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 uint16_t hci_max_acl_data_packet_length(){ 199 return hci_stack.acl_data_packet_length; 200 } 201 202 int hci_ready_to_send(hci_con_handle_t handle){ 203 return hci_number_free_acl_slots() && hci_number_outgoing_packets(handle) < 2; 204 } 205 206 int hci_send_acl_packet(uint8_t *packet, int size){ 207 208 // check for free places on BT module 209 if (!hci_number_free_acl_slots()) return -1; 210 211 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 212 hci_connection_t *connection = connection_for_handle( con_handle); 213 if (!connection) return 0; 214 hci_connection_timestamp(connection); 215 216 // count packet 217 connection->num_acl_packets_sent++; 218 // log_dbg("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 219 220 // send packet - ignore errors 221 hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 222 223 return 0; 224 } 225 226 static void acl_handler(uint8_t *packet, int size){ 227 228 // get info 229 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 230 hci_connection_t *conn = connection_for_handle(con_handle); 231 uint8_t acl_flags = READ_ACL_FLAGS(packet); 232 uint16_t acl_length = READ_ACL_LENGTH(packet); 233 234 // ignore non-registered handle 235 if (!conn){ 236 log_err( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 237 return; 238 } 239 240 // update idle timestamp 241 hci_connection_timestamp(conn); 242 243 // handle different packet types 244 switch (acl_flags & 0x03) { 245 246 case 0x01: // continuation fragment 247 248 // sanity check 249 if (conn->acl_recombination_pos == 0) { 250 log_err( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 251 return; 252 } 253 254 // append fragment payload (header already stored) 255 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 256 conn->acl_recombination_pos += acl_length; 257 258 // log_err( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", 259 // acl_length, connection->acl_recombination_pos, connection->acl_recombination_length); 260 261 // forward complete L2CAP packet if complete. 262 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 263 264 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 265 // reset recombination buffer 266 conn->acl_recombination_length = 0; 267 conn->acl_recombination_pos = 0; 268 } 269 break; 270 271 case 0x02: { // first fragment 272 273 // sanity check 274 if (conn->acl_recombination_pos) { 275 log_err( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 276 return; 277 } 278 279 // peek into L2CAP packet! 280 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 281 282 // compare fragment size to L2CAP packet size 283 if (acl_length >= l2cap_length + 4){ 284 285 // forward fragment as L2CAP packet 286 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 287 288 } else { 289 // store first fragment and tweak acl length for complete package 290 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 291 conn->acl_recombination_pos = acl_length + 4; 292 conn->acl_recombination_length = l2cap_length; 293 bt_store_16(conn->acl_recombination_buffer, 2, acl_length +4); 294 // log_err( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 295 } 296 break; 297 298 } 299 default: 300 log_err( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 301 return; 302 } 303 304 // execute main loop 305 hci_run(); 306 } 307 308 // avoid huge local variables 309 static device_name_t device_name; 310 static void event_handler(uint8_t *packet, int size){ 311 bd_addr_t addr; 312 hci_con_handle_t handle; 313 hci_connection_t * conn; 314 int i; 315 link_key_t link_key; 316 317 // get num_cmd_packets 318 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 319 // Get Num_HCI_Command_Packets 320 hci_stack.num_cmd_packets = packet[2]; 321 } 322 323 switch (packet[0]) { 324 325 case HCI_EVENT_COMMAND_COMPLETE: 326 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 327 // from offset 5 328 // status 329 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 330 // ignore: SCO data packet len (8) 331 hci_stack.total_num_acl_packets = packet[9]; 332 // ignore: total num SCO packets 333 if (hci_stack.state == HCI_STATE_INITIALIZING){ 334 log_dbg("hci_read_buffer_size: size %u, count %u\n", hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 335 } 336 } 337 break; 338 339 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 340 for (i=0; i<packet[2];i++){ 341 handle = READ_BT_16(packet, 3 + 2*i); 342 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 343 conn = connection_for_handle(handle); 344 if (!conn){ 345 log_err("hci_number_completed_packet lists unused con handle %u\n", handle); 346 continue; 347 } 348 conn->num_acl_packets_sent -= num_packets; 349 // log_dbg("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 350 } 351 break; 352 353 case HCI_EVENT_CONNECTION_REQUEST: 354 bt_flip_addr(addr, &packet[2]); 355 // TODO: eval COD 8-10 356 uint8_t link_type = packet[11]; 357 log_dbg("Connection_incoming: "); print_bd_addr(addr); log_dbg(", type %u\n", link_type); 358 if (link_type == 1) { // ACL 359 conn = connection_for_address(addr); 360 if (!conn) { 361 conn = create_connection_for_addr(addr); 362 } 363 // TODO: check for malloc failure 364 conn->state = ACCEPTED_CONNECTION_REQUEST; 365 hci_send_cmd(&hci_accept_connection_request, addr, 1); 366 } else { 367 // TODO: decline request 368 } 369 break; 370 371 case HCI_EVENT_CONNECTION_COMPLETE: 372 // Connection management 373 bt_flip_addr(addr, &packet[5]); 374 log_dbg("Connection_complete (status=%u)", packet[2]); print_bd_addr(addr); log_dbg("\n"); 375 conn = connection_for_address(addr); 376 if (conn) { 377 if (!packet[2]){ 378 conn->state = OPEN; 379 conn->con_handle = READ_BT_16(packet, 3); 380 381 gettimeofday(&conn->timestamp, NULL); 382 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 383 run_loop_add_timer(&conn->timeout); 384 385 log_dbg("New connection: handle %u, ", conn->con_handle); 386 print_bd_addr( conn->address ); 387 log_dbg("\n"); 388 389 hci_emit_nr_connections_changed(); 390 } else { 391 // connection failed, remove entry 392 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 393 free( conn ); 394 395 // if authentication error, also delete link key 396 if (packet[2] == 0x05) { 397 hci_drop_link_key_for_bd_addr(&addr); 398 } 399 } 400 } 401 break; 402 403 case HCI_EVENT_LINK_KEY_REQUEST: 404 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 405 if (!hci_stack.remote_device_db) break; 406 bt_flip_addr(addr, &packet[2]); 407 if ( hci_stack.remote_device_db->get_link_key( &addr, &link_key)){ 408 hci_send_cmd(&hci_link_key_request_reply, &addr, &link_key); 409 } else { 410 hci_send_cmd(&hci_link_key_request_negative_reply, &addr); 411 } 412 // request already answered 413 return; 414 415 case HCI_EVENT_LINK_KEY_NOTIFICATION: 416 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 417 if (!hci_stack.remote_device_db) break; 418 bt_flip_addr(addr, &packet[2]); 419 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 420 // still forward event to allow dismiss of pairing dialog 421 break; 422 423 case HCI_EVENT_PIN_CODE_REQUEST: 424 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 425 break; 426 427 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 428 if (!hci_stack.remote_device_db) break; 429 if (packet[2]) break; // status not ok 430 bt_flip_addr(addr, &packet[3]); 431 bzero(&device_name, sizeof(device_name_t)); 432 strncpy((char*) device_name, (char*) &packet[9], 248); 433 hci_stack.remote_device_db->put_name(&addr, &device_name); 434 break; 435 436 case HCI_EVENT_INQUIRY_RESULT: 437 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 438 if (!hci_stack.remote_device_db) break; 439 // first send inq result packet 440 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 441 // then send cached remote names 442 for (i=0; i<packet[2];i++){ 443 bt_flip_addr(addr, &packet[3+i*6]); 444 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 445 hci_emit_remote_name_cached(&addr, &device_name); 446 } 447 } 448 return; 449 450 case HCI_EVENT_DISCONNECTION_COMPLETE: 451 if (!packet[2]){ 452 handle = READ_BT_16(packet, 3); 453 hci_connection_t * conn = connection_for_handle(handle); 454 if (conn) { 455 log_dbg("Connection closed: handle %u, ", conn->con_handle); 456 print_bd_addr( conn->address ); 457 log_dbg("\n"); 458 run_loop_remove_timer(&conn->timeout); 459 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 460 free( conn ); 461 hci_emit_nr_connections_changed(); 462 } 463 } 464 break; 465 466 default: 467 break; 468 } 469 470 // handle BT initialization 471 if (hci_stack.state == HCI_STATE_INITIALIZING){ 472 // handle H4 synchronization loss on restart 473 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 474 // hci_stack.substate = 0; 475 // } 476 // handle normal init sequence 477 if (hci_stack.substate % 2){ 478 // odd: waiting for event 479 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 480 hci_stack.substate++; 481 } 482 } 483 } 484 485 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 486 487 // execute main loop 488 hci_run(); 489 } 490 491 void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 492 switch (packet_type) { 493 case HCI_EVENT_PACKET: 494 event_handler(packet, size); 495 break; 496 case HCI_ACL_DATA_PACKET: 497 acl_handler(packet, size); 498 break; 499 default: 500 break; 501 } 502 } 503 504 /** Register HCI packet handlers */ 505 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 506 hci_stack.packet_handler = handler; 507 } 508 509 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t * remote_device_db){ 510 511 // reference to use transport layer implementation 512 hci_stack.hci_transport = transport; 513 514 // references to used control implementation 515 hci_stack.control = control; 516 517 // reference to used config 518 hci_stack.config = config; 519 520 // no connections yet 521 hci_stack.connections = NULL; 522 523 // empty cmd buffer 524 hci_stack.hci_cmd_buffer = malloc(3+255); 525 526 // higher level handler 527 hci_stack.packet_handler = dummy_handler; 528 529 // store and open remote device db 530 hci_stack.remote_device_db = remote_device_db; 531 if (hci_stack.remote_device_db) { 532 hci_stack.remote_device_db->open(); 533 } 534 535 // register packet handlers with transport 536 transport->register_packet_handler(&packet_handler); 537 } 538 539 void hci_close(){ 540 // close remote device db 541 if (hci_stack.remote_device_db) { 542 hci_stack.remote_device_db->close(); 543 } 544 } 545 546 int hci_power_control(HCI_POWER_MODE power_mode){ 547 if (power_mode == HCI_POWER_ON && hci_stack.state == HCI_STATE_OFF) { 548 549 // power on 550 int err = 0; 551 if (hci_stack.control && hci_stack.control->on){ 552 err = (*hci_stack.control->on)(hci_stack.config); 553 } 554 if (err){ 555 log_err( "POWER_ON failed\n"); 556 hci_emit_hci_open_failed(); 557 return err; 558 } 559 560 // open low-level device 561 err = hci_stack.hci_transport->open(hci_stack.config); 562 if (err){ 563 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 564 if (hci_stack.control && hci_stack.control->off){ 565 (*hci_stack.control->off)(hci_stack.config); 566 } 567 hci_emit_hci_open_failed(); 568 return err; 569 } 570 571 // set up state machine 572 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 573 hci_stack.state = HCI_STATE_INITIALIZING; 574 hci_stack.substate = 0; 575 576 } else if (power_mode == HCI_POWER_OFF && hci_stack.state == HCI_STATE_WORKING){ 577 578 // close low-level device 579 hci_stack.hci_transport->close(hci_stack.config); 580 581 // power off 582 if (hci_stack.control && hci_stack.control->off){ 583 (*hci_stack.control->off)(hci_stack.config); 584 } 585 586 // we're off now 587 hci_stack.state = HCI_STATE_OFF; 588 } 589 590 // create internal event 591 hci_emit_state(); 592 593 // trigger next/first action 594 hci_run(); 595 596 return 0; 597 } 598 599 void hci_run(){ 600 601 switch (hci_stack.state){ 602 case HCI_STATE_INITIALIZING: 603 if (hci_stack.substate % 2) { 604 // odd: waiting for command completion 605 return; 606 } 607 if (hci_stack.num_cmd_packets == 0) { 608 // cannot send command yet 609 return; 610 } 611 switch (hci_stack.substate >> 1){ 612 case 0: 613 hci_send_cmd(&hci_reset); 614 break; 615 case 1: 616 // custom initialization 617 if (hci_stack.control && hci_stack.control->next_command){ 618 uint8_t * cmd = (*hci_stack.control->next_command)(hci_stack.config); 619 if (cmd) { 620 int size = 3 + cmd[2]; 621 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, cmd, size); 622 hci_stack.substate = 0; // more init commands 623 break; 624 } 625 } 626 // otherwise continue 627 hci_send_cmd(&hci_read_bd_addr); 628 break; 629 case 2: 630 hci_send_cmd(&hci_read_buffer_size); 631 break; 632 case 3: 633 // ca. 15 sec 634 hci_send_cmd(&hci_write_page_timeout, 0x6000); 635 break; 636 case 4: 637 hci_send_cmd(&hci_write_scan_enable, 3); // 3 inq scan + page scan 638 break; 639 case 5: 640 #ifndef EMBEDDED 641 { 642 char hostname[30]; 643 gethostname(hostname, 30); 644 hostname[29] = '\0'; 645 hci_send_cmd(&hci_write_local_name, hostname); 646 break; 647 } 648 case 6: 649 #endif 650 // done. 651 hci_stack.state = HCI_STATE_WORKING; 652 hci_emit_state(); 653 break; 654 default: 655 break; 656 } 657 hci_stack.substate++; 658 break; 659 default: 660 break; 661 } 662 } 663 664 int hci_send_cmd_packet(uint8_t *packet, int size){ 665 bd_addr_t addr; 666 hci_connection_t * conn; 667 // house-keeping 668 669 // create_connection? 670 if (IS_COMMAND(packet, hci_create_connection)){ 671 bt_flip_addr(addr, &packet[3]); 672 log_dbg("Create_connection to "); print_bd_addr(addr); log_dbg("\n"); 673 conn = connection_for_address(addr); 674 if (conn) { 675 // if connection exists 676 if (conn->state == OPEN) { 677 // if OPEN, emit connection complete command 678 hci_emit_connection_complete(conn); 679 } 680 // otherwise, just ignore 681 return 0; // don't sent packet to controller 682 683 } else{ 684 conn = create_connection_for_addr(addr); 685 if (conn){ 686 // create connection struct and register, state = SENT_CREATE_CONNECTION 687 conn->state = SENT_CREATE_CONNECTION; 688 } 689 } 690 } 691 692 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 693 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 694 } 695 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 696 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 697 } 698 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 699 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 700 } 701 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 702 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 703 } 704 705 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 706 if (hci_stack.remote_device_db){ 707 bt_flip_addr(addr, &packet[3]); 708 hci_stack.remote_device_db->delete_link_key(&addr); 709 } 710 } 711 712 hci_stack.num_cmd_packets--; 713 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 714 } 715 716 /** 717 * pre: numcmds >= 0 - it's allowed to send a command to the controller 718 */ 719 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 720 va_list argptr; 721 va_start(argptr, cmd); 722 uint8_t * hci_cmd_buffer = hci_stack.hci_cmd_buffer; 723 uint16_t size = hci_create_cmd_internal(hci_stack.hci_cmd_buffer, cmd, argptr); 724 va_end(argptr); 725 return hci_send_cmd_packet(hci_cmd_buffer, size); 726 } 727 728 // Create various non-HCI events. 729 // TODO: generalize, use table similar to hci_create_command 730 731 void hci_emit_state(){ 732 uint8_t len = 3; 733 uint8_t event[len]; 734 event[0] = BTSTACK_EVENT_STATE; 735 event[1] = len - 3; 736 event[2] = hci_stack.state; 737 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 738 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 739 } 740 741 void hci_emit_connection_complete(hci_connection_t *conn){ 742 uint8_t len = 13; 743 uint8_t event[len]; 744 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 745 event[1] = len - 3; 746 event[2] = 0; // status = OK 747 bt_store_16(event, 3, conn->con_handle); 748 bt_flip_addr(&event[5], conn->address); 749 event[11] = 1; // ACL connection 750 event[12] = 0; // encryption disabled 751 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 752 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 753 } 754 755 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 756 uint8_t len = 4; 757 uint8_t event[len]; 758 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 759 event[1] = len - 2; 760 bt_store_16(event, 2, conn->con_handle); 761 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 762 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 763 } 764 765 void hci_emit_nr_connections_changed(){ 766 uint8_t len = 3; 767 uint8_t event[len]; 768 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 769 event[1] = len - 2; 770 event[2] = nr_hci_connections(); 771 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 772 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 773 } 774 775 void hci_emit_hci_open_failed(){ 776 uint8_t len = 2; 777 uint8_t event[len]; 778 event[0] = BTSTACK_EVENT_POWERON_FAILED; 779 event[1] = len - 2; 780 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 781 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 782 } 783 784 785 void hci_emit_btstack_version() { 786 uint8_t len = 6; 787 uint8_t event[len]; 788 event[0] = BTSTACK_EVENT_VERSION; 789 event[1] = len - 2; 790 event[len++] = BTSTACK_MAJOR; 791 event[len++] = BTSTACK_MINOR; 792 bt_store_16(event, len, BTSTACK_REVISION); 793 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 794 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 795 } 796 797 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 798 uint8_t len = 3; 799 uint8_t event[len]; 800 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 801 event[1] = len - 2; 802 event[2] = enabled; 803 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 804 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 805 } 806 807 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 808 uint16_t len = 2+1+6+248; 809 uint8_t event[len]; 810 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 811 event[1] = len - 2; 812 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 813 bt_flip_addr(&event[3], *addr); 814 memcpy(&event[9], name, 248); 815 hci_dump_packet(HCI_EVENT_PACKET, 0, event, len); 816 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 817 } 818