David K. Bainbridge | 215e024 | 2017-09-05 23:18:24 -0700 | [diff] [blame] | 1 | // Copyright 2012 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 ipv4 |
| 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 | switch so.typ { |
| 19 | case ssoTypeIPMreqn: |
| 20 | return so.getIPMreqn(c) |
| 21 | default: |
| 22 | return so.getMulticastIf(c) |
| 23 | } |
| 24 | } |
| 25 | |
| 26 | func (so *sockOpt) setMulticastInterface(c *socket.Conn, ifi *net.Interface) error { |
| 27 | switch so.typ { |
| 28 | case ssoTypeIPMreqn: |
| 29 | return so.setIPMreqn(c, ifi, nil) |
| 30 | default: |
| 31 | return so.setMulticastIf(c, ifi) |
| 32 | } |
| 33 | } |
| 34 | |
| 35 | func (so *sockOpt) getICMPFilter(c *socket.Conn) (*ICMPFilter, error) { |
| 36 | b := make([]byte, so.Len) |
| 37 | n, err := so.Get(c, b) |
| 38 | if err != nil { |
| 39 | return nil, err |
| 40 | } |
| 41 | if n != sizeofICMPFilter { |
| 42 | return nil, errOpNoSupport |
| 43 | } |
| 44 | return (*ICMPFilter)(unsafe.Pointer(&b[0])), nil |
| 45 | } |
| 46 | |
| 47 | func (so *sockOpt) setICMPFilter(c *socket.Conn, f *ICMPFilter) error { |
| 48 | b := (*[sizeofICMPFilter]byte)(unsafe.Pointer(f))[:sizeofICMPFilter] |
| 49 | return so.Set(c, b) |
| 50 | } |
| 51 | |
| 52 | func (so *sockOpt) setGroup(c *socket.Conn, ifi *net.Interface, grp net.IP) error { |
| 53 | switch so.typ { |
| 54 | case ssoTypeIPMreq: |
| 55 | return so.setIPMreq(c, ifi, grp) |
| 56 | case ssoTypeIPMreqn: |
| 57 | return so.setIPMreqn(c, ifi, grp) |
| 58 | case ssoTypeGroupReq: |
| 59 | return so.setGroupReq(c, ifi, grp) |
| 60 | default: |
| 61 | return errOpNoSupport |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | func (so *sockOpt) setSourceGroup(c *socket.Conn, ifi *net.Interface, grp, src net.IP) error { |
| 66 | return so.setGroupSourceReq(c, ifi, grp, src) |
| 67 | } |
| 68 | |
| 69 | func (so *sockOpt) setBPF(c *socket.Conn, f []bpf.RawInstruction) error { |
| 70 | return so.setAttachFilter(c, f) |
| 71 | } |