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Source file src/net/tcpsockopt_solaris.go

Documentation: net

  // Copyright 2015 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"
  )
  
  func setKeepAlivePeriod(fd *netFD, d time.Duration) error {
  	// The kernel expects milliseconds so round to next highest
  	// millisecond.
  	d += (time.Millisecond - time.Nanosecond)
  	msecs := int(d / time.Millisecond)
  
  	// Normally we'd do
  	//	syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, secs)
  	// here, but we can't because Solaris does not have TCP_KEEPINTVL.
  	// Solaris has TCP_KEEPALIVE_ABORT_THRESHOLD, but it's not the same
  	// thing, it refers to the total time until aborting (not between
  	// probes), and it uses an exponential backoff algorithm instead of
  	// waiting the same time between probes. We can't hope for the best
  	// and do it anyway, like on Darwin, because Solaris might eventually
  	// allocate a constant with a different meaning for the value of
  	// TCP_KEEPINTVL on illumos.
  
  	err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, syscall.TCP_KEEPALIVE_THRESHOLD, msecs)
  	runtime.KeepAlive(fd)
  	return wrapSyscallError("setsockopt", err)
  }
  

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