libgo/go/net/sockoptip_bsd.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 darwin 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(false); err != nil {
  22                 return err
  23         }
  24         defer fd.decref()
  25         err = syscall.SetsockoptInet4Addr(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, a)
  26         if err != nil {
  27                 return os.NewSyscallError("setsockopt", err)
  28         }
  29         return nil
  30 }
  31
  32 func setIPv4MulticastLoopback(fd *netFD, v bool) error {
  33         if err := fd.incref(false); err != nil {
  34                 return err
  35         }
  36         defer fd.decref()
  37         err := syscall.SetsockoptByte(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, byte(boolint(v)))
  38         if err != nil {
  39                 return os.NewSyscallError("setsockopt", err)
  40         }
  41         return nil
  42 }