1// Copyright 2009 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5// +build freebsd linux netbsd
6
7package net
8
9import (
10	"runtime"
11	"syscall"
12	"time"
13)
14
15func setKeepAlivePeriod(fd *netFD, d time.Duration) error {
16	// The kernel expects seconds so round to next highest second.
17	d += (time.Second - time.Nanosecond)
18	secs := int(d.Seconds())
19	if err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, secs); err != nil {
20		return wrapSyscallError("setsockopt", err)
21	}
22	err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, syscall.TCP_KEEPIDLE, secs)
23	runtime.KeepAlive(fd)
24	return wrapSyscallError("setsockopt", err)
25}
26