Reconcile AllowedIPs from the routes of the interface instead of replaying route events

cmd/app/loop_test.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"testing"
+	"time"
+)
+
+func TestBackoff(t *testing.T) {
+	var b backoff
+	var got []time.Duration
+	for range 8 {
+		got = append(got, b.next())
+	}
+	want := []time.Duration{1, 2, 4, 8, 16, 30, 30, 30}
+	for i := range want {
+		if got[i] != want[i]*time.Second {
+			t.Fatalf("step %d: got %s, want %s", i, got[i], want[i]*time.Second)
+		}
+	}
+
+	b.reset()
+	if d := b.next(); d != minBackoff {
+		t.Errorf("after reset: got %s, want %s", d, minBackoff)
+	}
+}