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 <btstack/hci_cmds.h> 53 #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", acl_length, 275 // conn->acl_recombination_pos, conn->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 // log_err( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 299 300 // compare fragment size to L2CAP packet size 301 if (acl_length >= l2cap_length + 4){ 302 303 // forward fragment as L2CAP packet 304 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 305 306 } else { 307 // store first fragment and tweak acl length for complete package 308 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 309 conn->acl_recombination_pos = acl_length + 4; 310 conn->acl_recombination_length = l2cap_length; 311 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 312 } 313 break; 314 315 } 316 default: 317 log_err( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 318 return; 319 } 320 321 // execute main loop 322 hci_run(); 323 } 324 325 static void hci_shutdown_connection(hci_connection_t *conn){ 326 log_dbg("Connection closed: handle %u, ", conn->con_handle); 327 print_bd_addr( conn->address ); 328 log_dbg("\n"); 329 330 // cancel all l2cap connections 331 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 332 333 #ifdef HAVE_TIME 334 run_loop_remove_timer(&conn->timeout); 335 #endif 336 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 337 free( conn ); 338 339 // now it's gone 340 hci_emit_nr_connections_changed(); 341 } 342 343 // avoid huge local variables 344 static device_name_t device_name; 345 static void event_handler(uint8_t *packet, int size){ 346 bd_addr_t addr; 347 hci_con_handle_t handle; 348 hci_connection_t * conn; 349 int i; 350 351 switch (packet[0]) { 352 353 case HCI_EVENT_COMMAND_COMPLETE: 354 // get num cmd packets 355 // log_dbg("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]); 356 hci_stack.num_cmd_packets = packet[2]; 357 358 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 359 // from offset 5 360 // status 361 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 362 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 363 // ignore: SCO data packet len (8) 364 hci_stack.total_num_acl_packets = packet[9]; 365 // ignore: total num SCO packets 366 if (hci_stack.state == HCI_STATE_INITIALIZING){ 367 log_dbg("hci_read_buffer_size: size %u, count %u\n", hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 368 } 369 } 370 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 371 hci_emit_discoverable_enabled(hci_stack.discoverable); 372 } 373 break; 374 375 case HCI_EVENT_COMMAND_STATUS: 376 // get num cmd packets 377 // log_dbg("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]); 378 hci_stack.num_cmd_packets = packet[3]; 379 break; 380 381 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 382 for (i=0; i<packet[2];i++){ 383 handle = READ_BT_16(packet, 3 + 2*i); 384 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 385 conn = connection_for_handle(handle); 386 if (!conn){ 387 log_err("hci_number_completed_packet lists unused con handle %u\n", handle); 388 continue; 389 } 390 conn->num_acl_packets_sent -= num_packets; 391 // log_dbg("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 392 } 393 break; 394 395 case HCI_EVENT_CONNECTION_REQUEST: 396 bt_flip_addr(addr, &packet[2]); 397 // TODO: eval COD 8-10 398 uint8_t link_type = packet[11]; 399 log_dbg("Connection_incoming: "); print_bd_addr(addr); log_dbg(", type %u\n", link_type); 400 if (link_type == 1) { // ACL 401 conn = connection_for_address(addr); 402 if (!conn) { 403 conn = create_connection_for_addr(addr); 404 } 405 // TODO: check for malloc failure 406 conn->state = RECEIVED_CONNECTION_REQUEST; 407 hci_run(); 408 } else { 409 // TODO: decline request 410 } 411 break; 412 413 case HCI_EVENT_CONNECTION_COMPLETE: 414 // Connection management 415 bt_flip_addr(addr, &packet[5]); 416 log_dbg("Connection_complete (status=%u)", packet[2]); print_bd_addr(addr); log_dbg("\n"); 417 conn = connection_for_address(addr); 418 if (conn) { 419 if (!packet[2]){ 420 conn->state = OPEN; 421 conn->con_handle = READ_BT_16(packet, 3); 422 423 #ifdef HAVE_TIME 424 gettimeofday(&conn->timestamp, NULL); 425 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 426 run_loop_add_timer(&conn->timeout); 427 #endif 428 log_dbg("New connection: handle %u, ", conn->con_handle); 429 print_bd_addr( conn->address ); 430 log_dbg("\n"); 431 432 hci_emit_nr_connections_changed(); 433 } else { 434 // connection failed, remove entry 435 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 436 free( conn ); 437 438 // if authentication error, also delete link key 439 if (packet[2] == 0x05) { 440 hci_drop_link_key_for_bd_addr(&addr); 441 } 442 } 443 } 444 break; 445 446 case HCI_EVENT_LINK_KEY_REQUEST: 447 log_dbg("HCI_EVENT_LINK_KEY_REQUEST\n"); 448 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 449 if (!hci_stack.remote_device_db) break; 450 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 451 hci_run(); 452 // request already answered 453 return; 454 455 case HCI_EVENT_LINK_KEY_NOTIFICATION: 456 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 457 if (!hci_stack.remote_device_db) break; 458 bt_flip_addr(addr, &packet[2]); 459 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 460 // still forward event to allow dismiss of pairing dialog 461 break; 462 463 case HCI_EVENT_PIN_CODE_REQUEST: 464 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 465 break; 466 467 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 468 if (!hci_stack.remote_device_db) break; 469 if (packet[2]) break; // status not ok 470 bt_flip_addr(addr, &packet[3]); 471 // fix for invalid remote names - terminate on 0xff 472 for (i=0; i<248;i++){ 473 if (packet[9+i] == 0xff){ 474 packet[9+i] = 0; 475 break; 476 } 477 } 478 bzero(&device_name, sizeof(device_name_t)); 479 strncpy((char*) device_name, (char*) &packet[9], 248); 480 hci_stack.remote_device_db->put_name(&addr, &device_name); 481 break; 482 483 case HCI_EVENT_INQUIRY_RESULT: 484 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 485 if (!hci_stack.remote_device_db) break; 486 // first send inq result packet 487 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 488 // then send cached remote names 489 for (i=0; i<packet[2];i++){ 490 bt_flip_addr(addr, &packet[3+i*6]); 491 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 492 hci_emit_remote_name_cached(&addr, &device_name); 493 } 494 } 495 return; 496 497 case HCI_EVENT_DISCONNECTION_COMPLETE: 498 if (!packet[2]){ 499 handle = READ_BT_16(packet, 3); 500 hci_connection_t * conn = connection_for_handle(handle); 501 if (conn) { 502 hci_shutdown_connection(conn); 503 } 504 } 505 break; 506 507 case HCI_EVENT_HARDWARE_ERROR: 508 if(hci_stack.control->hw_error){ 509 (*hci_stack.control->hw_error)(); 510 } 511 break; 512 513 default: 514 break; 515 } 516 517 // handle BT initialization 518 if (hci_stack.state == HCI_STATE_INITIALIZING){ 519 // handle H4 synchronization loss on restart 520 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 521 // hci_stack.substate = 0; 522 // } 523 // handle normal init sequence 524 if (hci_stack.substate % 2){ 525 // odd: waiting for event 526 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 527 hci_stack.substate++; 528 } 529 } 530 } 531 532 // help with BT sleep 533 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 534 && hci_stack.substate == 1 535 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 536 hci_stack.substate++; 537 } 538 539 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 540 541 // execute main loop 542 hci_run(); 543 } 544 545 void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 546 switch (packet_type) { 547 case HCI_EVENT_PACKET: 548 event_handler(packet, size); 549 break; 550 case HCI_ACL_DATA_PACKET: 551 acl_handler(packet, size); 552 break; 553 default: 554 break; 555 } 556 } 557 558 /** Register HCI packet handlers */ 559 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 560 hci_stack.packet_handler = handler; 561 } 562 563 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t * remote_device_db){ 564 565 // reference to use transport layer implementation 566 hci_stack.hci_transport = transport; 567 568 // references to used control implementation 569 hci_stack.control = control; 570 571 // reference to used config 572 hci_stack.config = config; 573 574 // no connections yet 575 hci_stack.connections = NULL; 576 hci_stack.discoverable = 0; 577 578 // empty cmd buffer 579 hci_stack.hci_cmd_buffer = malloc(3+255); 580 581 // higher level handler 582 hci_stack.packet_handler = dummy_handler; 583 584 // store and open remote device db 585 hci_stack.remote_device_db = remote_device_db; 586 if (hci_stack.remote_device_db) { 587 hci_stack.remote_device_db->open(); 588 } 589 590 // register packet handlers with transport 591 transport->register_packet_handler(&packet_handler); 592 } 593 594 void hci_close(){ 595 // close remote device db 596 if (hci_stack.remote_device_db) { 597 hci_stack.remote_device_db->close(); 598 } 599 } 600 601 // State-Module-Driver overview 602 // state module low-level 603 // HCI_STATE_OFF off close 604 // HCI_STATE_INITIALIZING, on open 605 // HCI_STATE_WORKING, on open 606 // HCI_STATE_HALTING, on open 607 // HCI_STATE_SLEEPING, off/sleep close 608 // HCI_STATE_FALLING_ASLEEP on open 609 610 static int hci_power_control_on(void){ 611 612 // power on 613 int err = 0; 614 if (hci_stack.control && hci_stack.control->on){ 615 err = (*hci_stack.control->on)(hci_stack.config); 616 } 617 if (err){ 618 log_err( "POWER_ON failed\n"); 619 hci_emit_hci_open_failed(); 620 return err; 621 } 622 623 // open low-level device 624 err = hci_stack.hci_transport->open(hci_stack.config); 625 if (err){ 626 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 627 if (hci_stack.control && hci_stack.control->off){ 628 (*hci_stack.control->off)(hci_stack.config); 629 } 630 hci_emit_hci_open_failed(); 631 return err; 632 } 633 return 0; 634 } 635 636 static void hci_power_control_off(void){ 637 638 log_dbg("hci_power_control_off\n"); 639 640 // close low-level device 641 hci_stack.hci_transport->close(hci_stack.config); 642 643 log_dbg("hci_power_control_off - hci_transport closed\n"); 644 645 // power off 646 if (hci_stack.control && hci_stack.control->off){ 647 (*hci_stack.control->off)(hci_stack.config); 648 } 649 650 log_dbg("hci_power_control_off - control closed\n"); 651 652 hci_stack.state = HCI_STATE_OFF; 653 } 654 655 static void hci_power_control_sleep(void){ 656 657 log_dbg("hci_power_control_sleep\n"); 658 659 #if 0 660 // don't close serial port during sleep 661 662 // close low-level device 663 hci_stack.hci_transport->close(hci_stack.config); 664 #endif 665 666 // sleep mode 667 if (hci_stack.control && hci_stack.control->sleep){ 668 (*hci_stack.control->sleep)(hci_stack.config); 669 } 670 671 hci_stack.state = HCI_STATE_SLEEPING; 672 } 673 674 static int hci_power_control_wake(void){ 675 676 log_dbg("hci_power_control_wake\n"); 677 678 // wake on 679 if (hci_stack.control && hci_stack.control->wake){ 680 (*hci_stack.control->wake)(hci_stack.config); 681 } 682 683 #if 0 684 // open low-level device 685 int err = hci_stack.hci_transport->open(hci_stack.config); 686 if (err){ 687 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 688 if (hci_stack.control && hci_stack.control->off){ 689 (*hci_stack.control->off)(hci_stack.config); 690 } 691 hci_emit_hci_open_failed(); 692 return err; 693 } 694 #endif 695 696 return 0; 697 } 698 699 700 int hci_power_control(HCI_POWER_MODE power_mode){ 701 702 log_dbg("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 703 704 int err = 0; 705 switch (hci_stack.state){ 706 707 case HCI_STATE_OFF: 708 switch (power_mode){ 709 case HCI_POWER_ON: 710 err = hci_power_control_on(); 711 if (err) return err; 712 // set up state machine 713 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 714 hci_stack.state = HCI_STATE_INITIALIZING; 715 hci_stack.substate = 0; 716 break; 717 case HCI_POWER_OFF: 718 // do nothing 719 break; 720 case HCI_POWER_SLEEP: 721 // do nothing (with SLEEP == OFF) 722 break; 723 } 724 break; 725 726 case HCI_STATE_INITIALIZING: 727 switch (power_mode){ 728 case HCI_POWER_ON: 729 // do nothing 730 break; 731 case HCI_POWER_OFF: 732 // no connections yet, just turn it off 733 hci_power_control_off(); 734 break; 735 case HCI_POWER_SLEEP: 736 // no connections yet, just turn it off 737 hci_power_control_sleep(); 738 break; 739 } 740 break; 741 742 case HCI_STATE_WORKING: 743 switch (power_mode){ 744 case HCI_POWER_ON: 745 // do nothing 746 break; 747 case HCI_POWER_OFF: 748 // see hci_run 749 hci_stack.state = HCI_STATE_HALTING; 750 break; 751 case HCI_POWER_SLEEP: 752 // see hci_run 753 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 754 hci_stack.substate = 0; 755 break; 756 } 757 break; 758 759 case HCI_STATE_HALTING: 760 switch (power_mode){ 761 case HCI_POWER_ON: 762 // set up state machine 763 hci_stack.state = HCI_STATE_INITIALIZING; 764 hci_stack.substate = 0; 765 break; 766 case HCI_POWER_OFF: 767 // do nothing 768 break; 769 case HCI_POWER_SLEEP: 770 // see hci_run 771 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 772 hci_stack.substate = 0; 773 break; 774 } 775 break; 776 777 case HCI_STATE_FALLING_ASLEEP: 778 switch (power_mode){ 779 case HCI_POWER_ON: 780 // set up state machine 781 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 782 hci_stack.state = HCI_STATE_INITIALIZING; 783 hci_stack.substate = 0; 784 break; 785 case HCI_POWER_OFF: 786 // see hci_run 787 hci_stack.state = HCI_STATE_HALTING; 788 break; 789 case HCI_POWER_SLEEP: 790 // do nothing 791 break; 792 } 793 break; 794 795 case HCI_STATE_SLEEPING: 796 switch (power_mode){ 797 case HCI_POWER_ON: 798 err = hci_power_control_wake(); 799 if (err) return err; 800 // set up state machine 801 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 802 hci_stack.state = HCI_STATE_INITIALIZING; 803 hci_stack.substate = 0; 804 break; 805 case HCI_POWER_OFF: 806 hci_stack.state = HCI_STATE_HALTING; 807 break; 808 case HCI_POWER_SLEEP: 809 // do nothing 810 break; 811 } 812 break; 813 } 814 815 // create internal event 816 hci_emit_state(); 817 818 // trigger next/first action 819 hci_run(); 820 821 return 0; 822 } 823 824 void hci_discoverable_control(uint8_t enable){ 825 if (enable) enable = 1; // normalize argument 826 827 if (hci_stack.discoverable == enable){ 828 hci_emit_discoverable_enabled(hci_stack.discoverable); 829 return; 830 } 831 832 hci_send_cmd(&hci_write_scan_enable, 2 | enable); // 1 = inq scan, 2 = page scan 833 hci_stack.discoverable = enable; 834 } 835 836 void hci_run(){ 837 838 hci_connection_t * connection; 839 linked_item_t * it; 840 841 // send pending HCI commands 842 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 843 844 connection = (hci_connection_t *) it; 845 846 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 847 848 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 849 log_dbg("sending hci_accept_connection_request\n"); 850 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 851 connection->state = ACCEPTED_CONNECTION_REQUEST; 852 } 853 854 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 855 856 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 857 link_key_t link_key; 858 log_dbg("responding to link key request\n"); 859 if ( hci_stack.remote_device_db->get_link_key( &connection->address, &link_key)){ 860 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 861 } else { 862 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 863 } 864 connection->authentication_flags &= ~HANDLE_LINK_KEY_REQUEST; 865 } 866 } 867 868 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 869 870 switch (hci_stack.state){ 871 case HCI_STATE_INITIALIZING: 872 if (hci_stack.substate % 2) { 873 // odd: waiting for command completion 874 return; 875 } 876 switch (hci_stack.substate >> 1){ 877 case 0: // RESET 878 hci_send_cmd(&hci_reset); 879 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 880 // skip baud change 881 hci_stack.substate = 4; // >> 1 = 2 882 } 883 break; 884 case 1: // SEND BAUD CHANGE 885 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_cmd_buffer); 886 hci_send_cmd_packet(hci_stack.hci_cmd_buffer, 3 + hci_stack.hci_cmd_buffer[2]); 887 break; 888 case 2: // LOCAL BAUD CHANGE 889 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 890 hci_stack.substate += 2; 891 // break missing here for fall through 892 893 case 3: 894 // custom initialization 895 if (hci_stack.control && hci_stack.control->next_command){ 896 uint8_t * cmd = (*hci_stack.control->next_command)(hci_stack.config); 897 if (cmd) { 898 int size = 3 + cmd[2]; 899 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, cmd, size); 900 hci_stack.substate = 4; // more init commands 901 break; 902 } 903 printf("hci_run: init script done\n\r"); 904 } 905 // otherwise continue 906 hci_send_cmd(&hci_read_bd_addr); 907 break; 908 case 4: 909 hci_send_cmd(&hci_read_buffer_size); 910 break; 911 case 5: 912 // ca. 15 sec 913 hci_send_cmd(&hci_write_page_timeout, 0x6000); 914 break; 915 case 6: 916 hci_send_cmd(&hci_write_scan_enable, 2 | hci_stack.discoverable); // page scan 917 break; 918 case 7: 919 #ifndef EMBEDDED 920 { 921 char hostname[30]; 922 gethostname(hostname, 30); 923 hostname[29] = '\0'; 924 hci_send_cmd(&hci_write_local_name, hostname); 925 break; 926 } 927 case 8: 928 #ifdef USE_BLUETOOL 929 hci_send_cmd(&hci_write_class_of_device, 0x007a020c); // Smartphone 930 break; 931 932 case 9: 933 #endif 934 #endif 935 // done. 936 hci_stack.state = HCI_STATE_WORKING; 937 hci_emit_state(); 938 break; 939 default: 940 break; 941 } 942 hci_stack.substate++; 943 break; 944 945 case HCI_STATE_HALTING: 946 947 log_dbg("HCI_STATE_HALTING\n"); 948 // close all open connections 949 connection = (hci_connection_t *) hci_stack.connections; 950 if (connection){ 951 952 // send disconnect 953 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 954 955 log_dbg("HCI_STATE_HALTING, connection %lu, handle %u\n", (uintptr_t) connection, connection->con_handle); 956 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 957 958 // send disconnected event right away - causes higher layer connections to get closed, too. 959 hci_shutdown_connection(connection); 960 return; 961 } 962 log_dbg("HCI_STATE_HALTING, calling off\n"); 963 964 // switch mode 965 hci_power_control_off(); 966 967 log_dbg("HCI_STATE_HALTING, emitting state\n"); 968 hci_emit_state(); 969 log_dbg("HCI_STATE_HALTING, done\n"); 970 break; 971 972 case HCI_STATE_FALLING_ASLEEP: 973 switch(hci_stack.substate) { 974 case 0: 975 log_dbg("HCI_STATE_FALLING_ASLEEP\n"); 976 // close all open connections 977 connection = (hci_connection_t *) hci_stack.connections; 978 if (connection){ 979 980 // send disconnect 981 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 982 983 log_dbg("HCI_STATE_FALLING_ASLEEP, connection %lu, handle %u\n", (uintptr_t) connection, connection->con_handle); 984 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 985 986 // send disconnected event right away - causes higher layer connections to get closed, too. 987 hci_shutdown_connection(connection); 988 return; 989 } 990 991 // disable page and inquiry scan 992 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 993 994 log_dbg("HCI_STATE_HALTING, disabling inq & page scans\n"); 995 hci_send_cmd(&hci_write_scan_enable, 0); // none 996 997 // continue in next sub state 998 hci_stack.substate++; 999 break; 1000 case 1: 1001 // wait for command complete "hci_write_scan_enable" in event_handler(); 1002 break; 1003 case 2: 1004 log_dbg("HCI_STATE_HALTING, calling sleep\n"); 1005 // switch mode 1006 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1007 hci_emit_state(); 1008 default: 1009 break; 1010 } 1011 break; 1012 1013 default: 1014 break; 1015 } 1016 } 1017 1018 int hci_send_cmd_packet(uint8_t *packet, int size){ 1019 bd_addr_t addr; 1020 hci_connection_t * conn; 1021 // house-keeping 1022 1023 // create_connection? 1024 if (IS_COMMAND(packet, hci_create_connection)){ 1025 bt_flip_addr(addr, &packet[3]); 1026 log_dbg("Create_connection to "); print_bd_addr(addr); log_dbg("\n"); 1027 conn = connection_for_address(addr); 1028 if (conn) { 1029 // if connection exists 1030 if (conn->state == OPEN) { 1031 // if OPEN, emit connection complete command 1032 hci_emit_connection_complete(conn); 1033 } 1034 // otherwise, just ignore 1035 return 0; // don't sent packet to controller 1036 1037 } else{ 1038 conn = create_connection_for_addr(addr); 1039 if (conn){ 1040 // create connection struct and register, state = SENT_CREATE_CONNECTION 1041 conn->state = SENT_CREATE_CONNECTION; 1042 } 1043 } 1044 } 1045 1046 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1047 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1048 } 1049 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1050 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1051 } 1052 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1053 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1054 } 1055 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1056 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 1057 } 1058 1059 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1060 if (hci_stack.remote_device_db){ 1061 bt_flip_addr(addr, &packet[3]); 1062 hci_stack.remote_device_db->delete_link_key(&addr); 1063 } 1064 } 1065 1066 hci_stack.num_cmd_packets--; 1067 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1068 } 1069 1070 /** 1071 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1072 */ 1073 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1074 va_list argptr; 1075 va_start(argptr, cmd); 1076 uint8_t * hci_cmd_buffer = hci_stack.hci_cmd_buffer; 1077 uint16_t size = hci_create_cmd_internal(hci_stack.hci_cmd_buffer, cmd, argptr); 1078 va_end(argptr); 1079 return hci_send_cmd_packet(hci_cmd_buffer, size); 1080 } 1081 1082 // Create various non-HCI events. 1083 // TODO: generalize, use table similar to hci_create_command 1084 1085 void hci_emit_state(){ 1086 uint8_t len = 3; 1087 uint8_t event[len]; 1088 event[0] = BTSTACK_EVENT_STATE; 1089 event[1] = len - 3; 1090 event[2] = hci_stack.state; 1091 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1092 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1093 } 1094 1095 void hci_emit_connection_complete(hci_connection_t *conn){ 1096 uint8_t len = 13; 1097 uint8_t event[len]; 1098 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1099 event[1] = len - 3; 1100 event[2] = 0; // status = OK 1101 bt_store_16(event, 3, conn->con_handle); 1102 bt_flip_addr(&event[5], conn->address); 1103 event[11] = 1; // ACL connection 1104 event[12] = 0; // encryption disabled 1105 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1106 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1107 } 1108 1109 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1110 uint8_t len = 6; 1111 uint8_t event[len]; 1112 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1113 event[1] = len - 3; 1114 event[2] = 0; // status = OK 1115 bt_store_16(event, 3, handle); 1116 event[5] = reason; 1117 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1118 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1119 } 1120 1121 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1122 uint8_t len = 4; 1123 uint8_t event[len]; 1124 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1125 event[1] = len - 2; 1126 bt_store_16(event, 2, conn->con_handle); 1127 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1128 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1129 } 1130 1131 void hci_emit_nr_connections_changed(){ 1132 uint8_t len = 3; 1133 uint8_t event[len]; 1134 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1135 event[1] = len - 2; 1136 event[2] = nr_hci_connections(); 1137 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1138 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1139 } 1140 1141 void hci_emit_hci_open_failed(){ 1142 uint8_t len = 2; 1143 uint8_t event[len]; 1144 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1145 event[1] = len - 2; 1146 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1147 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1148 } 1149 1150 1151 void hci_emit_btstack_version() { 1152 uint8_t len = 6; 1153 uint8_t event[len]; 1154 event[0] = BTSTACK_EVENT_VERSION; 1155 event[1] = len - 2; 1156 event[len++] = BTSTACK_MAJOR; 1157 event[len++] = BTSTACK_MINOR; 1158 bt_store_16(event, len, BTSTACK_REVISION); 1159 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1160 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1161 } 1162 1163 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1164 uint8_t len = 3; 1165 uint8_t event[len]; 1166 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1167 event[1] = len - 2; 1168 event[2] = enabled; 1169 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1170 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1171 } 1172 1173 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1174 uint16_t len = 2+1+6+248; 1175 uint8_t event[len]; 1176 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1177 event[1] = len - 2; 1178 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1179 bt_flip_addr(&event[3], *addr); 1180 memcpy(&event[9], name, 248); 1181 hci_dump_packet(HCI_EVENT_PACKET, 0, event, len); 1182 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1183 } 1184 1185 void hci_emit_discoverable_enabled(uint8_t enabled){ 1186 uint8_t len = 3; 1187 uint8_t event[len]; 1188 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1189 event[1] = len - 2; 1190 event[2] = enabled; 1191 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1192 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1193 } 1194