Subversion Repositories openrisc

// 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.

// Sockets for Linux

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], 0)

        if n == 0 || !ok {

                return syscall.SOMAXCONN

        }

        return n

}

func listenerSockaddr(s, f int, la syscall.Sockaddr, toAddr func(syscall.Sockaddr) Addr) (syscall.Sockaddr, error) {

        a := toAddr(la)

        if a == nil {

                return la, nil

        }

        switch v := a.(type) {

        case *UDPAddr:

                if v.IP.IsMulticast() {

                        err := setDefaultMulticastSockopts(s)

                        if err != nil {

                                return nil, err

                        }

                        switch f {

                        case syscall.AF_INET:

                                v.IP = IPv4zero

                        case syscall.AF_INET6:

                                v.IP = IPv6unspecified

                        }

                        return v.sockaddr(f)

                }

        }

        return la, nil

}