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//go:build aix || dragonfly || freebsd || illumos || linux || netbsd
6
7package net
8
9import (
10	"runtime"
11	"syscall"
12	"time"
13)
14
15func setKeepAliveIdle(fd *netFD, d time.Duration) error {
16	if d == 0 {
17		d = defaultTCPKeepAliveIdle
18	} else if d < 0 {
19		return nil
20	}
21
22	// The kernel expects seconds so round to next highest second.
23	secs := int(roundDurationUp(d, time.Second))
24	err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, syscall.TCP_KEEPIDLE, secs)
25	runtime.KeepAlive(fd)
26	return wrapSyscallError("setsockopt", err)
27}
28
29func setKeepAliveInterval(fd *netFD, d time.Duration) error {
30	if d == 0 {
31		d = defaultTCPKeepAliveInterval
32	} else if d < 0 {
33		return nil
34	}
35
36	// The kernel expects seconds so round to next highest second.
37	secs := int(roundDurationUp(d, time.Second))
38	err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, secs)
39	runtime.KeepAlive(fd)
40	return wrapSyscallError("setsockopt", err)
41}
42
43func setKeepAliveCount(fd *netFD, n int) error {
44	if n == 0 {
45		n = defaultTCPKeepAliveCount
46	} else if n < 0 {
47		return nil
48	}
49
50	err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, syscall.TCP_KEEPCNT, n)
51	runtime.KeepAlive(fd)
52	return wrapSyscallError("setsockopt", err)
53}
54