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 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 153 if (hci_stack.remote_device_db) { 154 hci_stack.remote_device_db->delete_link_key(addr); 155 } 156 } 157 158 159 /** 160 * count connections 161 */ 162 static int nr_hci_connections(){ 163 int count = 0; 164 linked_item_t *it; 165 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 166 return count; 167 } 168 169 /** 170 * Dummy handler called by HCI 171 */ 172 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 173 } 174 175 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 176 hci_connection_t * connection = connection_for_handle(handle); 177 if (!connection) { 178 log_err("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 179 return 0; 180 } 181 return connection->num_acl_packets_sent; 182 } 183 184 uint8_t hci_number_free_acl_slots(){ 185 uint8_t free_slots = hci_stack.total_num_acl_packets; 186 linked_item_t *it; 187 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 188 hci_connection_t * connection = (hci_connection_t *) it; 189 if (free_slots < connection->num_acl_packets_sent) { 190 log_err("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 191 return 0; 192 } 193 free_slots -= connection->num_acl_packets_sent; 194 } 195 return free_slots; 196 } 197 198 int hci_ready_to_send(hci_con_handle_t handle){ 199 return hci_number_free_acl_slots() && hci_number_outgoing_packets(handle) < 2; 200 } 201 202 int hci_send_acl_packet(uint8_t *packet, int size){ 203 204 // check for free places on BT module 205 if (!hci_number_free_acl_slots()) return -1; 206 207 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 208 hci_connection_t *connection = connection_for_handle( con_handle); 209 if (!connection) return 0; 210 hci_connection_timestamp(connection); 211 212 // count packet 213 connection->num_acl_packets_sent++; 214 // log_dbg("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 215 216 // send packet - ignore errors 217 hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 218 219 return 0; 220 } 221 222 static void acl_handler(uint8_t *packet, int size){ 223 224 // get info 225 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 226 hci_connection_t *conn = connection_for_handle(con_handle); 227 uint8_t acl_flags = READ_ACL_FLAGS(packet); 228 uint16_t acl_length = READ_ACL_LENGTH(packet); 229 230 // ignore non-registered handle 231 if (!conn){ 232 log_err( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 233 return; 234 } 235 236 // update idle timestamp 237 hci_connection_timestamp(conn); 238 239 // handle different packet types 240 switch (acl_flags & 0x03) { 241 242 case 0x01: // continuation fragment 243 244 // sanity check 245 if (conn->acl_recombination_pos == 0) { 246 log_err( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 247 return; 248 } 249 250 // append fragment payload (header already stored) 251 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 252 conn->acl_recombination_pos += acl_length; 253 254 // log_err( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", 255 // acl_length, connection->acl_recombination_pos, connection->acl_recombination_length); 256 257 // forward complete L2CAP packet if complete. 258 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 259 260 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 261 // reset recombination buffer 262 conn->acl_recombination_length = 0; 263 conn->acl_recombination_pos = 0; 264 } 265 break; 266 267 case 0x02: { // first fragment 268 269 // sanity check 270 if (conn->acl_recombination_pos) { 271 log_err( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 272 return; 273 } 274 275 // peek into L2CAP packet! 276 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 277 278 // compare fragment size to L2CAP packet size 279 if (acl_length >= l2cap_length + 4){ 280 281 // forward fragment as L2CAP packet 282 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 283 284 } else { 285 // store first fragment and tweak acl length for complete package 286 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 287 conn->acl_recombination_pos = acl_length + 4; 288 conn->acl_recombination_length = l2cap_length; 289 bt_store_16(conn->acl_recombination_buffer, 2, acl_length +4); 290 // log_err( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 291 } 292 break; 293 294 } 295 default: 296 log_err( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 297 return; 298 } 299 300 // execute main loop 301 hci_run(); 302 } 303 304 static void event_handler(uint8_t *packet, int size){ 305 bd_addr_t addr; 306 hci_con_handle_t handle; 307 hci_connection_t * conn; 308 int i; 309 link_key_t link_key; 310 311 // get num_cmd_packets 312 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 313 // Get Num_HCI_Command_Packets 314 hci_stack.num_cmd_packets = packet[2]; 315 } 316 317 switch (packet[0]) { 318 319 case HCI_EVENT_COMMAND_COMPLETE: 320 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 321 // from offset 5 322 // status 323 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 324 // ignore: SCO data packet len (8) 325 hci_stack.total_num_acl_packets = packet[9]; 326 // ignore: total num SCO packets 327 if (hci_stack.state == HCI_STATE_INITIALIZING){ 328 log_dbg("hci_read_buffer_size: size %u, count %u\n", hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 329 } 330 } 331 break; 332 333 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 334 for (i=0; i<packet[2];i++){ 335 handle = READ_BT_16(packet, 3 + 2*i); 336 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 337 conn = connection_for_handle(handle); 338 if (!conn){ 339 log_err("hci_number_completed_packet lists unused con handle %u\n", handle); 340 continue; 341 } 342 conn->num_acl_packets_sent -= num_packets; 343 // log_dbg("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 344 } 345 break; 346 347 case HCI_EVENT_CONNECTION_REQUEST: 348 bt_flip_addr(addr, &packet[2]); 349 // TODO: eval COD 8-10 350 uint8_t link_type = packet[11]; 351 log_dbg("Connection_incoming: "); print_bd_addr(addr); log_dbg(", type %u\n", link_type); 352 if (link_type == 1) { // ACL 353 conn = connection_for_address(addr); 354 if (!conn) { 355 conn = create_connection_for_addr(addr); 356 } 357 // TODO: check for malloc failure 358 conn->state = ACCEPTED_CONNECTION_REQUEST; 359 hci_send_cmd(&hci_accept_connection_request, addr, 1); 360 } else { 361 // TODO: decline request 362 } 363 break; 364 365 case HCI_EVENT_CONNECTION_COMPLETE: 366 // Connection management 367 bt_flip_addr(addr, &packet[5]); 368 log_dbg("Connection_complete (status=%u)", packet[2]); print_bd_addr(addr); log_dbg("\n"); 369 conn = connection_for_address(addr); 370 if (conn) { 371 if (!packet[2]){ 372 conn->state = OPEN; 373 conn->con_handle = READ_BT_16(packet, 3); 374 375 gettimeofday(&conn->timestamp, NULL); 376 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 377 run_loop_add_timer(&conn->timeout); 378 379 log_dbg("New connection: handle %u, ", conn->con_handle); 380 print_bd_addr( conn->address ); 381 log_dbg("\n"); 382 383 hci_emit_nr_connections_changed(); 384 } else { 385 386 // connection failed, remove entry 387 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 388 free( conn ); 389 390 // if authentication error, also delete link key 391 if (packet[2] == 0x05) { 392 hci_drop_link_key_for_bd_addr(&addr); 393 } 394 } 395 } 396 break; 397 398 case HCI_EVENT_LINK_KEY_REQUEST: 399 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 400 if (hci_stack.remote_device_db) { 401 bt_flip_addr(addr, &packet[2]); 402 if ( hci_stack.remote_device_db->get_link_key( &addr, &link_key)){ 403 hci_send_cmd(&hci_link_key_request_reply, &addr, &link_key); 404 } else { 405 hci_send_cmd(&hci_link_key_request_negative_reply, &addr); 406 } 407 // request already answered 408 return; 409 } 410 break; 411 412 case HCI_EVENT_LINK_KEY_NOTIFICATION: 413 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 414 if (hci_stack.remote_device_db) { 415 bt_flip_addr(addr, &packet[2]); 416 hci_stack.remote_device_db->put_link_key(&addr, &link_key); 417 } 418 // still forward event to allow dismiss of pairing dialog 419 break; 420 421 case HCI_EVENT_PIN_CODE_REQUEST: 422 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 423 break; 424 425 case HCI_EVENT_DISCONNECTION_COMPLETE: 426 if (!packet[2]){ 427 handle = READ_BT_16(packet, 3); 428 hci_connection_t * conn = connection_for_handle(handle); 429 if (conn) { 430 log_dbg("Connection closed: handle %u, ", conn->con_handle); 431 print_bd_addr( conn->address ); 432 log_dbg("\n"); 433 run_loop_remove_timer(&conn->timeout); 434 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 435 free( conn ); 436 hci_emit_nr_connections_changed(); 437 } 438 } 439 break; 440 441 default: 442 break; 443 } 444 445 // handle BT initialization 446 if (hci_stack.state == HCI_STATE_INITIALIZING){ 447 // handle H4 synchronization loss on restart 448 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 449 // hci_stack.substate = 0; 450 // } 451 // handle normal init sequence 452 if (hci_stack.substate % 2){ 453 // odd: waiting for event 454 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 455 hci_stack.substate++; 456 } 457 } 458 } 459 460 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 461 462 // execute main loop 463 hci_run(); 464 } 465 466 void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 467 switch (packet_type) { 468 case HCI_EVENT_PACKET: 469 event_handler(packet, size); 470 break; 471 case HCI_ACL_DATA_PACKET: 472 acl_handler(packet, size); 473 break; 474 default: 475 break; 476 } 477 } 478 479 /** Register HCI packet handlers */ 480 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 481 hci_stack.packet_handler = handler; 482 } 483 484 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control){ 485 486 // reference to use transport layer implementation 487 hci_stack.hci_transport = transport; 488 489 // references to used control implementation 490 hci_stack.control = control; 491 492 // reference to used config 493 hci_stack.config = config; 494 495 // no connections yet 496 hci_stack.connections = NULL; 497 498 // empty cmd buffer 499 hci_stack.hci_cmd_buffer = malloc(3+255); 500 501 // higher level handler 502 hci_stack.packet_handler = dummy_handler; 503 504 // no link key db yet 505 hci_stack.remote_device_db = NULL; 506 507 // register packet handlers with transport 508 transport->register_packet_handler(&packet_handler); 509 } 510 511 int hci_power_control(HCI_POWER_MODE power_mode){ 512 if (power_mode == HCI_POWER_ON && hci_stack.state == HCI_STATE_OFF) { 513 514 // power on 515 int err = 0; 516 if (hci_stack.control && hci_stack.control->on){ 517 err = (*hci_stack.control->on)(hci_stack.config); 518 } 519 if (err){ 520 log_err( "POWER_ON failed\n"); 521 hci_emit_hci_open_failed(); 522 return err; 523 } 524 525 // open low-level device 526 err = hci_stack.hci_transport->open(hci_stack.config); 527 if (err){ 528 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 529 if (hci_stack.control && hci_stack.control->off){ 530 (*hci_stack.control->off)(hci_stack.config); 531 } 532 hci_emit_hci_open_failed(); 533 return err; 534 } 535 536 // set up state machine 537 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 538 hci_stack.state = HCI_STATE_INITIALIZING; 539 hci_stack.substate = 0; 540 541 } else if (power_mode == HCI_POWER_OFF && hci_stack.state == HCI_STATE_WORKING){ 542 543 // close low-level device 544 hci_stack.hci_transport->close(hci_stack.config); 545 546 // power off 547 if (hci_stack.control && hci_stack.control->off){ 548 (*hci_stack.control->off)(hci_stack.config); 549 } 550 551 // we're off now 552 hci_stack.state = HCI_STATE_OFF; 553 } 554 555 // create internal event 556 hci_emit_state(); 557 558 // trigger next/first action 559 hci_run(); 560 561 return 0; 562 } 563 564 void hci_run(){ 565 566 switch (hci_stack.state){ 567 case HCI_STATE_INITIALIZING: 568 if (hci_stack.substate % 2) { 569 // odd: waiting for command completion 570 return; 571 } 572 if (hci_stack.num_cmd_packets == 0) { 573 // cannot send command yet 574 return; 575 } 576 switch (hci_stack.substate >> 1){ 577 case 0: 578 hci_send_cmd(&hci_reset); 579 break; 580 case 1: 581 // custom initialization 582 if (hci_stack.control && hci_stack.control->next_command){ 583 uint8_t * cmd = (*hci_stack.control->next_command)(hci_stack.config); 584 if (cmd) { 585 int size = 3 + cmd[2]; 586 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, cmd, size); 587 hci_stack.substate = 0; // more init commands 588 break; 589 } 590 } 591 // otherwise continue 592 hci_send_cmd(&hci_read_bd_addr); 593 break; 594 case 2: 595 hci_send_cmd(&hci_read_buffer_size); 596 break; 597 case 3: 598 // ca. 15 sec 599 hci_send_cmd(&hci_write_page_timeout, 0x6000); 600 break; 601 case 4: 602 hci_send_cmd(&hci_write_scan_enable, 3); // 3 inq scan + page scan 603 break; 604 case 5: 605 #ifndef EMBEDDED 606 { 607 char hostname[30]; 608 gethostname(hostname, 30); 609 hostname[29] = '\0'; 610 hci_send_cmd(&hci_write_local_name, hostname); 611 break; 612 } 613 case 6: 614 #endif 615 // done. 616 hci_stack.state = HCI_STATE_WORKING; 617 hci_emit_state(); 618 break; 619 default: 620 break; 621 } 622 hci_stack.substate++; 623 break; 624 default: 625 break; 626 } 627 } 628 629 int hci_send_cmd_packet(uint8_t *packet, int size){ 630 bd_addr_t addr; 631 hci_connection_t * conn; 632 // house-keeping 633 634 // create_connection? 635 if (IS_COMMAND(packet, hci_create_connection)){ 636 bt_flip_addr(addr, &packet[3]); 637 log_dbg("Create_connection to "); print_bd_addr(addr); log_dbg("\n"); 638 conn = connection_for_address(addr); 639 if (conn) { 640 // if connection exists 641 if (conn->state == OPEN) { 642 // if OPEN, emit connection complete command 643 hci_emit_connection_complete(conn); 644 } 645 // otherwise, just ignore 646 return 0; // don't sent packet to controller 647 648 } else{ 649 conn = create_connection_for_addr(addr); 650 if (conn){ 651 // create connection struct and register, state = SENT_CREATE_CONNECTION 652 conn->state = SENT_CREATE_CONNECTION; 653 } 654 } 655 } 656 657 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 658 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 659 } 660 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 661 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 662 } 663 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 664 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 665 } 666 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 667 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 668 } 669 670 // accept connection 671 672 // reject connection 673 674 // close_connection? 675 // set state = SENT_DISCONNECT 676 677 hci_stack.num_cmd_packets--; 678 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 679 } 680 681 /** 682 * pre: numcmds >= 0 - it's allowed to send a command to the controller 683 */ 684 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 685 va_list argptr; 686 va_start(argptr, cmd); 687 uint8_t * hci_cmd_buffer = hci_stack.hci_cmd_buffer; 688 uint16_t size = hci_create_cmd_internal(hci_stack.hci_cmd_buffer, cmd, argptr); 689 va_end(argptr); 690 return hci_send_cmd_packet(hci_cmd_buffer, size); 691 } 692 693 // Create various non-HCI events. 694 // TODO: generalize, use table similar to hci_create_command 695 696 void hci_emit_state(){ 697 uint8_t len = 3; 698 uint8_t event[len]; 699 event[0] = BTSTACK_EVENT_STATE; 700 event[1] = len - 3; 701 event[2] = hci_stack.state; 702 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 703 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 704 } 705 706 void hci_emit_connection_complete(hci_connection_t *conn){ 707 uint8_t len = 13; 708 uint8_t event[len]; 709 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 710 event[1] = len - 3; 711 event[2] = 0; // status = OK 712 bt_store_16(event, 3, conn->con_handle); 713 bt_flip_addr(&event[5], conn->address); 714 event[11] = 1; // ACL connection 715 event[12] = 0; // encryption disabled 716 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 717 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 718 } 719 720 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 721 uint8_t len = 4; 722 uint8_t event[len]; 723 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 724 event[1] = len - 2; 725 bt_store_16(event, 2, conn->con_handle); 726 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 727 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 728 } 729 730 void hci_emit_nr_connections_changed(){ 731 uint8_t len = 3; 732 uint8_t event[len]; 733 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 734 event[1] = len - 2; 735 event[2] = nr_hci_connections(); 736 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 737 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 738 } 739 740 void hci_emit_hci_open_failed(){ 741 uint8_t len = 2; 742 uint8_t event[len]; 743 event[0] = BTSTACK_EVENT_POWERON_FAILED; 744 event[1] = len - 2; 745 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 746 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 747 } 748 749 750 void hci_emit_btstack_version() { 751 uint8_t len = 6; 752 uint8_t event[len]; 753 event[0] = BTSTACK_EVENT_VERSION; 754 event[1] = len - 2; 755 event[len++] = BTSTACK_MAJOR; 756 event[len++] = BTSTACK_MINOR; 757 bt_store_16(event, len, BTSTACK_REVISION); 758 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 759 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 760 } 761 762 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 763 uint8_t len = 3; 764 uint8_t event[len]; 765 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 766 event[1] = len - 2; 767 event[2] = enabled; 768 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 769 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 770 } 771