// 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 ( "runtime" "syscall" "time" ) // syscall.TCP_KEEPINTVL is missing on some darwin architectures. const sysTCP_KEEPINTVL = 0x101 func setKeepAlivePeriod(fd *netFD, d time.Duration) error { // The kernel expects seconds so round to next highest second. secs := int(roundDurationUp(d, time.Second)) if err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, sysTCP_KEEPINTVL, secs); err != nil { return wrapSyscallError("setsockopt", err) } err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, syscall.TCP_KEEPALIVE, secs) runtime.KeepAlive(fd) return wrapSyscallError("setsockopt", err) }