Update dependencies

vendor/tailscale.com/net/tstun/fake.go

@@ -0,0 +1,58 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+package tstun
+
+import (
+	"io"
+	"os"
+
+	"github.com/tailscale/wireguard-go/tun"
+)
+
+type fakeTUN struct {
+	evchan    chan tun.Event
+	closechan chan struct{}
+}
+
+// NewFake returns a tun.Device that does nothing.
+func NewFake() tun.Device {
+	return &fakeTUN{
+		evchan:    make(chan tun.Event),
+		closechan: make(chan struct{}),
+	}
+}
+
+func (t *fakeTUN) File() *os.File {
+	panic("fakeTUN.File() called, which makes no sense")
+}
+
+func (t *fakeTUN) Close() error {
+	close(t.closechan)
+	close(t.evchan)
+	return nil
+}
+
+func (t *fakeTUN) Read(out [][]byte, sizes []int, offset int) (int, error) {
+	<-t.closechan
+	return 0, io.EOF
+}
+
+func (t *fakeTUN) Write(b [][]byte, n int) (int, error) {
+	select {
+	case <-t.closechan:
+		return 0, ErrClosed
+	default:
+	}
+	return 1, nil
+}
+
+// FakeTUNName is the name of the fake TUN device.
+const FakeTUNName = "FakeTUN"
+
+func (t *fakeTUN) Flush() error             { return nil }
+func (t *fakeTUN) MTU() (int, error)        { return 1500, nil }
+func (t *fakeTUN) Name() (string, error)    { return FakeTUNName, nil }
+func (t *fakeTUN) Events() <-chan tun.Event { return t.evchan }
+func (t *fakeTUN) BatchSize() int           { return 1 }
+func (t *fakeTUN) IsFakeTun() bool          { return true }