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93c2882a2f
Windows has a public dns.Flush used in router_windows.go. However that won't work for platforms like Linux, where we need a different flush mechanism for resolved versus other implementations. We're instead adding a FlushCaches method to the dns Manager, which can be made to work on all platforms as needed. Fixes https://github.com/tailscale/tailscale/issues/2132 Signed-off-by: Denton Gentry <dgentry@tailscale.com>
29 lines
738 B
Go
29 lines
738 B
Go
// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package dns
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import (
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"fmt"
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"os/exec"
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)
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func flushCaches() error {
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out, err := exec.Command("ipconfig", "/flushdns").CombinedOutput()
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if err != nil {
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return fmt.Errorf("%v (output: %s)", err, out)
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}
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return nil
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}
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// Flush clears the local resolver cache.
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//
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// Only Windows has a public dns.Flush, needed in router_windows.go. Other
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// platforms like Linux need a different flush implementation depending on
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// the DNS manager. There is a FlushCaches method on the manager which
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// can be used on all platforms.
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func Flush() error {
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return flushCaches()
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}
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