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 48 #include <stdarg.h> 49 #include <string.h> 50 #include <stdio.h> 51 52 #ifndef EMBEDDED 53 #include <unistd.h> // gethostbyname 54 #include <btstack/version.h> 55 #endif 56 57 #include "btstack_memory.h" 58 #include "debug.h" 59 #include "hci_dump.h" 60 61 #include <btstack/hci_cmds.h> 62 63 #define HCI_CONNECTION_TIMEOUT_MS 10000 64 65 #define HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP 11 66 67 #ifdef USE_BLUETOOL 68 #include "bt_control_iphone.h" 69 #endif 70 71 static void hci_update_scan_enable(void); 72 73 // the STACK is here 74 static hci_stack_t hci_stack; 75 76 /** 77 * get connection for a given handle 78 * 79 * @return connection OR NULL, if not found 80 */ 81 hci_connection_t * connection_for_handle(hci_con_handle_t con_handle){ 82 linked_item_t *it; 83 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 84 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 85 return (hci_connection_t *) it; 86 } 87 } 88 return NULL; 89 } 90 91 static void hci_connection_timeout_handler(timer_source_t *timer){ 92 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 93 #ifdef HAVE_TIME 94 struct timeval tv; 95 gettimeofday(&tv, NULL); 96 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 97 // connections might be timed out 98 hci_emit_l2cap_check_timeout(connection); 99 } 100 #endif 101 #ifdef HAVE_TICK 102 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 103 // connections might be timed out 104 hci_emit_l2cap_check_timeout(connection); 105 } 106 #endif 107 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 108 run_loop_add_timer(timer); 109 } 110 111 static void hci_connection_timestamp(hci_connection_t *connection){ 112 #ifdef HAVE_TIME 113 gettimeofday(&connection->timestamp, NULL); 114 #endif 115 #ifdef HAVE_TICK 116 connection->timestamp = embedded_get_ticks(); 117 #endif 118 } 119 120 /** 121 * create connection for given address 122 * 123 * @return connection OR NULL, if no memory left 124 */ 125 static hci_connection_t * create_connection_for_addr(bd_addr_t addr){ 126 hci_connection_t * conn = (hci_connection_t *) btstack_memory_hci_connection_get(); 127 if (!conn) return NULL; 128 BD_ADDR_COPY(conn->address, addr); 129 conn->con_handle = 0xffff; 130 conn->authentication_flags = AUTH_FLAGS_NONE; 131 linked_item_set_user(&conn->timeout.item, conn); 132 conn->timeout.process = hci_connection_timeout_handler; 133 hci_connection_timestamp(conn); 134 conn->acl_recombination_length = 0; 135 conn->acl_recombination_pos = 0; 136 conn->num_acl_packets_sent = 0; 137 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 138 return conn; 139 } 140 141 /** 142 * get connection for given address 143 * 144 * @return connection OR NULL, if not found 145 */ 146 static hci_connection_t * connection_for_address(bd_addr_t address){ 147 linked_item_t *it; 148 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 149 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 150 return (hci_connection_t *) it; 151 } 152 } 153 return NULL; 154 } 155 156 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 157 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 158 } 159 160 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 161 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 162 } 163 164 165 /** 166 * add authentication flags and reset timer 167 */ 168 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 169 bd_addr_t addr; 170 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 171 hci_connection_t * conn = connection_for_address(addr); 172 if (conn) { 173 connectionSetAuthenticationFlags(conn, flags); 174 hci_connection_timestamp(conn); 175 } 176 } 177 178 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 179 hci_connection_t * conn = connection_for_handle(handle); 180 if (!conn) return 0; 181 if (!conn->authentication_flags) return 0; 182 if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0; 183 if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0; 184 return 1; 185 } 186 187 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 188 if (hci_stack.remote_device_db) { 189 hci_stack.remote_device_db->delete_link_key(addr); 190 } 191 } 192 193 194 /** 195 * count connections 196 */ 197 static int nr_hci_connections(void){ 198 int count = 0; 199 linked_item_t *it; 200 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 201 return count; 202 } 203 204 /** 205 * Dummy handler called by HCI 206 */ 207 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 208 } 209 210 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 211 hci_connection_t * connection = connection_for_handle(handle); 212 if (!connection) { 213 log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 214 return 0; 215 } 216 return connection->num_acl_packets_sent; 217 } 218 219 uint8_t hci_number_free_acl_slots(){ 220 uint8_t free_slots = hci_stack.total_num_acl_packets; 221 linked_item_t *it; 222 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 223 hci_connection_t * connection = (hci_connection_t *) it; 224 if (free_slots < connection->num_acl_packets_sent) { 225 log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 226 return 0; 227 } 228 free_slots -= connection->num_acl_packets_sent; 229 } 230 return free_slots; 231 } 232 233 int hci_can_send_packet_now(uint8_t packet_type){ 234 235 // check for async hci transport implementations 236 if (hci_stack.hci_transport->can_send_packet_now){ 237 if (!hci_stack.hci_transport->can_send_packet_now(packet_type)){ 238 return 0; 239 } 240 } 241 242 // check regular Bluetooth flow control 243 switch (packet_type) { 244 case HCI_ACL_DATA_PACKET: 245 return hci_number_free_acl_slots(); 246 case HCI_COMMAND_DATA_PACKET: 247 return hci_stack.num_cmd_packets; 248 default: 249 return 0; 250 } 251 } 252 253 int hci_send_acl_packet(uint8_t *packet, int size){ 254 255 // check for free places on BT module 256 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 257 258 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 259 hci_connection_t *connection = connection_for_handle( con_handle); 260 if (!connection) return 0; 261 hci_connection_timestamp(connection); 262 263 // count packet 264 connection->num_acl_packets_sent++; 265 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 266 267 // send packet 268 int err = hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 269 270 return err; 271 } 272 273 static void acl_handler(uint8_t *packet, int size){ 274 275 // get info 276 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 277 hci_connection_t *conn = connection_for_handle(con_handle); 278 uint8_t acl_flags = READ_ACL_FLAGS(packet); 279 uint16_t acl_length = READ_ACL_LENGTH(packet); 280 281 // ignore non-registered handle 282 if (!conn){ 283 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 284 return; 285 } 286 287 // update idle timestamp 288 hci_connection_timestamp(conn); 289 290 // handle different packet types 291 switch (acl_flags & 0x03) { 292 293 case 0x01: // continuation fragment 294 295 // sanity check 296 if (conn->acl_recombination_pos == 0) { 297 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 298 return; 299 } 300 301 // append fragment payload (header already stored) 302 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 303 conn->acl_recombination_pos += acl_length; 304 305 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 306 // conn->acl_recombination_pos, conn->acl_recombination_length); 307 308 // forward complete L2CAP packet if complete. 309 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 310 311 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 312 // reset recombination buffer 313 conn->acl_recombination_length = 0; 314 conn->acl_recombination_pos = 0; 315 } 316 break; 317 318 case 0x02: { // first fragment 319 320 // sanity check 321 if (conn->acl_recombination_pos) { 322 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 323 return; 324 } 325 326 // peek into L2CAP packet! 327 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 328 329 // log_error( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 330 331 // compare fragment size to L2CAP packet size 332 if (acl_length >= l2cap_length + 4){ 333 334 // forward fragment as L2CAP packet 335 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 336 337 } else { 338 // store first fragment and tweak acl length for complete package 339 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 340 conn->acl_recombination_pos = acl_length + 4; 341 conn->acl_recombination_length = l2cap_length; 342 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 343 } 344 break; 345 346 } 347 default: 348 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 349 return; 350 } 351 352 // execute main loop 353 hci_run(); 354 } 355 356 static void hci_shutdown_connection(hci_connection_t *conn){ 357 log_info("Connection closed: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 358 359 // cancel all l2cap connections 360 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 361 362 run_loop_remove_timer(&conn->timeout); 363 364 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 365 btstack_memory_hci_connection_free( conn ); 366 367 // now it's gone 368 hci_emit_nr_connections_changed(); 369 } 370 371 static const uint16_t packet_type_sizes[] = { 372 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 373 HCI_ACL_DH1_SIZE, 0, 0, 0, 374 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 375 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 376 }; 377 static const uint8_t packet_type_feature_requirement_bit[] = { 378 0, // 3 slot packets 379 1, // 5 slot packets 380 25, // EDR 2 mpbs 381 26, // EDR 3 mbps 382 39, // 3 slot EDR packts 383 40, // 5 slot EDR packet 384 }; 385 static const uint16_t packet_type_feature_packet_mask[] = { 386 0x0f00, // 3 slot packets 387 0xf000, // 5 slot packets 388 0x1102, // EDR 2 mpbs 389 0x2204, // EDR 3 mbps 390 0x0300, // 3 slot EDR packts 391 0x3000, // 5 slot EDR packet 392 }; 393 394 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 395 // enable packet types based on size 396 uint16_t packet_types = 0; 397 int i; 398 for (i=0;i<16;i++){ 399 if (packet_type_sizes[i] == 0) continue; 400 if (packet_type_sizes[i] <= buffer_size){ 401 packet_types |= 1 << i; 402 } 403 } 404 // disable packet types due to missing local supported features 405 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 406 int bit_idx = packet_type_feature_requirement_bit[i]; 407 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 408 if (feature_set) continue; 409 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 410 packet_types &= ~packet_type_feature_packet_mask[i]; 411 } 412 // flip bits for "may not be used" 413 packet_types ^= 0x3306; 414 return packet_types; 415 } 416 417 uint16_t hci_usable_acl_packet_types(void){ 418 return hci_stack.packet_types; 419 } 420 421 uint8_t* hci_get_outgoing_acl_packet_buffer(void){ 422 // hci packet buffer is >= acl data packet length 423 return hci_stack.hci_packet_buffer; 424 } 425 426 uint16_t hci_max_acl_data_packet_length(void){ 427 return hci_stack.acl_data_packet_length; 428 } 429 430 int hci_ssp_supported(void){ 431 // No 51, byte 6, bit 3 432 return (hci_stack.local_supported_features[6] & (1 << 3)) != 0; 433 } 434 435 int hci_classic_supported(void){ 436 // No 37, byte 4, bit 5, = No BR/EDR Support 437 return (hci_stack.local_supported_features[4] & (1 << 5)) == 0; 438 } 439 440 int hci_le_supported(void){ 441 // No 37, byte 4, bit 6 = LE Supported (Controller) 442 #ifdef HAVE_BLE 443 return (hci_stack.local_supported_features[4] & (1 << 6)) != 0; 444 #else 445 return 0; 446 #endif 447 } 448 449 // avoid huge local variables 450 #ifndef EMBEDDED 451 static device_name_t device_name; 452 #endif 453 static void event_handler(uint8_t *packet, int size){ 454 bd_addr_t addr; 455 uint8_t link_type; 456 hci_con_handle_t handle; 457 hci_connection_t * conn; 458 int i; 459 460 // printf("HCI:EVENT:%02x\n", packet[0]); 461 462 switch (packet[0]) { 463 464 case HCI_EVENT_COMMAND_COMPLETE: 465 // get num cmd packets 466 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]); 467 hci_stack.num_cmd_packets = packet[2]; 468 469 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 470 // from offset 5 471 // status 472 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 473 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 474 // ignore: SCO data packet len (8) 475 hci_stack.total_num_acl_packets = packet[9]; 476 // ignore: total num SCO packets 477 if (hci_stack.state == HCI_STATE_INITIALIZING){ 478 // determine usable ACL payload size 479 if (HCI_ACL_PAYLOAD_SIZE < hci_stack.acl_data_packet_length){ 480 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 481 } 482 log_info("hci_read_buffer_size: used size %u, count %u\n", 483 hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 484 } 485 } 486 #ifdef HAVE_BLE 487 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 488 hci_stack.le_data_packet_length = READ_BT_16(packet, 6); 489 hci_stack.total_num_le_packets = packet[8]; 490 log_info("hci_le_read_buffer_size: size %u, count %u\n", hci_stack.le_data_packet_length, hci_stack.total_num_le_packets); 491 } 492 #endif 493 // Dump local address 494 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 495 bt_flip_addr(hci_stack.local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 496 log_info("Local Address, Status: 0x%02x: Addr: %s\n", 497 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack.local_bd_addr)); 498 } 499 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 500 hci_emit_discoverable_enabled(hci_stack.discoverable); 501 } 502 // Note: HCI init checks 503 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 504 memcpy(hci_stack.local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 505 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 506 hci_stack.local_supported_features[0], hci_stack.local_supported_features[1], 507 hci_stack.local_supported_features[2], hci_stack.local_supported_features[3], 508 hci_stack.local_supported_features[4], hci_stack.local_supported_features[5], 509 hci_stack.local_supported_features[6], hci_stack.local_supported_features[7]); 510 511 // determine usable ACL packet types based buffer size and supported features 512 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]); 513 log_info("packet types %04x", hci_stack.packet_types); 514 515 // Classic/LE 516 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 517 } 518 break; 519 520 case HCI_EVENT_COMMAND_STATUS: 521 // get num cmd packets 522 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]); 523 hci_stack.num_cmd_packets = packet[3]; 524 break; 525 526 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 527 for (i=0; i<packet[2];i++){ 528 handle = READ_BT_16(packet, 3 + 2*i); 529 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 530 conn = connection_for_handle(handle); 531 if (!conn){ 532 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 533 continue; 534 } 535 conn->num_acl_packets_sent -= num_packets; 536 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 537 } 538 break; 539 540 case HCI_EVENT_CONNECTION_REQUEST: 541 bt_flip_addr(addr, &packet[2]); 542 // TODO: eval COD 8-10 543 link_type = packet[11]; 544 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 545 if (link_type == 1) { // ACL 546 conn = connection_for_address(addr); 547 if (!conn) { 548 conn = create_connection_for_addr(addr); 549 } 550 if (!conn) { 551 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 552 hci_stack.decline_reason = 0x0d; 553 BD_ADDR_COPY(hci_stack.decline_addr, addr); 554 break; 555 } 556 conn->state = RECEIVED_CONNECTION_REQUEST; 557 hci_run(); 558 } else { 559 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 560 hci_stack.decline_reason = 0x0a; 561 BD_ADDR_COPY(hci_stack.decline_addr, addr); 562 } 563 break; 564 565 case HCI_EVENT_CONNECTION_COMPLETE: 566 // Connection management 567 bt_flip_addr(addr, &packet[5]); 568 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 569 conn = connection_for_address(addr); 570 if (conn) { 571 if (!packet[2]){ 572 conn->state = OPEN; 573 conn->con_handle = READ_BT_16(packet, 3); 574 575 // restart timer 576 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 577 run_loop_add_timer(&conn->timeout); 578 579 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 580 581 hci_emit_nr_connections_changed(); 582 } else { 583 // connection failed, remove entry 584 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 585 btstack_memory_hci_connection_free( conn ); 586 587 // if authentication error, also delete link key 588 if (packet[2] == 0x05) { 589 hci_drop_link_key_for_bd_addr(&addr); 590 } 591 } 592 } 593 break; 594 595 case HCI_EVENT_LINK_KEY_REQUEST: 596 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 597 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 598 if (!hci_stack.remote_device_db) break; 599 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 600 hci_run(); 601 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 602 return; 603 604 case HCI_EVENT_LINK_KEY_NOTIFICATION: 605 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 606 if (!hci_stack.remote_device_db) break; 607 bt_flip_addr(addr, &packet[2]); 608 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 609 // still forward event to allow dismiss of pairing dialog 610 break; 611 612 case HCI_EVENT_PIN_CODE_REQUEST: 613 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 614 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 615 if (!hci_stack.remote_device_db) break; 616 bt_flip_addr(addr, &packet[2]); 617 hci_stack.remote_device_db->delete_link_key(&addr); 618 break; 619 620 case HCI_EVENT_IO_CAPABILITY_REQUEST: 621 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 622 if (hci_stack.ssp_io_capability == SSP_IO_CAPABILITY_UNKNOWN) break; 623 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 624 break; 625 626 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 627 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_CONFIRM_REQUEST); 628 if (!hci_stack.ssp_auto_accept) break; 629 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 630 break; 631 632 case HCI_EVENT_USER_PASSKEY_REQUEST: 633 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_PASSKEY_REQUEST); 634 if (!hci_stack.ssp_auto_accept) break; 635 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 636 break; 637 638 #ifndef EMBEDDED 639 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 640 if (!hci_stack.remote_device_db) break; 641 if (packet[2]) break; // status not ok 642 bt_flip_addr(addr, &packet[3]); 643 // fix for invalid remote names - terminate on 0xff 644 for (i=0; i<248;i++){ 645 if (packet[9+i] == 0xff){ 646 packet[9+i] = 0; 647 break; 648 } 649 } 650 memset(&device_name, 0, sizeof(device_name_t)); 651 strncpy((char*) device_name, (char*) &packet[9], 248); 652 hci_stack.remote_device_db->put_name(&addr, &device_name); 653 break; 654 655 case HCI_EVENT_INQUIRY_RESULT: 656 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 657 if (!hci_stack.remote_device_db) break; 658 // first send inq result packet 659 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 660 // then send cached remote names 661 for (i=0; i<packet[2];i++){ 662 bt_flip_addr(addr, &packet[3+i*6]); 663 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 664 hci_emit_remote_name_cached(&addr, &device_name); 665 } 666 } 667 return; 668 #endif 669 670 case HCI_EVENT_DISCONNECTION_COMPLETE: 671 if (!packet[2]){ 672 handle = READ_BT_16(packet, 3); 673 hci_connection_t * conn = connection_for_handle(handle); 674 if (conn) { 675 hci_shutdown_connection(conn); 676 } 677 } 678 break; 679 680 case HCI_EVENT_HARDWARE_ERROR: 681 if(hci_stack.control->hw_error){ 682 (*hci_stack.control->hw_error)(); 683 } 684 break; 685 686 #ifdef HAVE_BLE 687 case HCI_EVENT_LE_META: 688 switch (packet[2]) { 689 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 690 // Connection management 691 bt_flip_addr(addr, &packet[8]); 692 log_info("LE Connection_complete (status=%u) %s\n", packet[3], bd_addr_to_str(addr)); 693 // LE connections are auto-accepted, so just create a connection if there isn't one already 694 conn = connection_for_address(addr); 695 if (packet[3]){ 696 if (conn){ 697 // outgoing connection failed, remove entry 698 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 699 btstack_memory_hci_connection_free( conn ); 700 701 } 702 // if authentication error, also delete link key 703 if (packet[3] == 0x05) { 704 hci_drop_link_key_for_bd_addr(&addr); 705 } 706 break; 707 } 708 if (!conn){ 709 conn = create_connection_for_addr(addr); 710 } 711 if (!conn){ 712 // no memory 713 break; 714 } 715 716 conn->state = OPEN; 717 conn->con_handle = READ_BT_16(packet, 4); 718 719 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 720 721 // restart timer 722 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 723 // run_loop_add_timer(&conn->timeout); 724 725 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 726 727 hci_emit_nr_connections_changed(); 728 break; 729 730 // printf("LE buffer size: %u, count %u\n", READ_BT_16(packet,6), packet[8]); 731 732 default: 733 break; 734 } 735 break; 736 #endif 737 738 default: 739 break; 740 } 741 742 // handle BT initialization 743 if (hci_stack.state == HCI_STATE_INITIALIZING){ 744 // handle H4 synchronization loss on restart 745 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 746 // hci_stack.substate = 0; 747 // } 748 // handle normal init sequence 749 if (hci_stack.substate % 2){ 750 // odd: waiting for event 751 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 752 hci_stack.substate++; 753 } 754 } 755 } 756 757 // help with BT sleep 758 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 759 && hci_stack.substate == 1 760 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 761 hci_stack.substate++; 762 } 763 764 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 765 766 // execute main loop 767 hci_run(); 768 } 769 770 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 771 switch (packet_type) { 772 case HCI_EVENT_PACKET: 773 event_handler(packet, size); 774 break; 775 case HCI_ACL_DATA_PACKET: 776 acl_handler(packet, size); 777 break; 778 default: 779 break; 780 } 781 } 782 783 /** Register HCI packet handlers */ 784 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 785 hci_stack.packet_handler = handler; 786 } 787 788 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 789 790 // reference to use transport layer implementation 791 hci_stack.hci_transport = transport; 792 793 // references to used control implementation 794 hci_stack.control = control; 795 796 // reference to used config 797 hci_stack.config = config; 798 799 // no connections yet 800 hci_stack.connections = NULL; 801 hci_stack.discoverable = 0; 802 hci_stack.connectable = 0; 803 804 // no pending cmds 805 hci_stack.decline_reason = 0; 806 hci_stack.new_scan_enable_value = 0xff; 807 808 // higher level handler 809 hci_stack.packet_handler = dummy_handler; 810 811 // store and open remote device db 812 hci_stack.remote_device_db = remote_device_db; 813 if (hci_stack.remote_device_db) { 814 hci_stack.remote_device_db->open(); 815 } 816 817 // max acl payload size defined in config.h 818 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 819 820 // register packet handlers with transport 821 transport->register_packet_handler(&packet_handler); 822 823 hci_stack.state = HCI_STATE_OFF; 824 825 // class of device 826 hci_stack.class_of_device = 0x007a020c; // Smartphone 827 828 // Secure Simple Pairing 829 hci_stack.ssp_enable = 0; 830 hci_stack.ssp_io_capability = SSP_IO_CAPABILITY_UNKNOWN; 831 hci_stack.ssp_authentication_requirement = 0; 832 } 833 834 void hci_close(){ 835 // close remote device db 836 if (hci_stack.remote_device_db) { 837 hci_stack.remote_device_db->close(); 838 } 839 while (hci_stack.connections) { 840 hci_shutdown_connection((hci_connection_t *) hci_stack.connections); 841 } 842 hci_power_control(HCI_POWER_OFF); 843 } 844 845 // State-Module-Driver overview 846 // state module low-level 847 // HCI_STATE_OFF off close 848 // HCI_STATE_INITIALIZING, on open 849 // HCI_STATE_WORKING, on open 850 // HCI_STATE_HALTING, on open 851 // HCI_STATE_SLEEPING, off/sleep close 852 // HCI_STATE_FALLING_ASLEEP on open 853 854 static int hci_power_control_on(void){ 855 856 // power on 857 int err = 0; 858 if (hci_stack.control && hci_stack.control->on){ 859 err = (*hci_stack.control->on)(hci_stack.config); 860 } 861 if (err){ 862 log_error( "POWER_ON failed\n"); 863 hci_emit_hci_open_failed(); 864 return err; 865 } 866 867 // open low-level device 868 err = hci_stack.hci_transport->open(hci_stack.config); 869 if (err){ 870 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 871 if (hci_stack.control && hci_stack.control->off){ 872 (*hci_stack.control->off)(hci_stack.config); 873 } 874 hci_emit_hci_open_failed(); 875 return err; 876 } 877 return 0; 878 } 879 880 static void hci_power_control_off(void){ 881 882 log_info("hci_power_control_off\n"); 883 884 // close low-level device 885 hci_stack.hci_transport->close(hci_stack.config); 886 887 log_info("hci_power_control_off - hci_transport closed\n"); 888 889 // power off 890 if (hci_stack.control && hci_stack.control->off){ 891 (*hci_stack.control->off)(hci_stack.config); 892 } 893 894 log_info("hci_power_control_off - control closed\n"); 895 896 hci_stack.state = HCI_STATE_OFF; 897 } 898 899 static void hci_power_control_sleep(void){ 900 901 log_info("hci_power_control_sleep\n"); 902 903 #if 0 904 // don't close serial port during sleep 905 906 // close low-level device 907 hci_stack.hci_transport->close(hci_stack.config); 908 #endif 909 910 // sleep mode 911 if (hci_stack.control && hci_stack.control->sleep){ 912 (*hci_stack.control->sleep)(hci_stack.config); 913 } 914 915 hci_stack.state = HCI_STATE_SLEEPING; 916 } 917 918 static int hci_power_control_wake(void){ 919 920 log_info("hci_power_control_wake\n"); 921 922 // wake on 923 if (hci_stack.control && hci_stack.control->wake){ 924 (*hci_stack.control->wake)(hci_stack.config); 925 } 926 927 #if 0 928 // open low-level device 929 int err = hci_stack.hci_transport->open(hci_stack.config); 930 if (err){ 931 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 932 if (hci_stack.control && hci_stack.control->off){ 933 (*hci_stack.control->off)(hci_stack.config); 934 } 935 hci_emit_hci_open_failed(); 936 return err; 937 } 938 #endif 939 940 return 0; 941 } 942 943 944 int hci_power_control(HCI_POWER_MODE power_mode){ 945 946 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 947 948 int err = 0; 949 switch (hci_stack.state){ 950 951 case HCI_STATE_OFF: 952 switch (power_mode){ 953 case HCI_POWER_ON: 954 err = hci_power_control_on(); 955 if (err) return err; 956 // set up state machine 957 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 958 hci_stack.state = HCI_STATE_INITIALIZING; 959 hci_stack.substate = 0; 960 break; 961 case HCI_POWER_OFF: 962 // do nothing 963 break; 964 case HCI_POWER_SLEEP: 965 // do nothing (with SLEEP == OFF) 966 break; 967 } 968 break; 969 970 case HCI_STATE_INITIALIZING: 971 switch (power_mode){ 972 case HCI_POWER_ON: 973 // do nothing 974 break; 975 case HCI_POWER_OFF: 976 // no connections yet, just turn it off 977 hci_power_control_off(); 978 break; 979 case HCI_POWER_SLEEP: 980 // no connections yet, just turn it off 981 hci_power_control_sleep(); 982 break; 983 } 984 break; 985 986 case HCI_STATE_WORKING: 987 switch (power_mode){ 988 case HCI_POWER_ON: 989 // do nothing 990 break; 991 case HCI_POWER_OFF: 992 // see hci_run 993 hci_stack.state = HCI_STATE_HALTING; 994 break; 995 case HCI_POWER_SLEEP: 996 // see hci_run 997 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 998 hci_stack.substate = 0; 999 break; 1000 } 1001 break; 1002 1003 case HCI_STATE_HALTING: 1004 switch (power_mode){ 1005 case HCI_POWER_ON: 1006 // set up state machine 1007 hci_stack.state = HCI_STATE_INITIALIZING; 1008 hci_stack.substate = 0; 1009 break; 1010 case HCI_POWER_OFF: 1011 // do nothing 1012 break; 1013 case HCI_POWER_SLEEP: 1014 // see hci_run 1015 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 1016 hci_stack.substate = 0; 1017 break; 1018 } 1019 break; 1020 1021 case HCI_STATE_FALLING_ASLEEP: 1022 switch (power_mode){ 1023 case HCI_POWER_ON: 1024 1025 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1026 // nothing to do, if H4 supports power management 1027 if (bt_control_iphone_power_management_enabled()){ 1028 hci_stack.state = HCI_STATE_INITIALIZING; 1029 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1030 break; 1031 } 1032 #endif 1033 // set up state machine 1034 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1035 hci_stack.state = HCI_STATE_INITIALIZING; 1036 hci_stack.substate = 0; 1037 break; 1038 case HCI_POWER_OFF: 1039 // see hci_run 1040 hci_stack.state = HCI_STATE_HALTING; 1041 break; 1042 case HCI_POWER_SLEEP: 1043 // do nothing 1044 break; 1045 } 1046 break; 1047 1048 case HCI_STATE_SLEEPING: 1049 switch (power_mode){ 1050 case HCI_POWER_ON: 1051 1052 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1053 // nothing to do, if H4 supports power management 1054 if (bt_control_iphone_power_management_enabled()){ 1055 hci_stack.state = HCI_STATE_INITIALIZING; 1056 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1057 hci_update_scan_enable(); 1058 break; 1059 } 1060 #endif 1061 err = hci_power_control_wake(); 1062 if (err) return err; 1063 // set up state machine 1064 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1065 hci_stack.state = HCI_STATE_INITIALIZING; 1066 hci_stack.substate = 0; 1067 break; 1068 case HCI_POWER_OFF: 1069 hci_stack.state = HCI_STATE_HALTING; 1070 break; 1071 case HCI_POWER_SLEEP: 1072 // do nothing 1073 break; 1074 } 1075 break; 1076 } 1077 1078 // create internal event 1079 hci_emit_state(); 1080 1081 // trigger next/first action 1082 hci_run(); 1083 1084 return 0; 1085 } 1086 1087 static void hci_update_scan_enable(void){ 1088 // 2 = page scan, 1 = inq scan 1089 hci_stack.new_scan_enable_value = hci_stack.connectable << 1 | hci_stack.discoverable; 1090 hci_run(); 1091 } 1092 1093 void hci_discoverable_control(uint8_t enable){ 1094 if (enable) enable = 1; // normalize argument 1095 1096 if (hci_stack.discoverable == enable){ 1097 hci_emit_discoverable_enabled(hci_stack.discoverable); 1098 return; 1099 } 1100 1101 hci_stack.discoverable = enable; 1102 hci_update_scan_enable(); 1103 } 1104 1105 void hci_connectable_control(uint8_t enable){ 1106 if (enable) enable = 1; // normalize argument 1107 1108 // don't emit event 1109 if (hci_stack.connectable == enable) return; 1110 1111 hci_stack.connectable = enable; 1112 hci_update_scan_enable(); 1113 } 1114 1115 void hci_run(){ 1116 1117 hci_connection_t * connection; 1118 linked_item_t * it; 1119 1120 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1121 1122 // global/non-connection oriented commands 1123 1124 // decline incoming connections 1125 if (hci_stack.decline_reason){ 1126 uint8_t reason = hci_stack.decline_reason; 1127 hci_stack.decline_reason = 0; 1128 hci_send_cmd(&hci_reject_connection_request, hci_stack.decline_addr, reason); 1129 return; 1130 } 1131 1132 // send scan enable 1133 if (hci_stack.state == HCI_STATE_WORKING && hci_stack.new_scan_enable_value != 0xff && hci_classic_supported()){ 1134 hci_send_cmd(&hci_write_scan_enable, hci_stack.new_scan_enable_value); 1135 hci_stack.new_scan_enable_value = 0xff; 1136 return; 1137 } 1138 1139 // send pending HCI commands 1140 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 1141 1142 connection = (hci_connection_t *) it; 1143 1144 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 1145 log_info("sending hci_accept_connection_request\n"); 1146 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1147 connection->state = ACCEPTED_CONNECTION_REQUEST; 1148 return; 1149 } 1150 1151 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1152 link_key_t link_key; 1153 log_info("responding to link key request\n"); 1154 if ( hci_stack.remote_device_db->get_link_key( &connection->address, &link_key)){ 1155 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1156 } else { 1157 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1158 } 1159 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1160 return; 1161 } 1162 1163 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1164 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack.ssp_io_capability, NULL, hci_stack.ssp_authentication_requirement); 1165 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1166 return; 1167 } 1168 1169 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1170 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1171 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1172 return; 1173 } 1174 1175 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1176 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1177 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1178 return; 1179 } 1180 } 1181 1182 switch (hci_stack.state){ 1183 case HCI_STATE_INITIALIZING: 1184 // log_info("hci_init: substate %u\n", hci_stack.substate); 1185 if (hci_stack.substate % 2) { 1186 // odd: waiting for command completion 1187 return; 1188 } 1189 switch (hci_stack.substate >> 1){ 1190 case 0: // RESET 1191 hci_send_cmd(&hci_reset); 1192 1193 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 1194 // skip baud change 1195 hci_stack.substate = 4; // >> 1 = 2 1196 } 1197 break; 1198 case 1: // SEND BAUD CHANGE 1199 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_packet_buffer); 1200 hci_send_cmd_packet(hci_stack.hci_packet_buffer, 3 + hci_stack.hci_packet_buffer[2]); 1201 break; 1202 case 2: // LOCAL BAUD CHANGE 1203 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 1204 hci_stack.substate += 2; 1205 // break missing here for fall through 1206 1207 case 3: 1208 // Custom initialization 1209 if (hci_stack.control && hci_stack.control->next_cmd){ 1210 int valid_cmd = (*hci_stack.control->next_cmd)(hci_stack.config, hci_stack.hci_packet_buffer); 1211 if (valid_cmd){ 1212 int size = 3 + hci_stack.hci_packet_buffer[2]; 1213 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack.hci_packet_buffer, size); 1214 hci_stack.substate = 4; // more init commands 1215 break; 1216 } 1217 log_info("hci_run: init script done\n\r"); 1218 } 1219 // otherwise continue 1220 hci_send_cmd(&hci_read_bd_addr); 1221 break; 1222 case 4: 1223 hci_send_cmd(&hci_read_buffer_size); 1224 break; 1225 case 5: 1226 hci_send_cmd(&hci_read_local_supported_features); 1227 break; 1228 case 6: 1229 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0xFFFFFFFF); ///0x1DFFFFFF 1230 1231 // skip Classic init commands for LE only chipsets 1232 if (!hci_classic_supported()){ 1233 if (hci_le_supported()){ 1234 hci_stack.substate = 11 << 1; // skip all classic command 1235 } else { 1236 log_error("Neither BR/EDR nor LE supported"); 1237 hci_stack.substate = 13 << 1; 1238 } 1239 } 1240 break; 1241 case 7: 1242 if (hci_ssp_supported()){ 1243 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack.ssp_enable); 1244 break; 1245 } 1246 hci_stack.substate += 2; 1247 // break missing here for fall through 1248 1249 case 8: 1250 // ca. 15 sec 1251 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1252 break; 1253 case 9: 1254 hci_send_cmd(&hci_write_class_of_device, hci_stack.class_of_device); 1255 break; 1256 case 10: 1257 if (hci_stack.local_name){ 1258 hci_send_cmd(&hci_write_local_name, hci_stack.local_name); 1259 } else { 1260 char hostname[30]; 1261 #ifdef EMBEDDED 1262 // BTstack-11:22:33:44:55:66 1263 strcpy(hostname, "BTstack "); 1264 strcat(hostname, bd_addr_to_str(hci_stack.local_bd_addr)); 1265 printf("---> Name %s\n", hostname); 1266 #else 1267 // hostname for POSIX systems 1268 gethostname(hostname, 30); 1269 hostname[29] = '\0'; 1270 #endif 1271 hci_send_cmd(&hci_write_local_name, hostname); 1272 } 1273 break; 1274 case 11: 1275 hci_send_cmd(&hci_write_scan_enable, (hci_stack.connectable << 1) | hci_stack.discoverable); // page scan 1276 if (!hci_le_supported()){ 1277 // SKIP LE init for Classic only configuration 1278 hci_stack.substate = 13 << 1; 1279 } 1280 break; 1281 1282 #ifdef HAVE_BLE 1283 // LE INIT 1284 case 12: 1285 hci_send_cmd(&hci_le_read_buffer_size); 1286 break; 1287 case 13: 1288 // LE Supported Host = 1, Simultaneous Host = 0 1289 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1290 break; 1291 #endif 1292 1293 // DONE 1294 case 14: 1295 // done. 1296 hci_stack.state = HCI_STATE_WORKING; 1297 hci_emit_state(); 1298 break; 1299 default: 1300 break; 1301 } 1302 hci_stack.substate++; 1303 break; 1304 1305 case HCI_STATE_HALTING: 1306 1307 log_info("HCI_STATE_HALTING\n"); 1308 // close all open connections 1309 connection = (hci_connection_t *) hci_stack.connections; 1310 if (connection){ 1311 1312 // send disconnect 1313 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1314 1315 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1316 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1317 1318 // send disconnected event right away - causes higher layer connections to get closed, too. 1319 hci_shutdown_connection(connection); 1320 return; 1321 } 1322 log_info("HCI_STATE_HALTING, calling off\n"); 1323 1324 // switch mode 1325 hci_power_control_off(); 1326 1327 log_info("HCI_STATE_HALTING, emitting state\n"); 1328 hci_emit_state(); 1329 log_info("HCI_STATE_HALTING, done\n"); 1330 break; 1331 1332 case HCI_STATE_FALLING_ASLEEP: 1333 switch(hci_stack.substate) { 1334 case 0: 1335 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1336 // close all open connections 1337 connection = (hci_connection_t *) hci_stack.connections; 1338 1339 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1340 // don't close connections, if H4 supports power management 1341 if (bt_control_iphone_power_management_enabled()){ 1342 connection = NULL; 1343 } 1344 #endif 1345 if (connection){ 1346 1347 // send disconnect 1348 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1349 1350 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1351 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1352 1353 // send disconnected event right away - causes higher layer connections to get closed, too. 1354 hci_shutdown_connection(connection); 1355 return; 1356 } 1357 1358 if (hci_classic_supported()){ 1359 // disable page and inquiry scan 1360 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1361 1362 log_info("HCI_STATE_HALTING, disabling inq scans\n"); 1363 hci_send_cmd(&hci_write_scan_enable, hci_stack.connectable << 1); // drop inquiry scan but keep page scan 1364 1365 // continue in next sub state 1366 hci_stack.substate++; 1367 break; 1368 } 1369 // fall through for ble-only chips 1370 1371 case 2: 1372 log_info("HCI_STATE_HALTING, calling sleep\n"); 1373 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1374 // don't actually go to sleep, if H4 supports power management 1375 if (bt_control_iphone_power_management_enabled()){ 1376 // SLEEP MODE reached 1377 hci_stack.state = HCI_STATE_SLEEPING; 1378 hci_emit_state(); 1379 break; 1380 } 1381 #endif 1382 // switch mode 1383 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1384 hci_emit_state(); 1385 break; 1386 1387 default: 1388 break; 1389 } 1390 break; 1391 1392 default: 1393 break; 1394 } 1395 } 1396 1397 int hci_send_cmd_packet(uint8_t *packet, int size){ 1398 bd_addr_t addr; 1399 hci_connection_t * conn; 1400 // house-keeping 1401 1402 // create_connection? 1403 if (IS_COMMAND(packet, hci_create_connection)){ 1404 bt_flip_addr(addr, &packet[3]); 1405 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1406 conn = connection_for_address(addr); 1407 if (conn) { 1408 // if connection exists 1409 if (conn->state == OPEN) { 1410 // and OPEN, emit connection complete command 1411 hci_emit_connection_complete(conn, 0); 1412 } 1413 // otherwise, just ignore as it is already in the open process 1414 return 0; // don't sent packet to controller 1415 1416 } 1417 // create connection struct and register, state = SENT_CREATE_CONNECTION 1418 conn = create_connection_for_addr(addr); 1419 if (!conn){ 1420 // notify client that alloc failed 1421 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1422 return 0; // don't sent packet to controller 1423 } 1424 conn->state = SENT_CREATE_CONNECTION; 1425 } 1426 1427 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1428 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1429 } 1430 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1431 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1432 } 1433 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1434 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1435 } 1436 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1437 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 1438 } 1439 1440 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1441 if (hci_stack.remote_device_db){ 1442 bt_flip_addr(addr, &packet[3]); 1443 hci_stack.remote_device_db->delete_link_key(&addr); 1444 } 1445 } 1446 1447 hci_stack.num_cmd_packets--; 1448 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1449 } 1450 1451 // Configure Secure Simple Pairing 1452 1453 // enable will enable SSP during init 1454 void hci_ssp_set_enable(int enable){ 1455 hci_stack.ssp_enable = enable; 1456 } 1457 1458 // if set, BTstack will respond to io capability request using authentication requirement 1459 void hci_ssp_set_io_capability(int io_capability){ 1460 hci_stack.ssp_io_capability = io_capability; 1461 } 1462 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 1463 hci_stack.ssp_authentication_requirement = authentication_requirement; 1464 } 1465 1466 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 1467 void hci_ssp_set_auto_accept(int auto_accept){ 1468 hci_stack.ssp_auto_accept = auto_accept; 1469 } 1470 1471 /** 1472 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1473 */ 1474 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1475 va_list argptr; 1476 va_start(argptr, cmd); 1477 uint16_t size = hci_create_cmd_internal(hci_stack.hci_packet_buffer, cmd, argptr); 1478 va_end(argptr); 1479 return hci_send_cmd_packet(hci_stack.hci_packet_buffer, size); 1480 } 1481 1482 // Create various non-HCI events. 1483 // TODO: generalize, use table similar to hci_create_command 1484 1485 void hci_emit_state(){ 1486 log_info("BTSTACK_EVENT_STATE %u", hci_stack.state); 1487 uint8_t event[3]; 1488 event[0] = BTSTACK_EVENT_STATE; 1489 event[1] = sizeof(event) - 2; 1490 event[2] = hci_stack.state; 1491 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1492 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1493 } 1494 1495 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1496 uint8_t event[13]; 1497 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1498 event[1] = sizeof(event) - 2; 1499 event[2] = status; 1500 bt_store_16(event, 3, conn->con_handle); 1501 bt_flip_addr(&event[5], conn->address); 1502 event[11] = 1; // ACL connection 1503 event[12] = 0; // encryption disabled 1504 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1505 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1506 } 1507 1508 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1509 uint8_t event[6]; 1510 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1511 event[1] = sizeof(event) - 2; 1512 event[2] = 0; // status = OK 1513 bt_store_16(event, 3, handle); 1514 event[5] = reason; 1515 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1516 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1517 } 1518 1519 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1520 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 1521 uint8_t event[4]; 1522 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1523 event[1] = sizeof(event) - 2; 1524 bt_store_16(event, 2, conn->con_handle); 1525 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1526 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1527 } 1528 1529 void hci_emit_nr_connections_changed(){ 1530 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 1531 uint8_t event[3]; 1532 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1533 event[1] = sizeof(event) - 2; 1534 event[2] = nr_hci_connections(); 1535 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1536 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1537 } 1538 1539 void hci_emit_hci_open_failed(){ 1540 log_info("BTSTACK_EVENT_POWERON_FAILED"); 1541 uint8_t event[2]; 1542 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1543 event[1] = sizeof(event) - 2; 1544 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1545 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1546 } 1547 1548 #ifndef EMBEDDED 1549 void hci_emit_btstack_version() { 1550 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 1551 uint8_t event[6]; 1552 event[0] = BTSTACK_EVENT_VERSION; 1553 event[1] = sizeof(event) - 2; 1554 event[2] = BTSTACK_MAJOR; 1555 event[3] = BTSTACK_MINOR; 1556 bt_store_16(event, 4, BTSTACK_REVISION); 1557 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1558 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1559 } 1560 #endif 1561 1562 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1563 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 1564 uint8_t event[3]; 1565 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1566 event[1] = sizeof(event) - 2; 1567 event[2] = enabled; 1568 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1569 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1570 } 1571 1572 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1573 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 1574 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1575 event[1] = sizeof(event) - 2 - 1; 1576 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1577 bt_flip_addr(&event[3], *addr); 1578 memcpy(&event[9], name, 248); 1579 1580 event[9+248] = 0; // assert \0 for log_info 1581 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 1582 1583 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 1584 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 1585 } 1586 1587 void hci_emit_discoverable_enabled(uint8_t enabled){ 1588 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 1589 uint8_t event[3]; 1590 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1591 event[1] = sizeof(event) - 2; 1592 event[2] = enabled; 1593 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1594 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1595 } 1596