libgo/go/net/tcpsockopt_unix.go

   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 aix freebsd linux netbsd
   6
   7 package net
   8
   9 import (
  10         "runtime"
  11         "syscall"
  12         "time"
  13 )
  14
  15 func 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 }