Source file src/net/sockoptip_bsdvar.go

     1	// Copyright 2011 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	// +build aix darwin dragonfly freebsd netbsd openbsd solaris
     6	
     7	package net
     8	
     9	import (
    10		"runtime"
    11		"syscall"
    12	)
    13	
    14	func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
    15		ip, err := interfaceToIPv4Addr(ifi)
    16		if err != nil {
    17			return wrapSyscallError("setsockopt", err)
    18		}
    19		var a [4]byte
    20		copy(a[:], ip.To4())
    21		err = fd.pfd.SetsockoptInet4Addr(syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, a)
    22		runtime.KeepAlive(fd)
    23		return wrapSyscallError("setsockopt", err)
    24	}
    25	
    26	func setIPv4MulticastLoopback(fd *netFD, v bool) error {
    27		err := fd.pfd.SetsockoptByte(syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, byte(boolint(v)))
    28		runtime.KeepAlive(fd)
    29		return wrapSyscallError("setsockopt", err)
    30	}
    31	

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