From bc0a895d810107132651c8178e95a981b9f3ff74 Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Wed, 15 Jun 2016 19:31:28 +0200
Subject: Do not set extra flags for unfiltered DNS seed results

---
 src/net.cpp | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

(limited to 'src/net.cpp')

diff --git a/src/net.cpp b/src/net.cpp
index a390eca77..5e791291c 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -1415,6 +1415,18 @@ void MapPort(bool)
 
 
 
+static std::string GetDNSHost(const CDNSSeedData& data, ServiceFlags* requiredServiceBits)
+{
+    //use default host for non-filter-capable seeds or if we use the default service bits (NODE_NETWORK)
+    if (!data.supportsServiceBitsFiltering || *requiredServiceBits == NODE_NETWORK) {
+        *requiredServiceBits = NODE_NETWORK;
+        return data.host;
+    }
+
+    return strprintf("x%x.%s", *requiredServiceBits, data.host);
+}
+
+
 void ThreadDNSAddressSeed()
 {
     // goal: only query DNS seeds if address need is acute
@@ -1441,7 +1453,7 @@ void ThreadDNSAddressSeed()
             std::vector<CNetAddr> vIPs;
             std::vector<CAddress> vAdd;
             ServiceFlags requiredServiceBits = nRelevantServices;
-            if (LookupHost(seed.getHost(requiredServiceBits).c_str(), vIPs, 0, true))
+            if (LookupHost(GetDNSHost(seed, &requiredServiceBits).c_str(), vIPs, 0, true))
             {
                 BOOST_FOREACH(const CNetAddr& ip, vIPs)
                 {
-- 
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