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 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 and segmented control and access messages 104 static btstack_linked_list_t upper_transport_outgoing; 105 106 // outgoing upper transport messages that have been sent to lower transport and wait for sent event 107 static btstack_linked_list_t upper_transport_outgoing_active; 108 109 // TODO: higher layer define used for assert 110 #define MESH_ACCESS_OPCODE_NOT_SET 0xFFFFFFFEu 111 112 static void mesh_print_hex(const char * name, const uint8_t * data, uint16_t len){ 113 printf("%-20s ", name); 114 printf_hexdump(data, len); 115 } 116 // static void mesh_print_x(const char * name, uint32_t value){ 117 // printf("%20s: 0x%x", name, (int) value); 118 // } 119 120 static void mesh_transport_key_and_virtual_address_iterator_init(mesh_transport_key_and_virtual_address_iterator_t *it, 121 uint16_t dst, uint16_t netkey_index, uint8_t akf, 122 uint8_t aid) { 123 printf("KEY_INIT: dst %04x, akf %x, aid %x\n", dst, akf, aid); 124 // config 125 it->dst = dst; 126 // init elements 127 it->key = NULL; 128 it->address = NULL; 129 // init element iterators 130 mesh_transport_key_aid_iterator_init(&it->key_it, netkey_index, akf, aid); 131 // init address iterator 132 if (mesh_network_address_virtual(it->dst)){ 133 mesh_virtual_address_iterator_init(&it->address_it, dst); 134 // get first key 135 if (mesh_transport_key_aid_iterator_has_more(&it->key_it)) { 136 it->key = mesh_transport_key_aid_iterator_get_next(&it->key_it); 137 } 138 } 139 } 140 141 // cartesian product: keys x addressses 142 static int mesh_transport_key_and_virtual_address_iterator_has_more(mesh_transport_key_and_virtual_address_iterator_t * it){ 143 if (mesh_network_address_virtual(it->dst)) { 144 // find next valid entry 145 while (true){ 146 if (mesh_virtual_address_iterator_has_more(&it->address_it)) return 1; 147 if (!mesh_transport_key_aid_iterator_has_more(&it->key_it)) return 0; 148 // get next key 149 it->key = mesh_transport_key_aid_iterator_get_next(&it->key_it); 150 mesh_virtual_address_iterator_init(&it->address_it, it->dst); 151 } 152 } else { 153 return mesh_transport_key_aid_iterator_has_more(&it->key_it); 154 } 155 } 156 157 static void mesh_transport_key_and_virtual_address_iterator_next(mesh_transport_key_and_virtual_address_iterator_t * it){ 158 if (mesh_network_address_virtual(it->dst)) { 159 it->address = mesh_virtual_address_iterator_get_next(&it->address_it); 160 } else { 161 it->key = mesh_transport_key_aid_iterator_get_next(&it->key_it); 162 } 163 } 164 165 // UPPER TRANSPORT 166 167 uint16_t mesh_access_dst(mesh_access_pdu_t * access_pdu){ 168 return big_endian_read_16(access_pdu->network_header, 7); 169 } 170 171 uint16_t mesh_access_ctl(mesh_access_pdu_t * access_pdu){ 172 return access_pdu->network_header[1] >> 7; 173 } 174 175 uint32_t mesh_access_seq(mesh_access_pdu_t * access_pdu){ 176 return big_endian_read_24(access_pdu->network_header, 2); 177 } 178 179 void mesh_access_set_nid_ivi(mesh_access_pdu_t * access_pdu, uint8_t nid_ivi){ 180 access_pdu->network_header[0] = nid_ivi; 181 } 182 void mesh_access_set_ctl_ttl(mesh_access_pdu_t * access_pdu, uint8_t ctl_ttl){ 183 access_pdu->network_header[1] = ctl_ttl; 184 } 185 void mesh_access_set_seq(mesh_access_pdu_t * access_pdu, uint32_t seq){ 186 big_endian_store_24(access_pdu->network_header, 2, seq); 187 } 188 void mesh_access_set_src(mesh_access_pdu_t * access_pdu, uint16_t src){ 189 big_endian_store_16(access_pdu->network_header, 5, src); 190 } 191 void mesh_access_set_dest(mesh_access_pdu_t * access_pdu, uint16_t dest){ 192 big_endian_store_16(access_pdu->network_header, 7, dest); 193 } 194 195 static void mesh_segmented_pdu_flatten(btstack_linked_list_t * segments, uint8_t segment_len, uint8_t * buffer) { 196 // assemble payload 197 btstack_linked_list_iterator_t it; 198 btstack_linked_list_iterator_init(&it, segments); 199 while (btstack_linked_list_iterator_has_next(&it)) { 200 mesh_network_pdu_t *segment = (mesh_network_pdu_t *) btstack_linked_list_iterator_next(&it); 201 btstack_assert(segment->pdu_header.pdu_type == MESH_PDU_TYPE_NETWORK); 202 // get segment n 203 uint8_t *lower_transport_pdu = mesh_network_pdu_data(segment); 204 uint8_t seg_o = (big_endian_read_16(lower_transport_pdu, 2) >> 5) & 0x001f; 205 uint8_t *segment_data = &lower_transport_pdu[4]; 206 (void) memcpy(&buffer[seg_o * segment_len], segment_data, segment_len); 207 } 208 } 209 210 static uint16_t mesh_upper_pdu_flatten(mesh_upper_transport_pdu_t * upper_pdu, uint8_t * buffer, uint16_t buffer_len) { 211 // assemble payload 212 btstack_linked_list_iterator_t it; 213 btstack_linked_list_iterator_init(&it, &upper_pdu->segments); 214 uint16_t offset = 0; 215 while (btstack_linked_list_iterator_has_next(&it)) { 216 mesh_network_pdu_t *segment = (mesh_network_pdu_t *) btstack_linked_list_iterator_next(&it); 217 btstack_assert(segment->pdu_header.pdu_type == MESH_PDU_TYPE_NETWORK); 218 btstack_assert((offset + segment->len) <= buffer_len); 219 (void) memcpy(&buffer[offset], segment->data, segment->len); 220 offset += segment->len; 221 } 222 return offset; 223 } 224 225 static void mesh_segmented_append_payload(const uint8_t * payload, uint16_t payload_len, btstack_linked_list_t * segments){ 226 uint16_t payload_offset = 0; 227 uint16_t bytes_current_segment = 0; 228 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_get_last_item(segments); 229 if (network_pdu){ 230 bytes_current_segment = MESH_NETWORK_PAYLOAD_MAX - network_pdu->len; 231 } 232 while (payload_offset < payload_len){ 233 if (bytes_current_segment == 0){ 234 network_pdu = mesh_network_pdu_get(); 235 btstack_assert(network_pdu != NULL); 236 btstack_linked_list_add_tail(segments, (btstack_linked_item_t *) network_pdu); 237 bytes_current_segment = MESH_NETWORK_PAYLOAD_MAX; 238 } 239 uint16_t bytes_to_copy = btstack_min(bytes_current_segment, payload_len - payload_offset); 240 (void) memcpy(&network_pdu->data[network_pdu->len], &payload[payload_offset], bytes_to_copy); 241 bytes_current_segment -= bytes_to_copy; 242 network_pdu->len += bytes_to_copy; 243 payload_offset += bytes_to_copy; 244 } 245 } 246 247 // stub lower transport 248 249 static void mesh_upper_transport_dump_pdus(const char *name, btstack_linked_list_t *list){ 250 printf("List: %s:\n", name); 251 btstack_linked_list_iterator_t it; 252 btstack_linked_list_iterator_init(&it, list); 253 while (btstack_linked_list_iterator_has_next(&it)){ 254 mesh_pdu_t * pdu = (mesh_pdu_t*) btstack_linked_list_iterator_next(&it); 255 printf("- %p\n", pdu); 256 // printf_hexdump( mesh_pdu_data(pdu), mesh_pdu_len(pdu)); 257 } 258 } 259 260 static void mesh_upper_transport_reset_pdus(btstack_linked_list_t *list){ 261 while (!btstack_linked_list_empty(list)){ 262 mesh_upper_transport_pdu_free((mesh_pdu_t *) btstack_linked_list_pop(list)); 263 } 264 } 265 266 void mesh_upper_transport_dump(void){ 267 mesh_upper_transport_dump_pdus("upper_transport_incoming", &upper_transport_incoming); 268 } 269 270 void mesh_upper_transport_reset(void){ 271 crypto_active = 0; 272 mesh_upper_transport_reset_pdus(&upper_transport_incoming); 273 } 274 275 static mesh_transport_key_t * mesh_upper_transport_get_outgoing_appkey(uint16_t netkey_index, uint16_t appkey_index){ 276 // Device Key is fixed 277 if (appkey_index == MESH_DEVICE_KEY_INDEX) { 278 return mesh_transport_key_get(appkey_index); 279 } 280 281 // Get key refresh state from subnet 282 mesh_subnet_t * subnet = mesh_subnet_get_by_netkey_index(netkey_index); 283 if (subnet == NULL) return NULL; 284 285 // identify old and new app keys for given appkey_index 286 mesh_transport_key_t * old_key = NULL; 287 mesh_transport_key_t * new_key = NULL; 288 mesh_transport_key_iterator_t it; 289 mesh_transport_key_iterator_init(&it, netkey_index); 290 while (mesh_transport_key_iterator_has_more(&it)){ 291 mesh_transport_key_t * transport_key = mesh_transport_key_iterator_get_next(&it); 292 if (transport_key->appkey_index != appkey_index) continue; 293 if (transport_key->old_key == 0) { 294 new_key = transport_key; 295 } else { 296 old_key = transport_key; 297 } 298 } 299 300 // if no key is marked as old, just use the current one 301 if (old_key == NULL) return new_key; 302 303 // use new key if it exists in phase two 304 if ((subnet->key_refresh == MESH_KEY_REFRESH_SECOND_PHASE) && (new_key != NULL)){ 305 return new_key; 306 } else { 307 return old_key; 308 } 309 } 310 311 static uint32_t iv_index_for_ivi_nid(uint8_t ivi_nid){ 312 // get IV Index and IVI 313 uint32_t iv_index = mesh_get_iv_index(); 314 int ivi = ivi_nid >> 7; 315 316 // if least significant bit differs, use previous IV Index 317 if ((iv_index & 1 ) ^ ivi){ 318 iv_index--; 319 } 320 return iv_index; 321 } 322 323 static void transport_segmented_setup_nonce(uint8_t * nonce, const mesh_pdu_t * pdu){ 324 mesh_access_pdu_t * access_pdu; 325 mesh_upper_transport_pdu_t * upper_pdu; 326 switch (pdu->pdu_type){ 327 case MESH_PDU_TYPE_ACCESS: 328 access_pdu = (mesh_access_pdu_t *) pdu; 329 nonce[1] = access_pdu->transmic_len == 8 ? 0x80 : 0x00; 330 (void)memcpy(&nonce[2], &access_pdu->network_header[2], 7); 331 big_endian_store_32(nonce, 9, iv_index_for_ivi_nid(access_pdu->network_header[0])); 332 break; 333 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 334 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 335 upper_pdu = (mesh_upper_transport_pdu_t *) pdu; 336 nonce[1] = upper_pdu->transmic_len == 8 ? 0x80 : 0x00; 337 // 'network header' 338 big_endian_store_24(nonce, 2, upper_pdu->seq); 339 big_endian_store_16(nonce, 5, upper_pdu->src); 340 big_endian_store_16(nonce, 7, upper_pdu->dst); 341 big_endian_store_32(nonce, 9, iv_index_for_ivi_nid(upper_pdu->ivi_nid)); 342 break; 343 default: 344 btstack_assert(0); 345 break; 346 } 347 } 348 349 static void transport_segmented_setup_application_nonce(uint8_t * nonce, const mesh_pdu_t * pdu){ 350 nonce[0] = 0x01; 351 transport_segmented_setup_nonce(nonce, pdu); 352 mesh_print_hex("AppNonce", nonce, 13); 353 } 354 355 static void transport_segmented_setup_device_nonce(uint8_t * nonce, const mesh_pdu_t * pdu){ 356 nonce[0] = 0x02; 357 transport_segmented_setup_nonce(nonce, pdu); 358 mesh_print_hex("DeviceNonce", nonce, 13); 359 } 360 361 static void mesh_upper_transport_process_access_message_done(mesh_access_pdu_t *access_pdu){ 362 crypto_active = 0; 363 btstack_assert(mesh_access_ctl(access_pdu) == 0); 364 incoming_access_pdu_encrypted = NULL; 365 mesh_upper_transport_run(); 366 } 367 368 static void mesh_upper_transport_process_control_message_done(mesh_control_pdu_t * control_pdu){ 369 crypto_active = 0; 370 incoming_control_pdu = NULL; 371 mesh_upper_transport_run(); 372 } 373 374 static void mesh_upper_transport_validate_segmented_message_ccm(void * arg){ 375 UNUSED(arg); 376 377 uint8_t * upper_transport_pdu = incoming_access_pdu_decrypted->data; 378 uint8_t upper_transport_pdu_len = incoming_access_pdu_decrypted->len - incoming_access_pdu_decrypted->transmic_len; 379 380 mesh_print_hex("Decrypted PDU", upper_transport_pdu, upper_transport_pdu_len); 381 382 // store TransMIC 383 uint8_t trans_mic[8]; 384 btstack_crypto_ccm_get_authentication_value(&ccm, trans_mic); 385 mesh_print_hex("TransMIC", trans_mic, incoming_access_pdu_decrypted->transmic_len); 386 387 if (memcmp(trans_mic, &upper_transport_pdu[upper_transport_pdu_len], incoming_access_pdu_decrypted->transmic_len) == 0){ 388 printf("TransMIC matches\n"); 389 390 // remove TransMIC from payload 391 incoming_access_pdu_decrypted->len -= incoming_access_pdu_decrypted->transmic_len; 392 393 // if virtual address, update dst to pseudo_dst 394 if (mesh_network_address_virtual(mesh_access_dst(incoming_access_pdu_decrypted))){ 395 big_endian_store_16(incoming_access_pdu_decrypted->network_header, 7, mesh_transport_key_it.address->pseudo_dst); 396 } 397 398 // pass to upper layer 399 btstack_assert(mesh_access_message_handler != NULL); 400 mesh_pdu_t * pdu = (mesh_pdu_t*) incoming_access_pdu_decrypted; 401 mesh_access_message_handler(MESH_TRANSPORT_PDU_RECEIVED, MESH_TRANSPORT_STATUS_SUCCESS, pdu); 402 403 printf("\n"); 404 405 } else { 406 uint8_t akf = incoming_access_pdu_decrypted->akf_aid_control & 0x40; 407 if (akf){ 408 printf("TransMIC does not match, try next key\n"); 409 mesh_upper_transport_validate_segmented_message(); 410 } else { 411 printf("TransMIC does not match device key, done\n"); 412 // done 413 mesh_upper_transport_process_access_message_done(incoming_access_pdu_decrypted); 414 } 415 } 416 } 417 418 static void mesh_upper_transport_validate_segmented_message_digest(void * arg){ 419 UNUSED(arg); 420 uint8_t upper_transport_pdu_len = incoming_access_pdu_encrypted->len - incoming_access_pdu_encrypted->transmic_len; 421 uint8_t * upper_transport_pdu_data_in = incoming_access_pdu_encrypted->data; 422 uint8_t * upper_transport_pdu_data_out = incoming_access_pdu_decrypted->data; 423 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); 424 } 425 426 static void mesh_upper_transport_validate_segmented_message(void){ 427 uint8_t * upper_transport_pdu_data = incoming_access_pdu_decrypted->data; 428 uint8_t upper_transport_pdu_len = incoming_access_pdu_decrypted->len - incoming_access_pdu_decrypted->transmic_len; 429 430 if (!mesh_transport_key_and_virtual_address_iterator_has_more(&mesh_transport_key_it)){ 431 printf("No valid transport key found\n"); 432 mesh_upper_transport_process_access_message_done(incoming_access_pdu_decrypted); 433 return; 434 } 435 mesh_transport_key_and_virtual_address_iterator_next(&mesh_transport_key_it); 436 const mesh_transport_key_t * message_key = mesh_transport_key_it.key; 437 438 if (message_key->akf){ 439 transport_segmented_setup_application_nonce(application_nonce, (mesh_pdu_t *) incoming_access_pdu_encrypted); 440 } else { 441 transport_segmented_setup_device_nonce(application_nonce, (mesh_pdu_t *) incoming_access_pdu_encrypted); 442 } 443 444 // store application / device key index 445 mesh_print_hex("AppOrDevKey", message_key->key, 16); 446 incoming_access_pdu_decrypted->appkey_index = message_key->appkey_index; 447 448 mesh_print_hex("EncAccessPayload", upper_transport_pdu_data, upper_transport_pdu_len); 449 450 // decrypt ccm 451 crypto_active = 1; 452 uint16_t aad_len = 0; 453 if (mesh_network_address_virtual(mesh_access_dst(incoming_access_pdu_decrypted))){ 454 aad_len = 16; 455 } 456 btstack_crypto_ccm_init(&ccm, message_key->key, application_nonce, upper_transport_pdu_len, aad_len, incoming_access_pdu_decrypted->transmic_len); 457 458 if (aad_len){ 459 btstack_crypto_ccm_digest(&ccm, (uint8_t *) mesh_transport_key_it.address->label_uuid, aad_len, &mesh_upper_transport_validate_segmented_message_digest, NULL); 460 } else { 461 mesh_upper_transport_validate_segmented_message_digest(NULL); 462 } 463 } 464 465 static void mesh_upper_transport_process_segmented_message(void){ 466 // copy original pdu 467 (void)memcpy(incoming_access_pdu_decrypted, incoming_access_pdu_encrypted, 468 sizeof(mesh_access_pdu_t)); 469 470 // 471 uint8_t * upper_transport_pdu = incoming_access_pdu_decrypted->data; 472 uint8_t upper_transport_pdu_len = incoming_access_pdu_decrypted->len - incoming_access_pdu_decrypted->transmic_len; 473 mesh_print_hex("Upper Transport pdu", upper_transport_pdu, upper_transport_pdu_len); 474 475 uint8_t aid = incoming_access_pdu_decrypted->akf_aid_control & 0x3f; 476 uint8_t akf = (incoming_access_pdu_decrypted->akf_aid_control & 0x40) >> 6; 477 478 printf("AKF: %u\n", akf); 479 printf("AID: %02x\n", aid); 480 481 mesh_transport_key_and_virtual_address_iterator_init(&mesh_transport_key_it, mesh_access_dst(incoming_access_pdu_decrypted), 482 incoming_access_pdu_decrypted->netkey_index, akf, aid); 483 mesh_upper_transport_validate_segmented_message(); 484 } 485 486 static void mesh_upper_transport_message_received(mesh_pdu_t * pdu){ 487 btstack_linked_list_add_tail(&upper_transport_incoming, (btstack_linked_item_t*) pdu); 488 mesh_upper_transport_run(); 489 } 490 491 static void mesh_upper_transport_send_access_segmented(mesh_upper_transport_pdu_t * upper_pdu){ 492 493 mesh_segmented_pdu_t * message_pdu = &outgoing_segmented_pdu_singleton; 494 message_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_SEGMENTED; 495 496 // convert mesh_access_pdu_t into mesh_segmented_pdu_t 497 mesh_segmented_append_payload(crypto_buffer, upper_pdu->len, &message_pdu->segments); 498 499 // copy meta 500 message_pdu->len = upper_pdu->len; 501 message_pdu->netkey_index = upper_pdu->netkey_index; 502 message_pdu->transmic_len = upper_pdu->transmic_len; 503 message_pdu->akf_aid_control = upper_pdu->akf_aid_control; 504 message_pdu->flags = upper_pdu->flags; 505 506 // setup message_pdu header 507 // (void)memcpy(message_pdu->network_header, upper_pdu->network_header, 9); 508 // TODO: use fields in mesh_segmented_pdu_t and setup network header in lower transport 509 message_pdu->network_header[0] = upper_pdu->ivi_nid; 510 message_pdu->network_header[1] = upper_pdu->ctl_ttl; 511 big_endian_store_24(message_pdu->network_header, 2, upper_pdu->seq); 512 big_endian_store_16(message_pdu->network_header, 5, upper_pdu->src); 513 big_endian_store_16(message_pdu->network_header, 7, upper_pdu->dst); 514 515 // queue up 516 upper_pdu->lower_pdu = (mesh_pdu_t *) message_pdu; 517 btstack_linked_list_add(&upper_transport_outgoing_active, (btstack_linked_item_t *) upper_pdu); 518 519 mesh_lower_transport_send_pdu((mesh_pdu_t*) message_pdu); 520 } 521 522 static void mesh_upper_transport_send_access_unsegmented(mesh_upper_transport_pdu_t * upper_pdu){ 523 524 // provide segment 525 mesh_network_pdu_t * network_pdu = mesh_network_pdu_get(); 526 btstack_assert(network_pdu); 527 528 // setup network pdu 529 network_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS; 530 network_pdu->data[0] = upper_pdu->ivi_nid; 531 network_pdu->data[1] = upper_pdu->ctl_ttl; 532 big_endian_store_24(network_pdu->data, 2, upper_pdu->seq); 533 big_endian_store_16(network_pdu->data, 5, upper_pdu->src); 534 big_endian_store_16(network_pdu->data, 7, upper_pdu->dst); 535 network_pdu->netkey_index = upper_pdu->netkey_index; 536 537 // setup access message 538 network_pdu->data[9] = upper_pdu->akf_aid_control; 539 btstack_assert(upper_pdu->len < 15); 540 (void)memcpy(&network_pdu->data[10], crypto_buffer, upper_pdu->len); 541 network_pdu->len = 10 + upper_pdu->len; 542 network_pdu->flags = 0; 543 544 // queue up 545 upper_pdu->lower_pdu = (mesh_pdu_t *) network_pdu; 546 btstack_linked_list_add(&upper_transport_outgoing_active, (btstack_linked_item_t *) upper_pdu); 547 548 mesh_lower_transport_send_pdu((mesh_pdu_t*) network_pdu); 549 } 550 551 static void mesh_upper_transport_send_access_ccm(void * arg){ 552 crypto_active = 0; 553 554 mesh_upper_transport_pdu_t * upper_pdu = (mesh_upper_transport_pdu_t *) arg; 555 mesh_print_hex("EncAccessPayload", crypto_buffer, upper_pdu->len); 556 // store TransMIC 557 btstack_crypto_ccm_get_authentication_value(&ccm, &crypto_buffer[upper_pdu->len]); 558 mesh_print_hex("TransMIC", &crypto_buffer[upper_pdu->len], upper_pdu->transmic_len); 559 upper_pdu->len += upper_pdu->transmic_len; 560 mesh_print_hex("UpperTransportPDU", crypto_buffer, upper_pdu->len); 561 switch (upper_pdu->pdu_header.pdu_type){ 562 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 563 mesh_upper_transport_send_access_unsegmented(upper_pdu); 564 break; 565 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 566 mesh_upper_transport_send_access_segmented(upper_pdu); 567 break; 568 default: 569 btstack_assert(false); 570 } 571 } 572 573 static void mesh_upper_transport_send_access_digest(void *arg){ 574 mesh_upper_transport_pdu_t * upper_pdu = (mesh_upper_transport_pdu_t *) arg; 575 uint16_t access_pdu_len = upper_pdu->len; 576 btstack_crypto_ccm_encrypt_block(&ccm, access_pdu_len, crypto_buffer, crypto_buffer, 577 &mesh_upper_transport_send_access_ccm, upper_pdu); 578 } 579 580 static void mesh_upper_transport_send_access(mesh_upper_transport_pdu_t * upper_pdu){ 581 582 // if dst is virtual address, lookup label uuid and hash 583 uint16_t aad_len = 0; 584 mesh_virtual_address_t * virtual_address = NULL; 585 if (mesh_network_address_virtual(upper_pdu->dst)){ 586 virtual_address = mesh_virtual_address_for_pseudo_dst(upper_pdu->dst); 587 if (!virtual_address){ 588 printf("No virtual address register for pseudo dst %4x\n", upper_pdu->dst); 589 mesh_access_message_handler(MESH_TRANSPORT_PDU_SENT, MESH_TRANSPORT_STATUS_SEND_FAILED, (mesh_pdu_t *) upper_pdu); 590 return; 591 } 592 // printf("Using hash %4x with LabelUUID: ", virtual_address->hash); 593 // printf_hexdump(virtual_address->label_uuid, 16); 594 aad_len = 16; 595 upper_pdu->dst = virtual_address->hash; 596 } 597 598 // get app or device key 599 uint16_t appkey_index = upper_pdu->appkey_index; 600 const mesh_transport_key_t * appkey = mesh_upper_transport_get_outgoing_appkey(upper_pdu->netkey_index, appkey_index); 601 if (appkey == NULL){ 602 printf("AppKey %04x not found, drop message\n", appkey_index); 603 mesh_access_message_handler(MESH_TRANSPORT_PDU_SENT, MESH_TRANSPORT_STATUS_SEND_FAILED, (mesh_pdu_t *) upper_pdu); 604 return; 605 } 606 607 // reserve slot 608 mesh_lower_transport_reserve_slot(); 609 610 // reserve one sequence number, which is also used to encrypt access payload 611 uint32_t seq = mesh_sequence_number_next(); 612 upper_pdu->flags |= MESH_TRANSPORT_FLAG_SEQ_RESERVED; 613 upper_pdu->seq = seq; 614 615 // also reserves crypto_buffer 616 crypto_active = 1; 617 618 // flatten segmented pdu into crypto buffer 619 uint16_t payload_len = mesh_upper_pdu_flatten(upper_pdu, crypto_buffer, sizeof(crypto_buffer)); 620 btstack_assert(payload_len == upper_pdu->len); 621 622 // Dump PDU 623 printf("[+] Upper transport, send upper (un)segmented Access PDU - dest %04x, seq %06x\n", upper_pdu->dst, upper_pdu->seq); 624 mesh_print_hex("Access Payload", crypto_buffer, upper_pdu->len); 625 626 // setup nonce - uses dst, so after pseudo address translation 627 if (appkey_index == MESH_DEVICE_KEY_INDEX){ 628 transport_segmented_setup_device_nonce(application_nonce, (mesh_pdu_t *) upper_pdu); 629 } else { 630 transport_segmented_setup_application_nonce(application_nonce, (mesh_pdu_t *) upper_pdu); 631 } 632 633 // Dump key 634 mesh_print_hex("AppOrDevKey", appkey->key, 16); 635 636 // encrypt ccm 637 uint8_t transmic_len = upper_pdu->transmic_len; 638 uint16_t access_pdu_len = upper_pdu->len; 639 btstack_crypto_ccm_init(&ccm, appkey->key, application_nonce, access_pdu_len, aad_len, transmic_len); 640 if (virtual_address){ 641 mesh_print_hex("LabelUUID", virtual_address->label_uuid, 16); 642 btstack_crypto_ccm_digest(&ccm, virtual_address->label_uuid, 16, 643 &mesh_upper_transport_send_access_digest, upper_pdu); 644 } else { 645 mesh_upper_transport_send_access_digest(upper_pdu); 646 } 647 } 648 649 static void mesh_upper_transport_send_unsegmented_control_pdu(mesh_network_pdu_t * network_pdu){ 650 // reserve slot 651 mesh_lower_transport_reserve_slot(); 652 // reserve sequence number 653 uint32_t seq = mesh_sequence_number_next(); 654 mesh_network_pdu_set_seq(network_pdu, seq); 655 // Dump PDU 656 uint8_t opcode = network_pdu->data[9]; 657 printf("[+] Upper transport, send unsegmented Control PDU %p - seq %06x opcode %02x\n", network_pdu, seq, opcode); 658 mesh_print_hex("Access Payload", &network_pdu->data[10], network_pdu->len - 10); 659 660 // send 661 mesh_lower_transport_send_pdu((mesh_pdu_t *) network_pdu); 662 } 663 664 static void mesh_upper_transport_send_segmented_control_pdu(mesh_upper_transport_pdu_t * upper_pdu){ 665 // reserve slot 666 mesh_lower_transport_reserve_slot(); 667 // reserve sequence number 668 uint32_t seq = mesh_sequence_number_next(); 669 upper_pdu->flags |= MESH_TRANSPORT_FLAG_SEQ_RESERVED; 670 upper_pdu->seq = seq; 671 // Dump PDU 672 // uint8_t opcode = upper_pdu->data[0]; 673 // printf("[+] Upper transport, send segmented Control PDU %p - seq %06x opcode %02x\n", upper_pdu, seq, opcode); 674 // mesh_print_hex("Access Payload", &upper_pdu->data[1], upper_pdu->len - 1); 675 // send 676 mesh_segmented_pdu_t *message_pdu = &outgoing_segmented_pdu_singleton; 677 message_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_SEGMENTED; 678 679 // lend segments to lower transport pdu 680 message_pdu->segments = upper_pdu->segments; 681 upper_pdu->segments = NULL; 682 683 // copy meta 684 message_pdu->len = upper_pdu->len; 685 message_pdu->netkey_index = upper_pdu->netkey_index; 686 message_pdu->transmic_len = 0; // no TransMIC for control 687 message_pdu->akf_aid_control = upper_pdu->akf_aid_control; 688 message_pdu->flags = upper_pdu->flags; 689 690 // setup message_pdu header 691 // TODO: use fields in mesh_segmented_pdu_t and setup network header in lower transport 692 message_pdu->network_header[0] = upper_pdu->ivi_nid; 693 message_pdu->network_header[1] = upper_pdu->ctl_ttl; 694 big_endian_store_24(message_pdu->network_header, 2, upper_pdu->seq); 695 big_endian_store_16(message_pdu->network_header, 5, upper_pdu->src); 696 big_endian_store_16(message_pdu->network_header, 7, upper_pdu->dst); 697 698 // queue up 699 upper_pdu->lower_pdu = (mesh_pdu_t *) message_pdu; 700 btstack_linked_list_add(&upper_transport_outgoing_active, (btstack_linked_item_t *) upper_pdu); 701 702 mesh_lower_transport_send_pdu((mesh_pdu_t *) message_pdu); 703 } 704 705 static void mesh_upper_transport_run(void){ 706 707 while(!btstack_linked_list_empty(&upper_transport_incoming)){ 708 709 if (crypto_active) return; 710 711 // get next message 712 mesh_pdu_t * pdu = (mesh_pdu_t *) btstack_linked_list_pop(&upper_transport_incoming); 713 mesh_network_pdu_t * network_pdu; 714 mesh_segmented_pdu_t * message_pdu; 715 switch (pdu->pdu_type){ 716 case MESH_PDU_TYPE_UNSEGMENTED: 717 network_pdu = (mesh_network_pdu_t *) pdu; 718 // control? 719 if (mesh_network_control(network_pdu)) { 720 721 incoming_control_pdu = &incoming_control_pdu_singleton; 722 incoming_control_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_CONTROL; 723 incoming_control_pdu->len = network_pdu->len; 724 incoming_control_pdu->netkey_index = network_pdu->netkey_index; 725 726 uint8_t * lower_transport_pdu = mesh_network_pdu_data(network_pdu); 727 728 incoming_control_pdu->akf_aid_control = lower_transport_pdu[0]; 729 incoming_control_pdu->len = network_pdu->len - 10; // 9 header + 1 opcode 730 (void)memcpy(incoming_control_pdu->data, &lower_transport_pdu[1], incoming_control_pdu->len); 731 732 // copy meta data into encrypted pdu buffer 733 (void)memcpy(incoming_control_pdu->network_header, network_pdu->data, 9); 734 735 mesh_print_hex("Assembled payload", incoming_control_pdu->data, incoming_control_pdu->len); 736 737 // free mesh message 738 mesh_lower_transport_message_processed_by_higher_layer(pdu); 739 740 btstack_assert(mesh_control_message_handler != NULL); 741 mesh_pdu_t * pdu = (mesh_pdu_t*) incoming_control_pdu; 742 mesh_control_message_handler(MESH_TRANSPORT_PDU_RECEIVED, MESH_TRANSPORT_STATUS_SUCCESS, pdu); 743 744 } else { 745 746 incoming_access_pdu_encrypted = &incoming_access_pdu_encrypted_singleton; 747 incoming_access_pdu_encrypted->pdu_header.pdu_type = MESH_PDU_TYPE_ACCESS; 748 incoming_access_pdu_decrypted = &incoming_access_pdu_decrypted_singleton; 749 750 incoming_access_pdu_encrypted->netkey_index = network_pdu->netkey_index; 751 incoming_access_pdu_encrypted->transmic_len = 4; 752 753 uint8_t * lower_transport_pdu = mesh_network_pdu_data(network_pdu); 754 755 incoming_access_pdu_encrypted->akf_aid_control = lower_transport_pdu[0]; 756 incoming_access_pdu_encrypted->len = network_pdu->len - 10; // 9 header + 1 AID 757 (void)memcpy(incoming_access_pdu_encrypted->data, &lower_transport_pdu[1], incoming_access_pdu_encrypted->len); 758 759 // copy meta data into encrypted pdu buffer 760 (void)memcpy(incoming_access_pdu_encrypted->network_header, network_pdu->data, 9); 761 762 mesh_print_hex("Assembled payload", incoming_access_pdu_encrypted->data, incoming_access_pdu_encrypted->len); 763 764 // free mesh message 765 mesh_lower_transport_message_processed_by_higher_layer(pdu); 766 767 // get encoded transport pdu and start processing 768 mesh_upper_transport_process_segmented_message(); 769 } 770 break; 771 case MESH_PDU_TYPE_SEGMENTED: 772 message_pdu = (mesh_segmented_pdu_t *) pdu; 773 uint8_t ctl = mesh_message_ctl(message_pdu); 774 if (ctl){ 775 incoming_control_pdu= &incoming_control_pdu_singleton; 776 incoming_control_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_CONTROL; 777 778 // flatten 779 mesh_segmented_pdu_flatten(&message_pdu->segments, 8, incoming_control_pdu->data); 780 781 // copy meta data into encrypted pdu buffer 782 incoming_control_pdu->len = message_pdu->len; 783 incoming_control_pdu->netkey_index = message_pdu->netkey_index; 784 incoming_control_pdu->akf_aid_control = message_pdu->akf_aid_control; 785 incoming_control_pdu->flags = 0; 786 (void)memcpy(incoming_control_pdu->network_header, message_pdu->network_header, 9); 787 788 mesh_print_hex("Assembled payload", incoming_control_pdu->data, incoming_control_pdu->len); 789 790 // free mesh message 791 mesh_lower_transport_message_processed_by_higher_layer((mesh_pdu_t *)message_pdu); 792 793 btstack_assert(mesh_control_message_handler != NULL); 794 mesh_pdu_t * pdu = (mesh_pdu_t*) incoming_control_pdu; 795 mesh_access_message_handler(MESH_TRANSPORT_PDU_RECEIVED, MESH_TRANSPORT_STATUS_SUCCESS, pdu); 796 797 } else { 798 799 incoming_access_pdu_encrypted = &incoming_access_pdu_encrypted_singleton; 800 incoming_access_pdu_encrypted->pdu_header.pdu_type = MESH_PDU_TYPE_ACCESS; 801 incoming_access_pdu_decrypted = &incoming_access_pdu_decrypted_singleton; 802 803 // flatten 804 mesh_segmented_pdu_flatten(&message_pdu->segments, 12, incoming_access_pdu_encrypted->data); 805 806 // copy meta data into encrypted pdu buffer 807 incoming_access_pdu_encrypted->len = message_pdu->len; 808 incoming_access_pdu_encrypted->netkey_index = message_pdu->netkey_index; 809 incoming_access_pdu_encrypted->transmic_len = message_pdu->transmic_len; 810 incoming_access_pdu_encrypted->akf_aid_control = message_pdu->akf_aid_control; 811 (void)memcpy(incoming_access_pdu_encrypted->network_header, message_pdu->network_header, 9); 812 813 mesh_print_hex("Assembled payload", incoming_access_pdu_encrypted->data, incoming_access_pdu_encrypted->len); 814 815 // free mesh message 816 mesh_lower_transport_message_processed_by_higher_layer((mesh_pdu_t *)message_pdu); 817 818 // get encoded transport pdu and start processing 819 mesh_upper_transport_process_segmented_message(); 820 } 821 break; 822 default: 823 btstack_assert(0); 824 break; 825 } 826 } 827 828 while (!btstack_linked_list_empty(&upper_transport_outgoing)){ 829 830 if (crypto_active) break; 831 832 mesh_pdu_t * pdu = (mesh_pdu_t *) btstack_linked_list_get_first_item(&upper_transport_outgoing); 833 if (mesh_lower_transport_can_send_to_dest(mesh_pdu_dst(pdu)) == 0) break; 834 835 (void) btstack_linked_list_pop(&upper_transport_outgoing); 836 837 838 switch (pdu->pdu_type){ 839 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_CONTROL: 840 btstack_assert(mesh_pdu_ctl(pdu) != 0); 841 mesh_upper_transport_send_unsegmented_control_pdu((mesh_network_pdu_t *) pdu); 842 break; 843 case MESH_PDU_TYPE_UPPER_SEGMENTED_CONTROL: 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 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 848 mesh_upper_transport_send_access((mesh_upper_transport_pdu_t *) pdu); 849 break; 850 default: 851 btstack_assert(false); 852 break; 853 } 854 } 855 } 856 857 static mesh_upper_transport_pdu_t * mesh_upper_transport_find_pdu_for_lower(mesh_pdu_t * pdu_to_find){ 858 btstack_linked_list_iterator_t it; 859 btstack_linked_list_iterator_init(&it, &upper_transport_outgoing_active); 860 mesh_upper_transport_pdu_t * upper_pdu; 861 while (btstack_linked_list_iterator_has_next(&it)){ 862 mesh_pdu_t * mesh_pdu = (mesh_pdu_t *) btstack_linked_list_iterator_next(&it); 863 switch (mesh_pdu->pdu_type){ 864 case MESH_PDU_TYPE_UPPER_SEGMENTED_CONTROL: 865 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 866 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 867 upper_pdu = (mesh_upper_transport_pdu_t *) mesh_pdu; 868 if (upper_pdu->lower_pdu == pdu_to_find){ 869 btstack_linked_list_iterator_remove(&it); 870 return upper_pdu; 871 } 872 break; 873 default: 874 break; 875 } 876 } 877 return NULL; 878 } 879 880 static void mesh_upper_transport_pdu_handler(mesh_transport_callback_type_t callback_type, mesh_transport_status_t status, mesh_pdu_t * pdu){ 881 mesh_upper_transport_pdu_t * upper_pdu; 882 mesh_network_pdu_t * network_pdu; 883 mesh_segmented_pdu_t * segmented_pdu; 884 switch (callback_type){ 885 case MESH_TRANSPORT_PDU_RECEIVED: 886 mesh_upper_transport_message_received(pdu); 887 break; 888 case MESH_TRANSPORT_PDU_SENT: 889 switch (pdu->pdu_type){ 890 case MESH_PDU_TYPE_SEGMENTED: 891 // try to find in outgoing active 892 upper_pdu = mesh_upper_transport_find_pdu_for_lower(pdu); 893 btstack_assert(upper_pdu != NULL); 894 segmented_pdu = (mesh_segmented_pdu_t *) pdu; 895 // free chunks 896 while (!btstack_linked_list_empty(&segmented_pdu->segments)){ 897 mesh_network_pdu_t * network_pdu = (mesh_network_pdu_t *) btstack_linked_list_pop(&segmented_pdu->segments); 898 mesh_network_pdu_free(network_pdu); 899 } 900 // TODO: free segmented_pdu 901 switch (upper_pdu->pdu_header.pdu_type){ 902 case MESH_PDU_TYPE_UPPER_SEGMENTED_CONTROL: 903 mesh_control_message_handler(callback_type, status, (mesh_pdu_t *) upper_pdu); 904 break; 905 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 906 mesh_access_message_handler(callback_type, status, (mesh_pdu_t *) upper_pdu); 907 break; 908 default: 909 btstack_assert(false); 910 break; 911 } 912 break; 913 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 914 // try to find in outgoing active 915 upper_pdu = mesh_upper_transport_find_pdu_for_lower(pdu); 916 btstack_assert(upper_pdu != NULL); 917 network_pdu = (mesh_network_pdu_t *) pdu; 918 mesh_network_pdu_free(network_pdu); 919 mesh_access_message_handler(callback_type, status, (mesh_pdu_t*) upper_pdu); 920 break; 921 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_CONTROL: 922 mesh_access_message_handler(callback_type, status, pdu); 923 break; 924 default: 925 btstack_assert(false); 926 break; 927 } 928 mesh_upper_transport_run(); 929 break; 930 default: 931 break; 932 } 933 } 934 935 void mesh_upper_transport_pdu_free(mesh_pdu_t * pdu){ 936 mesh_network_pdu_t * network_pdu; 937 mesh_segmented_pdu_t * message_pdu; 938 switch (pdu->pdu_type) { 939 case MESH_PDU_TYPE_NETWORK: 940 network_pdu = (mesh_network_pdu_t *) pdu; 941 mesh_network_pdu_free(network_pdu); 942 break; 943 case MESH_PDU_TYPE_SEGMENTED: 944 message_pdu = (mesh_segmented_pdu_t *) pdu; 945 mesh_message_pdu_free(message_pdu); 946 default: 947 btstack_assert(false); 948 break; 949 } 950 } 951 952 void mesh_upper_transport_message_processed_by_higher_layer(mesh_pdu_t * pdu){ 953 crypto_active = 0; 954 switch (pdu->pdu_type){ 955 case MESH_PDU_TYPE_ACCESS: 956 mesh_upper_transport_process_access_message_done((mesh_access_pdu_t *) pdu); 957 case MESH_PDU_TYPE_CONTROL: 958 mesh_upper_transport_process_control_message_done((mesh_control_pdu_t *) pdu); 959 break; 960 default: 961 btstack_assert(0); 962 break; 963 } 964 } 965 966 void mesh_upper_transport_send_access_pdu(mesh_pdu_t *pdu){ 967 switch (pdu->pdu_type){ 968 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 969 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 970 break; 971 default: 972 btstack_assert(false); 973 break; 974 } 975 976 btstack_linked_list_add_tail(&upper_transport_outgoing, (btstack_linked_item_t*) pdu); 977 mesh_upper_transport_run(); 978 } 979 980 void mesh_upper_transport_send_control_pdu(mesh_pdu_t * pdu){ 981 switch (pdu->pdu_type){ 982 case MESH_PDU_TYPE_UPPER_SEGMENTED_CONTROL: 983 break; 984 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_CONTROL: 985 btstack_assert( ((mesh_network_pdu_t *) pdu)->len >= 9); 986 break; 987 default: 988 btstack_assert(false); 989 break; 990 } 991 992 btstack_linked_list_add_tail(&upper_transport_outgoing, (btstack_linked_item_t*) pdu); 993 mesh_upper_transport_run(); 994 } 995 996 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, 997 const uint8_t * control_pdu_data, uint16_t control_pdu_len){ 998 999 if (control_pdu_len > 11) return 1; 1000 1001 const mesh_network_key_t * network_key = mesh_network_key_list_get(netkey_index); 1002 if (!network_key) return 1; 1003 1004 uint8_t transport_pdu_data[12]; 1005 transport_pdu_data[0] = opcode; 1006 (void)memcpy(&transport_pdu_data[1], control_pdu_data, control_pdu_len); 1007 uint16_t transport_pdu_len = control_pdu_len + 1; 1008 1009 // setup network_pdu 1010 mesh_network_setup_pdu(network_pdu, netkey_index, network_key->nid, 1, ttl, 0, src, dest, transport_pdu_data, transport_pdu_len); 1011 1012 return 0; 1013 } 1014 1015 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, 1016 const uint8_t * control_pdu_data, uint16_t control_pdu_len){ 1017 1018 if (control_pdu_len > 256) return 1; 1019 1020 const mesh_network_key_t * network_key = mesh_network_key_list_get(netkey_index); 1021 if (!network_key) return 1; 1022 1023 upper_pdu->ivi_nid = network_key->nid | ((mesh_get_iv_index_for_tx() & 1) << 7); 1024 upper_pdu->ctl_ttl = ttl; 1025 upper_pdu->src = src; 1026 upper_pdu->dst = dest; 1027 upper_pdu->transmic_len = 0; // no TransMIC for control 1028 upper_pdu->netkey_index = netkey_index; 1029 upper_pdu->akf_aid_control = opcode; 1030 1031 mesh_segmented_append_payload(control_pdu_data, control_pdu_len, &upper_pdu->segments); 1032 upper_pdu->len = control_pdu_len; 1033 return 0; 1034 } 1035 1036 uint8_t mesh_upper_transport_setup_control_pdu(mesh_pdu_t * pdu, uint16_t netkey_index, 1037 uint8_t ttl, uint16_t src, uint16_t dest, uint8_t opcode, const uint8_t * control_pdu_data, uint16_t control_pdu_len){ 1038 switch (pdu->pdu_type){ 1039 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_CONTROL: 1040 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); 1041 case MESH_PDU_TYPE_UPPER_SEGMENTED_CONTROL: 1042 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); 1043 default: 1044 btstack_assert(0); 1045 return 1; 1046 } 1047 } 1048 1049 static uint8_t mesh_upper_transport_setup_segmented_access_pdu_header(mesh_access_pdu_t * access_pdu, uint16_t netkey_index, 1050 uint16_t appkey_index, uint8_t ttl, uint16_t src, uint16_t dest, uint8_t szmic){ 1051 1052 // get app or device key 1053 const mesh_transport_key_t *appkey; 1054 appkey = mesh_transport_key_get(appkey_index); 1055 if (appkey == NULL) { 1056 printf("[!] Upper transport, setup segmented Access PDU - appkey_index %x unknown\n", appkey_index); 1057 return 1; 1058 } 1059 uint8_t akf_aid = (appkey->akf << 6) | appkey->aid; 1060 1061 // lookup network by netkey_index 1062 const mesh_network_key_t *network_key = mesh_network_key_list_get(netkey_index); 1063 if (!network_key) return 1; 1064 if (network_key == NULL) { 1065 printf("[!] Upper transport, setup segmented Access PDU - netkey_index %x unknown\n", appkey_index); 1066 return 1; 1067 } 1068 1069 const uint8_t trans_mic_len = szmic ? 8 : 4; 1070 1071 // store in transport pdu 1072 access_pdu->transmic_len = trans_mic_len; 1073 access_pdu->netkey_index = netkey_index; 1074 access_pdu->appkey_index = appkey_index; 1075 access_pdu->akf_aid_control = akf_aid; 1076 mesh_access_set_nid_ivi(access_pdu, network_key->nid | ((mesh_get_iv_index_for_tx() & 1) << 7)); 1077 mesh_access_set_src(access_pdu, src); 1078 mesh_access_set_dest(access_pdu, dest); 1079 mesh_access_set_ctl_ttl(access_pdu, ttl); 1080 return 0; 1081 } 1082 1083 static uint8_t mesh_upper_transport_setup_upper_access_pdu_header(mesh_upper_transport_pdu_t * upper_pdu, uint16_t netkey_index, 1084 uint16_t appkey_index, uint8_t ttl, uint16_t src, uint16_t dest, uint8_t szmic){ 1085 1086 // get app or device key 1087 const mesh_transport_key_t *appkey; 1088 appkey = mesh_transport_key_get(appkey_index); 1089 if (appkey == NULL) { 1090 printf("[!] Upper transport, setup segmented Access PDU - appkey_index %x unknown\n", appkey_index); 1091 return 1; 1092 } 1093 uint8_t akf_aid = (appkey->akf << 6) | appkey->aid; 1094 1095 // lookup network by netkey_index 1096 const mesh_network_key_t *network_key = mesh_network_key_list_get(netkey_index); 1097 if (!network_key) return 1; 1098 if (network_key == NULL) { 1099 printf("[!] Upper transport, setup segmented Access PDU - netkey_index %x unknown\n", appkey_index); 1100 return 1; 1101 } 1102 1103 const uint8_t trans_mic_len = szmic ? 8 : 4; 1104 1105 // store in transport pdu 1106 upper_pdu->ivi_nid = network_key->nid | ((mesh_get_iv_index_for_tx() & 1) << 7); 1107 upper_pdu->ctl_ttl = ttl; 1108 upper_pdu->src = src; 1109 upper_pdu->dst = dest; 1110 upper_pdu->transmic_len = trans_mic_len; 1111 upper_pdu->netkey_index = netkey_index; 1112 upper_pdu->appkey_index = appkey_index; 1113 upper_pdu->akf_aid_control = akf_aid; 1114 return 0; 1115 } 1116 1117 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, 1118 uint8_t szmic, const uint8_t * access_pdu_data, uint8_t access_pdu_len){ 1119 int status = mesh_upper_transport_setup_upper_access_pdu_header(upper_pdu, netkey_index, appkey_index, ttl, src, 1120 dest, szmic); 1121 if (status) return status; 1122 1123 // store in transport pdu 1124 mesh_segmented_append_payload(access_pdu_data, access_pdu_len, &upper_pdu->segments); 1125 upper_pdu->len = access_pdu_len; 1126 return 0; 1127 } 1128 1129 1130 uint8_t mesh_upper_transport_setup_access_pdu_header(mesh_pdu_t * pdu, uint16_t netkey_index, uint16_t appkey_index, 1131 uint8_t ttl, uint16_t src, uint16_t dest, uint8_t szmic){ 1132 switch (pdu->pdu_type){ 1133 case MESH_PDU_TYPE_ACCESS: 1134 return mesh_upper_transport_setup_segmented_access_pdu_header((mesh_access_pdu_t *) pdu, netkey_index, appkey_index, ttl, src, dest, szmic); 1135 default: 1136 btstack_assert(false); 1137 return 1; 1138 } 1139 } 1140 1141 uint8_t mesh_upper_transport_setup_access_pdu(mesh_pdu_t * pdu, uint16_t netkey_index, uint16_t appkey_index, 1142 uint8_t ttl, uint16_t src, uint16_t dest, uint8_t szmic, 1143 const uint8_t * access_pdu_data, uint8_t access_pdu_len){ 1144 switch (pdu->pdu_type){ 1145 case MESH_PDU_TYPE_UPPER_SEGMENTED_ACCESS: 1146 case MESH_PDU_TYPE_UPPER_UNSEGMENTED_ACCESS: 1147 return mesh_upper_transport_setup_upper_access_pdu((mesh_upper_transport_pdu_t *) pdu, netkey_index, 1148 appkey_index, ttl, src, dest, szmic, access_pdu_data, 1149 access_pdu_len); 1150 default: 1151 btstack_assert(false); 1152 return 1; 1153 } 1154 } 1155 1156 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)) { 1157 mesh_access_message_handler = callback; 1158 } 1159 1160 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)){ 1161 mesh_control_message_handler = callback; 1162 } 1163 1164 void mesh_upper_transport_init(){ 1165 mesh_lower_transport_set_higher_layer_handler(&mesh_upper_transport_pdu_handler); 1166 } 1167