Move network protocol implementation behind an interface

src/network/peerhandler.h

@@ -24,17 +24,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 namespace con
 {
 
-typedef enum
-{
-	MIN_RTT,
-	MAX_RTT,
-	AVG_RTT,
-	MIN_JITTER,
-	MAX_JITTER,
-	AVG_JITTER
-} rtt_stat_type;
-
-class Peer;
+class IPeer;
 
 class PeerHandler
 {
@@ -47,13 +37,13 @@ public:
 		This is called after the Peer has been inserted into the
 		Connection's peer container.
 	*/
-	virtual void peerAdded(Peer *peer) = 0;
+	virtual void peerAdded(IPeer *peer) = 0;
 
 	/*
 		This is called before the Peer has been removed from the
 		Connection's peer container.
 	*/
-	virtual void deletingPeer(Peer *peer, bool timeout) = 0;
+	virtual void deletingPeer(IPeer *peer, bool timeout) = 0;
 };
 
 enum PeerChangeType : u8