Added last_handshake_time fields to UAPI

src/peer.go

@@ -19,9 +19,12 @@ type Peer struct {
 	keyPairs                    KeyPairs
 	handshake                   Handshake
 	device                      *Device
-	txBytes                     uint64
-	rxBytes                     uint64
-	time                        struct {
+	stats                       struct {
+		txBytes           uint64 // bytes send to peer (endpoint)
+		rxBytes           uint64 // bytes received from peer
+		lastHandshakeNano int64  // nano seconds since epoch
+	}
+	time struct {
 		mutex         sync.RWMutex
 		lastSend      time.Time // last send message
 		lastHandshake time.Time // last completed handshake