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 "config.h" 40 41 #include "hci.h" 42 43 #include <stdarg.h> 44 #include <string.h> 45 #include <stdio.h> 46 47 #ifndef EMBEDDED 48 #include <unistd.h> // gethostbyname 49 #include <btstack/version.h> 50 #endif 51 52 #include "btstack_memory.h" 53 #include "debug.h" 54 #include "hci_dump.h" 55 56 #include <btstack/hci_cmds.h> 57 58 #define HCI_CONNECTION_TIMEOUT_MS 10000 59 60 #ifdef USE_BLUETOOL 61 #include "bt_control_iphone.h" 62 #endif 63 64 // the STACK is here 65 static hci_stack_t hci_stack; 66 67 /** 68 * get connection for a given handle 69 * 70 * @return connection OR NULL, if not found 71 */ 72 hci_connection_t * connection_for_handle(hci_con_handle_t con_handle){ 73 linked_item_t *it; 74 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 75 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 76 return (hci_connection_t *) it; 77 } 78 } 79 return NULL; 80 } 81 82 static void hci_connection_timeout_handler(timer_source_t *timer){ 83 hci_connection_t * connection = linked_item_get_user(&timer->item); 84 #ifdef HAVE_TIME 85 struct timeval tv; 86 gettimeofday(&tv, NULL); 87 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 88 // connections might be timed out 89 hci_emit_l2cap_check_timeout(connection); 90 } 91 #endif 92 #ifdef HAVE_TICK 93 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 94 // connections might be timed out 95 hci_emit_l2cap_check_timeout(connection); 96 } 97 #endif 98 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 99 run_loop_add_timer(timer); 100 } 101 102 static void hci_connection_timestamp(hci_connection_t *connection){ 103 #ifdef HAVE_TIME 104 gettimeofday(&connection->timestamp, NULL); 105 #endif 106 #ifdef HAVE_TICK 107 connection->timestamp = embedded_get_ticks(); 108 #endif 109 } 110 111 /** 112 * create connection for given address 113 * 114 * @return connection OR NULL, if no memory left 115 */ 116 static hci_connection_t * create_connection_for_addr(bd_addr_t addr){ 117 hci_connection_t * conn = btstack_memory_hci_connection_get(); 118 if (!conn) return NULL; 119 BD_ADDR_COPY(conn->address, addr); 120 conn->con_handle = 0xffff; 121 conn->authentication_flags = AUTH_FLAGS_NONE; 122 linked_item_set_user(&conn->timeout.item, conn); 123 conn->timeout.process = hci_connection_timeout_handler; 124 hci_connection_timestamp(conn); 125 conn->acl_recombination_length = 0; 126 conn->acl_recombination_pos = 0; 127 conn->num_acl_packets_sent = 0; 128 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 129 return conn; 130 } 131 132 /** 133 * get connection for given address 134 * 135 * @return connection OR NULL, if not found 136 */ 137 static hci_connection_t * connection_for_address(bd_addr_t address){ 138 linked_item_t *it; 139 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 140 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 141 return (hci_connection_t *) it; 142 } 143 } 144 return NULL; 145 } 146 147 /** 148 * add authentication flags and reset timer 149 */ 150 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 151 bd_addr_t addr; 152 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 153 hci_connection_t * conn = connection_for_address(addr); 154 if (conn) { 155 conn->authentication_flags |= flags; 156 hci_connection_timestamp(conn); 157 } 158 } 159 160 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 161 hci_connection_t * conn = connection_for_handle(handle); 162 if (!conn) return 0; 163 if (!conn->authentication_flags) return 0; 164 if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0; 165 if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0; 166 return 1; 167 } 168 169 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 170 if (hci_stack.remote_device_db) { 171 hci_stack.remote_device_db->delete_link_key(addr); 172 } 173 } 174 175 176 /** 177 * count connections 178 */ 179 static int nr_hci_connections(void){ 180 int count = 0; 181 linked_item_t *it; 182 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 183 return count; 184 } 185 186 /** 187 * Dummy handler called by HCI 188 */ 189 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 190 } 191 192 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 193 hci_connection_t * connection = connection_for_handle(handle); 194 if (!connection) { 195 log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 196 return 0; 197 } 198 return connection->num_acl_packets_sent; 199 } 200 201 uint8_t hci_number_free_acl_slots(){ 202 uint8_t free_slots = hci_stack.total_num_acl_packets; 203 linked_item_t *it; 204 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 205 hci_connection_t * connection = (hci_connection_t *) it; 206 if (free_slots < connection->num_acl_packets_sent) { 207 log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 208 return 0; 209 } 210 free_slots -= connection->num_acl_packets_sent; 211 } 212 return free_slots; 213 } 214 215 int hci_can_send_packet_now(uint8_t packet_type){ 216 217 // check for async hci transport implementations 218 if (hci_stack.hci_transport->can_send_packet_now){ 219 if (!hci_stack.hci_transport->can_send_packet_now(packet_type)){ 220 return 0; 221 } 222 } 223 224 // check regular Bluetooth flow control 225 switch (packet_type) { 226 case HCI_ACL_DATA_PACKET: 227 return hci_number_free_acl_slots(); 228 case HCI_COMMAND_DATA_PACKET: 229 return hci_stack.num_cmd_packets; 230 default: 231 return 0; 232 } 233 } 234 235 int hci_send_acl_packet(uint8_t *packet, int size){ 236 237 // check for free places on BT module 238 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 239 240 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 241 hci_connection_t *connection = connection_for_handle( con_handle); 242 if (!connection) return 0; 243 hci_connection_timestamp(connection); 244 245 // count packet 246 connection->num_acl_packets_sent++; 247 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 248 249 // send packet 250 int err = hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 251 252 return err; 253 } 254 255 static void acl_handler(uint8_t *packet, int size){ 256 257 // get info 258 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 259 hci_connection_t *conn = connection_for_handle(con_handle); 260 uint8_t acl_flags = READ_ACL_FLAGS(packet); 261 uint16_t acl_length = READ_ACL_LENGTH(packet); 262 263 // ignore non-registered handle 264 if (!conn){ 265 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 266 return; 267 } 268 269 // update idle timestamp 270 hci_connection_timestamp(conn); 271 272 // handle different packet types 273 switch (acl_flags & 0x03) { 274 275 case 0x01: // continuation fragment 276 277 // sanity check 278 if (conn->acl_recombination_pos == 0) { 279 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 280 return; 281 } 282 283 // append fragment payload (header already stored) 284 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 285 conn->acl_recombination_pos += acl_length; 286 287 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 288 // conn->acl_recombination_pos, conn->acl_recombination_length); 289 290 // forward complete L2CAP packet if complete. 291 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 292 293 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 294 // reset recombination buffer 295 conn->acl_recombination_length = 0; 296 conn->acl_recombination_pos = 0; 297 } 298 break; 299 300 case 0x02: { // first fragment 301 302 // sanity check 303 if (conn->acl_recombination_pos) { 304 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 305 return; 306 } 307 308 // peek into L2CAP packet! 309 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 310 311 // log_error( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 312 313 // compare fragment size to L2CAP packet size 314 if (acl_length >= l2cap_length + 4){ 315 316 // forward fragment as L2CAP packet 317 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 318 319 } else { 320 // store first fragment and tweak acl length for complete package 321 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 322 conn->acl_recombination_pos = acl_length + 4; 323 conn->acl_recombination_length = l2cap_length; 324 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 325 } 326 break; 327 328 } 329 default: 330 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 331 return; 332 } 333 334 // execute main loop 335 hci_run(); 336 } 337 338 static void hci_shutdown_connection(hci_connection_t *conn){ 339 log_info("Connection closed: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 340 341 // cancel all l2cap connections 342 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 343 344 run_loop_remove_timer(&conn->timeout); 345 346 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 static const uint16_t packet_type_sizes[] = { 354 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 355 HCI_ACL_DH1_SIZE, 0, 0, 0, 356 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 357 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 358 }; 359 360 static uint16_t hci_acl_packet_types_for_buffer_size(uint16_t buffer_size){ 361 uint16_t packet_types = 0; 362 int i; 363 for (i=0;i<16;i++){ 364 if (packet_type_sizes[i] == 0) continue; 365 if (packet_type_sizes[i] <= buffer_size){ 366 packet_types |= 1 << i; 367 } 368 } 369 // flip bits for "may not be used" 370 packet_types ^= 0x3306; 371 return packet_types; 372 } 373 374 uint16_t hci_usable_acl_packet_types(void){ 375 return hci_stack.packet_types; 376 } 377 378 uint8_t* hci_get_outgoing_acl_packet_buffer(void){ 379 // hci packet buffer is >= acl data packet length 380 return hci_stack.hci_packet_buffer; 381 } 382 383 uint16_t hci_max_acl_data_packet_length(){ 384 return hci_stack.acl_data_packet_length; 385 } 386 387 // avoid huge local variables 388 #ifndef EMBEDDED 389 static device_name_t device_name; 390 #endif 391 static void event_handler(uint8_t *packet, int size){ 392 bd_addr_t addr; 393 uint8_t link_type; 394 hci_con_handle_t handle; 395 hci_connection_t * conn; 396 int i; 397 398 // printf("HCI:EVENT:%02x\n", packet[0]); 399 400 switch (packet[0]) { 401 402 case HCI_EVENT_COMMAND_COMPLETE: 403 // get num cmd packets 404 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]); 405 hci_stack.num_cmd_packets = packet[2]; 406 407 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 408 // from offset 5 409 // status 410 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 411 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 412 // ignore: SCO data packet len (8) 413 hci_stack.total_num_acl_packets = packet[9]; 414 // ignore: total num SCO packets 415 if (hci_stack.state == HCI_STATE_INITIALIZING){ 416 // determine usable ACL payload size 417 if (HCI_ACL_PAYLOAD_SIZE < hci_stack.acl_data_packet_length){ 418 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 419 } 420 // determine usable ACL packet types 421 hci_stack.packet_types = hci_acl_packet_types_for_buffer_size(hci_stack.acl_data_packet_length); 422 423 log_error("hci_read_buffer_size: used size %u, count %u, packet types %04x\n", 424 hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets, hci_stack.packet_types); 425 } 426 } 427 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 428 hci_emit_discoverable_enabled(hci_stack.discoverable); 429 } 430 break; 431 432 case HCI_EVENT_COMMAND_STATUS: 433 // get num cmd packets 434 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]); 435 hci_stack.num_cmd_packets = packet[3]; 436 break; 437 438 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 439 for (i=0; i<packet[2];i++){ 440 handle = READ_BT_16(packet, 3 + 2*i); 441 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 442 conn = connection_for_handle(handle); 443 if (!conn){ 444 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 445 continue; 446 } 447 conn->num_acl_packets_sent -= num_packets; 448 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 449 } 450 break; 451 452 case HCI_EVENT_CONNECTION_REQUEST: 453 bt_flip_addr(addr, &packet[2]); 454 // TODO: eval COD 8-10 455 link_type = packet[11]; 456 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 457 if (link_type == 1) { // ACL 458 conn = connection_for_address(addr); 459 if (!conn) { 460 conn = create_connection_for_addr(addr); 461 } 462 if (!conn) { 463 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 464 hci_stack.decline_reason = 0x0d; 465 BD_ADDR_COPY(hci_stack.decline_addr, addr); 466 break; 467 } 468 conn->state = RECEIVED_CONNECTION_REQUEST; 469 hci_run(); 470 } else { 471 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 472 hci_stack.decline_reason = 0x0a; 473 BD_ADDR_COPY(hci_stack.decline_addr, addr); 474 } 475 break; 476 477 case HCI_EVENT_CONNECTION_COMPLETE: 478 // Connection management 479 bt_flip_addr(addr, &packet[5]); 480 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 481 conn = connection_for_address(addr); 482 if (conn) { 483 if (!packet[2]){ 484 conn->state = OPEN; 485 conn->con_handle = READ_BT_16(packet, 3); 486 487 // restart timer 488 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 489 run_loop_add_timer(&conn->timeout); 490 491 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 492 493 hci_emit_nr_connections_changed(); 494 } else { 495 // connection failed, remove entry 496 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 497 btstack_memory_hci_connection_free( conn ); 498 499 // if authentication error, also delete link key 500 if (packet[2] == 0x05) { 501 hci_drop_link_key_for_bd_addr(&addr); 502 } 503 } 504 } 505 break; 506 507 case HCI_EVENT_LINK_KEY_REQUEST: 508 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 509 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 510 if (!hci_stack.remote_device_db) break; 511 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 512 hci_run(); 513 // request already answered 514 return; 515 516 case HCI_EVENT_LINK_KEY_NOTIFICATION: 517 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 518 if (!hci_stack.remote_device_db) break; 519 bt_flip_addr(addr, &packet[2]); 520 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 521 // still forward event to allow dismiss of pairing dialog 522 break; 523 524 case HCI_EVENT_PIN_CODE_REQUEST: 525 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 526 break; 527 528 #ifndef EMBEDDED 529 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 530 if (!hci_stack.remote_device_db) break; 531 if (packet[2]) break; // status not ok 532 bt_flip_addr(addr, &packet[3]); 533 // fix for invalid remote names - terminate on 0xff 534 for (i=0; i<248;i++){ 535 if (packet[9+i] == 0xff){ 536 packet[9+i] = 0; 537 break; 538 } 539 } 540 memset(&device_name, 0, sizeof(device_name_t)); 541 strncpy((char*) device_name, (char*) &packet[9], 248); 542 hci_stack.remote_device_db->put_name(&addr, &device_name); 543 break; 544 545 case HCI_EVENT_INQUIRY_RESULT: 546 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 547 if (!hci_stack.remote_device_db) break; 548 // first send inq result packet 549 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 550 // then send cached remote names 551 for (i=0; i<packet[2];i++){ 552 bt_flip_addr(addr, &packet[3+i*6]); 553 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 554 hci_emit_remote_name_cached(&addr, &device_name); 555 } 556 } 557 return; 558 #endif 559 560 case HCI_EVENT_DISCONNECTION_COMPLETE: 561 if (!packet[2]){ 562 handle = READ_BT_16(packet, 3); 563 hci_connection_t * conn = connection_for_handle(handle); 564 if (conn) { 565 hci_shutdown_connection(conn); 566 } 567 } 568 break; 569 570 case HCI_EVENT_HARDWARE_ERROR: 571 if(hci_stack.control->hw_error){ 572 (*hci_stack.control->hw_error)(); 573 } 574 break; 575 576 #ifdef HAVE_BLE 577 case HCI_EVENT_LE_META: 578 switch (packet[2]) { 579 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 580 // Connection management 581 bt_flip_addr(addr, &packet[8]); 582 log_info("LE Connection_complete (status=%u) %s\n", packet[3], bd_addr_to_str(addr)); 583 // LE connections are auto-accepted, so just create a connection if there isn't one already 584 conn = connection_for_address(addr); 585 if (packet[3]){ 586 if (conn){ 587 // outgoing connection failed, remove entry 588 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 589 btstack_memory_hci_connection_free( conn ); 590 591 } 592 // if authentication error, also delete link key 593 if (packet[3] == 0x05) { 594 hci_drop_link_key_for_bd_addr(&addr); 595 } 596 break; 597 } 598 if (!conn){ 599 conn = create_connection_for_addr(addr); 600 } 601 if (!conn){ 602 // no memory 603 break; 604 } 605 606 conn->state = OPEN; 607 conn->con_handle = READ_BT_16(packet, 4); 608 609 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 610 611 // restart timer 612 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 613 // run_loop_add_timer(&conn->timeout); 614 615 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 616 617 hci_emit_nr_connections_changed(); 618 break; 619 620 default: 621 break; 622 } 623 break; 624 #endif 625 626 default: 627 break; 628 } 629 630 // handle BT initialization 631 if (hci_stack.state == HCI_STATE_INITIALIZING){ 632 // handle H4 synchronization loss on restart 633 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 634 // hci_stack.substate = 0; 635 // } 636 // handle normal init sequence 637 if (hci_stack.substate % 2){ 638 // odd: waiting for event 639 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 640 hci_stack.substate++; 641 } 642 } 643 } 644 645 // help with BT sleep 646 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 647 && hci_stack.substate == 1 648 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 649 hci_stack.substate++; 650 } 651 652 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 653 654 // execute main loop 655 hci_run(); 656 } 657 658 void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 659 switch (packet_type) { 660 case HCI_EVENT_PACKET: 661 event_handler(packet, size); 662 break; 663 case HCI_ACL_DATA_PACKET: 664 acl_handler(packet, size); 665 break; 666 default: 667 break; 668 } 669 } 670 671 /** Register HCI packet handlers */ 672 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 673 hci_stack.packet_handler = handler; 674 } 675 676 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t * remote_device_db){ 677 678 // reference to use transport layer implementation 679 hci_stack.hci_transport = transport; 680 681 // references to used control implementation 682 hci_stack.control = control; 683 684 // reference to used config 685 hci_stack.config = config; 686 687 // no connections yet 688 hci_stack.connections = NULL; 689 hci_stack.discoverable = 0; 690 691 // no pending cmds 692 hci_stack.decline_reason = 0; 693 hci_stack.new_scan_enable_value = 0xff; 694 695 // higher level handler 696 hci_stack.packet_handler = dummy_handler; 697 698 // store and open remote device db 699 hci_stack.remote_device_db = remote_device_db; 700 if (hci_stack.remote_device_db) { 701 hci_stack.remote_device_db->open(); 702 } 703 704 // max acl payload size defined in config.h 705 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 706 707 // register packet handlers with transport 708 transport->register_packet_handler(&packet_handler); 709 } 710 711 void hci_close(){ 712 // close remote device db 713 if (hci_stack.remote_device_db) { 714 hci_stack.remote_device_db->close(); 715 } 716 } 717 718 // State-Module-Driver overview 719 // state module low-level 720 // HCI_STATE_OFF off close 721 // HCI_STATE_INITIALIZING, on open 722 // HCI_STATE_WORKING, on open 723 // HCI_STATE_HALTING, on open 724 // HCI_STATE_SLEEPING, off/sleep close 725 // HCI_STATE_FALLING_ASLEEP on open 726 727 static int hci_power_control_on(void){ 728 729 // power on 730 int err = 0; 731 if (hci_stack.control && hci_stack.control->on){ 732 err = (*hci_stack.control->on)(hci_stack.config); 733 } 734 if (err){ 735 log_error( "POWER_ON failed\n"); 736 hci_emit_hci_open_failed(); 737 return err; 738 } 739 740 // open low-level device 741 err = hci_stack.hci_transport->open(hci_stack.config); 742 if (err){ 743 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 744 if (hci_stack.control && hci_stack.control->off){ 745 (*hci_stack.control->off)(hci_stack.config); 746 } 747 hci_emit_hci_open_failed(); 748 return err; 749 } 750 return 0; 751 } 752 753 static void hci_power_control_off(void){ 754 755 log_info("hci_power_control_off\n"); 756 757 // close low-level device 758 hci_stack.hci_transport->close(hci_stack.config); 759 760 log_info("hci_power_control_off - hci_transport closed\n"); 761 762 // power off 763 if (hci_stack.control && hci_stack.control->off){ 764 (*hci_stack.control->off)(hci_stack.config); 765 } 766 767 log_info("hci_power_control_off - control closed\n"); 768 769 hci_stack.state = HCI_STATE_OFF; 770 } 771 772 static void hci_power_control_sleep(void){ 773 774 log_info("hci_power_control_sleep\n"); 775 776 #if 0 777 // don't close serial port during sleep 778 779 // close low-level device 780 hci_stack.hci_transport->close(hci_stack.config); 781 #endif 782 783 // sleep mode 784 if (hci_stack.control && hci_stack.control->sleep){ 785 (*hci_stack.control->sleep)(hci_stack.config); 786 } 787 788 hci_stack.state = HCI_STATE_SLEEPING; 789 } 790 791 static int hci_power_control_wake(void){ 792 793 log_info("hci_power_control_wake\n"); 794 795 // wake on 796 if (hci_stack.control && hci_stack.control->wake){ 797 (*hci_stack.control->wake)(hci_stack.config); 798 } 799 800 #if 0 801 // open low-level device 802 int err = hci_stack.hci_transport->open(hci_stack.config); 803 if (err){ 804 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 805 if (hci_stack.control && hci_stack.control->off){ 806 (*hci_stack.control->off)(hci_stack.config); 807 } 808 hci_emit_hci_open_failed(); 809 return err; 810 } 811 #endif 812 813 return 0; 814 } 815 816 817 int hci_power_control(HCI_POWER_MODE power_mode){ 818 819 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 820 821 int err = 0; 822 switch (hci_stack.state){ 823 824 case HCI_STATE_OFF: 825 switch (power_mode){ 826 case HCI_POWER_ON: 827 err = hci_power_control_on(); 828 if (err) return err; 829 // set up state machine 830 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 831 hci_stack.state = HCI_STATE_INITIALIZING; 832 hci_stack.substate = 0; 833 break; 834 case HCI_POWER_OFF: 835 // do nothing 836 break; 837 case HCI_POWER_SLEEP: 838 // do nothing (with SLEEP == OFF) 839 break; 840 } 841 break; 842 843 case HCI_STATE_INITIALIZING: 844 switch (power_mode){ 845 case HCI_POWER_ON: 846 // do nothing 847 break; 848 case HCI_POWER_OFF: 849 // no connections yet, just turn it off 850 hci_power_control_off(); 851 break; 852 case HCI_POWER_SLEEP: 853 // no connections yet, just turn it off 854 hci_power_control_sleep(); 855 break; 856 } 857 break; 858 859 case HCI_STATE_WORKING: 860 switch (power_mode){ 861 case HCI_POWER_ON: 862 // do nothing 863 break; 864 case HCI_POWER_OFF: 865 // see hci_run 866 hci_stack.state = HCI_STATE_HALTING; 867 break; 868 case HCI_POWER_SLEEP: 869 // see hci_run 870 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 871 hci_stack.substate = 0; 872 break; 873 } 874 break; 875 876 case HCI_STATE_HALTING: 877 switch (power_mode){ 878 case HCI_POWER_ON: 879 // set up state machine 880 hci_stack.state = HCI_STATE_INITIALIZING; 881 hci_stack.substate = 0; 882 break; 883 case HCI_POWER_OFF: 884 // do nothing 885 break; 886 case HCI_POWER_SLEEP: 887 // see hci_run 888 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 889 hci_stack.substate = 0; 890 break; 891 } 892 break; 893 894 case HCI_STATE_FALLING_ASLEEP: 895 switch (power_mode){ 896 case HCI_POWER_ON: 897 898 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 899 // nothing to do, if H4 supports power management 900 if (bt_control_iphone_power_management_enabled()){ 901 hci_stack.state = HCI_STATE_INITIALIZING; 902 hci_stack.substate = 6; 903 break; 904 } 905 #endif 906 // set up state machine 907 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 908 hci_stack.state = HCI_STATE_INITIALIZING; 909 hci_stack.substate = 0; 910 break; 911 case HCI_POWER_OFF: 912 // see hci_run 913 hci_stack.state = HCI_STATE_HALTING; 914 break; 915 case HCI_POWER_SLEEP: 916 // do nothing 917 break; 918 } 919 break; 920 921 case HCI_STATE_SLEEPING: 922 switch (power_mode){ 923 case HCI_POWER_ON: 924 925 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 926 // nothing to do, if H4 supports power management 927 if (bt_control_iphone_power_management_enabled()){ 928 hci_stack.state = HCI_STATE_INITIALIZING; 929 hci_stack.substate = 6; 930 break; 931 } 932 #endif 933 err = hci_power_control_wake(); 934 if (err) return err; 935 // set up state machine 936 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 937 hci_stack.state = HCI_STATE_INITIALIZING; 938 hci_stack.substate = 0; 939 break; 940 case HCI_POWER_OFF: 941 hci_stack.state = HCI_STATE_HALTING; 942 break; 943 case HCI_POWER_SLEEP: 944 // do nothing 945 break; 946 } 947 break; 948 } 949 950 // create internal event 951 hci_emit_state(); 952 953 // trigger next/first action 954 hci_run(); 955 956 return 0; 957 } 958 959 void hci_discoverable_control(uint8_t enable){ 960 if (enable) enable = 1; // normalize argument 961 962 if (hci_stack.discoverable == enable){ 963 hci_emit_discoverable_enabled(hci_stack.discoverable); 964 return; 965 } 966 967 // store request to send command but accept in higher layer view 968 hci_stack.new_scan_enable_value = 2 | enable; // 1 = inq scan, 2 = page scan 969 hci_stack.discoverable = enable; 970 971 hci_run(); 972 } 973 974 void hci_run(){ 975 976 hci_connection_t * connection; 977 linked_item_t * it; 978 979 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 980 981 // global/non-connection oriented commands 982 983 // decline incoming connections 984 if (hci_stack.decline_reason){ 985 uint8_t reason = hci_stack.decline_reason; 986 hci_stack.decline_reason = 0; 987 hci_send_cmd(&hci_reject_connection_request, hci_stack.decline_addr, reason); 988 } 989 990 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 991 992 // send scan enable 993 if (hci_stack.new_scan_enable_value != 0xff){ 994 hci_send_cmd(&hci_write_scan_enable, hci_stack.new_scan_enable_value); 995 hci_stack.new_scan_enable_value = 0xff; 996 } 997 998 // send pending HCI commands 999 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 1000 1001 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1002 1003 connection = (hci_connection_t *) it; 1004 1005 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 1006 log_info("sending hci_accept_connection_request\n"); 1007 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1008 connection->state = ACCEPTED_CONNECTION_REQUEST; 1009 } 1010 1011 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1012 1013 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1014 link_key_t link_key; 1015 log_info("responding to link key request\n"); 1016 if ( hci_stack.remote_device_db->get_link_key( &connection->address, &link_key)){ 1017 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1018 } else { 1019 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1020 } 1021 connection->authentication_flags &= ~HANDLE_LINK_KEY_REQUEST; 1022 } 1023 } 1024 1025 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1026 1027 switch (hci_stack.state){ 1028 case HCI_STATE_INITIALIZING: 1029 // log_info("hci_init: substate %u\n", hci_stack.substate); 1030 if (hci_stack.substate % 2) { 1031 // odd: waiting for command completion 1032 return; 1033 } 1034 switch (hci_stack.substate >> 1){ 1035 case 0: // RESET 1036 hci_send_cmd(&hci_reset); 1037 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 1038 // skip baud change 1039 hci_stack.substate = 4; // >> 1 = 2 1040 } 1041 break; 1042 case 1: // SEND BAUD CHANGE 1043 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_packet_buffer); 1044 hci_send_cmd_packet(hci_stack.hci_packet_buffer, 3 + hci_stack.hci_packet_buffer[2]); 1045 break; 1046 case 2: // LOCAL BAUD CHANGE 1047 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 1048 hci_stack.substate += 2; 1049 // break missing here for fall through 1050 1051 case 3: 1052 // custom initialization 1053 if (hci_stack.control && hci_stack.control->next_cmd){ 1054 int valid_cmd = (*hci_stack.control->next_cmd)(hci_stack.config, hci_stack.hci_packet_buffer); 1055 if (valid_cmd){ 1056 int size = 3 + hci_stack.hci_packet_buffer[2]; 1057 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack.hci_packet_buffer, size); 1058 hci_stack.substate = 4; // more init commands 1059 break; 1060 } 1061 log_info("hci_run: init script done\n\r"); 1062 } 1063 // otherwise continue 1064 hci_send_cmd(&hci_read_bd_addr); 1065 break; 1066 case 4: 1067 hci_send_cmd(&hci_read_buffer_size); 1068 break; 1069 case 5: 1070 // ca. 15 sec 1071 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1072 break; 1073 case 6: 1074 hci_send_cmd(&hci_write_scan_enable, 2 | hci_stack.discoverable); // page scan 1075 break; 1076 case 7: 1077 #ifndef EMBEDDED 1078 { 1079 char hostname[30]; 1080 gethostname(hostname, 30); 1081 hostname[29] = '\0'; 1082 hci_send_cmd(&hci_write_local_name, hostname); 1083 break; 1084 } 1085 case 8: 1086 #ifdef USE_BLUETOOL 1087 hci_send_cmd(&hci_write_class_of_device, 0x007a020c); // Smartphone 1088 break; 1089 1090 case 9: 1091 #endif 1092 #endif 1093 // done. 1094 hci_stack.state = HCI_STATE_WORKING; 1095 hci_emit_state(); 1096 break; 1097 default: 1098 break; 1099 } 1100 hci_stack.substate++; 1101 break; 1102 1103 case HCI_STATE_HALTING: 1104 1105 log_info("HCI_STATE_HALTING\n"); 1106 // close all open connections 1107 connection = (hci_connection_t *) hci_stack.connections; 1108 if (connection){ 1109 1110 // send disconnect 1111 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1112 1113 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1114 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1115 1116 // send disconnected event right away - causes higher layer connections to get closed, too. 1117 hci_shutdown_connection(connection); 1118 return; 1119 } 1120 log_info("HCI_STATE_HALTING, calling off\n"); 1121 1122 // switch mode 1123 hci_power_control_off(); 1124 1125 log_info("HCI_STATE_HALTING, emitting state\n"); 1126 hci_emit_state(); 1127 log_info("HCI_STATE_HALTING, done\n"); 1128 break; 1129 1130 case HCI_STATE_FALLING_ASLEEP: 1131 switch(hci_stack.substate) { 1132 case 0: 1133 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1134 // close all open connections 1135 connection = (hci_connection_t *) hci_stack.connections; 1136 1137 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1138 // don't close connections, if H4 supports power management 1139 if (bt_control_iphone_power_management_enabled()){ 1140 connection = NULL; 1141 } 1142 #endif 1143 if (connection){ 1144 1145 // send disconnect 1146 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1147 1148 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1149 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1150 1151 // send disconnected event right away - causes higher layer connections to get closed, too. 1152 hci_shutdown_connection(connection); 1153 return; 1154 } 1155 1156 // disable page and inquiry scan 1157 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1158 1159 log_info("HCI_STATE_HALTING, disabling inq & page scans\n"); 1160 hci_send_cmd(&hci_write_scan_enable, 0); // none 1161 1162 // continue in next sub state 1163 hci_stack.substate++; 1164 break; 1165 case 1: 1166 // wait for command complete "hci_write_scan_enable" in event_handler(); 1167 break; 1168 case 2: 1169 log_info("HCI_STATE_HALTING, calling sleep\n"); 1170 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1171 // don't actually go to sleep, if H4 supports power management 1172 if (bt_control_iphone_power_management_enabled()){ 1173 // SLEEP MODE reached 1174 hci_stack.state = HCI_STATE_SLEEPING; 1175 hci_emit_state(); 1176 break; 1177 } 1178 #endif 1179 // switch mode 1180 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1181 hci_emit_state(); 1182 break; 1183 1184 default: 1185 break; 1186 } 1187 break; 1188 1189 default: 1190 break; 1191 } 1192 } 1193 1194 int hci_send_cmd_packet(uint8_t *packet, int size){ 1195 bd_addr_t addr; 1196 hci_connection_t * conn; 1197 // house-keeping 1198 1199 // create_connection? 1200 if (IS_COMMAND(packet, hci_create_connection)){ 1201 bt_flip_addr(addr, &packet[3]); 1202 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1203 conn = connection_for_address(addr); 1204 if (conn) { 1205 // if connection exists 1206 if (conn->state == OPEN) { 1207 // and OPEN, emit connection complete command 1208 hci_emit_connection_complete(conn, 0); 1209 } 1210 // otherwise, just ignore as it is already in the open process 1211 return 0; // don't sent packet to controller 1212 1213 } 1214 // create connection struct and register, state = SENT_CREATE_CONNECTION 1215 conn = create_connection_for_addr(addr); 1216 if (!conn){ 1217 // notify client that alloc failed 1218 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1219 return 0; // don't sent packet to controller 1220 } 1221 conn->state = SENT_CREATE_CONNECTION; 1222 } 1223 1224 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1225 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1226 } 1227 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1228 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1229 } 1230 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1231 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1232 } 1233 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1234 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 1235 } 1236 1237 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1238 if (hci_stack.remote_device_db){ 1239 bt_flip_addr(addr, &packet[3]); 1240 hci_stack.remote_device_db->delete_link_key(&addr); 1241 } 1242 } 1243 1244 hci_stack.num_cmd_packets--; 1245 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1246 } 1247 1248 /** 1249 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1250 */ 1251 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1252 va_list argptr; 1253 va_start(argptr, cmd); 1254 uint16_t size = hci_create_cmd_internal(hci_stack.hci_packet_buffer, cmd, argptr); 1255 va_end(argptr); 1256 return hci_send_cmd_packet(hci_stack.hci_packet_buffer, size); 1257 } 1258 1259 // Create various non-HCI events. 1260 // TODO: generalize, use table similar to hci_create_command 1261 1262 void hci_emit_state(){ 1263 uint8_t event[3]; 1264 event[0] = BTSTACK_EVENT_STATE; 1265 event[1] = sizeof(event) - 2; 1266 event[2] = hci_stack.state; 1267 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1268 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1269 } 1270 1271 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1272 uint8_t event[13]; 1273 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1274 event[1] = sizeof(event) - 2; 1275 event[2] = status; 1276 bt_store_16(event, 3, conn->con_handle); 1277 bt_flip_addr(&event[5], conn->address); 1278 event[11] = 1; // ACL connection 1279 event[12] = 0; // encryption disabled 1280 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1281 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1282 } 1283 1284 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1285 uint8_t event[6]; 1286 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1287 event[1] = sizeof(event) - 2; 1288 event[2] = 0; // status = OK 1289 bt_store_16(event, 3, handle); 1290 event[5] = reason; 1291 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1292 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1293 } 1294 1295 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1296 uint8_t event[4]; 1297 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1298 event[1] = sizeof(event) - 2; 1299 bt_store_16(event, 2, conn->con_handle); 1300 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1301 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1302 } 1303 1304 void hci_emit_nr_connections_changed(){ 1305 uint8_t event[3]; 1306 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1307 event[1] = sizeof(event) - 2; 1308 event[2] = nr_hci_connections(); 1309 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1310 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1311 } 1312 1313 void hci_emit_hci_open_failed(){ 1314 uint8_t event[2]; 1315 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1316 event[1] = sizeof(event) - 2; 1317 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1318 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1319 } 1320 1321 #ifndef EMBEDDED 1322 void hci_emit_btstack_version() { 1323 uint8_t event[6]; 1324 event[0] = BTSTACK_EVENT_VERSION; 1325 event[1] = sizeof(event) - 2; 1326 event[2] = BTSTACK_MAJOR; 1327 event[3] = BTSTACK_MINOR; 1328 bt_store_16(event, 4, BTSTACK_REVISION); 1329 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1330 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1331 } 1332 #endif 1333 1334 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1335 uint8_t event[3]; 1336 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1337 event[1] = sizeof(event) - 2; 1338 event[2] = enabled; 1339 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1340 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1341 } 1342 1343 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1344 uint8_t event[2+1+6+248]; 1345 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1346 event[1] = sizeof(event) - 2; 1347 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1348 bt_flip_addr(&event[3], *addr); 1349 memcpy(&event[9], name, 248); 1350 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1351 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1352 } 1353 1354 void hci_emit_discoverable_enabled(uint8_t enabled){ 1355 uint8_t event[3]; 1356 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1357 event[1] = sizeof(event) - 2; 1358 event[2] = enabled; 1359 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1360 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1361 } 1362