tailscale/net/netknob/netknob.go

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// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package netknob has Tailscale network knobs.
package netknob
import (
"runtime"
"time"
)
// PlatformTCPKeepAlive returns the default net.Dialer.KeepAlive
// value for the current runtime.GOOS.
func PlatformTCPKeepAlive() time.Duration {
switch runtime.GOOS {
case "ios", "android":
// Disable TCP keep-alives on mobile platforms.
// See https://github.com/golang/go/issues/48622.
//
// TODO(bradfitz): in 1.17.x, try disabling TCP
// keep-alives on for all platforms.
return -1
}
// Otherwise, default to 30 seconds, which is mostly what we
// used to do. In some places we used the zero value, which Go
// defaults to 15 seconds. But 30 seconds is fine.
return 30 * time.Second
}