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Index: gcc-6-6.2.1-4.1/src/libgo/go/net/sockopt_gnu.go
===================================================================
--- /dev/null
+++ gcc-6-6.2.1-4.1/src/libgo/go/net/sockopt_gnu.go
@@ -0,0 +1,45 @@
+// Copyright 2011 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.
+
+// +build gnu
+
+package net
+
+import (
+ "os"
+ "syscall"
+)
+
+func setDefaultSockopts(s, family, sotype int, ipv6only bool) error {
+ if family == syscall.AF_INET6 && sotype != syscall.SOCK_RAW {
+ // Allow both IP versions even if the OS default
+ // is otherwise. Note that some operating systems
+ // never admit this option.
+ syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, boolint(ipv6only))
+ }
+ // Allow broadcast.
+ return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_BROADCAST, 1))
+}
+
+func setDefaultListenerSockopts(s int) error {
+ // Allow reuse of recently-used addresses.
+ return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1))
+}
+
+func setDefaultMulticastSockopts(s int) error {
+ // Allow multicast UDP and raw IP datagram sockets to listen
+ // concurrently across multiple listeners.
+ if err := syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1); err != nil {
+ return os.NewSyscallError("setsockopt", err)
+ }
+ // Allow reuse of recently-used ports.
+ // This option is supported only in descendants of 4.4BSD,
+ // to make an effective multicast application that requires
+ // quick draw possible.
+ // Not supported on GNU/Hurd
+ //if syscall.SO_REUSEPORT != 0 {
+ // return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEPORT, 1))
+ //}
+ return nil
+}
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