Default to /32 for an IP

src/common.rs

@@ -35,10 +35,7 @@ impl Error for IpNetworkError {
 pub fn cidr_parts(cidr: &str) -> Result<(&str, &str), IpNetworkError> {
     let parts = cidr.split('/').collect::<Vec<&str>>();
     if parts.len() == 1 {
-        Err(IpNetworkError::InvalidCidrFormat(format!(
-            "CIDR must contain '/': {}",
-            cidr
-        )))
+        Ok((parts[0], "32"))
     } else if parts.len() == 2 {
         Ok((parts[0], parts[1]))
     } else {