mirror/btstack
1
0
Fork 0
mirror of https://github.com/bluekitchen/btstack.git synced 2025-03-23 19:20:51 +00:00
Code Issues Packages Projects Releases Wiki Activity

att_db: add gatt_server_get_database_hash

Browse Source
This commit is contained in:
Matthias Ringwald 2025-03-14 12:37:01 +01:00
parent c24eef3424
commit 00b4f875b0
2 changed files with 31 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
src/ble/att_db.c
View File

@ -42,6 +42,7 @@
#include "ble/att_db.h"
#include "ble/core.h"
#include "bluetooth.h"
#include "bluetooth_gatt.h"
#include "btstack_debug.h"
#include "btstack_util.h"
@ -1644,6 +1645,28 @@ bool gatt_server_get_included_service_with_uuid16(uint16_t start_handle, uint16_
return false;
}
bool gatt_server_get_database_hash(uint8_t * hash) {
att_iterator_t it;
att_iterator_init(&it);
uint16_t value_handle = 0xffff;
while (att_iterator_has_next(&it)){
att_iterator_fetch_next(&it);
// Find Characteristic declaration for Database Hash
if ((it.value_len == 5u) && (att_iterator_match_uuid16(&it, GATT_CHARACTERISTICS_UUID))){
uint16_t characteristic_uuid = little_endian_read_16(it.value, 3);
if (characteristic_uuid == ORG_BLUETOOTH_CHARACTERISTIC_DATABASE_HASH){
value_handle = little_endian_read_16(it.value, 1);
}
}
// Find Characteristic Value for Database Hash and get value
if ((it.handle == value_handle) && (it.value_len == 16u)){
att_copy_value(&it, 0, hash, 16, HCI_CON_HANDLE_INVALID);
return true;
}
}
return false;
}
// 1-item cache to optimize query during write_callback
static void att_persistent_ccc_cache(att_iterator_t * it){
att_persistent_ccc_handle = it->handle;

8
src/ble/att_db.h
View File

@ -420,6 +420,14 @@ uint16_t gatt_server_get_value_handle_for_characteristic_with_uuid128(uint16_t s
*/
uint16_t gatt_server_get_client_configuration_handle_for_characteristic_with_uuid128(uint16_t start_handle, uint16_t end_handle, const uint8_t * uuid128);
/**
* @brief Get Database Hash provided via GATT Database Hash characteristic
* @note Used by att_server to discard stored CCCD values for bonded devices if hash has changed
* @param hash
* @return true if hash is available
*/
bool gatt_server_get_database_hash(uint8_t * hash);
/* API_END */
// non-user functionality for att_server