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 <unistd.h> 42 #include <stdarg.h> 43 #include <string.h> 44 #include <stdio.h> 45 46 #include "debug.h" 47 #include "hci_dump.h" 48 49 #include "../include/btstack/hci_cmds.h" 50 #include "../include/btstack/version.h" 51 52 // temp 53 #include "l2cap.h" 54 55 #define HCI_CONNECTION_TIMEOUT_MS 10000 56 57 // the STACK is here 58 static hci_stack_t hci_stack; 59 60 /** 61 * get connection for a given handle 62 * 63 * @return connection OR NULL, if not found 64 */ 65 hci_connection_t * connection_for_handle(hci_con_handle_t con_handle){ 66 linked_item_t *it; 67 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 68 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 69 return (hci_connection_t *) it; 70 } 71 } 72 return NULL; 73 } 74 75 static void hci_connection_timeout_handler(timer_source_t *timer){ 76 hci_connection_t * connection = linked_item_get_user(&timer->item); 77 struct timeval tv; 78 gettimeofday(&tv, NULL); 79 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 80 // connections might be timed out 81 hci_emit_l2cap_check_timeout(connection); 82 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 83 } else { 84 // next timeout check at 85 timer->timeout.tv_sec = connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000; 86 } 87 run_loop_add_timer(timer); 88 } 89 90 static void hci_connection_timestamp(hci_connection_t *connection){ 91 gettimeofday(&connection->timestamp, NULL); 92 } 93 94 /** 95 * create connection for given address 96 * 97 * @return connection OR NULL, if not found 98 */ 99 static hci_connection_t * create_connection_for_addr(bd_addr_t addr){ 100 hci_connection_t * conn = malloc( sizeof(hci_connection_t) ); 101 if (!conn) return NULL; 102 BD_ADDR_COPY(conn->address, addr); 103 conn->con_handle = 0xffff; 104 conn->flags = 0; 105 linked_item_set_user(&conn->timeout.item, conn); 106 conn->timeout.process = hci_connection_timeout_handler; 107 hci_connection_timestamp(conn); 108 conn->acl_recombination_length = 0; 109 conn->acl_recombination_pos = 0; 110 conn->num_acl_packets_sent = 0; 111 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 112 return conn; 113 } 114 115 /** 116 * get connection for given address 117 * 118 * @return connection OR NULL, if not found 119 */ 120 static hci_connection_t * connection_for_address(bd_addr_t address){ 121 linked_item_t *it; 122 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 123 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 124 return (hci_connection_t *) it; 125 } 126 } 127 return NULL; 128 } 129 130 /** 131 * count connections 132 */ 133 static int nr_hci_connections(){ 134 int count = 0; 135 linked_item_t *it; 136 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 137 return count; 138 } 139 140 /** 141 * Dummy handler called by HCI 142 */ 143 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 144 } 145 146 /** 147 * Dummy control handler 148 */ 149 static int null_control_function(void *config){ 150 return 0; 151 } 152 static const char * null_control_name(void *config){ 153 return "Hardware unknown"; 154 } 155 static bt_control_t null_control = { 156 null_control_function, 157 null_control_function, 158 null_control_function, 159 null_control_name 160 }; 161 162 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 163 hci_connection_t * connection = connection_for_handle(handle); 164 if (!connection) { 165 log_err("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 166 return 0; 167 } 168 return connection->num_acl_packets_sent; 169 } 170 171 uint8_t hci_number_free_acl_slots(){ 172 uint8_t free_slots = hci_stack.total_num_acl_packets; 173 linked_item_t *it; 174 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 175 hci_connection_t * connection = (hci_connection_t *) it; 176 if (free_slots < connection->num_acl_packets_sent) { 177 log_err("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 178 return 0; 179 } 180 free_slots -= connection->num_acl_packets_sent; 181 } 182 return free_slots; 183 } 184 185 int hci_ready_to_send(hci_con_handle_t handle){ 186 return hci_number_free_acl_slots() && hci_number_outgoing_packets(handle) < 2; 187 } 188 189 int hci_send_acl_packet(uint8_t *packet, int size){ 190 191 // update idle timestamp 192 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 193 hci_connection_t *connection = connection_for_handle( con_handle); 194 if (!connection) return 0; 195 hci_connection_timestamp(connection); 196 197 // count packet 198 connection->num_acl_packets_sent++; 199 log_dbg("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 200 201 // send packet 202 return hci_stack.hci_transport->send_acl_packet(packet, size); 203 } 204 205 static void acl_handler(uint8_t *packet, int size){ 206 207 // get info 208 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 209 hci_connection_t *conn = connection_for_handle(con_handle); 210 uint8_t acl_flags = READ_ACL_FLAGS(packet); 211 uint16_t acl_length = READ_ACL_LENGTH(packet); 212 213 // ignore non-registered handle 214 if (!conn){ 215 log_err( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 216 return; 217 } 218 219 // update idle timestamp 220 hci_connection_timestamp(conn); 221 222 // handle different packet types 223 switch (acl_flags & 0x03) { 224 225 case 0x01: // continuation fragment 226 227 // sanity check 228 if (conn->acl_recombination_pos == 0) { 229 log_err( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 230 return; 231 } 232 233 // append fragment payload (header already stored) 234 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 235 conn->acl_recombination_pos += acl_length; 236 237 // log_err( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", 238 // acl_length, connection->acl_recombination_pos, connection->acl_recombination_length); 239 240 // forward complete L2CAP packet if complete. 241 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 242 243 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 244 // reset recombination buffer 245 conn->acl_recombination_length = 0; 246 conn->acl_recombination_pos = 0; 247 } 248 break; 249 250 case 0x02: { // first fragment 251 252 // sanity check 253 if (conn->acl_recombination_pos) { 254 log_err( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 255 return; 256 } 257 258 // peek into L2CAP packet! 259 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 260 261 // compare fragment size to L2CAP packet size 262 if (acl_length >= l2cap_length + 4){ 263 264 // forward fragment as L2CAP packet 265 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 266 267 } else { 268 // store first fragment and tweak acl length for complete package 269 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 270 conn->acl_recombination_pos = acl_length + 4; 271 conn->acl_recombination_length = l2cap_length; 272 bt_store_16(conn->acl_recombination_buffer, 2, acl_length +4); 273 // log_err( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 274 } 275 break; 276 277 } 278 default: 279 log_err( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 280 return; 281 } 282 283 // execute main loop 284 hci_run(); 285 } 286 287 static void event_handler(uint8_t *packet, int size){ 288 bd_addr_t addr; 289 hci_con_handle_t handle; 290 hci_connection_t * conn; 291 int i; 292 293 // get num_cmd_packets 294 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 295 // Get Num_HCI_Command_Packets 296 hci_stack.num_cmd_packets = packet[2]; 297 } 298 299 switch (packet[0]) { 300 301 case HCI_EVENT_COMMAND_COMPLETE: 302 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 303 // from offset 5 304 // status 305 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 306 // ignore: SCO data packet len (8) 307 hci_stack.total_num_acl_packets = packet[9]; 308 // ignore: total num SCO packets 309 if (hci_stack.state == HCI_STATE_INITIALIZING){ 310 log_dbg("hci_read_buffer_size: size %u, count %u\n", hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 311 } 312 } 313 break; 314 315 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 316 for (i=0; i<packet[2];i++){ 317 handle = READ_BT_16(packet, 3 + 2*i); 318 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 319 conn = connection_for_handle(handle); 320 if (!conn){ 321 log_err("hci_number_completed_packet lists unused con handle %u\n", handle); 322 continue; 323 } 324 conn->num_acl_packets_sent -= num_packets; 325 log_dbg("hci_number_completed_packet (hci) %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 326 } 327 break; 328 329 case HCI_EVENT_CONNECTION_REQUEST: 330 bt_flip_addr(addr, &packet[2]); 331 // TODO: eval COD 8-10 332 uint8_t link_type = packet[11]; 333 log_dbg("Connection_incoming: "); print_bd_addr(addr); log_dbg(", type %u\n", link_type); 334 if (link_type == 1) { // ACL 335 conn = connection_for_address(addr); 336 if (!conn) { 337 conn = create_connection_for_addr(addr); 338 } 339 // TODO: check for malloc failure 340 conn->state = ACCEPTED_CONNECTION_REQUEST; 341 hci_send_cmd(&hci_accept_connection_request, addr, 1); 342 } else { 343 // TODO: decline request 344 } 345 break; 346 347 case HCI_EVENT_CONNECTION_COMPLETE: 348 // Connection management 349 bt_flip_addr(addr, &packet[5]); 350 log_dbg("Connection_complete (status=%u)", packet[2]); print_bd_addr(addr); log_dbg("\n"); 351 conn = connection_for_address(addr); 352 if (conn) { 353 if (!packet[2]){ 354 conn->state = OPEN; 355 conn->con_handle = READ_BT_16(packet, 3); 356 conn->flags = 0; 357 358 gettimeofday(&conn->timestamp, NULL); 359 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 360 run_loop_add_timer(&conn->timeout); 361 362 log_dbg("New connection: handle %u, ", conn->con_handle); 363 print_bd_addr( conn->address ); 364 log_dbg("\n"); 365 366 hci_emit_nr_connections_changed(); 367 } else { 368 // connection failed, remove entry 369 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 370 free( conn ); 371 } 372 } 373 break; 374 375 case HCI_EVENT_DISCONNECTION_COMPLETE: 376 if (!packet[2]){ 377 handle = READ_BT_16(packet, 3); 378 hci_connection_t * conn = connection_for_handle(handle); 379 if (conn) { 380 log_dbg("Connection closed: handle %u, ", conn->con_handle); 381 print_bd_addr( conn->address ); 382 log_dbg("\n"); 383 run_loop_remove_timer(&conn->timeout); 384 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 385 free( conn ); 386 hci_emit_nr_connections_changed(); 387 } 388 } 389 break; 390 391 default: 392 break; 393 } 394 395 // handle BT initialization 396 if (hci_stack.state == HCI_STATE_INITIALIZING){ 397 // handle H4 synchronization loss on restart 398 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 399 // hci_stack.substate = 0; 400 // } 401 // handle normal init sequence 402 if (hci_stack.substate % 2){ 403 // odd: waiting for event 404 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 405 hci_stack.substate++; 406 } 407 } 408 } 409 410 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 411 412 // execute main loop 413 hci_run(); 414 } 415 416 void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 417 switch (packet_type) { 418 case HCI_EVENT_PACKET: 419 event_handler(packet, size); 420 break; 421 case HCI_ACL_DATA_PACKET: 422 acl_handler(packet, size); 423 break; 424 default: 425 break; 426 } 427 } 428 429 /** Register HCI packet handlers */ 430 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 431 hci_stack.packet_handler = handler; 432 } 433 434 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control){ 435 436 // reference to use transport layer implementation 437 hci_stack.hci_transport = transport; 438 439 // references to used control implementation 440 if (control) { 441 hci_stack.control = control; 442 } else { 443 hci_stack.control = &null_control; 444 } 445 446 // reference to used config 447 hci_stack.config = config; 448 449 // no connections yet 450 hci_stack.connections = NULL; 451 452 // empty cmd buffer 453 hci_stack.hci_cmd_buffer = malloc(3+255); 454 455 // higher level handler 456 hci_stack.packet_handler = dummy_handler; 457 458 // register packet handlers with transport 459 transport->register_packet_handler(&packet_handler); 460 } 461 462 int hci_power_control(HCI_POWER_MODE power_mode){ 463 if (power_mode == HCI_POWER_ON && hci_stack.state == HCI_STATE_OFF) { 464 465 // power on 466 int err = hci_stack.control->on(hci_stack.config); 467 if (err){ 468 log_err( "POWER_ON failed\n"); 469 hci_emit_hci_open_failed(); 470 return err; 471 } 472 473 // open low-level device 474 err = hci_stack.hci_transport->open(hci_stack.config); 475 if (err){ 476 log_err( "HCI_INIT failed, turning Bluetooth off again\n"); 477 hci_stack.control->off(hci_stack.config); 478 hci_emit_hci_open_failed(); 479 return err; 480 } 481 482 // set up state machine 483 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 484 hci_stack.state = HCI_STATE_INITIALIZING; 485 hci_stack.substate = 0; 486 487 } else if (power_mode == HCI_POWER_OFF && hci_stack.state == HCI_STATE_WORKING){ 488 489 // close low-level device 490 hci_stack.hci_transport->close(hci_stack.config); 491 492 // power off 493 hci_stack.control->off(hci_stack.config); 494 495 // we're off now 496 hci_stack.state = HCI_STATE_OFF; 497 } 498 499 // create internal event 500 hci_emit_state(); 501 502 // trigger next/first action 503 hci_run(); 504 505 return 0; 506 } 507 508 void hci_run(){ 509 switch (hci_stack.state){ 510 case HCI_STATE_INITIALIZING: 511 if (hci_stack.substate % 2) { 512 // odd: waiting for command completion 513 return; 514 } 515 if (hci_stack.num_cmd_packets == 0) { 516 // cannot send command yet 517 return; 518 } 519 switch (hci_stack.substate/2){ 520 case 0: 521 hci_send_cmd(&hci_reset); 522 break; 523 case 1: 524 hci_send_cmd(&hci_read_bd_addr); 525 break; 526 case 2: 527 hci_send_cmd(&hci_read_buffer_size); 528 break; 529 case 3: 530 // ca. 15 sec 531 hci_send_cmd(&hci_write_page_timeout, 0x6000); 532 break; 533 case 4: 534 hci_send_cmd(&hci_write_scan_enable, 3); // 3 inq scan + page scan 535 break; 536 case 5: 537 // done. 538 hci_stack.state = HCI_STATE_WORKING; 539 hci_emit_state(); 540 break; 541 default: 542 break; 543 } 544 hci_stack.substate++; 545 break; 546 default: 547 break; 548 } 549 } 550 551 int hci_send_cmd_packet(uint8_t *packet, int size){ 552 bd_addr_t addr; 553 hci_connection_t * conn; 554 // house-keeping 555 556 // create_connection? 557 if (IS_COMMAND(packet, hci_create_connection)){ 558 bt_flip_addr(addr, &packet[3]); 559 log_dbg("Create_connection to "); print_bd_addr(addr); log_dbg("\n"); 560 conn = connection_for_address(addr); 561 if (conn) { 562 // if connection exists 563 if (conn->state == OPEN) { 564 // if OPEN, emit connection complete command 565 hci_emit_connection_complete(conn); 566 } 567 // otherwise, just ignore 568 return 0; // don't sent packet to controller 569 570 } else{ 571 conn = create_connection_for_addr(addr); 572 if (conn){ 573 // create connection struct and register, state = SENT_CREATE_CONNECTION 574 conn->state = SENT_CREATE_CONNECTION; 575 } 576 } 577 } 578 579 // accept connection 580 581 // reject connection 582 583 // close_connection? 584 // set state = SENT_DISCONNECT 585 586 hci_stack.num_cmd_packets--; 587 return hci_stack.hci_transport->send_cmd_packet(packet, size); 588 } 589 590 /** 591 * pre: numcmds >= 0 - it's allowed to send a command to the controller 592 */ 593 int hci_send_cmd(hci_cmd_t *cmd, ...){ 594 va_list argptr; 595 va_start(argptr, cmd); 596 uint8_t * hci_cmd_buffer = hci_stack.hci_cmd_buffer; 597 uint16_t size = hci_create_cmd_internal(hci_stack.hci_cmd_buffer, cmd, argptr); 598 va_end(argptr); 599 return hci_send_cmd_packet(hci_cmd_buffer, size); 600 } 601 602 // Create various non-HCI events. 603 // TODO: generalize, use table similar to hci_create_command 604 605 void hci_emit_state(){ 606 uint8_t len = 3; 607 uint8_t event[len]; 608 event[0] = BTSTACK_EVENT_STATE; 609 event[1] = len - 3; 610 event[2] = hci_stack.state; 611 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 612 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 613 } 614 615 void hci_emit_connection_complete(hci_connection_t *conn){ 616 uint8_t len = 13; 617 uint8_t event[len]; 618 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 619 event[1] = len - 3; 620 event[2] = 0; // status = OK 621 bt_store_16(event, 3, conn->con_handle); 622 bt_flip_addr(&event[5], conn->address); 623 event[11] = 1; // ACL connection 624 event[12] = 0; // encryption disabled 625 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 626 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 627 } 628 629 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 630 uint8_t len = 4; 631 uint8_t event[len]; 632 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 633 event[1] = len - 2; 634 bt_store_16(event, 2, conn->con_handle); 635 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 636 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 637 } 638 639 void hci_emit_nr_connections_changed(){ 640 uint8_t len = 3; 641 uint8_t event[len]; 642 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 643 event[1] = len - 2; 644 event[2] = nr_hci_connections(); 645 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 646 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 647 } 648 649 void hci_emit_hci_open_failed(){ 650 uint8_t len = 2; 651 uint8_t event[len]; 652 event[0] = BTSTACK_EVENT_POWERON_FAILED; 653 event[1] = len - 2; 654 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 655 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 656 } 657 658 659 void hci_emit_btstack_version() { 660 uint8_t len = 6; 661 uint8_t event[len]; 662 event[0] = BTSTACK_EVENT_VERSION; 663 event[1] = len - 2; 664 event[len++] = BTSTACK_MAJOR; 665 event[len++] = BTSTACK_MINOR; 666 bt_store_16(event, len, BTSTACK_REVISION); 667 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 668 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 669 } 670 671 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 672 uint8_t len = 3; 673 uint8_t event[len]; 674 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 675 event[1] = len - 2; 676 event[2] = enabled; 677 hci_dump_packet( HCI_EVENT_PACKET, 0, event, len); 678 hci_stack.packet_handler(HCI_EVENT_PACKET, event, len); 679 } 680