1 /* 2 * Copyright (C) 2009 by Matthias Ringwald 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 20 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 21 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 24 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 27 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 */ 31 32 /* 33 * hci.c 34 * 35 * Created by Matthias Ringwald on 4/29/09. 36 * 37 */ 38 39 #include "hci.h" 40 41 #include <stdarg.h> 42 #include <string.h> 43 #include <stdio.h> 44 45 #ifndef EMBEDDED 46 #include <unistd.h> // gethostbyname 47 #endif 48 49 #include "debug.h" 50 #include "hci_dump.h" 51 52 #include <btstack/hci_cmds.h> 53 #include <btstack/version.h> 54 55 // temp 56 #include "l2cap.h" 57 58 #define HCI_CONNECTION_TIMEOUT_MS 10000 59 60 // the STACK is here 61 static hci_stack_t hci_stack; 62 63 /** 64 * get connection for a given handle 65 * 66 * @return connection OR NULL, if not found 67 */ 68 hci_connection_t * connection_for_handle(hci_con_handle_t con_handle){ 69 linked_item_t *it; 70 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 71 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 72 return (hci_connection_t *) it; 73 } 74 } 75 return NULL; 76 } 77 78 #ifdef HAVE_TIME 79 static void hci_connection_timeout_handler(timer_source_t *timer){ 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 } 93 #endif 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 = AUTH_FLAGS_NONE; 112 #ifdef HAVE_TIME 113 linked_item_set_user(&conn->timeout.item, conn); 114 conn->timeout.process = hci_connection_timeout_handler; 115 hci_connection_timestamp(conn); 116 #endif 117 conn->acl_recombination_length = 0; 118 conn->acl_recombination_pos = 0; 119 conn->num_acl_packets_sent = 0; 120 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 121 return conn; 122 } 123 124 /** 125 * get connection for given address 126 * 127 * @return connection OR NULL, if not found 128 */ 129 static hci_connection_t * connection_for_address(bd_addr_t address){ 130 linked_item_t *it; 131 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 132 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 133 return (hci_connection_t *) it; 134 } 135 } 136 return NULL; 137 } 138 139 /** 140 * add authentication flags and reset timer 141 */ 142 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 143 bd_addr_t addr; 144 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 145 hci_connection_t * conn = connection_for_address(addr); 146 if (conn) { 147 conn->authentication_flags |= flags; 148 hci_connection_timestamp(conn); 149 } 150 } 151 152 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 153 hci_connection_t * conn = connection_for_handle(handle); 154 if (!conn) return 0; 155 if (!conn->authentication_flags) return 0; 156 if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0; 157 if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0; 158 return 1; 159 } 160 161 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 162 if (hci_stack.remote_device_db) { 163 hci_stack.remote_device_db->delete_link_key(addr); 164 } 165 } 166 167 168 /** 169 * count connections 170 */ 171 static int nr_hci_connections(void){ 172 int count = 0; 173 linked_item_t *it; 174 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 175 return count; 176 } 177 178 /** 179 * Dummy handler called by HCI 180 */ 181 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 182 } 183 184 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 185 hci_connection_t * connection = connection_for_handle(handle); 186 if (!connection) { 187 log_err("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 188 return 0; 189 } 190 return connection->num_acl_packets_sent; 191 } 192 193 uint8_t hci_number_free_acl_slots(){ 194 uint8_t free_slots = hci_stack.total_num_acl_packets; 195 linked_item_t *it; 196 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 197 hci_connection_t * connection = (hci_connection_t *) it; 198 if (free_slots < connection->num_acl_packets_sent) { 199 log_err("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 200 return 0; 201 } 202 free_slots -= connection->num_acl_packets_sent; 203 } 204 return free_slots; 205 } 206 207 uint16_t hci_max_acl_data_packet_length(){ 208 return hci_stack.acl_data_packet_length; 209 } 210 211 int hci_can_send_packet_now(uint8_t packet_type){ 212 213 // check for async hci transport implementations 214 if (hci_stack.hci_transport->can_send_packet_now){ 215 if (!hci_stack.hci_transport->can_send_packet_now(packet_type)){ 216 return 0; 217 } 218 } 219 220 // check regular Bluetooth flow control 221 switch (packet_type) { 222 case HCI_ACL_DATA_PACKET: 223 return hci_number_free_acl_slots(); 224 case HCI_COMMAND_DATA_PACKET: 225 return hci_stack.num_cmd_packets; 226 default: 227 return 0; 228 } 229 } 230 231 int hci_send_acl_packet(uint8_t *packet, int size){ 232 233 // check for free places on BT module 234 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 235 236 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 237 hci_connection_t *connection = connection_for_handle( con_handle); 238 if (!connection) return 0; 239 hci_connection_timestamp(connection); 240 241 // count packet 242 connection->num_acl_packets_sent++; 243 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 244 245 // send packet - ignore errors 246 hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 247 248 return 0; 249 } 250 251 static void acl_handler(uint8_t *packet, int size){ 252 253 // get info 254 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 255 hci_connection_t *conn = connection_for_handle(con_handle); 256 uint8_t acl_flags = READ_ACL_FLAGS(packet); 257 uint16_t acl_length = READ_ACL_LENGTH(packet); 258 259 // ignore non-registered handle 260 if (!conn){ 261 log_err( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 262 return; 263 } 264 265 // update idle timestamp 266 hci_connection_timestamp(conn); 267 268 // handle different packet types 269 switch (acl_flags & 0x03) { 270 271 case 0x01: // continuation fragment 272 273 // sanity check 274 if (conn->acl_recombination_pos == 0) { 275 log_err( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 276 return; 277 } 278 279 // append fragment payload (header already stored) 280 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 281 conn->acl_recombination_pos += acl_length; 282 283 // log_err( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 284 // conn->acl_recombination_pos, conn->acl_recombination_length); 285 286 // forward complete L2CAP packet if complete. 287 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 288 289 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 290 // reset recombination buffer 291 conn->acl_recombination_length = 0; 292 conn->acl_recombination_pos = 0; 293 } 294 break; 295 296 case 0x02: { // first fragment 297 298 // sanity check 299 if (conn->acl_recombination_pos) { 300 log_err( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 301 return; 302 } 303 304 // peek into L2CAP packet! 305 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 306 307 // log_err( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 308 309 // compare fragment size to L2CAP packet size 310 if (acl_length >= l2cap_length + 4){ 311 312 // forward fragment as L2CAP packet 313 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 314 315 } else { 316 // store first fragment and tweak acl length for complete package 317 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 318 conn->acl_recombination_pos = acl_length + 4; 319 conn->acl_recombination_length = l2cap_length; 320 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 321 } 322 break; 323 324 } 325 default: 326 log_err( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 327 return; 328 } 329 330 // execute main loop 331 hci_run(); 332 } 333 334 static void hci_shutdown_connection(hci_connection_t *conn){ 335 log_info("Connection closed: handle %u, ", conn->con_handle); 336 print_bd_addr( conn->address ); 337 log_info("\n"); 338 339 // cancel all l2cap connections 340 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 341 342 #ifdef HAVE_TIME 343 run_loop_remove_timer(&conn->timeout); 344 #endif 345 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 346 free( conn ); 347 348 // now it's gone 349 hci_emit_nr_connections_changed(); 350 } 351 352 // avoid huge local variables 353 static device_name_t device_name; 354 static void event_handler(uint8_t *packet, int size){ 355 bd_addr_t addr; 356 uint8_t link_type; 357 hci_con_handle_t handle; 358 hci_connection_t * conn; 359 int i; 360 361 switch (packet[0]) { 362 363 case HCI_EVENT_COMMAND_COMPLETE: 364 // get num cmd packets 365 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]); 366 hci_stack.num_cmd_packets = packet[2]; 367 368 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 369 // from offset 5 370 // status 371 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 372 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 373 // ignore: SCO data packet len (8) 374 hci_stack.total_num_acl_packets = packet[9]; 375 // ignore: total num SCO packets 376 if (hci_stack.state == HCI_STATE_INITIALIZING){ 377 log_info("hci_read_buffer_size: size %u, count %u\n", hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 378 } 379 } 380 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 381 hci_emit_discoverable_enabled(hci_stack.discoverable); 382 } 383 break; 384 385 case HCI_EVENT_COMMAND_STATUS: 386 // get num cmd packets 387 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]); 388 hci_stack.num_cmd_packets = packet[3]; 389 break; 390 391 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 392 for (i=0; i<packet[2];i++){ 393 handle = READ_BT_16(packet, 3 + 2*i); 394 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 395 conn = connection_for_handle(handle); 396 if (!conn){ 397 log_err("hci_number_completed_packet lists unused con handle %u\n", handle); 398 continue; 399 } 400 conn->num_acl_packets_sent -= num_packets; 401 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 402 } 403 break; 404 405 case HCI_EVENT_CONNECTION_REQUEST: 406 bt_flip_addr(addr, &packet[2]); 407 // TODO: eval COD 8-10 408 link_type = packet[11]; 409 log_info("Connection_incoming: "); print_bd_addr(addr); log_info(", type %u\n", link_type); 410 if (link_type == 1) { // ACL 411 conn = connection_for_address(addr); 412 if (!conn) { 413 conn = create_connection_for_addr(addr); 414 } 415 // TODO: check for malloc failure 416 conn->state = RECEIVED_CONNECTION_REQUEST; 417 hci_run(); 418 } else { 419 // TODO: decline request 420 } 421 break; 422 423 case HCI_EVENT_CONNECTION_COMPLETE: 424 // Connection management 425 bt_flip_addr(addr, &packet[5]); 426 log_info("Connection_complete (status=%u)", packet[2]); print_bd_addr(addr); log_info("\n"); 427 conn = connection_for_address(addr); 428 if (conn) { 429 if (!packet[2]){ 430 conn->state = OPEN; 431 conn->con_handle = READ_BT_16(packet, 3); 432 433 #ifdef HAVE_TIME 434 gettimeofday(&conn->timestamp, NULL); 435 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 436 run_loop_add_timer(&conn->timeout); 437 #endif 438 log_info("New connection: handle %u, ", conn->con_handle); 439 print_bd_addr( conn->address ); 440 log_info("\n"); 441 442 hci_emit_nr_connections_changed(); 443 } else { 444 // connection failed, remove entry 445 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 446 free( conn ); 447 448 // if authentication error, also delete link key 449 if (packet[2] == 0x05) { 450 hci_drop_link_key_for_bd_addr(&addr); 451 } 452 } 453 } 454 break; 455 456 case HCI_EVENT_LINK_KEY_REQUEST: 457 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 458 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 459 if (!hci_stack.remote_device_db) break; 460 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 461 hci_run(); 462 // request already answered 463 return; 464 465 case HCI_EVENT_LINK_KEY_NOTIFICATION: 466 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 467 if (!hci_stack.remote_device_db) break; 468 bt_flip_addr(addr, &packet[2]); 469 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 470 // still forward event to allow dismiss of pairing dialog 471 break; 472 473 case HCI_EVENT_PIN_CODE_REQUEST: 474 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 475 break; 476 477 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 478 if (!hci_stack.remote_device_db) break; 479 if (packet[2]) break; // status not ok 480 bt_flip_addr(addr, &packet[3]); 481 // fix for invalid remote names - terminate on 0xff 482 for (i=0; i<248;i++){ 483 if (packet[9+i] == 0xff){ 484 packet[9+i] = 0; 485 break; 486 } 487 } 488 bzero(&device_name, sizeof(device_name_t)); 489 strncpy((char*) device_name, (char*) &packet[9], 248); 490 hci_stack.remote_device_db->put_name(&addr, &device_name); 491 break; 492 493 case HCI_EVENT_INQUIRY_RESULT: 494 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 495 if (!hci_stack.remote_device_db) break; 496 // first send inq result packet 497 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 498 // then send cached remote names 499 for (i=0; i<packet[2];i++){ 500 bt_flip_addr(addr, &packet[3+i*6]); 501 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 502 hci_emit_remote_name_cached(&addr, &device_name); 503 } 504 } 505 return; 506 507 case HCI_EVENT_DISCONNECTION_COMPLETE: 508 if (!packet[2]){ 509 handle = READ_BT_16(packet, 3); 510 hci_connection_t * conn = connection_for_handle(handle); 511 if (conn) { 512 hci_shutdown_connection(conn); 513 } 514 } 515 break; 516 517 case HCI_EVENT_HARDWARE_ERROR: 518 if(hci_stack.control->hw_error){ 519 (*hci_stack.control->hw_error)(); 520 } 521 break; 522 523 default: 524 break; 525 } 526 527 // handle BT initialization 528 if (hci_stack.state == HCI_STATE_INITIALIZING){ 529 // handle H4 synchronization loss on restart 530 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 531 // hci_stack.substate = 0; 532 // } 533 // handle normal init sequence 534 if (hci_stack.substate % 2){ 535 // odd: waiting for event 536 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 537 hci_stack.substate++; 538 } 539 } 540 } 541 542 // help with BT sleep 543 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 544 && hci_stack.substate == 1 545 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 546 hci_stack.substate++; 547 } 548 549 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 550 551 // execute main loop 552 hci_run(); 553 } 554 555 void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 556 switch (packet_type) { 557 case HCI_EVENT_PACKET: 558 event_handler(packet, size); 559 break; 560 case HCI_ACL_DATA_PACKET: 561 acl_handler(packet, size); 562 break; 563 default: 564 break; 565 } 566 } 567 568 /** Register HCI packet handlers */ 569 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 570 hci_stack.packet_handler = handler; 571 } 572 573 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t * remote_device_db){ 574 575 // reference to use transport layer implementation 576 hci_stack.hci_transport = transport; 577 578 // references to used control implementation 579 hci_stack.control = control; 580 581 // reference to used config 582 hci_stack.config = config; 583 584 // no connections yet 585 hci_stack.connections = NULL; 586 hci_stack.discoverable = 0; 587 588 // empty cmd buffer 589 hci_stack.hci_cmd_buffer = malloc(3+255); 590 591 // higher level handler 592 hci_stack.packet_handler = dummy_handler; 593 594 // store and open remote device db 595 hci_stack.remote_device_db = remote_device_db; 596 if (hci_stack.remote_device_db) { 597 hci_stack.remote_device_db->open(); 598 } 599 600 // register packet handlers with transport 601 transport->register_packet_handler(&packet_handler); 602 } 603 604 void hci_close(){ 605 // close remote device db 606 if (hci_stack.remote_device_db) { 607 hci_stack.remote_device_db->close(); 608 } 609 } 610 611 // State-Module-Driver overview 612 // state module low-level 613 // HCI_STATE_OFF off close 614 // HCI_STATE_INITIALIZING, on open 615 // HCI_STATE_WORKING, on open 616 // HCI_STATE_HALTING, on open 617 // HCI_STATE_SLEEPING, off/sleep close 618 // HCI_STATE_FALLING_ASLEEP on open 619 620 static int hci_power_control_on(void){ 621 622 // power on 623 int err = 0; 624 if (hci_stack.control && hci_stack.control->on){ 625 err = (*hci_stack.control->on)(hci_stack.config); 626 } 627 if (err){ 628 log_err( "POWER_ON failed\n"); 629 hci_emit_hci_open_failed(); 630 return err; 631 } 632 633 // open low-level device 634 err = hci_stack.hci_transport->open(hci_stack.config); 635 if (err){ 636 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 637 if (hci_stack.control && hci_stack.control->off){ 638 (*hci_stack.control->off)(hci_stack.config); 639 } 640 hci_emit_hci_open_failed(); 641 return err; 642 } 643 return 0; 644 } 645 646 static void hci_power_control_off(void){ 647 648 log_info("hci_power_control_off\n"); 649 650 // close low-level device 651 hci_stack.hci_transport->close(hci_stack.config); 652 653 log_info("hci_power_control_off - hci_transport closed\n"); 654 655 // power off 656 if (hci_stack.control && hci_stack.control->off){ 657 (*hci_stack.control->off)(hci_stack.config); 658 } 659 660 log_info("hci_power_control_off - control closed\n"); 661 662 hci_stack.state = HCI_STATE_OFF; 663 } 664 665 static void hci_power_control_sleep(void){ 666 667 log_info("hci_power_control_sleep\n"); 668 669 #if 0 670 // don't close serial port during sleep 671 672 // close low-level device 673 hci_stack.hci_transport->close(hci_stack.config); 674 #endif 675 676 // sleep mode 677 if (hci_stack.control && hci_stack.control->sleep){ 678 (*hci_stack.control->sleep)(hci_stack.config); 679 } 680 681 hci_stack.state = HCI_STATE_SLEEPING; 682 } 683 684 static int hci_power_control_wake(void){ 685 686 log_info("hci_power_control_wake\n"); 687 688 // wake on 689 if (hci_stack.control && hci_stack.control->wake){ 690 (*hci_stack.control->wake)(hci_stack.config); 691 } 692 693 #if 0 694 // open low-level device 695 int err = hci_stack.hci_transport->open(hci_stack.config); 696 if (err){ 697 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 698 if (hci_stack.control && hci_stack.control->off){ 699 (*hci_stack.control->off)(hci_stack.config); 700 } 701 hci_emit_hci_open_failed(); 702 return err; 703 } 704 #endif 705 706 return 0; 707 } 708 709 710 int hci_power_control(HCI_POWER_MODE power_mode){ 711 712 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 713 714 int err = 0; 715 switch (hci_stack.state){ 716 717 case HCI_STATE_OFF: 718 switch (power_mode){ 719 case HCI_POWER_ON: 720 err = hci_power_control_on(); 721 if (err) return err; 722 // set up state machine 723 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 724 hci_stack.state = HCI_STATE_INITIALIZING; 725 hci_stack.substate = 0; 726 break; 727 case HCI_POWER_OFF: 728 // do nothing 729 break; 730 case HCI_POWER_SLEEP: 731 // do nothing (with SLEEP == OFF) 732 break; 733 } 734 break; 735 736 case HCI_STATE_INITIALIZING: 737 switch (power_mode){ 738 case HCI_POWER_ON: 739 // do nothing 740 break; 741 case HCI_POWER_OFF: 742 // no connections yet, just turn it off 743 hci_power_control_off(); 744 break; 745 case HCI_POWER_SLEEP: 746 // no connections yet, just turn it off 747 hci_power_control_sleep(); 748 break; 749 } 750 break; 751 752 case HCI_STATE_WORKING: 753 switch (power_mode){ 754 case HCI_POWER_ON: 755 // do nothing 756 break; 757 case HCI_POWER_OFF: 758 // see hci_run 759 hci_stack.state = HCI_STATE_HALTING; 760 break; 761 case HCI_POWER_SLEEP: 762 // see hci_run 763 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 764 hci_stack.substate = 0; 765 break; 766 } 767 break; 768 769 case HCI_STATE_HALTING: 770 switch (power_mode){ 771 case HCI_POWER_ON: 772 // set up state machine 773 hci_stack.state = HCI_STATE_INITIALIZING; 774 hci_stack.substate = 0; 775 break; 776 case HCI_POWER_OFF: 777 // do nothing 778 break; 779 case HCI_POWER_SLEEP: 780 // see hci_run 781 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 782 hci_stack.substate = 0; 783 break; 784 } 785 break; 786 787 case HCI_STATE_FALLING_ASLEEP: 788 switch (power_mode){ 789 case HCI_POWER_ON: 790 // set up state machine 791 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 792 hci_stack.state = HCI_STATE_INITIALIZING; 793 hci_stack.substate = 0; 794 break; 795 case HCI_POWER_OFF: 796 // see hci_run 797 hci_stack.state = HCI_STATE_HALTING; 798 break; 799 case HCI_POWER_SLEEP: 800 // do nothing 801 break; 802 } 803 break; 804 805 case HCI_STATE_SLEEPING: 806 switch (power_mode){ 807 case HCI_POWER_ON: 808 err = hci_power_control_wake(); 809 if (err) return err; 810 // set up state machine 811 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 812 hci_stack.state = HCI_STATE_INITIALIZING; 813 hci_stack.substate = 0; 814 break; 815 case HCI_POWER_OFF: 816 hci_stack.state = HCI_STATE_HALTING; 817 break; 818 case HCI_POWER_SLEEP: 819 // do nothing 820 break; 821 } 822 break; 823 } 824 825 // create internal event 826 hci_emit_state(); 827 828 // trigger next/first action 829 hci_run(); 830 831 return 0; 832 } 833 834 void hci_discoverable_control(uint8_t enable){ 835 if (enable) enable = 1; // normalize argument 836 837 if (hci_stack.discoverable == enable){ 838 hci_emit_discoverable_enabled(hci_stack.discoverable); 839 return; 840 } 841 842 hci_send_cmd(&hci_write_scan_enable, 2 | enable); // 1 = inq scan, 2 = page scan 843 hci_stack.discoverable = enable; 844 } 845 846 void hci_run(){ 847 848 hci_connection_t * connection; 849 linked_item_t * it; 850 851 // send pending HCI commands 852 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 853 854 connection = (hci_connection_t *) it; 855 856 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) { 857 // log_info("hci_run: cannot send command packet\n"); 858 return; 859 } 860 861 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 862 log_info("sending hci_accept_connection_request\n"); 863 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 864 connection->state = ACCEPTED_CONNECTION_REQUEST; 865 } 866 867 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 868 869 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 870 link_key_t link_key; 871 log_info("responding to link key request\n"); 872 if ( hci_stack.remote_device_db->get_link_key( &connection->address, &link_key)){ 873 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 874 } else { 875 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 876 } 877 connection->authentication_flags &= ~HANDLE_LINK_KEY_REQUEST; 878 } 879 } 880 881 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 882 883 switch (hci_stack.state){ 884 case HCI_STATE_INITIALIZING: 885 // log_info("hci_init: substate %u\n", hci_stack.substate); 886 if (hci_stack.substate % 2) { 887 // odd: waiting for command completion 888 return; 889 } 890 switch (hci_stack.substate >> 1){ 891 case 0: // RESET 892 hci_send_cmd(&hci_reset); 893 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 894 // skip baud change 895 hci_stack.substate = 4; // >> 1 = 2 896 } 897 break; 898 case 1: // SEND BAUD CHANGE 899 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_cmd_buffer); 900 hci_send_cmd_packet(hci_stack.hci_cmd_buffer, 3 + hci_stack.hci_cmd_buffer[2]); 901 break; 902 case 2: // LOCAL BAUD CHANGE 903 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 904 hci_stack.substate += 2; 905 // break missing here for fall through 906 907 case 3: 908 // custom initialization 909 if (hci_stack.control && hci_stack.control->next_command){ 910 uint8_t * cmd = (*hci_stack.control->next_command)(hci_stack.config); 911 if (cmd) { 912 int size = 3 + cmd[2]; 913 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, cmd, size); 914 hci_stack.substate = 4; // more init commands 915 break; 916 } 917 printf("hci_run: init script done\n\r"); 918 } 919 // otherwise continue 920 hci_send_cmd(&hci_read_bd_addr); 921 break; 922 case 4: 923 hci_send_cmd(&hci_read_buffer_size); 924 break; 925 case 5: 926 // ca. 15 sec 927 hci_send_cmd(&hci_write_page_timeout, 0x6000); 928 break; 929 case 6: 930 hci_send_cmd(&hci_write_scan_enable, 2 | hci_stack.discoverable); // page scan 931 break; 932 case 7: 933 #ifndef EMBEDDED 934 { 935 char hostname[30]; 936 gethostname(hostname, 30); 937 hostname[29] = '\0'; 938 hci_send_cmd(&hci_write_local_name, hostname); 939 break; 940 } 941 case 8: 942 #ifdef USE_BLUETOOL 943 hci_send_cmd(&hci_write_class_of_device, 0x007a020c); // Smartphone 944 break; 945 946 case 9: 947 #endif 948 #endif 949 // done. 950 hci_stack.state = HCI_STATE_WORKING; 951 hci_emit_state(); 952 break; 953 default: 954 break; 955 } 956 hci_stack.substate++; 957 break; 958 959 case HCI_STATE_HALTING: 960 961 log_info("HCI_STATE_HALTING\n"); 962 // close all open connections 963 connection = (hci_connection_t *) hci_stack.connections; 964 if (connection){ 965 966 // send disconnect 967 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 968 969 log_info("HCI_STATE_HALTING, connection %lu, handle %u\n", (uintptr_t) connection, (uint16_t)connection->con_handle); 970 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 971 972 // send disconnected event right away - causes higher layer connections to get closed, too. 973 hci_shutdown_connection(connection); 974 return; 975 } 976 log_info("HCI_STATE_HALTING, calling off\n"); 977 978 // switch mode 979 hci_power_control_off(); 980 981 log_info("HCI_STATE_HALTING, emitting state\n"); 982 hci_emit_state(); 983 log_info("HCI_STATE_HALTING, done\n"); 984 break; 985 986 case HCI_STATE_FALLING_ASLEEP: 987 switch(hci_stack.substate) { 988 case 0: 989 log_info("HCI_STATE_FALLING_ASLEEP\n"); 990 // close all open connections 991 connection = (hci_connection_t *) hci_stack.connections; 992 if (connection){ 993 994 // send disconnect 995 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 996 997 log_info("HCI_STATE_FALLING_ASLEEP, connection %lu, handle %u\n", (uintptr_t) connection, (uint16_t)connection->con_handle); 998 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 999 1000 // send disconnected event right away - causes higher layer connections to get closed, too. 1001 hci_shutdown_connection(connection); 1002 return; 1003 } 1004 1005 // disable page and inquiry scan 1006 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1007 1008 log_info("HCI_STATE_HALTING, disabling inq & page scans\n"); 1009 hci_send_cmd(&hci_write_scan_enable, 0); // none 1010 1011 // continue in next sub state 1012 hci_stack.substate++; 1013 break; 1014 case 1: 1015 // wait for command complete "hci_write_scan_enable" in event_handler(); 1016 break; 1017 case 2: 1018 log_info("HCI_STATE_HALTING, calling sleep\n"); 1019 // switch mode 1020 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1021 hci_emit_state(); 1022 default: 1023 break; 1024 } 1025 break; 1026 1027 default: 1028 break; 1029 } 1030 } 1031 1032 int hci_send_cmd_packet(uint8_t *packet, int size){ 1033 bd_addr_t addr; 1034 hci_connection_t * conn; 1035 // house-keeping 1036 1037 // create_connection? 1038 if (IS_COMMAND(packet, hci_create_connection)){ 1039 bt_flip_addr(addr, &packet[3]); 1040 log_info("Create_connection to "); print_bd_addr(addr); log_info("\n"); 1041 conn = connection_for_address(addr); 1042 if (conn) { 1043 // if connection exists 1044 if (conn->state == OPEN) { 1045 // if OPEN, emit connection complete command 1046 hci_emit_connection_complete(conn); 1047 } 1048 // otherwise, just ignore 1049 return 0; // don't sent packet to controller 1050 1051 } else{ 1052 conn = create_connection_for_addr(addr); 1053 if (conn){ 1054 // create connection struct and register, state = SENT_CREATE_CONNECTION 1055 conn->state = SENT_CREATE_CONNECTION; 1056 } 1057 } 1058 } 1059 1060 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1061 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1062 } 1063 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1064 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1065 } 1066 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1067 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1068 } 1069 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1070 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 1071 } 1072 1073 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1074 if (hci_stack.remote_device_db){ 1075 bt_flip_addr(addr, &packet[3]); 1076 hci_stack.remote_device_db->delete_link_key(&addr); 1077 } 1078 } 1079 1080 hci_stack.num_cmd_packets--; 1081 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1082 } 1083 1084 /** 1085 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1086 */ 1087 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1088 va_list argptr; 1089 va_start(argptr, cmd); 1090 uint8_t * hci_cmd_buffer = hci_stack.hci_cmd_buffer; 1091 uint16_t size = hci_create_cmd_internal(hci_stack.hci_cmd_buffer, cmd, argptr); 1092 va_end(argptr); 1093 return hci_send_cmd_packet(hci_cmd_buffer, size); 1094 } 1095 1096 // Create various non-HCI events. 1097 // TODO: generalize, use table similar to hci_create_command 1098 1099 void hci_emit_state(){ 1100 uint8_t event[3]; 1101 event[0] = BTSTACK_EVENT_STATE; 1102 event[1] = sizeof(event) - 2; 1103 event[2] = hci_stack.state; 1104 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1105 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1106 } 1107 1108 void hci_emit_connection_complete(hci_connection_t *conn){ 1109 uint8_t event[13]; 1110 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1111 event[1] = sizeof(event) - 2; 1112 event[2] = 0; // status = OK 1113 bt_store_16(event, 3, conn->con_handle); 1114 bt_flip_addr(&event[5], conn->address); 1115 event[11] = 1; // ACL connection 1116 event[12] = 0; // encryption disabled 1117 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1118 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1119 } 1120 1121 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1122 uint8_t event[6]; 1123 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1124 event[1] = sizeof(event) - 2; 1125 event[2] = 0; // status = OK 1126 bt_store_16(event, 3, handle); 1127 event[5] = reason; 1128 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1129 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1130 } 1131 1132 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1133 uint8_t event[4]; 1134 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1135 event[1] = sizeof(event) - 2; 1136 bt_store_16(event, 2, conn->con_handle); 1137 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1138 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1139 } 1140 1141 void hci_emit_nr_connections_changed(){ 1142 uint8_t event[3]; 1143 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1144 event[1] = sizeof(event) - 2; 1145 event[2] = nr_hci_connections(); 1146 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1147 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1148 } 1149 1150 void hci_emit_hci_open_failed(){ 1151 uint8_t event[2]; 1152 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1153 event[1] = sizeof(event) - 2; 1154 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1155 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1156 } 1157 1158 1159 void hci_emit_btstack_version() { 1160 uint8_t event[6]; 1161 event[0] = BTSTACK_EVENT_VERSION; 1162 event[1] = sizeof(event) - 2; 1163 event[2] = BTSTACK_MAJOR; 1164 event[3] = BTSTACK_MINOR; 1165 bt_store_16(event, 4, BTSTACK_REVISION); 1166 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1167 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1168 } 1169 1170 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1171 uint8_t event[3]; 1172 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1173 event[1] = sizeof(event) - 2; 1174 event[2] = enabled; 1175 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1176 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1177 } 1178 1179 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1180 uint8_t event[2+1+6+248]; 1181 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1182 event[1] = sizeof(event) - 2; 1183 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1184 bt_flip_addr(&event[3], *addr); 1185 memcpy(&event[9], name, 248); 1186 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1187 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1188 } 1189 1190 void hci_emit_discoverable_enabled(uint8_t enabled){ 1191 uint8_t event[3]; 1192 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1193 event[1] = sizeof(event) - 2; 1194 event[2] = enabled; 1195 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1196 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1197 } 1198