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