1 /* 2 * Copyright (C) 2009-2012 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 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at [email protected] 34 * 35 */ 36 37 /* 38 * hci.c 39 * 40 * Created by Matthias Ringwald on 4/29/09. 41 * 42 */ 43 44 #include "btstack-config.h" 45 46 #include "hci.h" 47 #include "gap.h" 48 49 #include <stdarg.h> 50 #include <string.h> 51 #include <stdio.h> 52 53 #ifndef EMBEDDED 54 #include <unistd.h> // gethostbyname 55 #include <btstack/version.h> 56 #endif 57 58 #include "btstack_memory.h" 59 #include "debug.h" 60 #include "hci_dump.h" 61 62 #include <btstack/hci_cmds.h> 63 64 #define HCI_CONNECTION_TIMEOUT_MS 10000 65 66 #define HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP 11 67 68 #ifdef USE_BLUETOOL 69 #include "bt_control_iphone.h" 70 #endif 71 72 static void hci_update_scan_enable(void); 73 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 74 static void hci_connection_timeout_handler(timer_source_t *timer); 75 static void hci_connection_timestamp(hci_connection_t *connection); 76 static int hci_power_control_on(void); 77 static void hci_power_control_off(void); 78 static void hci_state_reset(); 79 80 // the STACK is here 81 #ifndef HAVE_MALLOC 82 static hci_stack_t hci_stack_static; 83 #endif 84 static hci_stack_t * hci_stack = NULL; 85 86 // test helper 87 static uint8_t disable_l2cap_timeouts = 0; 88 89 /** 90 * create connection for given address 91 * 92 * @return connection OR NULL, if no memory left 93 */ 94 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 95 96 log_info("create_connection_for_addr %s", bd_addr_to_str(addr)); 97 hci_connection_t * conn = (hci_connection_t *) btstack_memory_hci_connection_get(); 98 if (!conn) return NULL; 99 BD_ADDR_COPY(conn->address, addr); 100 conn->address_type = addr_type; 101 conn->con_handle = 0xffff; 102 conn->authentication_flags = AUTH_FLAGS_NONE; 103 conn->bonding_flags = 0; 104 conn->requested_security_level = LEVEL_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 a given handle 117 * 118 * @return connection OR NULL, if not found 119 */ 120 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 121 linked_item_t *it; 122 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 123 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 124 return (hci_connection_t *) it; 125 } 126 } 127 return NULL; 128 } 129 130 /** 131 * get connection for given address 132 * 133 * @return connection OR NULL, if not found 134 */ 135 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t * addr, bd_addr_type_t addr_type){ 136 linked_item_t *it; 137 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 138 hci_connection_t * connection = (hci_connection_t *) it; 139 if (connection->address_type != addr_type) continue; 140 if (memcmp(addr, connection->address, 6) != 0) continue; 141 return connection; 142 } 143 return NULL; 144 } 145 146 static void hci_connection_timeout_handler(timer_source_t *timer){ 147 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 148 #ifdef HAVE_TIME 149 struct timeval tv; 150 gettimeofday(&tv, NULL); 151 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 152 // connections might be timed out 153 hci_emit_l2cap_check_timeout(connection); 154 } 155 #endif 156 #ifdef HAVE_TICK 157 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 158 // connections might be timed out 159 hci_emit_l2cap_check_timeout(connection); 160 } 161 #endif 162 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 163 run_loop_add_timer(timer); 164 } 165 166 static void hci_connection_timestamp(hci_connection_t *connection){ 167 #ifdef HAVE_TIME 168 gettimeofday(&connection->timestamp, NULL); 169 #endif 170 #ifdef HAVE_TICK 171 connection->timestamp = embedded_get_ticks(); 172 #endif 173 } 174 175 176 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 177 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 178 } 179 180 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 181 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 182 } 183 184 185 /** 186 * add authentication flags and reset timer 187 * @note: assumes classic connection 188 */ 189 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 190 bd_addr_t addr; 191 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 192 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 193 if (conn) { 194 connectionSetAuthenticationFlags(conn, flags); 195 hci_connection_timestamp(conn); 196 } 197 } 198 199 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 200 hci_connection_t * conn = hci_connection_for_handle(handle); 201 if (!conn) return 0; 202 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 203 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 204 return 0; 205 } 206 207 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 208 if (hci_stack->remote_device_db) { 209 hci_stack->remote_device_db->delete_link_key(addr); 210 } 211 } 212 213 int hci_is_le_connection(hci_connection_t * connection){ 214 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 215 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 216 } 217 218 219 /** 220 * count connections 221 */ 222 static int nr_hci_connections(void){ 223 int count = 0; 224 linked_item_t *it; 225 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 226 return count; 227 } 228 229 /** 230 * Dummy handler called by HCI 231 */ 232 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 233 } 234 235 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 236 hci_connection_t * connection = hci_connection_for_handle(handle); 237 if (!connection) { 238 log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 239 return 0; 240 } 241 return connection->num_acl_packets_sent; 242 } 243 244 uint8_t hci_number_free_acl_slots(){ 245 uint8_t free_slots = hci_stack->total_num_acl_packets; 246 linked_item_t *it; 247 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 248 hci_connection_t * connection = (hci_connection_t *) it; 249 if (free_slots < connection->num_acl_packets_sent) { 250 log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 251 return 0; 252 } 253 free_slots -= connection->num_acl_packets_sent; 254 } 255 return free_slots; 256 } 257 258 int hci_can_send_packet_now(uint8_t packet_type){ 259 260 // check for async hci transport implementations 261 if (hci_stack->hci_transport->can_send_packet_now){ 262 if (!hci_stack->hci_transport->can_send_packet_now(packet_type)){ 263 return 0; 264 } 265 } 266 267 // check regular Bluetooth flow control 268 switch (packet_type) { 269 case HCI_ACL_DATA_PACKET: 270 return hci_number_free_acl_slots(); 271 case HCI_COMMAND_DATA_PACKET: 272 return hci_stack->num_cmd_packets; 273 default: 274 return 0; 275 } 276 } 277 278 // same as hci_can_send_packet_now, but also checks if packet buffer is free for use 279 int hci_can_send_packet_now_using_packet_buffer(uint8_t packet_type){ 280 if (hci_stack->hci_packet_buffer_reserved) return 0; 281 return hci_can_send_packet_now(packet_type); 282 } 283 284 // used for internal checks in l2cap[-le].c 285 int hci_is_packet_buffer_reserved(void){ 286 return hci_stack->hci_packet_buffer_reserved; 287 } 288 289 // reserves outgoing packet buffer. @returns 1 if successful 290 int hci_reserve_packet_buffer(void){ 291 if (hci_stack->hci_packet_buffer_reserved) return 0; 292 hci_stack->hci_packet_buffer_reserved = 1; 293 return 1; 294 } 295 296 void hci_release_packet_buffer(void){ 297 hci_stack->hci_packet_buffer_reserved = 0; 298 } 299 300 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 301 int hci_transport_synchronous(void){ 302 return hci_stack->hci_transport->can_send_packet_now == NULL; 303 } 304 305 int hci_send_acl_packet(uint8_t *packet, int size){ 306 307 // check for free places on BT module 308 if (!hci_number_free_acl_slots()) { 309 hci_release_packet_buffer(); 310 return BTSTACK_ACL_BUFFERS_FULL; 311 } 312 313 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 314 hci_connection_t *connection = hci_connection_for_handle( con_handle); 315 if (!connection) { 316 hci_release_packet_buffer(); 317 return 0; 318 } 319 hci_connection_timestamp(connection); 320 321 // count packet 322 connection->num_acl_packets_sent++; 323 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 324 325 // send packet 326 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 327 328 // free packet buffer for synchronous transport implementations 329 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 330 hci_release_packet_buffer(); 331 } 332 333 return err; 334 } 335 336 static void acl_handler(uint8_t *packet, int size){ 337 338 // log_info("acl_handler: size %u", size); 339 340 // get info 341 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 342 hci_connection_t *conn = hci_connection_for_handle(con_handle); 343 uint8_t acl_flags = READ_ACL_FLAGS(packet); 344 uint16_t acl_length = READ_ACL_LENGTH(packet); 345 346 // ignore non-registered handle 347 if (!conn){ 348 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 349 return; 350 } 351 352 // assert packet is complete 353 if (acl_length + 4 != size){ 354 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 355 return; 356 } 357 358 // update idle timestamp 359 hci_connection_timestamp(conn); 360 361 // handle different packet types 362 switch (acl_flags & 0x03) { 363 364 case 0x01: // continuation fragment 365 366 // sanity check 367 if (conn->acl_recombination_pos == 0) { 368 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 369 return; 370 } 371 372 // append fragment payload (header already stored) 373 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 374 conn->acl_recombination_pos += acl_length; 375 376 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 377 // conn->acl_recombination_pos, conn->acl_recombination_length); 378 379 // forward complete L2CAP packet if complete. 380 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 381 382 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 383 // reset recombination buffer 384 conn->acl_recombination_length = 0; 385 conn->acl_recombination_pos = 0; 386 } 387 break; 388 389 case 0x02: { // first fragment 390 391 // sanity check 392 if (conn->acl_recombination_pos) { 393 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 394 return; 395 } 396 397 // peek into L2CAP packet! 398 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 399 400 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 401 402 // compare fragment size to L2CAP packet size 403 if (acl_length >= l2cap_length + 4){ 404 405 // forward fragment as L2CAP packet 406 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 407 408 } else { 409 // store first fragment and tweak acl length for complete package 410 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 411 conn->acl_recombination_pos = acl_length + 4; 412 conn->acl_recombination_length = l2cap_length; 413 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 414 } 415 break; 416 417 } 418 default: 419 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 420 return; 421 } 422 423 // execute main loop 424 hci_run(); 425 } 426 427 static void hci_shutdown_connection(hci_connection_t *conn){ 428 log_info("Connection closed: handle 0x%x, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 429 430 run_loop_remove_timer(&conn->timeout); 431 432 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 433 btstack_memory_hci_connection_free( conn ); 434 435 // now it's gone 436 hci_emit_nr_connections_changed(); 437 } 438 439 static const uint16_t packet_type_sizes[] = { 440 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 441 HCI_ACL_DH1_SIZE, 0, 0, 0, 442 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 443 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 444 }; 445 static const uint8_t packet_type_feature_requirement_bit[] = { 446 0, // 3 slot packets 447 1, // 5 slot packets 448 25, // EDR 2 mpbs 449 26, // EDR 3 mbps 450 39, // 3 slot EDR packts 451 40, // 5 slot EDR packet 452 }; 453 static const uint16_t packet_type_feature_packet_mask[] = { 454 0x0f00, // 3 slot packets 455 0xf000, // 5 slot packets 456 0x1102, // EDR 2 mpbs 457 0x2204, // EDR 3 mbps 458 0x0300, // 3 slot EDR packts 459 0x3000, // 5 slot EDR packet 460 }; 461 462 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 463 // enable packet types based on size 464 uint16_t packet_types = 0; 465 int i; 466 for (i=0;i<16;i++){ 467 if (packet_type_sizes[i] == 0) continue; 468 if (packet_type_sizes[i] <= buffer_size){ 469 packet_types |= 1 << i; 470 } 471 } 472 // disable packet types due to missing local supported features 473 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 474 int bit_idx = packet_type_feature_requirement_bit[i]; 475 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 476 if (feature_set) continue; 477 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 478 packet_types &= ~packet_type_feature_packet_mask[i]; 479 } 480 // flip bits for "may not be used" 481 packet_types ^= 0x3306; 482 return packet_types; 483 } 484 485 uint16_t hci_usable_acl_packet_types(void){ 486 return hci_stack->packet_types; 487 } 488 489 uint8_t* hci_get_outgoing_packet_buffer(void){ 490 // hci packet buffer is >= acl data packet length 491 return hci_stack->hci_packet_buffer; 492 } 493 494 uint16_t hci_max_acl_data_packet_length(void){ 495 return hci_stack->acl_data_packet_length; 496 } 497 498 int hci_non_flushable_packet_boundary_flag_supported(void){ 499 // No. 54, byte 6, bit 6 500 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 501 } 502 503 int hci_ssp_supported(void){ 504 // No. 51, byte 6, bit 3 505 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 506 } 507 508 int hci_classic_supported(void){ 509 // No. 37, byte 4, bit 5, = No BR/EDR Support 510 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 511 } 512 513 int hci_le_supported(void){ 514 #ifdef HAVE_BLE 515 // No. 37, byte 4, bit 6 = LE Supported (Controller) 516 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 517 #else 518 return 0; 519 #endif 520 } 521 522 // get addr type and address used in advertisement packets 523 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t * addr){ 524 *addr_type = hci_stack->adv_addr_type; 525 if (hci_stack->adv_addr_type){ 526 memcpy(addr, hci_stack->adv_address, 6); 527 } else { 528 memcpy(addr, hci_stack->local_bd_addr, 6); 529 } 530 } 531 532 #ifdef HAVE_BLE 533 void le_handle_advertisement_report(uint8_t *packet, int size){ 534 int num_reports = packet[3]; 535 int i; 536 int total_data_length = 0; 537 int data_offset = 0; 538 539 for (i=0; i<num_reports;i++){ 540 total_data_length += packet[4+num_reports*8+i]; 541 } 542 543 for (i=0; i<num_reports;i++){ 544 int pos = 0; 545 uint8_t data_length = packet[4+num_reports*8+i]; 546 uint8_t event_size = 10 + data_length; 547 uint8_t event[2 + event_size ]; 548 event[pos++] = GAP_LE_ADVERTISING_REPORT; 549 event[pos++] = event_size; 550 event[pos++] = packet[4+i]; // event_type; 551 event[pos++] = packet[4+num_reports+i]; // address_type; 552 memcpy(&event[pos], &packet[4+num_reports*2+i*6], 6); // bt address 553 pos += 6; 554 event[pos++] = packet[4+num_reports*9+total_data_length + i]; 555 event[pos++] = data_length; 556 memcpy(&event[pos], &packet[4+num_reports*9+data_offset], data_length); 557 data_offset += data_length; 558 pos += data_length; 559 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 560 } 561 } 562 #endif 563 564 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 565 if (hci_stack->substate % 2){ 566 // odd: waiting for event 567 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 568 uint16_t opcode = READ_BT_16(packet,3); 569 if (opcode == hci_stack->last_cmd_opcode){ 570 hci_stack->substate++; 571 log_info("Command complete for expected opcode %04x -> new substate %u", opcode, hci_stack->substate); 572 } else { 573 log_info("Command complete for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 574 } 575 } 576 if (packet[0] == HCI_EVENT_COMMAND_STATUS){ 577 uint8_t status = packet[2]; 578 uint16_t opcode = READ_BT_16(packet,4); 579 if (opcode == hci_stack->last_cmd_opcode){ 580 if (status){ 581 hci_stack->substate++; 582 log_error("Command status error 0x%02x for expected opcode %04x -> new substate %u", status, opcode, hci_stack->substate); 583 } else { 584 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 585 } 586 } else { 587 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 588 } 589 } 590 } 591 } 592 593 static void hci_initializing_state_machine(){ 594 // log_info("hci_init: substate %u\n", hci_stack->substate); 595 if (hci_stack->substate % 2) { 596 // odd: waiting for command completion 597 return; 598 } 599 switch (hci_stack->substate >> 1){ 600 case 0: // RESET 601 hci_state_reset(); 602 603 hci_send_cmd(&hci_reset); 604 if (hci_stack->config == NULL || ((hci_uart_config_t *)hci_stack->config)->baudrate_main == 0){ 605 // skip baud change 606 hci_stack->substate = 4; // >> 1 = 2 607 } 608 break; 609 case 1: // SEND BAUD CHANGE 610 hci_stack->control->baudrate_cmd(hci_stack->config, ((hci_uart_config_t *)hci_stack->config)->baudrate_main, hci_stack->hci_packet_buffer); 611 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 612 break; 613 case 2: // LOCAL BAUD CHANGE 614 log_info("Local baud rate change"); 615 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 616 hci_stack->hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack->config)->baudrate_main); 617 hci_stack->substate += 2; 618 // break missing here for fall through 619 620 case 3: 621 log_info("Custom init"); 622 // Custom initialization 623 if (hci_stack->control && hci_stack->control->next_cmd){ 624 int valid_cmd = (*hci_stack->control->next_cmd)(hci_stack->config, hci_stack->hci_packet_buffer); 625 if (valid_cmd){ 626 int size = 3 + hci_stack->hci_packet_buffer[2]; 627 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 628 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 629 hci_stack->substate = 4; // more init commands 630 break; 631 } 632 log_info("hci_run: init script done\n\r"); 633 } 634 // otherwise continue 635 hci_send_cmd(&hci_read_bd_addr); 636 break; 637 case 4: 638 hci_send_cmd(&hci_read_buffer_size); 639 break; 640 case 5: 641 hci_send_cmd(&hci_read_local_supported_features); 642 break; 643 case 6: 644 if (hci_le_supported()){ 645 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 646 } else { 647 // Kensington Bluetoot 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 648 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 649 } 650 651 // skip Classic init commands for LE only chipsets 652 if (!hci_classic_supported()){ 653 if (hci_le_supported()){ 654 hci_stack->substate = 11 << 1; // skip all classic command 655 } else { 656 log_error("Neither BR/EDR nor LE supported"); 657 hci_stack->substate = 14 << 1; // skip all 658 } 659 } 660 break; 661 case 7: 662 if (hci_ssp_supported()){ 663 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 664 break; 665 } 666 hci_stack->substate += 2; 667 // break missing here for fall through 668 669 case 8: 670 // ca. 15 sec 671 hci_send_cmd(&hci_write_page_timeout, 0x6000); 672 break; 673 case 9: 674 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 675 break; 676 case 10: 677 if (hci_stack->local_name){ 678 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 679 } else { 680 char hostname[30]; 681 #ifdef EMBEDDED 682 // BTstack-11:22:33:44:55:66 683 strcpy(hostname, "BTstack "); 684 strcat(hostname, bd_addr_to_str(hci_stack->local_bd_addr)); 685 log_info("---> Name %s", hostname); 686 #else 687 // hostname for POSIX systems 688 gethostname(hostname, 30); 689 hostname[29] = '\0'; 690 #endif 691 hci_send_cmd(&hci_write_local_name, hostname); 692 } 693 break; 694 case 11: 695 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 696 if (!hci_le_supported()){ 697 // SKIP LE init for Classic only configuration 698 hci_stack->substate = 14 << 1; 699 } 700 break; 701 702 #ifdef HAVE_BLE 703 // LE INIT 704 case 12: 705 hci_send_cmd(&hci_le_read_buffer_size); 706 break; 707 case 13: 708 // LE Supported Host = 1, Simultaneous Host = 0 709 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 710 break; 711 case 14: 712 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 713 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 714 break; 715 #endif 716 717 // DONE 718 case 15: 719 // done. 720 hci_stack->state = HCI_STATE_WORKING; 721 hci_emit_state(); 722 break; 723 default: 724 break; 725 } 726 hci_stack->substate++; 727 } 728 729 // avoid huge local variables 730 #ifndef EMBEDDED 731 static device_name_t device_name; 732 #endif 733 static void event_handler(uint8_t *packet, int size){ 734 735 uint16_t event_length = packet[1]; 736 737 // assert packet is complete 738 if (size != event_length + 2){ 739 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 740 return; 741 } 742 743 bd_addr_t addr; 744 bd_addr_type_t addr_type; 745 uint8_t link_type; 746 hci_con_handle_t handle; 747 hci_connection_t * conn; 748 int i; 749 750 // printf("HCI:EVENT:%02x\n", packet[0]); 751 752 switch (packet[0]) { 753 754 case HCI_EVENT_COMMAND_COMPLETE: 755 // get num cmd packets 756 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack->num_cmd_packets, packet[2]); 757 hci_stack->num_cmd_packets = packet[2]; 758 759 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 760 // from offset 5 761 // status 762 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 763 hci_stack->acl_data_packet_length = READ_BT_16(packet, 6); 764 // ignore: SCO data packet len (8) 765 hci_stack->total_num_acl_packets = packet[9]; 766 // ignore: total num SCO packets 767 if (hci_stack->state == HCI_STATE_INITIALIZING){ 768 // determine usable ACL payload size 769 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 770 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 771 } 772 log_info("hci_read_buffer_size: used size %u, count %u\n", 773 hci_stack->acl_data_packet_length, hci_stack->total_num_acl_packets); 774 } 775 } 776 #ifdef HAVE_BLE 777 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 778 hci_stack->le_data_packet_length = READ_BT_16(packet, 6); 779 hci_stack->total_num_le_packets = packet[8]; 780 log_info("hci_le_read_buffer_size: size %u, count %u\n", hci_stack->le_data_packet_length, hci_stack->total_num_le_packets); 781 782 // use LE buffers if no clasic buffers have been reported 783 if (hci_stack->total_num_acl_packets == 0){ 784 log_info("use le buffers instead of classic ones"); 785 hci_stack->total_num_acl_packets = hci_stack->total_num_le_packets; 786 hci_stack->acl_data_packet_length = hci_stack->le_data_packet_length; 787 // determine usable ACL payload size 788 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 789 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 790 } 791 } 792 } 793 #endif 794 // Dump local address 795 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 796 bt_flip_addr(hci_stack->local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 797 log_info("Local Address, Status: 0x%02x: Addr: %s\n", 798 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 799 } 800 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 801 hci_emit_discoverable_enabled(hci_stack->discoverable); 802 } 803 // Note: HCI init checks 804 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 805 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 806 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 807 hci_stack->local_supported_features[0], hci_stack->local_supported_features[1], 808 hci_stack->local_supported_features[2], hci_stack->local_supported_features[3], 809 hci_stack->local_supported_features[4], hci_stack->local_supported_features[5], 810 hci_stack->local_supported_features[6], hci_stack->local_supported_features[7]); 811 812 // determine usable ACL packet types based buffer size and supported features 813 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(hci_stack->acl_data_packet_length, &hci_stack->local_supported_features[0]); 814 log_info("packet types %04x", hci_stack->packet_types); 815 816 // Classic/LE 817 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 818 } 819 break; 820 821 case HCI_EVENT_COMMAND_STATUS: 822 // get num cmd packets 823 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack->num_cmd_packets, packet[3]); 824 hci_stack->num_cmd_packets = packet[3]; 825 break; 826 827 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 828 for (i=0; i<packet[2];i++){ 829 handle = READ_BT_16(packet, 3 + 2*i); 830 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 831 conn = hci_connection_for_handle(handle); 832 if (!conn){ 833 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 834 continue; 835 } 836 conn->num_acl_packets_sent -= num_packets; 837 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 838 } 839 break; 840 841 case HCI_EVENT_CONNECTION_REQUEST: 842 bt_flip_addr(addr, &packet[2]); 843 // TODO: eval COD 8-10 844 link_type = packet[11]; 845 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 846 if (link_type == 1) { // ACL 847 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 848 if (!conn) { 849 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 850 } 851 if (!conn) { 852 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 853 hci_stack->decline_reason = 0x0d; 854 BD_ADDR_COPY(hci_stack->decline_addr, addr); 855 break; 856 } 857 conn->state = RECEIVED_CONNECTION_REQUEST; 858 hci_run(); 859 } else { 860 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 861 hci_stack->decline_reason = 0x0a; 862 BD_ADDR_COPY(hci_stack->decline_addr, addr); 863 } 864 break; 865 866 case HCI_EVENT_CONNECTION_COMPLETE: 867 // Connection management 868 bt_flip_addr(addr, &packet[5]); 869 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 870 addr_type = BD_ADDR_TYPE_CLASSIC; 871 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 872 if (conn) { 873 if (!packet[2]){ 874 conn->state = OPEN; 875 conn->con_handle = READ_BT_16(packet, 3); 876 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 877 878 // restart timer 879 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 880 run_loop_add_timer(&conn->timeout); 881 882 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 883 884 hci_emit_nr_connections_changed(); 885 } else { 886 // notify client if dedicated bonding 887 if (conn->bonding_flags & BONDING_DEDICATED){ 888 hci_emit_dedicated_bonding_result(conn, packet[2]); 889 } 890 891 // connection failed, remove entry 892 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 893 btstack_memory_hci_connection_free( conn ); 894 895 // if authentication error, also delete link key 896 if (packet[2] == 0x05) { 897 hci_drop_link_key_for_bd_addr(&addr); 898 } 899 } 900 } 901 break; 902 903 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 904 handle = READ_BT_16(packet, 3); 905 conn = hci_connection_for_handle(handle); 906 if (!conn) break; 907 if (!packet[2]){ 908 uint8_t * features = &packet[5]; 909 if (features[6] & (1 << 3)){ 910 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 911 } 912 } 913 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 914 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x", conn->bonding_flags); 915 if (conn->bonding_flags & BONDING_DEDICATED){ 916 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 917 } 918 break; 919 920 case HCI_EVENT_LINK_KEY_REQUEST: 921 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 922 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 923 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 924 if (hci_stack->bondable && !hci_stack->remote_device_db) break; 925 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 926 hci_run(); 927 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 928 return; 929 930 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 931 bt_flip_addr(addr, &packet[2]); 932 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 933 if (!conn) break; 934 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 935 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 936 // Change Connection Encryption keeps link key type 937 if (link_key_type != CHANGED_COMBINATION_KEY){ 938 conn->link_key_type = link_key_type; 939 } 940 if (!hci_stack->remote_device_db) break; 941 hci_stack->remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8], conn->link_key_type); 942 // still forward event to allow dismiss of pairing dialog 943 break; 944 } 945 946 case HCI_EVENT_PIN_CODE_REQUEST: 947 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 948 // non-bondable mode: pin code negative reply will be sent 949 if (!hci_stack->bondable){ 950 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 951 hci_run(); 952 return; 953 } 954 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 955 if (!hci_stack->remote_device_db) break; 956 bt_flip_addr(addr, &packet[2]); 957 hci_stack->remote_device_db->delete_link_key(&addr); 958 break; 959 960 case HCI_EVENT_IO_CAPABILITY_REQUEST: 961 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 962 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 963 break; 964 965 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 966 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 967 if (!hci_stack->ssp_auto_accept) break; 968 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 969 break; 970 971 case HCI_EVENT_USER_PASSKEY_REQUEST: 972 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 973 if (!hci_stack->ssp_auto_accept) break; 974 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 975 break; 976 977 case HCI_EVENT_ENCRYPTION_CHANGE: 978 handle = READ_BT_16(packet, 3); 979 conn = hci_connection_for_handle(handle); 980 if (!conn) break; 981 if (packet[2] == 0) { 982 if (packet[5]){ 983 conn->authentication_flags |= CONNECTION_ENCRYPTED; 984 } else { 985 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 986 } 987 } 988 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 989 break; 990 991 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 992 handle = READ_BT_16(packet, 3); 993 conn = hci_connection_for_handle(handle); 994 if (!conn) break; 995 996 // dedicated bonding: send result and disconnect 997 if (conn->bonding_flags & BONDING_DEDICATED){ 998 conn->bonding_flags &= ~BONDING_DEDICATED; 999 hci_emit_dedicated_bonding_result( conn, packet[2]); 1000 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1001 break; 1002 } 1003 1004 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1005 // link key sufficient for requested security 1006 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1007 break; 1008 } 1009 // not enough 1010 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1011 break; 1012 1013 #ifndef EMBEDDED 1014 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1015 if (!hci_stack->remote_device_db) break; 1016 if (packet[2]) break; // status not ok 1017 bt_flip_addr(addr, &packet[3]); 1018 // fix for invalid remote names - terminate on 0xff 1019 for (i=0; i<248;i++){ 1020 if (packet[9+i] == 0xff){ 1021 packet[9+i] = 0; 1022 break; 1023 } 1024 } 1025 memset(&device_name, 0, sizeof(device_name_t)); 1026 strncpy((char*) device_name, (char*) &packet[9], 248); 1027 hci_stack->remote_device_db->put_name(&addr, &device_name); 1028 break; 1029 1030 case HCI_EVENT_INQUIRY_RESULT: 1031 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 1032 if (!hci_stack->remote_device_db) break; 1033 // first send inq result packet 1034 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1035 // then send cached remote names 1036 for (i=0; i<packet[2];i++){ 1037 bt_flip_addr(addr, &packet[3+i*6]); 1038 if (hci_stack->remote_device_db->get_name(&addr, &device_name)){ 1039 hci_emit_remote_name_cached(&addr, &device_name); 1040 } 1041 } 1042 return; 1043 #endif 1044 1045 case HCI_EVENT_DISCONNECTION_COMPLETE: 1046 if (!packet[2]){ 1047 handle = READ_BT_16(packet, 3); 1048 hci_connection_t * conn = hci_connection_for_handle(handle); 1049 if (conn) { 1050 hci_shutdown_connection(conn); 1051 } 1052 } 1053 break; 1054 1055 case HCI_EVENT_HARDWARE_ERROR: 1056 if(hci_stack->control && hci_stack->control->hw_error){ 1057 (*hci_stack->control->hw_error)(); 1058 } else { 1059 // if no special requests, just reboot stack 1060 hci_power_control_off(); 1061 hci_power_control_on(); 1062 } 1063 break; 1064 1065 case DAEMON_EVENT_HCI_PACKET_SENT: 1066 // free packet buffer for asynchronous transport 1067 if (hci_transport_synchronous()) break; 1068 hci_stack->hci_packet_buffer_reserved = 0; 1069 break; 1070 1071 #ifdef HAVE_BLE 1072 case HCI_EVENT_LE_META: 1073 switch (packet[2]){ 1074 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1075 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1076 le_handle_advertisement_report(packet, size); 1077 break; 1078 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1079 // Connection management 1080 bt_flip_addr(addr, &packet[8]); 1081 addr_type = (bd_addr_type_t)packet[7]; 1082 log_info("LE Connection_complete (status=%u) type %u, %s\n", packet[3], addr_type, bd_addr_to_str(addr)); 1083 // LE connections are auto-accepted, so just create a connection if there isn't one already 1084 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 1085 if (packet[3]){ 1086 if (conn){ 1087 // outgoing connection failed, remove entry 1088 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1089 btstack_memory_hci_connection_free( conn ); 1090 } 1091 // if authentication error, also delete link key 1092 if (packet[3] == 0x05) { 1093 hci_drop_link_key_for_bd_addr(&addr); 1094 } 1095 break; 1096 } 1097 if (!conn){ 1098 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1099 } 1100 if (!conn){ 1101 // no memory 1102 break; 1103 } 1104 1105 conn->state = OPEN; 1106 conn->con_handle = READ_BT_16(packet, 4); 1107 1108 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1109 1110 // restart timer 1111 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1112 // run_loop_add_timer(&conn->timeout); 1113 1114 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 1115 1116 hci_emit_nr_connections_changed(); 1117 break; 1118 1119 // printf("LE buffer size: %u, count %u\n", READ_BT_16(packet,6), packet[8]); 1120 1121 default: 1122 break; 1123 } 1124 break; 1125 #endif 1126 default: 1127 break; 1128 } 1129 1130 // handle BT initialization 1131 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1132 hci_initializing_event_handler(packet, size); 1133 } 1134 1135 // help with BT sleep 1136 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1137 && hci_stack->substate == 1 1138 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1139 hci_stack->substate++; 1140 } 1141 1142 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1143 1144 // execute main loop 1145 hci_run(); 1146 } 1147 1148 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1149 switch (packet_type) { 1150 case HCI_EVENT_PACKET: 1151 event_handler(packet, size); 1152 break; 1153 case HCI_ACL_DATA_PACKET: 1154 acl_handler(packet, size); 1155 break; 1156 default: 1157 break; 1158 } 1159 } 1160 1161 /** Register HCI packet handlers */ 1162 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1163 hci_stack->packet_handler = handler; 1164 } 1165 1166 static void hci_state_reset(){ 1167 // no connections yet 1168 hci_stack->connections = NULL; 1169 1170 // keep discoverable/connectable as this has been requested by the client(s) 1171 // hci_stack->discoverable = 0; 1172 // hci_stack->connectable = 0; 1173 // hci_stack->bondable = 1; 1174 1175 // buffer is free 1176 hci_stack->hci_packet_buffer_reserved = 0; 1177 1178 // no pending cmds 1179 hci_stack->decline_reason = 0; 1180 hci_stack->new_scan_enable_value = 0xff; 1181 1182 // LE 1183 hci_stack->adv_addr_type = 0; 1184 memset(hci_stack->adv_address, 0, 6); 1185 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1186 hci_stack->le_scan_type = 0xff; 1187 } 1188 1189 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 1190 1191 #ifdef HAVE_MALLOC 1192 if (!hci_stack) { 1193 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1194 } 1195 #else 1196 hci_stack = &hci_stack_static; 1197 #endif 1198 memset(hci_stack, 0, sizeof(hci_stack_t)); 1199 1200 // reference to use transport layer implementation 1201 hci_stack->hci_transport = transport; 1202 1203 // references to used control implementation 1204 hci_stack->control = control; 1205 1206 // reference to used config 1207 hci_stack->config = config; 1208 1209 // higher level handler 1210 hci_stack->packet_handler = dummy_handler; 1211 1212 // store and open remote device db 1213 hci_stack->remote_device_db = remote_device_db; 1214 if (hci_stack->remote_device_db) { 1215 hci_stack->remote_device_db->open(); 1216 } 1217 1218 // max acl payload size defined in config.h 1219 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1220 1221 // register packet handlers with transport 1222 transport->register_packet_handler(&packet_handler); 1223 1224 hci_stack->state = HCI_STATE_OFF; 1225 1226 // class of device 1227 hci_stack->class_of_device = 0x007a020c; // Smartphone 1228 1229 // bondable by default 1230 hci_stack->bondable = 1; 1231 1232 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1233 hci_stack->ssp_enable = 1; 1234 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1235 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1236 hci_stack->ssp_auto_accept = 1; 1237 1238 hci_state_reset(); 1239 } 1240 1241 void hci_close(){ 1242 // close remote device db 1243 if (hci_stack->remote_device_db) { 1244 hci_stack->remote_device_db->close(); 1245 } 1246 while (hci_stack->connections) { 1247 // cancel all l2cap connections 1248 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 1249 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1250 } 1251 hci_power_control(HCI_POWER_OFF); 1252 1253 #ifdef HAVE_MALLOC 1254 free(hci_stack); 1255 #endif 1256 hci_stack = NULL; 1257 } 1258 1259 void hci_set_class_of_device(uint32_t class_of_device){ 1260 hci_stack->class_of_device = class_of_device; 1261 } 1262 1263 void hci_disable_l2cap_timeout_check(){ 1264 disable_l2cap_timeouts = 1; 1265 } 1266 // State-Module-Driver overview 1267 // state module low-level 1268 // HCI_STATE_OFF off close 1269 // HCI_STATE_INITIALIZING, on open 1270 // HCI_STATE_WORKING, on open 1271 // HCI_STATE_HALTING, on open 1272 // HCI_STATE_SLEEPING, off/sleep close 1273 // HCI_STATE_FALLING_ASLEEP on open 1274 1275 static int hci_power_control_on(void){ 1276 1277 // power on 1278 int err = 0; 1279 if (hci_stack->control && hci_stack->control->on){ 1280 err = (*hci_stack->control->on)(hci_stack->config); 1281 } 1282 if (err){ 1283 log_error( "POWER_ON failed\n"); 1284 hci_emit_hci_open_failed(); 1285 return err; 1286 } 1287 1288 // open low-level device 1289 err = hci_stack->hci_transport->open(hci_stack->config); 1290 if (err){ 1291 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1292 if (hci_stack->control && hci_stack->control->off){ 1293 (*hci_stack->control->off)(hci_stack->config); 1294 } 1295 hci_emit_hci_open_failed(); 1296 return err; 1297 } 1298 return 0; 1299 } 1300 1301 static void hci_power_control_off(void){ 1302 1303 log_info("hci_power_control_off\n"); 1304 1305 // close low-level device 1306 hci_stack->hci_transport->close(hci_stack->config); 1307 1308 log_info("hci_power_control_off - hci_transport closed\n"); 1309 1310 // power off 1311 if (hci_stack->control && hci_stack->control->off){ 1312 (*hci_stack->control->off)(hci_stack->config); 1313 } 1314 1315 log_info("hci_power_control_off - control closed\n"); 1316 1317 hci_stack->state = HCI_STATE_OFF; 1318 } 1319 1320 static void hci_power_control_sleep(void){ 1321 1322 log_info("hci_power_control_sleep\n"); 1323 1324 #if 0 1325 // don't close serial port during sleep 1326 1327 // close low-level device 1328 hci_stack->hci_transport->close(hci_stack->config); 1329 #endif 1330 1331 // sleep mode 1332 if (hci_stack->control && hci_stack->control->sleep){ 1333 (*hci_stack->control->sleep)(hci_stack->config); 1334 } 1335 1336 hci_stack->state = HCI_STATE_SLEEPING; 1337 } 1338 1339 static int hci_power_control_wake(void){ 1340 1341 log_info("hci_power_control_wake\n"); 1342 1343 // wake on 1344 if (hci_stack->control && hci_stack->control->wake){ 1345 (*hci_stack->control->wake)(hci_stack->config); 1346 } 1347 1348 #if 0 1349 // open low-level device 1350 int err = hci_stack->hci_transport->open(hci_stack->config); 1351 if (err){ 1352 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1353 if (hci_stack->control && hci_stack->control->off){ 1354 (*hci_stack->control->off)(hci_stack->config); 1355 } 1356 hci_emit_hci_open_failed(); 1357 return err; 1358 } 1359 #endif 1360 1361 return 0; 1362 } 1363 1364 static void hci_power_transition_to_initializing(void){ 1365 // set up state machine 1366 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1367 hci_stack->hci_packet_buffer_reserved = 0; 1368 hci_stack->state = HCI_STATE_INITIALIZING; 1369 hci_stack->substate = 0; 1370 } 1371 1372 int hci_power_control(HCI_POWER_MODE power_mode){ 1373 1374 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack->state); 1375 1376 int err = 0; 1377 switch (hci_stack->state){ 1378 1379 case HCI_STATE_OFF: 1380 switch (power_mode){ 1381 case HCI_POWER_ON: 1382 err = hci_power_control_on(); 1383 if (err) { 1384 log_error("hci_power_control_on() error %u", err); 1385 return err; 1386 } 1387 hci_power_transition_to_initializing(); 1388 break; 1389 case HCI_POWER_OFF: 1390 // do nothing 1391 break; 1392 case HCI_POWER_SLEEP: 1393 // do nothing (with SLEEP == OFF) 1394 break; 1395 } 1396 break; 1397 1398 case HCI_STATE_INITIALIZING: 1399 switch (power_mode){ 1400 case HCI_POWER_ON: 1401 // do nothing 1402 break; 1403 case HCI_POWER_OFF: 1404 // no connections yet, just turn it off 1405 hci_power_control_off(); 1406 break; 1407 case HCI_POWER_SLEEP: 1408 // no connections yet, just turn it off 1409 hci_power_control_sleep(); 1410 break; 1411 } 1412 break; 1413 1414 case HCI_STATE_WORKING: 1415 switch (power_mode){ 1416 case HCI_POWER_ON: 1417 // do nothing 1418 break; 1419 case HCI_POWER_OFF: 1420 // see hci_run 1421 hci_stack->state = HCI_STATE_HALTING; 1422 break; 1423 case HCI_POWER_SLEEP: 1424 // see hci_run 1425 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1426 hci_stack->substate = 0; 1427 break; 1428 } 1429 break; 1430 1431 case HCI_STATE_HALTING: 1432 switch (power_mode){ 1433 case HCI_POWER_ON: 1434 hci_power_transition_to_initializing(); 1435 break; 1436 case HCI_POWER_OFF: 1437 // do nothing 1438 break; 1439 case HCI_POWER_SLEEP: 1440 // see hci_run 1441 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1442 hci_stack->substate = 0; 1443 break; 1444 } 1445 break; 1446 1447 case HCI_STATE_FALLING_ASLEEP: 1448 switch (power_mode){ 1449 case HCI_POWER_ON: 1450 1451 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1452 // nothing to do, if H4 supports power management 1453 if (bt_control_iphone_power_management_enabled()){ 1454 hci_stack->state = HCI_STATE_INITIALIZING; 1455 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1456 break; 1457 } 1458 #endif 1459 hci_power_transition_to_initializing(); 1460 break; 1461 case HCI_POWER_OFF: 1462 // see hci_run 1463 hci_stack->state = HCI_STATE_HALTING; 1464 break; 1465 case HCI_POWER_SLEEP: 1466 // do nothing 1467 break; 1468 } 1469 break; 1470 1471 case HCI_STATE_SLEEPING: 1472 switch (power_mode){ 1473 case HCI_POWER_ON: 1474 1475 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1476 // nothing to do, if H4 supports power management 1477 if (bt_control_iphone_power_management_enabled()){ 1478 hci_stack->state = HCI_STATE_INITIALIZING; 1479 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1480 hci_update_scan_enable(); 1481 break; 1482 } 1483 #endif 1484 err = hci_power_control_wake(); 1485 if (err) return err; 1486 hci_power_transition_to_initializing(); 1487 break; 1488 case HCI_POWER_OFF: 1489 hci_stack->state = HCI_STATE_HALTING; 1490 break; 1491 case HCI_POWER_SLEEP: 1492 // do nothing 1493 break; 1494 } 1495 break; 1496 } 1497 1498 // create internal event 1499 hci_emit_state(); 1500 1501 // trigger next/first action 1502 hci_run(); 1503 1504 return 0; 1505 } 1506 1507 static void hci_update_scan_enable(void){ 1508 // 2 = page scan, 1 = inq scan 1509 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 1510 hci_run(); 1511 } 1512 1513 void hci_discoverable_control(uint8_t enable){ 1514 if (enable) enable = 1; // normalize argument 1515 1516 if (hci_stack->discoverable == enable){ 1517 hci_emit_discoverable_enabled(hci_stack->discoverable); 1518 return; 1519 } 1520 1521 hci_stack->discoverable = enable; 1522 hci_update_scan_enable(); 1523 } 1524 1525 void hci_connectable_control(uint8_t enable){ 1526 if (enable) enable = 1; // normalize argument 1527 1528 // don't emit event 1529 if (hci_stack->connectable == enable) return; 1530 1531 hci_stack->connectable = enable; 1532 hci_update_scan_enable(); 1533 } 1534 1535 bd_addr_t * hci_local_bd_addr(void){ 1536 return &hci_stack->local_bd_addr; 1537 } 1538 1539 void hci_run(){ 1540 1541 hci_connection_t * connection; 1542 linked_item_t * it; 1543 1544 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1545 1546 // global/non-connection oriented commands 1547 1548 // decline incoming connections 1549 if (hci_stack->decline_reason){ 1550 uint8_t reason = hci_stack->decline_reason; 1551 hci_stack->decline_reason = 0; 1552 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 1553 return; 1554 } 1555 1556 // send scan enable 1557 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 1558 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1559 hci_stack->new_scan_enable_value = 0xff; 1560 return; 1561 } 1562 1563 #ifdef HAVE_BLE 1564 // handle le scan 1565 if (hci_stack->state == HCI_STATE_WORKING){ 1566 switch(hci_stack->le_scanning_state){ 1567 case LE_START_SCAN: 1568 hci_stack->le_scanning_state = LE_SCANNING; 1569 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 1570 return; 1571 1572 case LE_STOP_SCAN: 1573 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1574 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 1575 return; 1576 default: 1577 break; 1578 } 1579 if (hci_stack->le_scan_type != 0xff){ 1580 // defaults: active scanning, accept all advertisement packets 1581 int scan_type = hci_stack->le_scan_type; 1582 hci_stack->le_scan_type = 0xff; 1583 hci_send_cmd(&hci_le_set_scan_parameters, scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->adv_addr_type, 0); 1584 return; 1585 } 1586 } 1587 #endif 1588 1589 // send pending HCI commands 1590 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 1591 connection = (hci_connection_t *) it; 1592 1593 switch(connection->state){ 1594 case SEND_CREATE_CONNECTION: 1595 switch(connection->address_type){ 1596 case BD_ADDR_TYPE_CLASSIC: 1597 log_info("sending hci_create_connection\n"); 1598 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 1599 break; 1600 default: 1601 #ifdef HAVE_BLE 1602 log_info("sending hci_le_create_connection\n"); 1603 hci_send_cmd(&hci_le_create_connection, 1604 0x0060, // scan interval: 60 ms 1605 0x0030, // scan interval: 30 ms 1606 0, // don't use whitelist 1607 connection->address_type, // peer address type 1608 connection->address, // peer bd addr 1609 hci_stack->adv_addr_type, // our addr type: 1610 0x0008, // conn interval min 1611 0x0018, // conn interval max 1612 0, // conn latency 1613 0x0048, // supervision timeout 1614 0x0001, // min ce length 1615 0x0001 // max ce length 1616 ); 1617 1618 connection->state = SENT_CREATE_CONNECTION; 1619 #endif 1620 break; 1621 } 1622 return; 1623 1624 case RECEIVED_CONNECTION_REQUEST: 1625 log_info("sending hci_accept_connection_request\n"); 1626 connection->state = ACCEPTED_CONNECTION_REQUEST; 1627 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1628 return; 1629 1630 #ifdef HAVE_BLE 1631 case SEND_CANCEL_CONNECTION: 1632 connection->state = SENT_CANCEL_CONNECTION; 1633 hci_send_cmd(&hci_le_create_connection_cancel); 1634 return; 1635 #endif 1636 case SEND_DISCONNECT: 1637 connection->state = SENT_DISCONNECT; 1638 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1639 return; 1640 1641 default: 1642 break; 1643 } 1644 1645 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1646 log_info("responding to link key request\n"); 1647 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1648 link_key_t link_key; 1649 link_key_type_t link_key_type; 1650 if ( hci_stack->remote_device_db 1651 && hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type) 1652 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 1653 connection->link_key_type = link_key_type; 1654 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1655 } else { 1656 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1657 } 1658 return; 1659 } 1660 1661 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 1662 log_info("denying to pin request\n"); 1663 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 1664 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 1665 return; 1666 } 1667 1668 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1669 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1670 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 1671 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 1672 // tweak authentication requirements 1673 uint8_t authreq = hci_stack->ssp_authentication_requirement; 1674 if (connection->bonding_flags & BONDING_DEDICATED){ 1675 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 1676 } 1677 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 1678 authreq |= 1; 1679 } 1680 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 1681 } else { 1682 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 1683 } 1684 return; 1685 } 1686 1687 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1688 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1689 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1690 return; 1691 } 1692 1693 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1694 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1695 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1696 return; 1697 } 1698 1699 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 1700 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 1701 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 1702 return; 1703 } 1704 1705 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 1706 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 1707 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 1708 return; 1709 } 1710 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 1711 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 1712 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 1713 return; 1714 } 1715 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 1716 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 1717 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 1718 return; 1719 } 1720 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 1721 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 1722 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 1723 return; 1724 } 1725 } 1726 1727 switch (hci_stack->state){ 1728 case HCI_STATE_INITIALIZING: 1729 hci_initializing_state_machine(); 1730 break; 1731 1732 case HCI_STATE_HALTING: 1733 1734 log_info("HCI_STATE_HALTING\n"); 1735 // close all open connections 1736 connection = (hci_connection_t *) hci_stack->connections; 1737 if (connection){ 1738 1739 // send disconnect 1740 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1741 1742 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1743 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1744 1745 // send disconnected event right away - causes higher layer connections to get closed, too. 1746 hci_shutdown_connection(connection); 1747 return; 1748 } 1749 log_info("HCI_STATE_HALTING, calling off\n"); 1750 1751 // switch mode 1752 hci_power_control_off(); 1753 1754 log_info("HCI_STATE_HALTING, emitting state\n"); 1755 hci_emit_state(); 1756 log_info("HCI_STATE_HALTING, done\n"); 1757 break; 1758 1759 case HCI_STATE_FALLING_ASLEEP: 1760 switch(hci_stack->substate) { 1761 case 0: 1762 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1763 // close all open connections 1764 connection = (hci_connection_t *) hci_stack->connections; 1765 1766 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1767 // don't close connections, if H4 supports power management 1768 if (bt_control_iphone_power_management_enabled()){ 1769 connection = NULL; 1770 } 1771 #endif 1772 if (connection){ 1773 1774 // send disconnect 1775 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1776 1777 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1778 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1779 1780 // send disconnected event right away - causes higher layer connections to get closed, too. 1781 hci_shutdown_connection(connection); 1782 return; 1783 } 1784 1785 if (hci_classic_supported()){ 1786 // disable page and inquiry scan 1787 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1788 1789 log_info("HCI_STATE_HALTING, disabling inq scans\n"); 1790 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 1791 1792 // continue in next sub state 1793 hci_stack->substate++; 1794 break; 1795 } 1796 // fall through for ble-only chips 1797 1798 case 2: 1799 log_info("HCI_STATE_HALTING, calling sleep\n"); 1800 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1801 // don't actually go to sleep, if H4 supports power management 1802 if (bt_control_iphone_power_management_enabled()){ 1803 // SLEEP MODE reached 1804 hci_stack->state = HCI_STATE_SLEEPING; 1805 hci_emit_state(); 1806 break; 1807 } 1808 #endif 1809 // switch mode 1810 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 1811 hci_emit_state(); 1812 break; 1813 1814 default: 1815 break; 1816 } 1817 break; 1818 1819 default: 1820 break; 1821 } 1822 } 1823 1824 int hci_send_cmd_packet(uint8_t *packet, int size){ 1825 bd_addr_t addr; 1826 hci_connection_t * conn; 1827 // house-keeping 1828 1829 // create_connection? 1830 if (IS_COMMAND(packet, hci_create_connection)){ 1831 bt_flip_addr(addr, &packet[3]); 1832 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1833 1834 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1835 if (!conn){ 1836 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1837 if (!conn){ 1838 // notify client that alloc failed 1839 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1840 return 0; // don't sent packet to controller 1841 } 1842 conn->state = SEND_CREATE_CONNECTION; 1843 } 1844 log_info("conn state %u", conn->state); 1845 switch (conn->state){ 1846 // if connection active exists 1847 case OPEN: 1848 // and OPEN, emit connection complete command, don't send to controller 1849 hci_emit_connection_complete(conn, 0); 1850 return 0; 1851 case SEND_CREATE_CONNECTION: 1852 // connection created by hci, e.g. dedicated bonding 1853 break; 1854 default: 1855 // otherwise, just ignore as it is already in the open process 1856 return 0; 1857 } 1858 conn->state = SENT_CREATE_CONNECTION; 1859 } 1860 1861 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1862 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1863 } 1864 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1865 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1866 } 1867 1868 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1869 if (hci_stack->remote_device_db){ 1870 bt_flip_addr(addr, &packet[3]); 1871 hci_stack->remote_device_db->delete_link_key(&addr); 1872 } 1873 } 1874 1875 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 1876 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 1877 bt_flip_addr(addr, &packet[3]); 1878 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1879 if (conn){ 1880 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 1881 } 1882 } 1883 1884 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 1885 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 1886 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 1887 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 1888 bt_flip_addr(addr, &packet[3]); 1889 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1890 if (conn){ 1891 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 1892 } 1893 } 1894 1895 #ifdef HAVE_BLE 1896 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 1897 hci_stack->adv_addr_type = packet[8]; 1898 } 1899 if (IS_COMMAND(packet, hci_le_set_random_address)){ 1900 bt_flip_addr(hci_stack->adv_address, &packet[3]); 1901 } 1902 #endif 1903 1904 hci_stack->num_cmd_packets--; 1905 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1906 1907 // free packet buffer for synchronous transport implementations 1908 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 1909 hci_stack->hci_packet_buffer_reserved = 0; 1910 } 1911 1912 return err; 1913 } 1914 1915 // disconnect because of security block 1916 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 1917 hci_connection_t * connection = hci_connection_for_handle(con_handle); 1918 if (!connection) return; 1919 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 1920 } 1921 1922 1923 // Configure Secure Simple Pairing 1924 1925 // enable will enable SSP during init 1926 void hci_ssp_set_enable(int enable){ 1927 hci_stack->ssp_enable = enable; 1928 } 1929 1930 int hci_local_ssp_activated(){ 1931 return hci_ssp_supported() && hci_stack->ssp_enable; 1932 } 1933 1934 // if set, BTstack will respond to io capability request using authentication requirement 1935 void hci_ssp_set_io_capability(int io_capability){ 1936 hci_stack->ssp_io_capability = io_capability; 1937 } 1938 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 1939 hci_stack->ssp_authentication_requirement = authentication_requirement; 1940 } 1941 1942 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 1943 void hci_ssp_set_auto_accept(int auto_accept){ 1944 hci_stack->ssp_auto_accept = auto_accept; 1945 } 1946 1947 /** 1948 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1949 */ 1950 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1951 1952 // for HCI INITIALIZATION 1953 // printf("hci_send_cmd: opcode %04x\n", cmd->opcode); 1954 hci_stack->last_cmd_opcode = cmd->opcode; 1955 1956 va_list argptr; 1957 va_start(argptr, cmd); 1958 uint16_t size = hci_create_cmd_internal(hci_stack->hci_packet_buffer, cmd, argptr); 1959 va_end(argptr); 1960 return hci_send_cmd_packet(hci_stack->hci_packet_buffer, size); 1961 } 1962 1963 // Create various non-HCI events. 1964 // TODO: generalize, use table similar to hci_create_command 1965 1966 void hci_emit_state(){ 1967 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 1968 uint8_t event[3]; 1969 event[0] = BTSTACK_EVENT_STATE; 1970 event[1] = sizeof(event) - 2; 1971 event[2] = hci_stack->state; 1972 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1973 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1974 } 1975 1976 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1977 uint8_t event[13]; 1978 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1979 event[1] = sizeof(event) - 2; 1980 event[2] = status; 1981 bt_store_16(event, 3, conn->con_handle); 1982 bt_flip_addr(&event[5], conn->address); 1983 event[11] = 1; // ACL connection 1984 event[12] = 0; // encryption disabled 1985 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1986 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1987 } 1988 1989 void hci_emit_le_connection_complete(hci_connection_t *conn, uint8_t status){ 1990 uint8_t event[21]; 1991 event[0] = HCI_EVENT_LE_META; 1992 event[1] = sizeof(event) - 2; 1993 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 1994 event[3] = status; 1995 bt_store_16(event, 4, conn->con_handle); 1996 event[6] = 0; // TODO: role 1997 event[7] = conn->address_type; 1998 bt_flip_addr(&event[8], conn->address); 1999 bt_store_16(event, 14, 0); // interval 2000 bt_store_16(event, 16, 0); // latency 2001 bt_store_16(event, 18, 0); // supervision timeout 2002 event[20] = 0; // master clock accuracy 2003 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2004 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2005 } 2006 2007 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 2008 uint8_t event[6]; 2009 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 2010 event[1] = sizeof(event) - 2; 2011 event[2] = 0; // status = OK 2012 bt_store_16(event, 3, handle); 2013 event[5] = reason; 2014 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2015 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2016 } 2017 2018 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 2019 if (disable_l2cap_timeouts) return; 2020 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 2021 uint8_t event[4]; 2022 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 2023 event[1] = sizeof(event) - 2; 2024 bt_store_16(event, 2, conn->con_handle); 2025 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2026 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2027 } 2028 2029 void hci_emit_nr_connections_changed(){ 2030 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 2031 uint8_t event[3]; 2032 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 2033 event[1] = sizeof(event) - 2; 2034 event[2] = nr_hci_connections(); 2035 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2036 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2037 } 2038 2039 void hci_emit_hci_open_failed(){ 2040 log_info("BTSTACK_EVENT_POWERON_FAILED"); 2041 uint8_t event[2]; 2042 event[0] = BTSTACK_EVENT_POWERON_FAILED; 2043 event[1] = sizeof(event) - 2; 2044 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2045 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2046 } 2047 2048 #ifndef EMBEDDED 2049 void hci_emit_btstack_version() { 2050 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 2051 uint8_t event[6]; 2052 event[0] = BTSTACK_EVENT_VERSION; 2053 event[1] = sizeof(event) - 2; 2054 event[2] = BTSTACK_MAJOR; 2055 event[3] = BTSTACK_MINOR; 2056 bt_store_16(event, 4, BTSTACK_REVISION); 2057 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2058 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2059 } 2060 #endif 2061 2062 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 2063 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 2064 uint8_t event[3]; 2065 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 2066 event[1] = sizeof(event) - 2; 2067 event[2] = enabled; 2068 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2069 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2070 } 2071 2072 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 2073 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 2074 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 2075 event[1] = sizeof(event) - 2 - 1; 2076 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 2077 bt_flip_addr(&event[3], *addr); 2078 memcpy(&event[9], name, 248); 2079 2080 event[9+248] = 0; // assert \0 for log_info 2081 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 2082 2083 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 2084 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 2085 } 2086 2087 void hci_emit_discoverable_enabled(uint8_t enabled){ 2088 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 2089 uint8_t event[3]; 2090 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 2091 event[1] = sizeof(event) - 2; 2092 event[2] = enabled; 2093 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2094 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2095 } 2096 2097 void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 2098 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 2099 uint8_t event[5]; 2100 int pos = 0; 2101 event[pos++] = GAP_SECURITY_LEVEL; 2102 event[pos++] = sizeof(event) - 2; 2103 bt_store_16(event, 2, con_handle); 2104 pos += 2; 2105 event[pos++] = level; 2106 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2107 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2108 } 2109 2110 void hci_emit_dedicated_bonding_result(hci_connection_t * connection, uint8_t status){ 2111 log_info("hci_emit_dedicated_bonding_result %u ", status); 2112 uint8_t event[9]; 2113 int pos = 0; 2114 event[pos++] = GAP_DEDICATED_BONDING_COMPLETED; 2115 event[pos++] = sizeof(event) - 2; 2116 event[pos++] = status; 2117 bt_flip_addr( * (bd_addr_t *) &event[pos], connection->address); 2118 pos += 6; 2119 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2120 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2121 } 2122 2123 // query if remote side supports SSP 2124 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 2125 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2126 if (!connection) return 0; 2127 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 2128 } 2129 2130 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 2131 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 2132 } 2133 2134 // GAP API 2135 /** 2136 * @bbrief enable/disable bonding. default is enabled 2137 * @praram enabled 2138 */ 2139 void gap_set_bondable_mode(int enable){ 2140 hci_stack->bondable = enable ? 1 : 0; 2141 } 2142 2143 /** 2144 * @brief map link keys to security levels 2145 */ 2146 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 2147 switch (link_key_type){ 2148 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 2149 return LEVEL_4; 2150 case COMBINATION_KEY: 2151 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 2152 return LEVEL_3; 2153 default: 2154 return LEVEL_2; 2155 } 2156 } 2157 2158 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 2159 if (!connection) return LEVEL_0; 2160 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 2161 return gap_security_level_for_link_key_type(connection->link_key_type); 2162 } 2163 2164 2165 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 2166 log_info("gap_mitm_protection_required_for_security_level %u", level); 2167 return level > LEVEL_2; 2168 } 2169 2170 /** 2171 * @brief get current security level 2172 */ 2173 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 2174 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2175 if (!connection) return LEVEL_0; 2176 return gap_security_level_for_connection(connection); 2177 } 2178 2179 /** 2180 * @brief request connection to device to 2181 * @result GAP_AUTHENTICATION_RESULT 2182 */ 2183 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 2184 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2185 if (!connection){ 2186 hci_emit_security_level(con_handle, LEVEL_0); 2187 return; 2188 } 2189 gap_security_level_t current_level = gap_security_level(con_handle); 2190 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 2191 if (current_level >= requested_level){ 2192 hci_emit_security_level(con_handle, current_level); 2193 return; 2194 } 2195 2196 connection->requested_security_level = requested_level; 2197 2198 // would enabling ecnryption suffice (>= LEVEL_2)? 2199 if (hci_stack->remote_device_db){ 2200 link_key_type_t link_key_type; 2201 link_key_t link_key; 2202 if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 2203 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 2204 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2205 return; 2206 } 2207 } 2208 } 2209 2210 // try to authenticate connection 2211 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2212 hci_run(); 2213 } 2214 2215 /** 2216 * @brief start dedicated bonding with device. disconnect after bonding 2217 * @param device 2218 * @param request MITM protection 2219 * @result GAP_DEDICATED_BONDING_COMPLETE 2220 */ 2221 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 2222 2223 // create connection state machine 2224 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 2225 2226 if (!connection){ 2227 return BTSTACK_MEMORY_ALLOC_FAILED; 2228 } 2229 2230 // delete linkn key 2231 hci_drop_link_key_for_bd_addr( (bd_addr_t *) &device); 2232 2233 // configure LEVEL_2/3, dedicated bonding 2234 connection->state = SEND_CREATE_CONNECTION; 2235 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 2236 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 2237 connection->bonding_flags = BONDING_DEDICATED; 2238 2239 // wait for GAP Security Result and send GAP Dedicated Bonding complete 2240 2241 // handle: connnection failure (connection complete != ok) 2242 // handle: authentication failure 2243 // handle: disconnect on done 2244 2245 hci_run(); 2246 2247 return 0; 2248 } 2249 2250 void gap_set_local_name(const char * local_name){ 2251 hci_stack->local_name = local_name; 2252 } 2253 2254 le_command_status_t le_central_start_scan(){ 2255 if (hci_stack->le_scanning_state == LE_SCANNING) return BLE_PERIPHERAL_OK; 2256 hci_stack->le_scanning_state = LE_START_SCAN; 2257 hci_run(); 2258 return BLE_PERIPHERAL_OK; 2259 } 2260 2261 le_command_status_t le_central_stop_scan(){ 2262 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return BLE_PERIPHERAL_OK; 2263 hci_stack->le_scanning_state = LE_STOP_SCAN; 2264 hci_run(); 2265 return BLE_PERIPHERAL_OK; 2266 } 2267 2268 void le_central_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 2269 hci_stack->le_scan_type = scan_type; 2270 hci_stack->le_scan_interval = scan_interval; 2271 hci_stack->le_scan_window = scan_window; 2272 hci_run(); 2273 } 2274 2275 le_command_status_t le_central_connect(bd_addr_t * addr, bd_addr_type_t addr_type){ 2276 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2277 if (!conn){ 2278 log_info("le_central_connect: no connection exists yet, creating context"); 2279 conn = create_connection_for_bd_addr_and_type(*addr, addr_type); 2280 if (!conn){ 2281 // notify client that alloc failed 2282 hci_emit_le_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2283 log_info("le_central_connect: failed to alloc context"); 2284 return BLE_PERIPHERAL_NOT_CONNECTED; // don't sent packet to controller 2285 } 2286 conn->state = SEND_CREATE_CONNECTION; 2287 log_info("le_central_connect: send create connection next"); 2288 hci_run(); 2289 return BLE_PERIPHERAL_OK; 2290 } 2291 2292 if (!hci_is_le_connection(conn) || 2293 conn->state == SEND_CREATE_CONNECTION || 2294 conn->state == SENT_CREATE_CONNECTION) { 2295 hci_emit_le_connection_complete(conn, ERROR_CODE_COMMAND_DISALLOWED); 2296 log_error("le_central_connect: classic connection or connect is already being created"); 2297 return BLE_PERIPHERAL_IN_WRONG_STATE; 2298 } 2299 2300 log_info("le_central_connect: context exists with state %u", conn->state); 2301 hci_emit_le_connection_complete(conn, 0); 2302 hci_run(); 2303 return BLE_PERIPHERAL_OK; 2304 } 2305 2306 // @assumption: only a single outgoing LE Connection exists 2307 static hci_connection_t * le_central_get_outgoing_connection(){ 2308 linked_item_t *it; 2309 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 2310 hci_connection_t * conn = (hci_connection_t *) it; 2311 if (!hci_is_le_connection(conn)) continue; 2312 switch (conn->state){ 2313 case SEND_CREATE_CONNECTION: 2314 case SENT_CREATE_CONNECTION: 2315 return conn; 2316 default: 2317 break; 2318 }; 2319 } 2320 return NULL; 2321 } 2322 2323 le_command_status_t le_central_connect_cancel(){ 2324 hci_connection_t * conn = le_central_get_outgoing_connection(); 2325 switch (conn->state){ 2326 case SEND_CREATE_CONNECTION: 2327 // skip sending create connection and emit event instead 2328 hci_emit_le_connection_complete(conn, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 2329 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 2330 btstack_memory_hci_connection_free( conn ); 2331 break; 2332 case SENT_CREATE_CONNECTION: 2333 // request to send cancel connection 2334 conn->state = SEND_CANCEL_CONNECTION; 2335 hci_run(); 2336 break; 2337 default: 2338 break; 2339 } 2340 return BLE_PERIPHERAL_OK; 2341 } 2342 2343 le_command_status_t gap_disconnect(hci_con_handle_t handle){ 2344 hci_connection_t * conn = hci_connection_for_handle(handle); 2345 if (!conn){ 2346 hci_emit_disconnection_complete(handle, 0); 2347 return BLE_PERIPHERAL_OK; 2348 } 2349 conn->state = SEND_DISCONNECT; 2350 hci_run(); 2351 return BLE_PERIPHERAL_OK; 2352 } 2353 2354 void hci_disconnect_all(){ 2355 linked_list_iterator_t it; 2356 linked_list_iterator_init(&it, &hci_stack->connections); 2357 while (linked_list_iterator_has_next(&it)){ 2358 hci_connection_t * con = (hci_connection_t*) linked_list_iterator_next(&it); 2359 if (con->state == SENT_DISCONNECT) continue; 2360 con->state = SEND_DISCONNECT; 2361 } 2362 hci_run(); 2363 } 2364