disable recursion on nxdomain responses

5 years ago · 67282f03c0
parent 5a33d2c84a
commit 67282f03c0
1 changed files with 4 additions and 0 deletions
--- 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)
        {