Retro68/gcc/libgo/go/net/sock_linux.go
2017-10-07 02:16:47 +02:00

32 lines
644 B
Go

// 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 "syscall"
func maxListenerBacklog() int {
fd, err := open("/proc/sys/net/core/somaxconn")
if err != nil {
return syscall.SOMAXCONN
}
defer fd.close()
l, ok := fd.readLine()
if !ok {
return syscall.SOMAXCONN
}
f := getFields(l)
n, _, ok := dtoi(f[0])
if n == 0 || !ok {
return syscall.SOMAXCONN
}
// Linux stores the backlog in a uint16.
// Truncate number to avoid wrapping.
// See issue 5030.
if n > 1<<16-1 {
n = 1<<16 - 1
}
return n
}