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 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 650 if (!hci_stack.remote_device_db) break; 651 bt_flip_addr(addr, &packet[2]); 652 // @TODO determine link key type 653 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8], LINK_KEY_TYPE_UNAUTHENTICATED); 654 // still forward event to allow dismiss of pairing dialog 655 break; 656 657 case HCI_EVENT_PIN_CODE_REQUEST: 658 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 659 // non-bondable mode: pin code negative reply will be sent 660 if (!hci_stack.bondable){ 661 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_PIN_CODE_REQUEST); 662 hci_run(); 663 return; 664 } 665 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 666 if (!hci_stack.remote_device_db) break; 667 bt_flip_addr(addr, &packet[2]); 668 hci_stack.remote_device_db->delete_link_key(&addr); 669 break; 670 671 case HCI_EVENT_IO_CAPABILITY_REQUEST: 672 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 673 if (!hci_stack.bondable || hci_stack.ssp_io_capability == SSP_IO_CAPABILITY_UNKNOWN) break; 674 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 675 break; 676 677 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 678 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_CONFIRM_REQUEST); 679 if (!hci_stack.ssp_auto_accept) break; 680 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 681 break; 682 683 case HCI_EVENT_USER_PASSKEY_REQUEST: 684 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_PASSKEY_REQUEST); 685 if (!hci_stack.ssp_auto_accept) break; 686 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 687 break; 688 689 case HCI_EVENT_ENCRYPTION_CHANGE: 690 if (packet[2]) break; // error status 691 handle = READ_BT_16(packet, 3); 692 conn = hci_connection_for_handle(handle); 693 if (!conn) break; 694 if (packet[5]){ 695 conn->authentication_flags |= CONNECTION_ENCRYPTED; 696 // @TODO set authentication depending on pairing process 697 } else { 698 conn->authentication_flags &= ~(CONNECTION_ENCRYPTED | CONNECTION_AUTHENTICATED); 699 } 700 break; 701 702 #ifndef EMBEDDED 703 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 704 if (!hci_stack.remote_device_db) break; 705 if (packet[2]) break; // status not ok 706 bt_flip_addr(addr, &packet[3]); 707 // fix for invalid remote names - terminate on 0xff 708 for (i=0; i<248;i++){ 709 if (packet[9+i] == 0xff){ 710 packet[9+i] = 0; 711 break; 712 } 713 } 714 memset(&device_name, 0, sizeof(device_name_t)); 715 strncpy((char*) device_name, (char*) &packet[9], 248); 716 hci_stack.remote_device_db->put_name(&addr, &device_name); 717 break; 718 719 case HCI_EVENT_INQUIRY_RESULT: 720 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 721 if (!hci_stack.remote_device_db) break; 722 // first send inq result packet 723 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 724 // then send cached remote names 725 for (i=0; i<packet[2];i++){ 726 bt_flip_addr(addr, &packet[3+i*6]); 727 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 728 hci_emit_remote_name_cached(&addr, &device_name); 729 } 730 } 731 return; 732 #endif 733 734 case HCI_EVENT_DISCONNECTION_COMPLETE: 735 if (!packet[2]){ 736 handle = READ_BT_16(packet, 3); 737 hci_connection_t * conn = hci_connection_for_handle(handle); 738 if (conn) { 739 hci_shutdown_connection(conn); 740 } 741 } 742 break; 743 744 case HCI_EVENT_HARDWARE_ERROR: 745 if(hci_stack.control && hci_stack.control->hw_error){ 746 (*hci_stack.control->hw_error)(); 747 } 748 break; 749 750 #ifdef HAVE_BLE 751 case HCI_EVENT_LE_META: 752 switch (packet[2]) { 753 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 754 // Connection management 755 bt_flip_addr(addr, &packet[8]); 756 log_info("LE Connection_complete (status=%u) %s\n", packet[3], bd_addr_to_str(addr)); 757 // LE connections are auto-accepted, so just create a connection if there isn't one already 758 conn = connection_for_address(addr); 759 if (packet[3]){ 760 if (conn){ 761 // outgoing connection failed, remove entry 762 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 763 btstack_memory_hci_connection_free( conn ); 764 765 } 766 // if authentication error, also delete link key 767 if (packet[3] == 0x05) { 768 hci_drop_link_key_for_bd_addr(&addr); 769 } 770 break; 771 } 772 if (!conn){ 773 conn = create_connection_for_addr(addr); 774 } 775 if (!conn){ 776 // no memory 777 break; 778 } 779 780 conn->state = OPEN; 781 conn->con_handle = READ_BT_16(packet, 4); 782 783 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 784 785 // restart timer 786 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 787 // run_loop_add_timer(&conn->timeout); 788 789 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 790 791 hci_emit_nr_connections_changed(); 792 break; 793 794 // printf("LE buffer size: %u, count %u\n", READ_BT_16(packet,6), packet[8]); 795 796 default: 797 break; 798 } 799 break; 800 #endif 801 802 default: 803 break; 804 } 805 806 // handle BT initialization 807 if (hci_stack.state == HCI_STATE_INITIALIZING){ 808 if (hci_stack.substate % 2){ 809 // odd: waiting for event 810 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 811 // wait for explicit COMMAND COMPLETE on RESET 812 if (hci_stack.substate > 1 || COMMAND_COMPLETE_EVENT(packet, hci_reset)) { 813 hci_stack.substate++; 814 } 815 } 816 } 817 } 818 819 // help with BT sleep 820 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 821 && hci_stack.substate == 1 822 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 823 hci_stack.substate++; 824 } 825 826 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 827 828 // execute main loop 829 hci_run(); 830 } 831 832 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 833 switch (packet_type) { 834 case HCI_EVENT_PACKET: 835 event_handler(packet, size); 836 break; 837 case HCI_ACL_DATA_PACKET: 838 acl_handler(packet, size); 839 break; 840 default: 841 break; 842 } 843 } 844 845 /** Register HCI packet handlers */ 846 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 847 hci_stack.packet_handler = handler; 848 } 849 850 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 851 852 // reference to use transport layer implementation 853 hci_stack.hci_transport = transport; 854 855 // references to used control implementation 856 hci_stack.control = control; 857 858 // reference to used config 859 hci_stack.config = config; 860 861 // no connections yet 862 hci_stack.connections = NULL; 863 hci_stack.discoverable = 0; 864 hci_stack.connectable = 0; 865 hci_stack.bondable = 1; 866 867 // no pending cmds 868 hci_stack.decline_reason = 0; 869 hci_stack.new_scan_enable_value = 0xff; 870 871 // higher level handler 872 hci_stack.packet_handler = dummy_handler; 873 874 // store and open remote device db 875 hci_stack.remote_device_db = remote_device_db; 876 if (hci_stack.remote_device_db) { 877 hci_stack.remote_device_db->open(); 878 } 879 880 // max acl payload size defined in config.h 881 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 882 883 // register packet handlers with transport 884 transport->register_packet_handler(&packet_handler); 885 886 hci_stack.state = HCI_STATE_OFF; 887 888 // class of device 889 hci_stack.class_of_device = 0x007a020c; // Smartphone 890 891 // Secure Simple Pairing default: enable, no I/O capabilities, auto accept 892 hci_stack.ssp_enable = 1; 893 hci_stack.ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 894 hci_stack.ssp_authentication_requirement = 0; 895 hci_stack.ssp_auto_accept = 1; 896 897 // LE 898 hci_stack.adv_addr_type = 0; 899 memset(hci_stack.adv_address, 0, 6); 900 } 901 902 void hci_close(){ 903 // close remote device db 904 if (hci_stack.remote_device_db) { 905 hci_stack.remote_device_db->close(); 906 } 907 while (hci_stack.connections) { 908 hci_shutdown_connection((hci_connection_t *) hci_stack.connections); 909 } 910 hci_power_control(HCI_POWER_OFF); 911 } 912 913 // State-Module-Driver overview 914 // state module low-level 915 // HCI_STATE_OFF off close 916 // HCI_STATE_INITIALIZING, on open 917 // HCI_STATE_WORKING, on open 918 // HCI_STATE_HALTING, on open 919 // HCI_STATE_SLEEPING, off/sleep close 920 // HCI_STATE_FALLING_ASLEEP on open 921 922 static int hci_power_control_on(void){ 923 924 // power on 925 int err = 0; 926 if (hci_stack.control && hci_stack.control->on){ 927 err = (*hci_stack.control->on)(hci_stack.config); 928 } 929 if (err){ 930 log_error( "POWER_ON failed\n"); 931 hci_emit_hci_open_failed(); 932 return err; 933 } 934 935 // open low-level device 936 err = hci_stack.hci_transport->open(hci_stack.config); 937 if (err){ 938 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 939 if (hci_stack.control && hci_stack.control->off){ 940 (*hci_stack.control->off)(hci_stack.config); 941 } 942 hci_emit_hci_open_failed(); 943 return err; 944 } 945 return 0; 946 } 947 948 static void hci_power_control_off(void){ 949 950 log_info("hci_power_control_off\n"); 951 952 // close low-level device 953 hci_stack.hci_transport->close(hci_stack.config); 954 955 log_info("hci_power_control_off - hci_transport closed\n"); 956 957 // power off 958 if (hci_stack.control && hci_stack.control->off){ 959 (*hci_stack.control->off)(hci_stack.config); 960 } 961 962 log_info("hci_power_control_off - control closed\n"); 963 964 hci_stack.state = HCI_STATE_OFF; 965 } 966 967 static void hci_power_control_sleep(void){ 968 969 log_info("hci_power_control_sleep\n"); 970 971 #if 0 972 // don't close serial port during sleep 973 974 // close low-level device 975 hci_stack.hci_transport->close(hci_stack.config); 976 #endif 977 978 // sleep mode 979 if (hci_stack.control && hci_stack.control->sleep){ 980 (*hci_stack.control->sleep)(hci_stack.config); 981 } 982 983 hci_stack.state = HCI_STATE_SLEEPING; 984 } 985 986 static int hci_power_control_wake(void){ 987 988 log_info("hci_power_control_wake\n"); 989 990 // wake on 991 if (hci_stack.control && hci_stack.control->wake){ 992 (*hci_stack.control->wake)(hci_stack.config); 993 } 994 995 #if 0 996 // open low-level device 997 int err = hci_stack.hci_transport->open(hci_stack.config); 998 if (err){ 999 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1000 if (hci_stack.control && hci_stack.control->off){ 1001 (*hci_stack.control->off)(hci_stack.config); 1002 } 1003 hci_emit_hci_open_failed(); 1004 return err; 1005 } 1006 #endif 1007 1008 return 0; 1009 } 1010 1011 1012 int hci_power_control(HCI_POWER_MODE power_mode){ 1013 1014 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 1015 1016 int err = 0; 1017 switch (hci_stack.state){ 1018 1019 case HCI_STATE_OFF: 1020 switch (power_mode){ 1021 case HCI_POWER_ON: 1022 err = hci_power_control_on(); 1023 if (err) return err; 1024 // set up state machine 1025 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1026 hci_stack.state = HCI_STATE_INITIALIZING; 1027 hci_stack.substate = 0; 1028 break; 1029 case HCI_POWER_OFF: 1030 // do nothing 1031 break; 1032 case HCI_POWER_SLEEP: 1033 // do nothing (with SLEEP == OFF) 1034 break; 1035 } 1036 break; 1037 1038 case HCI_STATE_INITIALIZING: 1039 switch (power_mode){ 1040 case HCI_POWER_ON: 1041 // do nothing 1042 break; 1043 case HCI_POWER_OFF: 1044 // no connections yet, just turn it off 1045 hci_power_control_off(); 1046 break; 1047 case HCI_POWER_SLEEP: 1048 // no connections yet, just turn it off 1049 hci_power_control_sleep(); 1050 break; 1051 } 1052 break; 1053 1054 case HCI_STATE_WORKING: 1055 switch (power_mode){ 1056 case HCI_POWER_ON: 1057 // do nothing 1058 break; 1059 case HCI_POWER_OFF: 1060 // see hci_run 1061 hci_stack.state = HCI_STATE_HALTING; 1062 break; 1063 case HCI_POWER_SLEEP: 1064 // see hci_run 1065 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 1066 hci_stack.substate = 0; 1067 break; 1068 } 1069 break; 1070 1071 case HCI_STATE_HALTING: 1072 switch (power_mode){ 1073 case HCI_POWER_ON: 1074 // set up state machine 1075 hci_stack.state = HCI_STATE_INITIALIZING; 1076 hci_stack.substate = 0; 1077 break; 1078 case HCI_POWER_OFF: 1079 // do nothing 1080 break; 1081 case HCI_POWER_SLEEP: 1082 // see hci_run 1083 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 1084 hci_stack.substate = 0; 1085 break; 1086 } 1087 break; 1088 1089 case HCI_STATE_FALLING_ASLEEP: 1090 switch (power_mode){ 1091 case HCI_POWER_ON: 1092 1093 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1094 // nothing to do, if H4 supports power management 1095 if (bt_control_iphone_power_management_enabled()){ 1096 hci_stack.state = HCI_STATE_INITIALIZING; 1097 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1098 break; 1099 } 1100 #endif 1101 // set up state machine 1102 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1103 hci_stack.state = HCI_STATE_INITIALIZING; 1104 hci_stack.substate = 0; 1105 break; 1106 case HCI_POWER_OFF: 1107 // see hci_run 1108 hci_stack.state = HCI_STATE_HALTING; 1109 break; 1110 case HCI_POWER_SLEEP: 1111 // do nothing 1112 break; 1113 } 1114 break; 1115 1116 case HCI_STATE_SLEEPING: 1117 switch (power_mode){ 1118 case HCI_POWER_ON: 1119 1120 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1121 // nothing to do, if H4 supports power management 1122 if (bt_control_iphone_power_management_enabled()){ 1123 hci_stack.state = HCI_STATE_INITIALIZING; 1124 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1125 hci_update_scan_enable(); 1126 break; 1127 } 1128 #endif 1129 err = hci_power_control_wake(); 1130 if (err) return err; 1131 // set up state machine 1132 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1133 hci_stack.state = HCI_STATE_INITIALIZING; 1134 hci_stack.substate = 0; 1135 break; 1136 case HCI_POWER_OFF: 1137 hci_stack.state = HCI_STATE_HALTING; 1138 break; 1139 case HCI_POWER_SLEEP: 1140 // do nothing 1141 break; 1142 } 1143 break; 1144 } 1145 1146 // create internal event 1147 hci_emit_state(); 1148 1149 // trigger next/first action 1150 hci_run(); 1151 1152 return 0; 1153 } 1154 1155 static void hci_update_scan_enable(void){ 1156 // 2 = page scan, 1 = inq scan 1157 hci_stack.new_scan_enable_value = hci_stack.connectable << 1 | hci_stack.discoverable; 1158 hci_run(); 1159 } 1160 1161 void hci_discoverable_control(uint8_t enable){ 1162 if (enable) enable = 1; // normalize argument 1163 1164 if (hci_stack.discoverable == enable){ 1165 hci_emit_discoverable_enabled(hci_stack.discoverable); 1166 return; 1167 } 1168 1169 hci_stack.discoverable = enable; 1170 hci_update_scan_enable(); 1171 } 1172 1173 void hci_connectable_control(uint8_t enable){ 1174 if (enable) enable = 1; // normalize argument 1175 1176 // don't emit event 1177 if (hci_stack.connectable == enable) return; 1178 1179 hci_stack.connectable = enable; 1180 hci_update_scan_enable(); 1181 } 1182 1183 bd_addr_t * hci_local_bd_addr(void){ 1184 return &hci_stack.local_bd_addr; 1185 } 1186 1187 void hci_run(){ 1188 1189 hci_connection_t * connection; 1190 linked_item_t * it; 1191 1192 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1193 1194 // global/non-connection oriented commands 1195 1196 // decline incoming connections 1197 if (hci_stack.decline_reason){ 1198 uint8_t reason = hci_stack.decline_reason; 1199 hci_stack.decline_reason = 0; 1200 hci_send_cmd(&hci_reject_connection_request, hci_stack.decline_addr, reason); 1201 return; 1202 } 1203 1204 // send scan enable 1205 if (hci_stack.state == HCI_STATE_WORKING && hci_stack.new_scan_enable_value != 0xff && hci_classic_supported()){ 1206 hci_send_cmd(&hci_write_scan_enable, hci_stack.new_scan_enable_value); 1207 hci_stack.new_scan_enable_value = 0xff; 1208 return; 1209 } 1210 1211 // send pending HCI commands 1212 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 1213 1214 connection = (hci_connection_t *) it; 1215 1216 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 1217 log_info("sending hci_accept_connection_request\n"); 1218 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1219 connection->state = ACCEPTED_CONNECTION_REQUEST; 1220 return; 1221 } 1222 1223 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1224 link_key_t link_key; 1225 link_key_type_t link_key_type; 1226 log_info("responding to link key request\n"); 1227 if ( hci_stack.bondable && hci_stack.remote_device_db && hci_stack.remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 1228 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1229 } else { 1230 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1231 } 1232 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1233 return; 1234 } 1235 1236 if (connection->authentication_flags & HANDLE_PIN_CODE_REQUEST){ 1237 log_info("denying to pin request\n"); 1238 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 1239 connectionClearAuthenticationFlags(connection, HANDLE_PIN_CODE_REQUEST); 1240 return; 1241 } 1242 1243 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1244 if (hci_stack.bondable){ 1245 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack.ssp_io_capability, NULL, hci_stack.ssp_authentication_requirement); 1246 } else { 1247 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 1248 } 1249 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1250 return; 1251 } 1252 1253 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1254 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1255 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1256 return; 1257 } 1258 1259 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1260 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1261 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1262 return; 1263 } 1264 1265 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 1266 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 1267 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 1268 } 1269 } 1270 1271 switch (hci_stack.state){ 1272 case HCI_STATE_INITIALIZING: 1273 // log_info("hci_init: substate %u\n", hci_stack.substate); 1274 if (hci_stack.substate % 2) { 1275 // odd: waiting for command completion 1276 return; 1277 } 1278 switch (hci_stack.substate >> 1){ 1279 case 0: // RESET 1280 hci_send_cmd(&hci_reset); 1281 1282 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 1283 // skip baud change 1284 hci_stack.substate = 4; // >> 1 = 2 1285 } 1286 break; 1287 case 1: // SEND BAUD CHANGE 1288 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_packet_buffer); 1289 hci_send_cmd_packet(hci_stack.hci_packet_buffer, 3 + hci_stack.hci_packet_buffer[2]); 1290 break; 1291 case 2: // LOCAL BAUD CHANGE 1292 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 1293 hci_stack.substate += 2; 1294 // break missing here for fall through 1295 1296 case 3: 1297 // Custom initialization 1298 if (hci_stack.control && hci_stack.control->next_cmd){ 1299 int valid_cmd = (*hci_stack.control->next_cmd)(hci_stack.config, hci_stack.hci_packet_buffer); 1300 if (valid_cmd){ 1301 int size = 3 + hci_stack.hci_packet_buffer[2]; 1302 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack.hci_packet_buffer, size); 1303 hci_stack.substate = 4; // more init commands 1304 break; 1305 } 1306 log_info("hci_run: init script done\n\r"); 1307 } 1308 // otherwise continue 1309 hci_send_cmd(&hci_read_bd_addr); 1310 break; 1311 case 4: 1312 hci_send_cmd(&hci_read_buffer_size); 1313 break; 1314 case 5: 1315 hci_send_cmd(&hci_read_local_supported_features); 1316 break; 1317 case 6: 1318 if (hci_le_supported()){ 1319 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1320 } else { 1321 // Kensington Bluetoot 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1322 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1323 } 1324 1325 // skip Classic init commands for LE only chipsets 1326 if (!hci_classic_supported()){ 1327 if (hci_le_supported()){ 1328 hci_stack.substate = 11 << 1; // skip all classic command 1329 } else { 1330 log_error("Neither BR/EDR nor LE supported"); 1331 hci_stack.substate = 13 << 1; // skip all 1332 } 1333 } 1334 break; 1335 case 7: 1336 if (hci_ssp_supported()){ 1337 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack.ssp_enable); 1338 break; 1339 } 1340 hci_stack.substate += 2; 1341 // break missing here for fall through 1342 1343 case 8: 1344 // ca. 15 sec 1345 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1346 break; 1347 case 9: 1348 hci_send_cmd(&hci_write_class_of_device, hci_stack.class_of_device); 1349 break; 1350 case 10: 1351 if (hci_stack.local_name){ 1352 hci_send_cmd(&hci_write_local_name, hci_stack.local_name); 1353 } else { 1354 char hostname[30]; 1355 #ifdef EMBEDDED 1356 // BTstack-11:22:33:44:55:66 1357 strcpy(hostname, "BTstack "); 1358 strcat(hostname, bd_addr_to_str(hci_stack.local_bd_addr)); 1359 printf("---> Name %s\n", hostname); 1360 #else 1361 // hostname for POSIX systems 1362 gethostname(hostname, 30); 1363 hostname[29] = '\0'; 1364 #endif 1365 hci_send_cmd(&hci_write_local_name, hostname); 1366 } 1367 break; 1368 case 11: 1369 hci_send_cmd(&hci_write_scan_enable, (hci_stack.connectable << 1) | hci_stack.discoverable); // page scan 1370 if (!hci_le_supported()){ 1371 // SKIP LE init for Classic only configuration 1372 hci_stack.substate = 13 << 1; 1373 } 1374 break; 1375 1376 #ifdef HAVE_BLE 1377 // LE INIT 1378 case 12: 1379 hci_send_cmd(&hci_le_read_buffer_size); 1380 break; 1381 case 13: 1382 // LE Supported Host = 1, Simultaneous Host = 0 1383 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1384 break; 1385 #endif 1386 1387 // DONE 1388 case 14: 1389 // done. 1390 hci_stack.state = HCI_STATE_WORKING; 1391 hci_emit_state(); 1392 break; 1393 default: 1394 break; 1395 } 1396 hci_stack.substate++; 1397 break; 1398 1399 case HCI_STATE_HALTING: 1400 1401 log_info("HCI_STATE_HALTING\n"); 1402 // close all open connections 1403 connection = (hci_connection_t *) hci_stack.connections; 1404 if (connection){ 1405 1406 // send disconnect 1407 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1408 1409 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1410 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1411 1412 // send disconnected event right away - causes higher layer connections to get closed, too. 1413 hci_shutdown_connection(connection); 1414 return; 1415 } 1416 log_info("HCI_STATE_HALTING, calling off\n"); 1417 1418 // switch mode 1419 hci_power_control_off(); 1420 1421 log_info("HCI_STATE_HALTING, emitting state\n"); 1422 hci_emit_state(); 1423 log_info("HCI_STATE_HALTING, done\n"); 1424 break; 1425 1426 case HCI_STATE_FALLING_ASLEEP: 1427 switch(hci_stack.substate) { 1428 case 0: 1429 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1430 // close all open connections 1431 connection = (hci_connection_t *) hci_stack.connections; 1432 1433 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1434 // don't close connections, if H4 supports power management 1435 if (bt_control_iphone_power_management_enabled()){ 1436 connection = NULL; 1437 } 1438 #endif 1439 if (connection){ 1440 1441 // send disconnect 1442 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1443 1444 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1445 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1446 1447 // send disconnected event right away - causes higher layer connections to get closed, too. 1448 hci_shutdown_connection(connection); 1449 return; 1450 } 1451 1452 if (hci_classic_supported()){ 1453 // disable page and inquiry scan 1454 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1455 1456 log_info("HCI_STATE_HALTING, disabling inq scans\n"); 1457 hci_send_cmd(&hci_write_scan_enable, hci_stack.connectable << 1); // drop inquiry scan but keep page scan 1458 1459 // continue in next sub state 1460 hci_stack.substate++; 1461 break; 1462 } 1463 // fall through for ble-only chips 1464 1465 case 2: 1466 log_info("HCI_STATE_HALTING, calling sleep\n"); 1467 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1468 // don't actually go to sleep, if H4 supports power management 1469 if (bt_control_iphone_power_management_enabled()){ 1470 // SLEEP MODE reached 1471 hci_stack.state = HCI_STATE_SLEEPING; 1472 hci_emit_state(); 1473 break; 1474 } 1475 #endif 1476 // switch mode 1477 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1478 hci_emit_state(); 1479 break; 1480 1481 default: 1482 break; 1483 } 1484 break; 1485 1486 default: 1487 break; 1488 } 1489 } 1490 1491 int hci_send_cmd_packet(uint8_t *packet, int size){ 1492 bd_addr_t addr; 1493 hci_connection_t * conn; 1494 // house-keeping 1495 1496 // create_connection? 1497 if (IS_COMMAND(packet, hci_create_connection)){ 1498 bt_flip_addr(addr, &packet[3]); 1499 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1500 conn = connection_for_address(addr); 1501 if (conn) { 1502 // if connection exists 1503 if (conn->state == OPEN) { 1504 // and OPEN, emit connection complete command 1505 hci_emit_connection_complete(conn, 0); 1506 } 1507 // otherwise, just ignore as it is already in the open process 1508 return 0; // don't sent packet to controller 1509 1510 } 1511 // create connection struct and register, state = SENT_CREATE_CONNECTION 1512 conn = create_connection_for_addr(addr); 1513 if (!conn){ 1514 // notify client that alloc failed 1515 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1516 return 0; // don't sent packet to controller 1517 } 1518 conn->state = SENT_CREATE_CONNECTION; 1519 } 1520 1521 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1522 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1523 } 1524 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1525 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1526 } 1527 // if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1528 // hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1529 // } 1530 // if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1531 // hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 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 // GAP API 1702 /** 1703 * @bbrief enable/disable bonding. default is enabled 1704 * @praram enabled 1705 */ 1706 void gap_set_bondable_mode(int enable){ 1707 hci_stack.bondable = enable ? 1 : 0; 1708 } 1709 1710 /** 1711 * @brief get current security level 1712 */ 1713 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 1714 return LEVEL_0; 1715 } 1716 1717 /** 1718 * @brief request connection to device to 1719 * @result GAP_AUTHENTICATION_RESULT 1720 */ 1721 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 1722 } 1723