Merge pull request #126 from libp2p/feat/single-routability-event

Switch to a single routability event

core/event/reachability.go

@@ -0,0 +1,13 @@
+package event
+
+import (
+	"github.com/libp2p/go-libp2p-core/network"
+)
+
+// EvtLocalReachabilityChanged is an event struct to be emitted when the local's
+// node reachability changes state.
+//
+// This event is usually emitted by the AutoNAT subsystem.
+type EvtLocalReachabilityChanged struct {
+	Reachability network.Reachability
+}

core/network/network.go

@@ -53,6 +53,25 @@ const (
 	CannotConnect
 )
 
+// Reachability indicates how reachable a node is.
+type Reachability int
+
+const (
+	// ReachabilityUnknown indicates that the reachability status of the
+	// node is unknown.
+	ReachabilityUnknown = iota
+
+	// ReachabilityPublic indicates that the node is reachable from the
+	// public internet.
+	ReachabilityPublic
+
+	// ReachabilityPrivate indicates that the node is not reachable from the
+	// public internet.
+	//
+	// NOTE: This node may _still_ be reachable via relays.
+	ReachabilityPrivate
+)
+
 // Stat stores metadata pertaining to a given Stream/Conn.
 type Stat struct {
 	Direction Direction