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 // close low-level device 609 hci_stack.hci_transport->close(hci_stack.config); 610 611 // power off 612 if (hci_stack.control && hci_stack.control->off){ 613 (*hci_stack.control->off)(hci_stack.config); 614 } 615 hci_stack.state = HCI_STATE_OFF; 616 } 617 618 static void hci_power_control_sleep(){ 619 620 log_dbg("hci_power_control_sleep"); 621 622 #if 0 623 // don't close serial port during sleep 624 625 // close low-level device 626 hci_stack.hci_transport->close(hci_stack.config); 627 #endif 628 629 // sleep mode 630 if (hci_stack.control && hci_stack.control->sleep){ 631 (*hci_stack.control->sleep)(hci_stack.config); 632 } 633 634 hci_stack.state = HCI_STATE_SLEEPING; 635 } 636 637 static int hci_power_control_wake(){ 638 639 log_dbg("hci_power_control_wake"); 640 641 // wake on 642 if (hci_stack.control && hci_stack.control->wake){ 643 (*hci_stack.control->wake)(hci_stack.config); 644 } 645 646 #if 0 647 // open low-level device 648 int err = hci_stack.hci_transport->open(hci_stack.config); 649 if (err){ 650 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 651 if (hci_stack.control && hci_stack.control->off){ 652 (*hci_stack.control->off)(hci_stack.config); 653 } 654 hci_emit_hci_open_failed(); 655 return err; 656 } 657 #endif 658 659 return 0; 660 } 661 662 663 int hci_power_control(HCI_POWER_MODE power_mode){ 664 665 log_dbg("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 666 667 int err = 0; 668 switch (hci_stack.state){ 669 670 case HCI_STATE_OFF: 671 switch (power_mode){ 672 case HCI_POWER_ON: 673 err = hci_power_control_on(); 674 if (err) return err; 675 // set up state machine 676 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 677 hci_stack.state = HCI_STATE_INITIALIZING; 678 hci_stack.substate = 0; 679 break; 680 case HCI_POWER_OFF: 681 // do nothing 682 break; 683 case HCI_POWER_SLEEP: 684 // do nothing (with SLEEP == OFF) 685 break; 686 } 687 break; 688 689 case HCI_STATE_INITIALIZING: 690 switch (power_mode){ 691 case HCI_POWER_ON: 692 // do nothing 693 break; 694 case HCI_POWER_OFF: 695 // no connections yet, just turn it off 696 hci_power_control_off(); 697 break; 698 case HCI_POWER_SLEEP: 699 // no connections yet, just turn it off 700 hci_power_control_sleep(); 701 break; 702 } 703 break; 704 705 case HCI_STATE_WORKING: 706 switch (power_mode){ 707 case HCI_POWER_ON: 708 // do nothing 709 break; 710 case HCI_POWER_OFF: 711 // see hci_run 712 hci_stack.state = HCI_STATE_HALTING; 713 break; 714 case HCI_POWER_SLEEP: 715 // see hci_run 716 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 717 hci_stack.substate = 0; 718 break; 719 } 720 break; 721 722 case HCI_STATE_HALTING: 723 switch (power_mode){ 724 case HCI_POWER_ON: 725 // set up state machine 726 hci_stack.state = HCI_STATE_INITIALIZING; 727 hci_stack.substate = 0; 728 break; 729 case HCI_POWER_OFF: 730 // do nothing 731 break; 732 case HCI_POWER_SLEEP: 733 // see hci_run 734 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 735 hci_stack.substate = 0; 736 break; 737 } 738 break; 739 740 case HCI_STATE_FALLING_ASLEEP: 741 switch (power_mode){ 742 case HCI_POWER_ON: 743 // set up state machine 744 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 745 hci_stack.state = HCI_STATE_INITIALIZING; 746 hci_stack.substate = 0; 747 break; 748 case HCI_POWER_OFF: 749 // see hci_run 750 hci_stack.state = HCI_STATE_HALTING; 751 break; 752 case HCI_POWER_SLEEP: 753 // do nothing 754 break; 755 } 756 break; 757 758 case HCI_STATE_SLEEPING: 759 switch (power_mode){ 760 case HCI_POWER_ON: 761 err = hci_power_control_wake(); 762 if (err) return err; 763 // set up state machine 764 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 765 hci_stack.state = HCI_STATE_INITIALIZING; 766 hci_stack.substate = 0; 767 break; 768 case HCI_POWER_OFF: 769 hci_stack.state = HCI_STATE_HALTING; 770 break; 771 case HCI_POWER_SLEEP: 772 // do nothing 773 break; 774 } 775 break; 776 } 777 778 // create internal event 779 hci_emit_state(); 780 781 // trigger next/first action 782 hci_run(); 783 784 return 0; 785 } 786 787 void hci_discoverable_control(uint8_t enable){ 788 if (enable) enable = 1; // normalize argument 789 790 if (hci_stack.discoverable == enable){ 791 hci_emit_discoverable_enabled(hci_stack.discoverable); 792 return; 793 } 794 795 hci_send_cmd(&hci_write_scan_enable, 2 | enable); // 1 = inq scan, 2 = page scan 796 hci_stack.discoverable = enable; 797 } 798 799 void hci_run(){ 800 801 if (hci_stack.num_cmd_packets == 0) { 802 // cannot send command yet 803 return; 804 } 805 806 hci_connection_t * connection; 807 808 switch (hci_stack.state){ 809 case HCI_STATE_INITIALIZING: 810 if (hci_stack.substate % 2) { 811 // odd: waiting for command completion 812 return; 813 } 814 switch (hci_stack.substate >> 1){ 815 case 0: 816 hci_send_cmd(&hci_reset); 817 break; 818 case 1: 819 // custom initialization 820 if (hci_stack.control && hci_stack.control->next_command){ 821 uint8_t * cmd = (*hci_stack.control->next_command)(hci_stack.config); 822 if (cmd) { 823 int size = 3 + cmd[2]; 824 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, cmd, size); 825 hci_stack.substate = 0; // more init commands 826 break; 827 } 828 } 829 // otherwise continue 830 hci_send_cmd(&hci_read_bd_addr); 831 break; 832 case 2: 833 hci_send_cmd(&hci_read_buffer_size); 834 break; 835 case 3: 836 // ca. 15 sec 837 hci_send_cmd(&hci_write_page_timeout, 0x6000); 838 break; 839 case 4: 840 hci_send_cmd(&hci_write_scan_enable, 2 | hci_stack.discoverable); // page scan 841 break; 842 case 5: 843 #ifndef EMBEDDED 844 { 845 char hostname[30]; 846 gethostname(hostname, 30); 847 hostname[29] = '\0'; 848 hci_send_cmd(&hci_write_local_name, hostname); 849 break; 850 } 851 case 6: 852 #ifdef USE_BLUETOOL 853 hci_send_cmd(&hci_write_class_of_device, 0x007a020c); // Smartphone 854 break; 855 856 case 7: 857 #endif 858 #endif 859 // done. 860 hci_stack.state = HCI_STATE_WORKING; 861 hci_emit_state(); 862 break; 863 default: 864 break; 865 } 866 hci_stack.substate++; 867 break; 868 869 case HCI_STATE_HALTING: 870 871 log_dbg("HCI_STATE_HALTING\n"); 872 // close all open connections 873 connection = (hci_connection_t *) hci_stack.connections; 874 if (connection){ 875 log_dbg("HCI_STATE_HALTING, connection %u, handle %u\n", (int) connection, connection->con_handle); 876 // send disconnect 877 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 878 879 // send disconnected event right away - causes higher layer connections to get closed, too. 880 hci_shutdown_connection(connection); 881 return; 882 } 883 log_dbg("HCI_STATE_HALTING, calling off\n"); 884 885 // switch mode 886 hci_power_control_off(); 887 hci_emit_state(); 888 log_dbg("HCI_STATE_HALTING, done\n"); 889 break; 890 891 case HCI_STATE_FALLING_ASLEEP: 892 switch(hci_stack.substate) { 893 case 0: 894 log_dbg("HCI_STATE_FALLING_ASLEEP\n"); 895 // close all open connections 896 connection = (hci_connection_t *) hci_stack.connections; 897 if (connection){ 898 log_dbg("HCI_STATE_FALLING_ASLEEP, connection %u, handle %u\n", (int) connection, connection->con_handle); 899 // send disconnect 900 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 901 902 // send disconnected event right away - causes higher layer connections to get closed, too. 903 hci_shutdown_connection(connection); 904 return; 905 } 906 907 log_dbg("HCI_STATE_HALTING, disabling inq & page scans\n"); 908 909 // disable page and inquiry scan 910 hci_send_cmd(&hci_write_scan_enable, 0); // none 911 912 // continue in next sub state 913 hci_stack.substate++; 914 break; 915 case 1: 916 // wait for command complete "hci_write_scan_enable" in event_handler(); 917 break; 918 case 2: 919 log_dbg("HCI_STATE_HALTING, calling sleep\n"); 920 // switch mode 921 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 922 hci_emit_state(); 923 default: 924 break; 925 } 926 break; 927 928 default: 929 break; 930 } 931 } 932 933 int hci_send_cmd_packet(uint8_t *packet, int size){ 934 bd_addr_t addr; 935 hci_connection_t * conn; 936 // house-keeping 937 938 // create_connection? 939 if (IS_COMMAND(packet, hci_create_connection)){ 940 bt_flip_addr(addr, &packet[3]); 941 log_dbg("Create_connection to "); print_bd_addr(addr); log_dbg("\n"); 942 conn = connection_for_address(addr); 943 if (conn) { 944 // if connection exists 945 if (conn->state == OPEN) { 946 // if OPEN, emit connection complete command 947 hci_emit_connection_complete(conn); 948 } 949 // otherwise, just ignore 950 return 0; // don't sent packet to controller 951 952 } else{ 953 conn = create_connection_for_addr(addr); 954 if (conn){ 955 // create connection struct and register, state = SENT_CREATE_CONNECTION 956 conn->state = SENT_CREATE_CONNECTION; 957 } 958 } 959 } 960 961 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 962 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 963 } 964 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 965 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 966 } 967 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 968 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 969 } 970 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 971 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 972 } 973 974 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 975 if (hci_stack.remote_device_db){ 976 bt_flip_addr(addr, &packet[3]); 977 hci_stack.remote_device_db->delete_link_key(&addr); 978 } 979 } 980 981 hci_stack.num_cmd_packets--; 982 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 983 } 984 985 /** 986 * pre: numcmds >= 0 - it's allowed to send a command to the controller 987 */ 988 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 989 va_list argptr; 990 va_start(argptr, cmd); 991 uint8_t * hci_cmd_buffer = hci_stack.hci_cmd_buffer; 992 uint16_t size = hci_create_cmd_internal(hci_stack.hci_cmd_buffer, cmd, argptr); 993 va_end(argptr); 994 return hci_send_cmd_packet(hci_cmd_buffer, size); 995 } 996 997 // Create various non-HCI events. 998 // TODO: generalize, use table similar to hci_create_command 999 1000 void hci_emit_state(){ 1001 uint8_t len = 3; 1002 uint8_t event[len]; 1003 event[0] = BTSTACK_EVENT_STATE; 1004 event[1] = len - 3; 1005 event[2] = hci_stack.state; 1006 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1007 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1008 } 1009 1010 void hci_emit_connection_complete(hci_connection_t *conn){ 1011 uint8_t len = 13; 1012 uint8_t event[len]; 1013 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1014 event[1] = len - 3; 1015 event[2] = 0; // status = OK 1016 bt_store_16(event, 3, conn->con_handle); 1017 bt_flip_addr(&event[5], conn->address); 1018 event[11] = 1; // ACL connection 1019 event[12] = 0; // encryption disabled 1020 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1021 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1022 } 1023 1024 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1025 uint8_t len = 6; 1026 uint8_t event[len]; 1027 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1028 event[1] = len - 3; 1029 event[2] = 0; // status = OK 1030 bt_store_16(event, 3, handle); 1031 event[5] = reason; 1032 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1033 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1034 } 1035 1036 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1037 uint8_t len = 4; 1038 uint8_t event[len]; 1039 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1040 event[1] = len - 2; 1041 bt_store_16(event, 2, conn->con_handle); 1042 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1043 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1044 } 1045 1046 void hci_emit_nr_connections_changed(){ 1047 uint8_t len = 3; 1048 uint8_t event[len]; 1049 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1050 event[1] = len - 2; 1051 event[2] = nr_hci_connections(); 1052 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1053 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1054 } 1055 1056 void hci_emit_hci_open_failed(){ 1057 uint8_t len = 2; 1058 uint8_t event[len]; 1059 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1060 event[1] = len - 2; 1061 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1062 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1063 } 1064 1065 1066 void hci_emit_btstack_version() { 1067 uint8_t len = 6; 1068 uint8_t event[len]; 1069 event[0] = BTSTACK_EVENT_VERSION; 1070 event[1] = len - 2; 1071 event[len++] = BTSTACK_MAJOR; 1072 event[len++] = BTSTACK_MINOR; 1073 bt_store_16(event, len, BTSTACK_REVISION); 1074 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1075 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1076 } 1077 1078 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1079 uint8_t len = 3; 1080 uint8_t event[len]; 1081 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1082 event[1] = len - 2; 1083 event[2] = enabled; 1084 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1085 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1086 } 1087 1088 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1089 uint16_t len = 2+1+6+248; 1090 uint8_t event[len]; 1091 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1092 event[1] = len - 2; 1093 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1094 bt_flip_addr(&event[3], *addr); 1095 memcpy(&event[9], name, 248); 1096 hci_dump_packet(HCI_EVENT_PACKET, 0, event, len); 1097 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1098 } 1099 1100 void hci_emit_discoverable_enabled(uint8_t enabled){ 1101 uint8_t len = 3; 1102 uint8_t event[len]; 1103 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1104 event[1] = len - 2; 1105 event[2] = enabled; 1106 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1107 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1108 } 1109