From 309bcbdfa583f770385f8d0241268936f515556d Mon Sep 17 00:00:00 2001
From: Peter Cai <peter@typeblog.net>
Date: Sun, 4 Apr 2021 13:30:59 +0800
Subject: [PATCH] client: add comments about NXDOMAIN

---
 src/client.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/client.rs b/src/client.rs
index a2bd06e..6b48c0d 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -33,6 +33,8 @@ impl Client {
 
         match resp.header().rcode() {
             Rcode::NoError => Self::extract_answers(resp),
+            // NXDOMAIN is not an error we want to retry / panic upon
+            // It simply means the domain doesn't exist
             Rcode::NXDomain => Ok(Vec::new()),
             rcode => Err(format!("Server error: {}", rcode)),
         }