adding argument to check if port is secured

src/iptables_wrapper.rs

@@ -1,5 +1,20 @@
 use iptables::IPTables;
 
+pub fn is_port_secured(port: u16, docker: bool) -> bool {
+    let iptables = iptables::new(false).unwrap();
+    let rules = iptables.list("filter", &get_chain(docker));
+    if rules.is_err() {
+        return false;
+    }
+
+    for rule in rules.unwrap() {
+        if rule.contains(&format!("-p tcp --dport {} -j DROP", port)) {
+            return true;
+        }
+    }
+    false
+}
+
 pub fn ban_port(port: u16, docker: bool, position: Option<i32>) {
     let iptables = iptables::new(false).unwrap();