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https://github.com/golang/go
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0e3514eaac
This CL changes default SOL_SOCKET settings to mitigate connect failure on OpenBSD or similar platforms which support randomized transport protocol port number assignment. Fixes #2830. R=rsc, jsing CC=golang-dev https://golang.org/cl/5648044
47 lines
1.2 KiB
Go
47 lines
1.2 KiB
Go
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Socket options for Linux
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package net
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import (
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"os"
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"syscall"
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)
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func setDefaultSockopts(s, f, t int) error {
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switch f {
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case syscall.AF_INET6:
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// Allow both IP versions even if the OS default is otherwise.
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// Note that some operating systems never admit this option.
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syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, 0)
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}
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// Allow broadcast.
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err := syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_BROADCAST, 1)
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if err != nil {
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return os.NewSyscallError("setsockopt", err)
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}
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return nil
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}
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func setDefaultListenerSockopts(s int) error {
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// Allow reuse of recently-used addresses.
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err := syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1)
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if err != nil {
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return os.NewSyscallError("setsockopt", err)
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}
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return nil
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}
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func setDefaultMulticastSockopts(s int) error {
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// Allow multicast UDP and raw IP datagram sockets to listen
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// concurrently across multiple listeners.
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err := syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1)
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if err != nil {
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return os.NewSyscallError("setsockopt", err)
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}
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return nil
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}
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