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, ?? ?? 557 // HCI_STATE_FALLING_ASLEEP ?? ?? 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 void hci_power_control_off(){ 586 587 // close low-level device 588 hci_stack.hci_transport->close(hci_stack.config); 589 590 // power off 591 if (hci_stack.control && hci_stack.control->off){ 592 (*hci_stack.control->off)(hci_stack.config); 593 } 594 } 595 596 int hci_power_control(HCI_POWER_MODE power_mode){ 597 int err = 0; 598 switch (hci_stack.state){ 599 600 case HCI_STATE_OFF: 601 switch (power_mode){ 602 case HCI_POWER_ON: 603 err = hci_power_control_on(); 604 if (err) return err; 605 // set up state machine 606 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 607 hci_stack.state = HCI_STATE_INITIALIZING; 608 hci_stack.substate = 0; 609 break; 610 case HCI_POWER_OFF: 611 // do nothing 612 break; 613 case HCI_POWER_SLEEP: 614 // do nothing (with SLEEP == OFF) 615 break; 616 } 617 break; 618 619 case HCI_STATE_INITIALIZING: 620 switch (power_mode){ 621 case HCI_POWER_ON: 622 // do nothing 623 break; 624 case HCI_POWER_OFF: 625 // no connections yet, just turn it off 626 hci_power_control_off(); 627 hci_stack.state = HCI_STATE_OFF; 628 break; 629 case HCI_POWER_SLEEP: 630 // no connections yet, just turn it off 631 hci_power_control_off(); 632 hci_stack.state = HCI_STATE_SLEEPING; 633 break; 634 } 635 break; 636 637 case HCI_STATE_WORKING: 638 switch (power_mode){ 639 case HCI_POWER_ON: 640 // do nothing 641 break; 642 case HCI_POWER_OFF: 643 // see hci_run 644 hci_stack.state = HCI_STATE_HALTING; 645 break; 646 case HCI_POWER_SLEEP: 647 // see hci_run 648 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 649 break; 650 } 651 break; 652 653 case HCI_STATE_HALTING: 654 switch (power_mode){ 655 case HCI_POWER_ON: 656 // set up state machine 657 hci_stack.state = HCI_STATE_INITIALIZING; 658 hci_stack.substate = 0; 659 break; 660 case HCI_POWER_OFF: 661 // do nothing 662 break; 663 case HCI_POWER_SLEEP: 664 // see hci_run 665 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 666 break; 667 } 668 break; 669 670 case HCI_STATE_FALLING_ASLEEP: 671 switch (power_mode){ 672 case HCI_POWER_ON: 673 // set up state machine 674 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 675 hci_stack.state = HCI_STATE_INITIALIZING; 676 hci_stack.substate = 0; 677 break; 678 case HCI_POWER_OFF: 679 // see hci_run 680 hci_stack.state = HCI_STATE_HALTING; 681 break; 682 case HCI_POWER_SLEEP: 683 // do nothing 684 break; 685 } 686 break; 687 688 case HCI_STATE_SLEEPING: 689 switch (power_mode){ 690 case HCI_POWER_ON: 691 // set up state machine 692 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 693 hci_stack.state = HCI_STATE_INITIALIZING; 694 hci_stack.substate = 0; 695 break; 696 case HCI_POWER_OFF: 697 hci_stack.state = HCI_STATE_OFF; 698 break; 699 case HCI_POWER_SLEEP: 700 // do nothing 701 break; 702 } 703 break; 704 } 705 706 // create internal event 707 hci_emit_state(); 708 709 // trigger next/first action 710 hci_run(); 711 712 return 0; 713 } 714 715 void hci_run(){ 716 717 if (hci_stack.num_cmd_packets == 0) { 718 // cannot send command yet 719 return; 720 } 721 722 hci_connection_t * connection; 723 724 switch (hci_stack.state){ 725 case HCI_STATE_INITIALIZING: 726 if (hci_stack.substate % 2) { 727 // odd: waiting for command completion 728 return; 729 } 730 switch (hci_stack.substate >> 1){ 731 case 0: 732 hci_send_cmd(&hci_reset); 733 break; 734 case 1: 735 // custom initialization 736 if (hci_stack.control && hci_stack.control->next_command){ 737 uint8_t * cmd = (*hci_stack.control->next_command)(hci_stack.config); 738 if (cmd) { 739 int size = 3 + cmd[2]; 740 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, cmd, size); 741 hci_stack.substate = 0; // more init commands 742 break; 743 } 744 } 745 // otherwise continue 746 hci_send_cmd(&hci_read_bd_addr); 747 break; 748 case 2: 749 hci_send_cmd(&hci_read_buffer_size); 750 break; 751 case 3: 752 // ca. 15 sec 753 hci_send_cmd(&hci_write_page_timeout, 0x6000); 754 break; 755 case 4: 756 hci_send_cmd(&hci_write_scan_enable, 3); // 3 inq scan + page scan 757 break; 758 case 5: 759 #ifndef EMBEDDED 760 { 761 char hostname[30]; 762 gethostname(hostname, 30); 763 hostname[29] = '\0'; 764 hci_send_cmd(&hci_write_local_name, hostname); 765 break; 766 } 767 case 6: 768 #endif 769 // done. 770 hci_stack.state = HCI_STATE_WORKING; 771 hci_emit_state(); 772 break; 773 default: 774 break; 775 } 776 hci_stack.substate++; 777 break; 778 779 case HCI_STATE_HALTING: 780 781 // close all open connections 782 connection = (hci_connection_t *) hci_stack.connections; 783 if (connection){ 784 // send disconnect 785 bt_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 786 787 // send disconnected event right away - causes higher layer connections to get closed, too. 788 hci_shutdown_connection(connection); 789 790 // remove from table 791 hci_stack.connections = connection->item.next; 792 return; 793 } 794 795 hci_power_control_off(); 796 797 // we're off now 798 hci_stack.state = HCI_STATE_OFF; 799 hci_emit_state(); 800 break; 801 802 default: 803 break; 804 } 805 } 806 807 int hci_send_cmd_packet(uint8_t *packet, int size){ 808 bd_addr_t addr; 809 hci_connection_t * conn; 810 // house-keeping 811 812 // create_connection? 813 if (IS_COMMAND(packet, hci_create_connection)){ 814 bt_flip_addr(addr, &packet[3]); 815 log_dbg("Create_connection to "); print_bd_addr(addr); log_dbg("\n"); 816 conn = connection_for_address(addr); 817 if (conn) { 818 // if connection exists 819 if (conn->state == OPEN) { 820 // if OPEN, emit connection complete command 821 hci_emit_connection_complete(conn); 822 } 823 // otherwise, just ignore 824 return 0; // don't sent packet to controller 825 826 } else{ 827 conn = create_connection_for_addr(addr); 828 if (conn){ 829 // create connection struct and register, state = SENT_CREATE_CONNECTION 830 conn->state = SENT_CREATE_CONNECTION; 831 } 832 } 833 } 834 835 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 836 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 837 } 838 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 839 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 840 } 841 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 842 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 843 } 844 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 845 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 846 } 847 848 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 849 if (hci_stack.remote_device_db){ 850 bt_flip_addr(addr, &packet[3]); 851 hci_stack.remote_device_db->delete_link_key(&addr); 852 } 853 } 854 855 hci_stack.num_cmd_packets--; 856 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 857 } 858 859 /** 860 * pre: numcmds >= 0 - it's allowed to send a command to the controller 861 */ 862 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 863 va_list argptr; 864 va_start(argptr, cmd); 865 uint8_t * hci_cmd_buffer = hci_stack.hci_cmd_buffer; 866 uint16_t size = hci_create_cmd_internal(hci_stack.hci_cmd_buffer, cmd, argptr); 867 va_end(argptr); 868 return hci_send_cmd_packet(hci_cmd_buffer, size); 869 } 870 871 // Create various non-HCI events. 872 // TODO: generalize, use table similar to hci_create_command 873 874 void hci_emit_state(){ 875 uint8_t len = 3; 876 uint8_t event[len]; 877 event[0] = BTSTACK_EVENT_STATE; 878 event[1] = len - 3; 879 event[2] = hci_stack.state; 880 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 881 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 882 } 883 884 void hci_emit_connection_complete(hci_connection_t *conn){ 885 uint8_t len = 13; 886 uint8_t event[len]; 887 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 888 event[1] = len - 3; 889 event[2] = 0; // status = OK 890 bt_store_16(event, 3, conn->con_handle); 891 bt_flip_addr(&event[5], conn->address); 892 event[11] = 1; // ACL connection 893 event[12] = 0; // encryption disabled 894 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 895 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 896 } 897 898 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 899 uint8_t len = 4; 900 uint8_t event[len]; 901 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 902 event[1] = len - 2; 903 bt_store_16(event, 2, conn->con_handle); 904 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 905 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 906 } 907 908 void hci_emit_nr_connections_changed(){ 909 uint8_t len = 3; 910 uint8_t event[len]; 911 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 912 event[1] = len - 2; 913 event[2] = nr_hci_connections(); 914 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 915 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 916 } 917 918 void hci_emit_hci_open_failed(){ 919 uint8_t len = 2; 920 uint8_t event[len]; 921 event[0] = BTSTACK_EVENT_POWERON_FAILED; 922 event[1] = len - 2; 923 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 924 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 925 } 926 927 928 void hci_emit_btstack_version() { 929 uint8_t len = 6; 930 uint8_t event[len]; 931 event[0] = BTSTACK_EVENT_VERSION; 932 event[1] = len - 2; 933 event[len++] = BTSTACK_MAJOR; 934 event[len++] = BTSTACK_MINOR; 935 bt_store_16(event, len, BTSTACK_REVISION); 936 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 937 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 938 } 939 940 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 941 uint8_t len = 3; 942 uint8_t event[len]; 943 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 944 event[1] = len - 2; 945 event[2] = enabled; 946 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 947 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 948 } 949 950 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 951 uint16_t len = 2+1+6+248; 952 uint8_t event[len]; 953 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 954 event[1] = len - 2; 955 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 956 bt_flip_addr(&event[3], *addr); 957 memcpy(&event[9], name, 248); 958 hci_dump_packet(HCI_EVENT_PACKET, 0, event, len); 959 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 960 } 961