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 } 257 258 259 // @deprecated 260 int hci_can_send_packet_now(uint8_t packet_type){ 261 switch (packet_type) { 262 case HCI_ACL_DATA_PACKET: 263 return hci_can_send_prepared_acl_packet_now(0); 264 case HCI_COMMAND_DATA_PACKET: 265 return hci_can_send_command_packet_now(); 266 default: 267 return 0; 268 } 269 } 270 271 // @deprecated 272 // same as hci_can_send_packet_now, but also checks if packet buffer is free for use 273 int hci_can_send_packet_now_using_packet_buffer(uint8_t packet_type){ 274 275 if (hci_stack->hci_packet_buffer_reserved) return 0; 276 277 switch (packet_type) { 278 case HCI_ACL_DATA_PACKET: 279 return hci_can_send_acl_packet_now(0); 280 case HCI_COMMAND_DATA_PACKET: 281 return hci_can_send_command_packet_now(); 282 default: 283 return 0; 284 } 285 } 286 287 288 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 289 int hci_can_send_command_packet_now(void){ 290 if (hci_stack->hci_packet_buffer_reserved) return 0; 291 292 // check for async hci transport implementations 293 if (hci_stack->hci_transport->can_send_packet_now){ 294 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 295 return 0; 296 } 297 } 298 299 return hci_stack->num_cmd_packets > 0; 300 } 301 302 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 303 // check for async hci transport implementations 304 if (hci_stack->hci_transport->can_send_packet_now){ 305 if (!hci_stack->hci_transport->can_send_packet_now(HCI_ACL_DATA_PACKET)){ 306 return 0; 307 } 308 } 309 return hci_number_free_acl_slots() > 0; 310 } 311 312 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 313 if (hci_stack->hci_packet_buffer_reserved) return 0; 314 return hci_can_send_prepared_acl_packet_now(con_handle); 315 } 316 317 // used for internal checks in l2cap[-le].c 318 int hci_is_packet_buffer_reserved(void){ 319 return hci_stack->hci_packet_buffer_reserved; 320 } 321 322 // reserves outgoing packet buffer. @returns 1 if successful 323 int hci_reserve_packet_buffer(void){ 324 if (hci_stack->hci_packet_buffer_reserved) { 325 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 326 return 0; 327 } 328 hci_stack->hci_packet_buffer_reserved = 1; 329 return 1; 330 } 331 332 void hci_release_packet_buffer(void){ 333 hci_stack->hci_packet_buffer_reserved = 0; 334 } 335 336 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 337 int hci_transport_synchronous(void){ 338 return hci_stack->hci_transport->can_send_packet_now == NULL; 339 } 340 341 // pre: caller has reserved the packet buffer 342 int hci_send_acl_packet_buffer(int size){ 343 344 if (!hci_stack->hci_packet_buffer_reserved) { 345 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 346 return 0; 347 } 348 349 // check for free places on Bluetooth module 350 if (!hci_number_free_acl_slots()) { 351 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 352 hci_release_packet_buffer(); 353 return BTSTACK_ACL_BUFFERS_FULL; 354 } 355 356 uint8_t * packet = hci_stack->hci_packet_buffer; 357 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 358 hci_connection_t *connection = hci_connection_for_handle( con_handle); 359 if (!connection) { 360 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 361 hci_release_packet_buffer(); 362 return 0; 363 } 364 hci_connection_timestamp(connection); 365 366 // count packet 367 connection->num_acl_packets_sent++; 368 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 369 370 // send packet 371 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 372 373 // free packet buffer for synchronous transport implementations 374 if (hci_transport_synchronous()){ 375 hci_release_packet_buffer(); 376 } 377 378 return err; 379 } 380 381 static void acl_handler(uint8_t *packet, int size){ 382 383 // log_info("acl_handler: size %u", size); 384 385 // get info 386 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 387 hci_connection_t *conn = hci_connection_for_handle(con_handle); 388 uint8_t acl_flags = READ_ACL_FLAGS(packet); 389 uint16_t acl_length = READ_ACL_LENGTH(packet); 390 391 // ignore non-registered handle 392 if (!conn){ 393 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 394 return; 395 } 396 397 // assert packet is complete 398 if (acl_length + 4 != size){ 399 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 400 return; 401 } 402 403 // update idle timestamp 404 hci_connection_timestamp(conn); 405 406 // handle different packet types 407 switch (acl_flags & 0x03) { 408 409 case 0x01: // continuation fragment 410 411 // sanity check 412 if (conn->acl_recombination_pos == 0) { 413 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 414 return; 415 } 416 417 // append fragment payload (header already stored) 418 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 419 conn->acl_recombination_pos += acl_length; 420 421 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 422 // conn->acl_recombination_pos, conn->acl_recombination_length); 423 424 // forward complete L2CAP packet if complete. 425 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 426 427 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 428 // reset recombination buffer 429 conn->acl_recombination_length = 0; 430 conn->acl_recombination_pos = 0; 431 } 432 break; 433 434 case 0x02: { // first fragment 435 436 // sanity check 437 if (conn->acl_recombination_pos) { 438 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 439 return; 440 } 441 442 // peek into L2CAP packet! 443 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 444 445 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 446 447 // compare fragment size to L2CAP packet size 448 if (acl_length >= l2cap_length + 4){ 449 450 // forward fragment as L2CAP packet 451 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 452 453 } else { 454 // store first fragment and tweak acl length for complete package 455 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 456 conn->acl_recombination_pos = acl_length + 4; 457 conn->acl_recombination_length = l2cap_length; 458 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 459 } 460 break; 461 462 } 463 default: 464 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 465 return; 466 } 467 468 // execute main loop 469 hci_run(); 470 } 471 472 static void hci_shutdown_connection(hci_connection_t *conn){ 473 log_info("Connection closed: handle 0x%x, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 474 475 run_loop_remove_timer(&conn->timeout); 476 477 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 478 btstack_memory_hci_connection_free( conn ); 479 480 // now it's gone 481 hci_emit_nr_connections_changed(); 482 } 483 484 static const uint16_t packet_type_sizes[] = { 485 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 486 HCI_ACL_DH1_SIZE, 0, 0, 0, 487 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 488 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 489 }; 490 static const uint8_t packet_type_feature_requirement_bit[] = { 491 0, // 3 slot packets 492 1, // 5 slot packets 493 25, // EDR 2 mpbs 494 26, // EDR 3 mbps 495 39, // 3 slot EDR packts 496 40, // 5 slot EDR packet 497 }; 498 static const uint16_t packet_type_feature_packet_mask[] = { 499 0x0f00, // 3 slot packets 500 0xf000, // 5 slot packets 501 0x1102, // EDR 2 mpbs 502 0x2204, // EDR 3 mbps 503 0x0300, // 3 slot EDR packts 504 0x3000, // 5 slot EDR packet 505 }; 506 507 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 508 // enable packet types based on size 509 uint16_t packet_types = 0; 510 int i; 511 for (i=0;i<16;i++){ 512 if (packet_type_sizes[i] == 0) continue; 513 if (packet_type_sizes[i] <= buffer_size){ 514 packet_types |= 1 << i; 515 } 516 } 517 // disable packet types due to missing local supported features 518 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 519 int bit_idx = packet_type_feature_requirement_bit[i]; 520 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 521 if (feature_set) continue; 522 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 523 packet_types &= ~packet_type_feature_packet_mask[i]; 524 } 525 // flip bits for "may not be used" 526 packet_types ^= 0x3306; 527 return packet_types; 528 } 529 530 uint16_t hci_usable_acl_packet_types(void){ 531 return hci_stack->packet_types; 532 } 533 534 uint8_t* hci_get_outgoing_packet_buffer(void){ 535 // hci packet buffer is >= acl data packet length 536 return hci_stack->hci_packet_buffer; 537 } 538 539 uint16_t hci_max_acl_data_packet_length(void){ 540 return hci_stack->acl_data_packet_length; 541 } 542 543 int hci_non_flushable_packet_boundary_flag_supported(void){ 544 // No. 54, byte 6, bit 6 545 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 546 } 547 548 int hci_ssp_supported(void){ 549 // No. 51, byte 6, bit 3 550 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 551 } 552 553 int hci_classic_supported(void){ 554 // No. 37, byte 4, bit 5, = No BR/EDR Support 555 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 556 } 557 558 int hci_le_supported(void){ 559 #ifdef HAVE_BLE 560 // No. 37, byte 4, bit 6 = LE Supported (Controller) 561 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 562 #else 563 return 0; 564 #endif 565 } 566 567 // get addr type and address used in advertisement packets 568 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t * addr){ 569 *addr_type = hci_stack->adv_addr_type; 570 if (hci_stack->adv_addr_type){ 571 memcpy(addr, hci_stack->adv_address, 6); 572 } else { 573 memcpy(addr, hci_stack->local_bd_addr, 6); 574 } 575 } 576 577 #ifdef HAVE_BLE 578 void le_handle_advertisement_report(uint8_t *packet, int size){ 579 int num_reports = packet[3]; 580 int i; 581 int total_data_length = 0; 582 int data_offset = 0; 583 584 for (i=0; i<num_reports;i++){ 585 total_data_length += packet[4+num_reports*8+i]; 586 } 587 588 log_info("num reports: %d, ", num_reports); 589 for (i=0; i<num_reports;i++){ 590 int pos = 0; 591 uint8_t data_length = packet[4+num_reports*8+i]; 592 uint8_t event_size = 10 + data_length; 593 uint8_t event[2 + event_size ]; 594 event[pos++] = GAP_LE_ADVERTISING_REPORT; 595 event[pos++] = event_size; 596 event[pos++] = packet[4+i]; // event_type; 597 event[pos++] = packet[4+num_reports+i]; // address_type; 598 memcpy(&event[pos], &packet[4+num_reports*2+i*6], 6); // bt address 599 pos += 6; 600 event[pos++] = packet[4+num_reports*9+total_data_length + i]; 601 log_info("rssi: %d, ", event[pos-1]); 602 event[pos++] = data_length; 603 memcpy(&event[pos], &packet[4+num_reports*9+data_offset], data_length); 604 data_offset += data_length; 605 pos += data_length; 606 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 607 } 608 } 609 #endif 610 611 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 612 uint8_t command_completed = 0; 613 if ((hci_stack->substate % 2) == 0) return; 614 // odd: waiting for event 615 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 616 uint16_t opcode = READ_BT_16(packet,3); 617 if (opcode == hci_stack->last_cmd_opcode){ 618 command_completed = 1; 619 log_info("Command complete for expected opcode %04x -> new substate %u", opcode, hci_stack->substate); 620 } else { 621 log_info("Command complete for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 622 } 623 } 624 if (packet[0] == HCI_EVENT_COMMAND_STATUS){ 625 uint8_t status = packet[2]; 626 uint16_t opcode = READ_BT_16(packet,4); 627 if (opcode == hci_stack->last_cmd_opcode){ 628 if (status){ 629 command_completed = 1; 630 log_error("Command status error 0x%02x for expected opcode %04x -> new substate %u", status, opcode, hci_stack->substate); 631 } else { 632 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 633 } 634 } else { 635 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 636 } 637 } 638 639 if (!command_completed) return; 640 641 switch(hci_stack->substate >> 1){ 642 default: 643 hci_stack->substate++; 644 break; 645 } 646 } 647 648 static void hci_initializing_state_machine(){ 649 // log_info("hci_init: substate %u\n", hci_stack->substate); 650 if (hci_stack->substate % 2) { 651 // odd: waiting for command completion 652 return; 653 } 654 switch (hci_stack->substate >> 1){ 655 case 0: // RESET 656 hci_state_reset(); 657 658 hci_send_cmd(&hci_reset); 659 if (hci_stack->config == NULL || ((hci_uart_config_t *)hci_stack->config)->baudrate_main == 0){ 660 // skip baud change 661 hci_stack->substate = 4; // >> 1 = 2 662 } 663 break; 664 case 1: // SEND BAUD CHANGE 665 hci_stack->control->baudrate_cmd(hci_stack->config, ((hci_uart_config_t *)hci_stack->config)->baudrate_main, hci_stack->hci_packet_buffer); 666 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 667 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 668 break; 669 case 2: // LOCAL BAUD CHANGE 670 log_info("Local baud rate change"); 671 hci_stack->hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack->config)->baudrate_main); 672 hci_stack->substate += 2; 673 // break missing here for fall through 674 675 case 3: 676 log_info("Custom init"); 677 // Custom initialization 678 if (hci_stack->control && hci_stack->control->next_cmd){ 679 int valid_cmd = (*hci_stack->control->next_cmd)(hci_stack->config, hci_stack->hci_packet_buffer); 680 if (valid_cmd){ 681 int size = 3 + hci_stack->hci_packet_buffer[2]; 682 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 683 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 684 hci_stack->substate = 4; // more init commands 685 break; 686 } 687 log_info("hci_run: init script done\n\r"); 688 } 689 // otherwise continue 690 hci_send_cmd(&hci_read_bd_addr); 691 break; 692 case 4: 693 hci_send_cmd(&hci_read_buffer_size); 694 break; 695 case 5: 696 hci_send_cmd(&hci_read_local_supported_features); 697 break; 698 case 6: 699 if (hci_le_supported()){ 700 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 701 } else { 702 // Kensington Bluetoot 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 703 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 704 } 705 706 // skip Classic init commands for LE only chipsets 707 if (!hci_classic_supported()){ 708 if (hci_le_supported()){ 709 hci_stack->substate = 11 << 1; // skip all classic command 710 } else { 711 log_error("Neither BR/EDR nor LE supported"); 712 hci_stack->substate = 14 << 1; // skip all 713 } 714 } 715 break; 716 case 7: 717 if (hci_ssp_supported()){ 718 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 719 break; 720 } 721 hci_stack->substate += 2; 722 // break missing here for fall through 723 724 case 8: 725 // ca. 15 sec 726 hci_send_cmd(&hci_write_page_timeout, 0x6000); 727 break; 728 case 9: 729 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 730 break; 731 case 10: 732 if (hci_stack->local_name){ 733 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 734 } else { 735 char hostname[30]; 736 #ifdef EMBEDDED 737 // BTstack-11:22:33:44:55:66 738 strcpy(hostname, "BTstack "); 739 strcat(hostname, bd_addr_to_str(hci_stack->local_bd_addr)); 740 log_info("---> Name %s", hostname); 741 #else 742 // hostname for POSIX systems 743 gethostname(hostname, 30); 744 hostname[29] = '\0'; 745 #endif 746 hci_send_cmd(&hci_write_local_name, hostname); 747 } 748 break; 749 case 11: 750 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 751 if (!hci_le_supported()){ 752 // SKIP LE init for Classic only configuration 753 hci_stack->substate = 14 << 1; 754 } 755 break; 756 757 #ifdef HAVE_BLE 758 // LE INIT 759 case 12: 760 hci_send_cmd(&hci_le_read_buffer_size); 761 break; 762 case 13: 763 // LE Supported Host = 1, Simultaneous Host = 0 764 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 765 break; 766 case 14: 767 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 768 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 769 break; 770 #endif 771 772 // DONE 773 case 15: 774 // done. 775 hci_stack->state = HCI_STATE_WORKING; 776 hci_emit_state(); 777 break; 778 default: 779 break; 780 } 781 hci_stack->substate++; 782 } 783 784 // avoid huge local variables 785 #ifndef EMBEDDED 786 static device_name_t device_name; 787 #endif 788 static void event_handler(uint8_t *packet, int size){ 789 790 uint16_t event_length = packet[1]; 791 792 // assert packet is complete 793 if (size != event_length + 2){ 794 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 795 return; 796 } 797 798 bd_addr_t addr; 799 bd_addr_type_t addr_type; 800 uint8_t link_type; 801 hci_con_handle_t handle; 802 hci_connection_t * conn; 803 int i; 804 805 // printf("HCI:EVENT:%02x\n", packet[0]); 806 807 switch (packet[0]) { 808 809 case HCI_EVENT_COMMAND_COMPLETE: 810 // get num cmd packets 811 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack->num_cmd_packets, packet[2]); 812 hci_stack->num_cmd_packets = packet[2]; 813 814 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 815 // from offset 5 816 // status 817 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 818 hci_stack->acl_data_packet_length = READ_BT_16(packet, 6); 819 // ignore: SCO data packet len (8) 820 hci_stack->total_num_acl_packets = packet[9]; 821 // ignore: total num SCO packets 822 if (hci_stack->state == HCI_STATE_INITIALIZING){ 823 // determine usable ACL payload size 824 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 825 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 826 } 827 log_info("hci_read_buffer_size: used size %u, count %u\n", 828 hci_stack->acl_data_packet_length, hci_stack->total_num_acl_packets); 829 } 830 } 831 #ifdef HAVE_BLE 832 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 833 hci_stack->le_data_packet_length = READ_BT_16(packet, 6); 834 hci_stack->total_num_le_packets = packet[8]; 835 log_info("hci_le_read_buffer_size: size %u, count %u\n", hci_stack->le_data_packet_length, hci_stack->total_num_le_packets); 836 837 // use LE buffers if no clasic buffers have been reported 838 if (hci_stack->total_num_acl_packets == 0){ 839 log_info("use le buffers instead of classic ones"); 840 hci_stack->total_num_acl_packets = hci_stack->total_num_le_packets; 841 hci_stack->acl_data_packet_length = hci_stack->le_data_packet_length; 842 // determine usable ACL payload size 843 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 844 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 845 } 846 } 847 } 848 #endif 849 // Dump local address 850 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 851 bt_flip_addr(hci_stack->local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 852 log_info("Local Address, Status: 0x%02x: Addr: %s\n", 853 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 854 } 855 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 856 hci_emit_discoverable_enabled(hci_stack->discoverable); 857 } 858 // Note: HCI init checks 859 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 860 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 861 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 862 hci_stack->local_supported_features[0], hci_stack->local_supported_features[1], 863 hci_stack->local_supported_features[2], hci_stack->local_supported_features[3], 864 hci_stack->local_supported_features[4], hci_stack->local_supported_features[5], 865 hci_stack->local_supported_features[6], hci_stack->local_supported_features[7]); 866 867 // determine usable ACL packet types based buffer size and supported features 868 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]); 869 log_info("packet types %04x", hci_stack->packet_types); 870 871 // Classic/LE 872 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 873 } 874 break; 875 876 case HCI_EVENT_COMMAND_STATUS: 877 // get num cmd packets 878 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack->num_cmd_packets, packet[3]); 879 hci_stack->num_cmd_packets = packet[3]; 880 break; 881 882 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 883 int offset = 3; 884 for (i=0; i<packet[2];i++){ 885 handle = READ_BT_16(packet, offset); 886 offset += 2; 887 uint16_t num_packets = READ_BT_16(packet, offset); 888 offset += 2; 889 890 conn = hci_connection_for_handle(handle); 891 if (!conn){ 892 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 893 continue; 894 } 895 conn->num_acl_packets_sent -= num_packets; 896 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 897 } 898 break; 899 } 900 case HCI_EVENT_CONNECTION_REQUEST: 901 bt_flip_addr(addr, &packet[2]); 902 // TODO: eval COD 8-10 903 link_type = packet[11]; 904 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 905 if (link_type == 1) { // ACL 906 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 907 if (!conn) { 908 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 909 } 910 if (!conn) { 911 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 912 hci_stack->decline_reason = 0x0d; 913 BD_ADDR_COPY(hci_stack->decline_addr, addr); 914 break; 915 } 916 conn->state = RECEIVED_CONNECTION_REQUEST; 917 hci_run(); 918 } else { 919 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 920 hci_stack->decline_reason = 0x0a; 921 BD_ADDR_COPY(hci_stack->decline_addr, addr); 922 } 923 break; 924 925 case HCI_EVENT_CONNECTION_COMPLETE: 926 // Connection management 927 bt_flip_addr(addr, &packet[5]); 928 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 929 addr_type = BD_ADDR_TYPE_CLASSIC; 930 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 931 if (conn) { 932 if (!packet[2]){ 933 conn->state = OPEN; 934 conn->con_handle = READ_BT_16(packet, 3); 935 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 936 937 // restart timer 938 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 939 run_loop_add_timer(&conn->timeout); 940 941 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 942 943 hci_emit_nr_connections_changed(); 944 } else { 945 // notify client if dedicated bonding 946 if (conn->bonding_flags & BONDING_DEDICATED){ 947 hci_emit_dedicated_bonding_result(conn, packet[2]); 948 } 949 950 // connection failed, remove entry 951 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 952 btstack_memory_hci_connection_free( conn ); 953 954 // if authentication error, also delete link key 955 if (packet[2] == 0x05) { 956 hci_drop_link_key_for_bd_addr(&addr); 957 } 958 } 959 } 960 break; 961 962 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 963 handle = READ_BT_16(packet, 3); 964 conn = hci_connection_for_handle(handle); 965 if (!conn) break; 966 if (!packet[2]){ 967 uint8_t * features = &packet[5]; 968 if (features[6] & (1 << 3)){ 969 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 970 } 971 } 972 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 973 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x", conn->bonding_flags); 974 if (conn->bonding_flags & BONDING_DEDICATED){ 975 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 976 } 977 break; 978 979 case HCI_EVENT_LINK_KEY_REQUEST: 980 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 981 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 982 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 983 if (hci_stack->bondable && !hci_stack->remote_device_db) break; 984 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 985 hci_run(); 986 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 987 return; 988 989 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 990 bt_flip_addr(addr, &packet[2]); 991 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 992 if (!conn) break; 993 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 994 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 995 // Change Connection Encryption keeps link key type 996 if (link_key_type != CHANGED_COMBINATION_KEY){ 997 conn->link_key_type = link_key_type; 998 } 999 if (!hci_stack->remote_device_db) break; 1000 hci_stack->remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8], conn->link_key_type); 1001 // still forward event to allow dismiss of pairing dialog 1002 break; 1003 } 1004 1005 case HCI_EVENT_PIN_CODE_REQUEST: 1006 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1007 // non-bondable mode: pin code negative reply will be sent 1008 if (!hci_stack->bondable){ 1009 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1010 hci_run(); 1011 return; 1012 } 1013 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1014 if (!hci_stack->remote_device_db) break; 1015 bt_flip_addr(addr, &packet[2]); 1016 hci_stack->remote_device_db->delete_link_key(&addr); 1017 break; 1018 1019 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1020 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1021 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1022 break; 1023 1024 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1025 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1026 if (!hci_stack->ssp_auto_accept) break; 1027 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1028 break; 1029 1030 case HCI_EVENT_USER_PASSKEY_REQUEST: 1031 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1032 if (!hci_stack->ssp_auto_accept) break; 1033 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1034 break; 1035 1036 case HCI_EVENT_ENCRYPTION_CHANGE: 1037 handle = READ_BT_16(packet, 3); 1038 conn = hci_connection_for_handle(handle); 1039 if (!conn) break; 1040 if (packet[2] == 0) { 1041 if (packet[5]){ 1042 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1043 } else { 1044 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1045 } 1046 } 1047 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1048 break; 1049 1050 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1051 handle = READ_BT_16(packet, 3); 1052 conn = hci_connection_for_handle(handle); 1053 if (!conn) break; 1054 1055 // dedicated bonding: send result and disconnect 1056 if (conn->bonding_flags & BONDING_DEDICATED){ 1057 conn->bonding_flags &= ~BONDING_DEDICATED; 1058 hci_emit_dedicated_bonding_result( conn, packet[2]); 1059 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1060 break; 1061 } 1062 1063 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1064 // link key sufficient for requested security 1065 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1066 break; 1067 } 1068 // not enough 1069 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1070 break; 1071 1072 #ifndef EMBEDDED 1073 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1074 if (!hci_stack->remote_device_db) break; 1075 if (packet[2]) break; // status not ok 1076 bt_flip_addr(addr, &packet[3]); 1077 // fix for invalid remote names - terminate on 0xff 1078 for (i=0; i<248;i++){ 1079 if (packet[9+i] == 0xff){ 1080 packet[9+i] = 0; 1081 break; 1082 } 1083 } 1084 memset(&device_name, 0, sizeof(device_name_t)); 1085 strncpy((char*) device_name, (char*) &packet[9], 248); 1086 hci_stack->remote_device_db->put_name(&addr, &device_name); 1087 break; 1088 1089 case HCI_EVENT_INQUIRY_RESULT: 1090 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI:{ 1091 if (!hci_stack->remote_device_db) break; 1092 // first send inq result packet 1093 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1094 // then send cached remote names 1095 int offset = 3; 1096 for (i=0; i<packet[2];i++){ 1097 bt_flip_addr(addr, &packet[offset]); 1098 offset += 14; // 6 + 1 + 1 + 1 + 3 + 2; 1099 if (hci_stack->remote_device_db->get_name(&addr, &device_name)){ 1100 hci_emit_remote_name_cached(&addr, &device_name); 1101 } 1102 } 1103 return; 1104 } 1105 #endif 1106 1107 case HCI_EVENT_DISCONNECTION_COMPLETE: 1108 if (!packet[2]){ 1109 handle = READ_BT_16(packet, 3); 1110 hci_connection_t * conn = hci_connection_for_handle(handle); 1111 if (conn) { 1112 hci_shutdown_connection(conn); 1113 } 1114 } 1115 break; 1116 1117 case HCI_EVENT_HARDWARE_ERROR: 1118 if(hci_stack->control && hci_stack->control->hw_error){ 1119 (*hci_stack->control->hw_error)(); 1120 } else { 1121 // if no special requests, just reboot stack 1122 hci_power_control_off(); 1123 hci_power_control_on(); 1124 } 1125 break; 1126 1127 case DAEMON_EVENT_HCI_PACKET_SENT: 1128 // free packet buffer for asynchronous transport 1129 if (hci_transport_synchronous()) break; 1130 hci_stack->hci_packet_buffer_reserved = 0; 1131 break; 1132 1133 #ifdef HAVE_BLE 1134 case HCI_EVENT_LE_META: 1135 switch (packet[2]){ 1136 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1137 log_info("advertising report received\n"); 1138 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1139 le_handle_advertisement_report(packet, size); 1140 break; 1141 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1142 // Connection management 1143 bt_flip_addr(addr, &packet[8]); 1144 addr_type = (bd_addr_type_t)packet[7]; 1145 log_info("LE Connection_complete (status=%u) type %u, %s\n", packet[3], addr_type, bd_addr_to_str(addr)); 1146 // LE connections are auto-accepted, so just create a connection if there isn't one already 1147 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 1148 if (packet[3]){ 1149 if (conn){ 1150 // outgoing connection failed, remove entry 1151 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1152 btstack_memory_hci_connection_free( conn ); 1153 } 1154 // if authentication error, also delete link key 1155 if (packet[3] == 0x05) { 1156 hci_drop_link_key_for_bd_addr(&addr); 1157 } 1158 break; 1159 } 1160 if (!conn){ 1161 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1162 } 1163 if (!conn){ 1164 // no memory 1165 break; 1166 } 1167 1168 conn->state = OPEN; 1169 conn->con_handle = READ_BT_16(packet, 4); 1170 1171 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1172 1173 // restart timer 1174 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1175 // run_loop_add_timer(&conn->timeout); 1176 1177 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 1178 1179 hci_emit_nr_connections_changed(); 1180 break; 1181 1182 // printf("LE buffer size: %u, count %u\n", READ_BT_16(packet,6), packet[8]); 1183 1184 default: 1185 break; 1186 } 1187 break; 1188 #endif 1189 default: 1190 break; 1191 } 1192 1193 // handle BT initialization 1194 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1195 hci_initializing_event_handler(packet, size); 1196 } 1197 1198 // help with BT sleep 1199 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1200 && hci_stack->substate == 1 1201 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1202 hci_stack->substate++; 1203 } 1204 1205 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1206 1207 // execute main loop 1208 hci_run(); 1209 } 1210 1211 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1212 switch (packet_type) { 1213 case HCI_EVENT_PACKET: 1214 event_handler(packet, size); 1215 break; 1216 case HCI_ACL_DATA_PACKET: 1217 acl_handler(packet, size); 1218 break; 1219 default: 1220 break; 1221 } 1222 } 1223 1224 /** Register HCI packet handlers */ 1225 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1226 hci_stack->packet_handler = handler; 1227 } 1228 1229 static void hci_state_reset(){ 1230 // no connections yet 1231 hci_stack->connections = NULL; 1232 1233 // keep discoverable/connectable as this has been requested by the client(s) 1234 // hci_stack->discoverable = 0; 1235 // hci_stack->connectable = 0; 1236 // hci_stack->bondable = 1; 1237 1238 // buffer is free 1239 hci_stack->hci_packet_buffer_reserved = 0; 1240 1241 // no pending cmds 1242 hci_stack->decline_reason = 0; 1243 hci_stack->new_scan_enable_value = 0xff; 1244 1245 // LE 1246 hci_stack->adv_addr_type = 0; 1247 memset(hci_stack->adv_address, 0, 6); 1248 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1249 hci_stack->le_scan_type = 0xff; 1250 } 1251 1252 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 1253 1254 #ifdef HAVE_MALLOC 1255 if (!hci_stack) { 1256 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1257 } 1258 #else 1259 hci_stack = &hci_stack_static; 1260 #endif 1261 memset(hci_stack, 0, sizeof(hci_stack_t)); 1262 1263 // reference to use transport layer implementation 1264 hci_stack->hci_transport = transport; 1265 1266 // references to used control implementation 1267 hci_stack->control = control; 1268 1269 // reference to used config 1270 hci_stack->config = config; 1271 1272 // higher level handler 1273 hci_stack->packet_handler = dummy_handler; 1274 1275 // store and open remote device db 1276 hci_stack->remote_device_db = remote_device_db; 1277 if (hci_stack->remote_device_db) { 1278 hci_stack->remote_device_db->open(); 1279 } 1280 1281 // max acl payload size defined in config.h 1282 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1283 1284 // register packet handlers with transport 1285 transport->register_packet_handler(&packet_handler); 1286 1287 hci_stack->state = HCI_STATE_OFF; 1288 1289 // class of device 1290 hci_stack->class_of_device = 0x007a020c; // Smartphone 1291 1292 // bondable by default 1293 hci_stack->bondable = 1; 1294 1295 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1296 hci_stack->ssp_enable = 1; 1297 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1298 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1299 hci_stack->ssp_auto_accept = 1; 1300 1301 hci_state_reset(); 1302 } 1303 1304 void hci_close(){ 1305 // close remote device db 1306 if (hci_stack->remote_device_db) { 1307 hci_stack->remote_device_db->close(); 1308 } 1309 while (hci_stack->connections) { 1310 // cancel all l2cap connections 1311 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 1312 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1313 } 1314 hci_power_control(HCI_POWER_OFF); 1315 1316 #ifdef HAVE_MALLOC 1317 free(hci_stack); 1318 #endif 1319 hci_stack = NULL; 1320 } 1321 1322 void hci_set_class_of_device(uint32_t class_of_device){ 1323 hci_stack->class_of_device = class_of_device; 1324 } 1325 1326 void hci_disable_l2cap_timeout_check(){ 1327 disable_l2cap_timeouts = 1; 1328 } 1329 // State-Module-Driver overview 1330 // state module low-level 1331 // HCI_STATE_OFF off close 1332 // HCI_STATE_INITIALIZING, on open 1333 // HCI_STATE_WORKING, on open 1334 // HCI_STATE_HALTING, on open 1335 // HCI_STATE_SLEEPING, off/sleep close 1336 // HCI_STATE_FALLING_ASLEEP on open 1337 1338 static int hci_power_control_on(void){ 1339 1340 // power on 1341 int err = 0; 1342 if (hci_stack->control && hci_stack->control->on){ 1343 err = (*hci_stack->control->on)(hci_stack->config); 1344 } 1345 if (err){ 1346 log_error( "POWER_ON failed\n"); 1347 hci_emit_hci_open_failed(); 1348 return err; 1349 } 1350 1351 // open low-level device 1352 err = hci_stack->hci_transport->open(hci_stack->config); 1353 if (err){ 1354 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1355 if (hci_stack->control && hci_stack->control->off){ 1356 (*hci_stack->control->off)(hci_stack->config); 1357 } 1358 hci_emit_hci_open_failed(); 1359 return err; 1360 } 1361 return 0; 1362 } 1363 1364 static void hci_power_control_off(void){ 1365 1366 log_info("hci_power_control_off\n"); 1367 1368 // close low-level device 1369 hci_stack->hci_transport->close(hci_stack->config); 1370 1371 log_info("hci_power_control_off - hci_transport closed\n"); 1372 1373 // power off 1374 if (hci_stack->control && hci_stack->control->off){ 1375 (*hci_stack->control->off)(hci_stack->config); 1376 } 1377 1378 log_info("hci_power_control_off - control closed\n"); 1379 1380 hci_stack->state = HCI_STATE_OFF; 1381 } 1382 1383 static void hci_power_control_sleep(void){ 1384 1385 log_info("hci_power_control_sleep\n"); 1386 1387 #if 0 1388 // don't close serial port during sleep 1389 1390 // close low-level device 1391 hci_stack->hci_transport->close(hci_stack->config); 1392 #endif 1393 1394 // sleep mode 1395 if (hci_stack->control && hci_stack->control->sleep){ 1396 (*hci_stack->control->sleep)(hci_stack->config); 1397 } 1398 1399 hci_stack->state = HCI_STATE_SLEEPING; 1400 } 1401 1402 static int hci_power_control_wake(void){ 1403 1404 log_info("hci_power_control_wake\n"); 1405 1406 // wake on 1407 if (hci_stack->control && hci_stack->control->wake){ 1408 (*hci_stack->control->wake)(hci_stack->config); 1409 } 1410 1411 #if 0 1412 // open low-level device 1413 int err = hci_stack->hci_transport->open(hci_stack->config); 1414 if (err){ 1415 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1416 if (hci_stack->control && hci_stack->control->off){ 1417 (*hci_stack->control->off)(hci_stack->config); 1418 } 1419 hci_emit_hci_open_failed(); 1420 return err; 1421 } 1422 #endif 1423 1424 return 0; 1425 } 1426 1427 static void hci_power_transition_to_initializing(void){ 1428 // set up state machine 1429 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1430 hci_stack->hci_packet_buffer_reserved = 0; 1431 hci_stack->state = HCI_STATE_INITIALIZING; 1432 hci_stack->substate = 0; 1433 } 1434 1435 int hci_power_control(HCI_POWER_MODE power_mode){ 1436 1437 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack->state); 1438 1439 int err = 0; 1440 switch (hci_stack->state){ 1441 1442 case HCI_STATE_OFF: 1443 switch (power_mode){ 1444 case HCI_POWER_ON: 1445 err = hci_power_control_on(); 1446 if (err) { 1447 log_error("hci_power_control_on() error %u", err); 1448 return err; 1449 } 1450 hci_power_transition_to_initializing(); 1451 break; 1452 case HCI_POWER_OFF: 1453 // do nothing 1454 break; 1455 case HCI_POWER_SLEEP: 1456 // do nothing (with SLEEP == OFF) 1457 break; 1458 } 1459 break; 1460 1461 case HCI_STATE_INITIALIZING: 1462 switch (power_mode){ 1463 case HCI_POWER_ON: 1464 // do nothing 1465 break; 1466 case HCI_POWER_OFF: 1467 // no connections yet, just turn it off 1468 hci_power_control_off(); 1469 break; 1470 case HCI_POWER_SLEEP: 1471 // no connections yet, just turn it off 1472 hci_power_control_sleep(); 1473 break; 1474 } 1475 break; 1476 1477 case HCI_STATE_WORKING: 1478 switch (power_mode){ 1479 case HCI_POWER_ON: 1480 // do nothing 1481 break; 1482 case HCI_POWER_OFF: 1483 // see hci_run 1484 hci_stack->state = HCI_STATE_HALTING; 1485 break; 1486 case HCI_POWER_SLEEP: 1487 // see hci_run 1488 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1489 hci_stack->substate = 0; 1490 break; 1491 } 1492 break; 1493 1494 case HCI_STATE_HALTING: 1495 switch (power_mode){ 1496 case HCI_POWER_ON: 1497 hci_power_transition_to_initializing(); 1498 break; 1499 case HCI_POWER_OFF: 1500 // do nothing 1501 break; 1502 case HCI_POWER_SLEEP: 1503 // see hci_run 1504 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1505 hci_stack->substate = 0; 1506 break; 1507 } 1508 break; 1509 1510 case HCI_STATE_FALLING_ASLEEP: 1511 switch (power_mode){ 1512 case HCI_POWER_ON: 1513 1514 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1515 // nothing to do, if H4 supports power management 1516 if (bt_control_iphone_power_management_enabled()){ 1517 hci_stack->state = HCI_STATE_INITIALIZING; 1518 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1519 break; 1520 } 1521 #endif 1522 hci_power_transition_to_initializing(); 1523 break; 1524 case HCI_POWER_OFF: 1525 // see hci_run 1526 hci_stack->state = HCI_STATE_HALTING; 1527 break; 1528 case HCI_POWER_SLEEP: 1529 // do nothing 1530 break; 1531 } 1532 break; 1533 1534 case HCI_STATE_SLEEPING: 1535 switch (power_mode){ 1536 case HCI_POWER_ON: 1537 1538 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1539 // nothing to do, if H4 supports power management 1540 if (bt_control_iphone_power_management_enabled()){ 1541 hci_stack->state = HCI_STATE_INITIALIZING; 1542 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1543 hci_update_scan_enable(); 1544 break; 1545 } 1546 #endif 1547 err = hci_power_control_wake(); 1548 if (err) return err; 1549 hci_power_transition_to_initializing(); 1550 break; 1551 case HCI_POWER_OFF: 1552 hci_stack->state = HCI_STATE_HALTING; 1553 break; 1554 case HCI_POWER_SLEEP: 1555 // do nothing 1556 break; 1557 } 1558 break; 1559 } 1560 1561 // create internal event 1562 hci_emit_state(); 1563 1564 // trigger next/first action 1565 hci_run(); 1566 1567 return 0; 1568 } 1569 1570 static void hci_update_scan_enable(void){ 1571 // 2 = page scan, 1 = inq scan 1572 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 1573 hci_run(); 1574 } 1575 1576 void hci_discoverable_control(uint8_t enable){ 1577 if (enable) enable = 1; // normalize argument 1578 1579 if (hci_stack->discoverable == enable){ 1580 hci_emit_discoverable_enabled(hci_stack->discoverable); 1581 return; 1582 } 1583 1584 hci_stack->discoverable = enable; 1585 hci_update_scan_enable(); 1586 } 1587 1588 void hci_connectable_control(uint8_t enable){ 1589 if (enable) enable = 1; // normalize argument 1590 1591 // don't emit event 1592 if (hci_stack->connectable == enable) return; 1593 1594 hci_stack->connectable = enable; 1595 hci_update_scan_enable(); 1596 } 1597 1598 bd_addr_t * hci_local_bd_addr(void){ 1599 return &hci_stack->local_bd_addr; 1600 } 1601 1602 void hci_run(){ 1603 1604 hci_connection_t * connection; 1605 linked_item_t * it; 1606 1607 if (!hci_can_send_command_packet_now()) return; 1608 1609 // global/non-connection oriented commands 1610 1611 // decline incoming connections 1612 if (hci_stack->decline_reason){ 1613 uint8_t reason = hci_stack->decline_reason; 1614 hci_stack->decline_reason = 0; 1615 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 1616 return; 1617 } 1618 1619 // send scan enable 1620 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 1621 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1622 hci_stack->new_scan_enable_value = 0xff; 1623 return; 1624 } 1625 1626 #ifdef HAVE_BLE 1627 // handle le scan 1628 if (hci_stack->state == HCI_STATE_WORKING){ 1629 switch(hci_stack->le_scanning_state){ 1630 case LE_START_SCAN: 1631 hci_stack->le_scanning_state = LE_SCANNING; 1632 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 1633 return; 1634 1635 case LE_STOP_SCAN: 1636 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1637 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 1638 return; 1639 default: 1640 break; 1641 } 1642 if (hci_stack->le_scan_type != 0xff){ 1643 // defaults: active scanning, accept all advertisement packets 1644 int scan_type = hci_stack->le_scan_type; 1645 hci_stack->le_scan_type = 0xff; 1646 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); 1647 return; 1648 } 1649 } 1650 #endif 1651 1652 // send pending HCI commands 1653 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 1654 connection = (hci_connection_t *) it; 1655 1656 switch(connection->state){ 1657 case SEND_CREATE_CONNECTION: 1658 switch(connection->address_type){ 1659 case BD_ADDR_TYPE_CLASSIC: 1660 log_info("sending hci_create_connection\n"); 1661 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 1662 break; 1663 default: 1664 #ifdef HAVE_BLE 1665 log_info("sending hci_le_create_connection\n"); 1666 hci_send_cmd(&hci_le_create_connection, 1667 0x0060, // scan interval: 60 ms 1668 0x0030, // scan interval: 30 ms 1669 0, // don't use whitelist 1670 connection->address_type, // peer address type 1671 connection->address, // peer bd addr 1672 hci_stack->adv_addr_type, // our addr type: 1673 0x0008, // conn interval min 1674 0x0018, // conn interval max 1675 0, // conn latency 1676 0x0048, // supervision timeout 1677 0x0001, // min ce length 1678 0x0001 // max ce length 1679 ); 1680 1681 connection->state = SENT_CREATE_CONNECTION; 1682 #endif 1683 break; 1684 } 1685 return; 1686 1687 case RECEIVED_CONNECTION_REQUEST: 1688 log_info("sending hci_accept_connection_request\n"); 1689 connection->state = ACCEPTED_CONNECTION_REQUEST; 1690 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1691 return; 1692 1693 #ifdef HAVE_BLE 1694 case SEND_CANCEL_CONNECTION: 1695 connection->state = SENT_CANCEL_CONNECTION; 1696 hci_send_cmd(&hci_le_create_connection_cancel); 1697 return; 1698 #endif 1699 case SEND_DISCONNECT: 1700 connection->state = SENT_DISCONNECT; 1701 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1702 return; 1703 1704 default: 1705 break; 1706 } 1707 1708 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1709 log_info("responding to link key request\n"); 1710 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1711 link_key_t link_key; 1712 link_key_type_t link_key_type; 1713 if ( hci_stack->remote_device_db 1714 && hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type) 1715 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 1716 connection->link_key_type = link_key_type; 1717 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1718 } else { 1719 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1720 } 1721 return; 1722 } 1723 1724 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 1725 log_info("denying to pin request\n"); 1726 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 1727 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 1728 return; 1729 } 1730 1731 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1732 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1733 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 1734 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 1735 // tweak authentication requirements 1736 uint8_t authreq = hci_stack->ssp_authentication_requirement; 1737 if (connection->bonding_flags & BONDING_DEDICATED){ 1738 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 1739 } 1740 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 1741 authreq |= 1; 1742 } 1743 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 1744 } else { 1745 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 1746 } 1747 return; 1748 } 1749 1750 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1751 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1752 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1753 return; 1754 } 1755 1756 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1757 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1758 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1759 return; 1760 } 1761 1762 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 1763 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 1764 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 1765 return; 1766 } 1767 1768 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 1769 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 1770 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 1771 return; 1772 } 1773 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 1774 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 1775 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 1776 return; 1777 } 1778 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 1779 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 1780 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 1781 return; 1782 } 1783 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 1784 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 1785 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 1786 return; 1787 } 1788 } 1789 1790 switch (hci_stack->state){ 1791 case HCI_STATE_INITIALIZING: 1792 hci_initializing_state_machine(); 1793 break; 1794 1795 case HCI_STATE_HALTING: 1796 1797 log_info("HCI_STATE_HALTING\n"); 1798 // close all open connections 1799 connection = (hci_connection_t *) hci_stack->connections; 1800 if (connection){ 1801 1802 // send disconnect 1803 if (!hci_can_send_command_packet_now()) return; 1804 1805 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1806 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1807 1808 // send disconnected event right away - causes higher layer connections to get closed, too. 1809 hci_shutdown_connection(connection); 1810 return; 1811 } 1812 log_info("HCI_STATE_HALTING, calling off\n"); 1813 1814 // switch mode 1815 hci_power_control_off(); 1816 1817 log_info("HCI_STATE_HALTING, emitting state\n"); 1818 hci_emit_state(); 1819 log_info("HCI_STATE_HALTING, done\n"); 1820 break; 1821 1822 case HCI_STATE_FALLING_ASLEEP: 1823 switch(hci_stack->substate) { 1824 case 0: 1825 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1826 // close all open connections 1827 connection = (hci_connection_t *) hci_stack->connections; 1828 1829 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1830 // don't close connections, if H4 supports power management 1831 if (bt_control_iphone_power_management_enabled()){ 1832 connection = NULL; 1833 } 1834 #endif 1835 if (connection){ 1836 1837 // send disconnect 1838 if (!hci_can_send_command_packet_now()) return; 1839 1840 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1841 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1842 1843 // send disconnected event right away - causes higher layer connections to get closed, too. 1844 hci_shutdown_connection(connection); 1845 return; 1846 } 1847 1848 if (hci_classic_supported()){ 1849 // disable page and inquiry scan 1850 if (!hci_can_send_command_packet_now()) return; 1851 1852 log_info("HCI_STATE_HALTING, disabling inq scans\n"); 1853 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 1854 1855 // continue in next sub state 1856 hci_stack->substate++; 1857 break; 1858 } 1859 // fall through for ble-only chips 1860 1861 case 2: 1862 log_info("HCI_STATE_HALTING, calling sleep\n"); 1863 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1864 // don't actually go to sleep, if H4 supports power management 1865 if (bt_control_iphone_power_management_enabled()){ 1866 // SLEEP MODE reached 1867 hci_stack->state = HCI_STATE_SLEEPING; 1868 hci_emit_state(); 1869 break; 1870 } 1871 #endif 1872 // switch mode 1873 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 1874 hci_emit_state(); 1875 break; 1876 1877 default: 1878 break; 1879 } 1880 break; 1881 1882 default: 1883 break; 1884 } 1885 } 1886 1887 int hci_send_cmd_packet(uint8_t *packet, int size){ 1888 bd_addr_t addr; 1889 hci_connection_t * conn; 1890 // house-keeping 1891 1892 // create_connection? 1893 if (IS_COMMAND(packet, hci_create_connection)){ 1894 bt_flip_addr(addr, &packet[3]); 1895 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1896 1897 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1898 if (!conn){ 1899 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1900 if (!conn){ 1901 // notify client that alloc failed 1902 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1903 return 0; // don't sent packet to controller 1904 } 1905 conn->state = SEND_CREATE_CONNECTION; 1906 } 1907 log_info("conn state %u", conn->state); 1908 switch (conn->state){ 1909 // if connection active exists 1910 case OPEN: 1911 // and OPEN, emit connection complete command, don't send to controller 1912 hci_emit_connection_complete(conn, 0); 1913 return 0; 1914 case SEND_CREATE_CONNECTION: 1915 // connection created by hci, e.g. dedicated bonding 1916 break; 1917 default: 1918 // otherwise, just ignore as it is already in the open process 1919 return 0; 1920 } 1921 conn->state = SENT_CREATE_CONNECTION; 1922 } 1923 1924 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1925 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1926 } 1927 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1928 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1929 } 1930 1931 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1932 if (hci_stack->remote_device_db){ 1933 bt_flip_addr(addr, &packet[3]); 1934 hci_stack->remote_device_db->delete_link_key(&addr); 1935 } 1936 } 1937 1938 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 1939 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 1940 bt_flip_addr(addr, &packet[3]); 1941 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1942 if (conn){ 1943 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 1944 } 1945 } 1946 1947 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 1948 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 1949 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 1950 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 1951 bt_flip_addr(addr, &packet[3]); 1952 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1953 if (conn){ 1954 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 1955 } 1956 } 1957 1958 #ifdef HAVE_BLE 1959 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 1960 hci_stack->adv_addr_type = packet[8]; 1961 } 1962 if (IS_COMMAND(packet, hci_le_set_random_address)){ 1963 bt_flip_addr(hci_stack->adv_address, &packet[3]); 1964 } 1965 #endif 1966 1967 hci_stack->num_cmd_packets--; 1968 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1969 1970 // free packet buffer for synchronous transport implementations 1971 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 1972 hci_stack->hci_packet_buffer_reserved = 0; 1973 } 1974 1975 return err; 1976 } 1977 1978 // disconnect because of security block 1979 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 1980 hci_connection_t * connection = hci_connection_for_handle(con_handle); 1981 if (!connection) return; 1982 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 1983 } 1984 1985 1986 // Configure Secure Simple Pairing 1987 1988 // enable will enable SSP during init 1989 void hci_ssp_set_enable(int enable){ 1990 hci_stack->ssp_enable = enable; 1991 } 1992 1993 int hci_local_ssp_activated(){ 1994 return hci_ssp_supported() && hci_stack->ssp_enable; 1995 } 1996 1997 // if set, BTstack will respond to io capability request using authentication requirement 1998 void hci_ssp_set_io_capability(int io_capability){ 1999 hci_stack->ssp_io_capability = io_capability; 2000 } 2001 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 2002 hci_stack->ssp_authentication_requirement = authentication_requirement; 2003 } 2004 2005 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 2006 void hci_ssp_set_auto_accept(int auto_accept){ 2007 hci_stack->ssp_auto_accept = auto_accept; 2008 } 2009 2010 /** 2011 * pre: numcmds >= 0 - it's allowed to send a command to the controller 2012 */ 2013 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 2014 2015 if (!hci_can_send_command_packet_now()){ 2016 log_error("hci_send_cmd called but cannot send packet now"); 2017 return 0; 2018 } 2019 2020 // for HCI INITIALIZATION 2021 // printf("hci_send_cmd: opcode %04x\n", cmd->opcode); 2022 hci_stack->last_cmd_opcode = cmd->opcode; 2023 2024 hci_reserve_packet_buffer(); 2025 uint8_t * packet = hci_stack->hci_packet_buffer; 2026 2027 va_list argptr; 2028 va_start(argptr, cmd); 2029 uint16_t size = hci_create_cmd_internal(packet, cmd, argptr); 2030 va_end(argptr); 2031 2032 return hci_send_cmd_packet(packet, size); 2033 } 2034 2035 // Create various non-HCI events. 2036 // TODO: generalize, use table similar to hci_create_command 2037 2038 void hci_emit_state(){ 2039 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 2040 uint8_t event[3]; 2041 event[0] = BTSTACK_EVENT_STATE; 2042 event[1] = sizeof(event) - 2; 2043 event[2] = hci_stack->state; 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 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 2049 uint8_t event[13]; 2050 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 2051 event[1] = sizeof(event) - 2; 2052 event[2] = status; 2053 bt_store_16(event, 3, conn->con_handle); 2054 bt_flip_addr(&event[5], conn->address); 2055 event[11] = 1; // ACL connection 2056 event[12] = 0; // encryption disabled 2057 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2058 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2059 } 2060 2061 void hci_emit_le_connection_complete(hci_connection_t *conn, uint8_t status){ 2062 uint8_t event[21]; 2063 event[0] = HCI_EVENT_LE_META; 2064 event[1] = sizeof(event) - 2; 2065 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 2066 event[3] = status; 2067 bt_store_16(event, 4, conn->con_handle); 2068 event[6] = 0; // TODO: role 2069 event[7] = conn->address_type; 2070 bt_flip_addr(&event[8], conn->address); 2071 bt_store_16(event, 14, 0); // interval 2072 bt_store_16(event, 16, 0); // latency 2073 bt_store_16(event, 18, 0); // supervision timeout 2074 event[20] = 0; // master clock accuracy 2075 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2076 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2077 } 2078 2079 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 2080 uint8_t event[6]; 2081 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 2082 event[1] = sizeof(event) - 2; 2083 event[2] = 0; // status = OK 2084 bt_store_16(event, 3, handle); 2085 event[5] = reason; 2086 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2087 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2088 } 2089 2090 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 2091 if (disable_l2cap_timeouts) return; 2092 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 2093 uint8_t event[4]; 2094 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 2095 event[1] = sizeof(event) - 2; 2096 bt_store_16(event, 2, conn->con_handle); 2097 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2098 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2099 } 2100 2101 void hci_emit_nr_connections_changed(){ 2102 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 2103 uint8_t event[3]; 2104 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 2105 event[1] = sizeof(event) - 2; 2106 event[2] = nr_hci_connections(); 2107 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2108 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2109 } 2110 2111 void hci_emit_hci_open_failed(){ 2112 log_info("BTSTACK_EVENT_POWERON_FAILED"); 2113 uint8_t event[2]; 2114 event[0] = BTSTACK_EVENT_POWERON_FAILED; 2115 event[1] = sizeof(event) - 2; 2116 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2117 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2118 } 2119 2120 #ifndef EMBEDDED 2121 void hci_emit_btstack_version() { 2122 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 2123 uint8_t event[6]; 2124 event[0] = BTSTACK_EVENT_VERSION; 2125 event[1] = sizeof(event) - 2; 2126 event[2] = BTSTACK_MAJOR; 2127 event[3] = BTSTACK_MINOR; 2128 bt_store_16(event, 4, BTSTACK_REVISION); 2129 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2130 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2131 } 2132 #endif 2133 2134 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 2135 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 2136 uint8_t event[3]; 2137 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 2138 event[1] = sizeof(event) - 2; 2139 event[2] = enabled; 2140 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2141 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2142 } 2143 2144 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 2145 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 2146 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 2147 event[1] = sizeof(event) - 2 - 1; 2148 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 2149 bt_flip_addr(&event[3], *addr); 2150 memcpy(&event[9], name, 248); 2151 2152 event[9+248] = 0; // assert \0 for log_info 2153 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 2154 2155 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 2156 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 2157 } 2158 2159 void hci_emit_discoverable_enabled(uint8_t enabled){ 2160 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 2161 uint8_t event[3]; 2162 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 2163 event[1] = sizeof(event) - 2; 2164 event[2] = enabled; 2165 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2166 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2167 } 2168 2169 void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 2170 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 2171 uint8_t event[5]; 2172 int pos = 0; 2173 event[pos++] = GAP_SECURITY_LEVEL; 2174 event[pos++] = sizeof(event) - 2; 2175 bt_store_16(event, 2, con_handle); 2176 pos += 2; 2177 event[pos++] = level; 2178 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2179 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2180 } 2181 2182 void hci_emit_dedicated_bonding_result(hci_connection_t * connection, uint8_t status){ 2183 log_info("hci_emit_dedicated_bonding_result %u ", status); 2184 uint8_t event[9]; 2185 int pos = 0; 2186 event[pos++] = GAP_DEDICATED_BONDING_COMPLETED; 2187 event[pos++] = sizeof(event) - 2; 2188 event[pos++] = status; 2189 bt_flip_addr( * (bd_addr_t *) &event[pos], connection->address); 2190 pos += 6; 2191 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2192 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2193 } 2194 2195 // query if remote side supports SSP 2196 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 2197 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2198 if (!connection) return 0; 2199 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 2200 } 2201 2202 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 2203 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 2204 } 2205 2206 // GAP API 2207 /** 2208 * @bbrief enable/disable bonding. default is enabled 2209 * @praram enabled 2210 */ 2211 void gap_set_bondable_mode(int enable){ 2212 hci_stack->bondable = enable ? 1 : 0; 2213 } 2214 2215 /** 2216 * @brief map link keys to security levels 2217 */ 2218 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 2219 switch (link_key_type){ 2220 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 2221 return LEVEL_4; 2222 case COMBINATION_KEY: 2223 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 2224 return LEVEL_3; 2225 default: 2226 return LEVEL_2; 2227 } 2228 } 2229 2230 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 2231 if (!connection) return LEVEL_0; 2232 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 2233 return gap_security_level_for_link_key_type(connection->link_key_type); 2234 } 2235 2236 2237 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 2238 log_info("gap_mitm_protection_required_for_security_level %u", level); 2239 return level > LEVEL_2; 2240 } 2241 2242 /** 2243 * @brief get current security level 2244 */ 2245 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 2246 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2247 if (!connection) return LEVEL_0; 2248 return gap_security_level_for_connection(connection); 2249 } 2250 2251 /** 2252 * @brief request connection to device to 2253 * @result GAP_AUTHENTICATION_RESULT 2254 */ 2255 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 2256 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2257 if (!connection){ 2258 hci_emit_security_level(con_handle, LEVEL_0); 2259 return; 2260 } 2261 gap_security_level_t current_level = gap_security_level(con_handle); 2262 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 2263 if (current_level >= requested_level){ 2264 hci_emit_security_level(con_handle, current_level); 2265 return; 2266 } 2267 2268 connection->requested_security_level = requested_level; 2269 2270 // would enabling ecnryption suffice (>= LEVEL_2)? 2271 if (hci_stack->remote_device_db){ 2272 link_key_type_t link_key_type; 2273 link_key_t link_key; 2274 if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 2275 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 2276 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2277 return; 2278 } 2279 } 2280 } 2281 2282 // try to authenticate connection 2283 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2284 hci_run(); 2285 } 2286 2287 /** 2288 * @brief start dedicated bonding with device. disconnect after bonding 2289 * @param device 2290 * @param request MITM protection 2291 * @result GAP_DEDICATED_BONDING_COMPLETE 2292 */ 2293 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 2294 2295 // create connection state machine 2296 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 2297 2298 if (!connection){ 2299 return BTSTACK_MEMORY_ALLOC_FAILED; 2300 } 2301 2302 // delete linkn key 2303 hci_drop_link_key_for_bd_addr( (bd_addr_t *) &device); 2304 2305 // configure LEVEL_2/3, dedicated bonding 2306 connection->state = SEND_CREATE_CONNECTION; 2307 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 2308 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 2309 connection->bonding_flags = BONDING_DEDICATED; 2310 2311 // wait for GAP Security Result and send GAP Dedicated Bonding complete 2312 2313 // handle: connnection failure (connection complete != ok) 2314 // handle: authentication failure 2315 // handle: disconnect on done 2316 2317 hci_run(); 2318 2319 return 0; 2320 } 2321 2322 void gap_set_local_name(const char * local_name){ 2323 hci_stack->local_name = local_name; 2324 } 2325 2326 le_command_status_t le_central_start_scan(){ 2327 if (hci_stack->le_scanning_state == LE_SCANNING) return BLE_PERIPHERAL_OK; 2328 hci_stack->le_scanning_state = LE_START_SCAN; 2329 hci_run(); 2330 return BLE_PERIPHERAL_OK; 2331 } 2332 2333 le_command_status_t le_central_stop_scan(){ 2334 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return BLE_PERIPHERAL_OK; 2335 hci_stack->le_scanning_state = LE_STOP_SCAN; 2336 hci_run(); 2337 return BLE_PERIPHERAL_OK; 2338 } 2339 2340 void le_central_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 2341 hci_stack->le_scan_type = scan_type; 2342 hci_stack->le_scan_interval = scan_interval; 2343 hci_stack->le_scan_window = scan_window; 2344 hci_run(); 2345 } 2346 2347 le_command_status_t le_central_connect(bd_addr_t * addr, bd_addr_type_t addr_type){ 2348 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2349 if (!conn){ 2350 log_info("le_central_connect: no connection exists yet, creating context"); 2351 conn = create_connection_for_bd_addr_and_type(*addr, addr_type); 2352 if (!conn){ 2353 // notify client that alloc failed 2354 hci_emit_le_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2355 log_info("le_central_connect: failed to alloc context"); 2356 return BLE_PERIPHERAL_NOT_CONNECTED; // don't sent packet to controller 2357 } 2358 conn->state = SEND_CREATE_CONNECTION; 2359 log_info("le_central_connect: send create connection next"); 2360 hci_run(); 2361 return BLE_PERIPHERAL_OK; 2362 } 2363 2364 if (!hci_is_le_connection(conn) || 2365 conn->state == SEND_CREATE_CONNECTION || 2366 conn->state == SENT_CREATE_CONNECTION) { 2367 hci_emit_le_connection_complete(conn, ERROR_CODE_COMMAND_DISALLOWED); 2368 log_error("le_central_connect: classic connection or connect is already being created"); 2369 return BLE_PERIPHERAL_IN_WRONG_STATE; 2370 } 2371 2372 log_info("le_central_connect: context exists with state %u", conn->state); 2373 hci_emit_le_connection_complete(conn, 0); 2374 hci_run(); 2375 return BLE_PERIPHERAL_OK; 2376 } 2377 2378 // @assumption: only a single outgoing LE Connection exists 2379 static hci_connection_t * le_central_get_outgoing_connection(){ 2380 linked_item_t *it; 2381 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 2382 hci_connection_t * conn = (hci_connection_t *) it; 2383 if (!hci_is_le_connection(conn)) continue; 2384 switch (conn->state){ 2385 case SEND_CREATE_CONNECTION: 2386 case SENT_CREATE_CONNECTION: 2387 return conn; 2388 default: 2389 break; 2390 }; 2391 } 2392 return NULL; 2393 } 2394 2395 le_command_status_t le_central_connect_cancel(){ 2396 hci_connection_t * conn = le_central_get_outgoing_connection(); 2397 switch (conn->state){ 2398 case SEND_CREATE_CONNECTION: 2399 // skip sending create connection and emit event instead 2400 hci_emit_le_connection_complete(conn, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 2401 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 2402 btstack_memory_hci_connection_free( conn ); 2403 break; 2404 case SENT_CREATE_CONNECTION: 2405 // request to send cancel connection 2406 conn->state = SEND_CANCEL_CONNECTION; 2407 hci_run(); 2408 break; 2409 default: 2410 break; 2411 } 2412 return BLE_PERIPHERAL_OK; 2413 } 2414 2415 le_command_status_t gap_disconnect(hci_con_handle_t handle){ 2416 hci_connection_t * conn = hci_connection_for_handle(handle); 2417 if (!conn){ 2418 hci_emit_disconnection_complete(handle, 0); 2419 return BLE_PERIPHERAL_OK; 2420 } 2421 conn->state = SEND_DISCONNECT; 2422 hci_run(); 2423 return BLE_PERIPHERAL_OK; 2424 } 2425 2426 void hci_disconnect_all(){ 2427 linked_list_iterator_t it; 2428 linked_list_iterator_init(&it, &hci_stack->connections); 2429 while (linked_list_iterator_has_next(&it)){ 2430 hci_connection_t * con = (hci_connection_t*) linked_list_iterator_next(&it); 2431 if (con->state == SENT_DISCONNECT) continue; 2432 con->state = SEND_DISCONNECT; 2433 } 2434 hci_run(); 2435 } 2436