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 // pre: caller has reserved the packet buffer 306 int hci_send_acl_packet_buffer(int size){ 307 308 if (!hci_stack->hci_packet_buffer_reserved) { 309 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 310 return 0; 311 } 312 313 // check for free places on Bluetooth module 314 if (!hci_number_free_acl_slots()) { 315 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 316 hci_release_packet_buffer(); 317 return BTSTACK_ACL_BUFFERS_FULL; 318 } 319 320 uint8_t * packet = hci_stack->hci_packet_buffer; 321 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 322 hci_connection_t *connection = hci_connection_for_handle( con_handle); 323 if (!connection) { 324 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x"); 325 hci_release_packet_buffer(); 326 return 0; 327 } 328 hci_connection_timestamp(connection); 329 330 // count packet 331 connection->num_acl_packets_sent++; 332 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 333 334 // send packet 335 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 336 337 // free packet buffer for synchronous transport implementations 338 if (hci_transport_synchronous()){ 339 hci_release_packet_buffer(); 340 } 341 342 return err; 343 } 344 345 static void acl_handler(uint8_t *packet, int size){ 346 347 // log_info("acl_handler: size %u", size); 348 349 // get info 350 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 351 hci_connection_t *conn = hci_connection_for_handle(con_handle); 352 uint8_t acl_flags = READ_ACL_FLAGS(packet); 353 uint16_t acl_length = READ_ACL_LENGTH(packet); 354 355 // ignore non-registered handle 356 if (!conn){ 357 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 358 return; 359 } 360 361 // assert packet is complete 362 if (acl_length + 4 != size){ 363 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 364 return; 365 } 366 367 // update idle timestamp 368 hci_connection_timestamp(conn); 369 370 // handle different packet types 371 switch (acl_flags & 0x03) { 372 373 case 0x01: // continuation fragment 374 375 // sanity check 376 if (conn->acl_recombination_pos == 0) { 377 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 378 return; 379 } 380 381 // append fragment payload (header already stored) 382 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 383 conn->acl_recombination_pos += acl_length; 384 385 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 386 // conn->acl_recombination_pos, conn->acl_recombination_length); 387 388 // forward complete L2CAP packet if complete. 389 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 390 391 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 392 // reset recombination buffer 393 conn->acl_recombination_length = 0; 394 conn->acl_recombination_pos = 0; 395 } 396 break; 397 398 case 0x02: { // first fragment 399 400 // sanity check 401 if (conn->acl_recombination_pos) { 402 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 403 return; 404 } 405 406 // peek into L2CAP packet! 407 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 408 409 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 410 411 // compare fragment size to L2CAP packet size 412 if (acl_length >= l2cap_length + 4){ 413 414 // forward fragment as L2CAP packet 415 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 416 417 } else { 418 // store first fragment and tweak acl length for complete package 419 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 420 conn->acl_recombination_pos = acl_length + 4; 421 conn->acl_recombination_length = l2cap_length; 422 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 423 } 424 break; 425 426 } 427 default: 428 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 429 return; 430 } 431 432 // execute main loop 433 hci_run(); 434 } 435 436 static void hci_shutdown_connection(hci_connection_t *conn){ 437 log_info("Connection closed: handle 0x%x, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 438 439 run_loop_remove_timer(&conn->timeout); 440 441 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 442 btstack_memory_hci_connection_free( conn ); 443 444 // now it's gone 445 hci_emit_nr_connections_changed(); 446 } 447 448 static const uint16_t packet_type_sizes[] = { 449 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 450 HCI_ACL_DH1_SIZE, 0, 0, 0, 451 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 452 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 453 }; 454 static const uint8_t packet_type_feature_requirement_bit[] = { 455 0, // 3 slot packets 456 1, // 5 slot packets 457 25, // EDR 2 mpbs 458 26, // EDR 3 mbps 459 39, // 3 slot EDR packts 460 40, // 5 slot EDR packet 461 }; 462 static const uint16_t packet_type_feature_packet_mask[] = { 463 0x0f00, // 3 slot packets 464 0xf000, // 5 slot packets 465 0x1102, // EDR 2 mpbs 466 0x2204, // EDR 3 mbps 467 0x0300, // 3 slot EDR packts 468 0x3000, // 5 slot EDR packet 469 }; 470 471 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 472 // enable packet types based on size 473 uint16_t packet_types = 0; 474 int i; 475 for (i=0;i<16;i++){ 476 if (packet_type_sizes[i] == 0) continue; 477 if (packet_type_sizes[i] <= buffer_size){ 478 packet_types |= 1 << i; 479 } 480 } 481 // disable packet types due to missing local supported features 482 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 483 int bit_idx = packet_type_feature_requirement_bit[i]; 484 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 485 if (feature_set) continue; 486 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 487 packet_types &= ~packet_type_feature_packet_mask[i]; 488 } 489 // flip bits for "may not be used" 490 packet_types ^= 0x3306; 491 return packet_types; 492 } 493 494 uint16_t hci_usable_acl_packet_types(void){ 495 return hci_stack->packet_types; 496 } 497 498 uint8_t* hci_get_outgoing_packet_buffer(void){ 499 // hci packet buffer is >= acl data packet length 500 return hci_stack->hci_packet_buffer; 501 } 502 503 uint16_t hci_max_acl_data_packet_length(void){ 504 return hci_stack->acl_data_packet_length; 505 } 506 507 int hci_non_flushable_packet_boundary_flag_supported(void){ 508 // No. 54, byte 6, bit 6 509 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 510 } 511 512 int hci_ssp_supported(void){ 513 // No. 51, byte 6, bit 3 514 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 515 } 516 517 int hci_classic_supported(void){ 518 // No. 37, byte 4, bit 5, = No BR/EDR Support 519 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 520 } 521 522 int hci_le_supported(void){ 523 #ifdef HAVE_BLE 524 // No. 37, byte 4, bit 6 = LE Supported (Controller) 525 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 526 #else 527 return 0; 528 #endif 529 } 530 531 // get addr type and address used in advertisement packets 532 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t * addr){ 533 *addr_type = hci_stack->adv_addr_type; 534 if (hci_stack->adv_addr_type){ 535 memcpy(addr, hci_stack->adv_address, 6); 536 } else { 537 memcpy(addr, hci_stack->local_bd_addr, 6); 538 } 539 } 540 541 #ifdef HAVE_BLE 542 void le_handle_advertisement_report(uint8_t *packet, int size){ 543 int num_reports = packet[3]; 544 int i; 545 int total_data_length = 0; 546 int data_offset = 0; 547 548 for (i=0; i<num_reports;i++){ 549 total_data_length += packet[4+num_reports*8+i]; 550 } 551 552 for (i=0; i<num_reports;i++){ 553 int pos = 0; 554 uint8_t data_length = packet[4+num_reports*8+i]; 555 uint8_t event_size = 10 + data_length; 556 uint8_t event[2 + event_size ]; 557 event[pos++] = GAP_LE_ADVERTISING_REPORT; 558 event[pos++] = event_size; 559 event[pos++] = packet[4+i]; // event_type; 560 event[pos++] = packet[4+num_reports+i]; // address_type; 561 memcpy(&event[pos], &packet[4+num_reports*2+i*6], 6); // bt address 562 pos += 6; 563 event[pos++] = packet[4+num_reports*9+total_data_length + i]; 564 event[pos++] = data_length; 565 memcpy(&event[pos], &packet[4+num_reports*9+data_offset], data_length); 566 data_offset += data_length; 567 pos += data_length; 568 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 569 } 570 } 571 #endif 572 573 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 574 uint8_t command_completed = 0; 575 if ((hci_stack->substate % 2) == 0) return; 576 // odd: waiting for event 577 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 578 uint16_t opcode = READ_BT_16(packet,3); 579 if (opcode == hci_stack->last_cmd_opcode){ 580 command_completed = 1; 581 log_info("Command complete for expected opcode %04x -> new substate %u", opcode, hci_stack->substate); 582 } else { 583 log_info("Command complete for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 584 } 585 } 586 if (packet[0] == HCI_EVENT_COMMAND_STATUS){ 587 uint8_t status = packet[2]; 588 uint16_t opcode = READ_BT_16(packet,4); 589 if (opcode == hci_stack->last_cmd_opcode){ 590 if (status){ 591 command_completed = 1; 592 log_error("Command status error 0x%02x for expected opcode %04x -> new substate %u", status, opcode, hci_stack->substate); 593 } else { 594 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 595 } 596 } else { 597 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 598 } 599 } 600 601 if (!command_completed) return; 602 603 switch(hci_stack->substate >> 1){ 604 default: 605 hci_stack->substate++; 606 break; 607 } 608 } 609 610 static void hci_initializing_state_machine(){ 611 // log_info("hci_init: substate %u\n", hci_stack->substate); 612 if (hci_stack->substate % 2) { 613 // odd: waiting for command completion 614 return; 615 } 616 switch (hci_stack->substate >> 1){ 617 case 0: // RESET 618 hci_state_reset(); 619 620 hci_send_cmd(&hci_reset); 621 if (hci_stack->config == NULL || ((hci_uart_config_t *)hci_stack->config)->baudrate_main == 0){ 622 // skip baud change 623 hci_stack->substate = 4; // >> 1 = 2 624 } 625 break; 626 case 1: // SEND BAUD CHANGE 627 hci_stack->control->baudrate_cmd(hci_stack->config, ((hci_uart_config_t *)hci_stack->config)->baudrate_main, hci_stack->hci_packet_buffer); 628 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 629 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 630 break; 631 case 2: // LOCAL BAUD CHANGE 632 log_info("Local baud rate change"); 633 hci_stack->hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack->config)->baudrate_main); 634 hci_stack->substate += 2; 635 // break missing here for fall through 636 637 case 3: 638 log_info("Custom init"); 639 // Custom initialization 640 if (hci_stack->control && hci_stack->control->next_cmd){ 641 int valid_cmd = (*hci_stack->control->next_cmd)(hci_stack->config, hci_stack->hci_packet_buffer); 642 if (valid_cmd){ 643 int size = 3 + hci_stack->hci_packet_buffer[2]; 644 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 645 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 646 hci_stack->substate = 4; // more init commands 647 break; 648 } 649 log_info("hci_run: init script done\n\r"); 650 } 651 // otherwise continue 652 hci_send_cmd(&hci_read_bd_addr); 653 break; 654 case 4: 655 hci_send_cmd(&hci_read_buffer_size); 656 break; 657 case 5: 658 hci_send_cmd(&hci_read_local_supported_features); 659 break; 660 case 6: 661 if (hci_le_supported()){ 662 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 663 } else { 664 // Kensington Bluetoot 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 665 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 666 } 667 668 // skip Classic init commands for LE only chipsets 669 if (!hci_classic_supported()){ 670 if (hci_le_supported()){ 671 hci_stack->substate = 11 << 1; // skip all classic command 672 } else { 673 log_error("Neither BR/EDR nor LE supported"); 674 hci_stack->substate = 14 << 1; // skip all 675 } 676 } 677 break; 678 case 7: 679 if (hci_ssp_supported()){ 680 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 681 break; 682 } 683 hci_stack->substate += 2; 684 // break missing here for fall through 685 686 case 8: 687 // ca. 15 sec 688 hci_send_cmd(&hci_write_page_timeout, 0x6000); 689 break; 690 case 9: 691 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 692 break; 693 case 10: 694 if (hci_stack->local_name){ 695 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 696 } else { 697 char hostname[30]; 698 #ifdef EMBEDDED 699 // BTstack-11:22:33:44:55:66 700 strcpy(hostname, "BTstack "); 701 strcat(hostname, bd_addr_to_str(hci_stack->local_bd_addr)); 702 log_info("---> Name %s", hostname); 703 #else 704 // hostname for POSIX systems 705 gethostname(hostname, 30); 706 hostname[29] = '\0'; 707 #endif 708 hci_send_cmd(&hci_write_local_name, hostname); 709 } 710 break; 711 case 11: 712 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 713 if (!hci_le_supported()){ 714 // SKIP LE init for Classic only configuration 715 hci_stack->substate = 14 << 1; 716 } 717 break; 718 719 #ifdef HAVE_BLE 720 // LE INIT 721 case 12: 722 hci_send_cmd(&hci_le_read_buffer_size); 723 break; 724 case 13: 725 // LE Supported Host = 1, Simultaneous Host = 0 726 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 727 break; 728 case 14: 729 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 730 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 731 break; 732 #endif 733 734 // DONE 735 case 15: 736 // done. 737 hci_stack->state = HCI_STATE_WORKING; 738 hci_emit_state(); 739 break; 740 default: 741 break; 742 } 743 hci_stack->substate++; 744 } 745 746 // avoid huge local variables 747 #ifndef EMBEDDED 748 static device_name_t device_name; 749 #endif 750 static void event_handler(uint8_t *packet, int size){ 751 752 uint16_t event_length = packet[1]; 753 754 // assert packet is complete 755 if (size != event_length + 2){ 756 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 757 return; 758 } 759 760 bd_addr_t addr; 761 bd_addr_type_t addr_type; 762 uint8_t link_type; 763 hci_con_handle_t handle; 764 hci_connection_t * conn; 765 int i; 766 767 // printf("HCI:EVENT:%02x\n", packet[0]); 768 769 switch (packet[0]) { 770 771 case HCI_EVENT_COMMAND_COMPLETE: 772 // get num cmd packets 773 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack->num_cmd_packets, packet[2]); 774 hci_stack->num_cmd_packets = packet[2]; 775 776 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 777 // from offset 5 778 // status 779 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 780 hci_stack->acl_data_packet_length = READ_BT_16(packet, 6); 781 // ignore: SCO data packet len (8) 782 hci_stack->total_num_acl_packets = packet[9]; 783 // ignore: total num SCO packets 784 if (hci_stack->state == HCI_STATE_INITIALIZING){ 785 // determine usable ACL payload size 786 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 787 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 788 } 789 log_info("hci_read_buffer_size: used size %u, count %u\n", 790 hci_stack->acl_data_packet_length, hci_stack->total_num_acl_packets); 791 } 792 } 793 #ifdef HAVE_BLE 794 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 795 hci_stack->le_data_packet_length = READ_BT_16(packet, 6); 796 hci_stack->total_num_le_packets = packet[8]; 797 log_info("hci_le_read_buffer_size: size %u, count %u\n", hci_stack->le_data_packet_length, hci_stack->total_num_le_packets); 798 799 // use LE buffers if no clasic buffers have been reported 800 if (hci_stack->total_num_acl_packets == 0){ 801 log_info("use le buffers instead of classic ones"); 802 hci_stack->total_num_acl_packets = hci_stack->total_num_le_packets; 803 hci_stack->acl_data_packet_length = hci_stack->le_data_packet_length; 804 // determine usable ACL payload size 805 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 806 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 807 } 808 } 809 } 810 #endif 811 // Dump local address 812 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 813 bt_flip_addr(hci_stack->local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 814 log_info("Local Address, Status: 0x%02x: Addr: %s\n", 815 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 816 } 817 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 818 hci_emit_discoverable_enabled(hci_stack->discoverable); 819 } 820 // Note: HCI init checks 821 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 822 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 823 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 824 hci_stack->local_supported_features[0], hci_stack->local_supported_features[1], 825 hci_stack->local_supported_features[2], hci_stack->local_supported_features[3], 826 hci_stack->local_supported_features[4], hci_stack->local_supported_features[5], 827 hci_stack->local_supported_features[6], hci_stack->local_supported_features[7]); 828 829 // determine usable ACL packet types based buffer size and supported features 830 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]); 831 log_info("packet types %04x", hci_stack->packet_types); 832 833 // Classic/LE 834 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 835 } 836 break; 837 838 case HCI_EVENT_COMMAND_STATUS: 839 // get num cmd packets 840 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack->num_cmd_packets, packet[3]); 841 hci_stack->num_cmd_packets = packet[3]; 842 break; 843 844 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 845 for (i=0; i<packet[2];i++){ 846 handle = READ_BT_16(packet, 3 + 2*i); 847 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 848 conn = hci_connection_for_handle(handle); 849 if (!conn){ 850 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 851 continue; 852 } 853 conn->num_acl_packets_sent -= num_packets; 854 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 855 } 856 break; 857 858 case HCI_EVENT_CONNECTION_REQUEST: 859 bt_flip_addr(addr, &packet[2]); 860 // TODO: eval COD 8-10 861 link_type = packet[11]; 862 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 863 if (link_type == 1) { // ACL 864 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 865 if (!conn) { 866 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 867 } 868 if (!conn) { 869 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 870 hci_stack->decline_reason = 0x0d; 871 BD_ADDR_COPY(hci_stack->decline_addr, addr); 872 break; 873 } 874 conn->state = RECEIVED_CONNECTION_REQUEST; 875 hci_run(); 876 } else { 877 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 878 hci_stack->decline_reason = 0x0a; 879 BD_ADDR_COPY(hci_stack->decline_addr, addr); 880 } 881 break; 882 883 case HCI_EVENT_CONNECTION_COMPLETE: 884 // Connection management 885 bt_flip_addr(addr, &packet[5]); 886 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 887 addr_type = BD_ADDR_TYPE_CLASSIC; 888 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 889 if (conn) { 890 if (!packet[2]){ 891 conn->state = OPEN; 892 conn->con_handle = READ_BT_16(packet, 3); 893 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 894 895 // restart timer 896 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 897 run_loop_add_timer(&conn->timeout); 898 899 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 900 901 hci_emit_nr_connections_changed(); 902 } else { 903 // notify client if dedicated bonding 904 if (conn->bonding_flags & BONDING_DEDICATED){ 905 hci_emit_dedicated_bonding_result(conn, packet[2]); 906 } 907 908 // connection failed, remove entry 909 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 910 btstack_memory_hci_connection_free( conn ); 911 912 // if authentication error, also delete link key 913 if (packet[2] == 0x05) { 914 hci_drop_link_key_for_bd_addr(&addr); 915 } 916 } 917 } 918 break; 919 920 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 921 handle = READ_BT_16(packet, 3); 922 conn = hci_connection_for_handle(handle); 923 if (!conn) break; 924 if (!packet[2]){ 925 uint8_t * features = &packet[5]; 926 if (features[6] & (1 << 3)){ 927 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 928 } 929 } 930 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 931 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x", conn->bonding_flags); 932 if (conn->bonding_flags & BONDING_DEDICATED){ 933 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 934 } 935 break; 936 937 case HCI_EVENT_LINK_KEY_REQUEST: 938 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 939 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 940 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 941 if (hci_stack->bondable && !hci_stack->remote_device_db) break; 942 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 943 hci_run(); 944 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 945 return; 946 947 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 948 bt_flip_addr(addr, &packet[2]); 949 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 950 if (!conn) break; 951 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 952 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 953 // Change Connection Encryption keeps link key type 954 if (link_key_type != CHANGED_COMBINATION_KEY){ 955 conn->link_key_type = link_key_type; 956 } 957 if (!hci_stack->remote_device_db) break; 958 hci_stack->remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8], conn->link_key_type); 959 // still forward event to allow dismiss of pairing dialog 960 break; 961 } 962 963 case HCI_EVENT_PIN_CODE_REQUEST: 964 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 965 // non-bondable mode: pin code negative reply will be sent 966 if (!hci_stack->bondable){ 967 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 968 hci_run(); 969 return; 970 } 971 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 972 if (!hci_stack->remote_device_db) break; 973 bt_flip_addr(addr, &packet[2]); 974 hci_stack->remote_device_db->delete_link_key(&addr); 975 break; 976 977 case HCI_EVENT_IO_CAPABILITY_REQUEST: 978 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 979 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 980 break; 981 982 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 983 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 984 if (!hci_stack->ssp_auto_accept) break; 985 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 986 break; 987 988 case HCI_EVENT_USER_PASSKEY_REQUEST: 989 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 990 if (!hci_stack->ssp_auto_accept) break; 991 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 992 break; 993 994 case HCI_EVENT_ENCRYPTION_CHANGE: 995 handle = READ_BT_16(packet, 3); 996 conn = hci_connection_for_handle(handle); 997 if (!conn) break; 998 if (packet[2] == 0) { 999 if (packet[5]){ 1000 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1001 } else { 1002 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1003 } 1004 } 1005 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1006 break; 1007 1008 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1009 handle = READ_BT_16(packet, 3); 1010 conn = hci_connection_for_handle(handle); 1011 if (!conn) break; 1012 1013 // dedicated bonding: send result and disconnect 1014 if (conn->bonding_flags & BONDING_DEDICATED){ 1015 conn->bonding_flags &= ~BONDING_DEDICATED; 1016 hci_emit_dedicated_bonding_result( conn, packet[2]); 1017 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1018 break; 1019 } 1020 1021 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1022 // link key sufficient for requested security 1023 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1024 break; 1025 } 1026 // not enough 1027 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1028 break; 1029 1030 #ifndef EMBEDDED 1031 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1032 if (!hci_stack->remote_device_db) break; 1033 if (packet[2]) break; // status not ok 1034 bt_flip_addr(addr, &packet[3]); 1035 // fix for invalid remote names - terminate on 0xff 1036 for (i=0; i<248;i++){ 1037 if (packet[9+i] == 0xff){ 1038 packet[9+i] = 0; 1039 break; 1040 } 1041 } 1042 memset(&device_name, 0, sizeof(device_name_t)); 1043 strncpy((char*) device_name, (char*) &packet[9], 248); 1044 hci_stack->remote_device_db->put_name(&addr, &device_name); 1045 break; 1046 1047 case HCI_EVENT_INQUIRY_RESULT: 1048 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 1049 if (!hci_stack->remote_device_db) break; 1050 // first send inq result packet 1051 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1052 // then send cached remote names 1053 for (i=0; i<packet[2];i++){ 1054 bt_flip_addr(addr, &packet[3+i*6]); 1055 if (hci_stack->remote_device_db->get_name(&addr, &device_name)){ 1056 hci_emit_remote_name_cached(&addr, &device_name); 1057 } 1058 } 1059 return; 1060 #endif 1061 1062 case HCI_EVENT_DISCONNECTION_COMPLETE: 1063 if (!packet[2]){ 1064 handle = READ_BT_16(packet, 3); 1065 hci_connection_t * conn = hci_connection_for_handle(handle); 1066 if (conn) { 1067 hci_shutdown_connection(conn); 1068 } 1069 } 1070 break; 1071 1072 case HCI_EVENT_HARDWARE_ERROR: 1073 if(hci_stack->control && hci_stack->control->hw_error){ 1074 (*hci_stack->control->hw_error)(); 1075 } else { 1076 // if no special requests, just reboot stack 1077 hci_power_control_off(); 1078 hci_power_control_on(); 1079 } 1080 break; 1081 1082 case DAEMON_EVENT_HCI_PACKET_SENT: 1083 // free packet buffer for asynchronous transport 1084 if (hci_transport_synchronous()) break; 1085 hci_stack->hci_packet_buffer_reserved = 0; 1086 break; 1087 1088 #ifdef HAVE_BLE 1089 case HCI_EVENT_LE_META: 1090 switch (packet[2]){ 1091 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1092 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1093 le_handle_advertisement_report(packet, size); 1094 break; 1095 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1096 // Connection management 1097 bt_flip_addr(addr, &packet[8]); 1098 addr_type = (bd_addr_type_t)packet[7]; 1099 log_info("LE Connection_complete (status=%u) type %u, %s\n", packet[3], addr_type, bd_addr_to_str(addr)); 1100 // LE connections are auto-accepted, so just create a connection if there isn't one already 1101 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 1102 if (packet[3]){ 1103 if (conn){ 1104 // outgoing connection failed, remove entry 1105 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1106 btstack_memory_hci_connection_free( conn ); 1107 } 1108 // if authentication error, also delete link key 1109 if (packet[3] == 0x05) { 1110 hci_drop_link_key_for_bd_addr(&addr); 1111 } 1112 break; 1113 } 1114 if (!conn){ 1115 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1116 } 1117 if (!conn){ 1118 // no memory 1119 break; 1120 } 1121 1122 conn->state = OPEN; 1123 conn->con_handle = READ_BT_16(packet, 4); 1124 1125 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1126 1127 // restart timer 1128 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1129 // run_loop_add_timer(&conn->timeout); 1130 1131 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 1132 1133 hci_emit_nr_connections_changed(); 1134 break; 1135 1136 // printf("LE buffer size: %u, count %u\n", READ_BT_16(packet,6), packet[8]); 1137 1138 default: 1139 break; 1140 } 1141 break; 1142 #endif 1143 default: 1144 break; 1145 } 1146 1147 // handle BT initialization 1148 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1149 hci_initializing_event_handler(packet, size); 1150 } 1151 1152 // help with BT sleep 1153 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1154 && hci_stack->substate == 1 1155 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1156 hci_stack->substate++; 1157 } 1158 1159 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1160 1161 // execute main loop 1162 hci_run(); 1163 } 1164 1165 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1166 switch (packet_type) { 1167 case HCI_EVENT_PACKET: 1168 event_handler(packet, size); 1169 break; 1170 case HCI_ACL_DATA_PACKET: 1171 acl_handler(packet, size); 1172 break; 1173 default: 1174 break; 1175 } 1176 } 1177 1178 /** Register HCI packet handlers */ 1179 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1180 hci_stack->packet_handler = handler; 1181 } 1182 1183 static void hci_state_reset(){ 1184 // no connections yet 1185 hci_stack->connections = NULL; 1186 1187 // keep discoverable/connectable as this has been requested by the client(s) 1188 // hci_stack->discoverable = 0; 1189 // hci_stack->connectable = 0; 1190 // hci_stack->bondable = 1; 1191 1192 // buffer is free 1193 hci_stack->hci_packet_buffer_reserved = 0; 1194 1195 // no pending cmds 1196 hci_stack->decline_reason = 0; 1197 hci_stack->new_scan_enable_value = 0xff; 1198 1199 // LE 1200 hci_stack->adv_addr_type = 0; 1201 memset(hci_stack->adv_address, 0, 6); 1202 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1203 hci_stack->le_scan_type = 0xff; 1204 } 1205 1206 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 1207 1208 #ifdef HAVE_MALLOC 1209 if (!hci_stack) { 1210 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1211 } 1212 #else 1213 hci_stack = &hci_stack_static; 1214 #endif 1215 memset(hci_stack, 0, sizeof(hci_stack_t)); 1216 1217 // reference to use transport layer implementation 1218 hci_stack->hci_transport = transport; 1219 1220 // references to used control implementation 1221 hci_stack->control = control; 1222 1223 // reference to used config 1224 hci_stack->config = config; 1225 1226 // higher level handler 1227 hci_stack->packet_handler = dummy_handler; 1228 1229 // store and open remote device db 1230 hci_stack->remote_device_db = remote_device_db; 1231 if (hci_stack->remote_device_db) { 1232 hci_stack->remote_device_db->open(); 1233 } 1234 1235 // max acl payload size defined in config.h 1236 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1237 1238 // register packet handlers with transport 1239 transport->register_packet_handler(&packet_handler); 1240 1241 hci_stack->state = HCI_STATE_OFF; 1242 1243 // class of device 1244 hci_stack->class_of_device = 0x007a020c; // Smartphone 1245 1246 // bondable by default 1247 hci_stack->bondable = 1; 1248 1249 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1250 hci_stack->ssp_enable = 1; 1251 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1252 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1253 hci_stack->ssp_auto_accept = 1; 1254 1255 hci_state_reset(); 1256 } 1257 1258 void hci_close(){ 1259 // close remote device db 1260 if (hci_stack->remote_device_db) { 1261 hci_stack->remote_device_db->close(); 1262 } 1263 while (hci_stack->connections) { 1264 // cancel all l2cap connections 1265 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 1266 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1267 } 1268 hci_power_control(HCI_POWER_OFF); 1269 1270 #ifdef HAVE_MALLOC 1271 free(hci_stack); 1272 #endif 1273 hci_stack = NULL; 1274 } 1275 1276 void hci_set_class_of_device(uint32_t class_of_device){ 1277 hci_stack->class_of_device = class_of_device; 1278 } 1279 1280 void hci_disable_l2cap_timeout_check(){ 1281 disable_l2cap_timeouts = 1; 1282 } 1283 // State-Module-Driver overview 1284 // state module low-level 1285 // HCI_STATE_OFF off close 1286 // HCI_STATE_INITIALIZING, on open 1287 // HCI_STATE_WORKING, on open 1288 // HCI_STATE_HALTING, on open 1289 // HCI_STATE_SLEEPING, off/sleep close 1290 // HCI_STATE_FALLING_ASLEEP on open 1291 1292 static int hci_power_control_on(void){ 1293 1294 // power on 1295 int err = 0; 1296 if (hci_stack->control && hci_stack->control->on){ 1297 err = (*hci_stack->control->on)(hci_stack->config); 1298 } 1299 if (err){ 1300 log_error( "POWER_ON failed\n"); 1301 hci_emit_hci_open_failed(); 1302 return err; 1303 } 1304 1305 // open low-level device 1306 err = hci_stack->hci_transport->open(hci_stack->config); 1307 if (err){ 1308 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1309 if (hci_stack->control && hci_stack->control->off){ 1310 (*hci_stack->control->off)(hci_stack->config); 1311 } 1312 hci_emit_hci_open_failed(); 1313 return err; 1314 } 1315 return 0; 1316 } 1317 1318 static void hci_power_control_off(void){ 1319 1320 log_info("hci_power_control_off\n"); 1321 1322 // close low-level device 1323 hci_stack->hci_transport->close(hci_stack->config); 1324 1325 log_info("hci_power_control_off - hci_transport closed\n"); 1326 1327 // power off 1328 if (hci_stack->control && hci_stack->control->off){ 1329 (*hci_stack->control->off)(hci_stack->config); 1330 } 1331 1332 log_info("hci_power_control_off - control closed\n"); 1333 1334 hci_stack->state = HCI_STATE_OFF; 1335 } 1336 1337 static void hci_power_control_sleep(void){ 1338 1339 log_info("hci_power_control_sleep\n"); 1340 1341 #if 0 1342 // don't close serial port during sleep 1343 1344 // close low-level device 1345 hci_stack->hci_transport->close(hci_stack->config); 1346 #endif 1347 1348 // sleep mode 1349 if (hci_stack->control && hci_stack->control->sleep){ 1350 (*hci_stack->control->sleep)(hci_stack->config); 1351 } 1352 1353 hci_stack->state = HCI_STATE_SLEEPING; 1354 } 1355 1356 static int hci_power_control_wake(void){ 1357 1358 log_info("hci_power_control_wake\n"); 1359 1360 // wake on 1361 if (hci_stack->control && hci_stack->control->wake){ 1362 (*hci_stack->control->wake)(hci_stack->config); 1363 } 1364 1365 #if 0 1366 // open low-level device 1367 int err = hci_stack->hci_transport->open(hci_stack->config); 1368 if (err){ 1369 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1370 if (hci_stack->control && hci_stack->control->off){ 1371 (*hci_stack->control->off)(hci_stack->config); 1372 } 1373 hci_emit_hci_open_failed(); 1374 return err; 1375 } 1376 #endif 1377 1378 return 0; 1379 } 1380 1381 static void hci_power_transition_to_initializing(void){ 1382 // set up state machine 1383 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1384 hci_stack->hci_packet_buffer_reserved = 0; 1385 hci_stack->state = HCI_STATE_INITIALIZING; 1386 hci_stack->substate = 0; 1387 } 1388 1389 int hci_power_control(HCI_POWER_MODE power_mode){ 1390 1391 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack->state); 1392 1393 int err = 0; 1394 switch (hci_stack->state){ 1395 1396 case HCI_STATE_OFF: 1397 switch (power_mode){ 1398 case HCI_POWER_ON: 1399 err = hci_power_control_on(); 1400 if (err) { 1401 log_error("hci_power_control_on() error %u", err); 1402 return err; 1403 } 1404 hci_power_transition_to_initializing(); 1405 break; 1406 case HCI_POWER_OFF: 1407 // do nothing 1408 break; 1409 case HCI_POWER_SLEEP: 1410 // do nothing (with SLEEP == OFF) 1411 break; 1412 } 1413 break; 1414 1415 case HCI_STATE_INITIALIZING: 1416 switch (power_mode){ 1417 case HCI_POWER_ON: 1418 // do nothing 1419 break; 1420 case HCI_POWER_OFF: 1421 // no connections yet, just turn it off 1422 hci_power_control_off(); 1423 break; 1424 case HCI_POWER_SLEEP: 1425 // no connections yet, just turn it off 1426 hci_power_control_sleep(); 1427 break; 1428 } 1429 break; 1430 1431 case HCI_STATE_WORKING: 1432 switch (power_mode){ 1433 case HCI_POWER_ON: 1434 // do nothing 1435 break; 1436 case HCI_POWER_OFF: 1437 // see hci_run 1438 hci_stack->state = HCI_STATE_HALTING; 1439 break; 1440 case HCI_POWER_SLEEP: 1441 // see hci_run 1442 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1443 hci_stack->substate = 0; 1444 break; 1445 } 1446 break; 1447 1448 case HCI_STATE_HALTING: 1449 switch (power_mode){ 1450 case HCI_POWER_ON: 1451 hci_power_transition_to_initializing(); 1452 break; 1453 case HCI_POWER_OFF: 1454 // do nothing 1455 break; 1456 case HCI_POWER_SLEEP: 1457 // see hci_run 1458 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1459 hci_stack->substate = 0; 1460 break; 1461 } 1462 break; 1463 1464 case HCI_STATE_FALLING_ASLEEP: 1465 switch (power_mode){ 1466 case HCI_POWER_ON: 1467 1468 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1469 // nothing to do, if H4 supports power management 1470 if (bt_control_iphone_power_management_enabled()){ 1471 hci_stack->state = HCI_STATE_INITIALIZING; 1472 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1473 break; 1474 } 1475 #endif 1476 hci_power_transition_to_initializing(); 1477 break; 1478 case HCI_POWER_OFF: 1479 // see hci_run 1480 hci_stack->state = HCI_STATE_HALTING; 1481 break; 1482 case HCI_POWER_SLEEP: 1483 // do nothing 1484 break; 1485 } 1486 break; 1487 1488 case HCI_STATE_SLEEPING: 1489 switch (power_mode){ 1490 case HCI_POWER_ON: 1491 1492 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1493 // nothing to do, if H4 supports power management 1494 if (bt_control_iphone_power_management_enabled()){ 1495 hci_stack->state = HCI_STATE_INITIALIZING; 1496 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1497 hci_update_scan_enable(); 1498 break; 1499 } 1500 #endif 1501 err = hci_power_control_wake(); 1502 if (err) return err; 1503 hci_power_transition_to_initializing(); 1504 break; 1505 case HCI_POWER_OFF: 1506 hci_stack->state = HCI_STATE_HALTING; 1507 break; 1508 case HCI_POWER_SLEEP: 1509 // do nothing 1510 break; 1511 } 1512 break; 1513 } 1514 1515 // create internal event 1516 hci_emit_state(); 1517 1518 // trigger next/first action 1519 hci_run(); 1520 1521 return 0; 1522 } 1523 1524 static void hci_update_scan_enable(void){ 1525 // 2 = page scan, 1 = inq scan 1526 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 1527 hci_run(); 1528 } 1529 1530 void hci_discoverable_control(uint8_t enable){ 1531 if (enable) enable = 1; // normalize argument 1532 1533 if (hci_stack->discoverable == enable){ 1534 hci_emit_discoverable_enabled(hci_stack->discoverable); 1535 return; 1536 } 1537 1538 hci_stack->discoverable = enable; 1539 hci_update_scan_enable(); 1540 } 1541 1542 void hci_connectable_control(uint8_t enable){ 1543 if (enable) enable = 1; // normalize argument 1544 1545 // don't emit event 1546 if (hci_stack->connectable == enable) return; 1547 1548 hci_stack->connectable = enable; 1549 hci_update_scan_enable(); 1550 } 1551 1552 bd_addr_t * hci_local_bd_addr(void){ 1553 return &hci_stack->local_bd_addr; 1554 } 1555 1556 void hci_run(){ 1557 1558 hci_connection_t * connection; 1559 linked_item_t * it; 1560 1561 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1562 1563 // global/non-connection oriented commands 1564 1565 // decline incoming connections 1566 if (hci_stack->decline_reason){ 1567 uint8_t reason = hci_stack->decline_reason; 1568 hci_stack->decline_reason = 0; 1569 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 1570 return; 1571 } 1572 1573 // send scan enable 1574 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 1575 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1576 hci_stack->new_scan_enable_value = 0xff; 1577 return; 1578 } 1579 1580 #ifdef HAVE_BLE 1581 // handle le scan 1582 if (hci_stack->state == HCI_STATE_WORKING){ 1583 switch(hci_stack->le_scanning_state){ 1584 case LE_START_SCAN: 1585 hci_stack->le_scanning_state = LE_SCANNING; 1586 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 1587 return; 1588 1589 case LE_STOP_SCAN: 1590 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1591 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 1592 return; 1593 default: 1594 break; 1595 } 1596 if (hci_stack->le_scan_type != 0xff){ 1597 // defaults: active scanning, accept all advertisement packets 1598 int scan_type = hci_stack->le_scan_type; 1599 hci_stack->le_scan_type = 0xff; 1600 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); 1601 return; 1602 } 1603 } 1604 #endif 1605 1606 // send pending HCI commands 1607 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 1608 connection = (hci_connection_t *) it; 1609 1610 switch(connection->state){ 1611 case SEND_CREATE_CONNECTION: 1612 switch(connection->address_type){ 1613 case BD_ADDR_TYPE_CLASSIC: 1614 log_info("sending hci_create_connection\n"); 1615 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 1616 break; 1617 default: 1618 #ifdef HAVE_BLE 1619 log_info("sending hci_le_create_connection\n"); 1620 hci_send_cmd(&hci_le_create_connection, 1621 0x0060, // scan interval: 60 ms 1622 0x0030, // scan interval: 30 ms 1623 0, // don't use whitelist 1624 connection->address_type, // peer address type 1625 connection->address, // peer bd addr 1626 hci_stack->adv_addr_type, // our addr type: 1627 0x0008, // conn interval min 1628 0x0018, // conn interval max 1629 0, // conn latency 1630 0x0048, // supervision timeout 1631 0x0001, // min ce length 1632 0x0001 // max ce length 1633 ); 1634 1635 connection->state = SENT_CREATE_CONNECTION; 1636 #endif 1637 break; 1638 } 1639 return; 1640 1641 case RECEIVED_CONNECTION_REQUEST: 1642 log_info("sending hci_accept_connection_request\n"); 1643 connection->state = ACCEPTED_CONNECTION_REQUEST; 1644 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1645 return; 1646 1647 #ifdef HAVE_BLE 1648 case SEND_CANCEL_CONNECTION: 1649 connection->state = SENT_CANCEL_CONNECTION; 1650 hci_send_cmd(&hci_le_create_connection_cancel); 1651 return; 1652 #endif 1653 case SEND_DISCONNECT: 1654 connection->state = SENT_DISCONNECT; 1655 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1656 return; 1657 1658 default: 1659 break; 1660 } 1661 1662 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1663 log_info("responding to link key request\n"); 1664 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1665 link_key_t link_key; 1666 link_key_type_t link_key_type; 1667 if ( hci_stack->remote_device_db 1668 && hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type) 1669 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 1670 connection->link_key_type = link_key_type; 1671 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1672 } else { 1673 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1674 } 1675 return; 1676 } 1677 1678 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 1679 log_info("denying to pin request\n"); 1680 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 1681 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 1682 return; 1683 } 1684 1685 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1686 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1687 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 1688 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 1689 // tweak authentication requirements 1690 uint8_t authreq = hci_stack->ssp_authentication_requirement; 1691 if (connection->bonding_flags & BONDING_DEDICATED){ 1692 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 1693 } 1694 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 1695 authreq |= 1; 1696 } 1697 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 1698 } else { 1699 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 1700 } 1701 return; 1702 } 1703 1704 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1705 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1706 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1707 return; 1708 } 1709 1710 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1711 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1712 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1713 return; 1714 } 1715 1716 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 1717 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 1718 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 1719 return; 1720 } 1721 1722 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 1723 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 1724 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 1725 return; 1726 } 1727 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 1728 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 1729 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 1730 return; 1731 } 1732 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 1733 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 1734 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 1735 return; 1736 } 1737 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 1738 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 1739 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 1740 return; 1741 } 1742 } 1743 1744 switch (hci_stack->state){ 1745 case HCI_STATE_INITIALIZING: 1746 hci_initializing_state_machine(); 1747 break; 1748 1749 case HCI_STATE_HALTING: 1750 1751 log_info("HCI_STATE_HALTING\n"); 1752 // close all open connections 1753 connection = (hci_connection_t *) hci_stack->connections; 1754 if (connection){ 1755 1756 // send disconnect 1757 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1758 1759 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1760 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1761 1762 // send disconnected event right away - causes higher layer connections to get closed, too. 1763 hci_shutdown_connection(connection); 1764 return; 1765 } 1766 log_info("HCI_STATE_HALTING, calling off\n"); 1767 1768 // switch mode 1769 hci_power_control_off(); 1770 1771 log_info("HCI_STATE_HALTING, emitting state\n"); 1772 hci_emit_state(); 1773 log_info("HCI_STATE_HALTING, done\n"); 1774 break; 1775 1776 case HCI_STATE_FALLING_ASLEEP: 1777 switch(hci_stack->substate) { 1778 case 0: 1779 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1780 // close all open connections 1781 connection = (hci_connection_t *) hci_stack->connections; 1782 1783 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1784 // don't close connections, if H4 supports power management 1785 if (bt_control_iphone_power_management_enabled()){ 1786 connection = NULL; 1787 } 1788 #endif 1789 if (connection){ 1790 1791 // send disconnect 1792 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1793 1794 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1795 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1796 1797 // send disconnected event right away - causes higher layer connections to get closed, too. 1798 hci_shutdown_connection(connection); 1799 return; 1800 } 1801 1802 if (hci_classic_supported()){ 1803 // disable page and inquiry scan 1804 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1805 1806 log_info("HCI_STATE_HALTING, disabling inq scans\n"); 1807 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 1808 1809 // continue in next sub state 1810 hci_stack->substate++; 1811 break; 1812 } 1813 // fall through for ble-only chips 1814 1815 case 2: 1816 log_info("HCI_STATE_HALTING, calling sleep\n"); 1817 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1818 // don't actually go to sleep, if H4 supports power management 1819 if (bt_control_iphone_power_management_enabled()){ 1820 // SLEEP MODE reached 1821 hci_stack->state = HCI_STATE_SLEEPING; 1822 hci_emit_state(); 1823 break; 1824 } 1825 #endif 1826 // switch mode 1827 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 1828 hci_emit_state(); 1829 break; 1830 1831 default: 1832 break; 1833 } 1834 break; 1835 1836 default: 1837 break; 1838 } 1839 } 1840 1841 int hci_send_cmd_packet(uint8_t *packet, int size){ 1842 bd_addr_t addr; 1843 hci_connection_t * conn; 1844 // house-keeping 1845 1846 // create_connection? 1847 if (IS_COMMAND(packet, hci_create_connection)){ 1848 bt_flip_addr(addr, &packet[3]); 1849 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1850 1851 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1852 if (!conn){ 1853 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1854 if (!conn){ 1855 // notify client that alloc failed 1856 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1857 return 0; // don't sent packet to controller 1858 } 1859 conn->state = SEND_CREATE_CONNECTION; 1860 } 1861 log_info("conn state %u", conn->state); 1862 switch (conn->state){ 1863 // if connection active exists 1864 case OPEN: 1865 // and OPEN, emit connection complete command, don't send to controller 1866 hci_emit_connection_complete(conn, 0); 1867 return 0; 1868 case SEND_CREATE_CONNECTION: 1869 // connection created by hci, e.g. dedicated bonding 1870 break; 1871 default: 1872 // otherwise, just ignore as it is already in the open process 1873 return 0; 1874 } 1875 conn->state = SENT_CREATE_CONNECTION; 1876 } 1877 1878 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1879 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1880 } 1881 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1882 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1883 } 1884 1885 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1886 if (hci_stack->remote_device_db){ 1887 bt_flip_addr(addr, &packet[3]); 1888 hci_stack->remote_device_db->delete_link_key(&addr); 1889 } 1890 } 1891 1892 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 1893 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 1894 bt_flip_addr(addr, &packet[3]); 1895 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1896 if (conn){ 1897 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 1898 } 1899 } 1900 1901 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 1902 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 1903 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 1904 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 1905 bt_flip_addr(addr, &packet[3]); 1906 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1907 if (conn){ 1908 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 1909 } 1910 } 1911 1912 #ifdef HAVE_BLE 1913 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 1914 hci_stack->adv_addr_type = packet[8]; 1915 } 1916 if (IS_COMMAND(packet, hci_le_set_random_address)){ 1917 bt_flip_addr(hci_stack->adv_address, &packet[3]); 1918 } 1919 #endif 1920 1921 hci_stack->num_cmd_packets--; 1922 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1923 1924 // free packet buffer for synchronous transport implementations 1925 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 1926 hci_stack->hci_packet_buffer_reserved = 0; 1927 } 1928 1929 return err; 1930 } 1931 1932 // disconnect because of security block 1933 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 1934 hci_connection_t * connection = hci_connection_for_handle(con_handle); 1935 if (!connection) return; 1936 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 1937 } 1938 1939 1940 // Configure Secure Simple Pairing 1941 1942 // enable will enable SSP during init 1943 void hci_ssp_set_enable(int enable){ 1944 hci_stack->ssp_enable = enable; 1945 } 1946 1947 int hci_local_ssp_activated(){ 1948 return hci_ssp_supported() && hci_stack->ssp_enable; 1949 } 1950 1951 // if set, BTstack will respond to io capability request using authentication requirement 1952 void hci_ssp_set_io_capability(int io_capability){ 1953 hci_stack->ssp_io_capability = io_capability; 1954 } 1955 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 1956 hci_stack->ssp_authentication_requirement = authentication_requirement; 1957 } 1958 1959 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 1960 void hci_ssp_set_auto_accept(int auto_accept){ 1961 hci_stack->ssp_auto_accept = auto_accept; 1962 } 1963 1964 /** 1965 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1966 */ 1967 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1968 1969 // for HCI INITIALIZATION 1970 // printf("hci_send_cmd: opcode %04x\n", cmd->opcode); 1971 hci_stack->last_cmd_opcode = cmd->opcode; 1972 1973 va_list argptr; 1974 va_start(argptr, cmd); 1975 uint16_t size = hci_create_cmd_internal(hci_stack->hci_packet_buffer, cmd, argptr); 1976 va_end(argptr); 1977 return hci_send_cmd_packet(hci_stack->hci_packet_buffer, size); 1978 } 1979 1980 // Create various non-HCI events. 1981 // TODO: generalize, use table similar to hci_create_command 1982 1983 void hci_emit_state(){ 1984 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 1985 uint8_t event[3]; 1986 event[0] = BTSTACK_EVENT_STATE; 1987 event[1] = sizeof(event) - 2; 1988 event[2] = hci_stack->state; 1989 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1990 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1991 } 1992 1993 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1994 uint8_t event[13]; 1995 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1996 event[1] = sizeof(event) - 2; 1997 event[2] = status; 1998 bt_store_16(event, 3, conn->con_handle); 1999 bt_flip_addr(&event[5], conn->address); 2000 event[11] = 1; // ACL connection 2001 event[12] = 0; // encryption disabled 2002 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2003 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2004 } 2005 2006 void hci_emit_le_connection_complete(hci_connection_t *conn, uint8_t status){ 2007 uint8_t event[21]; 2008 event[0] = HCI_EVENT_LE_META; 2009 event[1] = sizeof(event) - 2; 2010 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 2011 event[3] = status; 2012 bt_store_16(event, 4, conn->con_handle); 2013 event[6] = 0; // TODO: role 2014 event[7] = conn->address_type; 2015 bt_flip_addr(&event[8], conn->address); 2016 bt_store_16(event, 14, 0); // interval 2017 bt_store_16(event, 16, 0); // latency 2018 bt_store_16(event, 18, 0); // supervision timeout 2019 event[20] = 0; // master clock accuracy 2020 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2021 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2022 } 2023 2024 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 2025 uint8_t event[6]; 2026 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 2027 event[1] = sizeof(event) - 2; 2028 event[2] = 0; // status = OK 2029 bt_store_16(event, 3, handle); 2030 event[5] = reason; 2031 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2032 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2033 } 2034 2035 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 2036 if (disable_l2cap_timeouts) return; 2037 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 2038 uint8_t event[4]; 2039 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 2040 event[1] = sizeof(event) - 2; 2041 bt_store_16(event, 2, conn->con_handle); 2042 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2043 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2044 } 2045 2046 void hci_emit_nr_connections_changed(){ 2047 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 2048 uint8_t event[3]; 2049 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 2050 event[1] = sizeof(event) - 2; 2051 event[2] = nr_hci_connections(); 2052 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2053 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2054 } 2055 2056 void hci_emit_hci_open_failed(){ 2057 log_info("BTSTACK_EVENT_POWERON_FAILED"); 2058 uint8_t event[2]; 2059 event[0] = BTSTACK_EVENT_POWERON_FAILED; 2060 event[1] = sizeof(event) - 2; 2061 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2062 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2063 } 2064 2065 #ifndef EMBEDDED 2066 void hci_emit_btstack_version() { 2067 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 2068 uint8_t event[6]; 2069 event[0] = BTSTACK_EVENT_VERSION; 2070 event[1] = sizeof(event) - 2; 2071 event[2] = BTSTACK_MAJOR; 2072 event[3] = BTSTACK_MINOR; 2073 bt_store_16(event, 4, BTSTACK_REVISION); 2074 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2075 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2076 } 2077 #endif 2078 2079 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 2080 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 2081 uint8_t event[3]; 2082 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 2083 event[1] = sizeof(event) - 2; 2084 event[2] = enabled; 2085 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2086 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2087 } 2088 2089 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 2090 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 2091 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 2092 event[1] = sizeof(event) - 2 - 1; 2093 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 2094 bt_flip_addr(&event[3], *addr); 2095 memcpy(&event[9], name, 248); 2096 2097 event[9+248] = 0; // assert \0 for log_info 2098 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 2099 2100 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 2101 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 2102 } 2103 2104 void hci_emit_discoverable_enabled(uint8_t enabled){ 2105 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 2106 uint8_t event[3]; 2107 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 2108 event[1] = sizeof(event) - 2; 2109 event[2] = enabled; 2110 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2111 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2112 } 2113 2114 void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 2115 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 2116 uint8_t event[5]; 2117 int pos = 0; 2118 event[pos++] = GAP_SECURITY_LEVEL; 2119 event[pos++] = sizeof(event) - 2; 2120 bt_store_16(event, 2, con_handle); 2121 pos += 2; 2122 event[pos++] = level; 2123 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2124 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2125 } 2126 2127 void hci_emit_dedicated_bonding_result(hci_connection_t * connection, uint8_t status){ 2128 log_info("hci_emit_dedicated_bonding_result %u ", status); 2129 uint8_t event[9]; 2130 int pos = 0; 2131 event[pos++] = GAP_DEDICATED_BONDING_COMPLETED; 2132 event[pos++] = sizeof(event) - 2; 2133 event[pos++] = status; 2134 bt_flip_addr( * (bd_addr_t *) &event[pos], connection->address); 2135 pos += 6; 2136 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2137 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2138 } 2139 2140 // query if remote side supports SSP 2141 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 2142 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2143 if (!connection) return 0; 2144 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 2145 } 2146 2147 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 2148 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 2149 } 2150 2151 // GAP API 2152 /** 2153 * @bbrief enable/disable bonding. default is enabled 2154 * @praram enabled 2155 */ 2156 void gap_set_bondable_mode(int enable){ 2157 hci_stack->bondable = enable ? 1 : 0; 2158 } 2159 2160 /** 2161 * @brief map link keys to security levels 2162 */ 2163 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 2164 switch (link_key_type){ 2165 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 2166 return LEVEL_4; 2167 case COMBINATION_KEY: 2168 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 2169 return LEVEL_3; 2170 default: 2171 return LEVEL_2; 2172 } 2173 } 2174 2175 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 2176 if (!connection) return LEVEL_0; 2177 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 2178 return gap_security_level_for_link_key_type(connection->link_key_type); 2179 } 2180 2181 2182 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 2183 log_info("gap_mitm_protection_required_for_security_level %u", level); 2184 return level > LEVEL_2; 2185 } 2186 2187 /** 2188 * @brief get current security level 2189 */ 2190 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 2191 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2192 if (!connection) return LEVEL_0; 2193 return gap_security_level_for_connection(connection); 2194 } 2195 2196 /** 2197 * @brief request connection to device to 2198 * @result GAP_AUTHENTICATION_RESULT 2199 */ 2200 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 2201 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2202 if (!connection){ 2203 hci_emit_security_level(con_handle, LEVEL_0); 2204 return; 2205 } 2206 gap_security_level_t current_level = gap_security_level(con_handle); 2207 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 2208 if (current_level >= requested_level){ 2209 hci_emit_security_level(con_handle, current_level); 2210 return; 2211 } 2212 2213 connection->requested_security_level = requested_level; 2214 2215 // would enabling ecnryption suffice (>= LEVEL_2)? 2216 if (hci_stack->remote_device_db){ 2217 link_key_type_t link_key_type; 2218 link_key_t link_key; 2219 if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 2220 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 2221 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2222 return; 2223 } 2224 } 2225 } 2226 2227 // try to authenticate connection 2228 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2229 hci_run(); 2230 } 2231 2232 /** 2233 * @brief start dedicated bonding with device. disconnect after bonding 2234 * @param device 2235 * @param request MITM protection 2236 * @result GAP_DEDICATED_BONDING_COMPLETE 2237 */ 2238 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 2239 2240 // create connection state machine 2241 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 2242 2243 if (!connection){ 2244 return BTSTACK_MEMORY_ALLOC_FAILED; 2245 } 2246 2247 // delete linkn key 2248 hci_drop_link_key_for_bd_addr( (bd_addr_t *) &device); 2249 2250 // configure LEVEL_2/3, dedicated bonding 2251 connection->state = SEND_CREATE_CONNECTION; 2252 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 2253 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 2254 connection->bonding_flags = BONDING_DEDICATED; 2255 2256 // wait for GAP Security Result and send GAP Dedicated Bonding complete 2257 2258 // handle: connnection failure (connection complete != ok) 2259 // handle: authentication failure 2260 // handle: disconnect on done 2261 2262 hci_run(); 2263 2264 return 0; 2265 } 2266 2267 void gap_set_local_name(const char * local_name){ 2268 hci_stack->local_name = local_name; 2269 } 2270 2271 le_command_status_t le_central_start_scan(){ 2272 if (hci_stack->le_scanning_state == LE_SCANNING) return BLE_PERIPHERAL_OK; 2273 hci_stack->le_scanning_state = LE_START_SCAN; 2274 hci_run(); 2275 return BLE_PERIPHERAL_OK; 2276 } 2277 2278 le_command_status_t le_central_stop_scan(){ 2279 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return BLE_PERIPHERAL_OK; 2280 hci_stack->le_scanning_state = LE_STOP_SCAN; 2281 hci_run(); 2282 return BLE_PERIPHERAL_OK; 2283 } 2284 2285 void le_central_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 2286 hci_stack->le_scan_type = scan_type; 2287 hci_stack->le_scan_interval = scan_interval; 2288 hci_stack->le_scan_window = scan_window; 2289 hci_run(); 2290 } 2291 2292 le_command_status_t le_central_connect(bd_addr_t * addr, bd_addr_type_t addr_type){ 2293 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2294 if (!conn){ 2295 log_info("le_central_connect: no connection exists yet, creating context"); 2296 conn = create_connection_for_bd_addr_and_type(*addr, addr_type); 2297 if (!conn){ 2298 // notify client that alloc failed 2299 hci_emit_le_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2300 log_info("le_central_connect: failed to alloc context"); 2301 return BLE_PERIPHERAL_NOT_CONNECTED; // don't sent packet to controller 2302 } 2303 conn->state = SEND_CREATE_CONNECTION; 2304 log_info("le_central_connect: send create connection next"); 2305 hci_run(); 2306 return BLE_PERIPHERAL_OK; 2307 } 2308 2309 if (!hci_is_le_connection(conn) || 2310 conn->state == SEND_CREATE_CONNECTION || 2311 conn->state == SENT_CREATE_CONNECTION) { 2312 hci_emit_le_connection_complete(conn, ERROR_CODE_COMMAND_DISALLOWED); 2313 log_error("le_central_connect: classic connection or connect is already being created"); 2314 return BLE_PERIPHERAL_IN_WRONG_STATE; 2315 } 2316 2317 log_info("le_central_connect: context exists with state %u", conn->state); 2318 hci_emit_le_connection_complete(conn, 0); 2319 hci_run(); 2320 return BLE_PERIPHERAL_OK; 2321 } 2322 2323 // @assumption: only a single outgoing LE Connection exists 2324 static hci_connection_t * le_central_get_outgoing_connection(){ 2325 linked_item_t *it; 2326 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 2327 hci_connection_t * conn = (hci_connection_t *) it; 2328 if (!hci_is_le_connection(conn)) continue; 2329 switch (conn->state){ 2330 case SEND_CREATE_CONNECTION: 2331 case SENT_CREATE_CONNECTION: 2332 return conn; 2333 default: 2334 break; 2335 }; 2336 } 2337 return NULL; 2338 } 2339 2340 le_command_status_t le_central_connect_cancel(){ 2341 hci_connection_t * conn = le_central_get_outgoing_connection(); 2342 switch (conn->state){ 2343 case SEND_CREATE_CONNECTION: 2344 // skip sending create connection and emit event instead 2345 hci_emit_le_connection_complete(conn, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 2346 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 2347 btstack_memory_hci_connection_free( conn ); 2348 break; 2349 case SENT_CREATE_CONNECTION: 2350 // request to send cancel connection 2351 conn->state = SEND_CANCEL_CONNECTION; 2352 hci_run(); 2353 break; 2354 default: 2355 break; 2356 } 2357 return BLE_PERIPHERAL_OK; 2358 } 2359 2360 le_command_status_t gap_disconnect(hci_con_handle_t handle){ 2361 hci_connection_t * conn = hci_connection_for_handle(handle); 2362 if (!conn){ 2363 hci_emit_disconnection_complete(handle, 0); 2364 return BLE_PERIPHERAL_OK; 2365 } 2366 conn->state = SEND_DISCONNECT; 2367 hci_run(); 2368 return BLE_PERIPHERAL_OK; 2369 } 2370 2371 void hci_disconnect_all(){ 2372 linked_list_iterator_t it; 2373 linked_list_iterator_init(&it, &hci_stack->connections); 2374 while (linked_list_iterator_has_next(&it)){ 2375 hci_connection_t * con = (hci_connection_t*) linked_list_iterator_next(&it); 2376 if (con->state == SENT_DISCONNECT) continue; 2377 con->state = SEND_DISCONNECT; 2378 } 2379 hci_run(); 2380 } 2381