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 log_dbg("HCI_EVENT_LINK_KEY_REQUEST\n"); 447 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 448 if (!hci_stack.remote_device_db) break; 449 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 450 hci_run(); 451 // request already answered 452 return; 453 454 case HCI_EVENT_LINK_KEY_NOTIFICATION: 455 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 456 if (!hci_stack.remote_device_db) break; 457 bt_flip_addr(addr, &packet[2]); 458 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 459 // still forward event to allow dismiss of pairing dialog 460 break; 461 462 case HCI_EVENT_PIN_CODE_REQUEST: 463 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 464 break; 465 466 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 467 if (!hci_stack.remote_device_db) break; 468 if (packet[2]) break; // status not ok 469 bt_flip_addr(addr, &packet[3]); 470 // fix for invalid remote names - terminate on 0xff 471 for (i=0; i<248;i++){ 472 if (packet[9+i] == 0xff){ 473 packet[9+i] = 0; 474 break; 475 } 476 } 477 bzero(&device_name, sizeof(device_name_t)); 478 strncpy((char*) device_name, (char*) &packet[9], 248); 479 hci_stack.remote_device_db->put_name(&addr, &device_name); 480 break; 481 482 case HCI_EVENT_INQUIRY_RESULT: 483 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 484 if (!hci_stack.remote_device_db) break; 485 // first send inq result packet 486 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 487 // then send cached remote names 488 for (i=0; i<packet[2];i++){ 489 bt_flip_addr(addr, &packet[3+i*6]); 490 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 491 hci_emit_remote_name_cached(&addr, &device_name); 492 } 493 } 494 return; 495 496 case HCI_EVENT_DISCONNECTION_COMPLETE: 497 if (!packet[2]){ 498 handle = READ_BT_16(packet, 3); 499 hci_connection_t * conn = connection_for_handle(handle); 500 if (conn) { 501 hci_shutdown_connection(conn); 502 } 503 } 504 break; 505 506 case HCI_EVENT_HARDWARE_ERROR: 507 if(hci_stack.control->hw_error){ 508 (*hci_stack.control->hw_error)(); 509 } 510 break; 511 512 default: 513 break; 514 } 515 516 // handle BT initialization 517 if (hci_stack.state == HCI_STATE_INITIALIZING){ 518 // handle H4 synchronization loss on restart 519 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 520 // hci_stack.substate = 0; 521 // } 522 // handle normal init sequence 523 if (hci_stack.substate % 2){ 524 // odd: waiting for event 525 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 526 hci_stack.substate++; 527 } 528 } 529 } 530 531 // help with BT sleep 532 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 533 && hci_stack.substate == 1 534 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 535 hci_stack.substate++; 536 } 537 538 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 539 540 // execute main loop 541 hci_run(); 542 } 543 544 void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 545 switch (packet_type) { 546 case HCI_EVENT_PACKET: 547 event_handler(packet, size); 548 break; 549 case HCI_ACL_DATA_PACKET: 550 acl_handler(packet, size); 551 break; 552 default: 553 break; 554 } 555 } 556 557 /** Register HCI packet handlers */ 558 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 559 hci_stack.packet_handler = handler; 560 } 561 562 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t * remote_device_db){ 563 564 // reference to use transport layer implementation 565 hci_stack.hci_transport = transport; 566 567 // references to used control implementation 568 hci_stack.control = control; 569 570 // reference to used config 571 hci_stack.config = config; 572 573 // no connections yet 574 hci_stack.connections = NULL; 575 hci_stack.discoverable = 0; 576 577 // empty cmd buffer 578 hci_stack.hci_cmd_buffer = malloc(3+255); 579 580 // higher level handler 581 hci_stack.packet_handler = dummy_handler; 582 583 // store and open remote device db 584 hci_stack.remote_device_db = remote_device_db; 585 if (hci_stack.remote_device_db) { 586 hci_stack.remote_device_db->open(); 587 } 588 589 // register packet handlers with transport 590 transport->register_packet_handler(&packet_handler); 591 } 592 593 void hci_close(){ 594 // close remote device db 595 if (hci_stack.remote_device_db) { 596 hci_stack.remote_device_db->close(); 597 } 598 } 599 600 // State-Module-Driver overview 601 // state module low-level 602 // HCI_STATE_OFF off close 603 // HCI_STATE_INITIALIZING, on open 604 // HCI_STATE_WORKING, on open 605 // HCI_STATE_HALTING, on open 606 // HCI_STATE_SLEEPING, off/sleep close 607 // HCI_STATE_FALLING_ASLEEP on open 608 609 static int hci_power_control_on(void){ 610 611 // power on 612 int err = 0; 613 if (hci_stack.control && hci_stack.control->on){ 614 err = (*hci_stack.control->on)(hci_stack.config); 615 } 616 if (err){ 617 log_err( "POWER_ON failed\n"); 618 hci_emit_hci_open_failed(); 619 return err; 620 } 621 622 // open low-level device 623 err = hci_stack.hci_transport->open(hci_stack.config); 624 if (err){ 625 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 626 if (hci_stack.control && hci_stack.control->off){ 627 (*hci_stack.control->off)(hci_stack.config); 628 } 629 hci_emit_hci_open_failed(); 630 return err; 631 } 632 return 0; 633 } 634 635 static void hci_power_control_off(void){ 636 637 log_dbg("hci_power_control_off\n"); 638 639 // close low-level device 640 hci_stack.hci_transport->close(hci_stack.config); 641 642 log_dbg("hci_power_control_off - hci_transport closed\n"); 643 644 // power off 645 if (hci_stack.control && hci_stack.control->off){ 646 (*hci_stack.control->off)(hci_stack.config); 647 } 648 649 log_dbg("hci_power_control_off - control closed\n"); 650 651 hci_stack.state = HCI_STATE_OFF; 652 } 653 654 static void hci_power_control_sleep(void){ 655 656 log_dbg("hci_power_control_sleep\n"); 657 658 #if 0 659 // don't close serial port during sleep 660 661 // close low-level device 662 hci_stack.hci_transport->close(hci_stack.config); 663 #endif 664 665 // sleep mode 666 if (hci_stack.control && hci_stack.control->sleep){ 667 (*hci_stack.control->sleep)(hci_stack.config); 668 } 669 670 hci_stack.state = HCI_STATE_SLEEPING; 671 } 672 673 static int hci_power_control_wake(void){ 674 675 log_dbg("hci_power_control_wake\n"); 676 677 // wake on 678 if (hci_stack.control && hci_stack.control->wake){ 679 (*hci_stack.control->wake)(hci_stack.config); 680 } 681 682 #if 0 683 // open low-level device 684 int err = hci_stack.hci_transport->open(hci_stack.config); 685 if (err){ 686 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 687 if (hci_stack.control && hci_stack.control->off){ 688 (*hci_stack.control->off)(hci_stack.config); 689 } 690 hci_emit_hci_open_failed(); 691 return err; 692 } 693 #endif 694 695 return 0; 696 } 697 698 699 int hci_power_control(HCI_POWER_MODE power_mode){ 700 701 log_dbg("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 702 703 int err = 0; 704 switch (hci_stack.state){ 705 706 case HCI_STATE_OFF: 707 switch (power_mode){ 708 case HCI_POWER_ON: 709 err = hci_power_control_on(); 710 if (err) return err; 711 // set up state machine 712 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 713 hci_stack.state = HCI_STATE_INITIALIZING; 714 hci_stack.substate = 0; 715 break; 716 case HCI_POWER_OFF: 717 // do nothing 718 break; 719 case HCI_POWER_SLEEP: 720 // do nothing (with SLEEP == OFF) 721 break; 722 } 723 break; 724 725 case HCI_STATE_INITIALIZING: 726 switch (power_mode){ 727 case HCI_POWER_ON: 728 // do nothing 729 break; 730 case HCI_POWER_OFF: 731 // no connections yet, just turn it off 732 hci_power_control_off(); 733 break; 734 case HCI_POWER_SLEEP: 735 // no connections yet, just turn it off 736 hci_power_control_sleep(); 737 break; 738 } 739 break; 740 741 case HCI_STATE_WORKING: 742 switch (power_mode){ 743 case HCI_POWER_ON: 744 // do nothing 745 break; 746 case HCI_POWER_OFF: 747 // see hci_run 748 hci_stack.state = HCI_STATE_HALTING; 749 break; 750 case HCI_POWER_SLEEP: 751 // see hci_run 752 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 753 hci_stack.substate = 0; 754 break; 755 } 756 break; 757 758 case HCI_STATE_HALTING: 759 switch (power_mode){ 760 case HCI_POWER_ON: 761 // set up state machine 762 hci_stack.state = HCI_STATE_INITIALIZING; 763 hci_stack.substate = 0; 764 break; 765 case HCI_POWER_OFF: 766 // do nothing 767 break; 768 case HCI_POWER_SLEEP: 769 // see hci_run 770 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 771 hci_stack.substate = 0; 772 break; 773 } 774 break; 775 776 case HCI_STATE_FALLING_ASLEEP: 777 switch (power_mode){ 778 case HCI_POWER_ON: 779 // set up state machine 780 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 781 hci_stack.state = HCI_STATE_INITIALIZING; 782 hci_stack.substate = 0; 783 break; 784 case HCI_POWER_OFF: 785 // see hci_run 786 hci_stack.state = HCI_STATE_HALTING; 787 break; 788 case HCI_POWER_SLEEP: 789 // do nothing 790 break; 791 } 792 break; 793 794 case HCI_STATE_SLEEPING: 795 switch (power_mode){ 796 case HCI_POWER_ON: 797 err = hci_power_control_wake(); 798 if (err) return err; 799 // set up state machine 800 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 801 hci_stack.state = HCI_STATE_INITIALIZING; 802 hci_stack.substate = 0; 803 break; 804 case HCI_POWER_OFF: 805 hci_stack.state = HCI_STATE_HALTING; 806 break; 807 case HCI_POWER_SLEEP: 808 // do nothing 809 break; 810 } 811 break; 812 } 813 814 // create internal event 815 hci_emit_state(); 816 817 // trigger next/first action 818 hci_run(); 819 820 return 0; 821 } 822 823 void hci_discoverable_control(uint8_t enable){ 824 if (enable) enable = 1; // normalize argument 825 826 if (hci_stack.discoverable == enable){ 827 hci_emit_discoverable_enabled(hci_stack.discoverable); 828 return; 829 } 830 831 hci_send_cmd(&hci_write_scan_enable, 2 | enable); // 1 = inq scan, 2 = page scan 832 hci_stack.discoverable = enable; 833 } 834 835 void hci_run(){ 836 837 hci_connection_t * connection; 838 linked_item_t * it; 839 840 // send pending HCI commands 841 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 842 843 connection = (hci_connection_t *) it; 844 845 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 846 847 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 848 log_dbg("sending hci_accept_connection_request\n"); 849 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 850 connection->state = ACCEPTED_CONNECTION_REQUEST; 851 } 852 853 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 854 855 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 856 link_key_t link_key; 857 log_dbg("responding to link key request\n"); 858 if ( hci_stack.remote_device_db->get_link_key( &connection->address, &link_key)){ 859 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 860 } else { 861 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 862 } 863 connection->authentication_flags &= ~HANDLE_LINK_KEY_REQUEST; 864 } 865 } 866 867 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 868 869 switch (hci_stack.state){ 870 case HCI_STATE_INITIALIZING: 871 if (hci_stack.substate % 2) { 872 // odd: waiting for command completion 873 return; 874 } 875 switch (hci_stack.substate >> 1){ 876 case 0: // RESET 877 hci_send_cmd(&hci_reset); 878 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 879 // skip baud change 880 hci_stack.substate = 4; // >> 1 = 2 881 } 882 break; 883 case 1: // SEND BAUD CHANGE 884 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_cmd_buffer); 885 hci_send_cmd_packet(hci_stack.hci_cmd_buffer, 3 + hci_stack.hci_cmd_buffer[2]); 886 break; 887 case 2: // LOCAL BAUD CHANGE 888 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 889 hci_stack.substate += 2; 890 // break missing here for fall through 891 892 case 3: 893 // custom initialization 894 if (hci_stack.control && hci_stack.control->next_command){ 895 uint8_t * cmd = (*hci_stack.control->next_command)(hci_stack.config); 896 if (cmd) { 897 int size = 3 + cmd[2]; 898 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, cmd, size); 899 hci_stack.substate = 4; // more init commands 900 break; 901 } 902 printf("hci_run: init script done\n\r"); 903 } 904 // otherwise continue 905 hci_send_cmd(&hci_read_bd_addr); 906 break; 907 case 4: 908 hci_send_cmd(&hci_read_buffer_size); 909 break; 910 case 5: 911 // ca. 15 sec 912 hci_send_cmd(&hci_write_page_timeout, 0x6000); 913 break; 914 case 6: 915 hci_send_cmd(&hci_write_scan_enable, 2 | hci_stack.discoverable); // page scan 916 break; 917 case 7: 918 #ifndef EMBEDDED 919 { 920 char hostname[30]; 921 gethostname(hostname, 30); 922 hostname[29] = '\0'; 923 hci_send_cmd(&hci_write_local_name, hostname); 924 break; 925 } 926 case 8: 927 #ifdef USE_BLUETOOL 928 hci_send_cmd(&hci_write_class_of_device, 0x007a020c); // Smartphone 929 break; 930 931 case 9: 932 #endif 933 #endif 934 // done. 935 hci_stack.state = HCI_STATE_WORKING; 936 hci_emit_state(); 937 break; 938 default: 939 break; 940 } 941 hci_stack.substate++; 942 break; 943 944 case HCI_STATE_HALTING: 945 946 log_dbg("HCI_STATE_HALTING\n"); 947 // close all open connections 948 connection = (hci_connection_t *) hci_stack.connections; 949 if (connection){ 950 951 // send disconnect 952 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 953 954 log_dbg("HCI_STATE_HALTING, connection %lu, handle %u\n", (uintptr_t) connection, connection->con_handle); 955 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 956 957 // send disconnected event right away - causes higher layer connections to get closed, too. 958 hci_shutdown_connection(connection); 959 return; 960 } 961 log_dbg("HCI_STATE_HALTING, calling off\n"); 962 963 // switch mode 964 hci_power_control_off(); 965 966 log_dbg("HCI_STATE_HALTING, emitting state\n"); 967 hci_emit_state(); 968 log_dbg("HCI_STATE_HALTING, done\n"); 969 break; 970 971 case HCI_STATE_FALLING_ASLEEP: 972 switch(hci_stack.substate) { 973 case 0: 974 log_dbg("HCI_STATE_FALLING_ASLEEP\n"); 975 // close all open connections 976 connection = (hci_connection_t *) hci_stack.connections; 977 if (connection){ 978 979 // send disconnect 980 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 981 982 log_dbg("HCI_STATE_FALLING_ASLEEP, connection %lu, handle %u\n", (uintptr_t) connection, connection->con_handle); 983 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 984 985 // send disconnected event right away - causes higher layer connections to get closed, too. 986 hci_shutdown_connection(connection); 987 return; 988 } 989 990 // disable page and inquiry scan 991 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 992 993 log_dbg("HCI_STATE_HALTING, disabling inq & page scans\n"); 994 hci_send_cmd(&hci_write_scan_enable, 0); // none 995 996 // continue in next sub state 997 hci_stack.substate++; 998 break; 999 case 1: 1000 // wait for command complete "hci_write_scan_enable" in event_handler(); 1001 break; 1002 case 2: 1003 log_dbg("HCI_STATE_HALTING, calling sleep\n"); 1004 // switch mode 1005 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1006 hci_emit_state(); 1007 default: 1008 break; 1009 } 1010 break; 1011 1012 default: 1013 break; 1014 } 1015 } 1016 1017 int hci_send_cmd_packet(uint8_t *packet, int size){ 1018 bd_addr_t addr; 1019 hci_connection_t * conn; 1020 // house-keeping 1021 1022 // create_connection? 1023 if (IS_COMMAND(packet, hci_create_connection)){ 1024 bt_flip_addr(addr, &packet[3]); 1025 log_dbg("Create_connection to "); print_bd_addr(addr); log_dbg("\n"); 1026 conn = connection_for_address(addr); 1027 if (conn) { 1028 // if connection exists 1029 if (conn->state == OPEN) { 1030 // if OPEN, emit connection complete command 1031 hci_emit_connection_complete(conn); 1032 } 1033 // otherwise, just ignore 1034 return 0; // don't sent packet to controller 1035 1036 } else{ 1037 conn = create_connection_for_addr(addr); 1038 if (conn){ 1039 // create connection struct and register, state = SENT_CREATE_CONNECTION 1040 conn->state = SENT_CREATE_CONNECTION; 1041 } 1042 } 1043 } 1044 1045 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1046 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1047 } 1048 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1049 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1050 } 1051 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1052 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1053 } 1054 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1055 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 1056 } 1057 1058 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1059 if (hci_stack.remote_device_db){ 1060 bt_flip_addr(addr, &packet[3]); 1061 hci_stack.remote_device_db->delete_link_key(&addr); 1062 } 1063 } 1064 1065 hci_stack.num_cmd_packets--; 1066 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1067 } 1068 1069 /** 1070 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1071 */ 1072 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1073 va_list argptr; 1074 va_start(argptr, cmd); 1075 uint8_t * hci_cmd_buffer = hci_stack.hci_cmd_buffer; 1076 uint16_t size = hci_create_cmd_internal(hci_stack.hci_cmd_buffer, cmd, argptr); 1077 va_end(argptr); 1078 return hci_send_cmd_packet(hci_cmd_buffer, size); 1079 } 1080 1081 // Create various non-HCI events. 1082 // TODO: generalize, use table similar to hci_create_command 1083 1084 void hci_emit_state(){ 1085 uint8_t len = 3; 1086 uint8_t event[len]; 1087 event[0] = BTSTACK_EVENT_STATE; 1088 event[1] = len - 3; 1089 event[2] = hci_stack.state; 1090 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1091 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1092 } 1093 1094 void hci_emit_connection_complete(hci_connection_t *conn){ 1095 uint8_t len = 13; 1096 uint8_t event[len]; 1097 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1098 event[1] = len - 3; 1099 event[2] = 0; // status = OK 1100 bt_store_16(event, 3, conn->con_handle); 1101 bt_flip_addr(&event[5], conn->address); 1102 event[11] = 1; // ACL connection 1103 event[12] = 0; // encryption disabled 1104 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1105 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1106 } 1107 1108 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1109 uint8_t len = 6; 1110 uint8_t event[len]; 1111 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1112 event[1] = len - 3; 1113 event[2] = 0; // status = OK 1114 bt_store_16(event, 3, handle); 1115 event[5] = reason; 1116 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1117 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1118 } 1119 1120 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1121 uint8_t len = 4; 1122 uint8_t event[len]; 1123 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1124 event[1] = len - 2; 1125 bt_store_16(event, 2, conn->con_handle); 1126 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1127 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1128 } 1129 1130 void hci_emit_nr_connections_changed(){ 1131 uint8_t len = 3; 1132 uint8_t event[len]; 1133 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1134 event[1] = len - 2; 1135 event[2] = nr_hci_connections(); 1136 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1137 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1138 } 1139 1140 void hci_emit_hci_open_failed(){ 1141 uint8_t len = 2; 1142 uint8_t event[len]; 1143 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1144 event[1] = len - 2; 1145 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1146 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1147 } 1148 1149 1150 void hci_emit_btstack_version() { 1151 uint8_t len = 6; 1152 uint8_t event[len]; 1153 event[0] = BTSTACK_EVENT_VERSION; 1154 event[1] = len - 2; 1155 event[len++] = BTSTACK_MAJOR; 1156 event[len++] = BTSTACK_MINOR; 1157 bt_store_16(event, len, BTSTACK_REVISION); 1158 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1159 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1160 } 1161 1162 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1163 uint8_t len = 3; 1164 uint8_t event[len]; 1165 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1166 event[1] = len - 2; 1167 event[2] = enabled; 1168 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1169 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1170 } 1171 1172 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1173 uint16_t len = 2+1+6+248; 1174 uint8_t event[len]; 1175 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1176 event[1] = len - 2; 1177 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1178 bt_flip_addr(&event[3], *addr); 1179 memcpy(&event[9], name, 248); 1180 hci_dump_packet(HCI_EVENT_PACKET, 0, event, len); 1181 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1182 } 1183 1184 void hci_emit_discoverable_enabled(uint8_t enabled){ 1185 uint8_t len = 3; 1186 uint8_t event[len]; 1187 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1188 event[1] = len - 2; 1189 event[2] = enabled; 1190 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1191 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1192 } 1193