1 /*
2 * Copyright (C) 2021 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 BLUEKITCHEN
24 * GMBH 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__ "scan_parameters_service_client.c"
39
40 #include "btstack_config.h"
41
42 #include <stdint.h>
43 #include <string.h>
44
45 #ifdef ENABLE_TESTING_SUPPORT
46 #include <stdio.h>
47 #endif
48
49 #include "scan_parameters_service_client.h"
50
51 #include "btstack_memory.h"
52 #include "ble/core.h"
53 #include "ble/gatt_client.h"
54 #include "bluetooth_gatt.h"
55 #include "btstack_debug.h"
56 #include "btstack_event.h"
57 #include "btstack_run_loop.h"
58 #include "gap.h"
59
60 #include "ble/gatt_service_client.h"
61
62 static btstack_packet_callback_registration_t hci_event_callback_registration;
63
64 static btstack_linked_list_t clients;
65 static uint16_t scan_parameters_service_cid_counter = 0;
66 static uint16_t scan_parameters_service_scan_window = 0;
67 static uint16_t scan_parameters_service_scan_interval = 0;
68
69 static void handle_gatt_client_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
70 static void scan_parameters_service_send_next_query(void * context);
71 static btstack_context_callback_registration_t scan_parameters_service_handle_can_send_now;
72
scan_parameters_service_get_next_cid(void)73 static uint16_t scan_parameters_service_get_next_cid(void){
74 if (scan_parameters_service_cid_counter == 0xffff) {
75 scan_parameters_service_cid_counter = 1;
76 } else {
77 scan_parameters_service_cid_counter++;
78 }
79 return scan_parameters_service_cid_counter;
80 }
81
scan_parameters_client_request_send_gatt_query(scan_parameters_service_client_t * client)82 static uint8_t scan_parameters_client_request_send_gatt_query(scan_parameters_service_client_t * client){
83 scan_parameters_service_handle_can_send_now.context = (void *) (uintptr_t)client->cid;
84 uint8_t status = gatt_client_request_to_send_gatt_query(&scan_parameters_service_handle_can_send_now, client->con_handle);
85 if (status != ERROR_CODE_SUCCESS){
86 if (client->state >= SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W2_QUERY_SERVICE){
87 client->state = SCAN_PARAMETERS_SERVICE_CLIENT_STATE_IDLE;
88 }
89 }
90 return status;
91 }
92
scan_parameters_service_create_client(hci_con_handle_t con_handle,uint16_t cid)93 static scan_parameters_service_client_t * scan_parameters_service_create_client(hci_con_handle_t con_handle, uint16_t cid){
94 scan_parameters_service_client_t * client = btstack_memory_scan_parameters_service_client_get();
95 if (!client){
96 log_error("Not enough memory to create client");
97 return NULL;
98 }
99
100 client->cid = cid;
101 client->con_handle = con_handle;
102 client->state = SCAN_PARAMETERS_SERVICE_CLIENT_STATE_IDLE;
103
104 client->start_handle = 0;
105 client->end_handle = 0;
106
107 client->scan_interval_window_value_handle = 0;
108 client->scan_interval_window_value_update = false;
109 btstack_linked_list_add(&clients, (btstack_linked_item_t *) client);
110 return client;
111 }
112
scan_parameters_service_finalize_client(scan_parameters_service_client_t * client)113 static void scan_parameters_service_finalize_client(scan_parameters_service_client_t * client){
114 gatt_client_stop_listening_for_characteristic_value_updates(&client->notification_listener);
115 btstack_linked_list_remove(&clients, (btstack_linked_item_t *) client);
116 btstack_memory_scan_parameters_service_client_free(client);
117 }
118
scan_parameters_service_get_client_for_con_handle(hci_con_handle_t con_handle)119 static scan_parameters_service_client_t * scan_parameters_service_get_client_for_con_handle(hci_con_handle_t con_handle){
120 btstack_linked_list_iterator_t it;
121 btstack_linked_list_iterator_init(&it, &clients);
122 while (btstack_linked_list_iterator_has_next(&it)){
123 scan_parameters_service_client_t * client = (scan_parameters_service_client_t *)btstack_linked_list_iterator_next(&it);
124 if (client->con_handle != con_handle) continue;
125 return client;
126 }
127 return NULL;
128 }
129
scan_parameters_service_get_client_for_cid(uint16_t scan_parameters_service_cid)130 static scan_parameters_service_client_t * scan_parameters_service_get_client_for_cid(uint16_t scan_parameters_service_cid){
131 btstack_linked_list_iterator_t it;
132 btstack_linked_list_iterator_init(&it, &clients);
133 while (btstack_linked_list_iterator_has_next(&it)){
134 scan_parameters_service_client_t * client = (scan_parameters_service_client_t *)btstack_linked_list_iterator_next(&it);
135 if (client->cid != scan_parameters_service_cid) continue;
136 return client;
137 }
138 return NULL;
139 }
140
scan_parameters_service_emit_connection_established(scan_parameters_service_client_t * client,uint8_t status)141 static void scan_parameters_service_emit_connection_established(scan_parameters_service_client_t * client, uint8_t status){
142 uint8_t event[6];
143 int pos = 0;
144 event[pos++] = HCI_EVENT_GATTSERVICE_META;
145 event[pos++] = sizeof(event) - 2;
146 event[pos++] = GATTSERVICE_SUBEVENT_SCAN_PARAMETERS_SERVICE_CONNECTED;
147 little_endian_store_16(event, pos, client->cid);
148 pos += 2;
149 event[pos++] = status;
150 (*client->client_handler)(HCI_EVENT_GATTSERVICE_META, 0, event, sizeof(event));
151 }
152
scan_parameters_service_emit_disconnected(btstack_packet_handler_t packet_handler,uint16_t cid)153 static void scan_parameters_service_emit_disconnected(btstack_packet_handler_t packet_handler, uint16_t cid){
154 uint8_t event[5];
155 int pos = 0;
156 event[pos++] = HCI_EVENT_GATTSERVICE_META;
157 event[pos++] = sizeof(event) - 2;
158 event[pos++] = GATTSERVICE_SUBEVENT_SCAN_PARAMETERS_SERVICE_DISCONNECTED;
159 little_endian_store_16(event, pos, cid);
160 pos += 2;
161 btstack_assert(pos == sizeof(event));
162 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event));
163 }
164
handle_notification_event(uint8_t packet_type,uint16_t channel,uint8_t * packet,uint16_t size)165 static void handle_notification_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) {
166 UNUSED(packet_type);
167 UNUSED(channel);
168 UNUSED(size);
169
170 if (hci_event_packet_get_type(packet) != GATT_EVENT_NOTIFICATION) return;
171
172 scan_parameters_service_client_t * client = scan_parameters_service_get_client_for_con_handle(gatt_event_notification_get_handle(packet));
173 btstack_assert(client != NULL);
174 client->scan_interval_window_value_update = true;
175 scan_parameters_client_request_send_gatt_query(client);
176 }
177
scan_parameters_service_send_next_query(void * context)178 static void scan_parameters_service_send_next_query(void * context){
179 uint16_t cid = (uint16_t)(uintptr_t)context;
180 scan_parameters_service_client_t * client = scan_parameters_service_get_client_for_cid(cid);
181 if (client == NULL){
182 return;
183 }
184
185 uint8_t att_status;
186 gatt_client_service_t service;
187
188 gatt_client_characteristic_t characteristic;
189
190 switch (client->state){
191 case SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W2_QUERY_SERVICE:
192 #ifdef ENABLE_TESTING_SUPPORT
193 printf("\n\nQuery Services:\n");
194 #endif
195 client->state = SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W4_SERVICE_RESULT;
196 att_status = gatt_client_discover_primary_services_by_uuid16(handle_gatt_client_event, client->con_handle, ORG_BLUETOOTH_SERVICE_SCAN_PARAMETERS);
197 // TODO handle status
198 UNUSED(att_status);
199 break;
200
201 case SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W2_QUERY_CHARACTERISTIC:
202 #ifdef ENABLE_TESTING_SUPPORT
203 printf("\n\nQuery Characteristics of service\n");
204 #endif
205 client->state = SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W4_CHARACTERISTIC_RESULT;
206 service.start_group_handle = client->start_handle;
207 service.end_group_handle = client->end_handle;
208 att_status = gatt_client_discover_characteristics_for_service(
209 handle_gatt_client_event, client->con_handle, &service);
210 // TODO handle status
211 UNUSED(att_status);
212 break;
213
214 case SCAN_PARAMETERS_SERVICE_CLIENT_STATE_CONNECTED:
215 if (client->scan_interval_window_value_update){
216 client->scan_interval_window_value_update = false;
217
218 #ifdef ENABLE_TESTING_SUPPORT
219 printf("\n\nUpdate - interval %d, window %d:\n", scan_parameters_service_scan_interval, scan_parameters_service_scan_window);
220 #endif
221 uint8_t value[4];
222 little_endian_store_16(value, 0, scan_parameters_service_scan_interval);
223 little_endian_store_16(value, 2, scan_parameters_service_scan_window);
224
225 att_status = gatt_client_write_value_of_characteristic_without_response(client->con_handle, client->scan_interval_window_value_handle, 4, value);
226 // TODO handle status
227 UNUSED(att_status);
228 }
229 break;
230 #ifdef ENABLE_TESTING_SUPPORT
231 case SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W2_QUERY_CCC:
232 client->state = SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W4_CCC;
233
234 characteristic.value_handle = client->scan_refresh_value_handle;
235 characteristic.end_handle = client->scan_refresh_end_handle;
236
237 // result in GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT
238 att_status = gatt_client_discover_characteristic_descriptors(&handle_gatt_client_event, client->con_handle, &characteristic);
239 UNUSED(att_status);
240 break;
241 #endif
242 case SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W2_CONFIGURE_NOTIFICATIONS:
243 #ifdef ENABLE_TESTING_SUPPORT
244 printf(" Notification configuration enable ");
245 #endif
246
247 client->state = SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W4_NOTIFICATIONS_CONFIGURED;
248
249 characteristic.value_handle = client->scan_refresh_value_handle;
250 characteristic.end_handle = client->scan_refresh_end_handle;
251 characteristic.properties = client->scan_refresh_properties;
252
253 // end of write marked in GATT_EVENT_QUERY_COMPLETE
254
255 att_status = gatt_client_write_client_characteristic_configuration(&handle_gatt_client_event, client->con_handle, &characteristic, GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION);
256
257 if (att_status == ERROR_CODE_SUCCESS){
258 gatt_client_listen_for_characteristic_value_updates(
259 &client->notification_listener,
260 &handle_notification_event, client->con_handle, &characteristic);
261 }
262 client->state = SCAN_PARAMETERS_SERVICE_CLIENT_STATE_CONNECTED;
263 break;
264 default:
265 break;
266 }
267 }
268
handle_gatt_client_event(uint8_t packet_type,uint16_t channel,uint8_t * packet,uint16_t size)269 static void handle_gatt_client_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
270 UNUSED(packet_type);
271 UNUSED(channel);
272 UNUSED(size);
273
274 scan_parameters_service_client_t * client = NULL;
275 gatt_client_service_t service;
276 gatt_client_characteristic_t characteristic;
277 uint8_t status;
278
279 #ifdef ENABLE_TESTING_SUPPORT
280 gatt_client_characteristic_descriptor_t characteristic_descriptor;
281 #endif
282
283 switch(hci_event_packet_get_type(packet)){
284 case GATT_EVENT_SERVICE_QUERY_RESULT:
285 client = scan_parameters_service_get_client_for_con_handle(gatt_event_service_query_result_get_handle(packet));
286 btstack_assert(client != NULL);
287
288 if (client->state != SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W4_SERVICE_RESULT) {
289 scan_parameters_service_emit_connection_established(client, GATT_CLIENT_IN_WRONG_STATE);
290 scan_parameters_service_finalize_client(client);
291 return;
292 }
293
294 gatt_event_service_query_result_get_service(packet, &service);
295 client->start_handle = service.start_group_handle;
296 client->end_handle = service.end_group_handle;
297 #ifdef ENABLE_TESTING_SUPPORT
298 printf("ScS Service: start handle 0x%04X, end handle 0x%04X\n", client->start_handle, client->end_handle);
299 #endif
300 break;
301
302 case GATT_EVENT_CHARACTERISTIC_QUERY_RESULT:
303 client = scan_parameters_service_get_client_for_con_handle(gatt_event_characteristic_query_result_get_handle(packet));
304 btstack_assert(client != NULL);
305
306 // found scan_interval_window_value_handle, check att_status
307 gatt_event_characteristic_query_result_get_characteristic(packet, &characteristic);
308 switch (characteristic.uuid16){
309 case ORG_BLUETOOTH_CHARACTERISTIC_SCAN_INTERVAL_WINDOW:
310 client->scan_interval_window_value_handle = characteristic.value_handle;
311
312 #ifdef ENABLE_TESTING_SUPPORT
313 printf("ScS Scan Interval Characteristic: \n Attribute Handle 0x%04X, Properties 0x%02X, Handle 0x%04X, UUID 0x%04X\n",
314 characteristic.start_handle,
315 characteristic.properties,
316 characteristic.value_handle, characteristic.uuid16);
317 #endif
318 break;
319 case ORG_BLUETOOTH_CHARACTERISTIC_SCAN_REFRESH:
320 client->scan_refresh_value_handle = characteristic.value_handle;
321 client->scan_refresh_end_handle = characteristic.end_handle;
322 client->scan_refresh_properties = characteristic.properties;
323
324 #ifdef ENABLE_TESTING_SUPPORT
325 printf("ScS Scan Refresh Characteristic: \n Attribute Handle 0x%04X, Properties 0x%02X, Handle 0x%04X, UUID 0x%04X\n",
326 characteristic.start_handle,
327 characteristic.properties,
328 characteristic.value_handle, characteristic.uuid16);
329 #endif
330 break;
331 default:
332 break;
333 }
334 break;
335
336 #ifdef ENABLE_TESTING_SUPPORT
337 case GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT:
338 client = scan_parameters_service_get_client_for_con_handle(gatt_event_all_characteristic_descriptors_query_result_get_handle(packet));
339 btstack_assert(client != NULL);
340
341 gatt_event_all_characteristic_descriptors_query_result_get_characteristic_descriptor(packet, &characteristic_descriptor);
342 if (characteristic_descriptor.uuid16 == ORG_BLUETOOTH_DESCRIPTOR_GATT_CLIENT_CHARACTERISTIC_CONFIGURATION){
343 printf(" Client Characteristic Configuration Descriptor: Handle 0x%04X, UUID 0x%04X\n",
344 characteristic_descriptor.handle,
345 characteristic_descriptor.uuid16);
346 }
347 break;
348
349 case GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT:
350 client = scan_parameters_service_get_client_for_con_handle(gatt_event_characteristic_value_query_result_get_handle(packet));
351 btstack_assert(client != NULL);
352
353 printf(" Received CCC value: ");
354 printf_hexdump(gatt_event_characteristic_value_query_result_get_value(packet), gatt_event_characteristic_value_query_result_get_value_length(packet));
355 break;
356 #endif
357
358 case GATT_EVENT_QUERY_COMPLETE:
359 client = scan_parameters_service_get_client_for_con_handle(gatt_event_query_complete_get_handle(packet));
360 btstack_assert(client != NULL);
361
362 status = gatt_client_att_status_to_error_code(gatt_event_query_complete_get_att_status(packet));
363
364 switch (client->state){
365 case SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W4_SERVICE_RESULT:
366 if (status != ERROR_CODE_SUCCESS){
367 scan_parameters_service_emit_connection_established(client, status);
368 scan_parameters_service_finalize_client(client);
369 return;
370 }
371
372 if (client->start_handle != 0){
373 client->state = SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W2_QUERY_CHARACTERISTIC;
374 break;
375 }
376
377 scan_parameters_service_emit_connection_established(client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE);
378 scan_parameters_service_finalize_client(client);
379 return;
380
381 case SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W4_CHARACTERISTIC_RESULT:
382 if (status != ERROR_CODE_SUCCESS){
383 scan_parameters_service_emit_connection_established(client, status);
384 scan_parameters_service_finalize_client(client);
385 break;
386 }
387 if (client->scan_interval_window_value_handle == 0){
388 scan_parameters_service_emit_connection_established(client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE);
389 scan_parameters_service_finalize_client(client);
390 return;
391 }
392 #ifdef ENABLE_TESTING_SUPPORT
393 client->state = SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W2_QUERY_CCC;
394 #else
395 client->state = SCAN_PARAMETERS_SERVICE_CLIENT_STATE_CONNECTED;
396 client->scan_interval_window_value_update = true;
397 scan_parameters_service_emit_connection_established(client, ERROR_CODE_SUCCESS);
398 #endif
399 break;
400
401 #ifdef ENABLE_TESTING_SUPPORT
402 case SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W4_CCC:
403 client->state = SCAN_PARAMETERS_SERVICE_CLIENT_STATE_CONNECTED;
404 client->scan_interval_window_value_update = true;
405 scan_parameters_service_emit_connection_established(client, ERROR_CODE_SUCCESS);
406 break;
407 #endif
408 default:
409 break;
410 }
411 if (client != NULL){
412 scan_parameters_client_request_send_gatt_query(client);
413 }
414 break;
415 default:
416 break;
417 }
418
419
420 }
421
handle_hci_event(uint8_t packet_type,uint16_t channel,uint8_t * packet,uint16_t size)422 static void handle_hci_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
423 UNUSED(packet_type); // ok: only hci events
424 UNUSED(channel); // ok: there is no channel
425 UNUSED(size); // ok: fixed format events read from HCI buffer
426
427 hci_con_handle_t con_handle;
428 scan_parameters_service_client_t * client;
429
430 switch (hci_event_packet_get_type(packet)) {
431 case HCI_EVENT_DISCONNECTION_COMPLETE:
432 con_handle = hci_event_disconnection_complete_get_connection_handle(packet);
433 client = scan_parameters_service_get_client_for_con_handle(con_handle);
434 if (client != NULL){
435 // emit disconnected
436 btstack_packet_handler_t packet_handler = client->client_handler;
437 uint16_t cid = client->cid;
438 scan_parameters_service_emit_disconnected(packet_handler, cid);
439 // finalize
440 scan_parameters_service_finalize_client(client);
441 }
442 break;
443 default:
444 break;
445 }
446 }
447
scan_parameters_service_client_set(uint16_t scan_interval,uint16_t scan_window)448 void scan_parameters_service_client_set(uint16_t scan_interval, uint16_t scan_window){
449 scan_parameters_service_scan_interval = scan_interval;
450 scan_parameters_service_scan_window = scan_window;
451
452 btstack_linked_list_iterator_t it;
453 btstack_linked_list_iterator_init(&it, &clients);
454 while (btstack_linked_list_iterator_has_next(&it)){
455 scan_parameters_service_client_t * client = (scan_parameters_service_client_t*) btstack_linked_list_iterator_next(&it);
456 client->scan_interval_window_value_update = true;
457 scan_parameters_client_request_send_gatt_query(client);
458 }
459 }
460
scan_parameters_service_client_enable_notifications(uint16_t scan_parameters_service_cid)461 uint8_t scan_parameters_service_client_enable_notifications(uint16_t scan_parameters_service_cid){
462 scan_parameters_service_client_t * client = scan_parameters_service_get_client_for_cid(scan_parameters_service_cid);
463
464 if (client == NULL){
465 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
466 }
467
468 if (client->state != SCAN_PARAMETERS_SERVICE_CLIENT_STATE_CONNECTED) {
469 return ERROR_CODE_COMMAND_DISALLOWED;
470 }
471
472 client->state = SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W2_CONFIGURE_NOTIFICATIONS;
473 return scan_parameters_client_request_send_gatt_query(client);
474 }
475
scan_parameters_service_client_connect(hci_con_handle_t con_handle,btstack_packet_handler_t packet_handler,uint16_t * scan_parameters_service_cid)476 uint8_t scan_parameters_service_client_connect(hci_con_handle_t con_handle, btstack_packet_handler_t packet_handler, uint16_t * scan_parameters_service_cid){
477 btstack_assert(packet_handler != NULL);
478
479 scan_parameters_service_client_t * client = scan_parameters_service_get_client_for_con_handle(con_handle);
480 if (client != NULL){
481 return ERROR_CODE_COMMAND_DISALLOWED;
482 }
483
484 uint16_t cid = scan_parameters_service_get_next_cid();
485 if (scan_parameters_service_cid != NULL) {
486 *scan_parameters_service_cid = cid;
487 }
488
489 client = scan_parameters_service_create_client(con_handle, cid);
490 if (client == NULL) {
491 return BTSTACK_MEMORY_ALLOC_FAILED;
492 }
493
494 client->client_handler = packet_handler;
495 client->state = SCAN_PARAMETERS_SERVICE_CLIENT_STATE_W2_QUERY_SERVICE;
496 return scan_parameters_client_request_send_gatt_query(client);
497 }
498
scan_parameters_service_client_disconnect(uint16_t scan_parameters_service_cid)499 uint8_t scan_parameters_service_client_disconnect(uint16_t scan_parameters_service_cid){
500 scan_parameters_service_client_t * client = scan_parameters_service_get_client_for_cid(scan_parameters_service_cid);
501 if (client == NULL){
502 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
503 }
504 // finalize connections
505 scan_parameters_service_finalize_client(client);
506 return ERROR_CODE_SUCCESS;
507 }
508
scan_parameters_service_client_init(void)509 void scan_parameters_service_client_init(void){
510 hci_event_callback_registration.callback = &handle_hci_event;
511 hci_add_event_handler(&hci_event_callback_registration);
512 scan_parameters_service_handle_can_send_now.callback = &scan_parameters_service_send_next_query;
513 }
514
scan_parameters_service_client_deinit(void)515 void scan_parameters_service_client_deinit(void){
516 }
517
518