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 <stdarg.h> 42 #include <string.h> 43 #include <stdio.h> 44 45 #ifndef EMBEDDED 46 #include <unistd.h> // gethostbyname 47 #endif 48 49 #include "debug.h" 50 #include "hci_dump.h" 51 52 #include "../include/btstack/hci_cmds.h" 53 #include "../include/btstack/version.h" 54 55 // temp 56 #include "l2cap.h" 57 58 #define HCI_CONNECTION_TIMEOUT_MS 10000 59 60 // the STACK is here 61 static hci_stack_t hci_stack; 62 63 /** 64 * get connection for a given handle 65 * 66 * @return connection OR NULL, if not found 67 */ 68 hci_connection_t * connection_for_handle(hci_con_handle_t con_handle){ 69 linked_item_t *it; 70 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 71 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 72 return (hci_connection_t *) it; 73 } 74 } 75 return NULL; 76 } 77 78 static void hci_connection_timeout_handler(timer_source_t *timer){ 79 #ifdef HAVE_TIME 80 hci_connection_t * connection = linked_item_get_user(&timer->item); 81 struct timeval tv; 82 gettimeofday(&tv, NULL); 83 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 84 // connections might be timed out 85 hci_emit_l2cap_check_timeout(connection); 86 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 87 } else { 88 // next timeout check at 89 timer->timeout.tv_sec = connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000; 90 } 91 run_loop_add_timer(timer); 92 #endif 93 } 94 95 static void hci_connection_timestamp(hci_connection_t *connection){ 96 #ifdef HAVE_TIME 97 gettimeofday(&connection->timestamp, NULL); 98 #endif 99 } 100 101 /** 102 * create connection for given address 103 * 104 * @return connection OR NULL, if not found 105 */ 106 static hci_connection_t * create_connection_for_addr(bd_addr_t addr){ 107 hci_connection_t * conn = malloc( sizeof(hci_connection_t) ); 108 if (!conn) return NULL; 109 BD_ADDR_COPY(conn->address, addr); 110 conn->con_handle = 0xffff; 111 conn->authentication_flags = 0; 112 #ifdef HAVE_TIME 113 linked_item_set_user(&conn->timeout.item, conn); 114 conn->timeout.process = hci_connection_timeout_handler; 115 hci_connection_timestamp(conn); 116 #endif 117 conn->acl_recombination_length = 0; 118 conn->acl_recombination_pos = 0; 119 conn->num_acl_packets_sent = 0; 120 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 121 return conn; 122 } 123 124 /** 125 * get connection for given address 126 * 127 * @return connection OR NULL, if not found 128 */ 129 static hci_connection_t * connection_for_address(bd_addr_t address){ 130 linked_item_t *it; 131 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 132 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 133 return (hci_connection_t *) it; 134 } 135 } 136 return NULL; 137 } 138 139 /** 140 * add authentication flags and reset timer 141 */ 142 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 143 bd_addr_t addr; 144 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 145 hci_connection_t * conn = connection_for_address(addr); 146 if (conn) { 147 conn->authentication_flags |= flags; 148 hci_connection_timestamp(conn); 149 } 150 } 151 152 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 153 hci_connection_t * conn = connection_for_handle(handle); 154 if (!conn) return 0; 155 if (!conn->authentication_flags) return 0; 156 if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0; 157 if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0; 158 return 1; 159 } 160 161 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 162 if (hci_stack.remote_device_db) { 163 hci_stack.remote_device_db->delete_link_key(addr); 164 } 165 } 166 167 168 /** 169 * count connections 170 */ 171 static int nr_hci_connections(void){ 172 int count = 0; 173 linked_item_t *it; 174 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 175 return count; 176 } 177 178 /** 179 * Dummy handler called by HCI 180 */ 181 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 182 } 183 184 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 185 hci_connection_t * connection = connection_for_handle(handle); 186 if (!connection) { 187 log_err("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 188 return 0; 189 } 190 return connection->num_acl_packets_sent; 191 } 192 193 uint8_t hci_number_free_acl_slots(){ 194 uint8_t free_slots = hci_stack.total_num_acl_packets; 195 linked_item_t *it; 196 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 197 hci_connection_t * connection = (hci_connection_t *) it; 198 if (free_slots < connection->num_acl_packets_sent) { 199 log_err("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 200 return 0; 201 } 202 free_slots -= connection->num_acl_packets_sent; 203 } 204 return free_slots; 205 } 206 207 uint16_t hci_max_acl_data_packet_length(){ 208 return hci_stack.acl_data_packet_length; 209 } 210 211 int hci_can_send_packet_now(uint8_t packet_type){ 212 switch (packet_type) { 213 case HCI_ACL_DATA_PACKET: 214 return hci_number_free_acl_slots(); 215 case HCI_COMMAND_DATA_PACKET: 216 return hci_stack.num_cmd_packets; 217 default: 218 return 0; 219 } 220 } 221 222 int hci_send_acl_packet(uint8_t *packet, int size){ 223 224 // check for free places on BT module 225 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 226 227 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 228 hci_connection_t *connection = connection_for_handle( con_handle); 229 if (!connection) return 0; 230 hci_connection_timestamp(connection); 231 232 // count packet 233 connection->num_acl_packets_sent++; 234 // log_dbg("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 235 236 // send packet - ignore errors 237 hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 238 239 return 0; 240 } 241 242 static void acl_handler(uint8_t *packet, int size){ 243 244 // get info 245 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 246 hci_connection_t *conn = connection_for_handle(con_handle); 247 uint8_t acl_flags = READ_ACL_FLAGS(packet); 248 uint16_t acl_length = READ_ACL_LENGTH(packet); 249 250 // ignore non-registered handle 251 if (!conn){ 252 log_err( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 253 return; 254 } 255 256 // update idle timestamp 257 hci_connection_timestamp(conn); 258 259 // handle different packet types 260 switch (acl_flags & 0x03) { 261 262 case 0x01: // continuation fragment 263 264 // sanity check 265 if (conn->acl_recombination_pos == 0) { 266 log_err( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 267 return; 268 } 269 270 // append fragment payload (header already stored) 271 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 272 conn->acl_recombination_pos += acl_length; 273 274 // log_err( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", 275 // acl_length, connection->acl_recombination_pos, connection->acl_recombination_length); 276 277 // forward complete L2CAP packet if complete. 278 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 279 280 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 281 // reset recombination buffer 282 conn->acl_recombination_length = 0; 283 conn->acl_recombination_pos = 0; 284 } 285 break; 286 287 case 0x02: { // first fragment 288 289 // sanity check 290 if (conn->acl_recombination_pos) { 291 log_err( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 292 return; 293 } 294 295 // peek into L2CAP packet! 296 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 297 298 // compare fragment size to L2CAP packet size 299 if (acl_length >= l2cap_length + 4){ 300 301 // forward fragment as L2CAP packet 302 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 303 304 } else { 305 // store first fragment and tweak acl length for complete package 306 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 307 conn->acl_recombination_pos = acl_length + 4; 308 conn->acl_recombination_length = l2cap_length; 309 bt_store_16(conn->acl_recombination_buffer, 2, acl_length +4); 310 // log_err( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 311 } 312 break; 313 314 } 315 default: 316 log_err( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 317 return; 318 } 319 320 // execute main loop 321 hci_run(); 322 } 323 324 static void hci_shutdown_connection(hci_connection_t *conn){ 325 log_dbg("Connection closed: handle %u, ", conn->con_handle); 326 print_bd_addr( conn->address ); 327 log_dbg("\n"); 328 329 // cancel all l2cap connections 330 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 331 332 #ifdef HAVE_TIME 333 run_loop_remove_timer(&conn->timeout); 334 #endif 335 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 336 free( conn ); 337 338 // now it's gone 339 hci_emit_nr_connections_changed(); 340 } 341 342 // avoid huge local variables 343 static device_name_t device_name; 344 static void event_handler(uint8_t *packet, int size){ 345 bd_addr_t addr; 346 hci_con_handle_t handle; 347 hci_connection_t * conn; 348 int i; 349 350 switch (packet[0]) { 351 352 case HCI_EVENT_COMMAND_COMPLETE: 353 // get num cmd packets 354 // log_dbg("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]); 355 hci_stack.num_cmd_packets = packet[2]; 356 357 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 358 // from offset 5 359 // status 360 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 361 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 362 // ignore: SCO data packet len (8) 363 hci_stack.total_num_acl_packets = packet[9]; 364 // ignore: total num SCO packets 365 if (hci_stack.state == HCI_STATE_INITIALIZING){ 366 log_dbg("hci_read_buffer_size: size %u, count %u\n", hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 367 } 368 } 369 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 370 hci_emit_discoverable_enabled(hci_stack.discoverable); 371 } 372 break; 373 374 case HCI_EVENT_COMMAND_STATUS: 375 // get num cmd packets 376 // log_dbg("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]); 377 hci_stack.num_cmd_packets = packet[3]; 378 break; 379 380 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 381 for (i=0; i<packet[2];i++){ 382 handle = READ_BT_16(packet, 3 + 2*i); 383 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 384 conn = connection_for_handle(handle); 385 if (!conn){ 386 log_err("hci_number_completed_packet lists unused con handle %u\n", handle); 387 continue; 388 } 389 conn->num_acl_packets_sent -= num_packets; 390 // log_dbg("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 391 } 392 break; 393 394 case HCI_EVENT_CONNECTION_REQUEST: 395 bt_flip_addr(addr, &packet[2]); 396 // TODO: eval COD 8-10 397 uint8_t link_type = packet[11]; 398 log_dbg("Connection_incoming: "); print_bd_addr(addr); log_dbg(", type %u\n", link_type); 399 if (link_type == 1) { // ACL 400 conn = connection_for_address(addr); 401 if (!conn) { 402 conn = create_connection_for_addr(addr); 403 } 404 // TODO: check for malloc failure 405 conn->state = RECEIVED_CONNECTION_REQUEST; 406 hci_run(); 407 } else { 408 // TODO: decline request 409 } 410 break; 411 412 case HCI_EVENT_CONNECTION_COMPLETE: 413 // Connection management 414 bt_flip_addr(addr, &packet[5]); 415 log_dbg("Connection_complete (status=%u)", packet[2]); print_bd_addr(addr); log_dbg("\n"); 416 conn = connection_for_address(addr); 417 if (conn) { 418 if (!packet[2]){ 419 conn->state = OPEN; 420 conn->con_handle = READ_BT_16(packet, 3); 421 422 #ifdef HAVE_TIME 423 gettimeofday(&conn->timestamp, NULL); 424 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 425 run_loop_add_timer(&conn->timeout); 426 #endif 427 log_dbg("New connection: handle %u, ", conn->con_handle); 428 print_bd_addr( conn->address ); 429 log_dbg("\n"); 430 431 hci_emit_nr_connections_changed(); 432 } else { 433 // connection failed, remove entry 434 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 435 free( conn ); 436 437 // if authentication error, also delete link key 438 if (packet[2] == 0x05) { 439 hci_drop_link_key_for_bd_addr(&addr); 440 } 441 } 442 } 443 break; 444 445 case HCI_EVENT_LINK_KEY_REQUEST: 446 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 447 if (!hci_stack.remote_device_db) break; 448 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 449 // request already answered 450 return; 451 452 case HCI_EVENT_LINK_KEY_NOTIFICATION: 453 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 454 if (!hci_stack.remote_device_db) break; 455 bt_flip_addr(addr, &packet[2]); 456 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 457 // still forward event to allow dismiss of pairing dialog 458 break; 459 460 case HCI_EVENT_PIN_CODE_REQUEST: 461 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 462 break; 463 464 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 465 if (!hci_stack.remote_device_db) break; 466 if (packet[2]) break; // status not ok 467 bt_flip_addr(addr, &packet[3]); 468 // fix for invalid remote names - terminate on 0xff 469 for (i=0; i<248;i++){ 470 if (packet[9+i] == 0xff){ 471 packet[9+i] = 0; 472 break; 473 } 474 } 475 bzero(&device_name, sizeof(device_name_t)); 476 strncpy((char*) device_name, (char*) &packet[9], 248); 477 hci_stack.remote_device_db->put_name(&addr, &device_name); 478 break; 479 480 case HCI_EVENT_INQUIRY_RESULT: 481 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 482 if (!hci_stack.remote_device_db) break; 483 // first send inq result packet 484 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 485 // then send cached remote names 486 for (i=0; i<packet[2];i++){ 487 bt_flip_addr(addr, &packet[3+i*6]); 488 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 489 hci_emit_remote_name_cached(&addr, &device_name); 490 } 491 } 492 return; 493 494 case HCI_EVENT_DISCONNECTION_COMPLETE: 495 if (!packet[2]){ 496 handle = READ_BT_16(packet, 3); 497 hci_connection_t * conn = connection_for_handle(handle); 498 if (conn) { 499 hci_shutdown_connection(conn); 500 } 501 } 502 break; 503 504 case HCI_EVENT_HARDWARE_ERROR: 505 if(hci_stack.control->hw_error){ 506 (*hci_stack.control->hw_error)(); 507 } 508 break; 509 510 default: 511 break; 512 } 513 514 // handle BT initialization 515 if (hci_stack.state == HCI_STATE_INITIALIZING){ 516 // handle H4 synchronization loss on restart 517 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 518 // hci_stack.substate = 0; 519 // } 520 // handle normal init sequence 521 if (hci_stack.substate % 2){ 522 // odd: waiting for event 523 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 524 hci_stack.substate++; 525 } 526 } 527 } 528 529 // help with BT sleep 530 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 531 && hci_stack.substate == 1 532 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 533 hci_stack.substate++; 534 } 535 536 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 537 538 // execute main loop 539 hci_run(); 540 } 541 542 void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 543 switch (packet_type) { 544 case HCI_EVENT_PACKET: 545 event_handler(packet, size); 546 break; 547 case HCI_ACL_DATA_PACKET: 548 acl_handler(packet, size); 549 break; 550 default: 551 break; 552 } 553 } 554 555 /** Register HCI packet handlers */ 556 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 557 hci_stack.packet_handler = handler; 558 } 559 560 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t * remote_device_db){ 561 562 // reference to use transport layer implementation 563 hci_stack.hci_transport = transport; 564 565 // references to used control implementation 566 hci_stack.control = control; 567 568 // reference to used config 569 hci_stack.config = config; 570 571 // no connections yet 572 hci_stack.connections = NULL; 573 hci_stack.discoverable = 0; 574 575 // empty cmd buffer 576 hci_stack.hci_cmd_buffer = malloc(3+255); 577 578 // higher level handler 579 hci_stack.packet_handler = dummy_handler; 580 581 // store and open remote device db 582 hci_stack.remote_device_db = remote_device_db; 583 if (hci_stack.remote_device_db) { 584 hci_stack.remote_device_db->open(); 585 } 586 587 // register packet handlers with transport 588 transport->register_packet_handler(&packet_handler); 589 } 590 591 void hci_close(){ 592 // close remote device db 593 if (hci_stack.remote_device_db) { 594 hci_stack.remote_device_db->close(); 595 } 596 } 597 598 // State-Module-Driver overview 599 // state module low-level 600 // HCI_STATE_OFF off close 601 // HCI_STATE_INITIALIZING, on open 602 // HCI_STATE_WORKING, on open 603 // HCI_STATE_HALTING, on open 604 // HCI_STATE_SLEEPING, off/sleep close 605 // HCI_STATE_FALLING_ASLEEP on open 606 607 static int hci_power_control_on(void){ 608 609 // power on 610 int err = 0; 611 if (hci_stack.control && hci_stack.control->on){ 612 err = (*hci_stack.control->on)(hci_stack.config); 613 } 614 if (err){ 615 log_err( "POWER_ON failed\n"); 616 hci_emit_hci_open_failed(); 617 return err; 618 } 619 620 // open low-level device 621 err = hci_stack.hci_transport->open(hci_stack.config); 622 if (err){ 623 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 624 if (hci_stack.control && hci_stack.control->off){ 625 (*hci_stack.control->off)(hci_stack.config); 626 } 627 hci_emit_hci_open_failed(); 628 return err; 629 } 630 return 0; 631 } 632 633 static void hci_power_control_off(void){ 634 635 log_dbg("hci_power_control_off\n"); 636 637 // close low-level device 638 hci_stack.hci_transport->close(hci_stack.config); 639 640 log_dbg("hci_power_control_off - hci_transport closed\n"); 641 642 // power off 643 if (hci_stack.control && hci_stack.control->off){ 644 (*hci_stack.control->off)(hci_stack.config); 645 } 646 647 log_dbg("hci_power_control_off - control closed\n"); 648 649 hci_stack.state = HCI_STATE_OFF; 650 } 651 652 static void hci_power_control_sleep(void){ 653 654 log_dbg("hci_power_control_sleep\n"); 655 656 #if 0 657 // don't close serial port during sleep 658 659 // close low-level device 660 hci_stack.hci_transport->close(hci_stack.config); 661 #endif 662 663 // sleep mode 664 if (hci_stack.control && hci_stack.control->sleep){ 665 (*hci_stack.control->sleep)(hci_stack.config); 666 } 667 668 hci_stack.state = HCI_STATE_SLEEPING; 669 } 670 671 static int hci_power_control_wake(void){ 672 673 log_dbg("hci_power_control_wake\n"); 674 675 // wake on 676 if (hci_stack.control && hci_stack.control->wake){ 677 (*hci_stack.control->wake)(hci_stack.config); 678 } 679 680 #if 0 681 // open low-level device 682 int err = hci_stack.hci_transport->open(hci_stack.config); 683 if (err){ 684 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 685 if (hci_stack.control && hci_stack.control->off){ 686 (*hci_stack.control->off)(hci_stack.config); 687 } 688 hci_emit_hci_open_failed(); 689 return err; 690 } 691 #endif 692 693 return 0; 694 } 695 696 697 int hci_power_control(HCI_POWER_MODE power_mode){ 698 699 log_dbg("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 700 701 int err = 0; 702 switch (hci_stack.state){ 703 704 case HCI_STATE_OFF: 705 switch (power_mode){ 706 case HCI_POWER_ON: 707 err = hci_power_control_on(); 708 if (err) return err; 709 // set up state machine 710 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 711 hci_stack.state = HCI_STATE_INITIALIZING; 712 hci_stack.substate = 0; 713 break; 714 case HCI_POWER_OFF: 715 // do nothing 716 break; 717 case HCI_POWER_SLEEP: 718 // do nothing (with SLEEP == OFF) 719 break; 720 } 721 break; 722 723 case HCI_STATE_INITIALIZING: 724 switch (power_mode){ 725 case HCI_POWER_ON: 726 // do nothing 727 break; 728 case HCI_POWER_OFF: 729 // no connections yet, just turn it off 730 hci_power_control_off(); 731 break; 732 case HCI_POWER_SLEEP: 733 // no connections yet, just turn it off 734 hci_power_control_sleep(); 735 break; 736 } 737 break; 738 739 case HCI_STATE_WORKING: 740 switch (power_mode){ 741 case HCI_POWER_ON: 742 // do nothing 743 break; 744 case HCI_POWER_OFF: 745 // see hci_run 746 hci_stack.state = HCI_STATE_HALTING; 747 break; 748 case HCI_POWER_SLEEP: 749 // see hci_run 750 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 751 hci_stack.substate = 0; 752 break; 753 } 754 break; 755 756 case HCI_STATE_HALTING: 757 switch (power_mode){ 758 case HCI_POWER_ON: 759 // set up state machine 760 hci_stack.state = HCI_STATE_INITIALIZING; 761 hci_stack.substate = 0; 762 break; 763 case HCI_POWER_OFF: 764 // do nothing 765 break; 766 case HCI_POWER_SLEEP: 767 // see hci_run 768 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 769 hci_stack.substate = 0; 770 break; 771 } 772 break; 773 774 case HCI_STATE_FALLING_ASLEEP: 775 switch (power_mode){ 776 case HCI_POWER_ON: 777 // set up state machine 778 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 779 hci_stack.state = HCI_STATE_INITIALIZING; 780 hci_stack.substate = 0; 781 break; 782 case HCI_POWER_OFF: 783 // see hci_run 784 hci_stack.state = HCI_STATE_HALTING; 785 break; 786 case HCI_POWER_SLEEP: 787 // do nothing 788 break; 789 } 790 break; 791 792 case HCI_STATE_SLEEPING: 793 switch (power_mode){ 794 case HCI_POWER_ON: 795 err = hci_power_control_wake(); 796 if (err) return err; 797 // set up state machine 798 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 799 hci_stack.state = HCI_STATE_INITIALIZING; 800 hci_stack.substate = 0; 801 break; 802 case HCI_POWER_OFF: 803 hci_stack.state = HCI_STATE_HALTING; 804 break; 805 case HCI_POWER_SLEEP: 806 // do nothing 807 break; 808 } 809 break; 810 } 811 812 // create internal event 813 hci_emit_state(); 814 815 // trigger next/first action 816 hci_run(); 817 818 return 0; 819 } 820 821 void hci_discoverable_control(uint8_t enable){ 822 if (enable) enable = 1; // normalize argument 823 824 if (hci_stack.discoverable == enable){ 825 hci_emit_discoverable_enabled(hci_stack.discoverable); 826 return; 827 } 828 829 hci_send_cmd(&hci_write_scan_enable, 2 | enable); // 1 = inq scan, 2 = page scan 830 hci_stack.discoverable = enable; 831 } 832 833 void hci_run(){ 834 835 hci_connection_t * connection; 836 linked_item_t * it; 837 838 // send pending HCI commands 839 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 840 841 connection = (hci_connection_t *) it; 842 843 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 844 845 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 846 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 847 connection->state = ACCEPTED_CONNECTION_REQUEST; 848 } 849 850 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 851 852 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 853 link_key_t link_key; 854 if ( hci_stack.remote_device_db->get_link_key( &connection->address, &link_key)){ 855 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 856 } else { 857 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 858 } 859 connection->authentication_flags &= ~HANDLE_LINK_KEY_REQUEST; 860 } 861 } 862 863 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 864 865 switch (hci_stack.state){ 866 case HCI_STATE_INITIALIZING: 867 if (hci_stack.substate % 2) { 868 // odd: waiting for command completion 869 return; 870 } 871 switch (hci_stack.substate >> 1){ 872 case 0: // RESET 873 hci_send_cmd(&hci_reset); 874 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 875 // skip baud change 876 hci_stack.substate = 4; // >> 1 = 2 877 } 878 break; 879 case 1: // SEND BAUD CHANGE 880 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_cmd_buffer); 881 hci_send_cmd_packet(hci_stack.hci_cmd_buffer, 3 + hci_stack.hci_cmd_buffer[2]); 882 break; 883 case 2: // LOCAL BAUD CHANGE 884 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 885 hci_stack.substate += 2; 886 // break missing here for fall through 887 888 case 3: 889 // custom initialization 890 if (hci_stack.control && hci_stack.control->next_command){ 891 uint8_t * cmd = (*hci_stack.control->next_command)(hci_stack.config); 892 if (cmd) { 893 int size = 3 + cmd[2]; 894 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, cmd, size); 895 hci_stack.substate = 4; // more init commands 896 break; 897 } 898 printf("hci_run: init script done\n\r"); 899 } 900 // otherwise continue 901 hci_send_cmd(&hci_read_bd_addr); 902 break; 903 case 4: 904 hci_send_cmd(&hci_read_buffer_size); 905 break; 906 case 5: 907 // ca. 15 sec 908 hci_send_cmd(&hci_write_page_timeout, 0x6000); 909 break; 910 case 6: 911 hci_send_cmd(&hci_write_scan_enable, 2 | hci_stack.discoverable); // page scan 912 break; 913 case 7: 914 #ifndef EMBEDDED 915 { 916 char hostname[30]; 917 gethostname(hostname, 30); 918 hostname[29] = '\0'; 919 hci_send_cmd(&hci_write_local_name, hostname); 920 break; 921 } 922 case 8: 923 #ifdef USE_BLUETOOL 924 hci_send_cmd(&hci_write_class_of_device, 0x007a020c); // Smartphone 925 break; 926 927 case 9: 928 #endif 929 #endif 930 // done. 931 hci_stack.state = HCI_STATE_WORKING; 932 hci_emit_state(); 933 break; 934 default: 935 break; 936 } 937 hci_stack.substate++; 938 break; 939 940 case HCI_STATE_HALTING: 941 942 log_dbg("HCI_STATE_HALTING\n"); 943 // close all open connections 944 connection = (hci_connection_t *) hci_stack.connections; 945 if (connection){ 946 947 // send disconnect 948 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 949 950 log_dbg("HCI_STATE_HALTING, connection %lu, handle %u\n", (uintptr_t) connection, connection->con_handle); 951 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 952 953 // send disconnected event right away - causes higher layer connections to get closed, too. 954 hci_shutdown_connection(connection); 955 return; 956 } 957 log_dbg("HCI_STATE_HALTING, calling off\n"); 958 959 // switch mode 960 hci_power_control_off(); 961 962 log_dbg("HCI_STATE_HALTING, emitting state\n"); 963 hci_emit_state(); 964 log_dbg("HCI_STATE_HALTING, done\n"); 965 break; 966 967 case HCI_STATE_FALLING_ASLEEP: 968 switch(hci_stack.substate) { 969 case 0: 970 log_dbg("HCI_STATE_FALLING_ASLEEP\n"); 971 // close all open connections 972 connection = (hci_connection_t *) hci_stack.connections; 973 if (connection){ 974 975 // send disconnect 976 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 977 978 log_dbg("HCI_STATE_FALLING_ASLEEP, connection %lu, handle %u\n", (uintptr_t) connection, connection->con_handle); 979 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 980 981 // send disconnected event right away - causes higher layer connections to get closed, too. 982 hci_shutdown_connection(connection); 983 return; 984 } 985 986 // disable page and inquiry scan 987 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 988 989 log_dbg("HCI_STATE_HALTING, disabling inq & page scans\n"); 990 hci_send_cmd(&hci_write_scan_enable, 0); // none 991 992 // continue in next sub state 993 hci_stack.substate++; 994 break; 995 case 1: 996 // wait for command complete "hci_write_scan_enable" in event_handler(); 997 break; 998 case 2: 999 log_dbg("HCI_STATE_HALTING, calling sleep\n"); 1000 // switch mode 1001 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1002 hci_emit_state(); 1003 default: 1004 break; 1005 } 1006 break; 1007 1008 default: 1009 break; 1010 } 1011 } 1012 1013 int hci_send_cmd_packet(uint8_t *packet, int size){ 1014 bd_addr_t addr; 1015 hci_connection_t * conn; 1016 // house-keeping 1017 1018 // create_connection? 1019 if (IS_COMMAND(packet, hci_create_connection)){ 1020 bt_flip_addr(addr, &packet[3]); 1021 log_dbg("Create_connection to "); print_bd_addr(addr); log_dbg("\n"); 1022 conn = connection_for_address(addr); 1023 if (conn) { 1024 // if connection exists 1025 if (conn->state == OPEN) { 1026 // if OPEN, emit connection complete command 1027 hci_emit_connection_complete(conn); 1028 } 1029 // otherwise, just ignore 1030 return 0; // don't sent packet to controller 1031 1032 } else{ 1033 conn = create_connection_for_addr(addr); 1034 if (conn){ 1035 // create connection struct and register, state = SENT_CREATE_CONNECTION 1036 conn->state = SENT_CREATE_CONNECTION; 1037 } 1038 } 1039 } 1040 1041 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1042 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1043 } 1044 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1045 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1046 } 1047 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1048 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1049 } 1050 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1051 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 1052 } 1053 1054 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1055 if (hci_stack.remote_device_db){ 1056 bt_flip_addr(addr, &packet[3]); 1057 hci_stack.remote_device_db->delete_link_key(&addr); 1058 } 1059 } 1060 1061 hci_stack.num_cmd_packets--; 1062 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1063 } 1064 1065 /** 1066 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1067 */ 1068 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1069 va_list argptr; 1070 va_start(argptr, cmd); 1071 uint8_t * hci_cmd_buffer = hci_stack.hci_cmd_buffer; 1072 uint16_t size = hci_create_cmd_internal(hci_stack.hci_cmd_buffer, cmd, argptr); 1073 va_end(argptr); 1074 return hci_send_cmd_packet(hci_cmd_buffer, size); 1075 } 1076 1077 // Create various non-HCI events. 1078 // TODO: generalize, use table similar to hci_create_command 1079 1080 void hci_emit_state(){ 1081 uint8_t len = 3; 1082 uint8_t event[len]; 1083 event[0] = BTSTACK_EVENT_STATE; 1084 event[1] = len - 3; 1085 event[2] = hci_stack.state; 1086 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1087 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1088 } 1089 1090 void hci_emit_connection_complete(hci_connection_t *conn){ 1091 uint8_t len = 13; 1092 uint8_t event[len]; 1093 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1094 event[1] = len - 3; 1095 event[2] = 0; // status = OK 1096 bt_store_16(event, 3, conn->con_handle); 1097 bt_flip_addr(&event[5], conn->address); 1098 event[11] = 1; // ACL connection 1099 event[12] = 0; // encryption disabled 1100 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1101 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1102 } 1103 1104 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1105 uint8_t len = 6; 1106 uint8_t event[len]; 1107 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1108 event[1] = len - 3; 1109 event[2] = 0; // status = OK 1110 bt_store_16(event, 3, handle); 1111 event[5] = reason; 1112 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1113 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1114 } 1115 1116 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1117 uint8_t len = 4; 1118 uint8_t event[len]; 1119 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1120 event[1] = len - 2; 1121 bt_store_16(event, 2, conn->con_handle); 1122 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1123 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1124 } 1125 1126 void hci_emit_nr_connections_changed(){ 1127 uint8_t len = 3; 1128 uint8_t event[len]; 1129 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1130 event[1] = len - 2; 1131 event[2] = nr_hci_connections(); 1132 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1133 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1134 } 1135 1136 void hci_emit_hci_open_failed(){ 1137 uint8_t len = 2; 1138 uint8_t event[len]; 1139 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1140 event[1] = len - 2; 1141 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1142 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1143 } 1144 1145 1146 void hci_emit_btstack_version() { 1147 uint8_t len = 6; 1148 uint8_t event[len]; 1149 event[0] = BTSTACK_EVENT_VERSION; 1150 event[1] = len - 2; 1151 event[len++] = BTSTACK_MAJOR; 1152 event[len++] = BTSTACK_MINOR; 1153 bt_store_16(event, len, BTSTACK_REVISION); 1154 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1155 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1156 } 1157 1158 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1159 uint8_t len = 3; 1160 uint8_t event[len]; 1161 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1162 event[1] = len - 2; 1163 event[2] = enabled; 1164 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1165 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1166 } 1167 1168 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1169 uint16_t len = 2+1+6+248; 1170 uint8_t event[len]; 1171 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1172 event[1] = len - 2; 1173 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1174 bt_flip_addr(&event[3], *addr); 1175 memcpy(&event[9], name, 248); 1176 hci_dump_packet(HCI_EVENT_PACKET, 0, event, len); 1177 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1178 } 1179 1180 void hci_emit_discoverable_enabled(uint8_t enabled){ 1181 uint8_t len = 3; 1182 uint8_t event[len]; 1183 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1184 event[1] = len - 2; 1185 event[2] = enabled; 1186 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1187 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1188 } 1189