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| // Copyright 2009 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 (
| "os"
| "runtime"
| "syscall"
| "time"
| "unsafe"
| )
|
| func setKeepAlivePeriod(fd *netFD, d time.Duration) error {
| // The kernel expects milliseconds so round to next highest
| // millisecond.
| d += (time.Millisecond - time.Nanosecond)
| msecs := uint32(d / time.Millisecond)
| ka := syscall.TCPKeepalive{
| OnOff: 1,
| Time: msecs,
| Interval: msecs,
| }
| ret := uint32(0)
| size := uint32(unsafe.Sizeof(ka))
| err := fd.pfd.WSAIoctl(syscall.SIO_KEEPALIVE_VALS, (*byte)(unsafe.Pointer(&ka)), size, nil, 0, &ret, nil, 0)
| runtime.KeepAlive(fd)
| return os.NewSyscallError("wsaioctl", err)
| }
|
|
