From 67282f03c01c32d508ecc91888703c3d01696081 Mon Sep 17 00:00:00 2001
From: Jeff Becker <jeff@i2p.rocks>
Date: Tue, 5 Feb 2019 08:01:56 -0500
Subject: [PATCH] disable recursion on nxdomain responses

---
 llarp/dns/message.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/llarp/dns/message.cpp b/llarp/dns/message.cpp
index 929352886..1a151b0fa 100644
--- a/llarp/dns/message.cpp
+++ b/llarp/dns/message.cpp
@@ -248,6 +248,10 @@ namespace llarp
       if(questions.size())
       {
         hdr_fields |= flags_QR;
+        // don't allow recursion
+        hdr_fields &= ~flags_RD;
+        // don't advertise recurision
+        hdr_fields &= ~flags_RA;
         const auto& question = questions[0];
         if(question.qtype != qTypeAAAA)
         {