Fix bug with deserializing FqCodelXStats

`deserialize` was called on entire `bytes` array when it was supposed to be offset by 4 bytes.

src/qdiscs/fq_codel.rs

@@ -120,7 +120,7 @@ fn unmarshal_fq_codel_xstats(bytes: &[u8]) -> Result<FqCodelXStats, TcError> {
         .map_err(|_| TcError::Decode("Failed to extract FqCodel XStats kind".to_string()))?;
     let kind = u32::from_ne_bytes(buf);
     if kind == 0 {
-        bincode::deserialize(bytes).map_err(|e| TcError::UnmarshalStruct(e))
+        bincode::deserialize(&bytes[4..]).map_err(|e| TcError::UnmarshalStruct(e))
     } else {
         Err(TcError::InvalidAttribute(format!(
             "FqCodel XStats has unidentified kind: {kind}"

src/tc.rs

@@ -108,6 +108,7 @@ pub fn qdiscs<T: netlink::NetlinkConnection>() -> Result<Vec<Tc>, TcError> {
     let mut tcs = Vec::new();
 
     let messages = T::new()?.qdiscs()?;
+    // println!("messages: {:?}", messages);
     for message in &messages {
         let tc = TcMessage {
             index: message.header.index as u32,
@@ -143,7 +144,6 @@ pub fn qdiscs<T: netlink::NetlinkConnection>() -> Result<Vec<Tc>, TcError> {
                         }
                     }
                 }
-                // netlink_tc::Nla::QDisc(q_disc) => parse_qdisc(&mut tc, q_disc),
                 netlink_tc::Nla::XStats(bytes) => xstats = bytes.clone(),
                 _ => (),
             }