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 package net 6 7 import ( 8 "os" 9 "syscall" 10 "time" 11 ) 12 13 func setKeepAlivePeriod(fd *netFD, d time.Duration) error { 14 if err := fd.incref(); err != nil { 15 return err 16 } 17 defer fd.decref() 18 // The kernel expects milliseconds so round to next highest 19 // millisecond. 20 d += (time.Millisecond - time.Nanosecond) 21 msecs := int(d / time.Millisecond) 22 if err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, msecs); err != nil { 23 return os.NewSyscallError("setsockopt", err) 24 } 25 return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_TCP, syscall.TCP_KEEPIDLE, msecs)) 26 } 27
