| // 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) |
| } |
