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 (void)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 (void)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 (void)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 (void)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_in_bit_7 = 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_in_bit_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 (void)memcpy(&incoming_pdu_decoded->data[incoming_pdu_decoded->len - net_mic_len], 498 net_mic, net_mic_len); 499 500 #ifdef LOG_NETWORK 501 uint8_t cypher_len = incoming_pdu_decoded->len - 9 - net_mic_len; 502 printf("RX-Decrypted DST/TransportPDU (%p): ", incoming_pdu_decoded); 503 printf_hexdump(&incoming_pdu_decoded->data[7], 2 + cypher_len); 504 505 printf("RX-Decrypted: "); 506 printf_hexdump(incoming_pdu_decoded->data, incoming_pdu_decoded->len); 507 #endif 508 509 // validate network mic 510 if (memcmp(net_mic, &incoming_pdu_raw->data[incoming_pdu_decoded->len-net_mic_len], net_mic_len) != 0){ 511 // fail 512 printf("RX-NetMIC mismatch, try next key (%p)\n", incoming_pdu_decoded); 513 process_network_pdu_validate(); 514 return; 515 } 516 517 // remove NetMIC from payload 518 incoming_pdu_decoded->len -= net_mic_len; 519 520 #ifdef LOG_NETWORK 521 // match 522 printf("RX-NetMIC matches (%p)\n", incoming_pdu_decoded); 523 printf("RX-TTL (%p): 0x%02x\n", incoming_pdu_decoded, incoming_pdu_decoded->data[1] & 0x7f); 524 #endif 525 526 // set netkey_index 527 incoming_pdu_decoded->netkey_index = current_network_key->netkey_index; 528 529 if (incoming_pdu_decoded->flags & MESH_NETWORK_PDU_FLAGS_PROXY_CONFIGURATION){ 530 531 mesh_network_pdu_t * decoded_pdu = incoming_pdu_decoded; 532 incoming_pdu_decoded = NULL; 533 534 // no additional checks for proxy messages 535 (*mesh_network_proxy_message_handler)(MESH_NETWORK_PDU_RECEIVED, decoded_pdu); 536 537 } else { 538 539 // validate src/dest addresses 540 uint16_t src = big_endian_read_16(incoming_pdu_decoded->data, 5); 541 uint16_t dst = big_endian_read_16(incoming_pdu_decoded->data, 7); 542 int valid = mesh_network_addresses_valid(ctl, src, dst); 543 if (!valid){ 544 #ifdef LOG_NETWORK 545 printf("RX Address invalid (%p)\n", incoming_pdu_decoded); 546 #endif 547 btstack_memory_mesh_network_pdu_free(incoming_pdu_decoded); 548 incoming_pdu_decoded = NULL; 549 process_network_pdu_done(); 550 return; 551 } 552 553 // check cache 554 uint32_t hash = mesh_network_cache_hash(incoming_pdu_decoded); 555 #ifdef LOG_NETWORK 556 printf("RX-Hash (%p): %08x\n", incoming_pdu_decoded, hash); 557 #endif 558 if (mesh_network_cache_find(hash)){ 559 // found in cache, drop 560 #ifdef LOG_NETWORK 561 printf("Found in cache -> drop packet (%p)\n", incoming_pdu_decoded); 562 #endif 563 btstack_memory_mesh_network_pdu_free(incoming_pdu_decoded); 564 incoming_pdu_decoded = NULL; 565 process_network_pdu_done(); 566 return; 567 } 568 569 // store in network cache 570 mesh_network_cache_add(hash); 571 572 #ifdef LOG_NETWORK 573 printf("RX-Validated (%p) - forward to lower transport\n", incoming_pdu_decoded); 574 #endif 575 576 // forward to lower transport layer. message is freed by call to mesh_network_message_processed_by_upper_layer 577 mesh_network_pdu_t * decoded_pdu = incoming_pdu_decoded; 578 incoming_pdu_decoded = NULL; 579 (*mesh_network_higher_layer_handler)(MESH_NETWORK_PDU_RECEIVED, decoded_pdu); 580 } 581 582 // done 583 process_network_pdu_done(); 584 } 585 586 static uint32_t iv_index_for_pdu(const mesh_network_pdu_t * network_pdu){ 587 // get IV Index and IVI 588 uint32_t iv_index = mesh_get_iv_index(); 589 int ivi = network_pdu->data[0] >> 7; 590 591 // if least significant bit differs, use previous IV Index 592 if ((iv_index & 1 ) ^ ivi){ 593 iv_index--; 594 #ifdef LOG_NETWORK 595 printf("RX-IV: IVI indicates previous IV index, using 0x%08x\n", iv_index); 596 #endif 597 } 598 return iv_index; 599 } 600 601 static void process_network_pdu_validate_b(void * arg){ 602 UNUSED(arg); 603 604 #ifdef LOG_NETWORK 605 printf("RX-PECB: "); 606 printf_hexdump(obfuscation_block, 6); 607 #endif 608 609 // de-obfuscate 610 unsigned int i; 611 for (i=0;i<6;i++){ 612 incoming_pdu_decoded->data[1+i] = incoming_pdu_raw->data[1+i] ^ obfuscation_block[i]; 613 } 614 615 uint32_t iv_index = iv_index_for_pdu(incoming_pdu_raw); 616 617 if (incoming_pdu_decoded->flags & MESH_NETWORK_PDU_FLAGS_PROXY_CONFIGURATION){ 618 // create network nonce 619 mesh_proxy_create_nonce(network_nonce, incoming_pdu_decoded, iv_index); 620 #ifdef LOG_NETWORK 621 printf("RX-Proxy Nonce: "); 622 printf_hexdump(network_nonce, 13); 623 #endif 624 } else { 625 // create network nonce 626 mesh_network_create_nonce(network_nonce, incoming_pdu_decoded, iv_index); 627 #ifdef LOG_NETWORK 628 printf("RX-Network Nonce: "); 629 printf_hexdump(network_nonce, 13); 630 #endif 631 } 632 633 // 634 uint8_t ctl_ttl = incoming_pdu_decoded->data[1]; 635 uint8_t net_mic_len = (ctl_ttl & 0x80) ? 8 : 4; 636 uint8_t cypher_len = incoming_pdu_decoded->len - 7 - net_mic_len; 637 638 #ifdef LOG_NETWORK 639 printf("RX-Cyper len %u, mic len %u\n", cypher_len, net_mic_len); 640 641 printf("RX-Encryption Key: "); 642 printf_hexdump(current_network_key->encryption_key, 16); 643 644 #endif 645 646 btstack_crypto_ccm_init(&mesh_network_crypto_request.ccm, current_network_key->encryption_key, network_nonce, cypher_len, 0, net_mic_len); 647 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); 648 } 649 650 static void process_network_pdu_validate(void){ 651 if (!mesh_network_key_nid_iterator_has_more(&validation_network_key_it)){ 652 printf("No valid network key found\n"); 653 btstack_memory_mesh_network_pdu_free(incoming_pdu_decoded); 654 incoming_pdu_decoded = NULL; 655 process_network_pdu_done(); 656 return; 657 } 658 659 current_network_key = mesh_network_key_nid_iterator_get_next(&validation_network_key_it); 660 661 // calc PECB 662 uint32_t iv_index = iv_index_for_pdu(incoming_pdu_raw); 663 memset(encryption_block, 0, 5); 664 big_endian_store_32(encryption_block, 5, iv_index); 665 (void)memcpy(&encryption_block[9], &incoming_pdu_raw->data[7], 7); 666 btstack_crypto_aes128_encrypt(&mesh_network_crypto_request.aes128, current_network_key->privacy_key, encryption_block, obfuscation_block, &process_network_pdu_validate_b, NULL); 667 } 668 669 670 static void process_network_pdu(void){ 671 // 672 uint8_t nid_ivi = incoming_pdu_raw->data[0]; 673 674 // setup pdu object 675 incoming_pdu_decoded->data[0] = nid_ivi; 676 incoming_pdu_decoded->len = incoming_pdu_raw->len; 677 incoming_pdu_decoded->flags = incoming_pdu_raw->flags; 678 679 // init provisioning data iterator 680 uint8_t nid = nid_ivi & 0x7f; 681 // uint8_t iv_index = network_pdu_data[0] >> 7; 682 mesh_network_key_nid_iterator_init(&validation_network_key_it, nid); 683 684 process_network_pdu_validate(); 685 } 686 687 // returns true if done 688 static bool mesh_network_run_gatt(void){ 689 if (btstack_linked_list_empty(&network_pdus_outgoing_gatt)){ 690 return true; 691 } 692 693 #ifdef ENABLE_MESH_GATT_BEARER 694 if (gatt_bearer_network_pdu != NULL){ 695 return true; 696 } 697 698 // move to 'gatt bearer queue' 699 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_outgoing_gatt); 700 701 #ifdef LOG_NETWORK 702 printf("network run 1: pop %p from network_pdus_outgoing_gatt\n", network_pdu); 703 #endif 704 // request to send via gatt if: 705 // proxy active and connected 706 // packet wasn't received via gatt bearer 707 int send_via_gatt = ((mesh_foundation_gatt_proxy_get() != 0) && 708 (gatt_bearer_con_handle != HCI_CON_HANDLE_INVALID) && 709 ((network_pdu->flags & MESH_NETWORK_PDU_FLAGS_GATT_BEARER) == 0)); 710 if (send_via_gatt){ 711 712 #ifdef LOG_NETWORK 713 printf("network run 2: set %p as gatt_bearer_network_pdu\n", network_pdu); 714 #endif 715 gatt_bearer_network_pdu = network_pdu; 716 gatt_bearer_request_can_send_now_for_network_pdu(); 717 718 } else { 719 720 #ifdef LOG_NETWORK 721 printf("network run 3: push %p to network_pdus_outgoing_adv\n", network_pdu); 722 #endif 723 btstack_linked_list_add_tail(&network_pdus_outgoing_adv, (btstack_linked_item_t *) network_pdu); 724 725 #ifdef LOG_NETWORK 726 mesh_network_dump_network_pdus("network_pdus_outgoing_adv (1)", &network_pdus_outgoing_adv); 727 #endif 728 } 729 #else 730 // directly move to 'outgoing adv bearer queue' 731 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_outgoing_gatt); 732 btstack_linked_list_add_tail(&network_pdus_outgoing_adv, (btstack_linked_item_t *) network_pdu); 733 #endif 734 return false; 735 } 736 737 // returns true if done 738 static bool mesh_network_run_adv(void){ 739 740 if (btstack_linked_list_empty(&network_pdus_outgoing_adv)){ 741 return true; 742 } 743 744 #ifdef ENABLE_MESH_ADV_BEARER 745 if (adv_bearer_network_pdu != NULL){ 746 return true; 747 } 748 749 // move to 'adv bearer queue' 750 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_outgoing_adv); 751 752 #ifdef LOG_NETWORK 753 printf("network run 4: pop %p from network_pdus_outgoing_adv\n", network_pdu); 754 mesh_network_dump_network_pdus("network_pdus_outgoing_adv (3)", &network_pdus_outgoing_adv); 755 printf("network run 5: %p -> flags 0x%02x, gatt_proxy %u, relay %u\n", network_pdu, network_pdu->flags, mesh_foundation_gatt_proxy_get(), mesh_foundation_relay_get()); 756 #endif 757 758 // send via adv if: 759 // packet was received via gatt bearer and proxy active, or, 760 // packet originated locally (== not relayed), or, 761 // packet was received via ADV bearer and relay is active, or, 762 int send_via_adv = (((network_pdu->flags & MESH_NETWORK_PDU_FLAGS_GATT_BEARER) != 0) && (mesh_foundation_gatt_proxy_get() == 1)) || 763 (((network_pdu->flags & MESH_NETWORK_PDU_FLAGS_GATT_BEARER) == 0) && (mesh_foundation_relay_get() == 1)) || 764 ((network_pdu->flags & MESH_NETWORK_PDU_FLAGS_RELAY) == 0); 765 766 if (send_via_adv){ 767 #ifdef LOG_NETWORK 768 printf("network run 6: set %p as to adv_bearer_network_pdu\n", network_pdu); 769 #endif 770 adv_bearer_network_pdu = network_pdu; 771 adv_bearer_request_can_send_now_for_network_pdu(); 772 } else { 773 #ifdef LOG_NETWORK 774 printf("network run 7: skip sending %p via adv bearer\n", network_pdu); 775 #endif 776 // directly notify upper layer 777 mesh_network_send_complete(network_pdu); 778 } 779 #else 780 // done 781 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_outgoing_adv); 782 // directly notify upper layer 783 mesh_network_send_complete(network_pdu); 784 #endif 785 return false; 786 } 787 788 // returns true if done 789 static bool mesh_network_run_received(void){ 790 if (mesh_crypto_active) { 791 return true; 792 } 793 794 if (btstack_linked_list_empty(&network_pdus_received)) { 795 return true; 796 } 797 798 incoming_pdu_decoded = mesh_network_pdu_get(); 799 if (incoming_pdu_decoded == NULL) return true; 800 801 // get encoded network pdu and start processing 802 mesh_crypto_active = 1; 803 incoming_pdu_raw = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_received); 804 process_network_pdu(); 805 return true; 806 } 807 808 // returns true if done 809 static bool mesh_network_run_queued(void){ 810 if (mesh_crypto_active) { 811 return true; 812 } 813 814 if (btstack_linked_list_empty(&network_pdus_queued)){ 815 return true; 816 } 817 818 // get queued network pdu and start processing 819 outgoing_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_queued); 820 821 #ifdef LOG_NETWORK 822 printf("network run 5: pop %p from network_pdus_queued\n", outgoing_pdu); 823 mesh_network_dump_network_pdus("network_pdus_queued (2)", &network_pdus_queued); 824 #endif 825 mesh_network_send_a(); 826 return true; 827 } 828 829 static void mesh_network_run(void){ 830 while (true){ 831 bool done = true; 832 done &= mesh_network_run_gatt(); 833 done &= mesh_network_run_adv(); 834 done &= mesh_network_run_received(); 835 done &= mesh_network_run_queued(); 836 if (done) break; 837 } 838 } 839 840 #ifdef ENABLE_MESH_ADV_BEARER 841 static void mesh_adv_bearer_handle_network_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 842 UNUSED(channel); 843 mesh_network_pdu_t * network_pdu; 844 uint8_t transmission_count; 845 uint16_t transmission_interval; 846 uint8_t transmit_config; 847 848 switch (packet_type){ 849 case MESH_NETWORK_PACKET: 850 // check len. minimal transport PDU len = 1, 32 bit NetMIC -> 13 bytes 851 if (size < 13) break; 852 853 #ifdef LOG_NETWORK 854 printf("received network pdu from adv (len %u): ", size); 855 printf_hexdump(packet, size); 856 #endif 857 mesh_network_received_message(packet, size, 0); 858 break; 859 860 case HCI_EVENT_PACKET: 861 switch(packet[0]){ 862 case HCI_EVENT_MESH_META: 863 switch(packet[2]){ 864 case MESH_SUBEVENT_CAN_SEND_NOW: 865 if (adv_bearer_network_pdu == NULL) break; 866 867 // Get Transmission config depending on relay flag 868 if (adv_bearer_network_pdu->flags & MESH_NETWORK_PDU_FLAGS_RELAY){ 869 transmit_config = mesh_foundation_relay_get(); 870 } else { 871 transmit_config = mesh_foundation_network_transmit_get(); 872 } 873 transmission_count = (transmit_config & 0x07) + 1; 874 transmission_interval = (transmit_config >> 3) * 10; 875 876 #ifdef LOG_NETWORK 877 printf("TX-E-NetworkPDU (%p) count %u, interval %u ms: ", adv_bearer_network_pdu, transmission_count, transmission_interval); 878 printf_hexdump(adv_bearer_network_pdu->data, adv_bearer_network_pdu->len); 879 #endif 880 881 adv_bearer_send_network_pdu(adv_bearer_network_pdu->data, adv_bearer_network_pdu->len, transmission_count, transmission_interval); 882 network_pdu = adv_bearer_network_pdu; 883 adv_bearer_network_pdu = NULL; 884 885 // notify upper layer 886 mesh_network_send_complete(network_pdu); 887 888 // check if more to send 889 mesh_network_run(); 890 break; 891 default: 892 break; 893 } 894 break; 895 default: 896 break; 897 } 898 break; 899 } 900 } 901 #endif 902 903 #ifdef ENABLE_MESH_GATT_BEARER 904 static void mesh_network_gatt_bearer_outgoing_complete(void){ 905 906 if (gatt_bearer_network_pdu == NULL) return; 907 908 // forward to adv bearer 909 btstack_linked_list_add_tail(&network_pdus_outgoing_adv, (btstack_linked_item_t*) gatt_bearer_network_pdu); 910 gatt_bearer_network_pdu = NULL; 911 912 mesh_network_run(); 913 return; 914 } 915 916 static void mesh_network_gatt_bearer_handle_network_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 917 UNUSED(channel); 918 switch (packet_type){ 919 case MESH_PROXY_DATA_PACKET: 920 if (mesh_foundation_gatt_proxy_get() == 0) break; 921 #ifdef LOG_NETWORK 922 printf("received network pdu from gatt (len %u): ", size); 923 printf_hexdump(packet, size); 924 #endif 925 mesh_network_received_message(packet, size, MESH_NETWORK_PDU_FLAGS_GATT_BEARER); 926 break; 927 case HCI_EVENT_PACKET: 928 switch (hci_event_packet_get_type(packet)){ 929 case HCI_EVENT_MESH_META: 930 switch (hci_event_mesh_meta_get_subevent_code(packet)){ 931 case MESH_SUBEVENT_PROXY_CONNECTED: 932 gatt_bearer_con_handle = mesh_subevent_proxy_connected_get_con_handle(packet); 933 break; 934 case MESH_SUBEVENT_PROXY_DISCONNECTED: 935 gatt_bearer_con_handle = HCI_CON_HANDLE_INVALID; 936 mesh_network_gatt_bearer_outgoing_complete(); 937 break; 938 case MESH_SUBEVENT_CAN_SEND_NOW: 939 if (gatt_bearer_network_pdu == NULL) break; 940 #ifdef LOG_NETWORK 941 printf("G-TX-E-NetworkPDU (%p): ", gatt_bearer_network_pdu); 942 printf_hexdump(gatt_bearer_network_pdu->data, gatt_bearer_network_pdu->len); 943 #endif 944 gatt_bearer_send_network_pdu(gatt_bearer_network_pdu->data, gatt_bearer_network_pdu->len); 945 break; 946 947 case MESH_SUBEVENT_MESSAGE_SENT: 948 mesh_network_gatt_bearer_outgoing_complete(); 949 break; 950 default: 951 break; 952 } 953 break; 954 default: 955 break; 956 } 957 break; 958 default: 959 break; 960 } 961 } 962 #endif 963 964 #ifdef ENABLE_MESH_GATT_BEARER 965 static void mesh_netework_gatt_bearer_handle_proxy_configuration(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 966 UNUSED(channel); 967 switch (packet_type){ 968 case MESH_PROXY_DATA_PACKET: 969 mesh_network_process_proxy_configuration_message(packet, size); 970 break; 971 case HCI_EVENT_PACKET: 972 switch (hci_event_packet_get_type(packet)){ 973 case HCI_EVENT_MESH_META: 974 switch (hci_event_mesh_meta_get_subevent_code(packet)){ 975 case MESH_SUBEVENT_CAN_SEND_NOW: 976 // forward to higher layer 977 (*mesh_network_proxy_message_handler)(MESH_NETWORK_CAN_SEND_NOW, NULL); 978 break; 979 default: 980 break; 981 } 982 break; 983 default: 984 break; 985 } 986 break; 987 default: 988 break; 989 } 990 } 991 #endif 992 993 void mesh_network_init(void){ 994 #ifdef ENABLE_MESH_ADV_BEARER 995 adv_bearer_register_for_network_pdu(&mesh_adv_bearer_handle_network_event); 996 #endif 997 #ifdef ENABLE_MESH_GATT_BEARER 998 gatt_bearer_con_handle = HCI_CON_HANDLE_INVALID; 999 gatt_bearer_register_for_network_pdu(&mesh_network_gatt_bearer_handle_network_event); 1000 gatt_bearer_register_for_mesh_proxy_configuration(&mesh_netework_gatt_bearer_handle_proxy_configuration); 1001 #endif 1002 } 1003 1004 void mesh_network_set_higher_layer_handler(void (*packet_handler)(mesh_network_callback_type_t callback_type, mesh_network_pdu_t * network_pdu)){ 1005 mesh_network_higher_layer_handler = packet_handler; 1006 } 1007 1008 void mesh_network_set_proxy_message_handler(void (*packet_handler)(mesh_network_callback_type_t callback_type, mesh_network_pdu_t * network_pdu)){ 1009 mesh_network_proxy_message_handler = packet_handler; 1010 } 1011 1012 void mesh_network_received_message(const uint8_t * pdu_data, uint8_t pdu_len, uint8_t flags){ 1013 // verify len 1014 if (pdu_len > 29) return; 1015 1016 // allocate network_pdu 1017 mesh_network_pdu_t * network_pdu = mesh_network_pdu_get(); 1018 if (!network_pdu) return; 1019 1020 // store data 1021 (void)memcpy(network_pdu->data, pdu_data, pdu_len); 1022 network_pdu->len = pdu_len; 1023 network_pdu->flags = flags; 1024 1025 // add to list and go 1026 btstack_linked_list_add_tail(&network_pdus_received, (btstack_linked_item_t *) network_pdu); 1027 mesh_network_run(); 1028 1029 } 1030 1031 void mesh_network_process_proxy_configuration_message(const uint8_t * pdu_data, uint8_t pdu_len){ 1032 // verify len 1033 if (pdu_len > 29) return; 1034 1035 // allocate network_pdu 1036 mesh_network_pdu_t * network_pdu = mesh_network_pdu_get(); 1037 if (!network_pdu) return; 1038 1039 // store data 1040 (void)memcpy(network_pdu->data, pdu_data, pdu_len); 1041 network_pdu->len = pdu_len; 1042 network_pdu->flags = MESH_NETWORK_PDU_FLAGS_PROXY_CONFIGURATION; // Network PDU 1043 1044 // add to list and go 1045 btstack_linked_list_add_tail(&network_pdus_received, (btstack_linked_item_t *) network_pdu); 1046 mesh_network_run(); 1047 } 1048 1049 void mesh_network_send_pdu(mesh_network_pdu_t * network_pdu){ 1050 #ifdef LOG_NETWORK 1051 printf("TX-NetworkPDU (%p): ", network_pdu); 1052 printf_hexdump(network_pdu->data, network_pdu->len); 1053 printf("^^ into network_pdus_queued\n"); 1054 #endif 1055 1056 btstack_assert((network_pdu->len + (network_pdu->data[1] & 0x80 ? 8 : 4)) <= 29); 1057 btstack_assert(network_pdu->len >= 9); 1058 1059 // setup callback 1060 network_pdu->callback = &mesh_network_send_d; 1061 network_pdu->flags = 0; 1062 1063 // queue up 1064 btstack_linked_list_add_tail(&network_pdus_queued, (btstack_linked_item_t *) network_pdu); 1065 #ifdef LOG_NETWORK 1066 mesh_network_dump_network_pdus("network_pdus_queued", &network_pdus_queued); 1067 #endif 1068 1069 // go 1070 mesh_network_run(); 1071 } 1072 1073 void mesh_network_encrypt_proxy_configuration_message(mesh_network_pdu_t * network_pdu, void (* callback)(mesh_network_pdu_t * callback)){ 1074 printf("ProxyPDU(unencrypted): "); 1075 printf_hexdump(network_pdu->data, network_pdu->len); 1076 1077 // setup callback 1078 network_pdu->callback = callback; 1079 network_pdu->flags = MESH_NETWORK_PDU_FLAGS_PROXY_CONFIGURATION; 1080 1081 // queue up 1082 btstack_linked_list_add_tail(&network_pdus_queued, (btstack_linked_item_t *) network_pdu); 1083 1084 // go 1085 mesh_network_run(); 1086 } 1087 1088 /* 1089 * @brief Setup network pdu header 1090 * @param netkey_index 1091 * @param ctl 1092 * @param ttl 1093 * @param seq 1094 * @param dest 1095 */ 1096 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){ 1097 memset(network_pdu, 0, sizeof(mesh_network_pdu_t)); 1098 // set netkey_index 1099 network_pdu->netkey_index = netkey_index; 1100 // setup header 1101 network_pdu->data[network_pdu->len++] = (mesh_get_iv_index_for_tx() << 7) | nid; 1102 uint8_t ctl_ttl = (ctl << 7) | (ttl & 0x7f); 1103 network_pdu->data[network_pdu->len++] = ctl_ttl; 1104 big_endian_store_24(network_pdu->data, 2, seq); 1105 network_pdu->len += 3; 1106 big_endian_store_16(network_pdu->data, network_pdu->len, src); 1107 network_pdu->len += 2; 1108 big_endian_store_16(network_pdu->data, network_pdu->len, dest); 1109 network_pdu->len += 2; 1110 (void)memcpy(&network_pdu->data[network_pdu->len], transport_pdu_data, 1111 transport_pdu_len); 1112 network_pdu->len += transport_pdu_len; 1113 } 1114 1115 /* 1116 * @brief Setup network pdu header 1117 * @param netkey_index 1118 * @param ctl 1119 * @param ttl 1120 * @param seq 1121 * @param dest 1122 */ 1123 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){ 1124 // set netkey_index 1125 network_pdu->netkey_index = netkey_index; 1126 // setup header 1127 network_pdu->data[0] = (mesh_get_iv_index_for_tx() << 7) | nid; 1128 uint8_t ctl_ttl = (ctl << 7) | (ttl & 0x7f); 1129 network_pdu->data[1] = ctl_ttl; 1130 big_endian_store_24(network_pdu->data, 2, seq); 1131 big_endian_store_16(network_pdu->data, 5, src); 1132 big_endian_store_16(network_pdu->data, 7, dest); 1133 } 1134 1135 // Network PDU Getter 1136 uint8_t mesh_network_nid(mesh_network_pdu_t * network_pdu){ 1137 return network_pdu->data[0] & 0x7f; 1138 } 1139 uint16_t mesh_network_control(mesh_network_pdu_t * network_pdu){ 1140 return network_pdu->data[1] & 0x80; 1141 } 1142 uint8_t mesh_network_ttl(mesh_network_pdu_t * network_pdu){ 1143 return network_pdu->data[1] & 0x7f; 1144 } 1145 uint32_t mesh_network_seq(mesh_network_pdu_t * network_pdu){ 1146 return big_endian_read_24(network_pdu->data, 2); 1147 } 1148 uint16_t mesh_network_src(mesh_network_pdu_t * network_pdu){ 1149 return big_endian_read_16(network_pdu->data, 5); 1150 } 1151 uint16_t mesh_network_dst(mesh_network_pdu_t * network_pdu){ 1152 return big_endian_read_16(network_pdu->data, 7); 1153 } 1154 int mesh_network_segmented(mesh_network_pdu_t * network_pdu){ 1155 return network_pdu->data[9] & 0x80; 1156 } 1157 uint8_t mesh_network_control_opcode(mesh_network_pdu_t * network_pdu){ 1158 return network_pdu->data[9] & 0x7f; 1159 } 1160 uint8_t * mesh_network_pdu_data(mesh_network_pdu_t * network_pdu){ 1161 return &network_pdu->data[9]; 1162 } 1163 uint8_t mesh_network_pdu_len(mesh_network_pdu_t * network_pdu){ 1164 return network_pdu->len - 9; 1165 } 1166 1167 void mesh_network_pdu_set_seq(mesh_network_pdu_t * network_pdu, uint32_t seq){ 1168 big_endian_store_24(network_pdu->data, 2, seq); 1169 } 1170 1171 static void mesh_network_dump_network_pdu(mesh_network_pdu_t * network_pdu){ 1172 if (network_pdu){ 1173 printf("- %p: ", network_pdu); printf_hexdump(network_pdu->data, network_pdu->len); 1174 } 1175 } 1176 static void mesh_network_dump_network_pdus(const char * name, btstack_linked_list_t * list){ 1177 printf("List: %s:\n", name); 1178 btstack_linked_list_iterator_t it; 1179 btstack_linked_list_iterator_init(&it, list); 1180 while (btstack_linked_list_iterator_has_next(&it)){ 1181 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t*) btstack_linked_list_iterator_next(&it); 1182 mesh_network_dump_network_pdu(network_pdu); 1183 } 1184 } 1185 static void mesh_network_reset_network_pdus(btstack_linked_list_t * list){ 1186 while (!btstack_linked_list_empty(list)){ 1187 mesh_network_pdu_t * pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(list); 1188 btstack_memory_mesh_network_pdu_free(pdu); 1189 } 1190 } 1191 void mesh_network_dump(void){ 1192 mesh_network_dump_network_pdus("network_pdus_received", &network_pdus_received); 1193 mesh_network_dump_network_pdus("network_pdus_queued", &network_pdus_queued); 1194 mesh_network_dump_network_pdus("network_pdus_outgoing_gatt", &network_pdus_outgoing_gatt); 1195 mesh_network_dump_network_pdus("network_pdus_outgoing_adv", &network_pdus_outgoing_adv); 1196 printf("outgoing_pdu: \n"); 1197 mesh_network_dump_network_pdu(outgoing_pdu); 1198 printf("incoming_pdu_raw: \n"); 1199 mesh_network_dump_network_pdu(incoming_pdu_raw); 1200 #ifdef ENABLE_MESH_GATT_BEARER 1201 printf("gatt_bearer_network_pdu: \n"); 1202 mesh_network_dump_network_pdu(gatt_bearer_network_pdu); 1203 #endif 1204 #ifdef ENABLE_MESH_ADV_BEARER 1205 printf("adv_bearer_network_pdu: \n"); 1206 mesh_network_dump_network_pdu(adv_bearer_network_pdu); 1207 #endif 1208 1209 } 1210 void mesh_network_reset(void){ 1211 mesh_network_reset_network_pdus(&network_pdus_received); 1212 mesh_network_reset_network_pdus(&network_pdus_queued); 1213 mesh_network_reset_network_pdus(&network_pdus_outgoing_gatt); 1214 mesh_network_reset_network_pdus(&network_pdus_outgoing_adv); 1215 1216 // outgoing network pdus are owned by higher layer, so we don't free: 1217 // - adv_bearer_network_pdu 1218 // - gatt_bearer_network_pdu 1219 // - outoing_pdu 1220 #ifdef ENABLE_MESH_ADV_BEARER 1221 adv_bearer_network_pdu = NULL; 1222 #endif 1223 #ifdef ENABLE_MESH_GATT_BEARER 1224 gatt_bearer_network_pdu = NULL; 1225 #endif 1226 outgoing_pdu = NULL; 1227 1228 if (incoming_pdu_raw){ 1229 mesh_network_pdu_free(incoming_pdu_raw); 1230 incoming_pdu_raw = NULL; 1231 } 1232 if (incoming_pdu_decoded){ 1233 mesh_network_pdu_free(incoming_pdu_decoded); 1234 incoming_pdu_decoded = NULL; 1235 } 1236 mesh_crypto_active = 0; 1237 } 1238 1239 // buffer pool 1240 mesh_network_pdu_t * mesh_network_pdu_get(void){ 1241 mesh_network_pdu_t * network_pdu = btstack_memory_mesh_network_pdu_get(); 1242 if (network_pdu) { 1243 memset(network_pdu, 0, sizeof(mesh_network_pdu_t)); 1244 network_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_NETWORK; 1245 } 1246 return network_pdu; 1247 } 1248 1249 void mesh_network_pdu_free(mesh_network_pdu_t * network_pdu){ 1250 btstack_memory_mesh_network_pdu_free(network_pdu); 1251 } 1252 1253 // Mesh Subnet Management 1254 1255 void mesh_subnet_add(mesh_subnet_t * subnet){ 1256 btstack_linked_list_add_tail(&subnets, (btstack_linked_item_t *) subnet); 1257 } 1258 1259 void mesh_subnet_remove(mesh_subnet_t * subnet){ 1260 btstack_linked_list_remove(&subnets, (btstack_linked_item_t *) subnet); 1261 } 1262 1263 mesh_subnet_t * mesh_subnet_get_by_netkey_index(uint16_t netkey_index){ 1264 btstack_linked_list_iterator_t it; 1265 btstack_linked_list_iterator_init(&it, &subnets); 1266 while (btstack_linked_list_iterator_has_next(&it)){ 1267 mesh_subnet_t * item = (mesh_subnet_t *) btstack_linked_list_iterator_next(&it); 1268 if (item->netkey_index == netkey_index) return item; 1269 } 1270 return NULL; 1271 } 1272 1273 int mesh_subnet_list_count(void){ 1274 return btstack_linked_list_count(&subnets); 1275 } 1276 1277 // mesh network key iterator over all keys 1278 void mesh_subnet_iterator_init(mesh_subnet_iterator_t *it){ 1279 btstack_linked_list_iterator_init(&it->it, &subnets); 1280 } 1281 1282 int mesh_subnet_iterator_has_more(mesh_subnet_iterator_t *it){ 1283 return btstack_linked_list_iterator_has_next(&it->it); 1284 } 1285 1286 mesh_subnet_t * mesh_subnet_iterator_get_next(mesh_subnet_iterator_t *it){ 1287 return (mesh_subnet_t *) btstack_linked_list_iterator_next(&it->it); 1288 } 1289 1290 mesh_network_key_t * mesh_subnet_get_outgoing_network_key(mesh_subnet_t * subnet){ 1291 switch (subnet->key_refresh){ 1292 case MESH_KEY_REFRESH_SECOND_PHASE: 1293 return subnet->new_key; 1294 case MESH_KEY_REFRESH_NOT_ACTIVE: 1295 case MESH_KEY_REFRESH_FIRST_PHASE: 1296 default: 1297 return subnet->old_key; 1298 } 1299 } 1300 1301 /** 1302 * @brief Setup subnet for given netkey index 1303 */ 1304 void mesh_subnet_setup_for_netkey_index(uint16_t netkey_index){ 1305 mesh_subnet_t * subnet = mesh_subnet_get_by_netkey_index(netkey_index); 1306 if (subnet != NULL) return; 1307 1308 // find old / new keys 1309 mesh_network_key_t * old_key = NULL; 1310 mesh_network_key_t * new_key = NULL; 1311 mesh_network_key_iterator_t it; 1312 mesh_network_key_iterator_init(&it); 1313 while (mesh_network_key_iterator_has_more(&it)){ 1314 mesh_network_key_t * network_key = mesh_network_key_iterator_get_next(&it); 1315 if (network_key->netkey_index != netkey_index) continue; 1316 if (old_key == NULL){ 1317 old_key = network_key; 1318 continue; 1319 } 1320 // assign current key depending on key version 1321 if (((int8_t) (network_key->version - new_key->version)) > 0) { 1322 new_key = network_key; 1323 } else { 1324 new_key = old_key; 1325 old_key = network_key; 1326 } 1327 } 1328 1329 // create subnet for netkey index 1330 subnet = btstack_memory_mesh_subnet_get(); 1331 if (subnet == NULL) return; 1332 subnet->netkey_index = netkey_index; 1333 mesh_subnet_add(subnet); 1334 1335 // set keys 1336 subnet->old_key = old_key; 1337 subnet->new_key = new_key; 1338 1339 // key refresh 1340 if (new_key == NULL){ 1341 // single key -> key refresh not active 1342 subnet->key_refresh = MESH_KEY_REFRESH_NOT_ACTIVE; 1343 } 1344 else { 1345 // two keys -> at least phase 1 1346 subnet->key_refresh = MESH_KEY_REFRESH_FIRST_PHASE; 1347 } 1348 } 1349