feat: Add function that applies netmask to ip

src/environment.rs

@@ -16,6 +16,13 @@ pub struct PathEnvironment<'a> {
     path: PathBuf,
 }
 
+fn apply_netmask(
+    ip: ViaDeserialize<Ipv4Addr>,
+    netmask: ViaDeserialize<Ipv4Addr>,
+) -> Result<String, minijinja::Error> {
+    Ok((*ip & *netmask).to_string())
+}
+
 impl<'a> PathEnvironment<'a> {
     pub fn new(path: &Path) -> Self {
         let mut env = Environment::new();
@@ -41,6 +48,8 @@ impl<'a> PathEnvironment<'a> {
             }
         });
 
+        env.add_function("apply_netmask", apply_netmask);
+
         // Helper function for getting the path to kubeconfig files
         env.add_filter("kubeconfig", move |names: Vec<String>| {
             names