David K. Bainbridge | 215e024 | 2017-09-05 23:18:24 -0700 | [diff] [blame] | 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 ipv4 |
| 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 | } |