From d9f995209c3cc7bda242e8752680d78684fd62e4 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Thu, 30 May 2019 15:15:54 +0200
Subject: device: add SendKeepalivesToPeersWithCurrentKeypair for handover

---
 device/device.go | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/device/device.go b/device/device.go
index fa7ed88..7775844 100644
--- a/device/device.go
+++ b/device/device.go
@@ -396,3 +396,20 @@ func (device *Device) Close() {
 func (device *Device) Wait() chan struct{} {
 	return device.signals.stop
 }
+
+func (device *Device) SendKeepalivesToPeersWithCurrentKeypair() {
+	if device.isClosed.Get() {
+		return
+	}
+
+	device.peers.RLock()
+	for _, peer := range device.peers.keyMap {
+		peer.keypairs.RLock()
+		sendKeepalive := peer.keypairs.current != nil && !peer.keypairs.current.created.Add(RejectAfterTime).Before(time.Now())
+		peer.keypairs.RUnlock()
+		if sendKeepalive {
+			peer.SendKeepalive()
+		}
+	}
+	device.peers.RUnlock()
+}
-- 
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