More refactoring to clean up code, and add a gate function to make sure we do not handle OK packets we did not expect. This hardens up a few potential edge cases around security, since such messages might be used to e.g. pollute a cache and DOS under certain conditions.

node/Network.hpp

@@ -257,6 +257,12 @@ public:
 	 */
 	bool gate(const SharedPtr<Peer> &peer,const Packet::Verb verb,const uint64_t packetId);
 
+	/**
+	 * @param peer Peer to check
+	 * @return True if peer has recently been a valid member of this network
+	 */
+	bool recentlyAllowedOnNetwork(const SharedPtr<Peer> &peer) const;
+
 	/**
 	 * Perform cleanup and possibly save state
 	 */