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31 lines
880 B
Go
31 lines
880 B
Go
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// 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 netknob has Tailscale network knobs.
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package netknob
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import (
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"runtime"
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"time"
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)
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// PlatformTCPKeepAlive returns the default net.Dialer.KeepAlive
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// value for the current runtime.GOOS.
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func PlatformTCPKeepAlive() time.Duration {
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switch runtime.GOOS {
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case "ios", "android":
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// Disable TCP keep-alives on mobile platforms.
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// See https://github.com/golang/go/issues/48622.
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//
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// TODO(bradfitz): in 1.17.x, try disabling TCP
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// keep-alives on for all platforms.
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return -1
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}
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// Otherwise, default to 30 seconds, which is mostly what we
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// used to do. In some places we used the zero value, which Go
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// defaults to 15 seconds. But 30 seconds is fine.
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return 30 * time.Second
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}
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