1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 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 BLUEKITCHEN GMBH 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 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 #define HCI_RESET_RESEND_TIMEOUT_MS 200 98 99 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 100 #ifndef GAP_INQUIRY_MAX_NAME_LEN 101 #define GAP_INQUIRY_MAX_NAME_LEN 32 102 #endif 103 104 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 105 #define GAP_INQUIRY_DURATION_MIN 0x01 106 #define GAP_INQUIRY_DURATION_MAX 0x30 107 #define GAP_INQUIRY_STATE_ACTIVE 0x80 108 #define GAP_INQUIRY_STATE_IDLE 0 109 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 110 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 111 112 // GAP Remote Name Request 113 #define GAP_REMOTE_NAME_STATE_IDLE 0 114 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 115 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 116 117 // GAP Pairing 118 #define GAP_PAIRING_STATE_IDLE 0 119 #define GAP_PAIRING_STATE_SEND_PIN 1 120 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 121 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 122 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 123 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 124 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 125 126 127 // prototypes 128 #ifdef ENABLE_CLASSIC 129 static void hci_update_scan_enable(void); 130 static void hci_emit_discoverable_enabled(uint8_t enabled); 131 static int hci_local_ssp_activated(void); 132 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 133 static void hci_notify_if_sco_can_send_now(void); 134 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 135 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 136 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 137 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 138 static void hci_connection_timestamp(hci_connection_t *connection); 139 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 140 static void gap_inquiry_explode(uint8_t * packet); 141 #endif 142 143 static int hci_power_control_on(void); 144 static void hci_power_control_off(void); 145 static void hci_state_reset(void); 146 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 147 static void hci_emit_nr_connections_changed(void); 148 static void hci_emit_hci_open_failed(void); 149 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 150 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 151 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 152 static void hci_run(void); 153 static int hci_is_le_connection(hci_connection_t * connection); 154 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 155 156 #ifdef ENABLE_BLE 157 #ifdef ENABLE_LE_CENTRAL 158 // called from test/ble_client/advertising_data_parser.c 159 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 160 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 161 #endif 162 #endif 163 164 // the STACK is here 165 #ifndef HAVE_MALLOC 166 static hci_stack_t hci_stack_static; 167 #endif 168 static hci_stack_t * hci_stack = NULL; 169 170 #ifdef ENABLE_CLASSIC 171 // default name 172 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 173 174 // test helper 175 static uint8_t disable_l2cap_timeouts = 0; 176 #endif 177 178 /** 179 * create connection for given address 180 * 181 * @return connection OR NULL, if no memory left 182 */ 183 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 184 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 185 hci_connection_t * conn = btstack_memory_hci_connection_get(); 186 if (!conn) return NULL; 187 memset(conn, 0, sizeof(hci_connection_t)); 188 bd_addr_copy(conn->address, addr); 189 conn->address_type = addr_type; 190 conn->con_handle = 0xffff; 191 conn->authentication_flags = AUTH_FLAGS_NONE; 192 conn->bonding_flags = 0; 193 conn->requested_security_level = LEVEL_0; 194 #ifdef ENABLE_CLASSIC 195 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 196 btstack_run_loop_set_timer_context(&conn->timeout, conn); 197 hci_connection_timestamp(conn); 198 #endif 199 conn->acl_recombination_length = 0; 200 conn->acl_recombination_pos = 0; 201 conn->num_acl_packets_sent = 0; 202 conn->num_sco_packets_sent = 0; 203 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 204 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 205 return conn; 206 } 207 208 209 /** 210 * get le connection parameter range 211 * 212 * @return le connection parameter range struct 213 */ 214 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 215 *range = hci_stack->le_connection_parameter_range; 216 } 217 218 /** 219 * set le connection parameter range 220 * 221 */ 222 223 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 224 hci_stack->le_connection_parameter_range = *range; 225 } 226 227 /** 228 * get hci connections iterator 229 * 230 * @return hci connections iterator 231 */ 232 233 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 234 btstack_linked_list_iterator_init(it, &hci_stack->connections); 235 } 236 237 /** 238 * get connection for a given handle 239 * 240 * @return connection OR NULL, if not found 241 */ 242 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 243 btstack_linked_list_iterator_t it; 244 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 245 while (btstack_linked_list_iterator_has_next(&it)){ 246 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 247 if ( item->con_handle == con_handle ) { 248 return item; 249 } 250 } 251 return NULL; 252 } 253 254 /** 255 * get connection for given address 256 * 257 * @return connection OR NULL, if not found 258 */ 259 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 260 btstack_linked_list_iterator_t it; 261 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 262 while (btstack_linked_list_iterator_has_next(&it)){ 263 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 264 if (connection->address_type != addr_type) continue; 265 if (memcmp(addr, connection->address, 6) != 0) continue; 266 return connection; 267 } 268 return NULL; 269 } 270 271 272 #ifdef ENABLE_CLASSIC 273 274 #ifdef ENABLE_SCO_OVER_HCI 275 static int hci_number_sco_connections(void){ 276 int connections = 0; 277 btstack_linked_list_iterator_t it; 278 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 279 while (btstack_linked_list_iterator_has_next(&it)){ 280 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 281 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 282 connections++; 283 } 284 return connections; 285 } 286 #endif 287 288 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 289 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 290 #ifdef HAVE_EMBEDDED_TICK 291 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 292 // connections might be timed out 293 hci_emit_l2cap_check_timeout(connection); 294 } 295 #else 296 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 297 // connections might be timed out 298 hci_emit_l2cap_check_timeout(connection); 299 } 300 #endif 301 } 302 303 static void hci_connection_timestamp(hci_connection_t *connection){ 304 #ifdef HAVE_EMBEDDED_TICK 305 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 306 #else 307 connection->timestamp = btstack_run_loop_get_time_ms(); 308 #endif 309 } 310 311 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 312 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 313 } 314 315 316 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 317 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 318 } 319 320 /** 321 * add authentication flags and reset timer 322 * @note: assumes classic connection 323 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 324 */ 325 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 326 bd_addr_t addr; 327 reverse_bd_addr(bd_addr, addr); 328 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 329 if (conn) { 330 connectionSetAuthenticationFlags(conn, flags); 331 hci_connection_timestamp(conn); 332 } 333 } 334 335 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 336 hci_connection_t * conn = hci_connection_for_handle(handle); 337 if (!conn) return 0; 338 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 339 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 340 return 0; 341 } 342 343 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 344 if (!hci_stack->link_key_db) return; 345 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 346 hci_stack->link_key_db->delete_link_key(addr); 347 } 348 349 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 350 if (!hci_stack->link_key_db) return; 351 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 352 hci_stack->link_key_db->put_link_key(addr, link_key, type); 353 } 354 #endif 355 356 static int hci_is_le_connection(hci_connection_t * connection){ 357 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 358 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 359 } 360 361 /** 362 * count connections 363 */ 364 static int nr_hci_connections(void){ 365 int count = 0; 366 btstack_linked_item_t *it; 367 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 368 return count; 369 } 370 371 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 372 373 unsigned int num_packets_sent_classic = 0; 374 unsigned int num_packets_sent_le = 0; 375 376 btstack_linked_item_t *it; 377 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 378 hci_connection_t * connection = (hci_connection_t *) it; 379 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 380 num_packets_sent_classic += connection->num_acl_packets_sent; 381 } else { 382 num_packets_sent_le += connection->num_acl_packets_sent; 383 } 384 } 385 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 386 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 387 int free_slots_le = 0; 388 389 if (free_slots_classic < 0){ 390 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 391 return 0; 392 } 393 394 if (hci_stack->le_acl_packets_total_num){ 395 // if we have LE slots, they are used 396 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 397 if (free_slots_le < 0){ 398 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 399 return 0; 400 } 401 } else { 402 // otherwise, classic slots are used for LE, too 403 free_slots_classic -= num_packets_sent_le; 404 if (free_slots_classic < 0){ 405 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 406 return 0; 407 } 408 } 409 410 switch (address_type){ 411 case BD_ADDR_TYPE_UNKNOWN: 412 log_error("hci_number_free_acl_slots: unknown address type"); 413 return 0; 414 415 case BD_ADDR_TYPE_CLASSIC: 416 return free_slots_classic; 417 418 default: 419 if (hci_stack->le_acl_packets_total_num){ 420 return free_slots_le; 421 } 422 return free_slots_classic; 423 } 424 } 425 426 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 427 // get connection type 428 hci_connection_t * connection = hci_connection_for_handle(con_handle); 429 if (!connection){ 430 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 431 return 0; 432 } 433 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 434 } 435 436 #ifdef ENABLE_CLASSIC 437 static int hci_number_free_sco_slots(void){ 438 unsigned int num_sco_packets_sent = 0; 439 btstack_linked_item_t *it; 440 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 441 hci_connection_t * connection = (hci_connection_t *) it; 442 num_sco_packets_sent += connection->num_sco_packets_sent; 443 } 444 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 445 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 446 return 0; 447 } 448 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 449 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 450 } 451 #endif 452 453 // only used to send HCI Host Number Completed Packets 454 static int hci_can_send_comand_packet_transport(void){ 455 if (hci_stack->hci_packet_buffer_reserved) return 0; 456 457 // check for async hci transport implementations 458 if (hci_stack->hci_transport->can_send_packet_now){ 459 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 460 return 0; 461 } 462 } 463 return 1; 464 } 465 466 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 467 int hci_can_send_command_packet_now(void){ 468 if (hci_can_send_comand_packet_transport() == 0) return 0; 469 return hci_stack->num_cmd_packets > 0; 470 } 471 472 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 473 // check for async hci transport implementations 474 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 475 return hci_stack->hci_transport->can_send_packet_now(packet_type); 476 } 477 478 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 479 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 480 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 481 } 482 483 int hci_can_send_acl_le_packet_now(void){ 484 if (hci_stack->hci_packet_buffer_reserved) return 0; 485 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 486 } 487 488 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 489 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 490 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 491 } 492 493 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 494 if (hci_stack->hci_packet_buffer_reserved) return 0; 495 return hci_can_send_prepared_acl_packet_now(con_handle); 496 } 497 498 #ifdef ENABLE_CLASSIC 499 int hci_can_send_acl_classic_packet_now(void){ 500 if (hci_stack->hci_packet_buffer_reserved) return 0; 501 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 502 } 503 504 int hci_can_send_prepared_sco_packet_now(void){ 505 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 506 if (!hci_stack->synchronous_flow_control_enabled) return 1; 507 return hci_number_free_sco_slots() > 0; 508 } 509 510 int hci_can_send_sco_packet_now(void){ 511 if (hci_stack->hci_packet_buffer_reserved) return 0; 512 return hci_can_send_prepared_sco_packet_now(); 513 } 514 515 void hci_request_sco_can_send_now_event(void){ 516 hci_stack->sco_waiting_for_can_send_now = 1; 517 hci_notify_if_sco_can_send_now(); 518 } 519 #endif 520 521 // used for internal checks in l2cap.c 522 int hci_is_packet_buffer_reserved(void){ 523 return hci_stack->hci_packet_buffer_reserved; 524 } 525 526 // reserves outgoing packet buffer. @returns 1 if successful 527 int hci_reserve_packet_buffer(void){ 528 if (hci_stack->hci_packet_buffer_reserved) { 529 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 530 return 0; 531 } 532 hci_stack->hci_packet_buffer_reserved = 1; 533 return 1; 534 } 535 536 void hci_release_packet_buffer(void){ 537 hci_stack->hci_packet_buffer_reserved = 0; 538 } 539 540 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 541 static int hci_transport_synchronous(void){ 542 return hci_stack->hci_transport->can_send_packet_now == NULL; 543 } 544 545 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 546 547 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 548 549 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 550 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 551 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 552 max_acl_data_packet_length = hci_stack->le_data_packets_length; 553 } 554 555 // testing: reduce buffer to minimum 556 // max_acl_data_packet_length = 52; 557 558 log_debug("hci_send_acl_packet_fragments entered"); 559 560 int err; 561 // multiple packets could be send on a synchronous HCI transport 562 while (1){ 563 564 log_debug("hci_send_acl_packet_fragments loop entered"); 565 566 // get current data 567 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 568 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 569 int more_fragments = 0; 570 571 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 572 if (current_acl_data_packet_length > max_acl_data_packet_length){ 573 more_fragments = 1; 574 current_acl_data_packet_length = max_acl_data_packet_length; 575 } 576 577 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 578 if (acl_header_pos > 0){ 579 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 580 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 581 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 582 } 583 584 // update header len 585 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 586 587 // count packet 588 connection->num_acl_packets_sent++; 589 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 590 591 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 592 if (more_fragments){ 593 // update start of next fragment to send 594 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 595 } else { 596 // done 597 hci_stack->acl_fragmentation_pos = 0; 598 hci_stack->acl_fragmentation_total_size = 0; 599 } 600 601 // send packet 602 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 603 const int size = current_acl_data_packet_length + 4; 604 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 605 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 606 607 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 608 609 // done yet? 610 if (!more_fragments) break; 611 612 // can send more? 613 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 614 } 615 616 log_debug("hci_send_acl_packet_fragments loop over"); 617 618 // release buffer now for synchronous transport 619 if (hci_transport_synchronous()){ 620 hci_release_packet_buffer(); 621 // notify upper stack that it might be possible to send again 622 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 623 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 624 } 625 626 return err; 627 } 628 629 // pre: caller has reserved the packet buffer 630 int hci_send_acl_packet_buffer(int size){ 631 632 // log_info("hci_send_acl_packet_buffer size %u", size); 633 634 if (!hci_stack->hci_packet_buffer_reserved) { 635 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 636 return 0; 637 } 638 639 uint8_t * packet = hci_stack->hci_packet_buffer; 640 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 641 642 // check for free places on Bluetooth module 643 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 644 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 645 hci_release_packet_buffer(); 646 return BTSTACK_ACL_BUFFERS_FULL; 647 } 648 649 hci_connection_t *connection = hci_connection_for_handle( con_handle); 650 if (!connection) { 651 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 652 hci_release_packet_buffer(); 653 return 0; 654 } 655 656 #ifdef ENABLE_CLASSIC 657 hci_connection_timestamp(connection); 658 #endif 659 660 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 661 662 // setup data 663 hci_stack->acl_fragmentation_total_size = size; 664 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 665 666 return hci_send_acl_packet_fragments(connection); 667 } 668 669 #ifdef ENABLE_CLASSIC 670 // pre: caller has reserved the packet buffer 671 int hci_send_sco_packet_buffer(int size){ 672 673 // log_info("hci_send_acl_packet_buffer size %u", size); 674 675 if (!hci_stack->hci_packet_buffer_reserved) { 676 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 677 return 0; 678 } 679 680 uint8_t * packet = hci_stack->hci_packet_buffer; 681 682 // skip checks in loopback mode 683 if (!hci_stack->loopback_mode){ 684 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 685 686 // check for free places on Bluetooth module 687 if (!hci_can_send_prepared_sco_packet_now()) { 688 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 689 hci_release_packet_buffer(); 690 return BTSTACK_ACL_BUFFERS_FULL; 691 } 692 693 // track send packet in connection struct 694 hci_connection_t *connection = hci_connection_for_handle( con_handle); 695 if (!connection) { 696 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 697 hci_release_packet_buffer(); 698 return 0; 699 } 700 connection->num_sco_packets_sent++; 701 } 702 703 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 704 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 705 706 if (hci_transport_synchronous()){ 707 hci_release_packet_buffer(); 708 // notify upper stack that it might be possible to send again 709 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 710 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 711 } 712 713 return err; 714 } 715 #endif 716 717 static void acl_handler(uint8_t *packet, int size){ 718 719 // log_info("acl_handler: size %u", size); 720 721 // get info 722 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 723 hci_connection_t *conn = hci_connection_for_handle(con_handle); 724 uint8_t acl_flags = READ_ACL_FLAGS(packet); 725 uint16_t acl_length = READ_ACL_LENGTH(packet); 726 727 // ignore non-registered handle 728 if (!conn){ 729 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 730 return; 731 } 732 733 // assert packet is complete 734 if (acl_length + 4 != size){ 735 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 736 return; 737 } 738 739 #ifdef ENABLE_CLASSIC 740 // update idle timestamp 741 hci_connection_timestamp(conn); 742 #endif 743 744 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 745 hci_stack->host_completed_packets = 1; 746 conn->num_packets_completed++; 747 #endif 748 749 // handle different packet types 750 switch (acl_flags & 0x03) { 751 752 case 0x01: // continuation fragment 753 754 // sanity checks 755 if (conn->acl_recombination_pos == 0) { 756 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 757 return; 758 } 759 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 760 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 761 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 762 conn->acl_recombination_pos = 0; 763 return; 764 } 765 766 // append fragment payload (header already stored) 767 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 768 conn->acl_recombination_pos += acl_length; 769 770 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 771 // conn->acl_recombination_pos, conn->acl_recombination_length); 772 773 // forward complete L2CAP packet if complete. 774 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 775 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 776 // reset recombination buffer 777 conn->acl_recombination_length = 0; 778 conn->acl_recombination_pos = 0; 779 } 780 break; 781 782 case 0x02: { // first fragment 783 784 // sanity check 785 if (conn->acl_recombination_pos) { 786 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 787 conn->acl_recombination_pos = 0; 788 } 789 790 // peek into L2CAP packet! 791 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 792 793 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 794 795 // compare fragment size to L2CAP packet size 796 if (acl_length >= l2cap_length + 4){ 797 // forward fragment as L2CAP packet 798 hci_emit_acl_packet(packet, acl_length + 4); 799 } else { 800 801 if (acl_length > HCI_ACL_BUFFER_SIZE){ 802 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 803 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 804 return; 805 } 806 807 // store first fragment and tweak acl length for complete package 808 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 809 conn->acl_recombination_pos = acl_length + 4; 810 conn->acl_recombination_length = l2cap_length; 811 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 812 } 813 break; 814 815 } 816 default: 817 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 818 return; 819 } 820 821 // execute main loop 822 hci_run(); 823 } 824 825 static void hci_shutdown_connection(hci_connection_t *conn){ 826 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 827 828 #ifdef ENABLE_CLASSIC 829 #ifdef ENABLE_SCO_OVER_HCI 830 int addr_type = conn->address_type; 831 #endif 832 #endif 833 834 btstack_run_loop_remove_timer(&conn->timeout); 835 836 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 837 btstack_memory_hci_connection_free( conn ); 838 839 // now it's gone 840 hci_emit_nr_connections_changed(); 841 842 #ifdef ENABLE_CLASSIC 843 #ifdef ENABLE_SCO_OVER_HCI 844 // update SCO 845 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 846 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 847 } 848 #endif 849 #endif 850 } 851 852 #ifdef ENABLE_CLASSIC 853 854 static const uint16_t packet_type_sizes[] = { 855 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 856 HCI_ACL_DH1_SIZE, 0, 0, 0, 857 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 858 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 859 }; 860 static const uint8_t packet_type_feature_requirement_bit[] = { 861 0, // 3 slot packets 862 1, // 5 slot packets 863 25, // EDR 2 mpbs 864 26, // EDR 3 mbps 865 39, // 3 slot EDR packts 866 40, // 5 slot EDR packet 867 }; 868 static const uint16_t packet_type_feature_packet_mask[] = { 869 0x0f00, // 3 slot packets 870 0xf000, // 5 slot packets 871 0x1102, // EDR 2 mpbs 872 0x2204, // EDR 3 mbps 873 0x0300, // 3 slot EDR packts 874 0x3000, // 5 slot EDR packet 875 }; 876 877 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 878 // enable packet types based on size 879 uint16_t packet_types = 0; 880 unsigned int i; 881 for (i=0;i<16;i++){ 882 if (packet_type_sizes[i] == 0) continue; 883 if (packet_type_sizes[i] <= buffer_size){ 884 packet_types |= 1 << i; 885 } 886 } 887 // disable packet types due to missing local supported features 888 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 889 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 890 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 891 if (feature_set) continue; 892 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 893 packet_types &= ~packet_type_feature_packet_mask[i]; 894 } 895 // flip bits for "may not be used" 896 packet_types ^= 0x3306; 897 return packet_types; 898 } 899 900 uint16_t hci_usable_acl_packet_types(void){ 901 return hci_stack->packet_types; 902 } 903 #endif 904 905 uint8_t* hci_get_outgoing_packet_buffer(void){ 906 // hci packet buffer is >= acl data packet length 907 return hci_stack->hci_packet_buffer; 908 } 909 910 uint16_t hci_max_acl_data_packet_length(void){ 911 return hci_stack->acl_data_packet_length; 912 } 913 914 #ifdef ENABLE_CLASSIC 915 int hci_extended_sco_link_supported(void){ 916 // No. 31, byte 3, bit 7 917 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 918 } 919 #endif 920 921 int hci_non_flushable_packet_boundary_flag_supported(void){ 922 // No. 54, byte 6, bit 6 923 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 924 } 925 926 static int gap_ssp_supported(void){ 927 // No. 51, byte 6, bit 3 928 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 929 } 930 931 static int hci_classic_supported(void){ 932 #ifdef ENABLE_CLASSIC 933 // No. 37, byte 4, bit 5, = No BR/EDR Support 934 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 935 #else 936 return 0; 937 #endif 938 } 939 940 static int hci_le_supported(void){ 941 #ifdef ENABLE_BLE 942 // No. 37, byte 4, bit 6 = LE Supported (Controller) 943 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 944 #else 945 return 0; 946 #endif 947 } 948 949 #ifdef ENABLE_BLE 950 951 /** 952 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 953 */ 954 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 955 *addr_type = hci_stack->le_own_addr_type; 956 if (hci_stack->le_own_addr_type){ 957 memcpy(addr, hci_stack->le_random_address, 6); 958 } else { 959 memcpy(addr, hci_stack->local_bd_addr, 6); 960 } 961 } 962 963 #ifdef ENABLE_LE_CENTRAL 964 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 965 966 int offset = 3; 967 int num_reports = packet[offset]; 968 offset += 1; 969 970 int i; 971 // log_info("HCI: handle adv report with num reports: %d", num_reports); 972 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 973 for (i=0; i<num_reports && offset < size;i++){ 974 uint8_t data_length = btstack_min( packet[offset + 8], LE_ADVERTISING_DATA_SIZE); 975 uint8_t event_size = 10 + data_length; 976 int pos = 0; 977 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 978 event[pos++] = event_size; 979 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 980 offset += 8; 981 pos += 8; 982 event[pos++] = packet[offset + 1 + data_length]; // rssi 983 event[pos++] = packet[offset++]; //data_length; 984 memcpy(&event[pos], &packet[offset], data_length); 985 pos += data_length; 986 offset += data_length + 1; // rssi 987 hci_emit_event(event, pos, 1); 988 } 989 } 990 #endif 991 #endif 992 993 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 994 995 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 996 if (!hci_stack->config) return 0; 997 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 998 // Limit baud rate for Broadcom chipsets to 3 mbps 999 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1000 baud_rate = 3000000; 1001 } 1002 return baud_rate; 1003 } 1004 1005 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1006 UNUSED(ds); 1007 1008 switch (hci_stack->substate){ 1009 case HCI_INIT_W4_SEND_RESET: 1010 log_info("Resend HCI Reset"); 1011 hci_stack->substate = HCI_INIT_SEND_RESET; 1012 hci_stack->num_cmd_packets = 1; 1013 hci_run(); 1014 break; 1015 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1016 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1017 if (hci_stack->hci_transport->reset_link){ 1018 hci_stack->hci_transport->reset_link(); 1019 } 1020 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1021 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1022 log_info("Resend HCI Reset - CSR Warm Boot"); 1023 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1024 hci_stack->num_cmd_packets = 1; 1025 hci_run(); 1026 break; 1027 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1028 if (hci_stack->hci_transport->set_baudrate){ 1029 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1030 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1031 hci_stack->hci_transport->set_baudrate(baud_rate); 1032 } 1033 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1034 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1035 if (hci_stack->hci_transport->reset_link){ 1036 log_info("Link Reset"); 1037 hci_stack->hci_transport->reset_link(); 1038 } 1039 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1040 hci_run(); 1041 } 1042 break; 1043 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1044 // otherwise continue 1045 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1046 hci_send_cmd(&hci_read_local_supported_commands); 1047 break; 1048 default: 1049 break; 1050 } 1051 } 1052 #endif 1053 1054 static void hci_initializing_next_state(void){ 1055 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1056 } 1057 1058 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1059 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1060 const int bd_addr_string_len = 17; 1061 int i = 0; 1062 while (i < size - bd_addr_string_len){ 1063 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1064 i++; 1065 continue; 1066 } 1067 // set real address 1068 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1069 i += bd_addr_string_len; 1070 } 1071 } 1072 #endif 1073 1074 // assumption: hci_can_send_command_packet_now() == true 1075 static void hci_initializing_run(void){ 1076 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1077 switch (hci_stack->substate){ 1078 case HCI_INIT_SEND_RESET: 1079 hci_state_reset(); 1080 1081 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1082 // prepare reset if command complete not received in 100ms 1083 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1084 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1085 btstack_run_loop_add_timer(&hci_stack->timeout); 1086 #endif 1087 // send command 1088 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1089 hci_send_cmd(&hci_reset); 1090 break; 1091 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1092 hci_send_cmd(&hci_read_local_version_information); 1093 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1094 break; 1095 case HCI_INIT_SEND_READ_LOCAL_NAME: 1096 hci_send_cmd(&hci_read_local_name); 1097 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1098 break; 1099 1100 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1101 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1102 hci_state_reset(); 1103 // prepare reset if command complete not received in 100ms 1104 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1105 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1106 btstack_run_loop_add_timer(&hci_stack->timeout); 1107 // send command 1108 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1109 hci_send_cmd(&hci_reset); 1110 break; 1111 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1112 hci_state_reset(); 1113 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1114 hci_send_cmd(&hci_reset); 1115 break; 1116 case HCI_INIT_SEND_BAUD_CHANGE: { 1117 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1118 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1119 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1120 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1121 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1122 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1123 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1124 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1125 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1126 btstack_run_loop_add_timer(&hci_stack->timeout); 1127 } 1128 break; 1129 } 1130 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1131 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1132 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1133 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1134 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1135 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1136 break; 1137 } 1138 case HCI_INIT_CUSTOM_INIT: 1139 // Custom initialization 1140 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1141 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1142 if (valid_cmd){ 1143 int size = 3 + hci_stack->hci_packet_buffer[2]; 1144 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1145 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1146 switch (valid_cmd) { 1147 case BTSTACK_CHIPSET_VALID_COMMAND: 1148 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1149 break; 1150 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1151 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1152 log_info("CSR Warm Boot"); 1153 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1154 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1155 btstack_run_loop_add_timer(&hci_stack->timeout); 1156 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1157 && hci_stack->config 1158 && hci_stack->chipset 1159 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1160 && hci_stack->hci_transport->set_baudrate 1161 && hci_transport_uart_get_main_baud_rate()){ 1162 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1163 } else { 1164 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1165 } 1166 break; 1167 default: 1168 // should not get here 1169 break; 1170 } 1171 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1172 break; 1173 } 1174 log_info("Init script done"); 1175 1176 // Init script download on Broadcom chipsets causes: 1177 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1178 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA){ 1179 1180 // - baud rate to reset, restore UART baud rate if needed 1181 int need_baud_change = hci_stack->config 1182 && hci_stack->chipset 1183 && hci_stack->chipset->set_baudrate_command 1184 && hci_stack->hci_transport->set_baudrate 1185 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1186 if (need_baud_change) { 1187 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1188 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1189 hci_stack->hci_transport->set_baudrate(baud_rate); 1190 } 1191 1192 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1193 // -> Work around: wait a few milliseconds here. 1194 log_info("BCM delay after init script"); 1195 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1196 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1197 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1198 btstack_run_loop_add_timer(&hci_stack->timeout); 1199 break; 1200 } 1201 } 1202 // otherwise continue 1203 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1204 hci_send_cmd(&hci_read_local_supported_commands); 1205 break; 1206 case HCI_INIT_SET_BD_ADDR: 1207 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1208 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1209 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1210 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1211 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1212 break; 1213 #endif 1214 1215 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1216 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1217 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1218 hci_send_cmd(&hci_read_local_supported_commands); 1219 break; 1220 case HCI_INIT_READ_BD_ADDR: 1221 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1222 hci_send_cmd(&hci_read_bd_addr); 1223 break; 1224 case HCI_INIT_READ_BUFFER_SIZE: 1225 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1226 hci_send_cmd(&hci_read_buffer_size); 1227 break; 1228 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1229 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1230 hci_send_cmd(&hci_read_local_supported_features); 1231 break; 1232 1233 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1234 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1235 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1236 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1237 break; 1238 case HCI_INIT_HOST_BUFFER_SIZE: 1239 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1240 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1241 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1242 break; 1243 #endif 1244 1245 case HCI_INIT_SET_EVENT_MASK: 1246 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1247 if (hci_le_supported()){ 1248 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1249 } else { 1250 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1251 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1252 } 1253 break; 1254 1255 #ifdef ENABLE_CLASSIC 1256 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1257 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1258 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1259 break; 1260 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1261 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1262 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1263 break; 1264 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1265 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1266 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1267 break; 1268 case HCI_INIT_WRITE_LOCAL_NAME: { 1269 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1270 hci_reserve_packet_buffer(); 1271 uint8_t * packet = hci_stack->hci_packet_buffer; 1272 // construct HCI Command and send 1273 uint16_t opcode = hci_write_local_name.opcode; 1274 hci_stack->last_cmd_opcode = opcode; 1275 packet[0] = opcode & 0xff; 1276 packet[1] = opcode >> 8; 1277 packet[2] = DEVICE_NAME_LEN; 1278 memset(&packet[3], 0, DEVICE_NAME_LEN); 1279 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1280 // expand '00:00:00:00:00:00' in name with bd_addr 1281 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1282 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1283 break; 1284 } 1285 case HCI_INIT_WRITE_EIR_DATA: { 1286 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1287 hci_reserve_packet_buffer(); 1288 uint8_t * packet = hci_stack->hci_packet_buffer; 1289 // construct HCI Command and send 1290 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1291 hci_stack->last_cmd_opcode = opcode; 1292 packet[0] = opcode & 0xff; 1293 packet[1] = opcode >> 8; 1294 packet[2] = 1 + 240; 1295 packet[3] = 0; // FEC not required 1296 if (hci_stack->eir_data){ 1297 memcpy(&packet[4], hci_stack->eir_data, 240); 1298 } else { 1299 memset(&packet[4], 0, 240); 1300 int name_len = strlen(hci_stack->local_name); 1301 packet[4] = name_len + 1; 1302 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1303 memcpy(&packet[6], hci_stack->local_name, name_len); 1304 } 1305 // expand '00:00:00:00:00:00' in name with bd_addr 1306 hci_replace_bd_addr_placeholder(&packet[4], 240); 1307 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1308 break; 1309 } 1310 case HCI_INIT_WRITE_INQUIRY_MODE: 1311 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1312 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1313 break; 1314 case HCI_INIT_WRITE_SCAN_ENABLE: 1315 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1316 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1317 break; 1318 // only sent if ENABLE_SCO_OVER_HCI is defined 1319 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1320 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1321 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1322 break; 1323 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1324 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1325 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1326 break; 1327 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1328 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1329 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1330 log_info("BCM: Route SCO data via HCI transport"); 1331 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1332 break; 1333 1334 #endif 1335 #ifdef ENABLE_BLE 1336 // LE INIT 1337 case HCI_INIT_LE_READ_BUFFER_SIZE: 1338 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1339 hci_send_cmd(&hci_le_read_buffer_size); 1340 break; 1341 case HCI_INIT_LE_SET_EVENT_MASK: 1342 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1343 hci_send_cmd(&hci_le_set_event_mask, 0x1FF, 0x0); 1344 break; 1345 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1346 // LE Supported Host = 1, Simultaneous Host = 0 1347 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1348 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1349 break; 1350 #endif 1351 1352 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1353 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1354 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1355 hci_send_cmd(&hci_le_read_maximum_data_length); 1356 break; 1357 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1358 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1359 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1360 break; 1361 #endif 1362 1363 #ifdef ENABLE_LE_CENTRAL 1364 case HCI_INIT_READ_WHITE_LIST_SIZE: 1365 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1366 hci_send_cmd(&hci_le_read_white_list_size); 1367 break; 1368 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1369 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1370 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1371 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1372 break; 1373 #endif 1374 default: 1375 return; 1376 } 1377 } 1378 1379 static void hci_init_done(void){ 1380 // done. tell the app 1381 log_info("hci_init_done -> HCI_STATE_WORKING"); 1382 hci_stack->state = HCI_STATE_WORKING; 1383 hci_emit_state(); 1384 hci_run(); 1385 } 1386 1387 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1388 1389 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1390 1391 uint8_t command_completed = 0; 1392 1393 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1394 uint16_t opcode = little_endian_read_16(packet,3); 1395 if (opcode == hci_stack->last_cmd_opcode){ 1396 command_completed = 1; 1397 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1398 } else { 1399 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1400 } 1401 } 1402 1403 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1404 uint8_t status = packet[2]; 1405 uint16_t opcode = little_endian_read_16(packet,4); 1406 if (opcode == hci_stack->last_cmd_opcode){ 1407 if (status){ 1408 command_completed = 1; 1409 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1410 } else { 1411 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1412 } 1413 } else { 1414 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1415 } 1416 } 1417 1418 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1419 1420 // Vendor == CSR 1421 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1422 // TODO: track actual command 1423 command_completed = 1; 1424 } 1425 1426 // Vendor == Toshiba 1427 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1428 // TODO: track actual command 1429 command_completed = 1; 1430 } 1431 1432 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1433 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1434 // 1435 // HCI Reset 1436 // Timeout 100 ms 1437 // HCI Reset 1438 // Command Complete Reset 1439 // HCI Read Local Version Information 1440 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1441 // hang... 1442 // 1443 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1444 if (!command_completed 1445 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1446 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1447 1448 uint16_t opcode = little_endian_read_16(packet,3); 1449 if (opcode == hci_reset.opcode){ 1450 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1451 return; 1452 } 1453 } 1454 1455 // CSR & H5 1456 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1457 if (!command_completed 1458 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1459 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1460 1461 uint16_t opcode = little_endian_read_16(packet,3); 1462 if (opcode == hci_reset.opcode){ 1463 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1464 return; 1465 } 1466 } 1467 1468 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1469 // fix: Correct substate and behave as command below 1470 if (command_completed){ 1471 switch (hci_stack->substate){ 1472 case HCI_INIT_SEND_RESET: 1473 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1474 break; 1475 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1476 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1477 break; 1478 default: 1479 break; 1480 } 1481 } 1482 1483 #endif 1484 1485 if (!command_completed) return; 1486 1487 int need_baud_change = 0; 1488 int need_addr_change = 0; 1489 1490 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1491 need_baud_change = hci_stack->config 1492 && hci_stack->chipset 1493 && hci_stack->chipset->set_baudrate_command 1494 && hci_stack->hci_transport->set_baudrate 1495 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1496 1497 need_addr_change = hci_stack->custom_bd_addr_set 1498 && hci_stack->chipset 1499 && hci_stack->chipset->set_bd_addr_command; 1500 #endif 1501 1502 switch(hci_stack->substate){ 1503 1504 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1505 case HCI_INIT_SEND_RESET: 1506 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1507 // fix: just correct substate and behave as command below 1508 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1509 btstack_run_loop_remove_timer(&hci_stack->timeout); 1510 break; 1511 case HCI_INIT_W4_SEND_RESET: 1512 btstack_run_loop_remove_timer(&hci_stack->timeout); 1513 break; 1514 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1515 log_info("Received local name, need baud change %d", need_baud_change); 1516 if (need_baud_change){ 1517 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1518 return; 1519 } 1520 // skip baud change 1521 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1522 return; 1523 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1524 // for STLC2500D, baud rate change already happened. 1525 // for others, baud rate gets changed now 1526 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1527 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1528 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1529 hci_stack->hci_transport->set_baudrate(baud_rate); 1530 } 1531 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1532 return; 1533 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1534 btstack_run_loop_remove_timer(&hci_stack->timeout); 1535 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1536 return; 1537 case HCI_INIT_W4_CUSTOM_INIT: 1538 // repeat custom init 1539 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1540 return; 1541 #else 1542 case HCI_INIT_W4_SEND_RESET: 1543 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1544 return ; 1545 #endif 1546 1547 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1548 if (need_baud_change && 1549 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1550 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1551 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1552 return; 1553 } 1554 if (need_addr_change){ 1555 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1556 return; 1557 } 1558 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1559 return; 1560 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1561 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1562 if (need_baud_change){ 1563 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1564 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1565 hci_stack->hci_transport->set_baudrate(baud_rate); 1566 } 1567 if (need_addr_change){ 1568 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1569 return; 1570 } 1571 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1572 return; 1573 case HCI_INIT_W4_SET_BD_ADDR: 1574 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1575 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1576 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1577 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1578 return; 1579 } 1580 // skipping st warm boot 1581 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1582 return; 1583 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1584 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1585 return; 1586 #endif 1587 case HCI_INIT_W4_READ_BD_ADDR: 1588 // only read buffer size if supported 1589 if (hci_stack->local_supported_commands[0] & 0x01) { 1590 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1591 return; 1592 } 1593 // skipping read buffer size 1594 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1595 return; 1596 case HCI_INIT_W4_SET_EVENT_MASK: 1597 // skip Classic init commands for LE only chipsets 1598 if (!hci_classic_supported()){ 1599 #ifdef ENABLE_BLE 1600 if (hci_le_supported()){ 1601 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1602 return; 1603 } 1604 #endif 1605 log_error("Neither BR/EDR nor LE supported"); 1606 hci_init_done(); 1607 return; 1608 } 1609 if (!gap_ssp_supported()){ 1610 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1611 return; 1612 } 1613 break; 1614 #ifdef ENABLE_BLE 1615 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1616 // skip write le host if not supported (e.g. on LE only EM9301) 1617 if (hci_stack->local_supported_commands[0] & 0x02) break; 1618 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1619 return; 1620 1621 1622 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1623 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1624 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1625 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1626 return; 1627 } 1628 // explicit fall through to reduce repetitions 1629 #endif 1630 1631 #ifdef ENABLE_LE_CENTRAL 1632 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1633 #else 1634 hci_init_done(); 1635 #endif 1636 return; 1637 #endif 1638 1639 #ifdef ENABLE_SCO_OVER_HCI 1640 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1641 // skip write synchronous flow control if not supported 1642 if (hci_stack->local_supported_commands[0] & 0x04) break; 1643 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1644 // explicit fall through to reduce repetitions 1645 1646 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1647 // skip write default erroneous data reporting if not supported 1648 if (hci_stack->local_supported_commands[0] & 0x08) break; 1649 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1650 // explicit fall through to reduce repetitions 1651 1652 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1653 // skip bcm set sco pcm config on non-Broadcom chipsets 1654 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1655 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1656 // explicit fall through to reduce repetitions 1657 1658 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1659 if (!hci_le_supported()){ 1660 // SKIP LE init for Classic only configuration 1661 hci_init_done(); 1662 return; 1663 } 1664 break; 1665 1666 #else /* !ENABLE_SCO_OVER_HCI */ 1667 1668 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1669 #ifdef ENABLE_BLE 1670 if (hci_le_supported()){ 1671 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1672 return; 1673 } 1674 #endif 1675 // SKIP LE init for Classic only configuration 1676 hci_init_done(); 1677 return; 1678 #endif /* ENABLE_SCO_OVER_HCI */ 1679 1680 // Response to command before init done state -> init done 1681 case (HCI_INIT_DONE-1): 1682 hci_init_done(); 1683 return; 1684 1685 default: 1686 break; 1687 } 1688 hci_initializing_next_state(); 1689 } 1690 1691 static void event_handler(uint8_t *packet, int size){ 1692 1693 uint16_t event_length = packet[1]; 1694 1695 // assert packet is complete 1696 if (size != event_length + 2){ 1697 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1698 return; 1699 } 1700 1701 bd_addr_t addr; 1702 bd_addr_type_t addr_type; 1703 hci_con_handle_t handle; 1704 hci_connection_t * conn; 1705 int i; 1706 #ifdef ENABLE_CLASSIC 1707 uint8_t link_type; 1708 #endif 1709 1710 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1711 1712 switch (hci_event_packet_get_type(packet)) { 1713 1714 case HCI_EVENT_COMMAND_COMPLETE: 1715 // get num cmd packets - limit to 1 to reduce complexity 1716 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1717 1718 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1719 if (packet[5]) break; 1720 // terminate, name 248 chars 1721 packet[6+248] = 0; 1722 log_info("local name: %s", &packet[6]); 1723 } 1724 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1725 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1726 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1727 uint16_t acl_len = little_endian_read_16(packet, 6); 1728 uint16_t sco_len = packet[8]; 1729 1730 // determine usable ACL/SCO payload size 1731 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1732 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1733 1734 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1735 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1736 1737 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1738 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1739 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1740 } 1741 } 1742 #ifdef ENABLE_BLE 1743 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1744 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1745 hci_stack->le_acl_packets_total_num = packet[8]; 1746 // determine usable ACL payload size 1747 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1748 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1749 } 1750 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1751 } 1752 #endif 1753 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1754 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1755 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1756 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1757 log_info("hci_le_read_maximum_data_length: tx octets %u, tx time %u us", hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1758 } 1759 #endif 1760 #ifdef ENABLE_LE_CENTRAL 1761 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1762 hci_stack->le_whitelist_capacity = packet[6]; 1763 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1764 } 1765 #endif 1766 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1767 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1768 hci_stack->local_bd_addr); 1769 log_info("Local Address, Status: 0x%02x: Addr: %s", 1770 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1771 #ifdef ENABLE_CLASSIC 1772 if (hci_stack->link_key_db){ 1773 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1774 } 1775 #endif 1776 } 1777 #ifdef ENABLE_CLASSIC 1778 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1779 hci_emit_discoverable_enabled(hci_stack->discoverable); 1780 } 1781 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1782 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1783 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1784 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1785 hci_emit_event(event, sizeof(event), 1); 1786 } 1787 } 1788 #endif 1789 1790 // Note: HCI init checks 1791 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1792 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1793 1794 #ifdef ENABLE_CLASSIC 1795 // determine usable ACL packet types based on host buffer size and supported features 1796 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1797 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1798 #endif 1799 // Classic/LE 1800 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1801 } 1802 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1803 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1804 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1805 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1806 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1807 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1808 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1809 } 1810 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1811 hci_stack->local_supported_commands[0] = 1812 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1813 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1814 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1815 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1816 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1817 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1818 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1819 } 1820 #ifdef ENABLE_CLASSIC 1821 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1822 if (packet[5] == 0){ 1823 hci_stack->synchronous_flow_control_enabled = 1; 1824 } 1825 } 1826 #endif 1827 break; 1828 1829 case HCI_EVENT_COMMAND_STATUS: 1830 // get num cmd packets - limit to 1 to reduce complexity 1831 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1832 break; 1833 1834 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1835 int offset = 3; 1836 for (i=0; i<packet[2];i++){ 1837 handle = little_endian_read_16(packet, offset); 1838 offset += 2; 1839 uint16_t num_packets = little_endian_read_16(packet, offset); 1840 offset += 2; 1841 1842 conn = hci_connection_for_handle(handle); 1843 if (!conn){ 1844 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1845 continue; 1846 } 1847 1848 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1849 #ifdef ENABLE_CLASSIC 1850 if (conn->num_sco_packets_sent >= num_packets){ 1851 conn->num_sco_packets_sent -= num_packets; 1852 } else { 1853 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1854 conn->num_sco_packets_sent = 0; 1855 } 1856 hci_notify_if_sco_can_send_now(); 1857 #endif 1858 } else { 1859 if (conn->num_acl_packets_sent >= num_packets){ 1860 conn->num_acl_packets_sent -= num_packets; 1861 } else { 1862 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1863 conn->num_acl_packets_sent = 0; 1864 } 1865 } 1866 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1867 } 1868 break; 1869 } 1870 1871 #ifdef ENABLE_CLASSIC 1872 case HCI_EVENT_INQUIRY_COMPLETE: 1873 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 1874 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1875 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1876 hci_emit_event(event, sizeof(event), 1); 1877 } 1878 break; 1879 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1880 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 1881 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 1882 } 1883 break; 1884 case HCI_EVENT_CONNECTION_REQUEST: 1885 reverse_bd_addr(&packet[2], addr); 1886 // TODO: eval COD 8-10 1887 link_type = packet[11]; 1888 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1889 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1890 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1891 if (!conn) { 1892 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1893 } 1894 if (!conn) { 1895 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1896 hci_stack->decline_reason = 0x0d; 1897 bd_addr_copy(hci_stack->decline_addr, addr); 1898 break; 1899 } 1900 conn->role = HCI_ROLE_SLAVE; 1901 conn->state = RECEIVED_CONNECTION_REQUEST; 1902 // store info about eSCO 1903 if (link_type == 0x02){ 1904 conn->remote_supported_feature_eSCO = 1; 1905 } 1906 hci_run(); 1907 break; 1908 1909 case HCI_EVENT_CONNECTION_COMPLETE: 1910 // Connection management 1911 reverse_bd_addr(&packet[5], addr); 1912 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1913 addr_type = BD_ADDR_TYPE_CLASSIC; 1914 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1915 if (conn) { 1916 if (!packet[2]){ 1917 conn->state = OPEN; 1918 conn->con_handle = little_endian_read_16(packet, 3); 1919 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1920 1921 // restart timer 1922 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1923 btstack_run_loop_add_timer(&conn->timeout); 1924 1925 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1926 1927 hci_emit_nr_connections_changed(); 1928 } else { 1929 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1930 uint8_t status = packet[2]; 1931 bd_addr_t bd_address; 1932 memcpy(&bd_address, conn->address, 6); 1933 1934 // connection failed, remove entry 1935 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1936 btstack_memory_hci_connection_free( conn ); 1937 1938 // notify client if dedicated bonding 1939 if (notify_dedicated_bonding_failed){ 1940 log_info("hci notify_dedicated_bonding_failed"); 1941 hci_emit_dedicated_bonding_result(bd_address, status); 1942 } 1943 1944 // if authentication error, also delete link key 1945 if (packet[2] == 0x05) { 1946 gap_drop_link_key_for_bd_addr(addr); 1947 } 1948 } 1949 } 1950 break; 1951 1952 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1953 reverse_bd_addr(&packet[5], addr); 1954 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1955 if (packet[2]){ 1956 // connection failed 1957 break; 1958 } 1959 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1960 if (!conn) { 1961 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1962 } 1963 if (!conn) { 1964 break; 1965 } 1966 conn->state = OPEN; 1967 conn->con_handle = little_endian_read_16(packet, 3); 1968 1969 #ifdef ENABLE_SCO_OVER_HCI 1970 // update SCO 1971 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1972 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1973 } 1974 #endif 1975 break; 1976 1977 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1978 handle = little_endian_read_16(packet, 3); 1979 conn = hci_connection_for_handle(handle); 1980 if (!conn) break; 1981 if (!packet[2]){ 1982 uint8_t * features = &packet[5]; 1983 if (features[6] & (1 << 3)){ 1984 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1985 } 1986 if (features[3] & (1<<7)){ 1987 conn->remote_supported_feature_eSCO = 1; 1988 } 1989 } 1990 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1991 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1992 if (conn->bonding_flags & BONDING_DEDICATED){ 1993 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1994 } 1995 break; 1996 1997 case HCI_EVENT_LINK_KEY_REQUEST: 1998 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1999 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2000 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2001 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2002 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2003 hci_run(); 2004 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2005 return; 2006 2007 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2008 reverse_bd_addr(&packet[2], addr); 2009 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2010 if (!conn) break; 2011 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2012 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2013 // Change Connection Encryption keeps link key type 2014 if (link_key_type != CHANGED_COMBINATION_KEY){ 2015 conn->link_key_type = link_key_type; 2016 } 2017 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2018 // still forward event to allow dismiss of pairing dialog 2019 break; 2020 } 2021 2022 case HCI_EVENT_PIN_CODE_REQUEST: 2023 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2024 // non-bondable mode: pin code negative reply will be sent 2025 if (!hci_stack->bondable){ 2026 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2027 hci_run(); 2028 return; 2029 } 2030 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2031 if (!hci_stack->link_key_db) break; 2032 hci_event_pin_code_request_get_bd_addr(packet, addr); 2033 hci_stack->link_key_db->delete_link_key(addr); 2034 break; 2035 2036 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2037 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2038 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2039 break; 2040 2041 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2042 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2043 if (!hci_stack->ssp_auto_accept) break; 2044 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2045 break; 2046 2047 case HCI_EVENT_USER_PASSKEY_REQUEST: 2048 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2049 if (!hci_stack->ssp_auto_accept) break; 2050 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2051 break; 2052 #endif 2053 2054 case HCI_EVENT_ENCRYPTION_CHANGE: 2055 handle = little_endian_read_16(packet, 3); 2056 conn = hci_connection_for_handle(handle); 2057 if (!conn) break; 2058 if (packet[2] == 0) { 2059 if (packet[5]){ 2060 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2061 } else { 2062 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2063 } 2064 } 2065 #ifdef ENABLE_CLASSIC 2066 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2067 #endif 2068 break; 2069 2070 #ifdef ENABLE_CLASSIC 2071 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2072 handle = little_endian_read_16(packet, 3); 2073 conn = hci_connection_for_handle(handle); 2074 if (!conn) break; 2075 2076 // dedicated bonding: send result and disconnect 2077 if (conn->bonding_flags & BONDING_DEDICATED){ 2078 conn->bonding_flags &= ~BONDING_DEDICATED; 2079 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2080 conn->bonding_status = packet[2]; 2081 break; 2082 } 2083 2084 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2085 // link key sufficient for requested security 2086 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2087 break; 2088 } 2089 // not enough 2090 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2091 break; 2092 #endif 2093 2094 // HCI_EVENT_DISCONNECTION_COMPLETE 2095 // has been split, to first notify stack before shutting connection down 2096 // see end of function, too. 2097 case HCI_EVENT_DISCONNECTION_COMPLETE: 2098 if (packet[2]) break; // status != 0 2099 handle = little_endian_read_16(packet, 3); 2100 // drop outgoing ACL fragments if it is for closed connection 2101 if (hci_stack->acl_fragmentation_total_size > 0) { 2102 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2103 log_info("hci: drop fragmented ACL data for closed connection"); 2104 hci_stack->acl_fragmentation_total_size = 0; 2105 hci_stack->acl_fragmentation_pos = 0; 2106 } 2107 } 2108 2109 // re-enable advertisements for le connections if active 2110 conn = hci_connection_for_handle(handle); 2111 if (!conn) break; 2112 #ifdef ENABLE_BLE 2113 #ifdef ENABLE_LE_PERIPHERAL 2114 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 2115 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2116 } 2117 #endif 2118 #endif 2119 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2120 break; 2121 2122 case HCI_EVENT_HARDWARE_ERROR: 2123 log_error("Hardware Error: 0x%02x", packet[2]); 2124 if (hci_stack->hardware_error_callback){ 2125 (*hci_stack->hardware_error_callback)(packet[2]); 2126 } else { 2127 // if no special requests, just reboot stack 2128 hci_power_control_off(); 2129 hci_power_control_on(); 2130 } 2131 break; 2132 2133 #ifdef ENABLE_CLASSIC 2134 case HCI_EVENT_ROLE_CHANGE: 2135 if (packet[2]) break; // status != 0 2136 reverse_bd_addr(&packet[3], addr); 2137 addr_type = BD_ADDR_TYPE_CLASSIC; 2138 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2139 if (!conn) break; 2140 conn->role = packet[9]; 2141 break; 2142 #endif 2143 2144 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2145 // release packet buffer only for asynchronous transport and if there are not further fragements 2146 if (hci_transport_synchronous()) { 2147 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2148 return; // instead of break: to avoid re-entering hci_run() 2149 } 2150 if (hci_stack->acl_fragmentation_total_size) break; 2151 hci_release_packet_buffer(); 2152 2153 // L2CAP receives this event via the hci_emit_event below 2154 2155 #ifdef ENABLE_CLASSIC 2156 // For SCO, we do the can_send_now_check here 2157 hci_notify_if_sco_can_send_now(); 2158 #endif 2159 break; 2160 2161 #ifdef ENABLE_CLASSIC 2162 case HCI_EVENT_SCO_CAN_SEND_NOW: 2163 // For SCO, we do the can_send_now_check here 2164 hci_notify_if_sco_can_send_now(); 2165 return; 2166 2167 // explode inquriy results for easier consumption 2168 case HCI_EVENT_INQUIRY_RESULT: 2169 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2170 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2171 gap_inquiry_explode(packet); 2172 break; 2173 #endif 2174 2175 #ifdef ENABLE_BLE 2176 case HCI_EVENT_LE_META: 2177 switch (packet[2]){ 2178 #ifdef ENABLE_LE_CENTRAL 2179 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2180 // log_info("advertising report received"); 2181 if (hci_stack->le_scanning_state != LE_SCANNING) break; 2182 le_handle_advertisement_report(packet, size); 2183 break; 2184 #endif 2185 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2186 // Connection management 2187 reverse_bd_addr(&packet[8], addr); 2188 addr_type = (bd_addr_type_t)packet[7]; 2189 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2190 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2191 #ifdef ENABLE_LE_CENTRAL 2192 // if auto-connect, remove from whitelist in both roles 2193 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2194 hci_remove_from_whitelist(addr_type, addr); 2195 } 2196 // handle error: error is reported only to the initiator -> outgoing connection 2197 if (packet[3]){ 2198 // outgoing connection establishment is done 2199 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2200 // remove entry 2201 if (conn){ 2202 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2203 btstack_memory_hci_connection_free( conn ); 2204 } 2205 break; 2206 } 2207 #endif 2208 // on success, both hosts receive connection complete event 2209 if (packet[6] == HCI_ROLE_MASTER){ 2210 #ifdef ENABLE_LE_CENTRAL 2211 // if we're master, it was an outgoing connection and we're done with it 2212 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2213 #endif 2214 } else { 2215 #ifdef ENABLE_LE_PERIPHERAL 2216 // if we're slave, it was an incoming connection, advertisements have stopped 2217 hci_stack->le_advertisements_active = 0; 2218 // try to re-enable them 2219 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2220 #endif 2221 } 2222 // LE connections are auto-accepted, so just create a connection if there isn't one already 2223 if (!conn){ 2224 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2225 } 2226 // no memory, sorry. 2227 if (!conn){ 2228 break; 2229 } 2230 2231 conn->state = OPEN; 2232 conn->role = packet[6]; 2233 conn->con_handle = little_endian_read_16(packet, 4); 2234 2235 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2236 2237 // restart timer 2238 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2239 // btstack_run_loop_add_timer(&conn->timeout); 2240 2241 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2242 2243 hci_emit_nr_connections_changed(); 2244 break; 2245 2246 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2247 2248 default: 2249 break; 2250 } 2251 break; 2252 #endif 2253 default: 2254 break; 2255 } 2256 2257 // handle BT initialization 2258 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2259 hci_initializing_event_handler(packet, size); 2260 } 2261 2262 // help with BT sleep 2263 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2264 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2265 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2266 hci_initializing_next_state(); 2267 } 2268 2269 // notify upper stack 2270 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2271 2272 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2273 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2274 if (!packet[2]){ 2275 handle = little_endian_read_16(packet, 3); 2276 hci_connection_t * aConn = hci_connection_for_handle(handle); 2277 if (aConn) { 2278 uint8_t status = aConn->bonding_status; 2279 uint16_t flags = aConn->bonding_flags; 2280 bd_addr_t bd_address; 2281 memcpy(&bd_address, aConn->address, 6); 2282 hci_shutdown_connection(aConn); 2283 // connection struct is gone, don't access anymore 2284 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2285 hci_emit_dedicated_bonding_result(bd_address, status); 2286 } 2287 } 2288 } 2289 } 2290 2291 // execute main loop 2292 hci_run(); 2293 } 2294 2295 #ifdef ENABLE_CLASSIC 2296 static void sco_handler(uint8_t * packet, uint16_t size){ 2297 if (!hci_stack->sco_packet_handler) return; 2298 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2299 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2300 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2301 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2302 if (conn){ 2303 conn->num_packets_completed++; 2304 hci_stack->host_completed_packets = 1; 2305 hci_run(); 2306 } 2307 #endif 2308 } 2309 #endif 2310 2311 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2312 hci_dump_packet(packet_type, 1, packet, size); 2313 switch (packet_type) { 2314 case HCI_EVENT_PACKET: 2315 event_handler(packet, size); 2316 break; 2317 case HCI_ACL_DATA_PACKET: 2318 acl_handler(packet, size); 2319 break; 2320 #ifdef ENABLE_CLASSIC 2321 case HCI_SCO_DATA_PACKET: 2322 sco_handler(packet, size); 2323 break; 2324 #endif 2325 default: 2326 break; 2327 } 2328 } 2329 2330 /** 2331 * @brief Add event packet handler. 2332 */ 2333 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2334 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2335 } 2336 2337 2338 /** Register HCI packet handlers */ 2339 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2340 hci_stack->acl_packet_handler = handler; 2341 } 2342 2343 #ifdef ENABLE_CLASSIC 2344 /** 2345 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2346 */ 2347 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2348 hci_stack->sco_packet_handler = handler; 2349 } 2350 #endif 2351 2352 static void hci_state_reset(void){ 2353 // no connections yet 2354 hci_stack->connections = NULL; 2355 2356 // keep discoverable/connectable as this has been requested by the client(s) 2357 // hci_stack->discoverable = 0; 2358 // hci_stack->connectable = 0; 2359 // hci_stack->bondable = 1; 2360 // hci_stack->own_addr_type = 0; 2361 2362 // buffer is free 2363 hci_stack->hci_packet_buffer_reserved = 0; 2364 2365 // no pending cmds 2366 hci_stack->decline_reason = 0; 2367 hci_stack->new_scan_enable_value = 0xff; 2368 2369 // LE 2370 #ifdef ENABLE_BLE 2371 memset(hci_stack->le_random_address, 0, 6); 2372 hci_stack->le_random_address_set = 0; 2373 #endif 2374 #ifdef ENABLE_LE_CENTRAL 2375 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2376 hci_stack->le_scan_type = 0xff; 2377 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2378 hci_stack->le_whitelist = 0; 2379 hci_stack->le_whitelist_capacity = 0; 2380 #endif 2381 } 2382 2383 #ifdef ENABLE_CLASSIC 2384 /** 2385 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2386 */ 2387 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2388 // store and open remote device db 2389 hci_stack->link_key_db = link_key_db; 2390 if (hci_stack->link_key_db) { 2391 hci_stack->link_key_db->open(); 2392 } 2393 } 2394 #endif 2395 2396 void hci_init(const hci_transport_t *transport, const void *config){ 2397 2398 #ifdef HAVE_MALLOC 2399 if (!hci_stack) { 2400 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2401 } 2402 #else 2403 hci_stack = &hci_stack_static; 2404 #endif 2405 memset(hci_stack, 0, sizeof(hci_stack_t)); 2406 2407 // reference to use transport layer implementation 2408 hci_stack->hci_transport = transport; 2409 2410 // reference to used config 2411 hci_stack->config = config; 2412 2413 // setup pointer for outgoing packet buffer 2414 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2415 2416 // max acl payload size defined in config.h 2417 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2418 2419 // register packet handlers with transport 2420 transport->register_packet_handler(&packet_handler); 2421 2422 hci_stack->state = HCI_STATE_OFF; 2423 2424 // class of device 2425 hci_stack->class_of_device = 0x007a020c; // Smartphone 2426 2427 // bondable by default 2428 hci_stack->bondable = 1; 2429 2430 #ifdef ENABLE_CLASSIC 2431 // classic name 2432 hci_stack->local_name = default_classic_name; 2433 2434 // Master slave policy 2435 hci_stack->master_slave_policy = 1; 2436 #endif 2437 2438 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2439 hci_stack->ssp_enable = 1; 2440 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2441 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2442 hci_stack->ssp_auto_accept = 1; 2443 2444 // voice setting - signed 16 bit pcm data with CVSD over the air 2445 hci_stack->sco_voice_setting = 0x60; 2446 2447 #ifdef ENABLE_LE_CENTRAL 2448 // connection parameter to use for outgoing connections 2449 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2450 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2451 hci_stack->le_connection_latency = 4; // 4 2452 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2453 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2454 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2455 #endif 2456 2457 // connection parameter range used to answer connection parameter update requests in l2cap 2458 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2459 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2460 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2461 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2462 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2463 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2464 2465 hci_state_reset(); 2466 } 2467 2468 /** 2469 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2470 */ 2471 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2472 hci_stack->chipset = chipset_driver; 2473 2474 // reset chipset driver - init is also called on power_up 2475 if (hci_stack->chipset && hci_stack->chipset->init){ 2476 hci_stack->chipset->init(hci_stack->config); 2477 } 2478 } 2479 2480 /** 2481 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2482 */ 2483 void hci_set_control(const btstack_control_t *hardware_control){ 2484 // references to used control implementation 2485 hci_stack->control = hardware_control; 2486 // init with transport config 2487 hardware_control->init(hci_stack->config); 2488 } 2489 2490 void hci_close(void){ 2491 // close remote device db 2492 if (hci_stack->link_key_db) { 2493 hci_stack->link_key_db->close(); 2494 } 2495 2496 btstack_linked_list_iterator_t lit; 2497 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2498 while (btstack_linked_list_iterator_has_next(&lit)){ 2499 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2500 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2501 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2502 hci_shutdown_connection(connection); 2503 } 2504 2505 hci_power_control(HCI_POWER_OFF); 2506 2507 #ifdef HAVE_MALLOC 2508 free(hci_stack); 2509 #endif 2510 hci_stack = NULL; 2511 } 2512 2513 #ifdef ENABLE_CLASSIC 2514 void gap_set_class_of_device(uint32_t class_of_device){ 2515 hci_stack->class_of_device = class_of_device; 2516 } 2517 2518 void hci_disable_l2cap_timeout_check(void){ 2519 disable_l2cap_timeouts = 1; 2520 } 2521 #endif 2522 2523 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2524 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2525 void hci_set_bd_addr(bd_addr_t addr){ 2526 memcpy(hci_stack->custom_bd_addr, addr, 6); 2527 hci_stack->custom_bd_addr_set = 1; 2528 } 2529 #endif 2530 2531 // State-Module-Driver overview 2532 // state module low-level 2533 // HCI_STATE_OFF off close 2534 // HCI_STATE_INITIALIZING, on open 2535 // HCI_STATE_WORKING, on open 2536 // HCI_STATE_HALTING, on open 2537 // HCI_STATE_SLEEPING, off/sleep close 2538 // HCI_STATE_FALLING_ASLEEP on open 2539 2540 static int hci_power_control_on(void){ 2541 2542 // power on 2543 int err = 0; 2544 if (hci_stack->control && hci_stack->control->on){ 2545 err = (*hci_stack->control->on)(); 2546 } 2547 if (err){ 2548 log_error( "POWER_ON failed"); 2549 hci_emit_hci_open_failed(); 2550 return err; 2551 } 2552 2553 // int chipset driver 2554 if (hci_stack->chipset && hci_stack->chipset->init){ 2555 hci_stack->chipset->init(hci_stack->config); 2556 } 2557 2558 // init transport 2559 if (hci_stack->hci_transport->init){ 2560 hci_stack->hci_transport->init(hci_stack->config); 2561 } 2562 2563 // open transport 2564 err = hci_stack->hci_transport->open(); 2565 if (err){ 2566 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2567 if (hci_stack->control && hci_stack->control->off){ 2568 (*hci_stack->control->off)(); 2569 } 2570 hci_emit_hci_open_failed(); 2571 return err; 2572 } 2573 return 0; 2574 } 2575 2576 static void hci_power_control_off(void){ 2577 2578 log_info("hci_power_control_off"); 2579 2580 // close low-level device 2581 hci_stack->hci_transport->close(); 2582 2583 log_info("hci_power_control_off - hci_transport closed"); 2584 2585 // power off 2586 if (hci_stack->control && hci_stack->control->off){ 2587 (*hci_stack->control->off)(); 2588 } 2589 2590 log_info("hci_power_control_off - control closed"); 2591 2592 hci_stack->state = HCI_STATE_OFF; 2593 } 2594 2595 static void hci_power_control_sleep(void){ 2596 2597 log_info("hci_power_control_sleep"); 2598 2599 #if 0 2600 // don't close serial port during sleep 2601 2602 // close low-level device 2603 hci_stack->hci_transport->close(hci_stack->config); 2604 #endif 2605 2606 // sleep mode 2607 if (hci_stack->control && hci_stack->control->sleep){ 2608 (*hci_stack->control->sleep)(); 2609 } 2610 2611 hci_stack->state = HCI_STATE_SLEEPING; 2612 } 2613 2614 static int hci_power_control_wake(void){ 2615 2616 log_info("hci_power_control_wake"); 2617 2618 // wake on 2619 if (hci_stack->control && hci_stack->control->wake){ 2620 (*hci_stack->control->wake)(); 2621 } 2622 2623 #if 0 2624 // open low-level device 2625 int err = hci_stack->hci_transport->open(hci_stack->config); 2626 if (err){ 2627 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2628 if (hci_stack->control && hci_stack->control->off){ 2629 (*hci_stack->control->off)(); 2630 } 2631 hci_emit_hci_open_failed(); 2632 return err; 2633 } 2634 #endif 2635 2636 return 0; 2637 } 2638 2639 static void hci_power_transition_to_initializing(void){ 2640 // set up state machine 2641 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2642 hci_stack->hci_packet_buffer_reserved = 0; 2643 hci_stack->state = HCI_STATE_INITIALIZING; 2644 hci_stack->substate = HCI_INIT_SEND_RESET; 2645 } 2646 2647 int hci_power_control(HCI_POWER_MODE power_mode){ 2648 2649 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2650 2651 int err = 0; 2652 switch (hci_stack->state){ 2653 2654 case HCI_STATE_OFF: 2655 switch (power_mode){ 2656 case HCI_POWER_ON: 2657 err = hci_power_control_on(); 2658 if (err) { 2659 log_error("hci_power_control_on() error %d", err); 2660 return err; 2661 } 2662 hci_power_transition_to_initializing(); 2663 break; 2664 case HCI_POWER_OFF: 2665 // do nothing 2666 break; 2667 case HCI_POWER_SLEEP: 2668 // do nothing (with SLEEP == OFF) 2669 break; 2670 } 2671 break; 2672 2673 case HCI_STATE_INITIALIZING: 2674 switch (power_mode){ 2675 case HCI_POWER_ON: 2676 // do nothing 2677 break; 2678 case HCI_POWER_OFF: 2679 // no connections yet, just turn it off 2680 hci_power_control_off(); 2681 break; 2682 case HCI_POWER_SLEEP: 2683 // no connections yet, just turn it off 2684 hci_power_control_sleep(); 2685 break; 2686 } 2687 break; 2688 2689 case HCI_STATE_WORKING: 2690 switch (power_mode){ 2691 case HCI_POWER_ON: 2692 // do nothing 2693 break; 2694 case HCI_POWER_OFF: 2695 // see hci_run 2696 hci_stack->state = HCI_STATE_HALTING; 2697 break; 2698 case HCI_POWER_SLEEP: 2699 // see hci_run 2700 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2701 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2702 break; 2703 } 2704 break; 2705 2706 case HCI_STATE_HALTING: 2707 switch (power_mode){ 2708 case HCI_POWER_ON: 2709 hci_power_transition_to_initializing(); 2710 break; 2711 case HCI_POWER_OFF: 2712 // do nothing 2713 break; 2714 case HCI_POWER_SLEEP: 2715 // see hci_run 2716 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2717 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2718 break; 2719 } 2720 break; 2721 2722 case HCI_STATE_FALLING_ASLEEP: 2723 switch (power_mode){ 2724 case HCI_POWER_ON: 2725 2726 #ifdef HAVE_PLATFORM_IPHONE_OS 2727 // nothing to do, if H4 supports power management 2728 if (btstack_control_iphone_power_management_enabled()){ 2729 hci_stack->state = HCI_STATE_INITIALIZING; 2730 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2731 break; 2732 } 2733 #endif 2734 hci_power_transition_to_initializing(); 2735 break; 2736 case HCI_POWER_OFF: 2737 // see hci_run 2738 hci_stack->state = HCI_STATE_HALTING; 2739 break; 2740 case HCI_POWER_SLEEP: 2741 // do nothing 2742 break; 2743 } 2744 break; 2745 2746 case HCI_STATE_SLEEPING: 2747 switch (power_mode){ 2748 case HCI_POWER_ON: 2749 2750 #ifdef HAVE_PLATFORM_IPHONE_OS 2751 // nothing to do, if H4 supports power management 2752 if (btstack_control_iphone_power_management_enabled()){ 2753 hci_stack->state = HCI_STATE_INITIALIZING; 2754 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2755 hci_update_scan_enable(); 2756 break; 2757 } 2758 #endif 2759 err = hci_power_control_wake(); 2760 if (err) return err; 2761 hci_power_transition_to_initializing(); 2762 break; 2763 case HCI_POWER_OFF: 2764 hci_stack->state = HCI_STATE_HALTING; 2765 break; 2766 case HCI_POWER_SLEEP: 2767 // do nothing 2768 break; 2769 } 2770 break; 2771 } 2772 2773 // create internal event 2774 hci_emit_state(); 2775 2776 // trigger next/first action 2777 hci_run(); 2778 2779 return 0; 2780 } 2781 2782 2783 #ifdef ENABLE_CLASSIC 2784 2785 static void hci_update_scan_enable(void){ 2786 // 2 = page scan, 1 = inq scan 2787 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2788 hci_run(); 2789 } 2790 2791 void gap_discoverable_control(uint8_t enable){ 2792 if (enable) enable = 1; // normalize argument 2793 2794 if (hci_stack->discoverable == enable){ 2795 hci_emit_discoverable_enabled(hci_stack->discoverable); 2796 return; 2797 } 2798 2799 hci_stack->discoverable = enable; 2800 hci_update_scan_enable(); 2801 } 2802 2803 void gap_connectable_control(uint8_t enable){ 2804 if (enable) enable = 1; // normalize argument 2805 2806 // don't emit event 2807 if (hci_stack->connectable == enable) return; 2808 2809 hci_stack->connectable = enable; 2810 hci_update_scan_enable(); 2811 } 2812 #endif 2813 2814 void gap_local_bd_addr(bd_addr_t address_buffer){ 2815 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2816 } 2817 2818 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2819 static void hci_host_num_completed_packets(void){ 2820 2821 // create packet manually as arrays are not supported and num_commands should not get reduced 2822 hci_reserve_packet_buffer(); 2823 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2824 2825 uint16_t size = 0; 2826 uint16_t num_handles = 0; 2827 packet[size++] = 0x35; 2828 packet[size++] = 0x0c; 2829 size++; // skip param len 2830 size++; // skip num handles 2831 2832 // add { handle, packets } entries 2833 btstack_linked_item_t * it; 2834 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2835 hci_connection_t * connection = (hci_connection_t *) it; 2836 if (connection->num_packets_completed){ 2837 little_endian_store_16(packet, size, connection->con_handle); 2838 size += 2; 2839 little_endian_store_16(packet, size, connection->num_packets_completed); 2840 size += 2; 2841 // 2842 num_handles++; 2843 connection->num_packets_completed = 0; 2844 } 2845 } 2846 2847 packet[2] = size - 3; 2848 packet[3] = num_handles; 2849 2850 hci_stack->host_completed_packets = 0; 2851 2852 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2853 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2854 2855 // release packet buffer for synchronous transport implementations 2856 if (hci_transport_synchronous()){ 2857 hci_stack->hci_packet_buffer_reserved = 0; 2858 } 2859 } 2860 #endif 2861 2862 static void hci_run(void){ 2863 2864 // log_info("hci_run: entered"); 2865 btstack_linked_item_t * it; 2866 2867 // send continuation fragments first, as they block the prepared packet buffer 2868 if (hci_stack->acl_fragmentation_total_size > 0) { 2869 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2870 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2871 if (connection) { 2872 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2873 hci_send_acl_packet_fragments(connection); 2874 return; 2875 } 2876 } else { 2877 // connection gone -> discard further fragments 2878 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2879 hci_stack->acl_fragmentation_total_size = 0; 2880 hci_stack->acl_fragmentation_pos = 0; 2881 } 2882 } 2883 2884 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2885 // send host num completed packets next as they don't require num_cmd_packets > 0 2886 if (!hci_can_send_comand_packet_transport()) return; 2887 if (hci_stack->host_completed_packets){ 2888 hci_host_num_completed_packets(); 2889 return; 2890 } 2891 #endif 2892 2893 if (!hci_can_send_command_packet_now()) return; 2894 2895 // global/non-connection oriented commands 2896 2897 #ifdef ENABLE_CLASSIC 2898 // decline incoming connections 2899 if (hci_stack->decline_reason){ 2900 uint8_t reason = hci_stack->decline_reason; 2901 hci_stack->decline_reason = 0; 2902 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2903 return; 2904 } 2905 // send scan enable 2906 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2907 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2908 hci_stack->new_scan_enable_value = 0xff; 2909 return; 2910 } 2911 // start/stop inquiry 2912 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 2913 uint8_t duration = hci_stack->inquiry_state; 2914 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2915 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 2916 return; 2917 } 2918 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 2919 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 2920 hci_send_cmd(&hci_inquiry_cancel); 2921 return; 2922 } 2923 // remote name request 2924 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 2925 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 2926 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 2927 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 2928 return; 2929 } 2930 // pairing 2931 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 2932 uint8_t state = hci_stack->gap_pairing_state; 2933 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2934 switch (state){ 2935 case GAP_PAIRING_STATE_SEND_PIN: 2936 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, strlen(hci_stack->gap_pairing_pin), hci_stack->gap_pairing_pin); 2937 break; 2938 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 2939 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 2940 break; 2941 case GAP_PAIRING_STATE_SEND_PASSKEY: 2942 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_passkey); 2943 break; 2944 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 2945 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 2946 break; 2947 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 2948 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 2949 break; 2950 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 2951 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 2952 break; 2953 default: 2954 break; 2955 } 2956 return; 2957 } 2958 #endif 2959 2960 #ifdef ENABLE_BLE 2961 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2962 if ((hci_stack->state == HCI_STATE_WORKING) 2963 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2964 2965 #ifdef ENABLE_LE_CENTRAL 2966 // handle le scan 2967 switch(hci_stack->le_scanning_state){ 2968 case LE_START_SCAN: 2969 hci_stack->le_scanning_state = LE_SCANNING; 2970 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2971 return; 2972 2973 case LE_STOP_SCAN: 2974 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2975 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2976 return; 2977 default: 2978 break; 2979 } 2980 if (hci_stack->le_scan_type != 0xff){ 2981 // defaults: active scanning, accept all advertisement packets 2982 int scan_type = hci_stack->le_scan_type; 2983 hci_stack->le_scan_type = 0xff; 2984 hci_send_cmd(&hci_le_set_scan_parameters, scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, 0); 2985 return; 2986 } 2987 #endif 2988 #ifdef ENABLE_LE_PERIPHERAL 2989 // le advertisement control 2990 if (hci_stack->le_advertisements_todo){ 2991 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2992 } 2993 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2994 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2995 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2996 return; 2997 } 2998 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2999 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3000 hci_send_cmd(&hci_le_set_advertising_parameters, 3001 hci_stack->le_advertisements_interval_min, 3002 hci_stack->le_advertisements_interval_max, 3003 hci_stack->le_advertisements_type, 3004 hci_stack->le_own_addr_type, 3005 hci_stack->le_advertisements_direct_address_type, 3006 hci_stack->le_advertisements_direct_address, 3007 hci_stack->le_advertisements_channel_map, 3008 hci_stack->le_advertisements_filter_policy); 3009 return; 3010 } 3011 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3012 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3013 uint8_t adv_data_clean[31]; 3014 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3015 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3016 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3017 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3018 return; 3019 } 3020 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3021 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3022 uint8_t scan_data_clean[31]; 3023 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3024 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3025 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3026 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3027 return; 3028 } 3029 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3030 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3031 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3032 return; 3033 } 3034 #endif 3035 3036 #ifdef ENABLE_LE_CENTRAL 3037 // 3038 // LE Whitelist Management 3039 // 3040 3041 // check if whitelist needs modification 3042 btstack_linked_list_iterator_t lit; 3043 int modification_pending = 0; 3044 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3045 while (btstack_linked_list_iterator_has_next(&lit)){ 3046 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3047 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3048 modification_pending = 1; 3049 break; 3050 } 3051 } 3052 3053 if (modification_pending){ 3054 // stop connnecting if modification pending 3055 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3056 hci_send_cmd(&hci_le_create_connection_cancel); 3057 return; 3058 } 3059 3060 // add/remove entries 3061 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3062 while (btstack_linked_list_iterator_has_next(&lit)){ 3063 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3064 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3065 entry->state = LE_WHITELIST_ON_CONTROLLER; 3066 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3067 return; 3068 3069 } 3070 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3071 bd_addr_t address; 3072 bd_addr_type_t address_type = entry->address_type; 3073 memcpy(address, entry->address, 6); 3074 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3075 btstack_memory_whitelist_entry_free(entry); 3076 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3077 return; 3078 } 3079 } 3080 } 3081 3082 // start connecting 3083 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3084 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3085 bd_addr_t null_addr; 3086 memset(null_addr, 0, 6); 3087 hci_send_cmd(&hci_le_create_connection, 3088 0x0060, // scan interval: 60 ms 3089 0x0030, // scan interval: 30 ms 3090 1, // use whitelist 3091 0, // peer address type 3092 null_addr, // peer bd addr 3093 hci_stack->le_own_addr_type, // our addr type: 3094 hci_stack->le_connection_interval_min, // conn interval min 3095 hci_stack->le_connection_interval_max, // conn interval max 3096 hci_stack->le_connection_latency, // conn latency 3097 hci_stack->le_supervision_timeout, // conn latency 3098 hci_stack->le_minimum_ce_length, // min ce length 3099 hci_stack->le_maximum_ce_length // max ce length 3100 ); 3101 return; 3102 } 3103 #endif 3104 } 3105 #endif 3106 3107 // send pending HCI commands 3108 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3109 hci_connection_t * connection = (hci_connection_t *) it; 3110 3111 switch(connection->state){ 3112 case SEND_CREATE_CONNECTION: 3113 switch(connection->address_type){ 3114 #ifdef ENABLE_CLASSIC 3115 case BD_ADDR_TYPE_CLASSIC: 3116 log_info("sending hci_create_connection"); 3117 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3118 break; 3119 #endif 3120 default: 3121 #ifdef ENABLE_BLE 3122 #ifdef ENABLE_LE_CENTRAL 3123 log_info("sending hci_le_create_connection"); 3124 hci_send_cmd(&hci_le_create_connection, 3125 0x0060, // scan interval: 60 ms 3126 0x0030, // scan interval: 30 ms 3127 0, // don't use whitelist 3128 connection->address_type, // peer address type 3129 connection->address, // peer bd addr 3130 hci_stack->le_own_addr_type, // our addr type: 3131 hci_stack->le_connection_interval_min, // conn interval min 3132 hci_stack->le_connection_interval_max, // conn interval max 3133 hci_stack->le_connection_latency, // conn latency 3134 hci_stack->le_supervision_timeout, // conn latency 3135 hci_stack->le_minimum_ce_length, // min ce length 3136 hci_stack->le_maximum_ce_length // max ce length 3137 ); 3138 connection->state = SENT_CREATE_CONNECTION; 3139 #endif 3140 #endif 3141 break; 3142 } 3143 return; 3144 3145 #ifdef ENABLE_CLASSIC 3146 case RECEIVED_CONNECTION_REQUEST: 3147 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3148 connection->state = ACCEPTED_CONNECTION_REQUEST; 3149 connection->role = HCI_ROLE_SLAVE; 3150 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3151 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3152 } 3153 return; 3154 #endif 3155 3156 #ifdef ENABLE_BLE 3157 #ifdef ENABLE_LE_CENTRAL 3158 case SEND_CANCEL_CONNECTION: 3159 connection->state = SENT_CANCEL_CONNECTION; 3160 hci_send_cmd(&hci_le_create_connection_cancel); 3161 return; 3162 #endif 3163 #endif 3164 case SEND_DISCONNECT: 3165 connection->state = SENT_DISCONNECT; 3166 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3167 return; 3168 3169 default: 3170 break; 3171 } 3172 3173 #ifdef ENABLE_CLASSIC 3174 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3175 log_info("responding to link key request"); 3176 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3177 link_key_t link_key; 3178 link_key_type_t link_key_type; 3179 if ( hci_stack->link_key_db 3180 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3181 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3182 connection->link_key_type = link_key_type; 3183 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3184 } else { 3185 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3186 } 3187 return; 3188 } 3189 3190 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3191 log_info("denying to pin request"); 3192 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3193 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3194 return; 3195 } 3196 3197 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3198 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3199 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3200 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3201 // tweak authentication requirements 3202 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3203 if (connection->bonding_flags & BONDING_DEDICATED){ 3204 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3205 } 3206 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3207 authreq |= 1; 3208 } 3209 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3210 } else { 3211 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3212 } 3213 return; 3214 } 3215 3216 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3217 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3218 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3219 return; 3220 } 3221 3222 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3223 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3224 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3225 return; 3226 } 3227 3228 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3229 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3230 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3231 return; 3232 } 3233 3234 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3235 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3236 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3237 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3238 return; 3239 } 3240 3241 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3242 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3243 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3244 return; 3245 } 3246 3247 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3248 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3249 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3250 return; 3251 } 3252 #endif 3253 3254 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3255 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3256 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3257 return; 3258 } 3259 3260 #ifdef ENABLE_BLE 3261 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 3262 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3263 3264 uint16_t connection_interval_min = connection->le_conn_interval_min; 3265 connection->le_conn_interval_min = 0; 3266 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 3267 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3268 0x0000, 0xffff); 3269 } 3270 #endif 3271 } 3272 3273 hci_connection_t * connection; 3274 switch (hci_stack->state){ 3275 case HCI_STATE_INITIALIZING: 3276 hci_initializing_run(); 3277 break; 3278 3279 case HCI_STATE_HALTING: 3280 3281 log_info("HCI_STATE_HALTING"); 3282 3283 // free whitelist entries 3284 #ifdef ENABLE_BLE 3285 #ifdef ENABLE_LE_CENTRAL 3286 { 3287 btstack_linked_list_iterator_t lit; 3288 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3289 while (btstack_linked_list_iterator_has_next(&lit)){ 3290 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3291 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3292 btstack_memory_whitelist_entry_free(entry); 3293 } 3294 } 3295 #endif 3296 #endif 3297 // close all open connections 3298 connection = (hci_connection_t *) hci_stack->connections; 3299 if (connection){ 3300 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3301 if (!hci_can_send_command_packet_now()) return; 3302 3303 // check state 3304 if (connection->state == SENT_DISCONNECT) return; 3305 connection->state = SENT_DISCONNECT; 3306 3307 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3308 3309 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3310 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3311 3312 // ... which would be ignored anyway as we shutdown (free) the connection now 3313 hci_shutdown_connection(connection); 3314 3315 // finally, send the disconnect command 3316 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3317 return; 3318 } 3319 log_info("HCI_STATE_HALTING, calling off"); 3320 3321 // switch mode 3322 hci_power_control_off(); 3323 3324 log_info("HCI_STATE_HALTING, emitting state"); 3325 hci_emit_state(); 3326 log_info("HCI_STATE_HALTING, done"); 3327 break; 3328 3329 case HCI_STATE_FALLING_ASLEEP: 3330 switch(hci_stack->substate) { 3331 case HCI_FALLING_ASLEEP_DISCONNECT: 3332 log_info("HCI_STATE_FALLING_ASLEEP"); 3333 // close all open connections 3334 connection = (hci_connection_t *) hci_stack->connections; 3335 3336 #ifdef HAVE_PLATFORM_IPHONE_OS 3337 // don't close connections, if H4 supports power management 3338 if (btstack_control_iphone_power_management_enabled()){ 3339 connection = NULL; 3340 } 3341 #endif 3342 if (connection){ 3343 3344 // send disconnect 3345 if (!hci_can_send_command_packet_now()) return; 3346 3347 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3348 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3349 3350 // send disconnected event right away - causes higher layer connections to get closed, too. 3351 hci_shutdown_connection(connection); 3352 return; 3353 } 3354 3355 if (hci_classic_supported()){ 3356 // disable page and inquiry scan 3357 if (!hci_can_send_command_packet_now()) return; 3358 3359 log_info("HCI_STATE_HALTING, disabling inq scans"); 3360 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3361 3362 // continue in next sub state 3363 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3364 break; 3365 } 3366 // no break - fall through for ble-only chips 3367 3368 case HCI_FALLING_ASLEEP_COMPLETE: 3369 log_info("HCI_STATE_HALTING, calling sleep"); 3370 #ifdef HAVE_PLATFORM_IPHONE_OS 3371 // don't actually go to sleep, if H4 supports power management 3372 if (btstack_control_iphone_power_management_enabled()){ 3373 // SLEEP MODE reached 3374 hci_stack->state = HCI_STATE_SLEEPING; 3375 hci_emit_state(); 3376 break; 3377 } 3378 #endif 3379 // switch mode 3380 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3381 hci_emit_state(); 3382 break; 3383 3384 default: 3385 break; 3386 } 3387 break; 3388 3389 default: 3390 break; 3391 } 3392 } 3393 3394 int hci_send_cmd_packet(uint8_t *packet, int size){ 3395 // house-keeping 3396 3397 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3398 hci_stack->loopback_mode = packet[3]; 3399 } 3400 3401 #ifdef ENABLE_CLASSIC 3402 bd_addr_t addr; 3403 hci_connection_t * conn; 3404 3405 // create_connection? 3406 if (IS_COMMAND(packet, hci_create_connection)){ 3407 reverse_bd_addr(&packet[3], addr); 3408 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3409 3410 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3411 if (!conn){ 3412 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3413 if (!conn){ 3414 // notify client that alloc failed 3415 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3416 return 0; // don't sent packet to controller 3417 } 3418 conn->state = SEND_CREATE_CONNECTION; 3419 } 3420 log_info("conn state %u", conn->state); 3421 switch (conn->state){ 3422 // if connection active exists 3423 case OPEN: 3424 // and OPEN, emit connection complete command, don't send to controller 3425 hci_emit_connection_complete(addr, conn->con_handle, 0); 3426 return 0; 3427 case SEND_CREATE_CONNECTION: 3428 // connection created by hci, e.g. dedicated bonding 3429 break; 3430 default: 3431 // otherwise, just ignore as it is already in the open process 3432 return 0; 3433 } 3434 conn->state = SENT_CREATE_CONNECTION; 3435 } 3436 3437 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3438 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3439 } 3440 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3441 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3442 } 3443 3444 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3445 if (hci_stack->link_key_db){ 3446 reverse_bd_addr(&packet[3], addr); 3447 hci_stack->link_key_db->delete_link_key(addr); 3448 } 3449 } 3450 3451 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3452 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3453 reverse_bd_addr(&packet[3], addr); 3454 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3455 if (conn){ 3456 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3457 } 3458 } 3459 3460 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3461 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3462 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3463 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3464 reverse_bd_addr(&packet[3], addr); 3465 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3466 if (conn){ 3467 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3468 } 3469 } 3470 3471 #ifdef ENABLE_SCO_OVER_HCI 3472 // setup_synchronous_connection? Voice setting at offset 22 3473 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3474 // TODO: compare to current setting if sco connection already active 3475 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3476 } 3477 // accept_synchronus_connection? Voice setting at offset 18 3478 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3479 // TODO: compare to current setting if sco connection already active 3480 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3481 } 3482 #endif 3483 #endif 3484 3485 #ifdef ENABLE_BLE 3486 #ifdef ENABLE_LE_PERIPHERAL 3487 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3488 hci_stack->le_random_address_set = 1; 3489 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3490 } 3491 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3492 hci_stack->le_advertisements_active = packet[3]; 3493 } 3494 #endif 3495 #ifdef ENABLE_LE_CENTRAL 3496 if (IS_COMMAND(packet, hci_le_create_connection)){ 3497 // white list used? 3498 uint8_t initiator_filter_policy = packet[7]; 3499 switch (initiator_filter_policy){ 3500 case 0: 3501 // whitelist not used 3502 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3503 break; 3504 case 1: 3505 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3506 break; 3507 default: 3508 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3509 break; 3510 } 3511 } 3512 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3513 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3514 } 3515 #endif 3516 #endif 3517 3518 hci_stack->num_cmd_packets--; 3519 3520 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3521 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3522 3523 // release packet buffer for synchronous transport implementations 3524 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3525 hci_stack->hci_packet_buffer_reserved = 0; 3526 } 3527 3528 return err; 3529 } 3530 3531 // disconnect because of security block 3532 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3533 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3534 if (!connection) return; 3535 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3536 } 3537 3538 3539 // Configure Secure Simple Pairing 3540 3541 #ifdef ENABLE_CLASSIC 3542 3543 // enable will enable SSP during init 3544 void gap_ssp_set_enable(int enable){ 3545 hci_stack->ssp_enable = enable; 3546 } 3547 3548 static int hci_local_ssp_activated(void){ 3549 return gap_ssp_supported() && hci_stack->ssp_enable; 3550 } 3551 3552 // if set, BTstack will respond to io capability request using authentication requirement 3553 void gap_ssp_set_io_capability(int io_capability){ 3554 hci_stack->ssp_io_capability = io_capability; 3555 } 3556 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3557 hci_stack->ssp_authentication_requirement = authentication_requirement; 3558 } 3559 3560 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3561 void gap_ssp_set_auto_accept(int auto_accept){ 3562 hci_stack->ssp_auto_accept = auto_accept; 3563 } 3564 #endif 3565 3566 // va_list part of hci_send_cmd 3567 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3568 if (!hci_can_send_command_packet_now()){ 3569 log_error("hci_send_cmd called but cannot send packet now"); 3570 return 0; 3571 } 3572 3573 // for HCI INITIALIZATION 3574 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3575 hci_stack->last_cmd_opcode = cmd->opcode; 3576 3577 hci_reserve_packet_buffer(); 3578 uint8_t * packet = hci_stack->hci_packet_buffer; 3579 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3580 return hci_send_cmd_packet(packet, size); 3581 } 3582 3583 /** 3584 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3585 */ 3586 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3587 va_list argptr; 3588 va_start(argptr, cmd); 3589 int res = hci_send_cmd_va_arg(cmd, argptr); 3590 va_end(argptr); 3591 return res; 3592 } 3593 3594 // Create various non-HCI events. 3595 // TODO: generalize, use table similar to hci_create_command 3596 3597 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3598 // dump packet 3599 if (dump) { 3600 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3601 } 3602 3603 // dispatch to all event handlers 3604 btstack_linked_list_iterator_t it; 3605 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3606 while (btstack_linked_list_iterator_has_next(&it)){ 3607 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3608 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3609 } 3610 } 3611 3612 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3613 if (!hci_stack->acl_packet_handler) return; 3614 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3615 } 3616 3617 #ifdef ENABLE_CLASSIC 3618 static void hci_notify_if_sco_can_send_now(void){ 3619 // notify SCO sender if waiting 3620 if (!hci_stack->sco_waiting_for_can_send_now) return; 3621 if (hci_can_send_sco_packet_now()){ 3622 hci_stack->sco_waiting_for_can_send_now = 0; 3623 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3624 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3625 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3626 } 3627 } 3628 3629 // parsing end emitting has been merged to reduce code size 3630 static void gap_inquiry_explode(uint8_t * packet){ 3631 uint8_t event[15+GAP_INQUIRY_MAX_NAME_LEN]; 3632 3633 uint8_t * eir_data; 3634 ad_context_t context; 3635 const uint8_t * name; 3636 uint8_t name_len; 3637 3638 int event_type = hci_event_packet_get_type(packet); 3639 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3640 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3641 3642 // event[1] is set at the end 3643 int i; 3644 for (i=0; i<num_responses;i++){ 3645 memset(event, 0, sizeof(event)); 3646 event[0] = GAP_EVENT_INQUIRY_RESULT; 3647 uint8_t event_size = 18; // if name is not set by EIR 3648 3649 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3650 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3651 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3652 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3653 3654 switch (event_type){ 3655 case HCI_EVENT_INQUIRY_RESULT: 3656 // 14,15,16,17 = 0, size 18 3657 break; 3658 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3659 event[14] = 1; 3660 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3661 // 16,17 = 0, size 18 3662 break; 3663 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3664 event[14] = 1; 3665 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3666 // for EIR packets, there is only one reponse in it 3667 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3668 name = NULL; 3669 // EIR data is 240 bytes in EIR event 3670 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3671 uint8_t data_type = ad_iterator_get_data_type(&context); 3672 uint8_t data_size = ad_iterator_get_data_len(&context); 3673 const uint8_t * data = ad_iterator_get_data(&context); 3674 // Prefer Complete Local Name over Shortend Local Name 3675 switch (data_type){ 3676 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3677 if (name) continue; 3678 /* explicit fall-through */ 3679 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3680 name = data; 3681 name_len = data_size; 3682 break; 3683 default: 3684 break; 3685 } 3686 } 3687 if (name){ 3688 event[16] = 1; 3689 // truncate name if needed 3690 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3691 event[17] = len; 3692 memcpy(&event[18], name, len); 3693 event_size += len; 3694 } 3695 break; 3696 } 3697 event[1] = event_size - 2; 3698 hci_emit_event(event, event_size, 1); 3699 } 3700 } 3701 #endif 3702 3703 void hci_emit_state(void){ 3704 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3705 uint8_t event[3]; 3706 event[0] = BTSTACK_EVENT_STATE; 3707 event[1] = sizeof(event) - 2; 3708 event[2] = hci_stack->state; 3709 hci_emit_event(event, sizeof(event), 1); 3710 } 3711 3712 #ifdef ENABLE_CLASSIC 3713 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3714 uint8_t event[13]; 3715 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3716 event[1] = sizeof(event) - 2; 3717 event[2] = status; 3718 little_endian_store_16(event, 3, con_handle); 3719 reverse_bd_addr(address, &event[5]); 3720 event[11] = 1; // ACL connection 3721 event[12] = 0; // encryption disabled 3722 hci_emit_event(event, sizeof(event), 1); 3723 } 3724 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3725 if (disable_l2cap_timeouts) return; 3726 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3727 uint8_t event[4]; 3728 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3729 event[1] = sizeof(event) - 2; 3730 little_endian_store_16(event, 2, conn->con_handle); 3731 hci_emit_event(event, sizeof(event), 1); 3732 } 3733 #endif 3734 3735 #ifdef ENABLE_BLE 3736 #ifdef ENABLE_LE_CENTRAL 3737 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3738 uint8_t event[21]; 3739 event[0] = HCI_EVENT_LE_META; 3740 event[1] = sizeof(event) - 2; 3741 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3742 event[3] = status; 3743 little_endian_store_16(event, 4, con_handle); 3744 event[6] = 0; // TODO: role 3745 event[7] = address_type; 3746 reverse_bd_addr(address, &event[8]); 3747 little_endian_store_16(event, 14, 0); // interval 3748 little_endian_store_16(event, 16, 0); // latency 3749 little_endian_store_16(event, 18, 0); // supervision timeout 3750 event[20] = 0; // master clock accuracy 3751 hci_emit_event(event, sizeof(event), 1); 3752 } 3753 #endif 3754 #endif 3755 3756 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3757 uint8_t event[6]; 3758 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3759 event[1] = sizeof(event) - 2; 3760 event[2] = 0; // status = OK 3761 little_endian_store_16(event, 3, con_handle); 3762 event[5] = reason; 3763 hci_emit_event(event, sizeof(event), 1); 3764 } 3765 3766 static void hci_emit_nr_connections_changed(void){ 3767 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3768 uint8_t event[3]; 3769 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3770 event[1] = sizeof(event) - 2; 3771 event[2] = nr_hci_connections(); 3772 hci_emit_event(event, sizeof(event), 1); 3773 } 3774 3775 static void hci_emit_hci_open_failed(void){ 3776 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3777 uint8_t event[2]; 3778 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3779 event[1] = sizeof(event) - 2; 3780 hci_emit_event(event, sizeof(event), 1); 3781 } 3782 3783 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3784 log_info("hci_emit_dedicated_bonding_result %u ", status); 3785 uint8_t event[9]; 3786 int pos = 0; 3787 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3788 event[pos++] = sizeof(event) - 2; 3789 event[pos++] = status; 3790 reverse_bd_addr(address, &event[pos]); 3791 hci_emit_event(event, sizeof(event), 1); 3792 } 3793 3794 3795 #ifdef ENABLE_CLASSIC 3796 3797 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3798 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3799 uint8_t event[5]; 3800 int pos = 0; 3801 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3802 event[pos++] = sizeof(event) - 2; 3803 little_endian_store_16(event, 2, con_handle); 3804 pos += 2; 3805 event[pos++] = level; 3806 hci_emit_event(event, sizeof(event), 1); 3807 } 3808 3809 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3810 if (!connection) return LEVEL_0; 3811 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3812 return gap_security_level_for_link_key_type(connection->link_key_type); 3813 } 3814 3815 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3816 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3817 uint8_t event[3]; 3818 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3819 event[1] = sizeof(event) - 2; 3820 event[2] = enabled; 3821 hci_emit_event(event, sizeof(event), 1); 3822 } 3823 3824 #ifdef ENABLE_CLASSIC 3825 // query if remote side supports eSCO 3826 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3827 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3828 if (!connection) return 0; 3829 return connection->remote_supported_feature_eSCO; 3830 } 3831 3832 // query if remote side supports SSP 3833 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3834 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3835 if (!connection) return 0; 3836 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3837 } 3838 3839 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3840 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3841 } 3842 #endif 3843 3844 // GAP API 3845 /** 3846 * @bbrief enable/disable bonding. default is enabled 3847 * @praram enabled 3848 */ 3849 void gap_set_bondable_mode(int enable){ 3850 hci_stack->bondable = enable ? 1 : 0; 3851 } 3852 /** 3853 * @brief Get bondable mode. 3854 * @return 1 if bondable 3855 */ 3856 int gap_get_bondable_mode(void){ 3857 return hci_stack->bondable; 3858 } 3859 3860 /** 3861 * @brief map link keys to security levels 3862 */ 3863 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3864 switch (link_key_type){ 3865 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3866 return LEVEL_4; 3867 case COMBINATION_KEY: 3868 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3869 return LEVEL_3; 3870 default: 3871 return LEVEL_2; 3872 } 3873 } 3874 3875 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3876 log_info("gap_mitm_protection_required_for_security_level %u", level); 3877 return level > LEVEL_2; 3878 } 3879 3880 /** 3881 * @brief get current security level 3882 */ 3883 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3884 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3885 if (!connection) return LEVEL_0; 3886 return gap_security_level_for_connection(connection); 3887 } 3888 3889 /** 3890 * @brief request connection to device to 3891 * @result GAP_AUTHENTICATION_RESULT 3892 */ 3893 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3894 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3895 if (!connection){ 3896 hci_emit_security_level(con_handle, LEVEL_0); 3897 return; 3898 } 3899 gap_security_level_t current_level = gap_security_level(con_handle); 3900 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3901 if (current_level >= requested_level){ 3902 hci_emit_security_level(con_handle, current_level); 3903 return; 3904 } 3905 3906 connection->requested_security_level = requested_level; 3907 3908 #if 0 3909 // sending encryption request without a link key results in an error. 3910 // TODO: figure out how to use it properly 3911 3912 // would enabling ecnryption suffice (>= LEVEL_2)? 3913 if (hci_stack->link_key_db){ 3914 link_key_type_t link_key_type; 3915 link_key_t link_key; 3916 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3917 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3918 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3919 return; 3920 } 3921 } 3922 } 3923 #endif 3924 3925 // try to authenticate connection 3926 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3927 hci_run(); 3928 } 3929 3930 /** 3931 * @brief start dedicated bonding with device. disconnect after bonding 3932 * @param device 3933 * @param request MITM protection 3934 * @result GAP_DEDICATED_BONDING_COMPLETE 3935 */ 3936 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3937 3938 // create connection state machine 3939 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3940 3941 if (!connection){ 3942 return BTSTACK_MEMORY_ALLOC_FAILED; 3943 } 3944 3945 // delete linkn key 3946 gap_drop_link_key_for_bd_addr(device); 3947 3948 // configure LEVEL_2/3, dedicated bonding 3949 connection->state = SEND_CREATE_CONNECTION; 3950 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3951 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3952 connection->bonding_flags = BONDING_DEDICATED; 3953 3954 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3955 3956 // handle: connnection failure (connection complete != ok) 3957 // handle: authentication failure 3958 // handle: disconnect on done 3959 3960 hci_run(); 3961 3962 return 0; 3963 } 3964 #endif 3965 3966 void gap_set_local_name(const char * local_name){ 3967 hci_stack->local_name = local_name; 3968 } 3969 3970 3971 #ifdef ENABLE_BLE 3972 3973 #ifdef ENABLE_LE_CENTRAL 3974 void gap_start_scan(void){ 3975 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3976 hci_stack->le_scanning_state = LE_START_SCAN; 3977 hci_run(); 3978 } 3979 3980 void gap_stop_scan(void){ 3981 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3982 hci_stack->le_scanning_state = LE_STOP_SCAN; 3983 hci_run(); 3984 } 3985 3986 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3987 hci_stack->le_scan_type = scan_type; 3988 hci_stack->le_scan_interval = scan_interval; 3989 hci_stack->le_scan_window = scan_window; 3990 hci_run(); 3991 } 3992 3993 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3994 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3995 if (!conn){ 3996 log_info("gap_connect: no connection exists yet, creating context"); 3997 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3998 if (!conn){ 3999 // notify client that alloc failed 4000 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4001 log_info("gap_connect: failed to alloc hci_connection_t"); 4002 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4003 } 4004 conn->state = SEND_CREATE_CONNECTION; 4005 log_info("gap_connect: send create connection next"); 4006 hci_run(); 4007 return 0; 4008 } 4009 4010 if (!hci_is_le_connection(conn) || 4011 conn->state == SEND_CREATE_CONNECTION || 4012 conn->state == SENT_CREATE_CONNECTION) { 4013 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4014 log_error("gap_connect: classic connection or connect is already being created"); 4015 return GATT_CLIENT_IN_WRONG_STATE; 4016 } 4017 4018 log_info("gap_connect: context exists with state %u", conn->state); 4019 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4020 hci_run(); 4021 return 0; 4022 } 4023 4024 // @assumption: only a single outgoing LE Connection exists 4025 static hci_connection_t * gap_get_outgoing_connection(void){ 4026 btstack_linked_item_t *it; 4027 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4028 hci_connection_t * conn = (hci_connection_t *) it; 4029 if (!hci_is_le_connection(conn)) continue; 4030 switch (conn->state){ 4031 case SEND_CREATE_CONNECTION: 4032 case SENT_CREATE_CONNECTION: 4033 return conn; 4034 default: 4035 break; 4036 }; 4037 } 4038 return NULL; 4039 } 4040 4041 uint8_t gap_connect_cancel(void){ 4042 hci_connection_t * conn = gap_get_outgoing_connection(); 4043 if (!conn) return 0; 4044 switch (conn->state){ 4045 case SEND_CREATE_CONNECTION: 4046 // skip sending create connection and emit event instead 4047 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4048 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4049 btstack_memory_hci_connection_free( conn ); 4050 break; 4051 case SENT_CREATE_CONNECTION: 4052 // request to send cancel connection 4053 conn->state = SEND_CANCEL_CONNECTION; 4054 hci_run(); 4055 break; 4056 default: 4057 break; 4058 } 4059 return 0; 4060 } 4061 #endif 4062 4063 #ifdef ENABLE_LE_CENTRAL 4064 /** 4065 * @brief Set connection parameters for outgoing connections 4066 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4067 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4068 * @param conn_latency, default: 4 4069 * @param supervision_timeout (unit: 10ms), default: 720 ms 4070 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4071 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4072 */ 4073 4074 void gap_set_connection_parameters(uint16_t conn_interval_min, uint16_t conn_interval_max, 4075 uint16_t conn_latency, uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4076 hci_stack->le_connection_interval_min = conn_interval_min; 4077 hci_stack->le_connection_interval_max = conn_interval_max; 4078 hci_stack->le_connection_latency = conn_latency; 4079 hci_stack->le_supervision_timeout = supervision_timeout; 4080 hci_stack->le_minimum_ce_length = min_ce_length; 4081 hci_stack->le_maximum_ce_length = max_ce_length; 4082 } 4083 #endif 4084 4085 /** 4086 * @brief Updates the connection parameters for a given LE connection 4087 * @param handle 4088 * @param conn_interval_min (unit: 1.25ms) 4089 * @param conn_interval_max (unit: 1.25ms) 4090 * @param conn_latency 4091 * @param supervision_timeout (unit: 10ms) 4092 * @returns 0 if ok 4093 */ 4094 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4095 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4096 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4097 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4098 connection->le_conn_interval_min = conn_interval_min; 4099 connection->le_conn_interval_max = conn_interval_max; 4100 connection->le_conn_latency = conn_latency; 4101 connection->le_supervision_timeout = supervision_timeout; 4102 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4103 hci_run(); 4104 return 0; 4105 } 4106 4107 /** 4108 * @brief Request an update of the connection parameter for a given LE connection 4109 * @param handle 4110 * @param conn_interval_min (unit: 1.25ms) 4111 * @param conn_interval_max (unit: 1.25ms) 4112 * @param conn_latency 4113 * @param supervision_timeout (unit: 10ms) 4114 * @returns 0 if ok 4115 */ 4116 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4117 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4118 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4119 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4120 connection->le_conn_interval_min = conn_interval_min; 4121 connection->le_conn_interval_max = conn_interval_max; 4122 connection->le_conn_latency = conn_latency; 4123 connection->le_supervision_timeout = supervision_timeout; 4124 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4125 hci_run(); 4126 return 0; 4127 } 4128 4129 #ifdef ENABLE_LE_PERIPHERAL 4130 4131 static void gap_advertisments_changed(void){ 4132 // disable advertisements before updating adv, scan data, or adv params 4133 if (hci_stack->le_advertisements_active){ 4134 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4135 } 4136 hci_run(); 4137 } 4138 4139 /** 4140 * @brief Set Advertisement Data 4141 * @param advertising_data_length 4142 * @param advertising_data (max 31 octets) 4143 * @note data is not copied, pointer has to stay valid 4144 */ 4145 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4146 hci_stack->le_advertisements_data_len = advertising_data_length; 4147 hci_stack->le_advertisements_data = advertising_data; 4148 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4149 gap_advertisments_changed(); 4150 } 4151 4152 /** 4153 * @brief Set Scan Response Data 4154 * @param advertising_data_length 4155 * @param advertising_data (max 31 octets) 4156 * @note data is not copied, pointer has to stay valid 4157 */ 4158 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4159 hci_stack->le_scan_response_data_len = scan_response_data_length; 4160 hci_stack->le_scan_response_data = scan_response_data; 4161 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4162 gap_advertisments_changed(); 4163 } 4164 4165 /** 4166 * @brief Set Advertisement Parameters 4167 * @param adv_int_min 4168 * @param adv_int_max 4169 * @param adv_type 4170 * @param direct_address_type 4171 * @param direct_address 4172 * @param channel_map 4173 * @param filter_policy 4174 * 4175 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4176 */ 4177 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4178 uint8_t direct_address_typ, bd_addr_t direct_address, 4179 uint8_t channel_map, uint8_t filter_policy) { 4180 4181 hci_stack->le_advertisements_interval_min = adv_int_min; 4182 hci_stack->le_advertisements_interval_max = adv_int_max; 4183 hci_stack->le_advertisements_type = adv_type; 4184 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4185 hci_stack->le_advertisements_channel_map = channel_map; 4186 hci_stack->le_advertisements_filter_policy = filter_policy; 4187 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4188 4189 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4190 gap_advertisments_changed(); 4191 } 4192 4193 /** 4194 * @brief Enable/Disable Advertisements 4195 * @param enabled 4196 */ 4197 void gap_advertisements_enable(int enabled){ 4198 hci_stack->le_advertisements_enabled = enabled; 4199 if (enabled && !hci_stack->le_advertisements_active){ 4200 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4201 } 4202 if (!enabled && hci_stack->le_advertisements_active){ 4203 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4204 } 4205 hci_run(); 4206 } 4207 4208 #endif 4209 4210 void hci_le_set_own_address_type(uint8_t own_address_type){ 4211 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4212 if (own_address_type == hci_stack->le_own_addr_type) return; 4213 hci_stack->le_own_addr_type = own_address_type; 4214 4215 #ifdef ENABLE_LE_PERIPHERAL 4216 // update advertisement parameters, too 4217 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4218 gap_advertisments_changed(); 4219 #endif 4220 #ifdef ENABLE_LE_CENTRAL 4221 // note: we don't update scan parameters or modify ongoing connection attempts 4222 #endif 4223 } 4224 4225 #endif 4226 4227 uint8_t gap_disconnect(hci_con_handle_t handle){ 4228 hci_connection_t * conn = hci_connection_for_handle(handle); 4229 if (!conn){ 4230 hci_emit_disconnection_complete(handle, 0); 4231 return 0; 4232 } 4233 conn->state = SEND_DISCONNECT; 4234 hci_run(); 4235 return 0; 4236 } 4237 4238 /** 4239 * @brief Get connection type 4240 * @param con_handle 4241 * @result connection_type 4242 */ 4243 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4244 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4245 if (!conn) return GAP_CONNECTION_INVALID; 4246 switch (conn->address_type){ 4247 case BD_ADDR_TYPE_LE_PUBLIC: 4248 case BD_ADDR_TYPE_LE_RANDOM: 4249 return GAP_CONNECTION_LE; 4250 case BD_ADDR_TYPE_SCO: 4251 return GAP_CONNECTION_SCO; 4252 case BD_ADDR_TYPE_CLASSIC: 4253 return GAP_CONNECTION_ACL; 4254 default: 4255 return GAP_CONNECTION_INVALID; 4256 } 4257 } 4258 4259 #ifdef ENABLE_BLE 4260 4261 #ifdef ENABLE_LE_CENTRAL 4262 /** 4263 * @brief Auto Connection Establishment - Start Connecting to device 4264 * @param address_typ 4265 * @param address 4266 * @returns 0 if ok 4267 */ 4268 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4269 // check capacity 4270 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4271 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4272 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4273 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4274 entry->address_type = address_type; 4275 memcpy(entry->address, address, 6); 4276 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4277 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4278 hci_run(); 4279 return 0; 4280 } 4281 4282 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4283 btstack_linked_list_iterator_t it; 4284 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4285 while (btstack_linked_list_iterator_has_next(&it)){ 4286 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4287 if (entry->address_type != address_type) continue; 4288 if (memcmp(entry->address, address, 6) != 0) continue; 4289 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4290 // remove from controller if already present 4291 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4292 continue; 4293 } 4294 // direclty remove entry from whitelist 4295 btstack_linked_list_iterator_remove(&it); 4296 btstack_memory_whitelist_entry_free(entry); 4297 } 4298 } 4299 4300 /** 4301 * @brief Auto Connection Establishment - Stop Connecting to device 4302 * @param address_typ 4303 * @param address 4304 * @returns 0 if ok 4305 */ 4306 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4307 hci_remove_from_whitelist(address_type, address); 4308 hci_run(); 4309 return 0; 4310 } 4311 4312 /** 4313 * @brief Auto Connection Establishment - Stop everything 4314 * @note Convenience function to stop all active auto connection attempts 4315 */ 4316 void gap_auto_connection_stop_all(void){ 4317 btstack_linked_list_iterator_t it; 4318 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4319 while (btstack_linked_list_iterator_has_next(&it)){ 4320 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4321 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4322 // remove from controller if already present 4323 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4324 continue; 4325 } 4326 // directly remove entry from whitelist 4327 btstack_linked_list_iterator_remove(&it); 4328 btstack_memory_whitelist_entry_free(entry); 4329 } 4330 hci_run(); 4331 } 4332 #endif 4333 #endif 4334 4335 #ifdef ENABLE_CLASSIC 4336 /** 4337 * @brief Set Extended Inquiry Response data 4338 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4339 * @note has to be done before stack starts up 4340 */ 4341 void gap_set_extended_inquiry_response(const uint8_t * data){ 4342 hci_stack->eir_data = data; 4343 } 4344 4345 /** 4346 * @brief Start GAP Classic Inquiry 4347 * @param duration in 1.28s units 4348 * @return 0 if ok 4349 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4350 */ 4351 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4352 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4353 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4354 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4355 } 4356 hci_stack->inquiry_state = duration_in_1280ms_units; 4357 hci_run(); 4358 return 0; 4359 } 4360 4361 /** 4362 * @brief Stop GAP Classic Inquiry 4363 * @returns 0 if ok 4364 */ 4365 int gap_inquiry_stop(void){ 4366 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4367 // emit inquiry complete event, before it even started 4368 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4369 hci_emit_event(event, sizeof(event), 1); 4370 return 0; 4371 } 4372 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4373 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4374 hci_run(); 4375 return 0; 4376 } 4377 4378 4379 /** 4380 * @brief Remote Name Request 4381 * @param addr 4382 * @param page_scan_repetition_mode 4383 * @param clock_offset only used when bit 15 is set 4384 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4385 */ 4386 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4387 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4388 memcpy(hci_stack->remote_name_addr, addr, 6); 4389 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4390 hci_stack->remote_name_clock_offset = clock_offset; 4391 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4392 hci_run(); 4393 return 0; 4394 } 4395 4396 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4397 hci_stack->gap_pairing_state = state; 4398 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4399 hci_run(); 4400 return 0; 4401 } 4402 4403 /** 4404 * @brief Legacy Pairing Pin Code Response 4405 * @param addr 4406 * @param pin 4407 * @return 0 if ok 4408 */ 4409 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4410 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4411 hci_stack->gap_pairing_pin = pin; 4412 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4413 } 4414 4415 /** 4416 * @brief Abort Legacy Pairing 4417 * @param addr 4418 * @param pin 4419 * @return 0 if ok 4420 */ 4421 int gap_pin_code_negative(bd_addr_t addr){ 4422 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4423 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4424 } 4425 4426 /** 4427 * @brief SSP Passkey Response 4428 * @param addr 4429 * @param passkey 4430 * @return 0 if ok 4431 */ 4432 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4433 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4434 hci_stack->gap_pairing_passkey = passkey; 4435 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4436 } 4437 4438 /** 4439 * @brief Abort SSP Passkey Entry/Pairing 4440 * @param addr 4441 * @param pin 4442 * @return 0 if ok 4443 */ 4444 int gap_ssp_passkey_negative(bd_addr_t addr){ 4445 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4446 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4447 } 4448 4449 /** 4450 * @brief Accept SSP Numeric Comparison 4451 * @param addr 4452 * @param passkey 4453 * @return 0 if ok 4454 */ 4455 int gap_ssp_confirmation_response(bd_addr_t addr){ 4456 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4457 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4458 } 4459 4460 /** 4461 * @brief Abort SSP Numeric Comparison/Pairing 4462 * @param addr 4463 * @param pin 4464 * @return 0 if ok 4465 */ 4466 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4467 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4468 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4469 } 4470 4471 /** 4472 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4473 * @param inquiry_mode see bluetooth_defines.h 4474 */ 4475 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4476 hci_stack->inquiry_mode = mode; 4477 } 4478 4479 /** 4480 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4481 */ 4482 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4483 hci_stack->sco_voice_setting = voice_setting; 4484 } 4485 4486 /** 4487 * @brief Get SCO Voice Setting 4488 * @return current voice setting 4489 */ 4490 uint16_t hci_get_sco_voice_setting(void){ 4491 return hci_stack->sco_voice_setting; 4492 } 4493 4494 /** @brief Get SCO packet length for current SCO Voice setting 4495 * @note Using SCO packets of the exact length is required for USB transfer 4496 * @return Length of SCO packets in bytes (not audio frames) 4497 */ 4498 int hci_get_sco_packet_length(void){ 4499 // see Core Spec for H2 USB Transfer. 4500 if (hci_stack->sco_voice_setting & 0x0020) return 51; 4501 return 27; 4502 } 4503 4504 /** 4505 * @brief Sets the master/slave policy 4506 * @param policy (0: attempt to become master, 1: let connecting device decide) 4507 */ 4508 void hci_set_master_slave_policy(uint8_t policy){ 4509 hci_stack->master_slave_policy = policy; 4510 } 4511 4512 #endif 4513 4514 HCI_STATE hci_get_state(void){ 4515 return hci_stack->state; 4516 } 4517 4518 4519 /** 4520 * @brief Set callback for Bluetooth Hardware Error 4521 */ 4522 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4523 hci_stack->hardware_error_callback = fn; 4524 } 4525 4526 void hci_disconnect_all(void){ 4527 btstack_linked_list_iterator_t it; 4528 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4529 while (btstack_linked_list_iterator_has_next(&it)){ 4530 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4531 if (con->state == SENT_DISCONNECT) continue; 4532 con->state = SEND_DISCONNECT; 4533 } 4534 hci_run(); 4535 } 4536 4537 uint16_t hci_get_manufacturer(void){ 4538 return hci_stack->manufacturer; 4539 } 4540 4541 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 4542 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 4543 if (!hci_con) return NULL; 4544 return &hci_con->sm_connection; 4545 } 4546 4547 #ifdef ENABLE_BLE 4548 4549 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 4550 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 4551 4552 int gap_encryption_key_size(hci_con_handle_t con_handle){ 4553 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4554 if (!sm_conn) return 0; // wrong connection 4555 if (!sm_conn->sm_connection_encrypted) return 0; 4556 return sm_conn->sm_actual_encryption_key_size; 4557 } 4558 4559 int gap_authenticated(hci_con_handle_t con_handle){ 4560 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4561 if (!sm_conn) return 0; // wrong connection 4562 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 4563 return sm_conn->sm_connection_authenticated; 4564 } 4565 4566 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 4567 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4568 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 4569 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 4570 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 4571 return sm_conn->sm_connection_authorization_state; 4572 } 4573 #endif 4574