fix(dnstap source): prevent error message when DOQ is encountered (#25495)

* fix(dnstap source): prevent error message when DOQ is encountered

* Add changelog entry

* Fix typo in changelog

---------

Co-authored-by: Pavlos Rontidis <pavlos.rontidis@gmail.com>
Co-authored-by: Thomas <thomas.schneider@datadoghq.com>

Author: 3 people

changelog.d/25495_dnstap_parser_doq_support.fix.md

@@ -0,0 +1,4 @@
+Added support for DOQ socket protocol in dnstap source. This will prevent error messages when DOQ
+traffic is encountered.
+
+authors: esensar Quad9DNS

lib/vector-vrl/dnstap-parser/src/parser.rs

@@ -1009,23 +1009,9 @@ fn to_socket_family_name(socket_family: i32) -> Result<&'static str> {
 }
 
 fn to_socket_protocol_name(socket_protocol: i32) -> Result<&'static str> {
-    if socket_protocol == SocketProtocol::Udp as i32 {
-        Ok("UDP")
-    } else if socket_protocol == SocketProtocol::Tcp as i32 {
-        Ok("TCP")
-    } else if socket_protocol == SocketProtocol::Dot as i32 {
-        Ok("DOT")
-    } else if socket_protocol == SocketProtocol::Doh as i32 {
-        Ok("DOH")
-    } else if socket_protocol == SocketProtocol::DnsCryptUdp as i32 {
-        Ok("DNSCryptUDP")
-    } else if socket_protocol == SocketProtocol::DnsCryptTcp as i32 {
-        Ok("DNSCryptTCP")
-    } else {
-        Err(Error::from(format!(
-            "Unknown socket protocol: {socket_protocol}"
-        )))
-    }
+    SocketProtocol::try_from(socket_protocol)
+        .map_err(|_| Error::from(format!("Unknown socket protocol: {socket_protocol}")))
+        .map(|sp| sp.as_str_name())
 }
 
 fn to_dnstap_data_type(data_type_id: i32) -> Option<String> {
@@ -1449,6 +1435,7 @@ mod tests {
         assert_eq!("DOH", to_socket_protocol_name(4).unwrap());
         assert_eq!("DNSCryptUDP", to_socket_protocol_name(5).unwrap());
         assert_eq!("DNSCryptTCP", to_socket_protocol_name(6).unwrap());
-        assert!(to_socket_protocol_name(7).is_err());
+        assert_eq!("DOQ", to_socket_protocol_name(7).unwrap());
+        assert!(to_socket_protocol_name(8).is_err());
     }
 }