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 "gap.h" 75 #include "hci.h" 76 #include "hci_cmd.h" 77 #include "hci_dump.h" 78 79 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 80 #ifndef HCI_HOST_ACL_PACKET_NUM 81 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 82 #endif 83 #ifndef HCI_HOST_ACL_PACKET_LEN 84 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 85 #endif 86 #ifndef HCI_HOST_SCO_PACKET_NUM 87 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 88 #endif 89 #ifndef HCI_HOST_SCO_PACKET_LEN 90 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 91 #endif 92 #endif 93 94 #define HCI_CONNECTION_TIMEOUT_MS 10000 95 #define HCI_RESET_RESEND_TIMEOUT_MS 200 96 97 // prototypes 98 #ifdef ENABLE_CLASSIC 99 static void hci_update_scan_enable(void); 100 static void hci_emit_discoverable_enabled(uint8_t enabled); 101 static int hci_local_ssp_activated(void); 102 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 103 static void hci_notify_if_sco_can_send_now(void); 104 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 105 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 106 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 107 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 108 static void hci_connection_timestamp(hci_connection_t *connection); 109 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 110 #endif 111 static int hci_power_control_on(void); 112 static void hci_power_control_off(void); 113 static void hci_state_reset(void); 114 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 115 static void hci_emit_nr_connections_changed(void); 116 static void hci_emit_hci_open_failed(void); 117 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 118 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 119 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 120 static void hci_run(void); 121 static int hci_is_le_connection(hci_connection_t * connection); 122 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 123 124 #ifdef ENABLE_BLE 125 #ifdef ENABLE_LE_CENTRAL 126 // called from test/ble_client/advertising_data_parser.c 127 void le_handle_advertisement_report(uint8_t *packet, int size); 128 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 129 #endif 130 #endif 131 132 // the STACK is here 133 #ifndef HAVE_MALLOC 134 static hci_stack_t hci_stack_static; 135 #endif 136 static hci_stack_t * hci_stack = NULL; 137 138 #ifdef ENABLE_CLASSIC 139 // test helper 140 static uint8_t disable_l2cap_timeouts = 0; 141 #endif 142 143 /** 144 * create connection for given address 145 * 146 * @return connection OR NULL, if no memory left 147 */ 148 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 149 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 150 hci_connection_t * conn = btstack_memory_hci_connection_get(); 151 if (!conn) return NULL; 152 memset(conn, 0, sizeof(hci_connection_t)); 153 bd_addr_copy(conn->address, addr); 154 conn->address_type = addr_type; 155 conn->con_handle = 0xffff; 156 conn->authentication_flags = AUTH_FLAGS_NONE; 157 conn->bonding_flags = 0; 158 conn->requested_security_level = LEVEL_0; 159 #ifdef ENABLE_CLASSIC 160 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 161 btstack_run_loop_set_timer_context(&conn->timeout, conn); 162 hci_connection_timestamp(conn); 163 #endif 164 conn->acl_recombination_length = 0; 165 conn->acl_recombination_pos = 0; 166 conn->num_acl_packets_sent = 0; 167 conn->num_sco_packets_sent = 0; 168 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 169 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 170 return conn; 171 } 172 173 174 /** 175 * get le connection parameter range 176 * 177 * @return le connection parameter range struct 178 */ 179 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 180 *range = hci_stack->le_connection_parameter_range; 181 } 182 183 /** 184 * set le connection parameter range 185 * 186 */ 187 188 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 189 hci_stack->le_connection_parameter_range = *range; 190 } 191 192 /** 193 * get hci connections iterator 194 * 195 * @return hci connections iterator 196 */ 197 198 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 199 btstack_linked_list_iterator_init(it, &hci_stack->connections); 200 } 201 202 /** 203 * get connection for a given handle 204 * 205 * @return connection OR NULL, if not found 206 */ 207 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 208 btstack_linked_list_iterator_t it; 209 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 210 while (btstack_linked_list_iterator_has_next(&it)){ 211 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 212 if ( item->con_handle == con_handle ) { 213 return item; 214 } 215 } 216 return NULL; 217 } 218 219 /** 220 * get connection for given address 221 * 222 * @return connection OR NULL, if not found 223 */ 224 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 225 btstack_linked_list_iterator_t it; 226 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 227 while (btstack_linked_list_iterator_has_next(&it)){ 228 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 229 if (connection->address_type != addr_type) continue; 230 if (memcmp(addr, connection->address, 6) != 0) continue; 231 return connection; 232 } 233 return NULL; 234 } 235 236 237 #ifdef ENABLE_CLASSIC 238 239 #ifdef ENABLE_SCO_OVER_HCI 240 static int hci_number_sco_connections(void){ 241 int connections = 0; 242 btstack_linked_list_iterator_t it; 243 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 244 while (btstack_linked_list_iterator_has_next(&it)){ 245 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 246 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 247 connections++; 248 } 249 return connections; 250 } 251 #endif 252 253 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 254 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 255 #ifdef HAVE_EMBEDDED_TICK 256 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 257 // connections might be timed out 258 hci_emit_l2cap_check_timeout(connection); 259 } 260 #else 261 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 262 // connections might be timed out 263 hci_emit_l2cap_check_timeout(connection); 264 } 265 #endif 266 } 267 268 static void hci_connection_timestamp(hci_connection_t *connection){ 269 #ifdef HAVE_EMBEDDED_TICK 270 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 271 #else 272 connection->timestamp = btstack_run_loop_get_time_ms(); 273 #endif 274 } 275 276 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 277 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 278 } 279 280 281 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 282 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 283 } 284 285 /** 286 * add authentication flags and reset timer 287 * @note: assumes classic connection 288 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 289 */ 290 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 291 bd_addr_t addr; 292 reverse_bd_addr(bd_addr, addr); 293 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 294 if (conn) { 295 connectionSetAuthenticationFlags(conn, flags); 296 hci_connection_timestamp(conn); 297 } 298 } 299 300 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 301 hci_connection_t * conn = hci_connection_for_handle(handle); 302 if (!conn) return 0; 303 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 304 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 305 return 0; 306 } 307 308 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 309 if (!hci_stack->link_key_db) return; 310 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 311 hci_stack->link_key_db->delete_link_key(addr); 312 } 313 314 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 315 if (!hci_stack->link_key_db) return; 316 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 317 hci_stack->link_key_db->put_link_key(addr, link_key, type); 318 } 319 #endif 320 321 static int hci_is_le_connection(hci_connection_t * connection){ 322 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 323 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 324 } 325 326 /** 327 * count connections 328 */ 329 static int nr_hci_connections(void){ 330 int count = 0; 331 btstack_linked_item_t *it; 332 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 333 return count; 334 } 335 336 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 337 338 unsigned int num_packets_sent_classic = 0; 339 unsigned int num_packets_sent_le = 0; 340 341 btstack_linked_item_t *it; 342 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 343 hci_connection_t * connection = (hci_connection_t *) it; 344 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 345 num_packets_sent_classic += connection->num_acl_packets_sent; 346 } else { 347 num_packets_sent_le += connection->num_acl_packets_sent; 348 } 349 } 350 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 351 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 352 int free_slots_le = 0; 353 354 if (free_slots_classic < 0){ 355 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); 356 return 0; 357 } 358 359 if (hci_stack->le_acl_packets_total_num){ 360 // if we have LE slots, they are used 361 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 362 if (free_slots_le < 0){ 363 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); 364 return 0; 365 } 366 } else { 367 // otherwise, classic slots are used for LE, too 368 free_slots_classic -= num_packets_sent_le; 369 if (free_slots_classic < 0){ 370 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); 371 return 0; 372 } 373 } 374 375 switch (address_type){ 376 case BD_ADDR_TYPE_UNKNOWN: 377 log_error("hci_number_free_acl_slots: unknown address type"); 378 return 0; 379 380 case BD_ADDR_TYPE_CLASSIC: 381 return free_slots_classic; 382 383 default: 384 if (hci_stack->le_acl_packets_total_num){ 385 return free_slots_le; 386 } 387 return free_slots_classic; 388 } 389 } 390 391 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 392 // get connection type 393 hci_connection_t * connection = hci_connection_for_handle(con_handle); 394 if (!connection){ 395 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 396 return 0; 397 } 398 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 399 } 400 401 #ifdef ENABLE_CLASSIC 402 static int hci_number_free_sco_slots(void){ 403 unsigned int num_sco_packets_sent = 0; 404 btstack_linked_item_t *it; 405 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 406 hci_connection_t * connection = (hci_connection_t *) it; 407 num_sco_packets_sent += connection->num_sco_packets_sent; 408 } 409 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 410 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 411 return 0; 412 } 413 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 414 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 415 } 416 #endif 417 418 // only used to send HCI Host Number Completed Packets 419 static int hci_can_send_comand_packet_transport(void){ 420 if (hci_stack->hci_packet_buffer_reserved) return 0; 421 422 // check for async hci transport implementations 423 if (hci_stack->hci_transport->can_send_packet_now){ 424 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 425 return 0; 426 } 427 } 428 return 1; 429 } 430 431 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 432 int hci_can_send_command_packet_now(void){ 433 if (hci_can_send_comand_packet_transport() == 0) return 0; 434 return hci_stack->num_cmd_packets > 0; 435 } 436 437 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 438 // check for async hci transport implementations 439 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 440 return hci_stack->hci_transport->can_send_packet_now(packet_type); 441 } 442 443 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 444 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 445 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 446 } 447 448 int hci_can_send_acl_le_packet_now(void){ 449 if (hci_stack->hci_packet_buffer_reserved) return 0; 450 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 451 } 452 453 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 454 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 455 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 456 } 457 458 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 459 if (hci_stack->hci_packet_buffer_reserved) return 0; 460 return hci_can_send_prepared_acl_packet_now(con_handle); 461 } 462 463 #ifdef ENABLE_CLASSIC 464 int hci_can_send_acl_classic_packet_now(void){ 465 if (hci_stack->hci_packet_buffer_reserved) return 0; 466 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 467 } 468 469 int hci_can_send_prepared_sco_packet_now(void){ 470 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 471 if (!hci_stack->synchronous_flow_control_enabled) return 1; 472 return hci_number_free_sco_slots() > 0; 473 } 474 475 int hci_can_send_sco_packet_now(void){ 476 if (hci_stack->hci_packet_buffer_reserved) return 0; 477 return hci_can_send_prepared_sco_packet_now(); 478 } 479 480 void hci_request_sco_can_send_now_event(void){ 481 hci_stack->sco_waiting_for_can_send_now = 1; 482 hci_notify_if_sco_can_send_now(); 483 } 484 #endif 485 486 // used for internal checks in l2cap.c 487 int hci_is_packet_buffer_reserved(void){ 488 return hci_stack->hci_packet_buffer_reserved; 489 } 490 491 // reserves outgoing packet buffer. @returns 1 if successful 492 int hci_reserve_packet_buffer(void){ 493 if (hci_stack->hci_packet_buffer_reserved) { 494 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 495 return 0; 496 } 497 hci_stack->hci_packet_buffer_reserved = 1; 498 return 1; 499 } 500 501 void hci_release_packet_buffer(void){ 502 hci_stack->hci_packet_buffer_reserved = 0; 503 } 504 505 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 506 static int hci_transport_synchronous(void){ 507 return hci_stack->hci_transport->can_send_packet_now == NULL; 508 } 509 510 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 511 512 // 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); 513 514 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 515 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 516 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 517 max_acl_data_packet_length = hci_stack->le_data_packets_length; 518 } 519 520 // testing: reduce buffer to minimum 521 // max_acl_data_packet_length = 52; 522 523 log_debug("hci_send_acl_packet_fragments entered"); 524 525 int err; 526 // multiple packets could be send on a synchronous HCI transport 527 while (1){ 528 529 log_debug("hci_send_acl_packet_fragments loop entered"); 530 531 // get current data 532 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 533 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 534 int more_fragments = 0; 535 536 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 537 if (current_acl_data_packet_length > max_acl_data_packet_length){ 538 more_fragments = 1; 539 current_acl_data_packet_length = max_acl_data_packet_length; 540 } 541 542 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 543 if (acl_header_pos > 0){ 544 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 545 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 546 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 547 } 548 549 // update header len 550 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 551 552 // count packet 553 connection->num_acl_packets_sent++; 554 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 555 556 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 557 if (more_fragments){ 558 // update start of next fragment to send 559 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 560 } else { 561 // done 562 hci_stack->acl_fragmentation_pos = 0; 563 hci_stack->acl_fragmentation_total_size = 0; 564 } 565 566 // send packet 567 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 568 const int size = current_acl_data_packet_length + 4; 569 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 570 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 571 572 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 573 574 // done yet? 575 if (!more_fragments) break; 576 577 // can send more? 578 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 579 } 580 581 log_debug("hci_send_acl_packet_fragments loop over"); 582 583 // release buffer now for synchronous transport 584 if (hci_transport_synchronous()){ 585 hci_release_packet_buffer(); 586 // notify upper stack that it might be possible to send again 587 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 588 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 589 } 590 591 return err; 592 } 593 594 // pre: caller has reserved the packet buffer 595 int hci_send_acl_packet_buffer(int size){ 596 597 // log_info("hci_send_acl_packet_buffer size %u", size); 598 599 if (!hci_stack->hci_packet_buffer_reserved) { 600 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 601 return 0; 602 } 603 604 uint8_t * packet = hci_stack->hci_packet_buffer; 605 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 606 607 // check for free places on Bluetooth module 608 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 609 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 610 hci_release_packet_buffer(); 611 return BTSTACK_ACL_BUFFERS_FULL; 612 } 613 614 hci_connection_t *connection = hci_connection_for_handle( con_handle); 615 if (!connection) { 616 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 617 hci_release_packet_buffer(); 618 return 0; 619 } 620 621 #ifdef ENABLE_CLASSIC 622 hci_connection_timestamp(connection); 623 #endif 624 625 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 626 627 // setup data 628 hci_stack->acl_fragmentation_total_size = size; 629 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 630 631 return hci_send_acl_packet_fragments(connection); 632 } 633 634 #ifdef ENABLE_CLASSIC 635 // pre: caller has reserved the packet buffer 636 int hci_send_sco_packet_buffer(int size){ 637 638 // log_info("hci_send_acl_packet_buffer size %u", size); 639 640 if (!hci_stack->hci_packet_buffer_reserved) { 641 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 642 return 0; 643 } 644 645 uint8_t * packet = hci_stack->hci_packet_buffer; 646 647 // skip checks in loopback mode 648 if (!hci_stack->loopback_mode){ 649 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 650 651 // check for free places on Bluetooth module 652 if (!hci_can_send_prepared_sco_packet_now()) { 653 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 654 hci_release_packet_buffer(); 655 return BTSTACK_ACL_BUFFERS_FULL; 656 } 657 658 // track send packet in connection struct 659 hci_connection_t *connection = hci_connection_for_handle( con_handle); 660 if (!connection) { 661 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 662 hci_release_packet_buffer(); 663 return 0; 664 } 665 connection->num_sco_packets_sent++; 666 } 667 668 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 669 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 670 671 if (hci_transport_synchronous()){ 672 hci_release_packet_buffer(); 673 // notify upper stack that it might be possible to send again 674 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 675 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 676 } 677 678 return err; 679 } 680 #endif 681 682 static void acl_handler(uint8_t *packet, int size){ 683 684 // log_info("acl_handler: size %u", size); 685 686 // get info 687 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 688 hci_connection_t *conn = hci_connection_for_handle(con_handle); 689 uint8_t acl_flags = READ_ACL_FLAGS(packet); 690 uint16_t acl_length = READ_ACL_LENGTH(packet); 691 692 // ignore non-registered handle 693 if (!conn){ 694 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 695 return; 696 } 697 698 // assert packet is complete 699 if (acl_length + 4 != size){ 700 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 701 return; 702 } 703 704 #ifdef ENABLE_CLASSIC 705 // update idle timestamp 706 hci_connection_timestamp(conn); 707 #endif 708 709 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 710 hci_stack->host_completed_packets = 1; 711 conn->num_packets_completed++; 712 #endif 713 714 // handle different packet types 715 switch (acl_flags & 0x03) { 716 717 case 0x01: // continuation fragment 718 719 // sanity checks 720 if (conn->acl_recombination_pos == 0) { 721 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 722 return; 723 } 724 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 725 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 726 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 727 conn->acl_recombination_pos = 0; 728 return; 729 } 730 731 // append fragment payload (header already stored) 732 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 733 conn->acl_recombination_pos += acl_length; 734 735 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 736 // conn->acl_recombination_pos, conn->acl_recombination_length); 737 738 // forward complete L2CAP packet if complete. 739 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 740 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 741 // reset recombination buffer 742 conn->acl_recombination_length = 0; 743 conn->acl_recombination_pos = 0; 744 } 745 break; 746 747 case 0x02: { // first fragment 748 749 // sanity check 750 if (conn->acl_recombination_pos) { 751 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 752 conn->acl_recombination_pos = 0; 753 } 754 755 // peek into L2CAP packet! 756 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 757 758 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 759 760 // compare fragment size to L2CAP packet size 761 if (acl_length >= l2cap_length + 4){ 762 // forward fragment as L2CAP packet 763 hci_emit_acl_packet(packet, acl_length + 4); 764 } else { 765 766 if (acl_length > HCI_ACL_BUFFER_SIZE){ 767 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 768 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 769 return; 770 } 771 772 // store first fragment and tweak acl length for complete package 773 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 774 conn->acl_recombination_pos = acl_length + 4; 775 conn->acl_recombination_length = l2cap_length; 776 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 777 } 778 break; 779 780 } 781 default: 782 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 783 return; 784 } 785 786 // execute main loop 787 hci_run(); 788 } 789 790 static void hci_shutdown_connection(hci_connection_t *conn){ 791 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 792 793 #ifdef ENABLE_SCO_OVER_HCI 794 int addr_type = conn->address_type; 795 #endif 796 797 btstack_run_loop_remove_timer(&conn->timeout); 798 799 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 800 btstack_memory_hci_connection_free( conn ); 801 802 // now it's gone 803 hci_emit_nr_connections_changed(); 804 805 #ifdef ENABLE_SCO_OVER_HCI 806 // update SCO 807 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 808 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 809 } 810 #endif 811 } 812 813 #ifdef ENABLE_CLASSIC 814 815 static const uint16_t packet_type_sizes[] = { 816 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 817 HCI_ACL_DH1_SIZE, 0, 0, 0, 818 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 819 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 820 }; 821 static const uint8_t packet_type_feature_requirement_bit[] = { 822 0, // 3 slot packets 823 1, // 5 slot packets 824 25, // EDR 2 mpbs 825 26, // EDR 3 mbps 826 39, // 3 slot EDR packts 827 40, // 5 slot EDR packet 828 }; 829 static const uint16_t packet_type_feature_packet_mask[] = { 830 0x0f00, // 3 slot packets 831 0xf000, // 5 slot packets 832 0x1102, // EDR 2 mpbs 833 0x2204, // EDR 3 mbps 834 0x0300, // 3 slot EDR packts 835 0x3000, // 5 slot EDR packet 836 }; 837 838 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 839 // enable packet types based on size 840 uint16_t packet_types = 0; 841 unsigned int i; 842 for (i=0;i<16;i++){ 843 if (packet_type_sizes[i] == 0) continue; 844 if (packet_type_sizes[i] <= buffer_size){ 845 packet_types |= 1 << i; 846 } 847 } 848 // disable packet types due to missing local supported features 849 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 850 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 851 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 852 if (feature_set) continue; 853 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 854 packet_types &= ~packet_type_feature_packet_mask[i]; 855 } 856 // flip bits for "may not be used" 857 packet_types ^= 0x3306; 858 return packet_types; 859 } 860 861 uint16_t hci_usable_acl_packet_types(void){ 862 return hci_stack->packet_types; 863 } 864 #endif 865 866 uint8_t* hci_get_outgoing_packet_buffer(void){ 867 // hci packet buffer is >= acl data packet length 868 return hci_stack->hci_packet_buffer; 869 } 870 871 uint16_t hci_max_acl_data_packet_length(void){ 872 return hci_stack->acl_data_packet_length; 873 } 874 875 #ifdef ENABLE_CLASSIC 876 int hci_extended_sco_link_supported(void){ 877 // No. 31, byte 3, bit 7 878 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 879 } 880 #endif 881 882 int hci_non_flushable_packet_boundary_flag_supported(void){ 883 // No. 54, byte 6, bit 6 884 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 885 } 886 887 static int gap_ssp_supported(void){ 888 // No. 51, byte 6, bit 3 889 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 890 } 891 892 static int hci_classic_supported(void){ 893 #ifdef ENABLE_CLASSIC 894 // No. 37, byte 4, bit 5, = No BR/EDR Support 895 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 896 #else 897 return 0; 898 #endif 899 } 900 901 static int hci_le_supported(void){ 902 #ifdef ENABLE_BLE 903 // No. 37, byte 4, bit 6 = LE Supported (Controller) 904 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 905 #else 906 return 0; 907 #endif 908 } 909 910 #ifdef ENABLE_BLE 911 912 /** 913 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 914 */ 915 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 916 *addr_type = hci_stack->le_own_addr_type; 917 if (hci_stack->le_own_addr_type){ 918 memcpy(addr, hci_stack->le_random_address, 6); 919 } else { 920 memcpy(addr, hci_stack->local_bd_addr, 6); 921 } 922 } 923 924 #ifdef ENABLE_LE_CENTRAL 925 void le_handle_advertisement_report(uint8_t *packet, int size){ 926 927 UNUSED(size); 928 929 int offset = 3; 930 int num_reports = packet[offset]; 931 offset += 1; 932 933 int i; 934 // log_info("HCI: handle adv report with num reports: %d", num_reports); 935 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 936 for (i=0; i<num_reports;i++){ 937 uint8_t data_length = packet[offset + 8]; 938 uint8_t event_size = 10 + data_length; 939 int pos = 0; 940 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 941 event[pos++] = event_size; 942 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 943 offset += 8; 944 pos += 8; 945 event[pos++] = packet[offset + 1 + data_length]; // rssi 946 event[pos++] = packet[offset++]; //data_length; 947 memcpy(&event[pos], &packet[offset], data_length); 948 pos += data_length; 949 offset += data_length + 1; // rssi 950 hci_emit_event(event, pos, 1); 951 } 952 } 953 #endif 954 #endif 955 956 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 957 958 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 959 if (!hci_stack->config) return 0; 960 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 961 // Limit baud rate for Broadcom chipsets to 3 mbps 962 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 963 baud_rate = 3000000; 964 } 965 return baud_rate; 966 } 967 968 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 969 UNUSED(ds); 970 971 switch (hci_stack->substate){ 972 case HCI_INIT_W4_SEND_RESET: 973 log_info("Resend HCI Reset"); 974 hci_stack->substate = HCI_INIT_SEND_RESET; 975 hci_stack->num_cmd_packets = 1; 976 hci_run(); 977 break; 978 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 979 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 980 if (hci_stack->hci_transport->reset_link){ 981 hci_stack->hci_transport->reset_link(); 982 } 983 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 984 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 985 log_info("Resend HCI Reset - CSR Warm Boot"); 986 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 987 hci_stack->num_cmd_packets = 1; 988 hci_run(); 989 break; 990 case HCI_INIT_W4_SEND_BAUD_CHANGE: 991 if (hci_stack->hci_transport->set_baudrate){ 992 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 993 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 994 hci_stack->hci_transport->set_baudrate(baud_rate); 995 } 996 // For CSR, HCI Reset is sent on new baud rate 997 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 998 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 999 hci_run(); 1000 } 1001 break; 1002 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1003 // otherwise continue 1004 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1005 hci_send_cmd(&hci_read_local_supported_commands); 1006 break; 1007 default: 1008 break; 1009 } 1010 } 1011 #endif 1012 1013 static void hci_initializing_next_state(void){ 1014 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1015 } 1016 1017 // assumption: hci_can_send_command_packet_now() == true 1018 static void hci_initializing_run(void){ 1019 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1020 switch (hci_stack->substate){ 1021 case HCI_INIT_SEND_RESET: 1022 hci_state_reset(); 1023 1024 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1025 // prepare reset if command complete not received in 100ms 1026 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1027 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1028 btstack_run_loop_add_timer(&hci_stack->timeout); 1029 #endif 1030 // send command 1031 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1032 hci_send_cmd(&hci_reset); 1033 break; 1034 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1035 hci_send_cmd(&hci_read_local_version_information); 1036 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1037 break; 1038 case HCI_INIT_SEND_READ_LOCAL_NAME: 1039 hci_send_cmd(&hci_read_local_name); 1040 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1041 break; 1042 1043 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1044 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1045 hci_state_reset(); 1046 // prepare reset if command complete not received in 100ms 1047 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1048 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1049 btstack_run_loop_add_timer(&hci_stack->timeout); 1050 // send command 1051 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1052 hci_send_cmd(&hci_reset); 1053 break; 1054 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1055 hci_state_reset(); 1056 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1057 hci_send_cmd(&hci_reset); 1058 break; 1059 case HCI_INIT_SEND_BAUD_CHANGE: { 1060 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1061 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1062 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1063 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1064 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1065 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1066 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1067 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1068 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1069 btstack_run_loop_add_timer(&hci_stack->timeout); 1070 } 1071 break; 1072 } 1073 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1074 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1075 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1076 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1077 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1078 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1079 break; 1080 } 1081 case HCI_INIT_CUSTOM_INIT: 1082 // Custom initialization 1083 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1084 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1085 if (valid_cmd){ 1086 int size = 3 + hci_stack->hci_packet_buffer[2]; 1087 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1088 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1089 switch (valid_cmd) { 1090 case 1: 1091 default: 1092 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1093 break; 1094 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1095 log_info("CSR Warm Boot"); 1096 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1097 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1098 btstack_run_loop_add_timer(&hci_stack->timeout); 1099 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1100 && hci_stack->config 1101 && hci_stack->chipset 1102 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1103 && hci_stack->hci_transport->set_baudrate 1104 && hci_transport_uart_get_main_baud_rate()){ 1105 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1106 } else { 1107 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1108 } 1109 break; 1110 } 1111 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1112 break; 1113 } 1114 log_info("Init script done"); 1115 1116 // Init script download on Broadcom chipsets causes: 1117 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1118 // - baud rate to reset, restore UART baud rate if needed 1119 int need_baud_change = hci_stack->config 1120 && hci_stack->chipset 1121 && hci_stack->chipset->set_baudrate_command 1122 && hci_stack->hci_transport->set_baudrate 1123 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1124 if (need_baud_change) { 1125 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1126 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1127 hci_stack->hci_transport->set_baudrate(baud_rate); 1128 } 1129 1130 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1131 // -> Work around: wait a few milliseconds here. 1132 log_info("BCM delay after init script"); 1133 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1134 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1135 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1136 btstack_run_loop_add_timer(&hci_stack->timeout); 1137 break; 1138 } 1139 } 1140 // otherwise continue 1141 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1142 hci_send_cmd(&hci_read_local_supported_commands); 1143 break; 1144 case HCI_INIT_SET_BD_ADDR: 1145 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1146 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1147 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1148 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1149 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1150 break; 1151 #endif 1152 1153 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1154 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1155 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1156 hci_send_cmd(&hci_read_local_supported_commands); 1157 break; 1158 case HCI_INIT_READ_BD_ADDR: 1159 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1160 hci_send_cmd(&hci_read_bd_addr); 1161 break; 1162 case HCI_INIT_READ_BUFFER_SIZE: 1163 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1164 hci_send_cmd(&hci_read_buffer_size); 1165 break; 1166 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1167 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1168 hci_send_cmd(&hci_read_local_supported_features); 1169 break; 1170 1171 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1172 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1173 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1174 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1175 break; 1176 case HCI_INIT_HOST_BUFFER_SIZE: 1177 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1178 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1179 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1180 break; 1181 #endif 1182 1183 case HCI_INIT_SET_EVENT_MASK: 1184 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1185 if (hci_le_supported()){ 1186 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1187 } else { 1188 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1189 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1190 } 1191 break; 1192 1193 #ifdef ENABLE_CLASSIC 1194 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1195 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1196 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1197 break; 1198 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1199 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1200 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1201 break; 1202 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1203 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1204 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1205 break; 1206 case HCI_INIT_WRITE_LOCAL_NAME: 1207 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1208 if (hci_stack->local_name){ 1209 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1210 } else { 1211 char local_name[8+17+1]; 1212 // BTstack 11:22:33:44:55:66 1213 memcpy(local_name, "BTstack ", 8); 1214 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1215 local_name[8+17] = '\0'; 1216 log_info("---> Name %s", local_name); 1217 hci_send_cmd(&hci_write_local_name, local_name); 1218 } 1219 break; 1220 case HCI_INIT_WRITE_EIR_DATA: 1221 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1222 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1223 break; 1224 case HCI_INIT_WRITE_INQUIRY_MODE: 1225 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1226 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1227 break; 1228 case HCI_INIT_WRITE_SCAN_ENABLE: 1229 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1230 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1231 break; 1232 // only sent if ENABLE_SCO_OVER_HCI is defined 1233 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1234 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1235 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1236 break; 1237 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1238 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1239 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1240 break; 1241 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1242 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1243 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1244 log_info("BCM: Route SCO data via HCI transport"); 1245 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1246 break; 1247 1248 #endif 1249 #ifdef ENABLE_BLE 1250 // LE INIT 1251 case HCI_INIT_LE_READ_BUFFER_SIZE: 1252 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1253 hci_send_cmd(&hci_le_read_buffer_size); 1254 break; 1255 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1256 // LE Supported Host = 1, Simultaneous Host = 0 1257 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1258 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1259 break; 1260 #ifdef ENABLE_LE_CENTRAL 1261 case HCI_INIT_READ_WHITE_LIST_SIZE: 1262 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1263 hci_send_cmd(&hci_le_read_white_list_size); 1264 break; 1265 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1266 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1267 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1268 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1269 break; 1270 #endif 1271 #endif 1272 default: 1273 return; 1274 } 1275 } 1276 1277 static void hci_init_done(void){ 1278 // done. tell the app 1279 log_info("hci_init_done -> HCI_STATE_WORKING"); 1280 hci_stack->state = HCI_STATE_WORKING; 1281 hci_emit_state(); 1282 hci_run(); 1283 } 1284 1285 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1286 UNUSED(size); 1287 1288 uint8_t command_completed = 0; 1289 1290 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1291 uint16_t opcode = little_endian_read_16(packet,3); 1292 if (opcode == hci_stack->last_cmd_opcode){ 1293 command_completed = 1; 1294 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1295 } else { 1296 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1297 } 1298 } 1299 1300 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1301 uint8_t status = packet[2]; 1302 uint16_t opcode = little_endian_read_16(packet,4); 1303 if (opcode == hci_stack->last_cmd_opcode){ 1304 if (status){ 1305 command_completed = 1; 1306 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1307 } else { 1308 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1309 } 1310 } else { 1311 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1312 } 1313 } 1314 1315 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1316 1317 // Vendor == CSR 1318 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1319 // TODO: track actual command 1320 command_completed = 1; 1321 } 1322 1323 // Vendor == Toshiba 1324 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1325 // TODO: track actual command 1326 command_completed = 1; 1327 } 1328 1329 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1330 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1331 // 1332 // HCI Reset 1333 // Timeout 100 ms 1334 // HCI Reset 1335 // Command Complete Reset 1336 // HCI Read Local Version Information 1337 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1338 // hang... 1339 // 1340 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1341 if (!command_completed 1342 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1343 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1344 1345 uint16_t opcode = little_endian_read_16(packet,3); 1346 if (opcode == hci_reset.opcode){ 1347 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1348 return; 1349 } 1350 } 1351 1352 // CSR & H5 1353 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1354 if (!command_completed 1355 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1356 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1357 1358 uint16_t opcode = little_endian_read_16(packet,3); 1359 if (opcode == hci_reset.opcode){ 1360 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1361 return; 1362 } 1363 } 1364 1365 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1366 // fix: Correct substate and behave as command below 1367 if (command_completed){ 1368 switch (hci_stack->substate){ 1369 case HCI_INIT_SEND_RESET: 1370 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1371 break; 1372 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1373 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1374 break; 1375 default: 1376 break; 1377 } 1378 } 1379 1380 #endif 1381 1382 if (!command_completed) return; 1383 1384 int need_baud_change = 0; 1385 int need_addr_change = 0; 1386 1387 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1388 need_baud_change = hci_stack->config 1389 && hci_stack->chipset 1390 && hci_stack->chipset->set_baudrate_command 1391 && hci_stack->hci_transport->set_baudrate 1392 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1393 1394 need_addr_change = hci_stack->custom_bd_addr_set 1395 && hci_stack->chipset 1396 && hci_stack->chipset->set_bd_addr_command; 1397 #endif 1398 1399 switch(hci_stack->substate){ 1400 1401 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1402 case HCI_INIT_SEND_RESET: 1403 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1404 // fix: just correct substate and behave as command below 1405 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1406 btstack_run_loop_remove_timer(&hci_stack->timeout); 1407 break; 1408 case HCI_INIT_W4_SEND_RESET: 1409 btstack_run_loop_remove_timer(&hci_stack->timeout); 1410 break; 1411 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1412 log_info("Received local name, need baud change %d", need_baud_change); 1413 if (need_baud_change){ 1414 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1415 return; 1416 } 1417 // skip baud change 1418 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1419 return; 1420 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1421 // for STLC2500D, baud rate change already happened. 1422 // for others, baud rate gets changed now 1423 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1424 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1425 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1426 hci_stack->hci_transport->set_baudrate(baud_rate); 1427 } 1428 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1429 return; 1430 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1431 btstack_run_loop_remove_timer(&hci_stack->timeout); 1432 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1433 return; 1434 case HCI_INIT_W4_CUSTOM_INIT: 1435 // repeat custom init 1436 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1437 return; 1438 #else 1439 case HCI_INIT_W4_SEND_RESET: 1440 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1441 return ; 1442 #endif 1443 1444 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1445 if (need_baud_change && hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1446 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1447 return; 1448 } 1449 if (need_addr_change){ 1450 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1451 return; 1452 } 1453 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1454 return; 1455 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1456 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1457 if (need_baud_change){ 1458 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1459 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1460 hci_stack->hci_transport->set_baudrate(baud_rate); 1461 } 1462 if (need_addr_change){ 1463 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1464 return; 1465 } 1466 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1467 return; 1468 case HCI_INIT_W4_SET_BD_ADDR: 1469 // for STLC2500D, bd addr change only gets active after sending reset command 1470 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1471 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1472 return; 1473 } 1474 // skipping st warm boot 1475 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1476 return; 1477 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1478 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1479 return; 1480 #endif 1481 case HCI_INIT_W4_READ_BD_ADDR: 1482 // only read buffer size if supported 1483 if (hci_stack->local_supported_commands[0] & 0x01) { 1484 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1485 return; 1486 } 1487 // skipping read buffer size 1488 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1489 return; 1490 case HCI_INIT_W4_SET_EVENT_MASK: 1491 // skip Classic init commands for LE only chipsets 1492 if (!hci_classic_supported()){ 1493 #ifdef ENABLE_BLE 1494 if (hci_le_supported()){ 1495 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1496 return; 1497 } 1498 #endif 1499 log_error("Neither BR/EDR nor LE supported"); 1500 hci_init_done(); 1501 return; 1502 } 1503 if (!gap_ssp_supported()){ 1504 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1505 return; 1506 } 1507 break; 1508 #ifdef ENABLE_BLE 1509 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1510 // skip write le host if not supported (e.g. on LE only EM9301) 1511 if (hci_stack->local_supported_commands[0] & 0x02) break; 1512 #ifdef ENABLE_LE_CENTRAL 1513 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1514 #else 1515 hci_init_done(); 1516 #endif 1517 return; 1518 #endif 1519 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1520 // skip write eir data if no eir data set 1521 if (hci_stack->eir_data) break; 1522 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1523 return; 1524 1525 #ifdef ENABLE_SCO_OVER_HCI 1526 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1527 // skip write synchronous flow control if not supported 1528 if (hci_stack->local_supported_commands[0] & 0x04) break; 1529 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1530 // explicit fall through to reduce repetitions 1531 1532 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1533 // skip write default erroneous data reporting if not supported 1534 if (hci_stack->local_supported_commands[0] & 0x08) break; 1535 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1536 // explicit fall through to reduce repetitions 1537 1538 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1539 // skip bcm set sco pcm config on non-Broadcom chipsets 1540 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1541 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1542 // explicit fall through to reduce repetitions 1543 1544 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1545 if (!hci_le_supported()){ 1546 // SKIP LE init for Classic only configuration 1547 hci_init_done(); 1548 return; 1549 } 1550 break; 1551 1552 #else /* !ENABLE_SCO_OVER_HCI */ 1553 1554 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1555 #ifdef ENABLE_BLE 1556 if (hci_le_supported()){ 1557 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1558 return; 1559 } 1560 #endif 1561 // SKIP LE init for Classic only configuration 1562 hci_init_done(); 1563 return; 1564 #endif /* ENABLE_SCO_OVER_HCI */ 1565 1566 // Response to command before init done state -> init done 1567 case (HCI_INIT_DONE-1): 1568 hci_init_done(); 1569 return; 1570 1571 default: 1572 break; 1573 } 1574 hci_initializing_next_state(); 1575 } 1576 1577 static void event_handler(uint8_t *packet, int size){ 1578 1579 uint16_t event_length = packet[1]; 1580 1581 // assert packet is complete 1582 if (size != event_length + 2){ 1583 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1584 return; 1585 } 1586 1587 bd_addr_t addr; 1588 bd_addr_type_t addr_type; 1589 uint8_t link_type; 1590 hci_con_handle_t handle; 1591 hci_connection_t * conn; 1592 int i; 1593 1594 // warnings 1595 (void) link_type; 1596 1597 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1598 1599 switch (hci_event_packet_get_type(packet)) { 1600 1601 case HCI_EVENT_COMMAND_COMPLETE: 1602 // get num cmd packets - limit to 1 to reduce complexity 1603 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1604 1605 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1606 if (packet[5]) break; 1607 // terminate, name 248 chars 1608 packet[6+248] = 0; 1609 log_info("local name: %s", &packet[6]); 1610 } 1611 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1612 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1613 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1614 uint16_t acl_len = little_endian_read_16(packet, 6); 1615 uint16_t sco_len = packet[8]; 1616 1617 // determine usable ACL/SCO payload size 1618 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1619 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1620 1621 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1622 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1623 1624 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1625 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1626 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1627 } 1628 } 1629 #ifdef ENABLE_BLE 1630 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1631 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1632 hci_stack->le_acl_packets_total_num = packet[8]; 1633 // determine usable ACL payload size 1634 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1635 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1636 } 1637 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1638 } 1639 #ifdef ENABLE_LE_CENTRAL 1640 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1641 hci_stack->le_whitelist_capacity = packet[6]; 1642 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1643 } 1644 #endif 1645 #endif 1646 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1647 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1648 hci_stack->local_bd_addr); 1649 log_info("Local Address, Status: 0x%02x: Addr: %s", 1650 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1651 #ifdef ENABLE_CLASSIC 1652 if (hci_stack->link_key_db){ 1653 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1654 } 1655 #endif 1656 } 1657 #ifdef ENABLE_CLASSIC 1658 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1659 hci_emit_discoverable_enabled(hci_stack->discoverable); 1660 } 1661 #endif 1662 1663 // Note: HCI init checks 1664 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1665 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1666 1667 #ifdef ENABLE_CLASSIC 1668 // determine usable ACL packet types based on host buffer size and supported features 1669 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1670 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1671 #endif 1672 // Classic/LE 1673 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1674 } 1675 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1676 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1677 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1678 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1679 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1680 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1681 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1682 } 1683 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1684 hci_stack->local_supported_commands[0] = 1685 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1686 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1687 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1688 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1689 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1690 } 1691 #ifdef ENABLE_CLASSIC 1692 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1693 if (packet[5] == 0){ 1694 hci_stack->synchronous_flow_control_enabled = 1; 1695 } 1696 } 1697 #endif 1698 break; 1699 1700 case HCI_EVENT_COMMAND_STATUS: 1701 // get num cmd packets - limit to 1 to reduce complexity 1702 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1703 break; 1704 1705 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1706 int offset = 3; 1707 for (i=0; i<packet[2];i++){ 1708 handle = little_endian_read_16(packet, offset); 1709 offset += 2; 1710 uint16_t num_packets = little_endian_read_16(packet, offset); 1711 offset += 2; 1712 1713 conn = hci_connection_for_handle(handle); 1714 if (!conn){ 1715 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1716 continue; 1717 } 1718 1719 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1720 #ifdef ENABLE_CLASSIC 1721 if (conn->num_sco_packets_sent >= num_packets){ 1722 conn->num_sco_packets_sent -= num_packets; 1723 } else { 1724 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1725 conn->num_sco_packets_sent = 0; 1726 } 1727 hci_notify_if_sco_can_send_now(); 1728 #endif 1729 } else { 1730 if (conn->num_acl_packets_sent >= num_packets){ 1731 conn->num_acl_packets_sent -= num_packets; 1732 } else { 1733 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1734 conn->num_acl_packets_sent = 0; 1735 } 1736 } 1737 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1738 } 1739 break; 1740 } 1741 1742 #ifdef ENABLE_CLASSIC 1743 case HCI_EVENT_CONNECTION_REQUEST: 1744 reverse_bd_addr(&packet[2], addr); 1745 // TODO: eval COD 8-10 1746 link_type = packet[11]; 1747 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1748 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1749 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1750 if (!conn) { 1751 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1752 } 1753 if (!conn) { 1754 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1755 hci_stack->decline_reason = 0x0d; 1756 bd_addr_copy(hci_stack->decline_addr, addr); 1757 break; 1758 } 1759 conn->role = HCI_ROLE_SLAVE; 1760 conn->state = RECEIVED_CONNECTION_REQUEST; 1761 // store info about eSCO 1762 if (link_type == 0x02){ 1763 conn->remote_supported_feature_eSCO = 1; 1764 } 1765 hci_run(); 1766 break; 1767 1768 case HCI_EVENT_CONNECTION_COMPLETE: 1769 // Connection management 1770 reverse_bd_addr(&packet[5], addr); 1771 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1772 addr_type = BD_ADDR_TYPE_CLASSIC; 1773 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1774 if (conn) { 1775 if (!packet[2]){ 1776 conn->state = OPEN; 1777 conn->con_handle = little_endian_read_16(packet, 3); 1778 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1779 1780 // restart timer 1781 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1782 btstack_run_loop_add_timer(&conn->timeout); 1783 1784 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1785 1786 hci_emit_nr_connections_changed(); 1787 } else { 1788 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1789 uint8_t status = packet[2]; 1790 bd_addr_t bd_address; 1791 memcpy(&bd_address, conn->address, 6); 1792 1793 // connection failed, remove entry 1794 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1795 btstack_memory_hci_connection_free( conn ); 1796 1797 // notify client if dedicated bonding 1798 if (notify_dedicated_bonding_failed){ 1799 log_info("hci notify_dedicated_bonding_failed"); 1800 hci_emit_dedicated_bonding_result(bd_address, status); 1801 } 1802 1803 // if authentication error, also delete link key 1804 if (packet[2] == 0x05) { 1805 gap_drop_link_key_for_bd_addr(addr); 1806 } 1807 } 1808 } 1809 break; 1810 1811 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1812 reverse_bd_addr(&packet[5], addr); 1813 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1814 if (packet[2]){ 1815 // connection failed 1816 break; 1817 } 1818 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1819 if (!conn) { 1820 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1821 } 1822 if (!conn) { 1823 break; 1824 } 1825 conn->state = OPEN; 1826 conn->con_handle = little_endian_read_16(packet, 3); 1827 1828 #ifdef ENABLE_SCO_OVER_HCI 1829 // update SCO 1830 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1831 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1832 } 1833 #endif 1834 break; 1835 1836 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1837 handle = little_endian_read_16(packet, 3); 1838 conn = hci_connection_for_handle(handle); 1839 if (!conn) break; 1840 if (!packet[2]){ 1841 uint8_t * features = &packet[5]; 1842 if (features[6] & (1 << 3)){ 1843 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1844 } 1845 if (features[3] & (1<<7)){ 1846 conn->remote_supported_feature_eSCO = 1; 1847 } 1848 } 1849 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1850 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1851 if (conn->bonding_flags & BONDING_DEDICATED){ 1852 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1853 } 1854 break; 1855 1856 case HCI_EVENT_LINK_KEY_REQUEST: 1857 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1858 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1859 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1860 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1861 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1862 hci_run(); 1863 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1864 return; 1865 1866 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1867 reverse_bd_addr(&packet[2], addr); 1868 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1869 if (!conn) break; 1870 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1871 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1872 // Change Connection Encryption keeps link key type 1873 if (link_key_type != CHANGED_COMBINATION_KEY){ 1874 conn->link_key_type = link_key_type; 1875 } 1876 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1877 // still forward event to allow dismiss of pairing dialog 1878 break; 1879 } 1880 1881 case HCI_EVENT_PIN_CODE_REQUEST: 1882 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1883 // non-bondable mode: pin code negative reply will be sent 1884 if (!hci_stack->bondable){ 1885 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1886 hci_run(); 1887 return; 1888 } 1889 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1890 if (!hci_stack->link_key_db) break; 1891 hci_event_pin_code_request_get_bd_addr(packet, addr); 1892 hci_stack->link_key_db->delete_link_key(addr); 1893 break; 1894 1895 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1896 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1897 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1898 break; 1899 1900 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1901 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1902 if (!hci_stack->ssp_auto_accept) break; 1903 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1904 break; 1905 1906 case HCI_EVENT_USER_PASSKEY_REQUEST: 1907 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1908 if (!hci_stack->ssp_auto_accept) break; 1909 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1910 break; 1911 #endif 1912 1913 case HCI_EVENT_ENCRYPTION_CHANGE: 1914 handle = little_endian_read_16(packet, 3); 1915 conn = hci_connection_for_handle(handle); 1916 if (!conn) break; 1917 if (packet[2] == 0) { 1918 if (packet[5]){ 1919 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1920 } else { 1921 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1922 } 1923 } 1924 #ifdef ENABLE_CLASSIC 1925 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1926 #endif 1927 break; 1928 1929 #ifdef ENABLE_CLASSIC 1930 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1931 handle = little_endian_read_16(packet, 3); 1932 conn = hci_connection_for_handle(handle); 1933 if (!conn) break; 1934 1935 // dedicated bonding: send result and disconnect 1936 if (conn->bonding_flags & BONDING_DEDICATED){ 1937 conn->bonding_flags &= ~BONDING_DEDICATED; 1938 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1939 conn->bonding_status = packet[2]; 1940 break; 1941 } 1942 1943 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1944 // link key sufficient for requested security 1945 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1946 break; 1947 } 1948 // not enough 1949 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1950 break; 1951 #endif 1952 1953 // HCI_EVENT_DISCONNECTION_COMPLETE 1954 // has been split, to first notify stack before shutting connection down 1955 // see end of function, too. 1956 case HCI_EVENT_DISCONNECTION_COMPLETE: 1957 if (packet[2]) break; // status != 0 1958 handle = little_endian_read_16(packet, 3); 1959 // drop outgoing ACL fragments if it is for closed connection 1960 if (hci_stack->acl_fragmentation_total_size > 0) { 1961 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1962 log_info("hci: drop fragmented ACL data for closed connection"); 1963 hci_stack->acl_fragmentation_total_size = 0; 1964 hci_stack->acl_fragmentation_pos = 0; 1965 } 1966 } 1967 1968 // re-enable advertisements for le connections if active 1969 conn = hci_connection_for_handle(handle); 1970 if (!conn) break; 1971 #ifdef ENABLE_BLE 1972 #ifdef ENABLE_LE_PERIPHERAL 1973 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1974 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1975 } 1976 #endif 1977 #endif 1978 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1979 break; 1980 1981 case HCI_EVENT_HARDWARE_ERROR: 1982 log_error("Hardware Error: 0x%02x", packet[2]); 1983 if (hci_stack->hardware_error_callback){ 1984 (*hci_stack->hardware_error_callback)(packet[2]); 1985 } else { 1986 // if no special requests, just reboot stack 1987 hci_power_control_off(); 1988 hci_power_control_on(); 1989 } 1990 break; 1991 1992 #ifdef ENABLE_CLASSIC 1993 case HCI_EVENT_ROLE_CHANGE: 1994 if (packet[2]) break; // status != 0 1995 handle = little_endian_read_16(packet, 3); 1996 conn = hci_connection_for_handle(handle); 1997 if (!conn) break; // no conn 1998 conn->role = packet[9]; 1999 break; 2000 #endif 2001 2002 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2003 // release packet buffer only for asynchronous transport and if there are not further fragements 2004 if (hci_transport_synchronous()) { 2005 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2006 return; // instead of break: to avoid re-entering hci_run() 2007 } 2008 if (hci_stack->acl_fragmentation_total_size) break; 2009 hci_release_packet_buffer(); 2010 2011 // L2CAP receives this event via the hci_emit_event below 2012 2013 #ifdef ENABLE_CLASSIC 2014 // For SCO, we do the can_send_now_check here 2015 hci_notify_if_sco_can_send_now(); 2016 #endif 2017 break; 2018 2019 #ifdef ENABLE_CLASSIC 2020 case HCI_EVENT_SCO_CAN_SEND_NOW: 2021 // For SCO, we do the can_send_now_check here 2022 hci_notify_if_sco_can_send_now(); 2023 return; 2024 #endif 2025 2026 #ifdef ENABLE_BLE 2027 case HCI_EVENT_LE_META: 2028 switch (packet[2]){ 2029 #ifdef ENABLE_LE_CENTRAL 2030 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2031 // log_info("advertising report received"); 2032 if (hci_stack->le_scanning_state != LE_SCANNING) break; 2033 le_handle_advertisement_report(packet, size); 2034 break; 2035 #endif 2036 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2037 // Connection management 2038 reverse_bd_addr(&packet[8], addr); 2039 addr_type = (bd_addr_type_t)packet[7]; 2040 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2041 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2042 #ifdef ENABLE_LE_CENTRAL 2043 // if auto-connect, remove from whitelist in both roles 2044 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2045 hci_remove_from_whitelist(addr_type, addr); 2046 } 2047 // handle error: error is reported only to the initiator -> outgoing connection 2048 if (packet[3]){ 2049 // outgoing connection establishment is done 2050 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2051 // remove entry 2052 if (conn){ 2053 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2054 btstack_memory_hci_connection_free( conn ); 2055 } 2056 break; 2057 } 2058 #endif 2059 // on success, both hosts receive connection complete event 2060 if (packet[6] == HCI_ROLE_MASTER){ 2061 #ifdef ENABLE_LE_CENTRAL 2062 // if we're master, it was an outgoing connection and we're done with it 2063 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2064 #endif 2065 } else { 2066 #ifdef ENABLE_LE_PERIPHERAL 2067 // if we're slave, it was an incoming connection, advertisements have stopped 2068 hci_stack->le_advertisements_active = 0; 2069 // try to re-enable them 2070 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2071 #endif 2072 } 2073 // LE connections are auto-accepted, so just create a connection if there isn't one already 2074 if (!conn){ 2075 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2076 } 2077 // no memory, sorry. 2078 if (!conn){ 2079 break; 2080 } 2081 2082 conn->state = OPEN; 2083 conn->role = packet[6]; 2084 conn->con_handle = little_endian_read_16(packet, 4); 2085 2086 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2087 2088 // restart timer 2089 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2090 // btstack_run_loop_add_timer(&conn->timeout); 2091 2092 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2093 2094 hci_emit_nr_connections_changed(); 2095 break; 2096 2097 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2098 2099 default: 2100 break; 2101 } 2102 break; 2103 #endif 2104 default: 2105 break; 2106 } 2107 2108 // handle BT initialization 2109 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2110 hci_initializing_event_handler(packet, size); 2111 } 2112 2113 // help with BT sleep 2114 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2115 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2116 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2117 hci_initializing_next_state(); 2118 } 2119 2120 // notify upper stack 2121 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2122 2123 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2124 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2125 if (!packet[2]){ 2126 handle = little_endian_read_16(packet, 3); 2127 hci_connection_t * aConn = hci_connection_for_handle(handle); 2128 if (aConn) { 2129 uint8_t status = aConn->bonding_status; 2130 uint16_t flags = aConn->bonding_flags; 2131 bd_addr_t bd_address; 2132 memcpy(&bd_address, aConn->address, 6); 2133 hci_shutdown_connection(aConn); 2134 // connection struct is gone, don't access anymore 2135 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2136 hci_emit_dedicated_bonding_result(bd_address, status); 2137 } 2138 } 2139 } 2140 } 2141 2142 // execute main loop 2143 hci_run(); 2144 } 2145 2146 #ifdef ENABLE_CLASSIC 2147 static void sco_handler(uint8_t * packet, uint16_t size){ 2148 if (!hci_stack->sco_packet_handler) return; 2149 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2150 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2151 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2152 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2153 if (conn){ 2154 conn->num_packets_completed++; 2155 hci_stack->host_completed_packets = 1; 2156 hci_run(); 2157 } 2158 #endif 2159 } 2160 #endif 2161 2162 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2163 hci_dump_packet(packet_type, 1, packet, size); 2164 switch (packet_type) { 2165 case HCI_EVENT_PACKET: 2166 event_handler(packet, size); 2167 break; 2168 case HCI_ACL_DATA_PACKET: 2169 acl_handler(packet, size); 2170 break; 2171 #ifdef ENABLE_CLASSIC 2172 case HCI_SCO_DATA_PACKET: 2173 sco_handler(packet, size); 2174 break; 2175 #endif 2176 default: 2177 break; 2178 } 2179 } 2180 2181 /** 2182 * @brief Add event packet handler. 2183 */ 2184 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2185 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2186 } 2187 2188 2189 /** Register HCI packet handlers */ 2190 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2191 hci_stack->acl_packet_handler = handler; 2192 } 2193 2194 #ifdef ENABLE_CLASSIC 2195 /** 2196 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2197 */ 2198 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2199 hci_stack->sco_packet_handler = handler; 2200 } 2201 #endif 2202 2203 static void hci_state_reset(void){ 2204 // no connections yet 2205 hci_stack->connections = NULL; 2206 2207 // keep discoverable/connectable as this has been requested by the client(s) 2208 // hci_stack->discoverable = 0; 2209 // hci_stack->connectable = 0; 2210 // hci_stack->bondable = 1; 2211 // hci_stack->own_addr_type = 0; 2212 2213 // buffer is free 2214 hci_stack->hci_packet_buffer_reserved = 0; 2215 2216 // no pending cmds 2217 hci_stack->decline_reason = 0; 2218 hci_stack->new_scan_enable_value = 0xff; 2219 2220 // LE 2221 #ifdef ENABLE_BLE 2222 memset(hci_stack->le_random_address, 0, 6); 2223 hci_stack->le_random_address_set = 0; 2224 #endif 2225 #ifdef ENABLE_LE_CENTRAL 2226 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2227 hci_stack->le_scan_type = 0xff; 2228 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2229 hci_stack->le_whitelist = 0; 2230 hci_stack->le_whitelist_capacity = 0; 2231 #endif 2232 2233 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2234 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2235 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2236 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2237 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2238 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2239 } 2240 2241 #ifdef ENABLE_CLASSIC 2242 /** 2243 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2244 */ 2245 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2246 // store and open remote device db 2247 hci_stack->link_key_db = link_key_db; 2248 if (hci_stack->link_key_db) { 2249 hci_stack->link_key_db->open(); 2250 } 2251 } 2252 #endif 2253 2254 void hci_init(const hci_transport_t *transport, const void *config){ 2255 2256 #ifdef HAVE_MALLOC 2257 if (!hci_stack) { 2258 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2259 } 2260 #else 2261 hci_stack = &hci_stack_static; 2262 #endif 2263 memset(hci_stack, 0, sizeof(hci_stack_t)); 2264 2265 // reference to use transport layer implementation 2266 hci_stack->hci_transport = transport; 2267 2268 // reference to used config 2269 hci_stack->config = config; 2270 2271 // setup pointer for outgoing packet buffer 2272 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2273 2274 // max acl payload size defined in config.h 2275 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2276 2277 // register packet handlers with transport 2278 transport->register_packet_handler(&packet_handler); 2279 2280 hci_stack->state = HCI_STATE_OFF; 2281 2282 // class of device 2283 hci_stack->class_of_device = 0x007a020c; // Smartphone 2284 2285 // bondable by default 2286 hci_stack->bondable = 1; 2287 2288 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2289 hci_stack->ssp_enable = 1; 2290 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2291 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2292 hci_stack->ssp_auto_accept = 1; 2293 2294 // voice setting - signed 16 bit pcm data with CVSD over the air 2295 hci_stack->sco_voice_setting = 0x60; 2296 2297 hci_state_reset(); 2298 } 2299 2300 /** 2301 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2302 */ 2303 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2304 hci_stack->chipset = chipset_driver; 2305 2306 // reset chipset driver - init is also called on power_up 2307 if (hci_stack->chipset && hci_stack->chipset->init){ 2308 hci_stack->chipset->init(hci_stack->config); 2309 } 2310 } 2311 2312 /** 2313 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2314 */ 2315 void hci_set_control(const btstack_control_t *hardware_control){ 2316 // references to used control implementation 2317 hci_stack->control = hardware_control; 2318 // init with transport config 2319 hardware_control->init(hci_stack->config); 2320 } 2321 2322 void hci_close(void){ 2323 // close remote device db 2324 if (hci_stack->link_key_db) { 2325 hci_stack->link_key_db->close(); 2326 } 2327 2328 btstack_linked_list_iterator_t lit; 2329 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2330 while (btstack_linked_list_iterator_has_next(&lit)){ 2331 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2332 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2333 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2334 hci_shutdown_connection(connection); 2335 } 2336 2337 hci_power_control(HCI_POWER_OFF); 2338 2339 #ifdef HAVE_MALLOC 2340 free(hci_stack); 2341 #endif 2342 hci_stack = NULL; 2343 } 2344 2345 #ifdef ENABLE_CLASSIC 2346 void gap_set_class_of_device(uint32_t class_of_device){ 2347 hci_stack->class_of_device = class_of_device; 2348 } 2349 2350 void hci_disable_l2cap_timeout_check(void){ 2351 disable_l2cap_timeouts = 1; 2352 } 2353 #endif 2354 2355 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2356 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2357 void hci_set_bd_addr(bd_addr_t addr){ 2358 memcpy(hci_stack->custom_bd_addr, addr, 6); 2359 hci_stack->custom_bd_addr_set = 1; 2360 } 2361 #endif 2362 2363 // State-Module-Driver overview 2364 // state module low-level 2365 // HCI_STATE_OFF off close 2366 // HCI_STATE_INITIALIZING, on open 2367 // HCI_STATE_WORKING, on open 2368 // HCI_STATE_HALTING, on open 2369 // HCI_STATE_SLEEPING, off/sleep close 2370 // HCI_STATE_FALLING_ASLEEP on open 2371 2372 static int hci_power_control_on(void){ 2373 2374 // power on 2375 int err = 0; 2376 if (hci_stack->control && hci_stack->control->on){ 2377 err = (*hci_stack->control->on)(); 2378 } 2379 if (err){ 2380 log_error( "POWER_ON failed"); 2381 hci_emit_hci_open_failed(); 2382 return err; 2383 } 2384 2385 // int chipset driver 2386 if (hci_stack->chipset && hci_stack->chipset->init){ 2387 hci_stack->chipset->init(hci_stack->config); 2388 } 2389 2390 // init transport 2391 if (hci_stack->hci_transport->init){ 2392 hci_stack->hci_transport->init(hci_stack->config); 2393 } 2394 2395 // open transport 2396 err = hci_stack->hci_transport->open(); 2397 if (err){ 2398 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2399 if (hci_stack->control && hci_stack->control->off){ 2400 (*hci_stack->control->off)(); 2401 } 2402 hci_emit_hci_open_failed(); 2403 return err; 2404 } 2405 return 0; 2406 } 2407 2408 static void hci_power_control_off(void){ 2409 2410 log_info("hci_power_control_off"); 2411 2412 // close low-level device 2413 hci_stack->hci_transport->close(); 2414 2415 log_info("hci_power_control_off - hci_transport closed"); 2416 2417 // power off 2418 if (hci_stack->control && hci_stack->control->off){ 2419 (*hci_stack->control->off)(); 2420 } 2421 2422 log_info("hci_power_control_off - control closed"); 2423 2424 hci_stack->state = HCI_STATE_OFF; 2425 } 2426 2427 static void hci_power_control_sleep(void){ 2428 2429 log_info("hci_power_control_sleep"); 2430 2431 #if 0 2432 // don't close serial port during sleep 2433 2434 // close low-level device 2435 hci_stack->hci_transport->close(hci_stack->config); 2436 #endif 2437 2438 // sleep mode 2439 if (hci_stack->control && hci_stack->control->sleep){ 2440 (*hci_stack->control->sleep)(); 2441 } 2442 2443 hci_stack->state = HCI_STATE_SLEEPING; 2444 } 2445 2446 static int hci_power_control_wake(void){ 2447 2448 log_info("hci_power_control_wake"); 2449 2450 // wake on 2451 if (hci_stack->control && hci_stack->control->wake){ 2452 (*hci_stack->control->wake)(); 2453 } 2454 2455 #if 0 2456 // open low-level device 2457 int err = hci_stack->hci_transport->open(hci_stack->config); 2458 if (err){ 2459 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2460 if (hci_stack->control && hci_stack->control->off){ 2461 (*hci_stack->control->off)(); 2462 } 2463 hci_emit_hci_open_failed(); 2464 return err; 2465 } 2466 #endif 2467 2468 return 0; 2469 } 2470 2471 static void hci_power_transition_to_initializing(void){ 2472 // set up state machine 2473 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2474 hci_stack->hci_packet_buffer_reserved = 0; 2475 hci_stack->state = HCI_STATE_INITIALIZING; 2476 hci_stack->substate = HCI_INIT_SEND_RESET; 2477 } 2478 2479 int hci_power_control(HCI_POWER_MODE power_mode){ 2480 2481 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2482 2483 int err = 0; 2484 switch (hci_stack->state){ 2485 2486 case HCI_STATE_OFF: 2487 switch (power_mode){ 2488 case HCI_POWER_ON: 2489 err = hci_power_control_on(); 2490 if (err) { 2491 log_error("hci_power_control_on() error %d", err); 2492 return err; 2493 } 2494 hci_power_transition_to_initializing(); 2495 break; 2496 case HCI_POWER_OFF: 2497 // do nothing 2498 break; 2499 case HCI_POWER_SLEEP: 2500 // do nothing (with SLEEP == OFF) 2501 break; 2502 } 2503 break; 2504 2505 case HCI_STATE_INITIALIZING: 2506 switch (power_mode){ 2507 case HCI_POWER_ON: 2508 // do nothing 2509 break; 2510 case HCI_POWER_OFF: 2511 // no connections yet, just turn it off 2512 hci_power_control_off(); 2513 break; 2514 case HCI_POWER_SLEEP: 2515 // no connections yet, just turn it off 2516 hci_power_control_sleep(); 2517 break; 2518 } 2519 break; 2520 2521 case HCI_STATE_WORKING: 2522 switch (power_mode){ 2523 case HCI_POWER_ON: 2524 // do nothing 2525 break; 2526 case HCI_POWER_OFF: 2527 // see hci_run 2528 hci_stack->state = HCI_STATE_HALTING; 2529 break; 2530 case HCI_POWER_SLEEP: 2531 // see hci_run 2532 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2533 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2534 break; 2535 } 2536 break; 2537 2538 case HCI_STATE_HALTING: 2539 switch (power_mode){ 2540 case HCI_POWER_ON: 2541 hci_power_transition_to_initializing(); 2542 break; 2543 case HCI_POWER_OFF: 2544 // do nothing 2545 break; 2546 case HCI_POWER_SLEEP: 2547 // see hci_run 2548 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2549 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2550 break; 2551 } 2552 break; 2553 2554 case HCI_STATE_FALLING_ASLEEP: 2555 switch (power_mode){ 2556 case HCI_POWER_ON: 2557 2558 #ifdef HAVE_PLATFORM_IPHONE_OS 2559 // nothing to do, if H4 supports power management 2560 if (btstack_control_iphone_power_management_enabled()){ 2561 hci_stack->state = HCI_STATE_INITIALIZING; 2562 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2563 break; 2564 } 2565 #endif 2566 hci_power_transition_to_initializing(); 2567 break; 2568 case HCI_POWER_OFF: 2569 // see hci_run 2570 hci_stack->state = HCI_STATE_HALTING; 2571 break; 2572 case HCI_POWER_SLEEP: 2573 // do nothing 2574 break; 2575 } 2576 break; 2577 2578 case HCI_STATE_SLEEPING: 2579 switch (power_mode){ 2580 case HCI_POWER_ON: 2581 2582 #ifdef HAVE_PLATFORM_IPHONE_OS 2583 // nothing to do, if H4 supports power management 2584 if (btstack_control_iphone_power_management_enabled()){ 2585 hci_stack->state = HCI_STATE_INITIALIZING; 2586 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2587 hci_update_scan_enable(); 2588 break; 2589 } 2590 #endif 2591 err = hci_power_control_wake(); 2592 if (err) return err; 2593 hci_power_transition_to_initializing(); 2594 break; 2595 case HCI_POWER_OFF: 2596 hci_stack->state = HCI_STATE_HALTING; 2597 break; 2598 case HCI_POWER_SLEEP: 2599 // do nothing 2600 break; 2601 } 2602 break; 2603 } 2604 2605 // create internal event 2606 hci_emit_state(); 2607 2608 // trigger next/first action 2609 hci_run(); 2610 2611 return 0; 2612 } 2613 2614 2615 #ifdef ENABLE_CLASSIC 2616 2617 static void hci_update_scan_enable(void){ 2618 // 2 = page scan, 1 = inq scan 2619 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2620 hci_run(); 2621 } 2622 2623 void gap_discoverable_control(uint8_t enable){ 2624 if (enable) enable = 1; // normalize argument 2625 2626 if (hci_stack->discoverable == enable){ 2627 hci_emit_discoverable_enabled(hci_stack->discoverable); 2628 return; 2629 } 2630 2631 hci_stack->discoverable = enable; 2632 hci_update_scan_enable(); 2633 } 2634 2635 void gap_connectable_control(uint8_t enable){ 2636 if (enable) enable = 1; // normalize argument 2637 2638 // don't emit event 2639 if (hci_stack->connectable == enable) return; 2640 2641 hci_stack->connectable = enable; 2642 hci_update_scan_enable(); 2643 } 2644 #endif 2645 2646 void gap_local_bd_addr(bd_addr_t address_buffer){ 2647 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2648 } 2649 2650 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2651 static void hci_host_num_completed_packets(void){ 2652 2653 // create packet manually as arrays are not supported and num_commands should not get reduced 2654 hci_reserve_packet_buffer(); 2655 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2656 2657 uint16_t size = 0; 2658 uint16_t num_handles = 0; 2659 packet[size++] = 0x35; 2660 packet[size++] = 0x0c; 2661 size++; // skip param len 2662 size++; // skip num handles 2663 2664 // add { handle, packets } entries 2665 btstack_linked_item_t * it; 2666 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2667 hci_connection_t * connection = (hci_connection_t *) it; 2668 if (connection->num_packets_completed){ 2669 little_endian_store_16(packet, size, connection->con_handle); 2670 size += 2; 2671 little_endian_store_16(packet, size, connection->num_packets_completed); 2672 size += 2; 2673 // 2674 num_handles++; 2675 connection->num_packets_completed = 0; 2676 } 2677 } 2678 2679 packet[2] = size - 3; 2680 packet[3] = num_handles; 2681 2682 hci_stack->host_completed_packets = 0; 2683 2684 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2685 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2686 2687 // release packet buffer for synchronous transport implementations 2688 if (hci_transport_synchronous()){ 2689 hci_stack->hci_packet_buffer_reserved = 0; 2690 } 2691 } 2692 #endif 2693 2694 static void hci_run(void){ 2695 2696 // log_info("hci_run: entered"); 2697 btstack_linked_item_t * it; 2698 2699 // send continuation fragments first, as they block the prepared packet buffer 2700 if (hci_stack->acl_fragmentation_total_size > 0) { 2701 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2702 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2703 if (connection) { 2704 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2705 hci_send_acl_packet_fragments(connection); 2706 return; 2707 } 2708 } else { 2709 // connection gone -> discard further fragments 2710 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2711 hci_stack->acl_fragmentation_total_size = 0; 2712 hci_stack->acl_fragmentation_pos = 0; 2713 } 2714 } 2715 2716 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2717 // send host num completed packets next as they don't require num_cmd_packets > 0 2718 if (!hci_can_send_comand_packet_transport()) return; 2719 if (hci_stack->host_completed_packets){ 2720 hci_host_num_completed_packets(); 2721 return; 2722 } 2723 #endif 2724 2725 if (!hci_can_send_command_packet_now()) return; 2726 2727 // global/non-connection oriented commands 2728 2729 #ifdef ENABLE_CLASSIC 2730 // decline incoming connections 2731 if (hci_stack->decline_reason){ 2732 uint8_t reason = hci_stack->decline_reason; 2733 hci_stack->decline_reason = 0; 2734 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2735 return; 2736 } 2737 2738 // send scan enable 2739 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2740 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2741 hci_stack->new_scan_enable_value = 0xff; 2742 return; 2743 } 2744 #endif 2745 2746 #ifdef ENABLE_BLE 2747 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2748 if ((hci_stack->state == HCI_STATE_WORKING) 2749 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2750 2751 #ifdef ENABLE_LE_CENTRAL 2752 // handle le scan 2753 switch(hci_stack->le_scanning_state){ 2754 case LE_START_SCAN: 2755 hci_stack->le_scanning_state = LE_SCANNING; 2756 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2757 return; 2758 2759 case LE_STOP_SCAN: 2760 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2761 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2762 return; 2763 default: 2764 break; 2765 } 2766 if (hci_stack->le_scan_type != 0xff){ 2767 // defaults: active scanning, accept all advertisement packets 2768 int scan_type = hci_stack->le_scan_type; 2769 hci_stack->le_scan_type = 0xff; 2770 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); 2771 return; 2772 } 2773 #endif 2774 #ifdef ENABLE_LE_PERIPHERAL 2775 // le advertisement control 2776 if (hci_stack->le_advertisements_todo){ 2777 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2778 } 2779 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2780 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2781 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2782 return; 2783 } 2784 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2785 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2786 hci_send_cmd(&hci_le_set_advertising_parameters, 2787 hci_stack->le_advertisements_interval_min, 2788 hci_stack->le_advertisements_interval_max, 2789 hci_stack->le_advertisements_type, 2790 hci_stack->le_own_addr_type, 2791 hci_stack->le_advertisements_direct_address_type, 2792 hci_stack->le_advertisements_direct_address, 2793 hci_stack->le_advertisements_channel_map, 2794 hci_stack->le_advertisements_filter_policy); 2795 return; 2796 } 2797 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2798 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2799 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, hci_stack->le_advertisements_data); 2800 return; 2801 } 2802 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2803 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2804 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2805 hci_stack->le_scan_response_data); 2806 return; 2807 } 2808 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2809 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2810 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2811 return; 2812 } 2813 #endif 2814 2815 #ifdef ENABLE_LE_CENTRAL 2816 // 2817 // LE Whitelist Management 2818 // 2819 2820 // check if whitelist needs modification 2821 btstack_linked_list_iterator_t lit; 2822 int modification_pending = 0; 2823 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2824 while (btstack_linked_list_iterator_has_next(&lit)){ 2825 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2826 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2827 modification_pending = 1; 2828 break; 2829 } 2830 } 2831 2832 if (modification_pending){ 2833 // stop connnecting if modification pending 2834 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2835 hci_send_cmd(&hci_le_create_connection_cancel); 2836 return; 2837 } 2838 2839 // add/remove entries 2840 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2841 while (btstack_linked_list_iterator_has_next(&lit)){ 2842 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2843 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2844 entry->state = LE_WHITELIST_ON_CONTROLLER; 2845 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2846 return; 2847 2848 } 2849 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2850 bd_addr_t address; 2851 bd_addr_type_t address_type = entry->address_type; 2852 memcpy(address, entry->address, 6); 2853 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2854 btstack_memory_whitelist_entry_free(entry); 2855 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2856 return; 2857 } 2858 } 2859 } 2860 2861 // start connecting 2862 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2863 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2864 bd_addr_t null_addr; 2865 memset(null_addr, 0, 6); 2866 hci_send_cmd(&hci_le_create_connection, 2867 0x0060, // scan interval: 60 ms 2868 0x0030, // scan interval: 30 ms 2869 1, // use whitelist 2870 0, // peer address type 2871 null_addr, // peer bd addr 2872 hci_stack->le_own_addr_type, // our addr type: 2873 0x0008, // conn interval min 2874 0x0018, // conn interval max 2875 0, // conn latency 2876 0x0048, // supervision timeout 2877 0x0001, // min ce length 2878 0x0001 // max ce length 2879 ); 2880 return; 2881 } 2882 #endif 2883 } 2884 #endif 2885 2886 // send pending HCI commands 2887 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2888 hci_connection_t * connection = (hci_connection_t *) it; 2889 2890 switch(connection->state){ 2891 case SEND_CREATE_CONNECTION: 2892 switch(connection->address_type){ 2893 #ifdef ENABLE_CLASSIC 2894 case BD_ADDR_TYPE_CLASSIC: 2895 log_info("sending hci_create_connection"); 2896 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2897 break; 2898 #endif 2899 default: 2900 #ifdef ENABLE_BLE 2901 #ifdef ENABLE_LE_CENTRAL 2902 log_info("sending hci_le_create_connection"); 2903 hci_send_cmd(&hci_le_create_connection, 2904 0x0060, // scan interval: 60 ms 2905 0x0030, // scan interval: 30 ms 2906 0, // don't use whitelist 2907 connection->address_type, // peer address type 2908 connection->address, // peer bd addr 2909 hci_stack->le_own_addr_type, // our addr type: 2910 0x0008, // conn interval min 2911 0x0018, // conn interval max 2912 0, // conn latency 2913 0x0048, // supervision timeout 2914 0x0001, // min ce length 2915 0x0001 // max ce length 2916 ); 2917 2918 connection->state = SENT_CREATE_CONNECTION; 2919 #endif 2920 #endif 2921 break; 2922 } 2923 return; 2924 2925 #ifdef ENABLE_CLASSIC 2926 case RECEIVED_CONNECTION_REQUEST: 2927 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2928 connection->state = ACCEPTED_CONNECTION_REQUEST; 2929 connection->role = HCI_ROLE_SLAVE; 2930 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2931 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2932 } 2933 return; 2934 #endif 2935 2936 #ifdef ENABLE_BLE 2937 #ifdef ENABLE_LE_CENTRAL 2938 case SEND_CANCEL_CONNECTION: 2939 connection->state = SENT_CANCEL_CONNECTION; 2940 hci_send_cmd(&hci_le_create_connection_cancel); 2941 return; 2942 #endif 2943 #endif 2944 case SEND_DISCONNECT: 2945 connection->state = SENT_DISCONNECT; 2946 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2947 return; 2948 2949 default: 2950 break; 2951 } 2952 2953 #ifdef ENABLE_CLASSIC 2954 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2955 log_info("responding to link key request"); 2956 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2957 link_key_t link_key; 2958 link_key_type_t link_key_type; 2959 if ( hci_stack->link_key_db 2960 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2961 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2962 connection->link_key_type = link_key_type; 2963 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2964 } else { 2965 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2966 } 2967 return; 2968 } 2969 2970 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2971 log_info("denying to pin request"); 2972 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2973 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2974 return; 2975 } 2976 2977 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2978 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2979 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2980 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2981 // tweak authentication requirements 2982 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2983 if (connection->bonding_flags & BONDING_DEDICATED){ 2984 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2985 } 2986 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2987 authreq |= 1; 2988 } 2989 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2990 } else { 2991 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2992 } 2993 return; 2994 } 2995 2996 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2997 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2998 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2999 return; 3000 } 3001 3002 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3003 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3004 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3005 return; 3006 } 3007 3008 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3009 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3010 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3011 return; 3012 } 3013 3014 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3015 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3016 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3017 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3018 return; 3019 } 3020 3021 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3022 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3023 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3024 return; 3025 } 3026 3027 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3028 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3029 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3030 return; 3031 } 3032 #endif 3033 3034 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3035 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3036 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3037 return; 3038 } 3039 3040 #ifdef ENABLE_BLE 3041 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 3042 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3043 3044 uint16_t connection_interval_min = connection->le_conn_interval_min; 3045 connection->le_conn_interval_min = 0; 3046 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 3047 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3048 0x0000, 0xffff); 3049 } 3050 #endif 3051 } 3052 3053 hci_connection_t * connection; 3054 switch (hci_stack->state){ 3055 case HCI_STATE_INITIALIZING: 3056 hci_initializing_run(); 3057 break; 3058 3059 case HCI_STATE_HALTING: 3060 3061 log_info("HCI_STATE_HALTING"); 3062 3063 // free whitelist entries 3064 #ifdef ENABLE_BLE 3065 #ifdef ENABLE_LE_CENTRAL 3066 { 3067 btstack_linked_list_iterator_t lit; 3068 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3069 while (btstack_linked_list_iterator_has_next(&lit)){ 3070 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3071 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3072 btstack_memory_whitelist_entry_free(entry); 3073 } 3074 } 3075 #endif 3076 #endif 3077 // close all open connections 3078 connection = (hci_connection_t *) hci_stack->connections; 3079 if (connection){ 3080 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3081 if (!hci_can_send_command_packet_now()) return; 3082 3083 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3084 3085 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3086 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3087 3088 // ... which would be ignored anyway as we shutdown (free) the connection now 3089 hci_shutdown_connection(connection); 3090 3091 // finally, send the disconnect command 3092 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3093 return; 3094 } 3095 log_info("HCI_STATE_HALTING, calling off"); 3096 3097 // switch mode 3098 hci_power_control_off(); 3099 3100 log_info("HCI_STATE_HALTING, emitting state"); 3101 hci_emit_state(); 3102 log_info("HCI_STATE_HALTING, done"); 3103 break; 3104 3105 case HCI_STATE_FALLING_ASLEEP: 3106 switch(hci_stack->substate) { 3107 case HCI_FALLING_ASLEEP_DISCONNECT: 3108 log_info("HCI_STATE_FALLING_ASLEEP"); 3109 // close all open connections 3110 connection = (hci_connection_t *) hci_stack->connections; 3111 3112 #ifdef HAVE_PLATFORM_IPHONE_OS 3113 // don't close connections, if H4 supports power management 3114 if (btstack_control_iphone_power_management_enabled()){ 3115 connection = NULL; 3116 } 3117 #endif 3118 if (connection){ 3119 3120 // send disconnect 3121 if (!hci_can_send_command_packet_now()) return; 3122 3123 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3124 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3125 3126 // send disconnected event right away - causes higher layer connections to get closed, too. 3127 hci_shutdown_connection(connection); 3128 return; 3129 } 3130 3131 if (hci_classic_supported()){ 3132 // disable page and inquiry scan 3133 if (!hci_can_send_command_packet_now()) return; 3134 3135 log_info("HCI_STATE_HALTING, disabling inq scans"); 3136 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3137 3138 // continue in next sub state 3139 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3140 break; 3141 } 3142 // no break - fall through for ble-only chips 3143 3144 case HCI_FALLING_ASLEEP_COMPLETE: 3145 log_info("HCI_STATE_HALTING, calling sleep"); 3146 #ifdef HAVE_PLATFORM_IPHONE_OS 3147 // don't actually go to sleep, if H4 supports power management 3148 if (btstack_control_iphone_power_management_enabled()){ 3149 // SLEEP MODE reached 3150 hci_stack->state = HCI_STATE_SLEEPING; 3151 hci_emit_state(); 3152 break; 3153 } 3154 #endif 3155 // switch mode 3156 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3157 hci_emit_state(); 3158 break; 3159 3160 default: 3161 break; 3162 } 3163 break; 3164 3165 default: 3166 break; 3167 } 3168 } 3169 3170 int hci_send_cmd_packet(uint8_t *packet, int size){ 3171 // house-keeping 3172 3173 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3174 hci_stack->loopback_mode = packet[3]; 3175 } 3176 3177 #ifdef ENABLE_CLASSIC 3178 bd_addr_t addr; 3179 hci_connection_t * conn; 3180 3181 // create_connection? 3182 if (IS_COMMAND(packet, hci_create_connection)){ 3183 reverse_bd_addr(&packet[3], addr); 3184 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3185 3186 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3187 if (!conn){ 3188 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3189 if (!conn){ 3190 // notify client that alloc failed 3191 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3192 return 0; // don't sent packet to controller 3193 } 3194 conn->state = SEND_CREATE_CONNECTION; 3195 } 3196 log_info("conn state %u", conn->state); 3197 switch (conn->state){ 3198 // if connection active exists 3199 case OPEN: 3200 // and OPEN, emit connection complete command, don't send to controller 3201 hci_emit_connection_complete(addr, conn->con_handle, 0); 3202 return 0; 3203 case SEND_CREATE_CONNECTION: 3204 // connection created by hci, e.g. dedicated bonding 3205 break; 3206 default: 3207 // otherwise, just ignore as it is already in the open process 3208 return 0; 3209 } 3210 conn->state = SENT_CREATE_CONNECTION; 3211 } 3212 3213 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3214 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3215 } 3216 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3217 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3218 } 3219 3220 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3221 if (hci_stack->link_key_db){ 3222 reverse_bd_addr(&packet[3], addr); 3223 hci_stack->link_key_db->delete_link_key(addr); 3224 } 3225 } 3226 3227 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3228 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3229 reverse_bd_addr(&packet[3], addr); 3230 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3231 if (conn){ 3232 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3233 } 3234 } 3235 3236 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3237 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3238 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3239 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3240 reverse_bd_addr(&packet[3], addr); 3241 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3242 if (conn){ 3243 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3244 } 3245 } 3246 3247 #ifdef ENABLE_SCO_OVER_HCI 3248 // setup_synchronous_connection? Voice setting at offset 22 3249 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3250 // TODO: compare to current setting if sco connection already active 3251 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3252 } 3253 // accept_synchronus_connection? Voice setting at offset 18 3254 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3255 // TODO: compare to current setting if sco connection already active 3256 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3257 } 3258 #endif 3259 #endif 3260 3261 #ifdef ENABLE_BLE 3262 #ifdef ENABLE_LE_PERIPHERAL 3263 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3264 hci_stack->le_random_address_set = 1; 3265 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3266 } 3267 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3268 hci_stack->le_advertisements_active = packet[3]; 3269 } 3270 #endif 3271 #ifdef ENABLE_LE_CENTRAL 3272 if (IS_COMMAND(packet, hci_le_create_connection)){ 3273 // white list used? 3274 uint8_t initiator_filter_policy = packet[7]; 3275 switch (initiator_filter_policy){ 3276 case 0: 3277 // whitelist not used 3278 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3279 break; 3280 case 1: 3281 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3282 break; 3283 default: 3284 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3285 break; 3286 } 3287 } 3288 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3289 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3290 } 3291 #endif 3292 #endif 3293 3294 hci_stack->num_cmd_packets--; 3295 3296 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3297 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3298 3299 // release packet buffer for synchronous transport implementations 3300 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3301 hci_stack->hci_packet_buffer_reserved = 0; 3302 } 3303 3304 return err; 3305 } 3306 3307 // disconnect because of security block 3308 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3309 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3310 if (!connection) return; 3311 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3312 } 3313 3314 3315 // Configure Secure Simple Pairing 3316 3317 #ifdef ENABLE_CLASSIC 3318 3319 // enable will enable SSP during init 3320 void gap_ssp_set_enable(int enable){ 3321 hci_stack->ssp_enable = enable; 3322 } 3323 3324 static int hci_local_ssp_activated(void){ 3325 return gap_ssp_supported() && hci_stack->ssp_enable; 3326 } 3327 3328 // if set, BTstack will respond to io capability request using authentication requirement 3329 void gap_ssp_set_io_capability(int io_capability){ 3330 hci_stack->ssp_io_capability = io_capability; 3331 } 3332 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3333 hci_stack->ssp_authentication_requirement = authentication_requirement; 3334 } 3335 3336 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3337 void gap_ssp_set_auto_accept(int auto_accept){ 3338 hci_stack->ssp_auto_accept = auto_accept; 3339 } 3340 #endif 3341 3342 // va_list part of hci_send_cmd 3343 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3344 if (!hci_can_send_command_packet_now()){ 3345 log_error("hci_send_cmd called but cannot send packet now"); 3346 return 0; 3347 } 3348 3349 // for HCI INITIALIZATION 3350 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3351 hci_stack->last_cmd_opcode = cmd->opcode; 3352 3353 hci_reserve_packet_buffer(); 3354 uint8_t * packet = hci_stack->hci_packet_buffer; 3355 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3356 return hci_send_cmd_packet(packet, size); 3357 } 3358 3359 /** 3360 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3361 */ 3362 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3363 va_list argptr; 3364 va_start(argptr, cmd); 3365 int res = hci_send_cmd_va_arg(cmd, argptr); 3366 va_end(argptr); 3367 return res; 3368 } 3369 3370 // Create various non-HCI events. 3371 // TODO: generalize, use table similar to hci_create_command 3372 3373 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3374 // dump packet 3375 if (dump) { 3376 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3377 } 3378 3379 // dispatch to all event handlers 3380 btstack_linked_list_iterator_t it; 3381 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3382 while (btstack_linked_list_iterator_has_next(&it)){ 3383 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3384 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3385 } 3386 } 3387 3388 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3389 if (!hci_stack->acl_packet_handler) return; 3390 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3391 } 3392 3393 #ifdef ENABLE_CLASSIC 3394 static void hci_notify_if_sco_can_send_now(void){ 3395 // notify SCO sender if waiting 3396 if (!hci_stack->sco_waiting_for_can_send_now) return; 3397 if (hci_can_send_sco_packet_now()){ 3398 hci_stack->sco_waiting_for_can_send_now = 0; 3399 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3400 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3401 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3402 } 3403 } 3404 #endif 3405 3406 void hci_emit_state(void){ 3407 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3408 uint8_t event[3]; 3409 event[0] = BTSTACK_EVENT_STATE; 3410 event[1] = sizeof(event) - 2; 3411 event[2] = hci_stack->state; 3412 hci_emit_event(event, sizeof(event), 1); 3413 } 3414 3415 #ifdef ENABLE_CLASSIC 3416 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3417 uint8_t event[13]; 3418 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3419 event[1] = sizeof(event) - 2; 3420 event[2] = status; 3421 little_endian_store_16(event, 3, con_handle); 3422 reverse_bd_addr(address, &event[5]); 3423 event[11] = 1; // ACL connection 3424 event[12] = 0; // encryption disabled 3425 hci_emit_event(event, sizeof(event), 1); 3426 } 3427 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3428 if (disable_l2cap_timeouts) return; 3429 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3430 uint8_t event[4]; 3431 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3432 event[1] = sizeof(event) - 2; 3433 little_endian_store_16(event, 2, conn->con_handle); 3434 hci_emit_event(event, sizeof(event), 1); 3435 } 3436 #endif 3437 3438 #ifdef ENABLE_BLE 3439 #ifdef ENABLE_LE_CENTRAL 3440 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3441 uint8_t event[21]; 3442 event[0] = HCI_EVENT_LE_META; 3443 event[1] = sizeof(event) - 2; 3444 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3445 event[3] = status; 3446 little_endian_store_16(event, 4, con_handle); 3447 event[6] = 0; // TODO: role 3448 event[7] = address_type; 3449 reverse_bd_addr(address, &event[8]); 3450 little_endian_store_16(event, 14, 0); // interval 3451 little_endian_store_16(event, 16, 0); // latency 3452 little_endian_store_16(event, 18, 0); // supervision timeout 3453 event[20] = 0; // master clock accuracy 3454 hci_emit_event(event, sizeof(event), 1); 3455 } 3456 #endif 3457 #endif 3458 3459 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3460 uint8_t event[6]; 3461 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3462 event[1] = sizeof(event) - 2; 3463 event[2] = 0; // status = OK 3464 little_endian_store_16(event, 3, con_handle); 3465 event[5] = reason; 3466 hci_emit_event(event, sizeof(event), 1); 3467 } 3468 3469 static void hci_emit_nr_connections_changed(void){ 3470 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3471 uint8_t event[3]; 3472 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3473 event[1] = sizeof(event) - 2; 3474 event[2] = nr_hci_connections(); 3475 hci_emit_event(event, sizeof(event), 1); 3476 } 3477 3478 static void hci_emit_hci_open_failed(void){ 3479 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3480 uint8_t event[2]; 3481 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3482 event[1] = sizeof(event) - 2; 3483 hci_emit_event(event, sizeof(event), 1); 3484 } 3485 3486 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3487 log_info("hci_emit_dedicated_bonding_result %u ", status); 3488 uint8_t event[9]; 3489 int pos = 0; 3490 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3491 event[pos++] = sizeof(event) - 2; 3492 event[pos++] = status; 3493 reverse_bd_addr(address, &event[pos]); 3494 hci_emit_event(event, sizeof(event), 1); 3495 } 3496 3497 3498 #ifdef ENABLE_CLASSIC 3499 3500 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3501 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3502 uint8_t event[5]; 3503 int pos = 0; 3504 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3505 event[pos++] = sizeof(event) - 2; 3506 little_endian_store_16(event, 2, con_handle); 3507 pos += 2; 3508 event[pos++] = level; 3509 hci_emit_event(event, sizeof(event), 1); 3510 } 3511 3512 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3513 if (!connection) return LEVEL_0; 3514 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3515 return gap_security_level_for_link_key_type(connection->link_key_type); 3516 } 3517 3518 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3519 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3520 uint8_t event[3]; 3521 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3522 event[1] = sizeof(event) - 2; 3523 event[2] = enabled; 3524 hci_emit_event(event, sizeof(event), 1); 3525 } 3526 3527 #ifdef ENABLE_CLASSIC 3528 // query if remote side supports eSCO 3529 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3530 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3531 if (!connection) return 0; 3532 return connection->remote_supported_feature_eSCO; 3533 } 3534 3535 // query if remote side supports SSP 3536 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3537 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3538 if (!connection) return 0; 3539 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3540 } 3541 3542 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3543 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3544 } 3545 #endif 3546 3547 // GAP API 3548 /** 3549 * @bbrief enable/disable bonding. default is enabled 3550 * @praram enabled 3551 */ 3552 void gap_set_bondable_mode(int enable){ 3553 hci_stack->bondable = enable ? 1 : 0; 3554 } 3555 /** 3556 * @brief Get bondable mode. 3557 * @return 1 if bondable 3558 */ 3559 int gap_get_bondable_mode(void){ 3560 return hci_stack->bondable; 3561 } 3562 3563 /** 3564 * @brief map link keys to security levels 3565 */ 3566 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3567 switch (link_key_type){ 3568 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3569 return LEVEL_4; 3570 case COMBINATION_KEY: 3571 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3572 return LEVEL_3; 3573 default: 3574 return LEVEL_2; 3575 } 3576 } 3577 3578 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3579 log_info("gap_mitm_protection_required_for_security_level %u", level); 3580 return level > LEVEL_2; 3581 } 3582 3583 /** 3584 * @brief get current security level 3585 */ 3586 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3587 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3588 if (!connection) return LEVEL_0; 3589 return gap_security_level_for_connection(connection); 3590 } 3591 3592 /** 3593 * @brief request connection to device to 3594 * @result GAP_AUTHENTICATION_RESULT 3595 */ 3596 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3597 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3598 if (!connection){ 3599 hci_emit_security_level(con_handle, LEVEL_0); 3600 return; 3601 } 3602 gap_security_level_t current_level = gap_security_level(con_handle); 3603 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3604 if (current_level >= requested_level){ 3605 hci_emit_security_level(con_handle, current_level); 3606 return; 3607 } 3608 3609 connection->requested_security_level = requested_level; 3610 3611 #if 0 3612 // sending encryption request without a link key results in an error. 3613 // TODO: figure out how to use it properly 3614 3615 // would enabling ecnryption suffice (>= LEVEL_2)? 3616 if (hci_stack->link_key_db){ 3617 link_key_type_t link_key_type; 3618 link_key_t link_key; 3619 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3620 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3621 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3622 return; 3623 } 3624 } 3625 } 3626 #endif 3627 3628 // try to authenticate connection 3629 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3630 hci_run(); 3631 } 3632 3633 /** 3634 * @brief start dedicated bonding with device. disconnect after bonding 3635 * @param device 3636 * @param request MITM protection 3637 * @result GAP_DEDICATED_BONDING_COMPLETE 3638 */ 3639 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3640 3641 // create connection state machine 3642 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3643 3644 if (!connection){ 3645 return BTSTACK_MEMORY_ALLOC_FAILED; 3646 } 3647 3648 // delete linkn key 3649 gap_drop_link_key_for_bd_addr(device); 3650 3651 // configure LEVEL_2/3, dedicated bonding 3652 connection->state = SEND_CREATE_CONNECTION; 3653 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3654 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3655 connection->bonding_flags = BONDING_DEDICATED; 3656 3657 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3658 3659 // handle: connnection failure (connection complete != ok) 3660 // handle: authentication failure 3661 // handle: disconnect on done 3662 3663 hci_run(); 3664 3665 return 0; 3666 } 3667 #endif 3668 3669 void gap_set_local_name(const char * local_name){ 3670 hci_stack->local_name = local_name; 3671 } 3672 3673 3674 #ifdef ENABLE_BLE 3675 3676 #ifdef ENABLE_LE_CENTRAL 3677 void gap_start_scan(void){ 3678 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3679 hci_stack->le_scanning_state = LE_START_SCAN; 3680 hci_run(); 3681 } 3682 3683 void gap_stop_scan(void){ 3684 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3685 hci_stack->le_scanning_state = LE_STOP_SCAN; 3686 hci_run(); 3687 } 3688 3689 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3690 hci_stack->le_scan_type = scan_type; 3691 hci_stack->le_scan_interval = scan_interval; 3692 hci_stack->le_scan_window = scan_window; 3693 hci_run(); 3694 } 3695 3696 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3697 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3698 if (!conn){ 3699 log_info("gap_connect: no connection exists yet, creating context"); 3700 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3701 if (!conn){ 3702 // notify client that alloc failed 3703 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3704 log_info("gap_connect: failed to alloc hci_connection_t"); 3705 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3706 } 3707 conn->state = SEND_CREATE_CONNECTION; 3708 log_info("gap_connect: send create connection next"); 3709 hci_run(); 3710 return 0; 3711 } 3712 3713 if (!hci_is_le_connection(conn) || 3714 conn->state == SEND_CREATE_CONNECTION || 3715 conn->state == SENT_CREATE_CONNECTION) { 3716 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3717 log_error("gap_connect: classic connection or connect is already being created"); 3718 return GATT_CLIENT_IN_WRONG_STATE; 3719 } 3720 3721 log_info("gap_connect: context exists with state %u", conn->state); 3722 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3723 hci_run(); 3724 return 0; 3725 } 3726 3727 // @assumption: only a single outgoing LE Connection exists 3728 static hci_connection_t * gap_get_outgoing_connection(void){ 3729 btstack_linked_item_t *it; 3730 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3731 hci_connection_t * conn = (hci_connection_t *) it; 3732 if (!hci_is_le_connection(conn)) continue; 3733 switch (conn->state){ 3734 case SEND_CREATE_CONNECTION: 3735 case SENT_CREATE_CONNECTION: 3736 return conn; 3737 default: 3738 break; 3739 }; 3740 } 3741 return NULL; 3742 } 3743 3744 uint8_t gap_connect_cancel(void){ 3745 hci_connection_t * conn = gap_get_outgoing_connection(); 3746 if (!conn) return 0; 3747 switch (conn->state){ 3748 case SEND_CREATE_CONNECTION: 3749 // skip sending create connection and emit event instead 3750 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3751 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3752 btstack_memory_hci_connection_free( conn ); 3753 break; 3754 case SENT_CREATE_CONNECTION: 3755 // request to send cancel connection 3756 conn->state = SEND_CANCEL_CONNECTION; 3757 hci_run(); 3758 break; 3759 default: 3760 break; 3761 } 3762 return 0; 3763 } 3764 #endif 3765 3766 /** 3767 * @brief Updates the connection parameters for a given LE connection 3768 * @param handle 3769 * @param conn_interval_min (unit: 1.25ms) 3770 * @param conn_interval_max (unit: 1.25ms) 3771 * @param conn_latency 3772 * @param supervision_timeout (unit: 10ms) 3773 * @returns 0 if ok 3774 */ 3775 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3776 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3777 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3778 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3779 connection->le_conn_interval_min = conn_interval_min; 3780 connection->le_conn_interval_max = conn_interval_max; 3781 connection->le_conn_latency = conn_latency; 3782 connection->le_supervision_timeout = supervision_timeout; 3783 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3784 hci_run(); 3785 return 0; 3786 } 3787 3788 /** 3789 * @brief Request an update of the connection parameter for a given LE connection 3790 * @param handle 3791 * @param conn_interval_min (unit: 1.25ms) 3792 * @param conn_interval_max (unit: 1.25ms) 3793 * @param conn_latency 3794 * @param supervision_timeout (unit: 10ms) 3795 * @returns 0 if ok 3796 */ 3797 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3798 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3799 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3800 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3801 connection->le_conn_interval_min = conn_interval_min; 3802 connection->le_conn_interval_max = conn_interval_max; 3803 connection->le_conn_latency = conn_latency; 3804 connection->le_supervision_timeout = supervision_timeout; 3805 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3806 hci_run(); 3807 return 0; 3808 } 3809 3810 #ifdef ENABLE_LE_PERIPHERAL 3811 3812 static void gap_advertisments_changed(void){ 3813 // disable advertisements before updating adv, scan data, or adv params 3814 if (hci_stack->le_advertisements_active){ 3815 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3816 } 3817 hci_run(); 3818 } 3819 3820 /** 3821 * @brief Set Advertisement Data 3822 * @param advertising_data_length 3823 * @param advertising_data (max 31 octets) 3824 * @note data is not copied, pointer has to stay valid 3825 */ 3826 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3827 hci_stack->le_advertisements_data_len = advertising_data_length; 3828 hci_stack->le_advertisements_data = advertising_data; 3829 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3830 gap_advertisments_changed(); 3831 } 3832 3833 /** 3834 * @brief Set Scan Response Data 3835 * @param advertising_data_length 3836 * @param advertising_data (max 31 octets) 3837 * @note data is not copied, pointer has to stay valid 3838 */ 3839 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3840 hci_stack->le_scan_response_data_len = scan_response_data_length; 3841 hci_stack->le_scan_response_data = scan_response_data; 3842 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3843 gap_advertisments_changed(); 3844 } 3845 3846 /** 3847 * @brief Set Advertisement Parameters 3848 * @param adv_int_min 3849 * @param adv_int_max 3850 * @param adv_type 3851 * @param direct_address_type 3852 * @param direct_address 3853 * @param channel_map 3854 * @param filter_policy 3855 * 3856 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3857 */ 3858 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3859 uint8_t direct_address_typ, bd_addr_t direct_address, 3860 uint8_t channel_map, uint8_t filter_policy) { 3861 3862 hci_stack->le_advertisements_interval_min = adv_int_min; 3863 hci_stack->le_advertisements_interval_max = adv_int_max; 3864 hci_stack->le_advertisements_type = adv_type; 3865 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3866 hci_stack->le_advertisements_channel_map = channel_map; 3867 hci_stack->le_advertisements_filter_policy = filter_policy; 3868 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3869 3870 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3871 gap_advertisments_changed(); 3872 } 3873 3874 /** 3875 * @brief Enable/Disable Advertisements 3876 * @param enabled 3877 */ 3878 void gap_advertisements_enable(int enabled){ 3879 hci_stack->le_advertisements_enabled = enabled; 3880 if (enabled && !hci_stack->le_advertisements_active){ 3881 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3882 } 3883 if (!enabled && hci_stack->le_advertisements_active){ 3884 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3885 } 3886 hci_run(); 3887 } 3888 3889 #endif 3890 3891 void hci_le_set_own_address_type(uint8_t own_address_type){ 3892 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 3893 if (own_address_type == hci_stack->le_own_addr_type) return; 3894 hci_stack->le_own_addr_type = own_address_type; 3895 3896 #ifdef ENABLE_LE_PERIPHERAL 3897 // update advertisement parameters, too 3898 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3899 gap_advertisments_changed(); 3900 #endif 3901 #ifdef ENABLE_LE_CENTRAL 3902 // note: we don't update scan parameters or modify ongoing connection attempts 3903 #endif 3904 } 3905 3906 #endif 3907 3908 uint8_t gap_disconnect(hci_con_handle_t handle){ 3909 hci_connection_t * conn = hci_connection_for_handle(handle); 3910 if (!conn){ 3911 hci_emit_disconnection_complete(handle, 0); 3912 return 0; 3913 } 3914 conn->state = SEND_DISCONNECT; 3915 hci_run(); 3916 return 0; 3917 } 3918 3919 /** 3920 * @brief Get connection type 3921 * @param con_handle 3922 * @result connection_type 3923 */ 3924 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3925 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3926 if (!conn) return GAP_CONNECTION_INVALID; 3927 switch (conn->address_type){ 3928 case BD_ADDR_TYPE_LE_PUBLIC: 3929 case BD_ADDR_TYPE_LE_RANDOM: 3930 return GAP_CONNECTION_LE; 3931 case BD_ADDR_TYPE_SCO: 3932 return GAP_CONNECTION_SCO; 3933 case BD_ADDR_TYPE_CLASSIC: 3934 return GAP_CONNECTION_ACL; 3935 default: 3936 return GAP_CONNECTION_INVALID; 3937 } 3938 } 3939 3940 #ifdef ENABLE_BLE 3941 3942 #ifdef ENABLE_LE_CENTRAL 3943 /** 3944 * @brief Auto Connection Establishment - Start Connecting to device 3945 * @param address_typ 3946 * @param address 3947 * @returns 0 if ok 3948 */ 3949 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3950 // check capacity 3951 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3952 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3953 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3954 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3955 entry->address_type = address_type; 3956 memcpy(entry->address, address, 6); 3957 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3958 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3959 hci_run(); 3960 return 0; 3961 } 3962 3963 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3964 btstack_linked_list_iterator_t it; 3965 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3966 while (btstack_linked_list_iterator_has_next(&it)){ 3967 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3968 if (entry->address_type != address_type) continue; 3969 if (memcmp(entry->address, address, 6) != 0) continue; 3970 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3971 // remove from controller if already present 3972 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3973 continue; 3974 } 3975 // direclty remove entry from whitelist 3976 btstack_linked_list_iterator_remove(&it); 3977 btstack_memory_whitelist_entry_free(entry); 3978 } 3979 } 3980 3981 /** 3982 * @brief Auto Connection Establishment - Stop Connecting to device 3983 * @param address_typ 3984 * @param address 3985 * @returns 0 if ok 3986 */ 3987 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3988 hci_remove_from_whitelist(address_type, address); 3989 hci_run(); 3990 return 0; 3991 } 3992 3993 /** 3994 * @brief Auto Connection Establishment - Stop everything 3995 * @note Convenience function to stop all active auto connection attempts 3996 */ 3997 void gap_auto_connection_stop_all(void){ 3998 btstack_linked_list_iterator_t it; 3999 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4000 while (btstack_linked_list_iterator_has_next(&it)){ 4001 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4002 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4003 // remove from controller if already present 4004 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4005 continue; 4006 } 4007 // directly remove entry from whitelist 4008 btstack_linked_list_iterator_remove(&it); 4009 btstack_memory_whitelist_entry_free(entry); 4010 } 4011 hci_run(); 4012 } 4013 #endif 4014 #endif 4015 4016 #ifdef ENABLE_CLASSIC 4017 /** 4018 * @brief Set Extended Inquiry Response data 4019 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4020 * @note has to be done before stack starts up 4021 */ 4022 void gap_set_extended_inquiry_response(const uint8_t * data){ 4023 hci_stack->eir_data = data; 4024 } 4025 4026 /** 4027 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4028 * @param inquriy_mode see bluetooth_defines.h 4029 */ 4030 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4031 hci_stack->inquiry_mode = mode; 4032 } 4033 4034 /** 4035 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4036 */ 4037 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4038 hci_stack->sco_voice_setting = voice_setting; 4039 } 4040 4041 /** 4042 * @brief Get SCO Voice Setting 4043 * @return current voice setting 4044 */ 4045 uint16_t hci_get_sco_voice_setting(void){ 4046 return hci_stack->sco_voice_setting; 4047 } 4048 4049 /** @brief Get SCO packet length for current SCO Voice setting 4050 * @note Using SCO packets of the exact length is required for USB transfer 4051 * @return Length of SCO packets in bytes (not audio frames) 4052 */ 4053 int hci_get_sco_packet_length(void){ 4054 // see Core Spec for H2 USB Transfer. 4055 if (hci_stack->sco_voice_setting & 0x0020) return 51; 4056 return 27; 4057 } 4058 #endif 4059 4060 /** 4061 * @brief Set callback for Bluetooth Hardware Error 4062 */ 4063 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4064 hci_stack->hardware_error_callback = fn; 4065 } 4066 4067 void hci_disconnect_all(void){ 4068 btstack_linked_list_iterator_t it; 4069 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4070 while (btstack_linked_list_iterator_has_next(&it)){ 4071 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4072 if (con->state == SENT_DISCONNECT) continue; 4073 con->state = SEND_DISCONNECT; 4074 } 4075 hci_run(); 4076 } 4077 4078 uint16_t hci_get_manufacturer(void){ 4079 return hci_stack->manufacturer; 4080 } 4081