Do not set extra flags for unfiltered DNS seed results

1 files changed, 13 insertions, 1 deletions

diff --git a/src/net.cpp b/src/net.cpp
index a390eca776..5e791291c7 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)
                 {