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 "btstack_memory.h" 50 #include "debug.h" 51 #include "hci_dump.h" 52 53 #include <btstack/hci_cmds.h> 54 #include <btstack/version.h> 55 56 // tmpe 57 #include "l2cap.h" 58 59 #define HCI_CONNECTION_TIMEOUT_MS 10000 60 61 // the STACK is here 62 static hci_stack_t hci_stack; 63 64 /** 65 * get connection for a given handle 66 * 67 * @return connection OR NULL, if not found 68 */ 69 hci_connection_t * connection_for_handle(hci_con_handle_t con_handle){ 70 linked_item_t *it; 71 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 72 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 73 return (hci_connection_t *) it; 74 } 75 } 76 return NULL; 77 } 78 79 #ifdef HAVE_TIME 80 static void hci_connection_timeout_handler(timer_source_t *timer){ 81 hci_connection_t * connection = linked_item_get_user(&timer->item); 82 struct timeval tv; 83 gettimeofday(&tv, NULL); 84 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 85 // connections might be timed out 86 hci_emit_l2cap_check_timeout(connection); 87 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 88 } else { 89 // next timeout check at 90 timer->timeout.tv_sec = connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000; 91 } 92 run_loop_add_timer(timer); 93 } 94 #endif 95 96 static void hci_connection_timestamp(hci_connection_t *connection){ 97 #ifdef HAVE_TIME 98 gettimeofday(&connection->timestamp, NULL); 99 #endif 100 } 101 102 /** 103 * create connection for given address 104 * 105 * @return connection OR NULL, if no memory left 106 */ 107 static hci_connection_t * create_connection_for_addr(bd_addr_t addr){ 108 hci_connection_t * conn = btstack_memory_hci_connection_get(); 109 if (!conn) return NULL; 110 BD_ADDR_COPY(conn->address, addr); 111 conn->con_handle = 0xffff; 112 conn->authentication_flags = AUTH_FLAGS_NONE; 113 #ifdef HAVE_TIME 114 linked_item_set_user(&conn->timeout.item, conn); 115 conn->timeout.process = hci_connection_timeout_handler; 116 hci_connection_timestamp(conn); 117 #endif 118 conn->acl_recombination_length = 0; 119 conn->acl_recombination_pos = 0; 120 conn->num_acl_packets_sent = 0; 121 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 122 return conn; 123 } 124 125 /** 126 * get connection for given address 127 * 128 * @return connection OR NULL, if not found 129 */ 130 static hci_connection_t * connection_for_address(bd_addr_t address){ 131 linked_item_t *it; 132 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 133 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 134 return (hci_connection_t *) it; 135 } 136 } 137 return NULL; 138 } 139 140 /** 141 * add authentication flags and reset timer 142 */ 143 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 144 bd_addr_t addr; 145 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 146 hci_connection_t * conn = connection_for_address(addr); 147 if (conn) { 148 conn->authentication_flags |= flags; 149 hci_connection_timestamp(conn); 150 } 151 } 152 153 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 154 hci_connection_t * conn = connection_for_handle(handle); 155 if (!conn) return 0; 156 if (!conn->authentication_flags) return 0; 157 if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0; 158 if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0; 159 return 1; 160 } 161 162 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 163 if (hci_stack.remote_device_db) { 164 hci_stack.remote_device_db->delete_link_key(addr); 165 } 166 } 167 168 169 /** 170 * count connections 171 */ 172 static int nr_hci_connections(void){ 173 int count = 0; 174 linked_item_t *it; 175 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 176 return count; 177 } 178 179 /** 180 * Dummy handler called by HCI 181 */ 182 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 183 } 184 185 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 186 hci_connection_t * connection = connection_for_handle(handle); 187 if (!connection) { 188 log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 189 return 0; 190 } 191 return connection->num_acl_packets_sent; 192 } 193 194 uint8_t hci_number_free_acl_slots(){ 195 uint8_t free_slots = hci_stack.total_num_acl_packets; 196 linked_item_t *it; 197 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 198 hci_connection_t * connection = (hci_connection_t *) it; 199 if (free_slots < connection->num_acl_packets_sent) { 200 log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 201 return 0; 202 } 203 free_slots -= connection->num_acl_packets_sent; 204 } 205 return free_slots; 206 } 207 208 uint16_t hci_max_acl_data_packet_length(){ 209 return hci_stack.acl_data_packet_length; 210 } 211 212 int hci_can_send_packet_now(uint8_t packet_type){ 213 214 // check for async hci transport implementations 215 if (hci_stack.hci_transport->can_send_packet_now){ 216 if (!hci_stack.hci_transport->can_send_packet_now(packet_type)){ 217 return 0; 218 } 219 } 220 221 // check regular Bluetooth flow control 222 switch (packet_type) { 223 case HCI_ACL_DATA_PACKET: 224 return hci_number_free_acl_slots(); 225 case HCI_COMMAND_DATA_PACKET: 226 return hci_stack.num_cmd_packets; 227 default: 228 return 0; 229 } 230 } 231 232 int hci_send_acl_packet(uint8_t *packet, int size){ 233 234 // check for free places on BT module 235 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 236 237 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 238 hci_connection_t *connection = connection_for_handle( con_handle); 239 if (!connection) return 0; 240 hci_connection_timestamp(connection); 241 242 // count packet 243 connection->num_acl_packets_sent++; 244 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 245 246 // send packet - ignore errors 247 hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 248 249 return 0; 250 } 251 252 static void acl_handler(uint8_t *packet, int size){ 253 254 // get info 255 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 256 hci_connection_t *conn = connection_for_handle(con_handle); 257 uint8_t acl_flags = READ_ACL_FLAGS(packet); 258 uint16_t acl_length = READ_ACL_LENGTH(packet); 259 260 // ignore non-registered handle 261 if (!conn){ 262 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 263 return; 264 } 265 266 // update idle timestamp 267 hci_connection_timestamp(conn); 268 269 // handle different packet types 270 switch (acl_flags & 0x03) { 271 272 case 0x01: // continuation fragment 273 274 // sanity check 275 if (conn->acl_recombination_pos == 0) { 276 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 277 return; 278 } 279 280 // append fragment payload (header already stored) 281 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 282 conn->acl_recombination_pos += acl_length; 283 284 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 285 // conn->acl_recombination_pos, conn->acl_recombination_length); 286 287 // forward complete L2CAP packet if complete. 288 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 289 290 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 291 // reset recombination buffer 292 conn->acl_recombination_length = 0; 293 conn->acl_recombination_pos = 0; 294 } 295 break; 296 297 case 0x02: { // first fragment 298 299 // sanity check 300 if (conn->acl_recombination_pos) { 301 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 302 return; 303 } 304 305 // peek into L2CAP packet! 306 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 307 308 // log_error( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 309 310 // compare fragment size to L2CAP packet size 311 if (acl_length >= l2cap_length + 4){ 312 313 // forward fragment as L2CAP packet 314 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 315 316 } else { 317 // store first fragment and tweak acl length for complete package 318 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 319 conn->acl_recombination_pos = acl_length + 4; 320 conn->acl_recombination_length = l2cap_length; 321 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 322 } 323 break; 324 325 } 326 default: 327 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 328 return; 329 } 330 331 // execute main loop 332 hci_run(); 333 } 334 335 static void hci_shutdown_connection(hci_connection_t *conn){ 336 log_info("Connection closed: handle %u, ", conn->con_handle); 337 print_bd_addr( conn->address ); 338 log_info("\n"); 339 340 // cancel all l2cap connections 341 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 342 343 #ifdef HAVE_TIME 344 run_loop_remove_timer(&conn->timeout); 345 #endif 346 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 347 btstack_memory_hci_connection_free( conn ); 348 349 // now it's gone 350 hci_emit_nr_connections_changed(); 351 } 352 353 // avoid huge local variables 354 static device_name_t device_name; 355 static void event_handler(uint8_t *packet, int size){ 356 bd_addr_t addr; 357 uint8_t link_type; 358 hci_con_handle_t handle; 359 hci_connection_t * conn; 360 int i; 361 362 switch (packet[0]) { 363 364 case HCI_EVENT_COMMAND_COMPLETE: 365 // get num cmd packets 366 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]); 367 hci_stack.num_cmd_packets = packet[2]; 368 369 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 370 // from offset 5 371 // status 372 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 373 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 374 // ignore: SCO data packet len (8) 375 hci_stack.total_num_acl_packets = packet[9]; 376 // ignore: total num SCO packets 377 if (hci_stack.state == HCI_STATE_INITIALIZING){ 378 log_info("hci_read_buffer_size: size %u, count %u\n", hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 379 } 380 } 381 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 382 hci_emit_discoverable_enabled(hci_stack.discoverable); 383 } 384 break; 385 386 case HCI_EVENT_COMMAND_STATUS: 387 // get num cmd packets 388 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]); 389 hci_stack.num_cmd_packets = packet[3]; 390 break; 391 392 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 393 for (i=0; i<packet[2];i++){ 394 handle = READ_BT_16(packet, 3 + 2*i); 395 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 396 conn = connection_for_handle(handle); 397 if (!conn){ 398 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 399 continue; 400 } 401 conn->num_acl_packets_sent -= num_packets; 402 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 403 } 404 break; 405 406 case HCI_EVENT_CONNECTION_REQUEST: 407 bt_flip_addr(addr, &packet[2]); 408 // TODO: eval COD 8-10 409 link_type = packet[11]; 410 log_info("Connection_incoming: "); print_bd_addr(addr); log_info(", type %u\n", link_type); 411 if (link_type == 1) { // ACL 412 conn = connection_for_address(addr); 413 if (!conn) { 414 conn = create_connection_for_addr(addr); 415 } 416 if (!conn) { 417 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 418 hci_stack.decline_reason = 0x0d; 419 BD_ADDR_COPY(hci_stack.decline_addr, addr); 420 break; 421 } 422 conn->state = RECEIVED_CONNECTION_REQUEST; 423 hci_run(); 424 } else { 425 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 426 hci_stack.decline_reason = 0x0a; 427 BD_ADDR_COPY(hci_stack.decline_addr, addr); 428 } 429 break; 430 431 case HCI_EVENT_CONNECTION_COMPLETE: 432 // Connection management 433 bt_flip_addr(addr, &packet[5]); 434 log_info("Connection_complete (status=%u)", packet[2]); print_bd_addr(addr); log_info("\n"); 435 conn = connection_for_address(addr); 436 if (conn) { 437 if (!packet[2]){ 438 conn->state = OPEN; 439 conn->con_handle = READ_BT_16(packet, 3); 440 441 #ifdef HAVE_TIME 442 gettimeofday(&conn->timestamp, NULL); 443 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 444 run_loop_add_timer(&conn->timeout); 445 #endif 446 log_info("New connection: handle %u, ", conn->con_handle); 447 print_bd_addr( conn->address ); 448 log_info("\n"); 449 450 hci_emit_nr_connections_changed(); 451 } else { 452 // connection failed, remove entry 453 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 454 btstack_memory_hci_connection_free( conn ); 455 456 // if authentication error, also delete link key 457 if (packet[2] == 0x05) { 458 hci_drop_link_key_for_bd_addr(&addr); 459 } 460 } 461 } 462 break; 463 464 case HCI_EVENT_LINK_KEY_REQUEST: 465 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 466 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 467 if (!hci_stack.remote_device_db) break; 468 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 469 hci_run(); 470 // request already answered 471 return; 472 473 case HCI_EVENT_LINK_KEY_NOTIFICATION: 474 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 475 if (!hci_stack.remote_device_db) break; 476 bt_flip_addr(addr, &packet[2]); 477 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 478 // still forward event to allow dismiss of pairing dialog 479 break; 480 481 case HCI_EVENT_PIN_CODE_REQUEST: 482 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 483 break; 484 485 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 486 if (!hci_stack.remote_device_db) break; 487 if (packet[2]) break; // status not ok 488 bt_flip_addr(addr, &packet[3]); 489 // fix for invalid remote names - terminate on 0xff 490 for (i=0; i<248;i++){ 491 if (packet[9+i] == 0xff){ 492 packet[9+i] = 0; 493 break; 494 } 495 } 496 bzero(&device_name, sizeof(device_name_t)); 497 strncpy((char*) device_name, (char*) &packet[9], 248); 498 hci_stack.remote_device_db->put_name(&addr, &device_name); 499 break; 500 501 case HCI_EVENT_INQUIRY_RESULT: 502 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 503 if (!hci_stack.remote_device_db) break; 504 // first send inq result packet 505 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 506 // then send cached remote names 507 for (i=0; i<packet[2];i++){ 508 bt_flip_addr(addr, &packet[3+i*6]); 509 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 510 hci_emit_remote_name_cached(&addr, &device_name); 511 } 512 } 513 return; 514 515 case HCI_EVENT_DISCONNECTION_COMPLETE: 516 if (!packet[2]){ 517 handle = READ_BT_16(packet, 3); 518 hci_connection_t * conn = connection_for_handle(handle); 519 if (conn) { 520 hci_shutdown_connection(conn); 521 } 522 } 523 break; 524 525 case HCI_EVENT_HARDWARE_ERROR: 526 if(hci_stack.control->hw_error){ 527 (*hci_stack.control->hw_error)(); 528 } 529 break; 530 531 default: 532 break; 533 } 534 535 // handle BT initialization 536 if (hci_stack.state == HCI_STATE_INITIALIZING){ 537 // handle H4 synchronization loss on restart 538 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 539 // hci_stack.substate = 0; 540 // } 541 // handle normal init sequence 542 if (hci_stack.substate % 2){ 543 // odd: waiting for event 544 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 545 hci_stack.substate++; 546 } 547 } 548 } 549 550 // help with BT sleep 551 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 552 && hci_stack.substate == 1 553 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 554 hci_stack.substate++; 555 } 556 557 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 558 559 // execute main loop 560 hci_run(); 561 } 562 563 void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 564 switch (packet_type) { 565 case HCI_EVENT_PACKET: 566 event_handler(packet, size); 567 break; 568 case HCI_ACL_DATA_PACKET: 569 acl_handler(packet, size); 570 break; 571 default: 572 break; 573 } 574 } 575 576 /** Register HCI packet handlers */ 577 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 578 hci_stack.packet_handler = handler; 579 } 580 581 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t * remote_device_db){ 582 583 // reference to use transport layer implementation 584 hci_stack.hci_transport = transport; 585 586 // references to used control implementation 587 hci_stack.control = control; 588 589 // reference to used config 590 hci_stack.config = config; 591 592 // no connections yet 593 hci_stack.connections = NULL; 594 hci_stack.discoverable = 0; 595 596 // higher level handler 597 hci_stack.packet_handler = dummy_handler; 598 599 // store and open remote device db 600 hci_stack.remote_device_db = remote_device_db; 601 if (hci_stack.remote_device_db) { 602 hci_stack.remote_device_db->open(); 603 } 604 605 // register packet handlers with transport 606 transport->register_packet_handler(&packet_handler); 607 } 608 609 void hci_close(){ 610 // close remote device db 611 if (hci_stack.remote_device_db) { 612 hci_stack.remote_device_db->close(); 613 } 614 } 615 616 // State-Module-Driver overview 617 // state module low-level 618 // HCI_STATE_OFF off close 619 // HCI_STATE_INITIALIZING, on open 620 // HCI_STATE_WORKING, on open 621 // HCI_STATE_HALTING, on open 622 // HCI_STATE_SLEEPING, off/sleep close 623 // HCI_STATE_FALLING_ASLEEP on open 624 625 static int hci_power_control_on(void){ 626 627 // power on 628 int err = 0; 629 if (hci_stack.control && hci_stack.control->on){ 630 err = (*hci_stack.control->on)(hci_stack.config); 631 } 632 if (err){ 633 log_error( "POWER_ON failed\n"); 634 hci_emit_hci_open_failed(); 635 return err; 636 } 637 638 // open low-level device 639 err = hci_stack.hci_transport->open(hci_stack.config); 640 if (err){ 641 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 642 if (hci_stack.control && hci_stack.control->off){ 643 (*hci_stack.control->off)(hci_stack.config); 644 } 645 hci_emit_hci_open_failed(); 646 return err; 647 } 648 return 0; 649 } 650 651 static void hci_power_control_off(void){ 652 653 log_info("hci_power_control_off\n"); 654 655 // close low-level device 656 hci_stack.hci_transport->close(hci_stack.config); 657 658 log_info("hci_power_control_off - hci_transport closed\n"); 659 660 // power off 661 if (hci_stack.control && hci_stack.control->off){ 662 (*hci_stack.control->off)(hci_stack.config); 663 } 664 665 log_info("hci_power_control_off - control closed\n"); 666 667 hci_stack.state = HCI_STATE_OFF; 668 } 669 670 static void hci_power_control_sleep(void){ 671 672 log_info("hci_power_control_sleep\n"); 673 674 #if 0 675 // don't close serial port during sleep 676 677 // close low-level device 678 hci_stack.hci_transport->close(hci_stack.config); 679 #endif 680 681 // sleep mode 682 if (hci_stack.control && hci_stack.control->sleep){ 683 (*hci_stack.control->sleep)(hci_stack.config); 684 } 685 686 hci_stack.state = HCI_STATE_SLEEPING; 687 } 688 689 static int hci_power_control_wake(void){ 690 691 log_info("hci_power_control_wake\n"); 692 693 // wake on 694 if (hci_stack.control && hci_stack.control->wake){ 695 (*hci_stack.control->wake)(hci_stack.config); 696 } 697 698 #if 0 699 // open low-level device 700 int err = hci_stack.hci_transport->open(hci_stack.config); 701 if (err){ 702 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 703 if (hci_stack.control && hci_stack.control->off){ 704 (*hci_stack.control->off)(hci_stack.config); 705 } 706 hci_emit_hci_open_failed(); 707 return err; 708 } 709 #endif 710 711 return 0; 712 } 713 714 715 int hci_power_control(HCI_POWER_MODE power_mode){ 716 717 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 718 719 int err = 0; 720 switch (hci_stack.state){ 721 722 case HCI_STATE_OFF: 723 switch (power_mode){ 724 case HCI_POWER_ON: 725 err = hci_power_control_on(); 726 if (err) return err; 727 // set up state machine 728 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 729 hci_stack.state = HCI_STATE_INITIALIZING; 730 hci_stack.substate = 0; 731 break; 732 case HCI_POWER_OFF: 733 // do nothing 734 break; 735 case HCI_POWER_SLEEP: 736 // do nothing (with SLEEP == OFF) 737 break; 738 } 739 break; 740 741 case HCI_STATE_INITIALIZING: 742 switch (power_mode){ 743 case HCI_POWER_ON: 744 // do nothing 745 break; 746 case HCI_POWER_OFF: 747 // no connections yet, just turn it off 748 hci_power_control_off(); 749 break; 750 case HCI_POWER_SLEEP: 751 // no connections yet, just turn it off 752 hci_power_control_sleep(); 753 break; 754 } 755 break; 756 757 case HCI_STATE_WORKING: 758 switch (power_mode){ 759 case HCI_POWER_ON: 760 // do nothing 761 break; 762 case HCI_POWER_OFF: 763 // see hci_run 764 hci_stack.state = HCI_STATE_HALTING; 765 break; 766 case HCI_POWER_SLEEP: 767 // see hci_run 768 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 769 hci_stack.substate = 0; 770 break; 771 } 772 break; 773 774 case HCI_STATE_HALTING: 775 switch (power_mode){ 776 case HCI_POWER_ON: 777 // set up state machine 778 hci_stack.state = HCI_STATE_INITIALIZING; 779 hci_stack.substate = 0; 780 break; 781 case HCI_POWER_OFF: 782 // do nothing 783 break; 784 case HCI_POWER_SLEEP: 785 // see hci_run 786 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 787 hci_stack.substate = 0; 788 break; 789 } 790 break; 791 792 case HCI_STATE_FALLING_ASLEEP: 793 switch (power_mode){ 794 case HCI_POWER_ON: 795 // set up state machine 796 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 797 hci_stack.state = HCI_STATE_INITIALIZING; 798 hci_stack.substate = 0; 799 break; 800 case HCI_POWER_OFF: 801 // see hci_run 802 hci_stack.state = HCI_STATE_HALTING; 803 break; 804 case HCI_POWER_SLEEP: 805 // do nothing 806 break; 807 } 808 break; 809 810 case HCI_STATE_SLEEPING: 811 switch (power_mode){ 812 case HCI_POWER_ON: 813 err = hci_power_control_wake(); 814 if (err) return err; 815 // set up state machine 816 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 817 hci_stack.state = HCI_STATE_INITIALIZING; 818 hci_stack.substate = 0; 819 break; 820 case HCI_POWER_OFF: 821 hci_stack.state = HCI_STATE_HALTING; 822 break; 823 case HCI_POWER_SLEEP: 824 // do nothing 825 break; 826 } 827 break; 828 } 829 830 // create internal event 831 hci_emit_state(); 832 833 // trigger next/first action 834 hci_run(); 835 836 return 0; 837 } 838 839 void hci_discoverable_control(uint8_t enable){ 840 if (enable) enable = 1; // normalize argument 841 842 if (hci_stack.discoverable == enable){ 843 hci_emit_discoverable_enabled(hci_stack.discoverable); 844 return; 845 } 846 847 hci_send_cmd(&hci_write_scan_enable, 2 | enable); // 1 = inq scan, 2 = page scan 848 hci_stack.discoverable = enable; 849 } 850 851 void hci_run(){ 852 853 hci_connection_t * connection; 854 linked_item_t * it; 855 856 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 857 858 // global/non-connection oriented commands - decline incoming connections 859 if (hci_stack.decline_reason){ 860 uint8_t reason = hci_stack.decline_reason; 861 hci_stack.decline_reason = 0; 862 hci_send_cmd(&hci_reject_connection_request, hci_stack.decline_addr, reason); 863 } 864 865 // send pending HCI commands 866 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 867 868 connection = (hci_connection_t *) it; 869 870 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) { 871 // log_info("hci_run: cannot send command packet\n"); 872 return; 873 } 874 875 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 876 log_info("sending hci_accept_connection_request\n"); 877 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 878 connection->state = ACCEPTED_CONNECTION_REQUEST; 879 } 880 881 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 882 883 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 884 link_key_t link_key; 885 log_info("responding to link key request\n"); 886 if ( hci_stack.remote_device_db->get_link_key( &connection->address, &link_key)){ 887 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 888 } else { 889 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 890 } 891 connection->authentication_flags &= ~HANDLE_LINK_KEY_REQUEST; 892 } 893 } 894 895 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 896 897 switch (hci_stack.state){ 898 case HCI_STATE_INITIALIZING: 899 // log_info("hci_init: substate %u\n", hci_stack.substate); 900 if (hci_stack.substate % 2) { 901 // odd: waiting for command completion 902 return; 903 } 904 switch (hci_stack.substate >> 1){ 905 case 0: // RESET 906 hci_send_cmd(&hci_reset); 907 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 908 // skip baud change 909 hci_stack.substate = 4; // >> 1 = 2 910 } 911 break; 912 case 1: // SEND BAUD CHANGE 913 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_cmd_buffer); 914 hci_send_cmd_packet(hci_stack.hci_cmd_buffer, 3 + hci_stack.hci_cmd_buffer[2]); 915 break; 916 case 2: // LOCAL BAUD CHANGE 917 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 918 hci_stack.substate += 2; 919 // break missing here for fall through 920 921 case 3: 922 // custom initialization 923 if (hci_stack.control && hci_stack.control->next_command){ 924 uint8_t * cmd = (*hci_stack.control->next_command)(hci_stack.config); 925 if (cmd) { 926 int size = 3 + cmd[2]; 927 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, cmd, size); 928 hci_stack.substate = 4; // more init commands 929 break; 930 } 931 printf("hci_run: init script done\n\r"); 932 } 933 // otherwise continue 934 hci_send_cmd(&hci_read_bd_addr); 935 break; 936 case 4: 937 hci_send_cmd(&hci_read_buffer_size); 938 break; 939 case 5: 940 // ca. 15 sec 941 hci_send_cmd(&hci_write_page_timeout, 0x6000); 942 break; 943 case 6: 944 hci_send_cmd(&hci_write_scan_enable, 2 | hci_stack.discoverable); // page scan 945 break; 946 case 7: 947 #ifndef EMBEDDED 948 { 949 char hostname[30]; 950 gethostname(hostname, 30); 951 hostname[29] = '\0'; 952 hci_send_cmd(&hci_write_local_name, hostname); 953 break; 954 } 955 case 8: 956 #ifdef USE_BLUETOOL 957 hci_send_cmd(&hci_write_class_of_device, 0x007a020c); // Smartphone 958 break; 959 960 case 9: 961 #endif 962 #endif 963 // done. 964 hci_stack.state = HCI_STATE_WORKING; 965 hci_emit_state(); 966 break; 967 default: 968 break; 969 } 970 hci_stack.substate++; 971 break; 972 973 case HCI_STATE_HALTING: 974 975 log_info("HCI_STATE_HALTING\n"); 976 // close all open connections 977 connection = (hci_connection_t *) hci_stack.connections; 978 if (connection){ 979 980 // send disconnect 981 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 982 983 log_info("HCI_STATE_HALTING, connection %lu, handle %u\n", (uintptr_t) connection, (uint16_t)connection->con_handle); 984 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 985 986 // send disconnected event right away - causes higher layer connections to get closed, too. 987 hci_shutdown_connection(connection); 988 return; 989 } 990 log_info("HCI_STATE_HALTING, calling off\n"); 991 992 // switch mode 993 hci_power_control_off(); 994 995 log_info("HCI_STATE_HALTING, emitting state\n"); 996 hci_emit_state(); 997 log_info("HCI_STATE_HALTING, done\n"); 998 break; 999 1000 case HCI_STATE_FALLING_ASLEEP: 1001 switch(hci_stack.substate) { 1002 case 0: 1003 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1004 // close all open connections 1005 connection = (hci_connection_t *) hci_stack.connections; 1006 if (connection){ 1007 1008 // send disconnect 1009 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1010 1011 log_info("HCI_STATE_FALLING_ASLEEP, connection %lu, handle %u\n", (uintptr_t) connection, (uint16_t)connection->con_handle); 1012 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1013 1014 // send disconnected event right away - causes higher layer connections to get closed, too. 1015 hci_shutdown_connection(connection); 1016 return; 1017 } 1018 1019 // disable page and inquiry scan 1020 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1021 1022 log_info("HCI_STATE_HALTING, disabling inq & page scans\n"); 1023 hci_send_cmd(&hci_write_scan_enable, 0); // none 1024 1025 // continue in next sub state 1026 hci_stack.substate++; 1027 break; 1028 case 1: 1029 // wait for command complete "hci_write_scan_enable" in event_handler(); 1030 break; 1031 case 2: 1032 log_info("HCI_STATE_HALTING, calling sleep\n"); 1033 // switch mode 1034 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1035 hci_emit_state(); 1036 default: 1037 break; 1038 } 1039 break; 1040 1041 default: 1042 break; 1043 } 1044 } 1045 1046 int hci_send_cmd_packet(uint8_t *packet, int size){ 1047 bd_addr_t addr; 1048 hci_connection_t * conn; 1049 // house-keeping 1050 1051 // create_connection? 1052 if (IS_COMMAND(packet, hci_create_connection)){ 1053 bt_flip_addr(addr, &packet[3]); 1054 log_info("Create_connection to "); print_bd_addr(addr); log_info("\n"); 1055 conn = connection_for_address(addr); 1056 if (conn) { 1057 // if connection exists 1058 if (conn->state == OPEN) { 1059 // and OPEN, emit connection complete command 1060 hci_emit_connection_complete(conn, 0); 1061 } 1062 // otherwise, just ignore as it is already in the open process 1063 return 0; // don't sent packet to controller 1064 1065 } 1066 // create connection struct and register, state = SENT_CREATE_CONNECTION 1067 conn = create_connection_for_addr(addr); 1068 if (!conn){ 1069 // notify client that alloc failed 1070 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1071 return 0; // don't sent packet to controller 1072 } 1073 conn->state = SENT_CREATE_CONNECTION; 1074 } 1075 1076 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1077 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1078 } 1079 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1080 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1081 } 1082 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1083 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1084 } 1085 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1086 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 1087 } 1088 1089 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1090 if (hci_stack.remote_device_db){ 1091 bt_flip_addr(addr, &packet[3]); 1092 hci_stack.remote_device_db->delete_link_key(&addr); 1093 } 1094 } 1095 1096 hci_stack.num_cmd_packets--; 1097 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1098 } 1099 1100 /** 1101 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1102 */ 1103 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1104 va_list argptr; 1105 va_start(argptr, cmd); 1106 uint16_t size = hci_create_cmd_internal(hci_stack.hci_cmd_buffer, cmd, argptr); 1107 va_end(argptr); 1108 return hci_send_cmd_packet(hci_stack.hci_cmd_buffer, size); 1109 } 1110 1111 // Create various non-HCI events. 1112 // TODO: generalize, use table similar to hci_create_command 1113 1114 void hci_emit_state(){ 1115 uint8_t event[3]; 1116 event[0] = BTSTACK_EVENT_STATE; 1117 event[1] = sizeof(event) - 2; 1118 event[2] = hci_stack.state; 1119 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1120 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1121 } 1122 1123 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1124 uint8_t event[13]; 1125 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1126 event[1] = sizeof(event) - 2; 1127 event[2] = status; 1128 bt_store_16(event, 3, conn->con_handle); 1129 bt_flip_addr(&event[5], conn->address); 1130 event[11] = 1; // ACL connection 1131 event[12] = 0; // encryption disabled 1132 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1133 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1134 } 1135 1136 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1137 uint8_t event[6]; 1138 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1139 event[1] = sizeof(event) - 2; 1140 event[2] = 0; // status = OK 1141 bt_store_16(event, 3, handle); 1142 event[5] = reason; 1143 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1144 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1145 } 1146 1147 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1148 uint8_t event[4]; 1149 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1150 event[1] = sizeof(event) - 2; 1151 bt_store_16(event, 2, conn->con_handle); 1152 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1153 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1154 } 1155 1156 void hci_emit_nr_connections_changed(){ 1157 uint8_t event[3]; 1158 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1159 event[1] = sizeof(event) - 2; 1160 event[2] = nr_hci_connections(); 1161 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1162 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1163 } 1164 1165 void hci_emit_hci_open_failed(){ 1166 uint8_t event[2]; 1167 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1168 event[1] = sizeof(event) - 2; 1169 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1170 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1171 } 1172 1173 1174 void hci_emit_btstack_version() { 1175 uint8_t event[6]; 1176 event[0] = BTSTACK_EVENT_VERSION; 1177 event[1] = sizeof(event) - 2; 1178 event[2] = BTSTACK_MAJOR; 1179 event[3] = BTSTACK_MINOR; 1180 bt_store_16(event, 4, BTSTACK_REVISION); 1181 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1182 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1183 } 1184 1185 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1186 uint8_t event[3]; 1187 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1188 event[1] = sizeof(event) - 2; 1189 event[2] = enabled; 1190 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1191 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1192 } 1193 1194 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1195 uint8_t event[2+1+6+248]; 1196 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1197 event[1] = sizeof(event) - 2; 1198 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1199 bt_flip_addr(&event[3], *addr); 1200 memcpy(&event[9], name, 248); 1201 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1202 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1203 } 1204 1205 void hci_emit_discoverable_enabled(uint8_t enabled){ 1206 uint8_t event[3]; 1207 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1208 event[1] = sizeof(event) - 2; 1209 event[2] = enabled; 1210 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1211 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1212 } 1213