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 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 399 if (!packet[2]){ 400 handle = READ_BT_16(packet, 3); 401 hci_connection_t * conn = connection_for_handle(handle); 402 if (conn) { 403 log_dbg("Connection closed: handle %u, ", conn->con_handle); 404 print_bd_addr( conn->address ); 405 log_dbg("\n"); 406 run_loop_remove_timer(&conn->timeout); 407 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 408 free( conn ); 409 hci_emit_nr_connections_changed(); 410 } 411 } 412 break; 413 414 default: 415 break; 416 } 417 418 // handle BT initialization 419 if (hci_stack.state == HCI_STATE_INITIALIZING){ 420 // handle H4 synchronization loss on restart 421 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 422 // hci_stack.substate = 0; 423 // } 424 // handle normal init sequence 425 if (hci_stack.substate % 2){ 426 // odd: waiting for event 427 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 428 hci_stack.substate++; 429 } 430 } 431 } 432 433 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 434 435 // execute main loop 436 hci_run(); 437 } 438 439 void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 440 switch (packet_type) { 441 case HCI_EVENT_PACKET: 442 event_handler(packet, size); 443 break; 444 case HCI_ACL_DATA_PACKET: 445 acl_handler(packet, size); 446 break; 447 default: 448 break; 449 } 450 } 451 452 /** Register HCI packet handlers */ 453 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 454 hci_stack.packet_handler = handler; 455 } 456 457 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control){ 458 459 // reference to use transport layer implementation 460 hci_stack.hci_transport = transport; 461 462 // references to used control implementation 463 hci_stack.control = control; 464 465 // reference to used config 466 hci_stack.config = config; 467 468 // no connections yet 469 hci_stack.connections = NULL; 470 471 // empty cmd buffer 472 hci_stack.hci_cmd_buffer = malloc(3+255); 473 474 // higher level handler 475 hci_stack.packet_handler = dummy_handler; 476 477 // register packet handlers with transport 478 transport->register_packet_handler(&packet_handler); 479 } 480 481 int hci_power_control(HCI_POWER_MODE power_mode){ 482 if (power_mode == HCI_POWER_ON && hci_stack.state == HCI_STATE_OFF) { 483 484 // power on 485 int err = 0; 486 if (hci_stack.control && hci_stack.control->on){ 487 err = (*hci_stack.control->on)(hci_stack.config); 488 } 489 if (err){ 490 log_err( "POWER_ON failed\n"); 491 hci_emit_hci_open_failed(); 492 return err; 493 } 494 495 // open low-level device 496 err = hci_stack.hci_transport->open(hci_stack.config); 497 if (err){ 498 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 499 if (hci_stack.control && hci_stack.control->off){ 500 (*hci_stack.control->off)(hci_stack.config); 501 } 502 hci_emit_hci_open_failed(); 503 return err; 504 } 505 506 // set up state machine 507 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 508 hci_stack.state = HCI_STATE_INITIALIZING; 509 hci_stack.substate = 0; 510 511 } else if (power_mode == HCI_POWER_OFF && hci_stack.state == HCI_STATE_WORKING){ 512 513 // close low-level device 514 hci_stack.hci_transport->close(hci_stack.config); 515 516 // power off 517 if (hci_stack.control && hci_stack.control->off){ 518 (*hci_stack.control->off)(hci_stack.config); 519 } 520 521 // we're off now 522 hci_stack.state = HCI_STATE_OFF; 523 } 524 525 // create internal event 526 hci_emit_state(); 527 528 // trigger next/first action 529 hci_run(); 530 531 return 0; 532 } 533 534 void hci_run(){ 535 536 switch (hci_stack.state){ 537 case HCI_STATE_INITIALIZING: 538 if (hci_stack.substate % 2) { 539 // odd: waiting for command completion 540 return; 541 } 542 if (hci_stack.num_cmd_packets == 0) { 543 // cannot send command yet 544 return; 545 } 546 switch (hci_stack.substate >> 1){ 547 case 0: 548 hci_send_cmd(&hci_reset); 549 break; 550 case 1: 551 // custom initialization 552 if (hci_stack.control && hci_stack.control->next_command){ 553 uint8_t * cmd = (*hci_stack.control->next_command)(hci_stack.config); 554 if (cmd) { 555 int size = 3 + cmd[2]; 556 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, cmd, size); 557 hci_stack.substate = 0; // more init commands 558 break; 559 } 560 } 561 // otherwise continue 562 hci_send_cmd(&hci_read_bd_addr); 563 break; 564 case 2: 565 hci_send_cmd(&hci_read_buffer_size); 566 break; 567 case 3: 568 // ca. 15 sec 569 hci_send_cmd(&hci_write_page_timeout, 0x6000); 570 break; 571 case 4: 572 hci_send_cmd(&hci_write_scan_enable, 3); // 3 inq scan + page scan 573 break; 574 case 5: 575 #ifndef EMBEDDED 576 { 577 char hostname[30]; 578 gethostname(hostname, 30); 579 hostname[29] = '\0'; 580 hci_send_cmd(&hci_write_local_name, hostname); 581 break; 582 } 583 case 6: 584 #endif 585 // done. 586 hci_stack.state = HCI_STATE_WORKING; 587 hci_emit_state(); 588 break; 589 default: 590 break; 591 } 592 hci_stack.substate++; 593 break; 594 default: 595 break; 596 } 597 } 598 599 int hci_send_cmd_packet(uint8_t *packet, int size){ 600 bd_addr_t addr; 601 hci_connection_t * conn; 602 // house-keeping 603 604 // create_connection? 605 if (IS_COMMAND(packet, hci_create_connection)){ 606 bt_flip_addr(addr, &packet[3]); 607 log_dbg("Create_connection to "); print_bd_addr(addr); log_dbg("\n"); 608 conn = connection_for_address(addr); 609 if (conn) { 610 // if connection exists 611 if (conn->state == OPEN) { 612 // if OPEN, emit connection complete command 613 hci_emit_connection_complete(conn); 614 } 615 // otherwise, just ignore 616 return 0; // don't sent packet to controller 617 618 } else{ 619 conn = create_connection_for_addr(addr); 620 if (conn){ 621 // create connection struct and register, state = SENT_CREATE_CONNECTION 622 conn->state = SENT_CREATE_CONNECTION; 623 } 624 } 625 } 626 627 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 628 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 629 } 630 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 631 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 632 } 633 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 634 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 635 } 636 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 637 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 638 } 639 640 // accept connection 641 642 // reject connection 643 644 // close_connection? 645 // set state = SENT_DISCONNECT 646 647 hci_stack.num_cmd_packets--; 648 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 649 } 650 651 /** 652 * pre: numcmds >= 0 - it's allowed to send a command to the controller 653 */ 654 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 655 va_list argptr; 656 va_start(argptr, cmd); 657 uint8_t * hci_cmd_buffer = hci_stack.hci_cmd_buffer; 658 uint16_t size = hci_create_cmd_internal(hci_stack.hci_cmd_buffer, cmd, argptr); 659 va_end(argptr); 660 return hci_send_cmd_packet(hci_cmd_buffer, size); 661 } 662 663 // Create various non-HCI events. 664 // TODO: generalize, use table similar to hci_create_command 665 666 void hci_emit_state(){ 667 uint8_t len = 3; 668 uint8_t event[len]; 669 event[0] = BTSTACK_EVENT_STATE; 670 event[1] = len - 3; 671 event[2] = hci_stack.state; 672 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 673 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 674 } 675 676 void hci_emit_connection_complete(hci_connection_t *conn){ 677 uint8_t len = 13; 678 uint8_t event[len]; 679 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 680 event[1] = len - 3; 681 event[2] = 0; // status = OK 682 bt_store_16(event, 3, conn->con_handle); 683 bt_flip_addr(&event[5], conn->address); 684 event[11] = 1; // ACL connection 685 event[12] = 0; // encryption disabled 686 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 687 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 688 } 689 690 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 691 uint8_t len = 4; 692 uint8_t event[len]; 693 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 694 event[1] = len - 2; 695 bt_store_16(event, 2, conn->con_handle); 696 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 697 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 698 } 699 700 void hci_emit_nr_connections_changed(){ 701 uint8_t len = 3; 702 uint8_t event[len]; 703 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 704 event[1] = len - 2; 705 event[2] = nr_hci_connections(); 706 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 707 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 708 } 709 710 void hci_emit_hci_open_failed(){ 711 uint8_t len = 2; 712 uint8_t event[len]; 713 event[0] = BTSTACK_EVENT_POWERON_FAILED; 714 event[1] = len - 2; 715 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 716 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 717 } 718 719 720 void hci_emit_btstack_version() { 721 uint8_t len = 6; 722 uint8_t event[len]; 723 event[0] = BTSTACK_EVENT_VERSION; 724 event[1] = len - 2; 725 event[len++] = BTSTACK_MAJOR; 726 event[len++] = BTSTACK_MINOR; 727 bt_store_16(event, len, BTSTACK_REVISION); 728 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 729 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 730 } 731 732 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 733 uint8_t len = 3; 734 uint8_t event[len]; 735 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 736 event[1] = len - 2; 737 event[2] = enabled; 738 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 739 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 740 } 741