Refactor - now wireguard based. (#7)

peer/control/role.go

@@ -0,0 +1,22 @@
+package control
+
+import "net/netip"
+
+// Role identifies a peer's role in a ping exchange with a specific remote peer.
+type Role string
+
+const (
+	// Client initiates pings and measures RTT.
+	Client Role = "CLIENT"
+	// Server responds to pings.
+	Server Role = "SERVER"
+)
+
+// RoleFor returns the Role of local relative to remote.
+// The peer with the lower VPN IP is the client.
+func RoleFor(local, remote netip.Addr) Role {
+	if local.Compare(remote) < 0 {
+		return Client
+	}
+	return Server
+}