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