1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "mesh_upper_transport.c" 39 40 #include "mesh/mesh_upper_transport.h" 41 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 46 #include "btstack_util.h" 47 #include "btstack_memory.h" 48 #include "btstack_debug.h" 49 50 #include "mesh/beacon.h" 51 #include "mesh/mesh_iv_index_seq_number.h" 52 #include "mesh/mesh_keys.h" 53 #include "mesh/mesh_lower_transport.h" 54 #include "mesh/mesh_peer.h" 55 #include "mesh/mesh_virtual_addresses.h" 56 57 // TODO: extract mesh_pdu functions into lower transport or network 58 #include "mesh/mesh_access.h" 59 60 // combined key x address iterator for upper transport decryption 61 62 typedef struct { 63 // state 64 mesh_transport_key_iterator_t key_it; 65 mesh_virtual_address_iterator_t address_it; 66 // elements 67 const mesh_transport_key_t * key; 68 const mesh_virtual_address_t * address; 69 // address - might be virtual 70 uint16_t dst; 71 // key info 72 } mesh_transport_key_and_virtual_address_iterator_t; 73 74 static void mesh_upper_transport_validate_segmented_message(void); 75 static void mesh_upper_transport_run(void); 76 77 static int crypto_active; 78 79 static mesh_access_pdu_t * incoming_access_pdu_encrypted; 80 static mesh_access_pdu_t * incoming_access_pdu_decrypted; 81 82 static mesh_access_pdu_t incoming_access_pdu_encrypted_singleton; 83 static mesh_access_pdu_t incoming_access_pdu_decrypted_singleton; 84 85 static mesh_control_pdu_t incoming_control_pdu_singleton; 86 static mesh_control_pdu_t * incoming_control_pdu; 87 88 static mesh_segmented_pdu_t outgoing_segmented_pdu_singleton; 89 static mesh_upper_transport_pdu_t * outgoing_upper_transport_pdu; 90 91 static uint8_t application_nonce[13]; 92 static btstack_crypto_ccm_t ccm; 93 static uint8_t crypto_buffer[MESH_ACCESS_PAYLOAD_MAX]; 94 static mesh_transport_key_and_virtual_address_iterator_t mesh_transport_key_it; 95 96 // upper transport callbacks - in access layer 97 static void (*mesh_access_message_handler)( mesh_transport_callback_type_t callback_type, mesh_transport_status_t status, mesh_pdu_t * pdu); 98 static void (*mesh_control_message_handler)( mesh_transport_callback_type_t callback_type, mesh_transport_status_t status, mesh_pdu_t * pdu); 99 100 // incoming unsegmented (network) and segmented (transport) control and access messages 101 static btstack_linked_list_t upper_transport_incoming; 102 103 // outgoing unsegmented (network) and segmented (uppert_transport_outgoing) control and access messages 104 static btstack_linked_list_t upper_transport_outgoing; 105 106 107 // TODO: higher layer define used for assert 108 #define MESH_ACCESS_OPCODE_NOT_SET 0xFFFFFFFEu 109 110 static void mesh_print_hex(const char * name, const uint8_t * data, uint16_t len){ 111 printf("%-20s ", name); 112 printf_hexdump(data, len); 113 } 114 // static void mesh_print_x(const char * name, uint32_t value){ 115 // printf("%20s: 0x%x", name, (int) value); 116 // } 117 118 static void mesh_transport_key_and_virtual_address_iterator_init(mesh_transport_key_and_virtual_address_iterator_t *it, 119 uint16_t dst, uint16_t netkey_index, uint8_t akf, 120 uint8_t aid) { 121 printf("KEY_INIT: dst %04x, akf %x, aid %x\n", dst, akf, aid); 122 // config 123 it->dst = dst; 124 // init elements 125 it->key = NULL; 126 it->address = NULL; 127 // init element iterators 128 mesh_transport_key_aid_iterator_init(&it->key_it, netkey_index, akf, aid); 129 // init address iterator 130 if (mesh_network_address_virtual(it->dst)){ 131 mesh_virtual_address_iterator_init(&it->address_it, dst); 132 // get first key 133 if (mesh_transport_key_aid_iterator_has_more(&it->key_it)) { 134 it->key = mesh_transport_key_aid_iterator_get_next(&it->key_it); 135 } 136 } 137 } 138 139 // cartesian product: keys x addressses 140 static int mesh_transport_key_and_virtual_address_iterator_has_more(mesh_transport_key_and_virtual_address_iterator_t * it){ 141 if (mesh_network_address_virtual(it->dst)) { 142 // find next valid entry 143 while (true){ 144 if (mesh_virtual_address_iterator_has_more(&it->address_it)) return 1; 145 if (!mesh_transport_key_aid_iterator_has_more(&it->key_it)) return 0; 146 // get next key 147 it->key = mesh_transport_key_aid_iterator_get_next(&it->key_it); 148 mesh_virtual_address_iterator_init(&it->address_it, it->dst); 149 } 150 } else { 151 return mesh_transport_key_aid_iterator_has_more(&it->key_it); 152 } 153 } 154 155 static void mesh_transport_key_and_virtual_address_iterator_next(mesh_transport_key_and_virtual_address_iterator_t * it){ 156 if (mesh_network_address_virtual(it->dst)) { 157 it->address = mesh_virtual_address_iterator_get_next(&it->address_it); 158 } else { 159 it->key = mesh_transport_key_aid_iterator_get_next(&it->key_it); 160 } 161 } 162 163 // UPPER TRANSPORT 164 165 uint16_t mesh_access_dst(mesh_access_pdu_t * access_pdu){ 166 return big_endian_read_16(access_pdu->network_header, 7); 167 } 168 169 uint16_t mesh_access_ctl(mesh_access_pdu_t * access_pdu){ 170 return access_pdu->network_header[1] >> 7; 171 } 172 173 uint32_t mesh_access_seq(mesh_access_pdu_t * access_pdu){ 174 return big_endian_read_24(access_pdu->network_header, 2); 175 } 176 177 void mesh_access_set_nid_ivi(mesh_access_pdu_t * access_pdu, uint8_t nid_ivi){ 178 access_pdu->network_header[0] = nid_ivi; 179 } 180 void mesh_access_set_ctl_ttl(mesh_access_pdu_t * access_pdu, uint8_t ctl_ttl){ 181 access_pdu->network_header[1] = ctl_ttl; 182 } 183 void mesh_access_set_seq(mesh_access_pdu_t * access_pdu, uint32_t seq){ 184 big_endian_store_24(access_pdu->network_header, 2, seq); 185 } 186 void mesh_access_set_src(mesh_access_pdu_t * access_pdu, uint16_t src){ 187 big_endian_store_16(access_pdu->network_header, 5, src); 188 } 189 void mesh_access_set_dest(mesh_access_pdu_t * access_pdu, uint16_t dest){ 190 big_endian_store_16(access_pdu->network_header, 7, dest); 191 } 192 193 static void mesh_segmented_pdu_flatten(btstack_linked_list_t * segments, uint8_t segment_len, uint8_t * buffer) { 194 // assemble payload 195 btstack_linked_list_iterator_t it; 196 btstack_linked_list_iterator_init(&it, segments); 197 while (btstack_linked_list_iterator_has_next(&it)) { 198 mesh_network_pdu_t *segment = (mesh_network_pdu_t *) btstack_linked_list_iterator_next(&it); 199 btstack_assert(segment->pdu_header.pdu_type == MESH_PDU_TYPE_NETWORK); 200 // get segment n 201 uint8_t *lower_transport_pdu = mesh_network_pdu_data(segment); 202 uint8_t seg_o = (big_endian_read_16(lower_transport_pdu, 2) >> 5) & 0x001f; 203 uint8_t *segment_data = &lower_transport_pdu[4]; 204 (void) memcpy(&buffer[seg_o * segment_len], segment_data, segment_len); 205 } 206 } 207 208 static uint16_t mesh_upper_pdu_flatten(mesh_upper_transport_pdu_t * upper_pdu, uint8_t * buffer, uint16_t buffer_len) { 209 // assemble payload 210 btstack_linked_list_iterator_t it; 211 btstack_linked_list_iterator_init(&it, &upper_pdu->segments); 212 uint16_t offset = 0; 213 while (btstack_linked_list_iterator_has_next(&it)) { 214 mesh_network_pdu_t *segment = (mesh_network_pdu_t *) btstack_linked_list_iterator_next(&it); 215 btstack_assert(segment->pdu_header.pdu_type == MESH_PDU_TYPE_NETWORK); 216 btstack_assert((offset + segment->len) <= buffer_len); 217 (void) memcpy(&buffer[offset], segment->data, segment->len); 218 offset += segment->len; 219 } 220 return offset; 221 } 222 223 static void mesh_segmented_append_payload(const uint8_t * payload, uint16_t payload_len, btstack_linked_list_t * segments){ 224 uint16_t payload_offset = 0; 225 uint16_t bytes_current_segment = 0; 226 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_get_last_item(segments); 227 if (network_pdu){ 228 bytes_current_segment = MESH_NETWORK_PAYLOAD_MAX - network_pdu->len; 229 } 230 while (payload_offset < payload_len){ 231 if (bytes_current_segment == 0){ 232 network_pdu = mesh_network_pdu_get(); 233 btstack_assert(network_pdu != NULL); 234 btstack_linked_list_add_tail(segments, (btstack_linked_item_t *) network_pdu); 235 bytes_current_segment = MESH_NETWORK_PAYLOAD_MAX; 236 } 237 uint16_t bytes_to_copy = btstack_min(bytes_current_segment, payload_len - payload_offset); 238 (void) memcpy(&network_pdu->data[network_pdu->len], &payload[payload_offset], bytes_to_copy); 239 bytes_current_segment -= bytes_to_copy; 240 network_pdu->len += bytes_to_copy; 241 payload_offset += bytes_to_copy; 242 } 243 } 244 245 // stub lower transport 246 247 static void mesh_upper_transport_dump_pdus(const char *name, btstack_linked_list_t *list){ 248 printf("List: %s:\n", name); 249 btstack_linked_list_iterator_t it; 250 btstack_linked_list_iterator_init(&it, list); 251 while (btstack_linked_list_iterator_has_next(&it)){ 252 mesh_pdu_t * pdu = (mesh_pdu_t*) btstack_linked_list_iterator_next(&it); 253 printf("- %p\n", pdu); 254 // printf_hexdump( mesh_pdu_data(pdu), mesh_pdu_len(pdu)); 255 } 256 } 257 258 static void mesh_upper_transport_reset_pdus(btstack_linked_list_t *list){ 259 while (!btstack_linked_list_empty(list)){ 260 mesh_upper_transport_pdu_free((mesh_pdu_t *) btstack_linked_list_pop(list)); 261 } 262 } 263 264 void mesh_upper_transport_dump(void){ 265 mesh_upper_transport_dump_pdus("upper_transport_incoming", &upper_transport_incoming); 266 } 267 268 void mesh_upper_transport_reset(void){ 269 crypto_active = 0; 270 outgoing_upper_transport_pdu = NULL; 271 mesh_upper_transport_reset_pdus(&upper_transport_incoming); 272 } 273 274 static mesh_transport_key_t * mesh_upper_transport_get_outgoing_appkey(uint16_t netkey_index, uint16_t appkey_index){ 275 // Device Key is fixed 276 if (appkey_index == MESH_DEVICE_KEY_INDEX) { 277 return mesh_transport_key_get(appkey_index); 278 } 279 280 // Get key refresh state from subnet 281 mesh_subnet_t * subnet = mesh_subnet_get_by_netkey_index(netkey_index); 282 if (subnet == NULL) return NULL; 283 284 // identify old and new app keys for given appkey_index 285 mesh_transport_key_t * old_key = NULL; 286 mesh_transport_key_t * new_key = NULL; 287 mesh_transport_key_iterator_t it; 288 mesh_transport_key_iterator_init(&it, netkey_index); 289 while (mesh_transport_key_iterator_has_more(&it)){ 290 mesh_transport_key_t * transport_key = mesh_transport_key_iterator_get_next(&it); 291 if (transport_key->appkey_index != appkey_index) continue; 292 if (transport_key->old_key == 0) { 293 new_key = transport_key; 294 } else { 295 old_key = transport_key; 296 } 297 } 298 299 // if no key is marked as old, just use the current one 300 if (old_key == NULL) return new_key; 301 302 // use new key if it exists in phase two 303 if ((subnet->key_refresh == MESH_KEY_REFRESH_SECOND_PHASE) && (new_key != NULL)){ 304 return new_key; 305 } else { 306 return old_key; 307 } 308 } 309 310 static uint32_t iv_index_for_ivi_nid(uint8_t ivi_nid){ 311 // get IV Index and IVI 312 uint32_t iv_index = mesh_get_iv_index(); 313 int ivi = ivi_nid >> 7; 314 315 // if least significant bit differs, use previous IV Index 316 if ((iv_index & 1 ) ^ ivi){ 317 iv_index--; 318 } 319 return iv_index; 320 } 321 322 static void transport_segmented_setup_nonce(uint8_t * nonce, const mesh_pdu_t * pdu){ 323 mesh_access_pdu_t * access_pdu; 324 mesh_upper_transport_pdu_t * upper_pdu; 325 switch (pdu->pdu_type){ 326 case MESH_PDU_TYPE_ACCESS: 327 access_pdu = (mesh_access_pdu_t *) pdu; 328 nonce[1] = access_pdu->transmic_len == 8 ? 0x80 : 0x00; 329 (void)memcpy(&nonce[2], &access_pdu->network_header[2], 7); 330 big_endian_store_32(nonce, 9, iv_index_for_ivi_nid(access_pdu->network_header[0])); 331 break; 332 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 333 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 334 upper_pdu = (mesh_upper_transport_pdu_t *) pdu; 335 nonce[1] = upper_pdu->transmic_len == 8 ? 0x80 : 0x00; 336 // 'network header' 337 big_endian_store_24(nonce, 2, upper_pdu->seq); 338 big_endian_store_16(nonce, 5, upper_pdu->src); 339 big_endian_store_16(nonce, 7, upper_pdu->dst); 340 big_endian_store_32(nonce, 9, iv_index_for_ivi_nid(upper_pdu->ivi_nid)); 341 break; 342 default: 343 btstack_assert(0); 344 break; 345 } 346 } 347 348 static void transport_segmented_setup_application_nonce(uint8_t * nonce, const mesh_pdu_t * pdu){ 349 nonce[0] = 0x01; 350 transport_segmented_setup_nonce(nonce, pdu); 351 mesh_print_hex("AppNonce", nonce, 13); 352 } 353 354 static void transport_segmented_setup_device_nonce(uint8_t * nonce, const mesh_pdu_t * pdu){ 355 nonce[0] = 0x02; 356 transport_segmented_setup_nonce(nonce, pdu); 357 mesh_print_hex("DeviceNonce", nonce, 13); 358 } 359 360 static void mesh_upper_transport_process_access_message_done(mesh_access_pdu_t *access_pdu){ 361 crypto_active = 0; 362 btstack_assert(mesh_access_ctl(access_pdu) == 0); 363 incoming_access_pdu_encrypted = NULL; 364 mesh_upper_transport_run(); 365 } 366 367 static void mesh_upper_transport_process_control_message_done(mesh_control_pdu_t * control_pdu){ 368 crypto_active = 0; 369 incoming_control_pdu = NULL; 370 mesh_upper_transport_run(); 371 } 372 373 static void mesh_upper_transport_validate_segmented_message_ccm(void * arg){ 374 UNUSED(arg); 375 376 uint8_t * upper_transport_pdu = incoming_access_pdu_decrypted->data; 377 uint8_t upper_transport_pdu_len = incoming_access_pdu_decrypted->len - incoming_access_pdu_decrypted->transmic_len; 378 379 mesh_print_hex("Decrypted PDU", upper_transport_pdu, upper_transport_pdu_len); 380 381 // store TransMIC 382 uint8_t trans_mic[8]; 383 btstack_crypto_ccm_get_authentication_value(&ccm, trans_mic); 384 mesh_print_hex("TransMIC", trans_mic, incoming_access_pdu_decrypted->transmic_len); 385 386 if (memcmp(trans_mic, &upper_transport_pdu[upper_transport_pdu_len], incoming_access_pdu_decrypted->transmic_len) == 0){ 387 printf("TransMIC matches\n"); 388 389 // remove TransMIC from payload 390 incoming_access_pdu_decrypted->len -= incoming_access_pdu_decrypted->transmic_len; 391 392 // if virtual address, update dst to pseudo_dst 393 if (mesh_network_address_virtual(mesh_access_dst(incoming_access_pdu_decrypted))){ 394 big_endian_store_16(incoming_access_pdu_decrypted->network_header, 7, mesh_transport_key_it.address->pseudo_dst); 395 } 396 397 // pass to upper layer 398 btstack_assert(mesh_access_message_handler != NULL); 399 mesh_pdu_t * pdu = (mesh_pdu_t*) incoming_access_pdu_decrypted; 400 mesh_access_message_handler(MESH_TRANSPORT_PDU_RECEIVED, MESH_TRANSPORT_STATUS_SUCCESS, pdu); 401 402 printf("\n"); 403 404 } else { 405 uint8_t akf = incoming_access_pdu_decrypted->akf_aid_control & 0x40; 406 if (akf){ 407 printf("TransMIC does not match, try next key\n"); 408 mesh_upper_transport_validate_segmented_message(); 409 } else { 410 printf("TransMIC does not match device key, done\n"); 411 // done 412 mesh_upper_transport_process_access_message_done(incoming_access_pdu_decrypted); 413 } 414 } 415 } 416 417 static void mesh_upper_transport_validate_segmented_message_digest(void * arg){ 418 UNUSED(arg); 419 uint8_t upper_transport_pdu_len = incoming_access_pdu_encrypted->len - incoming_access_pdu_encrypted->transmic_len; 420 uint8_t * upper_transport_pdu_data_in = incoming_access_pdu_encrypted->data; 421 uint8_t * upper_transport_pdu_data_out = incoming_access_pdu_decrypted->data; 422 btstack_crypto_ccm_decrypt_block(&ccm, upper_transport_pdu_len, upper_transport_pdu_data_in, upper_transport_pdu_data_out, &mesh_upper_transport_validate_segmented_message_ccm, NULL); 423 } 424 425 static void mesh_upper_transport_validate_segmented_message(void){ 426 uint8_t * upper_transport_pdu_data = incoming_access_pdu_decrypted->data; 427 uint8_t upper_transport_pdu_len = incoming_access_pdu_decrypted->len - incoming_access_pdu_decrypted->transmic_len; 428 429 if (!mesh_transport_key_and_virtual_address_iterator_has_more(&mesh_transport_key_it)){ 430 printf("No valid transport key found\n"); 431 mesh_upper_transport_process_access_message_done(incoming_access_pdu_decrypted); 432 return; 433 } 434 mesh_transport_key_and_virtual_address_iterator_next(&mesh_transport_key_it); 435 const mesh_transport_key_t * message_key = mesh_transport_key_it.key; 436 437 if (message_key->akf){ 438 transport_segmented_setup_application_nonce(application_nonce, (mesh_pdu_t *) incoming_access_pdu_encrypted); 439 } else { 440 transport_segmented_setup_device_nonce(application_nonce, (mesh_pdu_t *) incoming_access_pdu_encrypted); 441 } 442 443 // store application / device key index 444 mesh_print_hex("AppOrDevKey", message_key->key, 16); 445 incoming_access_pdu_decrypted->appkey_index = message_key->appkey_index; 446 447 mesh_print_hex("EncAccessPayload", upper_transport_pdu_data, upper_transport_pdu_len); 448 449 // decrypt ccm 450 crypto_active = 1; 451 uint16_t aad_len = 0; 452 if (mesh_network_address_virtual(mesh_access_dst(incoming_access_pdu_decrypted))){ 453 aad_len = 16; 454 } 455 btstack_crypto_ccm_init(&ccm, message_key->key, application_nonce, upper_transport_pdu_len, aad_len, incoming_access_pdu_decrypted->transmic_len); 456 457 if (aad_len){ 458 btstack_crypto_ccm_digest(&ccm, (uint8_t *) mesh_transport_key_it.address->label_uuid, aad_len, &mesh_upper_transport_validate_segmented_message_digest, NULL); 459 } else { 460 mesh_upper_transport_validate_segmented_message_digest(NULL); 461 } 462 } 463 464 static void mesh_upper_transport_process_segmented_message(void){ 465 // copy original pdu 466 (void)memcpy(incoming_access_pdu_decrypted, incoming_access_pdu_encrypted, 467 sizeof(mesh_access_pdu_t)); 468 469 // 470 uint8_t * upper_transport_pdu = incoming_access_pdu_decrypted->data; 471 uint8_t upper_transport_pdu_len = incoming_access_pdu_decrypted->len - incoming_access_pdu_decrypted->transmic_len; 472 mesh_print_hex("Upper Transport pdu", upper_transport_pdu, upper_transport_pdu_len); 473 474 uint8_t aid = incoming_access_pdu_decrypted->akf_aid_control & 0x3f; 475 uint8_t akf = (incoming_access_pdu_decrypted->akf_aid_control & 0x40) >> 6; 476 477 printf("AKF: %u\n", akf); 478 printf("AID: %02x\n", aid); 479 480 mesh_transport_key_and_virtual_address_iterator_init(&mesh_transport_key_it, mesh_access_dst(incoming_access_pdu_decrypted), 481 incoming_access_pdu_decrypted->netkey_index, akf, aid); 482 mesh_upper_transport_validate_segmented_message(); 483 } 484 485 static void mesh_upper_transport_message_received(mesh_pdu_t * pdu){ 486 btstack_linked_list_add_tail(&upper_transport_incoming, (btstack_linked_item_t*) pdu); 487 mesh_upper_transport_run(); 488 } 489 490 static void mesh_upper_transport_send_access_segmented(mesh_upper_transport_pdu_t * upper_pdu){ 491 492 // TODO: store upper pdu in outgoing pdus active or similar 493 outgoing_upper_transport_pdu = upper_pdu; 494 495 mesh_segmented_pdu_t * message_pdu = &outgoing_segmented_pdu_singleton; 496 message_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_SEGMENTED; 497 498 // convert mesh_access_pdu_t into mesh_segmented_pdu_t 499 mesh_segmented_append_payload(crypto_buffer, upper_pdu->len, &message_pdu->segments); 500 501 // copy meta 502 message_pdu->len = upper_pdu->len; 503 message_pdu->netkey_index = upper_pdu->netkey_index; 504 message_pdu->transmic_len = upper_pdu->transmic_len; 505 message_pdu->akf_aid_control = upper_pdu->akf_aid_control; 506 message_pdu->flags = upper_pdu->flags; 507 508 // setup message_pdu header 509 // (void)memcpy(message_pdu->network_header, upper_pdu->network_header, 9); 510 // TODO: use fields in mesh_segmented_pdu_t and setup network header in lower transport 511 message_pdu->network_header[0] = upper_pdu->ivi_nid; 512 message_pdu->network_header[1] = upper_pdu->ctl_ttl; 513 big_endian_store_24(message_pdu->network_header, 2, upper_pdu->seq); 514 big_endian_store_16(message_pdu->network_header, 5, upper_pdu->src); 515 big_endian_store_16(message_pdu->network_header, 7, upper_pdu->dst); 516 517 mesh_lower_transport_send_pdu((mesh_pdu_t*) message_pdu); 518 } 519 520 static void mesh_upper_transport_send_access_unsegmented(mesh_upper_transport_pdu_t * upper_pdu){ 521 522 // TODO: store upper pdu in outgoing pdus active or similar 523 outgoing_upper_transport_pdu = upper_pdu; 524 525 // provide segment 526 mesh_network_pdu_t * network_pdu = mesh_network_pdu_get(); 527 btstack_assert(network_pdu); 528 529 // setup network pdu 530 network_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS; 531 network_pdu->data[0] = upper_pdu->ivi_nid; 532 network_pdu->data[1] = upper_pdu->ctl_ttl; 533 big_endian_store_24(network_pdu->data, 2, upper_pdu->seq); 534 big_endian_store_16(network_pdu->data, 5, upper_pdu->src); 535 big_endian_store_16(network_pdu->data, 7, upper_pdu->dst); 536 network_pdu->netkey_index = upper_pdu->netkey_index; 537 538 // setup access message 539 network_pdu->data[9] = upper_pdu->akf_aid_control; 540 btstack_assert(upper_pdu->len < 15); 541 (void)memcpy(&network_pdu->data[10], crypto_buffer, upper_pdu->len); 542 network_pdu->len = 10 + upper_pdu->len; 543 network_pdu->flags = 0; 544 545 mesh_lower_transport_send_pdu((mesh_pdu_t*) network_pdu); 546 } 547 548 static void mesh_upper_transport_send_access_ccm(void * arg){ 549 crypto_active = 0; 550 551 mesh_upper_transport_pdu_t * upper_pdu = (mesh_upper_transport_pdu_t *) arg; 552 mesh_print_hex("EncAccessPayload", crypto_buffer, upper_pdu->len); 553 // store TransMIC 554 btstack_crypto_ccm_get_authentication_value(&ccm, &crypto_buffer[upper_pdu->len]); 555 mesh_print_hex("TransMIC", &crypto_buffer[upper_pdu->len], upper_pdu->transmic_len); 556 upper_pdu->len += upper_pdu->transmic_len; 557 mesh_print_hex("UpperTransportPDU", crypto_buffer, upper_pdu->len); 558 switch (upper_pdu->pdu_header.pdu_type){ 559 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 560 mesh_upper_transport_send_access_unsegmented(upper_pdu); 561 break; 562 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 563 mesh_upper_transport_send_access_segmented(upper_pdu); 564 break; 565 default: 566 btstack_assert(false); 567 } 568 } 569 570 static void mesh_upper_transport_send_access_digest(void *arg){ 571 mesh_upper_transport_pdu_t * upper_pdu = (mesh_upper_transport_pdu_t *) arg; 572 uint16_t access_pdu_len = upper_pdu->len; 573 btstack_crypto_ccm_encrypt_block(&ccm, access_pdu_len, crypto_buffer, crypto_buffer, 574 &mesh_upper_transport_send_access_ccm, upper_pdu); 575 } 576 577 static void mesh_upper_transport_send_access(mesh_upper_transport_pdu_t * upper_pdu){ 578 579 // if dst is virtual address, lookup label uuid and hash 580 uint16_t aad_len = 0; 581 mesh_virtual_address_t * virtual_address = NULL; 582 if (mesh_network_address_virtual(upper_pdu->dst)){ 583 virtual_address = mesh_virtual_address_for_pseudo_dst(upper_pdu->dst); 584 if (!virtual_address){ 585 printf("No virtual address register for pseudo dst %4x\n", upper_pdu->dst); 586 mesh_access_message_handler(MESH_TRANSPORT_PDU_SENT, MESH_TRANSPORT_STATUS_SEND_FAILED, (mesh_pdu_t *) upper_pdu); 587 return; 588 } 589 // printf("Using hash %4x with LabelUUID: ", virtual_address->hash); 590 // printf_hexdump(virtual_address->label_uuid, 16); 591 aad_len = 16; 592 upper_pdu->dst = virtual_address->hash; 593 } 594 595 // get app or device key 596 uint16_t appkey_index = upper_pdu->appkey_index; 597 const mesh_transport_key_t * appkey = mesh_upper_transport_get_outgoing_appkey(upper_pdu->netkey_index, appkey_index); 598 if (appkey == NULL){ 599 printf("AppKey %04x not found, drop message\n", appkey_index); 600 mesh_access_message_handler(MESH_TRANSPORT_PDU_SENT, MESH_TRANSPORT_STATUS_SEND_FAILED, (mesh_pdu_t *) upper_pdu); 601 return; 602 } 603 604 // reserve slot 605 mesh_lower_transport_reserve_slot(); 606 607 // reserve one sequence number, which is also used to encrypt access payload 608 uint32_t seq = mesh_sequence_number_next(); 609 upper_pdu->flags |= MESH_TRANSPORT_FLAG_SEQ_RESERVED; 610 upper_pdu->seq = seq; 611 612 // also reserves crypto_buffer 613 crypto_active = 1; 614 615 // flatten segmented pdu into crypto buffer 616 uint16_t payload_len = mesh_upper_pdu_flatten(upper_pdu, crypto_buffer, sizeof(crypto_buffer)); 617 btstack_assert(payload_len == upper_pdu->len); 618 619 // Dump PDU 620 printf("[+] Upper transport, send upper (un)segmented Access PDU - dest %04x, seq %06x\n", upper_pdu->dst, upper_pdu->seq); 621 mesh_print_hex("Access Payload", crypto_buffer, upper_pdu->len); 622 623 // setup nonce - uses dst, so after pseudo address translation 624 if (appkey_index == MESH_DEVICE_KEY_INDEX){ 625 transport_segmented_setup_device_nonce(application_nonce, (mesh_pdu_t *) upper_pdu); 626 } else { 627 transport_segmented_setup_application_nonce(application_nonce, (mesh_pdu_t *) upper_pdu); 628 } 629 630 // Dump key 631 mesh_print_hex("AppOrDevKey", appkey->key, 16); 632 633 // encrypt ccm 634 uint8_t transmic_len = upper_pdu->transmic_len; 635 uint16_t access_pdu_len = upper_pdu->len; 636 btstack_crypto_ccm_init(&ccm, appkey->key, application_nonce, access_pdu_len, aad_len, transmic_len); 637 if (virtual_address){ 638 mesh_print_hex("LabelUUID", virtual_address->label_uuid, 16); 639 btstack_crypto_ccm_digest(&ccm, virtual_address->label_uuid, 16, 640 &mesh_upper_transport_send_access_digest, upper_pdu); 641 } else { 642 mesh_upper_transport_send_access_digest(upper_pdu); 643 } 644 } 645 646 static void mesh_upper_transport_send_unsegmented_control_pdu(mesh_network_pdu_t * network_pdu){ 647 // reserve slot 648 mesh_lower_transport_reserve_slot(); 649 // reserve sequence number 650 uint32_t seq = mesh_sequence_number_next(); 651 mesh_network_pdu_set_seq(network_pdu, seq); 652 // Dump PDU 653 uint8_t opcode = network_pdu->data[9]; 654 printf("[+] Upper transport, send unsegmented Control PDU %p - seq %06x opcode %02x\n", network_pdu, seq, opcode); 655 mesh_print_hex("Access Payload", &network_pdu->data[10], network_pdu->len - 10); 656 657 // send 658 mesh_lower_transport_send_pdu((mesh_pdu_t *) network_pdu); 659 } 660 661 static void mesh_upper_transport_send_segmented_control_pdu(mesh_upper_transport_pdu_t * upper_pdu){ 662 // reserve slot 663 mesh_lower_transport_reserve_slot(); 664 // reserve sequence number 665 uint32_t seq = mesh_sequence_number_next(); 666 upper_pdu->flags |= MESH_TRANSPORT_FLAG_SEQ_RESERVED; 667 upper_pdu->seq = seq; 668 // Dump PDU 669 // uint8_t opcode = upper_pdu->data[0]; 670 // printf("[+] Upper transport, send segmented Control PDU %p - seq %06x opcode %02x\n", upper_pdu, seq, opcode); 671 // mesh_print_hex("Access Payload", &upper_pdu->data[1], upper_pdu->len - 1); 672 // send 673 outgoing_upper_transport_pdu = upper_pdu; 674 mesh_segmented_pdu_t *messagePdu = &outgoing_segmented_pdu_singleton; 675 messagePdu->pdu_header.pdu_type = MESH_PDU_TYPE_SEGMENTED; 676 677 // lend segments to lower transport pdu 678 messagePdu->segments = upper_pdu->segments; 679 upper_pdu->segments = NULL; 680 681 // copy meta 682 messagePdu->len = upper_pdu->len; 683 messagePdu->netkey_index = upper_pdu->netkey_index; 684 messagePdu->transmic_len = 0; // no TransMIC for control 685 messagePdu->akf_aid_control = upper_pdu->akf_aid_control; 686 messagePdu->flags = upper_pdu->flags; 687 688 // setup message_pdu header 689 // TODO: use fields in mesh_segmented_pdu_t and setup network header in lower transport 690 messagePdu->network_header[0] = upper_pdu->ivi_nid; 691 messagePdu->network_header[1] = upper_pdu->ctl_ttl; 692 big_endian_store_24(messagePdu->network_header, 2, upper_pdu->seq); 693 big_endian_store_16(messagePdu->network_header, 5, upper_pdu->src); 694 big_endian_store_16(messagePdu->network_header, 7, upper_pdu->dst); 695 696 mesh_lower_transport_send_pdu((mesh_pdu_t *) messagePdu); 697 } 698 699 static void mesh_upper_transport_run(void){ 700 701 while(!btstack_linked_list_empty(&upper_transport_incoming)){ 702 703 if (crypto_active) return; 704 705 // get next message 706 mesh_pdu_t * pdu = (mesh_pdu_t *) btstack_linked_list_pop(&upper_transport_incoming); 707 mesh_network_pdu_t * network_pdu; 708 mesh_segmented_pdu_t * message_pdu; 709 switch (pdu->pdu_type){ 710 case MESH_PDU_TYPE_UNSEGMENTED: 711 network_pdu = (mesh_network_pdu_t *) pdu; 712 // control? 713 if (mesh_network_control(network_pdu)) { 714 715 incoming_control_pdu = &incoming_control_pdu_singleton; 716 incoming_control_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_CONTROL; 717 incoming_control_pdu->len = network_pdu->len; 718 incoming_control_pdu->netkey_index = network_pdu->netkey_index; 719 720 uint8_t * lower_transport_pdu = mesh_network_pdu_data(network_pdu); 721 722 incoming_control_pdu->akf_aid_control = lower_transport_pdu[0]; 723 incoming_control_pdu->len = network_pdu->len - 10; // 9 header + 1 opcode 724 (void)memcpy(incoming_control_pdu->data, &lower_transport_pdu[1], incoming_control_pdu->len); 725 726 // copy meta data into encrypted pdu buffer 727 (void)memcpy(incoming_control_pdu->network_header, network_pdu->data, 9); 728 729 mesh_print_hex("Assembled payload", incoming_control_pdu->data, incoming_control_pdu->len); 730 731 // free mesh message 732 mesh_lower_transport_message_processed_by_higher_layer(pdu); 733 734 btstack_assert(mesh_control_message_handler != NULL); 735 mesh_pdu_t * pdu = (mesh_pdu_t*) incoming_control_pdu; 736 mesh_control_message_handler(MESH_TRANSPORT_PDU_RECEIVED, MESH_TRANSPORT_STATUS_SUCCESS, pdu); 737 738 } else { 739 740 incoming_access_pdu_encrypted = &incoming_access_pdu_encrypted_singleton; 741 incoming_access_pdu_encrypted->pdu_header.pdu_type = MESH_PDU_TYPE_ACCESS; 742 incoming_access_pdu_decrypted = &incoming_access_pdu_decrypted_singleton; 743 744 incoming_access_pdu_encrypted->netkey_index = network_pdu->netkey_index; 745 incoming_access_pdu_encrypted->transmic_len = 4; 746 747 uint8_t * lower_transport_pdu = mesh_network_pdu_data(network_pdu); 748 749 incoming_access_pdu_encrypted->akf_aid_control = lower_transport_pdu[0]; 750 incoming_access_pdu_encrypted->len = network_pdu->len - 10; // 9 header + 1 AID 751 (void)memcpy(incoming_access_pdu_encrypted->data, &lower_transport_pdu[1], incoming_access_pdu_encrypted->len); 752 753 // copy meta data into encrypted pdu buffer 754 (void)memcpy(incoming_access_pdu_encrypted->network_header, network_pdu->data, 9); 755 756 mesh_print_hex("Assembled payload", incoming_access_pdu_encrypted->data, incoming_access_pdu_encrypted->len); 757 758 // free mesh message 759 mesh_lower_transport_message_processed_by_higher_layer(pdu); 760 761 // get encoded transport pdu and start processing 762 mesh_upper_transport_process_segmented_message(); 763 } 764 break; 765 case MESH_PDU_TYPE_SEGMENTED: 766 message_pdu = (mesh_segmented_pdu_t *) pdu; 767 uint8_t ctl = mesh_message_ctl(message_pdu); 768 if (ctl){ 769 incoming_control_pdu= &incoming_control_pdu_singleton; 770 incoming_control_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_CONTROL; 771 772 // flatten 773 mesh_segmented_pdu_flatten(&message_pdu->segments, 8, incoming_control_pdu->data); 774 775 // copy meta data into encrypted pdu buffer 776 incoming_control_pdu->len = message_pdu->len; 777 incoming_control_pdu->netkey_index = message_pdu->netkey_index; 778 incoming_control_pdu->akf_aid_control = message_pdu->akf_aid_control; 779 incoming_control_pdu->flags = 0; 780 (void)memcpy(incoming_control_pdu->network_header, message_pdu->network_header, 9); 781 782 mesh_print_hex("Assembled payload", incoming_control_pdu->data, incoming_control_pdu->len); 783 784 // free mesh message 785 mesh_lower_transport_message_processed_by_higher_layer((mesh_pdu_t *)message_pdu); 786 787 btstack_assert(mesh_control_message_handler != NULL); 788 mesh_pdu_t * pdu = (mesh_pdu_t*) incoming_control_pdu; 789 mesh_access_message_handler(MESH_TRANSPORT_PDU_RECEIVED, MESH_TRANSPORT_STATUS_SUCCESS, pdu); 790 791 } else { 792 793 incoming_access_pdu_encrypted = &incoming_access_pdu_encrypted_singleton; 794 incoming_access_pdu_encrypted->pdu_header.pdu_type = MESH_PDU_TYPE_ACCESS; 795 incoming_access_pdu_decrypted = &incoming_access_pdu_decrypted_singleton; 796 797 // flatten 798 mesh_segmented_pdu_flatten(&message_pdu->segments, 12, incoming_access_pdu_encrypted->data); 799 800 // copy meta data into encrypted pdu buffer 801 incoming_access_pdu_encrypted->len = message_pdu->len; 802 incoming_access_pdu_encrypted->netkey_index = message_pdu->netkey_index; 803 incoming_access_pdu_encrypted->transmic_len = message_pdu->transmic_len; 804 incoming_access_pdu_encrypted->akf_aid_control = message_pdu->akf_aid_control; 805 (void)memcpy(incoming_access_pdu_encrypted->network_header, message_pdu->network_header, 9); 806 807 mesh_print_hex("Assembled payload", incoming_access_pdu_encrypted->data, incoming_access_pdu_encrypted->len); 808 809 // free mesh message 810 mesh_lower_transport_message_processed_by_higher_layer((mesh_pdu_t *)message_pdu); 811 812 // get encoded transport pdu and start processing 813 mesh_upper_transport_process_segmented_message(); 814 } 815 break; 816 default: 817 btstack_assert(0); 818 break; 819 } 820 } 821 822 while (!btstack_linked_list_empty(&upper_transport_outgoing)){ 823 824 if (crypto_active) break; 825 826 if (outgoing_upper_transport_pdu != NULL) break; 827 828 mesh_pdu_t * pdu = (mesh_pdu_t *) btstack_linked_list_get_first_item(&upper_transport_outgoing); 829 if (mesh_lower_transport_can_send_to_dest(mesh_pdu_dst(pdu)) == 0) break; 830 831 (void) btstack_linked_list_pop(&upper_transport_outgoing); 832 833 834 switch (pdu->pdu_type){ 835 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_CONTROL: 836 btstack_assert(mesh_pdu_ctl(pdu) != 0); 837 mesh_upper_transport_send_unsegmented_control_pdu((mesh_network_pdu_t *) pdu); 838 break; 839 case MESH_PDU_TYPE_UPPER_SEGMENTED_CONTROL: 840 mesh_upper_transport_send_segmented_control_pdu((mesh_upper_transport_pdu_t *) pdu); 841 break; 842 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 843 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 844 mesh_upper_transport_send_access((mesh_upper_transport_pdu_t *) pdu); 845 break; 846 default: 847 btstack_assert(false); 848 break; 849 } 850 } 851 } 852 853 static void mesh_upper_transport_pdu_handler(mesh_transport_callback_type_t callback_type, mesh_transport_status_t status, mesh_pdu_t * pdu){ 854 mesh_pdu_t * pdu_to_report; 855 mesh_upper_transport_pdu_t * upper_pdu; 856 switch (callback_type){ 857 case MESH_TRANSPORT_PDU_RECEIVED: 858 mesh_upper_transport_message_received(pdu); 859 break; 860 case MESH_TRANSPORT_PDU_SENT: 861 switch (pdu->pdu_type){ 862 case MESH_PDU_TYPE_SEGMENTED: 863 // free chunks 864 while (!btstack_linked_list_empty(&outgoing_segmented_pdu_singleton.segments)){ 865 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&outgoing_segmented_pdu_singleton.segments); 866 mesh_network_pdu_free(network_pdu); 867 } 868 // notify upper layer but use transport pdu 869 pdu_to_report = (mesh_pdu_t *) outgoing_upper_transport_pdu; 870 outgoing_upper_transport_pdu = NULL; 871 if (mesh_pdu_ctl(pdu_to_report)){ 872 mesh_control_message_handler(callback_type, status, pdu_to_report); 873 } else { 874 mesh_access_message_handler(callback_type, status, pdu_to_report); 875 } 876 break; 877 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 878 upper_pdu = outgoing_upper_transport_pdu; 879 outgoing_upper_transport_pdu = NULL; 880 mesh_access_message_handler(callback_type, status, (mesh_pdu_t*) upper_pdu); 881 break; 882 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_CONTROL: 883 mesh_access_message_handler(callback_type, status, pdu); 884 break; 885 default: 886 btstack_assert(false); 887 break; 888 } 889 mesh_upper_transport_run(); 890 break; 891 default: 892 break; 893 } 894 } 895 896 void mesh_upper_transport_pdu_free(mesh_pdu_t * pdu){ 897 mesh_network_pdu_t * network_pdu; 898 mesh_segmented_pdu_t * message_pdu; 899 switch (pdu->pdu_type) { 900 case MESH_PDU_TYPE_NETWORK: 901 network_pdu = (mesh_network_pdu_t *) pdu; 902 mesh_network_pdu_free(network_pdu); 903 break; 904 case MESH_PDU_TYPE_SEGMENTED: 905 message_pdu = (mesh_segmented_pdu_t *) pdu; 906 mesh_message_pdu_free(message_pdu); 907 default: 908 btstack_assert(false); 909 break; 910 } 911 } 912 913 void mesh_upper_transport_message_processed_by_higher_layer(mesh_pdu_t * pdu){ 914 crypto_active = 0; 915 switch (pdu->pdu_type){ 916 case MESH_PDU_TYPE_ACCESS: 917 mesh_upper_transport_process_access_message_done((mesh_access_pdu_t *) pdu); 918 case MESH_PDU_TYPE_CONTROL: 919 mesh_upper_transport_process_control_message_done((mesh_control_pdu_t *) pdu); 920 break; 921 default: 922 btstack_assert(0); 923 break; 924 } 925 } 926 927 void mesh_upper_transport_send_access_pdu(mesh_pdu_t *pdu){ 928 switch (pdu->pdu_type){ 929 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 930 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 931 break; 932 default: 933 btstack_assert(false); 934 break; 935 } 936 937 btstack_linked_list_add_tail(&upper_transport_outgoing, (btstack_linked_item_t*) pdu); 938 mesh_upper_transport_run(); 939 } 940 941 void mesh_upper_transport_send_control_pdu(mesh_pdu_t * pdu){ 942 switch (pdu->pdu_type){ 943 case MESH_PDU_TYPE_UPPER_SEGMENTED_CONTROL: 944 break; 945 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_CONTROL: 946 btstack_assert( ((mesh_network_pdu_t *) pdu)->len >= 9); 947 break; 948 default: 949 btstack_assert(false); 950 break; 951 } 952 953 btstack_linked_list_add_tail(&upper_transport_outgoing, (btstack_linked_item_t*) pdu); 954 mesh_upper_transport_run(); 955 } 956 957 static uint8_t mesh_upper_transport_setup_unsegmented_control_pdu(mesh_network_pdu_t * network_pdu, uint16_t netkey_index, uint8_t ttl, uint16_t src, uint16_t dest, uint8_t opcode, 958 const uint8_t * control_pdu_data, uint16_t control_pdu_len){ 959 960 if (control_pdu_len > 11) return 1; 961 962 const mesh_network_key_t * network_key = mesh_network_key_list_get(netkey_index); 963 if (!network_key) return 1; 964 965 uint8_t transport_pdu_data[12]; 966 transport_pdu_data[0] = opcode; 967 (void)memcpy(&transport_pdu_data[1], control_pdu_data, control_pdu_len); 968 uint16_t transport_pdu_len = control_pdu_len + 1; 969 970 // setup network_pdu 971 mesh_network_setup_pdu(network_pdu, netkey_index, network_key->nid, 1, ttl, 0, src, dest, transport_pdu_data, transport_pdu_len); 972 973 return 0; 974 } 975 976 static uint8_t mesh_upper_transport_setup_segmented_control_pdu(mesh_upper_transport_pdu_t * upper_pdu, uint16_t netkey_index, uint8_t ttl, uint16_t src, uint16_t dest, uint8_t opcode, 977 const uint8_t * control_pdu_data, uint16_t control_pdu_len){ 978 979 if (control_pdu_len > 256) return 1; 980 981 const mesh_network_key_t * network_key = mesh_network_key_list_get(netkey_index); 982 if (!network_key) return 1; 983 984 upper_pdu->ivi_nid = network_key->nid | ((mesh_get_iv_index_for_tx() & 1) << 7); 985 upper_pdu->ctl_ttl = ttl; 986 upper_pdu->src = src; 987 upper_pdu->dst = dest; 988 upper_pdu->transmic_len = 0; // no TransMIC for control 989 upper_pdu->netkey_index = netkey_index; 990 upper_pdu->akf_aid_control = opcode; 991 992 mesh_segmented_append_payload(control_pdu_data, control_pdu_len, &upper_pdu->segments); 993 upper_pdu->len = control_pdu_len; 994 return 0; 995 } 996 997 uint8_t mesh_upper_transport_setup_control_pdu(mesh_pdu_t * pdu, uint16_t netkey_index, 998 uint8_t ttl, uint16_t src, uint16_t dest, uint8_t opcode, const uint8_t * control_pdu_data, uint16_t control_pdu_len){ 999 switch (pdu->pdu_type){ 1000 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_CONTROL: 1001 return mesh_upper_transport_setup_unsegmented_control_pdu((mesh_network_pdu_t *) pdu, netkey_index, ttl, src, dest, opcode, control_pdu_data, control_pdu_len); 1002 case MESH_PDU_TYPE_UPPER_SEGMENTED_CONTROL: 1003 return mesh_upper_transport_setup_segmented_control_pdu((mesh_upper_transport_pdu_t *) pdu, netkey_index, ttl, src, dest, opcode, control_pdu_data, control_pdu_len); 1004 default: 1005 btstack_assert(0); 1006 return 1; 1007 } 1008 } 1009 1010 static uint8_t mesh_upper_transport_setup_segmented_access_pdu_header(mesh_access_pdu_t * access_pdu, uint16_t netkey_index, 1011 uint16_t appkey_index, uint8_t ttl, uint16_t src, uint16_t dest, uint8_t szmic){ 1012 1013 // get app or device key 1014 const mesh_transport_key_t *appkey; 1015 appkey = mesh_transport_key_get(appkey_index); 1016 if (appkey == NULL) { 1017 printf("[!] Upper transport, setup segmented Access PDU - appkey_index %x unknown\n", appkey_index); 1018 return 1; 1019 } 1020 uint8_t akf_aid = (appkey->akf << 6) | appkey->aid; 1021 1022 // lookup network by netkey_index 1023 const mesh_network_key_t *network_key = mesh_network_key_list_get(netkey_index); 1024 if (!network_key) return 1; 1025 if (network_key == NULL) { 1026 printf("[!] Upper transport, setup segmented Access PDU - netkey_index %x unknown\n", appkey_index); 1027 return 1; 1028 } 1029 1030 const uint8_t trans_mic_len = szmic ? 8 : 4; 1031 1032 // store in transport pdu 1033 access_pdu->transmic_len = trans_mic_len; 1034 access_pdu->netkey_index = netkey_index; 1035 access_pdu->appkey_index = appkey_index; 1036 access_pdu->akf_aid_control = akf_aid; 1037 mesh_access_set_nid_ivi(access_pdu, network_key->nid | ((mesh_get_iv_index_for_tx() & 1) << 7)); 1038 mesh_access_set_src(access_pdu, src); 1039 mesh_access_set_dest(access_pdu, dest); 1040 mesh_access_set_ctl_ttl(access_pdu, ttl); 1041 return 0; 1042 } 1043 1044 static uint8_t mesh_upper_transport_setup_upper_access_pdu_header(mesh_upper_transport_pdu_t * upper_pdu, uint16_t netkey_index, 1045 uint16_t appkey_index, uint8_t ttl, uint16_t src, uint16_t dest, uint8_t szmic){ 1046 1047 // get app or device key 1048 const mesh_transport_key_t *appkey; 1049 appkey = mesh_transport_key_get(appkey_index); 1050 if (appkey == NULL) { 1051 printf("[!] Upper transport, setup segmented Access PDU - appkey_index %x unknown\n", appkey_index); 1052 return 1; 1053 } 1054 uint8_t akf_aid = (appkey->akf << 6) | appkey->aid; 1055 1056 // lookup network by netkey_index 1057 const mesh_network_key_t *network_key = mesh_network_key_list_get(netkey_index); 1058 if (!network_key) return 1; 1059 if (network_key == NULL) { 1060 printf("[!] Upper transport, setup segmented Access PDU - netkey_index %x unknown\n", appkey_index); 1061 return 1; 1062 } 1063 1064 const uint8_t trans_mic_len = szmic ? 8 : 4; 1065 1066 // store in transport pdu 1067 upper_pdu->ivi_nid = network_key->nid | ((mesh_get_iv_index_for_tx() & 1) << 7); 1068 upper_pdu->ctl_ttl = ttl; 1069 upper_pdu->src = src; 1070 upper_pdu->dst = dest; 1071 upper_pdu->transmic_len = trans_mic_len; 1072 upper_pdu->netkey_index = netkey_index; 1073 upper_pdu->appkey_index = appkey_index; 1074 upper_pdu->akf_aid_control = akf_aid; 1075 return 0; 1076 } 1077 1078 static uint8_t mesh_upper_transport_setup_upper_access_pdu(mesh_upper_transport_pdu_t * upper_pdu, uint16_t netkey_index, uint16_t appkey_index, uint8_t ttl, uint16_t src, uint16_t dest, 1079 uint8_t szmic, const uint8_t * access_pdu_data, uint8_t access_pdu_len){ 1080 int status = mesh_upper_transport_setup_upper_access_pdu_header(upper_pdu, netkey_index, appkey_index, ttl, src, 1081 dest, szmic); 1082 if (status) return status; 1083 1084 // store in transport pdu 1085 mesh_segmented_append_payload(access_pdu_data, access_pdu_len, &upper_pdu->segments); 1086 upper_pdu->len = access_pdu_len; 1087 return 0; 1088 } 1089 1090 1091 uint8_t mesh_upper_transport_setup_access_pdu_header(mesh_pdu_t * pdu, uint16_t netkey_index, uint16_t appkey_index, 1092 uint8_t ttl, uint16_t src, uint16_t dest, uint8_t szmic){ 1093 switch (pdu->pdu_type){ 1094 case MESH_PDU_TYPE_ACCESS: 1095 return mesh_upper_transport_setup_segmented_access_pdu_header((mesh_access_pdu_t *) pdu, netkey_index, appkey_index, ttl, src, dest, szmic); 1096 default: 1097 btstack_assert(false); 1098 return 1; 1099 } 1100 } 1101 1102 uint8_t mesh_upper_transport_setup_access_pdu(mesh_pdu_t * pdu, uint16_t netkey_index, uint16_t appkey_index, 1103 uint8_t ttl, uint16_t src, uint16_t dest, uint8_t szmic, 1104 const uint8_t * access_pdu_data, uint8_t access_pdu_len){ 1105 switch (pdu->pdu_type){ 1106 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 1107 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 1108 return mesh_upper_transport_setup_upper_access_pdu((mesh_upper_transport_pdu_t *) pdu, netkey_index, 1109 appkey_index, ttl, src, dest, szmic, access_pdu_data, 1110 access_pdu_len); 1111 default: 1112 btstack_assert(false); 1113 return 1; 1114 } 1115 } 1116 1117 void mesh_upper_transport_register_access_message_handler(void (*callback)(mesh_transport_callback_type_t callback_type, mesh_transport_status_t status, mesh_pdu_t * pdu)) { 1118 mesh_access_message_handler = callback; 1119 } 1120 1121 void mesh_upper_transport_register_control_message_handler(void (*callback)(mesh_transport_callback_type_t callback_type, mesh_transport_status_t status, mesh_pdu_t * pdu)){ 1122 mesh_control_message_handler = callback; 1123 } 1124 1125 void mesh_upper_transport_init(){ 1126 mesh_lower_transport_set_higher_layer_handler(&mesh_upper_transport_pdu_handler); 1127 } 1128