Added last_handshake_time fields to UAPI

src/config.go

@@ -10,6 +10,7 @@ import (
 	"strings"
 	"sync/atomic"
 	"syscall"
+	"time"
 )
 
 const (
@@ -58,8 +59,15 @@ func ipcGetOperation(device *Device, socket *bufio.ReadWriter) *IPCError {
 			if peer.endpoint != nil {
 				send("endpoint=" + peer.endpoint.String())
 			}
-			send(fmt.Sprintf("tx_bytes=%d", peer.txBytes))
-			send(fmt.Sprintf("rx_bytes=%d", peer.rxBytes))
+
+			nano := atomic.LoadInt64(&peer.stats.lastHandshakeNano)
+			secs := nano / time.Second.Nanoseconds()
+			nano %= time.Second.Nanoseconds()
+
+			send(fmt.Sprintf("last_handshake_time_sec=%d", secs))
+			send(fmt.Sprintf("last_handshake_time_nsec=%d", nano))
+			send(fmt.Sprintf("tx_bytes=%d", peer.stats.txBytes))
+			send(fmt.Sprintf("rx_bytes=%d", peer.stats.rxBytes))
 			send(fmt.Sprintf("persistent_keepalive_interval=%d",
 				atomic.LoadUint64(&peer.persistentKeepaliveInterval),
 			))

src/peer.go

@@ -19,8 +19,11 @@ type Peer struct {
 	keyPairs                    KeyPairs
 	handshake                   Handshake
 	device                      *Device
-	txBytes                     uint64
-	rxBytes                     uint64
+	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

src/receive.go

@@ -540,7 +540,7 @@ func (peer *Peer) RoutineSequentialReceiver() {
 				return
 			}
 
-			atomic.AddUint64(&peer.rxBytes, uint64(len(elem.packet)))
+			atomic.AddUint64(&peer.stats.rxBytes, uint64(len(elem.packet)))
 			device.addToInboundQueue(device.queue.inbound, elem)
 		}()
 	}

src/send.go

@@ -379,7 +379,8 @@ func (peer *Peer) RoutineSequentialSender() {
 				if err != nil {
 					return
 				}
-				atomic.AddUint64(&peer.txBytes, uint64(len(elem.packet)))
+
+				atomic.AddUint64(&peer.stats.txBytes, uint64(len(elem.packet)))
 				peer.TimerResetKeepalive()
 			}()
 

src/timers.go

@@ -52,6 +52,10 @@ func (peer *Peer) KeepKeyFreshReceiving() {
 func (peer *Peer) EventHandshakeComplete() {
 	peer.device.log.Info.Println("Negotiated new handshake for", peer.String())
 	peer.timer.zeroAllKeys.Reset(RejectAfterTime * 3)
+	atomic.StoreInt64(
+		&peer.stats.lastHandshakeNano,
+		time.Now().UnixNano(),
+	)
 	signalSend(peer.signal.handshakeCompleted)
 }