// 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. //go:build aix || darwin || dragonfly || freebsd || netbsd || openbsd || solaris // +build aix darwin dragonfly freebsd netbsd openbsd solaris package net import ( "runtime" "syscall" ) func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error { ip, err := interfaceToIPv4Addr(ifi) if err != nil { return wrapSyscallError("setsockopt", err) } var a [4]byte copy(a[:], ip.To4()) err = fd.pfd.SetsockoptInet4Addr(syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, a) runtime.KeepAlive(fd) return wrapSyscallError("setsockopt", err) } func setIPv4MulticastLoopback(fd *netFD, v bool) error { err := fd.pfd.SetsockoptByte(syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, byte(boolint(v))) runtime.KeepAlive(fd) return wrapSyscallError("setsockopt", err) }