// Copyright 2017 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 !darwin,!dragonfly,!freebsd,!netbsd,!openbsd,!solaris,!windowspackageipv4import("net""golang.org/x/net/internal/socket")func(so*sockOpt)setIPMreq(c*socket.Conn,ifi*net.Interface,grpnet.IP)error{returnerrOpNoSupport}func(so*sockOpt)getMulticastIf(c*socket.Conn)(*net.Interface,error){returnnil,errOpNoSupport}func(so*sockOpt)setMulticastIf(c*socket.Conn,ifi*net.Interface)error{returnerrOpNoSupport}