vendor/golang.org/x/net/ipv6/sys_ssmreq.go

   1 // Copyright 2014 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 linux solaris
   6
   7 package ipv6
   8
   9 import (
  10         "net"
  11         "unsafe"
  12
  13         "golang.org/x/net/internal/socket"
  14 )
  15
  16 var freebsd32o64 bool
  17
  18 func (so *sockOpt) setGroupReq(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
  19         var gr groupReq
  20         if ifi != nil {
  21                 gr.Interface = uint32(ifi.Index)
  22         }
  23         gr.setGroup(grp)
  24         var b []byte
  25         if freebsd32o64 {
  26                 var d [sizeofGroupReq + 4]byte
  27                 s := (*[sizeofGroupReq]byte)(unsafe.Pointer(&gr))
  28                 copy(d[:4], s[:4])
  29                 copy(d[8:], s[4:])
  30                 b = d[:]
  31         } else {
  32                 b = (*[sizeofGroupReq]byte)(unsafe.Pointer(&gr))[:sizeofGroupReq]
  33         }
  34         return so.Set(c, b)
  35 }
  36
  37 func (so *sockOpt) setGroupSourceReq(c *socket.Conn, ifi *net.Interface, grp, src net.IP) error {
  38         var gsr groupSourceReq
  39         if ifi != nil {
  40                 gsr.Interface = uint32(ifi.Index)
  41         }
  42         gsr.setSourceGroup(grp, src)
  43         var b []byte
  44         if freebsd32o64 {
  45                 var d [sizeofGroupSourceReq + 4]byte
  46                 s := (*[sizeofGroupSourceReq]byte)(unsafe.Pointer(&gsr))
  47                 copy(d[:4], s[:4])
  48                 copy(d[8:], s[4:])
  49                 b = d[:]
  50         } else {
  51                 b = (*[sizeofGroupSourceReq]byte)(unsafe.Pointer(&gsr))[:sizeofGroupSourceReq]
  52         }
  53         return so.Set(c, b)
  54 }