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_ssp_supported(void){ 488 // No 51, byte 6, bit 3 489 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 490 } 491 492 int hci_classic_supported(void){ 493 // No 37, byte 4, bit 5, = No BR/EDR Support 494 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 495 } 496 497 int hci_le_supported(void){ 498 // No 37, byte 4, bit 6 = LE Supported (Controller) 499 #ifdef HAVE_BLE 500 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 501 #else 502 return 0; 503 #endif 504 } 505 506 // get addr type and address used in advertisement packets 507 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t * addr){ 508 *addr_type = hci_stack->adv_addr_type; 509 if (hci_stack->adv_addr_type){ 510 memcpy(addr, hci_stack->adv_address, 6); 511 } else { 512 memcpy(addr, hci_stack->local_bd_addr, 6); 513 } 514 } 515 516 // avoid huge local variables 517 #ifndef EMBEDDED 518 static device_name_t device_name; 519 #endif 520 static void event_handler(uint8_t *packet, int size){ 521 522 uint16_t event_length = packet[1]; 523 524 // assert packet is complete 525 if (size != event_length + 2){ 526 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 527 return; 528 } 529 530 bd_addr_t addr; 531 bd_addr_type_t addr_type; 532 uint8_t link_type; 533 hci_con_handle_t handle; 534 hci_connection_t * conn; 535 int i; 536 537 // printf("HCI:EVENT:%02x\n", packet[0]); 538 539 switch (packet[0]) { 540 541 case HCI_EVENT_COMMAND_COMPLETE: 542 // get num cmd packets 543 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack->num_cmd_packets, packet[2]); 544 hci_stack->num_cmd_packets = packet[2]; 545 546 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 547 // from offset 5 548 // status 549 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 550 hci_stack->acl_data_packet_length = READ_BT_16(packet, 6); 551 // ignore: SCO data packet len (8) 552 hci_stack->total_num_acl_packets = packet[9]; 553 // ignore: total num SCO packets 554 if (hci_stack->state == HCI_STATE_INITIALIZING){ 555 // determine usable ACL payload size 556 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 557 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 558 } 559 log_info("hci_read_buffer_size: used size %u, count %u\n", 560 hci_stack->acl_data_packet_length, hci_stack->total_num_acl_packets); 561 } 562 } 563 #ifdef HAVE_BLE 564 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 565 hci_stack->le_data_packet_length = READ_BT_16(packet, 6); 566 hci_stack->total_num_le_packets = packet[8]; 567 log_info("hci_le_read_buffer_size: size %u, count %u\n", hci_stack->le_data_packet_length, hci_stack->total_num_le_packets); 568 } 569 #endif 570 // Dump local address 571 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 572 bt_flip_addr(hci_stack->local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 573 log_info("Local Address, Status: 0x%02x: Addr: %s\n", 574 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 575 } 576 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 577 hci_emit_discoverable_enabled(hci_stack->discoverable); 578 } 579 // Note: HCI init checks 580 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 581 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 582 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 583 hci_stack->local_supported_features[0], hci_stack->local_supported_features[1], 584 hci_stack->local_supported_features[2], hci_stack->local_supported_features[3], 585 hci_stack->local_supported_features[4], hci_stack->local_supported_features[5], 586 hci_stack->local_supported_features[6], hci_stack->local_supported_features[7]); 587 588 // determine usable ACL packet types based buffer size and supported features 589 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]); 590 log_info("packet types %04x", hci_stack->packet_types); 591 592 // Classic/LE 593 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 594 } 595 break; 596 597 case HCI_EVENT_COMMAND_STATUS: 598 // get num cmd packets 599 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack->num_cmd_packets, packet[3]); 600 hci_stack->num_cmd_packets = packet[3]; 601 break; 602 603 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 604 for (i=0; i<packet[2];i++){ 605 handle = READ_BT_16(packet, 3 + 2*i); 606 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 607 conn = hci_connection_for_handle(handle); 608 if (!conn){ 609 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 610 continue; 611 } 612 conn->num_acl_packets_sent -= num_packets; 613 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 614 } 615 break; 616 617 case HCI_EVENT_CONNECTION_REQUEST: 618 bt_flip_addr(addr, &packet[2]); 619 // TODO: eval COD 8-10 620 link_type = packet[11]; 621 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 622 if (link_type == 1) { // ACL 623 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 624 if (!conn) { 625 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 626 } 627 if (!conn) { 628 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 629 hci_stack->decline_reason = 0x0d; 630 BD_ADDR_COPY(hci_stack->decline_addr, addr); 631 break; 632 } 633 conn->state = RECEIVED_CONNECTION_REQUEST; 634 hci_run(); 635 } else { 636 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 637 hci_stack->decline_reason = 0x0a; 638 BD_ADDR_COPY(hci_stack->decline_addr, addr); 639 } 640 break; 641 642 case HCI_EVENT_CONNECTION_COMPLETE: 643 // Connection management 644 bt_flip_addr(addr, &packet[5]); 645 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 646 addr_type = BD_ADDR_TYPE_CLASSIC; 647 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 648 if (conn) { 649 if (!packet[2]){ 650 conn->state = OPEN; 651 conn->con_handle = READ_BT_16(packet, 3); 652 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 653 654 // restart timer 655 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 656 run_loop_add_timer(&conn->timeout); 657 658 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 659 660 hci_emit_nr_connections_changed(); 661 } else { 662 // notify client if dedicated bonding 663 if (conn->bonding_flags & BONDING_DEDICATED){ 664 hci_emit_dedicated_bonding_result(conn, packet[2]); 665 } 666 667 // connection failed, remove entry 668 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 669 btstack_memory_hci_connection_free( conn ); 670 671 // if authentication error, also delete link key 672 if (packet[2] == 0x05) { 673 hci_drop_link_key_for_bd_addr(&addr); 674 } 675 } 676 } 677 break; 678 679 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 680 handle = READ_BT_16(packet, 3); 681 conn = hci_connection_for_handle(handle); 682 if (!conn) break; 683 if (!packet[2]){ 684 uint8_t * features = &packet[5]; 685 if (features[6] & (1 << 3)){ 686 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 687 } 688 } 689 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 690 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x", conn->bonding_flags); 691 if (conn->bonding_flags & BONDING_DEDICATED){ 692 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 693 } 694 break; 695 696 case HCI_EVENT_LINK_KEY_REQUEST: 697 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 698 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 699 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 700 if (hci_stack->bondable && !hci_stack->remote_device_db) break; 701 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 702 hci_run(); 703 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 704 return; 705 706 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 707 bt_flip_addr(addr, &packet[2]); 708 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 709 if (!conn) break; 710 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 711 link_key_type_t link_key_type = packet[24]; 712 // Change Connection Encryption keeps link key type 713 if (link_key_type != CHANGED_COMBINATION_KEY){ 714 conn->link_key_type = link_key_type; 715 } 716 if (!hci_stack->remote_device_db) break; 717 hci_stack->remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8], conn->link_key_type); 718 // still forward event to allow dismiss of pairing dialog 719 break; 720 } 721 722 case HCI_EVENT_PIN_CODE_REQUEST: 723 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 724 // non-bondable mode: pin code negative reply will be sent 725 if (!hci_stack->bondable){ 726 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 727 hci_run(); 728 return; 729 } 730 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 731 if (!hci_stack->remote_device_db) break; 732 bt_flip_addr(addr, &packet[2]); 733 hci_stack->remote_device_db->delete_link_key(&addr); 734 break; 735 736 case HCI_EVENT_IO_CAPABILITY_REQUEST: 737 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 738 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 739 break; 740 741 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 742 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 743 if (!hci_stack->ssp_auto_accept) break; 744 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 745 break; 746 747 case HCI_EVENT_USER_PASSKEY_REQUEST: 748 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 749 if (!hci_stack->ssp_auto_accept) break; 750 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 751 break; 752 753 case HCI_EVENT_ENCRYPTION_CHANGE: 754 handle = READ_BT_16(packet, 3); 755 conn = hci_connection_for_handle(handle); 756 if (!conn) break; 757 if (packet[2] == 0) { 758 if (packet[5]){ 759 conn->authentication_flags |= CONNECTION_ENCRYPTED; 760 } else { 761 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 762 } 763 } 764 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 765 break; 766 767 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 768 handle = READ_BT_16(packet, 3); 769 conn = hci_connection_for_handle(handle); 770 if (!conn) break; 771 772 // dedicated bonding: send result and disconnect 773 if (conn->bonding_flags & BONDING_DEDICATED){ 774 conn->bonding_flags &= ~BONDING_DEDICATED; 775 hci_emit_dedicated_bonding_result( conn, packet[2]); 776 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 777 break; 778 } 779 780 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 781 // link key sufficient for requested security 782 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 783 break; 784 } 785 // not enough 786 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 787 break; 788 789 #ifndef EMBEDDED 790 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 791 if (!hci_stack->remote_device_db) break; 792 if (packet[2]) break; // status not ok 793 bt_flip_addr(addr, &packet[3]); 794 // fix for invalid remote names - terminate on 0xff 795 for (i=0; i<248;i++){ 796 if (packet[9+i] == 0xff){ 797 packet[9+i] = 0; 798 break; 799 } 800 } 801 memset(&device_name, 0, sizeof(device_name_t)); 802 strncpy((char*) device_name, (char*) &packet[9], 248); 803 hci_stack->remote_device_db->put_name(&addr, &device_name); 804 break; 805 806 case HCI_EVENT_INQUIRY_RESULT: 807 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 808 if (!hci_stack->remote_device_db) break; 809 // first send inq result packet 810 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 811 // then send cached remote names 812 for (i=0; i<packet[2];i++){ 813 bt_flip_addr(addr, &packet[3+i*6]); 814 if (hci_stack->remote_device_db->get_name(&addr, &device_name)){ 815 hci_emit_remote_name_cached(&addr, &device_name); 816 } 817 } 818 return; 819 #endif 820 821 case HCI_EVENT_DISCONNECTION_COMPLETE: 822 if (!packet[2]){ 823 handle = READ_BT_16(packet, 3); 824 hci_connection_t * conn = hci_connection_for_handle(handle); 825 if (conn) { 826 hci_shutdown_connection(conn); 827 } 828 } 829 break; 830 831 case HCI_EVENT_HARDWARE_ERROR: 832 if(hci_stack->control && hci_stack->control->hw_error){ 833 (*hci_stack->control->hw_error)(); 834 } 835 break; 836 837 case DAEMON_EVENT_HCI_PACKET_SENT: 838 // free packet buffer for asynchronous transport 839 if (hci_transport_synchronous()) break; 840 hci_stack->hci_packet_buffer_reserved = 0; 841 break; 842 843 #ifdef HAVE_BLE 844 case HCI_EVENT_LE_META: 845 switch (packet[2]) { 846 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 847 // Connection management 848 bt_flip_addr(addr, &packet[8]); 849 addr_type = packet[7]; 850 log_info("LE Connection_complete (status=%u) type %u, %s\n", packet[3], addr_type, bd_addr_to_str(addr)); 851 // LE connections are auto-accepted, so just create a connection if there isn't one already 852 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 853 if (packet[3]){ 854 if (conn){ 855 // outgoing connection failed, remove entry 856 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 857 btstack_memory_hci_connection_free( conn ); 858 859 } 860 // if authentication error, also delete link key 861 if (packet[3] == 0x05) { 862 hci_drop_link_key_for_bd_addr(&addr); 863 } 864 break; 865 } 866 if (!conn){ 867 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 868 } 869 if (!conn){ 870 // no memory 871 break; 872 } 873 874 conn->state = OPEN; 875 conn->con_handle = READ_BT_16(packet, 4); 876 877 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 878 879 // restart timer 880 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 881 // run_loop_add_timer(&conn->timeout); 882 883 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 884 885 hci_emit_nr_connections_changed(); 886 break; 887 888 // printf("LE buffer size: %u, count %u\n", READ_BT_16(packet,6), packet[8]); 889 890 default: 891 break; 892 } 893 break; 894 #endif 895 896 default: 897 break; 898 } 899 900 // handle BT initialization 901 if (hci_stack->state == HCI_STATE_INITIALIZING){ 902 if (hci_stack->substate % 2){ 903 // odd: waiting for event 904 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 905 // wait for explicit COMMAND COMPLETE on RESET 906 if (hci_stack->substate > 1 || COMMAND_COMPLETE_EVENT(packet, hci_reset)) { 907 hci_stack->substate++; 908 } 909 } 910 } 911 } 912 913 // help with BT sleep 914 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 915 && hci_stack->substate == 1 916 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 917 hci_stack->substate++; 918 } 919 920 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 921 922 // execute main loop 923 hci_run(); 924 } 925 926 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 927 switch (packet_type) { 928 case HCI_EVENT_PACKET: 929 event_handler(packet, size); 930 break; 931 case HCI_ACL_DATA_PACKET: 932 acl_handler(packet, size); 933 break; 934 default: 935 break; 936 } 937 } 938 939 /** Register HCI packet handlers */ 940 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 941 hci_stack->packet_handler = handler; 942 } 943 944 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 945 946 #ifdef HAVE_MALLOC 947 if (!hci_stack) { 948 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 949 } 950 #else 951 hci_stack = &hci_stack_static; 952 #endif 953 memset(hci_stack, 0, sizeof(hci_stack_t)); 954 955 // reference to use transport layer implementation 956 hci_stack->hci_transport = transport; 957 958 // references to used control implementation 959 hci_stack->control = control; 960 961 // reference to used config 962 hci_stack->config = config; 963 964 // no connections yet 965 hci_stack->connections = NULL; 966 hci_stack->discoverable = 0; 967 hci_stack->connectable = 0; 968 hci_stack->bondable = 1; 969 970 // no pending cmds 971 hci_stack->decline_reason = 0; 972 hci_stack->new_scan_enable_value = 0xff; 973 974 // higher level handler 975 hci_stack->packet_handler = dummy_handler; 976 977 // store and open remote device db 978 hci_stack->remote_device_db = remote_device_db; 979 if (hci_stack->remote_device_db) { 980 hci_stack->remote_device_db->open(); 981 } 982 983 // max acl payload size defined in config.h 984 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 985 986 // register packet handlers with transport 987 transport->register_packet_handler(&packet_handler); 988 989 hci_stack->state = HCI_STATE_OFF; 990 991 // class of device 992 hci_stack->class_of_device = 0x007a020c; // Smartphone 993 994 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 995 hci_stack->ssp_enable = 1; 996 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 997 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 998 hci_stack->ssp_auto_accept = 1; 999 1000 // LE 1001 hci_stack->adv_addr_type = 0; 1002 memset(hci_stack->adv_address, 0, 6); 1003 } 1004 1005 void hci_close(){ 1006 // close remote device db 1007 if (hci_stack->remote_device_db) { 1008 hci_stack->remote_device_db->close(); 1009 } 1010 while (hci_stack->connections) { 1011 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1012 } 1013 hci_power_control(HCI_POWER_OFF); 1014 1015 #ifdef HAVE_MALLOC 1016 free(hci_stack); 1017 #endif 1018 hci_stack = NULL; 1019 } 1020 1021 void hci_set_class_of_device(uint32_t class_of_device){ 1022 hci_stack->class_of_device = class_of_device; 1023 } 1024 1025 void hci_disable_l2cap_timeout_check(){ 1026 disable_l2cap_timeouts = 1; 1027 } 1028 // State-Module-Driver overview 1029 // state module low-level 1030 // HCI_STATE_OFF off close 1031 // HCI_STATE_INITIALIZING, on open 1032 // HCI_STATE_WORKING, on open 1033 // HCI_STATE_HALTING, on open 1034 // HCI_STATE_SLEEPING, off/sleep close 1035 // HCI_STATE_FALLING_ASLEEP on open 1036 1037 static int hci_power_control_on(void){ 1038 1039 // power on 1040 int err = 0; 1041 if (hci_stack->control && hci_stack->control->on){ 1042 err = (*hci_stack->control->on)(hci_stack->config); 1043 } 1044 if (err){ 1045 log_error( "POWER_ON failed\n"); 1046 hci_emit_hci_open_failed(); 1047 return err; 1048 } 1049 1050 // open low-level device 1051 err = hci_stack->hci_transport->open(hci_stack->config); 1052 if (err){ 1053 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1054 if (hci_stack->control && hci_stack->control->off){ 1055 (*hci_stack->control->off)(hci_stack->config); 1056 } 1057 hci_emit_hci_open_failed(); 1058 return err; 1059 } 1060 return 0; 1061 } 1062 1063 static void hci_power_control_off(void){ 1064 1065 log_info("hci_power_control_off\n"); 1066 1067 // close low-level device 1068 hci_stack->hci_transport->close(hci_stack->config); 1069 1070 log_info("hci_power_control_off - hci_transport closed\n"); 1071 1072 // power off 1073 if (hci_stack->control && hci_stack->control->off){ 1074 (*hci_stack->control->off)(hci_stack->config); 1075 } 1076 1077 log_info("hci_power_control_off - control closed\n"); 1078 1079 hci_stack->state = HCI_STATE_OFF; 1080 } 1081 1082 static void hci_power_control_sleep(void){ 1083 1084 log_info("hci_power_control_sleep\n"); 1085 1086 #if 0 1087 // don't close serial port during sleep 1088 1089 // close low-level device 1090 hci_stack->hci_transport->close(hci_stack->config); 1091 #endif 1092 1093 // sleep mode 1094 if (hci_stack->control && hci_stack->control->sleep){ 1095 (*hci_stack->control->sleep)(hci_stack->config); 1096 } 1097 1098 hci_stack->state = HCI_STATE_SLEEPING; 1099 } 1100 1101 static int hci_power_control_wake(void){ 1102 1103 log_info("hci_power_control_wake\n"); 1104 1105 // wake on 1106 if (hci_stack->control && hci_stack->control->wake){ 1107 (*hci_stack->control->wake)(hci_stack->config); 1108 } 1109 1110 #if 0 1111 // open low-level device 1112 int err = hci_stack->hci_transport->open(hci_stack->config); 1113 if (err){ 1114 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1115 if (hci_stack->control && hci_stack->control->off){ 1116 (*hci_stack->control->off)(hci_stack->config); 1117 } 1118 hci_emit_hci_open_failed(); 1119 return err; 1120 } 1121 #endif 1122 1123 return 0; 1124 } 1125 1126 1127 int hci_power_control(HCI_POWER_MODE power_mode){ 1128 1129 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack->state); 1130 1131 int err = 0; 1132 switch (hci_stack->state){ 1133 1134 case HCI_STATE_OFF: 1135 switch (power_mode){ 1136 case HCI_POWER_ON: 1137 err = hci_power_control_on(); 1138 if (err) return err; 1139 // set up state machine 1140 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1141 hci_stack->state = HCI_STATE_INITIALIZING; 1142 hci_stack->substate = 0; 1143 break; 1144 case HCI_POWER_OFF: 1145 // do nothing 1146 break; 1147 case HCI_POWER_SLEEP: 1148 // do nothing (with SLEEP == OFF) 1149 break; 1150 } 1151 break; 1152 1153 case HCI_STATE_INITIALIZING: 1154 switch (power_mode){ 1155 case HCI_POWER_ON: 1156 // do nothing 1157 break; 1158 case HCI_POWER_OFF: 1159 // no connections yet, just turn it off 1160 hci_power_control_off(); 1161 break; 1162 case HCI_POWER_SLEEP: 1163 // no connections yet, just turn it off 1164 hci_power_control_sleep(); 1165 break; 1166 } 1167 break; 1168 1169 case HCI_STATE_WORKING: 1170 switch (power_mode){ 1171 case HCI_POWER_ON: 1172 // do nothing 1173 break; 1174 case HCI_POWER_OFF: 1175 // see hci_run 1176 hci_stack->state = HCI_STATE_HALTING; 1177 break; 1178 case HCI_POWER_SLEEP: 1179 // see hci_run 1180 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1181 hci_stack->substate = 0; 1182 break; 1183 } 1184 break; 1185 1186 case HCI_STATE_HALTING: 1187 switch (power_mode){ 1188 case HCI_POWER_ON: 1189 // set up state machine 1190 hci_stack->state = HCI_STATE_INITIALIZING; 1191 hci_stack->substate = 0; 1192 break; 1193 case HCI_POWER_OFF: 1194 // do nothing 1195 break; 1196 case HCI_POWER_SLEEP: 1197 // see hci_run 1198 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1199 hci_stack->substate = 0; 1200 break; 1201 } 1202 break; 1203 1204 case HCI_STATE_FALLING_ASLEEP: 1205 switch (power_mode){ 1206 case HCI_POWER_ON: 1207 1208 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1209 // nothing to do, if H4 supports power management 1210 if (bt_control_iphone_power_management_enabled()){ 1211 hci_stack->state = HCI_STATE_INITIALIZING; 1212 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1213 break; 1214 } 1215 #endif 1216 // set up state machine 1217 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1218 hci_stack->state = HCI_STATE_INITIALIZING; 1219 hci_stack->substate = 0; 1220 break; 1221 case HCI_POWER_OFF: 1222 // see hci_run 1223 hci_stack->state = HCI_STATE_HALTING; 1224 break; 1225 case HCI_POWER_SLEEP: 1226 // do nothing 1227 break; 1228 } 1229 break; 1230 1231 case HCI_STATE_SLEEPING: 1232 switch (power_mode){ 1233 case HCI_POWER_ON: 1234 1235 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1236 // nothing to do, if H4 supports power management 1237 if (bt_control_iphone_power_management_enabled()){ 1238 hci_stack->state = HCI_STATE_INITIALIZING; 1239 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1240 hci_update_scan_enable(); 1241 break; 1242 } 1243 #endif 1244 err = hci_power_control_wake(); 1245 if (err) return err; 1246 // set up state machine 1247 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1248 hci_stack->state = HCI_STATE_INITIALIZING; 1249 hci_stack->substate = 0; 1250 break; 1251 case HCI_POWER_OFF: 1252 hci_stack->state = HCI_STATE_HALTING; 1253 break; 1254 case HCI_POWER_SLEEP: 1255 // do nothing 1256 break; 1257 } 1258 break; 1259 } 1260 1261 // create internal event 1262 hci_emit_state(); 1263 1264 // trigger next/first action 1265 hci_run(); 1266 1267 return 0; 1268 } 1269 1270 static void hci_update_scan_enable(void){ 1271 // 2 = page scan, 1 = inq scan 1272 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 1273 hci_run(); 1274 } 1275 1276 void hci_discoverable_control(uint8_t enable){ 1277 if (enable) enable = 1; // normalize argument 1278 1279 if (hci_stack->discoverable == enable){ 1280 hci_emit_discoverable_enabled(hci_stack->discoverable); 1281 return; 1282 } 1283 1284 hci_stack->discoverable = enable; 1285 hci_update_scan_enable(); 1286 } 1287 1288 void hci_connectable_control(uint8_t enable){ 1289 if (enable) enable = 1; // normalize argument 1290 1291 // don't emit event 1292 if (hci_stack->connectable == enable) return; 1293 1294 hci_stack->connectable = enable; 1295 hci_update_scan_enable(); 1296 } 1297 1298 bd_addr_t * hci_local_bd_addr(void){ 1299 return &hci_stack->local_bd_addr; 1300 } 1301 1302 void hci_run(){ 1303 1304 hci_connection_t * connection; 1305 linked_item_t * it; 1306 1307 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1308 1309 // global/non-connection oriented commands 1310 1311 // decline incoming connections 1312 if (hci_stack->decline_reason){ 1313 uint8_t reason = hci_stack->decline_reason; 1314 hci_stack->decline_reason = 0; 1315 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 1316 return; 1317 } 1318 1319 // send scan enable 1320 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 1321 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1322 hci_stack->new_scan_enable_value = 0xff; 1323 return; 1324 } 1325 1326 // send pending HCI commands 1327 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 1328 1329 connection = (hci_connection_t *) it; 1330 1331 if (connection->state == SEND_CREATE_CONNECTION){ 1332 log_info("sending hci_create_connection\n"); 1333 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 1334 return; 1335 } 1336 1337 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 1338 log_info("sending hci_accept_connection_request\n"); 1339 connection->state = ACCEPTED_CONNECTION_REQUEST; 1340 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1341 return; 1342 } 1343 1344 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1345 log_info("responding to link key request\n"); 1346 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1347 link_key_t link_key; 1348 link_key_type_t link_key_type; 1349 if ( hci_stack->remote_device_db 1350 && hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type) 1351 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 1352 connection->link_key_type = link_key_type; 1353 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1354 } else { 1355 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1356 } 1357 return; 1358 } 1359 1360 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 1361 log_info("denying to pin request\n"); 1362 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 1363 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 1364 return; 1365 } 1366 1367 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1368 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1369 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 1370 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 1371 // tweak authentication requirements 1372 uint8_t authreq = hci_stack->ssp_authentication_requirement; 1373 if (connection->bonding_flags & BONDING_DEDICATED){ 1374 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 1375 } 1376 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 1377 authreq |= 1; 1378 } 1379 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 1380 } else { 1381 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 1382 } 1383 return; 1384 } 1385 1386 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1387 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1388 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1389 return; 1390 } 1391 1392 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1393 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1394 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1395 return; 1396 } 1397 1398 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 1399 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 1400 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 1401 return; 1402 } 1403 1404 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 1405 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 1406 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 1407 return; 1408 } 1409 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 1410 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 1411 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 1412 return; 1413 } 1414 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 1415 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 1416 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 1417 return; 1418 } 1419 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 1420 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 1421 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 1422 return; 1423 } 1424 } 1425 1426 switch (hci_stack->state){ 1427 case HCI_STATE_INITIALIZING: 1428 // log_info("hci_init: substate %u\n", hci_stack->substate); 1429 if (hci_stack->substate % 2) { 1430 // odd: waiting for command completion 1431 return; 1432 } 1433 switch (hci_stack->substate >> 1){ 1434 case 0: // RESET 1435 hci_send_cmd(&hci_reset); 1436 1437 if (hci_stack->config == 0 || ((hci_uart_config_t *)hci_stack->config)->baudrate_main == 0){ 1438 // skip baud change 1439 hci_stack->substate = 4; // >> 1 = 2 1440 } 1441 break; 1442 case 1: // SEND BAUD CHANGE 1443 hci_stack->control->baudrate_cmd(hci_stack->config, ((hci_uart_config_t *)hci_stack->config)->baudrate_main, hci_stack->hci_packet_buffer); 1444 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1445 break; 1446 case 2: // LOCAL BAUD CHANGE 1447 hci_stack->hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack->config)->baudrate_main); 1448 hci_stack->substate += 2; 1449 // break missing here for fall through 1450 1451 case 3: 1452 // Custom initialization 1453 if (hci_stack->control && hci_stack->control->next_cmd){ 1454 int valid_cmd = (*hci_stack->control->next_cmd)(hci_stack->config, hci_stack->hci_packet_buffer); 1455 if (valid_cmd){ 1456 int size = 3 + hci_stack->hci_packet_buffer[2]; 1457 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1458 hci_stack->substate = 4; // more init commands 1459 break; 1460 } 1461 log_info("hci_run: init script done\n\r"); 1462 } 1463 // otherwise continue 1464 hci_send_cmd(&hci_read_bd_addr); 1465 break; 1466 case 4: 1467 hci_send_cmd(&hci_read_buffer_size); 1468 break; 1469 case 5: 1470 hci_send_cmd(&hci_read_local_supported_features); 1471 break; 1472 case 6: 1473 if (hci_le_supported()){ 1474 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1475 } else { 1476 // Kensington Bluetoot 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1477 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1478 } 1479 1480 // skip Classic init commands for LE only chipsets 1481 if (!hci_classic_supported()){ 1482 if (hci_le_supported()){ 1483 hci_stack->substate = 11 << 1; // skip all classic command 1484 } else { 1485 log_error("Neither BR/EDR nor LE supported"); 1486 hci_stack->substate = 13 << 1; // skip all 1487 } 1488 } 1489 break; 1490 case 7: 1491 if (hci_ssp_supported()){ 1492 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1493 break; 1494 } 1495 hci_stack->substate += 2; 1496 // break missing here for fall through 1497 1498 case 8: 1499 // ca. 15 sec 1500 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1501 break; 1502 case 9: 1503 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1504 break; 1505 case 10: 1506 if (hci_stack->local_name){ 1507 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1508 } else { 1509 char hostname[30]; 1510 #ifdef EMBEDDED 1511 // BTstack-11:22:33:44:55:66 1512 strcpy(hostname, "BTstack "); 1513 strcat(hostname, bd_addr_to_str(hci_stack->local_bd_addr)); 1514 printf("---> Name %s\n", hostname); 1515 #else 1516 // hostname for POSIX systems 1517 gethostname(hostname, 30); 1518 hostname[29] = '\0'; 1519 #endif 1520 hci_send_cmd(&hci_write_local_name, hostname); 1521 } 1522 break; 1523 case 11: 1524 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1525 if (!hci_le_supported()){ 1526 // SKIP LE init for Classic only configuration 1527 hci_stack->substate = 13 << 1; 1528 } 1529 break; 1530 1531 #ifdef HAVE_BLE 1532 // LE INIT 1533 case 12: 1534 hci_send_cmd(&hci_le_read_buffer_size); 1535 break; 1536 case 13: 1537 // LE Supported Host = 1, Simultaneous Host = 0 1538 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1539 break; 1540 #endif 1541 1542 // DONE 1543 case 14: 1544 // done. 1545 hci_stack->state = HCI_STATE_WORKING; 1546 hci_emit_state(); 1547 break; 1548 default: 1549 break; 1550 } 1551 hci_stack->substate++; 1552 break; 1553 1554 case HCI_STATE_HALTING: 1555 1556 log_info("HCI_STATE_HALTING\n"); 1557 // close all open connections 1558 connection = (hci_connection_t *) hci_stack->connections; 1559 if (connection){ 1560 1561 // send disconnect 1562 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1563 1564 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1565 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1566 1567 // send disconnected event right away - causes higher layer connections to get closed, too. 1568 hci_shutdown_connection(connection); 1569 return; 1570 } 1571 log_info("HCI_STATE_HALTING, calling off\n"); 1572 1573 // switch mode 1574 hci_power_control_off(); 1575 1576 log_info("HCI_STATE_HALTING, emitting state\n"); 1577 hci_emit_state(); 1578 log_info("HCI_STATE_HALTING, done\n"); 1579 break; 1580 1581 case HCI_STATE_FALLING_ASLEEP: 1582 switch(hci_stack->substate) { 1583 case 0: 1584 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1585 // close all open connections 1586 connection = (hci_connection_t *) hci_stack->connections; 1587 1588 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1589 // don't close connections, if H4 supports power management 1590 if (bt_control_iphone_power_management_enabled()){ 1591 connection = NULL; 1592 } 1593 #endif 1594 if (connection){ 1595 1596 // send disconnect 1597 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1598 1599 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1600 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1601 1602 // send disconnected event right away - causes higher layer connections to get closed, too. 1603 hci_shutdown_connection(connection); 1604 return; 1605 } 1606 1607 if (hci_classic_supported()){ 1608 // disable page and inquiry scan 1609 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1610 1611 log_info("HCI_STATE_HALTING, disabling inq scans\n"); 1612 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 1613 1614 // continue in next sub state 1615 hci_stack->substate++; 1616 break; 1617 } 1618 // fall through for ble-only chips 1619 1620 case 2: 1621 log_info("HCI_STATE_HALTING, calling sleep\n"); 1622 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1623 // don't actually go to sleep, if H4 supports power management 1624 if (bt_control_iphone_power_management_enabled()){ 1625 // SLEEP MODE reached 1626 hci_stack->state = HCI_STATE_SLEEPING; 1627 hci_emit_state(); 1628 break; 1629 } 1630 #endif 1631 // switch mode 1632 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 1633 hci_emit_state(); 1634 break; 1635 1636 default: 1637 break; 1638 } 1639 break; 1640 1641 default: 1642 break; 1643 } 1644 } 1645 1646 int hci_send_cmd_packet(uint8_t *packet, int size){ 1647 bd_addr_t addr; 1648 hci_connection_t * conn; 1649 // house-keeping 1650 1651 // create_connection? 1652 if (IS_COMMAND(packet, hci_create_connection)){ 1653 bt_flip_addr(addr, &packet[3]); 1654 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1655 1656 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1657 if (!conn){ 1658 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1659 if (!conn){ 1660 // notify client that alloc failed 1661 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1662 return 0; // don't sent packet to controller 1663 } 1664 conn->state = SEND_CREATE_CONNECTION; 1665 } 1666 log_info("conn state %u", conn->state); 1667 switch (conn->state){ 1668 // if connection active exists 1669 case OPEN: 1670 // and OPEN, emit connection complete command, don't send to controller 1671 hci_emit_connection_complete(conn, 0); 1672 return 0; 1673 case SEND_CREATE_CONNECTION: 1674 // connection created by hci, e.g. dedicated bonding 1675 break; 1676 default: 1677 // otherwise, just ignore as it is already in the open process 1678 return 0; 1679 } 1680 conn->state = SENT_CREATE_CONNECTION; 1681 } 1682 1683 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1684 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1685 } 1686 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1687 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1688 } 1689 1690 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1691 if (hci_stack->remote_device_db){ 1692 bt_flip_addr(addr, &packet[3]); 1693 hci_stack->remote_device_db->delete_link_key(&addr); 1694 } 1695 } 1696 1697 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 1698 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 1699 bt_flip_addr(addr, &packet[3]); 1700 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1701 if (conn){ 1702 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 1703 } 1704 } 1705 1706 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 1707 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 1708 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 1709 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 1710 bt_flip_addr(addr, &packet[3]); 1711 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1712 if (conn){ 1713 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 1714 } 1715 } 1716 1717 #ifdef HAVE_BLE 1718 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 1719 hci_stack->adv_addr_type = packet[8]; 1720 } 1721 if (IS_COMMAND(packet, hci_le_set_random_address)){ 1722 bt_flip_addr(hci_stack->adv_address, &packet[3]); 1723 } 1724 #endif 1725 1726 hci_stack->num_cmd_packets--; 1727 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1728 1729 // free packet buffer for synchronous transport implementations 1730 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 1731 hci_stack->hci_packet_buffer_reserved = 0; 1732 } 1733 1734 return err; 1735 } 1736 1737 // disconnect because of security block 1738 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 1739 hci_connection_t * connection = hci_connection_for_handle(con_handle); 1740 if (!connection) return; 1741 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 1742 } 1743 1744 1745 // Configure Secure Simple Pairing 1746 1747 // enable will enable SSP during init 1748 void hci_ssp_set_enable(int enable){ 1749 hci_stack->ssp_enable = enable; 1750 } 1751 1752 int hci_local_ssp_activated(){ 1753 return hci_ssp_supported() && hci_stack->ssp_enable; 1754 } 1755 1756 // if set, BTstack will respond to io capability request using authentication requirement 1757 void hci_ssp_set_io_capability(int io_capability){ 1758 hci_stack->ssp_io_capability = io_capability; 1759 } 1760 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 1761 hci_stack->ssp_authentication_requirement = authentication_requirement; 1762 } 1763 1764 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 1765 void hci_ssp_set_auto_accept(int auto_accept){ 1766 hci_stack->ssp_auto_accept = auto_accept; 1767 } 1768 1769 /** 1770 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1771 */ 1772 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1773 va_list argptr; 1774 va_start(argptr, cmd); 1775 uint16_t size = hci_create_cmd_internal(hci_stack->hci_packet_buffer, cmd, argptr); 1776 va_end(argptr); 1777 return hci_send_cmd_packet(hci_stack->hci_packet_buffer, size); 1778 } 1779 1780 // Create various non-HCI events. 1781 // TODO: generalize, use table similar to hci_create_command 1782 1783 void hci_emit_state(){ 1784 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 1785 uint8_t event[3]; 1786 event[0] = BTSTACK_EVENT_STATE; 1787 event[1] = sizeof(event) - 2; 1788 event[2] = hci_stack->state; 1789 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1790 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1791 } 1792 1793 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1794 uint8_t event[13]; 1795 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1796 event[1] = sizeof(event) - 2; 1797 event[2] = status; 1798 bt_store_16(event, 3, conn->con_handle); 1799 bt_flip_addr(&event[5], conn->address); 1800 event[11] = 1; // ACL connection 1801 event[12] = 0; // encryption disabled 1802 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1803 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1804 } 1805 1806 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1807 uint8_t event[6]; 1808 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1809 event[1] = sizeof(event) - 2; 1810 event[2] = 0; // status = OK 1811 bt_store_16(event, 3, handle); 1812 event[5] = reason; 1813 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1814 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1815 } 1816 1817 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1818 if (disable_l2cap_timeouts) return; 1819 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 1820 uint8_t event[4]; 1821 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1822 event[1] = sizeof(event) - 2; 1823 bt_store_16(event, 2, conn->con_handle); 1824 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1825 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1826 } 1827 1828 void hci_emit_nr_connections_changed(){ 1829 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 1830 uint8_t event[3]; 1831 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1832 event[1] = sizeof(event) - 2; 1833 event[2] = nr_hci_connections(); 1834 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1835 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1836 } 1837 1838 void hci_emit_hci_open_failed(){ 1839 log_info("BTSTACK_EVENT_POWERON_FAILED"); 1840 uint8_t event[2]; 1841 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1842 event[1] = sizeof(event) - 2; 1843 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1844 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1845 } 1846 1847 #ifndef EMBEDDED 1848 void hci_emit_btstack_version() { 1849 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 1850 uint8_t event[6]; 1851 event[0] = BTSTACK_EVENT_VERSION; 1852 event[1] = sizeof(event) - 2; 1853 event[2] = BTSTACK_MAJOR; 1854 event[3] = BTSTACK_MINOR; 1855 bt_store_16(event, 4, BTSTACK_REVISION); 1856 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1857 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1858 } 1859 #endif 1860 1861 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1862 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 1863 uint8_t event[3]; 1864 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1865 event[1] = sizeof(event) - 2; 1866 event[2] = enabled; 1867 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1868 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1869 } 1870 1871 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1872 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 1873 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1874 event[1] = sizeof(event) - 2 - 1; 1875 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1876 bt_flip_addr(&event[3], *addr); 1877 memcpy(&event[9], name, 248); 1878 1879 event[9+248] = 0; // assert \0 for log_info 1880 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 1881 1882 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 1883 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 1884 } 1885 1886 void hci_emit_discoverable_enabled(uint8_t enabled){ 1887 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 1888 uint8_t event[3]; 1889 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1890 event[1] = sizeof(event) - 2; 1891 event[2] = enabled; 1892 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1893 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1894 } 1895 1896 void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 1897 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 1898 uint8_t event[5]; 1899 int pos = 0; 1900 event[pos++] = GAP_SECURITY_LEVEL; 1901 event[pos++] = sizeof(event) - 2; 1902 bt_store_16(event, 2, con_handle); 1903 pos += 2; 1904 event[pos++] = level; 1905 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1906 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1907 } 1908 1909 void hci_emit_dedicated_bonding_result(hci_connection_t * connection, uint8_t status){ 1910 log_info("hci_emit_dedicated_bonding_result %u ", status); 1911 uint8_t event[9]; 1912 int pos = 0; 1913 event[pos++] = GAP_DEDICATED_BONDING_COMPLETED; 1914 event[pos++] = sizeof(event) - 2; 1915 event[pos++] = status; 1916 bt_flip_addr( * (bd_addr_t *) &event[pos], connection->address); 1917 pos += 6; 1918 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1919 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1920 } 1921 1922 // query if remote side supports SSP 1923 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 1924 hci_connection_t * connection = hci_connection_for_handle(con_handle); 1925 if (!connection) return 0; 1926 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 1927 } 1928 1929 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 1930 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 1931 } 1932 1933 // GAP API 1934 /** 1935 * @bbrief enable/disable bonding. default is enabled 1936 * @praram enabled 1937 */ 1938 void gap_set_bondable_mode(int enable){ 1939 hci_stack->bondable = enable ? 1 : 0; 1940 } 1941 1942 /** 1943 * @brief map link keys to security levels 1944 */ 1945 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 1946 switch (link_key_type){ 1947 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 1948 return LEVEL_4; 1949 case COMBINATION_KEY: 1950 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 1951 return LEVEL_3; 1952 default: 1953 return LEVEL_2; 1954 } 1955 } 1956 1957 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 1958 if (!connection) return LEVEL_0; 1959 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 1960 return gap_security_level_for_link_key_type(connection->link_key_type); 1961 } 1962 1963 1964 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 1965 printf("gap_mitm_protection_required_for_security_level %u\n", level); 1966 return level > LEVEL_2; 1967 } 1968 1969 /** 1970 * @brief get current security level 1971 */ 1972 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 1973 hci_connection_t * connection = hci_connection_for_handle(con_handle); 1974 if (!connection) return LEVEL_0; 1975 return gap_security_level_for_connection(connection); 1976 } 1977 1978 /** 1979 * @brief request connection to device to 1980 * @result GAP_AUTHENTICATION_RESULT 1981 */ 1982 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 1983 hci_connection_t * connection = hci_connection_for_handle(con_handle); 1984 if (!connection){ 1985 hci_emit_security_level(con_handle, LEVEL_0); 1986 return; 1987 } 1988 gap_security_level_t current_level = gap_security_level(con_handle); 1989 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 1990 if (current_level >= requested_level){ 1991 hci_emit_security_level(con_handle, current_level); 1992 return; 1993 } 1994 1995 connection->requested_security_level = requested_level; 1996 1997 // would enabling ecnryption suffice (>= LEVEL_2)? 1998 if (hci_stack->remote_device_db){ 1999 link_key_type_t link_key_type; 2000 link_key_t link_key; 2001 if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 2002 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 2003 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2004 return; 2005 } 2006 } 2007 } 2008 2009 // try to authenticate connection 2010 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2011 hci_run(); 2012 } 2013 2014 /** 2015 * @brief start dedicated bonding with device. disconnect after bonding 2016 * @param device 2017 * @param request MITM protection 2018 * @result GAP_DEDICATED_BONDING_COMPLETE 2019 */ 2020 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 2021 2022 // create connection state machine 2023 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 2024 2025 if (!connection){ 2026 return BTSTACK_MEMORY_ALLOC_FAILED; 2027 } 2028 2029 // delete linkn key 2030 hci_drop_link_key_for_bd_addr( (bd_addr_t *) &device); 2031 2032 // configure LEVEL_2/3, dedicated bonding 2033 connection->state = SEND_CREATE_CONNECTION; 2034 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 2035 printf("gap_dedicated_bonding, mitm %u -> level %u\n", mitm_protection_required, connection->requested_security_level); 2036 connection->bonding_flags = BONDING_DEDICATED; 2037 2038 // wait for GAP Security Result and send GAP Dedicated Bonding complete 2039 2040 // handle: connnection failure (connection complete != ok) 2041 // handle: authentication failure 2042 // handle: disconnect on done 2043 2044 hci_run(); 2045 2046 return 0; 2047 } 2048 2049 void gap_set_local_name(const char * local_name){ 2050 hci_stack->local_name = local_name; 2051 } 2052 2053 2054