1 /*
2 * Copyright (c) 2025 Nordic Semiconductor ASA
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <zephyr/kernel.h>
8
9 #include <zephyr/bluetooth/bluetooth.h>
10 #include <zephyr/bluetooth/conn.h>
11 #include <zephyr/bluetooth/gatt.h>
12 #include <zephyr/bluetooth/att.h>
13
14 #include <zephyr/logging/log.h>
15
16 LOG_MODULE_REGISTER(bt_testlib_att, LOG_LEVEL_DBG);
17
18 static uint8_t exchange_mtu_err;
19 static K_MUTEX_DEFINE(exchange_mtu_lock);
20 static K_CONDVAR_DEFINE(exchange_mtu_done);
21
bt_testlib_att_exchange_mtu_cb(struct bt_conn * conn,uint8_t err,struct bt_gatt_exchange_params * params)22 static void bt_testlib_att_exchange_mtu_cb(struct bt_conn *conn, uint8_t err,
23 struct bt_gatt_exchange_params *params)
24 {
25 char addr[BT_ADDR_LE_STR_LEN];
26
27 k_mutex_lock(&exchange_mtu_lock, K_FOREVER);
28
29 bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));
30
31 LOG_DBG("MTU exchange %s (%s)", err == 0U ? "successful" : "failed", addr);
32
33 exchange_mtu_err = err;
34
35 k_condvar_signal(&exchange_mtu_done);
36
37 k_mutex_unlock(&exchange_mtu_lock);
38 }
39
bt_testlib_att_exchange_mtu(struct bt_conn * conn)40 int bt_testlib_att_exchange_mtu(struct bt_conn *conn)
41 {
42 int err;
43 struct bt_gatt_exchange_params exchange_mtu_params;
44
45 __ASSERT_NO_MSG(conn != NULL);
46
47 k_mutex_lock(&exchange_mtu_lock, K_FOREVER);
48
49 exchange_mtu_err = 0;
50
51 exchange_mtu_params.func = bt_testlib_att_exchange_mtu_cb;
52
53 err = bt_gatt_exchange_mtu(conn, &exchange_mtu_params);
54 if (err != 0) {
55 LOG_ERR("Failed to exchange MTU (err %d)", err);
56
57 k_mutex_unlock(&exchange_mtu_lock);
58
59 return err;
60 }
61
62 k_condvar_wait(&exchange_mtu_done, &exchange_mtu_lock, K_FOREVER);
63
64 err = exchange_mtu_err;
65
66 k_mutex_unlock(&exchange_mtu_lock);
67
68 return err;
69 }
70
