1 /* 2 * Copyright (C) 2009-2012 by Matthias Ringwald 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at [email protected] 34 * 35 */ 36 37 /* 38 * hci.c 39 * 40 * Created by Matthias Ringwald on 4/29/09. 41 * 42 */ 43 44 #include "config.h" 45 46 #include "hci.h" 47 #include "gap.h" 48 49 #include <stdarg.h> 50 #include <string.h> 51 #include <stdio.h> 52 53 #ifndef EMBEDDED 54 #include <unistd.h> // gethostbyname 55 #include <btstack/version.h> 56 #endif 57 58 #include "btstack_memory.h" 59 #include "debug.h" 60 #include "hci_dump.h" 61 62 #include <btstack/hci_cmds.h> 63 64 #define HCI_CONNECTION_TIMEOUT_MS 10000 65 66 #define HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP 11 67 68 #ifdef USE_BLUETOOL 69 #include "bt_control_iphone.h" 70 #endif 71 72 static void hci_update_scan_enable(void); 73 74 // the STACK is here 75 static hci_stack_t hci_stack; 76 77 /** 78 * get connection for a given handle 79 * 80 * @return connection OR NULL, if not found 81 */ 82 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 83 linked_item_t *it; 84 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 85 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 86 return (hci_connection_t *) it; 87 } 88 } 89 return NULL; 90 } 91 92 static void hci_connection_timeout_handler(timer_source_t *timer){ 93 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 94 #ifdef HAVE_TIME 95 struct timeval tv; 96 gettimeofday(&tv, NULL); 97 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 98 // connections might be timed out 99 hci_emit_l2cap_check_timeout(connection); 100 } 101 #endif 102 #ifdef HAVE_TICK 103 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 104 // connections might be timed out 105 hci_emit_l2cap_check_timeout(connection); 106 } 107 #endif 108 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 109 run_loop_add_timer(timer); 110 } 111 112 static void hci_connection_timestamp(hci_connection_t *connection){ 113 #ifdef HAVE_TIME 114 gettimeofday(&connection->timestamp, NULL); 115 #endif 116 #ifdef HAVE_TICK 117 connection->timestamp = embedded_get_ticks(); 118 #endif 119 } 120 121 /** 122 * create connection for given address 123 * 124 * @return connection OR NULL, if no memory left 125 */ 126 static hci_connection_t * create_connection_for_addr(bd_addr_t addr){ 127 hci_connection_t * conn = (hci_connection_t *) btstack_memory_hci_connection_get(); 128 if (!conn) return NULL; 129 BD_ADDR_COPY(conn->address, addr); 130 conn->con_handle = 0xffff; 131 conn->authentication_flags = AUTH_FLAGS_NONE; 132 linked_item_set_user(&conn->timeout.item, conn); 133 conn->timeout.process = hci_connection_timeout_handler; 134 hci_connection_timestamp(conn); 135 conn->acl_recombination_length = 0; 136 conn->acl_recombination_pos = 0; 137 conn->num_acl_packets_sent = 0; 138 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 139 return conn; 140 } 141 142 /** 143 * get connection for given address 144 * 145 * @return connection OR NULL, if not found 146 */ 147 static hci_connection_t * connection_for_address(bd_addr_t address){ 148 linked_item_t *it; 149 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 150 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 151 return (hci_connection_t *) it; 152 } 153 } 154 return NULL; 155 } 156 157 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 158 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 159 } 160 161 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 162 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 163 } 164 165 166 /** 167 * add authentication flags and reset timer 168 */ 169 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 170 bd_addr_t addr; 171 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 172 hci_connection_t * conn = connection_for_address(addr); 173 if (conn) { 174 connectionSetAuthenticationFlags(conn, flags); 175 hci_connection_timestamp(conn); 176 } 177 } 178 179 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 180 hci_connection_t * conn = hci_connection_for_handle(handle); 181 if (!conn) return 0; 182 if (!conn->authentication_flags) return 0; 183 if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0; 184 if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0; 185 return 1; 186 } 187 188 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 189 if (hci_stack.remote_device_db) { 190 hci_stack.remote_device_db->delete_link_key(addr); 191 } 192 } 193 194 195 /** 196 * count connections 197 */ 198 static int nr_hci_connections(void){ 199 int count = 0; 200 linked_item_t *it; 201 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 202 return count; 203 } 204 205 /** 206 * Dummy handler called by HCI 207 */ 208 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 209 } 210 211 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 212 hci_connection_t * connection = hci_connection_for_handle(handle); 213 if (!connection) { 214 log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 215 return 0; 216 } 217 return connection->num_acl_packets_sent; 218 } 219 220 uint8_t hci_number_free_acl_slots(){ 221 uint8_t free_slots = hci_stack.total_num_acl_packets; 222 linked_item_t *it; 223 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 224 hci_connection_t * connection = (hci_connection_t *) it; 225 if (free_slots < connection->num_acl_packets_sent) { 226 log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 227 return 0; 228 } 229 free_slots -= connection->num_acl_packets_sent; 230 } 231 return free_slots; 232 } 233 234 int hci_can_send_packet_now(uint8_t packet_type){ 235 236 // check for async hci transport implementations 237 if (hci_stack.hci_transport->can_send_packet_now){ 238 if (!hci_stack.hci_transport->can_send_packet_now(packet_type)){ 239 return 0; 240 } 241 } 242 243 // check regular Bluetooth flow control 244 switch (packet_type) { 245 case HCI_ACL_DATA_PACKET: 246 return hci_number_free_acl_slots(); 247 case HCI_COMMAND_DATA_PACKET: 248 return hci_stack.num_cmd_packets; 249 default: 250 return 0; 251 } 252 } 253 254 int hci_send_acl_packet(uint8_t *packet, int size){ 255 256 // check for free places on BT module 257 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 258 259 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 260 hci_connection_t *connection = hci_connection_for_handle( con_handle); 261 if (!connection) return 0; 262 hci_connection_timestamp(connection); 263 264 // count packet 265 connection->num_acl_packets_sent++; 266 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 267 268 // send packet 269 int err = hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 270 271 return err; 272 } 273 274 static void acl_handler(uint8_t *packet, int size){ 275 276 // log_info("acl_handler: size %u", size); 277 278 // get info 279 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 280 hci_connection_t *conn = hci_connection_for_handle(con_handle); 281 uint8_t acl_flags = READ_ACL_FLAGS(packet); 282 uint16_t acl_length = READ_ACL_LENGTH(packet); 283 284 // ignore non-registered handle 285 if (!conn){ 286 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 287 return; 288 } 289 290 // assert packet is complete 291 if (acl_length + 4 != size){ 292 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 293 return; 294 } 295 296 // update idle timestamp 297 hci_connection_timestamp(conn); 298 299 // handle different packet types 300 switch (acl_flags & 0x03) { 301 302 case 0x01: // continuation fragment 303 304 // sanity check 305 if (conn->acl_recombination_pos == 0) { 306 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 307 return; 308 } 309 310 // append fragment payload (header already stored) 311 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 312 conn->acl_recombination_pos += acl_length; 313 314 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 315 // conn->acl_recombination_pos, conn->acl_recombination_length); 316 317 // forward complete L2CAP packet if complete. 318 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 319 320 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 321 // reset recombination buffer 322 conn->acl_recombination_length = 0; 323 conn->acl_recombination_pos = 0; 324 } 325 break; 326 327 case 0x02: { // first fragment 328 329 // sanity check 330 if (conn->acl_recombination_pos) { 331 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 332 return; 333 } 334 335 // peek into L2CAP packet! 336 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 337 338 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 339 340 // compare fragment size to L2CAP packet size 341 if (acl_length >= l2cap_length + 4){ 342 343 // forward fragment as L2CAP packet 344 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 345 346 } else { 347 // store first fragment and tweak acl length for complete package 348 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 349 conn->acl_recombination_pos = acl_length + 4; 350 conn->acl_recombination_length = l2cap_length; 351 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 352 } 353 break; 354 355 } 356 default: 357 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 358 return; 359 } 360 361 // execute main loop 362 hci_run(); 363 } 364 365 static void hci_shutdown_connection(hci_connection_t *conn){ 366 log_info("Connection closed: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 367 368 // cancel all l2cap connections 369 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 370 371 run_loop_remove_timer(&conn->timeout); 372 373 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 374 btstack_memory_hci_connection_free( conn ); 375 376 // now it's gone 377 hci_emit_nr_connections_changed(); 378 } 379 380 static const uint16_t packet_type_sizes[] = { 381 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 382 HCI_ACL_DH1_SIZE, 0, 0, 0, 383 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 384 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 385 }; 386 static const uint8_t packet_type_feature_requirement_bit[] = { 387 0, // 3 slot packets 388 1, // 5 slot packets 389 25, // EDR 2 mpbs 390 26, // EDR 3 mbps 391 39, // 3 slot EDR packts 392 40, // 5 slot EDR packet 393 }; 394 static const uint16_t packet_type_feature_packet_mask[] = { 395 0x0f00, // 3 slot packets 396 0xf000, // 5 slot packets 397 0x1102, // EDR 2 mpbs 398 0x2204, // EDR 3 mbps 399 0x0300, // 3 slot EDR packts 400 0x3000, // 5 slot EDR packet 401 }; 402 403 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 404 // enable packet types based on size 405 uint16_t packet_types = 0; 406 int i; 407 for (i=0;i<16;i++){ 408 if (packet_type_sizes[i] == 0) continue; 409 if (packet_type_sizes[i] <= buffer_size){ 410 packet_types |= 1 << i; 411 } 412 } 413 // disable packet types due to missing local supported features 414 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 415 int bit_idx = packet_type_feature_requirement_bit[i]; 416 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 417 if (feature_set) continue; 418 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 419 packet_types &= ~packet_type_feature_packet_mask[i]; 420 } 421 // flip bits for "may not be used" 422 packet_types ^= 0x3306; 423 return packet_types; 424 } 425 426 uint16_t hci_usable_acl_packet_types(void){ 427 return hci_stack.packet_types; 428 } 429 430 uint8_t* hci_get_outgoing_acl_packet_buffer(void){ 431 // hci packet buffer is >= acl data packet length 432 return hci_stack.hci_packet_buffer; 433 } 434 435 uint16_t hci_max_acl_data_packet_length(void){ 436 return hci_stack.acl_data_packet_length; 437 } 438 439 int hci_ssp_supported(void){ 440 // No 51, byte 6, bit 3 441 return (hci_stack.local_supported_features[6] & (1 << 3)) != 0; 442 } 443 444 int hci_classic_supported(void){ 445 // No 37, byte 4, bit 5, = No BR/EDR Support 446 return (hci_stack.local_supported_features[4] & (1 << 5)) == 0; 447 } 448 449 int hci_le_supported(void){ 450 // No 37, byte 4, bit 6 = LE Supported (Controller) 451 #ifdef HAVE_BLE 452 return (hci_stack.local_supported_features[4] & (1 << 6)) != 0; 453 #else 454 return 0; 455 #endif 456 } 457 458 // get addr type and address used in advertisement packets 459 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t * addr){ 460 *addr_type = hci_stack.adv_addr_type; 461 if (hci_stack.adv_addr_type){ 462 memcpy(addr, hci_stack.adv_address, 6); 463 } else { 464 memcpy(addr, hci_stack.local_bd_addr, 6); 465 } 466 } 467 468 // avoid huge local variables 469 #ifndef EMBEDDED 470 static device_name_t device_name; 471 #endif 472 static void event_handler(uint8_t *packet, int size){ 473 474 uint16_t event_length = packet[1]; 475 476 // assert packet is complete 477 if (size != event_length + 2){ 478 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 479 return; 480 } 481 482 bd_addr_t addr; 483 uint8_t link_type; 484 hci_con_handle_t handle; 485 hci_connection_t * conn; 486 int i; 487 488 // printf("HCI:EVENT:%02x\n", packet[0]); 489 490 switch (packet[0]) { 491 492 case HCI_EVENT_COMMAND_COMPLETE: 493 // get num cmd packets 494 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]); 495 hci_stack.num_cmd_packets = packet[2]; 496 497 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 498 // from offset 5 499 // status 500 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 501 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 502 // ignore: SCO data packet len (8) 503 hci_stack.total_num_acl_packets = packet[9]; 504 // ignore: total num SCO packets 505 if (hci_stack.state == HCI_STATE_INITIALIZING){ 506 // determine usable ACL payload size 507 if (HCI_ACL_PAYLOAD_SIZE < hci_stack.acl_data_packet_length){ 508 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 509 } 510 log_info("hci_read_buffer_size: used size %u, count %u\n", 511 hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 512 } 513 } 514 #ifdef HAVE_BLE 515 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 516 hci_stack.le_data_packet_length = READ_BT_16(packet, 6); 517 hci_stack.total_num_le_packets = packet[8]; 518 log_info("hci_le_read_buffer_size: size %u, count %u\n", hci_stack.le_data_packet_length, hci_stack.total_num_le_packets); 519 } 520 #endif 521 // Dump local address 522 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 523 bt_flip_addr(hci_stack.local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 524 log_info("Local Address, Status: 0x%02x: Addr: %s\n", 525 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack.local_bd_addr)); 526 } 527 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 528 hci_emit_discoverable_enabled(hci_stack.discoverable); 529 } 530 // Note: HCI init checks 531 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 532 memcpy(hci_stack.local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 533 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 534 hci_stack.local_supported_features[0], hci_stack.local_supported_features[1], 535 hci_stack.local_supported_features[2], hci_stack.local_supported_features[3], 536 hci_stack.local_supported_features[4], hci_stack.local_supported_features[5], 537 hci_stack.local_supported_features[6], hci_stack.local_supported_features[7]); 538 539 // determine usable ACL packet types based buffer size and supported features 540 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]); 541 log_info("packet types %04x", hci_stack.packet_types); 542 543 // Classic/LE 544 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 545 } 546 break; 547 548 case HCI_EVENT_COMMAND_STATUS: 549 // get num cmd packets 550 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]); 551 hci_stack.num_cmd_packets = packet[3]; 552 break; 553 554 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 555 for (i=0; i<packet[2];i++){ 556 handle = READ_BT_16(packet, 3 + 2*i); 557 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 558 conn = hci_connection_for_handle(handle); 559 if (!conn){ 560 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 561 continue; 562 } 563 conn->num_acl_packets_sent -= num_packets; 564 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 565 } 566 break; 567 568 case HCI_EVENT_CONNECTION_REQUEST: 569 bt_flip_addr(addr, &packet[2]); 570 // TODO: eval COD 8-10 571 link_type = packet[11]; 572 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 573 if (link_type == 1) { // ACL 574 conn = connection_for_address(addr); 575 if (!conn) { 576 conn = create_connection_for_addr(addr); 577 } 578 if (!conn) { 579 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 580 hci_stack.decline_reason = 0x0d; 581 BD_ADDR_COPY(hci_stack.decline_addr, addr); 582 break; 583 } 584 conn->state = RECEIVED_CONNECTION_REQUEST; 585 hci_run(); 586 } else { 587 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 588 hci_stack.decline_reason = 0x0a; 589 BD_ADDR_COPY(hci_stack.decline_addr, addr); 590 } 591 break; 592 593 case HCI_EVENT_CONNECTION_COMPLETE: 594 // Connection management 595 bt_flip_addr(addr, &packet[5]); 596 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 597 conn = connection_for_address(addr); 598 if (conn) { 599 if (!packet[2]){ 600 conn->state = OPEN; 601 conn->con_handle = READ_BT_16(packet, 3); 602 603 // restart timer 604 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 605 run_loop_add_timer(&conn->timeout); 606 607 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 608 609 hci_emit_nr_connections_changed(); 610 } else { 611 // connection failed, remove entry 612 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 613 btstack_memory_hci_connection_free( conn ); 614 615 // if authentication error, also delete link key 616 if (packet[2] == 0x05) { 617 hci_drop_link_key_for_bd_addr(&addr); 618 } 619 } 620 } 621 break; 622 623 case HCI_EVENT_LINK_KEY_REQUEST: 624 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 625 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 626 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 627 if (hci_stack.bondable && !hci_stack.remote_device_db) break; 628 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 629 hci_run(); 630 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 631 return; 632 633 case HCI_EVENT_LINK_KEY_NOTIFICATION: 634 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 635 if (!hci_stack.remote_device_db) break; 636 bt_flip_addr(addr, &packet[2]); 637 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 638 // still forward event to allow dismiss of pairing dialog 639 break; 640 641 case HCI_EVENT_PIN_CODE_REQUEST: 642 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 643 // non-bondable mode: pin code negative reply will be sent 644 if (!hci_stack.bondable){ 645 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_PIN_CODE_REQUEST); 646 break; 647 } 648 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 649 if (!hci_stack.remote_device_db) break; 650 bt_flip_addr(addr, &packet[2]); 651 hci_stack.remote_device_db->delete_link_key(&addr); 652 break; 653 654 case HCI_EVENT_IO_CAPABILITY_REQUEST: 655 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 656 if (hci_stack.ssp_io_capability == SSP_IO_CAPABILITY_UNKNOWN) break; 657 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 658 break; 659 660 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 661 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_CONFIRM_REQUEST); 662 if (!hci_stack.ssp_auto_accept) break; 663 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 664 break; 665 666 case HCI_EVENT_USER_PASSKEY_REQUEST: 667 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_PASSKEY_REQUEST); 668 if (!hci_stack.ssp_auto_accept) break; 669 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 670 break; 671 672 #ifndef EMBEDDED 673 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 674 if (!hci_stack.remote_device_db) break; 675 if (packet[2]) break; // status not ok 676 bt_flip_addr(addr, &packet[3]); 677 // fix for invalid remote names - terminate on 0xff 678 for (i=0; i<248;i++){ 679 if (packet[9+i] == 0xff){ 680 packet[9+i] = 0; 681 break; 682 } 683 } 684 memset(&device_name, 0, sizeof(device_name_t)); 685 strncpy((char*) device_name, (char*) &packet[9], 248); 686 hci_stack.remote_device_db->put_name(&addr, &device_name); 687 break; 688 689 case HCI_EVENT_INQUIRY_RESULT: 690 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 691 if (!hci_stack.remote_device_db) break; 692 // first send inq result packet 693 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 694 // then send cached remote names 695 for (i=0; i<packet[2];i++){ 696 bt_flip_addr(addr, &packet[3+i*6]); 697 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 698 hci_emit_remote_name_cached(&addr, &device_name); 699 } 700 } 701 return; 702 #endif 703 704 case HCI_EVENT_DISCONNECTION_COMPLETE: 705 if (!packet[2]){ 706 handle = READ_BT_16(packet, 3); 707 hci_connection_t * conn = hci_connection_for_handle(handle); 708 if (conn) { 709 hci_shutdown_connection(conn); 710 } 711 } 712 break; 713 714 case HCI_EVENT_HARDWARE_ERROR: 715 if(hci_stack.control && hci_stack.control->hw_error){ 716 (*hci_stack.control->hw_error)(); 717 } 718 break; 719 720 #ifdef HAVE_BLE 721 case HCI_EVENT_LE_META: 722 switch (packet[2]) { 723 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 724 // Connection management 725 bt_flip_addr(addr, &packet[8]); 726 log_info("LE Connection_complete (status=%u) %s\n", packet[3], bd_addr_to_str(addr)); 727 // LE connections are auto-accepted, so just create a connection if there isn't one already 728 conn = connection_for_address(addr); 729 if (packet[3]){ 730 if (conn){ 731 // outgoing connection failed, remove entry 732 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 733 btstack_memory_hci_connection_free( conn ); 734 735 } 736 // if authentication error, also delete link key 737 if (packet[3] == 0x05) { 738 hci_drop_link_key_for_bd_addr(&addr); 739 } 740 break; 741 } 742 if (!conn){ 743 conn = create_connection_for_addr(addr); 744 } 745 if (!conn){ 746 // no memory 747 break; 748 } 749 750 conn->state = OPEN; 751 conn->con_handle = READ_BT_16(packet, 4); 752 753 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 754 755 // restart timer 756 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 757 // run_loop_add_timer(&conn->timeout); 758 759 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 760 761 hci_emit_nr_connections_changed(); 762 break; 763 764 // printf("LE buffer size: %u, count %u\n", READ_BT_16(packet,6), packet[8]); 765 766 default: 767 break; 768 } 769 break; 770 #endif 771 772 default: 773 break; 774 } 775 776 // handle BT initialization 777 if (hci_stack.state == HCI_STATE_INITIALIZING){ 778 if (hci_stack.substate % 2){ 779 // odd: waiting for event 780 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 781 // wait for explicit COMMAND COMPLETE on RESET 782 if (hci_stack.substate > 1 || COMMAND_COMPLETE_EVENT(packet, hci_reset)) { 783 hci_stack.substate++; 784 } 785 } 786 } 787 } 788 789 // help with BT sleep 790 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 791 && hci_stack.substate == 1 792 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 793 hci_stack.substate++; 794 } 795 796 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 797 798 // execute main loop 799 hci_run(); 800 } 801 802 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 803 switch (packet_type) { 804 case HCI_EVENT_PACKET: 805 event_handler(packet, size); 806 break; 807 case HCI_ACL_DATA_PACKET: 808 acl_handler(packet, size); 809 break; 810 default: 811 break; 812 } 813 } 814 815 /** Register HCI packet handlers */ 816 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 817 hci_stack.packet_handler = handler; 818 } 819 820 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 821 822 // reference to use transport layer implementation 823 hci_stack.hci_transport = transport; 824 825 // references to used control implementation 826 hci_stack.control = control; 827 828 // reference to used config 829 hci_stack.config = config; 830 831 // no connections yet 832 hci_stack.connections = NULL; 833 hci_stack.discoverable = 0; 834 hci_stack.connectable = 0; 835 hci_stack.bondable = 1; 836 837 // no pending cmds 838 hci_stack.decline_reason = 0; 839 hci_stack.new_scan_enable_value = 0xff; 840 841 // higher level handler 842 hci_stack.packet_handler = dummy_handler; 843 844 // store and open remote device db 845 hci_stack.remote_device_db = remote_device_db; 846 if (hci_stack.remote_device_db) { 847 hci_stack.remote_device_db->open(); 848 } 849 850 // max acl payload size defined in config.h 851 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 852 853 // register packet handlers with transport 854 transport->register_packet_handler(&packet_handler); 855 856 hci_stack.state = HCI_STATE_OFF; 857 858 // class of device 859 hci_stack.class_of_device = 0x007a020c; // Smartphone 860 861 // Secure Simple Pairing default: enable, no I/O capabilities, auto accept 862 hci_stack.ssp_enable = 1; 863 hci_stack.ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 864 hci_stack.ssp_authentication_requirement = 0; 865 hci_stack.ssp_auto_accept = 1; 866 867 // LE 868 hci_stack.adv_addr_type = 0; 869 memset(hci_stack.adv_address, 0, 6); 870 } 871 872 void hci_close(){ 873 // close remote device db 874 if (hci_stack.remote_device_db) { 875 hci_stack.remote_device_db->close(); 876 } 877 while (hci_stack.connections) { 878 hci_shutdown_connection((hci_connection_t *) hci_stack.connections); 879 } 880 hci_power_control(HCI_POWER_OFF); 881 } 882 883 // State-Module-Driver overview 884 // state module low-level 885 // HCI_STATE_OFF off close 886 // HCI_STATE_INITIALIZING, on open 887 // HCI_STATE_WORKING, on open 888 // HCI_STATE_HALTING, on open 889 // HCI_STATE_SLEEPING, off/sleep close 890 // HCI_STATE_FALLING_ASLEEP on open 891 892 static int hci_power_control_on(void){ 893 894 // power on 895 int err = 0; 896 if (hci_stack.control && hci_stack.control->on){ 897 err = (*hci_stack.control->on)(hci_stack.config); 898 } 899 if (err){ 900 log_error( "POWER_ON failed\n"); 901 hci_emit_hci_open_failed(); 902 return err; 903 } 904 905 // open low-level device 906 err = hci_stack.hci_transport->open(hci_stack.config); 907 if (err){ 908 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 909 if (hci_stack.control && hci_stack.control->off){ 910 (*hci_stack.control->off)(hci_stack.config); 911 } 912 hci_emit_hci_open_failed(); 913 return err; 914 } 915 return 0; 916 } 917 918 static void hci_power_control_off(void){ 919 920 log_info("hci_power_control_off\n"); 921 922 // close low-level device 923 hci_stack.hci_transport->close(hci_stack.config); 924 925 log_info("hci_power_control_off - hci_transport closed\n"); 926 927 // power off 928 if (hci_stack.control && hci_stack.control->off){ 929 (*hci_stack.control->off)(hci_stack.config); 930 } 931 932 log_info("hci_power_control_off - control closed\n"); 933 934 hci_stack.state = HCI_STATE_OFF; 935 } 936 937 static void hci_power_control_sleep(void){ 938 939 log_info("hci_power_control_sleep\n"); 940 941 #if 0 942 // don't close serial port during sleep 943 944 // close low-level device 945 hci_stack.hci_transport->close(hci_stack.config); 946 #endif 947 948 // sleep mode 949 if (hci_stack.control && hci_stack.control->sleep){ 950 (*hci_stack.control->sleep)(hci_stack.config); 951 } 952 953 hci_stack.state = HCI_STATE_SLEEPING; 954 } 955 956 static int hci_power_control_wake(void){ 957 958 log_info("hci_power_control_wake\n"); 959 960 // wake on 961 if (hci_stack.control && hci_stack.control->wake){ 962 (*hci_stack.control->wake)(hci_stack.config); 963 } 964 965 #if 0 966 // open low-level device 967 int err = hci_stack.hci_transport->open(hci_stack.config); 968 if (err){ 969 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 970 if (hci_stack.control && hci_stack.control->off){ 971 (*hci_stack.control->off)(hci_stack.config); 972 } 973 hci_emit_hci_open_failed(); 974 return err; 975 } 976 #endif 977 978 return 0; 979 } 980 981 982 int hci_power_control(HCI_POWER_MODE power_mode){ 983 984 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 985 986 int err = 0; 987 switch (hci_stack.state){ 988 989 case HCI_STATE_OFF: 990 switch (power_mode){ 991 case HCI_POWER_ON: 992 err = hci_power_control_on(); 993 if (err) return err; 994 // set up state machine 995 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 996 hci_stack.state = HCI_STATE_INITIALIZING; 997 hci_stack.substate = 0; 998 break; 999 case HCI_POWER_OFF: 1000 // do nothing 1001 break; 1002 case HCI_POWER_SLEEP: 1003 // do nothing (with SLEEP == OFF) 1004 break; 1005 } 1006 break; 1007 1008 case HCI_STATE_INITIALIZING: 1009 switch (power_mode){ 1010 case HCI_POWER_ON: 1011 // do nothing 1012 break; 1013 case HCI_POWER_OFF: 1014 // no connections yet, just turn it off 1015 hci_power_control_off(); 1016 break; 1017 case HCI_POWER_SLEEP: 1018 // no connections yet, just turn it off 1019 hci_power_control_sleep(); 1020 break; 1021 } 1022 break; 1023 1024 case HCI_STATE_WORKING: 1025 switch (power_mode){ 1026 case HCI_POWER_ON: 1027 // do nothing 1028 break; 1029 case HCI_POWER_OFF: 1030 // see hci_run 1031 hci_stack.state = HCI_STATE_HALTING; 1032 break; 1033 case HCI_POWER_SLEEP: 1034 // see hci_run 1035 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 1036 hci_stack.substate = 0; 1037 break; 1038 } 1039 break; 1040 1041 case HCI_STATE_HALTING: 1042 switch (power_mode){ 1043 case HCI_POWER_ON: 1044 // set up state machine 1045 hci_stack.state = HCI_STATE_INITIALIZING; 1046 hci_stack.substate = 0; 1047 break; 1048 case HCI_POWER_OFF: 1049 // do nothing 1050 break; 1051 case HCI_POWER_SLEEP: 1052 // see hci_run 1053 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 1054 hci_stack.substate = 0; 1055 break; 1056 } 1057 break; 1058 1059 case HCI_STATE_FALLING_ASLEEP: 1060 switch (power_mode){ 1061 case HCI_POWER_ON: 1062 1063 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1064 // nothing to do, if H4 supports power management 1065 if (bt_control_iphone_power_management_enabled()){ 1066 hci_stack.state = HCI_STATE_INITIALIZING; 1067 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1068 break; 1069 } 1070 #endif 1071 // set up state machine 1072 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1073 hci_stack.state = HCI_STATE_INITIALIZING; 1074 hci_stack.substate = 0; 1075 break; 1076 case HCI_POWER_OFF: 1077 // see hci_run 1078 hci_stack.state = HCI_STATE_HALTING; 1079 break; 1080 case HCI_POWER_SLEEP: 1081 // do nothing 1082 break; 1083 } 1084 break; 1085 1086 case HCI_STATE_SLEEPING: 1087 switch (power_mode){ 1088 case HCI_POWER_ON: 1089 1090 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1091 // nothing to do, if H4 supports power management 1092 if (bt_control_iphone_power_management_enabled()){ 1093 hci_stack.state = HCI_STATE_INITIALIZING; 1094 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1095 hci_update_scan_enable(); 1096 break; 1097 } 1098 #endif 1099 err = hci_power_control_wake(); 1100 if (err) return err; 1101 // set up state machine 1102 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1103 hci_stack.state = HCI_STATE_INITIALIZING; 1104 hci_stack.substate = 0; 1105 break; 1106 case HCI_POWER_OFF: 1107 hci_stack.state = HCI_STATE_HALTING; 1108 break; 1109 case HCI_POWER_SLEEP: 1110 // do nothing 1111 break; 1112 } 1113 break; 1114 } 1115 1116 // create internal event 1117 hci_emit_state(); 1118 1119 // trigger next/first action 1120 hci_run(); 1121 1122 return 0; 1123 } 1124 1125 static void hci_update_scan_enable(void){ 1126 // 2 = page scan, 1 = inq scan 1127 hci_stack.new_scan_enable_value = hci_stack.connectable << 1 | hci_stack.discoverable; 1128 hci_run(); 1129 } 1130 1131 void hci_discoverable_control(uint8_t enable){ 1132 if (enable) enable = 1; // normalize argument 1133 1134 if (hci_stack.discoverable == enable){ 1135 hci_emit_discoverable_enabled(hci_stack.discoverable); 1136 return; 1137 } 1138 1139 hci_stack.discoverable = enable; 1140 hci_update_scan_enable(); 1141 } 1142 1143 void hci_connectable_control(uint8_t enable){ 1144 if (enable) enable = 1; // normalize argument 1145 1146 // don't emit event 1147 if (hci_stack.connectable == enable) return; 1148 1149 hci_stack.connectable = enable; 1150 hci_update_scan_enable(); 1151 } 1152 1153 bd_addr_t * hci_local_bd_addr(void){ 1154 return &hci_stack.local_bd_addr; 1155 } 1156 1157 void hci_run(){ 1158 1159 hci_connection_t * connection; 1160 linked_item_t * it; 1161 1162 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1163 1164 // global/non-connection oriented commands 1165 1166 // decline incoming connections 1167 if (hci_stack.decline_reason){ 1168 uint8_t reason = hci_stack.decline_reason; 1169 hci_stack.decline_reason = 0; 1170 hci_send_cmd(&hci_reject_connection_request, hci_stack.decline_addr, reason); 1171 return; 1172 } 1173 1174 // send scan enable 1175 if (hci_stack.state == HCI_STATE_WORKING && hci_stack.new_scan_enable_value != 0xff && hci_classic_supported()){ 1176 hci_send_cmd(&hci_write_scan_enable, hci_stack.new_scan_enable_value); 1177 hci_stack.new_scan_enable_value = 0xff; 1178 return; 1179 } 1180 1181 // send pending HCI commands 1182 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 1183 1184 connection = (hci_connection_t *) it; 1185 1186 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 1187 log_info("sending hci_accept_connection_request\n"); 1188 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1189 connection->state = ACCEPTED_CONNECTION_REQUEST; 1190 return; 1191 } 1192 1193 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1194 link_key_t link_key; 1195 log_info("responding to link key request\n"); 1196 if ( hci_stack.bondable && hci_stack.remote_device_db && hci_stack.remote_device_db->get_link_key( &connection->address, &link_key)){ 1197 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1198 } else { 1199 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1200 } 1201 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1202 return; 1203 } 1204 1205 if (connection->authentication_flags & HANDLE_PIN_CODE_REQUEST){ 1206 log_info("denying to pin request\n"); 1207 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 1208 connectionClearAuthenticationFlags(connection, HANDLE_PIN_CODE_REQUEST); 1209 return; 1210 } 1211 1212 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1213 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack.ssp_io_capability, NULL, hci_stack.ssp_authentication_requirement); 1214 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1215 return; 1216 } 1217 1218 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1219 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1220 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1221 return; 1222 } 1223 1224 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1225 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1226 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1227 return; 1228 } 1229 } 1230 1231 switch (hci_stack.state){ 1232 case HCI_STATE_INITIALIZING: 1233 // log_info("hci_init: substate %u\n", hci_stack.substate); 1234 if (hci_stack.substate % 2) { 1235 // odd: waiting for command completion 1236 return; 1237 } 1238 switch (hci_stack.substate >> 1){ 1239 case 0: // RESET 1240 hci_send_cmd(&hci_reset); 1241 1242 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 1243 // skip baud change 1244 hci_stack.substate = 4; // >> 1 = 2 1245 } 1246 break; 1247 case 1: // SEND BAUD CHANGE 1248 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_packet_buffer); 1249 hci_send_cmd_packet(hci_stack.hci_packet_buffer, 3 + hci_stack.hci_packet_buffer[2]); 1250 break; 1251 case 2: // LOCAL BAUD CHANGE 1252 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 1253 hci_stack.substate += 2; 1254 // break missing here for fall through 1255 1256 case 3: 1257 // Custom initialization 1258 if (hci_stack.control && hci_stack.control->next_cmd){ 1259 int valid_cmd = (*hci_stack.control->next_cmd)(hci_stack.config, hci_stack.hci_packet_buffer); 1260 if (valid_cmd){ 1261 int size = 3 + hci_stack.hci_packet_buffer[2]; 1262 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack.hci_packet_buffer, size); 1263 hci_stack.substate = 4; // more init commands 1264 break; 1265 } 1266 log_info("hci_run: init script done\n\r"); 1267 } 1268 // otherwise continue 1269 hci_send_cmd(&hci_read_bd_addr); 1270 break; 1271 case 4: 1272 hci_send_cmd(&hci_read_buffer_size); 1273 break; 1274 case 5: 1275 hci_send_cmd(&hci_read_local_supported_features); 1276 break; 1277 case 6: 1278 if (hci_le_supported()){ 1279 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1280 } else { 1281 // Kensington Bluetoot 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1282 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1283 } 1284 1285 // skip Classic init commands for LE only chipsets 1286 if (!hci_classic_supported()){ 1287 if (hci_le_supported()){ 1288 hci_stack.substate = 11 << 1; // skip all classic command 1289 } else { 1290 log_error("Neither BR/EDR nor LE supported"); 1291 hci_stack.substate = 13 << 1; // skip all 1292 } 1293 } 1294 break; 1295 case 7: 1296 if (hci_ssp_supported()){ 1297 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack.ssp_enable); 1298 break; 1299 } 1300 hci_stack.substate += 2; 1301 // break missing here for fall through 1302 1303 case 8: 1304 // ca. 15 sec 1305 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1306 break; 1307 case 9: 1308 hci_send_cmd(&hci_write_class_of_device, hci_stack.class_of_device); 1309 break; 1310 case 10: 1311 if (hci_stack.local_name){ 1312 hci_send_cmd(&hci_write_local_name, hci_stack.local_name); 1313 } else { 1314 char hostname[30]; 1315 #ifdef EMBEDDED 1316 // BTstack-11:22:33:44:55:66 1317 strcpy(hostname, "BTstack "); 1318 strcat(hostname, bd_addr_to_str(hci_stack.local_bd_addr)); 1319 printf("---> Name %s\n", hostname); 1320 #else 1321 // hostname for POSIX systems 1322 gethostname(hostname, 30); 1323 hostname[29] = '\0'; 1324 #endif 1325 hci_send_cmd(&hci_write_local_name, hostname); 1326 } 1327 break; 1328 case 11: 1329 hci_send_cmd(&hci_write_scan_enable, (hci_stack.connectable << 1) | hci_stack.discoverable); // page scan 1330 if (!hci_le_supported()){ 1331 // SKIP LE init for Classic only configuration 1332 hci_stack.substate = 13 << 1; 1333 } 1334 break; 1335 1336 #ifdef HAVE_BLE 1337 // LE INIT 1338 case 12: 1339 hci_send_cmd(&hci_le_read_buffer_size); 1340 break; 1341 case 13: 1342 // LE Supported Host = 1, Simultaneous Host = 0 1343 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1344 break; 1345 #endif 1346 1347 // DONE 1348 case 14: 1349 // done. 1350 hci_stack.state = HCI_STATE_WORKING; 1351 hci_emit_state(); 1352 break; 1353 default: 1354 break; 1355 } 1356 hci_stack.substate++; 1357 break; 1358 1359 case HCI_STATE_HALTING: 1360 1361 log_info("HCI_STATE_HALTING\n"); 1362 // close all open connections 1363 connection = (hci_connection_t *) hci_stack.connections; 1364 if (connection){ 1365 1366 // send disconnect 1367 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1368 1369 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1370 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1371 1372 // send disconnected event right away - causes higher layer connections to get closed, too. 1373 hci_shutdown_connection(connection); 1374 return; 1375 } 1376 log_info("HCI_STATE_HALTING, calling off\n"); 1377 1378 // switch mode 1379 hci_power_control_off(); 1380 1381 log_info("HCI_STATE_HALTING, emitting state\n"); 1382 hci_emit_state(); 1383 log_info("HCI_STATE_HALTING, done\n"); 1384 break; 1385 1386 case HCI_STATE_FALLING_ASLEEP: 1387 switch(hci_stack.substate) { 1388 case 0: 1389 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1390 // close all open connections 1391 connection = (hci_connection_t *) hci_stack.connections; 1392 1393 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1394 // don't close connections, if H4 supports power management 1395 if (bt_control_iphone_power_management_enabled()){ 1396 connection = NULL; 1397 } 1398 #endif 1399 if (connection){ 1400 1401 // send disconnect 1402 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1403 1404 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1405 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1406 1407 // send disconnected event right away - causes higher layer connections to get closed, too. 1408 hci_shutdown_connection(connection); 1409 return; 1410 } 1411 1412 if (hci_classic_supported()){ 1413 // disable page and inquiry scan 1414 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1415 1416 log_info("HCI_STATE_HALTING, disabling inq scans\n"); 1417 hci_send_cmd(&hci_write_scan_enable, hci_stack.connectable << 1); // drop inquiry scan but keep page scan 1418 1419 // continue in next sub state 1420 hci_stack.substate++; 1421 break; 1422 } 1423 // fall through for ble-only chips 1424 1425 case 2: 1426 log_info("HCI_STATE_HALTING, calling sleep\n"); 1427 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1428 // don't actually go to sleep, if H4 supports power management 1429 if (bt_control_iphone_power_management_enabled()){ 1430 // SLEEP MODE reached 1431 hci_stack.state = HCI_STATE_SLEEPING; 1432 hci_emit_state(); 1433 break; 1434 } 1435 #endif 1436 // switch mode 1437 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1438 hci_emit_state(); 1439 break; 1440 1441 default: 1442 break; 1443 } 1444 break; 1445 1446 default: 1447 break; 1448 } 1449 } 1450 1451 int hci_send_cmd_packet(uint8_t *packet, int size){ 1452 bd_addr_t addr; 1453 hci_connection_t * conn; 1454 // house-keeping 1455 1456 // create_connection? 1457 if (IS_COMMAND(packet, hci_create_connection)){ 1458 bt_flip_addr(addr, &packet[3]); 1459 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1460 conn = connection_for_address(addr); 1461 if (conn) { 1462 // if connection exists 1463 if (conn->state == OPEN) { 1464 // and OPEN, emit connection complete command 1465 hci_emit_connection_complete(conn, 0); 1466 } 1467 // otherwise, just ignore as it is already in the open process 1468 return 0; // don't sent packet to controller 1469 1470 } 1471 // create connection struct and register, state = SENT_CREATE_CONNECTION 1472 conn = create_connection_for_addr(addr); 1473 if (!conn){ 1474 // notify client that alloc failed 1475 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1476 return 0; // don't sent packet to controller 1477 } 1478 conn->state = SENT_CREATE_CONNECTION; 1479 } 1480 1481 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1482 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1483 } 1484 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1485 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1486 } 1487 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1488 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1489 } 1490 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1491 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 1492 } 1493 1494 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1495 if (hci_stack.remote_device_db){ 1496 bt_flip_addr(addr, &packet[3]); 1497 hci_stack.remote_device_db->delete_link_key(&addr); 1498 } 1499 } 1500 1501 #ifdef HAVE_BLE 1502 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 1503 hci_stack.adv_addr_type = packet[8]; 1504 } 1505 if (IS_COMMAND(packet, hci_le_set_random_address)){ 1506 bt_flip_addr(hci_stack.adv_address, &packet[3]); 1507 } 1508 #endif 1509 1510 1511 hci_stack.num_cmd_packets--; 1512 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1513 } 1514 1515 // Configure Secure Simple Pairing 1516 1517 // enable will enable SSP during init 1518 void hci_ssp_set_enable(int enable){ 1519 hci_stack.ssp_enable = enable; 1520 } 1521 1522 // if set, BTstack will respond to io capability request using authentication requirement 1523 void hci_ssp_set_io_capability(int io_capability){ 1524 hci_stack.ssp_io_capability = io_capability; 1525 } 1526 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 1527 hci_stack.ssp_authentication_requirement = authentication_requirement; 1528 } 1529 1530 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 1531 void hci_ssp_set_auto_accept(int auto_accept){ 1532 hci_stack.ssp_auto_accept = auto_accept; 1533 } 1534 1535 /** 1536 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1537 */ 1538 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1539 va_list argptr; 1540 va_start(argptr, cmd); 1541 uint16_t size = hci_create_cmd_internal(hci_stack.hci_packet_buffer, cmd, argptr); 1542 va_end(argptr); 1543 return hci_send_cmd_packet(hci_stack.hci_packet_buffer, size); 1544 } 1545 1546 // Create various non-HCI events. 1547 // TODO: generalize, use table similar to hci_create_command 1548 1549 void hci_emit_state(){ 1550 log_info("BTSTACK_EVENT_STATE %u", hci_stack.state); 1551 uint8_t event[3]; 1552 event[0] = BTSTACK_EVENT_STATE; 1553 event[1] = sizeof(event) - 2; 1554 event[2] = hci_stack.state; 1555 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1556 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1557 } 1558 1559 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1560 uint8_t event[13]; 1561 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1562 event[1] = sizeof(event) - 2; 1563 event[2] = status; 1564 bt_store_16(event, 3, conn->con_handle); 1565 bt_flip_addr(&event[5], conn->address); 1566 event[11] = 1; // ACL connection 1567 event[12] = 0; // encryption disabled 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_disconnection_complete(uint16_t handle, uint8_t reason){ 1573 uint8_t event[6]; 1574 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1575 event[1] = sizeof(event) - 2; 1576 event[2] = 0; // status = OK 1577 bt_store_16(event, 3, handle); 1578 event[5] = reason; 1579 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1580 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1581 } 1582 1583 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1584 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 1585 uint8_t event[4]; 1586 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1587 event[1] = sizeof(event) - 2; 1588 bt_store_16(event, 2, conn->con_handle); 1589 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1590 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1591 } 1592 1593 void hci_emit_nr_connections_changed(){ 1594 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 1595 uint8_t event[3]; 1596 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1597 event[1] = sizeof(event) - 2; 1598 event[2] = nr_hci_connections(); 1599 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1600 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1601 } 1602 1603 void hci_emit_hci_open_failed(){ 1604 log_info("BTSTACK_EVENT_POWERON_FAILED"); 1605 uint8_t event[2]; 1606 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1607 event[1] = sizeof(event) - 2; 1608 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1609 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1610 } 1611 1612 #ifndef EMBEDDED 1613 void hci_emit_btstack_version() { 1614 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 1615 uint8_t event[6]; 1616 event[0] = BTSTACK_EVENT_VERSION; 1617 event[1] = sizeof(event) - 2; 1618 event[2] = BTSTACK_MAJOR; 1619 event[3] = BTSTACK_MINOR; 1620 bt_store_16(event, 4, BTSTACK_REVISION); 1621 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1622 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1623 } 1624 #endif 1625 1626 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1627 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 1628 uint8_t event[3]; 1629 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1630 event[1] = sizeof(event) - 2; 1631 event[2] = enabled; 1632 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1633 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1634 } 1635 1636 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1637 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 1638 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1639 event[1] = sizeof(event) - 2 - 1; 1640 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1641 bt_flip_addr(&event[3], *addr); 1642 memcpy(&event[9], name, 248); 1643 1644 event[9+248] = 0; // assert \0 for log_info 1645 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 1646 1647 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 1648 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 1649 } 1650 1651 void hci_emit_discoverable_enabled(uint8_t enabled){ 1652 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 1653 uint8_t event[3]; 1654 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1655 event[1] = sizeof(event) - 2; 1656 event[2] = enabled; 1657 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1658 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1659 } 1660 1661 // GAP API 1662 /** 1663 * @bbrief enable/disable bonding. default is enabled 1664 * @praram enabled 1665 */ 1666 void gap_set_bondable_mode(int enable){ 1667 hci_stack.bondable = enable ? 1 : 0; 1668 } 1669