feat: Enhance resolveDefault to handle Stage 2 failures and fallback to Stage 3 A queries

README.md

@@ -1,4 +1,4 @@
-# ekekDNSHelper
+# ekDNSHelper
 
 A cross-platform CLI tool that resolves hostnames against DNS servers and writes the resulting IP-to-hostname mappings into the local hosts file. It manages a clearly delimited block within the hosts file so it can cleanly add and remove only its own entries.
 
@@ -6,7 +6,7 @@ By default, ekdns performs **smart resolution**: it discovers the authoritative
 
 Built as a single static binary with no runtime dependencies.
 
-**Copyright (c) 2024 Emberkom LLC**
+**Copyright (c) 2026 Emberkom LLC**
 
 ## Features
 

resolver/modes.go

@@ -85,11 +85,19 @@ func resolveDefault(hostname string, pool []string, localResolvers []string, con
 	if authority != nil {
 		fmt.Fprintf(w, "[dns] Selected authority: %s → %s\n",
 			authority.Zone, strings.Join(authority.Nameservers, ", "))
-		return resolveAuthoritative(ctx, authority, hostname, pool, localResolvers, config, depth, w)
+		ips, err := resolveAuthoritative(ctx, authority, hostname, pool, localResolvers, config, depth, w)
+		if err == nil {
+			return ips, nil
+		}
+		// Stage 2 failed (e.g. sub-zone delegation referral not followed) —
+		// fall through to Stage 3 parallel A fallback.
+		fmt.Fprintf(w, "[dns] Stage 2 failed: %v\n", err)
+		fmt.Fprintf(w, "[dns] Falling back to Stage 3 parallel A queries\n")
+	} else {
+		fmt.Fprintf(w, "[dns] Stage 1: No NS records found at any level\n")
 	}
 
-	// Stage 3: No NS records found — fall back to parallel A queries.
-	fmt.Fprintf(w, "[dns] Stage 1: No NS records found at any level\n")
+	// Stage 3: Fall back to parallel recursive A queries.
 	ips, err := ParallelAFallback(ctx, w, pool, hostname, timeout)
 	if err != nil {
 		return nil, addPrivateTLDHint(hostname, err)