blob: f15e589dc058488850533a8ff510a9901cde149b [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 {
// The kernel expects milliseconds so round to next highest
// millisecond.
msecs := int(roundDurationUp(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.
err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, syscall.TCP_KEEPALIVE_THRESHOLD, msecs)
return wrapSyscallError("setsockopt", err)