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samples: Bluetooth: encrypt llpm sample #11720

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Jul 7, 2023
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samples: Bluetooth: encrypt llpm sample #11720

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33 changes: 25 additions & 8 deletions samples/bluetooth/llpm/src/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -27,8 +27,8 @@

#define DEVICE_NAME CONFIG_BT_DEVICE_NAME
#define DEVICE_NAME_LEN (sizeof(DEVICE_NAME) - 1)
#define INTERVAL_MIN 0x50 /* 80 units, 100 ms */
#define INTERVAL_MAX 0x50 /* 80 units, 100 ms */
#define INTERVAL_MIN 0x6 /* 6 units, 7.5 ms */
#define INTERVAL_MAX 0x6 /* 6 units, 7.5 ms */
#define INTERVAL_LLPM 0x0D01 /* Proprietary 1 ms */
#define INTERVAL_LLPM_US 1000

Expand Down Expand Up @@ -195,18 +195,16 @@ static void connected(struct bt_conn *conn, uint8_t err)
bt_scan_stop();
} else {
bt_le_adv_stop();
err = bt_conn_set_security(conn, BT_SECURITY_L2);
if (err) {
printk("Failed to set security: %d\n", err);
}
}

printk("Connected as %s\n",
conn_info.role == BT_CONN_ROLE_CENTRAL ? "central" : "peripheral");
printk("Conn. interval is %u units (1.25 ms/unit)\n",
conn_info.le.interval);

err = bt_gatt_dm_start(default_conn, BT_UUID_LATENCY, &discovery_cb,
&latency_client);
if (err) {
printk("Discover failed (err %d)\n", err);
}
}

static void disconnected(struct bt_conn *conn, uint8_t reason)
Expand Down Expand Up @@ -414,10 +412,29 @@ static void test_run(void)
}
}

void security_changed(struct bt_conn *conn, bt_security_t level,
enum bt_security_err err)
{
printk("Security changed: level %i, err: %i\n", level, err);

if (err != 0) {
printk("Failed to encrypt link\n");
bt_conn_disconnect(conn, BT_HCI_ERR_PAIRING_NOT_SUPPORTED);
return;
}
/*Start service discovery when link is encrypted*/
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can you add a check that err is non-zero and disconnect/assert if that's the case?

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done

err = bt_gatt_dm_start(default_conn, BT_UUID_LATENCY, &discovery_cb,
&latency_client);
if (err) {
printk("Discover failed (err %d)\n", err);
}
}

BT_CONN_CB_DEFINE(conn_callbacks) = {
.connected = connected,
.disconnected = disconnected,
.le_param_updated = le_param_updated,
.security_changed = security_changed,
};

int main(void)
Expand Down