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