net: if we are a MN, don't accept incoming connections until the node…

… is fully synced.

src/net.cpp

@@ -23,6 +23,7 @@
 #include "primitives/transaction.h"
 #include "scheduler.h"
 #include "tiertwo/net_masternodes.h"
+#include "tiertwo/tiertwo_sync_state.h"
 #include "validation.h"
 
 #ifdef WIN32
@@ -1111,6 +1112,13 @@ void CConnman::AcceptConnection(const ListenSocket& hListenSocket) {
         return;
     }
 
+    // if we are a MN, don't accept incoming connections until fully synced
+    if (fMasterNode && !g_tiertwo_sync_state.IsSynced()) {
+        LogPrint(BCLog::NET, "AcceptConnection -- masternode is not synced yet, skipping inbound connection attempt\n");
+        CloseSocket(hSocket);
+        return;
+    }
+
     // TODO: pending review.
     // Evict connections until we are below nMaxInbound. In case eviction protection resulted in nodes to not be evicted
     // before, they might get evicted in batches now (after the protection timeout).