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 int hci_is_le_connection(hci_connection_t * connection){ 211 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 212 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 213 } 214 215 216 /** 217 * count connections 218 */ 219 static int nr_hci_connections(void){ 220 int count = 0; 221 linked_item_t *it; 222 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 223 return count; 224 } 225 226 /** 227 * Dummy handler called by HCI 228 */ 229 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 230 } 231 232 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 233 hci_connection_t * connection = hci_connection_for_handle(handle); 234 if (!connection) { 235 log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 236 return 0; 237 } 238 return connection->num_acl_packets_sent; 239 } 240 241 uint8_t hci_number_free_acl_slots(){ 242 uint8_t free_slots = hci_stack->total_num_acl_packets; 243 linked_item_t *it; 244 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 245 hci_connection_t * connection = (hci_connection_t *) it; 246 if (free_slots < connection->num_acl_packets_sent) { 247 log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 248 return 0; 249 } 250 free_slots -= connection->num_acl_packets_sent; 251 } 252 return free_slots; 253 } 254 255 int hci_can_send_packet_now(uint8_t packet_type){ 256 257 // check for async hci transport implementations 258 if (hci_stack->hci_transport->can_send_packet_now){ 259 if (!hci_stack->hci_transport->can_send_packet_now(packet_type)){ 260 return 0; 261 } 262 } 263 264 // check regular Bluetooth flow control 265 switch (packet_type) { 266 case HCI_ACL_DATA_PACKET: 267 return hci_number_free_acl_slots(); 268 case HCI_COMMAND_DATA_PACKET: 269 return hci_stack->num_cmd_packets; 270 default: 271 return 0; 272 } 273 } 274 275 // same as hci_can_send_packet_now, but also checks if packet buffer is free for use 276 int hci_can_send_packet_now_using_packet_buffer(uint8_t packet_type){ 277 if (hci_stack->hci_packet_buffer_reserved) return 0; 278 return hci_can_send_packet_now(packet_type); 279 } 280 281 // used for internal checks in l2cap[-le].c 282 int hci_is_packet_buffer_reserved(void){ 283 return hci_stack->hci_packet_buffer_reserved; 284 } 285 286 // reserves outgoing packet buffer. @returns 1 if successful 287 int hci_reserve_packet_buffer(void){ 288 if (hci_stack->hci_packet_buffer_reserved) return 0; 289 hci_stack->hci_packet_buffer_reserved = 1; 290 return 1; 291 } 292 293 void hci_release_packet_buffer(void){ 294 hci_stack->hci_packet_buffer_reserved = 0; 295 } 296 297 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 298 int hci_transport_synchronous(void){ 299 return hci_stack->hci_transport->can_send_packet_now == NULL; 300 } 301 302 int hci_send_acl_packet(uint8_t *packet, int size){ 303 304 // check for free places on BT module 305 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 306 307 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 308 hci_connection_t *connection = hci_connection_for_handle( con_handle); 309 if (!connection) return 0; 310 hci_connection_timestamp(connection); 311 312 // count packet 313 connection->num_acl_packets_sent++; 314 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 315 316 // send packet 317 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 318 319 // free packet buffer for synchronous transport implementations 320 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 321 hci_stack->hci_packet_buffer_reserved = 0; 322 } 323 324 return err; 325 } 326 327 static void acl_handler(uint8_t *packet, int size){ 328 329 // log_info("acl_handler: size %u", size); 330 331 // get info 332 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 333 hci_connection_t *conn = hci_connection_for_handle(con_handle); 334 uint8_t acl_flags = READ_ACL_FLAGS(packet); 335 uint16_t acl_length = READ_ACL_LENGTH(packet); 336 337 // ignore non-registered handle 338 if (!conn){ 339 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 340 return; 341 } 342 343 // assert packet is complete 344 if (acl_length + 4 != size){ 345 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 346 return; 347 } 348 349 // update idle timestamp 350 hci_connection_timestamp(conn); 351 352 // handle different packet types 353 switch (acl_flags & 0x03) { 354 355 case 0x01: // continuation fragment 356 357 // sanity check 358 if (conn->acl_recombination_pos == 0) { 359 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 360 return; 361 } 362 363 // append fragment payload (header already stored) 364 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 365 conn->acl_recombination_pos += acl_length; 366 367 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 368 // conn->acl_recombination_pos, conn->acl_recombination_length); 369 370 // forward complete L2CAP packet if complete. 371 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 372 373 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 374 // reset recombination buffer 375 conn->acl_recombination_length = 0; 376 conn->acl_recombination_pos = 0; 377 } 378 break; 379 380 case 0x02: { // first fragment 381 382 // sanity check 383 if (conn->acl_recombination_pos) { 384 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 385 return; 386 } 387 388 // peek into L2CAP packet! 389 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 390 391 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 392 393 // compare fragment size to L2CAP packet size 394 if (acl_length >= l2cap_length + 4){ 395 396 // forward fragment as L2CAP packet 397 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 398 399 } else { 400 // store first fragment and tweak acl length for complete package 401 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 402 conn->acl_recombination_pos = acl_length + 4; 403 conn->acl_recombination_length = l2cap_length; 404 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 405 } 406 break; 407 408 } 409 default: 410 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 411 return; 412 } 413 414 // execute main loop 415 hci_run(); 416 } 417 418 static void hci_shutdown_connection(hci_connection_t *conn){ 419 log_info("Connection closed: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 420 421 run_loop_remove_timer(&conn->timeout); 422 423 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 424 btstack_memory_hci_connection_free( conn ); 425 426 // now it's gone 427 hci_emit_nr_connections_changed(); 428 } 429 430 static const uint16_t packet_type_sizes[] = { 431 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 432 HCI_ACL_DH1_SIZE, 0, 0, 0, 433 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 434 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 435 }; 436 static const uint8_t packet_type_feature_requirement_bit[] = { 437 0, // 3 slot packets 438 1, // 5 slot packets 439 25, // EDR 2 mpbs 440 26, // EDR 3 mbps 441 39, // 3 slot EDR packts 442 40, // 5 slot EDR packet 443 }; 444 static const uint16_t packet_type_feature_packet_mask[] = { 445 0x0f00, // 3 slot packets 446 0xf000, // 5 slot packets 447 0x1102, // EDR 2 mpbs 448 0x2204, // EDR 3 mbps 449 0x0300, // 3 slot EDR packts 450 0x3000, // 5 slot EDR packet 451 }; 452 453 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 454 // enable packet types based on size 455 uint16_t packet_types = 0; 456 int i; 457 for (i=0;i<16;i++){ 458 if (packet_type_sizes[i] == 0) continue; 459 if (packet_type_sizes[i] <= buffer_size){ 460 packet_types |= 1 << i; 461 } 462 } 463 // disable packet types due to missing local supported features 464 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 465 int bit_idx = packet_type_feature_requirement_bit[i]; 466 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 467 if (feature_set) continue; 468 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 469 packet_types &= ~packet_type_feature_packet_mask[i]; 470 } 471 // flip bits for "may not be used" 472 packet_types ^= 0x3306; 473 return packet_types; 474 } 475 476 uint16_t hci_usable_acl_packet_types(void){ 477 return hci_stack->packet_types; 478 } 479 480 uint8_t* hci_get_outgoing_packet_buffer(void){ 481 // hci packet buffer is >= acl data packet length 482 return hci_stack->hci_packet_buffer; 483 } 484 485 uint16_t hci_max_acl_data_packet_length(void){ 486 return hci_stack->acl_data_packet_length; 487 } 488 489 int hci_non_flushable_packet_boundary_flag_supported(void){ 490 // No. 54, byte 6, bit 6 491 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 492 } 493 494 int hci_ssp_supported(void){ 495 // No. 51, byte 6, bit 3 496 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 497 } 498 499 int hci_classic_supported(void){ 500 // No. 37, byte 4, bit 5, = No BR/EDR Support 501 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 502 } 503 504 int hci_le_supported(void){ 505 #ifdef HAVE_BLE 506 // No. 37, byte 4, bit 6 = LE Supported (Controller) 507 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 508 #else 509 return 0; 510 #endif 511 } 512 513 // get addr type and address used in advertisement packets 514 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t * addr){ 515 *addr_type = hci_stack->adv_addr_type; 516 if (hci_stack->adv_addr_type){ 517 memcpy(addr, hci_stack->adv_address, 6); 518 } else { 519 memcpy(addr, hci_stack->local_bd_addr, 6); 520 } 521 } 522 523 #ifdef HAVE_BLE 524 static void le_handle_advertisement_report(uint8_t *packet, int size){ 525 int num_reports = packet[3]; 526 int i; 527 int total_data_length = 0; 528 int data_offset = 0; 529 530 for (i=0; i<num_reports;i++){ 531 total_data_length += packet[4+num_reports*8+i]; 532 } 533 534 for (i=0; i<num_reports;i++){ 535 int pos = 0; 536 uint8_t data_length = packet[4+num_reports*8+i]; 537 uint8_t event_size = 10 + data_length; 538 uint8_t event[2 + event_size ]; 539 event[pos++] = GAP_LE_ADVERTISING_REPORT; 540 event[pos++] = event_size; 541 event[pos++] = packet[4+i]; // event_type; 542 event[pos++] = packet[4+num_reports+i]; // address_type; 543 memcpy(&event[pos], &packet[4+num_reports*2+i*6], 6); // bt address 544 pos += 6; 545 event[pos++] = packet[4+num_reports*9+total_data_length + i]; 546 event[pos++] = data_length; 547 memcpy(&event[pos], &packet[4+num_reports*9+data_offset], data_length); 548 data_offset += data_length; 549 pos += data_length; 550 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 551 } 552 } 553 #endif 554 555 // avoid huge local variables 556 #ifndef EMBEDDED 557 static device_name_t device_name; 558 #endif 559 static void event_handler(uint8_t *packet, int size){ 560 561 uint16_t event_length = packet[1]; 562 563 // assert packet is complete 564 if (size != event_length + 2){ 565 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 566 return; 567 } 568 569 bd_addr_t addr; 570 bd_addr_type_t addr_type; 571 uint8_t link_type; 572 hci_con_handle_t handle; 573 hci_connection_t * conn; 574 int i; 575 576 // printf("HCI:EVENT:%02x\n", packet[0]); 577 578 switch (packet[0]) { 579 580 case HCI_EVENT_COMMAND_COMPLETE: 581 // get num cmd packets 582 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack->num_cmd_packets, packet[2]); 583 hci_stack->num_cmd_packets = packet[2]; 584 585 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 586 // from offset 5 587 // status 588 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 589 hci_stack->acl_data_packet_length = READ_BT_16(packet, 6); 590 // ignore: SCO data packet len (8) 591 hci_stack->total_num_acl_packets = packet[9]; 592 // ignore: total num SCO packets 593 if (hci_stack->state == HCI_STATE_INITIALIZING){ 594 // determine usable ACL payload size 595 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 596 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 597 } 598 log_info("hci_read_buffer_size: used size %u, count %u\n", 599 hci_stack->acl_data_packet_length, hci_stack->total_num_acl_packets); 600 } 601 } 602 #ifdef HAVE_BLE 603 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 604 hci_stack->le_data_packet_length = READ_BT_16(packet, 6); 605 hci_stack->total_num_le_packets = packet[8]; 606 log_info("hci_le_read_buffer_size: size %u, count %u\n", hci_stack->le_data_packet_length, hci_stack->total_num_le_packets); 607 608 // use LE buffers if no clasic buffers have been reported 609 if (hci_stack->total_num_acl_packets == 0){ 610 log_info("use le buffers instead of classic ones"); 611 hci_stack->total_num_acl_packets = hci_stack->total_num_le_packets; 612 hci_stack->acl_data_packet_length = hci_stack->le_data_packet_length; 613 // determine usable ACL payload size 614 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 615 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 616 } 617 } 618 } 619 #endif 620 // Dump local address 621 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 622 bt_flip_addr(hci_stack->local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 623 log_info("Local Address, Status: 0x%02x: Addr: %s\n", 624 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 625 } 626 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 627 hci_emit_discoverable_enabled(hci_stack->discoverable); 628 } 629 // Note: HCI init checks 630 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 631 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 632 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 633 hci_stack->local_supported_features[0], hci_stack->local_supported_features[1], 634 hci_stack->local_supported_features[2], hci_stack->local_supported_features[3], 635 hci_stack->local_supported_features[4], hci_stack->local_supported_features[5], 636 hci_stack->local_supported_features[6], hci_stack->local_supported_features[7]); 637 638 // determine usable ACL packet types based buffer size and supported features 639 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]); 640 log_info("packet types %04x", hci_stack->packet_types); 641 642 // Classic/LE 643 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 644 } 645 break; 646 647 case HCI_EVENT_COMMAND_STATUS: 648 // get num cmd packets 649 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack->num_cmd_packets, packet[3]); 650 hci_stack->num_cmd_packets = packet[3]; 651 break; 652 653 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 654 for (i=0; i<packet[2];i++){ 655 handle = READ_BT_16(packet, 3 + 2*i); 656 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 657 conn = hci_connection_for_handle(handle); 658 if (!conn){ 659 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 660 continue; 661 } 662 conn->num_acl_packets_sent -= num_packets; 663 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 664 } 665 break; 666 667 case HCI_EVENT_CONNECTION_REQUEST: 668 bt_flip_addr(addr, &packet[2]); 669 // TODO: eval COD 8-10 670 link_type = packet[11]; 671 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 672 if (link_type == 1) { // ACL 673 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 674 if (!conn) { 675 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 676 } 677 if (!conn) { 678 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 679 hci_stack->decline_reason = 0x0d; 680 BD_ADDR_COPY(hci_stack->decline_addr, addr); 681 break; 682 } 683 conn->state = RECEIVED_CONNECTION_REQUEST; 684 hci_run(); 685 } else { 686 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 687 hci_stack->decline_reason = 0x0a; 688 BD_ADDR_COPY(hci_stack->decline_addr, addr); 689 } 690 break; 691 692 case HCI_EVENT_CONNECTION_COMPLETE: 693 // Connection management 694 bt_flip_addr(addr, &packet[5]); 695 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 696 addr_type = BD_ADDR_TYPE_CLASSIC; 697 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 698 if (conn) { 699 if (!packet[2]){ 700 conn->state = OPEN; 701 conn->con_handle = READ_BT_16(packet, 3); 702 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 703 704 // restart timer 705 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 706 run_loop_add_timer(&conn->timeout); 707 708 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 709 710 hci_emit_nr_connections_changed(); 711 } else { 712 // notify client if dedicated bonding 713 if (conn->bonding_flags & BONDING_DEDICATED){ 714 hci_emit_dedicated_bonding_result(conn, packet[2]); 715 } 716 717 // connection failed, remove entry 718 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 719 btstack_memory_hci_connection_free( conn ); 720 721 // if authentication error, also delete link key 722 if (packet[2] == 0x05) { 723 hci_drop_link_key_for_bd_addr(&addr); 724 } 725 } 726 } 727 break; 728 729 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 730 handle = READ_BT_16(packet, 3); 731 conn = hci_connection_for_handle(handle); 732 if (!conn) break; 733 if (!packet[2]){ 734 uint8_t * features = &packet[5]; 735 if (features[6] & (1 << 3)){ 736 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 737 } 738 } 739 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 740 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x", conn->bonding_flags); 741 if (conn->bonding_flags & BONDING_DEDICATED){ 742 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 743 } 744 break; 745 746 case HCI_EVENT_LINK_KEY_REQUEST: 747 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 748 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 749 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 750 if (hci_stack->bondable && !hci_stack->remote_device_db) break; 751 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 752 hci_run(); 753 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 754 return; 755 756 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 757 bt_flip_addr(addr, &packet[2]); 758 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 759 if (!conn) break; 760 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 761 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 762 // Change Connection Encryption keeps link key type 763 if (link_key_type != CHANGED_COMBINATION_KEY){ 764 conn->link_key_type = link_key_type; 765 } 766 if (!hci_stack->remote_device_db) break; 767 hci_stack->remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8], conn->link_key_type); 768 // still forward event to allow dismiss of pairing dialog 769 break; 770 } 771 772 case HCI_EVENT_PIN_CODE_REQUEST: 773 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 774 // non-bondable mode: pin code negative reply will be sent 775 if (!hci_stack->bondable){ 776 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 777 hci_run(); 778 return; 779 } 780 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 781 if (!hci_stack->remote_device_db) break; 782 bt_flip_addr(addr, &packet[2]); 783 hci_stack->remote_device_db->delete_link_key(&addr); 784 break; 785 786 case HCI_EVENT_IO_CAPABILITY_REQUEST: 787 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 788 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 789 break; 790 791 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 792 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 793 if (!hci_stack->ssp_auto_accept) break; 794 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 795 break; 796 797 case HCI_EVENT_USER_PASSKEY_REQUEST: 798 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 799 if (!hci_stack->ssp_auto_accept) break; 800 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 801 break; 802 803 case HCI_EVENT_ENCRYPTION_CHANGE: 804 handle = READ_BT_16(packet, 3); 805 conn = hci_connection_for_handle(handle); 806 if (!conn) break; 807 if (packet[2] == 0) { 808 if (packet[5]){ 809 conn->authentication_flags |= CONNECTION_ENCRYPTED; 810 } else { 811 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 812 } 813 } 814 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 815 break; 816 817 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 818 handle = READ_BT_16(packet, 3); 819 conn = hci_connection_for_handle(handle); 820 if (!conn) break; 821 822 // dedicated bonding: send result and disconnect 823 if (conn->bonding_flags & BONDING_DEDICATED){ 824 conn->bonding_flags &= ~BONDING_DEDICATED; 825 hci_emit_dedicated_bonding_result( conn, packet[2]); 826 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 827 break; 828 } 829 830 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 831 // link key sufficient for requested security 832 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 833 break; 834 } 835 // not enough 836 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 837 break; 838 839 #ifndef EMBEDDED 840 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 841 if (!hci_stack->remote_device_db) break; 842 if (packet[2]) break; // status not ok 843 bt_flip_addr(addr, &packet[3]); 844 // fix for invalid remote names - terminate on 0xff 845 for (i=0; i<248;i++){ 846 if (packet[9+i] == 0xff){ 847 packet[9+i] = 0; 848 break; 849 } 850 } 851 memset(&device_name, 0, sizeof(device_name_t)); 852 strncpy((char*) device_name, (char*) &packet[9], 248); 853 hci_stack->remote_device_db->put_name(&addr, &device_name); 854 break; 855 856 case HCI_EVENT_INQUIRY_RESULT: 857 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 858 if (!hci_stack->remote_device_db) break; 859 // first send inq result packet 860 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 861 // then send cached remote names 862 for (i=0; i<packet[2];i++){ 863 bt_flip_addr(addr, &packet[3+i*6]); 864 if (hci_stack->remote_device_db->get_name(&addr, &device_name)){ 865 hci_emit_remote_name_cached(&addr, &device_name); 866 } 867 } 868 return; 869 #endif 870 871 case HCI_EVENT_DISCONNECTION_COMPLETE: 872 if (!packet[2]){ 873 handle = READ_BT_16(packet, 3); 874 hci_connection_t * conn = hci_connection_for_handle(handle); 875 if (conn) { 876 hci_shutdown_connection(conn); 877 } 878 } 879 break; 880 881 case HCI_EVENT_HARDWARE_ERROR: 882 if(hci_stack->control && hci_stack->control->hw_error){ 883 (*hci_stack->control->hw_error)(); 884 } 885 break; 886 887 case DAEMON_EVENT_HCI_PACKET_SENT: 888 // free packet buffer for asynchronous transport 889 if (hci_transport_synchronous()) break; 890 hci_stack->hci_packet_buffer_reserved = 0; 891 break; 892 893 #ifdef HAVE_BLE 894 case HCI_EVENT_LE_META: 895 switch (packet[2]){ 896 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 897 if (hci_stack->le_scanning_state != LE_SCANNING) break; 898 le_handle_advertisement_report(packet, size); 899 break; 900 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 901 // Connection management 902 bt_flip_addr(addr, &packet[8]); 903 addr_type = (bd_addr_type_t)packet[7]; 904 log_info("LE Connection_complete (status=%u) type %u, %s\n", packet[3], addr_type, bd_addr_to_str(addr)); 905 // LE connections are auto-accepted, so just create a connection if there isn't one already 906 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 907 if (packet[3]){ 908 if (conn){ 909 // outgoing connection failed, remove entry 910 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 911 btstack_memory_hci_connection_free( conn ); 912 } 913 // if authentication error, also delete link key 914 if (packet[3] == 0x05) { 915 hci_drop_link_key_for_bd_addr(&addr); 916 } 917 break; 918 } 919 if (!conn){ 920 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 921 } 922 if (!conn){ 923 // no memory 924 break; 925 } 926 927 conn->state = OPEN; 928 conn->con_handle = READ_BT_16(packet, 4); 929 930 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 931 932 // restart timer 933 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 934 // run_loop_add_timer(&conn->timeout); 935 936 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 937 938 hci_emit_nr_connections_changed(); 939 break; 940 941 // printf("LE buffer size: %u, count %u\n", READ_BT_16(packet,6), packet[8]); 942 943 default: 944 break; 945 } 946 break; 947 #endif 948 949 default: 950 break; 951 } 952 953 // handle BT initialization 954 if (hci_stack->state == HCI_STATE_INITIALIZING){ 955 if (hci_stack->substate % 2){ 956 // odd: waiting for event 957 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 958 // wait for explicit COMMAND COMPLETE on RESET 959 if (hci_stack->substate > 1 || COMMAND_COMPLETE_EVENT(packet, hci_reset)) { 960 hci_stack->substate++; 961 } 962 } 963 964 // HACK to deal with duplicate HCI Reset Complete events seen on cheapo CSR8510 A10 USB Dongle 965 if (COMMAND_COMPLETE_EVENT(packet, hci_reset)){ 966 if (hci_stack->state == HCI_STATE_INITIALIZING) { 967 if (hci_stack->config == 0 || ((hci_uart_config_t *)hci_stack->config)->baudrate_main == 0){ 968 hci_stack->substate = 6; // >> 1 = 3 969 } else { 970 hci_stack->substate = 2; // >> 1 = 1 971 } 972 } 973 } 974 } 975 } 976 977 // help with BT sleep 978 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 979 && hci_stack->substate == 1 980 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 981 hci_stack->substate++; 982 } 983 984 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 985 986 // execute main loop 987 hci_run(); 988 } 989 990 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 991 switch (packet_type) { 992 case HCI_EVENT_PACKET: 993 event_handler(packet, size); 994 break; 995 case HCI_ACL_DATA_PACKET: 996 acl_handler(packet, size); 997 break; 998 default: 999 break; 1000 } 1001 } 1002 1003 /** Register HCI packet handlers */ 1004 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1005 hci_stack->packet_handler = handler; 1006 } 1007 1008 void hci_state_reset(){ 1009 // no connections yet 1010 hci_stack->connections = NULL; 1011 1012 // keep discoverable/connectable as this has been requested by the client(s) 1013 // hci_stack->discoverable = 0; 1014 // hci_stack->connectable = 0; 1015 // hci_stack->bondable = 1; 1016 1017 // no pending cmds 1018 hci_stack->decline_reason = 0; 1019 hci_stack->new_scan_enable_value = 0xff; 1020 1021 // LE 1022 hci_stack->adv_addr_type = 0; 1023 memset(hci_stack->adv_address, 0, 6); 1024 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1025 hci_stack->le_scan_type = 0xff; 1026 } 1027 1028 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 1029 1030 #ifdef HAVE_MALLOC 1031 if (!hci_stack) { 1032 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1033 } 1034 #else 1035 hci_stack = &hci_stack_static; 1036 #endif 1037 memset(hci_stack, 0, sizeof(hci_stack_t)); 1038 1039 // reference to use transport layer implementation 1040 hci_stack->hci_transport = transport; 1041 1042 // references to used control implementation 1043 hci_stack->control = control; 1044 1045 // reference to used config 1046 hci_stack->config = config; 1047 1048 // higher level handler 1049 hci_stack->packet_handler = dummy_handler; 1050 1051 // store and open remote device db 1052 hci_stack->remote_device_db = remote_device_db; 1053 if (hci_stack->remote_device_db) { 1054 hci_stack->remote_device_db->open(); 1055 } 1056 1057 // max acl payload size defined in config.h 1058 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1059 1060 // register packet handlers with transport 1061 transport->register_packet_handler(&packet_handler); 1062 1063 hci_stack->state = HCI_STATE_OFF; 1064 1065 // class of device 1066 hci_stack->class_of_device = 0x007a020c; // Smartphone 1067 1068 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1069 hci_stack->ssp_enable = 1; 1070 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1071 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1072 hci_stack->ssp_auto_accept = 1; 1073 1074 hci_state_reset(); 1075 } 1076 1077 void hci_close(){ 1078 // close remote device db 1079 if (hci_stack->remote_device_db) { 1080 hci_stack->remote_device_db->close(); 1081 } 1082 while (hci_stack->connections) { 1083 // cancel all l2cap connections 1084 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 1085 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1086 } 1087 hci_power_control(HCI_POWER_OFF); 1088 1089 #ifdef HAVE_MALLOC 1090 free(hci_stack); 1091 #endif 1092 hci_stack = NULL; 1093 } 1094 1095 void hci_set_class_of_device(uint32_t class_of_device){ 1096 hci_stack->class_of_device = class_of_device; 1097 } 1098 1099 void hci_disable_l2cap_timeout_check(){ 1100 disable_l2cap_timeouts = 1; 1101 } 1102 // State-Module-Driver overview 1103 // state module low-level 1104 // HCI_STATE_OFF off close 1105 // HCI_STATE_INITIALIZING, on open 1106 // HCI_STATE_WORKING, on open 1107 // HCI_STATE_HALTING, on open 1108 // HCI_STATE_SLEEPING, off/sleep close 1109 // HCI_STATE_FALLING_ASLEEP on open 1110 1111 static int hci_power_control_on(void){ 1112 1113 // power on 1114 int err = 0; 1115 if (hci_stack->control && hci_stack->control->on){ 1116 err = (*hci_stack->control->on)(hci_stack->config); 1117 } 1118 if (err){ 1119 log_error( "POWER_ON failed\n"); 1120 hci_emit_hci_open_failed(); 1121 return err; 1122 } 1123 1124 // open low-level device 1125 err = hci_stack->hci_transport->open(hci_stack->config); 1126 if (err){ 1127 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1128 if (hci_stack->control && hci_stack->control->off){ 1129 (*hci_stack->control->off)(hci_stack->config); 1130 } 1131 hci_emit_hci_open_failed(); 1132 return err; 1133 } 1134 return 0; 1135 } 1136 1137 static void hci_power_control_off(void){ 1138 1139 log_info("hci_power_control_off\n"); 1140 1141 // close low-level device 1142 hci_stack->hci_transport->close(hci_stack->config); 1143 1144 log_info("hci_power_control_off - hci_transport closed\n"); 1145 1146 // power off 1147 if (hci_stack->control && hci_stack->control->off){ 1148 (*hci_stack->control->off)(hci_stack->config); 1149 } 1150 1151 log_info("hci_power_control_off - control closed\n"); 1152 1153 hci_stack->state = HCI_STATE_OFF; 1154 } 1155 1156 static void hci_power_control_sleep(void){ 1157 1158 log_info("hci_power_control_sleep\n"); 1159 1160 #if 0 1161 // don't close serial port during sleep 1162 1163 // close low-level device 1164 hci_stack->hci_transport->close(hci_stack->config); 1165 #endif 1166 1167 // sleep mode 1168 if (hci_stack->control && hci_stack->control->sleep){ 1169 (*hci_stack->control->sleep)(hci_stack->config); 1170 } 1171 1172 hci_stack->state = HCI_STATE_SLEEPING; 1173 } 1174 1175 static int hci_power_control_wake(void){ 1176 1177 log_info("hci_power_control_wake\n"); 1178 1179 // wake on 1180 if (hci_stack->control && hci_stack->control->wake){ 1181 (*hci_stack->control->wake)(hci_stack->config); 1182 } 1183 1184 #if 0 1185 // open low-level device 1186 int err = hci_stack->hci_transport->open(hci_stack->config); 1187 if (err){ 1188 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1189 if (hci_stack->control && hci_stack->control->off){ 1190 (*hci_stack->control->off)(hci_stack->config); 1191 } 1192 hci_emit_hci_open_failed(); 1193 return err; 1194 } 1195 #endif 1196 1197 return 0; 1198 } 1199 1200 1201 int hci_power_control(HCI_POWER_MODE power_mode){ 1202 1203 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack->state); 1204 1205 int err = 0; 1206 switch (hci_stack->state){ 1207 1208 case HCI_STATE_OFF: 1209 switch (power_mode){ 1210 case HCI_POWER_ON: 1211 err = hci_power_control_on(); 1212 if (err) return err; 1213 // set up state machine 1214 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1215 hci_stack->state = HCI_STATE_INITIALIZING; 1216 hci_stack->substate = 0; 1217 break; 1218 case HCI_POWER_OFF: 1219 // do nothing 1220 break; 1221 case HCI_POWER_SLEEP: 1222 // do nothing (with SLEEP == OFF) 1223 break; 1224 } 1225 break; 1226 1227 case HCI_STATE_INITIALIZING: 1228 switch (power_mode){ 1229 case HCI_POWER_ON: 1230 // do nothing 1231 break; 1232 case HCI_POWER_OFF: 1233 // no connections yet, just turn it off 1234 hci_power_control_off(); 1235 break; 1236 case HCI_POWER_SLEEP: 1237 // no connections yet, just turn it off 1238 hci_power_control_sleep(); 1239 break; 1240 } 1241 break; 1242 1243 case HCI_STATE_WORKING: 1244 switch (power_mode){ 1245 case HCI_POWER_ON: 1246 // do nothing 1247 break; 1248 case HCI_POWER_OFF: 1249 // see hci_run 1250 hci_stack->state = HCI_STATE_HALTING; 1251 break; 1252 case HCI_POWER_SLEEP: 1253 // see hci_run 1254 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1255 hci_stack->substate = 0; 1256 break; 1257 } 1258 break; 1259 1260 case HCI_STATE_HALTING: 1261 switch (power_mode){ 1262 case HCI_POWER_ON: 1263 // set up state machine 1264 hci_stack->state = HCI_STATE_INITIALIZING; 1265 hci_stack->substate = 0; 1266 break; 1267 case HCI_POWER_OFF: 1268 // do nothing 1269 break; 1270 case HCI_POWER_SLEEP: 1271 // see hci_run 1272 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1273 hci_stack->substate = 0; 1274 break; 1275 } 1276 break; 1277 1278 case HCI_STATE_FALLING_ASLEEP: 1279 switch (power_mode){ 1280 case HCI_POWER_ON: 1281 1282 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1283 // nothing to do, if H4 supports power management 1284 if (bt_control_iphone_power_management_enabled()){ 1285 hci_stack->state = HCI_STATE_INITIALIZING; 1286 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1287 break; 1288 } 1289 #endif 1290 // set up state machine 1291 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1292 hci_stack->state = HCI_STATE_INITIALIZING; 1293 hci_stack->substate = 0; 1294 break; 1295 case HCI_POWER_OFF: 1296 // see hci_run 1297 hci_stack->state = HCI_STATE_HALTING; 1298 break; 1299 case HCI_POWER_SLEEP: 1300 // do nothing 1301 break; 1302 } 1303 break; 1304 1305 case HCI_STATE_SLEEPING: 1306 switch (power_mode){ 1307 case HCI_POWER_ON: 1308 1309 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1310 // nothing to do, if H4 supports power management 1311 if (bt_control_iphone_power_management_enabled()){ 1312 hci_stack->state = HCI_STATE_INITIALIZING; 1313 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1314 hci_update_scan_enable(); 1315 break; 1316 } 1317 #endif 1318 err = hci_power_control_wake(); 1319 if (err) return err; 1320 // set up state machine 1321 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1322 hci_stack->state = HCI_STATE_INITIALIZING; 1323 hci_stack->substate = 0; 1324 break; 1325 case HCI_POWER_OFF: 1326 hci_stack->state = HCI_STATE_HALTING; 1327 break; 1328 case HCI_POWER_SLEEP: 1329 // do nothing 1330 break; 1331 } 1332 break; 1333 } 1334 1335 // create internal event 1336 hci_emit_state(); 1337 1338 // trigger next/first action 1339 hci_run(); 1340 1341 return 0; 1342 } 1343 1344 static void hci_update_scan_enable(void){ 1345 // 2 = page scan, 1 = inq scan 1346 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 1347 hci_run(); 1348 } 1349 1350 void hci_discoverable_control(uint8_t enable){ 1351 if (enable) enable = 1; // normalize argument 1352 1353 if (hci_stack->discoverable == enable){ 1354 hci_emit_discoverable_enabled(hci_stack->discoverable); 1355 return; 1356 } 1357 1358 hci_stack->discoverable = enable; 1359 hci_update_scan_enable(); 1360 } 1361 1362 void hci_connectable_control(uint8_t enable){ 1363 if (enable) enable = 1; // normalize argument 1364 1365 // don't emit event 1366 if (hci_stack->connectable == enable) return; 1367 1368 hci_stack->connectable = enable; 1369 hci_update_scan_enable(); 1370 } 1371 1372 bd_addr_t * hci_local_bd_addr(void){ 1373 return &hci_stack->local_bd_addr; 1374 } 1375 1376 void hci_run(){ 1377 1378 hci_connection_t * connection; 1379 linked_item_t * it; 1380 1381 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1382 1383 // global/non-connection oriented commands 1384 1385 // decline incoming connections 1386 if (hci_stack->decline_reason){ 1387 uint8_t reason = hci_stack->decline_reason; 1388 hci_stack->decline_reason = 0; 1389 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 1390 return; 1391 } 1392 1393 // send scan enable 1394 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 1395 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1396 hci_stack->new_scan_enable_value = 0xff; 1397 return; 1398 } 1399 1400 #ifdef HAVE_BLE 1401 // handle le scan 1402 if (hci_stack->state == HCI_STATE_WORKING){ 1403 switch(hci_stack->le_scanning_state){ 1404 case LE_START_SCAN: 1405 hci_stack->le_scanning_state = LE_SCANNING; 1406 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 1407 return; 1408 1409 case LE_STOP_SCAN: 1410 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1411 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 1412 return; 1413 default: 1414 break; 1415 } 1416 if (hci_stack->le_scan_type != 0xff){ 1417 // defaults: active scanning, accept all advertisement packets 1418 int scan_type = hci_stack->le_scan_type; 1419 hci_stack->le_scan_type = 0xff; 1420 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); 1421 return; 1422 } 1423 } 1424 #endif 1425 1426 // send pending HCI commands 1427 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 1428 connection = (hci_connection_t *) it; 1429 1430 switch(connection->state){ 1431 case SEND_CREATE_CONNECTION: 1432 switch(connection->address_type){ 1433 case BD_ADDR_TYPE_CLASSIC: 1434 log_info("sending hci_create_connection\n"); 1435 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 1436 break; 1437 default: 1438 #ifdef HAVE_BLE 1439 log_info("sending hci_le_create_connection\n"); 1440 hci_send_cmd(&hci_le_create_connection, 1441 0x0060, // scan interval: 60 ms 1442 0x0030, // scan interval: 30 ms 1443 0, // don't use whitelist 1444 connection->address_type, // peer address type 1445 connection->address, // peer bd addr 1446 hci_stack->adv_addr_type, // our addr type: 1447 0x0008, // conn interval min 1448 0x0018, // conn interval max 1449 0, // conn latency 1450 0x0048, // supervision timeout 1451 0x0001, // min ce length 1452 0x0001 // max ce length 1453 ); 1454 1455 connection->state = SENT_CREATE_CONNECTION; 1456 #endif 1457 break; 1458 } 1459 return; 1460 1461 case RECEIVED_CONNECTION_REQUEST: 1462 log_info("sending hci_accept_connection_request\n"); 1463 connection->state = ACCEPTED_CONNECTION_REQUEST; 1464 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1465 return; 1466 1467 #ifdef HAVE_BLE 1468 case SEND_CANCEL_CONNECTION: 1469 connection->state = SENT_CANCEL_CONNECTION; 1470 hci_send_cmd(&hci_le_create_connection_cancel); 1471 return; 1472 #endif 1473 case SEND_DISCONNECT: 1474 connection->state = SENT_DISCONNECT; 1475 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1476 return; 1477 1478 default: 1479 break; 1480 } 1481 1482 1483 1484 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1485 log_info("responding to link key request\n"); 1486 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1487 link_key_t link_key; 1488 link_key_type_t link_key_type; 1489 if ( hci_stack->remote_device_db 1490 && hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type) 1491 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 1492 connection->link_key_type = link_key_type; 1493 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1494 } else { 1495 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1496 } 1497 return; 1498 } 1499 1500 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 1501 log_info("denying to pin request\n"); 1502 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 1503 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 1504 return; 1505 } 1506 1507 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1508 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1509 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 1510 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 1511 // tweak authentication requirements 1512 uint8_t authreq = hci_stack->ssp_authentication_requirement; 1513 if (connection->bonding_flags & BONDING_DEDICATED){ 1514 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 1515 } 1516 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 1517 authreq |= 1; 1518 } 1519 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 1520 } else { 1521 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 1522 } 1523 return; 1524 } 1525 1526 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1527 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1528 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1529 return; 1530 } 1531 1532 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1533 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1534 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1535 return; 1536 } 1537 1538 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 1539 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 1540 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 1541 return; 1542 } 1543 1544 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 1545 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 1546 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 1547 return; 1548 } 1549 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 1550 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 1551 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 1552 return; 1553 } 1554 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 1555 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 1556 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 1557 return; 1558 } 1559 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 1560 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 1561 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 1562 return; 1563 } 1564 } 1565 1566 switch (hci_stack->state){ 1567 case HCI_STATE_INITIALIZING: 1568 // log_info("hci_init: substate %u\n", hci_stack->substate); 1569 if (hci_stack->substate % 2) { 1570 // odd: waiting for command completion 1571 return; 1572 } 1573 switch (hci_stack->substate >> 1){ 1574 case 0: // RESET 1575 hci_state_reset(); 1576 1577 hci_send_cmd(&hci_reset); 1578 if (hci_stack->config == 0 || ((hci_uart_config_t *)hci_stack->config)->baudrate_main == 0){ 1579 // skip baud change 1580 hci_stack->substate = 4; // >> 1 = 2 1581 } 1582 break; 1583 case 1: // SEND BAUD CHANGE 1584 hci_stack->control->baudrate_cmd(hci_stack->config, ((hci_uart_config_t *)hci_stack->config)->baudrate_main, hci_stack->hci_packet_buffer); 1585 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1586 break; 1587 case 2: // LOCAL BAUD CHANGE 1588 hci_stack->hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack->config)->baudrate_main); 1589 hci_stack->substate += 2; 1590 // break missing here for fall through 1591 1592 case 3: 1593 // Custom initialization 1594 if (hci_stack->control && hci_stack->control->next_cmd){ 1595 int valid_cmd = (*hci_stack->control->next_cmd)(hci_stack->config, hci_stack->hci_packet_buffer); 1596 if (valid_cmd){ 1597 int size = 3 + hci_stack->hci_packet_buffer[2]; 1598 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1599 hci_stack->substate = 4; // more init commands 1600 break; 1601 } 1602 log_info("hci_run: init script done\n\r"); 1603 } 1604 // otherwise continue 1605 hci_send_cmd(&hci_read_bd_addr); 1606 break; 1607 case 4: 1608 hci_send_cmd(&hci_read_buffer_size); 1609 break; 1610 case 5: 1611 hci_send_cmd(&hci_read_local_supported_features); 1612 break; 1613 case 6: 1614 if (hci_le_supported()){ 1615 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1616 } else { 1617 // Kensington Bluetoot 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1618 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1619 } 1620 1621 // skip Classic init commands for LE only chipsets 1622 if (!hci_classic_supported()){ 1623 if (hci_le_supported()){ 1624 hci_stack->substate = 11 << 1; // skip all classic command 1625 } else { 1626 log_error("Neither BR/EDR nor LE supported"); 1627 hci_stack->substate = 14 << 1; // skip all 1628 } 1629 } 1630 break; 1631 case 7: 1632 if (hci_ssp_supported()){ 1633 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1634 break; 1635 } 1636 hci_stack->substate += 2; 1637 // break missing here for fall through 1638 1639 case 8: 1640 // ca. 15 sec 1641 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1642 break; 1643 case 9: 1644 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1645 break; 1646 case 10: 1647 if (hci_stack->local_name){ 1648 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1649 } else { 1650 char hostname[30]; 1651 #ifdef EMBEDDED 1652 // BTstack-11:22:33:44:55:66 1653 strcpy(hostname, "BTstack "); 1654 strcat(hostname, bd_addr_to_str(hci_stack->local_bd_addr)); 1655 printf("---> Name %s\n", hostname); 1656 #else 1657 // hostname for POSIX systems 1658 gethostname(hostname, 30); 1659 hostname[29] = '\0'; 1660 #endif 1661 hci_send_cmd(&hci_write_local_name, hostname); 1662 } 1663 break; 1664 case 11: 1665 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1666 if (!hci_le_supported()){ 1667 // SKIP LE init for Classic only configuration 1668 hci_stack->substate = 14 << 1; 1669 } 1670 break; 1671 1672 #ifdef HAVE_BLE 1673 // LE INIT 1674 case 12: 1675 hci_send_cmd(&hci_le_read_buffer_size); 1676 break; 1677 case 13: 1678 // LE Supported Host = 1, Simultaneous Host = 0 1679 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1680 break; 1681 case 14: 1682 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1683 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1684 break; 1685 #endif 1686 1687 // DONE 1688 case 15: 1689 // done. 1690 hci_stack->state = HCI_STATE_WORKING; 1691 hci_emit_state(); 1692 break; 1693 default: 1694 break; 1695 } 1696 hci_stack->substate++; 1697 break; 1698 1699 case HCI_STATE_HALTING: 1700 1701 log_info("HCI_STATE_HALTING\n"); 1702 // close all open connections 1703 connection = (hci_connection_t *) hci_stack->connections; 1704 if (connection){ 1705 1706 // send disconnect 1707 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1708 1709 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1710 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1711 1712 // send disconnected event right away - causes higher layer connections to get closed, too. 1713 hci_shutdown_connection(connection); 1714 return; 1715 } 1716 log_info("HCI_STATE_HALTING, calling off\n"); 1717 1718 // switch mode 1719 hci_power_control_off(); 1720 1721 log_info("HCI_STATE_HALTING, emitting state\n"); 1722 hci_emit_state(); 1723 log_info("HCI_STATE_HALTING, done\n"); 1724 break; 1725 1726 case HCI_STATE_FALLING_ASLEEP: 1727 switch(hci_stack->substate) { 1728 case 0: 1729 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1730 // close all open connections 1731 connection = (hci_connection_t *) hci_stack->connections; 1732 1733 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1734 // don't close connections, if H4 supports power management 1735 if (bt_control_iphone_power_management_enabled()){ 1736 connection = NULL; 1737 } 1738 #endif 1739 if (connection){ 1740 1741 // send disconnect 1742 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1743 1744 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1745 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1746 1747 // send disconnected event right away - causes higher layer connections to get closed, too. 1748 hci_shutdown_connection(connection); 1749 return; 1750 } 1751 1752 if (hci_classic_supported()){ 1753 // disable page and inquiry scan 1754 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1755 1756 log_info("HCI_STATE_HALTING, disabling inq scans\n"); 1757 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 1758 1759 // continue in next sub state 1760 hci_stack->substate++; 1761 break; 1762 } 1763 // fall through for ble-only chips 1764 1765 case 2: 1766 log_info("HCI_STATE_HALTING, calling sleep\n"); 1767 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1768 // don't actually go to sleep, if H4 supports power management 1769 if (bt_control_iphone_power_management_enabled()){ 1770 // SLEEP MODE reached 1771 hci_stack->state = HCI_STATE_SLEEPING; 1772 hci_emit_state(); 1773 break; 1774 } 1775 #endif 1776 // switch mode 1777 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 1778 hci_emit_state(); 1779 break; 1780 1781 default: 1782 break; 1783 } 1784 break; 1785 1786 default: 1787 break; 1788 } 1789 } 1790 1791 int hci_send_cmd_packet(uint8_t *packet, int size){ 1792 bd_addr_t addr; 1793 hci_connection_t * conn; 1794 // house-keeping 1795 1796 // create_connection? 1797 if (IS_COMMAND(packet, hci_create_connection)){ 1798 bt_flip_addr(addr, &packet[3]); 1799 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1800 1801 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1802 if (!conn){ 1803 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1804 if (!conn){ 1805 // notify client that alloc failed 1806 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1807 return 0; // don't sent packet to controller 1808 } 1809 conn->state = SEND_CREATE_CONNECTION; 1810 } 1811 log_info("conn state %u", conn->state); 1812 switch (conn->state){ 1813 // if connection active exists 1814 case OPEN: 1815 // and OPEN, emit connection complete command, don't send to controller 1816 hci_emit_connection_complete(conn, 0); 1817 return 0; 1818 case SEND_CREATE_CONNECTION: 1819 // connection created by hci, e.g. dedicated bonding 1820 break; 1821 default: 1822 // otherwise, just ignore as it is already in the open process 1823 return 0; 1824 } 1825 conn->state = SENT_CREATE_CONNECTION; 1826 } 1827 1828 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1829 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1830 } 1831 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1832 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1833 } 1834 1835 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1836 if (hci_stack->remote_device_db){ 1837 bt_flip_addr(addr, &packet[3]); 1838 hci_stack->remote_device_db->delete_link_key(&addr); 1839 } 1840 } 1841 1842 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 1843 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 1844 bt_flip_addr(addr, &packet[3]); 1845 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1846 if (conn){ 1847 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 1848 } 1849 } 1850 1851 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 1852 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 1853 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 1854 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 1855 bt_flip_addr(addr, &packet[3]); 1856 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1857 if (conn){ 1858 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 1859 } 1860 } 1861 1862 #ifdef HAVE_BLE 1863 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 1864 hci_stack->adv_addr_type = packet[8]; 1865 } 1866 if (IS_COMMAND(packet, hci_le_set_random_address)){ 1867 bt_flip_addr(hci_stack->adv_address, &packet[3]); 1868 } 1869 #endif 1870 1871 hci_stack->num_cmd_packets--; 1872 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1873 1874 // free packet buffer for synchronous transport implementations 1875 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 1876 hci_stack->hci_packet_buffer_reserved = 0; 1877 } 1878 1879 return err; 1880 } 1881 1882 // disconnect because of security block 1883 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 1884 hci_connection_t * connection = hci_connection_for_handle(con_handle); 1885 if (!connection) return; 1886 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 1887 } 1888 1889 1890 // Configure Secure Simple Pairing 1891 1892 // enable will enable SSP during init 1893 void hci_ssp_set_enable(int enable){ 1894 hci_stack->ssp_enable = enable; 1895 } 1896 1897 int hci_local_ssp_activated(){ 1898 return hci_ssp_supported() && hci_stack->ssp_enable; 1899 } 1900 1901 // if set, BTstack will respond to io capability request using authentication requirement 1902 void hci_ssp_set_io_capability(int io_capability){ 1903 hci_stack->ssp_io_capability = io_capability; 1904 } 1905 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 1906 hci_stack->ssp_authentication_requirement = authentication_requirement; 1907 } 1908 1909 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 1910 void hci_ssp_set_auto_accept(int auto_accept){ 1911 hci_stack->ssp_auto_accept = auto_accept; 1912 } 1913 1914 /** 1915 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1916 */ 1917 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1918 va_list argptr; 1919 va_start(argptr, cmd); 1920 uint16_t size = hci_create_cmd_internal(hci_stack->hci_packet_buffer, cmd, argptr); 1921 va_end(argptr); 1922 return hci_send_cmd_packet(hci_stack->hci_packet_buffer, size); 1923 } 1924 1925 // Create various non-HCI events. 1926 // TODO: generalize, use table similar to hci_create_command 1927 1928 void hci_emit_state(){ 1929 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 1930 uint8_t event[3]; 1931 event[0] = BTSTACK_EVENT_STATE; 1932 event[1] = sizeof(event) - 2; 1933 event[2] = hci_stack->state; 1934 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1935 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1936 } 1937 1938 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1939 uint8_t event[13]; 1940 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1941 event[1] = sizeof(event) - 2; 1942 event[2] = status; 1943 bt_store_16(event, 3, conn->con_handle); 1944 bt_flip_addr(&event[5], conn->address); 1945 event[11] = 1; // ACL connection 1946 event[12] = 0; // encryption disabled 1947 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1948 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1949 } 1950 1951 void hci_emit_le_connection_complete(hci_connection_t *conn, uint8_t status){ 1952 uint8_t event[21]; 1953 event[0] = HCI_EVENT_LE_META; 1954 event[1] = sizeof(event) - 2; 1955 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 1956 event[3] = status; 1957 bt_store_16(event, 4, conn->con_handle); 1958 event[6] = 0; // TODO: role 1959 event[7] = conn->address_type; 1960 bt_flip_addr(&event[8], conn->address); 1961 bt_store_16(event, 14, 0); // interval 1962 bt_store_16(event, 16, 0); // latency 1963 bt_store_16(event, 18, 0); // supervision timeout 1964 event[20] = 0; // master clock accuracy 1965 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1966 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1967 } 1968 1969 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1970 uint8_t event[6]; 1971 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1972 event[1] = sizeof(event) - 2; 1973 event[2] = 0; // status = OK 1974 bt_store_16(event, 3, handle); 1975 event[5] = reason; 1976 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1977 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1978 } 1979 1980 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1981 if (disable_l2cap_timeouts) return; 1982 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 1983 uint8_t event[4]; 1984 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1985 event[1] = sizeof(event) - 2; 1986 bt_store_16(event, 2, conn->con_handle); 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_nr_connections_changed(){ 1992 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 1993 uint8_t event[3]; 1994 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1995 event[1] = sizeof(event) - 2; 1996 event[2] = nr_hci_connections(); 1997 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1998 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1999 } 2000 2001 void hci_emit_hci_open_failed(){ 2002 log_info("BTSTACK_EVENT_POWERON_FAILED"); 2003 uint8_t event[2]; 2004 event[0] = BTSTACK_EVENT_POWERON_FAILED; 2005 event[1] = sizeof(event) - 2; 2006 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2007 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2008 } 2009 2010 #ifndef EMBEDDED 2011 void hci_emit_btstack_version() { 2012 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 2013 uint8_t event[6]; 2014 event[0] = BTSTACK_EVENT_VERSION; 2015 event[1] = sizeof(event) - 2; 2016 event[2] = BTSTACK_MAJOR; 2017 event[3] = BTSTACK_MINOR; 2018 bt_store_16(event, 4, BTSTACK_REVISION); 2019 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2020 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2021 } 2022 #endif 2023 2024 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 2025 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 2026 uint8_t event[3]; 2027 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 2028 event[1] = sizeof(event) - 2; 2029 event[2] = enabled; 2030 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2031 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2032 } 2033 2034 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 2035 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 2036 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 2037 event[1] = sizeof(event) - 2 - 1; 2038 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 2039 bt_flip_addr(&event[3], *addr); 2040 memcpy(&event[9], name, 248); 2041 2042 event[9+248] = 0; // assert \0 for log_info 2043 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 2044 2045 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 2046 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 2047 } 2048 2049 void hci_emit_discoverable_enabled(uint8_t enabled){ 2050 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 2051 uint8_t event[3]; 2052 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 2053 event[1] = sizeof(event) - 2; 2054 event[2] = enabled; 2055 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2056 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2057 } 2058 2059 void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 2060 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 2061 uint8_t event[5]; 2062 int pos = 0; 2063 event[pos++] = GAP_SECURITY_LEVEL; 2064 event[pos++] = sizeof(event) - 2; 2065 bt_store_16(event, 2, con_handle); 2066 pos += 2; 2067 event[pos++] = level; 2068 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2069 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2070 } 2071 2072 void hci_emit_dedicated_bonding_result(hci_connection_t * connection, uint8_t status){ 2073 log_info("hci_emit_dedicated_bonding_result %u ", status); 2074 uint8_t event[9]; 2075 int pos = 0; 2076 event[pos++] = GAP_DEDICATED_BONDING_COMPLETED; 2077 event[pos++] = sizeof(event) - 2; 2078 event[pos++] = status; 2079 bt_flip_addr( * (bd_addr_t *) &event[pos], connection->address); 2080 pos += 6; 2081 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2082 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2083 } 2084 2085 // query if remote side supports SSP 2086 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 2087 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2088 if (!connection) return 0; 2089 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 2090 } 2091 2092 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 2093 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 2094 } 2095 2096 // GAP API 2097 /** 2098 * @bbrief enable/disable bonding. default is enabled 2099 * @praram enabled 2100 */ 2101 void gap_set_bondable_mode(int enable){ 2102 hci_stack->bondable = enable ? 1 : 0; 2103 } 2104 2105 /** 2106 * @brief map link keys to security levels 2107 */ 2108 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 2109 switch (link_key_type){ 2110 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 2111 return LEVEL_4; 2112 case COMBINATION_KEY: 2113 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 2114 return LEVEL_3; 2115 default: 2116 return LEVEL_2; 2117 } 2118 } 2119 2120 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 2121 if (!connection) return LEVEL_0; 2122 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 2123 return gap_security_level_for_link_key_type(connection->link_key_type); 2124 } 2125 2126 2127 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 2128 printf("gap_mitm_protection_required_for_security_level %u\n", level); 2129 return level > LEVEL_2; 2130 } 2131 2132 /** 2133 * @brief get current security level 2134 */ 2135 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 2136 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2137 if (!connection) return LEVEL_0; 2138 return gap_security_level_for_connection(connection); 2139 } 2140 2141 /** 2142 * @brief request connection to device to 2143 * @result GAP_AUTHENTICATION_RESULT 2144 */ 2145 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 2146 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2147 if (!connection){ 2148 hci_emit_security_level(con_handle, LEVEL_0); 2149 return; 2150 } 2151 gap_security_level_t current_level = gap_security_level(con_handle); 2152 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 2153 if (current_level >= requested_level){ 2154 hci_emit_security_level(con_handle, current_level); 2155 return; 2156 } 2157 2158 connection->requested_security_level = requested_level; 2159 2160 // would enabling ecnryption suffice (>= LEVEL_2)? 2161 if (hci_stack->remote_device_db){ 2162 link_key_type_t link_key_type; 2163 link_key_t link_key; 2164 if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 2165 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 2166 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2167 return; 2168 } 2169 } 2170 } 2171 2172 // try to authenticate connection 2173 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2174 hci_run(); 2175 } 2176 2177 /** 2178 * @brief start dedicated bonding with device. disconnect after bonding 2179 * @param device 2180 * @param request MITM protection 2181 * @result GAP_DEDICATED_BONDING_COMPLETE 2182 */ 2183 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 2184 2185 // create connection state machine 2186 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 2187 2188 if (!connection){ 2189 return BTSTACK_MEMORY_ALLOC_FAILED; 2190 } 2191 2192 // delete linkn key 2193 hci_drop_link_key_for_bd_addr( (bd_addr_t *) &device); 2194 2195 // configure LEVEL_2/3, dedicated bonding 2196 connection->state = SEND_CREATE_CONNECTION; 2197 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 2198 printf("gap_dedicated_bonding, mitm %u -> level %u\n", mitm_protection_required, connection->requested_security_level); 2199 connection->bonding_flags = BONDING_DEDICATED; 2200 2201 // wait for GAP Security Result and send GAP Dedicated Bonding complete 2202 2203 // handle: connnection failure (connection complete != ok) 2204 // handle: authentication failure 2205 // handle: disconnect on done 2206 2207 hci_run(); 2208 2209 return 0; 2210 } 2211 2212 void gap_set_local_name(const char * local_name){ 2213 hci_stack->local_name = local_name; 2214 } 2215 2216 le_command_status_t le_central_start_scan(){ 2217 if (hci_stack->le_scanning_state == LE_SCANNING) return BLE_PERIPHERAL_OK; 2218 hci_stack->le_scanning_state = LE_START_SCAN; 2219 hci_run(); 2220 return BLE_PERIPHERAL_OK; 2221 } 2222 2223 le_command_status_t le_central_stop_scan(){ 2224 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return BLE_PERIPHERAL_OK; 2225 hci_stack->le_scanning_state = LE_STOP_SCAN; 2226 hci_run(); 2227 return BLE_PERIPHERAL_OK; 2228 } 2229 2230 void le_central_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 2231 hci_stack->le_scan_type = scan_type; 2232 hci_stack->le_scan_interval = scan_interval; 2233 hci_stack->le_scan_window = scan_window; 2234 hci_run(); 2235 } 2236 2237 le_command_status_t le_central_connect(bd_addr_t * addr, bd_addr_type_t addr_type){ 2238 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2239 log_info("le_central_connect, conn struct %p", conn); 2240 if (!conn){ 2241 conn = create_connection_for_bd_addr_and_type(*addr, addr_type); 2242 if (!conn){ 2243 // notify client that alloc failed 2244 hci_emit_le_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2245 return BLE_PERIPHERAL_NOT_CONNECTED; // don't sent packet to controller 2246 } 2247 conn->state = SEND_CREATE_CONNECTION; 2248 log_info("le_central_connect, state %u", conn->state); 2249 hci_run(); 2250 return BLE_PERIPHERAL_OK; 2251 } 2252 2253 if (!hci_is_le_connection(conn) || 2254 conn->state == SEND_CREATE_CONNECTION || 2255 conn->state == SENT_CREATE_CONNECTION) { 2256 hci_emit_le_connection_complete(conn, ERROR_CODE_COMMAND_DISALLOWED); 2257 return BLE_PERIPHERAL_IN_WRONG_STATE; 2258 } 2259 2260 log_info("le_central_connect, state %u", conn->state); 2261 hci_emit_le_connection_complete(conn, 0); 2262 hci_run(); 2263 return BLE_PERIPHERAL_OK; 2264 } 2265 2266 // @assumption: only a single outgoing LE Connection exists 2267 static hci_connection_t * le_central_get_outgoing_connection(){ 2268 linked_item_t *it; 2269 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 2270 hci_connection_t * conn = (hci_connection_t *) it; 2271 if (!hci_is_le_connection(conn)) continue; 2272 switch (conn->state){ 2273 case SEND_CREATE_CONNECTION: 2274 case SENT_CREATE_CONNECTION: 2275 return conn; 2276 default: 2277 break; 2278 }; 2279 } 2280 return NULL; 2281 } 2282 2283 le_command_status_t le_central_connect_cancel(){ 2284 hci_connection_t * conn = le_central_get_outgoing_connection(); 2285 switch (conn->state){ 2286 case SEND_CREATE_CONNECTION: 2287 // skip sending create connection and emit event instead 2288 hci_emit_le_connection_complete(conn, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 2289 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 2290 btstack_memory_hci_connection_free( conn ); 2291 break; 2292 case SENT_CREATE_CONNECTION: 2293 // request to send cancel connection 2294 conn->state = SEND_CANCEL_CONNECTION; 2295 hci_run(); 2296 break; 2297 default: 2298 break; 2299 } 2300 return BLE_PERIPHERAL_OK; 2301 } 2302 2303 le_command_status_t gap_disconnect(hci_con_handle_t handle){ 2304 hci_connection_t * conn = hci_connection_for_handle(handle); 2305 if (!conn){ 2306 hci_emit_disconnection_complete(handle, 0); 2307 return BLE_PERIPHERAL_OK; 2308 } 2309 conn->state = SEND_DISCONNECT; 2310 hci_run(); 2311 return BLE_PERIPHERAL_OK; 2312 } 2313