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 darwin dragonfly freebsd netbsd openbsd 6 7 package net 8 9 import ( 10 "os" 11 "syscall" 12 ) 13 14 func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error { 15 ip, err := interfaceToIPv4Addr(ifi) 16 if err != nil { 17 return os.NewSyscallError("setsockopt", err) 18 } 19 var a [4]byte 20 copy(a[:], ip.To4()) 21 if err := fd.incref(); err != nil { 22 return err 23 } 24 defer fd.decref() 25 return os.NewSyscallError("setsockopt", syscall.SetsockoptInet4Addr(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, a)) 26 } 27 28 func setIPv4MulticastLoopback(fd *netFD, v bool) error { 29 if err := fd.incref(); err != nil { 30 return err 31 } 32 defer fd.decref() 33 return os.NewSyscallError("setsockopt", syscall.SetsockoptByte(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, byte(boolint(v)))) 34 } 35
