1 /* 2 * Copyright (C) 2009 by Matthias Ringwald 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 20 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 21 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 24 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 27 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 */ 31 32 /* 33 * hci.c 34 * 35 * Created by Matthias Ringwald on 4/29/09. 36 * 37 */ 38 39 #include "hci.h" 40 41 #include <unistd.h> 42 #include <stdarg.h> 43 #include <string.h> 44 #include <stdio.h> 45 46 #include "debug.h" 47 #include "hci_dump.h" 48 49 #include "../include/btstack/hci_cmds.h" 50 #include "../include/btstack/version.h" 51 52 // temp 53 #include "l2cap.h" 54 55 #define HCI_CONNECTION_TIMEOUT_MS 10000 56 57 // the STACK is here 58 static hci_stack_t hci_stack; 59 60 /** 61 * get connection for a given handle 62 * 63 * @return connection OR NULL, if not found 64 */ 65 hci_connection_t * connection_for_handle(hci_con_handle_t con_handle){ 66 linked_item_t *it; 67 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 68 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 69 return (hci_connection_t *) it; 70 } 71 } 72 return NULL; 73 } 74 75 static void hci_connection_timeout_handler(timer_source_t *timer){ 76 hci_connection_t * connection = linked_item_get_user(&timer->item); 77 struct timeval tv; 78 gettimeofday(&tv, NULL); 79 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 80 // connections might be timed out 81 hci_emit_l2cap_check_timeout(connection); 82 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 83 } else { 84 // next timeout check at 85 timer->timeout.tv_sec = connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000; 86 } 87 run_loop_add_timer(timer); 88 } 89 90 static void hci_connection_timestamp(hci_connection_t *connection){ 91 gettimeofday(&connection->timestamp, NULL); 92 } 93 94 /** 95 * create connection for given address 96 * 97 * @return connection OR NULL, if not found 98 */ 99 static hci_connection_t * create_connection_for_addr(bd_addr_t addr){ 100 hci_connection_t * conn = malloc( sizeof(hci_connection_t) ); 101 if (!conn) return NULL; 102 BD_ADDR_COPY(conn->address, addr); 103 conn->con_handle = 0xffff; 104 conn->authentication_flags = 0; 105 linked_item_set_user(&conn->timeout.item, conn); 106 conn->timeout.process = hci_connection_timeout_handler; 107 hci_connection_timestamp(conn); 108 conn->acl_recombination_length = 0; 109 conn->acl_recombination_pos = 0; 110 conn->num_acl_packets_sent = 0; 111 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 112 return conn; 113 } 114 115 /** 116 * get connection for given address 117 * 118 * @return connection OR NULL, if not found 119 */ 120 static hci_connection_t * connection_for_address(bd_addr_t address){ 121 linked_item_t *it; 122 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 123 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 124 return (hci_connection_t *) it; 125 } 126 } 127 return NULL; 128 } 129 130 /** 131 * add authentication flags and reset timer 132 */ 133 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 134 bd_addr_t addr; 135 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 136 hci_connection_t * conn = connection_for_address(addr); 137 if (conn) { 138 conn->authentication_flags |= flags; 139 hci_connection_timestamp(conn); 140 } 141 } 142 143 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 144 hci_connection_t * conn = connection_for_handle(handle); 145 if (!conn) return 0; 146 if (!conn->authentication_flags) return 0; 147 if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0; 148 if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0; 149 return 1; 150 } 151 152 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 153 if (hci_stack.remote_device_db) { 154 hci_stack.remote_device_db->delete_link_key(addr); 155 } 156 } 157 158 159 /** 160 * count connections 161 */ 162 static int nr_hci_connections(){ 163 int count = 0; 164 linked_item_t *it; 165 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 166 return count; 167 } 168 169 /** 170 * Dummy handler called by HCI 171 */ 172 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 173 } 174 175 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 176 hci_connection_t * connection = connection_for_handle(handle); 177 if (!connection) { 178 log_err("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 179 return 0; 180 } 181 return connection->num_acl_packets_sent; 182 } 183 184 uint8_t hci_number_free_acl_slots(){ 185 uint8_t free_slots = hci_stack.total_num_acl_packets; 186 linked_item_t *it; 187 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 188 hci_connection_t * connection = (hci_connection_t *) it; 189 if (free_slots < connection->num_acl_packets_sent) { 190 log_err("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 191 return 0; 192 } 193 free_slots -= connection->num_acl_packets_sent; 194 } 195 return free_slots; 196 } 197 198 uint16_t hci_max_acl_data_packet_length(){ 199 return hci_stack.acl_data_packet_length; 200 } 201 202 int hci_ready_to_send(hci_con_handle_t handle){ 203 return hci_number_free_acl_slots() && hci_number_outgoing_packets(handle) < 2; 204 } 205 206 int hci_send_acl_packet(uint8_t *packet, int size){ 207 208 // check for free places on BT module 209 if (!hci_number_free_acl_slots()) return -1; 210 211 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 212 hci_connection_t *connection = connection_for_handle( con_handle); 213 if (!connection) return 0; 214 hci_connection_timestamp(connection); 215 216 // count packet 217 connection->num_acl_packets_sent++; 218 // log_dbg("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 219 220 // send packet - ignore errors 221 hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 222 223 return 0; 224 } 225 226 static void acl_handler(uint8_t *packet, int size){ 227 228 // get info 229 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 230 hci_connection_t *conn = connection_for_handle(con_handle); 231 uint8_t acl_flags = READ_ACL_FLAGS(packet); 232 uint16_t acl_length = READ_ACL_LENGTH(packet); 233 234 // ignore non-registered handle 235 if (!conn){ 236 log_err( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 237 return; 238 } 239 240 // update idle timestamp 241 hci_connection_timestamp(conn); 242 243 // handle different packet types 244 switch (acl_flags & 0x03) { 245 246 case 0x01: // continuation fragment 247 248 // sanity check 249 if (conn->acl_recombination_pos == 0) { 250 log_err( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 251 return; 252 } 253 254 // append fragment payload (header already stored) 255 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 256 conn->acl_recombination_pos += acl_length; 257 258 // log_err( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", 259 // acl_length, connection->acl_recombination_pos, connection->acl_recombination_length); 260 261 // forward complete L2CAP packet if complete. 262 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 263 264 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 265 // reset recombination buffer 266 conn->acl_recombination_length = 0; 267 conn->acl_recombination_pos = 0; 268 } 269 break; 270 271 case 0x02: { // first fragment 272 273 // sanity check 274 if (conn->acl_recombination_pos) { 275 log_err( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 276 return; 277 } 278 279 // peek into L2CAP packet! 280 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 281 282 // compare fragment size to L2CAP packet size 283 if (acl_length >= l2cap_length + 4){ 284 285 // forward fragment as L2CAP packet 286 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 287 288 } else { 289 // store first fragment and tweak acl length for complete package 290 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 291 conn->acl_recombination_pos = acl_length + 4; 292 conn->acl_recombination_length = l2cap_length; 293 bt_store_16(conn->acl_recombination_buffer, 2, acl_length +4); 294 // log_err( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 295 } 296 break; 297 298 } 299 default: 300 log_err( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 301 return; 302 } 303 304 // execute main loop 305 hci_run(); 306 } 307 308 static hci_shutdown_connection(hci_connection_t *conn){ 309 log_dbg("Connection closed: handle %u, ", conn->con_handle); 310 print_bd_addr( conn->address ); 311 log_dbg("\n"); 312 run_loop_remove_timer(&conn->timeout); 313 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 314 free( conn ); 315 hci_emit_nr_connections_changed(); 316 } 317 318 // avoid huge local variables 319 static device_name_t device_name; 320 static void event_handler(uint8_t *packet, int size){ 321 bd_addr_t addr; 322 hci_con_handle_t handle; 323 hci_connection_t * conn; 324 int i; 325 link_key_t link_key; 326 327 // get num_cmd_packets 328 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 329 // Get Num_HCI_Command_Packets 330 hci_stack.num_cmd_packets = packet[2]; 331 } 332 333 switch (packet[0]) { 334 335 case HCI_EVENT_COMMAND_COMPLETE: 336 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 337 // from offset 5 338 // status 339 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 340 // ignore: SCO data packet len (8) 341 hci_stack.total_num_acl_packets = packet[9]; 342 // ignore: total num SCO packets 343 if (hci_stack.state == HCI_STATE_INITIALIZING){ 344 log_dbg("hci_read_buffer_size: size %u, count %u\n", hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 345 } 346 } 347 break; 348 349 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 350 for (i=0; i<packet[2];i++){ 351 handle = READ_BT_16(packet, 3 + 2*i); 352 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 353 conn = connection_for_handle(handle); 354 if (!conn){ 355 log_err("hci_number_completed_packet lists unused con handle %u\n", handle); 356 continue; 357 } 358 conn->num_acl_packets_sent -= num_packets; 359 // log_dbg("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 360 } 361 break; 362 363 case HCI_EVENT_CONNECTION_REQUEST: 364 bt_flip_addr(addr, &packet[2]); 365 // TODO: eval COD 8-10 366 uint8_t link_type = packet[11]; 367 log_dbg("Connection_incoming: "); print_bd_addr(addr); log_dbg(", type %u\n", link_type); 368 if (link_type == 1) { // ACL 369 conn = connection_for_address(addr); 370 if (!conn) { 371 conn = create_connection_for_addr(addr); 372 } 373 // TODO: check for malloc failure 374 conn->state = ACCEPTED_CONNECTION_REQUEST; 375 hci_send_cmd(&hci_accept_connection_request, addr, 1); 376 } else { 377 // TODO: decline request 378 } 379 break; 380 381 case HCI_EVENT_CONNECTION_COMPLETE: 382 // Connection management 383 bt_flip_addr(addr, &packet[5]); 384 log_dbg("Connection_complete (status=%u)", packet[2]); print_bd_addr(addr); log_dbg("\n"); 385 conn = connection_for_address(addr); 386 if (conn) { 387 if (!packet[2]){ 388 conn->state = OPEN; 389 conn->con_handle = READ_BT_16(packet, 3); 390 391 gettimeofday(&conn->timestamp, NULL); 392 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 393 run_loop_add_timer(&conn->timeout); 394 395 log_dbg("New connection: handle %u, ", conn->con_handle); 396 print_bd_addr( conn->address ); 397 log_dbg("\n"); 398 399 hci_emit_nr_connections_changed(); 400 } else { 401 // connection failed, remove entry 402 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 403 free( conn ); 404 405 // if authentication error, also delete link key 406 if (packet[2] == 0x05) { 407 hci_drop_link_key_for_bd_addr(&addr); 408 } 409 } 410 } 411 break; 412 413 case HCI_EVENT_LINK_KEY_REQUEST: 414 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 415 if (!hci_stack.remote_device_db) break; 416 bt_flip_addr(addr, &packet[2]); 417 if ( hci_stack.remote_device_db->get_link_key( &addr, &link_key)){ 418 hci_send_cmd(&hci_link_key_request_reply, &addr, &link_key); 419 } else { 420 hci_send_cmd(&hci_link_key_request_negative_reply, &addr); 421 } 422 // request already answered 423 return; 424 425 case HCI_EVENT_LINK_KEY_NOTIFICATION: 426 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 427 if (!hci_stack.remote_device_db) break; 428 bt_flip_addr(addr, &packet[2]); 429 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 430 // still forward event to allow dismiss of pairing dialog 431 break; 432 433 case HCI_EVENT_PIN_CODE_REQUEST: 434 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 435 break; 436 437 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 438 if (!hci_stack.remote_device_db) break; 439 if (packet[2]) break; // status not ok 440 bt_flip_addr(addr, &packet[3]); 441 bzero(&device_name, sizeof(device_name_t)); 442 strncpy((char*) device_name, (char*) &packet[9], 248); 443 hci_stack.remote_device_db->put_name(&addr, &device_name); 444 break; 445 446 case HCI_EVENT_INQUIRY_RESULT: 447 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 448 if (!hci_stack.remote_device_db) break; 449 // first send inq result packet 450 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 451 // then send cached remote names 452 for (i=0; i<packet[2];i++){ 453 bt_flip_addr(addr, &packet[3+i*6]); 454 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 455 hci_emit_remote_name_cached(&addr, &device_name); 456 } 457 } 458 return; 459 460 case HCI_EVENT_DISCONNECTION_COMPLETE: 461 if (!packet[2]){ 462 handle = READ_BT_16(packet, 3); 463 hci_connection_t * conn = connection_for_handle(handle); 464 if (conn) { 465 hci_shutdown_connection(conn); 466 } 467 } 468 break; 469 470 default: 471 break; 472 } 473 474 // handle BT initialization 475 if (hci_stack.state == HCI_STATE_INITIALIZING){ 476 // handle H4 synchronization loss on restart 477 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 478 // hci_stack.substate = 0; 479 // } 480 // handle normal init sequence 481 if (hci_stack.substate % 2){ 482 // odd: waiting for event 483 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 484 hci_stack.substate++; 485 } 486 } 487 } 488 489 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 490 491 // execute main loop 492 hci_run(); 493 } 494 495 void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 496 switch (packet_type) { 497 case HCI_EVENT_PACKET: 498 event_handler(packet, size); 499 break; 500 case HCI_ACL_DATA_PACKET: 501 acl_handler(packet, size); 502 break; 503 default: 504 break; 505 } 506 } 507 508 /** Register HCI packet handlers */ 509 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 510 hci_stack.packet_handler = handler; 511 } 512 513 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t * remote_device_db){ 514 515 // reference to use transport layer implementation 516 hci_stack.hci_transport = transport; 517 518 // references to used control implementation 519 hci_stack.control = control; 520 521 // reference to used config 522 hci_stack.config = config; 523 524 // no connections yet 525 hci_stack.connections = NULL; 526 527 // empty cmd buffer 528 hci_stack.hci_cmd_buffer = malloc(3+255); 529 530 // higher level handler 531 hci_stack.packet_handler = dummy_handler; 532 533 // store and open remote device db 534 hci_stack.remote_device_db = remote_device_db; 535 if (hci_stack.remote_device_db) { 536 hci_stack.remote_device_db->open(); 537 } 538 539 // register packet handlers with transport 540 transport->register_packet_handler(&packet_handler); 541 } 542 543 void hci_close(){ 544 // close remote device db 545 if (hci_stack.remote_device_db) { 546 hci_stack.remote_device_db->close(); 547 } 548 } 549 550 // State-Module-Driver overview 551 // state module low-level 552 // HCI_STATE_OFF off close 553 // HCI_STATE_INITIALIZING, on open 554 // HCI_STATE_WORKING, on open 555 // HCI_STATE_HALTING, on open 556 // HCI_STATE_SLEEPING, off/sleep close 557 // HCI_STATE_FALLING_ASLEEP on open 558 559 static int hci_power_control_on(){ 560 561 // power on 562 int err = 0; 563 if (hci_stack.control && hci_stack.control->on){ 564 err = (*hci_stack.control->on)(hci_stack.config); 565 } 566 if (err){ 567 log_err( "POWER_ON failed\n"); 568 hci_emit_hci_open_failed(); 569 return err; 570 } 571 572 // open low-level device 573 err = hci_stack.hci_transport->open(hci_stack.config); 574 if (err){ 575 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 576 if (hci_stack.control && hci_stack.control->off){ 577 (*hci_stack.control->off)(hci_stack.config); 578 } 579 hci_emit_hci_open_failed(); 580 return err; 581 } 582 return 0; 583 } 584 585 static int hci_power_control_wake(){ 586 587 log_dbg("hci_power_control_wake"); 588 589 // wake on 590 int err = 0; 591 if (hci_stack.control && hci_stack.control->wake){ 592 err = (*hci_stack.control->wake)(hci_stack.config); 593 } 594 if (err){ 595 log_err( "WAKE_ON failed\n"); 596 hci_emit_hci_open_failed(); 597 return err; 598 } 599 600 // open low-level device 601 err = hci_stack.hci_transport->open(hci_stack.config); 602 if (err){ 603 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 604 if (hci_stack.control && hci_stack.control->off){ 605 (*hci_stack.control->off)(hci_stack.config); 606 } 607 hci_emit_hci_open_failed(); 608 return err; 609 } 610 return 0; 611 } 612 613 static void hci_power_control_off(){ 614 615 // close low-level device 616 hci_stack.hci_transport->close(hci_stack.config); 617 618 // power off 619 if (hci_stack.control && hci_stack.control->off){ 620 (*hci_stack.control->off)(hci_stack.config); 621 } 622 hci_stack.state = HCI_STATE_OFF; 623 } 624 625 static void hci_power_control_sleep(){ 626 627 log_dbg("hci_power_control_sleep"); 628 629 // close low-level device 630 hci_stack.hci_transport->close(hci_stack.config); 631 632 // sleep mode 633 if (hci_stack.control && hci_stack.control->sleep){ 634 (*hci_stack.control->sleep)(hci_stack.config); 635 } 636 hci_stack.state = HCI_STATE_SLEEPING; 637 } 638 639 int hci_power_control(HCI_POWER_MODE power_mode){ 640 641 log_dbg("hci_power_control: %u\n", power_mode); 642 643 int err = 0; 644 switch (hci_stack.state){ 645 646 case HCI_STATE_OFF: 647 switch (power_mode){ 648 case HCI_POWER_ON: 649 err = hci_power_control_on(); 650 if (err) return err; 651 // set up state machine 652 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 653 hci_stack.state = HCI_STATE_INITIALIZING; 654 hci_stack.substate = 0; 655 break; 656 case HCI_POWER_OFF: 657 // do nothing 658 break; 659 case HCI_POWER_SLEEP: 660 // do nothing (with SLEEP == OFF) 661 break; 662 } 663 break; 664 665 case HCI_STATE_INITIALIZING: 666 switch (power_mode){ 667 case HCI_POWER_ON: 668 // do nothing 669 break; 670 case HCI_POWER_OFF: 671 // no connections yet, just turn it off 672 hci_power_control_off(); 673 break; 674 case HCI_POWER_SLEEP: 675 // no connections yet, just turn it off 676 hci_power_control_sleep(); 677 break; 678 } 679 break; 680 681 case HCI_STATE_WORKING: 682 switch (power_mode){ 683 case HCI_POWER_ON: 684 // do nothing 685 break; 686 case HCI_POWER_OFF: 687 // see hci_run 688 hci_stack.state = HCI_STATE_HALTING; 689 break; 690 case HCI_POWER_SLEEP: 691 // see hci_run 692 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 693 break; 694 } 695 break; 696 697 case HCI_STATE_HALTING: 698 switch (power_mode){ 699 case HCI_POWER_ON: 700 // set up state machine 701 hci_stack.state = HCI_STATE_INITIALIZING; 702 hci_stack.substate = 0; 703 break; 704 case HCI_POWER_OFF: 705 // do nothing 706 break; 707 case HCI_POWER_SLEEP: 708 // see hci_run 709 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 710 break; 711 } 712 break; 713 714 case HCI_STATE_FALLING_ASLEEP: 715 switch (power_mode){ 716 case HCI_POWER_ON: 717 // set up state machine 718 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 719 hci_stack.state = HCI_STATE_INITIALIZING; 720 hci_stack.substate = 0; 721 break; 722 case HCI_POWER_OFF: 723 // see hci_run 724 hci_stack.state = HCI_STATE_HALTING; 725 break; 726 case HCI_POWER_SLEEP: 727 // do nothing 728 break; 729 } 730 break; 731 732 case HCI_STATE_SLEEPING: 733 switch (power_mode){ 734 case HCI_POWER_ON: 735 err = hci_power_control_wake(); 736 if (err) return err; 737 // set up state machine 738 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 739 hci_stack.state = HCI_STATE_INITIALIZING; 740 hci_stack.substate = 0; 741 break; 742 case HCI_POWER_OFF: 743 hci_stack.state = HCI_STATE_OFF; 744 break; 745 case HCI_POWER_SLEEP: 746 // do nothing 747 break; 748 } 749 break; 750 } 751 752 // create internal event 753 hci_emit_state(); 754 755 // trigger next/first action 756 hci_run(); 757 758 return 0; 759 } 760 761 void hci_run(){ 762 763 if (hci_stack.num_cmd_packets == 0) { 764 // cannot send command yet 765 return; 766 } 767 768 hci_connection_t * connection; 769 770 switch (hci_stack.state){ 771 case HCI_STATE_INITIALIZING: 772 if (hci_stack.substate % 2) { 773 // odd: waiting for command completion 774 return; 775 } 776 switch (hci_stack.substate >> 1){ 777 case 0: 778 hci_send_cmd(&hci_reset); 779 break; 780 case 1: 781 // custom initialization 782 if (hci_stack.control && hci_stack.control->next_command){ 783 uint8_t * cmd = (*hci_stack.control->next_command)(hci_stack.config); 784 if (cmd) { 785 int size = 3 + cmd[2]; 786 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, cmd, size); 787 hci_stack.substate = 0; // more init commands 788 break; 789 } 790 } 791 // otherwise continue 792 hci_send_cmd(&hci_read_bd_addr); 793 break; 794 case 2: 795 hci_send_cmd(&hci_read_buffer_size); 796 break; 797 case 3: 798 // ca. 15 sec 799 hci_send_cmd(&hci_write_page_timeout, 0x6000); 800 break; 801 case 4: 802 hci_send_cmd(&hci_write_scan_enable, 3); // 3 inq scan + page scan 803 break; 804 case 5: 805 #ifndef EMBEDDED 806 { 807 char hostname[30]; 808 gethostname(hostname, 30); 809 hostname[29] = '\0'; 810 hci_send_cmd(&hci_write_local_name, hostname); 811 break; 812 } 813 case 6: 814 #endif 815 // done. 816 hci_stack.state = HCI_STATE_WORKING; 817 hci_emit_state(); 818 break; 819 default: 820 break; 821 } 822 hci_stack.substate++; 823 break; 824 825 case HCI_STATE_HALTING: 826 827 log_dbg("HCI_STATE_HALTING\n"); 828 // close all open connections 829 connection = (hci_connection_t *) hci_stack.connections; 830 if (connection){ 831 log_dbg("HCI_STATE_HALTING, connection %u, handle %u\n", (int) connection, connection->con_handle); 832 // send disconnect 833 bt_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 834 835 // send disconnected event right away - causes higher layer connections to get closed, too. 836 hci_shutdown_connection(connection); 837 838 // remove from table 839 hci_stack.connections = connection->item.next; 840 return; 841 } 842 log_dbg("HCI_STATE_HALTING, calling off\n"); 843 844 // switch mode 845 hci_power_control_off(); 846 hci_emit_state(); 847 log_dbg("HCI_STATE_HALTING, done\n"); 848 break; 849 850 case HCI_STATE_FALLING_ASLEEP: 851 // close all open connections 852 connection = (hci_connection_t *) hci_stack.connections; 853 if (connection){ 854 // send disconnect 855 bt_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 856 857 // send disconnected event right away - causes higher layer connections to get closed, too. 858 hci_shutdown_connection(connection); 859 860 // remove from table 861 hci_stack.connections = connection->item.next; 862 return; 863 } 864 865 // switch mode 866 hci_power_control_sleep(); 867 hci_emit_state(); 868 break; 869 870 default: 871 break; 872 } 873 } 874 875 int hci_send_cmd_packet(uint8_t *packet, int size){ 876 bd_addr_t addr; 877 hci_connection_t * conn; 878 // house-keeping 879 880 // create_connection? 881 if (IS_COMMAND(packet, hci_create_connection)){ 882 bt_flip_addr(addr, &packet[3]); 883 log_dbg("Create_connection to "); print_bd_addr(addr); log_dbg("\n"); 884 conn = connection_for_address(addr); 885 if (conn) { 886 // if connection exists 887 if (conn->state == OPEN) { 888 // if OPEN, emit connection complete command 889 hci_emit_connection_complete(conn); 890 } 891 // otherwise, just ignore 892 return 0; // don't sent packet to controller 893 894 } else{ 895 conn = create_connection_for_addr(addr); 896 if (conn){ 897 // create connection struct and register, state = SENT_CREATE_CONNECTION 898 conn->state = SENT_CREATE_CONNECTION; 899 } 900 } 901 } 902 903 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 904 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 905 } 906 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 907 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 908 } 909 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 910 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 911 } 912 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 913 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 914 } 915 916 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 917 if (hci_stack.remote_device_db){ 918 bt_flip_addr(addr, &packet[3]); 919 hci_stack.remote_device_db->delete_link_key(&addr); 920 } 921 } 922 923 hci_stack.num_cmd_packets--; 924 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 925 } 926 927 /** 928 * pre: numcmds >= 0 - it's allowed to send a command to the controller 929 */ 930 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 931 va_list argptr; 932 va_start(argptr, cmd); 933 uint8_t * hci_cmd_buffer = hci_stack.hci_cmd_buffer; 934 uint16_t size = hci_create_cmd_internal(hci_stack.hci_cmd_buffer, cmd, argptr); 935 va_end(argptr); 936 return hci_send_cmd_packet(hci_cmd_buffer, size); 937 } 938 939 // Create various non-HCI events. 940 // TODO: generalize, use table similar to hci_create_command 941 942 void hci_emit_state(){ 943 uint8_t len = 3; 944 uint8_t event[len]; 945 event[0] = BTSTACK_EVENT_STATE; 946 event[1] = len - 3; 947 event[2] = hci_stack.state; 948 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 949 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 950 } 951 952 void hci_emit_connection_complete(hci_connection_t *conn){ 953 uint8_t len = 13; 954 uint8_t event[len]; 955 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 956 event[1] = len - 3; 957 event[2] = 0; // status = OK 958 bt_store_16(event, 3, conn->con_handle); 959 bt_flip_addr(&event[5], conn->address); 960 event[11] = 1; // ACL connection 961 event[12] = 0; // encryption disabled 962 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 963 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 964 } 965 966 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 967 uint8_t len = 4; 968 uint8_t event[len]; 969 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 970 event[1] = len - 2; 971 bt_store_16(event, 2, conn->con_handle); 972 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 973 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 974 } 975 976 void hci_emit_nr_connections_changed(){ 977 uint8_t len = 3; 978 uint8_t event[len]; 979 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 980 event[1] = len - 2; 981 event[2] = nr_hci_connections(); 982 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 983 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 984 } 985 986 void hci_emit_hci_open_failed(){ 987 uint8_t len = 2; 988 uint8_t event[len]; 989 event[0] = BTSTACK_EVENT_POWERON_FAILED; 990 event[1] = len - 2; 991 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 992 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 993 } 994 995 996 void hci_emit_btstack_version() { 997 uint8_t len = 6; 998 uint8_t event[len]; 999 event[0] = BTSTACK_EVENT_VERSION; 1000 event[1] = len - 2; 1001 event[len++] = BTSTACK_MAJOR; 1002 event[len++] = BTSTACK_MINOR; 1003 bt_store_16(event, len, BTSTACK_REVISION); 1004 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1005 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1006 } 1007 1008 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1009 uint8_t len = 3; 1010 uint8_t event[len]; 1011 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1012 event[1] = len - 2; 1013 event[2] = enabled; 1014 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1015 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1016 } 1017 1018 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1019 uint16_t len = 2+1+6+248; 1020 uint8_t event[len]; 1021 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1022 event[1] = len - 2; 1023 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1024 bt_flip_addr(&event[3], *addr); 1025 memcpy(&event[9], name, 248); 1026 hci_dump_packet(HCI_EVENT_PACKET, 0, event, len); 1027 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1028 } 1029