blob: 76285e5d2e566a24ea1b19d43f9fe06423abdd6a [file] [log] [blame]
// Copyright 2015 The Go 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 net
import (
func setKeepAlivePeriod(fd *netFD, d time.Duration) error {
if err := fd.incref(); err != nil {
return err
defer fd.decref()
// The kernel expects milliseconds so round to next highest
// millisecond.
d += (time.Millisecond - time.Nanosecond)
msecs := int(d / time.Millisecond)
// Normally we'd do
// syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, secs)
// here, but we can't because Solaris does not have TCP_KEEPINTVL.
// Solaris has TCP_KEEPALIVE_ABORT_THRESHOLD, but it's not the same
// thing, it refers to the total time until aborting (not between
// probes), and it uses an exponential backoff algorithm instead of
// waiting the same time between probes. We can't hope for the best
// and do it anyway, like on Darwin, because Solaris might eventually
// allocate a constant with a different meaning for the value of
// TCP_KEEPINTVL on illumos.
return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_TCP, syscall.TCP_KEEPALIVE_THRESHOLD, msecs))