From d3c9e1df6ce74dee576f81f383f4aa5decea8c62 Mon Sep 17 00:00:00 2001
From: Klaus Darilion <klaus.darilion@nic.at>
Date: Tue, 5 Apr 2016 07:09:21 +0000
Subject: [PATCH] handle SOAs with serial 0 correctly in incoming AXFR

---
 pdns/slavecommunicator.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pdns/slavecommunicator.cc b/pdns/slavecommunicator.cc
index b53aaac4b1..47a952f46f 100644
--- a/pdns/slavecommunicator.cc
+++ b/pdns/slavecommunicator.cc
@@ -147,6 +147,7 @@ void CommunicatorClass::suck(const DNSName &domain,const string &remote)
 
     bool first=true;
     bool firstNSEC3=true;
+    bool soa_received = false;
     unsigned int soa_serial = 0;
     set<DNSName> nsset, qnames, secured;
     vector<DNSResourceRecord> rrs;
@@ -199,11 +200,12 @@ void CommunicatorClass::suck(const DNSName &domain,const string &remote)
               continue;
             }
             case QType::SOA: {
-              if(soa_serial != 0)
+              if(soa_received)
                 continue; //skip the last SOA
               SOAData sd;
               fillSOAData(rr.content,sd);
               soa_serial = sd.serial;
+              soa_received = true;
               break;
             }
             case QType::NS: {
-- 
2.47.2