1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 #define HCI_RESET_RESEND_TIMEOUT_MS 200 98 99 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 100 #ifndef GAP_INQUIRY_MAX_NAME_LEN 101 #define GAP_INQUIRY_MAX_NAME_LEN 32 102 #endif 103 104 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 105 #define GAP_INQUIRY_DURATION_MIN 0x01 106 #define GAP_INQUIRY_DURATION_MAX 0x30 107 #define GAP_INQUIRY_STATE_ACTIVE 0x80 108 #define GAP_INQUIRY_STATE_IDLE 0 109 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 110 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 111 112 // GAP Remote Name Request 113 #define GAP_REMOTE_NAME_STATE_IDLE 0 114 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 115 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 116 117 // prototypes 118 #ifdef ENABLE_CLASSIC 119 static void hci_update_scan_enable(void); 120 static void hci_emit_discoverable_enabled(uint8_t enabled); 121 static int hci_local_ssp_activated(void); 122 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 123 static void hci_notify_if_sco_can_send_now(void); 124 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 125 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 126 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 127 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 128 static void hci_connection_timestamp(hci_connection_t *connection); 129 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 130 static void gap_inquiry_explode(uint8_t * packet); 131 #endif 132 133 static int hci_power_control_on(void); 134 static void hci_power_control_off(void); 135 static void hci_state_reset(void); 136 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 137 static void hci_emit_nr_connections_changed(void); 138 static void hci_emit_hci_open_failed(void); 139 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 140 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 141 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 142 static void hci_run(void); 143 static int hci_is_le_connection(hci_connection_t * connection); 144 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 145 146 #ifdef ENABLE_BLE 147 #ifdef ENABLE_LE_CENTRAL 148 // called from test/ble_client/advertising_data_parser.c 149 void le_handle_advertisement_report(uint8_t *packet, int size); 150 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 151 #endif 152 #endif 153 154 // the STACK is here 155 #ifndef HAVE_MALLOC 156 static hci_stack_t hci_stack_static; 157 #endif 158 static hci_stack_t * hci_stack = NULL; 159 160 #ifdef ENABLE_CLASSIC 161 // test helper 162 static uint8_t disable_l2cap_timeouts = 0; 163 #endif 164 165 /** 166 * create connection for given address 167 * 168 * @return connection OR NULL, if no memory left 169 */ 170 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 171 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 172 hci_connection_t * conn = btstack_memory_hci_connection_get(); 173 if (!conn) return NULL; 174 memset(conn, 0, sizeof(hci_connection_t)); 175 bd_addr_copy(conn->address, addr); 176 conn->address_type = addr_type; 177 conn->con_handle = 0xffff; 178 conn->authentication_flags = AUTH_FLAGS_NONE; 179 conn->bonding_flags = 0; 180 conn->requested_security_level = LEVEL_0; 181 #ifdef ENABLE_CLASSIC 182 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 183 btstack_run_loop_set_timer_context(&conn->timeout, conn); 184 hci_connection_timestamp(conn); 185 #endif 186 conn->acl_recombination_length = 0; 187 conn->acl_recombination_pos = 0; 188 conn->num_acl_packets_sent = 0; 189 conn->num_sco_packets_sent = 0; 190 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 191 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 192 return conn; 193 } 194 195 196 /** 197 * get le connection parameter range 198 * 199 * @return le connection parameter range struct 200 */ 201 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 202 *range = hci_stack->le_connection_parameter_range; 203 } 204 205 /** 206 * set le connection parameter range 207 * 208 */ 209 210 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 211 hci_stack->le_connection_parameter_range = *range; 212 } 213 214 /** 215 * get hci connections iterator 216 * 217 * @return hci connections iterator 218 */ 219 220 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 221 btstack_linked_list_iterator_init(it, &hci_stack->connections); 222 } 223 224 /** 225 * get connection for a given handle 226 * 227 * @return connection OR NULL, if not found 228 */ 229 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 230 btstack_linked_list_iterator_t it; 231 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 232 while (btstack_linked_list_iterator_has_next(&it)){ 233 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 234 if ( item->con_handle == con_handle ) { 235 return item; 236 } 237 } 238 return NULL; 239 } 240 241 /** 242 * get connection for given address 243 * 244 * @return connection OR NULL, if not found 245 */ 246 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 247 btstack_linked_list_iterator_t it; 248 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 249 while (btstack_linked_list_iterator_has_next(&it)){ 250 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 251 if (connection->address_type != addr_type) continue; 252 if (memcmp(addr, connection->address, 6) != 0) continue; 253 return connection; 254 } 255 return NULL; 256 } 257 258 259 #ifdef ENABLE_CLASSIC 260 261 #ifdef ENABLE_SCO_OVER_HCI 262 static int hci_number_sco_connections(void){ 263 int connections = 0; 264 btstack_linked_list_iterator_t it; 265 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 266 while (btstack_linked_list_iterator_has_next(&it)){ 267 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 268 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 269 connections++; 270 } 271 return connections; 272 } 273 #endif 274 275 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 276 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 277 #ifdef HAVE_EMBEDDED_TICK 278 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 279 // connections might be timed out 280 hci_emit_l2cap_check_timeout(connection); 281 } 282 #else 283 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 284 // connections might be timed out 285 hci_emit_l2cap_check_timeout(connection); 286 } 287 #endif 288 } 289 290 static void hci_connection_timestamp(hci_connection_t *connection){ 291 #ifdef HAVE_EMBEDDED_TICK 292 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 293 #else 294 connection->timestamp = btstack_run_loop_get_time_ms(); 295 #endif 296 } 297 298 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 299 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 300 } 301 302 303 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 304 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 305 } 306 307 /** 308 * add authentication flags and reset timer 309 * @note: assumes classic connection 310 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 311 */ 312 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 313 bd_addr_t addr; 314 reverse_bd_addr(bd_addr, addr); 315 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 316 if (conn) { 317 connectionSetAuthenticationFlags(conn, flags); 318 hci_connection_timestamp(conn); 319 } 320 } 321 322 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 323 hci_connection_t * conn = hci_connection_for_handle(handle); 324 if (!conn) return 0; 325 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 326 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 327 return 0; 328 } 329 330 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 331 if (!hci_stack->link_key_db) return; 332 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 333 hci_stack->link_key_db->delete_link_key(addr); 334 } 335 336 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 337 if (!hci_stack->link_key_db) return; 338 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 339 hci_stack->link_key_db->put_link_key(addr, link_key, type); 340 } 341 #endif 342 343 static int hci_is_le_connection(hci_connection_t * connection){ 344 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 345 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 346 } 347 348 /** 349 * count connections 350 */ 351 static int nr_hci_connections(void){ 352 int count = 0; 353 btstack_linked_item_t *it; 354 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 355 return count; 356 } 357 358 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 359 360 unsigned int num_packets_sent_classic = 0; 361 unsigned int num_packets_sent_le = 0; 362 363 btstack_linked_item_t *it; 364 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 365 hci_connection_t * connection = (hci_connection_t *) it; 366 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 367 num_packets_sent_classic += connection->num_acl_packets_sent; 368 } else { 369 num_packets_sent_le += connection->num_acl_packets_sent; 370 } 371 } 372 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 373 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 374 int free_slots_le = 0; 375 376 if (free_slots_classic < 0){ 377 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); 378 return 0; 379 } 380 381 if (hci_stack->le_acl_packets_total_num){ 382 // if we have LE slots, they are used 383 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 384 if (free_slots_le < 0){ 385 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); 386 return 0; 387 } 388 } else { 389 // otherwise, classic slots are used for LE, too 390 free_slots_classic -= num_packets_sent_le; 391 if (free_slots_classic < 0){ 392 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); 393 return 0; 394 } 395 } 396 397 switch (address_type){ 398 case BD_ADDR_TYPE_UNKNOWN: 399 log_error("hci_number_free_acl_slots: unknown address type"); 400 return 0; 401 402 case BD_ADDR_TYPE_CLASSIC: 403 return free_slots_classic; 404 405 default: 406 if (hci_stack->le_acl_packets_total_num){ 407 return free_slots_le; 408 } 409 return free_slots_classic; 410 } 411 } 412 413 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 414 // get connection type 415 hci_connection_t * connection = hci_connection_for_handle(con_handle); 416 if (!connection){ 417 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 418 return 0; 419 } 420 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 421 } 422 423 #ifdef ENABLE_CLASSIC 424 static int hci_number_free_sco_slots(void){ 425 unsigned int num_sco_packets_sent = 0; 426 btstack_linked_item_t *it; 427 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 428 hci_connection_t * connection = (hci_connection_t *) it; 429 num_sco_packets_sent += connection->num_sco_packets_sent; 430 } 431 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 432 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 433 return 0; 434 } 435 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 436 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 437 } 438 #endif 439 440 // only used to send HCI Host Number Completed Packets 441 static int hci_can_send_comand_packet_transport(void){ 442 if (hci_stack->hci_packet_buffer_reserved) return 0; 443 444 // check for async hci transport implementations 445 if (hci_stack->hci_transport->can_send_packet_now){ 446 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 447 return 0; 448 } 449 } 450 return 1; 451 } 452 453 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 454 int hci_can_send_command_packet_now(void){ 455 if (hci_can_send_comand_packet_transport() == 0) return 0; 456 return hci_stack->num_cmd_packets > 0; 457 } 458 459 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 460 // check for async hci transport implementations 461 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 462 return hci_stack->hci_transport->can_send_packet_now(packet_type); 463 } 464 465 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 466 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 467 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 468 } 469 470 int hci_can_send_acl_le_packet_now(void){ 471 if (hci_stack->hci_packet_buffer_reserved) return 0; 472 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 473 } 474 475 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 476 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 477 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 478 } 479 480 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 481 if (hci_stack->hci_packet_buffer_reserved) return 0; 482 return hci_can_send_prepared_acl_packet_now(con_handle); 483 } 484 485 #ifdef ENABLE_CLASSIC 486 int hci_can_send_acl_classic_packet_now(void){ 487 if (hci_stack->hci_packet_buffer_reserved) return 0; 488 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 489 } 490 491 int hci_can_send_prepared_sco_packet_now(void){ 492 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 493 if (!hci_stack->synchronous_flow_control_enabled) return 1; 494 return hci_number_free_sco_slots() > 0; 495 } 496 497 int hci_can_send_sco_packet_now(void){ 498 if (hci_stack->hci_packet_buffer_reserved) return 0; 499 return hci_can_send_prepared_sco_packet_now(); 500 } 501 502 void hci_request_sco_can_send_now_event(void){ 503 hci_stack->sco_waiting_for_can_send_now = 1; 504 hci_notify_if_sco_can_send_now(); 505 } 506 #endif 507 508 // used for internal checks in l2cap.c 509 int hci_is_packet_buffer_reserved(void){ 510 return hci_stack->hci_packet_buffer_reserved; 511 } 512 513 // reserves outgoing packet buffer. @returns 1 if successful 514 int hci_reserve_packet_buffer(void){ 515 if (hci_stack->hci_packet_buffer_reserved) { 516 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 517 return 0; 518 } 519 hci_stack->hci_packet_buffer_reserved = 1; 520 return 1; 521 } 522 523 void hci_release_packet_buffer(void){ 524 hci_stack->hci_packet_buffer_reserved = 0; 525 } 526 527 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 528 static int hci_transport_synchronous(void){ 529 return hci_stack->hci_transport->can_send_packet_now == NULL; 530 } 531 532 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 533 534 // 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); 535 536 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 537 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 538 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 539 max_acl_data_packet_length = hci_stack->le_data_packets_length; 540 } 541 542 // testing: reduce buffer to minimum 543 // max_acl_data_packet_length = 52; 544 545 log_debug("hci_send_acl_packet_fragments entered"); 546 547 int err; 548 // multiple packets could be send on a synchronous HCI transport 549 while (1){ 550 551 log_debug("hci_send_acl_packet_fragments loop entered"); 552 553 // get current data 554 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 555 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 556 int more_fragments = 0; 557 558 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 559 if (current_acl_data_packet_length > max_acl_data_packet_length){ 560 more_fragments = 1; 561 current_acl_data_packet_length = max_acl_data_packet_length; 562 } 563 564 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 565 if (acl_header_pos > 0){ 566 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 567 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 568 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 569 } 570 571 // update header len 572 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 573 574 // count packet 575 connection->num_acl_packets_sent++; 576 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 577 578 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 579 if (more_fragments){ 580 // update start of next fragment to send 581 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 582 } else { 583 // done 584 hci_stack->acl_fragmentation_pos = 0; 585 hci_stack->acl_fragmentation_total_size = 0; 586 } 587 588 // send packet 589 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 590 const int size = current_acl_data_packet_length + 4; 591 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 592 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 593 594 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 595 596 // done yet? 597 if (!more_fragments) break; 598 599 // can send more? 600 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 601 } 602 603 log_debug("hci_send_acl_packet_fragments loop over"); 604 605 // release buffer now for synchronous transport 606 if (hci_transport_synchronous()){ 607 hci_release_packet_buffer(); 608 // notify upper stack that it might be possible to send again 609 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 610 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 611 } 612 613 return err; 614 } 615 616 // pre: caller has reserved the packet buffer 617 int hci_send_acl_packet_buffer(int size){ 618 619 // log_info("hci_send_acl_packet_buffer size %u", size); 620 621 if (!hci_stack->hci_packet_buffer_reserved) { 622 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 623 return 0; 624 } 625 626 uint8_t * packet = hci_stack->hci_packet_buffer; 627 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 628 629 // check for free places on Bluetooth module 630 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 631 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 632 hci_release_packet_buffer(); 633 return BTSTACK_ACL_BUFFERS_FULL; 634 } 635 636 hci_connection_t *connection = hci_connection_for_handle( con_handle); 637 if (!connection) { 638 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 639 hci_release_packet_buffer(); 640 return 0; 641 } 642 643 #ifdef ENABLE_CLASSIC 644 hci_connection_timestamp(connection); 645 #endif 646 647 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 648 649 // setup data 650 hci_stack->acl_fragmentation_total_size = size; 651 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 652 653 return hci_send_acl_packet_fragments(connection); 654 } 655 656 #ifdef ENABLE_CLASSIC 657 // pre: caller has reserved the packet buffer 658 int hci_send_sco_packet_buffer(int size){ 659 660 // log_info("hci_send_acl_packet_buffer size %u", size); 661 662 if (!hci_stack->hci_packet_buffer_reserved) { 663 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 664 return 0; 665 } 666 667 uint8_t * packet = hci_stack->hci_packet_buffer; 668 669 // skip checks in loopback mode 670 if (!hci_stack->loopback_mode){ 671 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 672 673 // check for free places on Bluetooth module 674 if (!hci_can_send_prepared_sco_packet_now()) { 675 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 676 hci_release_packet_buffer(); 677 return BTSTACK_ACL_BUFFERS_FULL; 678 } 679 680 // track send packet in connection struct 681 hci_connection_t *connection = hci_connection_for_handle( con_handle); 682 if (!connection) { 683 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 684 hci_release_packet_buffer(); 685 return 0; 686 } 687 connection->num_sco_packets_sent++; 688 } 689 690 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 691 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 692 693 if (hci_transport_synchronous()){ 694 hci_release_packet_buffer(); 695 // notify upper stack that it might be possible to send again 696 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 697 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 698 } 699 700 return err; 701 } 702 #endif 703 704 static void acl_handler(uint8_t *packet, int size){ 705 706 // log_info("acl_handler: size %u", size); 707 708 // get info 709 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 710 hci_connection_t *conn = hci_connection_for_handle(con_handle); 711 uint8_t acl_flags = READ_ACL_FLAGS(packet); 712 uint16_t acl_length = READ_ACL_LENGTH(packet); 713 714 // ignore non-registered handle 715 if (!conn){ 716 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 717 return; 718 } 719 720 // assert packet is complete 721 if (acl_length + 4 != size){ 722 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 723 return; 724 } 725 726 #ifdef ENABLE_CLASSIC 727 // update idle timestamp 728 hci_connection_timestamp(conn); 729 #endif 730 731 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 732 hci_stack->host_completed_packets = 1; 733 conn->num_packets_completed++; 734 #endif 735 736 // handle different packet types 737 switch (acl_flags & 0x03) { 738 739 case 0x01: // continuation fragment 740 741 // sanity checks 742 if (conn->acl_recombination_pos == 0) { 743 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 744 return; 745 } 746 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 747 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 748 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 749 conn->acl_recombination_pos = 0; 750 return; 751 } 752 753 // append fragment payload (header already stored) 754 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 755 conn->acl_recombination_pos += acl_length; 756 757 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 758 // conn->acl_recombination_pos, conn->acl_recombination_length); 759 760 // forward complete L2CAP packet if complete. 761 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 762 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 763 // reset recombination buffer 764 conn->acl_recombination_length = 0; 765 conn->acl_recombination_pos = 0; 766 } 767 break; 768 769 case 0x02: { // first fragment 770 771 // sanity check 772 if (conn->acl_recombination_pos) { 773 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 774 conn->acl_recombination_pos = 0; 775 } 776 777 // peek into L2CAP packet! 778 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 779 780 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 781 782 // compare fragment size to L2CAP packet size 783 if (acl_length >= l2cap_length + 4){ 784 // forward fragment as L2CAP packet 785 hci_emit_acl_packet(packet, acl_length + 4); 786 } else { 787 788 if (acl_length > HCI_ACL_BUFFER_SIZE){ 789 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 790 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 791 return; 792 } 793 794 // store first fragment and tweak acl length for complete package 795 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 796 conn->acl_recombination_pos = acl_length + 4; 797 conn->acl_recombination_length = l2cap_length; 798 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 799 } 800 break; 801 802 } 803 default: 804 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 805 return; 806 } 807 808 // execute main loop 809 hci_run(); 810 } 811 812 static void hci_shutdown_connection(hci_connection_t *conn){ 813 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 814 815 #ifdef ENABLE_CLASSIC 816 #ifdef ENABLE_SCO_OVER_HCI 817 int addr_type = conn->address_type; 818 #endif 819 #endif 820 821 btstack_run_loop_remove_timer(&conn->timeout); 822 823 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 824 btstack_memory_hci_connection_free( conn ); 825 826 // now it's gone 827 hci_emit_nr_connections_changed(); 828 829 #ifdef ENABLE_CLASSIC 830 #ifdef ENABLE_SCO_OVER_HCI 831 // update SCO 832 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 833 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 834 } 835 #endif 836 #endif 837 } 838 839 #ifdef ENABLE_CLASSIC 840 841 static const uint16_t packet_type_sizes[] = { 842 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 843 HCI_ACL_DH1_SIZE, 0, 0, 0, 844 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 845 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 846 }; 847 static const uint8_t packet_type_feature_requirement_bit[] = { 848 0, // 3 slot packets 849 1, // 5 slot packets 850 25, // EDR 2 mpbs 851 26, // EDR 3 mbps 852 39, // 3 slot EDR packts 853 40, // 5 slot EDR packet 854 }; 855 static const uint16_t packet_type_feature_packet_mask[] = { 856 0x0f00, // 3 slot packets 857 0xf000, // 5 slot packets 858 0x1102, // EDR 2 mpbs 859 0x2204, // EDR 3 mbps 860 0x0300, // 3 slot EDR packts 861 0x3000, // 5 slot EDR packet 862 }; 863 864 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 865 // enable packet types based on size 866 uint16_t packet_types = 0; 867 unsigned int i; 868 for (i=0;i<16;i++){ 869 if (packet_type_sizes[i] == 0) continue; 870 if (packet_type_sizes[i] <= buffer_size){ 871 packet_types |= 1 << i; 872 } 873 } 874 // disable packet types due to missing local supported features 875 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 876 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 877 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 878 if (feature_set) continue; 879 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 880 packet_types &= ~packet_type_feature_packet_mask[i]; 881 } 882 // flip bits for "may not be used" 883 packet_types ^= 0x3306; 884 return packet_types; 885 } 886 887 uint16_t hci_usable_acl_packet_types(void){ 888 return hci_stack->packet_types; 889 } 890 #endif 891 892 uint8_t* hci_get_outgoing_packet_buffer(void){ 893 // hci packet buffer is >= acl data packet length 894 return hci_stack->hci_packet_buffer; 895 } 896 897 uint16_t hci_max_acl_data_packet_length(void){ 898 return hci_stack->acl_data_packet_length; 899 } 900 901 #ifdef ENABLE_CLASSIC 902 int hci_extended_sco_link_supported(void){ 903 // No. 31, byte 3, bit 7 904 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 905 } 906 #endif 907 908 int hci_non_flushable_packet_boundary_flag_supported(void){ 909 // No. 54, byte 6, bit 6 910 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 911 } 912 913 static int gap_ssp_supported(void){ 914 // No. 51, byte 6, bit 3 915 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 916 } 917 918 static int hci_classic_supported(void){ 919 #ifdef ENABLE_CLASSIC 920 // No. 37, byte 4, bit 5, = No BR/EDR Support 921 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 922 #else 923 return 0; 924 #endif 925 } 926 927 static int hci_le_supported(void){ 928 #ifdef ENABLE_BLE 929 // No. 37, byte 4, bit 6 = LE Supported (Controller) 930 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 931 #else 932 return 0; 933 #endif 934 } 935 936 #ifdef ENABLE_BLE 937 938 /** 939 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 940 */ 941 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 942 *addr_type = hci_stack->le_own_addr_type; 943 if (hci_stack->le_own_addr_type){ 944 memcpy(addr, hci_stack->le_random_address, 6); 945 } else { 946 memcpy(addr, hci_stack->local_bd_addr, 6); 947 } 948 } 949 950 #ifdef ENABLE_LE_CENTRAL 951 void le_handle_advertisement_report(uint8_t *packet, int size){ 952 953 UNUSED(size); 954 955 int offset = 3; 956 int num_reports = packet[offset]; 957 offset += 1; 958 959 int i; 960 // log_info("HCI: handle adv report with num reports: %d", num_reports); 961 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 962 for (i=0; i<num_reports;i++){ 963 uint8_t data_length = packet[offset + 8]; 964 uint8_t event_size = 10 + data_length; 965 int pos = 0; 966 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 967 event[pos++] = event_size; 968 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 969 offset += 8; 970 pos += 8; 971 event[pos++] = packet[offset + 1 + data_length]; // rssi 972 event[pos++] = packet[offset++]; //data_length; 973 memcpy(&event[pos], &packet[offset], data_length); 974 pos += data_length; 975 offset += data_length + 1; // rssi 976 hci_emit_event(event, pos, 1); 977 } 978 } 979 #endif 980 #endif 981 982 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 983 984 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 985 if (!hci_stack->config) return 0; 986 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 987 // Limit baud rate for Broadcom chipsets to 3 mbps 988 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 989 baud_rate = 3000000; 990 } 991 return baud_rate; 992 } 993 994 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 995 UNUSED(ds); 996 997 switch (hci_stack->substate){ 998 case HCI_INIT_W4_SEND_RESET: 999 log_info("Resend HCI Reset"); 1000 hci_stack->substate = HCI_INIT_SEND_RESET; 1001 hci_stack->num_cmd_packets = 1; 1002 hci_run(); 1003 break; 1004 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1005 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1006 if (hci_stack->hci_transport->reset_link){ 1007 hci_stack->hci_transport->reset_link(); 1008 } 1009 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1010 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1011 log_info("Resend HCI Reset - CSR Warm Boot"); 1012 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1013 hci_stack->num_cmd_packets = 1; 1014 hci_run(); 1015 break; 1016 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1017 if (hci_stack->hci_transport->set_baudrate){ 1018 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1019 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1020 hci_stack->hci_transport->set_baudrate(baud_rate); 1021 } 1022 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1023 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1024 if (hci_stack->hci_transport->reset_link){ 1025 log_info("Link Reset"); 1026 hci_stack->hci_transport->reset_link(); 1027 } 1028 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1029 hci_run(); 1030 } 1031 break; 1032 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1033 // otherwise continue 1034 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1035 hci_send_cmd(&hci_read_local_supported_commands); 1036 break; 1037 default: 1038 break; 1039 } 1040 } 1041 #endif 1042 1043 static void hci_initializing_next_state(void){ 1044 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1045 } 1046 1047 // assumption: hci_can_send_command_packet_now() == true 1048 static void hci_initializing_run(void){ 1049 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1050 switch (hci_stack->substate){ 1051 case HCI_INIT_SEND_RESET: 1052 hci_state_reset(); 1053 1054 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1055 // prepare reset if command complete not received in 100ms 1056 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1057 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1058 btstack_run_loop_add_timer(&hci_stack->timeout); 1059 #endif 1060 // send command 1061 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1062 hci_send_cmd(&hci_reset); 1063 break; 1064 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1065 hci_send_cmd(&hci_read_local_version_information); 1066 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1067 break; 1068 case HCI_INIT_SEND_READ_LOCAL_NAME: 1069 hci_send_cmd(&hci_read_local_name); 1070 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1071 break; 1072 1073 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1074 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1075 hci_state_reset(); 1076 // prepare reset if command complete not received in 100ms 1077 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1078 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1079 btstack_run_loop_add_timer(&hci_stack->timeout); 1080 // send command 1081 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1082 hci_send_cmd(&hci_reset); 1083 break; 1084 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1085 hci_state_reset(); 1086 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1087 hci_send_cmd(&hci_reset); 1088 break; 1089 case HCI_INIT_SEND_BAUD_CHANGE: { 1090 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1091 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1092 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1093 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1094 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1095 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1096 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1097 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1098 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1099 btstack_run_loop_add_timer(&hci_stack->timeout); 1100 } 1101 break; 1102 } 1103 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1104 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1105 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1106 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1107 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1108 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1109 break; 1110 } 1111 case HCI_INIT_CUSTOM_INIT: 1112 // Custom initialization 1113 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1114 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1115 if (valid_cmd){ 1116 int size = 3 + hci_stack->hci_packet_buffer[2]; 1117 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1118 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1119 switch (valid_cmd) { 1120 case 1: 1121 default: 1122 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1123 break; 1124 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1125 log_info("CSR Warm Boot"); 1126 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1127 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1128 btstack_run_loop_add_timer(&hci_stack->timeout); 1129 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1130 && hci_stack->config 1131 && hci_stack->chipset 1132 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1133 && hci_stack->hci_transport->set_baudrate 1134 && hci_transport_uart_get_main_baud_rate()){ 1135 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1136 } else { 1137 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1138 } 1139 break; 1140 } 1141 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1142 break; 1143 } 1144 log_info("Init script done"); 1145 1146 // Init script download on Broadcom chipsets causes: 1147 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1148 // - baud rate to reset, restore UART baud rate if needed 1149 int need_baud_change = hci_stack->config 1150 && hci_stack->chipset 1151 && hci_stack->chipset->set_baudrate_command 1152 && hci_stack->hci_transport->set_baudrate 1153 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1154 if (need_baud_change) { 1155 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1156 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1157 hci_stack->hci_transport->set_baudrate(baud_rate); 1158 } 1159 1160 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1161 // -> Work around: wait a few milliseconds here. 1162 log_info("BCM delay after init script"); 1163 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1164 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1165 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1166 btstack_run_loop_add_timer(&hci_stack->timeout); 1167 break; 1168 } 1169 } 1170 // otherwise continue 1171 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1172 hci_send_cmd(&hci_read_local_supported_commands); 1173 break; 1174 case HCI_INIT_SET_BD_ADDR: 1175 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1176 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1177 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1178 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1179 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1180 break; 1181 #endif 1182 1183 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1184 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1185 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1186 hci_send_cmd(&hci_read_local_supported_commands); 1187 break; 1188 case HCI_INIT_READ_BD_ADDR: 1189 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1190 hci_send_cmd(&hci_read_bd_addr); 1191 break; 1192 case HCI_INIT_READ_BUFFER_SIZE: 1193 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1194 hci_send_cmd(&hci_read_buffer_size); 1195 break; 1196 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1197 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1198 hci_send_cmd(&hci_read_local_supported_features); 1199 break; 1200 1201 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1202 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1203 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1204 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1205 break; 1206 case HCI_INIT_HOST_BUFFER_SIZE: 1207 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1208 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1209 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1210 break; 1211 #endif 1212 1213 case HCI_INIT_SET_EVENT_MASK: 1214 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1215 if (hci_le_supported()){ 1216 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1217 } else { 1218 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1219 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1220 } 1221 break; 1222 1223 #ifdef ENABLE_CLASSIC 1224 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1225 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1226 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1227 break; 1228 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1229 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1230 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1231 break; 1232 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1233 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1234 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1235 break; 1236 case HCI_INIT_WRITE_LOCAL_NAME: 1237 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1238 if (hci_stack->local_name){ 1239 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1240 } else { 1241 char local_name[8+17+1]; 1242 // BTstack 11:22:33:44:55:66 1243 memcpy(local_name, "BTstack ", 8); 1244 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1245 local_name[8+17] = '\0'; 1246 log_info("---> Name %s", local_name); 1247 hci_send_cmd(&hci_write_local_name, local_name); 1248 } 1249 break; 1250 case HCI_INIT_WRITE_EIR_DATA: 1251 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1252 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1253 break; 1254 case HCI_INIT_WRITE_INQUIRY_MODE: 1255 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1256 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1257 break; 1258 case HCI_INIT_WRITE_SCAN_ENABLE: 1259 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1260 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1261 break; 1262 // only sent if ENABLE_SCO_OVER_HCI is defined 1263 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1264 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1265 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1266 break; 1267 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1268 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1269 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1270 break; 1271 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1272 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1273 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1274 log_info("BCM: Route SCO data via HCI transport"); 1275 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1276 break; 1277 1278 #endif 1279 #ifdef ENABLE_BLE 1280 // LE INIT 1281 case HCI_INIT_LE_READ_BUFFER_SIZE: 1282 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1283 hci_send_cmd(&hci_le_read_buffer_size); 1284 break; 1285 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1286 // LE Supported Host = 1, Simultaneous Host = 0 1287 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1288 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1289 break; 1290 #ifdef ENABLE_LE_CENTRAL 1291 case HCI_INIT_READ_WHITE_LIST_SIZE: 1292 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1293 hci_send_cmd(&hci_le_read_white_list_size); 1294 break; 1295 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1296 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1297 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1298 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1299 break; 1300 #endif 1301 #endif 1302 default: 1303 return; 1304 } 1305 } 1306 1307 static void hci_init_done(void){ 1308 // done. tell the app 1309 log_info("hci_init_done -> HCI_STATE_WORKING"); 1310 hci_stack->state = HCI_STATE_WORKING; 1311 hci_emit_state(); 1312 hci_run(); 1313 } 1314 1315 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1316 UNUSED(size); 1317 1318 uint8_t command_completed = 0; 1319 1320 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1321 uint16_t opcode = little_endian_read_16(packet,3); 1322 if (opcode == hci_stack->last_cmd_opcode){ 1323 command_completed = 1; 1324 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1325 } else { 1326 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1327 } 1328 } 1329 1330 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1331 uint8_t status = packet[2]; 1332 uint16_t opcode = little_endian_read_16(packet,4); 1333 if (opcode == hci_stack->last_cmd_opcode){ 1334 if (status){ 1335 command_completed = 1; 1336 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1337 } else { 1338 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1339 } 1340 } else { 1341 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1342 } 1343 } 1344 1345 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1346 1347 // Vendor == CSR 1348 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1349 // TODO: track actual command 1350 command_completed = 1; 1351 } 1352 1353 // Vendor == Toshiba 1354 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1355 // TODO: track actual command 1356 command_completed = 1; 1357 } 1358 1359 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1360 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1361 // 1362 // HCI Reset 1363 // Timeout 100 ms 1364 // HCI Reset 1365 // Command Complete Reset 1366 // HCI Read Local Version Information 1367 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1368 // hang... 1369 // 1370 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1371 if (!command_completed 1372 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1373 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1374 1375 uint16_t opcode = little_endian_read_16(packet,3); 1376 if (opcode == hci_reset.opcode){ 1377 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1378 return; 1379 } 1380 } 1381 1382 // CSR & H5 1383 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1384 if (!command_completed 1385 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1386 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1387 1388 uint16_t opcode = little_endian_read_16(packet,3); 1389 if (opcode == hci_reset.opcode){ 1390 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1391 return; 1392 } 1393 } 1394 1395 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1396 // fix: Correct substate and behave as command below 1397 if (command_completed){ 1398 switch (hci_stack->substate){ 1399 case HCI_INIT_SEND_RESET: 1400 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1401 break; 1402 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1403 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1404 break; 1405 default: 1406 break; 1407 } 1408 } 1409 1410 #endif 1411 1412 if (!command_completed) return; 1413 1414 int need_baud_change = 0; 1415 int need_addr_change = 0; 1416 1417 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1418 need_baud_change = hci_stack->config 1419 && hci_stack->chipset 1420 && hci_stack->chipset->set_baudrate_command 1421 && hci_stack->hci_transport->set_baudrate 1422 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1423 1424 need_addr_change = hci_stack->custom_bd_addr_set 1425 && hci_stack->chipset 1426 && hci_stack->chipset->set_bd_addr_command; 1427 #endif 1428 1429 switch(hci_stack->substate){ 1430 1431 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1432 case HCI_INIT_SEND_RESET: 1433 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1434 // fix: just correct substate and behave as command below 1435 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1436 btstack_run_loop_remove_timer(&hci_stack->timeout); 1437 break; 1438 case HCI_INIT_W4_SEND_RESET: 1439 btstack_run_loop_remove_timer(&hci_stack->timeout); 1440 break; 1441 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1442 log_info("Received local name, need baud change %d", need_baud_change); 1443 if (need_baud_change){ 1444 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1445 return; 1446 } 1447 // skip baud change 1448 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1449 return; 1450 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1451 // for STLC2500D, baud rate change already happened. 1452 // for others, baud rate gets changed now 1453 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1454 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1455 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1456 hci_stack->hci_transport->set_baudrate(baud_rate); 1457 } 1458 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1459 return; 1460 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1461 btstack_run_loop_remove_timer(&hci_stack->timeout); 1462 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1463 return; 1464 case HCI_INIT_W4_CUSTOM_INIT: 1465 // repeat custom init 1466 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1467 return; 1468 #else 1469 case HCI_INIT_W4_SEND_RESET: 1470 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1471 return ; 1472 #endif 1473 1474 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1475 if (need_baud_change && hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1476 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1477 return; 1478 } 1479 if (need_addr_change){ 1480 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1481 return; 1482 } 1483 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1484 return; 1485 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1486 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1487 if (need_baud_change){ 1488 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1489 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1490 hci_stack->hci_transport->set_baudrate(baud_rate); 1491 } 1492 if (need_addr_change){ 1493 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1494 return; 1495 } 1496 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1497 return; 1498 case HCI_INIT_W4_SET_BD_ADDR: 1499 // for STLC2500D, bd addr change only gets active after sending reset command 1500 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1501 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1502 return; 1503 } 1504 // skipping st warm boot 1505 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1506 return; 1507 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1508 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1509 return; 1510 #endif 1511 case HCI_INIT_W4_READ_BD_ADDR: 1512 // only read buffer size if supported 1513 if (hci_stack->local_supported_commands[0] & 0x01) { 1514 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1515 return; 1516 } 1517 // skipping read buffer size 1518 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1519 return; 1520 case HCI_INIT_W4_SET_EVENT_MASK: 1521 // skip Classic init commands for LE only chipsets 1522 if (!hci_classic_supported()){ 1523 #ifdef ENABLE_BLE 1524 if (hci_le_supported()){ 1525 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1526 return; 1527 } 1528 #endif 1529 log_error("Neither BR/EDR nor LE supported"); 1530 hci_init_done(); 1531 return; 1532 } 1533 if (!gap_ssp_supported()){ 1534 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1535 return; 1536 } 1537 break; 1538 #ifdef ENABLE_BLE 1539 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1540 // skip write le host if not supported (e.g. on LE only EM9301) 1541 if (hci_stack->local_supported_commands[0] & 0x02) break; 1542 #ifdef ENABLE_LE_CENTRAL 1543 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1544 #else 1545 hci_init_done(); 1546 #endif 1547 return; 1548 #endif 1549 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1550 // skip write eir data if no eir data set 1551 if (hci_stack->eir_data) break; 1552 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1553 return; 1554 1555 #ifdef ENABLE_SCO_OVER_HCI 1556 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1557 // skip write synchronous flow control if not supported 1558 if (hci_stack->local_supported_commands[0] & 0x04) break; 1559 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1560 // explicit fall through to reduce repetitions 1561 1562 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1563 // skip write default erroneous data reporting if not supported 1564 if (hci_stack->local_supported_commands[0] & 0x08) break; 1565 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1566 // explicit fall through to reduce repetitions 1567 1568 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1569 // skip bcm set sco pcm config on non-Broadcom chipsets 1570 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1571 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1572 // explicit fall through to reduce repetitions 1573 1574 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1575 if (!hci_le_supported()){ 1576 // SKIP LE init for Classic only configuration 1577 hci_init_done(); 1578 return; 1579 } 1580 break; 1581 1582 #else /* !ENABLE_SCO_OVER_HCI */ 1583 1584 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1585 #ifdef ENABLE_BLE 1586 if (hci_le_supported()){ 1587 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1588 return; 1589 } 1590 #endif 1591 // SKIP LE init for Classic only configuration 1592 hci_init_done(); 1593 return; 1594 #endif /* ENABLE_SCO_OVER_HCI */ 1595 1596 // Response to command before init done state -> init done 1597 case (HCI_INIT_DONE-1): 1598 hci_init_done(); 1599 return; 1600 1601 default: 1602 break; 1603 } 1604 hci_initializing_next_state(); 1605 } 1606 1607 static void event_handler(uint8_t *packet, int size){ 1608 1609 uint16_t event_length = packet[1]; 1610 1611 // assert packet is complete 1612 if (size != event_length + 2){ 1613 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1614 return; 1615 } 1616 1617 bd_addr_t addr; 1618 bd_addr_type_t addr_type; 1619 hci_con_handle_t handle; 1620 hci_connection_t * conn; 1621 int i; 1622 #ifdef ENABLE_CLASSIC 1623 uint8_t link_type; 1624 #endif 1625 1626 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1627 1628 switch (hci_event_packet_get_type(packet)) { 1629 1630 case HCI_EVENT_COMMAND_COMPLETE: 1631 // get num cmd packets - limit to 1 to reduce complexity 1632 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1633 1634 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1635 if (packet[5]) break; 1636 // terminate, name 248 chars 1637 packet[6+248] = 0; 1638 log_info("local name: %s", &packet[6]); 1639 } 1640 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1641 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1642 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1643 uint16_t acl_len = little_endian_read_16(packet, 6); 1644 uint16_t sco_len = packet[8]; 1645 1646 // determine usable ACL/SCO payload size 1647 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1648 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1649 1650 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1651 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1652 1653 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1654 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1655 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1656 } 1657 } 1658 #ifdef ENABLE_BLE 1659 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1660 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1661 hci_stack->le_acl_packets_total_num = packet[8]; 1662 // determine usable ACL payload size 1663 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1664 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1665 } 1666 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1667 } 1668 #ifdef ENABLE_LE_CENTRAL 1669 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1670 hci_stack->le_whitelist_capacity = packet[6]; 1671 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1672 } 1673 #endif 1674 #endif 1675 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1676 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1677 hci_stack->local_bd_addr); 1678 log_info("Local Address, Status: 0x%02x: Addr: %s", 1679 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1680 #ifdef ENABLE_CLASSIC 1681 if (hci_stack->link_key_db){ 1682 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1683 } 1684 #endif 1685 } 1686 #ifdef ENABLE_CLASSIC 1687 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1688 hci_emit_discoverable_enabled(hci_stack->discoverable); 1689 } 1690 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1691 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1692 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1693 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1694 hci_emit_event(event, sizeof(event), 1); 1695 } 1696 } 1697 #endif 1698 1699 // Note: HCI init checks 1700 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1701 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1702 1703 #ifdef ENABLE_CLASSIC 1704 // determine usable ACL packet types based on host buffer size and supported features 1705 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1706 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1707 #endif 1708 // Classic/LE 1709 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1710 } 1711 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1712 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1713 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1714 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1715 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1716 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1717 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1718 } 1719 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1720 hci_stack->local_supported_commands[0] = 1721 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1722 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1723 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1724 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1725 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1726 } 1727 #ifdef ENABLE_CLASSIC 1728 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1729 if (packet[5] == 0){ 1730 hci_stack->synchronous_flow_control_enabled = 1; 1731 } 1732 } 1733 #endif 1734 break; 1735 1736 case HCI_EVENT_COMMAND_STATUS: 1737 // get num cmd packets - limit to 1 to reduce complexity 1738 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1739 break; 1740 1741 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1742 int offset = 3; 1743 for (i=0; i<packet[2];i++){ 1744 handle = little_endian_read_16(packet, offset); 1745 offset += 2; 1746 uint16_t num_packets = little_endian_read_16(packet, offset); 1747 offset += 2; 1748 1749 conn = hci_connection_for_handle(handle); 1750 if (!conn){ 1751 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1752 continue; 1753 } 1754 1755 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1756 #ifdef ENABLE_CLASSIC 1757 if (conn->num_sco_packets_sent >= num_packets){ 1758 conn->num_sco_packets_sent -= num_packets; 1759 } else { 1760 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1761 conn->num_sco_packets_sent = 0; 1762 } 1763 hci_notify_if_sco_can_send_now(); 1764 #endif 1765 } else { 1766 if (conn->num_acl_packets_sent >= num_packets){ 1767 conn->num_acl_packets_sent -= num_packets; 1768 } else { 1769 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1770 conn->num_acl_packets_sent = 0; 1771 } 1772 } 1773 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1774 } 1775 break; 1776 } 1777 1778 #ifdef ENABLE_CLASSIC 1779 case HCI_EVENT_INQUIRY_COMPLETE: 1780 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 1781 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1782 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1783 hci_emit_event(event, sizeof(event), 1); 1784 } 1785 break; 1786 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1787 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 1788 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 1789 } 1790 break; 1791 case HCI_EVENT_CONNECTION_REQUEST: 1792 reverse_bd_addr(&packet[2], addr); 1793 // TODO: eval COD 8-10 1794 link_type = packet[11]; 1795 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1796 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1797 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1798 if (!conn) { 1799 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1800 } 1801 if (!conn) { 1802 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1803 hci_stack->decline_reason = 0x0d; 1804 bd_addr_copy(hci_stack->decline_addr, addr); 1805 break; 1806 } 1807 conn->role = HCI_ROLE_SLAVE; 1808 conn->state = RECEIVED_CONNECTION_REQUEST; 1809 // store info about eSCO 1810 if (link_type == 0x02){ 1811 conn->remote_supported_feature_eSCO = 1; 1812 } 1813 hci_run(); 1814 break; 1815 1816 case HCI_EVENT_CONNECTION_COMPLETE: 1817 // Connection management 1818 reverse_bd_addr(&packet[5], addr); 1819 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1820 addr_type = BD_ADDR_TYPE_CLASSIC; 1821 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1822 if (conn) { 1823 if (!packet[2]){ 1824 conn->state = OPEN; 1825 conn->con_handle = little_endian_read_16(packet, 3); 1826 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1827 1828 // restart timer 1829 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1830 btstack_run_loop_add_timer(&conn->timeout); 1831 1832 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1833 1834 hci_emit_nr_connections_changed(); 1835 } else { 1836 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1837 uint8_t status = packet[2]; 1838 bd_addr_t bd_address; 1839 memcpy(&bd_address, conn->address, 6); 1840 1841 // connection failed, remove entry 1842 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1843 btstack_memory_hci_connection_free( conn ); 1844 1845 // notify client if dedicated bonding 1846 if (notify_dedicated_bonding_failed){ 1847 log_info("hci notify_dedicated_bonding_failed"); 1848 hci_emit_dedicated_bonding_result(bd_address, status); 1849 } 1850 1851 // if authentication error, also delete link key 1852 if (packet[2] == 0x05) { 1853 gap_drop_link_key_for_bd_addr(addr); 1854 } 1855 } 1856 } 1857 break; 1858 1859 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1860 reverse_bd_addr(&packet[5], addr); 1861 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1862 if (packet[2]){ 1863 // connection failed 1864 break; 1865 } 1866 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1867 if (!conn) { 1868 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1869 } 1870 if (!conn) { 1871 break; 1872 } 1873 conn->state = OPEN; 1874 conn->con_handle = little_endian_read_16(packet, 3); 1875 1876 #ifdef ENABLE_SCO_OVER_HCI 1877 // update SCO 1878 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1879 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1880 } 1881 #endif 1882 break; 1883 1884 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1885 handle = little_endian_read_16(packet, 3); 1886 conn = hci_connection_for_handle(handle); 1887 if (!conn) break; 1888 if (!packet[2]){ 1889 uint8_t * features = &packet[5]; 1890 if (features[6] & (1 << 3)){ 1891 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1892 } 1893 if (features[3] & (1<<7)){ 1894 conn->remote_supported_feature_eSCO = 1; 1895 } 1896 } 1897 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1898 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1899 if (conn->bonding_flags & BONDING_DEDICATED){ 1900 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1901 } 1902 break; 1903 1904 case HCI_EVENT_LINK_KEY_REQUEST: 1905 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1906 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1907 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1908 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1909 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1910 hci_run(); 1911 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1912 return; 1913 1914 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1915 reverse_bd_addr(&packet[2], addr); 1916 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1917 if (!conn) break; 1918 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1919 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1920 // Change Connection Encryption keeps link key type 1921 if (link_key_type != CHANGED_COMBINATION_KEY){ 1922 conn->link_key_type = link_key_type; 1923 } 1924 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1925 // still forward event to allow dismiss of pairing dialog 1926 break; 1927 } 1928 1929 case HCI_EVENT_PIN_CODE_REQUEST: 1930 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1931 // non-bondable mode: pin code negative reply will be sent 1932 if (!hci_stack->bondable){ 1933 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1934 hci_run(); 1935 return; 1936 } 1937 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1938 if (!hci_stack->link_key_db) break; 1939 hci_event_pin_code_request_get_bd_addr(packet, addr); 1940 hci_stack->link_key_db->delete_link_key(addr); 1941 break; 1942 1943 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1944 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1945 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1946 break; 1947 1948 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1949 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1950 if (!hci_stack->ssp_auto_accept) break; 1951 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1952 break; 1953 1954 case HCI_EVENT_USER_PASSKEY_REQUEST: 1955 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1956 if (!hci_stack->ssp_auto_accept) break; 1957 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1958 break; 1959 #endif 1960 1961 case HCI_EVENT_ENCRYPTION_CHANGE: 1962 handle = little_endian_read_16(packet, 3); 1963 conn = hci_connection_for_handle(handle); 1964 if (!conn) break; 1965 if (packet[2] == 0) { 1966 if (packet[5]){ 1967 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1968 } else { 1969 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1970 } 1971 } 1972 #ifdef ENABLE_CLASSIC 1973 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1974 #endif 1975 break; 1976 1977 #ifdef ENABLE_CLASSIC 1978 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1979 handle = little_endian_read_16(packet, 3); 1980 conn = hci_connection_for_handle(handle); 1981 if (!conn) break; 1982 1983 // dedicated bonding: send result and disconnect 1984 if (conn->bonding_flags & BONDING_DEDICATED){ 1985 conn->bonding_flags &= ~BONDING_DEDICATED; 1986 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1987 conn->bonding_status = packet[2]; 1988 break; 1989 } 1990 1991 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1992 // link key sufficient for requested security 1993 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1994 break; 1995 } 1996 // not enough 1997 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1998 break; 1999 #endif 2000 2001 // HCI_EVENT_DISCONNECTION_COMPLETE 2002 // has been split, to first notify stack before shutting connection down 2003 // see end of function, too. 2004 case HCI_EVENT_DISCONNECTION_COMPLETE: 2005 if (packet[2]) break; // status != 0 2006 handle = little_endian_read_16(packet, 3); 2007 // drop outgoing ACL fragments if it is for closed connection 2008 if (hci_stack->acl_fragmentation_total_size > 0) { 2009 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2010 log_info("hci: drop fragmented ACL data for closed connection"); 2011 hci_stack->acl_fragmentation_total_size = 0; 2012 hci_stack->acl_fragmentation_pos = 0; 2013 } 2014 } 2015 2016 // re-enable advertisements for le connections if active 2017 conn = hci_connection_for_handle(handle); 2018 if (!conn) break; 2019 #ifdef ENABLE_BLE 2020 #ifdef ENABLE_LE_PERIPHERAL 2021 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 2022 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2023 } 2024 #endif 2025 #endif 2026 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2027 break; 2028 2029 case HCI_EVENT_HARDWARE_ERROR: 2030 log_error("Hardware Error: 0x%02x", packet[2]); 2031 if (hci_stack->hardware_error_callback){ 2032 (*hci_stack->hardware_error_callback)(packet[2]); 2033 } else { 2034 // if no special requests, just reboot stack 2035 hci_power_control_off(); 2036 hci_power_control_on(); 2037 } 2038 break; 2039 2040 #ifdef ENABLE_CLASSIC 2041 case HCI_EVENT_ROLE_CHANGE: 2042 if (packet[2]) break; // status != 0 2043 handle = little_endian_read_16(packet, 3); 2044 conn = hci_connection_for_handle(handle); 2045 if (!conn) break; // no conn 2046 conn->role = packet[9]; 2047 break; 2048 #endif 2049 2050 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2051 // release packet buffer only for asynchronous transport and if there are not further fragements 2052 if (hci_transport_synchronous()) { 2053 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2054 return; // instead of break: to avoid re-entering hci_run() 2055 } 2056 if (hci_stack->acl_fragmentation_total_size) break; 2057 hci_release_packet_buffer(); 2058 2059 // L2CAP receives this event via the hci_emit_event below 2060 2061 #ifdef ENABLE_CLASSIC 2062 // For SCO, we do the can_send_now_check here 2063 hci_notify_if_sco_can_send_now(); 2064 #endif 2065 break; 2066 2067 #ifdef ENABLE_CLASSIC 2068 case HCI_EVENT_SCO_CAN_SEND_NOW: 2069 // For SCO, we do the can_send_now_check here 2070 hci_notify_if_sco_can_send_now(); 2071 return; 2072 2073 // explode inquriy results for easier consumption 2074 case HCI_EVENT_INQUIRY_RESULT: 2075 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2076 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2077 gap_inquiry_explode(packet); 2078 break; 2079 #endif 2080 2081 #ifdef ENABLE_BLE 2082 case HCI_EVENT_LE_META: 2083 switch (packet[2]){ 2084 #ifdef ENABLE_LE_CENTRAL 2085 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2086 // log_info("advertising report received"); 2087 if (hci_stack->le_scanning_state != LE_SCANNING) break; 2088 le_handle_advertisement_report(packet, size); 2089 break; 2090 #endif 2091 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2092 // Connection management 2093 reverse_bd_addr(&packet[8], addr); 2094 addr_type = (bd_addr_type_t)packet[7]; 2095 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2096 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2097 #ifdef ENABLE_LE_CENTRAL 2098 // if auto-connect, remove from whitelist in both roles 2099 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2100 hci_remove_from_whitelist(addr_type, addr); 2101 } 2102 // handle error: error is reported only to the initiator -> outgoing connection 2103 if (packet[3]){ 2104 // outgoing connection establishment is done 2105 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2106 // remove entry 2107 if (conn){ 2108 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2109 btstack_memory_hci_connection_free( conn ); 2110 } 2111 break; 2112 } 2113 #endif 2114 // on success, both hosts receive connection complete event 2115 if (packet[6] == HCI_ROLE_MASTER){ 2116 #ifdef ENABLE_LE_CENTRAL 2117 // if we're master, it was an outgoing connection and we're done with it 2118 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2119 #endif 2120 } else { 2121 #ifdef ENABLE_LE_PERIPHERAL 2122 // if we're slave, it was an incoming connection, advertisements have stopped 2123 hci_stack->le_advertisements_active = 0; 2124 // try to re-enable them 2125 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2126 #endif 2127 } 2128 // LE connections are auto-accepted, so just create a connection if there isn't one already 2129 if (!conn){ 2130 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2131 } 2132 // no memory, sorry. 2133 if (!conn){ 2134 break; 2135 } 2136 2137 conn->state = OPEN; 2138 conn->role = packet[6]; 2139 conn->con_handle = little_endian_read_16(packet, 4); 2140 2141 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2142 2143 // restart timer 2144 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2145 // btstack_run_loop_add_timer(&conn->timeout); 2146 2147 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2148 2149 hci_emit_nr_connections_changed(); 2150 break; 2151 2152 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2153 2154 default: 2155 break; 2156 } 2157 break; 2158 #endif 2159 default: 2160 break; 2161 } 2162 2163 // handle BT initialization 2164 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2165 hci_initializing_event_handler(packet, size); 2166 } 2167 2168 // help with BT sleep 2169 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2170 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2171 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2172 hci_initializing_next_state(); 2173 } 2174 2175 // notify upper stack 2176 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2177 2178 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2179 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2180 if (!packet[2]){ 2181 handle = little_endian_read_16(packet, 3); 2182 hci_connection_t * aConn = hci_connection_for_handle(handle); 2183 if (aConn) { 2184 uint8_t status = aConn->bonding_status; 2185 uint16_t flags = aConn->bonding_flags; 2186 bd_addr_t bd_address; 2187 memcpy(&bd_address, aConn->address, 6); 2188 hci_shutdown_connection(aConn); 2189 // connection struct is gone, don't access anymore 2190 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2191 hci_emit_dedicated_bonding_result(bd_address, status); 2192 } 2193 } 2194 } 2195 } 2196 2197 // execute main loop 2198 hci_run(); 2199 } 2200 2201 #ifdef ENABLE_CLASSIC 2202 static void sco_handler(uint8_t * packet, uint16_t size){ 2203 if (!hci_stack->sco_packet_handler) return; 2204 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2205 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2206 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2207 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2208 if (conn){ 2209 conn->num_packets_completed++; 2210 hci_stack->host_completed_packets = 1; 2211 hci_run(); 2212 } 2213 #endif 2214 } 2215 #endif 2216 2217 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2218 hci_dump_packet(packet_type, 1, packet, size); 2219 switch (packet_type) { 2220 case HCI_EVENT_PACKET: 2221 event_handler(packet, size); 2222 break; 2223 case HCI_ACL_DATA_PACKET: 2224 acl_handler(packet, size); 2225 break; 2226 #ifdef ENABLE_CLASSIC 2227 case HCI_SCO_DATA_PACKET: 2228 sco_handler(packet, size); 2229 break; 2230 #endif 2231 default: 2232 break; 2233 } 2234 } 2235 2236 /** 2237 * @brief Add event packet handler. 2238 */ 2239 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2240 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2241 } 2242 2243 2244 /** Register HCI packet handlers */ 2245 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2246 hci_stack->acl_packet_handler = handler; 2247 } 2248 2249 #ifdef ENABLE_CLASSIC 2250 /** 2251 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2252 */ 2253 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2254 hci_stack->sco_packet_handler = handler; 2255 } 2256 #endif 2257 2258 static void hci_state_reset(void){ 2259 // no connections yet 2260 hci_stack->connections = NULL; 2261 2262 // keep discoverable/connectable as this has been requested by the client(s) 2263 // hci_stack->discoverable = 0; 2264 // hci_stack->connectable = 0; 2265 // hci_stack->bondable = 1; 2266 // hci_stack->own_addr_type = 0; 2267 2268 // buffer is free 2269 hci_stack->hci_packet_buffer_reserved = 0; 2270 2271 // no pending cmds 2272 hci_stack->decline_reason = 0; 2273 hci_stack->new_scan_enable_value = 0xff; 2274 2275 // LE 2276 #ifdef ENABLE_BLE 2277 memset(hci_stack->le_random_address, 0, 6); 2278 hci_stack->le_random_address_set = 0; 2279 #endif 2280 #ifdef ENABLE_LE_CENTRAL 2281 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2282 hci_stack->le_scan_type = 0xff; 2283 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2284 hci_stack->le_whitelist = 0; 2285 hci_stack->le_whitelist_capacity = 0; 2286 #endif 2287 2288 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2289 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2290 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2291 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2292 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2293 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2294 } 2295 2296 #ifdef ENABLE_CLASSIC 2297 /** 2298 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2299 */ 2300 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2301 // store and open remote device db 2302 hci_stack->link_key_db = link_key_db; 2303 if (hci_stack->link_key_db) { 2304 hci_stack->link_key_db->open(); 2305 } 2306 } 2307 #endif 2308 2309 void hci_init(const hci_transport_t *transport, const void *config){ 2310 2311 #ifdef HAVE_MALLOC 2312 if (!hci_stack) { 2313 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2314 } 2315 #else 2316 hci_stack = &hci_stack_static; 2317 #endif 2318 memset(hci_stack, 0, sizeof(hci_stack_t)); 2319 2320 // reference to use transport layer implementation 2321 hci_stack->hci_transport = transport; 2322 2323 // reference to used config 2324 hci_stack->config = config; 2325 2326 // setup pointer for outgoing packet buffer 2327 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2328 2329 // max acl payload size defined in config.h 2330 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2331 2332 // register packet handlers with transport 2333 transport->register_packet_handler(&packet_handler); 2334 2335 hci_stack->state = HCI_STATE_OFF; 2336 2337 // class of device 2338 hci_stack->class_of_device = 0x007a020c; // Smartphone 2339 2340 // bondable by default 2341 hci_stack->bondable = 1; 2342 2343 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2344 hci_stack->ssp_enable = 1; 2345 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2346 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2347 hci_stack->ssp_auto_accept = 1; 2348 2349 // voice setting - signed 16 bit pcm data with CVSD over the air 2350 hci_stack->sco_voice_setting = 0x60; 2351 2352 hci_state_reset(); 2353 } 2354 2355 /** 2356 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2357 */ 2358 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2359 hci_stack->chipset = chipset_driver; 2360 2361 // reset chipset driver - init is also called on power_up 2362 if (hci_stack->chipset && hci_stack->chipset->init){ 2363 hci_stack->chipset->init(hci_stack->config); 2364 } 2365 } 2366 2367 /** 2368 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2369 */ 2370 void hci_set_control(const btstack_control_t *hardware_control){ 2371 // references to used control implementation 2372 hci_stack->control = hardware_control; 2373 // init with transport config 2374 hardware_control->init(hci_stack->config); 2375 } 2376 2377 void hci_close(void){ 2378 // close remote device db 2379 if (hci_stack->link_key_db) { 2380 hci_stack->link_key_db->close(); 2381 } 2382 2383 btstack_linked_list_iterator_t lit; 2384 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2385 while (btstack_linked_list_iterator_has_next(&lit)){ 2386 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2387 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2388 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2389 hci_shutdown_connection(connection); 2390 } 2391 2392 hci_power_control(HCI_POWER_OFF); 2393 2394 #ifdef HAVE_MALLOC 2395 free(hci_stack); 2396 #endif 2397 hci_stack = NULL; 2398 } 2399 2400 #ifdef ENABLE_CLASSIC 2401 void gap_set_class_of_device(uint32_t class_of_device){ 2402 hci_stack->class_of_device = class_of_device; 2403 } 2404 2405 void hci_disable_l2cap_timeout_check(void){ 2406 disable_l2cap_timeouts = 1; 2407 } 2408 #endif 2409 2410 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2411 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2412 void hci_set_bd_addr(bd_addr_t addr){ 2413 memcpy(hci_stack->custom_bd_addr, addr, 6); 2414 hci_stack->custom_bd_addr_set = 1; 2415 } 2416 #endif 2417 2418 // State-Module-Driver overview 2419 // state module low-level 2420 // HCI_STATE_OFF off close 2421 // HCI_STATE_INITIALIZING, on open 2422 // HCI_STATE_WORKING, on open 2423 // HCI_STATE_HALTING, on open 2424 // HCI_STATE_SLEEPING, off/sleep close 2425 // HCI_STATE_FALLING_ASLEEP on open 2426 2427 static int hci_power_control_on(void){ 2428 2429 // power on 2430 int err = 0; 2431 if (hci_stack->control && hci_stack->control->on){ 2432 err = (*hci_stack->control->on)(); 2433 } 2434 if (err){ 2435 log_error( "POWER_ON failed"); 2436 hci_emit_hci_open_failed(); 2437 return err; 2438 } 2439 2440 // int chipset driver 2441 if (hci_stack->chipset && hci_stack->chipset->init){ 2442 hci_stack->chipset->init(hci_stack->config); 2443 } 2444 2445 // init transport 2446 if (hci_stack->hci_transport->init){ 2447 hci_stack->hci_transport->init(hci_stack->config); 2448 } 2449 2450 // open transport 2451 err = hci_stack->hci_transport->open(); 2452 if (err){ 2453 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2454 if (hci_stack->control && hci_stack->control->off){ 2455 (*hci_stack->control->off)(); 2456 } 2457 hci_emit_hci_open_failed(); 2458 return err; 2459 } 2460 return 0; 2461 } 2462 2463 static void hci_power_control_off(void){ 2464 2465 log_info("hci_power_control_off"); 2466 2467 // close low-level device 2468 hci_stack->hci_transport->close(); 2469 2470 log_info("hci_power_control_off - hci_transport closed"); 2471 2472 // power off 2473 if (hci_stack->control && hci_stack->control->off){ 2474 (*hci_stack->control->off)(); 2475 } 2476 2477 log_info("hci_power_control_off - control closed"); 2478 2479 hci_stack->state = HCI_STATE_OFF; 2480 } 2481 2482 static void hci_power_control_sleep(void){ 2483 2484 log_info("hci_power_control_sleep"); 2485 2486 #if 0 2487 // don't close serial port during sleep 2488 2489 // close low-level device 2490 hci_stack->hci_transport->close(hci_stack->config); 2491 #endif 2492 2493 // sleep mode 2494 if (hci_stack->control && hci_stack->control->sleep){ 2495 (*hci_stack->control->sleep)(); 2496 } 2497 2498 hci_stack->state = HCI_STATE_SLEEPING; 2499 } 2500 2501 static int hci_power_control_wake(void){ 2502 2503 log_info("hci_power_control_wake"); 2504 2505 // wake on 2506 if (hci_stack->control && hci_stack->control->wake){ 2507 (*hci_stack->control->wake)(); 2508 } 2509 2510 #if 0 2511 // open low-level device 2512 int err = hci_stack->hci_transport->open(hci_stack->config); 2513 if (err){ 2514 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2515 if (hci_stack->control && hci_stack->control->off){ 2516 (*hci_stack->control->off)(); 2517 } 2518 hci_emit_hci_open_failed(); 2519 return err; 2520 } 2521 #endif 2522 2523 return 0; 2524 } 2525 2526 static void hci_power_transition_to_initializing(void){ 2527 // set up state machine 2528 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2529 hci_stack->hci_packet_buffer_reserved = 0; 2530 hci_stack->state = HCI_STATE_INITIALIZING; 2531 hci_stack->substate = HCI_INIT_SEND_RESET; 2532 } 2533 2534 int hci_power_control(HCI_POWER_MODE power_mode){ 2535 2536 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2537 2538 int err = 0; 2539 switch (hci_stack->state){ 2540 2541 case HCI_STATE_OFF: 2542 switch (power_mode){ 2543 case HCI_POWER_ON: 2544 err = hci_power_control_on(); 2545 if (err) { 2546 log_error("hci_power_control_on() error %d", err); 2547 return err; 2548 } 2549 hci_power_transition_to_initializing(); 2550 break; 2551 case HCI_POWER_OFF: 2552 // do nothing 2553 break; 2554 case HCI_POWER_SLEEP: 2555 // do nothing (with SLEEP == OFF) 2556 break; 2557 } 2558 break; 2559 2560 case HCI_STATE_INITIALIZING: 2561 switch (power_mode){ 2562 case HCI_POWER_ON: 2563 // do nothing 2564 break; 2565 case HCI_POWER_OFF: 2566 // no connections yet, just turn it off 2567 hci_power_control_off(); 2568 break; 2569 case HCI_POWER_SLEEP: 2570 // no connections yet, just turn it off 2571 hci_power_control_sleep(); 2572 break; 2573 } 2574 break; 2575 2576 case HCI_STATE_WORKING: 2577 switch (power_mode){ 2578 case HCI_POWER_ON: 2579 // do nothing 2580 break; 2581 case HCI_POWER_OFF: 2582 // see hci_run 2583 hci_stack->state = HCI_STATE_HALTING; 2584 break; 2585 case HCI_POWER_SLEEP: 2586 // see hci_run 2587 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2588 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2589 break; 2590 } 2591 break; 2592 2593 case HCI_STATE_HALTING: 2594 switch (power_mode){ 2595 case HCI_POWER_ON: 2596 hci_power_transition_to_initializing(); 2597 break; 2598 case HCI_POWER_OFF: 2599 // do nothing 2600 break; 2601 case HCI_POWER_SLEEP: 2602 // see hci_run 2603 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2604 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2605 break; 2606 } 2607 break; 2608 2609 case HCI_STATE_FALLING_ASLEEP: 2610 switch (power_mode){ 2611 case HCI_POWER_ON: 2612 2613 #ifdef HAVE_PLATFORM_IPHONE_OS 2614 // nothing to do, if H4 supports power management 2615 if (btstack_control_iphone_power_management_enabled()){ 2616 hci_stack->state = HCI_STATE_INITIALIZING; 2617 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2618 break; 2619 } 2620 #endif 2621 hci_power_transition_to_initializing(); 2622 break; 2623 case HCI_POWER_OFF: 2624 // see hci_run 2625 hci_stack->state = HCI_STATE_HALTING; 2626 break; 2627 case HCI_POWER_SLEEP: 2628 // do nothing 2629 break; 2630 } 2631 break; 2632 2633 case HCI_STATE_SLEEPING: 2634 switch (power_mode){ 2635 case HCI_POWER_ON: 2636 2637 #ifdef HAVE_PLATFORM_IPHONE_OS 2638 // nothing to do, if H4 supports power management 2639 if (btstack_control_iphone_power_management_enabled()){ 2640 hci_stack->state = HCI_STATE_INITIALIZING; 2641 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2642 hci_update_scan_enable(); 2643 break; 2644 } 2645 #endif 2646 err = hci_power_control_wake(); 2647 if (err) return err; 2648 hci_power_transition_to_initializing(); 2649 break; 2650 case HCI_POWER_OFF: 2651 hci_stack->state = HCI_STATE_HALTING; 2652 break; 2653 case HCI_POWER_SLEEP: 2654 // do nothing 2655 break; 2656 } 2657 break; 2658 } 2659 2660 // create internal event 2661 hci_emit_state(); 2662 2663 // trigger next/first action 2664 hci_run(); 2665 2666 return 0; 2667 } 2668 2669 2670 #ifdef ENABLE_CLASSIC 2671 2672 static void hci_update_scan_enable(void){ 2673 // 2 = page scan, 1 = inq scan 2674 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2675 hci_run(); 2676 } 2677 2678 void gap_discoverable_control(uint8_t enable){ 2679 if (enable) enable = 1; // normalize argument 2680 2681 if (hci_stack->discoverable == enable){ 2682 hci_emit_discoverable_enabled(hci_stack->discoverable); 2683 return; 2684 } 2685 2686 hci_stack->discoverable = enable; 2687 hci_update_scan_enable(); 2688 } 2689 2690 void gap_connectable_control(uint8_t enable){ 2691 if (enable) enable = 1; // normalize argument 2692 2693 // don't emit event 2694 if (hci_stack->connectable == enable) return; 2695 2696 hci_stack->connectable = enable; 2697 hci_update_scan_enable(); 2698 } 2699 #endif 2700 2701 void gap_local_bd_addr(bd_addr_t address_buffer){ 2702 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2703 } 2704 2705 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2706 static void hci_host_num_completed_packets(void){ 2707 2708 // create packet manually as arrays are not supported and num_commands should not get reduced 2709 hci_reserve_packet_buffer(); 2710 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2711 2712 uint16_t size = 0; 2713 uint16_t num_handles = 0; 2714 packet[size++] = 0x35; 2715 packet[size++] = 0x0c; 2716 size++; // skip param len 2717 size++; // skip num handles 2718 2719 // add { handle, packets } entries 2720 btstack_linked_item_t * it; 2721 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2722 hci_connection_t * connection = (hci_connection_t *) it; 2723 if (connection->num_packets_completed){ 2724 little_endian_store_16(packet, size, connection->con_handle); 2725 size += 2; 2726 little_endian_store_16(packet, size, connection->num_packets_completed); 2727 size += 2; 2728 // 2729 num_handles++; 2730 connection->num_packets_completed = 0; 2731 } 2732 } 2733 2734 packet[2] = size - 3; 2735 packet[3] = num_handles; 2736 2737 hci_stack->host_completed_packets = 0; 2738 2739 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2740 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2741 2742 // release packet buffer for synchronous transport implementations 2743 if (hci_transport_synchronous()){ 2744 hci_stack->hci_packet_buffer_reserved = 0; 2745 } 2746 } 2747 #endif 2748 2749 static void hci_run(void){ 2750 2751 // log_info("hci_run: entered"); 2752 btstack_linked_item_t * it; 2753 2754 // send continuation fragments first, as they block the prepared packet buffer 2755 if (hci_stack->acl_fragmentation_total_size > 0) { 2756 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2757 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2758 if (connection) { 2759 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2760 hci_send_acl_packet_fragments(connection); 2761 return; 2762 } 2763 } else { 2764 // connection gone -> discard further fragments 2765 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2766 hci_stack->acl_fragmentation_total_size = 0; 2767 hci_stack->acl_fragmentation_pos = 0; 2768 } 2769 } 2770 2771 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2772 // send host num completed packets next as they don't require num_cmd_packets > 0 2773 if (!hci_can_send_comand_packet_transport()) return; 2774 if (hci_stack->host_completed_packets){ 2775 hci_host_num_completed_packets(); 2776 return; 2777 } 2778 #endif 2779 2780 if (!hci_can_send_command_packet_now()) return; 2781 2782 // global/non-connection oriented commands 2783 2784 #ifdef ENABLE_CLASSIC 2785 // decline incoming connections 2786 if (hci_stack->decline_reason){ 2787 uint8_t reason = hci_stack->decline_reason; 2788 hci_stack->decline_reason = 0; 2789 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2790 return; 2791 } 2792 // send scan enable 2793 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2794 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2795 hci_stack->new_scan_enable_value = 0xff; 2796 return; 2797 } 2798 // start/stop inquiry 2799 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 2800 uint8_t duration = hci_stack->inquiry_state; 2801 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2802 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 2803 return; 2804 } 2805 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 2806 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 2807 hci_send_cmd(&hci_inquiry_cancel); 2808 return; 2809 } 2810 // remote name request 2811 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 2812 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 2813 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 2814 hci_stack->remote_name_page_scan_repetition_mode, hci_stack->remote_name_clock_offset); 2815 } 2816 #endif 2817 2818 #ifdef ENABLE_BLE 2819 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2820 if ((hci_stack->state == HCI_STATE_WORKING) 2821 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2822 2823 #ifdef ENABLE_LE_CENTRAL 2824 // handle le scan 2825 switch(hci_stack->le_scanning_state){ 2826 case LE_START_SCAN: 2827 hci_stack->le_scanning_state = LE_SCANNING; 2828 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2829 return; 2830 2831 case LE_STOP_SCAN: 2832 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2833 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2834 return; 2835 default: 2836 break; 2837 } 2838 if (hci_stack->le_scan_type != 0xff){ 2839 // defaults: active scanning, accept all advertisement packets 2840 int scan_type = hci_stack->le_scan_type; 2841 hci_stack->le_scan_type = 0xff; 2842 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); 2843 return; 2844 } 2845 #endif 2846 #ifdef ENABLE_LE_PERIPHERAL 2847 // le advertisement control 2848 if (hci_stack->le_advertisements_todo){ 2849 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2850 } 2851 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2852 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2853 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2854 return; 2855 } 2856 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2857 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2858 hci_send_cmd(&hci_le_set_advertising_parameters, 2859 hci_stack->le_advertisements_interval_min, 2860 hci_stack->le_advertisements_interval_max, 2861 hci_stack->le_advertisements_type, 2862 hci_stack->le_own_addr_type, 2863 hci_stack->le_advertisements_direct_address_type, 2864 hci_stack->le_advertisements_direct_address, 2865 hci_stack->le_advertisements_channel_map, 2866 hci_stack->le_advertisements_filter_policy); 2867 return; 2868 } 2869 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2870 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2871 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, hci_stack->le_advertisements_data); 2872 return; 2873 } 2874 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2875 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2876 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2877 hci_stack->le_scan_response_data); 2878 return; 2879 } 2880 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2881 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2882 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2883 return; 2884 } 2885 #endif 2886 2887 #ifdef ENABLE_LE_CENTRAL 2888 // 2889 // LE Whitelist Management 2890 // 2891 2892 // check if whitelist needs modification 2893 btstack_linked_list_iterator_t lit; 2894 int modification_pending = 0; 2895 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2896 while (btstack_linked_list_iterator_has_next(&lit)){ 2897 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2898 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2899 modification_pending = 1; 2900 break; 2901 } 2902 } 2903 2904 if (modification_pending){ 2905 // stop connnecting if modification pending 2906 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2907 hci_send_cmd(&hci_le_create_connection_cancel); 2908 return; 2909 } 2910 2911 // add/remove entries 2912 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2913 while (btstack_linked_list_iterator_has_next(&lit)){ 2914 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2915 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2916 entry->state = LE_WHITELIST_ON_CONTROLLER; 2917 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2918 return; 2919 2920 } 2921 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2922 bd_addr_t address; 2923 bd_addr_type_t address_type = entry->address_type; 2924 memcpy(address, entry->address, 6); 2925 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2926 btstack_memory_whitelist_entry_free(entry); 2927 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2928 return; 2929 } 2930 } 2931 } 2932 2933 // start connecting 2934 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2935 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2936 bd_addr_t null_addr; 2937 memset(null_addr, 0, 6); 2938 hci_send_cmd(&hci_le_create_connection, 2939 0x0060, // scan interval: 60 ms 2940 0x0030, // scan interval: 30 ms 2941 1, // use whitelist 2942 0, // peer address type 2943 null_addr, // peer bd addr 2944 hci_stack->le_own_addr_type, // our addr type: 2945 0x0008, // conn interval min 2946 0x0018, // conn interval max 2947 0, // conn latency 2948 0x0048, // supervision timeout 2949 0x0001, // min ce length 2950 0x0001 // max ce length 2951 ); 2952 return; 2953 } 2954 #endif 2955 } 2956 #endif 2957 2958 // send pending HCI commands 2959 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2960 hci_connection_t * connection = (hci_connection_t *) it; 2961 2962 switch(connection->state){ 2963 case SEND_CREATE_CONNECTION: 2964 switch(connection->address_type){ 2965 #ifdef ENABLE_CLASSIC 2966 case BD_ADDR_TYPE_CLASSIC: 2967 log_info("sending hci_create_connection"); 2968 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2969 break; 2970 #endif 2971 default: 2972 #ifdef ENABLE_BLE 2973 #ifdef ENABLE_LE_CENTRAL 2974 log_info("sending hci_le_create_connection"); 2975 hci_send_cmd(&hci_le_create_connection, 2976 0x0060, // scan interval: 60 ms 2977 0x0030, // scan interval: 30 ms 2978 0, // don't use whitelist 2979 connection->address_type, // peer address type 2980 connection->address, // peer bd addr 2981 hci_stack->le_own_addr_type, // our addr type: 2982 0x0008, // conn interval min 2983 0x0018, // conn interval max 2984 0, // conn latency 2985 0x0048, // supervision timeout 2986 0x0001, // min ce length 2987 0x0001 // max ce length 2988 ); 2989 2990 connection->state = SENT_CREATE_CONNECTION; 2991 #endif 2992 #endif 2993 break; 2994 } 2995 return; 2996 2997 #ifdef ENABLE_CLASSIC 2998 case RECEIVED_CONNECTION_REQUEST: 2999 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3000 connection->state = ACCEPTED_CONNECTION_REQUEST; 3001 connection->role = HCI_ROLE_SLAVE; 3002 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3003 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 3004 } 3005 return; 3006 #endif 3007 3008 #ifdef ENABLE_BLE 3009 #ifdef ENABLE_LE_CENTRAL 3010 case SEND_CANCEL_CONNECTION: 3011 connection->state = SENT_CANCEL_CONNECTION; 3012 hci_send_cmd(&hci_le_create_connection_cancel); 3013 return; 3014 #endif 3015 #endif 3016 case SEND_DISCONNECT: 3017 connection->state = SENT_DISCONNECT; 3018 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3019 return; 3020 3021 default: 3022 break; 3023 } 3024 3025 #ifdef ENABLE_CLASSIC 3026 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3027 log_info("responding to link key request"); 3028 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3029 link_key_t link_key; 3030 link_key_type_t link_key_type; 3031 if ( hci_stack->link_key_db 3032 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3033 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3034 connection->link_key_type = link_key_type; 3035 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3036 } else { 3037 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3038 } 3039 return; 3040 } 3041 3042 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3043 log_info("denying to pin request"); 3044 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3045 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3046 return; 3047 } 3048 3049 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3050 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3051 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3052 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3053 // tweak authentication requirements 3054 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3055 if (connection->bonding_flags & BONDING_DEDICATED){ 3056 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3057 } 3058 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3059 authreq |= 1; 3060 } 3061 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3062 } else { 3063 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3064 } 3065 return; 3066 } 3067 3068 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3069 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3070 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3071 return; 3072 } 3073 3074 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3075 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3076 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3077 return; 3078 } 3079 3080 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3081 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3082 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3083 return; 3084 } 3085 3086 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3087 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3088 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3089 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3090 return; 3091 } 3092 3093 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3094 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3095 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3096 return; 3097 } 3098 3099 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3100 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3101 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3102 return; 3103 } 3104 #endif 3105 3106 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3107 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3108 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3109 return; 3110 } 3111 3112 #ifdef ENABLE_BLE 3113 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 3114 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3115 3116 uint16_t connection_interval_min = connection->le_conn_interval_min; 3117 connection->le_conn_interval_min = 0; 3118 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 3119 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3120 0x0000, 0xffff); 3121 } 3122 #endif 3123 } 3124 3125 hci_connection_t * connection; 3126 switch (hci_stack->state){ 3127 case HCI_STATE_INITIALIZING: 3128 hci_initializing_run(); 3129 break; 3130 3131 case HCI_STATE_HALTING: 3132 3133 log_info("HCI_STATE_HALTING"); 3134 3135 // free whitelist entries 3136 #ifdef ENABLE_BLE 3137 #ifdef ENABLE_LE_CENTRAL 3138 { 3139 btstack_linked_list_iterator_t lit; 3140 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3141 while (btstack_linked_list_iterator_has_next(&lit)){ 3142 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3143 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3144 btstack_memory_whitelist_entry_free(entry); 3145 } 3146 } 3147 #endif 3148 #endif 3149 // close all open connections 3150 connection = (hci_connection_t *) hci_stack->connections; 3151 if (connection){ 3152 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3153 if (!hci_can_send_command_packet_now()) return; 3154 3155 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3156 3157 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3158 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3159 3160 // ... which would be ignored anyway as we shutdown (free) the connection now 3161 hci_shutdown_connection(connection); 3162 3163 // finally, send the disconnect command 3164 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3165 return; 3166 } 3167 log_info("HCI_STATE_HALTING, calling off"); 3168 3169 // switch mode 3170 hci_power_control_off(); 3171 3172 log_info("HCI_STATE_HALTING, emitting state"); 3173 hci_emit_state(); 3174 log_info("HCI_STATE_HALTING, done"); 3175 break; 3176 3177 case HCI_STATE_FALLING_ASLEEP: 3178 switch(hci_stack->substate) { 3179 case HCI_FALLING_ASLEEP_DISCONNECT: 3180 log_info("HCI_STATE_FALLING_ASLEEP"); 3181 // close all open connections 3182 connection = (hci_connection_t *) hci_stack->connections; 3183 3184 #ifdef HAVE_PLATFORM_IPHONE_OS 3185 // don't close connections, if H4 supports power management 3186 if (btstack_control_iphone_power_management_enabled()){ 3187 connection = NULL; 3188 } 3189 #endif 3190 if (connection){ 3191 3192 // send disconnect 3193 if (!hci_can_send_command_packet_now()) return; 3194 3195 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3196 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3197 3198 // send disconnected event right away - causes higher layer connections to get closed, too. 3199 hci_shutdown_connection(connection); 3200 return; 3201 } 3202 3203 if (hci_classic_supported()){ 3204 // disable page and inquiry scan 3205 if (!hci_can_send_command_packet_now()) return; 3206 3207 log_info("HCI_STATE_HALTING, disabling inq scans"); 3208 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3209 3210 // continue in next sub state 3211 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3212 break; 3213 } 3214 // no break - fall through for ble-only chips 3215 3216 case HCI_FALLING_ASLEEP_COMPLETE: 3217 log_info("HCI_STATE_HALTING, calling sleep"); 3218 #ifdef HAVE_PLATFORM_IPHONE_OS 3219 // don't actually go to sleep, if H4 supports power management 3220 if (btstack_control_iphone_power_management_enabled()){ 3221 // SLEEP MODE reached 3222 hci_stack->state = HCI_STATE_SLEEPING; 3223 hci_emit_state(); 3224 break; 3225 } 3226 #endif 3227 // switch mode 3228 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3229 hci_emit_state(); 3230 break; 3231 3232 default: 3233 break; 3234 } 3235 break; 3236 3237 default: 3238 break; 3239 } 3240 } 3241 3242 int hci_send_cmd_packet(uint8_t *packet, int size){ 3243 // house-keeping 3244 3245 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3246 hci_stack->loopback_mode = packet[3]; 3247 } 3248 3249 #ifdef ENABLE_CLASSIC 3250 bd_addr_t addr; 3251 hci_connection_t * conn; 3252 3253 // create_connection? 3254 if (IS_COMMAND(packet, hci_create_connection)){ 3255 reverse_bd_addr(&packet[3], addr); 3256 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3257 3258 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3259 if (!conn){ 3260 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3261 if (!conn){ 3262 // notify client that alloc failed 3263 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3264 return 0; // don't sent packet to controller 3265 } 3266 conn->state = SEND_CREATE_CONNECTION; 3267 } 3268 log_info("conn state %u", conn->state); 3269 switch (conn->state){ 3270 // if connection active exists 3271 case OPEN: 3272 // and OPEN, emit connection complete command, don't send to controller 3273 hci_emit_connection_complete(addr, conn->con_handle, 0); 3274 return 0; 3275 case SEND_CREATE_CONNECTION: 3276 // connection created by hci, e.g. dedicated bonding 3277 break; 3278 default: 3279 // otherwise, just ignore as it is already in the open process 3280 return 0; 3281 } 3282 conn->state = SENT_CREATE_CONNECTION; 3283 } 3284 3285 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3286 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3287 } 3288 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3289 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3290 } 3291 3292 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3293 if (hci_stack->link_key_db){ 3294 reverse_bd_addr(&packet[3], addr); 3295 hci_stack->link_key_db->delete_link_key(addr); 3296 } 3297 } 3298 3299 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3300 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3301 reverse_bd_addr(&packet[3], addr); 3302 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3303 if (conn){ 3304 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3305 } 3306 } 3307 3308 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3309 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3310 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3311 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3312 reverse_bd_addr(&packet[3], addr); 3313 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3314 if (conn){ 3315 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3316 } 3317 } 3318 3319 #ifdef ENABLE_SCO_OVER_HCI 3320 // setup_synchronous_connection? Voice setting at offset 22 3321 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3322 // TODO: compare to current setting if sco connection already active 3323 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3324 } 3325 // accept_synchronus_connection? Voice setting at offset 18 3326 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3327 // TODO: compare to current setting if sco connection already active 3328 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3329 } 3330 #endif 3331 #endif 3332 3333 #ifdef ENABLE_BLE 3334 #ifdef ENABLE_LE_PERIPHERAL 3335 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3336 hci_stack->le_random_address_set = 1; 3337 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3338 } 3339 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3340 hci_stack->le_advertisements_active = packet[3]; 3341 } 3342 #endif 3343 #ifdef ENABLE_LE_CENTRAL 3344 if (IS_COMMAND(packet, hci_le_create_connection)){ 3345 // white list used? 3346 uint8_t initiator_filter_policy = packet[7]; 3347 switch (initiator_filter_policy){ 3348 case 0: 3349 // whitelist not used 3350 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3351 break; 3352 case 1: 3353 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3354 break; 3355 default: 3356 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3357 break; 3358 } 3359 } 3360 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3361 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3362 } 3363 #endif 3364 #endif 3365 3366 hci_stack->num_cmd_packets--; 3367 3368 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3369 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3370 3371 // release packet buffer for synchronous transport implementations 3372 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3373 hci_stack->hci_packet_buffer_reserved = 0; 3374 } 3375 3376 return err; 3377 } 3378 3379 // disconnect because of security block 3380 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3381 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3382 if (!connection) return; 3383 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3384 } 3385 3386 3387 // Configure Secure Simple Pairing 3388 3389 #ifdef ENABLE_CLASSIC 3390 3391 // enable will enable SSP during init 3392 void gap_ssp_set_enable(int enable){ 3393 hci_stack->ssp_enable = enable; 3394 } 3395 3396 static int hci_local_ssp_activated(void){ 3397 return gap_ssp_supported() && hci_stack->ssp_enable; 3398 } 3399 3400 // if set, BTstack will respond to io capability request using authentication requirement 3401 void gap_ssp_set_io_capability(int io_capability){ 3402 hci_stack->ssp_io_capability = io_capability; 3403 } 3404 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3405 hci_stack->ssp_authentication_requirement = authentication_requirement; 3406 } 3407 3408 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3409 void gap_ssp_set_auto_accept(int auto_accept){ 3410 hci_stack->ssp_auto_accept = auto_accept; 3411 } 3412 #endif 3413 3414 // va_list part of hci_send_cmd 3415 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3416 if (!hci_can_send_command_packet_now()){ 3417 log_error("hci_send_cmd called but cannot send packet now"); 3418 return 0; 3419 } 3420 3421 // for HCI INITIALIZATION 3422 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3423 hci_stack->last_cmd_opcode = cmd->opcode; 3424 3425 hci_reserve_packet_buffer(); 3426 uint8_t * packet = hci_stack->hci_packet_buffer; 3427 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3428 return hci_send_cmd_packet(packet, size); 3429 } 3430 3431 /** 3432 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3433 */ 3434 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3435 va_list argptr; 3436 va_start(argptr, cmd); 3437 int res = hci_send_cmd_va_arg(cmd, argptr); 3438 va_end(argptr); 3439 return res; 3440 } 3441 3442 // Create various non-HCI events. 3443 // TODO: generalize, use table similar to hci_create_command 3444 3445 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3446 // dump packet 3447 if (dump) { 3448 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3449 } 3450 3451 // dispatch to all event handlers 3452 btstack_linked_list_iterator_t it; 3453 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3454 while (btstack_linked_list_iterator_has_next(&it)){ 3455 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3456 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3457 } 3458 } 3459 3460 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3461 if (!hci_stack->acl_packet_handler) return; 3462 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3463 } 3464 3465 #ifdef ENABLE_CLASSIC 3466 static void hci_notify_if_sco_can_send_now(void){ 3467 // notify SCO sender if waiting 3468 if (!hci_stack->sco_waiting_for_can_send_now) return; 3469 if (hci_can_send_sco_packet_now()){ 3470 hci_stack->sco_waiting_for_can_send_now = 0; 3471 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3472 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3473 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3474 } 3475 } 3476 3477 // parsing end emitting has been merged to reduce code size 3478 static void gap_inquiry_explode(uint8_t * packet){ 3479 uint8_t event[15+GAP_INQUIRY_MAX_NAME_LEN]; 3480 3481 uint8_t * eir_data; 3482 ad_context_t context; 3483 const uint8_t * name; 3484 uint8_t name_len; 3485 3486 int event_type = hci_event_packet_get_type(packet); 3487 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3488 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3489 3490 // event[1] is set at the end 3491 int i; 3492 for (i=0; i<num_responses;i++){ 3493 memset(event, 0, sizeof(event)); 3494 event[0] = GAP_EVENT_INQUIRY_RESULT; 3495 uint8_t event_size = 18; // if name is not set by EIR 3496 3497 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3498 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3499 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3500 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3501 3502 switch (event_type){ 3503 case HCI_EVENT_INQUIRY_RESULT: 3504 // 14,15,16,17 = 0, size 18 3505 break; 3506 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3507 event[14] = 1; 3508 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3509 // 16,17 = 0, size 18 3510 break; 3511 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3512 event[14] = 1; 3513 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3514 // for EIR packets, there is only one reponse in it 3515 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3516 name = NULL; 3517 // EIR data is 240 bytes in EIR event 3518 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3519 uint8_t data_type = ad_iterator_get_data_type(&context); 3520 uint8_t data_size = ad_iterator_get_data_len(&context); 3521 const uint8_t * data = ad_iterator_get_data(&context); 3522 // Prefer Complete Local Name over Shortend Local Name 3523 switch (data_type){ 3524 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3525 if (name) continue; 3526 /* explicit fall-through */ 3527 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3528 name = data; 3529 name_len = data_size; 3530 break; 3531 default: 3532 break; 3533 } 3534 } 3535 if (name){ 3536 event[16] = 1; 3537 // truncate name if needed 3538 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3539 event[17] = len; 3540 memcpy(&event[18], name, len); 3541 event_size += len; 3542 } 3543 break; 3544 } 3545 event[1] = event_size - 2; 3546 hci_emit_event(event, event_size, 1); 3547 } 3548 } 3549 #endif 3550 3551 void hci_emit_state(void){ 3552 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3553 uint8_t event[3]; 3554 event[0] = BTSTACK_EVENT_STATE; 3555 event[1] = sizeof(event) - 2; 3556 event[2] = hci_stack->state; 3557 hci_emit_event(event, sizeof(event), 1); 3558 } 3559 3560 #ifdef ENABLE_CLASSIC 3561 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3562 uint8_t event[13]; 3563 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3564 event[1] = sizeof(event) - 2; 3565 event[2] = status; 3566 little_endian_store_16(event, 3, con_handle); 3567 reverse_bd_addr(address, &event[5]); 3568 event[11] = 1; // ACL connection 3569 event[12] = 0; // encryption disabled 3570 hci_emit_event(event, sizeof(event), 1); 3571 } 3572 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3573 if (disable_l2cap_timeouts) return; 3574 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3575 uint8_t event[4]; 3576 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3577 event[1] = sizeof(event) - 2; 3578 little_endian_store_16(event, 2, conn->con_handle); 3579 hci_emit_event(event, sizeof(event), 1); 3580 } 3581 #endif 3582 3583 #ifdef ENABLE_BLE 3584 #ifdef ENABLE_LE_CENTRAL 3585 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3586 uint8_t event[21]; 3587 event[0] = HCI_EVENT_LE_META; 3588 event[1] = sizeof(event) - 2; 3589 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3590 event[3] = status; 3591 little_endian_store_16(event, 4, con_handle); 3592 event[6] = 0; // TODO: role 3593 event[7] = address_type; 3594 reverse_bd_addr(address, &event[8]); 3595 little_endian_store_16(event, 14, 0); // interval 3596 little_endian_store_16(event, 16, 0); // latency 3597 little_endian_store_16(event, 18, 0); // supervision timeout 3598 event[20] = 0; // master clock accuracy 3599 hci_emit_event(event, sizeof(event), 1); 3600 } 3601 #endif 3602 #endif 3603 3604 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3605 uint8_t event[6]; 3606 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3607 event[1] = sizeof(event) - 2; 3608 event[2] = 0; // status = OK 3609 little_endian_store_16(event, 3, con_handle); 3610 event[5] = reason; 3611 hci_emit_event(event, sizeof(event), 1); 3612 } 3613 3614 static void hci_emit_nr_connections_changed(void){ 3615 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3616 uint8_t event[3]; 3617 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3618 event[1] = sizeof(event) - 2; 3619 event[2] = nr_hci_connections(); 3620 hci_emit_event(event, sizeof(event), 1); 3621 } 3622 3623 static void hci_emit_hci_open_failed(void){ 3624 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3625 uint8_t event[2]; 3626 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3627 event[1] = sizeof(event) - 2; 3628 hci_emit_event(event, sizeof(event), 1); 3629 } 3630 3631 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3632 log_info("hci_emit_dedicated_bonding_result %u ", status); 3633 uint8_t event[9]; 3634 int pos = 0; 3635 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3636 event[pos++] = sizeof(event) - 2; 3637 event[pos++] = status; 3638 reverse_bd_addr(address, &event[pos]); 3639 hci_emit_event(event, sizeof(event), 1); 3640 } 3641 3642 3643 #ifdef ENABLE_CLASSIC 3644 3645 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3646 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3647 uint8_t event[5]; 3648 int pos = 0; 3649 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3650 event[pos++] = sizeof(event) - 2; 3651 little_endian_store_16(event, 2, con_handle); 3652 pos += 2; 3653 event[pos++] = level; 3654 hci_emit_event(event, sizeof(event), 1); 3655 } 3656 3657 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3658 if (!connection) return LEVEL_0; 3659 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3660 return gap_security_level_for_link_key_type(connection->link_key_type); 3661 } 3662 3663 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3664 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3665 uint8_t event[3]; 3666 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3667 event[1] = sizeof(event) - 2; 3668 event[2] = enabled; 3669 hci_emit_event(event, sizeof(event), 1); 3670 } 3671 3672 #ifdef ENABLE_CLASSIC 3673 // query if remote side supports eSCO 3674 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3675 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3676 if (!connection) return 0; 3677 return connection->remote_supported_feature_eSCO; 3678 } 3679 3680 // query if remote side supports SSP 3681 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3682 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3683 if (!connection) return 0; 3684 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3685 } 3686 3687 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3688 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3689 } 3690 #endif 3691 3692 // GAP API 3693 /** 3694 * @bbrief enable/disable bonding. default is enabled 3695 * @praram enabled 3696 */ 3697 void gap_set_bondable_mode(int enable){ 3698 hci_stack->bondable = enable ? 1 : 0; 3699 } 3700 /** 3701 * @brief Get bondable mode. 3702 * @return 1 if bondable 3703 */ 3704 int gap_get_bondable_mode(void){ 3705 return hci_stack->bondable; 3706 } 3707 3708 /** 3709 * @brief map link keys to security levels 3710 */ 3711 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3712 switch (link_key_type){ 3713 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3714 return LEVEL_4; 3715 case COMBINATION_KEY: 3716 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3717 return LEVEL_3; 3718 default: 3719 return LEVEL_2; 3720 } 3721 } 3722 3723 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3724 log_info("gap_mitm_protection_required_for_security_level %u", level); 3725 return level > LEVEL_2; 3726 } 3727 3728 /** 3729 * @brief get current security level 3730 */ 3731 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3732 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3733 if (!connection) return LEVEL_0; 3734 return gap_security_level_for_connection(connection); 3735 } 3736 3737 /** 3738 * @brief request connection to device to 3739 * @result GAP_AUTHENTICATION_RESULT 3740 */ 3741 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3742 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3743 if (!connection){ 3744 hci_emit_security_level(con_handle, LEVEL_0); 3745 return; 3746 } 3747 gap_security_level_t current_level = gap_security_level(con_handle); 3748 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3749 if (current_level >= requested_level){ 3750 hci_emit_security_level(con_handle, current_level); 3751 return; 3752 } 3753 3754 connection->requested_security_level = requested_level; 3755 3756 #if 0 3757 // sending encryption request without a link key results in an error. 3758 // TODO: figure out how to use it properly 3759 3760 // would enabling ecnryption suffice (>= LEVEL_2)? 3761 if (hci_stack->link_key_db){ 3762 link_key_type_t link_key_type; 3763 link_key_t link_key; 3764 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3765 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3766 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3767 return; 3768 } 3769 } 3770 } 3771 #endif 3772 3773 // try to authenticate connection 3774 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3775 hci_run(); 3776 } 3777 3778 /** 3779 * @brief start dedicated bonding with device. disconnect after bonding 3780 * @param device 3781 * @param request MITM protection 3782 * @result GAP_DEDICATED_BONDING_COMPLETE 3783 */ 3784 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3785 3786 // create connection state machine 3787 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3788 3789 if (!connection){ 3790 return BTSTACK_MEMORY_ALLOC_FAILED; 3791 } 3792 3793 // delete linkn key 3794 gap_drop_link_key_for_bd_addr(device); 3795 3796 // configure LEVEL_2/3, dedicated bonding 3797 connection->state = SEND_CREATE_CONNECTION; 3798 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3799 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3800 connection->bonding_flags = BONDING_DEDICATED; 3801 3802 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3803 3804 // handle: connnection failure (connection complete != ok) 3805 // handle: authentication failure 3806 // handle: disconnect on done 3807 3808 hci_run(); 3809 3810 return 0; 3811 } 3812 #endif 3813 3814 void gap_set_local_name(const char * local_name){ 3815 hci_stack->local_name = local_name; 3816 } 3817 3818 3819 #ifdef ENABLE_BLE 3820 3821 #ifdef ENABLE_LE_CENTRAL 3822 void gap_start_scan(void){ 3823 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3824 hci_stack->le_scanning_state = LE_START_SCAN; 3825 hci_run(); 3826 } 3827 3828 void gap_stop_scan(void){ 3829 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3830 hci_stack->le_scanning_state = LE_STOP_SCAN; 3831 hci_run(); 3832 } 3833 3834 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3835 hci_stack->le_scan_type = scan_type; 3836 hci_stack->le_scan_interval = scan_interval; 3837 hci_stack->le_scan_window = scan_window; 3838 hci_run(); 3839 } 3840 3841 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3842 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3843 if (!conn){ 3844 log_info("gap_connect: no connection exists yet, creating context"); 3845 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3846 if (!conn){ 3847 // notify client that alloc failed 3848 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3849 log_info("gap_connect: failed to alloc hci_connection_t"); 3850 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3851 } 3852 conn->state = SEND_CREATE_CONNECTION; 3853 log_info("gap_connect: send create connection next"); 3854 hci_run(); 3855 return 0; 3856 } 3857 3858 if (!hci_is_le_connection(conn) || 3859 conn->state == SEND_CREATE_CONNECTION || 3860 conn->state == SENT_CREATE_CONNECTION) { 3861 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3862 log_error("gap_connect: classic connection or connect is already being created"); 3863 return GATT_CLIENT_IN_WRONG_STATE; 3864 } 3865 3866 log_info("gap_connect: context exists with state %u", conn->state); 3867 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3868 hci_run(); 3869 return 0; 3870 } 3871 3872 // @assumption: only a single outgoing LE Connection exists 3873 static hci_connection_t * gap_get_outgoing_connection(void){ 3874 btstack_linked_item_t *it; 3875 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3876 hci_connection_t * conn = (hci_connection_t *) it; 3877 if (!hci_is_le_connection(conn)) continue; 3878 switch (conn->state){ 3879 case SEND_CREATE_CONNECTION: 3880 case SENT_CREATE_CONNECTION: 3881 return conn; 3882 default: 3883 break; 3884 }; 3885 } 3886 return NULL; 3887 } 3888 3889 uint8_t gap_connect_cancel(void){ 3890 hci_connection_t * conn = gap_get_outgoing_connection(); 3891 if (!conn) return 0; 3892 switch (conn->state){ 3893 case SEND_CREATE_CONNECTION: 3894 // skip sending create connection and emit event instead 3895 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3896 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3897 btstack_memory_hci_connection_free( conn ); 3898 break; 3899 case SENT_CREATE_CONNECTION: 3900 // request to send cancel connection 3901 conn->state = SEND_CANCEL_CONNECTION; 3902 hci_run(); 3903 break; 3904 default: 3905 break; 3906 } 3907 return 0; 3908 } 3909 #endif 3910 3911 /** 3912 * @brief Updates the connection parameters for a given LE connection 3913 * @param handle 3914 * @param conn_interval_min (unit: 1.25ms) 3915 * @param conn_interval_max (unit: 1.25ms) 3916 * @param conn_latency 3917 * @param supervision_timeout (unit: 10ms) 3918 * @returns 0 if ok 3919 */ 3920 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3921 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3922 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3923 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3924 connection->le_conn_interval_min = conn_interval_min; 3925 connection->le_conn_interval_max = conn_interval_max; 3926 connection->le_conn_latency = conn_latency; 3927 connection->le_supervision_timeout = supervision_timeout; 3928 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3929 hci_run(); 3930 return 0; 3931 } 3932 3933 /** 3934 * @brief Request an update of the connection parameter for a given LE connection 3935 * @param handle 3936 * @param conn_interval_min (unit: 1.25ms) 3937 * @param conn_interval_max (unit: 1.25ms) 3938 * @param conn_latency 3939 * @param supervision_timeout (unit: 10ms) 3940 * @returns 0 if ok 3941 */ 3942 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3943 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3944 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3945 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3946 connection->le_conn_interval_min = conn_interval_min; 3947 connection->le_conn_interval_max = conn_interval_max; 3948 connection->le_conn_latency = conn_latency; 3949 connection->le_supervision_timeout = supervision_timeout; 3950 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3951 hci_run(); 3952 return 0; 3953 } 3954 3955 #ifdef ENABLE_LE_PERIPHERAL 3956 3957 static void gap_advertisments_changed(void){ 3958 // disable advertisements before updating adv, scan data, or adv params 3959 if (hci_stack->le_advertisements_active){ 3960 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3961 } 3962 hci_run(); 3963 } 3964 3965 /** 3966 * @brief Set Advertisement Data 3967 * @param advertising_data_length 3968 * @param advertising_data (max 31 octets) 3969 * @note data is not copied, pointer has to stay valid 3970 */ 3971 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3972 hci_stack->le_advertisements_data_len = advertising_data_length; 3973 hci_stack->le_advertisements_data = advertising_data; 3974 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3975 gap_advertisments_changed(); 3976 } 3977 3978 /** 3979 * @brief Set Scan Response Data 3980 * @param advertising_data_length 3981 * @param advertising_data (max 31 octets) 3982 * @note data is not copied, pointer has to stay valid 3983 */ 3984 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3985 hci_stack->le_scan_response_data_len = scan_response_data_length; 3986 hci_stack->le_scan_response_data = scan_response_data; 3987 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3988 gap_advertisments_changed(); 3989 } 3990 3991 /** 3992 * @brief Set Advertisement Parameters 3993 * @param adv_int_min 3994 * @param adv_int_max 3995 * @param adv_type 3996 * @param direct_address_type 3997 * @param direct_address 3998 * @param channel_map 3999 * @param filter_policy 4000 * 4001 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4002 */ 4003 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4004 uint8_t direct_address_typ, bd_addr_t direct_address, 4005 uint8_t channel_map, uint8_t filter_policy) { 4006 4007 hci_stack->le_advertisements_interval_min = adv_int_min; 4008 hci_stack->le_advertisements_interval_max = adv_int_max; 4009 hci_stack->le_advertisements_type = adv_type; 4010 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4011 hci_stack->le_advertisements_channel_map = channel_map; 4012 hci_stack->le_advertisements_filter_policy = filter_policy; 4013 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4014 4015 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4016 gap_advertisments_changed(); 4017 } 4018 4019 /** 4020 * @brief Enable/Disable Advertisements 4021 * @param enabled 4022 */ 4023 void gap_advertisements_enable(int enabled){ 4024 hci_stack->le_advertisements_enabled = enabled; 4025 if (enabled && !hci_stack->le_advertisements_active){ 4026 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4027 } 4028 if (!enabled && hci_stack->le_advertisements_active){ 4029 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4030 } 4031 hci_run(); 4032 } 4033 4034 #endif 4035 4036 void hci_le_set_own_address_type(uint8_t own_address_type){ 4037 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4038 if (own_address_type == hci_stack->le_own_addr_type) return; 4039 hci_stack->le_own_addr_type = own_address_type; 4040 4041 #ifdef ENABLE_LE_PERIPHERAL 4042 // update advertisement parameters, too 4043 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4044 gap_advertisments_changed(); 4045 #endif 4046 #ifdef ENABLE_LE_CENTRAL 4047 // note: we don't update scan parameters or modify ongoing connection attempts 4048 #endif 4049 } 4050 4051 #endif 4052 4053 uint8_t gap_disconnect(hci_con_handle_t handle){ 4054 hci_connection_t * conn = hci_connection_for_handle(handle); 4055 if (!conn){ 4056 hci_emit_disconnection_complete(handle, 0); 4057 return 0; 4058 } 4059 conn->state = SEND_DISCONNECT; 4060 hci_run(); 4061 return 0; 4062 } 4063 4064 /** 4065 * @brief Get connection type 4066 * @param con_handle 4067 * @result connection_type 4068 */ 4069 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4070 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4071 if (!conn) return GAP_CONNECTION_INVALID; 4072 switch (conn->address_type){ 4073 case BD_ADDR_TYPE_LE_PUBLIC: 4074 case BD_ADDR_TYPE_LE_RANDOM: 4075 return GAP_CONNECTION_LE; 4076 case BD_ADDR_TYPE_SCO: 4077 return GAP_CONNECTION_SCO; 4078 case BD_ADDR_TYPE_CLASSIC: 4079 return GAP_CONNECTION_ACL; 4080 default: 4081 return GAP_CONNECTION_INVALID; 4082 } 4083 } 4084 4085 #ifdef ENABLE_BLE 4086 4087 #ifdef ENABLE_LE_CENTRAL 4088 /** 4089 * @brief Auto Connection Establishment - Start Connecting to device 4090 * @param address_typ 4091 * @param address 4092 * @returns 0 if ok 4093 */ 4094 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4095 // check capacity 4096 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4097 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4098 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4099 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4100 entry->address_type = address_type; 4101 memcpy(entry->address, address, 6); 4102 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4103 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4104 hci_run(); 4105 return 0; 4106 } 4107 4108 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4109 btstack_linked_list_iterator_t it; 4110 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4111 while (btstack_linked_list_iterator_has_next(&it)){ 4112 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4113 if (entry->address_type != address_type) continue; 4114 if (memcmp(entry->address, address, 6) != 0) continue; 4115 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4116 // remove from controller if already present 4117 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4118 continue; 4119 } 4120 // direclty remove entry from whitelist 4121 btstack_linked_list_iterator_remove(&it); 4122 btstack_memory_whitelist_entry_free(entry); 4123 } 4124 } 4125 4126 /** 4127 * @brief Auto Connection Establishment - Stop Connecting to device 4128 * @param address_typ 4129 * @param address 4130 * @returns 0 if ok 4131 */ 4132 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4133 hci_remove_from_whitelist(address_type, address); 4134 hci_run(); 4135 return 0; 4136 } 4137 4138 /** 4139 * @brief Auto Connection Establishment - Stop everything 4140 * @note Convenience function to stop all active auto connection attempts 4141 */ 4142 void gap_auto_connection_stop_all(void){ 4143 btstack_linked_list_iterator_t it; 4144 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4145 while (btstack_linked_list_iterator_has_next(&it)){ 4146 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4147 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4148 // remove from controller if already present 4149 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4150 continue; 4151 } 4152 // directly remove entry from whitelist 4153 btstack_linked_list_iterator_remove(&it); 4154 btstack_memory_whitelist_entry_free(entry); 4155 } 4156 hci_run(); 4157 } 4158 #endif 4159 #endif 4160 4161 #ifdef ENABLE_CLASSIC 4162 /** 4163 * @brief Set Extended Inquiry Response data 4164 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4165 * @note has to be done before stack starts up 4166 */ 4167 void gap_set_extended_inquiry_response(const uint8_t * data){ 4168 hci_stack->eir_data = data; 4169 } 4170 4171 /** 4172 * @brief Start GAP Classic Inquiry 4173 * @param duration in 1.28s units 4174 * @return 0 if ok 4175 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4176 */ 4177 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4178 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4179 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4180 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4181 } 4182 hci_stack->inquiry_state = duration_in_1280ms_units; 4183 hci_run(); 4184 return 0; 4185 } 4186 4187 /** 4188 * @brief Stop GAP Classic Inquiry 4189 * @returns 0 if ok 4190 */ 4191 int gap_inquiry_stop(void){ 4192 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4193 // emit inquiry complete event, before it even started 4194 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4195 hci_emit_event(event, sizeof(event), 1); 4196 return 0; 4197 } 4198 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4199 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4200 hci_run(); 4201 return 0; 4202 } 4203 4204 4205 /** 4206 * @brief Remote Name Request 4207 * @param addr 4208 * @param page_scan_repetition_mode 4209 * @param clock_offset only used when bit 15 is set 4210 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4211 */ 4212 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4213 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4214 memcpy(hci_stack->remote_name_addr, addr, 6); 4215 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4216 hci_stack->remote_name_clock_offset = clock_offset; 4217 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4218 hci_run(); 4219 return 0; 4220 } 4221 4222 /** 4223 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4224 * @param inquiry_mode see bluetooth_defines.h 4225 */ 4226 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4227 hci_stack->inquiry_mode = mode; 4228 } 4229 4230 /** 4231 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4232 */ 4233 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4234 hci_stack->sco_voice_setting = voice_setting; 4235 } 4236 4237 /** 4238 * @brief Get SCO Voice Setting 4239 * @return current voice setting 4240 */ 4241 uint16_t hci_get_sco_voice_setting(void){ 4242 return hci_stack->sco_voice_setting; 4243 } 4244 4245 /** @brief Get SCO packet length for current SCO Voice setting 4246 * @note Using SCO packets of the exact length is required for USB transfer 4247 * @return Length of SCO packets in bytes (not audio frames) 4248 */ 4249 int hci_get_sco_packet_length(void){ 4250 // see Core Spec for H2 USB Transfer. 4251 if (hci_stack->sco_voice_setting & 0x0020) return 51; 4252 return 27; 4253 } 4254 #endif 4255 4256 /** 4257 * @brief Set callback for Bluetooth Hardware Error 4258 */ 4259 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4260 hci_stack->hardware_error_callback = fn; 4261 } 4262 4263 void hci_disconnect_all(void){ 4264 btstack_linked_list_iterator_t it; 4265 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4266 while (btstack_linked_list_iterator_has_next(&it)){ 4267 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4268 if (con->state == SENT_DISCONNECT) continue; 4269 con->state = SEND_DISCONNECT; 4270 } 4271 hci_run(); 4272 } 4273 4274 uint16_t hci_get_manufacturer(void){ 4275 return hci_stack->manufacturer; 4276 } 4277