tcpsockopt_unix.mx raw

   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  
   7  package net
   8  
   9  import (
  10  	"runtime"
  11  	"syscall"
  12  	"time"
  13  )
  14  
  15  func 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  
  29  func 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  
  43  func 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