David K. Bainbridge | 215e024 | 2017-09-05 23:18:24 -0700 | [diff] [blame] | 1 | // Copyright 2013 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 linux netbsd openbsd solaris windows |
| 6 | |
| 7 | package ipv6 |
| 8 | |
| 9 | import ( |
| 10 | "net" |
| 11 | "unsafe" |
| 12 | |
| 13 | "golang.org/x/net/bpf" |
| 14 | "golang.org/x/net/internal/socket" |
| 15 | ) |
| 16 | |
| 17 | func (so *sockOpt) getMulticastInterface(c *socket.Conn) (*net.Interface, error) { |
| 18 | n, err := so.GetInt(c) |
| 19 | if err != nil { |
| 20 | return nil, err |
| 21 | } |
| 22 | return net.InterfaceByIndex(n) |
| 23 | } |
| 24 | |
| 25 | func (so *sockOpt) setMulticastInterface(c *socket.Conn, ifi *net.Interface) error { |
| 26 | var n int |
| 27 | if ifi != nil { |
| 28 | n = ifi.Index |
| 29 | } |
| 30 | return so.SetInt(c, n) |
| 31 | } |
| 32 | |
| 33 | func (so *sockOpt) getICMPFilter(c *socket.Conn) (*ICMPFilter, error) { |
| 34 | b := make([]byte, so.Len) |
| 35 | n, err := so.Get(c, b) |
| 36 | if err != nil { |
| 37 | return nil, err |
| 38 | } |
| 39 | if n != sizeofICMPv6Filter { |
| 40 | return nil, errOpNoSupport |
| 41 | } |
| 42 | return (*ICMPFilter)(unsafe.Pointer(&b[0])), nil |
| 43 | } |
| 44 | |
| 45 | func (so *sockOpt) setICMPFilter(c *socket.Conn, f *ICMPFilter) error { |
| 46 | b := (*[sizeofICMPv6Filter]byte)(unsafe.Pointer(f))[:sizeofICMPv6Filter] |
| 47 | return so.Set(c, b) |
| 48 | } |
| 49 | |
| 50 | func (so *sockOpt) getMTUInfo(c *socket.Conn) (*net.Interface, int, error) { |
| 51 | b := make([]byte, so.Len) |
| 52 | n, err := so.Get(c, b) |
| 53 | if err != nil { |
| 54 | return nil, 0, err |
| 55 | } |
| 56 | if n != sizeofIPv6Mtuinfo { |
| 57 | return nil, 0, errOpNoSupport |
| 58 | } |
| 59 | mi := (*ipv6Mtuinfo)(unsafe.Pointer(&b[0])) |
| 60 | if mi.Addr.Scope_id == 0 { |
| 61 | return nil, int(mi.Mtu), nil |
| 62 | } |
| 63 | ifi, err := net.InterfaceByIndex(int(mi.Addr.Scope_id)) |
| 64 | if err != nil { |
| 65 | return nil, 0, err |
| 66 | } |
| 67 | return ifi, int(mi.Mtu), nil |
| 68 | } |
| 69 | |
| 70 | func (so *sockOpt) setGroup(c *socket.Conn, ifi *net.Interface, grp net.IP) error { |
| 71 | switch so.typ { |
| 72 | case ssoTypeIPMreq: |
| 73 | return so.setIPMreq(c, ifi, grp) |
| 74 | case ssoTypeGroupReq: |
| 75 | return so.setGroupReq(c, ifi, grp) |
| 76 | default: |
| 77 | return errOpNoSupport |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | func (so *sockOpt) setSourceGroup(c *socket.Conn, ifi *net.Interface, grp, src net.IP) error { |
| 82 | return so.setGroupSourceReq(c, ifi, grp, src) |
| 83 | } |
| 84 | |
| 85 | func (so *sockOpt) setBPF(c *socket.Conn, f []bpf.RawInstruction) error { |
| 86 | return so.setAttachFilter(c, f) |
| 87 | } |