1 /* 2 * Copyright (C) 2018 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_network.c" 39 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 44 #include "btstack_debug.h" 45 #include "btstack_event.h" 46 #include "btstack_memory.h" 47 #include "btstack_util.h" 48 49 #include "mesh/beacon.h" 50 #include "mesh/mesh_foundation.h" 51 #include "mesh/mesh_iv_index_seq_number.h" 52 #include "mesh/mesh_keys.h" 53 #include "mesh/mesh_node.h" 54 #include "mesh/provisioning.h" 55 #include "mesh/provisioning_device.h" 56 57 #ifdef ENABLE_MESH_ADV_BEARER 58 #include "mesh/adv_bearer.h" 59 #endif 60 61 #ifdef ENABLE_MESH_GATT_BEARER 62 #include "mesh/gatt_bearer.h" 63 #endif 64 65 // configuration 66 #define MESH_NETWORK_CACHE_SIZE 2 67 68 // debug config 69 // #define LOG_NETWORK 70 71 static void mesh_network_dump_network_pdus(const char * name, btstack_linked_list_t * list); 72 73 // structs 74 75 // globals 76 77 static void (*mesh_network_higher_layer_handler)(mesh_network_callback_type_t callback_type, mesh_network_pdu_t * network_pdu); 78 static void (*mesh_network_proxy_message_handler)(mesh_network_callback_type_t callback_type, mesh_network_pdu_t * network_pdu); 79 80 #ifdef ENABLE_MESH_GATT_BEARER 81 static hci_con_handle_t gatt_bearer_con_handle; 82 #endif 83 84 // shared send/receive crypto 85 static int mesh_crypto_active; 86 87 // crypto requests 88 static union { 89 btstack_crypto_ccm_t ccm; 90 btstack_crypto_aes128_t aes128; 91 } mesh_network_crypto_request; 92 93 static const mesh_network_key_t * current_network_key; 94 95 // PECB calculation 96 static uint8_t encryption_block[16]; 97 static uint8_t obfuscation_block[16]; 98 99 // Subnets 100 static btstack_linked_list_t subnets; 101 102 // Network Nonce 103 static uint8_t network_nonce[13]; 104 105 // INCOMING // 106 107 // unprocessed network pdu - added by mesh_network_pdus_received_message 108 static btstack_linked_list_t network_pdus_received; 109 110 // in validation 111 static mesh_network_pdu_t * incoming_pdu_raw; 112 static mesh_network_pdu_t * incoming_pdu_decoded; 113 static mesh_network_key_iterator_t validation_network_key_it; 114 115 // OUTGOING // 116 117 // Network PDUs queued by mesh_network_send 118 static btstack_linked_list_t network_pdus_queued; 119 120 // Network PDU about to get send via all bearers when encrypted 121 static mesh_network_pdu_t * outgoing_pdu; 122 123 // Network PDUs ready to send via GATT Bearer 124 static btstack_linked_list_t network_pdus_outgoing_gatt; 125 126 #ifdef ENABLE_MESH_GATT_BEARER 127 static mesh_network_pdu_t * gatt_bearer_network_pdu; 128 #endif 129 130 // Network PDUs ready to send via ADV Bearer 131 static btstack_linked_list_t network_pdus_outgoing_adv; 132 133 #ifdef ENABLE_MESH_ADV_BEARER 134 static mesh_network_pdu_t * adv_bearer_network_pdu; 135 #endif 136 137 138 // mesh network cache - we use 32-bit 'hashes' 139 static uint32_t mesh_network_cache[MESH_NETWORK_CACHE_SIZE]; 140 static int mesh_network_cache_index; 141 142 // prototypes 143 144 static void mesh_network_run(void); 145 static void process_network_pdu_validate(void); 146 147 // network caching 148 static uint32_t mesh_network_cache_hash(mesh_network_pdu_t * network_pdu){ 149 // - The SEQ field is a 24-bit integer that when combined with the IV Index, 150 // shall be a unique value for each new Network PDU originated by this node (=> SRC) 151 // - IV updates only rarely 152 // => 16 bit SRC, 1 bit IVI, 15 bit SEQ 153 uint8_t ivi = network_pdu->data[0] >> 7; 154 uint16_t seq = big_endian_read_16(network_pdu->data, 3); 155 uint16_t src = big_endian_read_16(network_pdu->data, 5); 156 return (src << 16) | (ivi << 15) | (seq & 0x7fff); 157 } 158 159 static int mesh_network_cache_find(uint32_t hash){ 160 int i; 161 for (i = 0; i < MESH_NETWORK_CACHE_SIZE; i++) { 162 if (mesh_network_cache[i] == hash) { 163 return 1; 164 } 165 } 166 return 0; 167 } 168 169 static void mesh_network_cache_add(uint32_t hash){ 170 mesh_network_cache[mesh_network_cache_index++] = hash; 171 if (mesh_network_cache_index >= MESH_NETWORK_CACHE_SIZE){ 172 mesh_network_cache_index = 0; 173 } 174 } 175 176 // common helper 177 int mesh_network_address_unicast(uint16_t addr){ 178 return addr != MESH_ADDRESS_UNSASSIGNED && (addr < 0x8000); 179 } 180 181 int mesh_network_address_virtual(uint16_t addr){ 182 return (addr & 0xC000) == 0x8000; // 0b10xx xxxx xxxx xxxx 183 } 184 185 int mesh_network_address_group(uint16_t addr){ 186 return (addr & 0xC000) == 0xC000; // 0b11xx xxxx xxxx xxxx 187 } 188 189 int mesh_network_address_all_proxies(uint16_t addr){ 190 return addr == MESH_ADDRESS_ALL_PROXIES; 191 } 192 193 int mesh_network_address_all_nodes(uint16_t addr){ 194 return addr == MESH_ADDRESS_ALL_NODES; 195 } 196 197 int mesh_network_address_all_friends(uint16_t addr){ 198 return addr == MESH_ADDRESS_ALL_FRIENDS; 199 } 200 201 int mesh_network_address_all_relays(uint16_t addr){ 202 return addr == MESH_ADDRESS_ALL_RELAYS; 203 } 204 205 int mesh_network_addresses_valid(uint8_t ctl, uint16_t src, uint16_t dst){ 206 // printf("CTL: %u\n", ctl); 207 // printf("SRC: %04x\n", src); 208 // printf("DST: %04x\n", dst); 209 if (src == 0){ 210 // printf("SRC Unassigned Addr -> ignore\n"); 211 return 0; 212 } 213 if ((src & 0xC000) == 0x8000){ 214 // printf("SRC Virtual Addr -> ignore\n"); 215 return 0; 216 } 217 if ((src & 0xC000) == 0xC000){ 218 // printf("SRC Group Addr -> ignore\n"); 219 return 0; 220 } 221 if (dst == 0){ 222 // printf("DST Unassigned Addr -> ignore\n"); 223 return 0; 224 } 225 if ( ((dst & 0xC000) == 0x8000) && (ctl == 1)){ 226 // printf("DST Virtual Addr in CONTROL -> ignore\n"); 227 return 0; 228 } 229 if ( (0xFF00 <= dst) && (dst <= 0xfffb) && (ctl == 0) ){ 230 // printf("DST RFU Group Addr in MESSAGE -> ignore\n"); 231 return 0; 232 } 233 // printf("SRC + DST Addr valid\n"); 234 return 1; 235 } 236 237 static void mesh_network_create_nonce(uint8_t * nonce, const mesh_network_pdu_t * pdu, uint32_t iv_index){ 238 unsigned int pos = 0; 239 nonce[pos++] = 0x0; // Network Nonce 240 memcpy(&nonce[pos], &pdu->data[1], 6); 241 pos += 6; 242 big_endian_store_16(nonce, pos, 0); 243 pos += 2; 244 big_endian_store_32(nonce, pos, iv_index); 245 } 246 247 static void mesh_proxy_create_nonce(uint8_t * nonce, const mesh_network_pdu_t * pdu, uint32_t iv_index){ 248 unsigned int pos = 0; 249 nonce[pos++] = 0x3; // Proxy Nonce 250 nonce[pos++] = 0; 251 memcpy(&nonce[pos], &pdu->data[2], 5); 252 pos += 5; 253 big_endian_store_16(nonce, pos, 0); 254 pos += 2; 255 big_endian_store_32(nonce, pos, iv_index); 256 } 257 258 // NID/IVI | obfuscated (CTL/TTL, SEQ (24), SRC (16) ), encrypted ( DST(16), TransportPDU), MIC(32 or 64) 259 260 static void mesh_network_send_complete(mesh_network_pdu_t * network_pdu){ 261 if (network_pdu->flags & MESH_NETWORK_PDU_FLAGS_RELAY){ 262 #ifdef LOG_NETWORK 263 printf("TX-F-NetworkPDU (%p): relay -> free packet\n", network_pdu); 264 #endif 265 mesh_network_pdu_free(network_pdu); 266 } else { 267 #ifdef LOG_NETWORK 268 printf("TX-F-NetworkPDU (%p): notify lower transport\n", network_pdu); 269 #endif 270 // notify higher layer 271 (*mesh_network_higher_layer_handler)(MESH_NETWORK_PDU_SENT, network_pdu); 272 } 273 } 274 275 static void mesh_network_send_d(mesh_network_pdu_t * network_pdu){ 276 277 #ifdef LOG_NETWORK 278 printf("TX-D-NetworkPDU (%p): ", network_pdu); 279 printf_hexdump(network_pdu->data, network_pdu->len); 280 #endif 281 282 // add to queue 283 btstack_linked_list_add_tail(&network_pdus_outgoing_gatt, (btstack_linked_item_t *) network_pdu); 284 285 // go 286 mesh_network_run(); 287 } 288 289 // new 290 static void mesh_network_send_c(void *arg){ 291 UNUSED(arg); 292 293 // obfuscate 294 unsigned int i; 295 for (i=0;i<6;i++){ 296 outgoing_pdu->data[1+i] ^= obfuscation_block[i]; 297 } 298 299 #ifdef LOG_NETWORK 300 printf("TX-C-NetworkPDU (%p): ", outgoing_pdu); 301 printf_hexdump(outgoing_pdu->data, outgoing_pdu->len); 302 #endif 303 304 // crypto done 305 mesh_crypto_active = 0; 306 307 // done 308 mesh_network_pdu_t * network_pdu = outgoing_pdu; 309 outgoing_pdu = NULL; 310 (network_pdu->callback)(network_pdu); 311 } 312 313 static void mesh_network_send_b(void *arg){ 314 UNUSED(arg); 315 316 uint32_t iv_index = mesh_get_iv_index_for_tx(); 317 318 // store NetMIC 319 uint8_t net_mic[8]; 320 btstack_crypto_ccm_get_authentication_value(&mesh_network_crypto_request.ccm, net_mic); 321 322 // store MIC 323 uint8_t net_mic_len = outgoing_pdu->data[1] & 0x80 ? 8 : 4; 324 memcpy(&outgoing_pdu->data[outgoing_pdu->len], net_mic, net_mic_len); 325 outgoing_pdu->len += net_mic_len; 326 327 btstack_assert(outgoing_pdu->len <= 29); 328 329 #ifdef LOG_NETWORK 330 printf("TX-B-NetworkPDU (%p): ", outgoing_pdu); 331 printf_hexdump(outgoing_pdu->data, outgoing_pdu->len); 332 #endif 333 334 // calc PECB 335 memset(encryption_block, 0, 5); 336 big_endian_store_32(encryption_block, 5, iv_index); 337 memcpy(&encryption_block[9], &outgoing_pdu->data[7], 7); 338 btstack_crypto_aes128_encrypt(&mesh_network_crypto_request.aes128, current_network_key->privacy_key, encryption_block, obfuscation_block, &mesh_network_send_c, NULL); 339 } 340 341 static void mesh_network_send_a(void){ 342 343 mesh_crypto_active = 1; 344 345 uint32_t iv_index = mesh_get_iv_index_for_tx(); 346 347 // lookup subnet by netkey_index 348 mesh_subnet_t * subnet = mesh_subnet_get_by_netkey_index(outgoing_pdu->netkey_index); 349 if (!subnet) { 350 mesh_crypto_active = 0; 351 mesh_network_pdu_t * network_pdu = outgoing_pdu; 352 outgoing_pdu = NULL; 353 // notify upper layer 354 mesh_network_send_complete(network_pdu); 355 // run again 356 mesh_network_run(); 357 return; 358 } 359 360 // get network key to use for sending 361 current_network_key = mesh_subnet_get_outgoing_network_key(subnet); 362 363 #ifdef LOG_NETWORK 364 printf("TX-A-NetworkPDU (%p): ", outgoing_pdu); 365 printf_hexdump(outgoing_pdu->data, outgoing_pdu->len); 366 #endif 367 368 // get network nonce 369 if (outgoing_pdu->flags & MESH_NETWORK_PDU_FLAGS_PROXY_CONFIGURATION){ 370 mesh_proxy_create_nonce(network_nonce, outgoing_pdu, iv_index); 371 #ifdef LOG_NETWORK 372 printf("TX-ProxyNonce: "); 373 printf_hexdump(network_nonce, 13); 374 #endif 375 } else { 376 mesh_network_create_nonce(network_nonce, outgoing_pdu, iv_index); 377 #ifdef LOG_NETWORK 378 printf("TX-NetworkNonce: "); 379 printf_hexdump(network_nonce, 13); 380 #endif 381 } 382 383 #ifdef LOG_NETWORK 384 printf("TX-EncryptionKey: "); 385 printf_hexdump(current_network_key->encryption_key, 16); 386 #endif 387 388 // start ccm 389 uint8_t cypher_len = outgoing_pdu->len - 7; 390 uint8_t net_mic_len = outgoing_pdu->data[1] & 0x80 ? 8 : 4; 391 btstack_crypto_ccm_init(&mesh_network_crypto_request.ccm, current_network_key->encryption_key, network_nonce, cypher_len, 0, net_mic_len); 392 btstack_crypto_ccm_encrypt_block(&mesh_network_crypto_request.ccm, cypher_len, &outgoing_pdu->data[7], &outgoing_pdu->data[7], &mesh_network_send_b, NULL); 393 } 394 395 #if defined(ENABLE_MESH_RELAY) || defined (ENABLE_MESH_PROXY_SERVER) 396 static void mesh_network_relay_message(mesh_network_pdu_t * network_pdu){ 397 398 uint8_t ctl_ttl = network_pdu->data[1]; 399 uint8_t ctl = ctl_ttl & 0x80; 400 uint8_t ttl = ctl_ttl & 0x7f; 401 402 #ifdef LOG_NETWORK 403 printf("TX-Relay-NetworkPDU (%p): ", network_pdu); 404 printf_hexdump(network_pdu->data, network_pdu->len); 405 printf("^^ into network_pdus_queued\n"); 406 #endif 407 408 // prepare pdu for resending 409 network_pdu->data[1] = (ctl << 7) | (ttl - 1); 410 network_pdu->flags |= MESH_NETWORK_PDU_FLAGS_RELAY; 411 412 // queue up 413 network_pdu->callback = &mesh_network_send_d; 414 btstack_linked_list_add_tail(&network_pdus_queued, (btstack_linked_item_t *) network_pdu); 415 } 416 #endif 417 418 void mesh_network_message_processed_by_higher_layer(mesh_network_pdu_t * network_pdu){ 419 420 #if defined(ENABLE_MESH_RELAY) || defined (ENABLE_MESH_PROXY_SERVER) 421 422 // check if address does not matches elements on our node and TTL >= 2 423 uint16_t src = mesh_network_src(network_pdu); 424 uint8_t ttl = mesh_network_ttl(network_pdu); 425 426 uint16_t mesh_network_primary_address = mesh_node_get_primary_element_address(); 427 428 if (((src < mesh_network_primary_address) || (src > (mesh_network_primary_address + mesh_node_element_count()))) && (ttl >= 2)){ 429 430 if ((network_pdu->flags & MESH_NETWORK_PDU_FLAGS_GATT_BEARER) == 0){ 431 432 // message received via ADV bearer are relayed: 433 434 #ifdef ENABLE_MESH_RELAY 435 if (mesh_foundation_relay_get() != 0){ 436 // - to ADV bearer, if Relay supported and enabled 437 mesh_network_relay_message(network_pdu); 438 mesh_network_run(); 439 return; 440 } 441 #endif 442 443 #ifdef ENABLE_MESH_PROXY_SERVER 444 if (mesh_foundation_gatt_proxy_get() != 0){ 445 // - to GATT bearer, if Proxy supported and enabled 446 mesh_network_relay_message(network_pdu); 447 mesh_network_run(); 448 return; 449 } 450 #endif 451 452 } else { 453 454 // messages received via GATT bearer are relayed: 455 456 #ifdef ENABLE_MESH_PROXY_SERVER 457 if (mesh_foundation_gatt_proxy_get() != 0){ 458 // - to ADV bearer, if Proxy supported and enabled 459 mesh_network_relay_message(network_pdu); 460 mesh_network_run(); 461 return; 462 } 463 #endif 464 465 } 466 } 467 #endif 468 469 // otherwise, we're done 470 btstack_memory_mesh_network_pdu_free(network_pdu); 471 } 472 473 static void process_network_pdu_done(void){ 474 btstack_memory_mesh_network_pdu_free(incoming_pdu_raw); 475 incoming_pdu_raw = NULL; 476 mesh_crypto_active = 0; 477 478 mesh_network_run(); 479 } 480 481 static void process_network_pdu_validate_d(void * arg){ 482 UNUSED(arg); 483 // mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) arg; 484 485 uint8_t ctl_ttl = incoming_pdu_decoded->data[1]; 486 uint8_t ctl = ctl_ttl >> 7; 487 uint8_t net_mic_len = (ctl_ttl & 0x80) ? 8 : 4; 488 489 // store NetMIC 490 uint8_t net_mic[8]; 491 btstack_crypto_ccm_get_authentication_value(&mesh_network_crypto_request.ccm, net_mic); 492 #ifdef LOG_NETWORK 493 printf("RX-NetMIC (%p): ", incoming_pdu_decoded); 494 printf_hexdump(net_mic, net_mic_len); 495 #endif 496 // store in decoded pdu 497 memcpy(&incoming_pdu_decoded->data[incoming_pdu_decoded->len-net_mic_len], net_mic, net_mic_len); 498 499 #ifdef LOG_NETWORK 500 uint8_t cypher_len = incoming_pdu_decoded->len - 9 - net_mic_len; 501 printf("RX-Decrypted DST/TransportPDU (%p): ", incoming_pdu_decoded); 502 printf_hexdump(&incoming_pdu_decoded->data[7], 2 + cypher_len); 503 504 printf("RX-Decrypted: "); 505 printf_hexdump(incoming_pdu_decoded->data, incoming_pdu_decoded->len); 506 #endif 507 508 // validate network mic 509 if (memcmp(net_mic, &incoming_pdu_raw->data[incoming_pdu_decoded->len-net_mic_len], net_mic_len) != 0){ 510 // fail 511 printf("RX-NetMIC mismatch, try next key (%p)\n", incoming_pdu_decoded); 512 process_network_pdu_validate(); 513 return; 514 } 515 516 // remove NetMIC from payload 517 incoming_pdu_decoded->len -= net_mic_len; 518 519 #ifdef LOG_NETWORK 520 // match 521 printf("RX-NetMIC matches (%p)\n", incoming_pdu_decoded); 522 printf("RX-TTL (%p): 0x%02x\n", incoming_pdu_decoded, incoming_pdu_decoded->data[1] & 0x7f); 523 #endif 524 525 // set netkey_index 526 incoming_pdu_decoded->netkey_index = current_network_key->netkey_index; 527 528 if (incoming_pdu_decoded->flags & MESH_NETWORK_PDU_FLAGS_PROXY_CONFIGURATION){ 529 530 mesh_network_pdu_t * decoded_pdu = incoming_pdu_decoded; 531 incoming_pdu_decoded = NULL; 532 533 // no additional checks for proxy messages 534 (*mesh_network_proxy_message_handler)(MESH_NETWORK_PDU_RECEIVED, decoded_pdu); 535 536 } else { 537 538 // validate src/dest addresses 539 uint16_t src = big_endian_read_16(incoming_pdu_decoded->data, 5); 540 uint16_t dst = big_endian_read_16(incoming_pdu_decoded->data, 7); 541 int valid = mesh_network_addresses_valid(ctl, src, dst); 542 if (!valid){ 543 #ifdef LOG_NETWORK 544 printf("RX Address invalid (%p)\n", incoming_pdu_decoded); 545 #endif 546 btstack_memory_mesh_network_pdu_free(incoming_pdu_decoded); 547 incoming_pdu_decoded = NULL; 548 process_network_pdu_done(); 549 return; 550 } 551 552 // check cache 553 uint32_t hash = mesh_network_cache_hash(incoming_pdu_decoded); 554 #ifdef LOG_NETWORK 555 printf("RX-Hash (%p): %08x\n", incoming_pdu_decoded, hash); 556 #endif 557 if (mesh_network_cache_find(hash)){ 558 // found in cache, drop 559 #ifdef LOG_NETWORK 560 printf("Found in cache -> drop packet (%p)\n", incoming_pdu_decoded); 561 #endif 562 btstack_memory_mesh_network_pdu_free(incoming_pdu_decoded); 563 incoming_pdu_decoded = NULL; 564 process_network_pdu_done(); 565 return; 566 } 567 568 // store in network cache 569 mesh_network_cache_add(hash); 570 571 #ifdef LOG_NETWORK 572 printf("RX-Validated (%p) - forward to lower transport\n", incoming_pdu_decoded); 573 #endif 574 575 // forward to lower transport layer. message is freed by call to mesh_network_message_processed_by_upper_layer 576 mesh_network_pdu_t * decoded_pdu = incoming_pdu_decoded; 577 incoming_pdu_decoded = NULL; 578 (*mesh_network_higher_layer_handler)(MESH_NETWORK_PDU_RECEIVED, decoded_pdu); 579 } 580 581 // done 582 process_network_pdu_done(); 583 } 584 585 static uint32_t iv_index_for_pdu(const mesh_network_pdu_t * network_pdu){ 586 // get IV Index and IVI 587 uint32_t iv_index = mesh_get_iv_index(); 588 int ivi = network_pdu->data[0] >> 7; 589 590 // if least significant bit differs, use previous IV Index 591 if ((iv_index & 1 ) ^ ivi){ 592 iv_index--; 593 #ifdef LOG_NETWORK 594 printf("RX-IV: IVI indicates previous IV index, using 0x%08x\n", iv_index); 595 #endif 596 } 597 return iv_index; 598 } 599 600 static void process_network_pdu_validate_b(void * arg){ 601 UNUSED(arg); 602 603 #ifdef LOG_NETWORK 604 printf("RX-PECB: "); 605 printf_hexdump(obfuscation_block, 6); 606 #endif 607 608 // de-obfuscate 609 unsigned int i; 610 for (i=0;i<6;i++){ 611 incoming_pdu_decoded->data[1+i] = incoming_pdu_raw->data[1+i] ^ obfuscation_block[i]; 612 } 613 614 uint32_t iv_index = iv_index_for_pdu(incoming_pdu_raw); 615 616 if (incoming_pdu_decoded->flags & MESH_NETWORK_PDU_FLAGS_PROXY_CONFIGURATION){ 617 // create network nonce 618 mesh_proxy_create_nonce(network_nonce, incoming_pdu_decoded, iv_index); 619 #ifdef LOG_NETWORK 620 printf("RX-Proxy Nonce: "); 621 printf_hexdump(network_nonce, 13); 622 #endif 623 } else { 624 // create network nonce 625 mesh_network_create_nonce(network_nonce, incoming_pdu_decoded, iv_index); 626 #ifdef LOG_NETWORK 627 printf("RX-Network Nonce: "); 628 printf_hexdump(network_nonce, 13); 629 #endif 630 } 631 632 // 633 uint8_t ctl_ttl = incoming_pdu_decoded->data[1]; 634 uint8_t net_mic_len = (ctl_ttl & 0x80) ? 8 : 4; 635 uint8_t cypher_len = incoming_pdu_decoded->len - 7 - net_mic_len; 636 637 #ifdef LOG_NETWORK 638 printf("RX-Cyper len %u, mic len %u\n", cypher_len, net_mic_len); 639 640 printf("RX-Encryption Key: "); 641 printf_hexdump(current_network_key->encryption_key, 16); 642 643 #endif 644 645 btstack_crypto_ccm_init(&mesh_network_crypto_request.ccm, current_network_key->encryption_key, network_nonce, cypher_len, 0, net_mic_len); 646 btstack_crypto_ccm_decrypt_block(&mesh_network_crypto_request.ccm, cypher_len, &incoming_pdu_raw->data[7], &incoming_pdu_decoded->data[7], &process_network_pdu_validate_d, incoming_pdu_decoded); 647 } 648 649 static void process_network_pdu_validate(void){ 650 if (!mesh_network_key_nid_iterator_has_more(&validation_network_key_it)){ 651 printf("No valid network key found\n"); 652 btstack_memory_mesh_network_pdu_free(incoming_pdu_decoded); 653 incoming_pdu_decoded = NULL; 654 process_network_pdu_done(); 655 return; 656 } 657 658 current_network_key = mesh_network_key_nid_iterator_get_next(&validation_network_key_it); 659 660 // calc PECB 661 uint32_t iv_index = iv_index_for_pdu(incoming_pdu_raw); 662 memset(encryption_block, 0, 5); 663 big_endian_store_32(encryption_block, 5, iv_index); 664 memcpy(&encryption_block[9], &incoming_pdu_raw->data[7], 7); 665 btstack_crypto_aes128_encrypt(&mesh_network_crypto_request.aes128, current_network_key->privacy_key, encryption_block, obfuscation_block, &process_network_pdu_validate_b, NULL); 666 } 667 668 669 static void process_network_pdu(void){ 670 // 671 uint8_t nid_ivi = incoming_pdu_raw->data[0]; 672 673 // setup pdu object 674 incoming_pdu_decoded->data[0] = nid_ivi; 675 incoming_pdu_decoded->len = incoming_pdu_raw->len; 676 incoming_pdu_decoded->flags = incoming_pdu_raw->flags; 677 678 // init provisioning data iterator 679 uint8_t nid = nid_ivi & 0x7f; 680 // uint8_t iv_index = network_pdu_data[0] >> 7; 681 mesh_network_key_nid_iterator_init(&validation_network_key_it, nid); 682 683 process_network_pdu_validate(); 684 } 685 686 static void mesh_network_run(void){ 687 if (!btstack_linked_list_empty(&network_pdus_outgoing_gatt)){ 688 689 690 #ifdef ENABLE_MESH_GATT_BEARER 691 if (gatt_bearer_network_pdu == NULL){ 692 // move to 'gatt bearer queue' 693 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_outgoing_gatt); 694 695 #ifdef LOG_NETWORK 696 printf("network run 1: pop %p from network_pdus_outgoing_gatt\n", network_pdu); 697 #endif 698 // request to send via gatt if: 699 // proxy active and connected 700 // packet wasn't received via gatt bearer 701 int send_via_gatt = ((mesh_foundation_gatt_proxy_get() != 0) && 702 (gatt_bearer_con_handle != HCI_CON_HANDLE_INVALID) && 703 ((network_pdu->flags & MESH_NETWORK_PDU_FLAGS_GATT_BEARER) == 0)); 704 if (send_via_gatt){ 705 706 #ifdef LOG_NETWORK 707 printf("network run 2: set %p as gatt_bearer_network_pdu\n", network_pdu); 708 #endif 709 gatt_bearer_network_pdu = network_pdu; 710 gatt_bearer_request_can_send_now_for_network_pdu(); 711 712 } else { 713 714 #ifdef LOG_NETWORK 715 printf("network run 3: push %p to network_pdus_outgoing_adv\n", network_pdu); 716 #endif 717 btstack_linked_list_add_tail(&network_pdus_outgoing_adv, (btstack_linked_item_t *) network_pdu); 718 719 #ifdef LOG_NETWORK 720 mesh_network_dump_network_pdus("network_pdus_outgoing_adv (1)", &network_pdus_outgoing_adv); 721 #endif 722 } 723 } 724 #else 725 // directly move to 'outgoing adv bearer queue' 726 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_outgoing_gatt); 727 btstack_linked_list_add_tail(&network_pdus_outgoing_adv, (btstack_linked_item_t *) network_pdu); 728 #endif 729 } 730 731 if (!btstack_linked_list_empty(&network_pdus_outgoing_adv)){ 732 #ifdef ENABLE_MESH_ADV_BEARER 733 if (adv_bearer_network_pdu == NULL){ 734 // move to 'adv bearer queue' 735 #ifdef LOG_NETWORK 736 mesh_network_dump_network_pdus("network_pdus_outgoing_adv (2)", &network_pdus_outgoing_adv); 737 #endif 738 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_outgoing_adv); 739 #ifdef LOG_NETWORK 740 printf("network run 4: pop %p from network_pdus_outgoing_adv\n", network_pdu); 741 mesh_network_dump_network_pdus("network_pdus_outgoing_adv (3)", &network_pdus_outgoing_adv); 742 #endif 743 adv_bearer_network_pdu = network_pdu; 744 adv_bearer_request_can_send_now_for_network_pdu(); 745 } 746 #else 747 // done 748 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_outgoing_adv); 749 // directly notify upper layer 750 mesh_network_send_complete(network_pdu); 751 #endif 752 } 753 754 if (mesh_crypto_active) return; 755 756 if (!btstack_linked_list_empty(&network_pdus_received)){ 757 incoming_pdu_decoded = mesh_network_pdu_get(); 758 if (!incoming_pdu_decoded) return; 759 // get encoded network pdu and start processing 760 mesh_crypto_active = 1; 761 incoming_pdu_raw = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_received); 762 process_network_pdu(); 763 return; 764 } 765 766 if (!btstack_linked_list_empty(&network_pdus_queued)){ 767 // get queued network pdu and start processing 768 #ifdef LOG_NETWORK 769 mesh_network_dump_network_pdus("network_pdus_queued (1)", &network_pdus_queued); 770 #endif 771 outgoing_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_queued); 772 #ifdef LOG_NETWORK 773 printf("network run 5: pop %p from network_pdus_queued\n", outgoing_pdu); 774 mesh_network_dump_network_pdus("network_pdus_queued (2)", &network_pdus_queued); 775 #endif 776 mesh_network_send_a(); 777 return; 778 } 779 } 780 781 #ifdef ENABLE_MESH_ADV_BEARER 782 static void mesh_adv_bearer_handle_network_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 783 UNUSED(channel); 784 mesh_network_pdu_t * network_pdu; 785 uint8_t transmission_count; 786 uint16_t transmission_interval; 787 uint8_t transmit_config; 788 789 switch (packet_type){ 790 case MESH_NETWORK_PACKET: 791 // check len. minimal transport PDU len = 1, 32 bit NetMIC -> 13 bytes 792 if (size < 13) break; 793 794 #ifdef LOG_NETWORK 795 printf("received network pdu from adv (len %u): ", size); 796 printf_hexdump(packet, size); 797 #endif 798 mesh_network_received_message(packet, size, 0); 799 break; 800 801 case HCI_EVENT_PACKET: 802 switch(packet[0]){ 803 case HCI_EVENT_MESH_META: 804 switch(packet[2]){ 805 case MESH_SUBEVENT_CAN_SEND_NOW: 806 if (adv_bearer_network_pdu == NULL) break; 807 808 // Get Transmission config depending on relay flag 809 if (adv_bearer_network_pdu->flags & MESH_NETWORK_PDU_FLAGS_RELAY){ 810 transmit_config = mesh_foundation_relay_get(); 811 } else { 812 transmit_config = mesh_foundation_network_transmit_get(); 813 } 814 transmission_count = (transmit_config & 0x07) + 1; 815 transmission_interval = (transmit_config >> 3) * 10; 816 817 #ifdef LOG_NETWORK 818 printf("TX-E-NetworkPDU (%p) count %u, interval %u ms: ", adv_bearer_network_pdu, transmission_count, transmission_interval); 819 printf_hexdump(adv_bearer_network_pdu->data, adv_bearer_network_pdu->len); 820 #endif 821 822 adv_bearer_send_network_pdu(adv_bearer_network_pdu->data, adv_bearer_network_pdu->len, transmission_count, transmission_interval); 823 network_pdu = adv_bearer_network_pdu; 824 adv_bearer_network_pdu = NULL; 825 826 // notify upper layer 827 mesh_network_send_complete(network_pdu); 828 829 // check if more to send 830 mesh_network_run(); 831 break; 832 default: 833 break; 834 } 835 break; 836 default: 837 break; 838 } 839 break; 840 } 841 } 842 #endif 843 844 #ifdef ENABLE_MESH_GATT_BEARER 845 static void mesh_network_gatt_bearer_outgoing_complete(void){ 846 847 if (gatt_bearer_network_pdu == NULL) return; 848 849 // forward to adv bearer 850 btstack_linked_list_add_tail(&network_pdus_outgoing_adv, (btstack_linked_item_t*) gatt_bearer_network_pdu); 851 gatt_bearer_network_pdu = NULL; 852 853 mesh_network_run(); 854 return; 855 } 856 857 static void mesh_network_gatt_bearer_handle_network_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 858 UNUSED(channel); 859 switch (packet_type){ 860 case MESH_PROXY_DATA_PACKET: 861 if (mesh_foundation_gatt_proxy_get() == 0) break; 862 #ifdef LOG_NETWORK 863 printf("received network pdu from gatt (len %u): ", size); 864 printf_hexdump(packet, size); 865 #endif 866 mesh_network_received_message(packet, size, MESH_NETWORK_PDU_FLAGS_GATT_BEARER); 867 break; 868 case HCI_EVENT_PACKET: 869 switch (hci_event_packet_get_type(packet)){ 870 case HCI_EVENT_MESH_META: 871 switch (hci_event_mesh_meta_get_subevent_code(packet)){ 872 case MESH_SUBEVENT_PROXY_CONNECTED: 873 gatt_bearer_con_handle = mesh_subevent_proxy_connected_get_con_handle(packet); 874 break; 875 case MESH_SUBEVENT_PROXY_DISCONNECTED: 876 gatt_bearer_con_handle = HCI_CON_HANDLE_INVALID; 877 mesh_network_gatt_bearer_outgoing_complete(); 878 break; 879 case MESH_SUBEVENT_CAN_SEND_NOW: 880 if (gatt_bearer_network_pdu == NULL) break; 881 #ifdef LOG_NETWORK 882 printf("G-TX-E-NetworkPDU (%p): ", gatt_bearer_network_pdu); 883 printf_hexdump(gatt_bearer_network_pdu->data, gatt_bearer_network_pdu->len); 884 #endif 885 gatt_bearer_send_network_pdu(gatt_bearer_network_pdu->data, gatt_bearer_network_pdu->len); 886 break; 887 888 case MESH_SUBEVENT_MESSAGE_SENT: 889 mesh_network_gatt_bearer_outgoing_complete(); 890 break; 891 default: 892 break; 893 } 894 break; 895 default: 896 break; 897 } 898 break; 899 default: 900 break; 901 } 902 } 903 #endif 904 905 #ifdef ENABLE_MESH_GATT_BEARER 906 static void mesh_netework_gatt_bearer_handle_proxy_configuration(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 907 UNUSED(channel); 908 switch (packet_type){ 909 case MESH_PROXY_DATA_PACKET: 910 mesh_network_process_proxy_configuration_message(packet, size); 911 break; 912 case HCI_EVENT_PACKET: 913 switch (hci_event_packet_get_type(packet)){ 914 case HCI_EVENT_MESH_META: 915 switch (hci_event_mesh_meta_get_subevent_code(packet)){ 916 case MESH_SUBEVENT_CAN_SEND_NOW: 917 // forward to higher layer 918 (*mesh_network_proxy_message_handler)(MESH_NETWORK_CAN_SEND_NOW, NULL); 919 break; 920 default: 921 break; 922 } 923 break; 924 default: 925 break; 926 } 927 break; 928 default: 929 break; 930 } 931 } 932 #endif 933 934 void mesh_network_init(void){ 935 #ifdef ENABLE_MESH_ADV_BEARER 936 adv_bearer_register_for_network_pdu(&mesh_adv_bearer_handle_network_event); 937 #endif 938 #ifdef ENABLE_MESH_GATT_BEARER 939 gatt_bearer_con_handle = HCI_CON_HANDLE_INVALID; 940 gatt_bearer_register_for_network_pdu(&mesh_network_gatt_bearer_handle_network_event); 941 gatt_bearer_register_for_mesh_proxy_configuration(&mesh_netework_gatt_bearer_handle_proxy_configuration); 942 #endif 943 } 944 945 void mesh_network_set_higher_layer_handler(void (*packet_handler)(mesh_network_callback_type_t callback_type, mesh_network_pdu_t * network_pdu)){ 946 mesh_network_higher_layer_handler = packet_handler; 947 } 948 949 void mesh_network_set_proxy_message_handler(void (*packet_handler)(mesh_network_callback_type_t callback_type, mesh_network_pdu_t * network_pdu)){ 950 mesh_network_proxy_message_handler = packet_handler; 951 } 952 953 void mesh_network_received_message(const uint8_t * pdu_data, uint8_t pdu_len, uint8_t flags){ 954 // verify len 955 if (pdu_len > 29) return; 956 957 // allocate network_pdu 958 mesh_network_pdu_t * network_pdu = mesh_network_pdu_get(); 959 if (!network_pdu) return; 960 961 // store data 962 memcpy(network_pdu->data, pdu_data, pdu_len); 963 network_pdu->len = pdu_len; 964 network_pdu->flags = flags; 965 966 // add to list and go 967 btstack_linked_list_add_tail(&network_pdus_received, (btstack_linked_item_t *) network_pdu); 968 mesh_network_run(); 969 970 } 971 972 void mesh_network_process_proxy_configuration_message(const uint8_t * pdu_data, uint8_t pdu_len){ 973 // verify len 974 if (pdu_len > 29) return; 975 976 // allocate network_pdu 977 mesh_network_pdu_t * network_pdu = mesh_network_pdu_get(); 978 if (!network_pdu) return; 979 980 // store data 981 memcpy(network_pdu->data, pdu_data, pdu_len); 982 network_pdu->len = pdu_len; 983 network_pdu->flags = MESH_NETWORK_PDU_FLAGS_PROXY_CONFIGURATION; // Network PDU 984 985 // add to list and go 986 btstack_linked_list_add_tail(&network_pdus_received, (btstack_linked_item_t *) network_pdu); 987 mesh_network_run(); 988 } 989 990 void mesh_network_send_pdu(mesh_network_pdu_t * network_pdu){ 991 #ifdef LOG_NETWORK 992 printf("TX-NetworkPDU (%p): ", network_pdu); 993 printf_hexdump(network_pdu->data, network_pdu->len); 994 printf("^^ into network_pdus_queued\n"); 995 #endif 996 997 btstack_assert((network_pdu->len + (network_pdu->data[1] & 0x80 ? 8 : 4)) <= 29); 998 btstack_assert(network_pdu->len >= 9); 999 1000 // setup callback 1001 network_pdu->callback = &mesh_network_send_d; 1002 network_pdu->flags = 0; 1003 1004 // queue up 1005 btstack_linked_list_add_tail(&network_pdus_queued, (btstack_linked_item_t *) network_pdu); 1006 #ifdef LOG_NETWORK 1007 mesh_network_dump_network_pdus("network_pdus_queued", &network_pdus_queued); 1008 #endif 1009 1010 // go 1011 mesh_network_run(); 1012 } 1013 1014 void mesh_network_encrypt_proxy_configuration_message(mesh_network_pdu_t * network_pdu, void (* callback)(mesh_network_pdu_t * callback)){ 1015 printf("ProxyPDU(unencrypted): "); 1016 printf_hexdump(network_pdu->data, network_pdu->len); 1017 1018 // setup callback 1019 network_pdu->callback = callback; 1020 network_pdu->flags = MESH_NETWORK_PDU_FLAGS_PROXY_CONFIGURATION; 1021 1022 // queue up 1023 btstack_linked_list_add_tail(&network_pdus_queued, (btstack_linked_item_t *) network_pdu); 1024 1025 // go 1026 mesh_network_run(); 1027 } 1028 1029 /* 1030 * @brief Setup network pdu header 1031 * @param netkey_index 1032 * @param ctl 1033 * @param ttl 1034 * @param seq 1035 * @param dest 1036 */ 1037 void mesh_network_setup_pdu(mesh_network_pdu_t * network_pdu, uint16_t netkey_index, uint8_t nid, uint8_t ctl, uint8_t ttl, uint32_t seq, uint16_t src, uint16_t dest, const uint8_t * transport_pdu_data, uint8_t transport_pdu_len){ 1038 memset(network_pdu, 0, sizeof(mesh_network_pdu_t)); 1039 // set netkey_index 1040 network_pdu->netkey_index = netkey_index; 1041 // setup header 1042 network_pdu->data[network_pdu->len++] = (mesh_get_iv_index_for_tx() << 7) | nid; 1043 uint8_t ctl_ttl = (ctl << 7) | (ttl & 0x7f); 1044 network_pdu->data[network_pdu->len++] = ctl_ttl; 1045 big_endian_store_24(network_pdu->data, 2, seq); 1046 network_pdu->len += 3; 1047 big_endian_store_16(network_pdu->data, network_pdu->len, src); 1048 network_pdu->len += 2; 1049 big_endian_store_16(network_pdu->data, network_pdu->len, dest); 1050 network_pdu->len += 2; 1051 memcpy(&network_pdu->data[network_pdu->len], transport_pdu_data, transport_pdu_len); 1052 network_pdu->len += transport_pdu_len; 1053 } 1054 1055 /* 1056 * @brief Setup network pdu header 1057 * @param netkey_index 1058 * @param ctl 1059 * @param ttl 1060 * @param seq 1061 * @param dest 1062 */ 1063 void mesh_network_setup_pdu_header(mesh_network_pdu_t * network_pdu, uint16_t netkey_index, uint8_t nid, uint8_t ctl, uint8_t ttl, uint32_t seq, uint16_t src, uint16_t dest){ 1064 // set netkey_index 1065 network_pdu->netkey_index = netkey_index; 1066 // setup header 1067 network_pdu->data[0] = (mesh_get_iv_index_for_tx() << 7) | nid; 1068 uint8_t ctl_ttl = (ctl << 7) | (ttl & 0x7f); 1069 network_pdu->data[1] = ctl_ttl; 1070 big_endian_store_24(network_pdu->data, 2, seq); 1071 big_endian_store_16(network_pdu->data, 5, src); 1072 big_endian_store_16(network_pdu->data, 7, dest); 1073 } 1074 1075 // Network PDU Getter 1076 uint8_t mesh_network_nid(mesh_network_pdu_t * network_pdu){ 1077 return network_pdu->data[0] & 0x7f; 1078 } 1079 uint16_t mesh_network_control(mesh_network_pdu_t * network_pdu){ 1080 return network_pdu->data[1] & 0x80; 1081 } 1082 uint8_t mesh_network_ttl(mesh_network_pdu_t * network_pdu){ 1083 return network_pdu->data[1] & 0x7f; 1084 } 1085 uint32_t mesh_network_seq(mesh_network_pdu_t * network_pdu){ 1086 return big_endian_read_24(network_pdu->data, 2); 1087 } 1088 uint16_t mesh_network_src(mesh_network_pdu_t * network_pdu){ 1089 return big_endian_read_16(network_pdu->data, 5); 1090 } 1091 uint16_t mesh_network_dst(mesh_network_pdu_t * network_pdu){ 1092 return big_endian_read_16(network_pdu->data, 7); 1093 } 1094 int mesh_network_segmented(mesh_network_pdu_t * network_pdu){ 1095 return network_pdu->data[9] & 0x80; 1096 } 1097 uint8_t mesh_network_control_opcode(mesh_network_pdu_t * network_pdu){ 1098 return network_pdu->data[9] & 0x7f; 1099 } 1100 uint8_t * mesh_network_pdu_data(mesh_network_pdu_t * network_pdu){ 1101 return &network_pdu->data[9]; 1102 } 1103 uint8_t mesh_network_pdu_len(mesh_network_pdu_t * network_pdu){ 1104 return network_pdu->len - 9; 1105 } 1106 1107 void mesh_network_pdu_set_seq(mesh_network_pdu_t * network_pdu, uint32_t seq){ 1108 big_endian_store_24(network_pdu->data, 2, seq); 1109 } 1110 1111 static void mesh_network_dump_network_pdu(mesh_network_pdu_t * network_pdu){ 1112 if (network_pdu){ 1113 printf("- %p: ", network_pdu); printf_hexdump(network_pdu->data, network_pdu->len); 1114 } 1115 } 1116 static void mesh_network_dump_network_pdus(const char * name, btstack_linked_list_t * list){ 1117 printf("List: %s:\n", name); 1118 btstack_linked_list_iterator_t it; 1119 btstack_linked_list_iterator_init(&it, list); 1120 while (btstack_linked_list_iterator_has_next(&it)){ 1121 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t*) btstack_linked_list_iterator_next(&it); 1122 mesh_network_dump_network_pdu(network_pdu); 1123 } 1124 } 1125 static void mesh_network_reset_network_pdus(btstack_linked_list_t * list){ 1126 while (!btstack_linked_list_empty(list)){ 1127 mesh_network_pdu_t * pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(list); 1128 btstack_memory_mesh_network_pdu_free(pdu); 1129 } 1130 } 1131 void mesh_network_dump(void){ 1132 mesh_network_dump_network_pdus("network_pdus_received", &network_pdus_received); 1133 mesh_network_dump_network_pdus("network_pdus_queued", &network_pdus_queued); 1134 mesh_network_dump_network_pdus("network_pdus_outgoing_gatt", &network_pdus_outgoing_gatt); 1135 mesh_network_dump_network_pdus("network_pdus_outgoing_adv", &network_pdus_outgoing_adv); 1136 printf("outgoing_pdu: \n"); 1137 mesh_network_dump_network_pdu(outgoing_pdu); 1138 printf("incoming_pdu_raw: \n"); 1139 mesh_network_dump_network_pdu(incoming_pdu_raw); 1140 #ifdef ENABLE_MESH_GATT_BEARER 1141 printf("gatt_bearer_network_pdu: \n"); 1142 mesh_network_dump_network_pdu(gatt_bearer_network_pdu); 1143 #endif 1144 #ifdef ENABLE_MESH_ADV_BEARER 1145 printf("adv_bearer_network_pdu: \n"); 1146 mesh_network_dump_network_pdu(adv_bearer_network_pdu); 1147 #endif 1148 1149 } 1150 void mesh_network_reset(void){ 1151 mesh_network_reset_network_pdus(&network_pdus_received); 1152 mesh_network_reset_network_pdus(&network_pdus_queued); 1153 mesh_network_reset_network_pdus(&network_pdus_outgoing_gatt); 1154 mesh_network_reset_network_pdus(&network_pdus_outgoing_adv); 1155 1156 // outgoing network pdus are owned by higher layer, so we don't free: 1157 // - adv_bearer_network_pdu 1158 // - gatt_bearer_network_pdu 1159 // - outoing_pdu 1160 #ifdef ENABLE_MESH_ADV_BEARER 1161 adv_bearer_network_pdu = NULL; 1162 #endif 1163 #ifdef ENABLE_MESH_GATT_BEARER 1164 gatt_bearer_network_pdu = NULL; 1165 #endif 1166 outgoing_pdu = NULL; 1167 1168 if (incoming_pdu_raw){ 1169 mesh_network_pdu_free(incoming_pdu_raw); 1170 incoming_pdu_raw = NULL; 1171 } 1172 if (incoming_pdu_decoded){ 1173 mesh_network_pdu_free(incoming_pdu_decoded); 1174 incoming_pdu_decoded = NULL; 1175 } 1176 mesh_crypto_active = 0; 1177 } 1178 1179 // buffer pool 1180 mesh_network_pdu_t * mesh_network_pdu_get(void){ 1181 mesh_network_pdu_t * network_pdu = btstack_memory_mesh_network_pdu_get(); 1182 if (network_pdu) { 1183 memset(network_pdu, 0, sizeof(mesh_network_pdu_t)); 1184 network_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_NETWORK; 1185 } 1186 return network_pdu; 1187 } 1188 1189 void mesh_network_pdu_free(mesh_network_pdu_t * network_pdu){ 1190 btstack_memory_mesh_network_pdu_free(network_pdu); 1191 } 1192 1193 // Mesh Subnet Management 1194 1195 void mesh_subnet_add(mesh_subnet_t * subnet){ 1196 btstack_linked_list_add_tail(&subnets, (btstack_linked_item_t *) subnet); 1197 } 1198 1199 void mesh_subnet_remove(mesh_subnet_t * subnet){ 1200 btstack_linked_list_remove(&subnets, (btstack_linked_item_t *) subnet); 1201 } 1202 1203 mesh_subnet_t * mesh_subnet_get_by_netkey_index(uint16_t netkey_index){ 1204 btstack_linked_list_iterator_t it; 1205 btstack_linked_list_iterator_init(&it, &subnets); 1206 while (btstack_linked_list_iterator_has_next(&it)){ 1207 mesh_subnet_t * item = (mesh_subnet_t *) btstack_linked_list_iterator_next(&it); 1208 if (item->netkey_index == netkey_index) return item; 1209 } 1210 return NULL; 1211 } 1212 1213 int mesh_subnet_list_count(void){ 1214 return btstack_linked_list_count(&subnets); 1215 } 1216 1217 // mesh network key iterator over all keys 1218 void mesh_subnet_iterator_init(mesh_subnet_iterator_t *it){ 1219 btstack_linked_list_iterator_init(&it->it, &subnets); 1220 } 1221 1222 int mesh_subnet_iterator_has_more(mesh_subnet_iterator_t *it){ 1223 return btstack_linked_list_iterator_has_next(&it->it); 1224 } 1225 1226 mesh_subnet_t * mesh_subnet_iterator_get_next(mesh_subnet_iterator_t *it){ 1227 return (mesh_subnet_t *) btstack_linked_list_iterator_next(&it->it); 1228 } 1229 1230 mesh_network_key_t * mesh_subnet_get_outgoing_network_key(mesh_subnet_t * subnet){ 1231 switch (subnet->key_refresh){ 1232 case MESH_KEY_REFRESH_SECOND_PHASE: 1233 return subnet->new_key; 1234 case MESH_KEY_REFRESH_NOT_ACTIVE: 1235 case MESH_KEY_REFRESH_FIRST_PHASE: 1236 default: 1237 return subnet->old_key; 1238 } 1239 } 1240 1241 /** 1242 * @brief Setup subnet for given netkey index 1243 */ 1244 void mesh_subnet_setup_for_netkey_index(uint16_t netkey_index){ 1245 mesh_subnet_t * subnet = mesh_subnet_get_by_netkey_index(netkey_index); 1246 if (subnet != NULL) return; 1247 1248 // find old / new keys 1249 mesh_network_key_t * old_key = NULL; 1250 mesh_network_key_t * new_key = NULL; 1251 mesh_network_key_iterator_t it; 1252 mesh_network_key_iterator_init(&it); 1253 while (mesh_network_key_iterator_has_more(&it)){ 1254 mesh_network_key_t * network_key = mesh_network_key_iterator_get_next(&it); 1255 if (network_key->netkey_index != netkey_index) continue; 1256 if (old_key == NULL){ 1257 old_key = network_key; 1258 continue; 1259 } 1260 // assign current key depending on key version 1261 if (((int8_t) (network_key->version - new_key->version)) > 0) { 1262 new_key = network_key; 1263 } else { 1264 new_key = old_key; 1265 old_key = network_key; 1266 } 1267 } 1268 1269 // create subnet for netkey index 1270 subnet = btstack_memory_mesh_subnet_get(); 1271 if (subnet == NULL) return; 1272 subnet->netkey_index = netkey_index; 1273 mesh_subnet_add(subnet); 1274 1275 // set keys 1276 subnet->old_key = old_key; 1277 subnet->new_key = new_key; 1278 1279 // key refresh 1280 if (new_key == NULL){ 1281 // single key -> key refresh not active 1282 subnet->key_refresh = MESH_KEY_REFRESH_NOT_ACTIVE; 1283 } 1284 else { 1285 // two keys -> at least phase 1 1286 subnet->key_refresh = MESH_KEY_REFRESH_FIRST_PHASE; 1287 } 1288 } 1289