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 static void hci_shutdown_connection(hci_connection_t *conn){ 309 log_dbg("Connection closed: handle %u, ", conn->con_handle); 310 print_bd_addr( conn->address ); 311 log_dbg("\n"); 312 313 // cancel all l2cap connections 314 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 315 316 run_loop_remove_timer(&conn->timeout); 317 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 318 free( conn ); 319 320 // now it's gone 321 hci_emit_nr_connections_changed(); 322 } 323 324 // avoid huge local variables 325 static device_name_t device_name; 326 static void event_handler(uint8_t *packet, int size){ 327 bd_addr_t addr; 328 hci_con_handle_t handle; 329 hci_connection_t * conn; 330 int i; 331 link_key_t link_key; 332 333 switch (packet[0]) { 334 335 case HCI_EVENT_COMMAND_COMPLETE: 336 // get num cmd packets 337 // log_dbg("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]); 338 hci_stack.num_cmd_packets = packet[2]; 339 340 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 341 // from offset 5 342 // status 343 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 344 // ignore: SCO data packet len (8) 345 hci_stack.total_num_acl_packets = packet[9]; 346 // ignore: total num SCO packets 347 if (hci_stack.state == HCI_STATE_INITIALIZING){ 348 log_dbg("hci_read_buffer_size: size %u, count %u\n", hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 349 } 350 } 351 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 352 hci_emit_discoverable_enabled(hci_stack.discoverable); 353 } 354 break; 355 356 case HCI_EVENT_COMMAND_STATUS: 357 // get num cmd packets 358 // log_dbg("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]); 359 hci_stack.num_cmd_packets = packet[3]; 360 break; 361 362 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 363 for (i=0; i<packet[2];i++){ 364 handle = READ_BT_16(packet, 3 + 2*i); 365 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 366 conn = connection_for_handle(handle); 367 if (!conn){ 368 log_err("hci_number_completed_packet lists unused con handle %u\n", handle); 369 continue; 370 } 371 conn->num_acl_packets_sent -= num_packets; 372 // log_dbg("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 373 } 374 break; 375 376 case HCI_EVENT_CONNECTION_REQUEST: 377 bt_flip_addr(addr, &packet[2]); 378 // TODO: eval COD 8-10 379 uint8_t link_type = packet[11]; 380 log_dbg("Connection_incoming: "); print_bd_addr(addr); log_dbg(", type %u\n", link_type); 381 if (link_type == 1) { // ACL 382 conn = connection_for_address(addr); 383 if (!conn) { 384 conn = create_connection_for_addr(addr); 385 } 386 // TODO: check for malloc failure 387 conn->state = ACCEPTED_CONNECTION_REQUEST; 388 hci_send_cmd(&hci_accept_connection_request, addr, 1); 389 } else { 390 // TODO: decline request 391 } 392 break; 393 394 case HCI_EVENT_CONNECTION_COMPLETE: 395 // Connection management 396 bt_flip_addr(addr, &packet[5]); 397 log_dbg("Connection_complete (status=%u)", packet[2]); print_bd_addr(addr); log_dbg("\n"); 398 conn = connection_for_address(addr); 399 if (conn) { 400 if (!packet[2]){ 401 conn->state = OPEN; 402 conn->con_handle = READ_BT_16(packet, 3); 403 404 gettimeofday(&conn->timestamp, NULL); 405 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 406 run_loop_add_timer(&conn->timeout); 407 408 log_dbg("New connection: handle %u, ", conn->con_handle); 409 print_bd_addr( conn->address ); 410 log_dbg("\n"); 411 412 hci_emit_nr_connections_changed(); 413 } else { 414 // connection failed, remove entry 415 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 416 free( conn ); 417 418 // if authentication error, also delete link key 419 if (packet[2] == 0x05) { 420 hci_drop_link_key_for_bd_addr(&addr); 421 } 422 } 423 } 424 break; 425 426 case HCI_EVENT_LINK_KEY_REQUEST: 427 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 428 if (!hci_stack.remote_device_db) break; 429 bt_flip_addr(addr, &packet[2]); 430 if ( hci_stack.remote_device_db->get_link_key( &addr, &link_key)){ 431 hci_send_cmd(&hci_link_key_request_reply, &addr, &link_key); 432 } else { 433 hci_send_cmd(&hci_link_key_request_negative_reply, &addr); 434 } 435 // request already answered 436 return; 437 438 case HCI_EVENT_LINK_KEY_NOTIFICATION: 439 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 440 if (!hci_stack.remote_device_db) break; 441 bt_flip_addr(addr, &packet[2]); 442 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 443 // still forward event to allow dismiss of pairing dialog 444 break; 445 446 case HCI_EVENT_PIN_CODE_REQUEST: 447 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 448 break; 449 450 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 451 if (!hci_stack.remote_device_db) break; 452 if (packet[2]) break; // status not ok 453 bt_flip_addr(addr, &packet[3]); 454 bzero(&device_name, sizeof(device_name_t)); 455 strncpy((char*) device_name, (char*) &packet[9], 248); 456 hci_stack.remote_device_db->put_name(&addr, &device_name); 457 break; 458 459 case HCI_EVENT_INQUIRY_RESULT: 460 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 461 if (!hci_stack.remote_device_db) break; 462 // first send inq result packet 463 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 464 // then send cached remote names 465 for (i=0; i<packet[2];i++){ 466 bt_flip_addr(addr, &packet[3+i*6]); 467 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 468 hci_emit_remote_name_cached(&addr, &device_name); 469 } 470 } 471 return; 472 473 case HCI_EVENT_DISCONNECTION_COMPLETE: 474 if (!packet[2]){ 475 handle = READ_BT_16(packet, 3); 476 hci_connection_t * conn = connection_for_handle(handle); 477 if (conn) { 478 hci_shutdown_connection(conn); 479 } 480 } 481 break; 482 483 default: 484 break; 485 } 486 487 // handle BT initialization 488 if (hci_stack.state == HCI_STATE_INITIALIZING){ 489 // handle H4 synchronization loss on restart 490 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 491 // hci_stack.substate = 0; 492 // } 493 // handle normal init sequence 494 if (hci_stack.substate % 2){ 495 // odd: waiting for event 496 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 497 hci_stack.substate++; 498 } 499 } 500 } 501 502 // help with BT sleep 503 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 504 && hci_stack.substate == 1 505 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 506 hci_stack.substate++; 507 } 508 509 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 510 511 // execute main loop 512 hci_run(); 513 } 514 515 void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 516 switch (packet_type) { 517 case HCI_EVENT_PACKET: 518 event_handler(packet, size); 519 break; 520 case HCI_ACL_DATA_PACKET: 521 acl_handler(packet, size); 522 break; 523 default: 524 break; 525 } 526 } 527 528 /** Register HCI packet handlers */ 529 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 530 hci_stack.packet_handler = handler; 531 } 532 533 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t * remote_device_db){ 534 535 // reference to use transport layer implementation 536 hci_stack.hci_transport = transport; 537 538 // references to used control implementation 539 hci_stack.control = control; 540 541 // reference to used config 542 hci_stack.config = config; 543 544 // no connections yet 545 hci_stack.connections = NULL; 546 hci_stack.discoverable = 0; 547 548 // empty cmd buffer 549 hci_stack.hci_cmd_buffer = malloc(3+255); 550 551 // higher level handler 552 hci_stack.packet_handler = dummy_handler; 553 554 // store and open remote device db 555 hci_stack.remote_device_db = remote_device_db; 556 if (hci_stack.remote_device_db) { 557 hci_stack.remote_device_db->open(); 558 } 559 560 // register packet handlers with transport 561 transport->register_packet_handler(&packet_handler); 562 } 563 564 void hci_close(){ 565 // close remote device db 566 if (hci_stack.remote_device_db) { 567 hci_stack.remote_device_db->close(); 568 } 569 } 570 571 // State-Module-Driver overview 572 // state module low-level 573 // HCI_STATE_OFF off close 574 // HCI_STATE_INITIALIZING, on open 575 // HCI_STATE_WORKING, on open 576 // HCI_STATE_HALTING, on open 577 // HCI_STATE_SLEEPING, off/sleep close 578 // HCI_STATE_FALLING_ASLEEP on open 579 580 static int hci_power_control_on(){ 581 582 // power on 583 int err = 0; 584 if (hci_stack.control && hci_stack.control->on){ 585 err = (*hci_stack.control->on)(hci_stack.config); 586 } 587 if (err){ 588 log_err( "POWER_ON failed\n"); 589 hci_emit_hci_open_failed(); 590 return err; 591 } 592 593 // open low-level device 594 err = hci_stack.hci_transport->open(hci_stack.config); 595 if (err){ 596 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 597 if (hci_stack.control && hci_stack.control->off){ 598 (*hci_stack.control->off)(hci_stack.config); 599 } 600 hci_emit_hci_open_failed(); 601 return err; 602 } 603 return 0; 604 } 605 606 static void hci_power_control_off(){ 607 608 log_dbg("hci_power_control_off\n"); 609 610 // close low-level device 611 hci_stack.hci_transport->close(hci_stack.config); 612 613 log_dbg("hci_power_control_off - hci_transport closed\n"); 614 615 // power off 616 if (hci_stack.control && hci_stack.control->off){ 617 (*hci_stack.control->off)(hci_stack.config); 618 } 619 620 log_dbg("hci_power_control_off - control closed\n"); 621 622 hci_stack.state = HCI_STATE_OFF; 623 } 624 625 static void hci_power_control_sleep(){ 626 627 log_dbg("hci_power_control_sleep\n"); 628 629 #if 0 630 // don't close serial port during sleep 631 632 // close low-level device 633 hci_stack.hci_transport->close(hci_stack.config); 634 #endif 635 636 // sleep mode 637 if (hci_stack.control && hci_stack.control->sleep){ 638 (*hci_stack.control->sleep)(hci_stack.config); 639 } 640 641 hci_stack.state = HCI_STATE_SLEEPING; 642 } 643 644 static int hci_power_control_wake(){ 645 646 log_dbg("hci_power_control_wake\n"); 647 648 // wake on 649 if (hci_stack.control && hci_stack.control->wake){ 650 (*hci_stack.control->wake)(hci_stack.config); 651 } 652 653 #if 0 654 // open low-level device 655 int err = hci_stack.hci_transport->open(hci_stack.config); 656 if (err){ 657 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 658 if (hci_stack.control && hci_stack.control->off){ 659 (*hci_stack.control->off)(hci_stack.config); 660 } 661 hci_emit_hci_open_failed(); 662 return err; 663 } 664 #endif 665 666 return 0; 667 } 668 669 670 int hci_power_control(HCI_POWER_MODE power_mode){ 671 672 log_dbg("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 673 674 int err = 0; 675 switch (hci_stack.state){ 676 677 case HCI_STATE_OFF: 678 switch (power_mode){ 679 case HCI_POWER_ON: 680 err = hci_power_control_on(); 681 if (err) return err; 682 // set up state machine 683 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 684 hci_stack.state = HCI_STATE_INITIALIZING; 685 hci_stack.substate = 0; 686 break; 687 case HCI_POWER_OFF: 688 // do nothing 689 break; 690 case HCI_POWER_SLEEP: 691 // do nothing (with SLEEP == OFF) 692 break; 693 } 694 break; 695 696 case HCI_STATE_INITIALIZING: 697 switch (power_mode){ 698 case HCI_POWER_ON: 699 // do nothing 700 break; 701 case HCI_POWER_OFF: 702 // no connections yet, just turn it off 703 hci_power_control_off(); 704 break; 705 case HCI_POWER_SLEEP: 706 // no connections yet, just turn it off 707 hci_power_control_sleep(); 708 break; 709 } 710 break; 711 712 case HCI_STATE_WORKING: 713 switch (power_mode){ 714 case HCI_POWER_ON: 715 // do nothing 716 break; 717 case HCI_POWER_OFF: 718 // see hci_run 719 hci_stack.state = HCI_STATE_HALTING; 720 break; 721 case HCI_POWER_SLEEP: 722 // see hci_run 723 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 724 hci_stack.substate = 0; 725 break; 726 } 727 break; 728 729 case HCI_STATE_HALTING: 730 switch (power_mode){ 731 case HCI_POWER_ON: 732 // set up state machine 733 hci_stack.state = HCI_STATE_INITIALIZING; 734 hci_stack.substate = 0; 735 break; 736 case HCI_POWER_OFF: 737 // do nothing 738 break; 739 case HCI_POWER_SLEEP: 740 // see hci_run 741 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 742 hci_stack.substate = 0; 743 break; 744 } 745 break; 746 747 case HCI_STATE_FALLING_ASLEEP: 748 switch (power_mode){ 749 case HCI_POWER_ON: 750 // set up state machine 751 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 752 hci_stack.state = HCI_STATE_INITIALIZING; 753 hci_stack.substate = 0; 754 break; 755 case HCI_POWER_OFF: 756 // see hci_run 757 hci_stack.state = HCI_STATE_HALTING; 758 break; 759 case HCI_POWER_SLEEP: 760 // do nothing 761 break; 762 } 763 break; 764 765 case HCI_STATE_SLEEPING: 766 switch (power_mode){ 767 case HCI_POWER_ON: 768 err = hci_power_control_wake(); 769 if (err) return err; 770 // set up state machine 771 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 772 hci_stack.state = HCI_STATE_INITIALIZING; 773 hci_stack.substate = 0; 774 break; 775 case HCI_POWER_OFF: 776 hci_stack.state = HCI_STATE_HALTING; 777 break; 778 case HCI_POWER_SLEEP: 779 // do nothing 780 break; 781 } 782 break; 783 } 784 785 // create internal event 786 hci_emit_state(); 787 788 // trigger next/first action 789 hci_run(); 790 791 return 0; 792 } 793 794 void hci_discoverable_control(uint8_t enable){ 795 if (enable) enable = 1; // normalize argument 796 797 if (hci_stack.discoverable == enable){ 798 hci_emit_discoverable_enabled(hci_stack.discoverable); 799 return; 800 } 801 802 hci_send_cmd(&hci_write_scan_enable, 2 | enable); // 1 = inq scan, 2 = page scan 803 hci_stack.discoverable = enable; 804 } 805 806 void hci_run(){ 807 808 if (hci_stack.num_cmd_packets == 0) { 809 // cannot send command yet 810 return; 811 } 812 813 hci_connection_t * connection; 814 815 switch (hci_stack.state){ 816 case HCI_STATE_INITIALIZING: 817 if (hci_stack.substate % 2) { 818 // odd: waiting for command completion 819 return; 820 } 821 switch (hci_stack.substate >> 1){ 822 case 0: 823 hci_send_cmd(&hci_reset); 824 break; 825 case 1: 826 // custom initialization 827 if (hci_stack.control && hci_stack.control->next_command){ 828 uint8_t * cmd = (*hci_stack.control->next_command)(hci_stack.config); 829 if (cmd) { 830 int size = 3 + cmd[2]; 831 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, cmd, size); 832 hci_stack.substate = 0; // more init commands 833 break; 834 } 835 } 836 // otherwise continue 837 hci_send_cmd(&hci_read_bd_addr); 838 break; 839 case 2: 840 hci_send_cmd(&hci_read_buffer_size); 841 break; 842 case 3: 843 // ca. 15 sec 844 hci_send_cmd(&hci_write_page_timeout, 0x6000); 845 break; 846 case 4: 847 hci_send_cmd(&hci_write_scan_enable, 2 | hci_stack.discoverable); // page scan 848 break; 849 case 5: 850 #ifndef EMBEDDED 851 { 852 char hostname[30]; 853 gethostname(hostname, 30); 854 hostname[29] = '\0'; 855 hci_send_cmd(&hci_write_local_name, hostname); 856 break; 857 } 858 case 6: 859 #ifdef USE_BLUETOOL 860 hci_send_cmd(&hci_write_class_of_device, 0x007a020c); // Smartphone 861 break; 862 863 case 7: 864 #endif 865 #endif 866 // done. 867 hci_stack.state = HCI_STATE_WORKING; 868 hci_emit_state(); 869 break; 870 default: 871 break; 872 } 873 hci_stack.substate++; 874 break; 875 876 case HCI_STATE_HALTING: 877 878 log_dbg("HCI_STATE_HALTING\n"); 879 // close all open connections 880 connection = (hci_connection_t *) hci_stack.connections; 881 if (connection){ 882 log_dbg("HCI_STATE_HALTING, connection %u, handle %u\n", (int) connection, connection->con_handle); 883 // send disconnect 884 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 885 886 // send disconnected event right away - causes higher layer connections to get closed, too. 887 hci_shutdown_connection(connection); 888 return; 889 } 890 log_dbg("HCI_STATE_HALTING, calling off\n"); 891 892 // switch mode 893 hci_power_control_off(); 894 895 log_dbg("HCI_STATE_HALTING, emitting state\n"); 896 hci_emit_state(); 897 log_dbg("HCI_STATE_HALTING, done\n"); 898 break; 899 900 case HCI_STATE_FALLING_ASLEEP: 901 switch(hci_stack.substate) { 902 case 0: 903 log_dbg("HCI_STATE_FALLING_ASLEEP\n"); 904 // close all open connections 905 connection = (hci_connection_t *) hci_stack.connections; 906 if (connection){ 907 log_dbg("HCI_STATE_FALLING_ASLEEP, connection %u, handle %u\n", (int) connection, connection->con_handle); 908 // send disconnect 909 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 910 911 // send disconnected event right away - causes higher layer connections to get closed, too. 912 hci_shutdown_connection(connection); 913 return; 914 } 915 916 log_dbg("HCI_STATE_HALTING, disabling inq & page scans\n"); 917 918 // disable page and inquiry scan 919 hci_send_cmd(&hci_write_scan_enable, 0); // none 920 921 // continue in next sub state 922 hci_stack.substate++; 923 break; 924 case 1: 925 // wait for command complete "hci_write_scan_enable" in event_handler(); 926 break; 927 case 2: 928 log_dbg("HCI_STATE_HALTING, calling sleep\n"); 929 // switch mode 930 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 931 hci_emit_state(); 932 default: 933 break; 934 } 935 break; 936 937 default: 938 break; 939 } 940 } 941 942 int hci_send_cmd_packet(uint8_t *packet, int size){ 943 bd_addr_t addr; 944 hci_connection_t * conn; 945 // house-keeping 946 947 // create_connection? 948 if (IS_COMMAND(packet, hci_create_connection)){ 949 bt_flip_addr(addr, &packet[3]); 950 log_dbg("Create_connection to "); print_bd_addr(addr); log_dbg("\n"); 951 conn = connection_for_address(addr); 952 if (conn) { 953 // if connection exists 954 if (conn->state == OPEN) { 955 // if OPEN, emit connection complete command 956 hci_emit_connection_complete(conn); 957 } 958 // otherwise, just ignore 959 return 0; // don't sent packet to controller 960 961 } else{ 962 conn = create_connection_for_addr(addr); 963 if (conn){ 964 // create connection struct and register, state = SENT_CREATE_CONNECTION 965 conn->state = SENT_CREATE_CONNECTION; 966 } 967 } 968 } 969 970 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 971 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 972 } 973 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 974 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 975 } 976 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 977 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 978 } 979 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 980 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 981 } 982 983 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 984 if (hci_stack.remote_device_db){ 985 bt_flip_addr(addr, &packet[3]); 986 hci_stack.remote_device_db->delete_link_key(&addr); 987 } 988 } 989 990 hci_stack.num_cmd_packets--; 991 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 992 } 993 994 /** 995 * pre: numcmds >= 0 - it's allowed to send a command to the controller 996 */ 997 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 998 va_list argptr; 999 va_start(argptr, cmd); 1000 uint8_t * hci_cmd_buffer = hci_stack.hci_cmd_buffer; 1001 uint16_t size = hci_create_cmd_internal(hci_stack.hci_cmd_buffer, cmd, argptr); 1002 va_end(argptr); 1003 return hci_send_cmd_packet(hci_cmd_buffer, size); 1004 } 1005 1006 // Create various non-HCI events. 1007 // TODO: generalize, use table similar to hci_create_command 1008 1009 void hci_emit_state(){ 1010 uint8_t len = 3; 1011 uint8_t event[len]; 1012 event[0] = BTSTACK_EVENT_STATE; 1013 event[1] = len - 3; 1014 event[2] = hci_stack.state; 1015 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1016 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1017 } 1018 1019 void hci_emit_connection_complete(hci_connection_t *conn){ 1020 uint8_t len = 13; 1021 uint8_t event[len]; 1022 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1023 event[1] = len - 3; 1024 event[2] = 0; // status = OK 1025 bt_store_16(event, 3, conn->con_handle); 1026 bt_flip_addr(&event[5], conn->address); 1027 event[11] = 1; // ACL connection 1028 event[12] = 0; // encryption disabled 1029 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1030 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1031 } 1032 1033 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1034 uint8_t len = 6; 1035 uint8_t event[len]; 1036 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1037 event[1] = len - 3; 1038 event[2] = 0; // status = OK 1039 bt_store_16(event, 3, handle); 1040 event[5] = reason; 1041 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1042 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1043 } 1044 1045 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1046 uint8_t len = 4; 1047 uint8_t event[len]; 1048 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1049 event[1] = len - 2; 1050 bt_store_16(event, 2, conn->con_handle); 1051 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1052 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1053 } 1054 1055 void hci_emit_nr_connections_changed(){ 1056 uint8_t len = 3; 1057 uint8_t event[len]; 1058 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1059 event[1] = len - 2; 1060 event[2] = nr_hci_connections(); 1061 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1062 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1063 } 1064 1065 void hci_emit_hci_open_failed(){ 1066 uint8_t len = 2; 1067 uint8_t event[len]; 1068 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1069 event[1] = len - 2; 1070 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1071 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1072 } 1073 1074 1075 void hci_emit_btstack_version() { 1076 uint8_t len = 6; 1077 uint8_t event[len]; 1078 event[0] = BTSTACK_EVENT_VERSION; 1079 event[1] = len - 2; 1080 event[len++] = BTSTACK_MAJOR; 1081 event[len++] = BTSTACK_MINOR; 1082 bt_store_16(event, len, BTSTACK_REVISION); 1083 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1084 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1085 } 1086 1087 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1088 uint8_t len = 3; 1089 uint8_t event[len]; 1090 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1091 event[1] = len - 2; 1092 event[2] = enabled; 1093 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1094 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1095 } 1096 1097 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1098 uint16_t len = 2+1+6+248; 1099 uint8_t event[len]; 1100 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1101 event[1] = len - 2; 1102 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1103 bt_flip_addr(&event[3], *addr); 1104 memcpy(&event[9], name, 248); 1105 hci_dump_packet(HCI_EVENT_PACKET, 0, event, len); 1106 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1107 } 1108 1109 void hci_emit_discoverable_enabled(uint8_t enabled){ 1110 uint8_t len = 3; 1111 uint8_t event[len]; 1112 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1113 event[1] = len - 2; 1114 event[2] = enabled; 1115 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1116 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1117 } 1118