 event[5] = reason; 1239 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1240 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1241 } 1242 1243 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1244 uint8_t event[4]; 1245 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1246 event[1] = sizeof(event) - 2; 1247 bt_store_16(event, 2, conn->con_handle); 1248 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1249 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1250 } 1251 1252 void hci_emit_nr_connections_changed(){ 1253 uint8_t event[3]; 1254 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1255 event[1] = sizeof(event) - 2; 1256 event[2] = nr_hci_connections(); 1257 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1258 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1259 } 1260 1261 void hci_emit_hci_open_failed(){ 1262 uint8_t event[2]; 1263 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1264 event[1] = sizeof(event) - 2; 1265 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1266 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1267 } 1268 1269 #ifndef EMBEDDED 1270 void hci_emit_btstack_version() { 1271 uint8_t event[6]; 1272 event[0] = BTSTACK_EVENT_VERSION; 1273 event[1] = sizeof(event) - 2; 1274 event[2] = BTSTACK_MAJOR; 1275 event[3] = BTSTACK_MINOR; 1276 bt_store_16(event, 4, BTSTACK_REVISION); 1277 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1278 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1279 } 1280 #endif 1281 1282 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1283 uint8_t event[3]; 1284 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1285 event[1] = sizeof(event) - 2; 1286 event[2] = enabled; 1287 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1288 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1289 } 1290 1291 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1292 uint8_t event[2+1+6+248]; 1293 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1294 event[1] = sizeof(event) - 2; 1295 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1296 bt_flip_addr(&event[3], *addr); 1297 memcpy(&event[9], name, 248); 1298 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1299 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1300 } 1301 1302 void hci_emit_discoverable_enabled(uint8_t enabled){ 1303 uint8_t event[3]; 1304 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1305 event[1] = sizeof(event) - 2; 1306 event[2] = enabled; 1307 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1308 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1309 } 1310