1 /* 2 * Copyright (C) 2019 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__ "mesh_access.c" 39 40 #include <string.h> 41 #include <stdio.h> 42 #include <stdarg.h> 43 44 #include "mesh/mesh_access.h" 45 46 #include "btstack_debug.h" 47 #include "btstack_memory.h" 48 #include "btstack_tlv.h" 49 50 #include "mesh/beacon.h" 51 #include "mesh/mesh_foundation.h" 52 #include "mesh/mesh_iv_index_seq_number.h" 53 #include "mesh/mesh_node.h" 54 #include "mesh/mesh_proxy.h" 55 #include "mesh/mesh_upper_transport.h" 56 57 #define MEST_TRANSACTION_TIMEOUT_MS 6000 58 59 static void mesh_access_message_process_handler(mesh_pdu_t * pdu); 60 static void mesh_access_secure_network_beacon_handler(uint8_t packet_type, uint16_t channel, uint8_t * packet, uint16_t size); 61 static void mesh_access_upper_transport_handler(mesh_transport_callback_type_t callback_type, mesh_transport_status_t status, mesh_pdu_t * pdu); 62 static const mesh_operation_t * mesh_model_lookup_operation_by_opcode(mesh_model_t * model, uint32_t opcode); 63 static void mesh_persist_iv_index_and_sequence_number(void); 64 65 // acknowledged messages 66 static btstack_linked_list_t mesh_access_acknowledged_messages; 67 static btstack_timer_source_t mesh_access_acknowledged_timer; 68 69 static uint16_t mid_counter; 70 71 static const btstack_tlv_t * btstack_tlv_singleton_impl; 72 static void * btstack_tlv_singleton_context; 73 74 // Transitions 75 static btstack_linked_list_t transitions; 76 static btstack_timer_source_t transitions_timer; 77 static uint32_t transition_step_min_ms; 78 static uint8_t mesh_transaction_id_counter = 0; 79 80 static void mesh_access_setup_tlv(void){ 81 if (btstack_tlv_singleton_impl) return; 82 btstack_tlv_get_instance(&btstack_tlv_singleton_impl, &btstack_tlv_singleton_context); 83 } 84 85 void mesh_access_init(void){ 86 // register with upper transport 87 mesh_upper_transport_register_access_message_handler(&mesh_access_message_process_handler); 88 mesh_upper_transport_set_higher_layer_handler(&mesh_access_upper_transport_handler); 89 90 // register for secure network beacons 91 beacon_register_for_secure_network_beacons(&mesh_access_secure_network_beacon_handler); 92 93 // register for seq number updates 94 mesh_sequence_number_set_update_callback(&mesh_persist_iv_index_and_sequence_number); 95 } 96 97 void mesh_access_emit_state_update_bool(btstack_packet_handler_t * event_handler, uint8_t element_index, uint32_t model_identifier, 98 model_state_id_t state_identifier, model_state_update_reason_t reason, uint8_t value){ 99 if (event_handler == NULL) return; 100 uint8_t event[14] = {HCI_EVENT_MESH_META, 13, MESH_SUBEVENT_STATE_UPDATE_BOOL}; 101 int pos = 3; 102 event[pos++] = element_index; 103 little_endian_store_32(event, pos, model_identifier); 104 pos += 4; 105 little_endian_store_32(event, pos, (uint32_t)state_identifier); 106 pos += 4; 107 event[pos++] = (uint8_t)reason; 108 event[pos++] = value; 109 (*event_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 110 } 111 112 void mesh_access_emit_state_update_int16(btstack_packet_handler_t * event_handler, uint8_t element_index, uint32_t model_identifier, 113 model_state_id_t state_identifier, model_state_update_reason_t reason, int16_t value){ 114 if (event_handler == NULL) return; 115 uint8_t event[14] = {HCI_EVENT_MESH_META, 13, MESH_SUBEVENT_STATE_UPDATE_BOOL}; 116 int pos = 3; 117 event[pos++] = element_index; 118 little_endian_store_32(event, pos, model_identifier); 119 pos += 4; 120 little_endian_store_32(event, pos, (uint32_t)state_identifier); 121 pos += 4; 122 event[pos++] = (uint8_t)reason; 123 little_endian_store_16(event, pos, (uint16_t) value); 124 pos += 2; 125 (*event_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 126 } 127 128 uint8_t mesh_access_acknowledged_message_retransmissions(void){ 129 return 3; 130 } 131 132 uint32_t mesh_access_acknowledged_message_timeout_ms(void){ 133 return 30000; 134 } 135 136 #define MESH_ACCESS_OPCODE_INVALID 0xFFFFFFFFu 137 138 void mesh_access_send_unacknowledged_pdu(mesh_pdu_t * pdu){ 139 pdu->ack_opcode = MESH_ACCESS_OPCODE_INVALID;; 140 mesh_upper_transport_send_access_pdu(pdu); 141 } 142 143 void mesh_access_send_acknowledged_pdu(mesh_pdu_t * pdu, uint8_t retransmissions, uint32_t ack_opcode){ 144 pdu->retransmit_count = retransmissions; 145 pdu->ack_opcode = ack_opcode; 146 147 mesh_upper_transport_send_access_pdu(pdu); 148 } 149 150 #define MESH_SUBEVENT_MESSAGE_NOT_ACKNOWLEDGED 0x30 151 152 static void mesh_access_acknowledged_run(btstack_timer_source_t * ts){ 153 UNUSED(ts); 154 155 uint32_t now = btstack_run_loop_get_time_ms(); 156 157 // handle timeouts 158 btstack_linked_list_iterator_t ack_it; 159 btstack_linked_list_iterator_init(&ack_it, &mesh_access_acknowledged_messages); 160 while (btstack_linked_list_iterator_has_next(&ack_it)){ 161 mesh_pdu_t * pdu = (mesh_pdu_t *) btstack_linked_list_iterator_next(&ack_it); 162 if (btstack_time_delta(now, pdu->retransmit_timeout_ms) >= 0) { 163 // remove from list 164 btstack_linked_list_remove(&mesh_access_acknowledged_messages, (btstack_linked_item_t*) pdu); 165 // retransmit or report failure 166 if (pdu->retransmit_count){ 167 pdu->retransmit_count--; 168 mesh_upper_transport_send_access_pdu(pdu); 169 } else { 170 // find correct model and emit error 171 uint16_t src = mesh_pdu_src(pdu); 172 uint16_t dst = mesh_pdu_dst(pdu); 173 mesh_element_t * element = mesh_node_element_for_unicast_address(src); 174 if (element){ 175 // find 176 mesh_model_iterator_t model_it; 177 mesh_model_iterator_init(&model_it, element); 178 while (mesh_model_iterator_has_next(&model_it)){ 179 mesh_model_t * model = mesh_model_iterator_next(&model_it); 180 // find opcode in table 181 const mesh_operation_t * operation = mesh_model_lookup_operation_by_opcode(model, pdu->ack_opcode); 182 if (operation == NULL) continue; 183 if (model->model_packet_handler == NULL) continue; 184 // emit event 185 uint8_t event[13]; 186 event[0] = HCI_EVENT_MESH_META; 187 event[1] = sizeof(event) - 2; 188 event[2] = element->element_index; 189 little_endian_store_32(event, 3, model->model_identifier); 190 little_endian_store_32(event, 7, pdu->ack_opcode); 191 little_endian_store_16(event, 11, dst); 192 (*model->model_packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 193 } 194 } 195 196 // free 197 mesh_upper_transport_pdu_free(pdu); 198 } 199 } 200 } 201 202 // find earliest timeout and set timer 203 btstack_linked_list_iterator_init(&ack_it, &mesh_access_acknowledged_messages); 204 int32_t next_timeout_ms = 0; 205 while (btstack_linked_list_iterator_has_next(&ack_it)){ 206 mesh_pdu_t * pdu = (mesh_pdu_t *) btstack_linked_list_iterator_next(&ack_it); 207 int32_t timeout_delta_ms = btstack_time_delta(pdu->retransmit_timeout_ms, now); 208 if (next_timeout_ms == 0 || timeout_delta_ms < next_timeout_ms){ 209 next_timeout_ms = timeout_delta_ms; 210 } 211 } 212 213 // set timer 214 if (next_timeout_ms == 0) return; 215 216 btstack_run_loop_set_timer(&mesh_access_acknowledged_timer, next_timeout_ms); 217 btstack_run_loop_set_timer_handler(&mesh_access_acknowledged_timer, mesh_access_acknowledged_run); 218 btstack_run_loop_add_timer(&mesh_access_acknowledged_timer); 219 } 220 221 static void mesh_access_acknowledged_received(uint16_t rx_src, uint32_t opcode){ 222 // check if received src matches our dest 223 // free acknowledged messages if we were waiting for this message 224 225 btstack_linked_list_iterator_t ack_it; 226 btstack_linked_list_iterator_init(&ack_it, &mesh_access_acknowledged_messages); 227 while (btstack_linked_list_iterator_has_next(&ack_it)){ 228 mesh_pdu_t * tx_pdu = (mesh_pdu_t *) btstack_linked_list_iterator_next(&ack_it); 229 uint16_t tx_dest = mesh_pdu_dst(tx_pdu); 230 if (tx_dest != rx_src) continue; 231 if (tx_pdu->ack_opcode != opcode) continue; 232 // got expected response from dest, remove from outgoing messages 233 mesh_upper_transport_pdu_free(tx_pdu); 234 return; 235 } 236 } 237 238 static void mesh_access_upper_transport_handler(mesh_transport_callback_type_t callback_type, mesh_transport_status_t status, mesh_pdu_t * pdu){ 239 switch (callback_type){ 240 case MESH_TRANSPORT_PDU_SENT: 241 // unacknowledged -> free 242 if (pdu->ack_opcode == MESH_ACCESS_OPCODE_INVALID){ 243 mesh_upper_transport_pdu_free(pdu); 244 break; 245 } 246 // setup timeout 247 pdu->retransmit_timeout_ms = btstack_run_loop_get_time_ms() + mesh_access_acknowledged_message_timeout_ms(); 248 // add to mesh_access_acknowledged_messages 249 btstack_linked_list_add(&mesh_access_acknowledged_messages, (btstack_linked_item_t *) pdu); 250 // update timer 251 mesh_access_acknowledged_run(NULL); 252 break; 253 default: 254 break; 255 } 256 } 257 258 // Mesh Model Transitions 259 260 void mesh_access_transitions_setup_transaction(mesh_transition_t * transition, uint8_t transaction_identifier, uint16_t src_address, uint16_t dst_address){ 261 transition->transaction_timestamp_ms = btstack_run_loop_get_time_ms(); 262 transition->transaction_identifier = transaction_identifier; 263 transition->src_address = src_address; 264 transition->dst_address = dst_address; 265 } 266 267 void mesh_access_transitions_abort_transaction(mesh_transition_t * transition){ 268 mesh_access_transitions_remove(transition); 269 } 270 271 272 static int mesh_access_transitions_transaction_is_expired(mesh_transition_t * transition){ 273 return (btstack_run_loop_get_time_ms() - transition->transaction_timestamp_ms) > MEST_TRANSACTION_TIMEOUT_MS; 274 } 275 276 mesh_transaction_status_t mesh_access_transitions_transaction_status(mesh_transition_t * transition, uint8_t transaction_identifier, uint16_t src_address, uint16_t dst_address){ 277 if (transition->src_address != src_address || transition->dst_address != dst_address) return MESH_TRANSACTION_STATUS_DIFFERENT_DST_OR_SRC; 278 279 if (transition->transaction_identifier == transaction_identifier && !mesh_access_transitions_transaction_is_expired(transition)){ 280 return MESH_TRANSACTION_STATUS_RETRANSMISSION; 281 } 282 return MESH_TRANSACTION_STATUS_NEW; 283 } 284 285 uint8_t mesh_access_transitions_num_steps_from_gdtt(uint8_t time_gdtt){ 286 return time_gdtt >> 2; 287 } 288 289 static uint32_t mesh_access_transitions_step_ms_from_gdtt(uint8_t time_gdtt){ 290 mesh_default_transition_step_resolution_t step_resolution = (mesh_default_transition_step_resolution_t) (time_gdtt & 0x03u); 291 switch (step_resolution){ 292 case MESH_DEFAULT_TRANSITION_STEP_RESOLUTION_100ms: 293 return 100; 294 case MESH_DEFAULT_TRANSITION_STEP_RESOLUTION_1s: 295 return 1000; 296 case MESH_DEFAULT_TRANSITION_STEP_RESOLUTION_10s: 297 return 10000; 298 case MESH_DEFAULT_TRANSITION_STEP_RESOLUTION_10min: 299 return 600000; 300 default: 301 return 0; 302 } 303 } 304 305 uint32_t mesh_access_time_gdtt2ms(uint8_t time_gdtt){ 306 uint8_t num_steps = mesh_access_transitions_num_steps_from_gdtt(time_gdtt); 307 if (num_steps > 0x3E) return 0; 308 309 return mesh_access_transitions_step_ms_from_gdtt(time_gdtt) * num_steps; 310 } 311 312 static void mesh_access_transitions_timeout_handler(btstack_timer_source_t * timer){ 313 btstack_linked_list_iterator_t it; 314 btstack_linked_list_iterator_init(&it, &transitions); 315 while (btstack_linked_list_iterator_has_next(&it)){ 316 mesh_transition_t * transition = (mesh_transition_t *)btstack_linked_list_iterator_next(&it); 317 (transition->transition_callback)(transition, TRANSITION_UPDATE, btstack_run_loop_get_time_ms()); 318 } 319 if (btstack_linked_list_empty(&transitions)) return; 320 321 btstack_run_loop_set_timer(timer, transition_step_min_ms); 322 btstack_run_loop_add_timer(timer); 323 } 324 325 static void mesh_access_transitions_timer_start(void){ 326 btstack_run_loop_remove_timer(&transitions_timer); 327 btstack_run_loop_set_timer_handler(&transitions_timer, mesh_access_transitions_timeout_handler); 328 btstack_run_loop_set_timer(&transitions_timer, transition_step_min_ms); 329 btstack_run_loop_add_timer(&transitions_timer); 330 } 331 332 static void mesh_access_transitions_timer_stop(void){ 333 btstack_run_loop_remove_timer(&transitions_timer); 334 } 335 336 static uint32_t mesh_access_transitions_get_step_min_ms(void){ 337 uint32_t min_timeout_ms = 0; 338 339 btstack_linked_list_iterator_t it; 340 btstack_linked_list_iterator_init(&it, &transitions); 341 while (btstack_linked_list_iterator_has_next(&it)){ 342 mesh_transition_t * transition = (mesh_transition_t *)btstack_linked_list_iterator_next(&it); 343 if (min_timeout_ms == 0 || transition->step_duration_ms < min_timeout_ms){ 344 min_timeout_ms = transition->step_duration_ms; 345 } 346 } 347 return min_timeout_ms; 348 } 349 350 void mesh_access_transitions_setup(mesh_transition_t * transition, mesh_model_t * mesh_model, 351 uint8_t transition_time_gdtt, uint8_t delay_gdtt, 352 void (* transition_callback)(struct mesh_transition * transition, transition_event_t event, uint32_t current_timestamp)){ 353 354 // Only values of 0x00 through 0x3E shall be used to specify the value of the Transition Number of Steps field 355 uint8_t num_steps = mesh_access_transitions_num_steps_from_gdtt(transition_time_gdtt); 356 if (num_steps > 0x3E) return; 357 358 transition->state = MESH_TRANSITION_STATE_IDLE; 359 transition->phase_start_ms = 0; 360 361 transition->mesh_model = mesh_model; 362 transition->transition_callback = transition_callback; 363 transition->step_duration_ms = mesh_access_transitions_step_ms_from_gdtt(transition_time_gdtt); 364 transition->remaining_delay_time_ms = delay_gdtt * 5; 365 transition->remaining_transition_time_ms = num_steps * transition->step_duration_ms; 366 } 367 368 void mesh_access_transitions_add(mesh_transition_t * transition){ 369 if (transition->step_duration_ms == 0) return; 370 371 if (btstack_linked_list_empty(&transitions) || transition->step_duration_ms < transition_step_min_ms){ 372 transition_step_min_ms = transition->step_duration_ms; 373 } 374 mesh_access_transitions_timer_start(); 375 btstack_linked_list_add(&transitions, (btstack_linked_item_t *) transition); 376 (transition->transition_callback)(transition, TRANSITION_START, btstack_run_loop_get_time_ms()); 377 } 378 379 void mesh_access_transitions_remove(mesh_transition_t * transition){ 380 mesh_access_transitions_setup(transition, NULL, 0, 0, NULL); 381 btstack_linked_list_remove(&transitions, (btstack_linked_item_t *) transition); 382 383 if (btstack_linked_list_empty(&transitions)){ 384 mesh_access_transitions_timer_stop(); 385 } else { 386 transition_step_min_ms = mesh_access_transitions_get_step_min_ms(); 387 } 388 } 389 390 uint8_t mesh_access_transactions_get_next_transaction_id(void){ 391 mesh_transaction_id_counter++; 392 if (mesh_transaction_id_counter == 0){ 393 mesh_transaction_id_counter = 1; 394 } 395 return mesh_transaction_id_counter; 396 } 397 398 // Mesh Node Element functions 399 uint8_t mesh_access_get_element_index(mesh_model_t * mesh_model){ 400 return mesh_model->element->element_index; 401 } 402 403 uint16_t mesh_access_get_element_address(mesh_model_t * mesh_model){ 404 return mesh_node_get_primary_element_address() + mesh_model->element->element_index; 405 } 406 407 // Model Identifier utilities 408 409 uint32_t mesh_model_get_model_identifier(uint16_t vendor_id, uint16_t model_id){ 410 return (vendor_id << 16) | model_id; 411 } 412 413 uint32_t mesh_model_get_model_identifier_bluetooth_sig(uint16_t model_id){ 414 return (BLUETOOTH_COMPANY_ID_BLUETOOTH_SIG_INC << 16) | model_id; 415 } 416 417 uint16_t mesh_model_get_model_id(uint32_t model_identifier){ 418 return model_identifier & 0xFFFFu; 419 } 420 421 uint16_t mesh_model_get_vendor_id(uint32_t model_identifier){ 422 return model_identifier >> 16; 423 } 424 425 int mesh_model_is_bluetooth_sig(uint32_t model_identifier){ 426 return mesh_model_get_vendor_id(model_identifier) == BLUETOOTH_COMPANY_ID_BLUETOOTH_SIG_INC; 427 } 428 429 mesh_model_t * mesh_model_get_configuration_server(void){ 430 return mesh_model_get_by_identifier(mesh_node_get_primary_element(), mesh_model_get_model_identifier_bluetooth_sig(MESH_SIG_MODEL_ID_CONFIGURATION_SERVER)); 431 } 432 433 void mesh_element_add_model(mesh_element_t * element, mesh_model_t * mesh_model){ 434 if (mesh_model_is_bluetooth_sig(mesh_model->model_identifier)){ 435 element->models_count_sig++; 436 } else { 437 element->models_count_vendor++; 438 } 439 mesh_model->mid = mid_counter++; 440 mesh_model->element = element; 441 btstack_linked_list_add_tail(&element->models, (btstack_linked_item_t *) mesh_model); 442 } 443 444 void mesh_model_iterator_init(mesh_model_iterator_t * iterator, mesh_element_t * element){ 445 btstack_linked_list_iterator_init(&iterator->it, &element->models); 446 } 447 448 int mesh_model_iterator_has_next(mesh_model_iterator_t * iterator){ 449 return btstack_linked_list_iterator_has_next(&iterator->it); 450 } 451 452 mesh_model_t * mesh_model_iterator_next(mesh_model_iterator_t * iterator){ 453 return (mesh_model_t *) btstack_linked_list_iterator_next(&iterator->it); 454 } 455 456 mesh_model_t * mesh_model_get_by_identifier(mesh_element_t * element, uint32_t model_identifier){ 457 mesh_model_iterator_t it; 458 mesh_model_iterator_init(&it, element); 459 while (mesh_model_iterator_has_next(&it)){ 460 mesh_model_t * model = mesh_model_iterator_next(&it); 461 if (model->model_identifier != model_identifier) continue; 462 return model; 463 } 464 return NULL; 465 } 466 467 mesh_model_t * mesh_access_model_for_address_and_model_identifier(uint16_t element_address, uint32_t model_identifier, uint8_t * status){ 468 mesh_element_t * element = mesh_node_element_for_unicast_address(element_address); 469 if (element == NULL){ 470 *status = MESH_FOUNDATION_STATUS_INVALID_ADDRESS; 471 return NULL; 472 } 473 mesh_model_t * model = mesh_model_get_by_identifier(element, model_identifier); 474 if (model == NULL) { 475 *status = MESH_FOUNDATION_STATUS_INVALID_MODEL; 476 } else { 477 *status = MESH_FOUNDATION_STATUS_SUCCESS; 478 } 479 return model; 480 } 481 482 uint16_t mesh_pdu_src(mesh_pdu_t * pdu){ 483 switch (pdu->pdu_type){ 484 case MESH_PDU_TYPE_TRANSPORT: 485 return mesh_transport_src((mesh_transport_pdu_t*) pdu); 486 case MESH_PDU_TYPE_NETWORK: 487 return mesh_network_src((mesh_network_pdu_t *) pdu); 488 default: 489 return MESH_ADDRESS_UNSASSIGNED; 490 } 491 } 492 493 uint16_t mesh_pdu_dst(mesh_pdu_t * pdu){ 494 switch (pdu->pdu_type){ 495 case MESH_PDU_TYPE_TRANSPORT: 496 return mesh_transport_dst((mesh_transport_pdu_t*) pdu); 497 case MESH_PDU_TYPE_NETWORK: 498 return mesh_network_dst((mesh_network_pdu_t *) pdu); 499 default: 500 return MESH_ADDRESS_UNSASSIGNED; 501 } 502 } 503 504 uint16_t mesh_pdu_netkey_index(mesh_pdu_t * pdu){ 505 switch (pdu->pdu_type){ 506 case MESH_PDU_TYPE_TRANSPORT: 507 return ((mesh_transport_pdu_t*) pdu)->netkey_index; 508 case MESH_PDU_TYPE_NETWORK: 509 return ((mesh_network_pdu_t *) pdu)->netkey_index; 510 default: 511 return 0; 512 } 513 } 514 515 uint16_t mesh_pdu_appkey_index(mesh_pdu_t * pdu){ 516 switch (pdu->pdu_type){ 517 case MESH_PDU_TYPE_TRANSPORT: 518 return ((mesh_transport_pdu_t*) pdu)->appkey_index; 519 case MESH_PDU_TYPE_NETWORK: 520 return ((mesh_network_pdu_t *) pdu)->appkey_index; 521 default: 522 return 0; 523 } 524 } 525 526 uint16_t mesh_pdu_len(mesh_pdu_t * pdu){ 527 switch (pdu->pdu_type){ 528 case MESH_PDU_TYPE_TRANSPORT: 529 return ((mesh_transport_pdu_t*) pdu)->len; 530 case MESH_PDU_TYPE_NETWORK: 531 return ((mesh_network_pdu_t *) pdu)->len - 10; 532 default: 533 return 0; 534 } 535 } 536 537 uint8_t * mesh_pdu_data(mesh_pdu_t * pdu){ 538 switch (pdu->pdu_type){ 539 case MESH_PDU_TYPE_TRANSPORT: 540 return ((mesh_transport_pdu_t*) pdu)->data; 541 case MESH_PDU_TYPE_NETWORK: 542 return &((mesh_network_pdu_t *) pdu)->data[10]; 543 default: 544 return NULL; 545 } 546 } 547 548 // message parser 549 550 static int mesh_access_get_opcode(uint8_t * buffer, uint16_t buffer_size, uint32_t * opcode, uint16_t * opcode_size){ 551 switch (buffer[0] >> 6){ 552 case 0: 553 case 1: 554 if (buffer[0] == 0x7f) return 0; 555 *opcode = buffer[0]; 556 *opcode_size = 1; 557 return 1; 558 case 2: 559 if (buffer_size < 2) return 0; 560 *opcode = big_endian_read_16(buffer, 0); 561 *opcode_size = 2; 562 return 1; 563 case 3: 564 if (buffer_size < 3) return 0; 565 *opcode = (buffer[0] << 16) | little_endian_read_16(buffer, 1); 566 *opcode_size = 3; 567 return 1; 568 default: 569 return 0; 570 } 571 } 572 573 static int mesh_access_transport_get_opcode(mesh_transport_pdu_t * transport_pdu, uint32_t * opcode, uint16_t * opcode_size){ 574 return mesh_access_get_opcode(transport_pdu->data, transport_pdu->len, opcode, opcode_size); 575 } 576 577 static int mesh_access_network_get_opcode(mesh_network_pdu_t * network_pdu, uint32_t * opcode, uint16_t * opcode_size){ 578 // TransMIC already removed by mesh_upper_transport_validate_unsegmented_message_ccm 579 return mesh_access_get_opcode(&network_pdu->data[10], network_pdu->len - 10, opcode, opcode_size); 580 } 581 582 int mesh_access_pdu_get_opcode(mesh_pdu_t * pdu, uint32_t * opcode, uint16_t * opcode_size){ 583 switch (pdu->pdu_type){ 584 case MESH_PDU_TYPE_TRANSPORT: 585 return mesh_access_transport_get_opcode((mesh_transport_pdu_t*) pdu, opcode, opcode_size); 586 case MESH_PDU_TYPE_NETWORK: 587 return mesh_access_network_get_opcode((mesh_network_pdu_t *) pdu, opcode, opcode_size); 588 default: 589 return 0; 590 } 591 } 592 593 void mesh_access_parser_skip(mesh_access_parser_state_t * state, uint16_t bytes_to_skip){ 594 state->data += bytes_to_skip; 595 state->len -= bytes_to_skip; 596 } 597 598 int mesh_access_parser_init(mesh_access_parser_state_t * state, mesh_pdu_t * pdu){ 599 state->data = mesh_pdu_data(pdu); 600 state->len = mesh_pdu_len(pdu); 601 602 uint16_t opcode_size = 0; 603 int ok = mesh_access_get_opcode(state->data, state->len, &state->opcode, &opcode_size); 604 if (ok){ 605 mesh_access_parser_skip(state, opcode_size); 606 } 607 return ok; 608 } 609 610 uint16_t mesh_access_parser_available(mesh_access_parser_state_t * state){ 611 return state->len; 612 } 613 614 uint8_t mesh_access_parser_get_u8(mesh_access_parser_state_t * state){ 615 uint8_t value = *state->data; 616 mesh_access_parser_skip(state, 1); 617 return value; 618 } 619 620 uint16_t mesh_access_parser_get_u16(mesh_access_parser_state_t * state){ 621 uint16_t value = little_endian_read_16(state->data, 0); 622 mesh_access_parser_skip(state, 2); 623 return value; 624 } 625 626 uint32_t mesh_access_parser_get_u24(mesh_access_parser_state_t * state){ 627 uint32_t value = little_endian_read_24(state->data, 0); 628 mesh_access_parser_skip(state, 3); 629 return value; 630 } 631 632 uint32_t mesh_access_parser_get_u32(mesh_access_parser_state_t * state){ 633 uint32_t value = little_endian_read_24(state->data, 0); 634 mesh_access_parser_skip(state, 4); 635 return value; 636 } 637 638 void mesh_access_parser_get_u128(mesh_access_parser_state_t * state, uint8_t * dest){ 639 reverse_128( state->data, dest); 640 mesh_access_parser_skip(state, 16); 641 } 642 643 void mesh_access_parser_get_label_uuid(mesh_access_parser_state_t * state, uint8_t * dest){ 644 memcpy( dest, state->data, 16); 645 mesh_access_parser_skip(state, 16); 646 } 647 648 void mesh_access_parser_get_key(mesh_access_parser_state_t * state, uint8_t * dest){ 649 memcpy( dest, state->data, 16); 650 mesh_access_parser_skip(state, 16); 651 } 652 653 uint32_t mesh_access_parser_get_model_identifier(mesh_access_parser_state_t * parser){ 654 if (mesh_access_parser_available(parser) == 4){ 655 return mesh_access_parser_get_u32(parser); 656 } else { 657 return (BLUETOOTH_COMPANY_ID_BLUETOOTH_SIG_INC << 16) | mesh_access_parser_get_u16(parser); 658 } 659 } 660 661 // Mesh Access Message Builder 662 663 // message builder 664 665 static int mesh_access_setup_opcode(uint8_t * buffer, uint32_t opcode){ 666 if (opcode < 0x100){ 667 buffer[0] = opcode; 668 return 1; 669 } 670 if (opcode < 0x10000){ 671 big_endian_store_16(buffer, 0, opcode); 672 return 2; 673 } 674 buffer[0] = opcode >> 16; 675 little_endian_store_16(buffer, 1, opcode & 0xffff); 676 return 3; 677 } 678 679 mesh_transport_pdu_t * mesh_access_transport_init(uint32_t opcode){ 680 mesh_transport_pdu_t * pdu = mesh_transport_pdu_get(); 681 if (!pdu) return NULL; 682 683 pdu->len = mesh_access_setup_opcode(pdu->data, opcode); 684 return pdu; 685 } 686 687 void mesh_access_transport_add_uint8(mesh_transport_pdu_t * pdu, uint8_t value){ 688 pdu->data[pdu->len++] = value; 689 } 690 691 void mesh_access_transport_add_uint16(mesh_transport_pdu_t * pdu, uint16_t value){ 692 little_endian_store_16(pdu->data, pdu->len, value); 693 pdu->len += 2; 694 } 695 696 void mesh_access_transport_add_uint24(mesh_transport_pdu_t * pdu, uint32_t value){ 697 little_endian_store_24(pdu->data, pdu->len, value); 698 pdu->len += 3; 699 } 700 701 void mesh_access_transport_add_uint32(mesh_transport_pdu_t * pdu, uint32_t value){ 702 little_endian_store_32(pdu->data, pdu->len, value); 703 pdu->len += 4; 704 } 705 void mesh_access_transport_add_model_identifier(mesh_transport_pdu_t * pdu, uint32_t model_identifier){ 706 if (mesh_model_is_bluetooth_sig(model_identifier)){ 707 mesh_access_transport_add_uint16( pdu, mesh_model_get_model_id(model_identifier) ); 708 } else { 709 mesh_access_transport_add_uint32( pdu, model_identifier ); 710 } 711 } 712 713 mesh_network_pdu_t * mesh_access_network_init(uint32_t opcode){ 714 mesh_network_pdu_t * pdu = mesh_network_pdu_get(); 715 if (!pdu) return NULL; 716 717 pdu->len = mesh_access_setup_opcode(&pdu->data[10], opcode) + 10; 718 return pdu; 719 } 720 721 void mesh_access_network_add_uint8(mesh_network_pdu_t * pdu, uint8_t value){ 722 pdu->data[pdu->len++] = value; 723 } 724 725 void mesh_access_network_add_uint16(mesh_network_pdu_t * pdu, uint16_t value){ 726 little_endian_store_16(pdu->data, pdu->len, value); 727 pdu->len += 2; 728 } 729 730 void mesh_access_network_add_uint24(mesh_network_pdu_t * pdu, uint16_t value){ 731 little_endian_store_24(pdu->data, pdu->len, value); 732 pdu->len += 3; 733 } 734 735 void mesh_access_network_add_uint32(mesh_network_pdu_t * pdu, uint16_t value){ 736 little_endian_store_32(pdu->data, pdu->len, value); 737 pdu->len += 4; 738 } 739 740 void mesh_access_network_add_model_identifier(mesh_network_pdu_t * pdu, uint32_t model_identifier){ 741 if (mesh_model_is_bluetooth_sig(model_identifier)){ 742 mesh_access_network_add_uint16( pdu, mesh_model_get_model_id(model_identifier) ); 743 } else { 744 mesh_access_network_add_uint32( pdu, model_identifier ); 745 } 746 } 747 748 // access message template 749 750 mesh_network_pdu_t * mesh_access_setup_unsegmented_message(const mesh_access_message_t *template, ...){ 751 mesh_network_pdu_t * network_pdu = mesh_access_network_init(template->opcode); 752 if (!network_pdu) return NULL; 753 754 va_list argptr; 755 va_start(argptr, template); 756 757 // add params 758 const char * format = template->format; 759 uint16_t word; 760 uint32_t longword; 761 while (*format){ 762 switch (*format){ 763 case '1': 764 word = va_arg(argptr, int); // minimal va_arg is int: 2 bytes on 8+16 bit CPUs 765 mesh_access_network_add_uint8( network_pdu, word); 766 break; 767 case '2': 768 word = va_arg(argptr, int); // minimal va_arg is int: 2 bytes on 8+16 bit CPUs 769 mesh_access_network_add_uint16( network_pdu, word); 770 break; 771 case '3': 772 longword = va_arg(argptr, uint32_t); 773 mesh_access_network_add_uint24( network_pdu, longword); 774 break; 775 case '4': 776 longword = va_arg(argptr, uint32_t); 777 mesh_access_network_add_uint32( network_pdu, longword); 778 break; 779 case 'm': 780 longword = va_arg(argptr, uint32_t); 781 mesh_access_network_add_model_identifier( network_pdu, longword); 782 break; 783 default: 784 log_error("Unsupported mesh message format specifier '%c", *format); 785 break; 786 } 787 format++; 788 } 789 790 va_end(argptr); 791 792 return network_pdu; 793 } 794 795 mesh_transport_pdu_t * mesh_access_setup_segmented_message(const mesh_access_message_t *template, ...){ 796 mesh_transport_pdu_t * transport_pdu = mesh_access_transport_init(template->opcode); 797 if (!transport_pdu) return NULL; 798 799 va_list argptr; 800 va_start(argptr, template); 801 802 // add params 803 const char * format = template->format; 804 uint16_t word; 805 uint32_t longword; 806 while (*format){ 807 switch (*format++){ 808 case '1': 809 word = va_arg(argptr, int); // minimal va_arg is int: 2 bytes on 8+16 bit CPUs 810 mesh_access_transport_add_uint8( transport_pdu, word); 811 break; 812 case '2': 813 word = va_arg(argptr, int); // minimal va_arg is int: 2 bytes on 8+16 bit CPUs 814 mesh_access_transport_add_uint16( transport_pdu, word); 815 break; 816 case '3': 817 longword = va_arg(argptr, uint32_t); 818 mesh_access_transport_add_uint24( transport_pdu, longword); 819 break; 820 case '4': 821 longword = va_arg(argptr, uint32_t); 822 mesh_access_transport_add_uint32( transport_pdu, longword); 823 break; 824 case 'm': 825 longword = va_arg(argptr, uint32_t); 826 mesh_access_transport_add_model_identifier( transport_pdu, longword); 827 break; 828 default: 829 break; 830 } 831 } 832 833 va_end(argptr); 834 835 return transport_pdu; 836 } 837 838 static const mesh_operation_t * mesh_model_lookup_operation_by_opcode(mesh_model_t * model, uint32_t opcode){ 839 // find opcode in table 840 const mesh_operation_t * operation = model->operations; 841 if (operation == NULL) return NULL; 842 for ( ; operation->handler != NULL ; operation++){ 843 if (operation->opcode != opcode) continue; 844 return operation; 845 } 846 return NULL; 847 } 848 849 static const mesh_operation_t * mesh_model_lookup_operation(mesh_model_t * model, mesh_pdu_t * pdu){ 850 851 uint32_t opcode = 0; 852 uint16_t opcode_size = 0; 853 int ok = mesh_access_pdu_get_opcode( pdu, &opcode, &opcode_size); 854 if (!ok) return NULL; 855 856 uint16_t len = mesh_pdu_len(pdu); 857 858 // find opcode in table 859 const mesh_operation_t * operation = model->operations; 860 if (operation == NULL) return NULL; 861 for ( ; operation->handler != NULL ; operation++){ 862 if (operation->opcode != opcode) continue; 863 if ((opcode_size + operation->minimum_length) > len) continue; 864 return operation; 865 } 866 return NULL; 867 } 868 869 static int mesh_access_validate_appkey_index(mesh_model_t * model, uint16_t appkey_index){ 870 // DeviceKey is valid for all models 871 if (appkey_index == MESH_DEVICE_KEY_INDEX) return 1; 872 // check if AppKey that is bound to this particular model 873 return mesh_model_contains_appkey(model, appkey_index); 874 } 875 876 static void mesh_access_message_process_handler(mesh_pdu_t * pdu){ 877 // get opcode and size 878 uint32_t opcode = 0; 879 uint16_t opcode_size = 0; 880 881 882 int ok = mesh_access_pdu_get_opcode( pdu, &opcode, &opcode_size); 883 if (!ok) { 884 mesh_access_message_processed(pdu); 885 return; 886 } 887 888 uint16_t len = mesh_pdu_len(pdu); 889 printf("MESH Access Message, Opcode = %x: ", opcode); 890 switch (pdu->pdu_type){ 891 case MESH_PDU_TYPE_NETWORK: 892 printf_hexdump(&((mesh_network_pdu_t *) pdu)->data[10], len); 893 break; 894 case MESH_PDU_TYPE_TRANSPORT: 895 printf_hexdump(((mesh_transport_pdu_t *) pdu)->data, len); 896 break; 897 default: 898 break; 899 } 900 901 uint16_t src = mesh_pdu_src(pdu); 902 uint16_t dst = mesh_pdu_dst(pdu); 903 uint16_t appkey_index = mesh_pdu_appkey_index(pdu); 904 if (mesh_network_address_unicast(dst)){ 905 // loookup element by unicast address 906 mesh_element_t * element = mesh_node_element_for_unicast_address(dst); 907 if (element != NULL){ 908 // iterate over models, look for operation 909 mesh_model_iterator_t model_it; 910 mesh_model_iterator_init(&model_it, element); 911 while (mesh_model_iterator_has_next(&model_it)){ 912 mesh_model_t * model = mesh_model_iterator_next(&model_it); 913 // find opcode in table 914 const mesh_operation_t * operation = mesh_model_lookup_operation(model, pdu); 915 if (operation == NULL) break; 916 if (mesh_access_validate_appkey_index(model, appkey_index) == 0) break; 917 mesh_access_acknowledged_received(src, opcode); 918 operation->handler(model, pdu); 919 return; 920 } 921 } 922 } 923 else if (mesh_network_address_group(dst)){ 924 925 // handle fixed group address 926 if (dst >= 0xff00){ 927 int deliver_to_primary_element = 1; 928 switch (dst){ 929 case MESH_ADDRESS_ALL_PROXIES: 930 if (mesh_foundation_gatt_proxy_get() == 1){ 931 deliver_to_primary_element = 1; 932 } 933 break; 934 case MESH_ADDRESS_ALL_FRIENDS: 935 // TODO: not implemented 936 break; 937 case MESH_ADDRESS_ALL_RELAYS: 938 if (mesh_foundation_relay_get() == 1){ 939 deliver_to_primary_element =1; 940 } 941 break; 942 case MESH_ADDRESS_ALL_NODES: 943 deliver_to_primary_element = 1; 944 break; 945 default: 946 break; 947 } 948 if (deliver_to_primary_element){ 949 mesh_model_iterator_t model_it; 950 mesh_model_iterator_init(&model_it, mesh_node_get_primary_element()); 951 while (mesh_model_iterator_has_next(&model_it)){ 952 mesh_model_t * model = mesh_model_iterator_next(&model_it); 953 // find opcode in table 954 const mesh_operation_t * operation = mesh_model_lookup_operation(model, pdu); 955 if (operation == NULL) continue; 956 if (mesh_access_validate_appkey_index(model, appkey_index) == 0) continue; 957 mesh_access_acknowledged_received(src, opcode); 958 operation->handler(model, pdu); 959 return; 960 } 961 } 962 } 963 else { 964 // iterate over all elements / models, check subscription list 965 mesh_element_iterator_t it; 966 mesh_element_iterator_init(&it); 967 while (mesh_element_iterator_has_next(&it)){ 968 mesh_element_t * element = (mesh_element_t *) mesh_element_iterator_next(&it); 969 mesh_model_iterator_t model_it; 970 mesh_model_iterator_init(&model_it, element); 971 while (mesh_model_iterator_has_next(&model_it)){ 972 mesh_model_t * model = mesh_model_iterator_next(&model_it); 973 if (mesh_model_contains_subscription(model, dst)){ 974 // find opcode in table 975 const mesh_operation_t * operation = mesh_model_lookup_operation(model, pdu); 976 if (operation == NULL) continue; 977 if (mesh_access_validate_appkey_index(model, appkey_index) == 0) continue; 978 mesh_access_acknowledged_received(src, opcode); 979 operation->handler(model, pdu); 980 return; 981 } 982 } 983 } 984 } 985 } 986 987 // operation not found -> done 988 printf("Message not handled\n"); 989 mesh_access_message_processed(pdu); 990 } 991 992 void mesh_access_message_processed(mesh_pdu_t * pdu){ 993 mesh_upper_transport_message_processed_by_higher_layer(pdu); 994 } 995 996 int mesh_model_contains_subscription(mesh_model_t * mesh_model, uint16_t address){ 997 uint16_t i; 998 for (i=0;i<MAX_NR_MESH_SUBSCRIPTION_PER_MODEL;i++){ 999 if (mesh_model->subscriptions[i] == address) return 1; 1000 } 1001 return 0; 1002 } 1003 1004 static uint32_t mesh_network_key_tag_for_internal_index(uint16_t internal_index){ 1005 return ((uint32_t) 'M' << 24) | ((uint32_t) 'N' << 16) | ((uint32_t) internal_index); 1006 } 1007 1008 // Foundation state 1009 1010 static const uint32_t mesh_foundation_state_tag = ((uint32_t) 'M' << 24) | ((uint32_t) 'F' << 16) | ((uint32_t) 'N' << 8) | ((uint32_t) 'D' << 8); 1011 1012 typedef struct { 1013 uint8_t gatt_proxy; 1014 uint8_t beacon; 1015 uint8_t default_ttl; 1016 uint8_t network_transmit; 1017 uint8_t relay; 1018 uint8_t relay_retransmit; 1019 uint8_t friend; 1020 } mesh_persistent_foundation_t; 1021 1022 void mesh_foundation_state_load(void){ 1023 mesh_access_setup_tlv(); 1024 mesh_persistent_foundation_t data; 1025 1026 int app_key_len = btstack_tlv_singleton_impl->get_tag(btstack_tlv_singleton_context, mesh_foundation_state_tag, (uint8_t *) &data, sizeof(data)); 1027 if (app_key_len == 0) return; 1028 1029 mesh_foundation_gatt_proxy_set(data.gatt_proxy); 1030 mesh_foundation_beacon_set(data.gatt_proxy); 1031 mesh_foundation_default_ttl_set(data.default_ttl); 1032 mesh_foundation_friend_set(data.friend); 1033 mesh_foundation_network_transmit_set(data.network_transmit); 1034 mesh_foundation_relay_set(data.relay); 1035 mesh_foundation_relay_retransmit_set(data.relay_retransmit); 1036 } 1037 1038 void mesh_foundation_state_store(void){ 1039 mesh_access_setup_tlv(); 1040 mesh_persistent_foundation_t data; 1041 data.gatt_proxy = mesh_foundation_gatt_proxy_get(); 1042 data.gatt_proxy = mesh_foundation_beacon_get(); 1043 data.default_ttl = mesh_foundation_default_ttl_get(); 1044 data.friend = mesh_foundation_friend_get(); 1045 data.network_transmit = mesh_foundation_network_transmit_get(); 1046 data.relay = mesh_foundation_relay_get(); 1047 data.relay_retransmit = mesh_foundation_relay_retransmit_get(); 1048 btstack_tlv_singleton_impl->store_tag(btstack_tlv_singleton_context, mesh_foundation_state_tag, (uint8_t *) &data, sizeof(data)); 1049 } 1050 1051 // Mesh Network Keys 1052 typedef struct { 1053 uint16_t netkey_index; 1054 1055 uint8_t version; 1056 1057 // net_key from provisioner or Config Model Client 1058 uint8_t net_key[16]; 1059 1060 // derived data 1061 1062 // k1 1063 uint8_t identity_key[16]; 1064 uint8_t beacon_key[16]; 1065 1066 // k3 1067 uint8_t network_id[8]; 1068 1069 // k2 1070 uint8_t nid; 1071 uint8_t encryption_key[16]; 1072 uint8_t privacy_key[16]; 1073 } mesh_persistent_net_key_t; 1074 1075 void mesh_store_network_key(mesh_network_key_t * network_key){ 1076 mesh_access_setup_tlv(); 1077 mesh_persistent_net_key_t data; 1078 printf("Store NetKey: internal index 0x%x, NetKey Index 0x%06x, NID %02x: ", network_key->internal_index, network_key->netkey_index, network_key->nid); 1079 printf_hexdump(network_key->net_key, 16); 1080 uint32_t tag = mesh_network_key_tag_for_internal_index(network_key->internal_index); 1081 data.netkey_index = network_key->netkey_index; 1082 memcpy(data.net_key, network_key->net_key, 16); 1083 memcpy(data.identity_key, network_key->identity_key, 16); 1084 memcpy(data.beacon_key, network_key->beacon_key, 16); 1085 memcpy(data.network_id, network_key->network_id, 8); 1086 data.nid = network_key->nid; 1087 data.version = network_key->version; 1088 memcpy(data.encryption_key, network_key->encryption_key, 16); 1089 memcpy(data.privacy_key, network_key->privacy_key, 16); 1090 btstack_tlv_singleton_impl->store_tag(btstack_tlv_singleton_context, tag, (uint8_t *) &data, sizeof(mesh_persistent_net_key_t)); 1091 } 1092 1093 void mesh_delete_network_key(uint16_t internal_index){ 1094 mesh_access_setup_tlv(); 1095 uint32_t tag = mesh_network_key_tag_for_internal_index(internal_index); 1096 btstack_tlv_singleton_impl->delete_tag(btstack_tlv_singleton_context, tag); 1097 } 1098 1099 1100 void mesh_load_network_keys(void){ 1101 mesh_access_setup_tlv(); 1102 printf("Load Network Keys\n"); 1103 uint16_t internal_index; 1104 for (internal_index = 0; internal_index < MAX_NR_MESH_NETWORK_KEYS; internal_index++){ 1105 mesh_persistent_net_key_t data; 1106 uint32_t tag = mesh_network_key_tag_for_internal_index(internal_index); 1107 int netkey_len = btstack_tlv_singleton_impl->get_tag(btstack_tlv_singleton_context, tag, (uint8_t *) &data, sizeof(data)); 1108 if (netkey_len != sizeof(mesh_persistent_net_key_t)) continue; 1109 1110 mesh_network_key_t * network_key = btstack_memory_mesh_network_key_get(); 1111 if (network_key == NULL) return; 1112 1113 network_key->netkey_index = data.netkey_index; 1114 memcpy(network_key->net_key, data.net_key, 16); 1115 memcpy(network_key->identity_key, data.identity_key, 16); 1116 memcpy(network_key->beacon_key, data.beacon_key, 16); 1117 memcpy(network_key->network_id, data.network_id, 8); 1118 network_key->nid = data.nid; 1119 network_key->version = data.version; 1120 memcpy(network_key->encryption_key, data.encryption_key, 16); 1121 memcpy(network_key->privacy_key, data.privacy_key, 16); 1122 1123 #ifdef ENABLE_GATT_BEARER 1124 // setup advertisement with network id 1125 network_key->advertisement_with_network_id.adv_length = mesh_proxy_setup_advertising_with_network_id(network_key->advertisement_with_network_id.adv_data, network_key->network_id); 1126 #endif 1127 1128 mesh_network_key_add(network_key); 1129 1130 mesh_subnet_setup_for_netkey_index(network_key->netkey_index); 1131 1132 printf("- internal index 0x%x, NetKey Index 0x%06x, NID %02x: ", network_key->internal_index, network_key->netkey_index, network_key->nid); 1133 printf_hexdump(network_key->net_key, 16); 1134 } 1135 } 1136 1137 void mesh_delete_network_keys(void){ 1138 printf("Delete Network Keys\n"); 1139 1140 uint16_t internal_index; 1141 for (internal_index = 0; internal_index < MAX_NR_MESH_NETWORK_KEYS; internal_index++){ 1142 mesh_delete_network_key(internal_index); 1143 } 1144 } 1145 1146 1147 // Mesh App Keys 1148 1149 typedef struct { 1150 uint16_t netkey_index; 1151 uint16_t appkey_index; 1152 uint8_t aid; 1153 uint8_t version; 1154 uint8_t key[16]; 1155 } mesh_persistent_app_key_t; 1156 1157 static uint32_t mesh_transport_key_tag_for_internal_index(uint16_t internal_index){ 1158 return ((uint32_t) 'M' << 24) | ((uint32_t) 'A' << 16) | ((uint32_t) internal_index); 1159 } 1160 1161 void mesh_store_app_key(mesh_transport_key_t * app_key){ 1162 mesh_access_setup_tlv(); 1163 1164 mesh_persistent_app_key_t data; 1165 printf("Store AppKey: internal index 0x%x, AppKey Index 0x%06x, AID %02x: ", app_key->internal_index, app_key->appkey_index, app_key->aid); 1166 printf_hexdump(app_key->key, 16); 1167 uint32_t tag = mesh_transport_key_tag_for_internal_index(app_key->internal_index); 1168 data.netkey_index = app_key->netkey_index; 1169 data.appkey_index = app_key->appkey_index; 1170 data.aid = app_key->aid; 1171 data.version = app_key->version; 1172 memcpy(data.key, app_key->key, 16); 1173 btstack_tlv_singleton_impl->store_tag(btstack_tlv_singleton_context, tag, (uint8_t *) &data, sizeof(data)); 1174 } 1175 1176 void mesh_delete_app_key(uint16_t internal_index){ 1177 mesh_access_setup_tlv(); 1178 1179 uint32_t tag = mesh_transport_key_tag_for_internal_index(internal_index); 1180 btstack_tlv_singleton_impl->delete_tag(btstack_tlv_singleton_context, tag); 1181 } 1182 1183 void mesh_load_app_keys(void){ 1184 mesh_access_setup_tlv(); 1185 printf("Load App Keys\n"); 1186 uint16_t internal_index; 1187 for (internal_index = 0; internal_index < MAX_NR_MESH_TRANSPORT_KEYS; internal_index++){ 1188 mesh_persistent_app_key_t data; 1189 uint32_t tag = mesh_transport_key_tag_for_internal_index(internal_index); 1190 int app_key_len = btstack_tlv_singleton_impl->get_tag(btstack_tlv_singleton_context, tag, (uint8_t *) &data, sizeof(data)); 1191 if (app_key_len == 0) continue; 1192 1193 mesh_transport_key_t * key = btstack_memory_mesh_transport_key_get(); 1194 if (key == NULL) return; 1195 1196 key->internal_index = internal_index; 1197 key->appkey_index = data.appkey_index; 1198 key->netkey_index = data.netkey_index; 1199 key->aid = data.aid; 1200 key->akf = 1; 1201 key->version = data.version; 1202 memcpy(key->key, data.key, 16); 1203 mesh_transport_key_add(key); 1204 printf("- internal index 0x%x, AppKey Index 0x%06x, AID %02x: ", key->internal_index, key->appkey_index, key->aid); 1205 printf_hexdump(key->key, 16); 1206 } 1207 } 1208 1209 void mesh_delete_app_keys(void){ 1210 printf("Delete App Keys\n"); 1211 1212 uint16_t internal_index; 1213 for (internal_index = 0; internal_index < MAX_NR_MESH_TRANSPORT_KEYS; internal_index++){ 1214 mesh_delete_app_key(internal_index); 1215 } 1216 } 1217 1218 1219 // Model to Appkey List 1220 1221 static uint32_t mesh_model_tag_for_index(uint16_t internal_model_id){ 1222 return ((uint32_t) 'M' << 24) | ((uint32_t) 'B' << 16) | ((uint32_t) internal_model_id); 1223 } 1224 1225 static void mesh_load_appkey_list(mesh_model_t * model){ 1226 mesh_access_setup_tlv(); 1227 uint32_t tag = mesh_model_tag_for_index(model->mid); 1228 btstack_tlv_singleton_impl->get_tag(btstack_tlv_singleton_context, tag, (uint8_t *) &model->appkey_indices, sizeof(model->appkey_indices)); 1229 } 1230 1231 static void mesh_store_appkey_list(mesh_model_t * model){ 1232 mesh_access_setup_tlv(); 1233 uint32_t tag = mesh_model_tag_for_index(model->mid); 1234 btstack_tlv_singleton_impl->store_tag(btstack_tlv_singleton_context, tag, (uint8_t *) &model->appkey_indices, sizeof(model->appkey_indices)); 1235 } 1236 1237 static void mesh_delete_appkey_list(mesh_model_t * model){ 1238 mesh_access_setup_tlv(); 1239 uint32_t tag = mesh_model_tag_for_index(model->mid); 1240 btstack_tlv_singleton_impl->delete_tag(btstack_tlv_singleton_context, tag); 1241 } 1242 1243 void mesh_load_appkey_lists(void){ 1244 printf("Load Appkey Lists\n"); 1245 // iterate over elements and models 1246 mesh_element_iterator_t element_it; 1247 mesh_element_iterator_init(&element_it); 1248 while (mesh_element_iterator_has_next(&element_it)){ 1249 mesh_element_t * element = mesh_element_iterator_next(&element_it); 1250 mesh_model_iterator_t model_it; 1251 mesh_model_iterator_init(&model_it, element); 1252 while (mesh_model_iterator_has_next(&model_it)){ 1253 mesh_model_t * model = mesh_model_iterator_next(&model_it); 1254 mesh_load_appkey_list(model); 1255 } 1256 } 1257 } 1258 1259 void mesh_delete_appkey_lists(void){ 1260 printf("Delete Appkey Lists\n"); 1261 mesh_access_setup_tlv(); 1262 // iterate over elements and models 1263 mesh_element_iterator_t element_it; 1264 mesh_element_iterator_init(&element_it); 1265 while (mesh_element_iterator_has_next(&element_it)){ 1266 mesh_element_t * element = mesh_element_iterator_next(&element_it); 1267 mesh_model_iterator_t model_it; 1268 mesh_model_iterator_init(&model_it, element); 1269 while (mesh_model_iterator_has_next(&model_it)){ 1270 mesh_model_t * model = mesh_model_iterator_next(&model_it); 1271 mesh_delete_appkey_list(model); 1272 } 1273 } 1274 } 1275 1276 void mesh_model_reset_appkeys(mesh_model_t * mesh_model){ 1277 uint16_t i; 1278 for (i=0;i<MAX_NR_MESH_APPKEYS_PER_MODEL;i++){ 1279 mesh_model->appkey_indices[i] = MESH_APPKEY_INVALID; 1280 } 1281 } 1282 1283 uint8_t mesh_model_bind_appkey(mesh_model_t * mesh_model, uint16_t appkey_index){ 1284 uint16_t i; 1285 for (i=0;i<MAX_NR_MESH_APPKEYS_PER_MODEL;i++){ 1286 if (mesh_model->appkey_indices[i] == appkey_index) return MESH_FOUNDATION_STATUS_SUCCESS; 1287 } 1288 for (i=0;i<MAX_NR_MESH_APPKEYS_PER_MODEL;i++){ 1289 if (mesh_model->appkey_indices[i] == MESH_APPKEY_INVALID) { 1290 mesh_model->appkey_indices[i] = appkey_index; 1291 mesh_store_appkey_list(mesh_model); 1292 return MESH_FOUNDATION_STATUS_SUCCESS; 1293 } 1294 } 1295 return MESH_FOUNDATION_STATUS_INSUFFICIENT_RESOURCES; 1296 } 1297 1298 void mesh_model_unbind_appkey(mesh_model_t * mesh_model, uint16_t appkey_index){ 1299 uint16_t i; 1300 for (i=0;i<MAX_NR_MESH_APPKEYS_PER_MODEL;i++){ 1301 if (mesh_model->appkey_indices[i] == appkey_index) { 1302 mesh_model->appkey_indices[i] = MESH_APPKEY_INVALID; 1303 mesh_store_appkey_list(mesh_model); 1304 } 1305 } 1306 } 1307 1308 int mesh_model_contains_appkey(mesh_model_t * mesh_model, uint16_t appkey_index){ 1309 uint16_t i; 1310 for (i=0;i<MAX_NR_MESH_APPKEYS_PER_MODEL;i++){ 1311 if (mesh_model->appkey_indices[i] == appkey_index) return 1; 1312 } 1313 return 0; 1314 1315 } 1316 1317 // Mesh IV Index 1318 static uint32_t mesh_tag_for_iv_index_and_seq_number(void){ 1319 return ((uint32_t) 'M' << 24) | ((uint32_t) 'F' << 16) | ((uint32_t) 'I' << 9) | ((uint32_t) 'S'); 1320 } 1321 1322 typedef struct { 1323 uint32_t iv_index; 1324 uint32_t seq_number; 1325 } iv_index_and_sequence_number_t; 1326 1327 static uint32_t sequence_number_last_stored; 1328 static uint32_t sequence_number_storage_trigger; 1329 1330 void mesh_store_iv_index_after_provisioning(uint32_t iv_index){ 1331 iv_index_and_sequence_number_t data; 1332 mesh_access_setup_tlv(); 1333 uint32_t tag = mesh_tag_for_iv_index_and_seq_number(); 1334 data.iv_index = iv_index; 1335 data.seq_number = 0; 1336 btstack_tlv_singleton_impl->store_tag(btstack_tlv_singleton_context, tag, (uint8_t *) &data, sizeof(data)); 1337 1338 sequence_number_last_stored = data.seq_number; 1339 sequence_number_storage_trigger = sequence_number_last_stored + MESH_SEQUENCE_NUMBER_STORAGE_INTERVAL; 1340 } 1341 1342 void mesh_store_iv_index_and_sequence_number(void){ 1343 iv_index_and_sequence_number_t data; 1344 mesh_access_setup_tlv(); 1345 uint32_t tag = mesh_tag_for_iv_index_and_seq_number(); 1346 data.iv_index = mesh_get_iv_index(); 1347 data.seq_number = mesh_sequence_number_peek(); 1348 btstack_tlv_singleton_impl->store_tag(btstack_tlv_singleton_context, tag, (uint8_t *) &data, sizeof(data)); 1349 1350 sequence_number_last_stored = data.seq_number; 1351 sequence_number_storage_trigger = sequence_number_last_stored + MESH_SEQUENCE_NUMBER_STORAGE_INTERVAL; 1352 } 1353 1354 int mesh_load_iv_index_and_sequence_number(uint32_t * iv_index, uint32_t * sequence_number){ 1355 iv_index_and_sequence_number_t data; 1356 mesh_access_setup_tlv(); 1357 uint32_t tag = mesh_tag_for_iv_index_and_seq_number(); 1358 uint32_t len = btstack_tlv_singleton_impl->get_tag(btstack_tlv_singleton_context, tag, (uint8_t *) &data, sizeof(data)); 1359 if (len == sizeof(iv_index_and_sequence_number_t)){ 1360 *iv_index = data.iv_index; 1361 *sequence_number = data.seq_number; 1362 return 1; 1363 } 1364 return 0; 1365 } 1366 1367 // higher layer 1368 static void mesh_persist_iv_index_and_sequence_number(void){ 1369 if (mesh_sequence_number_peek() >= sequence_number_storage_trigger){ 1370 mesh_store_iv_index_and_sequence_number(); 1371 } 1372 } 1373 1374 1375 // Mesh Model Publication 1376 static btstack_timer_source_t mesh_access_publication_timer; 1377 1378 static uint32_t mesh_model_publication_retransmit_count(uint8_t retransmit){ 1379 return retransmit & 0x07u; 1380 } 1381 1382 static uint32_t mesh_model_publication_retransmission_period_ms(uint8_t retransmit){ 1383 return ((uint32_t)((retransmit >> 3) + 1)) * 50; 1384 } 1385 1386 static void mesh_model_publication_setup_publication(mesh_publication_model_t * publication_model, uint32_t now){ 1387 1388 // set retransmit counter 1389 publication_model->retransmit_count = mesh_model_publication_retransmit_count(publication_model->retransmit); 1390 1391 // schedule next publication or retransmission 1392 uint32_t publication_period_ms = mesh_access_transitions_step_ms_from_gdtt(publication_model->period); 1393 1394 // set next publication 1395 if (publication_period_ms != 0){ 1396 publication_model->next_publication_ms = now + publication_period_ms; 1397 publication_model->state = MESH_MODEL_PUBLICATION_STATE_W4_PUBLICATION_MS; 1398 } 1399 } 1400 1401 static void mesh_model_publication_setup_retransmission(mesh_publication_model_t * publication_model, uint32_t now){ 1402 uint8_t num_retransmits = mesh_model_publication_retransmit_count(publication_model->retransmit); 1403 if (num_retransmits == 0) return; 1404 1405 // calc next retransmit time 1406 uint32_t retransmission_ms = now + mesh_model_publication_retransmission_period_ms(publication_model->retransmit); 1407 1408 // ignore if retransmission would be after next publication timeout 1409 if (publication_model->state == MESH_MODEL_PUBLICATION_STATE_W4_PUBLICATION_MS){ 1410 if (btstack_time_delta(retransmission_ms, publication_model->next_publication_ms) > 0) return; 1411 } 1412 1413 // schedule next retransmission 1414 publication_model->next_retransmit_ms = retransmission_ms; 1415 publication_model->state = MESH_MODEL_PUBLICATION_STATE_W4_RETRANSMIT_MS; 1416 } 1417 1418 static void mesh_model_publication_publish_now_model(mesh_model_t * mesh_model){ 1419 mesh_publication_model_t * publication_model = mesh_model->publication_model; 1420 if (publication_model == NULL) return; 1421 if (publication_model->publish_state_fn == NULL) return; 1422 uint16_t dest = publication_model->address; 1423 if (dest == MESH_ADDRESS_UNSASSIGNED) return; 1424 uint16_t appkey_index = publication_model->appkey_index; 1425 mesh_transport_key_t * app_key = mesh_transport_key_get(appkey_index); 1426 if (app_key == NULL) return; 1427 1428 // compose message 1429 mesh_pdu_t * pdu = (*publication_model->publish_state_fn)(mesh_model); 1430 if (pdu == NULL) return; 1431 1432 mesh_upper_transport_setup_access_pdu_header(pdu, app_key->netkey_index, appkey_index, publication_model->ttl, mesh_access_get_element_address(mesh_model), dest, 0); 1433 mesh_upper_transport_send_access_pdu(pdu); 1434 } 1435 1436 static void mesh_model_publication_run(btstack_timer_source_t * ts){ 1437 UNUSED(ts); 1438 1439 uint32_t now = btstack_run_loop_get_time_ms(); 1440 1441 // iterate over elements and models and handle time-based transitions 1442 mesh_element_iterator_t element_it; 1443 mesh_element_iterator_init(&element_it); 1444 while (mesh_element_iterator_has_next(&element_it)){ 1445 mesh_element_t * element = mesh_element_iterator_next(&element_it); 1446 mesh_model_iterator_t model_it; 1447 mesh_model_iterator_init(&model_it, element); 1448 while (mesh_model_iterator_has_next(&model_it)){ 1449 mesh_model_t * mesh_model = mesh_model_iterator_next(&model_it); 1450 mesh_publication_model_t * publication_model = mesh_model->publication_model; 1451 if (publication_model == NULL) continue; 1452 1453 // schedule next 1454 switch (publication_model->state){ 1455 case MESH_MODEL_PUBLICATION_STATE_W4_PUBLICATION_MS: 1456 if (btstack_time_delta(publication_model->next_publication_ms, now) > 0) break; 1457 // timeout 1458 publication_model->publish_now = 1; 1459 // schedule next publication and retransmission 1460 mesh_model_publication_setup_publication(publication_model, now); 1461 mesh_model_publication_setup_retransmission(publication_model, now); 1462 break; 1463 case MESH_MODEL_PUBLICATION_STATE_W4_RETRANSMIT_MS: 1464 if (btstack_time_delta(publication_model->next_retransmit_ms, now) > 0) break; 1465 // timeout 1466 publication_model->publish_now = 1; 1467 publication_model->retransmit_count--; 1468 // schedule next retransmission 1469 mesh_model_publication_setup_retransmission(publication_model, now); 1470 break; 1471 default: 1472 break; 1473 } 1474 1475 if (publication_model->publish_now == 0) continue; 1476 1477 publication_model->publish_now = 0; 1478 mesh_model_publication_publish_now_model(mesh_model); 1479 } 1480 } 1481 1482 int32_t next_timeout_ms = 0; 1483 mesh_element_iterator_init(&element_it); 1484 while (mesh_element_iterator_has_next(&element_it)){ 1485 mesh_element_t * element = mesh_element_iterator_next(&element_it); 1486 mesh_model_iterator_t model_it; 1487 mesh_model_iterator_init(&model_it, element); 1488 while (mesh_model_iterator_has_next(&model_it)){ 1489 mesh_model_t * mesh_model = mesh_model_iterator_next(&model_it); 1490 mesh_publication_model_t * publication_model = mesh_model->publication_model; 1491 if (publication_model == NULL) continue; 1492 1493 // schedule next 1494 int32_t timeout_delta_ms; 1495 switch (publication_model->state){ 1496 case MESH_MODEL_PUBLICATION_STATE_W4_PUBLICATION_MS: 1497 timeout_delta_ms = btstack_time_delta(publication_model->next_publication_ms, now); 1498 if (next_timeout_ms == 0 || timeout_delta_ms < next_timeout_ms){ 1499 next_timeout_ms = timeout_delta_ms; 1500 } 1501 break; 1502 case MESH_MODEL_PUBLICATION_STATE_W4_RETRANSMIT_MS: 1503 timeout_delta_ms = btstack_time_delta(publication_model->next_retransmit_ms, now); 1504 if (next_timeout_ms == 0 || timeout_delta_ms < next_timeout_ms){ 1505 next_timeout_ms = timeout_delta_ms; 1506 } 1507 break; 1508 default: 1509 break; 1510 } 1511 } 1512 } 1513 1514 // set timer 1515 if (next_timeout_ms == 0) return; 1516 1517 btstack_run_loop_set_timer(&mesh_access_publication_timer, next_timeout_ms); 1518 btstack_run_loop_set_timer_handler(&mesh_access_publication_timer, mesh_model_publication_run); 1519 btstack_run_loop_add_timer(&mesh_access_publication_timer); 1520 } 1521 1522 void mesh_model_publication_start(mesh_model_t * mesh_model){ 1523 mesh_publication_model_t * publication_model = mesh_model->publication_model; 1524 if (publication_model == NULL) return; 1525 1526 // reset state 1527 publication_model->state = MESH_MODEL_PUBLICATION_STATE_IDLE; 1528 1529 // publish right away 1530 publication_model->publish_now = 1; 1531 1532 // setup next publication and retransmission 1533 uint32_t now = btstack_run_loop_get_time_ms(); 1534 mesh_model_publication_setup_publication(publication_model, now); 1535 mesh_model_publication_setup_retransmission(publication_model, now); 1536 1537 mesh_model_publication_run(NULL); 1538 } 1539 1540 void mesh_model_publication_stop(mesh_model_t * mesh_model){ 1541 mesh_publication_model_t * publication_model = mesh_model->publication_model; 1542 if (publication_model == NULL) return; 1543 1544 // reset state 1545 publication_model->state = MESH_MODEL_PUBLICATION_STATE_IDLE; 1546 } 1547 1548 void mesh_access_state_changed(mesh_model_t * mesh_model){ 1549 mesh_publication_model_t * publication_model = mesh_model->publication_model; 1550 if (publication_model == NULL) return; 1551 publication_model->publish_now = 1; 1552 mesh_model_publication_run(NULL); 1553 } 1554 1555 void mesh_access_netkey_finalize(mesh_network_key_t * network_key){ 1556 mesh_network_key_remove(network_key); 1557 mesh_delete_network_key(network_key->internal_index); 1558 btstack_memory_mesh_network_key_free(network_key); 1559 } 1560 1561 void mesh_access_appkey_finalize(mesh_transport_key_t * transport_key){ 1562 mesh_transport_key_remove(transport_key); 1563 mesh_delete_app_key(transport_key->appkey_index); 1564 btstack_memory_mesh_transport_key_free(transport_key); 1565 } 1566 1567 void mesh_access_key_refresh_revoke_keys(mesh_subnet_t * subnet){ 1568 // delete old netkey index 1569 mesh_access_netkey_finalize(subnet->old_key); 1570 subnet->old_key = subnet->new_key; 1571 subnet->new_key = NULL; 1572 1573 // delete old appkeys, if any 1574 mesh_transport_key_iterator_t it; 1575 mesh_transport_key_iterator_init(&it, subnet->netkey_index); 1576 while (mesh_transport_key_iterator_has_more(&it)){ 1577 mesh_transport_key_t * transport_key = mesh_transport_key_iterator_get_next(&it); 1578 if (transport_key->old_key == 0) continue; 1579 mesh_access_appkey_finalize(transport_key); 1580 } 1581 } 1582 1583 static void mesh_access_secure_network_beacon_handler(uint8_t packet_type, uint16_t channel, uint8_t * packet, uint16_t size){ 1584 UNUSED(channel); 1585 UNUSED(size); 1586 1587 if (packet_type != MESH_BEACON_PACKET) return; 1588 1589 // lookup subnet and netkey by network id 1590 uint8_t * beacon_network_id = &packet[2]; 1591 mesh_subnet_iterator_t it; 1592 mesh_subnet_iterator_init(&it); 1593 mesh_subnet_t * subnet = NULL; 1594 uint8_t new_key = 0; 1595 while (mesh_subnet_iterator_has_more(&it)){ 1596 mesh_subnet_t * item = mesh_subnet_iterator_get_next(&it); 1597 if (memcmp(item->old_key->network_id, beacon_network_id, 8) == 0 ) { 1598 subnet = item; 1599 } 1600 if (item->new_key != NULL && memcmp(item->new_key->network_id, beacon_network_id, 8) == 0 ) { 1601 subnet = item; 1602 new_key = 1; 1603 } 1604 break; 1605 } 1606 if (subnet == NULL) return; 1607 1608 uint8_t flags = packet[1]; 1609 1610 // Key refresh via secure network beacons that are authenticated with new netkey 1611 if (new_key){ 1612 // either first or second phase (in phase 0, new key is not set) 1613 int key_refresh_flag = flags & 1; 1614 if (key_refresh_flag){ 1615 // transition to phase 3 from either phase 1 or 2 1616 switch (subnet->key_refresh){ 1617 case MESH_KEY_REFRESH_FIRST_PHASE: 1618 case MESH_KEY_REFRESH_SECOND_PHASE: 1619 mesh_access_key_refresh_revoke_keys(subnet); 1620 subnet->key_refresh = MESH_KEY_REFRESH_NOT_ACTIVE; 1621 break; 1622 default: 1623 break; 1624 } 1625 } else { 1626 // transition to phase 2 from either phase 1 1627 switch (subnet->key_refresh){ 1628 case MESH_KEY_REFRESH_FIRST_PHASE: 1629 // -- update state 1630 subnet->key_refresh = MESH_KEY_REFRESH_SECOND_PHASE; 1631 break; 1632 default: 1633 break; 1634 } 1635 } 1636 } 1637 1638 // IV Update 1639 1640 int beacon_iv_update_active = flags & 2; 1641 int local_iv_update_active = mesh_iv_update_active(); 1642 uint32_t beacon_iv_index = big_endian_read_32(packet, 10); 1643 uint32_t local_iv_index = mesh_get_iv_index(); 1644 1645 int32_t iv_index_delta = (int32_t)(beacon_iv_index - local_iv_index); 1646 1647 // "If a node in Normal Operation receives a Secure Network beacon with an IV index less than the last known IV Index or greater than 1648 // the last known IV Index + 42, the Secure Network beacon shall be ignored." 1649 if (iv_index_delta < 0 || iv_index_delta > 42){ 1650 return; 1651 } 1652 1653 // "If a node in Normal Operation receives a Secure Network beacon with an IV index equal to the last known IV index+1 and 1654 // the IV Update Flag set to 0, the node may update its IV without going to the IV Update in Progress state, or it may initiate 1655 // an IV Index Recovery procedure (Section 3.10.6), or it may ignore the Secure Network beacon. The node makes the choice depending 1656 // on the time since last IV update and the likelihood that the node has missed the Secure Network beacons with the IV update Flag set to 1."" 1657 if (local_iv_update_active == 0 && beacon_iv_update_active == 0 && iv_index_delta == 1){ 1658 // instant iv update 1659 mesh_set_iv_index( beacon_iv_index ); 1660 // store updated iv index 1661 mesh_store_iv_index_and_sequence_number(); 1662 return; 1663 } 1664 1665 // "If this node is a member of a primary subnet and receives a Secure Network beacon on a secondary subnet with an IV Index greater than 1666 // the last known IV Index of the primary subnet, the Secure Network beacon shall be ignored." 1667 int member_of_primary_subnet = mesh_subnet_get_by_netkey_index(0) != NULL; 1668 int beacon_on_secondary_subnet = subnet->netkey_index != 0; 1669 if (member_of_primary_subnet && beacon_on_secondary_subnet && iv_index_delta > 0){ 1670 return; 1671 } 1672 1673 // "If a node in Normal Operation receives a Secure Network beacon with an IV index greater than the last known IV Index + 1..." 1674 // "... it may initiate an IV Index Recovery procedure, see Section 3.10.6." 1675 if (local_iv_update_active == 0 && iv_index_delta > 1){ 1676 // "Upon receiving and successfully authenticating a Secure Network beacon for a primary subnet... " 1677 int beacon_on_primary_subnet = subnet->netkey_index == 0; 1678 if (!beacon_on_primary_subnet) return; 1679 // "... whose IV Index is 1 or more higher than the current known IV Index, the node shall " 1680 // " set its current IV Index and its current IV Update procedure state from the values in this Secure Network beacon." 1681 mesh_iv_index_recovered(beacon_iv_update_active, beacon_iv_index); 1682 // store updated iv index if in normal mode 1683 if (beacon_iv_update_active == 0){ 1684 mesh_store_iv_index_and_sequence_number(); 1685 } 1686 return; 1687 } 1688 1689 if (local_iv_update_active == 0){ 1690 if (beacon_iv_update_active){ 1691 mesh_trigger_iv_update(); 1692 } 1693 } else { 1694 if (beacon_iv_update_active == 0){ 1695 // " At the point of transition, the node shall reset the sequence number to 0x000000." 1696 mesh_sequence_number_set(0); 1697 mesh_iv_update_completed(); 1698 // store updated iv index 1699 mesh_store_iv_index_and_sequence_number(); 1700 } 1701 } 1702 } 1703