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 // register for freed network pdu 143 void (*mesh_network_free_pdu_callback)(void); 144 145 // prototypes 146 147 static void mesh_network_run(void); 148 static void process_network_pdu_validate(void); 149 150 // network caching 151 static uint32_t mesh_network_cache_hash(mesh_network_pdu_t * network_pdu){ 152 // - The SEQ field is a 24-bit integer that when combined with the IV Index, 153 // shall be a unique value for each new Network PDU originated by this node (=> SRC) 154 // - IV updates only rarely 155 // => 16 bit SRC, 1 bit IVI, 15 bit SEQ 156 uint8_t ivi = network_pdu->data[0] >> 7; 157 uint16_t seq = big_endian_read_16(network_pdu->data, 3); 158 uint16_t src = big_endian_read_16(network_pdu->data, 5); 159 return (src << 16) | (ivi << 15) | (seq & 0x7fff); 160 } 161 162 static int mesh_network_cache_find(uint32_t hash){ 163 int i; 164 for (i = 0; i < MESH_NETWORK_CACHE_SIZE; i++) { 165 if (mesh_network_cache[i] == hash) { 166 return 1; 167 } 168 } 169 return 0; 170 } 171 172 static void mesh_network_cache_add(uint32_t hash){ 173 mesh_network_cache[mesh_network_cache_index++] = hash; 174 if (mesh_network_cache_index >= MESH_NETWORK_CACHE_SIZE){ 175 mesh_network_cache_index = 0; 176 } 177 } 178 179 // common helper 180 int mesh_network_address_unicast(uint16_t addr){ 181 return addr != MESH_ADDRESS_UNSASSIGNED && (addr < 0x8000); 182 } 183 184 int mesh_network_address_virtual(uint16_t addr){ 185 return (addr & 0xC000) == 0x8000; // 0b10xx xxxx xxxx xxxx 186 } 187 188 int mesh_network_address_group(uint16_t addr){ 189 return (addr & 0xC000) == 0xC000; // 0b11xx xxxx xxxx xxxx 190 } 191 192 int mesh_network_address_all_proxies(uint16_t addr){ 193 return addr == MESH_ADDRESS_ALL_PROXIES; 194 } 195 196 int mesh_network_address_all_nodes(uint16_t addr){ 197 return addr == MESH_ADDRESS_ALL_NODES; 198 } 199 200 int mesh_network_address_all_friends(uint16_t addr){ 201 return addr == MESH_ADDRESS_ALL_FRIENDS; 202 } 203 204 int mesh_network_address_all_relays(uint16_t addr){ 205 return addr == MESH_ADDRESS_ALL_RELAYS; 206 } 207 208 int mesh_network_addresses_valid(uint8_t ctl, uint16_t src, uint16_t dst){ 209 // printf("CTL: %u\n", ctl); 210 // printf("SRC: %04x\n", src); 211 // printf("DST: %04x\n", dst); 212 if (src == 0){ 213 // printf("SRC Unassigned Addr -> ignore\n"); 214 return 0; 215 } 216 if ((src & 0xC000) == 0x8000){ 217 // printf("SRC Virtual Addr -> ignore\n"); 218 return 0; 219 } 220 if ((src & 0xC000) == 0xC000){ 221 // printf("SRC Group Addr -> ignore\n"); 222 return 0; 223 } 224 if (dst == 0){ 225 // printf("DST Unassigned Addr -> ignore\n"); 226 return 0; 227 } 228 if ( ((dst & 0xC000) == 0x8000) && (ctl == 1)){ 229 // printf("DST Virtual Addr in CONTROL -> ignore\n"); 230 return 0; 231 } 232 if ( (0xFF00 <= dst) && (dst <= 0xfffb) && (ctl == 0) ){ 233 // printf("DST RFU Group Addr in MESSAGE -> ignore\n"); 234 return 0; 235 } 236 // printf("SRC + DST Addr valid\n"); 237 return 1; 238 } 239 240 static void mesh_network_create_nonce(uint8_t * nonce, const mesh_network_pdu_t * pdu, uint32_t iv_index){ 241 unsigned int pos = 0; 242 nonce[pos++] = 0x0; // Network Nonce 243 (void)memcpy(&nonce[pos], &pdu->data[1], 6); 244 pos += 6; 245 big_endian_store_16(nonce, pos, 0); 246 pos += 2; 247 big_endian_store_32(nonce, pos, iv_index); 248 } 249 250 static void mesh_proxy_create_nonce(uint8_t * nonce, const mesh_network_pdu_t * pdu, uint32_t iv_index){ 251 unsigned int pos = 0; 252 nonce[pos++] = 0x3; // Proxy Nonce 253 nonce[pos++] = 0; 254 (void)memcpy(&nonce[pos], &pdu->data[2], 5); 255 pos += 5; 256 big_endian_store_16(nonce, pos, 0); 257 pos += 2; 258 big_endian_store_32(nonce, pos, iv_index); 259 } 260 261 // NID/IVI | obfuscated (CTL/TTL, SEQ (24), SRC (16) ), encrypted ( DST(16), TransportPDU), MIC(32 or 64) 262 263 static void mesh_network_send_complete(mesh_network_pdu_t * network_pdu){ 264 if (network_pdu->flags & MESH_NETWORK_PDU_FLAGS_RELAY){ 265 #ifdef LOG_NETWORK 266 printf("TX-F-NetworkPDU (%p): relay -> free packet\n", network_pdu); 267 #endif 268 mesh_network_pdu_free(network_pdu); 269 } else { 270 #ifdef LOG_NETWORK 271 printf("TX-F-NetworkPDU (%p): notify lower transport\n", network_pdu); 272 #endif 273 // notify higher layer 274 (*mesh_network_higher_layer_handler)(MESH_NETWORK_PDU_SENT, network_pdu); 275 } 276 } 277 278 static void mesh_network_send_d(mesh_network_pdu_t * network_pdu){ 279 280 #ifdef LOG_NETWORK 281 printf("TX-D-NetworkPDU (%p): ", network_pdu); 282 printf_hexdump(network_pdu->data, network_pdu->len); 283 #endif 284 285 // add to queue 286 btstack_linked_list_add_tail(&network_pdus_outgoing_gatt, (btstack_linked_item_t *) network_pdu); 287 288 // go 289 mesh_network_run(); 290 } 291 292 // new 293 static void mesh_network_send_c(void *arg){ 294 UNUSED(arg); 295 296 // obfuscate 297 unsigned int i; 298 for (i=0;i<6;i++){ 299 outgoing_pdu->data[1+i] ^= obfuscation_block[i]; 300 } 301 302 #ifdef LOG_NETWORK 303 printf("TX-C-NetworkPDU (%p): ", outgoing_pdu); 304 printf_hexdump(outgoing_pdu->data, outgoing_pdu->len); 305 #endif 306 307 // crypto done 308 mesh_crypto_active = 0; 309 310 // done 311 mesh_network_pdu_t * network_pdu = outgoing_pdu; 312 outgoing_pdu = NULL; 313 314 if ((network_pdu->flags & MESH_NETWORK_PDU_FLAGS_PROXY_CONFIGURATION) != 0){ 315 // encryption requested by mesh_network_encrypt_proxy_configuration_message 316 (*mesh_network_proxy_message_handler)(MESH_NETWORK_PDU_ENCRYPTED, network_pdu); 317 return; 318 } 319 320 #ifdef LOG_NETWORK 321 printf("TX-D-NetworkPDU (%p): ", network_pdu); 322 printf_hexdump(network_pdu->data, network_pdu->len); 323 #endif 324 325 // add to queue 326 btstack_linked_list_add_tail(&network_pdus_outgoing_gatt, (btstack_linked_item_t *) network_pdu); 327 328 // go 329 mesh_network_run(); 330 } 331 332 static void mesh_network_send_b(void *arg){ 333 UNUSED(arg); 334 335 uint32_t iv_index = mesh_get_iv_index_for_tx(); 336 337 // store NetMIC 338 uint8_t net_mic[8]; 339 btstack_crypto_ccm_get_authentication_value(&mesh_network_crypto_request.ccm, net_mic); 340 341 // store MIC 342 uint8_t net_mic_len = outgoing_pdu->data[1] & 0x80 ? 8 : 4; 343 (void)memcpy(&outgoing_pdu->data[outgoing_pdu->len], net_mic, net_mic_len); 344 outgoing_pdu->len += net_mic_len; 345 346 btstack_assert(outgoing_pdu->len <= 29); 347 348 #ifdef LOG_NETWORK 349 printf("TX-B-NetworkPDU (%p): ", outgoing_pdu); 350 printf_hexdump(outgoing_pdu->data, outgoing_pdu->len); 351 #endif 352 353 // calc PECB 354 memset(encryption_block, 0, 5); 355 big_endian_store_32(encryption_block, 5, iv_index); 356 (void)memcpy(&encryption_block[9], &outgoing_pdu->data[7], 7); 357 btstack_crypto_aes128_encrypt(&mesh_network_crypto_request.aes128, current_network_key->privacy_key, encryption_block, obfuscation_block, &mesh_network_send_c, NULL); 358 } 359 360 static void mesh_network_send_a(void){ 361 362 mesh_crypto_active = 1; 363 364 uint32_t iv_index = mesh_get_iv_index_for_tx(); 365 366 // lookup subnet by netkey_index 367 mesh_subnet_t * subnet = mesh_subnet_get_by_netkey_index(outgoing_pdu->netkey_index); 368 if (!subnet) { 369 mesh_crypto_active = 0; 370 mesh_network_pdu_t * network_pdu = outgoing_pdu; 371 outgoing_pdu = NULL; 372 // notify upper layer 373 mesh_network_send_complete(network_pdu); 374 // run again 375 mesh_network_run(); 376 return; 377 } 378 379 // get network key to use for sending 380 current_network_key = mesh_subnet_get_outgoing_network_key(subnet); 381 382 #ifdef LOG_NETWORK 383 printf("TX-A-NetworkPDU (%p): ", outgoing_pdu); 384 printf_hexdump(outgoing_pdu->data, outgoing_pdu->len); 385 #endif 386 387 // get network nonce 388 if (outgoing_pdu->flags & MESH_NETWORK_PDU_FLAGS_PROXY_CONFIGURATION){ 389 mesh_proxy_create_nonce(network_nonce, outgoing_pdu, iv_index); 390 #ifdef LOG_NETWORK 391 printf("TX-ProxyNonce: "); 392 printf_hexdump(network_nonce, 13); 393 #endif 394 } else { 395 mesh_network_create_nonce(network_nonce, outgoing_pdu, iv_index); 396 #ifdef LOG_NETWORK 397 printf("TX-NetworkNonce: "); 398 printf_hexdump(network_nonce, 13); 399 #endif 400 } 401 402 #ifdef LOG_NETWORK 403 printf("TX-EncryptionKey: "); 404 printf_hexdump(current_network_key->encryption_key, 16); 405 #endif 406 407 // start ccm 408 uint8_t cypher_len = outgoing_pdu->len - 7; 409 uint8_t net_mic_len = outgoing_pdu->data[1] & 0x80 ? 8 : 4; 410 btstack_crypto_ccm_init(&mesh_network_crypto_request.ccm, current_network_key->encryption_key, network_nonce, cypher_len, 0, net_mic_len); 411 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); 412 } 413 414 #if defined(ENABLE_MESH_RELAY) || defined (ENABLE_MESH_PROXY_SERVER) 415 static void mesh_network_relay_message(mesh_network_pdu_t * network_pdu){ 416 417 uint8_t ctl_ttl = network_pdu->data[1]; 418 uint8_t ctl_in_bit_7 = ctl_ttl & 0x80; 419 uint8_t ttl = ctl_ttl & 0x7f; 420 421 #ifdef LOG_NETWORK 422 printf("TX-Relay-NetworkPDU (%p): ", network_pdu); 423 printf_hexdump(network_pdu->data, network_pdu->len); 424 printf("^^ into network_pdus_queued\n"); 425 #endif 426 427 // prepare pdu for resending 428 network_pdu->data[1] = ctl_in_bit_7 | (ttl - 1); 429 network_pdu->flags |= MESH_NETWORK_PDU_FLAGS_RELAY; 430 431 // queue up 432 btstack_linked_list_add_tail(&network_pdus_queued, (btstack_linked_item_t *) network_pdu); 433 } 434 #endif 435 436 void mesh_network_message_processed_by_higher_layer(mesh_network_pdu_t * network_pdu){ 437 438 #if defined(ENABLE_MESH_RELAY) || defined (ENABLE_MESH_PROXY_SERVER) 439 440 // check if address does not matches elements on our node and TTL >= 2 441 uint16_t src = mesh_network_src(network_pdu); 442 uint8_t ttl = mesh_network_ttl(network_pdu); 443 444 uint16_t mesh_network_primary_address = mesh_node_get_primary_element_address(); 445 446 if (((src < mesh_network_primary_address) || (src > (mesh_network_primary_address + mesh_node_element_count()))) && (ttl >= 2)){ 447 448 if ((network_pdu->flags & MESH_NETWORK_PDU_FLAGS_GATT_BEARER) == 0){ 449 450 // message received via ADV bearer are relayed: 451 452 #ifdef ENABLE_MESH_RELAY 453 if (mesh_foundation_relay_get() != 0){ 454 // - to ADV bearer, if Relay supported and enabledx 455 mesh_network_relay_message(network_pdu); 456 mesh_network_run(); 457 return; 458 } 459 #endif 460 461 #ifdef ENABLE_MESH_PROXY_SERVER 462 if (mesh_foundation_gatt_proxy_get() != 0){ 463 // - to GATT bearer, if Proxy supported and enabled 464 mesh_network_relay_message(network_pdu); 465 mesh_network_run(); 466 return; 467 } 468 #endif 469 470 } else { 471 472 // messages received via GATT bearer are relayed: 473 474 #ifdef ENABLE_MESH_PROXY_SERVER 475 if (mesh_foundation_gatt_proxy_get() != 0){ 476 // - to ADV bearer, if Proxy supported and enabled 477 mesh_network_relay_message(network_pdu); 478 mesh_network_run(); 479 return; 480 } 481 #endif 482 483 } 484 } 485 #endif 486 487 // otherwise, we're done 488 btstack_memory_mesh_network_pdu_free(network_pdu); 489 } 490 491 static void process_network_pdu_done(void){ 492 btstack_memory_mesh_network_pdu_free(incoming_pdu_raw); 493 incoming_pdu_raw = NULL; 494 mesh_crypto_active = 0; 495 496 mesh_network_run(); 497 } 498 499 static void process_network_pdu_validate_d(void * arg){ 500 UNUSED(arg); 501 // mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) arg; 502 503 uint8_t ctl_ttl = incoming_pdu_decoded->data[1]; 504 uint8_t ctl = ctl_ttl >> 7; 505 uint8_t net_mic_len = (ctl_ttl & 0x80) ? 8 : 4; 506 507 // store NetMIC 508 uint8_t net_mic[8]; 509 btstack_crypto_ccm_get_authentication_value(&mesh_network_crypto_request.ccm, net_mic); 510 #ifdef LOG_NETWORK 511 printf("RX-NetMIC (%p): ", incoming_pdu_decoded); 512 printf_hexdump(net_mic, net_mic_len); 513 #endif 514 // store in decoded pdu 515 (void)memcpy(&incoming_pdu_decoded->data[incoming_pdu_decoded->len - net_mic_len], 516 net_mic, net_mic_len); 517 518 #ifdef LOG_NETWORK 519 uint8_t cypher_len = incoming_pdu_decoded->len - 9 - net_mic_len; 520 printf("RX-Decrypted DST/TransportPDU (%p): ", incoming_pdu_decoded); 521 printf_hexdump(&incoming_pdu_decoded->data[7], 2 + cypher_len); 522 523 printf("RX-Decrypted: "); 524 printf_hexdump(incoming_pdu_decoded->data, incoming_pdu_decoded->len); 525 #endif 526 527 // validate network mic 528 if (memcmp(net_mic, &incoming_pdu_raw->data[incoming_pdu_decoded->len-net_mic_len], net_mic_len) != 0){ 529 // fail 530 printf("RX-NetMIC mismatch, try next key (%p)\n", incoming_pdu_decoded); 531 process_network_pdu_validate(); 532 return; 533 } 534 535 // remove NetMIC from payload 536 incoming_pdu_decoded->len -= net_mic_len; 537 538 #ifdef LOG_NETWORK 539 // match 540 printf("RX-NetMIC matches (%p)\n", incoming_pdu_decoded); 541 printf("RX-TTL (%p): 0x%02x\n", incoming_pdu_decoded, incoming_pdu_decoded->data[1] & 0x7f); 542 #endif 543 544 // set netkey_index 545 incoming_pdu_decoded->netkey_index = current_network_key->netkey_index; 546 547 if (incoming_pdu_decoded->flags & MESH_NETWORK_PDU_FLAGS_PROXY_CONFIGURATION){ 548 549 mesh_network_pdu_t * decoded_pdu = incoming_pdu_decoded; 550 incoming_pdu_decoded = NULL; 551 552 // no additional checks for proxy messages 553 (*mesh_network_proxy_message_handler)(MESH_NETWORK_PDU_RECEIVED, decoded_pdu); 554 555 } else { 556 557 // validate src/dest addresses 558 uint16_t src = big_endian_read_16(incoming_pdu_decoded->data, 5); 559 uint16_t dst = big_endian_read_16(incoming_pdu_decoded->data, 7); 560 int valid = mesh_network_addresses_valid(ctl, src, dst); 561 if (!valid){ 562 #ifdef LOG_NETWORK 563 printf("RX Address invalid (%p)\n", incoming_pdu_decoded); 564 #endif 565 btstack_memory_mesh_network_pdu_free(incoming_pdu_decoded); 566 incoming_pdu_decoded = NULL; 567 process_network_pdu_done(); 568 return; 569 } 570 571 // check cache 572 uint32_t hash = mesh_network_cache_hash(incoming_pdu_decoded); 573 #ifdef LOG_NETWORK 574 printf("RX-Hash (%p): %08x\n", incoming_pdu_decoded, hash); 575 #endif 576 if (mesh_network_cache_find(hash)){ 577 // found in cache, drop 578 #ifdef LOG_NETWORK 579 printf("Found in cache -> drop packet (%p)\n", incoming_pdu_decoded); 580 #endif 581 btstack_memory_mesh_network_pdu_free(incoming_pdu_decoded); 582 incoming_pdu_decoded = NULL; 583 process_network_pdu_done(); 584 return; 585 } 586 587 // store in network cache 588 mesh_network_cache_add(hash); 589 590 #ifdef LOG_NETWORK 591 printf("RX-Validated (%p) - forward to lower transport\n", incoming_pdu_decoded); 592 #endif 593 594 // forward to lower transport layer. message is freed by call to mesh_network_message_processed_by_upper_layer 595 mesh_network_pdu_t * decoded_pdu = incoming_pdu_decoded; 596 incoming_pdu_decoded = NULL; 597 (*mesh_network_higher_layer_handler)(MESH_NETWORK_PDU_RECEIVED, decoded_pdu); 598 } 599 600 // done 601 process_network_pdu_done(); 602 } 603 604 static uint32_t iv_index_for_pdu(const mesh_network_pdu_t * network_pdu){ 605 // get IV Index and IVI 606 uint32_t iv_index = mesh_get_iv_index(); 607 int ivi = network_pdu->data[0] >> 7; 608 609 // if least significant bit differs, use previous IV Index 610 if ((iv_index & 1 ) ^ ivi){ 611 iv_index--; 612 #ifdef LOG_NETWORK 613 printf("RX-IV: IVI indicates previous IV index, using 0x%08x\n", iv_index); 614 #endif 615 } 616 return iv_index; 617 } 618 619 static void process_network_pdu_validate_b(void * arg){ 620 UNUSED(arg); 621 622 #ifdef LOG_NETWORK 623 printf("RX-PECB: "); 624 printf_hexdump(obfuscation_block, 6); 625 #endif 626 627 // de-obfuscate 628 unsigned int i; 629 for (i=0;i<6;i++){ 630 incoming_pdu_decoded->data[1+i] = incoming_pdu_raw->data[1+i] ^ obfuscation_block[i]; 631 } 632 633 uint32_t iv_index = iv_index_for_pdu(incoming_pdu_raw); 634 635 if (incoming_pdu_decoded->flags & MESH_NETWORK_PDU_FLAGS_PROXY_CONFIGURATION){ 636 // create network nonce 637 mesh_proxy_create_nonce(network_nonce, incoming_pdu_decoded, iv_index); 638 #ifdef LOG_NETWORK 639 printf("RX-Proxy Nonce: "); 640 printf_hexdump(network_nonce, 13); 641 #endif 642 } else { 643 // create network nonce 644 mesh_network_create_nonce(network_nonce, incoming_pdu_decoded, iv_index); 645 #ifdef LOG_NETWORK 646 printf("RX-Network Nonce: "); 647 printf_hexdump(network_nonce, 13); 648 #endif 649 } 650 651 // 652 uint8_t ctl_ttl = incoming_pdu_decoded->data[1]; 653 uint8_t net_mic_len = (ctl_ttl & 0x80) ? 8 : 4; 654 uint8_t cypher_len = incoming_pdu_decoded->len - 7 - net_mic_len; 655 656 #ifdef LOG_NETWORK 657 printf("RX-Cyper len %u, mic len %u\n", cypher_len, net_mic_len); 658 659 printf("RX-Encryption Key: "); 660 printf_hexdump(current_network_key->encryption_key, 16); 661 662 #endif 663 664 btstack_crypto_ccm_init(&mesh_network_crypto_request.ccm, current_network_key->encryption_key, network_nonce, cypher_len, 0, net_mic_len); 665 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); 666 } 667 668 static void process_network_pdu_validate(void){ 669 if (!mesh_network_key_nid_iterator_has_more(&validation_network_key_it)){ 670 printf("No valid network key found\n"); 671 btstack_memory_mesh_network_pdu_free(incoming_pdu_decoded); 672 incoming_pdu_decoded = NULL; 673 process_network_pdu_done(); 674 return; 675 } 676 677 current_network_key = mesh_network_key_nid_iterator_get_next(&validation_network_key_it); 678 679 // calc PECB 680 uint32_t iv_index = iv_index_for_pdu(incoming_pdu_raw); 681 memset(encryption_block, 0, 5); 682 big_endian_store_32(encryption_block, 5, iv_index); 683 (void)memcpy(&encryption_block[9], &incoming_pdu_raw->data[7], 7); 684 btstack_crypto_aes128_encrypt(&mesh_network_crypto_request.aes128, current_network_key->privacy_key, encryption_block, obfuscation_block, &process_network_pdu_validate_b, NULL); 685 } 686 687 688 static void process_network_pdu(void){ 689 // 690 uint8_t nid_ivi = incoming_pdu_raw->data[0]; 691 692 // setup pdu object 693 incoming_pdu_decoded->data[0] = nid_ivi; 694 incoming_pdu_decoded->len = incoming_pdu_raw->len; 695 incoming_pdu_decoded->flags = incoming_pdu_raw->flags; 696 697 // init provisioning data iterator 698 uint8_t nid = nid_ivi & 0x7f; 699 // uint8_t iv_index = network_pdu_data[0] >> 7; 700 mesh_network_key_nid_iterator_init(&validation_network_key_it, nid); 701 702 process_network_pdu_validate(); 703 } 704 705 // returns true if done 706 static bool mesh_network_run_gatt(void){ 707 if (btstack_linked_list_empty(&network_pdus_outgoing_gatt)){ 708 return true; 709 } 710 711 #ifdef ENABLE_MESH_GATT_BEARER 712 if (gatt_bearer_network_pdu != NULL){ 713 return true; 714 } 715 716 // move to 'gatt bearer queue' 717 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_outgoing_gatt); 718 719 #ifdef LOG_NETWORK 720 printf("network run 1: pop %p from network_pdus_outgoing_gatt\n", network_pdu); 721 #endif 722 // request to send via gatt if: 723 // proxy active and connected 724 // packet wasn't received via gatt bearer 725 int send_via_gatt = ((mesh_foundation_gatt_proxy_get() != 0) && 726 (gatt_bearer_con_handle != HCI_CON_HANDLE_INVALID) && 727 ((network_pdu->flags & MESH_NETWORK_PDU_FLAGS_GATT_BEARER) == 0)); 728 if (send_via_gatt){ 729 730 #ifdef LOG_NETWORK 731 printf("network run 2: set %p as gatt_bearer_network_pdu\n", network_pdu); 732 #endif 733 gatt_bearer_network_pdu = network_pdu; 734 gatt_bearer_request_can_send_now_for_network_pdu(); 735 736 } else { 737 738 #ifdef LOG_NETWORK 739 printf("network run 3: push %p to network_pdus_outgoing_adv\n", network_pdu); 740 #endif 741 btstack_linked_list_add_tail(&network_pdus_outgoing_adv, (btstack_linked_item_t *) network_pdu); 742 743 #ifdef LOG_NETWORK 744 mesh_network_dump_network_pdus("network_pdus_outgoing_adv (1)", &network_pdus_outgoing_adv); 745 #endif 746 } 747 #else 748 // directly move to 'outgoing adv bearer queue' 749 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_outgoing_gatt); 750 btstack_linked_list_add_tail(&network_pdus_outgoing_adv, (btstack_linked_item_t *) network_pdu); 751 #endif 752 return false; 753 } 754 755 // returns true if done 756 static bool mesh_network_run_adv(void){ 757 758 if (btstack_linked_list_empty(&network_pdus_outgoing_adv)){ 759 return true; 760 } 761 762 #ifdef ENABLE_MESH_ADV_BEARER 763 if (adv_bearer_network_pdu != NULL){ 764 return true; 765 } 766 767 // move to 'adv bearer queue' 768 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_outgoing_adv); 769 770 #ifdef LOG_NETWORK 771 printf("network run 4: pop %p from network_pdus_outgoing_adv\n", network_pdu); 772 mesh_network_dump_network_pdus("network_pdus_outgoing_adv (3)", &network_pdus_outgoing_adv); 773 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()); 774 #endif 775 776 // send via adv if: 777 // packet was received via gatt bearer and proxy active, or, 778 // packet originated locally (== not relayed), or, 779 // packet was received via ADV bearer and relay is active, or, 780 int send_via_adv = (((network_pdu->flags & MESH_NETWORK_PDU_FLAGS_GATT_BEARER) != 0) && (mesh_foundation_gatt_proxy_get() == 1)) || 781 (((network_pdu->flags & MESH_NETWORK_PDU_FLAGS_GATT_BEARER) == 0) && (mesh_foundation_relay_get() == 1)) || 782 ((network_pdu->flags & MESH_NETWORK_PDU_FLAGS_RELAY) == 0); 783 784 if (send_via_adv){ 785 #ifdef LOG_NETWORK 786 printf("network run 6: set %p as to adv_bearer_network_pdu\n", network_pdu); 787 #endif 788 adv_bearer_network_pdu = network_pdu; 789 adv_bearer_request_can_send_now_for_network_pdu(); 790 } else { 791 #ifdef LOG_NETWORK 792 printf("network run 7: skip sending %p via adv bearer\n", network_pdu); 793 #endif 794 // directly notify upper layer 795 mesh_network_send_complete(network_pdu); 796 } 797 #else 798 // done 799 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_outgoing_adv); 800 // directly notify upper layer 801 mesh_network_send_complete(network_pdu); 802 #endif 803 return false; 804 } 805 806 // returns true if done 807 static bool mesh_network_run_received(void){ 808 if (mesh_crypto_active) { 809 return true; 810 } 811 812 if (btstack_linked_list_empty(&network_pdus_received)) { 813 return true; 814 } 815 816 incoming_pdu_decoded = mesh_network_pdu_get(); 817 if (incoming_pdu_decoded == NULL) return true; 818 819 // get encoded network pdu and start processing 820 mesh_crypto_active = 1; 821 incoming_pdu_raw = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_received); 822 process_network_pdu(); 823 return true; 824 } 825 826 // returns true if done 827 static bool mesh_network_run_queued(void){ 828 if (mesh_crypto_active) { 829 return true; 830 } 831 832 if (btstack_linked_list_empty(&network_pdus_queued)){ 833 return true; 834 } 835 836 // get queued network pdu and start processing 837 outgoing_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&network_pdus_queued); 838 839 #ifdef LOG_NETWORK 840 printf("network run 5: pop %p from network_pdus_queued\n", outgoing_pdu); 841 mesh_network_dump_network_pdus("network_pdus_queued (2)", &network_pdus_queued); 842 #endif 843 mesh_network_send_a(); 844 return true; 845 } 846 847 static void mesh_network_run(void){ 848 while (true){ 849 bool done = true; 850 done &= mesh_network_run_gatt(); 851 done &= mesh_network_run_adv(); 852 done &= mesh_network_run_received(); 853 done &= mesh_network_run_queued(); 854 if (done) break; 855 } 856 } 857 858 #ifdef ENABLE_MESH_ADV_BEARER 859 static void mesh_adv_bearer_handle_network_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 860 UNUSED(channel); 861 mesh_network_pdu_t * network_pdu; 862 uint8_t transmission_count; 863 uint16_t transmission_interval; 864 uint8_t transmit_config; 865 866 switch (packet_type){ 867 case MESH_NETWORK_PACKET: 868 // check len. minimal transport PDU len = 1, 32 bit NetMIC -> 13 bytes 869 if (size < 13) break; 870 871 #ifdef LOG_NETWORK 872 printf("received network pdu from adv (len %u): ", size); 873 printf_hexdump(packet, size); 874 #endif 875 mesh_network_received_message(packet, size, 0); 876 break; 877 878 case HCI_EVENT_PACKET: 879 switch(packet[0]){ 880 case HCI_EVENT_MESH_META: 881 switch(packet[2]){ 882 case MESH_SUBEVENT_CAN_SEND_NOW: 883 if (adv_bearer_network_pdu == NULL) break; 884 885 // Get Transmission config depending on relay flag 886 if (adv_bearer_network_pdu->flags & MESH_NETWORK_PDU_FLAGS_RELAY){ 887 transmit_config = mesh_foundation_relay_get(); 888 } else { 889 transmit_config = mesh_foundation_network_transmit_get(); 890 } 891 transmission_count = (transmit_config & 0x07) + 1; 892 transmission_interval = (transmit_config >> 3) * 10; 893 894 #ifdef LOG_NETWORK 895 printf("TX-E-NetworkPDU (%p) count %u, interval %u ms: ", adv_bearer_network_pdu, transmission_count, transmission_interval); 896 printf_hexdump(adv_bearer_network_pdu->data, adv_bearer_network_pdu->len); 897 #endif 898 899 adv_bearer_send_network_pdu(adv_bearer_network_pdu->data, adv_bearer_network_pdu->len, transmission_count, transmission_interval); 900 network_pdu = adv_bearer_network_pdu; 901 adv_bearer_network_pdu = NULL; 902 903 // notify upper layer 904 mesh_network_send_complete(network_pdu); 905 906 // check if more to send 907 mesh_network_run(); 908 break; 909 default: 910 break; 911 } 912 break; 913 default: 914 break; 915 } 916 break; 917 } 918 } 919 #endif 920 921 #ifdef ENABLE_MESH_GATT_BEARER 922 static void mesh_network_gatt_bearer_outgoing_complete(void){ 923 924 if (gatt_bearer_network_pdu == NULL) return; 925 926 // forward to adv bearer 927 btstack_linked_list_add_tail(&network_pdus_outgoing_adv, (btstack_linked_item_t*) gatt_bearer_network_pdu); 928 gatt_bearer_network_pdu = NULL; 929 930 mesh_network_run(); 931 return; 932 } 933 934 static void mesh_network_gatt_bearer_handle_network_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 935 UNUSED(channel); 936 switch (packet_type){ 937 case MESH_PROXY_DATA_PACKET: 938 if (mesh_foundation_gatt_proxy_get() == 0) break; 939 #ifdef LOG_NETWORK 940 printf("received network pdu from gatt (len %u): ", size); 941 printf_hexdump(packet, size); 942 #endif 943 mesh_network_received_message(packet, size, MESH_NETWORK_PDU_FLAGS_GATT_BEARER); 944 break; 945 case HCI_EVENT_PACKET: 946 switch (hci_event_packet_get_type(packet)){ 947 case HCI_EVENT_MESH_META: 948 switch (hci_event_mesh_meta_get_subevent_code(packet)){ 949 case MESH_SUBEVENT_PROXY_CONNECTED: 950 gatt_bearer_con_handle = mesh_subevent_proxy_connected_get_con_handle(packet); 951 break; 952 case MESH_SUBEVENT_PROXY_DISCONNECTED: 953 gatt_bearer_con_handle = HCI_CON_HANDLE_INVALID; 954 mesh_network_gatt_bearer_outgoing_complete(); 955 break; 956 case MESH_SUBEVENT_CAN_SEND_NOW: 957 if (gatt_bearer_network_pdu == NULL) break; 958 #ifdef LOG_NETWORK 959 printf("G-TX-E-NetworkPDU (%p): ", gatt_bearer_network_pdu); 960 printf_hexdump(gatt_bearer_network_pdu->data, gatt_bearer_network_pdu->len); 961 #endif 962 gatt_bearer_send_network_pdu(gatt_bearer_network_pdu->data, gatt_bearer_network_pdu->len); 963 break; 964 965 case MESH_SUBEVENT_MESSAGE_SENT: 966 mesh_network_gatt_bearer_outgoing_complete(); 967 break; 968 default: 969 break; 970 } 971 break; 972 default: 973 break; 974 } 975 break; 976 default: 977 break; 978 } 979 } 980 #endif 981 982 #ifdef ENABLE_MESH_GATT_BEARER 983 static void mesh_netework_gatt_bearer_handle_proxy_configuration(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 984 UNUSED(channel); 985 switch (packet_type){ 986 case MESH_PROXY_DATA_PACKET: 987 mesh_network_process_proxy_configuration_message(packet, size); 988 break; 989 case HCI_EVENT_PACKET: 990 switch (hci_event_packet_get_type(packet)){ 991 case HCI_EVENT_MESH_META: 992 switch (hci_event_mesh_meta_get_subevent_code(packet)){ 993 case MESH_SUBEVENT_CAN_SEND_NOW: 994 // forward to higher layer 995 (*mesh_network_proxy_message_handler)(MESH_NETWORK_CAN_SEND_NOW, NULL); 996 break; 997 default: 998 break; 999 } 1000 break; 1001 default: 1002 break; 1003 } 1004 break; 1005 default: 1006 break; 1007 } 1008 } 1009 #endif 1010 1011 void mesh_network_init(void){ 1012 #ifdef ENABLE_MESH_ADV_BEARER 1013 adv_bearer_register_for_network_pdu(&mesh_adv_bearer_handle_network_event); 1014 #endif 1015 #ifdef ENABLE_MESH_GATT_BEARER 1016 gatt_bearer_con_handle = HCI_CON_HANDLE_INVALID; 1017 gatt_bearer_register_for_network_pdu(&mesh_network_gatt_bearer_handle_network_event); 1018 gatt_bearer_register_for_mesh_proxy_configuration(&mesh_netework_gatt_bearer_handle_proxy_configuration); 1019 #endif 1020 } 1021 1022 void mesh_network_set_higher_layer_handler(void (*packet_handler)(mesh_network_callback_type_t callback_type, mesh_network_pdu_t * network_pdu)){ 1023 mesh_network_higher_layer_handler = packet_handler; 1024 } 1025 1026 void mesh_network_set_proxy_message_handler(void (*packet_handler)(mesh_network_callback_type_t callback_type, mesh_network_pdu_t * network_pdu)){ 1027 mesh_network_proxy_message_handler = packet_handler; 1028 } 1029 1030 void mesh_network_received_message(const uint8_t * pdu_data, uint8_t pdu_len, uint8_t flags){ 1031 // verify len 1032 if (pdu_len > 29) return; 1033 1034 // allocate network_pdu 1035 mesh_network_pdu_t * network_pdu = mesh_network_pdu_get(); 1036 if (!network_pdu) return; 1037 1038 // store data 1039 (void)memcpy(network_pdu->data, pdu_data, pdu_len); 1040 network_pdu->len = pdu_len; 1041 network_pdu->flags = flags; 1042 1043 // add to list and go 1044 btstack_linked_list_add_tail(&network_pdus_received, (btstack_linked_item_t *) network_pdu); 1045 mesh_network_run(); 1046 1047 } 1048 1049 void mesh_network_process_proxy_configuration_message(const uint8_t * pdu_data, uint8_t pdu_len){ 1050 // verify len 1051 if (pdu_len > 29) return; 1052 1053 // allocate network_pdu 1054 mesh_network_pdu_t * network_pdu = mesh_network_pdu_get(); 1055 if (!network_pdu) return; 1056 1057 // store data 1058 (void)memcpy(network_pdu->data, pdu_data, pdu_len); 1059 network_pdu->len = pdu_len; 1060 network_pdu->flags = MESH_NETWORK_PDU_FLAGS_PROXY_CONFIGURATION; // Network PDU 1061 1062 // add to list and go 1063 btstack_linked_list_add_tail(&network_pdus_received, (btstack_linked_item_t *) network_pdu); 1064 mesh_network_run(); 1065 } 1066 1067 void mesh_network_send_pdu(mesh_network_pdu_t * network_pdu){ 1068 #ifdef LOG_NETWORK 1069 printf("TX-NetworkPDU (%p): ", network_pdu); 1070 printf_hexdump(network_pdu->data, network_pdu->len); 1071 printf("^^ into network_pdus_queued\n"); 1072 #endif 1073 1074 btstack_assert((network_pdu->len + (network_pdu->data[1] & 0x80 ? 8 : 4)) <= 29); 1075 btstack_assert(network_pdu->len >= 9); 1076 1077 // setup callback 1078 network_pdu->flags = 0; 1079 1080 // queue up 1081 btstack_linked_list_add_tail(&network_pdus_queued, (btstack_linked_item_t *) network_pdu); 1082 #ifdef LOG_NETWORK 1083 mesh_network_dump_network_pdus("network_pdus_queued", &network_pdus_queued); 1084 #endif 1085 1086 // go 1087 mesh_network_run(); 1088 } 1089 static void mesh_network_encrypt_proxy_configuration_encrypted(mesh_network_pdu_t * network_pdu){ 1090 (*mesh_network_proxy_message_handler)(MESH_NETWORK_PDU_ENCRYPTED, network_pdu); 1091 } 1092 1093 void mesh_network_encrypt_proxy_configuration_message(mesh_network_pdu_t * network_pdu){ 1094 printf("ProxyPDU(unencrypted): "); 1095 printf_hexdump(network_pdu->data, network_pdu->len); 1096 1097 // setup callback 1098 network_pdu->flags = MESH_NETWORK_PDU_FLAGS_PROXY_CONFIGURATION; 1099 1100 // queue up 1101 btstack_linked_list_add_tail(&network_pdus_queued, (btstack_linked_item_t *) network_pdu); 1102 1103 // go 1104 mesh_network_run(); 1105 } 1106 1107 /* 1108 * @brief Setup network pdu header 1109 * @param netkey_index 1110 * @param ctl 1111 * @param ttl 1112 * @param seq 1113 * @param dest 1114 */ 1115 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){ 1116 // set netkey_index 1117 network_pdu->netkey_index = netkey_index; 1118 // setup header 1119 network_pdu->len = 0; 1120 network_pdu->data[network_pdu->len++] = (mesh_get_iv_index_for_tx() << 7) | nid; 1121 uint8_t ctl_ttl = (ctl << 7) | (ttl & 0x7f); 1122 network_pdu->data[network_pdu->len++] = ctl_ttl; 1123 big_endian_store_24(network_pdu->data, 2, seq); 1124 network_pdu->len += 3; 1125 big_endian_store_16(network_pdu->data, network_pdu->len, src); 1126 network_pdu->len += 2; 1127 big_endian_store_16(network_pdu->data, network_pdu->len, dest); 1128 network_pdu->len += 2; 1129 (void)memcpy(&network_pdu->data[network_pdu->len], transport_pdu_data, 1130 transport_pdu_len); 1131 network_pdu->len += transport_pdu_len; 1132 // zero rest of packet 1133 memset(&network_pdu->data[network_pdu->len], 0, MESH_NETWORK_PAYLOAD_MAX - transport_pdu_len); 1134 } 1135 1136 /* 1137 * @brief Setup network pdu header 1138 * @param netkey_index 1139 * @param ctl 1140 * @param ttl 1141 * @param seq 1142 * @param dest 1143 */ 1144 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){ 1145 // set netkey_index 1146 network_pdu->netkey_index = netkey_index; 1147 // setup header 1148 network_pdu->data[0] = (mesh_get_iv_index_for_tx() << 7) | nid; 1149 uint8_t ctl_ttl = (ctl << 7) | (ttl & 0x7f); 1150 network_pdu->data[1] = ctl_ttl; 1151 big_endian_store_24(network_pdu->data, 2, seq); 1152 big_endian_store_16(network_pdu->data, 5, src); 1153 big_endian_store_16(network_pdu->data, 7, dest); 1154 } 1155 1156 // Network PDU Getter 1157 uint8_t mesh_network_nid(mesh_network_pdu_t * network_pdu){ 1158 return network_pdu->data[0] & 0x7f; 1159 } 1160 uint16_t mesh_network_control(mesh_network_pdu_t * network_pdu){ 1161 return network_pdu->data[1] & 0x80; 1162 } 1163 uint8_t mesh_network_ttl(mesh_network_pdu_t * network_pdu){ 1164 return network_pdu->data[1] & 0x7f; 1165 } 1166 uint32_t mesh_network_seq(mesh_network_pdu_t * network_pdu){ 1167 return big_endian_read_24(network_pdu->data, 2); 1168 } 1169 uint16_t mesh_network_src(mesh_network_pdu_t * network_pdu){ 1170 return big_endian_read_16(network_pdu->data, 5); 1171 } 1172 uint16_t mesh_network_dst(mesh_network_pdu_t * network_pdu){ 1173 return big_endian_read_16(network_pdu->data, 7); 1174 } 1175 int mesh_network_segmented(mesh_network_pdu_t * network_pdu){ 1176 return network_pdu->data[9] & 0x80; 1177 } 1178 uint8_t mesh_network_control_opcode(mesh_network_pdu_t * network_pdu){ 1179 return network_pdu->data[9] & 0x7f; 1180 } 1181 uint8_t * mesh_network_pdu_data(mesh_network_pdu_t * network_pdu){ 1182 return &network_pdu->data[9]; 1183 } 1184 uint8_t mesh_network_pdu_len(mesh_network_pdu_t * network_pdu){ 1185 return network_pdu->len - 9; 1186 } 1187 1188 void mesh_network_pdu_set_seq(mesh_network_pdu_t * network_pdu, uint32_t seq){ 1189 big_endian_store_24(network_pdu->data, 2, seq); 1190 } 1191 1192 static void mesh_network_dump_network_pdu(mesh_network_pdu_t * network_pdu){ 1193 if (network_pdu){ 1194 printf("- %p: ", network_pdu); printf_hexdump(network_pdu->data, network_pdu->len); 1195 } 1196 } 1197 static void mesh_network_dump_network_pdus(const char * name, btstack_linked_list_t * list){ 1198 printf("List: %s:\n", name); 1199 btstack_linked_list_iterator_t it; 1200 btstack_linked_list_iterator_init(&it, list); 1201 while (btstack_linked_list_iterator_has_next(&it)){ 1202 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t*) btstack_linked_list_iterator_next(&it); 1203 mesh_network_dump_network_pdu(network_pdu); 1204 } 1205 } 1206 static void mesh_network_reset_network_pdus(btstack_linked_list_t * list){ 1207 while (!btstack_linked_list_empty(list)){ 1208 mesh_network_pdu_t * pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(list); 1209 btstack_memory_mesh_network_pdu_free(pdu); 1210 } 1211 } 1212 void mesh_network_dump(void){ 1213 mesh_network_dump_network_pdus("network_pdus_received", &network_pdus_received); 1214 mesh_network_dump_network_pdus("network_pdus_queued", &network_pdus_queued); 1215 mesh_network_dump_network_pdus("network_pdus_outgoing_gatt", &network_pdus_outgoing_gatt); 1216 mesh_network_dump_network_pdus("network_pdus_outgoing_adv", &network_pdus_outgoing_adv); 1217 printf("outgoing_pdu: \n"); 1218 mesh_network_dump_network_pdu(outgoing_pdu); 1219 printf("incoming_pdu_raw: \n"); 1220 mesh_network_dump_network_pdu(incoming_pdu_raw); 1221 #ifdef ENABLE_MESH_GATT_BEARER 1222 printf("gatt_bearer_network_pdu: \n"); 1223 mesh_network_dump_network_pdu(gatt_bearer_network_pdu); 1224 #endif 1225 #ifdef ENABLE_MESH_ADV_BEARER 1226 printf("adv_bearer_network_pdu: \n"); 1227 mesh_network_dump_network_pdu(adv_bearer_network_pdu); 1228 #endif 1229 1230 } 1231 void mesh_network_reset(void){ 1232 mesh_network_reset_network_pdus(&network_pdus_received); 1233 mesh_network_reset_network_pdus(&network_pdus_queued); 1234 mesh_network_reset_network_pdus(&network_pdus_outgoing_gatt); 1235 mesh_network_reset_network_pdus(&network_pdus_outgoing_adv); 1236 1237 // outgoing network pdus are owned by higher layer, so we don't free: 1238 // - adv_bearer_network_pdu 1239 // - gatt_bearer_network_pdu 1240 // - outoing_pdu 1241 #ifdef ENABLE_MESH_ADV_BEARER 1242 adv_bearer_network_pdu = NULL; 1243 #endif 1244 #ifdef ENABLE_MESH_GATT_BEARER 1245 gatt_bearer_network_pdu = NULL; 1246 #endif 1247 outgoing_pdu = NULL; 1248 1249 if (incoming_pdu_raw){ 1250 mesh_network_pdu_free(incoming_pdu_raw); 1251 incoming_pdu_raw = NULL; 1252 } 1253 if (incoming_pdu_decoded){ 1254 mesh_network_pdu_free(incoming_pdu_decoded); 1255 incoming_pdu_decoded = NULL; 1256 } 1257 mesh_crypto_active = 0; 1258 } 1259 1260 // buffer pool 1261 mesh_network_pdu_t * mesh_network_pdu_get(void){ 1262 mesh_network_pdu_t * network_pdu = btstack_memory_mesh_network_pdu_get(); 1263 if (network_pdu) { 1264 memset(network_pdu, 0, sizeof(mesh_network_pdu_t)); 1265 network_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_NETWORK; 1266 } 1267 return network_pdu; 1268 } 1269 1270 void mesh_network_pdu_free(mesh_network_pdu_t * network_pdu){ 1271 btstack_memory_mesh_network_pdu_free(network_pdu); 1272 if (mesh_network_free_pdu_callback!=NULL){ 1273 void (*callback)(void) = mesh_network_free_pdu_callback; 1274 mesh_network_free_pdu_callback= NULL; 1275 (*callback)(); 1276 } 1277 } 1278 1279 void mesh_network_notify_on_freed_pdu(void (*callback)(void)){ 1280 btstack_assert(mesh_network_free_pdu_callback == NULL); 1281 mesh_network_free_pdu_callback = callback; 1282 } 1283 1284 1285 // Mesh Subnet Management 1286 1287 void mesh_subnet_add(mesh_subnet_t * subnet){ 1288 btstack_linked_list_add_tail(&subnets, (btstack_linked_item_t *) subnet); 1289 } 1290 1291 void mesh_subnet_remove(mesh_subnet_t * subnet){ 1292 btstack_linked_list_remove(&subnets, (btstack_linked_item_t *) subnet); 1293 } 1294 1295 mesh_subnet_t * mesh_subnet_get_by_netkey_index(uint16_t netkey_index){ 1296 btstack_linked_list_iterator_t it; 1297 btstack_linked_list_iterator_init(&it, &subnets); 1298 while (btstack_linked_list_iterator_has_next(&it)){ 1299 mesh_subnet_t * item = (mesh_subnet_t *) btstack_linked_list_iterator_next(&it); 1300 if (item->netkey_index == netkey_index) return item; 1301 } 1302 return NULL; 1303 } 1304 1305 int mesh_subnet_list_count(void){ 1306 return btstack_linked_list_count(&subnets); 1307 } 1308 1309 // mesh network key iterator over all keys 1310 void mesh_subnet_iterator_init(mesh_subnet_iterator_t *it){ 1311 btstack_linked_list_iterator_init(&it->it, &subnets); 1312 } 1313 1314 int mesh_subnet_iterator_has_more(mesh_subnet_iterator_t *it){ 1315 return btstack_linked_list_iterator_has_next(&it->it); 1316 } 1317 1318 mesh_subnet_t * mesh_subnet_iterator_get_next(mesh_subnet_iterator_t *it){ 1319 return (mesh_subnet_t *) btstack_linked_list_iterator_next(&it->it); 1320 } 1321 1322 mesh_network_key_t * mesh_subnet_get_outgoing_network_key(mesh_subnet_t * subnet){ 1323 switch (subnet->key_refresh){ 1324 case MESH_KEY_REFRESH_SECOND_PHASE: 1325 return subnet->new_key; 1326 case MESH_KEY_REFRESH_NOT_ACTIVE: 1327 case MESH_KEY_REFRESH_FIRST_PHASE: 1328 default: 1329 return subnet->old_key; 1330 } 1331 } 1332 1333 /** 1334 * @brief Setup subnet for given netkey index 1335 */ 1336 void mesh_subnet_setup_for_netkey_index(uint16_t netkey_index){ 1337 mesh_subnet_t * subnet = mesh_subnet_get_by_netkey_index(netkey_index); 1338 if (subnet != NULL) return; 1339 1340 // find old / new keys 1341 mesh_network_key_t * old_key = NULL; 1342 mesh_network_key_t * new_key = NULL; 1343 mesh_network_key_iterator_t it; 1344 mesh_network_key_iterator_init(&it); 1345 while (mesh_network_key_iterator_has_more(&it)){ 1346 mesh_network_key_t * network_key = mesh_network_key_iterator_get_next(&it); 1347 if (network_key->netkey_index != netkey_index) continue; 1348 if (old_key == NULL){ 1349 old_key = network_key; 1350 continue; 1351 } 1352 // assign current key depending on key version 1353 if (((int8_t) (network_key->version - new_key->version)) > 0) { 1354 new_key = network_key; 1355 } else { 1356 new_key = old_key; 1357 old_key = network_key; 1358 } 1359 } 1360 1361 // create subnet for netkey index 1362 subnet = btstack_memory_mesh_subnet_get(); 1363 if (subnet == NULL) return; 1364 subnet->netkey_index = netkey_index; 1365 mesh_subnet_add(subnet); 1366 1367 // set keys 1368 subnet->old_key = old_key; 1369 subnet->new_key = new_key; 1370 1371 // key refresh 1372 if (new_key == NULL){ 1373 // single key -> key refresh not active 1374 subnet->key_refresh = MESH_KEY_REFRESH_NOT_ACTIVE; 1375 } 1376 else { 1377 // two keys -> at least phase 1 1378 subnet->key_refresh = MESH_KEY_REFRESH_FIRST_PHASE; 1379 } 1380 } 1381