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