1 /* 2 * Copyright (C) 2009 by Matthias Ringwald 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 20 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 21 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 24 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 27 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 */ 31 32 /* 33 * hci.c 34 * 35 * Created by Matthias Ringwald on 4/29/09. 36 * 37 */ 38 39 #include "hci.h" 40 41 #include <stdarg.h> 42 #include <string.h> 43 #include <stdio.h> 44 45 #ifndef EMBEDDED 46 #include <unistd.h> // gethostbyname 47 #endif 48 49 #include "debug.h" 50 #include "hci_dump.h" 51 52 #include "../include/btstack/hci_cmds.h" 53 #include "../include/btstack/version.h" 54 55 // temp 56 #include "l2cap.h" 57 58 #define HCI_CONNECTION_TIMEOUT_MS 10000 59 60 // the STACK is here 61 static hci_stack_t hci_stack; 62 63 /** 64 * get connection for a given handle 65 * 66 * @return connection OR NULL, if not found 67 */ 68 hci_connection_t * connection_for_handle(hci_con_handle_t con_handle){ 69 linked_item_t *it; 70 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 71 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 72 return (hci_connection_t *) it; 73 } 74 } 75 return NULL; 76 } 77 78 static void hci_connection_timeout_handler(timer_source_t *timer){ 79 #ifdef HAVE_TIME 80 hci_connection_t * connection = linked_item_get_user(&timer->item); 81 struct timeval tv; 82 gettimeofday(&tv, NULL); 83 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 84 // connections might be timed out 85 hci_emit_l2cap_check_timeout(connection); 86 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 87 } else { 88 // next timeout check at 89 timer->timeout.tv_sec = connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000; 90 } 91 run_loop_add_timer(timer); 92 #endif 93 } 94 95 static void hci_connection_timestamp(hci_connection_t *connection){ 96 #ifdef HAVE_TIME 97 gettimeofday(&connection->timestamp, NULL); 98 #endif 99 } 100 101 /** 102 * create connection for given address 103 * 104 * @return connection OR NULL, if not found 105 */ 106 static hci_connection_t * create_connection_for_addr(bd_addr_t addr){ 107 hci_connection_t * conn = malloc( sizeof(hci_connection_t) ); 108 if (!conn) return NULL; 109 BD_ADDR_COPY(conn->address, addr); 110 conn->con_handle = 0xffff; 111 conn->authentication_flags = 0; 112 #ifdef HAVE_TIME 113 linked_item_set_user(&conn->timeout.item, conn); 114 conn->timeout.process = hci_connection_timeout_handler; 115 hci_connection_timestamp(conn); 116 #endif 117 conn->acl_recombination_length = 0; 118 conn->acl_recombination_pos = 0; 119 conn->num_acl_packets_sent = 0; 120 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 121 return conn; 122 } 123 124 /** 125 * get connection for given address 126 * 127 * @return connection OR NULL, if not found 128 */ 129 static hci_connection_t * connection_for_address(bd_addr_t address){ 130 linked_item_t *it; 131 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 132 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 133 return (hci_connection_t *) it; 134 } 135 } 136 return NULL; 137 } 138 139 /** 140 * add authentication flags and reset timer 141 */ 142 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 143 bd_addr_t addr; 144 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 145 hci_connection_t * conn = connection_for_address(addr); 146 if (conn) { 147 conn->authentication_flags |= flags; 148 hci_connection_timestamp(conn); 149 } 150 } 151 152 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 153 hci_connection_t * conn = connection_for_handle(handle); 154 if (!conn) return 0; 155 if (!conn->authentication_flags) return 0; 156 if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0; 157 if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0; 158 return 1; 159 } 160 161 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 162 if (hci_stack.remote_device_db) { 163 hci_stack.remote_device_db->delete_link_key(addr); 164 } 165 } 166 167 168 /** 169 * count connections 170 */ 171 static int nr_hci_connections(void){ 172 int count = 0; 173 linked_item_t *it; 174 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 175 return count; 176 } 177 178 /** 179 * Dummy handler called by HCI 180 */ 181 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 182 } 183 184 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 185 hci_connection_t * connection = connection_for_handle(handle); 186 if (!connection) { 187 log_err("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 188 return 0; 189 } 190 return connection->num_acl_packets_sent; 191 } 192 193 uint8_t hci_number_free_acl_slots(){ 194 uint8_t free_slots = hci_stack.total_num_acl_packets; 195 linked_item_t *it; 196 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 197 hci_connection_t * connection = (hci_connection_t *) it; 198 if (free_slots < connection->num_acl_packets_sent) { 199 log_err("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 200 return 0; 201 } 202 free_slots -= connection->num_acl_packets_sent; 203 } 204 return free_slots; 205 } 206 207 uint16_t hci_max_acl_data_packet_length(){ 208 return hci_stack.acl_data_packet_length; 209 } 210 211 int hci_ready_to_send(hci_con_handle_t handle){ 212 return hci_number_free_acl_slots() && hci_number_outgoing_packets(handle) < 2; 213 } 214 215 int hci_send_acl_packet(uint8_t *packet, int size){ 216 217 // check for free places on BT module 218 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 219 220 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 221 hci_connection_t *connection = connection_for_handle( con_handle); 222 if (!connection) return 0; 223 hci_connection_timestamp(connection); 224 225 // count packet 226 connection->num_acl_packets_sent++; 227 // log_dbg("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 228 229 // send packet - ignore errors 230 hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 231 232 return 0; 233 } 234 235 static void acl_handler(uint8_t *packet, int size){ 236 237 // get info 238 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 239 hci_connection_t *conn = connection_for_handle(con_handle); 240 uint8_t acl_flags = READ_ACL_FLAGS(packet); 241 uint16_t acl_length = READ_ACL_LENGTH(packet); 242 243 // ignore non-registered handle 244 if (!conn){ 245 log_err( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 246 return; 247 } 248 249 // update idle timestamp 250 hci_connection_timestamp(conn); 251 252 // handle different packet types 253 switch (acl_flags & 0x03) { 254 255 case 0x01: // continuation fragment 256 257 // sanity check 258 if (conn->acl_recombination_pos == 0) { 259 log_err( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 260 return; 261 } 262 263 // append fragment payload (header already stored) 264 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 265 conn->acl_recombination_pos += acl_length; 266 267 // log_err( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", 268 // acl_length, connection->acl_recombination_pos, connection->acl_recombination_length); 269 270 // forward complete L2CAP packet if complete. 271 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 272 273 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 274 // reset recombination buffer 275 conn->acl_recombination_length = 0; 276 conn->acl_recombination_pos = 0; 277 } 278 break; 279 280 case 0x02: { // first fragment 281 282 // sanity check 283 if (conn->acl_recombination_pos) { 284 log_err( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 285 return; 286 } 287 288 // peek into L2CAP packet! 289 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 290 291 // compare fragment size to L2CAP packet size 292 if (acl_length >= l2cap_length + 4){ 293 294 // forward fragment as L2CAP packet 295 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 296 297 } else { 298 // store first fragment and tweak acl length for complete package 299 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 300 conn->acl_recombination_pos = acl_length + 4; 301 conn->acl_recombination_length = l2cap_length; 302 bt_store_16(conn->acl_recombination_buffer, 2, acl_length +4); 303 // log_err( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 304 } 305 break; 306 307 } 308 default: 309 log_err( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 310 return; 311 } 312 313 // execute main loop 314 hci_run(); 315 } 316 317 static void hci_shutdown_connection(hci_connection_t *conn){ 318 log_dbg("Connection closed: handle %u, ", conn->con_handle); 319 print_bd_addr( conn->address ); 320 log_dbg("\n"); 321 322 // cancel all l2cap connections 323 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 324 325 #ifdef HAVE_TIME 326 run_loop_remove_timer(&conn->timeout); 327 #endif 328 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 329 free( conn ); 330 331 // now it's gone 332 hci_emit_nr_connections_changed(); 333 } 334 335 // avoid huge local variables 336 static device_name_t device_name; 337 static void event_handler(uint8_t *packet, int size){ 338 bd_addr_t addr; 339 hci_con_handle_t handle; 340 hci_connection_t * conn; 341 int i; 342 link_key_t link_key; 343 344 switch (packet[0]) { 345 346 case HCI_EVENT_COMMAND_COMPLETE: 347 // get num cmd packets 348 // log_dbg("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]); 349 hci_stack.num_cmd_packets = packet[2]; 350 351 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 352 // from offset 5 353 // status 354 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 355 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 356 // ignore: SCO data packet len (8) 357 hci_stack.total_num_acl_packets = packet[9]; 358 // ignore: total num SCO packets 359 if (hci_stack.state == HCI_STATE_INITIALIZING){ 360 log_dbg("hci_read_buffer_size: size %u, count %u\n", hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 361 } 362 } 363 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 364 hci_emit_discoverable_enabled(hci_stack.discoverable); 365 } 366 break; 367 368 case HCI_EVENT_COMMAND_STATUS: 369 // get num cmd packets 370 // log_dbg("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]); 371 hci_stack.num_cmd_packets = packet[3]; 372 break; 373 374 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 375 for (i=0; i<packet[2];i++){ 376 handle = READ_BT_16(packet, 3 + 2*i); 377 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 378 conn = connection_for_handle(handle); 379 if (!conn){ 380 log_err("hci_number_completed_packet lists unused con handle %u\n", handle); 381 continue; 382 } 383 conn->num_acl_packets_sent -= num_packets; 384 // log_dbg("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 385 } 386 break; 387 388 case HCI_EVENT_CONNECTION_REQUEST: 389 bt_flip_addr(addr, &packet[2]); 390 // TODO: eval COD 8-10 391 uint8_t link_type = packet[11]; 392 log_dbg("Connection_incoming: "); print_bd_addr(addr); log_dbg(", type %u\n", link_type); 393 if (link_type == 1) { // ACL 394 conn = connection_for_address(addr); 395 if (!conn) { 396 conn = create_connection_for_addr(addr); 397 } 398 // TODO: check for malloc failure 399 conn->state = ACCEPTED_CONNECTION_REQUEST; 400 hci_send_cmd(&hci_accept_connection_request, addr, 1); 401 } else { 402 // TODO: decline request 403 } 404 break; 405 406 case HCI_EVENT_CONNECTION_COMPLETE: 407 // Connection management 408 bt_flip_addr(addr, &packet[5]); 409 log_dbg("Connection_complete (status=%u)", packet[2]); print_bd_addr(addr); log_dbg("\n"); 410 conn = connection_for_address(addr); 411 if (conn) { 412 if (!packet[2]){ 413 conn->state = OPEN; 414 conn->con_handle = READ_BT_16(packet, 3); 415 416 #ifdef HAVE_TIME 417 gettimeofday(&conn->timestamp, NULL); 418 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 419 run_loop_add_timer(&conn->timeout); 420 #endif 421 log_dbg("New connection: handle %u, ", conn->con_handle); 422 print_bd_addr( conn->address ); 423 log_dbg("\n"); 424 425 hci_emit_nr_connections_changed(); 426 } else { 427 // connection failed, remove entry 428 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 429 free( conn ); 430 431 // if authentication error, also delete link key 432 if (packet[2] == 0x05) { 433 hci_drop_link_key_for_bd_addr(&addr); 434 } 435 } 436 } 437 break; 438 439 case HCI_EVENT_LINK_KEY_REQUEST: 440 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 441 if (!hci_stack.remote_device_db) break; 442 bt_flip_addr(addr, &packet[2]); 443 if ( hci_stack.remote_device_db->get_link_key( &addr, &link_key)){ 444 hci_send_cmd(&hci_link_key_request_reply, &addr, &link_key); 445 } else { 446 hci_send_cmd(&hci_link_key_request_negative_reply, &addr); 447 } 448 // request already answered 449 return; 450 451 case HCI_EVENT_LINK_KEY_NOTIFICATION: 452 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 453 if (!hci_stack.remote_device_db) break; 454 bt_flip_addr(addr, &packet[2]); 455 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 456 // still forward event to allow dismiss of pairing dialog 457 break; 458 459 case HCI_EVENT_PIN_CODE_REQUEST: 460 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 461 break; 462 463 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 464 if (!hci_stack.remote_device_db) break; 465 if (packet[2]) break; // status not ok 466 bt_flip_addr(addr, &packet[3]); 467 // fix for invalid remote names - terminate on 0xff 468 for (i=0; i<248;i++){ 469 if (packet[9+i] == 0xff){ 470 packet[9+i] = 0; 471 break; 472 } 473 } 474 bzero(&device_name, sizeof(device_name_t)); 475 strncpy((char*) device_name, (char*) &packet[9], 248); 476 hci_stack.remote_device_db->put_name(&addr, &device_name); 477 break; 478 479 case HCI_EVENT_INQUIRY_RESULT: 480 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 481 if (!hci_stack.remote_device_db) break; 482 // first send inq result packet 483 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 484 // then send cached remote names 485 for (i=0; i<packet[2];i++){ 486 bt_flip_addr(addr, &packet[3+i*6]); 487 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 488 hci_emit_remote_name_cached(&addr, &device_name); 489 } 490 } 491 return; 492 493 case HCI_EVENT_DISCONNECTION_COMPLETE: 494 if (!packet[2]){ 495 handle = READ_BT_16(packet, 3); 496 hci_connection_t * conn = connection_for_handle(handle); 497 if (conn) { 498 hci_shutdown_connection(conn); 499 } 500 } 501 break; 502 503 case HCI_EVENT_HARDWARE_ERROR: 504 if(hci_stack.control->hw_error){ 505 (*hci_stack.control->hw_error)(); 506 } 507 break; 508 509 default: 510 break; 511 } 512 513 // handle BT initialization 514 if (hci_stack.state == HCI_STATE_INITIALIZING){ 515 // handle H4 synchronization loss on restart 516 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 517 // hci_stack.substate = 0; 518 // } 519 // handle normal init sequence 520 if (hci_stack.substate % 2){ 521 // odd: waiting for event 522 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 523 hci_stack.substate++; 524 } 525 } 526 } 527 528 // help with BT sleep 529 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 530 && hci_stack.substate == 1 531 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 532 hci_stack.substate++; 533 } 534 535 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 536 537 // execute main loop 538 hci_run(); 539 } 540 541 void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 542 switch (packet_type) { 543 case HCI_EVENT_PACKET: 544 event_handler(packet, size); 545 break; 546 case HCI_ACL_DATA_PACKET: 547 acl_handler(packet, size); 548 break; 549 default: 550 break; 551 } 552 } 553 554 /** Register HCI packet handlers */ 555 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 556 hci_stack.packet_handler = handler; 557 } 558 559 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t * remote_device_db){ 560 561 // reference to use transport layer implementation 562 hci_stack.hci_transport = transport; 563 564 // references to used control implementation 565 hci_stack.control = control; 566 567 // reference to used config 568 hci_stack.config = config; 569 570 // no connections yet 571 hci_stack.connections = NULL; 572 hci_stack.discoverable = 0; 573 574 // empty cmd buffer 575 hci_stack.hci_cmd_buffer = malloc(3+255); 576 577 // higher level handler 578 hci_stack.packet_handler = dummy_handler; 579 580 // store and open remote device db 581 hci_stack.remote_device_db = remote_device_db; 582 if (hci_stack.remote_device_db) { 583 hci_stack.remote_device_db->open(); 584 } 585 586 // register packet handlers with transport 587 transport->register_packet_handler(&packet_handler); 588 } 589 590 void hci_close(){ 591 // close remote device db 592 if (hci_stack.remote_device_db) { 593 hci_stack.remote_device_db->close(); 594 } 595 } 596 597 // State-Module-Driver overview 598 // state module low-level 599 // HCI_STATE_OFF off close 600 // HCI_STATE_INITIALIZING, on open 601 // HCI_STATE_WORKING, on open 602 // HCI_STATE_HALTING, on open 603 // HCI_STATE_SLEEPING, off/sleep close 604 // HCI_STATE_FALLING_ASLEEP on open 605 606 static int hci_power_control_on(void){ 607 608 // power on 609 int err = 0; 610 if (hci_stack.control && hci_stack.control->on){ 611 err = (*hci_stack.control->on)(hci_stack.config); 612 } 613 if (err){ 614 log_err( "POWER_ON failed\n"); 615 hci_emit_hci_open_failed(); 616 return err; 617 } 618 619 // open low-level device 620 err = hci_stack.hci_transport->open(hci_stack.config); 621 if (err){ 622 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 623 if (hci_stack.control && hci_stack.control->off){ 624 (*hci_stack.control->off)(hci_stack.config); 625 } 626 hci_emit_hci_open_failed(); 627 return err; 628 } 629 return 0; 630 } 631 632 static void hci_power_control_off(void){ 633 634 log_dbg("hci_power_control_off\n"); 635 636 // close low-level device 637 hci_stack.hci_transport->close(hci_stack.config); 638 639 log_dbg("hci_power_control_off - hci_transport closed\n"); 640 641 // power off 642 if (hci_stack.control && hci_stack.control->off){ 643 (*hci_stack.control->off)(hci_stack.config); 644 } 645 646 log_dbg("hci_power_control_off - control closed\n"); 647 648 hci_stack.state = HCI_STATE_OFF; 649 } 650 651 static void hci_power_control_sleep(void){ 652 653 log_dbg("hci_power_control_sleep\n"); 654 655 #if 0 656 // don't close serial port during sleep 657 658 // close low-level device 659 hci_stack.hci_transport->close(hci_stack.config); 660 #endif 661 662 // sleep mode 663 if (hci_stack.control && hci_stack.control->sleep){ 664 (*hci_stack.control->sleep)(hci_stack.config); 665 } 666 667 hci_stack.state = HCI_STATE_SLEEPING; 668 } 669 670 static int hci_power_control_wake(void){ 671 672 log_dbg("hci_power_control_wake\n"); 673 674 // wake on 675 if (hci_stack.control && hci_stack.control->wake){ 676 (*hci_stack.control->wake)(hci_stack.config); 677 } 678 679 #if 0 680 // open low-level device 681 int err = hci_stack.hci_transport->open(hci_stack.config); 682 if (err){ 683 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 684 if (hci_stack.control && hci_stack.control->off){ 685 (*hci_stack.control->off)(hci_stack.config); 686 } 687 hci_emit_hci_open_failed(); 688 return err; 689 } 690 #endif 691 692 return 0; 693 } 694 695 696 int hci_power_control(HCI_POWER_MODE power_mode){ 697 698 log_dbg("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 699 700 int err = 0; 701 switch (hci_stack.state){ 702 703 case HCI_STATE_OFF: 704 switch (power_mode){ 705 case HCI_POWER_ON: 706 err = hci_power_control_on(); 707 if (err) return err; 708 // set up state machine 709 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 710 hci_stack.state = HCI_STATE_INITIALIZING; 711 hci_stack.substate = 0; 712 break; 713 case HCI_POWER_OFF: 714 // do nothing 715 break; 716 case HCI_POWER_SLEEP: 717 // do nothing (with SLEEP == OFF) 718 break; 719 } 720 break; 721 722 case HCI_STATE_INITIALIZING: 723 switch (power_mode){ 724 case HCI_POWER_ON: 725 // do nothing 726 break; 727 case HCI_POWER_OFF: 728 // no connections yet, just turn it off 729 hci_power_control_off(); 730 break; 731 case HCI_POWER_SLEEP: 732 // no connections yet, just turn it off 733 hci_power_control_sleep(); 734 break; 735 } 736 break; 737 738 case HCI_STATE_WORKING: 739 switch (power_mode){ 740 case HCI_POWER_ON: 741 // do nothing 742 break; 743 case HCI_POWER_OFF: 744 // see hci_run 745 hci_stack.state = HCI_STATE_HALTING; 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_HALTING: 756 switch (power_mode){ 757 case HCI_POWER_ON: 758 // set up state machine 759 hci_stack.state = HCI_STATE_INITIALIZING; 760 hci_stack.substate = 0; 761 break; 762 case HCI_POWER_OFF: 763 // do nothing 764 break; 765 case HCI_POWER_SLEEP: 766 // see hci_run 767 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 768 hci_stack.substate = 0; 769 break; 770 } 771 break; 772 773 case HCI_STATE_FALLING_ASLEEP: 774 switch (power_mode){ 775 case HCI_POWER_ON: 776 // set up state machine 777 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 778 hci_stack.state = HCI_STATE_INITIALIZING; 779 hci_stack.substate = 0; 780 break; 781 case HCI_POWER_OFF: 782 // see hci_run 783 hci_stack.state = HCI_STATE_HALTING; 784 break; 785 case HCI_POWER_SLEEP: 786 // do nothing 787 break; 788 } 789 break; 790 791 case HCI_STATE_SLEEPING: 792 switch (power_mode){ 793 case HCI_POWER_ON: 794 err = hci_power_control_wake(); 795 if (err) return err; 796 // set up state machine 797 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 798 hci_stack.state = HCI_STATE_INITIALIZING; 799 hci_stack.substate = 0; 800 break; 801 case HCI_POWER_OFF: 802 hci_stack.state = HCI_STATE_HALTING; 803 break; 804 case HCI_POWER_SLEEP: 805 // do nothing 806 break; 807 } 808 break; 809 } 810 811 // create internal event 812 hci_emit_state(); 813 814 // trigger next/first action 815 hci_run(); 816 817 return 0; 818 } 819 820 void hci_discoverable_control(uint8_t enable){ 821 if (enable) enable = 1; // normalize argument 822 823 if (hci_stack.discoverable == enable){ 824 hci_emit_discoverable_enabled(hci_stack.discoverable); 825 return; 826 } 827 828 hci_send_cmd(&hci_write_scan_enable, 2 | enable); // 1 = inq scan, 2 = page scan 829 hci_stack.discoverable = enable; 830 } 831 832 void hci_run(){ 833 834 if (hci_stack.num_cmd_packets == 0) { 835 // cannot send command yet 836 return; 837 } 838 839 hci_connection_t * connection; 840 841 switch (hci_stack.state){ 842 case HCI_STATE_INITIALIZING: 843 if (hci_stack.substate % 2) { 844 // odd: waiting for command completion 845 return; 846 } 847 switch (hci_stack.substate >> 1){ 848 case 0: // RESET 849 hci_send_cmd(&hci_reset); 850 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 851 // skip baud change 852 hci_stack.substate = 4; // >> 1 = 2 853 } 854 break; 855 case 1: // SEND BAUD CHANGE 856 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_cmd_buffer); 857 hci_send_cmd_packet(hci_stack.hci_cmd_buffer, 3 + hci_stack.hci_cmd_buffer[2]); 858 break; 859 case 2: // LOCAL BAUD CHANGE 860 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 861 hci_stack.substate += 2; 862 // break missing here for fall through 863 864 case 3: 865 // custom initialization 866 if (hci_stack.control && hci_stack.control->next_command){ 867 uint8_t * cmd = (*hci_stack.control->next_command)(hci_stack.config); 868 if (cmd) { 869 int size = 3 + cmd[2]; 870 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, cmd, size); 871 hci_stack.substate = 4; // more init commands 872 break; 873 } 874 printf("hci_run: init script done\n\r"); 875 } 876 // otherwise continue 877 hci_send_cmd(&hci_read_bd_addr); 878 break; 879 case 4: 880 hci_send_cmd(&hci_read_buffer_size); 881 break; 882 case 5: 883 // ca. 15 sec 884 hci_send_cmd(&hci_write_page_timeout, 0x6000); 885 break; 886 case 6: 887 hci_send_cmd(&hci_write_scan_enable, 2 | hci_stack.discoverable); // page scan 888 break; 889 case 7: 890 #ifndef EMBEDDED 891 { 892 char hostname[30]; 893 gethostname(hostname, 30); 894 hostname[29] = '\0'; 895 hci_send_cmd(&hci_write_local_name, hostname); 896 break; 897 } 898 case 8: 899 #ifdef USE_BLUETOOL 900 hci_send_cmd(&hci_write_class_of_device, 0x007a020c); // Smartphone 901 break; 902 903 case 9: 904 #endif 905 #endif 906 // done. 907 hci_stack.state = HCI_STATE_WORKING; 908 hci_emit_state(); 909 break; 910 default: 911 break; 912 } 913 hci_stack.substate++; 914 break; 915 916 case HCI_STATE_HALTING: 917 918 log_dbg("HCI_STATE_HALTING\n"); 919 // close all open connections 920 connection = (hci_connection_t *) hci_stack.connections; 921 if (connection){ 922 log_dbg("HCI_STATE_HALTING, connection %lu, handle %u\n", (uintptr_t) connection, connection->con_handle); 923 // send disconnect 924 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 925 926 // send disconnected event right away - causes higher layer connections to get closed, too. 927 hci_shutdown_connection(connection); 928 return; 929 } 930 log_dbg("HCI_STATE_HALTING, calling off\n"); 931 932 // switch mode 933 hci_power_control_off(); 934 935 log_dbg("HCI_STATE_HALTING, emitting state\n"); 936 hci_emit_state(); 937 log_dbg("HCI_STATE_HALTING, done\n"); 938 break; 939 940 case HCI_STATE_FALLING_ASLEEP: 941 switch(hci_stack.substate) { 942 case 0: 943 log_dbg("HCI_STATE_FALLING_ASLEEP\n"); 944 // close all open connections 945 connection = (hci_connection_t *) hci_stack.connections; 946 if (connection){ 947 log_dbg("HCI_STATE_FALLING_ASLEEP, connection %lu, handle %u\n", (uintptr_t) connection, connection->con_handle); 948 // send disconnect 949 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 950 951 // send disconnected event right away - causes higher layer connections to get closed, too. 952 hci_shutdown_connection(connection); 953 return; 954 } 955 956 log_dbg("HCI_STATE_HALTING, disabling inq & page scans\n"); 957 958 // disable page and inquiry scan 959 hci_send_cmd(&hci_write_scan_enable, 0); // none 960 961 // continue in next sub state 962 hci_stack.substate++; 963 break; 964 case 1: 965 // wait for command complete "hci_write_scan_enable" in event_handler(); 966 break; 967 case 2: 968 log_dbg("HCI_STATE_HALTING, calling sleep\n"); 969 // switch mode 970 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 971 hci_emit_state(); 972 default: 973 break; 974 } 975 break; 976 977 default: 978 break; 979 } 980 } 981 982 int hci_send_cmd_packet(uint8_t *packet, int size){ 983 bd_addr_t addr; 984 hci_connection_t * conn; 985 // house-keeping 986 987 // create_connection? 988 if (IS_COMMAND(packet, hci_create_connection)){ 989 bt_flip_addr(addr, &packet[3]); 990 log_dbg("Create_connection to "); print_bd_addr(addr); log_dbg("\n"); 991 conn = connection_for_address(addr); 992 if (conn) { 993 // if connection exists 994 if (conn->state == OPEN) { 995 // if OPEN, emit connection complete command 996 hci_emit_connection_complete(conn); 997 } 998 // otherwise, just ignore 999 return 0; // don't sent packet to controller 1000 1001 } else{ 1002 conn = create_connection_for_addr(addr); 1003 if (conn){ 1004 // create connection struct and register, state = SENT_CREATE_CONNECTION 1005 conn->state = SENT_CREATE_CONNECTION; 1006 } 1007 } 1008 } 1009 1010 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1011 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1012 } 1013 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1014 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1015 } 1016 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1017 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1018 } 1019 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1020 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 1021 } 1022 1023 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1024 if (hci_stack.remote_device_db){ 1025 bt_flip_addr(addr, &packet[3]); 1026 hci_stack.remote_device_db->delete_link_key(&addr); 1027 } 1028 } 1029 1030 hci_stack.num_cmd_packets--; 1031 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1032 } 1033 1034 /** 1035 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1036 */ 1037 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1038 va_list argptr; 1039 va_start(argptr, cmd); 1040 uint8_t * hci_cmd_buffer = hci_stack.hci_cmd_buffer; 1041 uint16_t size = hci_create_cmd_internal(hci_stack.hci_cmd_buffer, cmd, argptr); 1042 va_end(argptr); 1043 return hci_send_cmd_packet(hci_cmd_buffer, size); 1044 } 1045 1046 // Create various non-HCI events. 1047 // TODO: generalize, use table similar to hci_create_command 1048 1049 void hci_emit_state(){ 1050 uint8_t len = 3; 1051 uint8_t event[len]; 1052 event[0] = BTSTACK_EVENT_STATE; 1053 event[1] = len - 3; 1054 event[2] = hci_stack.state; 1055 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1056 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1057 } 1058 1059 void hci_emit_connection_complete(hci_connection_t *conn){ 1060 uint8_t len = 13; 1061 uint8_t event[len]; 1062 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1063 event[1] = len - 3; 1064 event[2] = 0; // status = OK 1065 bt_store_16(event, 3, conn->con_handle); 1066 bt_flip_addr(&event[5], conn->address); 1067 event[11] = 1; // ACL connection 1068 event[12] = 0; // encryption disabled 1069 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1070 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1071 } 1072 1073 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1074 uint8_t len = 6; 1075 uint8_t event[len]; 1076 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1077 event[1] = len - 3; 1078 event[2] = 0; // status = OK 1079 bt_store_16(event, 3, handle); 1080 event[5] = reason; 1081 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1082 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1083 } 1084 1085 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1086 uint8_t len = 4; 1087 uint8_t event[len]; 1088 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1089 event[1] = len - 2; 1090 bt_store_16(event, 2, conn->con_handle); 1091 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1092 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1093 } 1094 1095 void hci_emit_nr_connections_changed(){ 1096 uint8_t len = 3; 1097 uint8_t event[len]; 1098 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1099 event[1] = len - 2; 1100 event[2] = nr_hci_connections(); 1101 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1102 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1103 } 1104 1105 void hci_emit_hci_open_failed(){ 1106 uint8_t len = 2; 1107 uint8_t event[len]; 1108 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1109 event[1] = len - 2; 1110 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1111 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1112 } 1113 1114 1115 void hci_emit_btstack_version() { 1116 uint8_t len = 6; 1117 uint8_t event[len]; 1118 event[0] = BTSTACK_EVENT_VERSION; 1119 event[1] = len - 2; 1120 event[len++] = BTSTACK_MAJOR; 1121 event[len++] = BTSTACK_MINOR; 1122 bt_store_16(event, len, BTSTACK_REVISION); 1123 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1124 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1125 } 1126 1127 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1128 uint8_t len = 3; 1129 uint8_t event[len]; 1130 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1131 event[1] = len - 2; 1132 event[2] = enabled; 1133 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1134 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1135 } 1136 1137 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1138 uint16_t len = 2+1+6+248; 1139 uint8_t event[len]; 1140 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1141 event[1] = len - 2; 1142 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1143 bt_flip_addr(&event[3], *addr); 1144 memcpy(&event[9], name, 248); 1145 hci_dump_packet(HCI_EVENT_PACKET, 0, event, len); 1146 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1147 } 1148 1149 void hci_emit_discoverable_enabled(uint8_t enabled){ 1150 uint8_t len = 3; 1151 uint8_t event[len]; 1152 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1153 event[1] = len - 2; 1154 event[2] = enabled; 1155 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 1156 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 1157 } 1158