add: is active parameter

src/async_resolver/server_entry.rs

@@ -1,21 +1,24 @@
 use crate::async_resolver::server_info::ServerInfo;
 
 /// Struct that holds the state of a single server for a request.
+#[derive(Clone)]
 pub struct ServerEntry {
     info: ServerInfo,
     retransmissions: u32,
+    is_active: bool,
 }
 
 impl ServerEntry {
     pub fn new(info: ServerInfo) -> ServerEntry {
         ServerEntry {
             info,
             retransmissions: 0,
+            is_active: true,
         }
     }
 
     pub fn get_info(&self) -> &ServerInfo {
-        &self.info
+        &self.info// TODO: see if this is necessary to use clone or not, in order to reuse TCP connections
     }
 
     pub fn get_retransmissions(&self) -> u32 {
@@ -29,4 +32,12 @@ impl ServerEntry {
     pub fn reset_retransmissions(&mut self) {
         self.retransmissions = 0;
     }
+
+    pub fn is_active(&self) -> bool {
+        self.is_active
+    }
+
+    pub fn set_active(&mut self, is_active: bool) {
+        self.is_active = is_active;
+    }
 }