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 77 // the STACK is here 78 #ifndef HAVE_MALLOC 79 static hci_stack_t hci_stack_static; 80 #endif 81 static hci_stack_t * hci_stack = NULL; 82 83 // test helper 84 static uint8_t disable_l2cap_timeouts = 0; 85 86 /** 87 * create connection for given address 88 * 89 * @return connection OR NULL, if no memory left 90 */ 91 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 92 93 printf("create_connection_for_addr %s\n", bd_addr_to_str(addr)); 94 hci_connection_t * conn = (hci_connection_t *) btstack_memory_hci_connection_get(); 95 if (!conn) return NULL; 96 BD_ADDR_COPY(conn->address, addr); 97 conn->address_type = addr_type; 98 conn->con_handle = 0xffff; 99 conn->authentication_flags = AUTH_FLAGS_NONE; 100 conn->bonding_flags = 0; 101 conn->requested_security_level = LEVEL_0; 102 linked_item_set_user(&conn->timeout.item, conn); 103 conn->timeout.process = hci_connection_timeout_handler; 104 hci_connection_timestamp(conn); 105 conn->acl_recombination_length = 0; 106 conn->acl_recombination_pos = 0; 107 conn->num_acl_packets_sent = 0; 108 linked_list_add(&hci_stack->connections, (linked_item_t *) conn); 109 return conn; 110 } 111 112 /** 113 * get connection for a given handle 114 * 115 * @return connection OR NULL, if not found 116 */ 117 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 118 linked_item_t *it; 119 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 120 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 121 return (hci_connection_t *) it; 122 } 123 } 124 return NULL; 125 } 126 127 /** 128 * get connection for given address 129 * 130 * @return connection OR NULL, if not found 131 */ 132 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t * addr, bd_addr_type_t addr_type){ 133 linked_item_t *it; 134 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 135 hci_connection_t * connection = (hci_connection_t *) it; 136 if (connection->address_type != addr_type) continue; 137 if (memcmp(addr, connection->address, 6) != 0) continue; 138 return connection; 139 } 140 return NULL; 141 } 142 143 static void hci_connection_timeout_handler(timer_source_t *timer){ 144 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 145 #ifdef HAVE_TIME 146 struct timeval tv; 147 gettimeofday(&tv, NULL); 148 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 149 // connections might be timed out 150 hci_emit_l2cap_check_timeout(connection); 151 } 152 #endif 153 #ifdef HAVE_TICK 154 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 155 // connections might be timed out 156 hci_emit_l2cap_check_timeout(connection); 157 } 158 #endif 159 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 160 run_loop_add_timer(timer); 161 } 162 163 static void hci_connection_timestamp(hci_connection_t *connection){ 164 #ifdef HAVE_TIME 165 gettimeofday(&connection->timestamp, NULL); 166 #endif 167 #ifdef HAVE_TICK 168 connection->timestamp = embedded_get_ticks(); 169 #endif 170 } 171 172 173 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 174 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 175 } 176 177 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 178 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 179 } 180 181 182 /** 183 * add authentication flags and reset timer 184 * @note: assumes classic connection 185 */ 186 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 187 bd_addr_t addr; 188 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 189 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 190 if (conn) { 191 connectionSetAuthenticationFlags(conn, flags); 192 hci_connection_timestamp(conn); 193 } 194 } 195 196 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 197 hci_connection_t * conn = hci_connection_for_handle(handle); 198 if (!conn) return 0; 199 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 200 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 201 return 0; 202 } 203 204 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 205 if (hci_stack->remote_device_db) { 206 hci_stack->remote_device_db->delete_link_key(addr); 207 } 208 } 209 210 211 /** 212 * count connections 213 */ 214 static int nr_hci_connections(void){ 215 int count = 0; 216 linked_item_t *it; 217 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 218 return count; 219 } 220 221 /** 222 * Dummy handler called by HCI 223 */ 224 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 225 } 226 227 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 228 hci_connection_t * connection = hci_connection_for_handle(handle); 229 if (!connection) { 230 log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 231 return 0; 232 } 233 return connection->num_acl_packets_sent; 234 } 235 236 uint8_t hci_number_free_acl_slots(){ 237 uint8_t free_slots = hci_stack->total_num_acl_packets; 238 linked_item_t *it; 239 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 240 hci_connection_t * connection = (hci_connection_t *) it; 241 if (free_slots < connection->num_acl_packets_sent) { 242 log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 243 return 0; 244 } 245 free_slots -= connection->num_acl_packets_sent; 246 } 247 return free_slots; 248 } 249 250 int hci_can_send_packet_now(uint8_t packet_type){ 251 252 // check for async hci transport implementations 253 if (hci_stack->hci_transport->can_send_packet_now){ 254 if (!hci_stack->hci_transport->can_send_packet_now(packet_type)){ 255 return 0; 256 } 257 } 258 259 // check regular Bluetooth flow control 260 switch (packet_type) { 261 case HCI_ACL_DATA_PACKET: 262 return hci_number_free_acl_slots(); 263 case HCI_COMMAND_DATA_PACKET: 264 return hci_stack->num_cmd_packets; 265 default: 266 return 0; 267 } 268 } 269 270 // same as hci_can_send_packet_now, but also checks if packet buffer is free for use 271 int hci_can_send_packet_now_using_packet_buffer(uint8_t packet_type){ 272 if (hci_stack->hci_packet_buffer_reserved) return 0; 273 return hci_can_send_packet_now(packet_type); 274 } 275 276 // used for internal checks in l2cap[-le].c 277 int hci_is_packet_buffer_reserved(void){ 278 return hci_stack->hci_packet_buffer_reserved; 279 } 280 281 // reserves outgoing packet buffer. @returns 1 if successful 282 int hci_reserve_packet_buffer(void){ 283 if (hci_stack->hci_packet_buffer_reserved) return 0; 284 hci_stack->hci_packet_buffer_reserved = 1; 285 return 1; 286 } 287 288 void hci_release_packet_buffer(void){ 289 hci_stack->hci_packet_buffer_reserved = 0; 290 } 291 292 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 293 int hci_transport_synchronous(void){ 294 return hci_stack->hci_transport->can_send_packet_now == NULL; 295 } 296 297 int hci_send_acl_packet(uint8_t *packet, int size){ 298 299 // check for free places on BT module 300 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 301 302 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 303 hci_connection_t *connection = hci_connection_for_handle( con_handle); 304 if (!connection) return 0; 305 hci_connection_timestamp(connection); 306 307 // count packet 308 connection->num_acl_packets_sent++; 309 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 310 311 // send packet 312 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 313 314 // free packet buffer for synchronous transport implementations 315 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 316 hci_stack->hci_packet_buffer_reserved = 0; 317 } 318 319 return err; 320 } 321 322 static void acl_handler(uint8_t *packet, int size){ 323 324 // log_info("acl_handler: size %u", size); 325 326 // get info 327 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 328 hci_connection_t *conn = hci_connection_for_handle(con_handle); 329 uint8_t acl_flags = READ_ACL_FLAGS(packet); 330 uint16_t acl_length = READ_ACL_LENGTH(packet); 331 332 // ignore non-registered handle 333 if (!conn){ 334 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 335 return; 336 } 337 338 // assert packet is complete 339 if (acl_length + 4 != size){ 340 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 341 return; 342 } 343 344 // update idle timestamp 345 hci_connection_timestamp(conn); 346 347 // handle different packet types 348 switch (acl_flags & 0x03) { 349 350 case 0x01: // continuation fragment 351 352 // sanity check 353 if (conn->acl_recombination_pos == 0) { 354 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 355 return; 356 } 357 358 // append fragment payload (header already stored) 359 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 360 conn->acl_recombination_pos += acl_length; 361 362 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 363 // conn->acl_recombination_pos, conn->acl_recombination_length); 364 365 // forward complete L2CAP packet if complete. 366 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 367 368 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 369 // reset recombination buffer 370 conn->acl_recombination_length = 0; 371 conn->acl_recombination_pos = 0; 372 } 373 break; 374 375 case 0x02: { // first fragment 376 377 // sanity check 378 if (conn->acl_recombination_pos) { 379 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 380 return; 381 } 382 383 // peek into L2CAP packet! 384 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 385 386 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 387 388 // compare fragment size to L2CAP packet size 389 if (acl_length >= l2cap_length + 4){ 390 391 // forward fragment as L2CAP packet 392 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 393 394 } else { 395 // store first fragment and tweak acl length for complete package 396 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 397 conn->acl_recombination_pos = acl_length + 4; 398 conn->acl_recombination_length = l2cap_length; 399 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 400 } 401 break; 402 403 } 404 default: 405 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 406 return; 407 } 408 409 // execute main loop 410 hci_run(); 411 } 412 413 static void hci_shutdown_connection(hci_connection_t *conn){ 414 log_info("Connection closed: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 415 416 // cancel all l2cap connections 417 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 418 419 run_loop_remove_timer(&conn->timeout); 420 421 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 422 btstack_memory_hci_connection_free( conn ); 423 424 // now it's gone 425 hci_emit_nr_connections_changed(); 426 } 427 428 static const uint16_t packet_type_sizes[] = { 429 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 430 HCI_ACL_DH1_SIZE, 0, 0, 0, 431 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 432 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 433 }; 434 static const uint8_t packet_type_feature_requirement_bit[] = { 435 0, // 3 slot packets 436 1, // 5 slot packets 437 25, // EDR 2 mpbs 438 26, // EDR 3 mbps 439 39, // 3 slot EDR packts 440 40, // 5 slot EDR packet 441 }; 442 static const uint16_t packet_type_feature_packet_mask[] = { 443 0x0f00, // 3 slot packets 444 0xf000, // 5 slot packets 445 0x1102, // EDR 2 mpbs 446 0x2204, // EDR 3 mbps 447 0x0300, // 3 slot EDR packts 448 0x3000, // 5 slot EDR packet 449 }; 450 451 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 452 // enable packet types based on size 453 uint16_t packet_types = 0; 454 int i; 455 for (i=0;i<16;i++){ 456 if (packet_type_sizes[i] == 0) continue; 457 if (packet_type_sizes[i] <= buffer_size){ 458 packet_types |= 1 << i; 459 } 460 } 461 // disable packet types due to missing local supported features 462 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 463 int bit_idx = packet_type_feature_requirement_bit[i]; 464 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 465 if (feature_set) continue; 466 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 467 packet_types &= ~packet_type_feature_packet_mask[i]; 468 } 469 // flip bits for "may not be used" 470 packet_types ^= 0x3306; 471 return packet_types; 472 } 473 474 uint16_t hci_usable_acl_packet_types(void){ 475 return hci_stack->packet_types; 476 } 477 478 uint8_t* hci_get_outgoing_packet_buffer(void){ 479 // hci packet buffer is >= acl data packet length 480 return hci_stack->hci_packet_buffer; 481 } 482 483 uint16_t hci_max_acl_data_packet_length(void){ 484 return hci_stack->acl_data_packet_length; 485 } 486 487 int hci_non_flushable_packet_boundary_flag_supported(void){ 488 // No. 54, byte 6, bit 6 489 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 490 } 491 492 int hci_ssp_supported(void){ 493 // No. 51, byte 6, bit 3 494 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 495 } 496 497 int hci_classic_supported(void){ 498 // No. 37, byte 4, bit 5, = No BR/EDR Support 499 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 500 } 501 502 int hci_le_supported(void){ 503 #ifdef HAVE_BLE 504 // No. 37, byte 4, bit 6 = LE Supported (Controller) 505 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 506 #else 507 return 0; 508 #endif 509 } 510 511 // get addr type and address used in advertisement packets 512 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t * addr){ 513 *addr_type = hci_stack->adv_addr_type; 514 if (hci_stack->adv_addr_type){ 515 memcpy(addr, hci_stack->adv_address, 6); 516 } else { 517 memcpy(addr, hci_stack->local_bd_addr, 6); 518 } 519 } 520 521 #ifdef HAVE_BLE 522 static void le_handle_advertisement_report(uint8_t *packet, int size){ 523 int num_reports = packet[3]; 524 int i; 525 int total_data_length = 0; 526 int data_offset = 0; 527 528 for (i=0; i<num_reports;i++){ 529 total_data_length += packet[4+num_reports*8+i]; 530 } 531 532 for (i=0; i<num_reports;i++){ 533 int pos = 0; 534 uint8_t data_length = packet[4+num_reports*8+i]; 535 uint8_t event_size = 10 + data_length; 536 uint8_t event[2 + event_size ]; 537 event[pos++] = GAP_LE_ADVERTISING_REPORT; 538 event[pos++] = event_size; 539 event[pos++] = packet[4+i]; // event_type; 540 event[pos++] = packet[4+num_reports+i]; // address_type; 541 memcpy(&event[pos], &packet[4+num_reports*2+i*6], 6); // bt address 542 pos += 6; 543 event[pos++] = packet[4+num_reports*9+total_data_length + i]; 544 event[pos++] = data_length; 545 memcpy(&packet[4+num_reports*9+data_offset], &event[pos], data_length); 546 data_offset += data_length; 547 pos += data_length; 548 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 549 } 550 } 551 #endif 552 553 // avoid huge local variables 554 #ifndef EMBEDDED 555 static device_name_t device_name; 556 #endif 557 static void event_handler(uint8_t *packet, int size){ 558 559 uint16_t event_length = packet[1]; 560 561 // assert packet is complete 562 if (size != event_length + 2){ 563 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 564 return; 565 } 566 567 bd_addr_t addr; 568 bd_addr_type_t addr_type; 569 uint8_t link_type; 570 hci_con_handle_t handle; 571 hci_connection_t * conn; 572 int i; 573 574 // printf("HCI:EVENT:%02x\n", packet[0]); 575 576 switch (packet[0]) { 577 578 case HCI_EVENT_COMMAND_COMPLETE: 579 // get num cmd packets 580 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack->num_cmd_packets, packet[2]); 581 hci_stack->num_cmd_packets = packet[2]; 582 583 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 584 // from offset 5 585 // status 586 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 587 hci_stack->acl_data_packet_length = READ_BT_16(packet, 6); 588 // ignore: SCO data packet len (8) 589 hci_stack->total_num_acl_packets = packet[9]; 590 // ignore: total num SCO packets 591 if (hci_stack->state == HCI_STATE_INITIALIZING){ 592 // determine usable ACL payload size 593 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 594 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 595 } 596 log_info("hci_read_buffer_size: used size %u, count %u\n", 597 hci_stack->acl_data_packet_length, hci_stack->total_num_acl_packets); 598 } 599 } 600 #ifdef HAVE_BLE 601 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 602 hci_stack->le_data_packet_length = READ_BT_16(packet, 6); 603 hci_stack->total_num_le_packets = packet[8]; 604 log_info("hci_le_read_buffer_size: size %u, count %u\n", hci_stack->le_data_packet_length, hci_stack->total_num_le_packets); 605 606 // use LE buffers if no clasic buffers have been reported 607 if (hci_stack->total_num_acl_packets == 0){ 608 log_info("use le buffers instead of classic ones"); 609 hci_stack->total_num_acl_packets = hci_stack->total_num_le_packets; 610 hci_stack->acl_data_packet_length = hci_stack->le_data_packet_length; 611 // determine usable ACL payload size 612 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 613 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 614 } 615 } 616 } 617 #endif 618 // Dump local address 619 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 620 bt_flip_addr(hci_stack->local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 621 log_info("Local Address, Status: 0x%02x: Addr: %s\n", 622 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 623 } 624 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 625 hci_emit_discoverable_enabled(hci_stack->discoverable); 626 } 627 // Note: HCI init checks 628 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 629 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 630 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 631 hci_stack->local_supported_features[0], hci_stack->local_supported_features[1], 632 hci_stack->local_supported_features[2], hci_stack->local_supported_features[3], 633 hci_stack->local_supported_features[4], hci_stack->local_supported_features[5], 634 hci_stack->local_supported_features[6], hci_stack->local_supported_features[7]); 635 636 // determine usable ACL packet types based buffer size and supported features 637 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]); 638 log_info("packet types %04x", hci_stack->packet_types); 639 640 // Classic/LE 641 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 642 } 643 break; 644 645 case HCI_EVENT_COMMAND_STATUS: 646 // get num cmd packets 647 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack->num_cmd_packets, packet[3]); 648 hci_stack->num_cmd_packets = packet[3]; 649 break; 650 651 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 652 for (i=0; i<packet[2];i++){ 653 handle = READ_BT_16(packet, 3 + 2*i); 654 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 655 conn = hci_connection_for_handle(handle); 656 if (!conn){ 657 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 658 continue; 659 } 660 conn->num_acl_packets_sent -= num_packets; 661 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 662 } 663 break; 664 665 case HCI_EVENT_CONNECTION_REQUEST: 666 bt_flip_addr(addr, &packet[2]); 667 // TODO: eval COD 8-10 668 link_type = packet[11]; 669 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 670 if (link_type == 1) { // ACL 671 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 672 if (!conn) { 673 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 674 } 675 if (!conn) { 676 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 677 hci_stack->decline_reason = 0x0d; 678 BD_ADDR_COPY(hci_stack->decline_addr, addr); 679 break; 680 } 681 conn->state = RECEIVED_CONNECTION_REQUEST; 682 hci_run(); 683 } else { 684 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 685 hci_stack->decline_reason = 0x0a; 686 BD_ADDR_COPY(hci_stack->decline_addr, addr); 687 } 688 break; 689 690 case HCI_EVENT_CONNECTION_COMPLETE: 691 // Connection management 692 bt_flip_addr(addr, &packet[5]); 693 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 694 addr_type = BD_ADDR_TYPE_CLASSIC; 695 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 696 if (conn) { 697 if (!packet[2]){ 698 conn->state = OPEN; 699 conn->con_handle = READ_BT_16(packet, 3); 700 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 701 702 // restart timer 703 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 704 run_loop_add_timer(&conn->timeout); 705 706 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 707 708 hci_emit_nr_connections_changed(); 709 } else { 710 // notify client if dedicated bonding 711 if (conn->bonding_flags & BONDING_DEDICATED){ 712 hci_emit_dedicated_bonding_result(conn, packet[2]); 713 } 714 715 // connection failed, remove entry 716 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 717 btstack_memory_hci_connection_free( conn ); 718 719 // if authentication error, also delete link key 720 if (packet[2] == 0x05) { 721 hci_drop_link_key_for_bd_addr(&addr); 722 } 723 } 724 } 725 break; 726 727 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 728 handle = READ_BT_16(packet, 3); 729 conn = hci_connection_for_handle(handle); 730 if (!conn) break; 731 if (!packet[2]){ 732 uint8_t * features = &packet[5]; 733 if (features[6] & (1 << 3)){ 734 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 735 } 736 } 737 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 738 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x", conn->bonding_flags); 739 if (conn->bonding_flags & BONDING_DEDICATED){ 740 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 741 } 742 break; 743 744 case HCI_EVENT_LINK_KEY_REQUEST: 745 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 746 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 747 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 748 if (hci_stack->bondable && !hci_stack->remote_device_db) break; 749 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 750 hci_run(); 751 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 752 return; 753 754 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 755 bt_flip_addr(addr, &packet[2]); 756 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 757 if (!conn) break; 758 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 759 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 760 // Change Connection Encryption keeps link key type 761 if (link_key_type != CHANGED_COMBINATION_KEY){ 762 conn->link_key_type = link_key_type; 763 } 764 if (!hci_stack->remote_device_db) break; 765 hci_stack->remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8], conn->link_key_type); 766 // still forward event to allow dismiss of pairing dialog 767 break; 768 } 769 770 case HCI_EVENT_PIN_CODE_REQUEST: 771 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 772 // non-bondable mode: pin code negative reply will be sent 773 if (!hci_stack->bondable){ 774 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 775 hci_run(); 776 return; 777 } 778 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 779 if (!hci_stack->remote_device_db) break; 780 bt_flip_addr(addr, &packet[2]); 781 hci_stack->remote_device_db->delete_link_key(&addr); 782 break; 783 784 case HCI_EVENT_IO_CAPABILITY_REQUEST: 785 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 786 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 787 break; 788 789 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 790 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 791 if (!hci_stack->ssp_auto_accept) break; 792 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 793 break; 794 795 case HCI_EVENT_USER_PASSKEY_REQUEST: 796 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 797 if (!hci_stack->ssp_auto_accept) break; 798 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 799 break; 800 801 case HCI_EVENT_ENCRYPTION_CHANGE: 802 handle = READ_BT_16(packet, 3); 803 conn = hci_connection_for_handle(handle); 804 if (!conn) break; 805 if (packet[2] == 0) { 806 if (packet[5]){ 807 conn->authentication_flags |= CONNECTION_ENCRYPTED; 808 } else { 809 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 810 } 811 } 812 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 813 break; 814 815 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 816 handle = READ_BT_16(packet, 3); 817 conn = hci_connection_for_handle(handle); 818 if (!conn) break; 819 820 // dedicated bonding: send result and disconnect 821 if (conn->bonding_flags & BONDING_DEDICATED){ 822 conn->bonding_flags &= ~BONDING_DEDICATED; 823 hci_emit_dedicated_bonding_result( conn, packet[2]); 824 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 825 break; 826 } 827 828 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 829 // link key sufficient for requested security 830 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 831 break; 832 } 833 // not enough 834 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 835 break; 836 837 #ifndef EMBEDDED 838 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 839 if (!hci_stack->remote_device_db) break; 840 if (packet[2]) break; // status not ok 841 bt_flip_addr(addr, &packet[3]); 842 // fix for invalid remote names - terminate on 0xff 843 for (i=0; i<248;i++){ 844 if (packet[9+i] == 0xff){ 845 packet[9+i] = 0; 846 break; 847 } 848 } 849 memset(&device_name, 0, sizeof(device_name_t)); 850 strncpy((char*) device_name, (char*) &packet[9], 248); 851 hci_stack->remote_device_db->put_name(&addr, &device_name); 852 break; 853 854 case HCI_EVENT_INQUIRY_RESULT: 855 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 856 if (!hci_stack->remote_device_db) break; 857 // first send inq result packet 858 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 859 // then send cached remote names 860 for (i=0; i<packet[2];i++){ 861 bt_flip_addr(addr, &packet[3+i*6]); 862 if (hci_stack->remote_device_db->get_name(&addr, &device_name)){ 863 hci_emit_remote_name_cached(&addr, &device_name); 864 } 865 } 866 return; 867 #endif 868 869 case HCI_EVENT_DISCONNECTION_COMPLETE: 870 if (!packet[2]){ 871 handle = READ_BT_16(packet, 3); 872 hci_connection_t * conn = hci_connection_for_handle(handle); 873 if (conn) { 874 hci_shutdown_connection(conn); 875 } 876 } 877 break; 878 879 case HCI_EVENT_HARDWARE_ERROR: 880 if(hci_stack->control && hci_stack->control->hw_error){ 881 (*hci_stack->control->hw_error)(); 882 } 883 break; 884 885 case DAEMON_EVENT_HCI_PACKET_SENT: 886 // free packet buffer for asynchronous transport 887 if (hci_transport_synchronous()) break; 888 hci_stack->hci_packet_buffer_reserved = 0; 889 break; 890 891 #ifdef HAVE_BLE 892 case HCI_EVENT_LE_META: 893 switch (packet[2]){ 894 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 895 if (hci_stack->le_scanning_state != LE_SCANNING) break; 896 le_handle_advertisement_report(packet, size); 897 break; 898 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 899 // Connection management 900 bt_flip_addr(addr, &packet[8]); 901 addr_type = (bd_addr_type_t)packet[7]; 902 log_info("LE Connection_complete (status=%u) type %u, %s\n", packet[3], addr_type, bd_addr_to_str(addr)); 903 // LE connections are auto-accepted, so just create a connection if there isn't one already 904 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 905 if (packet[3]){ 906 if (conn){ 907 // outgoing connection failed, remove entry 908 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 909 btstack_memory_hci_connection_free( conn ); 910 911 } 912 // if authentication error, also delete link key 913 if (packet[3] == 0x05) { 914 hci_drop_link_key_for_bd_addr(&addr); 915 } 916 break; 917 } 918 if (!conn){ 919 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 920 } 921 if (!conn){ 922 // no memory 923 break; 924 } 925 926 conn->state = OPEN; 927 conn->con_handle = READ_BT_16(packet, 4); 928 929 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 930 931 // restart timer 932 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 933 // run_loop_add_timer(&conn->timeout); 934 935 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 936 937 hci_emit_nr_connections_changed(); 938 break; 939 940 // printf("LE buffer size: %u, count %u\n", READ_BT_16(packet,6), packet[8]); 941 942 default: 943 break; 944 } 945 break; 946 #endif 947 948 default: 949 break; 950 } 951 952 // handle BT initialization 953 if (hci_stack->state == HCI_STATE_INITIALIZING){ 954 if (hci_stack->substate % 2){ 955 // odd: waiting for event 956 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 957 // wait for explicit COMMAND COMPLETE on RESET 958 if (hci_stack->substate > 1 || COMMAND_COMPLETE_EVENT(packet, hci_reset)) { 959 hci_stack->substate++; 960 } 961 } 962 } 963 } 964 965 // help with BT sleep 966 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 967 && hci_stack->substate == 1 968 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 969 hci_stack->substate++; 970 } 971 972 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 973 974 // execute main loop 975 hci_run(); 976 } 977 978 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 979 switch (packet_type) { 980 case HCI_EVENT_PACKET: 981 event_handler(packet, size); 982 break; 983 case HCI_ACL_DATA_PACKET: 984 acl_handler(packet, size); 985 break; 986 default: 987 break; 988 } 989 } 990 991 /** Register HCI packet handlers */ 992 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 993 hci_stack->packet_handler = handler; 994 } 995 996 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 997 998 #ifdef HAVE_MALLOC 999 if (!hci_stack) { 1000 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1001 } 1002 #else 1003 hci_stack = &hci_stack_static; 1004 #endif 1005 memset(hci_stack, 0, sizeof(hci_stack_t)); 1006 1007 // reference to use transport layer implementation 1008 hci_stack->hci_transport = transport; 1009 1010 // references to used control implementation 1011 hci_stack->control = control; 1012 1013 // reference to used config 1014 hci_stack->config = config; 1015 1016 // no connections yet 1017 hci_stack->connections = NULL; 1018 hci_stack->discoverable = 0; 1019 hci_stack->connectable = 0; 1020 hci_stack->bondable = 1; 1021 1022 // no pending cmds 1023 hci_stack->decline_reason = 0; 1024 hci_stack->new_scan_enable_value = 0xff; 1025 1026 // higher level handler 1027 hci_stack->packet_handler = dummy_handler; 1028 1029 // store and open remote device db 1030 hci_stack->remote_device_db = remote_device_db; 1031 if (hci_stack->remote_device_db) { 1032 hci_stack->remote_device_db->open(); 1033 } 1034 1035 // max acl payload size defined in config.h 1036 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1037 1038 // register packet handlers with transport 1039 transport->register_packet_handler(&packet_handler); 1040 1041 hci_stack->state = HCI_STATE_OFF; 1042 1043 // class of device 1044 hci_stack->class_of_device = 0x007a020c; // Smartphone 1045 1046 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1047 hci_stack->ssp_enable = 1; 1048 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1049 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1050 hci_stack->ssp_auto_accept = 1; 1051 1052 // LE 1053 hci_stack->adv_addr_type = 0; 1054 memset(hci_stack->adv_address, 0, 6); 1055 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1056 } 1057 1058 void hci_close(){ 1059 // close remote device db 1060 if (hci_stack->remote_device_db) { 1061 hci_stack->remote_device_db->close(); 1062 } 1063 while (hci_stack->connections) { 1064 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1065 } 1066 hci_power_control(HCI_POWER_OFF); 1067 1068 #ifdef HAVE_MALLOC 1069 free(hci_stack); 1070 #endif 1071 hci_stack = NULL; 1072 } 1073 1074 void hci_set_class_of_device(uint32_t class_of_device){ 1075 hci_stack->class_of_device = class_of_device; 1076 } 1077 1078 void hci_disable_l2cap_timeout_check(){ 1079 disable_l2cap_timeouts = 1; 1080 } 1081 // State-Module-Driver overview 1082 // state module low-level 1083 // HCI_STATE_OFF off close 1084 // HCI_STATE_INITIALIZING, on open 1085 // HCI_STATE_WORKING, on open 1086 // HCI_STATE_HALTING, on open 1087 // HCI_STATE_SLEEPING, off/sleep close 1088 // HCI_STATE_FALLING_ASLEEP on open 1089 1090 static int hci_power_control_on(void){ 1091 1092 // power on 1093 int err = 0; 1094 if (hci_stack->control && hci_stack->control->on){ 1095 err = (*hci_stack->control->on)(hci_stack->config); 1096 } 1097 if (err){ 1098 log_error( "POWER_ON failed\n"); 1099 hci_emit_hci_open_failed(); 1100 return err; 1101 } 1102 1103 // open low-level device 1104 err = hci_stack->hci_transport->open(hci_stack->config); 1105 if (err){ 1106 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1107 if (hci_stack->control && hci_stack->control->off){ 1108 (*hci_stack->control->off)(hci_stack->config); 1109 } 1110 hci_emit_hci_open_failed(); 1111 return err; 1112 } 1113 return 0; 1114 } 1115 1116 static void hci_power_control_off(void){ 1117 1118 log_info("hci_power_control_off\n"); 1119 1120 // close low-level device 1121 hci_stack->hci_transport->close(hci_stack->config); 1122 1123 log_info("hci_power_control_off - hci_transport closed\n"); 1124 1125 // power off 1126 if (hci_stack->control && hci_stack->control->off){ 1127 (*hci_stack->control->off)(hci_stack->config); 1128 } 1129 1130 log_info("hci_power_control_off - control closed\n"); 1131 1132 hci_stack->state = HCI_STATE_OFF; 1133 } 1134 1135 static void hci_power_control_sleep(void){ 1136 1137 log_info("hci_power_control_sleep\n"); 1138 1139 #if 0 1140 // don't close serial port during sleep 1141 1142 // close low-level device 1143 hci_stack->hci_transport->close(hci_stack->config); 1144 #endif 1145 1146 // sleep mode 1147 if (hci_stack->control && hci_stack->control->sleep){ 1148 (*hci_stack->control->sleep)(hci_stack->config); 1149 } 1150 1151 hci_stack->state = HCI_STATE_SLEEPING; 1152 } 1153 1154 static int hci_power_control_wake(void){ 1155 1156 log_info("hci_power_control_wake\n"); 1157 1158 // wake on 1159 if (hci_stack->control && hci_stack->control->wake){ 1160 (*hci_stack->control->wake)(hci_stack->config); 1161 } 1162 1163 #if 0 1164 // open low-level device 1165 int err = hci_stack->hci_transport->open(hci_stack->config); 1166 if (err){ 1167 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1168 if (hci_stack->control && hci_stack->control->off){ 1169 (*hci_stack->control->off)(hci_stack->config); 1170 } 1171 hci_emit_hci_open_failed(); 1172 return err; 1173 } 1174 #endif 1175 1176 return 0; 1177 } 1178 1179 1180 int hci_power_control(HCI_POWER_MODE power_mode){ 1181 1182 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack->state); 1183 1184 int err = 0; 1185 switch (hci_stack->state){ 1186 1187 case HCI_STATE_OFF: 1188 switch (power_mode){ 1189 case HCI_POWER_ON: 1190 err = hci_power_control_on(); 1191 if (err) return err; 1192 // set up state machine 1193 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1194 hci_stack->state = HCI_STATE_INITIALIZING; 1195 hci_stack->substate = 0; 1196 break; 1197 case HCI_POWER_OFF: 1198 // do nothing 1199 break; 1200 case HCI_POWER_SLEEP: 1201 // do nothing (with SLEEP == OFF) 1202 break; 1203 } 1204 break; 1205 1206 case HCI_STATE_INITIALIZING: 1207 switch (power_mode){ 1208 case HCI_POWER_ON: 1209 // do nothing 1210 break; 1211 case HCI_POWER_OFF: 1212 // no connections yet, just turn it off 1213 hci_power_control_off(); 1214 break; 1215 case HCI_POWER_SLEEP: 1216 // no connections yet, just turn it off 1217 hci_power_control_sleep(); 1218 break; 1219 } 1220 break; 1221 1222 case HCI_STATE_WORKING: 1223 switch (power_mode){ 1224 case HCI_POWER_ON: 1225 // do nothing 1226 break; 1227 case HCI_POWER_OFF: 1228 // see hci_run 1229 hci_stack->state = HCI_STATE_HALTING; 1230 break; 1231 case HCI_POWER_SLEEP: 1232 // see hci_run 1233 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1234 hci_stack->substate = 0; 1235 break; 1236 } 1237 break; 1238 1239 case HCI_STATE_HALTING: 1240 switch (power_mode){ 1241 case HCI_POWER_ON: 1242 // set up state machine 1243 hci_stack->state = HCI_STATE_INITIALIZING; 1244 hci_stack->substate = 0; 1245 break; 1246 case HCI_POWER_OFF: 1247 // do nothing 1248 break; 1249 case HCI_POWER_SLEEP: 1250 // see hci_run 1251 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1252 hci_stack->substate = 0; 1253 break; 1254 } 1255 break; 1256 1257 case HCI_STATE_FALLING_ASLEEP: 1258 switch (power_mode){ 1259 case HCI_POWER_ON: 1260 1261 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1262 // nothing to do, if H4 supports power management 1263 if (bt_control_iphone_power_management_enabled()){ 1264 hci_stack->state = HCI_STATE_INITIALIZING; 1265 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1266 break; 1267 } 1268 #endif 1269 // set up state machine 1270 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1271 hci_stack->state = HCI_STATE_INITIALIZING; 1272 hci_stack->substate = 0; 1273 break; 1274 case HCI_POWER_OFF: 1275 // see hci_run 1276 hci_stack->state = HCI_STATE_HALTING; 1277 break; 1278 case HCI_POWER_SLEEP: 1279 // do nothing 1280 break; 1281 } 1282 break; 1283 1284 case HCI_STATE_SLEEPING: 1285 switch (power_mode){ 1286 case HCI_POWER_ON: 1287 1288 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1289 // nothing to do, if H4 supports power management 1290 if (bt_control_iphone_power_management_enabled()){ 1291 hci_stack->state = HCI_STATE_INITIALIZING; 1292 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1293 hci_update_scan_enable(); 1294 break; 1295 } 1296 #endif 1297 err = hci_power_control_wake(); 1298 if (err) return err; 1299 // set up state machine 1300 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1301 hci_stack->state = HCI_STATE_INITIALIZING; 1302 hci_stack->substate = 0; 1303 break; 1304 case HCI_POWER_OFF: 1305 hci_stack->state = HCI_STATE_HALTING; 1306 break; 1307 case HCI_POWER_SLEEP: 1308 // do nothing 1309 break; 1310 } 1311 break; 1312 } 1313 1314 // create internal event 1315 hci_emit_state(); 1316 1317 // trigger next/first action 1318 hci_run(); 1319 1320 return 0; 1321 } 1322 1323 static void hci_update_scan_enable(void){ 1324 // 2 = page scan, 1 = inq scan 1325 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 1326 hci_run(); 1327 } 1328 1329 void hci_discoverable_control(uint8_t enable){ 1330 if (enable) enable = 1; // normalize argument 1331 1332 if (hci_stack->discoverable == enable){ 1333 hci_emit_discoverable_enabled(hci_stack->discoverable); 1334 return; 1335 } 1336 1337 hci_stack->discoverable = enable; 1338 hci_update_scan_enable(); 1339 } 1340 1341 void hci_connectable_control(uint8_t enable){ 1342 if (enable) enable = 1; // normalize argument 1343 1344 // don't emit event 1345 if (hci_stack->connectable == enable) return; 1346 1347 hci_stack->connectable = enable; 1348 hci_update_scan_enable(); 1349 } 1350 1351 bd_addr_t * hci_local_bd_addr(void){ 1352 return &hci_stack->local_bd_addr; 1353 } 1354 1355 void hci_run(){ 1356 1357 hci_connection_t * connection; 1358 linked_item_t * it; 1359 1360 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1361 1362 // global/non-connection oriented commands 1363 1364 // decline incoming connections 1365 if (hci_stack->decline_reason){ 1366 uint8_t reason = hci_stack->decline_reason; 1367 hci_stack->decline_reason = 0; 1368 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 1369 return; 1370 } 1371 1372 // send scan enable 1373 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 1374 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1375 hci_stack->new_scan_enable_value = 0xff; 1376 return; 1377 } 1378 1379 #ifdef HAVE_BLE 1380 // handle le scan 1381 if (hci_stack->state == HCI_STATE_WORKING){ 1382 switch(hci_stack->le_scanning_state){ 1383 case LE_START_SCAN: 1384 hci_stack->le_scanning_state = LE_SCANNING; 1385 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 1386 return; 1387 1388 case LE_STOP_SCAN: 1389 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1390 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 1391 return; 1392 default: 1393 break; 1394 } 1395 } 1396 #endif 1397 1398 // send pending HCI commands 1399 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 1400 connection = (hci_connection_t *) it; 1401 1402 if (connection->state == SEND_DISCONNECT){ 1403 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1404 connection->state = SENT_DISCONNECT; 1405 return; 1406 } 1407 1408 if (connection->state == SEND_CREATE_CONNECTION){ 1409 switch(connection->address_type){ 1410 case BD_ADDR_TYPE_CLASSIC: 1411 log_info("sending hci_create_connection\n"); 1412 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 1413 break; 1414 default: 1415 #ifdef HAVE_BLE 1416 log_info("sending hci_le_create_connection\n"); 1417 hci_send_cmd(&hci_le_create_connection, 1418 1000, // scan interval: 625 ms 1419 1000, // scan interval: 625 ms 1420 0, // don't use whitelist 1421 connection->address_type, // peer address type 1422 connection->address, // peer bd addr 1423 0, // our addr type: public 1424 80, // conn interval min 1425 80, // conn interval max (3200 * 0.625) 1426 0, // conn latency 1427 2000, // supervision timeout 1428 0, // min ce length 1429 1000 // max ce length 1430 ); 1431 1432 connection->state = SENT_CREATE_CONNECTION; 1433 #endif 1434 break; 1435 } 1436 return; 1437 } 1438 1439 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 1440 log_info("sending hci_accept_connection_request\n"); 1441 connection->state = ACCEPTED_CONNECTION_REQUEST; 1442 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1443 return; 1444 } 1445 1446 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1447 log_info("responding to link key request\n"); 1448 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1449 link_key_t link_key; 1450 link_key_type_t link_key_type; 1451 if ( hci_stack->remote_device_db 1452 && hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type) 1453 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 1454 connection->link_key_type = link_key_type; 1455 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1456 } else { 1457 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1458 } 1459 return; 1460 } 1461 1462 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 1463 log_info("denying to pin request\n"); 1464 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 1465 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 1466 return; 1467 } 1468 1469 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1470 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1471 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 1472 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 1473 // tweak authentication requirements 1474 uint8_t authreq = hci_stack->ssp_authentication_requirement; 1475 if (connection->bonding_flags & BONDING_DEDICATED){ 1476 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 1477 } 1478 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 1479 authreq |= 1; 1480 } 1481 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 1482 } else { 1483 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 1484 } 1485 return; 1486 } 1487 1488 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1489 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1490 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1491 return; 1492 } 1493 1494 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1495 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1496 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1497 return; 1498 } 1499 1500 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 1501 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 1502 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 1503 return; 1504 } 1505 1506 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 1507 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 1508 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 1509 return; 1510 } 1511 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 1512 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 1513 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 1514 return; 1515 } 1516 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 1517 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 1518 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 1519 return; 1520 } 1521 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 1522 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 1523 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 1524 return; 1525 } 1526 } 1527 1528 switch (hci_stack->state){ 1529 case HCI_STATE_INITIALIZING: 1530 // log_info("hci_init: substate %u\n", hci_stack->substate); 1531 if (hci_stack->substate % 2) { 1532 // odd: waiting for command completion 1533 return; 1534 } 1535 switch (hci_stack->substate >> 1){ 1536 case 0: // RESET 1537 hci_send_cmd(&hci_reset); 1538 1539 if (hci_stack->config == 0 || ((hci_uart_config_t *)hci_stack->config)->baudrate_main == 0){ 1540 // skip baud change 1541 hci_stack->substate = 4; // >> 1 = 2 1542 } 1543 break; 1544 case 1: // SEND BAUD CHANGE 1545 hci_stack->control->baudrate_cmd(hci_stack->config, ((hci_uart_config_t *)hci_stack->config)->baudrate_main, hci_stack->hci_packet_buffer); 1546 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1547 break; 1548 case 2: // LOCAL BAUD CHANGE 1549 hci_stack->hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack->config)->baudrate_main); 1550 hci_stack->substate += 2; 1551 // break missing here for fall through 1552 1553 case 3: 1554 // Custom initialization 1555 if (hci_stack->control && hci_stack->control->next_cmd){ 1556 int valid_cmd = (*hci_stack->control->next_cmd)(hci_stack->config, hci_stack->hci_packet_buffer); 1557 if (valid_cmd){ 1558 int size = 3 + hci_stack->hci_packet_buffer[2]; 1559 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1560 hci_stack->substate = 4; // more init commands 1561 break; 1562 } 1563 log_info("hci_run: init script done\n\r"); 1564 } 1565 // otherwise continue 1566 hci_send_cmd(&hci_read_bd_addr); 1567 break; 1568 case 4: 1569 hci_send_cmd(&hci_read_buffer_size); 1570 break; 1571 case 5: 1572 hci_send_cmd(&hci_read_local_supported_features); 1573 break; 1574 case 6: 1575 if (hci_le_supported()){ 1576 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1577 } else { 1578 // Kensington Bluetoot 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1579 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1580 } 1581 1582 // skip Classic init commands for LE only chipsets 1583 if (!hci_classic_supported()){ 1584 if (hci_le_supported()){ 1585 hci_stack->substate = 11 << 1; // skip all classic command 1586 } else { 1587 log_error("Neither BR/EDR nor LE supported"); 1588 hci_stack->substate = 13 << 1; // skip all 1589 } 1590 } 1591 break; 1592 case 7: 1593 if (hci_ssp_supported()){ 1594 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1595 break; 1596 } 1597 hci_stack->substate += 2; 1598 // break missing here for fall through 1599 1600 case 8: 1601 // ca. 15 sec 1602 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1603 break; 1604 case 9: 1605 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1606 break; 1607 case 10: 1608 if (hci_stack->local_name){ 1609 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1610 } else { 1611 char hostname[30]; 1612 #ifdef EMBEDDED 1613 // BTstack-11:22:33:44:55:66 1614 strcpy(hostname, "BTstack "); 1615 strcat(hostname, bd_addr_to_str(hci_stack->local_bd_addr)); 1616 printf("---> Name %s\n", hostname); 1617 #else 1618 // hostname for POSIX systems 1619 gethostname(hostname, 30); 1620 hostname[29] = '\0'; 1621 #endif 1622 hci_send_cmd(&hci_write_local_name, hostname); 1623 } 1624 break; 1625 case 11: 1626 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1627 if (!hci_le_supported()){ 1628 // SKIP LE init for Classic only configuration 1629 hci_stack->substate = 13 << 1; 1630 } 1631 break; 1632 1633 #ifdef HAVE_BLE 1634 // LE INIT 1635 case 12: 1636 hci_send_cmd(&hci_le_read_buffer_size); 1637 break; 1638 case 13: 1639 // LE Supported Host = 1, Simultaneous Host = 0 1640 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1641 break; 1642 #endif 1643 1644 // DONE 1645 case 14: 1646 // done. 1647 hci_stack->state = HCI_STATE_WORKING; 1648 hci_emit_state(); 1649 break; 1650 default: 1651 break; 1652 } 1653 hci_stack->substate++; 1654 break; 1655 1656 case HCI_STATE_HALTING: 1657 1658 log_info("HCI_STATE_HALTING\n"); 1659 // close all open connections 1660 connection = (hci_connection_t *) hci_stack->connections; 1661 if (connection){ 1662 1663 // send disconnect 1664 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1665 1666 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1667 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1668 1669 // send disconnected event right away - causes higher layer connections to get closed, too. 1670 hci_shutdown_connection(connection); 1671 return; 1672 } 1673 log_info("HCI_STATE_HALTING, calling off\n"); 1674 1675 // switch mode 1676 hci_power_control_off(); 1677 1678 log_info("HCI_STATE_HALTING, emitting state\n"); 1679 hci_emit_state(); 1680 log_info("HCI_STATE_HALTING, done\n"); 1681 break; 1682 1683 case HCI_STATE_FALLING_ASLEEP: 1684 switch(hci_stack->substate) { 1685 case 0: 1686 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1687 // close all open connections 1688 connection = (hci_connection_t *) hci_stack->connections; 1689 1690 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1691 // don't close connections, if H4 supports power management 1692 if (bt_control_iphone_power_management_enabled()){ 1693 connection = NULL; 1694 } 1695 #endif 1696 if (connection){ 1697 1698 // send disconnect 1699 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1700 1701 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1702 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1703 1704 // send disconnected event right away - causes higher layer connections to get closed, too. 1705 hci_shutdown_connection(connection); 1706 return; 1707 } 1708 1709 if (hci_classic_supported()){ 1710 // disable page and inquiry scan 1711 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1712 1713 log_info("HCI_STATE_HALTING, disabling inq scans\n"); 1714 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 1715 1716 // continue in next sub state 1717 hci_stack->substate++; 1718 break; 1719 } 1720 // fall through for ble-only chips 1721 1722 case 2: 1723 log_info("HCI_STATE_HALTING, calling sleep\n"); 1724 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1725 // don't actually go to sleep, if H4 supports power management 1726 if (bt_control_iphone_power_management_enabled()){ 1727 // SLEEP MODE reached 1728 hci_stack->state = HCI_STATE_SLEEPING; 1729 hci_emit_state(); 1730 break; 1731 } 1732 #endif 1733 // switch mode 1734 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 1735 hci_emit_state(); 1736 break; 1737 1738 default: 1739 break; 1740 } 1741 break; 1742 1743 default: 1744 break; 1745 } 1746 } 1747 1748 int hci_send_cmd_packet(uint8_t *packet, int size){ 1749 bd_addr_t addr; 1750 hci_connection_t * conn; 1751 // house-keeping 1752 1753 // create_connection? 1754 if (IS_COMMAND(packet, hci_create_connection)){ 1755 bt_flip_addr(addr, &packet[3]); 1756 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1757 1758 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1759 if (!conn){ 1760 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1761 if (!conn){ 1762 // notify client that alloc failed 1763 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1764 return 0; // don't sent packet to controller 1765 } 1766 conn->state = SEND_CREATE_CONNECTION; 1767 } 1768 log_info("conn state %u", conn->state); 1769 switch (conn->state){ 1770 // if connection active exists 1771 case OPEN: 1772 // and OPEN, emit connection complete command, don't send to controller 1773 hci_emit_connection_complete(conn, 0); 1774 return 0; 1775 case SEND_CREATE_CONNECTION: 1776 // connection created by hci, e.g. dedicated bonding 1777 break; 1778 default: 1779 // otherwise, just ignore as it is already in the open process 1780 return 0; 1781 } 1782 conn->state = SENT_CREATE_CONNECTION; 1783 } 1784 1785 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1786 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1787 } 1788 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1789 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1790 } 1791 1792 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1793 if (hci_stack->remote_device_db){ 1794 bt_flip_addr(addr, &packet[3]); 1795 hci_stack->remote_device_db->delete_link_key(&addr); 1796 } 1797 } 1798 1799 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 1800 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 1801 bt_flip_addr(addr, &packet[3]); 1802 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1803 if (conn){ 1804 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 1805 } 1806 } 1807 1808 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 1809 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 1810 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 1811 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 1812 bt_flip_addr(addr, &packet[3]); 1813 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1814 if (conn){ 1815 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 1816 } 1817 } 1818 1819 #ifdef HAVE_BLE 1820 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 1821 hci_stack->adv_addr_type = packet[8]; 1822 } 1823 if (IS_COMMAND(packet, hci_le_set_random_address)){ 1824 bt_flip_addr(hci_stack->adv_address, &packet[3]); 1825 } 1826 #endif 1827 1828 hci_stack->num_cmd_packets--; 1829 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1830 1831 // free packet buffer for synchronous transport implementations 1832 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 1833 hci_stack->hci_packet_buffer_reserved = 0; 1834 } 1835 1836 return err; 1837 } 1838 1839 // disconnect because of security block 1840 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 1841 hci_connection_t * connection = hci_connection_for_handle(con_handle); 1842 if (!connection) return; 1843 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 1844 } 1845 1846 1847 // Configure Secure Simple Pairing 1848 1849 // enable will enable SSP during init 1850 void hci_ssp_set_enable(int enable){ 1851 hci_stack->ssp_enable = enable; 1852 } 1853 1854 int hci_local_ssp_activated(){ 1855 return hci_ssp_supported() && hci_stack->ssp_enable; 1856 } 1857 1858 // if set, BTstack will respond to io capability request using authentication requirement 1859 void hci_ssp_set_io_capability(int io_capability){ 1860 hci_stack->ssp_io_capability = io_capability; 1861 } 1862 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 1863 hci_stack->ssp_authentication_requirement = authentication_requirement; 1864 } 1865 1866 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 1867 void hci_ssp_set_auto_accept(int auto_accept){ 1868 hci_stack->ssp_auto_accept = auto_accept; 1869 } 1870 1871 /** 1872 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1873 */ 1874 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1875 va_list argptr; 1876 va_start(argptr, cmd); 1877 uint16_t size = hci_create_cmd_internal(hci_stack->hci_packet_buffer, cmd, argptr); 1878 va_end(argptr); 1879 return hci_send_cmd_packet(hci_stack->hci_packet_buffer, size); 1880 } 1881 1882 // Create various non-HCI events. 1883 // TODO: generalize, use table similar to hci_create_command 1884 1885 void hci_emit_state(){ 1886 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 1887 uint8_t event[3]; 1888 event[0] = BTSTACK_EVENT_STATE; 1889 event[1] = sizeof(event) - 2; 1890 event[2] = hci_stack->state; 1891 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1892 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1893 } 1894 1895 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1896 uint8_t event[13]; 1897 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1898 event[1] = sizeof(event) - 2; 1899 event[2] = status; 1900 bt_store_16(event, 3, conn->con_handle); 1901 bt_flip_addr(&event[5], conn->address); 1902 event[11] = 1; // ACL connection 1903 event[12] = 0; // encryption disabled 1904 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1905 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1906 } 1907 1908 void hci_emit_le_connection_complete(hci_connection_t *conn, uint8_t status){ 1909 uint8_t event[21]; 1910 event[0] = HCI_EVENT_LE_META; 1911 event[1] = sizeof(event) - 2; 1912 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 1913 event[3] = status; 1914 bt_store_16(event, 4, conn->con_handle); 1915 event[6] = 0; // TODO: role 1916 event[7] = conn->address_type; 1917 bt_flip_addr(&event[8], conn->address); 1918 bt_store_16(event, 14, 0); // interval 1919 bt_store_16(event, 16, 0); // latency 1920 bt_store_16(event, 18, 0); // supervision timeout 1921 event[20] = 0; // master clock accuracy 1922 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1923 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1924 } 1925 1926 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1927 uint8_t event[6]; 1928 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1929 event[1] = sizeof(event) - 2; 1930 event[2] = 0; // status = OK 1931 bt_store_16(event, 3, handle); 1932 event[5] = reason; 1933 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1934 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1935 } 1936 1937 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1938 if (disable_l2cap_timeouts) return; 1939 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 1940 uint8_t event[4]; 1941 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1942 event[1] = sizeof(event) - 2; 1943 bt_store_16(event, 2, conn->con_handle); 1944 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1945 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1946 } 1947 1948 void hci_emit_nr_connections_changed(){ 1949 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 1950 uint8_t event[3]; 1951 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1952 event[1] = sizeof(event) - 2; 1953 event[2] = nr_hci_connections(); 1954 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1955 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1956 } 1957 1958 void hci_emit_hci_open_failed(){ 1959 log_info("BTSTACK_EVENT_POWERON_FAILED"); 1960 uint8_t event[2]; 1961 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1962 event[1] = sizeof(event) - 2; 1963 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1964 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1965 } 1966 1967 #ifndef EMBEDDED 1968 void hci_emit_btstack_version() { 1969 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 1970 uint8_t event[6]; 1971 event[0] = BTSTACK_EVENT_VERSION; 1972 event[1] = sizeof(event) - 2; 1973 event[2] = BTSTACK_MAJOR; 1974 event[3] = BTSTACK_MINOR; 1975 bt_store_16(event, 4, BTSTACK_REVISION); 1976 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1977 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1978 } 1979 #endif 1980 1981 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1982 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 1983 uint8_t event[3]; 1984 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1985 event[1] = sizeof(event) - 2; 1986 event[2] = enabled; 1987 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1988 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1989 } 1990 1991 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1992 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 1993 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1994 event[1] = sizeof(event) - 2 - 1; 1995 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1996 bt_flip_addr(&event[3], *addr); 1997 memcpy(&event[9], name, 248); 1998 1999 event[9+248] = 0; // assert \0 for log_info 2000 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 2001 2002 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 2003 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 2004 } 2005 2006 void hci_emit_discoverable_enabled(uint8_t enabled){ 2007 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 2008 uint8_t event[3]; 2009 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 2010 event[1] = sizeof(event) - 2; 2011 event[2] = enabled; 2012 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2013 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2014 } 2015 2016 void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 2017 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 2018 uint8_t event[5]; 2019 int pos = 0; 2020 event[pos++] = GAP_SECURITY_LEVEL; 2021 event[pos++] = sizeof(event) - 2; 2022 bt_store_16(event, 2, con_handle); 2023 pos += 2; 2024 event[pos++] = level; 2025 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2026 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2027 } 2028 2029 void hci_emit_dedicated_bonding_result(hci_connection_t * connection, uint8_t status){ 2030 log_info("hci_emit_dedicated_bonding_result %u ", status); 2031 uint8_t event[9]; 2032 int pos = 0; 2033 event[pos++] = GAP_DEDICATED_BONDING_COMPLETED; 2034 event[pos++] = sizeof(event) - 2; 2035 event[pos++] = status; 2036 bt_flip_addr( * (bd_addr_t *) &event[pos], connection->address); 2037 pos += 6; 2038 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2039 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2040 } 2041 2042 // query if remote side supports SSP 2043 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 2044 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2045 if (!connection) return 0; 2046 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 2047 } 2048 2049 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 2050 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 2051 } 2052 2053 // GAP API 2054 /** 2055 * @bbrief enable/disable bonding. default is enabled 2056 * @praram enabled 2057 */ 2058 void gap_set_bondable_mode(int enable){ 2059 hci_stack->bondable = enable ? 1 : 0; 2060 } 2061 2062 /** 2063 * @brief map link keys to security levels 2064 */ 2065 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 2066 switch (link_key_type){ 2067 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 2068 return LEVEL_4; 2069 case COMBINATION_KEY: 2070 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 2071 return LEVEL_3; 2072 default: 2073 return LEVEL_2; 2074 } 2075 } 2076 2077 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 2078 if (!connection) return LEVEL_0; 2079 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 2080 return gap_security_level_for_link_key_type(connection->link_key_type); 2081 } 2082 2083 2084 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 2085 printf("gap_mitm_protection_required_for_security_level %u\n", level); 2086 return level > LEVEL_2; 2087 } 2088 2089 /** 2090 * @brief get current security level 2091 */ 2092 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 2093 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2094 if (!connection) return LEVEL_0; 2095 return gap_security_level_for_connection(connection); 2096 } 2097 2098 /** 2099 * @brief request connection to device to 2100 * @result GAP_AUTHENTICATION_RESULT 2101 */ 2102 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 2103 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2104 if (!connection){ 2105 hci_emit_security_level(con_handle, LEVEL_0); 2106 return; 2107 } 2108 gap_security_level_t current_level = gap_security_level(con_handle); 2109 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 2110 if (current_level >= requested_level){ 2111 hci_emit_security_level(con_handle, current_level); 2112 return; 2113 } 2114 2115 connection->requested_security_level = requested_level; 2116 2117 // would enabling ecnryption suffice (>= LEVEL_2)? 2118 if (hci_stack->remote_device_db){ 2119 link_key_type_t link_key_type; 2120 link_key_t link_key; 2121 if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 2122 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 2123 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2124 return; 2125 } 2126 } 2127 } 2128 2129 // try to authenticate connection 2130 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2131 hci_run(); 2132 } 2133 2134 /** 2135 * @brief start dedicated bonding with device. disconnect after bonding 2136 * @param device 2137 * @param request MITM protection 2138 * @result GAP_DEDICATED_BONDING_COMPLETE 2139 */ 2140 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 2141 2142 // create connection state machine 2143 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 2144 2145 if (!connection){ 2146 return BTSTACK_MEMORY_ALLOC_FAILED; 2147 } 2148 2149 // delete linkn key 2150 hci_drop_link_key_for_bd_addr( (bd_addr_t *) &device); 2151 2152 // configure LEVEL_2/3, dedicated bonding 2153 connection->state = SEND_CREATE_CONNECTION; 2154 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 2155 printf("gap_dedicated_bonding, mitm %u -> level %u\n", mitm_protection_required, connection->requested_security_level); 2156 connection->bonding_flags = BONDING_DEDICATED; 2157 2158 // wait for GAP Security Result and send GAP Dedicated Bonding complete 2159 2160 // handle: connnection failure (connection complete != ok) 2161 // handle: authentication failure 2162 // handle: disconnect on done 2163 2164 hci_run(); 2165 2166 return 0; 2167 } 2168 2169 void gap_set_local_name(const char * local_name){ 2170 hci_stack->local_name = local_name; 2171 } 2172 2173 le_command_status_t le_central_start_scan(){ 2174 if (hci_stack->le_scanning_state == LE_SCANNING) return BLE_PERIPHERAL_OK; 2175 hci_stack->le_scanning_state = LE_START_SCAN; 2176 hci_run(); 2177 return BLE_PERIPHERAL_OK; 2178 } 2179 2180 le_command_status_t le_central_stop_scan(){ 2181 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return BLE_PERIPHERAL_OK; 2182 hci_stack->le_scanning_state = LE_STOP_SCAN; 2183 hci_run(); 2184 return BLE_PERIPHERAL_OK; 2185 } 2186 2187 2188 le_command_status_t le_central_connect(bd_addr_t * addr, bd_addr_type_t addr_type){ 2189 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2190 log_info("le_central_connect, conn struct %p", conn); 2191 if (!conn){ 2192 conn = create_connection_for_bd_addr_and_type(*addr, addr_type); 2193 if (!conn){ 2194 // notify client that alloc failed 2195 hci_emit_le_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2196 return BLE_PERIPHERAL_NOT_CONNECTED; // don't sent packet to controller 2197 } 2198 conn->state = SEND_CREATE_CONNECTION; 2199 log_info("le_central_connect, state %u", conn->state); 2200 hci_run(); 2201 return BLE_PERIPHERAL_OK; 2202 } 2203 log_info("le_central_connect, state %u", conn->state); 2204 hci_emit_le_connection_complete(conn, 0); 2205 hci_run(); 2206 return BLE_PERIPHERAL_OK; 2207 } 2208 2209 le_command_status_t le_central_connect_cancel(){ 2210 // TODO implement 2211 return BLE_PERIPHERAL_OK; 2212 } 2213 2214 le_command_status_t gap_disconnect(hci_con_handle_t handle){ 2215 hci_connection_t * conn = hci_connection_for_handle(handle); 2216 if (!conn){ 2217 hci_emit_le_connection_complete(conn, 0); 2218 return BLE_PERIPHERAL_OK; 2219 } 2220 conn->state = SEND_DISCONNECT; 2221 hci_run(); 2222 return BLE_PERIPHERAL_OK; 2223 } 2224