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 "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 74 // the STACK is here 75 static hci_stack_t hci_stack; 76 77 /** 78 * get connection for a given handle 79 * 80 * @return connection OR NULL, if not found 81 */ 82 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 83 linked_item_t *it; 84 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 85 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 86 return (hci_connection_t *) it; 87 } 88 } 89 return NULL; 90 } 91 92 static void hci_connection_timeout_handler(timer_source_t *timer){ 93 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 94 #ifdef HAVE_TIME 95 struct timeval tv; 96 gettimeofday(&tv, NULL); 97 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 98 // connections might be timed out 99 hci_emit_l2cap_check_timeout(connection); 100 } 101 #endif 102 #ifdef HAVE_TICK 103 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 104 // connections might be timed out 105 hci_emit_l2cap_check_timeout(connection); 106 } 107 #endif 108 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 109 run_loop_add_timer(timer); 110 } 111 112 static void hci_connection_timestamp(hci_connection_t *connection){ 113 #ifdef HAVE_TIME 114 gettimeofday(&connection->timestamp, NULL); 115 #endif 116 #ifdef HAVE_TICK 117 connection->timestamp = embedded_get_ticks(); 118 #endif 119 } 120 121 /** 122 * create connection for given address 123 * 124 * @return connection OR NULL, if no memory left 125 */ 126 static hci_connection_t * create_connection_for_addr(bd_addr_t addr){ 127 hci_connection_t * conn = (hci_connection_t *) btstack_memory_hci_connection_get(); 128 if (!conn) return NULL; 129 BD_ADDR_COPY(conn->address, addr); 130 conn->con_handle = 0xffff; 131 conn->authentication_flags = AUTH_FLAGS_NONE; 132 conn->bonding_flags = 0; 133 linked_item_set_user(&conn->timeout.item, conn); 134 conn->timeout.process = hci_connection_timeout_handler; 135 hci_connection_timestamp(conn); 136 conn->acl_recombination_length = 0; 137 conn->acl_recombination_pos = 0; 138 conn->num_acl_packets_sent = 0; 139 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 140 return conn; 141 } 142 143 /** 144 * get connection for given address 145 * 146 * @return connection OR NULL, if not found 147 */ 148 static hci_connection_t * connection_for_address(bd_addr_t address){ 149 linked_item_t *it; 150 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 151 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 152 return (hci_connection_t *) it; 153 } 154 } 155 return NULL; 156 } 157 158 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 159 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 160 } 161 162 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 163 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 164 } 165 166 167 /** 168 * add authentication flags and reset timer 169 */ 170 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 171 bd_addr_t addr; 172 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 173 hci_connection_t * conn = connection_for_address(addr); 174 if (conn) { 175 connectionSetAuthenticationFlags(conn, flags); 176 hci_connection_timestamp(conn); 177 } 178 } 179 180 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 181 hci_connection_t * conn = hci_connection_for_handle(handle); 182 if (!conn) return 0; 183 if (!conn->authentication_flags) return 0; 184 if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0; 185 if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0; 186 return 1; 187 } 188 189 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 190 if (hci_stack.remote_device_db) { 191 hci_stack.remote_device_db->delete_link_key(addr); 192 } 193 } 194 195 196 /** 197 * count connections 198 */ 199 static int nr_hci_connections(void){ 200 int count = 0; 201 linked_item_t *it; 202 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 203 return count; 204 } 205 206 /** 207 * Dummy handler called by HCI 208 */ 209 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 210 } 211 212 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 213 hci_connection_t * connection = hci_connection_for_handle(handle); 214 if (!connection) { 215 log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 216 return 0; 217 } 218 return connection->num_acl_packets_sent; 219 } 220 221 uint8_t hci_number_free_acl_slots(){ 222 uint8_t free_slots = hci_stack.total_num_acl_packets; 223 linked_item_t *it; 224 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 225 hci_connection_t * connection = (hci_connection_t *) it; 226 if (free_slots < connection->num_acl_packets_sent) { 227 log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 228 return 0; 229 } 230 free_slots -= connection->num_acl_packets_sent; 231 } 232 return free_slots; 233 } 234 235 int hci_can_send_packet_now(uint8_t packet_type){ 236 237 // check for async hci transport implementations 238 if (hci_stack.hci_transport->can_send_packet_now){ 239 if (!hci_stack.hci_transport->can_send_packet_now(packet_type)){ 240 return 0; 241 } 242 } 243 244 // check regular Bluetooth flow control 245 switch (packet_type) { 246 case HCI_ACL_DATA_PACKET: 247 return hci_number_free_acl_slots(); 248 case HCI_COMMAND_DATA_PACKET: 249 return hci_stack.num_cmd_packets; 250 default: 251 return 0; 252 } 253 } 254 255 int hci_send_acl_packet(uint8_t *packet, int size){ 256 257 // check for free places on BT module 258 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 259 260 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 261 hci_connection_t *connection = hci_connection_for_handle( con_handle); 262 if (!connection) return 0; 263 hci_connection_timestamp(connection); 264 265 // count packet 266 connection->num_acl_packets_sent++; 267 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 268 269 // send packet 270 int err = hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 271 272 return err; 273 } 274 275 static void acl_handler(uint8_t *packet, int size){ 276 277 // log_info("acl_handler: size %u", size); 278 279 // get info 280 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 281 hci_connection_t *conn = hci_connection_for_handle(con_handle); 282 uint8_t acl_flags = READ_ACL_FLAGS(packet); 283 uint16_t acl_length = READ_ACL_LENGTH(packet); 284 285 // ignore non-registered handle 286 if (!conn){ 287 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 288 return; 289 } 290 291 // assert packet is complete 292 if (acl_length + 4 != size){ 293 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 294 return; 295 } 296 297 // update idle timestamp 298 hci_connection_timestamp(conn); 299 300 // handle different packet types 301 switch (acl_flags & 0x03) { 302 303 case 0x01: // continuation fragment 304 305 // sanity check 306 if (conn->acl_recombination_pos == 0) { 307 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 308 return; 309 } 310 311 // append fragment payload (header already stored) 312 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 313 conn->acl_recombination_pos += acl_length; 314 315 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 316 // conn->acl_recombination_pos, conn->acl_recombination_length); 317 318 // forward complete L2CAP packet if complete. 319 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 320 321 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 322 // reset recombination buffer 323 conn->acl_recombination_length = 0; 324 conn->acl_recombination_pos = 0; 325 } 326 break; 327 328 case 0x02: { // first fragment 329 330 // sanity check 331 if (conn->acl_recombination_pos) { 332 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 333 return; 334 } 335 336 // peek into L2CAP packet! 337 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 338 339 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 340 341 // compare fragment size to L2CAP packet size 342 if (acl_length >= l2cap_length + 4){ 343 344 // forward fragment as L2CAP packet 345 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 346 347 } else { 348 // store first fragment and tweak acl length for complete package 349 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 350 conn->acl_recombination_pos = acl_length + 4; 351 conn->acl_recombination_length = l2cap_length; 352 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 353 } 354 break; 355 356 } 357 default: 358 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 359 return; 360 } 361 362 // execute main loop 363 hci_run(); 364 } 365 366 static void hci_shutdown_connection(hci_connection_t *conn){ 367 log_info("Connection closed: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 368 369 // cancel all l2cap connections 370 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 371 372 run_loop_remove_timer(&conn->timeout); 373 374 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 375 btstack_memory_hci_connection_free( conn ); 376 377 // now it's gone 378 hci_emit_nr_connections_changed(); 379 } 380 381 static const uint16_t packet_type_sizes[] = { 382 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 383 HCI_ACL_DH1_SIZE, 0, 0, 0, 384 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 385 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 386 }; 387 static const uint8_t packet_type_feature_requirement_bit[] = { 388 0, // 3 slot packets 389 1, // 5 slot packets 390 25, // EDR 2 mpbs 391 26, // EDR 3 mbps 392 39, // 3 slot EDR packts 393 40, // 5 slot EDR packet 394 }; 395 static const uint16_t packet_type_feature_packet_mask[] = { 396 0x0f00, // 3 slot packets 397 0xf000, // 5 slot packets 398 0x1102, // EDR 2 mpbs 399 0x2204, // EDR 3 mbps 400 0x0300, // 3 slot EDR packts 401 0x3000, // 5 slot EDR packet 402 }; 403 404 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 405 // enable packet types based on size 406 uint16_t packet_types = 0; 407 int i; 408 for (i=0;i<16;i++){ 409 if (packet_type_sizes[i] == 0) continue; 410 if (packet_type_sizes[i] <= buffer_size){ 411 packet_types |= 1 << i; 412 } 413 } 414 // disable packet types due to missing local supported features 415 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 416 int bit_idx = packet_type_feature_requirement_bit[i]; 417 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 418 if (feature_set) continue; 419 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 420 packet_types &= ~packet_type_feature_packet_mask[i]; 421 } 422 // flip bits for "may not be used" 423 packet_types ^= 0x3306; 424 return packet_types; 425 } 426 427 uint16_t hci_usable_acl_packet_types(void){ 428 return hci_stack.packet_types; 429 } 430 431 uint8_t* hci_get_outgoing_acl_packet_buffer(void){ 432 // hci packet buffer is >= acl data packet length 433 return hci_stack.hci_packet_buffer; 434 } 435 436 uint16_t hci_max_acl_data_packet_length(void){ 437 return hci_stack.acl_data_packet_length; 438 } 439 440 int hci_ssp_supported(void){ 441 // No 51, byte 6, bit 3 442 return (hci_stack.local_supported_features[6] & (1 << 3)) != 0; 443 } 444 445 int hci_classic_supported(void){ 446 // No 37, byte 4, bit 5, = No BR/EDR Support 447 return (hci_stack.local_supported_features[4] & (1 << 5)) == 0; 448 } 449 450 int hci_le_supported(void){ 451 // No 37, byte 4, bit 6 = LE Supported (Controller) 452 #ifdef HAVE_BLE 453 return (hci_stack.local_supported_features[4] & (1 << 6)) != 0; 454 #else 455 return 0; 456 #endif 457 } 458 459 // get addr type and address used in advertisement packets 460 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t * addr){ 461 *addr_type = hci_stack.adv_addr_type; 462 if (hci_stack.adv_addr_type){ 463 memcpy(addr, hci_stack.adv_address, 6); 464 } else { 465 memcpy(addr, hci_stack.local_bd_addr, 6); 466 } 467 } 468 469 // avoid huge local variables 470 #ifndef EMBEDDED 471 static device_name_t device_name; 472 #endif 473 static void event_handler(uint8_t *packet, int size){ 474 475 uint16_t event_length = packet[1]; 476 477 // assert packet is complete 478 if (size != event_length + 2){ 479 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 480 return; 481 } 482 483 bd_addr_t addr; 484 uint8_t link_type; 485 hci_con_handle_t handle; 486 hci_connection_t * conn; 487 int i; 488 489 // printf("HCI:EVENT:%02x\n", packet[0]); 490 491 switch (packet[0]) { 492 493 case HCI_EVENT_COMMAND_COMPLETE: 494 // get num cmd packets 495 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]); 496 hci_stack.num_cmd_packets = packet[2]; 497 498 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 499 // from offset 5 500 // status 501 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 502 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 503 // ignore: SCO data packet len (8) 504 hci_stack.total_num_acl_packets = packet[9]; 505 // ignore: total num SCO packets 506 if (hci_stack.state == HCI_STATE_INITIALIZING){ 507 // determine usable ACL payload size 508 if (HCI_ACL_PAYLOAD_SIZE < hci_stack.acl_data_packet_length){ 509 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 510 } 511 log_info("hci_read_buffer_size: used size %u, count %u\n", 512 hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 513 } 514 } 515 #ifdef HAVE_BLE 516 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 517 hci_stack.le_data_packet_length = READ_BT_16(packet, 6); 518 hci_stack.total_num_le_packets = packet[8]; 519 log_info("hci_le_read_buffer_size: size %u, count %u\n", hci_stack.le_data_packet_length, hci_stack.total_num_le_packets); 520 } 521 #endif 522 // Dump local address 523 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 524 bt_flip_addr(hci_stack.local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 525 log_info("Local Address, Status: 0x%02x: Addr: %s\n", 526 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack.local_bd_addr)); 527 } 528 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 529 hci_emit_discoverable_enabled(hci_stack.discoverable); 530 } 531 // Note: HCI init checks 532 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 533 memcpy(hci_stack.local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 534 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 535 hci_stack.local_supported_features[0], hci_stack.local_supported_features[1], 536 hci_stack.local_supported_features[2], hci_stack.local_supported_features[3], 537 hci_stack.local_supported_features[4], hci_stack.local_supported_features[5], 538 hci_stack.local_supported_features[6], hci_stack.local_supported_features[7]); 539 540 // determine usable ACL packet types based buffer size and supported features 541 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]); 542 log_info("packet types %04x", hci_stack.packet_types); 543 544 // Classic/LE 545 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 546 } 547 break; 548 549 case HCI_EVENT_COMMAND_STATUS: 550 // get num cmd packets 551 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]); 552 hci_stack.num_cmd_packets = packet[3]; 553 break; 554 555 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 556 for (i=0; i<packet[2];i++){ 557 handle = READ_BT_16(packet, 3 + 2*i); 558 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 559 conn = hci_connection_for_handle(handle); 560 if (!conn){ 561 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 562 continue; 563 } 564 conn->num_acl_packets_sent -= num_packets; 565 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 566 } 567 break; 568 569 case HCI_EVENT_CONNECTION_REQUEST: 570 bt_flip_addr(addr, &packet[2]); 571 // TODO: eval COD 8-10 572 link_type = packet[11]; 573 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 574 if (link_type == 1) { // ACL 575 conn = connection_for_address(addr); 576 if (!conn) { 577 conn = create_connection_for_addr(addr); 578 } 579 if (!conn) { 580 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 581 hci_stack.decline_reason = 0x0d; 582 BD_ADDR_COPY(hci_stack.decline_addr, addr); 583 break; 584 } 585 conn->state = RECEIVED_CONNECTION_REQUEST; 586 hci_run(); 587 } else { 588 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 589 hci_stack.decline_reason = 0x0a; 590 BD_ADDR_COPY(hci_stack.decline_addr, addr); 591 } 592 break; 593 594 case HCI_EVENT_CONNECTION_COMPLETE: 595 // Connection management 596 bt_flip_addr(addr, &packet[5]); 597 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 598 conn = connection_for_address(addr); 599 if (conn) { 600 if (!packet[2]){ 601 conn->state = OPEN; 602 conn->con_handle = READ_BT_16(packet, 3); 603 conn->bonding_flags = BONDING_REQUEST_REMOTE_FEATURES; 604 605 // restart timer 606 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 607 run_loop_add_timer(&conn->timeout); 608 609 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 610 611 hci_emit_nr_connections_changed(); 612 } else { 613 // connection failed, remove entry 614 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 615 btstack_memory_hci_connection_free( conn ); 616 617 // if authentication error, also delete link key 618 if (packet[2] == 0x05) { 619 hci_drop_link_key_for_bd_addr(&addr); 620 } 621 } 622 } 623 break; 624 625 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 626 handle = READ_BT_16(packet, 3); 627 conn = hci_connection_for_handle(handle); 628 if (!conn) break; 629 if (!packet[2]){ 630 uint8_t * features = &packet[5]; 631 if (features[6] & (1 << 3)){ 632 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 633 } 634 } 635 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 636 break; 637 638 case HCI_EVENT_LINK_KEY_REQUEST: 639 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 640 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 641 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 642 if (hci_stack.bondable && !hci_stack.remote_device_db) break; 643 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 644 hci_run(); 645 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 646 return; 647 648 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 649 bt_flip_addr(addr, &packet[2]); 650 conn = connection_for_address(addr); 651 if (!conn) break; 652 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 653 link_key_type_t link_key_type = packet[24]; 654 // Change Connection Encryption keeps link key type 655 if (link_key_type != CHANGED_COMBINATION_KEY){ 656 conn->link_key_type = link_key_type; 657 } 658 if (!hci_stack.remote_device_db) break; 659 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8], conn->link_key_type); 660 // still forward event to allow dismiss of pairing dialog 661 break; 662 } 663 664 case HCI_EVENT_PIN_CODE_REQUEST: 665 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 666 // non-bondable mode: pin code negative reply will be sent 667 if (!hci_stack.bondable){ 668 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_PIN_CODE_REQUEST); 669 hci_run(); 670 return; 671 } 672 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 673 if (!hci_stack.remote_device_db) break; 674 bt_flip_addr(addr, &packet[2]); 675 hci_stack.remote_device_db->delete_link_key(&addr); 676 break; 677 678 case HCI_EVENT_IO_CAPABILITY_REQUEST: 679 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 680 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 681 break; 682 683 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 684 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_CONFIRM_REQUEST); 685 if (!hci_stack.ssp_auto_accept) break; 686 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 687 break; 688 689 case HCI_EVENT_USER_PASSKEY_REQUEST: 690 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_PASSKEY_REQUEST); 691 if (!hci_stack.ssp_auto_accept) break; 692 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 693 break; 694 695 case HCI_EVENT_ENCRYPTION_CHANGE: 696 if (packet[2]) break; // error status 697 handle = READ_BT_16(packet, 3); 698 conn = hci_connection_for_handle(handle); 699 if (!conn) break; 700 if (packet[5]){ 701 conn->authentication_flags |= CONNECTION_ENCRYPTED; 702 } else { 703 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 704 } 705 break; 706 707 #ifndef EMBEDDED 708 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 709 if (!hci_stack.remote_device_db) break; 710 if (packet[2]) break; // status not ok 711 bt_flip_addr(addr, &packet[3]); 712 // fix for invalid remote names - terminate on 0xff 713 for (i=0; i<248;i++){ 714 if (packet[9+i] == 0xff){ 715 packet[9+i] = 0; 716 break; 717 } 718 } 719 memset(&device_name, 0, sizeof(device_name_t)); 720 strncpy((char*) device_name, (char*) &packet[9], 248); 721 hci_stack.remote_device_db->put_name(&addr, &device_name); 722 break; 723 724 case HCI_EVENT_INQUIRY_RESULT: 725 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 726 if (!hci_stack.remote_device_db) break; 727 // first send inq result packet 728 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 729 // then send cached remote names 730 for (i=0; i<packet[2];i++){ 731 bt_flip_addr(addr, &packet[3+i*6]); 732 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 733 hci_emit_remote_name_cached(&addr, &device_name); 734 } 735 } 736 return; 737 #endif 738 739 case HCI_EVENT_DISCONNECTION_COMPLETE: 740 if (!packet[2]){ 741 handle = READ_BT_16(packet, 3); 742 hci_connection_t * conn = hci_connection_for_handle(handle); 743 if (conn) { 744 hci_shutdown_connection(conn); 745 } 746 } 747 break; 748 749 case HCI_EVENT_HARDWARE_ERROR: 750 if(hci_stack.control && hci_stack.control->hw_error){ 751 (*hci_stack.control->hw_error)(); 752 } 753 break; 754 755 #ifdef HAVE_BLE 756 case HCI_EVENT_LE_META: 757 switch (packet[2]) { 758 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 759 // Connection management 760 bt_flip_addr(addr, &packet[8]); 761 log_info("LE Connection_complete (status=%u) %s\n", packet[3], bd_addr_to_str(addr)); 762 // LE connections are auto-accepted, so just create a connection if there isn't one already 763 conn = connection_for_address(addr); 764 if (packet[3]){ 765 if (conn){ 766 // outgoing connection failed, remove entry 767 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 768 btstack_memory_hci_connection_free( conn ); 769 770 } 771 // if authentication error, also delete link key 772 if (packet[3] == 0x05) { 773 hci_drop_link_key_for_bd_addr(&addr); 774 } 775 break; 776 } 777 if (!conn){ 778 conn = create_connection_for_addr(addr); 779 } 780 if (!conn){ 781 // no memory 782 break; 783 } 784 785 conn->state = OPEN; 786 conn->con_handle = READ_BT_16(packet, 4); 787 788 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 789 790 // restart timer 791 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 792 // run_loop_add_timer(&conn->timeout); 793 794 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 795 796 hci_emit_nr_connections_changed(); 797 break; 798 799 // printf("LE buffer size: %u, count %u\n", READ_BT_16(packet,6), packet[8]); 800 801 default: 802 break; 803 } 804 break; 805 #endif 806 807 default: 808 break; 809 } 810 811 // handle BT initialization 812 if (hci_stack.state == HCI_STATE_INITIALIZING){ 813 if (hci_stack.substate % 2){ 814 // odd: waiting for event 815 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 816 // wait for explicit COMMAND COMPLETE on RESET 817 if (hci_stack.substate > 1 || COMMAND_COMPLETE_EVENT(packet, hci_reset)) { 818 hci_stack.substate++; 819 } 820 } 821 } 822 } 823 824 // help with BT sleep 825 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 826 && hci_stack.substate == 1 827 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 828 hci_stack.substate++; 829 } 830 831 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 832 833 // execute main loop 834 hci_run(); 835 } 836 837 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 838 switch (packet_type) { 839 case HCI_EVENT_PACKET: 840 event_handler(packet, size); 841 break; 842 case HCI_ACL_DATA_PACKET: 843 acl_handler(packet, size); 844 break; 845 default: 846 break; 847 } 848 } 849 850 /** Register HCI packet handlers */ 851 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 852 hci_stack.packet_handler = handler; 853 } 854 855 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 856 857 // reference to use transport layer implementation 858 hci_stack.hci_transport = transport; 859 860 // references to used control implementation 861 hci_stack.control = control; 862 863 // reference to used config 864 hci_stack.config = config; 865 866 // no connections yet 867 hci_stack.connections = NULL; 868 hci_stack.discoverable = 0; 869 hci_stack.connectable = 0; 870 hci_stack.bondable = 1; 871 872 // no pending cmds 873 hci_stack.decline_reason = 0; 874 hci_stack.new_scan_enable_value = 0xff; 875 876 // higher level handler 877 hci_stack.packet_handler = dummy_handler; 878 879 // store and open remote device db 880 hci_stack.remote_device_db = remote_device_db; 881 if (hci_stack.remote_device_db) { 882 hci_stack.remote_device_db->open(); 883 } 884 885 // max acl payload size defined in config.h 886 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 887 888 // register packet handlers with transport 889 transport->register_packet_handler(&packet_handler); 890 891 hci_stack.state = HCI_STATE_OFF; 892 893 // class of device 894 hci_stack.class_of_device = 0x007a020c; // Smartphone 895 896 // Secure Simple Pairing default: enable, no I/O capabilities, auto accept 897 hci_stack.ssp_enable = 1; 898 hci_stack.ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 899 hci_stack.ssp_authentication_requirement = 0; 900 hci_stack.ssp_auto_accept = 1; 901 902 // LE 903 hci_stack.adv_addr_type = 0; 904 memset(hci_stack.adv_address, 0, 6); 905 } 906 907 void hci_close(){ 908 // close remote device db 909 if (hci_stack.remote_device_db) { 910 hci_stack.remote_device_db->close(); 911 } 912 while (hci_stack.connections) { 913 hci_shutdown_connection((hci_connection_t *) hci_stack.connections); 914 } 915 hci_power_control(HCI_POWER_OFF); 916 } 917 918 // State-Module-Driver overview 919 // state module low-level 920 // HCI_STATE_OFF off close 921 // HCI_STATE_INITIALIZING, on open 922 // HCI_STATE_WORKING, on open 923 // HCI_STATE_HALTING, on open 924 // HCI_STATE_SLEEPING, off/sleep close 925 // HCI_STATE_FALLING_ASLEEP on open 926 927 static int hci_power_control_on(void){ 928 929 // power on 930 int err = 0; 931 if (hci_stack.control && hci_stack.control->on){ 932 err = (*hci_stack.control->on)(hci_stack.config); 933 } 934 if (err){ 935 log_error( "POWER_ON failed\n"); 936 hci_emit_hci_open_failed(); 937 return err; 938 } 939 940 // open low-level device 941 err = hci_stack.hci_transport->open(hci_stack.config); 942 if (err){ 943 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 944 if (hci_stack.control && hci_stack.control->off){ 945 (*hci_stack.control->off)(hci_stack.config); 946 } 947 hci_emit_hci_open_failed(); 948 return err; 949 } 950 return 0; 951 } 952 953 static void hci_power_control_off(void){ 954 955 log_info("hci_power_control_off\n"); 956 957 // close low-level device 958 hci_stack.hci_transport->close(hci_stack.config); 959 960 log_info("hci_power_control_off - hci_transport closed\n"); 961 962 // power off 963 if (hci_stack.control && hci_stack.control->off){ 964 (*hci_stack.control->off)(hci_stack.config); 965 } 966 967 log_info("hci_power_control_off - control closed\n"); 968 969 hci_stack.state = HCI_STATE_OFF; 970 } 971 972 static void hci_power_control_sleep(void){ 973 974 log_info("hci_power_control_sleep\n"); 975 976 #if 0 977 // don't close serial port during sleep 978 979 // close low-level device 980 hci_stack.hci_transport->close(hci_stack.config); 981 #endif 982 983 // sleep mode 984 if (hci_stack.control && hci_stack.control->sleep){ 985 (*hci_stack.control->sleep)(hci_stack.config); 986 } 987 988 hci_stack.state = HCI_STATE_SLEEPING; 989 } 990 991 static int hci_power_control_wake(void){ 992 993 log_info("hci_power_control_wake\n"); 994 995 // wake on 996 if (hci_stack.control && hci_stack.control->wake){ 997 (*hci_stack.control->wake)(hci_stack.config); 998 } 999 1000 #if 0 1001 // open low-level device 1002 int err = hci_stack.hci_transport->open(hci_stack.config); 1003 if (err){ 1004 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1005 if (hci_stack.control && hci_stack.control->off){ 1006 (*hci_stack.control->off)(hci_stack.config); 1007 } 1008 hci_emit_hci_open_failed(); 1009 return err; 1010 } 1011 #endif 1012 1013 return 0; 1014 } 1015 1016 1017 int hci_power_control(HCI_POWER_MODE power_mode){ 1018 1019 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 1020 1021 int err = 0; 1022 switch (hci_stack.state){ 1023 1024 case HCI_STATE_OFF: 1025 switch (power_mode){ 1026 case HCI_POWER_ON: 1027 err = hci_power_control_on(); 1028 if (err) return err; 1029 // set up state machine 1030 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1031 hci_stack.state = HCI_STATE_INITIALIZING; 1032 hci_stack.substate = 0; 1033 break; 1034 case HCI_POWER_OFF: 1035 // do nothing 1036 break; 1037 case HCI_POWER_SLEEP: 1038 // do nothing (with SLEEP == OFF) 1039 break; 1040 } 1041 break; 1042 1043 case HCI_STATE_INITIALIZING: 1044 switch (power_mode){ 1045 case HCI_POWER_ON: 1046 // do nothing 1047 break; 1048 case HCI_POWER_OFF: 1049 // no connections yet, just turn it off 1050 hci_power_control_off(); 1051 break; 1052 case HCI_POWER_SLEEP: 1053 // no connections yet, just turn it off 1054 hci_power_control_sleep(); 1055 break; 1056 } 1057 break; 1058 1059 case HCI_STATE_WORKING: 1060 switch (power_mode){ 1061 case HCI_POWER_ON: 1062 // do nothing 1063 break; 1064 case HCI_POWER_OFF: 1065 // see hci_run 1066 hci_stack.state = HCI_STATE_HALTING; 1067 break; 1068 case HCI_POWER_SLEEP: 1069 // see hci_run 1070 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 1071 hci_stack.substate = 0; 1072 break; 1073 } 1074 break; 1075 1076 case HCI_STATE_HALTING: 1077 switch (power_mode){ 1078 case HCI_POWER_ON: 1079 // set up state machine 1080 hci_stack.state = HCI_STATE_INITIALIZING; 1081 hci_stack.substate = 0; 1082 break; 1083 case HCI_POWER_OFF: 1084 // do nothing 1085 break; 1086 case HCI_POWER_SLEEP: 1087 // see hci_run 1088 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 1089 hci_stack.substate = 0; 1090 break; 1091 } 1092 break; 1093 1094 case HCI_STATE_FALLING_ASLEEP: 1095 switch (power_mode){ 1096 case HCI_POWER_ON: 1097 1098 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1099 // nothing to do, if H4 supports power management 1100 if (bt_control_iphone_power_management_enabled()){ 1101 hci_stack.state = HCI_STATE_INITIALIZING; 1102 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1103 break; 1104 } 1105 #endif 1106 // set up state machine 1107 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1108 hci_stack.state = HCI_STATE_INITIALIZING; 1109 hci_stack.substate = 0; 1110 break; 1111 case HCI_POWER_OFF: 1112 // see hci_run 1113 hci_stack.state = HCI_STATE_HALTING; 1114 break; 1115 case HCI_POWER_SLEEP: 1116 // do nothing 1117 break; 1118 } 1119 break; 1120 1121 case HCI_STATE_SLEEPING: 1122 switch (power_mode){ 1123 case HCI_POWER_ON: 1124 1125 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1126 // nothing to do, if H4 supports power management 1127 if (bt_control_iphone_power_management_enabled()){ 1128 hci_stack.state = HCI_STATE_INITIALIZING; 1129 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1130 hci_update_scan_enable(); 1131 break; 1132 } 1133 #endif 1134 err = hci_power_control_wake(); 1135 if (err) return err; 1136 // set up state machine 1137 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1138 hci_stack.state = HCI_STATE_INITIALIZING; 1139 hci_stack.substate = 0; 1140 break; 1141 case HCI_POWER_OFF: 1142 hci_stack.state = HCI_STATE_HALTING; 1143 break; 1144 case HCI_POWER_SLEEP: 1145 // do nothing 1146 break; 1147 } 1148 break; 1149 } 1150 1151 // create internal event 1152 hci_emit_state(); 1153 1154 // trigger next/first action 1155 hci_run(); 1156 1157 return 0; 1158 } 1159 1160 static void hci_update_scan_enable(void){ 1161 // 2 = page scan, 1 = inq scan 1162 hci_stack.new_scan_enable_value = hci_stack.connectable << 1 | hci_stack.discoverable; 1163 hci_run(); 1164 } 1165 1166 void hci_discoverable_control(uint8_t enable){ 1167 if (enable) enable = 1; // normalize argument 1168 1169 if (hci_stack.discoverable == enable){ 1170 hci_emit_discoverable_enabled(hci_stack.discoverable); 1171 return; 1172 } 1173 1174 hci_stack.discoverable = enable; 1175 hci_update_scan_enable(); 1176 } 1177 1178 void hci_connectable_control(uint8_t enable){ 1179 if (enable) enable = 1; // normalize argument 1180 1181 // don't emit event 1182 if (hci_stack.connectable == enable) return; 1183 1184 hci_stack.connectable = enable; 1185 hci_update_scan_enable(); 1186 } 1187 1188 bd_addr_t * hci_local_bd_addr(void){ 1189 return &hci_stack.local_bd_addr; 1190 } 1191 1192 void hci_run(){ 1193 1194 hci_connection_t * connection; 1195 linked_item_t * it; 1196 1197 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1198 1199 // global/non-connection oriented commands 1200 1201 // decline incoming connections 1202 if (hci_stack.decline_reason){ 1203 uint8_t reason = hci_stack.decline_reason; 1204 hci_stack.decline_reason = 0; 1205 hci_send_cmd(&hci_reject_connection_request, hci_stack.decline_addr, reason); 1206 return; 1207 } 1208 1209 // send scan enable 1210 if (hci_stack.state == HCI_STATE_WORKING && hci_stack.new_scan_enable_value != 0xff && hci_classic_supported()){ 1211 hci_send_cmd(&hci_write_scan_enable, hci_stack.new_scan_enable_value); 1212 hci_stack.new_scan_enable_value = 0xff; 1213 return; 1214 } 1215 1216 // send pending HCI commands 1217 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 1218 1219 connection = (hci_connection_t *) it; 1220 1221 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 1222 log_info("sending hci_accept_connection_request\n"); 1223 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1224 connection->state = ACCEPTED_CONNECTION_REQUEST; 1225 return; 1226 } 1227 1228 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1229 link_key_t link_key; 1230 link_key_type_t link_key_type; 1231 log_info("responding to link key request\n"); 1232 if ( hci_stack.bondable && hci_stack.remote_device_db && hci_stack.remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 1233 connection->link_key_type = link_key_type; 1234 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1235 } else { 1236 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1237 } 1238 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1239 return; 1240 } 1241 1242 if (connection->authentication_flags & HANDLE_PIN_CODE_REQUEST){ 1243 log_info("denying to pin request\n"); 1244 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 1245 connectionClearAuthenticationFlags(connection, HANDLE_PIN_CODE_REQUEST); 1246 return; 1247 } 1248 1249 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1250 if (hci_stack.bondable && hci_stack.ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 1251 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack.ssp_io_capability, NULL, hci_stack.ssp_authentication_requirement); 1252 } else { 1253 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 1254 } 1255 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1256 return; 1257 } 1258 1259 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1260 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1261 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1262 return; 1263 } 1264 1265 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1266 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1267 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1268 return; 1269 } 1270 1271 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 1272 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 1273 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 1274 } 1275 } 1276 1277 switch (hci_stack.state){ 1278 case HCI_STATE_INITIALIZING: 1279 // log_info("hci_init: substate %u\n", hci_stack.substate); 1280 if (hci_stack.substate % 2) { 1281 // odd: waiting for command completion 1282 return; 1283 } 1284 switch (hci_stack.substate >> 1){ 1285 case 0: // RESET 1286 hci_send_cmd(&hci_reset); 1287 1288 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 1289 // skip baud change 1290 hci_stack.substate = 4; // >> 1 = 2 1291 } 1292 break; 1293 case 1: // SEND BAUD CHANGE 1294 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_packet_buffer); 1295 hci_send_cmd_packet(hci_stack.hci_packet_buffer, 3 + hci_stack.hci_packet_buffer[2]); 1296 break; 1297 case 2: // LOCAL BAUD CHANGE 1298 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 1299 hci_stack.substate += 2; 1300 // break missing here for fall through 1301 1302 case 3: 1303 // Custom initialization 1304 if (hci_stack.control && hci_stack.control->next_cmd){ 1305 int valid_cmd = (*hci_stack.control->next_cmd)(hci_stack.config, hci_stack.hci_packet_buffer); 1306 if (valid_cmd){ 1307 int size = 3 + hci_stack.hci_packet_buffer[2]; 1308 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack.hci_packet_buffer, size); 1309 hci_stack.substate = 4; // more init commands 1310 break; 1311 } 1312 log_info("hci_run: init script done\n\r"); 1313 } 1314 // otherwise continue 1315 hci_send_cmd(&hci_read_bd_addr); 1316 break; 1317 case 4: 1318 hci_send_cmd(&hci_read_buffer_size); 1319 break; 1320 case 5: 1321 hci_send_cmd(&hci_read_local_supported_features); 1322 break; 1323 case 6: 1324 if (hci_le_supported()){ 1325 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1326 } else { 1327 // Kensington Bluetoot 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1328 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1329 } 1330 1331 // skip Classic init commands for LE only chipsets 1332 if (!hci_classic_supported()){ 1333 if (hci_le_supported()){ 1334 hci_stack.substate = 11 << 1; // skip all classic command 1335 } else { 1336 log_error("Neither BR/EDR nor LE supported"); 1337 hci_stack.substate = 13 << 1; // skip all 1338 } 1339 } 1340 break; 1341 case 7: 1342 if (hci_ssp_supported()){ 1343 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack.ssp_enable); 1344 break; 1345 } 1346 hci_stack.substate += 2; 1347 // break missing here for fall through 1348 1349 case 8: 1350 // ca. 15 sec 1351 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1352 break; 1353 case 9: 1354 hci_send_cmd(&hci_write_class_of_device, hci_stack.class_of_device); 1355 break; 1356 case 10: 1357 if (hci_stack.local_name){ 1358 hci_send_cmd(&hci_write_local_name, hci_stack.local_name); 1359 } else { 1360 char hostname[30]; 1361 #ifdef EMBEDDED 1362 // BTstack-11:22:33:44:55:66 1363 strcpy(hostname, "BTstack "); 1364 strcat(hostname, bd_addr_to_str(hci_stack.local_bd_addr)); 1365 printf("---> Name %s\n", hostname); 1366 #else 1367 // hostname for POSIX systems 1368 gethostname(hostname, 30); 1369 hostname[29] = '\0'; 1370 #endif 1371 hci_send_cmd(&hci_write_local_name, hostname); 1372 } 1373 break; 1374 case 11: 1375 hci_send_cmd(&hci_write_scan_enable, (hci_stack.connectable << 1) | hci_stack.discoverable); // page scan 1376 if (!hci_le_supported()){ 1377 // SKIP LE init for Classic only configuration 1378 hci_stack.substate = 13 << 1; 1379 } 1380 break; 1381 1382 #ifdef HAVE_BLE 1383 // LE INIT 1384 case 12: 1385 hci_send_cmd(&hci_le_read_buffer_size); 1386 break; 1387 case 13: 1388 // LE Supported Host = 1, Simultaneous Host = 0 1389 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1390 break; 1391 #endif 1392 1393 // DONE 1394 case 14: 1395 // done. 1396 hci_stack.state = HCI_STATE_WORKING; 1397 hci_emit_state(); 1398 break; 1399 default: 1400 break; 1401 } 1402 hci_stack.substate++; 1403 break; 1404 1405 case HCI_STATE_HALTING: 1406 1407 log_info("HCI_STATE_HALTING\n"); 1408 // close all open connections 1409 connection = (hci_connection_t *) hci_stack.connections; 1410 if (connection){ 1411 1412 // send disconnect 1413 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1414 1415 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1416 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1417 1418 // send disconnected event right away - causes higher layer connections to get closed, too. 1419 hci_shutdown_connection(connection); 1420 return; 1421 } 1422 log_info("HCI_STATE_HALTING, calling off\n"); 1423 1424 // switch mode 1425 hci_power_control_off(); 1426 1427 log_info("HCI_STATE_HALTING, emitting state\n"); 1428 hci_emit_state(); 1429 log_info("HCI_STATE_HALTING, done\n"); 1430 break; 1431 1432 case HCI_STATE_FALLING_ASLEEP: 1433 switch(hci_stack.substate) { 1434 case 0: 1435 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1436 // close all open connections 1437 connection = (hci_connection_t *) hci_stack.connections; 1438 1439 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1440 // don't close connections, if H4 supports power management 1441 if (bt_control_iphone_power_management_enabled()){ 1442 connection = NULL; 1443 } 1444 #endif 1445 if (connection){ 1446 1447 // send disconnect 1448 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1449 1450 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1451 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1452 1453 // send disconnected event right away - causes higher layer connections to get closed, too. 1454 hci_shutdown_connection(connection); 1455 return; 1456 } 1457 1458 if (hci_classic_supported()){ 1459 // disable page and inquiry scan 1460 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1461 1462 log_info("HCI_STATE_HALTING, disabling inq scans\n"); 1463 hci_send_cmd(&hci_write_scan_enable, hci_stack.connectable << 1); // drop inquiry scan but keep page scan 1464 1465 // continue in next sub state 1466 hci_stack.substate++; 1467 break; 1468 } 1469 // fall through for ble-only chips 1470 1471 case 2: 1472 log_info("HCI_STATE_HALTING, calling sleep\n"); 1473 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1474 // don't actually go to sleep, if H4 supports power management 1475 if (bt_control_iphone_power_management_enabled()){ 1476 // SLEEP MODE reached 1477 hci_stack.state = HCI_STATE_SLEEPING; 1478 hci_emit_state(); 1479 break; 1480 } 1481 #endif 1482 // switch mode 1483 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1484 hci_emit_state(); 1485 break; 1486 1487 default: 1488 break; 1489 } 1490 break; 1491 1492 default: 1493 break; 1494 } 1495 } 1496 1497 int hci_send_cmd_packet(uint8_t *packet, int size){ 1498 bd_addr_t addr; 1499 hci_connection_t * conn; 1500 // house-keeping 1501 1502 // create_connection? 1503 if (IS_COMMAND(packet, hci_create_connection)){ 1504 bt_flip_addr(addr, &packet[3]); 1505 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1506 conn = connection_for_address(addr); 1507 if (conn) { 1508 // if connection exists 1509 if (conn->state == OPEN) { 1510 // and OPEN, emit connection complete command 1511 hci_emit_connection_complete(conn, 0); 1512 } 1513 // otherwise, just ignore as it is already in the open process 1514 return 0; // don't sent packet to controller 1515 1516 } 1517 // create connection struct and register, state = SENT_CREATE_CONNECTION 1518 conn = create_connection_for_addr(addr); 1519 if (!conn){ 1520 // notify client that alloc failed 1521 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1522 return 0; // don't sent packet to controller 1523 } 1524 conn->state = SENT_CREATE_CONNECTION; 1525 } 1526 1527 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1528 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1529 } 1530 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1531 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1532 } 1533 1534 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1535 if (hci_stack.remote_device_db){ 1536 bt_flip_addr(addr, &packet[3]); 1537 hci_stack.remote_device_db->delete_link_key(&addr); 1538 } 1539 } 1540 1541 #ifdef HAVE_BLE 1542 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 1543 hci_stack.adv_addr_type = packet[8]; 1544 } 1545 if (IS_COMMAND(packet, hci_le_set_random_address)){ 1546 bt_flip_addr(hci_stack.adv_address, &packet[3]); 1547 } 1548 #endif 1549 1550 1551 hci_stack.num_cmd_packets--; 1552 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1553 } 1554 1555 // Configure Secure Simple Pairing 1556 1557 // enable will enable SSP during init 1558 void hci_ssp_set_enable(int enable){ 1559 hci_stack.ssp_enable = enable; 1560 } 1561 1562 // if set, BTstack will respond to io capability request using authentication requirement 1563 void hci_ssp_set_io_capability(int io_capability){ 1564 hci_stack.ssp_io_capability = io_capability; 1565 } 1566 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 1567 hci_stack.ssp_authentication_requirement = authentication_requirement; 1568 } 1569 1570 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 1571 void hci_ssp_set_auto_accept(int auto_accept){ 1572 hci_stack.ssp_auto_accept = auto_accept; 1573 } 1574 1575 /** 1576 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1577 */ 1578 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1579 va_list argptr; 1580 va_start(argptr, cmd); 1581 uint16_t size = hci_create_cmd_internal(hci_stack.hci_packet_buffer, cmd, argptr); 1582 va_end(argptr); 1583 return hci_send_cmd_packet(hci_stack.hci_packet_buffer, size); 1584 } 1585 1586 // Create various non-HCI events. 1587 // TODO: generalize, use table similar to hci_create_command 1588 1589 void hci_emit_state(){ 1590 log_info("BTSTACK_EVENT_STATE %u", hci_stack.state); 1591 uint8_t event[3]; 1592 event[0] = BTSTACK_EVENT_STATE; 1593 event[1] = sizeof(event) - 2; 1594 event[2] = hci_stack.state; 1595 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1596 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1597 } 1598 1599 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1600 uint8_t event[13]; 1601 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1602 event[1] = sizeof(event) - 2; 1603 event[2] = status; 1604 bt_store_16(event, 3, conn->con_handle); 1605 bt_flip_addr(&event[5], conn->address); 1606 event[11] = 1; // ACL connection 1607 event[12] = 0; // encryption disabled 1608 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1609 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1610 } 1611 1612 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1613 uint8_t event[6]; 1614 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1615 event[1] = sizeof(event) - 2; 1616 event[2] = 0; // status = OK 1617 bt_store_16(event, 3, handle); 1618 event[5] = reason; 1619 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1620 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1621 } 1622 1623 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1624 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 1625 uint8_t event[4]; 1626 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1627 event[1] = sizeof(event) - 2; 1628 bt_store_16(event, 2, conn->con_handle); 1629 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1630 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1631 } 1632 1633 void hci_emit_nr_connections_changed(){ 1634 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 1635 uint8_t event[3]; 1636 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1637 event[1] = sizeof(event) - 2; 1638 event[2] = nr_hci_connections(); 1639 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1640 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1641 } 1642 1643 void hci_emit_hci_open_failed(){ 1644 log_info("BTSTACK_EVENT_POWERON_FAILED"); 1645 uint8_t event[2]; 1646 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1647 event[1] = sizeof(event) - 2; 1648 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1649 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1650 } 1651 1652 #ifndef EMBEDDED 1653 void hci_emit_btstack_version() { 1654 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 1655 uint8_t event[6]; 1656 event[0] = BTSTACK_EVENT_VERSION; 1657 event[1] = sizeof(event) - 2; 1658 event[2] = BTSTACK_MAJOR; 1659 event[3] = BTSTACK_MINOR; 1660 bt_store_16(event, 4, BTSTACK_REVISION); 1661 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1662 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1663 } 1664 #endif 1665 1666 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1667 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 1668 uint8_t event[3]; 1669 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1670 event[1] = sizeof(event) - 2; 1671 event[2] = enabled; 1672 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1673 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1674 } 1675 1676 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1677 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 1678 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1679 event[1] = sizeof(event) - 2 - 1; 1680 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1681 bt_flip_addr(&event[3], *addr); 1682 memcpy(&event[9], name, 248); 1683 1684 event[9+248] = 0; // assert \0 for log_info 1685 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 1686 1687 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 1688 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 1689 } 1690 1691 void hci_emit_discoverable_enabled(uint8_t enabled){ 1692 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 1693 uint8_t event[3]; 1694 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1695 event[1] = sizeof(event) - 2; 1696 event[2] = enabled; 1697 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1698 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1699 } 1700 1701 void hci_emit_security_level(hci_con_handle_t con_handle, uint8_t status, gap_security_level_t level){ 1702 uint8_t event[6]; 1703 int pos = 0; 1704 event[pos++] = GAP_AUTHENTICATION_RESULT; 1705 event[pos++] = sizeof(event) - 2; 1706 event[pos++] = status; 1707 bt_store_16(event, 3, con_handle); 1708 pos += 2; 1709 event[pos++] = level; 1710 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1711 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1712 } 1713 1714 // GAP API 1715 /** 1716 * @bbrief enable/disable bonding. default is enabled 1717 * @praram enabled 1718 */ 1719 void gap_set_bondable_mode(int enable){ 1720 hci_stack.bondable = enable ? 1 : 0; 1721 } 1722 1723 /** 1724 * @brief get current security level 1725 */ 1726 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 1727 hci_connection_t * connection = hci_connection_for_handle(con_handle); 1728 if (!connection) return LEVEL_0; 1729 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 1730 switch (connection->link_key_type){ 1731 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 1732 return LEVEL_4; 1733 case COMBINATION_KEY: 1734 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 1735 return LEVEL_3; 1736 case DEBUG_COMBINATION_KEY: 1737 default: 1738 return LEVEL_2; 1739 } 1740 } 1741 1742 /** 1743 * @brief request connection to device to 1744 * @result GAP_AUTHENTICATION_RESULT 1745 */ 1746 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 1747 hci_connection_t * connection = hci_connection_for_handle(con_handle); 1748 if (!connection){ 1749 hci_emit_security_level(con_handle, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER, LEVEL_0); 1750 return; 1751 } 1752 // 1753 1754 } 1755