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 // upper transport callbacks - in access layer 78 static void (*mesh_access_message_handler)( mesh_transport_callback_type_t callback_type, mesh_transport_status_t status, mesh_pdu_t * pdu); 79 static void (*mesh_control_message_handler)( mesh_transport_callback_type_t callback_type, mesh_transport_status_t status, mesh_pdu_t * pdu); 80 81 // 82 static int crypto_active; 83 static uint8_t application_nonce[13]; 84 static btstack_crypto_ccm_t ccm; 85 static uint8_t crypto_buffer[MESH_ACCESS_PAYLOAD_MAX]; 86 87 static mesh_transport_key_and_virtual_address_iterator_t mesh_transport_key_it; 88 89 static mesh_access_pdu_t * incoming_access_pdu_encrypted; 90 static mesh_access_pdu_t * incoming_access_pdu_decrypted; 91 92 static mesh_access_pdu_t incoming_access_pdu_encrypted_singleton; 93 static mesh_access_pdu_t incoming_access_pdu_decrypted_singleton; 94 95 static mesh_control_pdu_t incoming_control_pdu_singleton; 96 static mesh_control_pdu_t * incoming_control_pdu; 97 98 // incoming unsegmented (network) and segmented (transport) control and access messages 99 static btstack_linked_list_t upper_transport_incoming; 100 101 // outgoing unsegmented and segmented control and access messages 102 static btstack_linked_list_t upper_transport_outgoing; 103 104 // outgoing upper transport messages that have been sent to lower transport and wait for sent event 105 static btstack_linked_list_t upper_transport_outgoing_active; 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 mesh_upper_transport_reset_pdus(&upper_transport_incoming); 271 } 272 273 static mesh_transport_key_t * mesh_upper_transport_get_outgoing_appkey(uint16_t netkey_index, uint16_t appkey_index){ 274 // Device Key is fixed 275 if (appkey_index == MESH_DEVICE_KEY_INDEX) { 276 return mesh_transport_key_get(appkey_index); 277 } 278 279 // Get key refresh state from subnet 280 mesh_subnet_t * subnet = mesh_subnet_get_by_netkey_index(netkey_index); 281 if (subnet == NULL) return NULL; 282 283 // identify old and new app keys for given appkey_index 284 mesh_transport_key_t * old_key = NULL; 285 mesh_transport_key_t * new_key = NULL; 286 mesh_transport_key_iterator_t it; 287 mesh_transport_key_iterator_init(&it, netkey_index); 288 while (mesh_transport_key_iterator_has_more(&it)){ 289 mesh_transport_key_t * transport_key = mesh_transport_key_iterator_get_next(&it); 290 if (transport_key->appkey_index != appkey_index) continue; 291 if (transport_key->old_key == 0) { 292 new_key = transport_key; 293 } else { 294 old_key = transport_key; 295 } 296 } 297 298 // if no key is marked as old, just use the current one 299 if (old_key == NULL) return new_key; 300 301 // use new key if it exists in phase two 302 if ((subnet->key_refresh == MESH_KEY_REFRESH_SECOND_PHASE) && (new_key != NULL)){ 303 return new_key; 304 } else { 305 return old_key; 306 } 307 } 308 309 static uint32_t iv_index_for_ivi_nid(uint8_t ivi_nid){ 310 // get IV Index and IVI 311 uint32_t iv_index = mesh_get_iv_index(); 312 int ivi = ivi_nid >> 7; 313 314 // if least significant bit differs, use previous IV Index 315 if ((iv_index & 1 ) ^ ivi){ 316 iv_index--; 317 } 318 return iv_index; 319 } 320 321 static void transport_segmented_setup_nonce(uint8_t * nonce, const mesh_pdu_t * pdu){ 322 mesh_access_pdu_t * access_pdu; 323 mesh_upper_transport_pdu_t * upper_pdu; 324 switch (pdu->pdu_type){ 325 case MESH_PDU_TYPE_ACCESS: 326 access_pdu = (mesh_access_pdu_t *) pdu; 327 nonce[1] = access_pdu->transmic_len == 8 ? 0x80 : 0x00; 328 (void)memcpy(&nonce[2], &access_pdu->network_header[2], 7); 329 big_endian_store_32(nonce, 9, iv_index_for_ivi_nid(access_pdu->network_header[0])); 330 break; 331 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 332 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 333 upper_pdu = (mesh_upper_transport_pdu_t *) pdu; 334 nonce[1] = upper_pdu->transmic_len == 8 ? 0x80 : 0x00; 335 // 'network header' 336 big_endian_store_24(nonce, 2, upper_pdu->seq); 337 big_endian_store_16(nonce, 5, upper_pdu->src); 338 big_endian_store_16(nonce, 7, upper_pdu->dst); 339 big_endian_store_32(nonce, 9, iv_index_for_ivi_nid(upper_pdu->ivi_nid)); 340 break; 341 default: 342 btstack_assert(0); 343 break; 344 } 345 } 346 347 static void transport_segmented_setup_application_nonce(uint8_t * nonce, const mesh_pdu_t * pdu){ 348 nonce[0] = 0x01; 349 transport_segmented_setup_nonce(nonce, pdu); 350 mesh_print_hex("AppNonce", nonce, 13); 351 } 352 353 static void transport_segmented_setup_device_nonce(uint8_t * nonce, const mesh_pdu_t * pdu){ 354 nonce[0] = 0x02; 355 transport_segmented_setup_nonce(nonce, pdu); 356 mesh_print_hex("DeviceNonce", nonce, 13); 357 } 358 359 static void mesh_upper_transport_process_access_message_done(mesh_access_pdu_t *access_pdu){ 360 crypto_active = 0; 361 btstack_assert(mesh_access_ctl(access_pdu) == 0); 362 incoming_access_pdu_encrypted = NULL; 363 mesh_upper_transport_run(); 364 } 365 366 static void mesh_upper_transport_process_control_message_done(mesh_control_pdu_t * control_pdu){ 367 crypto_active = 0; 368 incoming_control_pdu = NULL; 369 mesh_upper_transport_run(); 370 } 371 372 static void mesh_upper_transport_validate_segmented_message_ccm(void * arg){ 373 UNUSED(arg); 374 375 uint8_t * upper_transport_pdu = incoming_access_pdu_decrypted->data; 376 uint8_t upper_transport_pdu_len = incoming_access_pdu_decrypted->len - incoming_access_pdu_decrypted->transmic_len; 377 378 mesh_print_hex("Decrypted PDU", upper_transport_pdu, upper_transport_pdu_len); 379 380 // store TransMIC 381 uint8_t trans_mic[8]; 382 btstack_crypto_ccm_get_authentication_value(&ccm, trans_mic); 383 mesh_print_hex("TransMIC", trans_mic, incoming_access_pdu_decrypted->transmic_len); 384 385 if (memcmp(trans_mic, &upper_transport_pdu[upper_transport_pdu_len], incoming_access_pdu_decrypted->transmic_len) == 0){ 386 printf("TransMIC matches\n"); 387 388 // remove TransMIC from payload 389 incoming_access_pdu_decrypted->len -= incoming_access_pdu_decrypted->transmic_len; 390 391 // if virtual address, update dst to pseudo_dst 392 if (mesh_network_address_virtual(mesh_access_dst(incoming_access_pdu_decrypted))){ 393 big_endian_store_16(incoming_access_pdu_decrypted->network_header, 7, mesh_transport_key_it.address->pseudo_dst); 394 } 395 396 // pass to upper layer 397 btstack_assert(mesh_access_message_handler != NULL); 398 mesh_pdu_t * pdu = (mesh_pdu_t*) incoming_access_pdu_decrypted; 399 mesh_access_message_handler(MESH_TRANSPORT_PDU_RECEIVED, MESH_TRANSPORT_STATUS_SUCCESS, pdu); 400 401 printf("\n"); 402 403 } else { 404 uint8_t akf = incoming_access_pdu_decrypted->akf_aid_control & 0x40; 405 if (akf){ 406 printf("TransMIC does not match, try next key\n"); 407 mesh_upper_transport_validate_segmented_message(); 408 } else { 409 printf("TransMIC does not match device key, done\n"); 410 // done 411 mesh_upper_transport_process_access_message_done(incoming_access_pdu_decrypted); 412 } 413 } 414 } 415 416 static void mesh_upper_transport_validate_segmented_message_digest(void * arg){ 417 UNUSED(arg); 418 uint8_t upper_transport_pdu_len = incoming_access_pdu_encrypted->len - incoming_access_pdu_encrypted->transmic_len; 419 uint8_t * upper_transport_pdu_data_in = incoming_access_pdu_encrypted->data; 420 uint8_t * upper_transport_pdu_data_out = incoming_access_pdu_decrypted->data; 421 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); 422 } 423 424 static void mesh_upper_transport_validate_segmented_message(void){ 425 uint8_t * upper_transport_pdu_data = incoming_access_pdu_decrypted->data; 426 uint8_t upper_transport_pdu_len = incoming_access_pdu_decrypted->len - incoming_access_pdu_decrypted->transmic_len; 427 428 if (!mesh_transport_key_and_virtual_address_iterator_has_more(&mesh_transport_key_it)){ 429 printf("No valid transport key found\n"); 430 mesh_upper_transport_process_access_message_done(incoming_access_pdu_decrypted); 431 return; 432 } 433 mesh_transport_key_and_virtual_address_iterator_next(&mesh_transport_key_it); 434 const mesh_transport_key_t * message_key = mesh_transport_key_it.key; 435 436 if (message_key->akf){ 437 transport_segmented_setup_application_nonce(application_nonce, (mesh_pdu_t *) incoming_access_pdu_encrypted); 438 } else { 439 transport_segmented_setup_device_nonce(application_nonce, (mesh_pdu_t *) incoming_access_pdu_encrypted); 440 } 441 442 // store application / device key index 443 mesh_print_hex("AppOrDevKey", message_key->key, 16); 444 incoming_access_pdu_decrypted->appkey_index = message_key->appkey_index; 445 446 mesh_print_hex("EncAccessPayload", upper_transport_pdu_data, upper_transport_pdu_len); 447 448 // decrypt ccm 449 crypto_active = 1; 450 uint16_t aad_len = 0; 451 if (mesh_network_address_virtual(mesh_access_dst(incoming_access_pdu_decrypted))){ 452 aad_len = 16; 453 } 454 btstack_crypto_ccm_init(&ccm, message_key->key, application_nonce, upper_transport_pdu_len, aad_len, incoming_access_pdu_decrypted->transmic_len); 455 456 if (aad_len){ 457 btstack_crypto_ccm_digest(&ccm, (uint8_t *) mesh_transport_key_it.address->label_uuid, aad_len, &mesh_upper_transport_validate_segmented_message_digest, NULL); 458 } else { 459 mesh_upper_transport_validate_segmented_message_digest(NULL); 460 } 461 } 462 463 static void mesh_upper_transport_process_segmented_message(void){ 464 // copy original pdu 465 (void)memcpy(incoming_access_pdu_decrypted, incoming_access_pdu_encrypted, 466 sizeof(mesh_access_pdu_t)); 467 468 // 469 uint8_t * upper_transport_pdu = incoming_access_pdu_decrypted->data; 470 uint8_t upper_transport_pdu_len = incoming_access_pdu_decrypted->len - incoming_access_pdu_decrypted->transmic_len; 471 mesh_print_hex("Upper Transport pdu", upper_transport_pdu, upper_transport_pdu_len); 472 473 uint8_t aid = incoming_access_pdu_decrypted->akf_aid_control & 0x3f; 474 uint8_t akf = (incoming_access_pdu_decrypted->akf_aid_control & 0x40) >> 6; 475 476 printf("AKF: %u\n", akf); 477 printf("AID: %02x\n", aid); 478 479 mesh_transport_key_and_virtual_address_iterator_init(&mesh_transport_key_it, mesh_access_dst(incoming_access_pdu_decrypted), 480 incoming_access_pdu_decrypted->netkey_index, akf, aid); 481 mesh_upper_transport_validate_segmented_message(); 482 } 483 484 static void mesh_upper_transport_message_received(mesh_pdu_t * pdu){ 485 btstack_linked_list_add_tail(&upper_transport_incoming, (btstack_linked_item_t*) pdu); 486 mesh_upper_transport_run(); 487 } 488 489 static void mesh_upper_transport_send_access_segmented(mesh_upper_transport_pdu_t * upper_pdu){ 490 491 mesh_segmented_pdu_t * segmented_pdu = (mesh_segmented_pdu_t *) upper_pdu->lower_pdu; 492 segmented_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_SEGMENTED; 493 494 // convert mesh_access_pdu_t into mesh_segmented_pdu_t 495 mesh_segmented_append_payload(crypto_buffer, upper_pdu->len, &segmented_pdu->segments); 496 497 // copy meta 498 segmented_pdu->len = upper_pdu->len; 499 segmented_pdu->netkey_index = upper_pdu->netkey_index; 500 segmented_pdu->transmic_len = upper_pdu->transmic_len; 501 segmented_pdu->akf_aid_control = upper_pdu->akf_aid_control; 502 segmented_pdu->flags = upper_pdu->flags; 503 504 // setup segmented_pdu header 505 // (void)memcpy(segmented_pdu->network_header, upper_pdu->network_header, 9); 506 // TODO: use fields in mesh_segmented_pdu_t and setup network header in lower transport 507 segmented_pdu->network_header[0] = upper_pdu->ivi_nid; 508 segmented_pdu->network_header[1] = upper_pdu->ctl_ttl; 509 big_endian_store_24(segmented_pdu->network_header, 2, upper_pdu->seq); 510 big_endian_store_16(segmented_pdu->network_header, 5, upper_pdu->src); 511 big_endian_store_16(segmented_pdu->network_header, 7, upper_pdu->dst); 512 513 // queue up 514 upper_pdu->lower_pdu = (mesh_pdu_t *) segmented_pdu; 515 btstack_linked_list_add(&upper_transport_outgoing_active, (btstack_linked_item_t *) upper_pdu); 516 517 mesh_lower_transport_send_pdu((mesh_pdu_t*) segmented_pdu); 518 } 519 520 static void mesh_upper_transport_send_access_unsegmented(mesh_upper_transport_pdu_t * upper_pdu){ 521 522 // provide segment 523 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) upper_pdu->lower_pdu; 524 525 // setup network pdu 526 network_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS; 527 network_pdu->data[0] = upper_pdu->ivi_nid; 528 network_pdu->data[1] = upper_pdu->ctl_ttl; 529 big_endian_store_24(network_pdu->data, 2, upper_pdu->seq); 530 big_endian_store_16(network_pdu->data, 5, upper_pdu->src); 531 big_endian_store_16(network_pdu->data, 7, upper_pdu->dst); 532 network_pdu->netkey_index = upper_pdu->netkey_index; 533 534 // setup access message 535 network_pdu->data[9] = upper_pdu->akf_aid_control; 536 btstack_assert(upper_pdu->len < 15); 537 (void)memcpy(&network_pdu->data[10], crypto_buffer, upper_pdu->len); 538 network_pdu->len = 10 + upper_pdu->len; 539 network_pdu->flags = 0; 540 541 // queue up 542 btstack_linked_list_add(&upper_transport_outgoing_active, (btstack_linked_item_t *) upper_pdu); 543 544 mesh_lower_transport_send_pdu((mesh_pdu_t*) network_pdu); 545 } 546 547 static void mesh_upper_transport_send_access_ccm(void * arg){ 548 crypto_active = 0; 549 550 mesh_upper_transport_pdu_t * upper_pdu = (mesh_upper_transport_pdu_t *) arg; 551 mesh_print_hex("EncAccessPayload", crypto_buffer, upper_pdu->len); 552 // store TransMIC 553 btstack_crypto_ccm_get_authentication_value(&ccm, &crypto_buffer[upper_pdu->len]); 554 mesh_print_hex("TransMIC", &crypto_buffer[upper_pdu->len], upper_pdu->transmic_len); 555 upper_pdu->len += upper_pdu->transmic_len; 556 mesh_print_hex("UpperTransportPDU", crypto_buffer, upper_pdu->len); 557 switch (upper_pdu->pdu_header.pdu_type){ 558 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 559 mesh_upper_transport_send_access_unsegmented(upper_pdu); 560 break; 561 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 562 mesh_upper_transport_send_access_segmented(upper_pdu); 563 break; 564 default: 565 btstack_assert(false); 566 } 567 } 568 569 static void mesh_upper_transport_send_access_digest(void *arg){ 570 mesh_upper_transport_pdu_t * upper_pdu = (mesh_upper_transport_pdu_t *) arg; 571 uint16_t access_pdu_len = upper_pdu->len; 572 btstack_crypto_ccm_encrypt_block(&ccm, access_pdu_len, crypto_buffer, crypto_buffer, 573 &mesh_upper_transport_send_access_ccm, upper_pdu); 574 } 575 576 static void mesh_upper_transport_send_access(mesh_upper_transport_pdu_t * upper_pdu){ 577 578 // if dst is virtual address, lookup label uuid and hash 579 uint16_t aad_len = 0; 580 mesh_virtual_address_t * virtual_address = NULL; 581 if (mesh_network_address_virtual(upper_pdu->dst)){ 582 virtual_address = mesh_virtual_address_for_pseudo_dst(upper_pdu->dst); 583 if (!virtual_address){ 584 printf("No virtual address register for pseudo dst %4x\n", upper_pdu->dst); 585 mesh_access_message_handler(MESH_TRANSPORT_PDU_SENT, MESH_TRANSPORT_STATUS_SEND_FAILED, (mesh_pdu_t *) upper_pdu); 586 return; 587 } 588 // printf("Using hash %4x with LabelUUID: ", virtual_address->hash); 589 // printf_hexdump(virtual_address->label_uuid, 16); 590 aad_len = 16; 591 upper_pdu->dst = virtual_address->hash; 592 } 593 594 // get app or device key 595 uint16_t appkey_index = upper_pdu->appkey_index; 596 const mesh_transport_key_t * appkey = mesh_upper_transport_get_outgoing_appkey(upper_pdu->netkey_index, appkey_index); 597 if (appkey == NULL){ 598 printf("AppKey %04x not found, drop message\n", appkey_index); 599 mesh_access_message_handler(MESH_TRANSPORT_PDU_SENT, MESH_TRANSPORT_STATUS_SEND_FAILED, (mesh_pdu_t *) upper_pdu); 600 return; 601 } 602 603 // reserve slot 604 mesh_lower_transport_reserve_slot(); 605 606 // reserve one sequence number, which is also used to encrypt access payload 607 uint32_t seq = mesh_sequence_number_next(); 608 upper_pdu->flags |= MESH_TRANSPORT_FLAG_SEQ_RESERVED; 609 upper_pdu->seq = seq; 610 611 // also reserves crypto_buffer 612 crypto_active = 1; 613 614 // flatten segmented pdu into crypto buffer 615 uint16_t payload_len = mesh_upper_pdu_flatten(upper_pdu, crypto_buffer, sizeof(crypto_buffer)); 616 btstack_assert(payload_len == upper_pdu->len); 617 618 // Dump PDU 619 printf("[+] Upper transport, send upper (un)segmented Access PDU - dest %04x, seq %06x\n", upper_pdu->dst, upper_pdu->seq); 620 mesh_print_hex("Access Payload", crypto_buffer, upper_pdu->len); 621 622 // setup nonce - uses dst, so after pseudo address translation 623 if (appkey_index == MESH_DEVICE_KEY_INDEX){ 624 transport_segmented_setup_device_nonce(application_nonce, (mesh_pdu_t *) upper_pdu); 625 } else { 626 transport_segmented_setup_application_nonce(application_nonce, (mesh_pdu_t *) upper_pdu); 627 } 628 629 // Dump key 630 mesh_print_hex("AppOrDevKey", appkey->key, 16); 631 632 // encrypt ccm 633 uint8_t transmic_len = upper_pdu->transmic_len; 634 uint16_t access_pdu_len = upper_pdu->len; 635 btstack_crypto_ccm_init(&ccm, appkey->key, application_nonce, access_pdu_len, aad_len, transmic_len); 636 if (virtual_address){ 637 mesh_print_hex("LabelUUID", virtual_address->label_uuid, 16); 638 btstack_crypto_ccm_digest(&ccm, virtual_address->label_uuid, 16, 639 &mesh_upper_transport_send_access_digest, upper_pdu); 640 } else { 641 mesh_upper_transport_send_access_digest(upper_pdu); 642 } 643 } 644 645 static void mesh_upper_transport_send_unsegmented_control_pdu(mesh_network_pdu_t * network_pdu){ 646 // reserve slot 647 mesh_lower_transport_reserve_slot(); 648 // reserve sequence number 649 uint32_t seq = mesh_sequence_number_next(); 650 mesh_network_pdu_set_seq(network_pdu, seq); 651 // Dump PDU 652 uint8_t opcode = network_pdu->data[9]; 653 printf("[+] Upper transport, send unsegmented Control PDU %p - seq %06x opcode %02x\n", network_pdu, seq, opcode); 654 mesh_print_hex("Access Payload", &network_pdu->data[10], network_pdu->len - 10); 655 656 // send 657 mesh_lower_transport_send_pdu((mesh_pdu_t *) network_pdu); 658 } 659 660 static void mesh_upper_transport_send_segmented_control_pdu(mesh_upper_transport_pdu_t * upper_pdu){ 661 // reserve slot 662 mesh_lower_transport_reserve_slot(); 663 // reserve sequence number 664 uint32_t seq = mesh_sequence_number_next(); 665 upper_pdu->flags |= MESH_TRANSPORT_FLAG_SEQ_RESERVED; 666 upper_pdu->seq = seq; 667 // Dump PDU 668 // uint8_t opcode = upper_pdu->data[0]; 669 // printf("[+] Upper transport, send segmented Control PDU %p - seq %06x opcode %02x\n", upper_pdu, seq, opcode); 670 // mesh_print_hex("Access Payload", &upper_pdu->data[1], upper_pdu->len - 1); 671 // send 672 mesh_segmented_pdu_t * segmented_pdu = (mesh_segmented_pdu_t *) upper_pdu->lower_pdu; 673 segmented_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_SEGMENTED; 674 675 // lend segments to lower transport pdu 676 segmented_pdu->segments = upper_pdu->segments; 677 upper_pdu->segments = NULL; 678 679 // copy meta 680 segmented_pdu->len = upper_pdu->len; 681 segmented_pdu->netkey_index = upper_pdu->netkey_index; 682 segmented_pdu->transmic_len = 0; // no TransMIC for control 683 segmented_pdu->akf_aid_control = upper_pdu->akf_aid_control; 684 segmented_pdu->flags = upper_pdu->flags; 685 686 // setup segmented_pdu header 687 // TODO: use fields in mesh_segmented_pdu_t and setup network header in lower transport 688 segmented_pdu->network_header[0] = upper_pdu->ivi_nid; 689 segmented_pdu->network_header[1] = upper_pdu->ctl_ttl; 690 big_endian_store_24(segmented_pdu->network_header, 2, upper_pdu->seq); 691 big_endian_store_16(segmented_pdu->network_header, 5, upper_pdu->src); 692 big_endian_store_16(segmented_pdu->network_header, 7, upper_pdu->dst); 693 694 // queue up 695 upper_pdu->lower_pdu = (mesh_pdu_t *) segmented_pdu; 696 btstack_linked_list_add(&upper_transport_outgoing_active, (btstack_linked_item_t *) upper_pdu); 697 698 mesh_lower_transport_send_pdu((mesh_pdu_t *) segmented_pdu); 699 } 700 701 static void mesh_upper_transport_run(void){ 702 703 while(!btstack_linked_list_empty(&upper_transport_incoming)){ 704 705 if (crypto_active) return; 706 707 // get next message 708 mesh_pdu_t * pdu = (mesh_pdu_t *) btstack_linked_list_pop(&upper_transport_incoming); 709 mesh_network_pdu_t * network_pdu; 710 mesh_segmented_pdu_t * message_pdu; 711 switch (pdu->pdu_type){ 712 case MESH_PDU_TYPE_UNSEGMENTED: 713 network_pdu = (mesh_network_pdu_t *) pdu; 714 // control? 715 if (mesh_network_control(network_pdu)) { 716 717 incoming_control_pdu = &incoming_control_pdu_singleton; 718 incoming_control_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_CONTROL; 719 incoming_control_pdu->len = network_pdu->len; 720 incoming_control_pdu->netkey_index = network_pdu->netkey_index; 721 722 uint8_t * lower_transport_pdu = mesh_network_pdu_data(network_pdu); 723 724 incoming_control_pdu->akf_aid_control = lower_transport_pdu[0]; 725 incoming_control_pdu->len = network_pdu->len - 10; // 9 header + 1 opcode 726 (void)memcpy(incoming_control_pdu->data, &lower_transport_pdu[1], incoming_control_pdu->len); 727 728 // copy meta data into encrypted pdu buffer 729 (void)memcpy(incoming_control_pdu->network_header, network_pdu->data, 9); 730 731 mesh_print_hex("Assembled payload", incoming_control_pdu->data, incoming_control_pdu->len); 732 733 // free mesh message 734 mesh_lower_transport_message_processed_by_higher_layer(pdu); 735 736 btstack_assert(mesh_control_message_handler != NULL); 737 mesh_pdu_t * pdu = (mesh_pdu_t*) incoming_control_pdu; 738 mesh_control_message_handler(MESH_TRANSPORT_PDU_RECEIVED, MESH_TRANSPORT_STATUS_SUCCESS, pdu); 739 740 } else { 741 742 incoming_access_pdu_encrypted = &incoming_access_pdu_encrypted_singleton; 743 incoming_access_pdu_encrypted->pdu_header.pdu_type = MESH_PDU_TYPE_ACCESS; 744 incoming_access_pdu_decrypted = &incoming_access_pdu_decrypted_singleton; 745 746 incoming_access_pdu_encrypted->netkey_index = network_pdu->netkey_index; 747 incoming_access_pdu_encrypted->transmic_len = 4; 748 749 uint8_t * lower_transport_pdu = mesh_network_pdu_data(network_pdu); 750 751 incoming_access_pdu_encrypted->akf_aid_control = lower_transport_pdu[0]; 752 incoming_access_pdu_encrypted->len = network_pdu->len - 10; // 9 header + 1 AID 753 (void)memcpy(incoming_access_pdu_encrypted->data, &lower_transport_pdu[1], incoming_access_pdu_encrypted->len); 754 755 // copy meta data into encrypted pdu buffer 756 (void)memcpy(incoming_access_pdu_encrypted->network_header, network_pdu->data, 9); 757 758 mesh_print_hex("Assembled payload", incoming_access_pdu_encrypted->data, incoming_access_pdu_encrypted->len); 759 760 // free mesh message 761 mesh_lower_transport_message_processed_by_higher_layer(pdu); 762 763 // get encoded transport pdu and start processing 764 mesh_upper_transport_process_segmented_message(); 765 } 766 break; 767 case MESH_PDU_TYPE_SEGMENTED: 768 message_pdu = (mesh_segmented_pdu_t *) pdu; 769 uint8_t ctl = mesh_message_ctl(message_pdu); 770 if (ctl){ 771 incoming_control_pdu= &incoming_control_pdu_singleton; 772 incoming_control_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_CONTROL; 773 774 // flatten 775 mesh_segmented_pdu_flatten(&message_pdu->segments, 8, incoming_control_pdu->data); 776 777 // copy meta data into encrypted pdu buffer 778 incoming_control_pdu->len = message_pdu->len; 779 incoming_control_pdu->netkey_index = message_pdu->netkey_index; 780 incoming_control_pdu->akf_aid_control = message_pdu->akf_aid_control; 781 incoming_control_pdu->flags = 0; 782 (void)memcpy(incoming_control_pdu->network_header, message_pdu->network_header, 9); 783 784 mesh_print_hex("Assembled payload", incoming_control_pdu->data, incoming_control_pdu->len); 785 786 // free mesh message 787 mesh_lower_transport_message_processed_by_higher_layer((mesh_pdu_t *)message_pdu); 788 789 btstack_assert(mesh_control_message_handler != NULL); 790 mesh_pdu_t * pdu = (mesh_pdu_t*) incoming_control_pdu; 791 mesh_access_message_handler(MESH_TRANSPORT_PDU_RECEIVED, MESH_TRANSPORT_STATUS_SUCCESS, pdu); 792 793 } else { 794 795 incoming_access_pdu_encrypted = &incoming_access_pdu_encrypted_singleton; 796 incoming_access_pdu_encrypted->pdu_header.pdu_type = MESH_PDU_TYPE_ACCESS; 797 incoming_access_pdu_decrypted = &incoming_access_pdu_decrypted_singleton; 798 799 // flatten 800 mesh_segmented_pdu_flatten(&message_pdu->segments, 12, incoming_access_pdu_encrypted->data); 801 802 // copy meta data into encrypted pdu buffer 803 incoming_access_pdu_encrypted->len = message_pdu->len; 804 incoming_access_pdu_encrypted->netkey_index = message_pdu->netkey_index; 805 incoming_access_pdu_encrypted->transmic_len = message_pdu->transmic_len; 806 incoming_access_pdu_encrypted->akf_aid_control = message_pdu->akf_aid_control; 807 (void)memcpy(incoming_access_pdu_encrypted->network_header, message_pdu->network_header, 9); 808 809 mesh_print_hex("Assembled payload", incoming_access_pdu_encrypted->data, incoming_access_pdu_encrypted->len); 810 811 // free mesh message 812 mesh_lower_transport_message_processed_by_higher_layer((mesh_pdu_t *)message_pdu); 813 814 // get encoded transport pdu and start processing 815 mesh_upper_transport_process_segmented_message(); 816 } 817 break; 818 default: 819 btstack_assert(0); 820 break; 821 } 822 } 823 824 while (!btstack_linked_list_empty(&upper_transport_outgoing)){ 825 826 if (crypto_active) 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 mesh_upper_transport_pdu_t * upper_pdu; 832 833 switch (pdu->pdu_type){ 834 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_CONTROL: 835 // control pdus can go through directly 836 btstack_assert(mesh_pdu_ctl(pdu) != 0); 837 (void) btstack_linked_list_pop(&upper_transport_outgoing); 838 mesh_upper_transport_send_unsegmented_control_pdu((mesh_network_pdu_t *) pdu); 839 break; 840 case MESH_PDU_TYPE_UPPER_SEGMENTED_CONTROL: 841 // control pdus can go through directly 842 btstack_assert(mesh_pdu_ctl(pdu) != 0); 843 (void) btstack_linked_list_pop(&upper_transport_outgoing); 844 mesh_upper_transport_send_segmented_control_pdu((mesh_upper_transport_pdu_t *) pdu); 845 break; 846 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 847 // segmented access pdus required a mesh-segmented-pdu 848 upper_pdu = (mesh_upper_transport_pdu_t *) pdu; 849 if (upper_pdu->lower_pdu == NULL){ 850 upper_pdu->lower_pdu = (mesh_pdu_t *) btstack_memory_mesh_segmented_pdu_get(); 851 } 852 if (upper_pdu->lower_pdu == NULL) break; 853 upper_pdu->lower_pdu->pdu_type = MESH_PDU_TYPE_SEGMENTED; 854 // and a mesh-network-pdu for each segments 855 // TODO: reserve segments 856 (void) btstack_linked_list_pop(&upper_transport_outgoing); 857 mesh_upper_transport_send_access(upper_pdu); 858 break; 859 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 860 // unsegmented access pdus require a single mesh-network-dpu 861 upper_pdu = (mesh_upper_transport_pdu_t *) pdu; 862 if (upper_pdu->lower_pdu == NULL){ 863 upper_pdu->lower_pdu = (mesh_pdu_t *) mesh_network_pdu_get(); 864 } 865 if (upper_pdu->lower_pdu == NULL) break; 866 (void) btstack_linked_list_pop(&upper_transport_outgoing); 867 mesh_upper_transport_send_access((mesh_upper_transport_pdu_t *) pdu); 868 break; 869 default: 870 btstack_assert(false); 871 break; 872 } 873 } 874 } 875 876 static mesh_upper_transport_pdu_t * mesh_upper_transport_find_pdu_for_lower(mesh_pdu_t * pdu_to_find){ 877 btstack_linked_list_iterator_t it; 878 btstack_linked_list_iterator_init(&it, &upper_transport_outgoing_active); 879 mesh_upper_transport_pdu_t * upper_pdu; 880 while (btstack_linked_list_iterator_has_next(&it)){ 881 mesh_pdu_t * mesh_pdu = (mesh_pdu_t *) btstack_linked_list_iterator_next(&it); 882 switch (mesh_pdu->pdu_type){ 883 case MESH_PDU_TYPE_UPPER_SEGMENTED_CONTROL: 884 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 885 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 886 upper_pdu = (mesh_upper_transport_pdu_t *) mesh_pdu; 887 if (upper_pdu->lower_pdu == pdu_to_find){ 888 btstack_linked_list_iterator_remove(&it); 889 return upper_pdu; 890 } 891 break; 892 default: 893 break; 894 } 895 } 896 return NULL; 897 } 898 899 static void mesh_upper_transport_pdu_handler(mesh_transport_callback_type_t callback_type, mesh_transport_status_t status, mesh_pdu_t * pdu){ 900 mesh_upper_transport_pdu_t * upper_pdu; 901 mesh_network_pdu_t * network_pdu; 902 mesh_segmented_pdu_t * segmented_pdu; 903 switch (callback_type){ 904 case MESH_TRANSPORT_PDU_RECEIVED: 905 mesh_upper_transport_message_received(pdu); 906 break; 907 case MESH_TRANSPORT_PDU_SENT: 908 switch (pdu->pdu_type){ 909 case MESH_PDU_TYPE_SEGMENTED: 910 // try to find in outgoing active 911 upper_pdu = mesh_upper_transport_find_pdu_for_lower(pdu); 912 btstack_assert(upper_pdu != NULL); 913 segmented_pdu = (mesh_segmented_pdu_t *) pdu; 914 // free chunks 915 while (!btstack_linked_list_empty(&segmented_pdu->segments)){ 916 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&segmented_pdu->segments); 917 mesh_network_pdu_free(network_pdu); 918 } 919 // free segmented pdu 920 btstack_memory_mesh_segmented_pdu_free(segmented_pdu); 921 // TODO: free segmented_pdu 922 upper_pdu->lower_pdu = NULL; 923 switch (upper_pdu->pdu_header.pdu_type){ 924 case MESH_PDU_TYPE_UPPER_SEGMENTED_CONTROL: 925 mesh_control_message_handler(callback_type, status, (mesh_pdu_t *) upper_pdu); 926 break; 927 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 928 mesh_access_message_handler(callback_type, status, (mesh_pdu_t *) upper_pdu); 929 break; 930 default: 931 btstack_assert(false); 932 break; 933 } 934 break; 935 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 936 // find corresponding upper transport pdu and free single segment 937 upper_pdu = mesh_upper_transport_find_pdu_for_lower(pdu); 938 btstack_assert(upper_pdu != NULL); 939 btstack_assert(upper_pdu->lower_pdu == (mesh_pdu_t *) pdu); 940 mesh_network_pdu_free((mesh_network_pdu_t *) pdu); 941 upper_pdu->lower_pdu = NULL; 942 mesh_access_message_handler(callback_type, status, (mesh_pdu_t*) upper_pdu); 943 break; 944 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_CONTROL: 945 mesh_access_message_handler(callback_type, status, pdu); 946 break; 947 default: 948 btstack_assert(false); 949 break; 950 } 951 mesh_upper_transport_run(); 952 break; 953 default: 954 break; 955 } 956 } 957 958 void mesh_upper_transport_pdu_free(mesh_pdu_t * pdu){ 959 mesh_network_pdu_t * network_pdu; 960 mesh_segmented_pdu_t * message_pdu; 961 switch (pdu->pdu_type) { 962 case MESH_PDU_TYPE_NETWORK: 963 network_pdu = (mesh_network_pdu_t *) pdu; 964 mesh_network_pdu_free(network_pdu); 965 break; 966 case MESH_PDU_TYPE_SEGMENTED: 967 message_pdu = (mesh_segmented_pdu_t *) pdu; 968 mesh_message_pdu_free(message_pdu); 969 default: 970 btstack_assert(false); 971 break; 972 } 973 } 974 975 void mesh_upper_transport_message_processed_by_higher_layer(mesh_pdu_t * pdu){ 976 crypto_active = 0; 977 switch (pdu->pdu_type){ 978 case MESH_PDU_TYPE_ACCESS: 979 mesh_upper_transport_process_access_message_done((mesh_access_pdu_t *) pdu); 980 case MESH_PDU_TYPE_CONTROL: 981 mesh_upper_transport_process_control_message_done((mesh_control_pdu_t *) pdu); 982 break; 983 default: 984 btstack_assert(0); 985 break; 986 } 987 } 988 989 void mesh_upper_transport_send_access_pdu(mesh_pdu_t *pdu){ 990 switch (pdu->pdu_type){ 991 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 992 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 993 break; 994 default: 995 btstack_assert(false); 996 break; 997 } 998 999 btstack_assert(((mesh_upper_transport_pdu_t *) pdu)->lower_pdu == NULL); 1000 1001 btstack_linked_list_add_tail(&upper_transport_outgoing, (btstack_linked_item_t*) pdu); 1002 mesh_upper_transport_run(); 1003 } 1004 1005 void mesh_upper_transport_send_control_pdu(mesh_pdu_t * pdu){ 1006 switch (pdu->pdu_type){ 1007 case MESH_PDU_TYPE_UPPER_SEGMENTED_CONTROL: 1008 break; 1009 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_CONTROL: 1010 btstack_assert( ((mesh_network_pdu_t *) pdu)->len >= 9); 1011 break; 1012 default: 1013 btstack_assert(false); 1014 break; 1015 } 1016 1017 btstack_linked_list_add_tail(&upper_transport_outgoing, (btstack_linked_item_t*) pdu); 1018 mesh_upper_transport_run(); 1019 } 1020 1021 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, 1022 const uint8_t * control_pdu_data, uint16_t control_pdu_len){ 1023 1024 if (control_pdu_len > 11) return 1; 1025 1026 const mesh_network_key_t * network_key = mesh_network_key_list_get(netkey_index); 1027 if (!network_key) return 1; 1028 1029 uint8_t transport_pdu_data[12]; 1030 transport_pdu_data[0] = opcode; 1031 (void)memcpy(&transport_pdu_data[1], control_pdu_data, control_pdu_len); 1032 uint16_t transport_pdu_len = control_pdu_len + 1; 1033 1034 // setup network_pdu 1035 mesh_network_setup_pdu(network_pdu, netkey_index, network_key->nid, 1, ttl, 0, src, dest, transport_pdu_data, transport_pdu_len); 1036 1037 return 0; 1038 } 1039 1040 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, 1041 const uint8_t * control_pdu_data, uint16_t control_pdu_len){ 1042 1043 if (control_pdu_len > 256) return 1; 1044 1045 const mesh_network_key_t * network_key = mesh_network_key_list_get(netkey_index); 1046 if (!network_key) return 1; 1047 1048 upper_pdu->ivi_nid = network_key->nid | ((mesh_get_iv_index_for_tx() & 1) << 7); 1049 upper_pdu->ctl_ttl = ttl; 1050 upper_pdu->src = src; 1051 upper_pdu->dst = dest; 1052 upper_pdu->transmic_len = 0; // no TransMIC for control 1053 upper_pdu->netkey_index = netkey_index; 1054 upper_pdu->akf_aid_control = opcode; 1055 1056 mesh_segmented_append_payload(control_pdu_data, control_pdu_len, &upper_pdu->segments); 1057 upper_pdu->len = control_pdu_len; 1058 return 0; 1059 } 1060 1061 uint8_t mesh_upper_transport_setup_control_pdu(mesh_pdu_t * pdu, uint16_t netkey_index, 1062 uint8_t ttl, uint16_t src, uint16_t dest, uint8_t opcode, const uint8_t * control_pdu_data, uint16_t control_pdu_len){ 1063 switch (pdu->pdu_type){ 1064 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_CONTROL: 1065 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); 1066 case MESH_PDU_TYPE_UPPER_SEGMENTED_CONTROL: 1067 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); 1068 default: 1069 btstack_assert(0); 1070 return 1; 1071 } 1072 } 1073 1074 static uint8_t mesh_upper_transport_setup_segmented_access_pdu_header(mesh_access_pdu_t * access_pdu, uint16_t netkey_index, 1075 uint16_t appkey_index, uint8_t ttl, uint16_t src, uint16_t dest, uint8_t szmic){ 1076 1077 // get app or device key 1078 const mesh_transport_key_t *appkey; 1079 appkey = mesh_transport_key_get(appkey_index); 1080 if (appkey == NULL) { 1081 printf("[!] Upper transport, setup segmented Access PDU - appkey_index %x unknown\n", appkey_index); 1082 return 1; 1083 } 1084 uint8_t akf_aid = (appkey->akf << 6) | appkey->aid; 1085 1086 // lookup network by netkey_index 1087 const mesh_network_key_t *network_key = mesh_network_key_list_get(netkey_index); 1088 if (!network_key) return 1; 1089 if (network_key == NULL) { 1090 printf("[!] Upper transport, setup segmented Access PDU - netkey_index %x unknown\n", appkey_index); 1091 return 1; 1092 } 1093 1094 const uint8_t trans_mic_len = szmic ? 8 : 4; 1095 1096 // store in transport pdu 1097 access_pdu->transmic_len = trans_mic_len; 1098 access_pdu->netkey_index = netkey_index; 1099 access_pdu->appkey_index = appkey_index; 1100 access_pdu->akf_aid_control = akf_aid; 1101 mesh_access_set_nid_ivi(access_pdu, network_key->nid | ((mesh_get_iv_index_for_tx() & 1) << 7)); 1102 mesh_access_set_src(access_pdu, src); 1103 mesh_access_set_dest(access_pdu, dest); 1104 mesh_access_set_ctl_ttl(access_pdu, ttl); 1105 return 0; 1106 } 1107 1108 static uint8_t mesh_upper_transport_setup_upper_access_pdu_header(mesh_upper_transport_pdu_t * upper_pdu, uint16_t netkey_index, 1109 uint16_t appkey_index, uint8_t ttl, uint16_t src, uint16_t dest, uint8_t szmic){ 1110 1111 // get app or device key 1112 const mesh_transport_key_t *appkey; 1113 appkey = mesh_transport_key_get(appkey_index); 1114 if (appkey == NULL) { 1115 printf("[!] Upper transport, setup segmented Access PDU - appkey_index %x unknown\n", appkey_index); 1116 return 1; 1117 } 1118 uint8_t akf_aid = (appkey->akf << 6) | appkey->aid; 1119 1120 // lookup network by netkey_index 1121 const mesh_network_key_t *network_key = mesh_network_key_list_get(netkey_index); 1122 if (!network_key) return 1; 1123 if (network_key == NULL) { 1124 printf("[!] Upper transport, setup segmented Access PDU - netkey_index %x unknown\n", appkey_index); 1125 return 1; 1126 } 1127 1128 const uint8_t trans_mic_len = szmic ? 8 : 4; 1129 1130 // store in transport pdu 1131 upper_pdu->ivi_nid = network_key->nid | ((mesh_get_iv_index_for_tx() & 1) << 7); 1132 upper_pdu->ctl_ttl = ttl; 1133 upper_pdu->src = src; 1134 upper_pdu->dst = dest; 1135 upper_pdu->transmic_len = trans_mic_len; 1136 upper_pdu->netkey_index = netkey_index; 1137 upper_pdu->appkey_index = appkey_index; 1138 upper_pdu->akf_aid_control = akf_aid; 1139 return 0; 1140 } 1141 1142 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, 1143 uint8_t szmic, const uint8_t * access_pdu_data, uint8_t access_pdu_len){ 1144 int status = mesh_upper_transport_setup_upper_access_pdu_header(upper_pdu, netkey_index, appkey_index, ttl, src, 1145 dest, szmic); 1146 if (status) return status; 1147 1148 // store in transport pdu 1149 mesh_segmented_append_payload(access_pdu_data, access_pdu_len, &upper_pdu->segments); 1150 upper_pdu->len = access_pdu_len; 1151 return 0; 1152 } 1153 1154 1155 uint8_t mesh_upper_transport_setup_access_pdu_header(mesh_pdu_t * pdu, uint16_t netkey_index, uint16_t appkey_index, 1156 uint8_t ttl, uint16_t src, uint16_t dest, uint8_t szmic){ 1157 switch (pdu->pdu_type){ 1158 case MESH_PDU_TYPE_ACCESS: 1159 return mesh_upper_transport_setup_segmented_access_pdu_header((mesh_access_pdu_t *) pdu, netkey_index, appkey_index, ttl, src, dest, szmic); 1160 default: 1161 btstack_assert(false); 1162 return 1; 1163 } 1164 } 1165 1166 uint8_t mesh_upper_transport_setup_access_pdu(mesh_pdu_t * pdu, uint16_t netkey_index, uint16_t appkey_index, 1167 uint8_t ttl, uint16_t src, uint16_t dest, uint8_t szmic, 1168 const uint8_t * access_pdu_data, uint8_t access_pdu_len){ 1169 switch (pdu->pdu_type){ 1170 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 1171 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 1172 return mesh_upper_transport_setup_upper_access_pdu((mesh_upper_transport_pdu_t *) pdu, netkey_index, 1173 appkey_index, ttl, src, dest, szmic, access_pdu_data, 1174 access_pdu_len); 1175 default: 1176 btstack_assert(false); 1177 return 1; 1178 } 1179 } 1180 1181 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)) { 1182 mesh_access_message_handler = callback; 1183 } 1184 1185 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)){ 1186 mesh_control_message_handler = callback; 1187 } 1188 1189 void mesh_upper_transport_init(){ 1190 mesh_lower_transport_set_higher_layer_handler(&mesh_upper_transport_pdu_handler); 1191 } 1192