1 files changed, 31 insertions, 0 deletions
diff --git a/types/topics/topics.go b/types/topics/topics.go
new file mode 100644
index 000000000..4080ad53b
--- /dev/null
+++ b/types/topics/topics.go
@@ -0,0 +1,31 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+// Package topics defines event types used with the eventbus.
+package topics
+
+import (
+	"tailscale.com/tailcfg"
+	"tailscale.com/types/key"
+)
+
+// DERPConnChange is published when the set of DERP connections changes.
+type DERPConnChange struct {
+	RegionID  int  // DERP region ID
+	Connected bool // true for connected, false for disconnected
+	LiveDERPs int  // total number of live DERP connections after this change
+}
+
+// EndpointsChanged is published when magicsock's endpoints change.
+type EndpointsChanged []tailcfg.Endpoint
+
+// TUNStatusChange is published when the TUN device goes up or down.
+type TUNStatusChange struct {
+	Up bool // true if TUN is up, false if down
+}
+
+// PeerRecvActivity is published periodically when a packet is received from a peer.
+// This is called no more than once every 10 seconds per peer.
+type PeerRecvActivity struct {
+	PeerKey key.NodePublic
+}