Always use HELLO to contact, and we now confirm newly learned paths via a two-way handshake to prevent half-connects.

node/Peer.hpp

@@ -169,6 +169,19 @@ public:
 		return (Path *)0;
 	}
 
+	/**
+	 * Send a HELLO to this peer at a specified physical address
+	 *
+	 * This does not update any statistics. It's used to send initial HELLOs
+	 * for NAT traversal and path verification.
+	 *
+	 * @param RR Runtime environment
+	 * @param atAddress Destination address
+	 * @param linkDesperation Link desperation
+	 * @param now Current time
+	 */
+	void attemptToContactAt(const RuntimeEnvironment *RR,const InetAddress &atAddress,unsigned int linkDesperation,uint64_t now);
+
 	/**
 	 * @return All known direct paths to this peer
 	 */