From 12038465f66061970a6659f4c0f26c0a0ace56be Mon Sep 17 00:00:00 2001
From: AJ ONeal <aj@daplie.com>
Date: Fri, 15 Dec 2017 02:25:23 -0700
Subject: [PATCH] allow empty string in query

---
 dns.packer.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/dns.packer.js b/dns.packer.js
index 61f876a..bba95f0 100644
--- a/dns.packer.js
+++ b/dns.packer.js
@@ -29,7 +29,7 @@ var dnspack = exports.DNS_PACKER = {
     dv.setUint16(10, (packet.additional||[]).length + (packet.payload ? 1 : 0), false);
 
     function lint(r) {
-      if (!r.name) {
+      if (!r.name && 'string' !== typeof r.name) {
         throw new Error("missing name");
       }
 
@@ -70,7 +70,8 @@ var dnspack = exports.DNS_PACKER = {
         labelsMap[total] = { total: total, name: sequence };
         labelsMap[sequence] = labelsMap[total];
       }
-      sequence.split('.').forEach(function (label) {
+      // allow 0-length string for TLD root NS queries
+      (sequence && sequence.split('.') || []).forEach(function (label) {
         dv.setUint8(total, label.length, false);
         total += 1;