small action tweak

src/pus/action.rs

@@ -32,7 +32,9 @@ use super::{
     TargetedPusService,
 };
 
-pub const DATA_REPLY: u8 = 130;
+pub enum Subservice {
+    DataReply = 130,
+}
 
 pub struct ActionReplyHandler {
     fail_data_buf: [u8; 128],
@@ -275,7 +277,8 @@ pub fn send_data_reply<TmSender: EcssTmSender>(
     tm_sender: &TmSender,
 ) -> Result<(), EcssTmtcError> {
     let sp_header = SpHeader::new_from_apid(apid_target.apid);
-    let sec_header = PusTmSecondaryHeader::new(8, DATA_REPLY, 0, 0, stamp_helper.stamp());
+    let sec_header =
+        PusTmSecondaryHeader::new(8, Subservice::DataReply as u8, 0, 0, stamp_helper.stamp());
     let mut data = Vec::new();
     data.extend(apid_target.apid.to_be_bytes());
     data.extend(apid_target.unique_id.to_be_bytes());