xref: /btstack/src/mesh/mesh_configuration_server.c (revision 293fd5fb21e86fbb29e9789cc0a2c06dafbbf1b3)
1 /*
2  * Copyright (C) 2019 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_configuration_server.c"
39 
40 #include <string.h>
41 #include <stdio.h>
42 
43 #include "mesh/mesh_configuration_server.h"
44 
45 #include "bluetooth_company_id.h"
46 #include "btstack_debug.h"
47 #include "btstack_memory.h"
48 #include "btstack_tlv.h"
49 #include "btstack_util.h"
50 
51 #include "mesh/beacon.h"
52 #include "mesh/gatt_bearer.h"
53 #include "mesh/mesh.h"
54 #include "mesh/mesh_access.h"
55 #include "mesh/mesh_crypto.h"
56 #include "mesh/mesh_foundation.h"
57 #include "mesh/mesh_iv_index_seq_number.h"
58 #include "mesh/mesh_keys.h"
59 #include "mesh/mesh_network.h"
60 #include "mesh/mesh_node.h"
61 #include "mesh/mesh_proxy.h"
62 #include "mesh/mesh_upper_transport.h"
63 #include "mesh/mesh_virtual_addresses.h"
64 
65 #define MESH_HEARTBEAT_FEATURES_SUPPORTED_MASK 0x000f
66 
67 // current access pdu
68 static mesh_pdu_t * access_pdu_in_process;
69 
70 // data from current pdu
71 static uint16_t                     configuration_server_element_address;
72 static uint32_t                     configuration_server_model_identifier;
73 static mesh_model_t               * configuration_server_target_model;
74 static mesh_publication_model_t     configuration_server_publication_model;
75 
76 // cmac for virtual address hash and netkey derive
77 static btstack_crypto_aes128_cmac_t configuration_server_cmac_request;
78 
79 // used to setup virtual addresses
80 static uint8_t                      configuration_server_label_uuid[16];
81 static uint16_t                     configuration_server_hash;
82 
83 // heartbeat publication and subscription state for all Configuration Server models - there is only one
84 // static mesh_heartbeat_subscription_t mesh_heartbeat_subscription;
85 
86 // for PTS testing
87 static int config_netkey_list_max = 0;
88 
89 
90 // Heartbeat (helper)
91 static uint16_t heartbeat_pwr2(uint8_t value){
92     if (value == 0 )                    return 0x0000;
93     if (value == 0xff || value == 0x11) return 0xffff;
94     return 1 << (value-1);
95 }
96 
97 static uint8_t heartbeat_count_log(uint16_t value){
98     if (value == 0)      return 0x00;
99     if (value == 0xffff) return 0xff;
100     // count leading zeros, supported by clang and gcc
101     // note: CountLog(8) == CountLog(7) = 3
102     return 33 - __builtin_clz(value - 1);
103 }
104 
105 static uint8_t heartbeat_period_log(uint16_t value){
106     if (value == 0)      return 0x00;
107     // count leading zeros, supported by clang and gcc
108     // note: PeriodLog(8) == PeriodLog(7) = 3
109     return 33 - __builtin_clz(value - 1);
110 }
111 
112 // TLV
113 
114 static int mesh_model_is_configuration_server(uint32_t model_identifier){
115     return mesh_model_is_bluetooth_sig(model_identifier) && (mesh_model_get_model_id(model_identifier) == MESH_SIG_MODEL_ID_CONFIGURATION_SERVER);
116 }
117 
118 // Configuration Model Subscriptions (helper)
119 
120 // Model to Appkey List
121 
122 static uint8_t mesh_model_add_subscription(mesh_model_t * mesh_model, uint16_t address){
123     uint16_t i;
124     for (i=0;i<MAX_NR_MESH_SUBSCRIPTION_PER_MODEL;i++){
125         if (mesh_model->subscriptions[i] == address) return MESH_FOUNDATION_STATUS_SUCCESS;
126     }
127     for (i=0;i<MAX_NR_MESH_SUBSCRIPTION_PER_MODEL;i++){
128         if (mesh_model->subscriptions[i] == MESH_ADDRESS_UNSASSIGNED) {
129             mesh_model->subscriptions[i] = address;
130             return MESH_FOUNDATION_STATUS_SUCCESS;
131         }
132     }
133     return MESH_FOUNDATION_STATUS_INSUFFICIENT_RESOURCES;
134 }
135 
136 static void mesh_model_delete_subscription(mesh_model_t * mesh_model, uint16_t address){
137     uint16_t i;
138     for (i=0;i<MAX_NR_MESH_SUBSCRIPTION_PER_MODEL;i++){
139         if (mesh_model->subscriptions[i] == address) {
140             mesh_model->subscriptions[i] = MESH_ADDRESS_UNSASSIGNED;
141         }
142     }
143 }
144 
145 static void mesh_model_delete_all_subscriptions(mesh_model_t * mesh_model){
146     uint16_t i;
147     for (i=0;i<MAX_NR_MESH_SUBSCRIPTION_PER_MODEL;i++){
148         mesh_model->subscriptions[i] = MESH_ADDRESS_UNSASSIGNED;
149     }
150 }
151 
152 static void mesh_subcription_decrease_virtual_address_ref_count(mesh_model_t *mesh_model){
153     // decrease ref counts for current virtual subscriptions
154     uint16_t i;
155     for (i = 0; i<MAX_NR_MESH_SUBSCRIPTION_PER_MODEL ; i++){
156         uint16_t src = mesh_model->subscriptions[i];
157         if (mesh_network_address_virtual(src)){
158             mesh_virtual_address_t * virtual_address = mesh_virtual_address_for_pseudo_dst(src);
159             mesh_virtual_address_decrease_refcount(virtual_address);
160         }
161     }
162 }
163 static void mesh_configuration_server_stop_publishing_using_appkey(mesh_model_t * mesh_model, uint16_t appkey_index){
164     // stop publishing if this AppKey was used
165     if (mesh_model->publication_model != NULL){
166         mesh_publication_model_t * publication_model = mesh_model->publication_model;
167         if (publication_model->appkey_index == appkey_index){
168             publication_model->address = MESH_ADDRESS_UNSASSIGNED;
169             publication_model->appkey_index = 0;
170             publication_model->period = 0;
171             publication_model->ttl = 0;
172             publication_model->retransmit = 0;
173 
174             mesh_model_store_publication(mesh_model);
175         }
176     }
177 }
178 
179 // AppKeys Helper
180 static void mesh_configuration_server_delete_appkey(mesh_transport_key_t * transport_key){
181     uint16_t appkey_index = transport_key->appkey_index;
182 
183     // iterate over elements and models
184     mesh_element_iterator_t element_it;
185     mesh_element_iterator_init(&element_it);
186     while (mesh_element_iterator_has_next(&element_it)){
187         mesh_element_t * element = mesh_element_iterator_next(&element_it);
188         mesh_model_iterator_t model_it;
189         mesh_model_iterator_init(&model_it, element);
190         while (mesh_model_iterator_has_next(&model_it)){
191             mesh_model_t * mesh_model = mesh_model_iterator_next(&model_it);
192 
193             // remove from Model to AppKey List
194             mesh_model_unbind_appkey(mesh_model, appkey_index);
195 
196             // stop publishing if this appkey is used
197             mesh_configuration_server_stop_publishing_using_appkey(mesh_model, appkey_index);
198         }
199     }
200 
201     mesh_access_appkey_finalize(transport_key);
202 }
203 
204 // Foundatiopn Message
205 
206 const mesh_access_message_t mesh_foundation_config_beacon_status = {
207         MESH_FOUNDATION_OPERATION_BEACON_STATUS, "1"
208 };
209 const mesh_access_message_t mesh_foundation_config_default_ttl_status = {
210         MESH_FOUNDATION_OPERATION_DEFAULT_TTL_STATUS, "1"
211 };
212 const mesh_access_message_t mesh_foundation_config_friend_status = {
213         MESH_FOUNDATION_OPERATION_FRIEND_STATUS, "1"
214 };
215 const mesh_access_message_t mesh_foundation_config_gatt_proxy_status = {
216         MESH_FOUNDATION_OPERATION_GATT_PROXY_STATUS, "1"
217 };
218 const mesh_access_message_t mesh_foundation_config_relay_status = {
219         MESH_FOUNDATION_OPERATION_RELAY_STATUS, "11"
220 };
221 const mesh_access_message_t mesh_foundation_config_model_publication_status = {
222         MESH_FOUNDATION_OPERATION_MODEL_PUBLICATION_STATUS, "1222111m"
223 };
224 const mesh_access_message_t mesh_foundation_config_model_subscription_status = {
225         MESH_FOUNDATION_OPERATION_MODEL_SUBSCRIPTION_STATUS, "122m"
226 };
227 const mesh_access_message_t mesh_foundation_config_netkey_status = {
228         MESH_FOUNDATION_OPERATION_NETKEY_STATUS, "12"
229 };
230 const mesh_access_message_t mesh_foundation_config_appkey_status = {
231         MESH_FOUNDATION_OPERATION_APPKEY_STATUS, "13"
232 };
233 const mesh_access_message_t mesh_foundation_config_model_app_status = {
234         MESH_FOUNDATION_OPERATION_MODEL_APP_STATUS, "122m"
235 };
236 const mesh_access_message_t mesh_foundation_node_reset_status = {
237         MESH_FOUNDATION_OPERATION_NODE_RESET_STATUS, ""
238 };
239 const mesh_access_message_t mesh_foundation_config_heartbeat_publication_status = {
240         MESH_FOUNDATION_OPERATION_HEARTBEAT_PUBLICATION_STATUS, "1211122"
241 };
242 const mesh_access_message_t mesh_foundation_config_network_transmit_status = {
243         MESH_FOUNDATION_OPERATION_NETWORK_TRANSMIT_STATUS, "1"
244 };
245 const mesh_access_message_t mesh_foundation_node_identity_status = {
246         MESH_FOUNDATION_OPERATION_NODE_IDENTITY_STATUS, "121"
247 };
248 const mesh_access_message_t mesh_key_refresh_phase_status = {
249         MESH_FOUNDATION_OPERATION_KEY_REFRESH_PHASE_STATUS, "121"
250 };
251 const mesh_access_message_t mesh_foundation_low_power_node_poll_timeout_status = {
252         MESH_FOUNDATION_OPERATION_LOW_POWER_NODE_POLL_TIMEOUT_STATUS, "23"
253 };
254 const mesh_access_message_t mesh_foundation_config_heartbeat_subscription_status = {
255         MESH_FOUNDATION_OPERATION_HEARTBEAT_SUBSCRIPTION_STATUS, "1221111"
256 };
257 
258 static void config_server_send_message(uint16_t netkey_index, uint16_t dest, mesh_pdu_t *pdu){
259     // Configuration Server is on primary element and can only use DeviceKey
260     uint16_t appkey_index = MESH_DEVICE_KEY_INDEX;
261     uint16_t src          = mesh_node_get_primary_element_address();
262     uint8_t  ttl          = mesh_foundation_default_ttl_get();
263     mesh_upper_transport_setup_access_pdu_header(pdu, netkey_index, appkey_index, ttl, src, dest, 0);
264     mesh_access_send_unacknowledged_pdu(pdu);
265 }
266 
267 static void config_composition_data_status(uint16_t netkey_index, uint16_t dest){
268 
269     printf("Received Config Composition Data Get -> send Config Composition Data Status\n");
270 
271     mesh_transport_pdu_t * transport_pdu = mesh_access_transport_init(MESH_FOUNDATION_OPERATION_COMPOSITION_DATA_STATUS);
272     if (!transport_pdu) return;
273 
274     // page 0
275     mesh_access_transport_add_uint8(transport_pdu, 0);
276 
277     // CID
278     mesh_access_transport_add_uint16(transport_pdu, BLUETOOTH_COMPANY_ID_BLUEKITCHEN_GMBH);
279     // PID
280     mesh_access_transport_add_uint16(transport_pdu, 0);
281     // VID
282     mesh_access_transport_add_uint16(transport_pdu, 0);
283     // CRPL - number of protection list entries
284     mesh_access_transport_add_uint16(transport_pdu, 1);
285     // Features - Relay, Proxy, Friend, Lower Power, ...
286     mesh_access_transport_add_uint16(transport_pdu, 0);
287 
288     mesh_element_iterator_t element_it;
289     mesh_element_iterator_init(&element_it);
290     while (mesh_element_iterator_has_next(&element_it)){
291         mesh_element_t * element = mesh_element_iterator_next(&element_it);
292 
293         // Loc
294         mesh_access_transport_add_uint16(transport_pdu, element->loc);
295         // NumS
296         mesh_access_transport_add_uint8( transport_pdu, element->models_count_sig);
297         // NumV
298         mesh_access_transport_add_uint8( transport_pdu, element->models_count_vendor);
299 
300         mesh_model_iterator_t model_it;
301 
302         // SIG Models
303         mesh_model_iterator_init(&model_it, element);
304         while (mesh_model_iterator_has_next(&model_it)){
305             mesh_model_t * model = mesh_model_iterator_next(&model_it);
306             if (!mesh_model_is_bluetooth_sig(model->model_identifier)) continue;
307             mesh_access_transport_add_uint16(transport_pdu, model->model_identifier);
308         }
309         // Vendor Models
310         mesh_model_iterator_init(&model_it, element);
311         while (mesh_model_iterator_has_next(&model_it)){
312             mesh_model_t * model = mesh_model_iterator_next(&model_it);
313             if (mesh_model_is_bluetooth_sig(model->model_identifier)) continue;
314             mesh_access_transport_add_uint32(transport_pdu, model->model_identifier);
315         }
316     }
317 
318     // send as segmented access pdu
319     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
320 }
321 
322 static void config_composition_data_get_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
323     UNUSED(mesh_model);
324     config_composition_data_status(mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu));
325 
326     mesh_access_message_processed(pdu);
327 }
328 
329 static void config_model_beacon_status(mesh_model_t * mesh_model, uint16_t netkey_index, uint16_t dest){
330     UNUSED(mesh_model);
331     // setup message
332     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(&mesh_foundation_config_beacon_status,
333                                                                                mesh_foundation_beacon_get());
334     if (!transport_pdu) return;
335 
336     // send as segmented access pdu
337     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
338 }
339 
340 static void config_beacon_get_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
341     config_model_beacon_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu));
342 
343     mesh_access_message_processed(pdu);
344 }
345 
346 static void config_beacon_set_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
347     mesh_access_parser_state_t parser;
348     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
349 
350     uint8_t beacon_enabled = mesh_access_parser_get_u8(&parser);
351 
352     // beacon valid
353     if (beacon_enabled < MESH_FOUNDATION_STATE_NOT_SUPPORTED) {
354         // set and store new value
355         mesh_foundation_beacon_set(beacon_enabled);
356         mesh_foundation_state_store();
357 
358         // send status
359         config_model_beacon_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu));
360     }
361 
362     mesh_access_message_processed(pdu);
363 }
364 
365 static void config_model_default_ttl_status(mesh_model_t * mesh_model, uint16_t netkey_index, uint16_t dest){
366     UNUSED(mesh_model);
367     // setup message
368     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(
369             &mesh_foundation_config_default_ttl_status, mesh_foundation_default_ttl_get());
370     if (!transport_pdu) return;
371 
372     // send as segmented access pdu
373     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
374 }
375 
376 static void config_default_ttl_get_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
377     config_model_default_ttl_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu));
378 
379     mesh_access_message_processed(pdu);
380 }
381 
382 static void config_default_ttl_set_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
383     mesh_access_parser_state_t parser;
384     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
385 
386     uint8_t new_ttl = mesh_access_parser_get_u8(&parser);
387 
388     // validate (0x01 and > 0x7f are prohibited)
389     if (new_ttl <= 0x7f && new_ttl != 0x01) {
390 
391         // set and store
392         mesh_foundation_default_ttl_set(new_ttl);
393         mesh_foundation_state_store();
394 
395         // send status
396         config_model_default_ttl_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu));
397     }
398 
399     mesh_access_message_processed(pdu);
400 }
401 
402 static void config_friend_status(mesh_model_t * mesh_model, uint16_t netkey_index, uint16_t dest){
403     UNUSED(mesh_model);
404 
405     // setup message
406     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(
407             &mesh_foundation_config_friend_status, mesh_foundation_friend_get());
408     if (!transport_pdu) return;
409 
410     // send as segmented access pdu
411     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
412 }
413 
414 static void config_friend_get_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
415     config_friend_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu));
416 
417     mesh_access_message_processed(pdu);
418 }
419 
420 static void config_friend_set_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
421     mesh_access_parser_state_t parser;
422     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
423 
424     uint8_t new_friend_state = mesh_access_parser_get_u8(&parser);
425 
426     // validate
427     if (new_friend_state < MESH_FOUNDATION_STATE_NOT_SUPPORTED) {
428 
429         // set and store
430         if (mesh_foundation_friend_get() != MESH_FOUNDATION_STATE_NOT_SUPPORTED){
431             mesh_foundation_friend_set(new_friend_state);
432             mesh_foundation_state_store();
433         }
434 
435         // send status
436         config_friend_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu));
437     }
438 
439     mesh_access_message_processed(pdu);
440 }
441 
442 static void config_model_gatt_proxy_status(mesh_model_t * mesh_model, uint16_t netkey_index, uint16_t dest){
443     UNUSED(mesh_model);
444     // setup message
445     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(&mesh_foundation_config_gatt_proxy_status, mesh_foundation_gatt_proxy_get());
446     if (!transport_pdu) return;
447 
448     // send as segmented access pdu
449     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
450 }
451 
452 static void config_gatt_proxy_get_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
453     config_model_gatt_proxy_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu));
454 
455     mesh_access_message_processed(pdu);
456 }
457 
458 static void config_gatt_proxy_set_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
459     mesh_access_parser_state_t parser;
460     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
461 
462     uint8_t enabled = mesh_access_parser_get_u8(&parser);
463 
464     // validate
465     if (enabled <  MESH_FOUNDATION_STATE_NOT_SUPPORTED) {
466         // set and store
467         mesh_foundation_gatt_proxy_set(enabled);
468         mesh_foundation_state_store();
469 
470         // send status
471         config_model_gatt_proxy_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu));
472     }
473 
474     mesh_access_message_processed(pdu);
475 
476     // trigger heartbeat emit on change
477     mesh_configuration_server_feature_changed();
478 }
479 
480 static void config_model_relay_status(mesh_model_t * mesh_model, uint16_t netkey_index, uint16_t dest){
481     UNUSED(mesh_model);
482 
483     // setup message
484     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(&mesh_foundation_config_relay_status,
485                                                                                mesh_foundation_relay_get(),
486                                                                                mesh_foundation_relay_retransmit_get());
487     if (!transport_pdu) return;
488 
489     // send as segmented access pdu
490     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
491 }
492 
493 static void config_relay_get_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
494     config_model_relay_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu));
495 
496     mesh_access_message_processed(pdu);
497 }
498 
499 static void config_relay_set_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
500 
501     mesh_access_parser_state_t parser;
502     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
503 
504     // check if valid
505     uint8_t relay            = mesh_access_parser_get_u8(&parser);
506     uint8_t relay_retransmit = mesh_access_parser_get_u8(&parser);
507 
508     // check if valid
509     if (relay <= 1) {
510         // only update if supported
511         if (mesh_foundation_relay_get() != MESH_FOUNDATION_STATE_NOT_SUPPORTED){
512             mesh_foundation_relay_set(relay);
513             mesh_foundation_relay_retransmit_set(relay_retransmit);
514             mesh_foundation_state_store();
515         }
516 
517         // send status
518         config_model_relay_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu));
519     }
520 
521     mesh_access_message_processed(pdu);
522 
523     // trigger heartbeat emit on change
524     mesh_configuration_server_feature_changed();
525 }
526 
527 static void config_model_network_transmit_status(mesh_model_t * mesh_model, uint16_t netkey_index, uint16_t dest){
528     UNUSED(mesh_model);
529 
530     // setup message
531     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(
532             &mesh_foundation_config_network_transmit_status, mesh_foundation_network_transmit_get());
533     if (!transport_pdu) return;
534 
535     // send as segmented access pdu
536     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
537 }
538 
539 static void config_model_network_transmit_get_handler(mesh_model_t * mesh_model, mesh_pdu_t * pdu){
540     config_model_network_transmit_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu));
541 
542     mesh_access_message_processed(pdu);
543 }
544 
545 static void config_model_network_transmit_set_handler(mesh_model_t * mesh_model, mesh_pdu_t * pdu){
546     mesh_access_parser_state_t parser;
547     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
548 
549     uint8_t new_ttl = mesh_access_parser_get_u8(&parser);
550 
551     // store
552     mesh_foundation_network_transmit_set(new_ttl);
553     mesh_foundation_state_store();
554 
555     //
556     config_model_network_transmit_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu));
557 
558     mesh_access_message_processed(pdu);
559 }
560 
561 // NetKey List
562 
563 void config_nekey_list_set_max(uint16_t max){
564     config_netkey_list_max = max;
565 }
566 
567 static void config_netkey_status(mesh_model_t * mesh_model, uint16_t netkey_index, uint16_t dest, uint8_t status, uint16_t new_netkey_index){
568     UNUSED(mesh_model);
569 
570     // setup message
571     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(
572             &mesh_foundation_config_netkey_status, status, new_netkey_index);
573     if (!transport_pdu) return;
574 
575     // send as segmented access pdu
576     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
577 }
578 
579 static void config_netkey_list(mesh_model_t * mesh_model, uint16_t netkey_index, uint16_t dest) {
580     UNUSED(mesh_model);
581 
582     mesh_transport_pdu_t * transport_pdu = mesh_access_transport_init(MESH_FOUNDATION_OPERATION_NETKEY_LIST);
583     if (!transport_pdu) return;
584 
585     // add list of netkey indexes
586     mesh_network_key_iterator_t it;
587     mesh_network_key_iterator_init(&it);
588     while (mesh_network_key_iterator_has_more(&it)){
589         mesh_network_key_t * network_key = mesh_network_key_iterator_get_next(&it);
590         mesh_access_transport_add_uint16(transport_pdu, network_key->netkey_index);
591     }
592 
593     // send as segmented access pdu
594     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
595 }
596 
597 static void config_netkey_add_derived(void * arg){
598     mesh_subnet_t * subnet = (mesh_subnet_t *) arg;
599 
600     // store network key
601     mesh_store_network_key(subnet->old_key);
602 
603     // add key to NetKey List
604     mesh_network_key_add(subnet->old_key);
605 
606     // add subnet
607     mesh_subnet_add(subnet);
608 
609 #ifdef ENABLE_MESH_PROXY_SERVER
610     mesh_proxy_start_advertising_with_network_id();
611 #endif
612 
613     config_netkey_status(mesh_model_get_configuration_server(), mesh_pdu_netkey_index(access_pdu_in_process), mesh_pdu_src(access_pdu_in_process), MESH_FOUNDATION_STATUS_SUCCESS, subnet->netkey_index);
614     mesh_access_message_processed(access_pdu_in_process);
615 }
616 
617 static void config_netkey_add_handler(mesh_model_t * mesh_model, mesh_pdu_t * pdu){
618     mesh_access_parser_state_t parser;
619     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
620 
621     // get params
622     uint8_t new_netkey[16];
623     uint16_t new_netkey_index = mesh_access_parser_get_u16(&parser);
624     mesh_access_parser_get_key(&parser, new_netkey);
625 
626     uint8_t status;
627 
628     const mesh_subnet_t * existing_subnet = mesh_subnet_get_by_netkey_index(new_netkey_index);
629     if (existing_subnet == NULL){
630 
631         // check limit for pts
632         uint16_t internal_index = mesh_network_key_get_free_index();
633         if (internal_index == MESH_KEYS_INVALID_INDEX || (config_netkey_list_max && mesh_network_key_list_count() >= config_netkey_list_max)){
634             status = MESH_FOUNDATION_STATUS_INSUFFICIENT_RESOURCES;
635         } else {
636 
637             // allocate new key and subnet
638             mesh_network_key_t * new_network_key = btstack_memory_mesh_network_key_get();
639             mesh_subnet_t * new_subnet = btstack_memory_mesh_subnet_get();
640 
641             if (new_network_key == NULL || new_subnet == NULL){
642                 if (new_network_key != NULL){
643                     btstack_memory_mesh_network_key_free(new_network_key);
644                 }
645                 if (new_subnet != NULL){
646                     btstack_memory_mesh_subnet_free(new_subnet);
647                 }
648                 status = MESH_FOUNDATION_STATUS_INSUFFICIENT_RESOURCES;
649 
650             } else {
651 
652                 // setup key
653                 new_network_key->internal_index = internal_index;
654                 new_network_key->netkey_index   = new_netkey_index;
655                 memcpy(new_network_key->net_key, new_netkey, 16);
656 
657                 // setup subnet
658                 new_subnet->old_key = new_network_key;
659                 new_subnet->netkey_index = new_netkey_index;
660                 new_subnet->key_refresh = MESH_KEY_REFRESH_NOT_ACTIVE;
661 
662                 // derive other keys
663                 access_pdu_in_process = pdu;
664                 mesh_network_key_derive(&configuration_server_cmac_request, new_network_key, config_netkey_add_derived, new_subnet);
665                 return;
666             }
667         }
668 
669     } else {
670         // network key for netkey index already exists
671         if (memcmp(existing_subnet->old_key->net_key, new_netkey, 16) == 0){
672             // same netkey
673             status = MESH_FOUNDATION_STATUS_SUCCESS;
674         } else {
675             // different netkey
676             status = MESH_FOUNDATION_STATUS_KEY_INDEX_ALREADY_STORED;
677         }
678     }
679 
680     // report status
681     config_netkey_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, new_netkey_index);
682     mesh_access_message_processed(pdu);
683 }
684 
685 static void config_netkey_update_derived(void * arg){
686     mesh_subnet_t * subnet = (mesh_subnet_t *) arg;
687 
688     // store network key
689     mesh_store_network_key(subnet->new_key);
690 
691     // add key to NetKey List
692     mesh_network_key_add(subnet->new_key);
693 
694     // update subnet - Key Refresh Phase 1
695     subnet->key_refresh = MESH_KEY_REFRESH_FIRST_PHASE;
696 
697     // report status
698     config_netkey_status(mesh_model_get_configuration_server(), mesh_pdu_netkey_index(access_pdu_in_process), mesh_pdu_src(access_pdu_in_process), MESH_FOUNDATION_STATUS_SUCCESS, subnet->netkey_index);
699     mesh_access_message_processed(access_pdu_in_process);
700 }
701 
702 static void config_netkey_update_handler(mesh_model_t * mesh_model, mesh_pdu_t * pdu) {
703     mesh_access_parser_state_t parser;
704     mesh_access_parser_init(&parser, (mesh_pdu_t *) pdu);
705 
706     // get params
707     uint8_t new_netkey[16];
708     uint16_t netkey_index = mesh_access_parser_get_u16(&parser);
709     mesh_access_parser_get_key(&parser, new_netkey);
710 
711     // get existing subnet
712     mesh_subnet_t * subnet = mesh_subnet_get_by_netkey_index(netkey_index);
713     if (subnet == NULL){
714         config_netkey_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), MESH_FOUNDATION_STATUS_INVALID_NETKEY_INDEX, netkey_index);
715         mesh_access_message_processed(access_pdu_in_process);
716         return;
717     }
718 
719     // get index for new key
720     uint16_t internal_index = mesh_network_key_get_free_index();
721     if (internal_index == MESH_KEYS_INVALID_INDEX){
722         config_netkey_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), MESH_FOUNDATION_STATUS_INSUFFICIENT_RESOURCES, netkey_index);
723         mesh_access_message_processed(access_pdu_in_process);
724         return;
725     }
726 
727     // get new key
728     mesh_network_key_t * new_network_key = btstack_memory_mesh_network_key_get();
729     if (new_network_key == NULL){
730         config_netkey_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), MESH_FOUNDATION_STATUS_INSUFFICIENT_RESOURCES, netkey_index);
731         mesh_access_message_processed(access_pdu_in_process);
732         return;
733     }
734 
735     // setup new key
736     new_network_key->internal_index = internal_index;
737     new_network_key->netkey_index   = netkey_index;
738     new_network_key->version        = (uint8_t)(subnet->old_key->version + 1);
739     memcpy(new_network_key->net_key, new_netkey, 16);
740 
741     // store in subnet (not active yet)
742     subnet->new_key = new_network_key;
743 
744     // derive other keys
745     access_pdu_in_process = pdu;
746     mesh_network_key_derive(&configuration_server_cmac_request, new_network_key, config_netkey_update_derived, subnet);
747 }
748 
749 static void config_netkey_delete_handler(mesh_model_t * mesh_model, mesh_pdu_t * pdu) {
750     mesh_access_parser_state_t parser;
751     mesh_access_parser_init(&parser, (mesh_pdu_t *) pdu);
752 
753     // get params
754     uint16_t netkey_index_to_remove = mesh_access_parser_get_u16(&parser);
755 
756     // get message netkey
757     uint16_t netkey_index_pdu = mesh_pdu_netkey_index(pdu);
758 
759     // remove subnet
760     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
761     mesh_subnet_t * subnet = mesh_subnet_get_by_netkey_index(netkey_index_to_remove);
762     if (subnet != NULL){
763         // A NetKey shall not be deleted from the NetKey List using a message secured with this NetKey.
764         // Also prevents deleting the last network key
765         if (netkey_index_to_remove != netkey_index_pdu){
766 
767             // remove all appkeys for this netkey
768             mesh_transport_key_iterator_t it;
769             mesh_transport_key_iterator_init(&it, netkey_index_to_remove);
770             while (mesh_transport_key_iterator_has_more(&it)){
771                 mesh_transport_key_t * transport_key = mesh_transport_key_iterator_get_next(&it);
772                 mesh_configuration_server_delete_appkey(transport_key);
773             }
774 
775             // delete old/current key
776             mesh_access_netkey_finalize(subnet->old_key);
777             subnet->old_key = NULL;
778 
779             // delete new key
780             if (subnet->new_key != NULL){
781                 mesh_access_netkey_finalize(subnet->new_key);
782                 subnet->new_key = NULL;
783             }
784 
785             // remove subnet
786             mesh_subnet_remove(subnet);
787             btstack_memory_mesh_subnet_free(subnet);
788 
789         } else {
790             status = MESH_FOUNDATION_STATUS_CANNOT_REMOVE;
791         }
792     }
793     config_netkey_status(mesh_model, netkey_index_pdu, mesh_pdu_src(pdu), status, netkey_index_to_remove);
794     mesh_access_message_processed(pdu);
795 }
796 
797 static void config_netkey_get_handler(mesh_model_t * mesh_model, mesh_pdu_t * pdu){
798     config_netkey_list(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu));
799     mesh_access_message_processed(pdu);
800 }
801 
802 // AppKey List
803 
804 static void config_appkey_status(mesh_model_t * mesh_model, uint16_t netkey_index, uint16_t dest, uint32_t netkey_and_appkey_index, uint8_t status){
805     UNUSED(mesh_model);
806 
807     // setup message
808     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(&mesh_foundation_config_appkey_status,
809                                                                                status, netkey_and_appkey_index);
810     if (!transport_pdu) return;
811 
812     // send as segmented access pdu
813     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
814 }
815 
816 static void config_appkey_list(mesh_model_t * mesh_model, uint16_t netkey_index, uint16_t dest, uint32_t netkey_index_of_list){
817     UNUSED(mesh_model);
818 
819     mesh_transport_pdu_t * transport_pdu = mesh_access_transport_init(MESH_FOUNDATION_OPERATION_APPKEY_LIST);
820     if (!transport_pdu) return;
821 
822     // check netkey_index is valid
823     mesh_network_key_t * network_key = mesh_network_key_list_get(netkey_index_of_list);
824     uint8_t status;
825     if (network_key == NULL){
826         status = MESH_FOUNDATION_STATUS_INVALID_NETKEY_INDEX;
827     } else {
828         status = MESH_FOUNDATION_STATUS_SUCCESS;
829     }
830     mesh_access_transport_add_uint8(transport_pdu, status);
831     mesh_access_transport_add_uint16(transport_pdu, netkey_index_of_list);
832 
833     // add list of appkey indexes
834     mesh_transport_key_iterator_t it;
835     mesh_transport_key_iterator_init(&it, netkey_index_of_list);
836     while (mesh_transport_key_iterator_has_more(&it)){
837         mesh_transport_key_t * transport_key = mesh_transport_key_iterator_get_next(&it);
838         mesh_access_transport_add_uint16(transport_pdu, transport_key->appkey_index);
839     }
840 
841     // send as segmented access pdu
842     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
843 }
844 
845 static void config_appkey_add_or_update_aid(void *arg){
846     mesh_transport_key_t * transport_key = (mesh_transport_key_t *) arg;
847 
848     printf("Config Appkey Add/Update: NetKey Index 0x%04x, AppKey Index 0x%04x, AID %02x: ", transport_key->netkey_index, transport_key->appkey_index, transport_key->aid);
849     printf_hexdump(transport_key->key, 16);
850 
851     // store in TLV
852     mesh_store_app_key(transport_key);
853 
854     // add app key
855     mesh_transport_key_add(transport_key);
856 
857     uint32_t netkey_and_appkey_index = (transport_key->appkey_index << 12) | transport_key->netkey_index;
858     config_appkey_status(mesh_model_get_configuration_server(),  mesh_pdu_netkey_index(access_pdu_in_process), mesh_pdu_src(access_pdu_in_process), netkey_and_appkey_index, MESH_FOUNDATION_STATUS_SUCCESS);
859 
860     mesh_access_message_processed(access_pdu_in_process);
861 }
862 
863 static void config_appkey_add_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu) {
864 
865     mesh_access_parser_state_t parser;
866     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
867 
868     // netkey and appkey index
869     uint32_t netkey_and_appkey_index = mesh_access_parser_get_u24(&parser);
870     uint16_t netkey_index = netkey_and_appkey_index & 0xfff;
871     uint16_t appkey_index = netkey_and_appkey_index >> 12;
872 
873     // actual key
874     uint8_t  appkey[16];
875     mesh_access_parser_get_key(&parser, appkey);
876 
877     // check netkey_index is valid
878     mesh_network_key_t * network_key = mesh_network_key_list_get(netkey_index);
879     if (network_key == NULL){
880         config_appkey_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), netkey_and_appkey_index, MESH_FOUNDATION_STATUS_INVALID_NETKEY_INDEX);
881         mesh_access_message_processed(pdu);
882         return;
883     }
884 
885     // check if appkey already exists
886     mesh_transport_key_t * transport_key = mesh_transport_key_get(appkey_index);
887     if (transport_key){
888         uint8_t status;
889         if (transport_key->netkey_index != netkey_index){
890             // already stored but with different netkey
891             status = MESH_FOUNDATION_STATUS_INVALID_NETKEY_INDEX;
892         } else if (memcmp(transport_key->key, appkey, 16) == 0){
893             // key identical
894             status = MESH_FOUNDATION_STATUS_SUCCESS;
895         } else {
896             // key differs
897             status = MESH_FOUNDATION_STATUS_KEY_INDEX_ALREADY_STORED;
898         }
899         config_appkey_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), netkey_and_appkey_index, status);
900         mesh_access_message_processed(pdu);
901         return;
902     }
903 
904     // create app key (first get free slot in transport key table)
905     mesh_transport_key_t * app_key = NULL;
906     uint16_t internal_index = mesh_transport_key_get_free_index();
907     if (internal_index > 0){
908         app_key = btstack_memory_mesh_transport_key_get();
909     }
910     if (app_key == NULL) {
911         config_appkey_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), netkey_and_appkey_index, MESH_FOUNDATION_STATUS_INSUFFICIENT_RESOURCES);
912         mesh_access_message_processed(pdu);
913         return;
914     }
915 
916     // store data
917     app_key->internal_index = internal_index;
918     app_key->akf = 1;
919     app_key->appkey_index = appkey_index;
920     app_key->netkey_index = netkey_index;
921     app_key->version = 0;
922     app_key->old_key = 0;
923 
924     memcpy(app_key->key, appkey, 16);
925 
926     // calculate AID
927     access_pdu_in_process = pdu;
928     mesh_transport_key_calc_aid(&configuration_server_cmac_request, app_key, config_appkey_add_or_update_aid, app_key);
929 }
930 
931 static void config_appkey_update_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu) {
932 
933     mesh_access_parser_state_t parser;
934     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
935 
936     // netkey and appkey index
937     uint32_t netkey_and_appkey_index = mesh_access_parser_get_u24(&parser);
938     uint16_t netkey_index = netkey_and_appkey_index & 0xfff;
939     uint16_t appkey_index = netkey_and_appkey_index >> 12;
940 
941     // actual key
942     uint8_t  appkey[16];
943     mesh_access_parser_get_key(&parser, appkey);
944 
945 
946 // for PTS testing
947     // check netkey_index is valid
948     mesh_network_key_t * network_key = mesh_network_key_list_get(netkey_index);
949     if (network_key == NULL){
950         config_appkey_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), netkey_and_appkey_index, MESH_FOUNDATION_STATUS_INVALID_NETKEY_INDEX);
951         mesh_access_message_processed(pdu);
952         return;
953     }
954 
955     // check if appkey already exists
956     mesh_transport_key_t * existing_app_key = mesh_transport_key_get(appkey_index);
957     if (!existing_app_key) {
958         config_appkey_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), netkey_and_appkey_index, MESH_FOUNDATION_STATUS_INVALID_APPKEY_INDEX);
959         mesh_access_message_processed(pdu);
960         return;
961     }
962 
963     if (existing_app_key->netkey_index != netkey_index){
964         // already stored but with different netkey
965         config_appkey_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), netkey_and_appkey_index, MESH_FOUNDATION_STATUS_INVALID_BINDING);
966         mesh_access_message_processed(pdu);
967         return;
968     }
969 
970     if (memcmp(existing_app_key->key, appkey, 16) == 0){
971         // key identical
972         config_appkey_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), netkey_and_appkey_index, MESH_FOUNDATION_STATUS_SUCCESS);
973         mesh_access_message_processed(pdu);
974         return;
975     }
976 
977     // create app key
978     mesh_transport_key_t * new_app_key = NULL;
979     uint16_t internal_index = mesh_transport_key_get_free_index();
980     if (internal_index > 0){
981         new_app_key = btstack_memory_mesh_transport_key_get();
982     }
983     if (new_app_key == NULL) {
984         config_appkey_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), netkey_and_appkey_index, MESH_FOUNDATION_STATUS_INSUFFICIENT_RESOURCES);
985         mesh_access_message_processed(pdu);
986         return;
987     }
988 
989     // store data
990     new_app_key->internal_index = internal_index;
991     new_app_key->appkey_index = appkey_index;
992     new_app_key->netkey_index = netkey_index;
993     new_app_key->key_refresh  = 1;
994     new_app_key->version = (uint8_t)(existing_app_key->version + 1);
995     memcpy(new_app_key->key, appkey, 16);
996 
997     // mark old key
998     existing_app_key->old_key = 1;
999 
1000     // calculate AID
1001     access_pdu_in_process = pdu;
1002     mesh_transport_key_calc_aid(&configuration_server_cmac_request, new_app_key, config_appkey_add_or_update_aid, new_app_key);
1003 }
1004 
1005 static void config_appkey_delete_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu) {
1006     mesh_access_parser_state_t parser;
1007     mesh_access_parser_init(&parser, (mesh_pdu_t *) pdu);
1008 
1009     // netkey and appkey index
1010     uint32_t netkey_and_appkey_index = mesh_access_parser_get_u24(&parser);
1011     uint16_t netkey_index = netkey_and_appkey_index & 0xfff;
1012     uint16_t appkey_index = netkey_and_appkey_index >> 12;
1013 
1014     // check netkey_index is valid
1015     mesh_network_key_t * network_key = mesh_network_key_list_get(netkey_index);
1016     if (network_key == NULL){
1017         config_appkey_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), netkey_and_appkey_index, MESH_FOUNDATION_STATUS_INVALID_NETKEY_INDEX);
1018         mesh_access_message_processed(pdu);
1019         return;
1020     }
1021 
1022     // check if appkey already exists
1023     mesh_transport_key_t * transport_key = mesh_transport_key_get(appkey_index);
1024     if (transport_key){
1025         mesh_configuration_server_delete_appkey(transport_key);
1026     }
1027 
1028     config_appkey_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), netkey_and_appkey_index, MESH_FOUNDATION_STATUS_SUCCESS);
1029     mesh_access_message_processed(pdu);
1030 }
1031 
1032 static void config_appkey_get_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu) {
1033     mesh_access_parser_state_t parser;
1034     mesh_access_parser_init(&parser, (mesh_pdu_t *) pdu);
1035     uint16_t netkey_index = mesh_access_parser_get_u16(&parser);
1036 
1037     config_appkey_list(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), netkey_index);
1038     mesh_access_message_processed(pdu);
1039 }
1040 
1041 // Configuration Model Subscriptions (messages)
1042 
1043 static void config_model_subscription_list(mesh_model_t * mesh_model, uint16_t netkey_index, uint16_t dest, uint8_t status, uint16_t element_address, uint32_t model_identifier, mesh_model_t * target_model){
1044     UNUSED(mesh_model);
1045 
1046     uint16_t opcode;
1047     if (mesh_model_is_bluetooth_sig(model_identifier)){
1048         opcode = MESH_FOUNDATION_OPERATION_SIG_MODEL_SUBSCRIPTION_LIST;
1049     } else {
1050         opcode = MESH_FOUNDATION_OPERATION_VENDOR_MODEL_SUBSCRIPTION_LIST;
1051     }
1052 
1053     mesh_transport_pdu_t * transport_pdu = mesh_access_transport_init(opcode);
1054     if (!transport_pdu) return;
1055 
1056     // setup segmented message
1057     mesh_access_transport_add_uint8(transport_pdu, status);
1058     mesh_access_transport_add_uint16(transport_pdu, element_address);
1059     mesh_access_transport_add_model_identifier(transport_pdu, model_identifier);
1060 
1061     if (target_model != NULL){
1062         uint16_t i;
1063         for (i = 0; i < MAX_NR_MESH_SUBSCRIPTION_PER_MODEL; i++){
1064             uint16_t address = target_model->subscriptions[i];
1065             if (address == MESH_ADDRESS_UNSASSIGNED) continue;
1066             if (mesh_network_address_virtual(address)) {
1067                 mesh_virtual_address_t * virtual_address = mesh_virtual_address_for_pseudo_dst(address);
1068                 if (virtual_address == NULL) continue;
1069                 address = virtual_address->hash;
1070             }
1071             mesh_access_transport_add_uint16(transport_pdu, address);
1072         }
1073     }
1074     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
1075 }
1076 
1077 static void config_model_subscription_get_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
1078     mesh_access_parser_state_t parser;
1079     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1080 
1081     uint16_t element_address  = mesh_access_parser_get_u16(&parser);
1082     uint32_t model_identifier = mesh_access_parser_get_model_identifier(&parser);
1083 
1084     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
1085     mesh_model_t * target_model = mesh_access_model_for_address_and_model_identifier(element_address, model_identifier, &status);
1086 
1087     config_model_subscription_list(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, element_address, model_identifier, target_model);
1088     mesh_access_message_processed(pdu);
1089 }
1090 
1091 static void config_model_subscription_status(mesh_model_t * mesh_model, uint16_t netkey_index, uint16_t dest, uint8_t status, uint16_t element_address, uint16_t address, uint32_t model_identifier){
1092     UNUSED(mesh_model);
1093 
1094     // setup message
1095     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(&mesh_foundation_config_model_subscription_status,
1096                                                                                 status, element_address, address, model_identifier);
1097     if (!transport_pdu) return;
1098     // send as segmented access pdu
1099     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
1100 }
1101 
1102 static void config_model_subscription_add_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu) {
1103     mesh_access_parser_state_t parser;
1104     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1105 
1106     uint16_t element_address  = mesh_access_parser_get_u16(&parser);
1107     uint16_t address          = mesh_access_parser_get_u16(&parser);
1108     uint32_t model_identifier = mesh_access_parser_get_model_identifier(&parser);
1109 
1110     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
1111     mesh_model_t * target_model = mesh_access_model_for_address_and_model_identifier(element_address, model_identifier, &status);
1112 
1113     if (target_model != NULL){
1114         if (mesh_network_address_group(address) && !mesh_network_address_all_nodes(address)){
1115             status = mesh_model_add_subscription(target_model, address);
1116             if (status == MESH_FOUNDATION_STATUS_SUCCESS){
1117                 mesh_model_store_subscriptions(target_model);
1118             }
1119         } else {
1120             status = MESH_FOUNDATION_STATUS_INVALID_ADDRESS;
1121         }
1122     }
1123 
1124     config_model_subscription_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, element_address, address, model_identifier);
1125     mesh_access_message_processed(pdu);
1126 }
1127 
1128 static void config_model_subscription_virtual_address_add_hash(void *arg){
1129     mesh_model_t * target_model = (mesh_model_t*) arg;
1130     mesh_model_t * mesh_model = mesh_model_get_configuration_server();
1131 
1132     // add if not exists
1133     mesh_virtual_address_t * virtual_address = mesh_virtual_address_for_label_uuid(configuration_server_label_uuid);
1134     if (virtual_address == NULL){
1135         virtual_address = mesh_virtual_address_register(configuration_server_label_uuid, configuration_server_hash);
1136     }
1137 
1138     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
1139     uint16_t hash_dst   = MESH_ADDRESS_UNSASSIGNED;
1140     if (virtual_address == NULL){
1141         status = MESH_FOUNDATION_STATUS_INSUFFICIENT_RESOURCES;
1142     } else {
1143         if (!mesh_model_contains_subscription(target_model,  virtual_address->pseudo_dst)){
1144             status = mesh_model_add_subscription(target_model,  virtual_address->pseudo_dst);
1145             if (status == MESH_FOUNDATION_STATUS_SUCCESS){
1146                 hash_dst = virtual_address->hash;
1147                 mesh_virtual_address_increase_refcount(virtual_address);
1148                 mesh_model_store_subscriptions(target_model);
1149             }
1150         }
1151     }
1152 
1153     config_model_subscription_status(mesh_model, mesh_pdu_netkey_index(access_pdu_in_process), mesh_pdu_src(access_pdu_in_process), status, configuration_server_element_address, hash_dst, target_model->model_identifier);
1154     mesh_access_message_processed(access_pdu_in_process);
1155     return;
1156 }
1157 
1158 static void config_model_subscription_virtual_address_add_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu) {
1159     mesh_access_parser_state_t parser;
1160     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1161 
1162     // ElementAddress - Address of the element - should be us
1163     configuration_server_element_address = mesh_access_parser_get_u16(&parser);
1164 
1165     // store label uuid
1166     mesh_access_parser_get_label_uuid(&parser, configuration_server_label_uuid);
1167 
1168     // Model Identifier
1169     uint32_t model_identifier = mesh_access_parser_get_model_identifier(&parser);
1170 
1171     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
1172     mesh_model_t * target_model = mesh_access_model_for_address_and_model_identifier(configuration_server_element_address, model_identifier, &status);
1173 
1174     if (target_model == NULL){
1175         config_model_subscription_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, configuration_server_element_address, MESH_ADDRESS_UNSASSIGNED, model_identifier);
1176         mesh_access_message_processed(pdu);
1177         return;
1178     }
1179 
1180     access_pdu_in_process = pdu;
1181     mesh_virtual_address(&configuration_server_cmac_request, configuration_server_label_uuid, &configuration_server_hash, &config_model_subscription_virtual_address_add_hash, target_model);
1182 }
1183 
1184 static void config_model_subscription_overwrite_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
1185     mesh_access_parser_state_t parser;
1186     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1187 
1188     uint16_t element_address  = mesh_access_parser_get_u16(&parser);
1189     uint16_t address          = mesh_access_parser_get_u16(&parser);
1190     uint32_t model_identifier = mesh_access_parser_get_model_identifier(&parser);
1191 
1192     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
1193     mesh_model_t * target_model = mesh_access_model_for_address_and_model_identifier(element_address, model_identifier, &status);
1194 
1195     if (target_model != NULL){
1196         if (mesh_network_address_group(address) && !mesh_network_address_all_nodes(address)){
1197             mesh_subcription_decrease_virtual_address_ref_count(target_model);
1198             mesh_model_delete_all_subscriptions(target_model);
1199             mesh_model_add_subscription(target_model, address);
1200             mesh_model_store_subscriptions(target_model);
1201         } else {
1202             status = MESH_FOUNDATION_STATUS_INVALID_ADDRESS;
1203         }
1204     }
1205 
1206     config_model_subscription_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, element_address, address, model_identifier);
1207     mesh_access_message_processed(pdu);
1208 }
1209 
1210 static void config_model_subscription_virtual_address_overwrite_hash(void *arg){
1211     mesh_model_t * target_model = (mesh_model_t*) arg;
1212     mesh_model_t * mesh_model = mesh_model_get_configuration_server();
1213 
1214     // add if not exists
1215     mesh_virtual_address_t * virtual_address = mesh_virtual_address_for_label_uuid(configuration_server_label_uuid);
1216     if (virtual_address == NULL){
1217         virtual_address = mesh_virtual_address_register(configuration_server_label_uuid, configuration_server_hash);
1218     }
1219 
1220     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
1221     uint16_t address = MESH_ADDRESS_UNSASSIGNED;;
1222     if (virtual_address == NULL){
1223         status = MESH_FOUNDATION_STATUS_INSUFFICIENT_RESOURCES;
1224     } else {
1225         address = configuration_server_hash;
1226 
1227         // increase refcount first to avoid flash delete + add in a row
1228         mesh_virtual_address_increase_refcount(virtual_address);
1229 
1230         // decrease ref counts for virtual addresses in subscription
1231         mesh_subcription_decrease_virtual_address_ref_count(target_model);
1232 
1233         // clear subscriptions
1234         mesh_model_delete_all_subscriptions(target_model);
1235 
1236         // add new subscription (successfull if MAX_NR_MESH_SUBSCRIPTION_PER_MODEL > 0)
1237         mesh_model_add_subscription(target_model, virtual_address->pseudo_dst);
1238 
1239         mesh_model_store_subscriptions(target_model);
1240     }
1241 
1242     config_model_subscription_status(mesh_model, mesh_pdu_netkey_index(access_pdu_in_process), mesh_pdu_src(access_pdu_in_process), status, configuration_server_element_address, address, target_model->model_identifier);
1243     mesh_access_message_processed(access_pdu_in_process);
1244     return;
1245 }
1246 
1247 static void config_model_subscription_virtual_address_overwrite_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu) {
1248     mesh_access_parser_state_t parser;
1249     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1250 
1251     // ElementAddress - Address of the element - should be us
1252     configuration_server_element_address = mesh_access_parser_get_u16(&parser);
1253 
1254     // store label uuid
1255     mesh_access_parser_get_label_uuid(&parser, configuration_server_label_uuid);
1256 
1257     // Model Identifier
1258     uint32_t model_identifier = mesh_access_parser_get_model_identifier(&parser);
1259 
1260     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
1261     mesh_model_t * target_model = mesh_access_model_for_address_and_model_identifier(configuration_server_element_address, model_identifier, &status);
1262 
1263     if (target_model == NULL){
1264         config_model_subscription_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, configuration_server_element_address, MESH_ADDRESS_UNSASSIGNED, model_identifier);
1265         mesh_access_message_processed(pdu);
1266         return;
1267     }
1268     access_pdu_in_process = pdu;
1269     mesh_virtual_address(&configuration_server_cmac_request, configuration_server_label_uuid, &configuration_server_hash, &config_model_subscription_virtual_address_overwrite_hash, target_model);
1270 }
1271 
1272 static void config_model_subscription_delete_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
1273     mesh_access_parser_state_t parser;
1274     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1275 
1276     uint16_t element_address  = mesh_access_parser_get_u16(&parser);
1277     uint16_t address          = mesh_access_parser_get_u16(&parser);
1278     uint32_t model_identifier = mesh_access_parser_get_model_identifier(&parser);
1279 
1280     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
1281     mesh_model_t * target_model = mesh_access_model_for_address_and_model_identifier(element_address, model_identifier, &status);
1282 
1283     if (target_model != NULL){
1284         if (mesh_network_address_group(address) && !mesh_network_address_all_nodes(address)){
1285             mesh_model_delete_subscription(target_model, address);
1286             mesh_model_store_subscriptions(target_model);
1287         } else {
1288             status = MESH_FOUNDATION_STATUS_INVALID_ADDRESS;
1289         }
1290     }
1291 
1292     config_model_subscription_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, element_address, address, model_identifier);
1293     mesh_access_message_processed(pdu);
1294 }
1295 
1296 static void config_model_subscription_virtual_address_delete_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
1297     mesh_access_parser_state_t parser;
1298     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1299 
1300     uint16_t element_address  = mesh_access_parser_get_u16(&parser);
1301     mesh_access_parser_get_label_uuid(&parser, configuration_server_label_uuid);
1302     uint32_t model_identifier = mesh_access_parser_get_model_identifier(&parser);
1303 
1304     mesh_virtual_address_t * virtual_address = mesh_virtual_address_for_label_uuid(configuration_server_label_uuid);
1305     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
1306     mesh_model_t * target_model = mesh_access_model_for_address_and_model_identifier(element_address, model_identifier, &status);
1307     uint16_t address = MESH_ADDRESS_UNSASSIGNED;
1308 
1309     if ((target_model != NULL) && (virtual_address != NULL) && mesh_model_contains_subscription(target_model, virtual_address->pseudo_dst)){
1310         address = virtual_address->hash;
1311         mesh_model_delete_subscription(target_model, virtual_address->pseudo_dst);
1312         mesh_model_store_subscriptions(target_model);
1313         mesh_virtual_address_decrease_refcount(virtual_address);
1314      }
1315 
1316     config_model_subscription_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, element_address,address, model_identifier);
1317     mesh_access_message_processed(pdu);
1318 }
1319 
1320 static void config_model_subscription_delete_all_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
1321     mesh_access_parser_state_t parser;
1322     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1323 
1324     uint16_t element_address  = mesh_access_parser_get_u16(&parser);
1325     uint32_t model_identifier = mesh_access_parser_get_model_identifier(&parser);
1326 
1327     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
1328     mesh_model_t * target_model = mesh_access_model_for_address_and_model_identifier(element_address, model_identifier, &status);
1329 
1330     if (target_model != NULL){
1331         mesh_subcription_decrease_virtual_address_ref_count(target_model);
1332         mesh_model_delete_all_subscriptions(target_model);
1333         mesh_model_store_subscriptions(target_model);
1334     }
1335 
1336     config_model_subscription_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, element_address, MESH_ADDRESS_UNSASSIGNED, model_identifier);
1337     mesh_access_message_processed(pdu);
1338 }
1339 
1340 // Configuration Model to AppKey List
1341 
1342 static void config_model_app_status(mesh_model_t * mesh_model, uint16_t netkey_index, uint16_t dest, uint8_t status, uint16_t element_address, uint16_t appkey_index, uint32_t model_identifier){
1343     UNUSED(mesh_model);
1344 
1345     // setup message
1346     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(&mesh_foundation_config_model_app_status,
1347                                                             status, element_address, appkey_index, model_identifier);
1348     if (!transport_pdu) return;
1349 
1350     // send as segmented access pdu
1351     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
1352 }
1353 
1354 static void config_model_app_list(mesh_model_t * config_server_model, uint16_t netkey_index, uint16_t dest, uint8_t status, uint16_t element_address, uint32_t model_identifier, mesh_model_t * mesh_model){
1355     UNUSED(config_server_model);
1356 
1357     uint16_t opcode;
1358     if (mesh_model_is_bluetooth_sig(model_identifier)){
1359         opcode = MESH_FOUNDATION_OPERATION_SIG_MODEL_APP_LIST;
1360     } else {
1361         opcode = MESH_FOUNDATION_OPERATION_VENDOR_MODEL_APP_LIST;
1362     }
1363     mesh_transport_pdu_t * transport_pdu = mesh_access_transport_init(opcode);
1364     if (!transport_pdu) return;
1365 
1366     mesh_access_transport_add_uint8(transport_pdu, status);
1367     mesh_access_transport_add_uint16(transport_pdu, element_address);
1368     if (mesh_model_is_bluetooth_sig(model_identifier)) {
1369         mesh_access_transport_add_uint16(transport_pdu, mesh_model_get_model_id(model_identifier));
1370     } else {
1371         mesh_access_transport_add_uint32(transport_pdu, model_identifier);
1372     }
1373 
1374     // add list of appkey indexes
1375     if (mesh_model){
1376         uint16_t i;
1377         for (i=0;i<MAX_NR_MESH_APPKEYS_PER_MODEL;i++){
1378             uint16_t appkey_index = mesh_model->appkey_indices[i];
1379             if (appkey_index == MESH_APPKEY_INVALID) continue;
1380             mesh_access_transport_add_uint16(transport_pdu, appkey_index);
1381         }
1382     }
1383 
1384     // send as segmented access pdu
1385     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
1386 }
1387 
1388 static void config_model_app_bind_handler(mesh_model_t *config_server_model, mesh_pdu_t * pdu) {
1389     mesh_access_parser_state_t parser;
1390     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1391 
1392     uint16_t element_address = mesh_access_parser_get_u16(&parser);
1393     uint16_t appkey_index    = mesh_access_parser_get_u16(&parser);
1394     uint32_t model_identifier = mesh_access_parser_get_model_identifier(&parser);
1395 
1396     uint8_t status;
1397     do {
1398         // validate address and look up model
1399         mesh_model_t * target_model = mesh_access_model_for_address_and_model_identifier(element_address, model_identifier, &status);
1400         if (target_model == NULL) break;
1401 
1402         // validate app key exists
1403         mesh_transport_key_t * app_key = mesh_transport_key_get(appkey_index);
1404         if (!app_key){
1405             status = MESH_FOUNDATION_STATUS_INVALID_APPKEY_INDEX;
1406             break;
1407         }
1408 
1409         // Configuration Server only allows device keys
1410         if (mesh_model_is_configuration_server(model_identifier)){
1411             status = MESH_FOUNDATION_STATUS_CANNOT_BIND;
1412             break;
1413         }
1414         status = mesh_model_bind_appkey(target_model, appkey_index);
1415 
1416     } while (0);
1417 
1418     config_model_app_status(config_server_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, element_address, appkey_index, model_identifier);
1419     mesh_access_message_processed(pdu);
1420 }
1421 
1422 static void config_model_app_unbind_handler(mesh_model_t *config_server_model, mesh_pdu_t * pdu) {
1423     mesh_access_parser_state_t parser;
1424     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1425 
1426     uint16_t element_address = mesh_access_parser_get_u16(&parser);
1427     uint16_t appkey_index    = mesh_access_parser_get_u16(&parser);
1428     uint32_t model_identifier = mesh_access_parser_get_model_identifier(&parser);
1429 
1430     uint8_t status;
1431     do {
1432         // validate address and look up model
1433         mesh_model_t * target_model = mesh_access_model_for_address_and_model_identifier(element_address, model_identifier, &status);
1434         if (target_model == NULL) break;
1435 
1436         // validate app key exists
1437         mesh_transport_key_t * app_key = mesh_transport_key_get(appkey_index);
1438         if (!app_key){
1439             status = MESH_FOUNDATION_STATUS_INVALID_APPKEY_INDEX;
1440             break;
1441         }
1442 
1443         // stop publishing
1444         mesh_configuration_server_stop_publishing_using_appkey(target_model, appkey_index);
1445 
1446         // unbind appkey
1447         mesh_model_unbind_appkey(target_model, appkey_index);
1448 
1449         status = MESH_FOUNDATION_STATUS_SUCCESS;
1450     } while (0);
1451 
1452     config_model_app_status(config_server_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, element_address, appkey_index, model_identifier);
1453     mesh_access_message_processed(pdu);
1454 }
1455 
1456 static void config_model_app_get_handler(mesh_model_t *config_server_model, mesh_pdu_t * pdu){
1457     mesh_access_parser_state_t parser;
1458     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1459 
1460     uint16_t element_address = mesh_access_parser_get_u16(&parser);
1461     uint32_t model_identifier = mesh_access_parser_get_model_identifier(&parser);
1462 
1463     uint8_t status;
1464     mesh_model_t * target_model = mesh_access_model_for_address_and_model_identifier(element_address, model_identifier, &status);
1465     config_model_app_list(config_server_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, element_address, model_identifier, target_model);
1466     mesh_access_message_processed(pdu);
1467 }
1468 
1469 // Model Publication
1470 static void config_model_publication_changed(mesh_model_t *mesh_model, mesh_publication_model_t * new_publication_model){
1471 
1472     // stop publication
1473     mesh_model_publication_stop(mesh_model);
1474 
1475     if (new_publication_model->address == MESH_ADDRESS_UNSASSIGNED) {
1476         // "When the PublishAddress is set to the unassigned address, the values of the AppKeyIndex, CredentialFlag, PublishTTL, PublishPeriod, PublishRetransmitCount, and PublishRetransmitIntervalSteps fields shall be set to 0x00.
1477         mesh_model->publication_model->address = MESH_ADDRESS_UNSASSIGNED;
1478         mesh_model->publication_model->appkey_index = 0;
1479         mesh_model->publication_model->friendship_credential_flag = 0;
1480         mesh_model->publication_model->period = 0;
1481         mesh_model->publication_model->ttl = 0;
1482         mesh_model->publication_model->retransmit = 0;
1483     } else {
1484         // update model publication state
1485         mesh_model->publication_model->address = new_publication_model->address;
1486         mesh_model->publication_model->appkey_index = new_publication_model->appkey_index;
1487         mesh_model->publication_model->friendship_credential_flag = new_publication_model->friendship_credential_flag;
1488         mesh_model->publication_model->period = new_publication_model->period;
1489         mesh_model->publication_model->ttl = new_publication_model->ttl;
1490         mesh_model->publication_model->retransmit = new_publication_model->retransmit;
1491     }
1492 
1493     // store
1494     mesh_model_store_publication(mesh_model);
1495 
1496     // start publication if address is set (nothing happens if period = 0 and retransmit = 0)
1497     if (new_publication_model->address == MESH_ADDRESS_UNSASSIGNED) return;
1498 
1499     // start to publish
1500     mesh_model_publication_start(mesh_model);
1501 }
1502 
1503 
1504 static void
1505 config_model_publication_status(mesh_model_t *mesh_model, uint16_t netkey_index, uint16_t dest, uint8_t status,
1506                                     uint16_t element_address, uint32_t model_identifier, mesh_publication_model_t *publication_model) {
1507     UNUSED(mesh_model);
1508 
1509     // setup message
1510     uint16_t app_key_index_and_credential_flag = 0;
1511     uint16_t publish_address = 0;
1512     uint8_t ttl = 0;
1513     uint8_t period = 0;
1514     uint8_t retransmit = 0;
1515     if (status == MESH_FOUNDATION_STATUS_SUCCESS){
1516         app_key_index_and_credential_flag = (publication_model->friendship_credential_flag << 12) | publication_model->appkey_index;
1517         ttl = publication_model->ttl;
1518         period = publication_model->period;
1519         retransmit = publication_model->retransmit;
1520 
1521         publish_address = publication_model->address;
1522         if (mesh_network_address_virtual(publish_address)){
1523             mesh_virtual_address_t * virtual_address = mesh_virtual_address_for_pseudo_dst(publish_address);
1524             if (virtual_address){
1525                 publish_address = virtual_address->hash;
1526             }
1527         }
1528     }
1529 
1530     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(
1531             &mesh_foundation_config_model_publication_status, status, element_address, publish_address,
1532             app_key_index_and_credential_flag, ttl, period, retransmit, model_identifier);
1533     if (!transport_pdu) return;
1534 
1535     // send as segmented access pdu
1536     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
1537 }
1538 
1539 static void
1540 config_model_publication_set_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu) {
1541 
1542     // set defaults
1543     memset(&configuration_server_publication_model, 0, sizeof(mesh_publication_model_t));
1544 
1545     mesh_access_parser_state_t parser;
1546     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1547 
1548     // ElementAddress
1549     uint16_t element_address = mesh_access_parser_get_u16(&parser);
1550 
1551     // PublishAddress, 16 bit
1552     configuration_server_publication_model.address = mesh_access_parser_get_u16(&parser);
1553 
1554     // AppKeyIndex (12), CredentialFlag (1), RFU (3)
1555     uint16_t temp = mesh_access_parser_get_u16(&parser);
1556     configuration_server_publication_model.appkey_index = temp & 0x0fff;
1557     configuration_server_publication_model.friendship_credential_flag = (temp >> 12) & 1;
1558 
1559     // TTL
1560     configuration_server_publication_model.ttl        = mesh_access_parser_get_u8(&parser);
1561 
1562     // Period
1563     configuration_server_publication_model.period     = mesh_access_parser_get_u8(&parser);
1564 
1565     // Retransmit
1566     configuration_server_publication_model.retransmit = mesh_access_parser_get_u8(&parser);
1567 
1568     // Model Identifier
1569     uint32_t model_identifier = mesh_access_parser_get_model_identifier(&parser);
1570 
1571     // Get Model for Element + Model Identifier
1572     uint8_t status;
1573     mesh_model_t * target_model = mesh_access_model_for_address_and_model_identifier(element_address, model_identifier, &status);
1574 
1575     // Check if publicatation model struct provided
1576     if (status == MESH_FOUNDATION_STATUS_SUCCESS) {
1577         if (target_model->publication_model == NULL){
1578             status = MESH_FOUNDATION_STATUS_CANNOT_SET;
1579         }
1580     }
1581 
1582     // Check AppKey
1583     if (status == MESH_FOUNDATION_STATUS_SUCCESS){
1584         // check if appkey already exists
1585         mesh_transport_key_t * app_key = mesh_transport_key_get(configuration_server_publication_model.appkey_index);
1586         if (app_key == NULL) {
1587             status = MESH_FOUNDATION_STATUS_INVALID_APPKEY_INDEX;
1588         }
1589     }
1590 
1591     // Accept set
1592     if (status == MESH_FOUNDATION_STATUS_SUCCESS){
1593         // decrease ref count if old virtual address
1594         if (mesh_network_address_virtual(configuration_server_publication_model.address)) {
1595             mesh_virtual_address_t * current_virtual_address = mesh_virtual_address_for_pseudo_dst(configuration_server_publication_model.address);
1596             mesh_virtual_address_decrease_refcount(current_virtual_address);
1597         }
1598 
1599         // restart publication
1600         config_model_publication_changed(target_model, &configuration_server_publication_model);
1601     }
1602 
1603     // send status
1604     config_model_publication_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, element_address, model_identifier, &configuration_server_publication_model);
1605     mesh_access_message_processed(pdu);
1606 }
1607 
1608 static void config_model_publication_virtual_address_set_hash(void *arg){
1609     mesh_model_t *mesh_model = (mesh_model_t*) arg;
1610 
1611     // add if not exist
1612     mesh_virtual_address_t * virtual_address = mesh_virtual_address_for_label_uuid(configuration_server_label_uuid);
1613     if (virtual_address == NULL){
1614         virtual_address = mesh_virtual_address_register(configuration_server_label_uuid, configuration_server_hash);
1615     }
1616 
1617     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
1618     if (virtual_address == NULL){
1619         status = MESH_FOUNDATION_STATUS_INSUFFICIENT_RESOURCES;
1620     } else {
1621 
1622         // increase ref count if new virtual address
1623         mesh_virtual_address_increase_refcount(virtual_address);
1624 
1625         // decrease ref count if old virtual address
1626         if (mesh_network_address_virtual(configuration_server_publication_model.address)) {
1627             mesh_virtual_address_t * current_virtual_address = mesh_virtual_address_for_pseudo_dst(configuration_server_publication_model.address);
1628             if (current_virtual_address){
1629                 mesh_virtual_address_decrease_refcount(current_virtual_address);
1630             }
1631         }
1632 
1633         configuration_server_publication_model.address = virtual_address->pseudo_dst;
1634         mesh_virtual_address_increase_refcount(virtual_address);
1635 
1636         // restart publication
1637         config_model_publication_changed(configuration_server_target_model, &configuration_server_publication_model);
1638     }
1639 
1640     // send status
1641     config_model_publication_status(mesh_model, mesh_pdu_netkey_index(access_pdu_in_process), mesh_pdu_src(access_pdu_in_process), status, configuration_server_element_address, configuration_server_model_identifier, &configuration_server_publication_model);
1642 
1643     mesh_access_message_processed(access_pdu_in_process);
1644 }
1645 
1646 static void
1647 config_model_publication_virtual_address_set_handler(mesh_model_t *mesh_model,
1648                                                      mesh_pdu_t * pdu) {
1649 
1650     // set defaults
1651     memset(&configuration_server_publication_model, 0, sizeof(mesh_publication_model_t));
1652 
1653     mesh_access_parser_state_t parser;
1654     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1655 
1656     // ElementAddress - Address of the element
1657     configuration_server_element_address = mesh_access_parser_get_u16(&parser);
1658 
1659     // store label uuid
1660     mesh_access_parser_get_label_uuid(&parser, configuration_server_label_uuid);
1661 
1662     // AppKeyIndex (12), CredentialFlag (1), RFU (3)
1663     uint16_t temp = mesh_access_parser_get_u16(&parser);
1664     configuration_server_publication_model.appkey_index = temp & 0x0fff;
1665     configuration_server_publication_model.friendship_credential_flag = (temp >> 12) & 1;
1666     configuration_server_publication_model.ttl        = mesh_access_parser_get_u8(&parser);
1667     configuration_server_publication_model.period     = mesh_access_parser_get_u8(&parser);
1668     configuration_server_publication_model.retransmit = mesh_access_parser_get_u8(&parser);
1669 
1670     // Model Identifier
1671     configuration_server_model_identifier = mesh_access_parser_get_model_identifier(&parser);
1672 
1673     // Get Model for Element + Model Identifier
1674     uint8_t status;
1675     configuration_server_target_model = mesh_access_model_for_address_and_model_identifier(configuration_server_element_address, configuration_server_model_identifier, &status);
1676 
1677      // Check if publicatation model struct provided
1678      if (status == MESH_FOUNDATION_STATUS_SUCCESS) {
1679         if (configuration_server_target_model->publication_model == NULL){
1680             status = MESH_FOUNDATION_STATUS_CANNOT_SET;
1681         }
1682      }
1683 
1684      // Check AppKey
1685      if (status == MESH_FOUNDATION_STATUS_SUCCESS){
1686          // check if appkey already exists
1687          mesh_transport_key_t * app_key = mesh_transport_key_get(configuration_server_publication_model.appkey_index);
1688          if (app_key == NULL) {
1689              status = MESH_FOUNDATION_STATUS_INVALID_APPKEY_INDEX;
1690          }
1691      }
1692 
1693     // on error, no need to calculate virtual address hash
1694     if (status != MESH_FOUNDATION_STATUS_SUCCESS){
1695         config_model_publication_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, configuration_server_element_address, configuration_server_model_identifier, &configuration_server_publication_model);
1696         mesh_access_message_processed(pdu);
1697         return;
1698     }
1699 
1700     access_pdu_in_process = pdu;
1701     mesh_virtual_address(&configuration_server_cmac_request, configuration_server_label_uuid, &configuration_server_hash, &config_model_publication_virtual_address_set_hash, mesh_model);
1702 }
1703 
1704 static void
1705 config_model_publication_get_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu) {
1706 
1707 
1708     mesh_access_parser_state_t parser;
1709     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1710 
1711     // ElementAddress - Address of the element - should be us
1712     uint16_t element_address = mesh_access_parser_get_u16(&parser);
1713 
1714     // Model Identifier
1715     uint32_t model_identifier = mesh_access_parser_get_model_identifier(&parser);
1716 
1717     // Get Model for Element + Model Identifier
1718     uint8_t status;
1719     mesh_model_t * target_model = mesh_access_model_for_address_and_model_identifier(element_address, model_identifier, &status);
1720 
1721     mesh_publication_model_t * publication_model;
1722     if (target_model == NULL){
1723         // use defaults
1724         memset(&configuration_server_publication_model, 0, sizeof(mesh_publication_model_t));
1725         publication_model = &configuration_server_publication_model;
1726     } else {
1727         publication_model = target_model->publication_model;
1728     }
1729 
1730     config_model_publication_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, element_address, model_identifier, publication_model);
1731     mesh_access_message_processed(pdu);
1732 }
1733 
1734 // Heartbeat Publication
1735 
1736 static void config_heartbeat_publication_emit(mesh_heartbeat_publication_t * mesh_heartbeat_publication){
1737 
1738     printf("CONFIG_SERVER_HEARTBEAT: Emit (dest %04x, count %u, period %u ms)\n",
1739         mesh_heartbeat_publication->destination,
1740         mesh_heartbeat_publication->count,
1741         mesh_heartbeat_publication->period_ms);
1742 
1743     // active features
1744     mesh_heartbeat_publication->active_features = mesh_foundation_get_features();
1745 
1746     mesh_network_pdu_t * network_pdu = mesh_network_pdu_get();
1747     if (network_pdu){
1748         uint8_t data[3];
1749         data[0] = mesh_heartbeat_publication->ttl;
1750         big_endian_store_16(data, 1, mesh_heartbeat_publication->active_features);
1751         uint8_t status = mesh_upper_transport_setup_control_pdu((mesh_pdu_t *) network_pdu, mesh_heartbeat_publication->netkey_index,
1752                 mesh_heartbeat_publication->ttl, mesh_node_get_primary_element_address(), mesh_heartbeat_publication->destination,
1753                 MESH_TRANSPORT_OPCODE_HEARTBEAT, data, sizeof(data));
1754         if (status){
1755             // stop periodic emit on error (netkey got invalid)
1756             mesh_heartbeat_publication->period_ms = 0;
1757             mesh_network_pdu_free(network_pdu);
1758         } else {
1759             mesh_upper_transport_send_control_pdu((mesh_pdu_t *) network_pdu);
1760         }
1761     }
1762 
1763     // forever
1764     if (mesh_heartbeat_publication->count > 0 && mesh_heartbeat_publication->count < 0xffffu) {
1765         mesh_heartbeat_publication->count--;
1766     }
1767 }
1768 void mesh_configuration_server_feature_changed(void){
1769     mesh_model_t * mesh_model = mesh_model_get_configuration_server();
1770     mesh_heartbeat_publication_t * mesh_heartbeat_publication = &((mesh_configuration_server_model_context_t*) mesh_model->model_data)->heartbeat_publication;
1771 
1772     // filter features by observed features for heartbeats
1773     uint16_t current_features  = mesh_foundation_get_features()              & mesh_heartbeat_publication->features;
1774     uint16_t previous_features = mesh_heartbeat_publication->active_features & mesh_heartbeat_publication->features;
1775 
1776     // changes?
1777     if (current_features == previous_features) return;
1778 
1779     config_heartbeat_publication_emit(mesh_heartbeat_publication);
1780 }
1781 
1782 static void config_heartbeat_publication_timeout_handler(btstack_timer_source_t * ts){
1783 
1784     mesh_heartbeat_publication_t * mesh_heartbeat_publication = (mesh_heartbeat_publication_t*) ts;
1785     mesh_heartbeat_publication->timer_active = 0;
1786 
1787     // emit beat
1788     config_heartbeat_publication_emit(mesh_heartbeat_publication);
1789 
1790     // all sent?
1791     if (mesh_heartbeat_publication->count == 0) return;
1792 
1793     // periodic publication?
1794     if (mesh_heartbeat_publication->period_ms == 0) return;
1795 
1796     btstack_run_loop_set_timer(ts, mesh_heartbeat_publication->period_ms);
1797     btstack_run_loop_add_timer(ts);
1798     mesh_heartbeat_publication->timer_active = 1;
1799 }
1800 
1801 static void config_heartbeat_publication_status(mesh_model_t *mesh_model, uint16_t netkey_index, uint16_t dest, uint8_t status, mesh_heartbeat_publication_t * mesh_heartbeat_publication){
1802     UNUSED(mesh_model);
1803 
1804     // setup message
1805     uint8_t count_log = heartbeat_count_log(mesh_heartbeat_publication->count);
1806     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(
1807             &mesh_foundation_config_heartbeat_publication_status,
1808             status,
1809             mesh_heartbeat_publication->destination,
1810             count_log,
1811             mesh_heartbeat_publication->period_log,
1812             mesh_heartbeat_publication->ttl,
1813             mesh_heartbeat_publication->features,
1814             mesh_heartbeat_publication->netkey_index);
1815     if (!transport_pdu) return;
1816 
1817     printf("MESH config_heartbeat_publication_status count = %u => count_log = %u\n", mesh_heartbeat_publication->count, count_log);
1818 
1819     // send as segmented access pdu
1820     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
1821 }
1822 
1823 static void config_heartbeat_publication_set_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu) {
1824 
1825     mesh_heartbeat_publication_t requested_publication;
1826     memset(&requested_publication, 0, sizeof(requested_publication));
1827 
1828     mesh_access_parser_state_t parser;
1829     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1830 
1831     // Destination address for Heartbeat messages
1832     requested_publication.destination = mesh_access_parser_get_u16(&parser);
1833     // Number of Heartbeat messages to be sent
1834     requested_publication.count = heartbeat_pwr2(mesh_access_parser_get_u8(&parser));
1835     //  Period for sending Heartbeat messages
1836     requested_publication.period_log = mesh_access_parser_get_u8(&parser);
1837     //  TTL to be used when sending Heartbeat messages
1838     requested_publication.ttl = mesh_access_parser_get_u8(&parser);
1839     // Bit field indicating features that trigger Heartbeat messages when changed
1840     requested_publication.features = mesh_access_parser_get_u16(&parser) & MESH_HEARTBEAT_FEATURES_SUPPORTED_MASK;
1841     // NetKey Index
1842     requested_publication.netkey_index = mesh_access_parser_get_u16(&parser);
1843 
1844     // store period as ms
1845     requested_publication.period_ms = heartbeat_pwr2(requested_publication.period_log) * 1000;
1846 
1847     // store current features
1848     requested_publication.active_features = mesh_foundation_get_features();
1849 
1850     mesh_heartbeat_publication_t * mesh_heartbeat_publication = &((mesh_configuration_server_model_context_t*) mesh_model->model_data)->heartbeat_publication;
1851 
1852     // validate fields
1853     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
1854     mesh_network_key_t * network_key = mesh_network_key_list_get(requested_publication.netkey_index);
1855     if (network_key == NULL){
1856         status = MESH_FOUNDATION_STATUS_INVALID_NETKEY_INDEX;
1857     } else {
1858         printf("MESH config_heartbeat_publication_set, destination %x, count = %x, period = %u s\n",
1859             requested_publication.destination, requested_publication.count, requested_publication.period_ms);
1860 
1861         // stop timer if active
1862         // note: accept update below using memcpy overwwrite timer_active flag
1863         if (mesh_heartbeat_publication->timer_active){
1864             btstack_run_loop_remove_timer(&mesh_heartbeat_publication->timer);
1865             mesh_heartbeat_publication->timer_active = 0;
1866         }
1867 
1868         // accept update
1869         memcpy(mesh_heartbeat_publication, &requested_publication, sizeof(mesh_heartbeat_publication_t));
1870     }
1871 
1872     config_heartbeat_publication_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, mesh_heartbeat_publication);
1873 
1874     mesh_access_message_processed(pdu);
1875 
1876     if (status != MESH_FOUNDATION_STATUS_SUCCESS) return;
1877 
1878     // check if heartbeats should be disabled
1879     if (mesh_heartbeat_publication->destination == MESH_ADDRESS_UNSASSIGNED || mesh_heartbeat_publication->period_log == 0) {
1880         return;
1881     }
1882 
1883     // initial heartbeat after 2000 ms
1884     btstack_run_loop_set_timer_handler(&mesh_heartbeat_publication->timer, config_heartbeat_publication_timeout_handler);
1885     btstack_run_loop_set_timer_context(&mesh_heartbeat_publication->timer, mesh_heartbeat_publication);
1886     btstack_run_loop_set_timer(&mesh_heartbeat_publication->timer, 2000);
1887     btstack_run_loop_add_timer(&mesh_heartbeat_publication->timer);
1888     mesh_heartbeat_publication->timer_active = 1;
1889 }
1890 
1891 static void config_heartbeat_publication_get_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu) {
1892     mesh_heartbeat_publication_t * mesh_heartbeat_publication = &((mesh_configuration_server_model_context_t*) mesh_model->model_data)->heartbeat_publication;
1893     config_heartbeat_publication_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), MESH_FOUNDATION_STATUS_SUCCESS, mesh_heartbeat_publication);
1894     mesh_access_message_processed(pdu);
1895 }
1896 
1897 // Heartbeat Subscription
1898 
1899 static void config_heartbeat_subscription_status(mesh_model_t *mesh_model, uint16_t netkey_index, uint16_t dest, uint8_t status, mesh_heartbeat_subscription_t * mesh_heartbeat_subscription){
1900     UNUSED(mesh_model);
1901 
1902     // setup message
1903     uint8_t count_log = heartbeat_count_log(mesh_heartbeat_subscription->count);
1904     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(
1905             &mesh_foundation_config_heartbeat_subscription_status,
1906             status,
1907             mesh_heartbeat_subscription->source,
1908             mesh_heartbeat_subscription->destination,
1909             mesh_heartbeat_subscription->period_log,
1910             count_log,
1911             mesh_heartbeat_subscription->min_hops,
1912             mesh_heartbeat_subscription->max_hops);
1913     if (!transport_pdu) return;
1914     printf("MESH config_heartbeat_subscription_status count = %u => count_log = %u\n", mesh_heartbeat_subscription->count, count_log);
1915 
1916     // send as segmented access pdu
1917     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
1918 }
1919 static int config_heartbeat_subscription_enabled(mesh_heartbeat_subscription_t * mesh_heartbeat_subscription){
1920     return mesh_network_address_unicast(mesh_heartbeat_subscription->source) && mesh_heartbeat_subscription->period_log > 0 &&
1921         (mesh_network_address_unicast(mesh_heartbeat_subscription->destination) || mesh_network_address_group(mesh_heartbeat_subscription->destination));
1922 }
1923 
1924 static void config_heartbeat_subscription_set_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu) {
1925     mesh_access_parser_state_t parser;
1926     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
1927 
1928     mesh_heartbeat_subscription_t requested_subscription;
1929 
1930     // Destination address for Heartbeat messages
1931     requested_subscription.source = mesh_access_parser_get_u16(&parser);
1932     // Destination address for Heartbeat messages
1933     requested_subscription.destination = mesh_access_parser_get_u16(&parser);
1934     //  Period for sending Heartbeat messages
1935     requested_subscription.period_log = mesh_access_parser_get_u8(&parser);
1936 
1937 
1938     // Hearbeat Subscription Soure must be unassigned or a unicast address
1939     int source_address_valid =
1940          (requested_subscription.source == MESH_ADDRESS_UNSASSIGNED)    ||
1941          (mesh_network_address_unicast(requested_subscription.source));
1942 
1943     // Heartbeat Subscription Destination must be unassigned, unicast (== our primary address), or a group address)
1944     int destination_address_valid =
1945          (requested_subscription.destination == MESH_ADDRESS_UNSASSIGNED)  ||
1946          (mesh_network_address_unicast(requested_subscription.destination) && requested_subscription.destination == mesh_node_get_primary_element_address()) ||
1947          (mesh_network_address_group(requested_subscription.destination));
1948 
1949     if (!source_address_valid || !destination_address_valid){
1950         printf("MESH config_heartbeat_subscription_set, source %x or destination %x invalid\n", requested_subscription.source, requested_subscription.destination);
1951         mesh_access_message_processed(pdu);
1952         return;
1953     }
1954 
1955     int subscription_enabled = config_heartbeat_subscription_enabled(&requested_subscription);
1956     printf("MESH config_heartbeat_subscription_set, source %x destination %x, period = %u s => enabled %u \n", requested_subscription.source,
1957             requested_subscription.destination, heartbeat_pwr2(requested_subscription.period_log), subscription_enabled);
1958 
1959     // ignore messages
1960     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
1961     if (requested_subscription.period_log > 0x11u){
1962         status = MESH_FOUNDATION_STATUS_CANNOT_SET;
1963     } else if ((requested_subscription.destination != MESH_ADDRESS_UNSASSIGNED)  &&
1964                !mesh_network_address_unicast(requested_subscription.destination) &&
1965                !mesh_network_address_group(requested_subscription.destination)){
1966         status = MESH_FOUNDATION_STATUS_INVALID_ADDRESS;
1967     }
1968 
1969     if (status != MESH_FOUNDATION_STATUS_SUCCESS){
1970         config_heartbeat_subscription_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, &requested_subscription);
1971         mesh_access_message_processed(pdu);
1972         return;
1973     }
1974 
1975     mesh_heartbeat_subscription_t * mesh_heartbeat_subscription = &((mesh_configuration_server_model_context_t*) mesh_model->model_data)->heartbeat_subscription;
1976 
1977     if (config_heartbeat_subscription_enabled(&requested_subscription)){
1978         mesh_heartbeat_subscription->source          = requested_subscription.source;
1979         mesh_heartbeat_subscription->destination     = requested_subscription.destination;
1980         mesh_heartbeat_subscription->period_log      = requested_subscription.period_log;
1981         mesh_heartbeat_subscription->count           = 0;
1982         mesh_heartbeat_subscription->min_hops        = 0x7Fu;
1983         mesh_heartbeat_subscription->max_hops        = 0u;
1984         mesh_heartbeat_subscription->period_start_ms = btstack_run_loop_get_time_ms();
1985     } else {
1986 #if 0
1987         // code according to Mesh Spec v1.0.1
1988         // "When an element receives a Config Heartbeat Subscription Set message, it shall ... respond with a Config Heartbeat Subscription Status message, setting ...
1989         //  If the Source or the Destination field is set to the unassigned address, or the PeriodLog field is set to 0x00, [then]
1990         //  - the processing of received Heartbeat messages shall be disabled,
1991         //  - the Heartbeat Subscription Source state shall be set to the unassigned address,
1992         //  - the Heartbeat Subscription Destination state shall be set to the unassigned address,
1993         //  - the Heartbeat Subscription MinHops state shall be unchanged,
1994         //  - the Heartbeat Subscription MaxHops state shall be unchanged,
1995         //  - and the Heartbeat Subscription Count state shall be unchanged."
1996         // If period_log == 0, then set src + dest to unassigned. If src or dest are unsigned, get triggers status mit count_log == 0
1997         mesh_heartbeat_subscription->source          = MESH_ADDRESS_UNSASSIGNED;
1998         mesh_heartbeat_subscription->destination     = MESH_ADDRESS_UNSASSIGNED;
1999 #else
2000         // code to satisfy MESH/NODE/CFG/HBS/BV-02-C from PTS 7.4.1 / Mesh TS 1.0.2
2001         if (requested_subscription.source == MESH_ADDRESS_UNSASSIGNED || requested_subscription.destination == MESH_ADDRESS_UNSASSIGNED){
2002             mesh_heartbeat_subscription->source          = MESH_ADDRESS_UNSASSIGNED;
2003             mesh_heartbeat_subscription->destination     = MESH_ADDRESS_UNSASSIGNED;
2004         }
2005 #endif
2006         mesh_heartbeat_subscription->period_log      = 0u;
2007     }
2008 
2009     config_heartbeat_subscription_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, mesh_heartbeat_subscription);
2010     mesh_access_message_processed(pdu);
2011 }
2012 
2013 static uint32_t config_heartbeat_subscription_get_period_remaining_s(mesh_heartbeat_subscription_t * heartbeat_subscription){
2014     // calculate period_log
2015     int32_t time_since_start_s = btstack_time_delta(btstack_run_loop_get_time_ms(), heartbeat_subscription->period_start_ms) / 1000;
2016     int32_t period_s = heartbeat_pwr2(heartbeat_subscription->period_log);
2017     uint32_t period_remaining_s = 0;
2018     if (time_since_start_s < period_s){
2019         period_remaining_s = period_s - time_since_start_s;
2020     }
2021     printf("Heartbeat: time since start %d s, period %u s, period remaining %u s\n", time_since_start_s, period_s, period_remaining_s);
2022     return period_remaining_s;
2023 }
2024 
2025 static void config_heartbeat_subscription_get_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu) {
2026     mesh_heartbeat_subscription_t * mesh_heartbeat_subscription = &((mesh_configuration_server_model_context_t*) mesh_model->model_data)->heartbeat_subscription;
2027     mesh_heartbeat_subscription_t subscription;
2028     memcpy(&subscription, mesh_heartbeat_subscription, sizeof(subscription));
2029     if (mesh_heartbeat_subscription->source == MESH_ADDRESS_UNSASSIGNED || mesh_heartbeat_subscription->destination == MESH_ADDRESS_UNSASSIGNED){
2030         memset(&subscription, 0, sizeof(subscription));
2031     } else {
2032         // calculate period_log
2033         uint32_t period_remaining_s = config_heartbeat_subscription_get_period_remaining_s(&subscription);
2034         subscription.period_log = heartbeat_period_log(period_remaining_s);
2035     }
2036     config_heartbeat_subscription_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), MESH_FOUNDATION_STATUS_SUCCESS, &subscription);
2037     mesh_access_message_processed(pdu);
2038 }
2039 
2040 // KeyRefresh Phase
2041 
2042 static void config_key_refresh_phase_status(mesh_model_t *mesh_model, uint16_t netkey_index_dest, uint16_t dest, uint8_t status, uint16_t netkey_index,
2043     mesh_key_refresh_state_t key_refresh_state){
2044     UNUSED(mesh_model);
2045 
2046     // setup message
2047     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(
2048         &mesh_key_refresh_phase_status,
2049         status,
2050         netkey_index,
2051         key_refresh_state);
2052     if (!transport_pdu) return;
2053 
2054     // send as segmented access pdu
2055     config_server_send_message(netkey_index_dest, dest, (mesh_pdu_t *) transport_pdu);
2056 }
2057 
2058 static void config_key_refresh_phase_get_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
2059     mesh_access_parser_state_t parser;
2060     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
2061     uint16_t netkey_index = mesh_access_parser_get_u16(&parser);
2062     mesh_subnet_t * subnet = mesh_subnet_get_by_netkey_index(netkey_index);
2063 
2064     uint8_t status = MESH_FOUNDATION_STATUS_INVALID_NETKEY_INDEX;
2065     mesh_key_refresh_state_t key_refresh_state = MESH_KEY_REFRESH_NOT_ACTIVE;
2066 
2067     if (subnet != NULL){
2068         status = MESH_FOUNDATION_STATUS_SUCCESS;
2069         key_refresh_state = subnet->key_refresh;
2070     }
2071 
2072     config_key_refresh_phase_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, netkey_index, key_refresh_state);
2073     mesh_access_message_processed(pdu);
2074 }
2075 
2076 static void config_key_refresh_phase_set_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
2077     mesh_access_parser_state_t parser;
2078     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
2079     uint16_t netkey_index = mesh_access_parser_get_u16(&parser);
2080     uint8_t  key_refresh_phase_transition = mesh_access_parser_get_u8(&parser);
2081     mesh_subnet_t * subnet = mesh_subnet_get_by_netkey_index(netkey_index);
2082 
2083     uint8_t status = MESH_FOUNDATION_STATUS_INVALID_NETKEY_INDEX;
2084 
2085     if (subnet != NULL){
2086         status = MESH_FOUNDATION_STATUS_SUCCESS;
2087 
2088         switch (key_refresh_phase_transition){
2089             case 0x02:
2090                 switch (subnet->key_refresh){
2091                     case MESH_KEY_REFRESH_FIRST_PHASE:
2092                     case MESH_KEY_REFRESH_SECOND_PHASE:
2093                         subnet->key_refresh = MESH_KEY_REFRESH_SECOND_PHASE;
2094                         break;
2095                     default:
2096                         break;
2097                 }
2098                 break;
2099             case 0x03:
2100                 switch (subnet->key_refresh){
2101                     case MESH_KEY_REFRESH_FIRST_PHASE:
2102                     case MESH_KEY_REFRESH_SECOND_PHASE:
2103                         // key refresh phase 3 entered
2104                         mesh_access_key_refresh_revoke_keys(subnet);
2105                         subnet->key_refresh = MESH_KEY_REFRESH_NOT_ACTIVE;
2106                         break;
2107                     default:
2108                         break;
2109                 }
2110                 break;
2111             default:
2112                 status = MESH_FOUNDATION_STATUS_CANNOT_SET;
2113                 break;
2114         }
2115     }
2116 
2117     config_key_refresh_phase_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, netkey_index, subnet->key_refresh);
2118     mesh_access_message_processed(pdu);
2119 }
2120 
2121 
2122 static void config_node_reset_status(mesh_model_t *mesh_model, uint16_t netkey_index, uint16_t dest){
2123     UNUSED(mesh_model);
2124 
2125     // setup message
2126     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(&mesh_foundation_node_reset_status);
2127     if (!transport_pdu) return;
2128 
2129     // send as segmented access pdu
2130     config_server_send_message(netkey_index, dest, (mesh_pdu_t *) transport_pdu);
2131 }
2132 
2133 static void config_node_reset_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
2134     mesh_node_reset();
2135     config_node_reset_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu));
2136     mesh_access_message_processed(pdu);
2137 }
2138 
2139 static void low_power_node_poll_timeout_status(mesh_model_t *mesh_model, uint16_t netkey_index_dest, uint16_t dest, uint8_t status){
2140     UNUSED(mesh_model);
2141 
2142     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(
2143         &mesh_foundation_low_power_node_poll_timeout_status,
2144         status,
2145         0,  // The unicast address of the Low Power node
2146         0); // The current value of the PollTimeout timer of the Low Power node
2147     if (!transport_pdu) return;
2148     printf("TODO: send unicast address of the Low Power node and the current value of the PollTimeout timer, instead of 0s\n");
2149     // send as segmented access pdu
2150     config_server_send_message(netkey_index_dest, dest, (mesh_pdu_t *) transport_pdu);
2151 }
2152 
2153 static void config_low_power_node_poll_timeout_get_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
2154     mesh_access_parser_state_t parser;
2155     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
2156     printf("TODO: implement get the current value of PollTimeout timer of the Low Power node within a Friend node\n");
2157     low_power_node_poll_timeout_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), MESH_FOUNDATION_STATUS_SUCCESS);
2158 
2159     mesh_access_message_processed(pdu);
2160 }
2161 
2162 static void config_node_identity_status(mesh_model_t *mesh_model, uint16_t netkey_index_dest, uint16_t dest, uint8_t status, uint16_t netkey_index,
2163     mesh_node_identity_state_t node_identity_state){
2164     UNUSED(mesh_model);
2165 
2166     // setup message
2167     mesh_transport_pdu_t * transport_pdu = mesh_access_setup_segmented_message(
2168         &mesh_foundation_node_identity_status,
2169         status,
2170         netkey_index,
2171         node_identity_state);
2172     if (!transport_pdu) return;
2173 
2174     // send as segmented access pdu
2175     config_server_send_message(netkey_index_dest, dest, (mesh_pdu_t *) transport_pdu);
2176 }
2177 
2178 static void config_node_identity_get_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
2179     mesh_access_parser_state_t parser;
2180     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
2181     uint16_t netkey_index = mesh_access_parser_get_u16(&parser);
2182 
2183     mesh_node_identity_state_t node_identity_state = MESH_NODE_IDENTITY_STATE_ADVERTISING_NOT_SUPPORTED;
2184     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
2185 #ifdef ENABLE_MESH_PROXY_SERVER
2186     status = mesh_proxy_get_advertising_with_node_id_status(netkey_index, &node_identity_state);
2187 #endif
2188     config_node_identity_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, netkey_index, node_identity_state);
2189 
2190     mesh_access_message_processed(pdu);
2191 }
2192 
2193 static void config_node_identity_set_handler(mesh_model_t *mesh_model, mesh_pdu_t * pdu){
2194     mesh_access_parser_state_t parser;
2195     mesh_access_parser_init(&parser, (mesh_pdu_t*) pdu);
2196     uint16_t netkey_index = mesh_access_parser_get_u16(&parser);
2197     mesh_node_identity_state_t node_identity_state = (mesh_node_identity_state_t) mesh_access_parser_get_u8(&parser);
2198 
2199     // ignore invalid state
2200     if (node_identity_state >= MESH_NODE_IDENTITY_STATE_ADVERTISING_NOT_SUPPORTED) {
2201         mesh_access_message_processed(pdu);
2202         return;
2203     }
2204 
2205     uint8_t status = MESH_FOUNDATION_STATUS_SUCCESS;
2206 #ifdef ENABLE_MESH_PROXY_SERVER
2207     status = mesh_proxy_set_advertising_with_node_id(netkey_index, node_identity_state);
2208 #else
2209     mesh_subnet_t * network_key = mesh_subnet_get_by_netkey_index(netkey_index);
2210     if (network_key == NULL){
2211         status = MESH_FOUNDATION_STATUS_INVALID_NETKEY_INDEX;
2212     }
2213 #endif
2214 
2215     config_node_identity_status(mesh_model, mesh_pdu_netkey_index(pdu), mesh_pdu_src(pdu), status, netkey_index, node_identity_state);
2216 
2217     mesh_access_message_processed(pdu);
2218 }
2219 
2220 //
2221 
2222 const static mesh_operation_t mesh_configuration_server_model_operations[] = {
2223     { MESH_FOUNDATION_OPERATION_APPKEY_ADD,                                  19, config_appkey_add_handler },
2224     { MESH_FOUNDATION_OPERATION_APPKEY_DELETE,                                3, config_appkey_delete_handler },
2225     { MESH_FOUNDATION_OPERATION_APPKEY_GET,                                   2, config_appkey_get_handler },
2226     { MESH_FOUNDATION_OPERATION_APPKEY_UPDATE,                               19, config_appkey_update_handler },
2227     { MESH_FOUNDATION_OPERATION_NETKEY_ADD,                                  18, config_netkey_add_handler },
2228     { MESH_FOUNDATION_OPERATION_NETKEY_UPDATE,                               18, config_netkey_update_handler },
2229     { MESH_FOUNDATION_OPERATION_NETKEY_DELETE,                                2, config_netkey_delete_handler },
2230     { MESH_FOUNDATION_OPERATION_NETKEY_GET,                                   0, config_netkey_get_handler },
2231     { MESH_FOUNDATION_OPERATION_COMPOSITION_DATA_GET,                         1, config_composition_data_get_handler },
2232     { MESH_FOUNDATION_OPERATION_BEACON_GET,                                   0, config_beacon_get_handler },
2233     { MESH_FOUNDATION_OPERATION_BEACON_SET,                                   1, config_beacon_set_handler },
2234     { MESH_FOUNDATION_OPERATION_DEFAULT_TTL_GET,                              0, config_default_ttl_get_handler },
2235     { MESH_FOUNDATION_OPERATION_DEFAULT_TTL_SET,                              1, config_default_ttl_set_handler },
2236     { MESH_FOUNDATION_OPERATION_FRIEND_GET,                                   0, config_friend_get_handler },
2237     { MESH_FOUNDATION_OPERATION_FRIEND_SET,                                   1, config_friend_set_handler },
2238     { MESH_FOUNDATION_OPERATION_NETWORK_TRANSMIT_GET,                         0, config_model_network_transmit_get_handler },
2239     { MESH_FOUNDATION_OPERATION_NETWORK_TRANSMIT_SET,                         1, config_model_network_transmit_set_handler },
2240     { MESH_FOUNDATION_OPERATION_GATT_PROXY_GET,                               0, config_gatt_proxy_get_handler },
2241     { MESH_FOUNDATION_OPERATION_GATT_PROXY_SET,                               1, config_gatt_proxy_set_handler },
2242     { MESH_FOUNDATION_OPERATION_RELAY_GET,                                    0, config_relay_get_handler },
2243     { MESH_FOUNDATION_OPERATION_RELAY_SET,                                    1, config_relay_set_handler },
2244     { MESH_FOUNDATION_OPERATION_MODEL_SUBSCRIPTION_ADD,                       6, config_model_subscription_add_handler },
2245     { MESH_FOUNDATION_OPERATION_MODEL_SUBSCRIPTION_VIRTUAL_ADDRESS_ADD,      20, config_model_subscription_virtual_address_add_handler },
2246     { MESH_FOUNDATION_OPERATION_MODEL_SUBSCRIPTION_DELETE,                    6, config_model_subscription_delete_handler },
2247     { MESH_FOUNDATION_OPERATION_MODEL_SUBSCRIPTION_VIRTUAL_ADDRESS_DELETE,   20, config_model_subscription_virtual_address_delete_handler },
2248     { MESH_FOUNDATION_OPERATION_MODEL_SUBSCRIPTION_OVERWRITE,                 6, config_model_subscription_overwrite_handler },
2249     { MESH_FOUNDATION_OPERATION_MODEL_SUBSCRIPTION_VIRTUAL_ADDRESS_OVERWRITE,20, config_model_subscription_virtual_address_overwrite_handler },
2250     { MESH_FOUNDATION_OPERATION_MODEL_SUBSCRIPTION_DELETE_ALL,                4, config_model_subscription_delete_all_handler },
2251     { MESH_FOUNDATION_OPERATION_SIG_MODEL_SUBSCRIPTION_GET,                   4, config_model_subscription_get_handler },
2252     { MESH_FOUNDATION_OPERATION_VENDOR_MODEL_SUBSCRIPTION_GET,                6, config_model_subscription_get_handler },
2253     { MESH_FOUNDATION_OPERATION_SIG_MODEL_APP_GET,                            4, config_model_app_get_handler },
2254     { MESH_FOUNDATION_OPERATION_VENDOR_MODEL_APP_GET,                         6, config_model_app_get_handler },
2255     { MESH_FOUNDATION_OPERATION_MODEL_PUBLICATION_SET,                       11, config_model_publication_set_handler },
2256     { MESH_FOUNDATION_OPERATION_MODEL_PUBLICATION_VIRTUAL_ADDRESS_SET,       25, config_model_publication_virtual_address_set_handler },
2257     { MESH_FOUNDATION_OPERATION_MODEL_PUBLICATION_GET,                        4, config_model_publication_get_handler },
2258     { MESH_FOUNDATION_OPERATION_MODEL_APP_BIND,                               6, config_model_app_bind_handler },
2259     { MESH_FOUNDATION_OPERATION_MODEL_APP_UNBIND,                             6, config_model_app_unbind_handler },
2260     { MESH_FOUNDATION_OPERATION_HEARTBEAT_PUBLICATION_GET,                    0, config_heartbeat_publication_get_handler },
2261     { MESH_FOUNDATION_OPERATION_HEARTBEAT_PUBLICATION_SET,                    9, config_heartbeat_publication_set_handler },
2262     { MESH_FOUNDATION_OPERATION_HEARTBEAT_SUBSCRIPTION_GET,                   0, config_heartbeat_subscription_get_handler},
2263     { MESH_FOUNDATION_OPERATION_HEARTBEAT_SUBSCRIPTION_SET,                   5, config_heartbeat_subscription_set_handler},
2264     { MESH_FOUNDATION_OPERATION_KEY_REFRESH_PHASE_GET,                        2, config_key_refresh_phase_get_handler },
2265     { MESH_FOUNDATION_OPERATION_KEY_REFRESH_PHASE_SET,                        3, config_key_refresh_phase_set_handler },
2266     { MESH_FOUNDATION_OPERATION_NODE_RESET,                                   0, config_node_reset_handler },
2267     { MESH_FOUNDATION_OPERATION_LOW_POWER_NODE_POLL_TIMEOUT_GET,              2, config_low_power_node_poll_timeout_get_handler },
2268     { MESH_FOUNDATION_OPERATION_NODE_IDENTITY_GET,                            2, config_node_identity_get_handler },
2269     { MESH_FOUNDATION_OPERATION_NODE_IDENTITY_SET,                            3, config_node_identity_set_handler },
2270     { 0, 0, NULL }
2271 };
2272 
2273 const mesh_operation_t * mesh_configuration_server_get_operations(void){
2274     return mesh_configuration_server_model_operations;
2275 }
2276 
2277 void mesh_configuration_server_process_heartbeat(mesh_model_t * configuration_server_model, uint16_t src, uint16_t dest, uint8_t hops, uint16_t features){
2278     UNUSED(features);
2279     mesh_heartbeat_subscription_t * mesh_heartbeat_subscription = &((mesh_configuration_server_model_context_t*) configuration_server_model->model_data)->heartbeat_subscription;
2280     if (config_heartbeat_subscription_get_period_remaining_s(mesh_heartbeat_subscription) == 0) return;
2281     if (mesh_heartbeat_subscription->source != src) return;
2282     if (mesh_heartbeat_subscription->destination != dest) return;
2283     // update count
2284     if (mesh_heartbeat_subscription->count != 0xffff){
2285         mesh_heartbeat_subscription->count++;
2286     }
2287     // update min/max hops
2288     mesh_heartbeat_subscription->min_hops = (uint8_t) btstack_min(mesh_heartbeat_subscription->min_hops, hops);
2289     mesh_heartbeat_subscription->max_hops = (uint8_t) btstack_max(mesh_heartbeat_subscription->max_hops, hops);
2290 
2291     printf("HEARTBEAT, count %u, min %u, max %u hops\n", mesh_heartbeat_subscription->count, mesh_heartbeat_subscription->min_hops, mesh_heartbeat_subscription->max_hops);
2292 }
2293