1 /* 2 * Copyright (C) 2009-2012 by Matthias Ringwald 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at [email protected] 34 * 35 */ 36 37 /* 38 * hci.c 39 * 40 * Created by Matthias Ringwald on 4/29/09. 41 * 42 */ 43 44 #include "config.h" 45 46 #include "hci.h" 47 48 #include <stdarg.h> 49 #include <string.h> 50 #include <stdio.h> 51 52 #ifndef EMBEDDED 53 #include <unistd.h> // gethostbyname 54 #include <btstack/version.h> 55 #endif 56 57 #include "btstack_memory.h" 58 #include "debug.h" 59 #include "hci_dump.h" 60 61 #include <btstack/hci_cmds.h> 62 63 #define HCI_CONNECTION_TIMEOUT_MS 10000 64 65 #define HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP 11 66 67 #ifdef USE_BLUETOOL 68 #include "bt_control_iphone.h" 69 #endif 70 71 static void hci_update_scan_enable(void); 72 73 // the STACK is here 74 static hci_stack_t hci_stack; 75 76 /** 77 * get connection for a given handle 78 * 79 * @return connection OR NULL, if not found 80 */ 81 hci_connection_t * connection_for_handle(hci_con_handle_t con_handle){ 82 linked_item_t *it; 83 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 84 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 85 return (hci_connection_t *) it; 86 } 87 } 88 return NULL; 89 } 90 91 static void hci_connection_timeout_handler(timer_source_t *timer){ 92 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 93 #ifdef HAVE_TIME 94 struct timeval tv; 95 gettimeofday(&tv, NULL); 96 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 97 // connections might be timed out 98 hci_emit_l2cap_check_timeout(connection); 99 } 100 #endif 101 #ifdef HAVE_TICK 102 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 103 // connections might be timed out 104 hci_emit_l2cap_check_timeout(connection); 105 } 106 #endif 107 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 108 run_loop_add_timer(timer); 109 } 110 111 static void hci_connection_timestamp(hci_connection_t *connection){ 112 #ifdef HAVE_TIME 113 gettimeofday(&connection->timestamp, NULL); 114 #endif 115 #ifdef HAVE_TICK 116 connection->timestamp = embedded_get_ticks(); 117 #endif 118 } 119 120 /** 121 * create connection for given address 122 * 123 * @return connection OR NULL, if no memory left 124 */ 125 static hci_connection_t * create_connection_for_addr(bd_addr_t addr){ 126 hci_connection_t * conn = (hci_connection_t *) btstack_memory_hci_connection_get(); 127 if (!conn) return NULL; 128 BD_ADDR_COPY(conn->address, addr); 129 conn->con_handle = 0xffff; 130 conn->authentication_flags = AUTH_FLAGS_NONE; 131 linked_item_set_user(&conn->timeout.item, conn); 132 conn->timeout.process = hci_connection_timeout_handler; 133 hci_connection_timestamp(conn); 134 conn->acl_recombination_length = 0; 135 conn->acl_recombination_pos = 0; 136 conn->num_acl_packets_sent = 0; 137 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 138 return conn; 139 } 140 141 /** 142 * get connection for given address 143 * 144 * @return connection OR NULL, if not found 145 */ 146 static hci_connection_t * connection_for_address(bd_addr_t address){ 147 linked_item_t *it; 148 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 149 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 150 return (hci_connection_t *) it; 151 } 152 } 153 return NULL; 154 } 155 156 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 157 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 158 } 159 160 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 161 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 162 } 163 164 165 /** 166 * add authentication flags and reset timer 167 */ 168 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 169 bd_addr_t addr; 170 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 171 hci_connection_t * conn = connection_for_address(addr); 172 if (conn) { 173 connectionSetAuthenticationFlags(conn, flags); 174 hci_connection_timestamp(conn); 175 } 176 } 177 178 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 179 hci_connection_t * conn = connection_for_handle(handle); 180 if (!conn) return 0; 181 if (!conn->authentication_flags) return 0; 182 if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0; 183 if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0; 184 return 1; 185 } 186 187 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 188 if (hci_stack.remote_device_db) { 189 hci_stack.remote_device_db->delete_link_key(addr); 190 } 191 } 192 193 194 /** 195 * count connections 196 */ 197 static int nr_hci_connections(void){ 198 int count = 0; 199 linked_item_t *it; 200 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 201 return count; 202 } 203 204 /** 205 * Dummy handler called by HCI 206 */ 207 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 208 } 209 210 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 211 hci_connection_t * connection = connection_for_handle(handle); 212 if (!connection) { 213 log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 214 return 0; 215 } 216 return connection->num_acl_packets_sent; 217 } 218 219 uint8_t hci_number_free_acl_slots(){ 220 uint8_t free_slots = hci_stack.total_num_acl_packets; 221 linked_item_t *it; 222 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 223 hci_connection_t * connection = (hci_connection_t *) it; 224 if (free_slots < connection->num_acl_packets_sent) { 225 log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 226 return 0; 227 } 228 free_slots -= connection->num_acl_packets_sent; 229 } 230 return free_slots; 231 } 232 233 int hci_can_send_packet_now(uint8_t packet_type){ 234 235 // check for async hci transport implementations 236 if (hci_stack.hci_transport->can_send_packet_now){ 237 if (!hci_stack.hci_transport->can_send_packet_now(packet_type)){ 238 return 0; 239 } 240 } 241 242 // check regular Bluetooth flow control 243 switch (packet_type) { 244 case HCI_ACL_DATA_PACKET: 245 return hci_number_free_acl_slots(); 246 case HCI_COMMAND_DATA_PACKET: 247 return hci_stack.num_cmd_packets; 248 default: 249 return 0; 250 } 251 } 252 253 int hci_send_acl_packet(uint8_t *packet, int size){ 254 255 // check for free places on BT module 256 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 257 258 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 259 hci_connection_t *connection = connection_for_handle( con_handle); 260 if (!connection) return 0; 261 hci_connection_timestamp(connection); 262 263 // count packet 264 connection->num_acl_packets_sent++; 265 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 266 267 // send packet 268 int err = hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 269 270 return err; 271 } 272 273 static void acl_handler(uint8_t *packet, int size){ 274 275 // get info 276 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 277 hci_connection_t *conn = connection_for_handle(con_handle); 278 uint8_t acl_flags = READ_ACL_FLAGS(packet); 279 uint16_t acl_length = READ_ACL_LENGTH(packet); 280 281 // ignore non-registered handle 282 if (!conn){ 283 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 284 return; 285 } 286 287 // update idle timestamp 288 hci_connection_timestamp(conn); 289 290 // handle different packet types 291 switch (acl_flags & 0x03) { 292 293 case 0x01: // continuation fragment 294 295 // sanity check 296 if (conn->acl_recombination_pos == 0) { 297 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 298 return; 299 } 300 301 // append fragment payload (header already stored) 302 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 303 conn->acl_recombination_pos += acl_length; 304 305 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 306 // conn->acl_recombination_pos, conn->acl_recombination_length); 307 308 // forward complete L2CAP packet if complete. 309 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 310 311 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 312 // reset recombination buffer 313 conn->acl_recombination_length = 0; 314 conn->acl_recombination_pos = 0; 315 } 316 break; 317 318 case 0x02: { // first fragment 319 320 // sanity check 321 if (conn->acl_recombination_pos) { 322 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 323 return; 324 } 325 326 // peek into L2CAP packet! 327 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 328 329 // log_error( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 330 331 // compare fragment size to L2CAP packet size 332 if (acl_length >= l2cap_length + 4){ 333 334 // forward fragment as L2CAP packet 335 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 336 337 } else { 338 // store first fragment and tweak acl length for complete package 339 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 340 conn->acl_recombination_pos = acl_length + 4; 341 conn->acl_recombination_length = l2cap_length; 342 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 343 } 344 break; 345 346 } 347 default: 348 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 349 return; 350 } 351 352 // execute main loop 353 hci_run(); 354 } 355 356 static void hci_shutdown_connection(hci_connection_t *conn){ 357 log_info("Connection closed: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 358 359 // cancel all l2cap connections 360 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 361 362 run_loop_remove_timer(&conn->timeout); 363 364 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 365 btstack_memory_hci_connection_free( conn ); 366 367 // now it's gone 368 hci_emit_nr_connections_changed(); 369 } 370 371 static const uint16_t packet_type_sizes[] = { 372 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 373 HCI_ACL_DH1_SIZE, 0, 0, 0, 374 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 375 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 376 }; 377 static const uint8_t packet_type_feature_requirement_bit[] = { 378 0, // 3 slot packets 379 1, // 5 slot packets 380 25, // EDR 2 mpbs 381 26, // EDR 3 mbps 382 39, // 3 slot EDR packts 383 40, // 5 slot EDR packet 384 }; 385 static const uint16_t packet_type_feature_packet_mask[] = { 386 0x0f00, // 3 slot packets 387 0xf000, // 5 slot packets 388 0x1102, // EDR 2 mpbs 389 0x2204, // EDR 3 mbps 390 0x0300, // 3 slot EDR packts 391 0x3000, // 5 slot EDR packet 392 }; 393 394 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 395 // enable packet types based on size 396 uint16_t packet_types = 0; 397 int i; 398 for (i=0;i<16;i++){ 399 if (packet_type_sizes[i] == 0) continue; 400 if (packet_type_sizes[i] <= buffer_size){ 401 packet_types |= 1 << i; 402 } 403 } 404 // disable packet types due to missing local supported features 405 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 406 int bit_idx = packet_type_feature_requirement_bit[i]; 407 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 408 if (feature_set) continue; 409 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 410 packet_types &= ~packet_type_feature_packet_mask[i]; 411 } 412 // flip bits for "may not be used" 413 packet_types ^= 0x3306; 414 return packet_types; 415 } 416 417 uint16_t hci_usable_acl_packet_types(void){ 418 return hci_stack.packet_types; 419 } 420 421 uint8_t* hci_get_outgoing_acl_packet_buffer(void){ 422 // hci packet buffer is >= acl data packet length 423 return hci_stack.hci_packet_buffer; 424 } 425 426 uint16_t hci_max_acl_data_packet_length(){ 427 return hci_stack.acl_data_packet_length; 428 } 429 430 // avoid huge local variables 431 #ifndef EMBEDDED 432 static device_name_t device_name; 433 #endif 434 static void event_handler(uint8_t *packet, int size){ 435 bd_addr_t addr; 436 uint8_t link_type; 437 hci_con_handle_t handle; 438 hci_connection_t * conn; 439 int i; 440 441 // printf("HCI:EVENT:%02x\n", packet[0]); 442 443 switch (packet[0]) { 444 445 case HCI_EVENT_COMMAND_COMPLETE: 446 // get num cmd packets 447 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]); 448 hci_stack.num_cmd_packets = packet[2]; 449 450 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 451 // from offset 5 452 // status 453 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 454 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 455 // ignore: SCO data packet len (8) 456 hci_stack.total_num_acl_packets = packet[9]; 457 // ignore: total num SCO packets 458 if (hci_stack.state == HCI_STATE_INITIALIZING){ 459 // determine usable ACL payload size 460 if (HCI_ACL_PAYLOAD_SIZE < hci_stack.acl_data_packet_length){ 461 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 462 } 463 log_info("hci_read_buffer_size: used size %u, count %u\n", 464 hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 465 } 466 } 467 // Dump local address 468 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 469 bt_flip_addr(hci_stack.local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 470 log_info("Local Address, Status: 0x%02x: Addr: %s\n", 471 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack.local_bd_addr)); 472 } 473 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 474 hci_emit_discoverable_enabled(hci_stack.discoverable); 475 } 476 // Note: HCI init checks 477 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 478 memcpy(hci_stack.local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 479 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 480 hci_stack.local_supported_features[0], hci_stack.local_supported_features[1], 481 hci_stack.local_supported_features[2], hci_stack.local_supported_features[3], 482 hci_stack.local_supported_features[4], hci_stack.local_supported_features[5], 483 hci_stack.local_supported_features[6], hci_stack.local_supported_features[7]); 484 485 // determine usable ACL packet types based buffer size and supported features 486 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]); 487 log_info("packet types %04x\n", hci_stack.packet_types); 488 } 489 break; 490 491 case HCI_EVENT_COMMAND_STATUS: 492 // get num cmd packets 493 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]); 494 hci_stack.num_cmd_packets = packet[3]; 495 break; 496 497 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 498 for (i=0; i<packet[2];i++){ 499 handle = READ_BT_16(packet, 3 + 2*i); 500 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 501 conn = connection_for_handle(handle); 502 if (!conn){ 503 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 504 continue; 505 } 506 conn->num_acl_packets_sent -= num_packets; 507 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 508 } 509 break; 510 511 case HCI_EVENT_CONNECTION_REQUEST: 512 bt_flip_addr(addr, &packet[2]); 513 // TODO: eval COD 8-10 514 link_type = packet[11]; 515 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 516 if (link_type == 1) { // ACL 517 conn = connection_for_address(addr); 518 if (!conn) { 519 conn = create_connection_for_addr(addr); 520 } 521 if (!conn) { 522 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 523 hci_stack.decline_reason = 0x0d; 524 BD_ADDR_COPY(hci_stack.decline_addr, addr); 525 break; 526 } 527 conn->state = RECEIVED_CONNECTION_REQUEST; 528 hci_run(); 529 } else { 530 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 531 hci_stack.decline_reason = 0x0a; 532 BD_ADDR_COPY(hci_stack.decline_addr, addr); 533 } 534 break; 535 536 case HCI_EVENT_CONNECTION_COMPLETE: 537 // Connection management 538 bt_flip_addr(addr, &packet[5]); 539 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 540 conn = connection_for_address(addr); 541 if (conn) { 542 if (!packet[2]){ 543 conn->state = OPEN; 544 conn->con_handle = READ_BT_16(packet, 3); 545 546 // restart timer 547 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 548 run_loop_add_timer(&conn->timeout); 549 550 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 551 552 hci_emit_nr_connections_changed(); 553 } else { 554 // connection failed, remove entry 555 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 556 btstack_memory_hci_connection_free( conn ); 557 558 // if authentication error, also delete link key 559 if (packet[2] == 0x05) { 560 hci_drop_link_key_for_bd_addr(&addr); 561 } 562 } 563 } 564 break; 565 566 case HCI_EVENT_LINK_KEY_REQUEST: 567 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 568 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 569 if (!hci_stack.remote_device_db) break; 570 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 571 hci_run(); 572 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 573 return; 574 575 case HCI_EVENT_LINK_KEY_NOTIFICATION: 576 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 577 if (!hci_stack.remote_device_db) break; 578 bt_flip_addr(addr, &packet[2]); 579 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 580 // still forward event to allow dismiss of pairing dialog 581 break; 582 583 case HCI_EVENT_PIN_CODE_REQUEST: 584 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 585 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 586 if (!hci_stack.remote_device_db) break; 587 bt_flip_addr(addr, &packet[2]); 588 hci_stack.remote_device_db->delete_link_key(&addr); 589 break; 590 591 case HCI_EVENT_IO_CAPABILITY_REQUEST: 592 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 593 if (hci_stack.ssp_io_capability == SSP_IO_CAPABILITY_UNKNOWN) break; 594 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 595 break; 596 597 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 598 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_CONFIRM_REQUEST); 599 if (!hci_stack.ssp_auto_accept) break; 600 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 601 break; 602 603 case HCI_EVENT_USER_PASSKEY_REQUEST: 604 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_PASSKEY_REQUEST); 605 if (!hci_stack.ssp_auto_accept) break; 606 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 607 break; 608 609 #ifndef EMBEDDED 610 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 611 if (!hci_stack.remote_device_db) break; 612 if (packet[2]) break; // status not ok 613 bt_flip_addr(addr, &packet[3]); 614 // fix for invalid remote names - terminate on 0xff 615 for (i=0; i<248;i++){ 616 if (packet[9+i] == 0xff){ 617 packet[9+i] = 0; 618 break; 619 } 620 } 621 memset(&device_name, 0, sizeof(device_name_t)); 622 strncpy((char*) device_name, (char*) &packet[9], 248); 623 hci_stack.remote_device_db->put_name(&addr, &device_name); 624 break; 625 626 case HCI_EVENT_INQUIRY_RESULT: 627 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 628 if (!hci_stack.remote_device_db) break; 629 // first send inq result packet 630 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 631 // then send cached remote names 632 for (i=0; i<packet[2];i++){ 633 bt_flip_addr(addr, &packet[3+i*6]); 634 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 635 hci_emit_remote_name_cached(&addr, &device_name); 636 } 637 } 638 return; 639 #endif 640 641 case HCI_EVENT_DISCONNECTION_COMPLETE: 642 if (!packet[2]){ 643 handle = READ_BT_16(packet, 3); 644 hci_connection_t * conn = connection_for_handle(handle); 645 if (conn) { 646 hci_shutdown_connection(conn); 647 } 648 } 649 break; 650 651 case HCI_EVENT_HARDWARE_ERROR: 652 if(hci_stack.control->hw_error){ 653 (*hci_stack.control->hw_error)(); 654 } 655 break; 656 657 #ifdef HAVE_BLE 658 case HCI_EVENT_LE_META: 659 switch (packet[2]) { 660 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 661 // Connection management 662 bt_flip_addr(addr, &packet[8]); 663 log_info("LE Connection_complete (status=%u) %s\n", packet[3], bd_addr_to_str(addr)); 664 // LE connections are auto-accepted, so just create a connection if there isn't one already 665 conn = connection_for_address(addr); 666 if (packet[3]){ 667 if (conn){ 668 // outgoing connection failed, remove entry 669 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 670 btstack_memory_hci_connection_free( conn ); 671 672 } 673 // if authentication error, also delete link key 674 if (packet[3] == 0x05) { 675 hci_drop_link_key_for_bd_addr(&addr); 676 } 677 break; 678 } 679 if (!conn){ 680 conn = create_connection_for_addr(addr); 681 } 682 if (!conn){ 683 // no memory 684 break; 685 } 686 687 conn->state = OPEN; 688 conn->con_handle = READ_BT_16(packet, 4); 689 690 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 691 692 // restart timer 693 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 694 // run_loop_add_timer(&conn->timeout); 695 696 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 697 698 hci_emit_nr_connections_changed(); 699 break; 700 701 default: 702 break; 703 } 704 break; 705 #endif 706 707 default: 708 break; 709 } 710 711 // handle BT initialization 712 if (hci_stack.state == HCI_STATE_INITIALIZING){ 713 // handle H4 synchronization loss on restart 714 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 715 // hci_stack.substate = 0; 716 // } 717 // handle normal init sequence 718 if (hci_stack.substate % 2){ 719 // odd: waiting for event 720 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 721 hci_stack.substate++; 722 } 723 } 724 } 725 726 // help with BT sleep 727 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 728 && hci_stack.substate == 1 729 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 730 hci_stack.substate++; 731 } 732 733 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 734 735 // execute main loop 736 hci_run(); 737 } 738 739 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 740 switch (packet_type) { 741 case HCI_EVENT_PACKET: 742 event_handler(packet, size); 743 break; 744 case HCI_ACL_DATA_PACKET: 745 acl_handler(packet, size); 746 break; 747 default: 748 break; 749 } 750 } 751 752 /** Register HCI packet handlers */ 753 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 754 hci_stack.packet_handler = handler; 755 } 756 757 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 758 759 // reference to use transport layer implementation 760 hci_stack.hci_transport = transport; 761 762 // references to used control implementation 763 hci_stack.control = control; 764 765 // reference to used config 766 hci_stack.config = config; 767 768 // no connections yet 769 hci_stack.connections = NULL; 770 hci_stack.discoverable = 0; 771 hci_stack.connectable = 0; 772 773 // no pending cmds 774 hci_stack.decline_reason = 0; 775 hci_stack.new_scan_enable_value = 0xff; 776 777 // higher level handler 778 hci_stack.packet_handler = dummy_handler; 779 780 // store and open remote device db 781 hci_stack.remote_device_db = remote_device_db; 782 if (hci_stack.remote_device_db) { 783 hci_stack.remote_device_db->open(); 784 } 785 786 // max acl payload size defined in config.h 787 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 788 789 // register packet handlers with transport 790 transport->register_packet_handler(&packet_handler); 791 792 hci_stack.state = HCI_STATE_OFF; 793 794 // class of device 795 hci_stack.class_of_device = 0x007a020c; // Smartphone 796 797 // Secure Simple Pairing 798 hci_stack.ssp_enable = 0; 799 hci_stack.ssp_io_capability = SSP_IO_CAPABILITY_UNKNOWN; 800 hci_stack.ssp_authentication_requirement = 0; 801 } 802 803 void hci_close(){ 804 // close remote device db 805 if (hci_stack.remote_device_db) { 806 hci_stack.remote_device_db->close(); 807 } 808 while (hci_stack.connections) { 809 hci_shutdown_connection((hci_connection_t *) hci_stack.connections); 810 } 811 hci_power_control(HCI_POWER_OFF); 812 } 813 814 // State-Module-Driver overview 815 // state module low-level 816 // HCI_STATE_OFF off close 817 // HCI_STATE_INITIALIZING, on open 818 // HCI_STATE_WORKING, on open 819 // HCI_STATE_HALTING, on open 820 // HCI_STATE_SLEEPING, off/sleep close 821 // HCI_STATE_FALLING_ASLEEP on open 822 823 static int hci_power_control_on(void){ 824 825 // power on 826 int err = 0; 827 if (hci_stack.control && hci_stack.control->on){ 828 err = (*hci_stack.control->on)(hci_stack.config); 829 } 830 if (err){ 831 log_error( "POWER_ON failed\n"); 832 hci_emit_hci_open_failed(); 833 return err; 834 } 835 836 // open low-level device 837 err = hci_stack.hci_transport->open(hci_stack.config); 838 if (err){ 839 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 840 if (hci_stack.control && hci_stack.control->off){ 841 (*hci_stack.control->off)(hci_stack.config); 842 } 843 hci_emit_hci_open_failed(); 844 return err; 845 } 846 return 0; 847 } 848 849 static void hci_power_control_off(void){ 850 851 log_info("hci_power_control_off\n"); 852 853 // close low-level device 854 hci_stack.hci_transport->close(hci_stack.config); 855 856 log_info("hci_power_control_off - hci_transport closed\n"); 857 858 // power off 859 if (hci_stack.control && hci_stack.control->off){ 860 (*hci_stack.control->off)(hci_stack.config); 861 } 862 863 log_info("hci_power_control_off - control closed\n"); 864 865 hci_stack.state = HCI_STATE_OFF; 866 } 867 868 static void hci_power_control_sleep(void){ 869 870 log_info("hci_power_control_sleep\n"); 871 872 #if 0 873 // don't close serial port during sleep 874 875 // close low-level device 876 hci_stack.hci_transport->close(hci_stack.config); 877 #endif 878 879 // sleep mode 880 if (hci_stack.control && hci_stack.control->sleep){ 881 (*hci_stack.control->sleep)(hci_stack.config); 882 } 883 884 hci_stack.state = HCI_STATE_SLEEPING; 885 } 886 887 static int hci_power_control_wake(void){ 888 889 log_info("hci_power_control_wake\n"); 890 891 // wake on 892 if (hci_stack.control && hci_stack.control->wake){ 893 (*hci_stack.control->wake)(hci_stack.config); 894 } 895 896 #if 0 897 // open low-level device 898 int err = hci_stack.hci_transport->open(hci_stack.config); 899 if (err){ 900 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 901 if (hci_stack.control && hci_stack.control->off){ 902 (*hci_stack.control->off)(hci_stack.config); 903 } 904 hci_emit_hci_open_failed(); 905 return err; 906 } 907 #endif 908 909 return 0; 910 } 911 912 913 int hci_power_control(HCI_POWER_MODE power_mode){ 914 915 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 916 917 int err = 0; 918 switch (hci_stack.state){ 919 920 case HCI_STATE_OFF: 921 switch (power_mode){ 922 case HCI_POWER_ON: 923 err = hci_power_control_on(); 924 if (err) return err; 925 // set up state machine 926 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 927 hci_stack.state = HCI_STATE_INITIALIZING; 928 hci_stack.substate = 0; 929 break; 930 case HCI_POWER_OFF: 931 // do nothing 932 break; 933 case HCI_POWER_SLEEP: 934 // do nothing (with SLEEP == OFF) 935 break; 936 } 937 break; 938 939 case HCI_STATE_INITIALIZING: 940 switch (power_mode){ 941 case HCI_POWER_ON: 942 // do nothing 943 break; 944 case HCI_POWER_OFF: 945 // no connections yet, just turn it off 946 hci_power_control_off(); 947 break; 948 case HCI_POWER_SLEEP: 949 // no connections yet, just turn it off 950 hci_power_control_sleep(); 951 break; 952 } 953 break; 954 955 case HCI_STATE_WORKING: 956 switch (power_mode){ 957 case HCI_POWER_ON: 958 // do nothing 959 break; 960 case HCI_POWER_OFF: 961 // see hci_run 962 hci_stack.state = HCI_STATE_HALTING; 963 break; 964 case HCI_POWER_SLEEP: 965 // see hci_run 966 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 967 hci_stack.substate = 0; 968 break; 969 } 970 break; 971 972 case HCI_STATE_HALTING: 973 switch (power_mode){ 974 case HCI_POWER_ON: 975 // set up state machine 976 hci_stack.state = HCI_STATE_INITIALIZING; 977 hci_stack.substate = 0; 978 break; 979 case HCI_POWER_OFF: 980 // do nothing 981 break; 982 case HCI_POWER_SLEEP: 983 // see hci_run 984 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 985 hci_stack.substate = 0; 986 break; 987 } 988 break; 989 990 case HCI_STATE_FALLING_ASLEEP: 991 switch (power_mode){ 992 case HCI_POWER_ON: 993 994 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 995 // nothing to do, if H4 supports power management 996 if (bt_control_iphone_power_management_enabled()){ 997 hci_stack.state = HCI_STATE_INITIALIZING; 998 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 999 break; 1000 } 1001 #endif 1002 // set up state machine 1003 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1004 hci_stack.state = HCI_STATE_INITIALIZING; 1005 hci_stack.substate = 0; 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 // do nothing 1013 break; 1014 } 1015 break; 1016 1017 case HCI_STATE_SLEEPING: 1018 switch (power_mode){ 1019 case HCI_POWER_ON: 1020 1021 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1022 // nothing to do, if H4 supports power management 1023 if (bt_control_iphone_power_management_enabled()){ 1024 hci_stack.state = HCI_STATE_INITIALIZING; 1025 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1026 hci_update_scan_enable(); 1027 break; 1028 } 1029 #endif 1030 err = hci_power_control_wake(); 1031 if (err) return err; 1032 // set up state machine 1033 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1034 hci_stack.state = HCI_STATE_INITIALIZING; 1035 hci_stack.substate = 0; 1036 break; 1037 case HCI_POWER_OFF: 1038 hci_stack.state = HCI_STATE_HALTING; 1039 break; 1040 case HCI_POWER_SLEEP: 1041 // do nothing 1042 break; 1043 } 1044 break; 1045 } 1046 1047 // create internal event 1048 hci_emit_state(); 1049 1050 // trigger next/first action 1051 hci_run(); 1052 1053 return 0; 1054 } 1055 1056 static void hci_update_scan_enable(void){ 1057 // 2 = page scan, 1 = inq scan 1058 hci_stack.new_scan_enable_value = hci_stack.connectable << 1 | hci_stack.discoverable; 1059 hci_run(); 1060 } 1061 1062 void hci_discoverable_control(uint8_t enable){ 1063 if (enable) enable = 1; // normalize argument 1064 1065 if (hci_stack.discoverable == enable){ 1066 hci_emit_discoverable_enabled(hci_stack.discoverable); 1067 return; 1068 } 1069 1070 hci_stack.discoverable = enable; 1071 hci_update_scan_enable(); 1072 } 1073 1074 void hci_connectable_control(uint8_t enable){ 1075 if (enable) enable = 1; // normalize argument 1076 1077 // don't emit event 1078 if (hci_stack.connectable == enable) return; 1079 1080 hci_stack.connectable = enable; 1081 hci_update_scan_enable(); 1082 } 1083 1084 void hci_run(){ 1085 1086 hci_connection_t * connection; 1087 linked_item_t * it; 1088 1089 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1090 1091 // global/non-connection oriented commands 1092 1093 // decline incoming connections 1094 if (hci_stack.decline_reason){ 1095 uint8_t reason = hci_stack.decline_reason; 1096 hci_stack.decline_reason = 0; 1097 hci_send_cmd(&hci_reject_connection_request, hci_stack.decline_addr, reason); 1098 return; 1099 } 1100 1101 // send scan enable 1102 if (hci_stack.state == HCI_STATE_WORKING && hci_stack.new_scan_enable_value != 0xff){ 1103 hci_send_cmd(&hci_write_scan_enable, hci_stack.new_scan_enable_value); 1104 hci_stack.new_scan_enable_value = 0xff; 1105 return; 1106 } 1107 1108 // send pending HCI commands 1109 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 1110 1111 connection = (hci_connection_t *) it; 1112 1113 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 1114 log_info("sending hci_accept_connection_request\n"); 1115 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1116 connection->state = ACCEPTED_CONNECTION_REQUEST; 1117 return; 1118 } 1119 1120 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1121 link_key_t link_key; 1122 log_info("responding to link key request\n"); 1123 if ( hci_stack.remote_device_db->get_link_key( &connection->address, &link_key)){ 1124 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1125 } else { 1126 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1127 } 1128 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1129 return; 1130 } 1131 1132 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1133 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack.ssp_io_capability, NULL, hci_stack.ssp_authentication_requirement); 1134 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1135 return; 1136 } 1137 1138 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1139 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1140 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1141 return; 1142 } 1143 1144 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1145 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1146 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1147 return; 1148 } 1149 } 1150 1151 switch (hci_stack.state){ 1152 case HCI_STATE_INITIALIZING: 1153 // log_info("hci_init: substate %u\n", hci_stack.substate); 1154 if (hci_stack.substate % 2) { 1155 // odd: waiting for command completion 1156 return; 1157 } 1158 switch (hci_stack.substate >> 1){ 1159 case 0: // RESET 1160 hci_send_cmd(&hci_reset); 1161 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 1162 // skip baud change 1163 hci_stack.substate = 4; // >> 1 = 2 1164 } 1165 break; 1166 case 1: // SEND BAUD CHANGE 1167 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_packet_buffer); 1168 hci_send_cmd_packet(hci_stack.hci_packet_buffer, 3 + hci_stack.hci_packet_buffer[2]); 1169 break; 1170 case 2: // LOCAL BAUD CHANGE 1171 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 1172 hci_stack.substate += 2; 1173 // break missing here for fall through 1174 1175 case 3: 1176 // custom initialization 1177 if (hci_stack.control && hci_stack.control->next_cmd){ 1178 int valid_cmd = (*hci_stack.control->next_cmd)(hci_stack.config, hci_stack.hci_packet_buffer); 1179 if (valid_cmd){ 1180 int size = 3 + hci_stack.hci_packet_buffer[2]; 1181 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack.hci_packet_buffer, size); 1182 hci_stack.substate = 4; // more init commands 1183 break; 1184 } 1185 log_info("hci_run: init script done\n\r"); 1186 } 1187 // otherwise continue 1188 hci_send_cmd(&hci_read_bd_addr); 1189 break; 1190 case 4: 1191 hci_send_cmd(&hci_read_buffer_size); 1192 break; 1193 case 5: 1194 hci_send_cmd(&hci_read_local_supported_features); 1195 break; 1196 case 6: 1197 // ca. 15 sec 1198 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1199 break; 1200 case 7: 1201 hci_send_cmd(&hci_write_class_of_device, hci_stack.class_of_device); 1202 break; 1203 case 8: 1204 if (hci_stack.local_name){ 1205 hci_send_cmd(&hci_write_local_name, hci_stack.local_name); 1206 } else { 1207 char hostname[30]; 1208 #ifdef EMBEDDED 1209 // BTstack-11:22:33:44:55:66 1210 strcpy(hostname, "BTstack "); 1211 strcat(hostname, bd_addr_to_str(hci_stack.local_bd_addr)); 1212 printf("---> Name %s\n", hostname); 1213 #else 1214 // hostname for POSIX systems 1215 gethostname(hostname, 30); 1216 hostname[29] = '\0'; 1217 #endif 1218 hci_send_cmd(&hci_write_local_name, hostname); 1219 } 1220 break; 1221 case 9: 1222 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0xFFFFFFFF); ///0x1DFFFFFF 1223 break; 1224 case 10: 1225 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack.ssp_enable); 1226 break; 1227 case 11: 1228 hci_send_cmd(&hci_write_scan_enable, (hci_stack.connectable << 1) | hci_stack.discoverable); // page scan 1229 break; 1230 case 12: 1231 // done. 1232 hci_stack.state = HCI_STATE_WORKING; 1233 hci_emit_state(); 1234 break; 1235 default: 1236 break; 1237 } 1238 hci_stack.substate++; 1239 break; 1240 1241 case HCI_STATE_HALTING: 1242 1243 log_info("HCI_STATE_HALTING\n"); 1244 // close all open connections 1245 connection = (hci_connection_t *) hci_stack.connections; 1246 if (connection){ 1247 1248 // send disconnect 1249 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1250 1251 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1252 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1253 1254 // send disconnected event right away - causes higher layer connections to get closed, too. 1255 hci_shutdown_connection(connection); 1256 return; 1257 } 1258 log_info("HCI_STATE_HALTING, calling off\n"); 1259 1260 // switch mode 1261 hci_power_control_off(); 1262 1263 log_info("HCI_STATE_HALTING, emitting state\n"); 1264 hci_emit_state(); 1265 log_info("HCI_STATE_HALTING, done\n"); 1266 break; 1267 1268 case HCI_STATE_FALLING_ASLEEP: 1269 switch(hci_stack.substate) { 1270 case 0: 1271 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1272 // close all open connections 1273 connection = (hci_connection_t *) hci_stack.connections; 1274 1275 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1276 // don't close connections, if H4 supports power management 1277 if (bt_control_iphone_power_management_enabled()){ 1278 connection = NULL; 1279 } 1280 #endif 1281 if (connection){ 1282 1283 // send disconnect 1284 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1285 1286 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1287 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1288 1289 // send disconnected event right away - causes higher layer connections to get closed, too. 1290 hci_shutdown_connection(connection); 1291 return; 1292 } 1293 1294 // disable page and inquiry scan 1295 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1296 1297 log_info("HCI_STATE_HALTING, disabling inq cans\n"); 1298 hci_send_cmd(&hci_write_scan_enable, hci_stack.connectable << 1); // drop inquiry scan but keep page scan 1299 1300 // continue in next sub state 1301 hci_stack.substate++; 1302 break; 1303 case 1: 1304 // wait for command complete "hci_write_scan_enable" in event_handler(); 1305 break; 1306 case 2: 1307 log_info("HCI_STATE_HALTING, calling sleep\n"); 1308 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1309 // don't actually go to sleep, if H4 supports power management 1310 if (bt_control_iphone_power_management_enabled()){ 1311 // SLEEP MODE reached 1312 hci_stack.state = HCI_STATE_SLEEPING; 1313 hci_emit_state(); 1314 break; 1315 } 1316 #endif 1317 // switch mode 1318 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1319 hci_emit_state(); 1320 break; 1321 1322 default: 1323 break; 1324 } 1325 break; 1326 1327 default: 1328 break; 1329 } 1330 } 1331 1332 int hci_send_cmd_packet(uint8_t *packet, int size){ 1333 bd_addr_t addr; 1334 hci_connection_t * conn; 1335 // house-keeping 1336 1337 // create_connection? 1338 if (IS_COMMAND(packet, hci_create_connection)){ 1339 bt_flip_addr(addr, &packet[3]); 1340 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1341 conn = connection_for_address(addr); 1342 if (conn) { 1343 // if connection exists 1344 if (conn->state == OPEN) { 1345 // and OPEN, emit connection complete command 1346 hci_emit_connection_complete(conn, 0); 1347 } 1348 // otherwise, just ignore as it is already in the open process 1349 return 0; // don't sent packet to controller 1350 1351 } 1352 // create connection struct and register, state = SENT_CREATE_CONNECTION 1353 conn = create_connection_for_addr(addr); 1354 if (!conn){ 1355 // notify client that alloc failed 1356 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1357 return 0; // don't sent packet to controller 1358 } 1359 conn->state = SENT_CREATE_CONNECTION; 1360 } 1361 1362 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1363 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1364 } 1365 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1366 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1367 } 1368 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1369 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1370 } 1371 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1372 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 1373 } 1374 1375 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1376 if (hci_stack.remote_device_db){ 1377 bt_flip_addr(addr, &packet[3]); 1378 hci_stack.remote_device_db->delete_link_key(&addr); 1379 } 1380 } 1381 1382 hci_stack.num_cmd_packets--; 1383 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1384 } 1385 1386 // Configure Secure Simple Pairing 1387 1388 // enable will enable SSP during init 1389 void hci_ssp_set_enable(int enable){ 1390 hci_stack.ssp_enable = enable; 1391 } 1392 1393 // if set, BTstack will respond to io capability request using authentication requirement 1394 void hci_ssp_set_io_capability(int io_capability){ 1395 hci_stack.ssp_io_capability = io_capability; 1396 } 1397 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 1398 hci_stack.ssp_authentication_requirement = authentication_requirement; 1399 } 1400 1401 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 1402 void hci_ssp_set_auto_accept(int auto_accept){ 1403 hci_stack.ssp_auto_accept = auto_accept; 1404 } 1405 1406 /** 1407 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1408 */ 1409 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1410 va_list argptr; 1411 va_start(argptr, cmd); 1412 uint16_t size = hci_create_cmd_internal(hci_stack.hci_packet_buffer, cmd, argptr); 1413 va_end(argptr); 1414 return hci_send_cmd_packet(hci_stack.hci_packet_buffer, size); 1415 } 1416 1417 // Create various non-HCI events. 1418 // TODO: generalize, use table similar to hci_create_command 1419 1420 void hci_emit_state(){ 1421 log_info("BTSTACK_EVENT_STATE %u", hci_stack.state); 1422 uint8_t event[3]; 1423 event[0] = BTSTACK_EVENT_STATE; 1424 event[1] = sizeof(event) - 2; 1425 event[2] = hci_stack.state; 1426 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1427 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1428 } 1429 1430 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1431 uint8_t event[13]; 1432 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1433 event[1] = sizeof(event) - 2; 1434 event[2] = status; 1435 bt_store_16(event, 3, conn->con_handle); 1436 bt_flip_addr(&event[5], conn->address); 1437 event[11] = 1; // ACL connection 1438 event[12] = 0; // encryption disabled 1439 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1440 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1441 } 1442 1443 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1444 uint8_t event[6]; 1445 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1446 event[1] = sizeof(event) - 2; 1447 event[2] = 0; // status = OK 1448 bt_store_16(event, 3, handle); 1449 event[5] = reason; 1450 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1451 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1452 } 1453 1454 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1455 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 1456 uint8_t event[4]; 1457 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1458 event[1] = sizeof(event) - 2; 1459 bt_store_16(event, 2, conn->con_handle); 1460 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1461 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1462 } 1463 1464 void hci_emit_nr_connections_changed(){ 1465 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 1466 uint8_t event[3]; 1467 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1468 event[1] = sizeof(event) - 2; 1469 event[2] = nr_hci_connections(); 1470 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1471 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1472 } 1473 1474 void hci_emit_hci_open_failed(){ 1475 log_info("BTSTACK_EVENT_POWERON_FAILED"); 1476 uint8_t event[2]; 1477 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1478 event[1] = sizeof(event) - 2; 1479 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1480 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1481 } 1482 1483 #ifndef EMBEDDED 1484 void hci_emit_btstack_version() { 1485 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 1486 uint8_t event[6]; 1487 event[0] = BTSTACK_EVENT_VERSION; 1488 event[1] = sizeof(event) - 2; 1489 event[2] = BTSTACK_MAJOR; 1490 event[3] = BTSTACK_MINOR; 1491 bt_store_16(event, 4, BTSTACK_REVISION); 1492 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1493 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1494 } 1495 #endif 1496 1497 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1498 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 1499 uint8_t event[3]; 1500 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1501 event[1] = sizeof(event) - 2; 1502 event[2] = enabled; 1503 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1504 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1505 } 1506 1507 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1508 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 1509 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1510 event[1] = sizeof(event) - 2 - 1; 1511 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1512 bt_flip_addr(&event[3], *addr); 1513 memcpy(&event[9], name, 248); 1514 1515 event[9+248] = 0; // assert \0 for log_info 1516 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 1517 1518 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 1519 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 1520 } 1521 1522 void hci_emit_discoverable_enabled(uint8_t enabled){ 1523 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 1524 uint8_t event[3]; 1525 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1526 event[1] = sizeof(event) - 2; 1527 event[2] = enabled; 1528 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1529 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1530 } 1531