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 "hci.h" 40 41 #include <unistd.h> 42 #include <stdarg.h> 43 #include <string.h> 44 #include <stdio.h> 45 46 #include "debug.h" 47 #include "hci_dump.h" 48 49 #include "../include/btstack/hci_cmds.h" 50 #include "../include/btstack/version.h" 51 52 // temp 53 #include "l2cap.h" 54 55 #define HCI_CONNECTION_TIMEOUT_MS 10000 56 57 // the STACK is here 58 static hci_stack_t hci_stack; 59 60 /** 61 * get connection for a given handle 62 * 63 * @return connection OR NULL, if not found 64 */ 65 hci_connection_t * connection_for_handle(hci_con_handle_t con_handle){ 66 linked_item_t *it; 67 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 68 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 69 return (hci_connection_t *) it; 70 } 71 } 72 return NULL; 73 } 74 75 static void hci_connection_timeout_handler(timer_source_t *timer){ 76 hci_connection_t * connection = linked_item_get_user(&timer->item); 77 struct timeval tv; 78 gettimeofday(&tv, NULL); 79 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 80 // connections might be timed out 81 hci_emit_l2cap_check_timeout(connection); 82 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 83 } else { 84 // next timeout check at 85 timer->timeout.tv_sec = connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000; 86 } 87 run_loop_add_timer(timer); 88 } 89 90 static void hci_connection_timestamp(hci_connection_t *connection){ 91 gettimeofday(&connection->timestamp, NULL); 92 } 93 94 /** 95 * create connection for given address 96 * 97 * @return connection OR NULL, if not found 98 */ 99 static hci_connection_t * create_connection_for_addr(bd_addr_t addr){ 100 hci_connection_t * conn = malloc( sizeof(hci_connection_t) ); 101 if (!conn) return NULL; 102 BD_ADDR_COPY(conn->address, addr); 103 conn->con_handle = 0xffff; 104 conn->authentication_flags = 0; 105 linked_item_set_user(&conn->timeout.item, conn); 106 conn->timeout.process = hci_connection_timeout_handler; 107 hci_connection_timestamp(conn); 108 conn->acl_recombination_length = 0; 109 conn->acl_recombination_pos = 0; 110 conn->num_acl_packets_sent = 0; 111 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 112 return conn; 113 } 114 115 /** 116 * get connection for given address 117 * 118 * @return connection OR NULL, if not found 119 */ 120 static hci_connection_t * connection_for_address(bd_addr_t address){ 121 linked_item_t *it; 122 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 123 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 124 return (hci_connection_t *) it; 125 } 126 } 127 return NULL; 128 } 129 130 /** 131 * add authentication flags and reset timer 132 */ 133 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 134 bd_addr_t addr; 135 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 136 hci_connection_t * conn = connection_for_address(addr); 137 if (conn) { 138 conn->authentication_flags |= flags; 139 hci_connection_timestamp(conn); 140 } 141 } 142 143 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 144 hci_connection_t * conn = connection_for_handle(handle); 145 if (!conn) return 0; 146 if (!conn->authentication_flags) return 0; 147 if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0; 148 if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0; 149 return 1; 150 } 151 152 153 /** 154 * count connections 155 */ 156 static int nr_hci_connections(){ 157 int count = 0; 158 linked_item_t *it; 159 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 160 return count; 161 } 162 163 /** 164 * Dummy handler called by HCI 165 */ 166 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 167 } 168 169 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 170 hci_connection_t * connection = connection_for_handle(handle); 171 if (!connection) { 172 log_err("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 173 return 0; 174 } 175 return connection->num_acl_packets_sent; 176 } 177 178 uint8_t hci_number_free_acl_slots(){ 179 uint8_t free_slots = hci_stack.total_num_acl_packets; 180 linked_item_t *it; 181 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 182 hci_connection_t * connection = (hci_connection_t *) it; 183 if (free_slots < connection->num_acl_packets_sent) { 184 log_err("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 185 return 0; 186 } 187 free_slots -= connection->num_acl_packets_sent; 188 } 189 return free_slots; 190 } 191 192 int hci_ready_to_send(hci_con_handle_t handle){ 193 return hci_number_free_acl_slots() && hci_number_outgoing_packets(handle) < 2; 194 } 195 196 int hci_send_acl_packet(uint8_t *packet, int size){ 197 198 // check for free places on BT module 199 if (!hci_number_free_acl_slots()) return -1; 200 201 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 202 hci_connection_t *connection = connection_for_handle( con_handle); 203 if (!connection) return 0; 204 hci_connection_timestamp(connection); 205 206 // count packet 207 connection->num_acl_packets_sent++; 208 // log_dbg("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 209 210 // send packet - ignore errors 211 hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 212 213 return 0; 214 } 215 216 static void acl_handler(uint8_t *packet, int size){ 217 218 // get info 219 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 220 hci_connection_t *conn = connection_for_handle(con_handle); 221 uint8_t acl_flags = READ_ACL_FLAGS(packet); 222 uint16_t acl_length = READ_ACL_LENGTH(packet); 223 224 // ignore non-registered handle 225 if (!conn){ 226 log_err( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 227 return; 228 } 229 230 // update idle timestamp 231 hci_connection_timestamp(conn); 232 233 // handle different packet types 234 switch (acl_flags & 0x03) { 235 236 case 0x01: // continuation fragment 237 238 // sanity check 239 if (conn->acl_recombination_pos == 0) { 240 log_err( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 241 return; 242 } 243 244 // append fragment payload (header already stored) 245 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 246 conn->acl_recombination_pos += acl_length; 247 248 // log_err( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", 249 // acl_length, connection->acl_recombination_pos, connection->acl_recombination_length); 250 251 // forward complete L2CAP packet if complete. 252 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 253 254 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 255 // reset recombination buffer 256 conn->acl_recombination_length = 0; 257 conn->acl_recombination_pos = 0; 258 } 259 break; 260 261 case 0x02: { // first fragment 262 263 // sanity check 264 if (conn->acl_recombination_pos) { 265 log_err( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 266 return; 267 } 268 269 // peek into L2CAP packet! 270 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 271 272 // compare fragment size to L2CAP packet size 273 if (acl_length >= l2cap_length + 4){ 274 275 // forward fragment as L2CAP packet 276 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 277 278 } else { 279 // store first fragment and tweak acl length for complete package 280 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 281 conn->acl_recombination_pos = acl_length + 4; 282 conn->acl_recombination_length = l2cap_length; 283 bt_store_16(conn->acl_recombination_buffer, 2, acl_length +4); 284 // log_err( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 285 } 286 break; 287 288 } 289 default: 290 log_err( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 291 return; 292 } 293 294 // execute main loop 295 hci_run(); 296 } 297 298 static void event_handler(uint8_t *packet, int size){ 299 bd_addr_t addr; 300 hci_con_handle_t handle; 301 hci_connection_t * conn; 302 int i; 303 304 // get num_cmd_packets 305 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 306 // Get Num_HCI_Command_Packets 307 hci_stack.num_cmd_packets = packet[2]; 308 } 309 310 switch (packet[0]) { 311 312 case HCI_EVENT_COMMAND_COMPLETE: 313 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 314 // from offset 5 315 // status 316 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 317 // ignore: SCO data packet len (8) 318 hci_stack.total_num_acl_packets = packet[9]; 319 // ignore: total num SCO packets 320 if (hci_stack.state == HCI_STATE_INITIALIZING){ 321 log_dbg("hci_read_buffer_size: size %u, count %u\n", hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 322 } 323 } 324 break; 325 326 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 327 for (i=0; i<packet[2];i++){ 328 handle = READ_BT_16(packet, 3 + 2*i); 329 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 330 conn = connection_for_handle(handle); 331 if (!conn){ 332 log_err("hci_number_completed_packet lists unused con handle %u\n", handle); 333 continue; 334 } 335 conn->num_acl_packets_sent -= num_packets; 336 // log_dbg("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 337 } 338 break; 339 340 case HCI_EVENT_CONNECTION_REQUEST: 341 bt_flip_addr(addr, &packet[2]); 342 // TODO: eval COD 8-10 343 uint8_t link_type = packet[11]; 344 log_dbg("Connection_incoming: "); print_bd_addr(addr); log_dbg(", type %u\n", link_type); 345 if (link_type == 1) { // ACL 346 conn = connection_for_address(addr); 347 if (!conn) { 348 conn = create_connection_for_addr(addr); 349 } 350 // TODO: check for malloc failure 351 conn->state = ACCEPTED_CONNECTION_REQUEST; 352 hci_send_cmd(&hci_accept_connection_request, addr, 1); 353 } else { 354 // TODO: decline request 355 } 356 break; 357 358 case HCI_EVENT_CONNECTION_COMPLETE: 359 // Connection management 360 bt_flip_addr(addr, &packet[5]); 361 log_dbg("Connection_complete (status=%u)", packet[2]); print_bd_addr(addr); log_dbg("\n"); 362 conn = connection_for_address(addr); 363 if (conn) { 364 if (!packet[2]){ 365 conn->state = OPEN; 366 conn->con_handle = READ_BT_16(packet, 3); 367 368 gettimeofday(&conn->timestamp, NULL); 369 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 370 run_loop_add_timer(&conn->timeout); 371 372 log_dbg("New connection: handle %u, ", conn->con_handle); 373 print_bd_addr( conn->address ); 374 log_dbg("\n"); 375 376 hci_emit_nr_connections_changed(); 377 } else { 378 // connection failed, remove entry 379 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 380 free( conn ); 381 } 382 } 383 break; 384 385 case HCI_EVENT_LINK_KEY_REQUEST: 386 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 387 break; 388 389 case HCI_EVENT_LINK_KEY_NOTIFICATION: 390 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 391 break; 392 393 case HCI_EVENT_PIN_CODE_REQUEST: 394 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 395 break; 396 397 case HCI_EVENT_DISCONNECTION_COMPLETE: 398 if (!packet[2]){ 399 handle = READ_BT_16(packet, 3); 400 hci_connection_t * conn = connection_for_handle(handle); 401 if (conn) { 402 log_dbg("Connection closed: handle %u, ", conn->con_handle); 403 print_bd_addr( conn->address ); 404 log_dbg("\n"); 405 run_loop_remove_timer(&conn->timeout); 406 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 407 free( conn ); 408 hci_emit_nr_connections_changed(); 409 } 410 } 411 break; 412 413 default: 414 break; 415 } 416 417 // handle BT initialization 418 if (hci_stack.state == HCI_STATE_INITIALIZING){ 419 // handle H4 synchronization loss on restart 420 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 421 // hci_stack.substate = 0; 422 // } 423 // handle normal init sequence 424 if (hci_stack.substate % 2){ 425 // odd: waiting for event 426 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 427 hci_stack.substate++; 428 } 429 } 430 } 431 432 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 433 434 // execute main loop 435 hci_run(); 436 } 437 438 void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 439 switch (packet_type) { 440 case HCI_EVENT_PACKET: 441 event_handler(packet, size); 442 break; 443 case HCI_ACL_DATA_PACKET: 444 acl_handler(packet, size); 445 break; 446 default: 447 break; 448 } 449 } 450 451 /** Register HCI packet handlers */ 452 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 453 hci_stack.packet_handler = handler; 454 } 455 456 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control){ 457 458 // reference to use transport layer implementation 459 hci_stack.hci_transport = transport; 460 461 // references to used control implementation 462 hci_stack.control = control; 463 464 // reference to used config 465 hci_stack.config = config; 466 467 // no connections yet 468 hci_stack.connections = NULL; 469 470 // empty cmd buffer 471 hci_stack.hci_cmd_buffer = malloc(3+255); 472 473 // higher level handler 474 hci_stack.packet_handler = dummy_handler; 475 476 // register packet handlers with transport 477 transport->register_packet_handler(&packet_handler); 478 } 479 480 int hci_power_control(HCI_POWER_MODE power_mode){ 481 if (power_mode == HCI_POWER_ON && hci_stack.state == HCI_STATE_OFF) { 482 483 // power on 484 int err = 0; 485 if (hci_stack.control && hci_stack.control->on){ 486 err = (*hci_stack.control->on)(hci_stack.config); 487 } 488 if (err){ 489 log_err( "POWER_ON failed\n"); 490 hci_emit_hci_open_failed(); 491 return err; 492 } 493 494 // open low-level device 495 err = hci_stack.hci_transport->open(hci_stack.config); 496 if (err){ 497 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 498 if (hci_stack.control && hci_stack.control->off){ 499 (*hci_stack.control->off)(hci_stack.config); 500 } 501 hci_emit_hci_open_failed(); 502 return err; 503 } 504 505 // set up state machine 506 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 507 hci_stack.state = HCI_STATE_INITIALIZING; 508 hci_stack.substate = 0; 509 510 } else if (power_mode == HCI_POWER_OFF && hci_stack.state == HCI_STATE_WORKING){ 511 512 // close low-level device 513 hci_stack.hci_transport->close(hci_stack.config); 514 515 // power off 516 if (hci_stack.control && hci_stack.control->off){ 517 (*hci_stack.control->off)(hci_stack.config); 518 } 519 520 // we're off now 521 hci_stack.state = HCI_STATE_OFF; 522 } 523 524 // create internal event 525 hci_emit_state(); 526 527 // trigger next/first action 528 hci_run(); 529 530 return 0; 531 } 532 533 void hci_run(){ 534 535 switch (hci_stack.state){ 536 case HCI_STATE_INITIALIZING: 537 if (hci_stack.substate % 2) { 538 // odd: waiting for command completion 539 return; 540 } 541 if (hci_stack.num_cmd_packets == 0) { 542 // cannot send command yet 543 return; 544 } 545 switch (hci_stack.substate >> 1){ 546 case 0: 547 hci_send_cmd(&hci_reset); 548 break; 549 case 1: 550 // custom initialization 551 if (hci_stack.control && hci_stack.control->next_command){ 552 uint8_t * cmd = (*hci_stack.control->next_command)(hci_stack.config); 553 if (cmd) { 554 int size = 3 + cmd[2]; 555 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, cmd, size); 556 hci_stack.substate = 0; // more init commands 557 break; 558 } 559 } 560 // otherwise continue 561 hci_send_cmd(&hci_read_bd_addr); 562 break; 563 case 2: 564 hci_send_cmd(&hci_read_buffer_size); 565 break; 566 case 3: 567 // ca. 15 sec 568 hci_send_cmd(&hci_write_page_timeout, 0x6000); 569 break; 570 case 4: 571 hci_send_cmd(&hci_write_scan_enable, 3); // 3 inq scan + page scan 572 break; 573 case 5: 574 #ifndef EMBEDDED 575 { 576 char hostname[30]; 577 gethostname(hostname, 30); 578 hostname[29] = '\0'; 579 hci_send_cmd(&hci_write_local_name, hostname); 580 break; 581 } 582 case 6: 583 #endif 584 // done. 585 hci_stack.state = HCI_STATE_WORKING; 586 hci_emit_state(); 587 break; 588 default: 589 break; 590 } 591 hci_stack.substate++; 592 break; 593 default: 594 break; 595 } 596 } 597 598 int hci_send_cmd_packet(uint8_t *packet, int size){ 599 bd_addr_t addr; 600 hci_connection_t * conn; 601 // house-keeping 602 603 // create_connection? 604 if (IS_COMMAND(packet, hci_create_connection)){ 605 bt_flip_addr(addr, &packet[3]); 606 log_dbg("Create_connection to "); print_bd_addr(addr); log_dbg("\n"); 607 conn = connection_for_address(addr); 608 if (conn) { 609 // if connection exists 610 if (conn->state == OPEN) { 611 // if OPEN, emit connection complete command 612 hci_emit_connection_complete(conn); 613 } 614 // otherwise, just ignore 615 return 0; // don't sent packet to controller 616 617 } else{ 618 conn = create_connection_for_addr(addr); 619 if (conn){ 620 // create connection struct and register, state = SENT_CREATE_CONNECTION 621 conn->state = SENT_CREATE_CONNECTION; 622 } 623 } 624 } 625 626 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 627 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 628 } 629 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 630 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 631 } 632 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 633 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 634 } 635 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 636 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 637 } 638 639 // accept connection 640 641 // reject connection 642 643 // close_connection? 644 // set state = SENT_DISCONNECT 645 646 hci_stack.num_cmd_packets--; 647 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 648 } 649 650 /** 651 * pre: numcmds >= 0 - it's allowed to send a command to the controller 652 */ 653 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 654 va_list argptr; 655 va_start(argptr, cmd); 656 uint8_t * hci_cmd_buffer = hci_stack.hci_cmd_buffer; 657 uint16_t size = hci_create_cmd_internal(hci_stack.hci_cmd_buffer, cmd, argptr); 658 va_end(argptr); 659 return hci_send_cmd_packet(hci_cmd_buffer, size); 660 } 661 662 // Create various non-HCI events. 663 // TODO: generalize, use table similar to hci_create_command 664 665 void hci_emit_state(){ 666 uint8_t len = 3; 667 uint8_t event[len]; 668 event[0] = BTSTACK_EVENT_STATE; 669 event[1] = len - 3; 670 event[2] = hci_stack.state; 671 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 672 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 673 } 674 675 void hci_emit_connection_complete(hci_connection_t *conn){ 676 uint8_t len = 13; 677 uint8_t event[len]; 678 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 679 event[1] = len - 3; 680 event[2] = 0; // status = OK 681 bt_store_16(event, 3, conn->con_handle); 682 bt_flip_addr(&event[5], conn->address); 683 event[11] = 1; // ACL connection 684 event[12] = 0; // encryption disabled 685 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 686 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 687 } 688 689 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 690 uint8_t len = 4; 691 uint8_t event[len]; 692 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 693 event[1] = len - 2; 694 bt_store_16(event, 2, conn->con_handle); 695 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 696 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 697 } 698 699 void hci_emit_nr_connections_changed(){ 700 uint8_t len = 3; 701 uint8_t event[len]; 702 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 703 event[1] = len - 2; 704 event[2] = nr_hci_connections(); 705 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 706 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 707 } 708 709 void hci_emit_hci_open_failed(){ 710 uint8_t len = 2; 711 uint8_t event[len]; 712 event[0] = BTSTACK_EVENT_POWERON_FAILED; 713 event[1] = len - 2; 714 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 715 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 716 } 717 718 719 void hci_emit_btstack_version() { 720 uint8_t len = 6; 721 uint8_t event[len]; 722 event[0] = BTSTACK_EVENT_VERSION; 723 event[1] = len - 2; 724 event[len++] = BTSTACK_MAJOR; 725 event[len++] = BTSTACK_MINOR; 726 bt_store_16(event, len, BTSTACK_REVISION); 727 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 728 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 729 } 730 731 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 732 uint8_t len = 3; 733 uint8_t event[len]; 734 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 735 event[1] = len - 2; 736 event[2] = enabled; 737 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 738 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 739 } 740