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 "runtime" 9 "syscall" 10 "time" 11 ) 12 13 func setKeepAlivePeriod(fd *netFD, d time.Duration) error { 14 // The kernel expects milliseconds so round to next highest 15 // millisecond. 16 d += (time.Millisecond - time.Nanosecond) 17 msecs := int(d / time.Millisecond) 18 if err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, msecs); err != nil { 19 return wrapSyscallError("setsockopt", err) 20 } 21 err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, syscall.TCP_KEEPIDLE, msecs) 22 runtime.KeepAlive(fd) 23 return wrapSyscallError("setsockopt", err) 24 } 25
