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
5package ipv4
6
7import "golang.org/x/net/internal/socket"
8
9// Sticky socket options
10const (
11	ssoTOS                = iota // header field for unicast packet
12	ssoTTL                       // header field for unicast packet
13	ssoMulticastTTL              // header field for multicast packet
14	ssoMulticastInterface        // outbound interface for multicast packet
15	ssoMulticastLoopback         // loopback for multicast packet
16	ssoReceiveTTL                // header field on received packet
17	ssoReceiveDst                // header field on received packet
18	ssoReceiveInterface          // inbound interface on received packet
19	ssoPacketInfo                // incbound or outbound packet path
20	ssoHeaderPrepend             // ipv4 header prepend
21	ssoStripHeader               // strip ipv4 header
22	ssoICMPFilter                // icmp filter
23	ssoJoinGroup                 // any-source multicast
24	ssoLeaveGroup                // any-source multicast
25	ssoJoinSourceGroup           // source-specific multicast
26	ssoLeaveSourceGroup          // source-specific multicast
27	ssoBlockSourceGroup          // any-source or source-specific multicast
28	ssoUnblockSourceGroup        // any-source or source-specific multicast
29	ssoAttachFilter              // attach BPF for filtering inbound traffic
30)
31
32// Sticky socket option value types
33const (
34	ssoTypeIPMreq = iota + 1
35	ssoTypeIPMreqn
36	ssoTypeGroupReq
37	ssoTypeGroupSourceReq
38)
39
40// A sockOpt represents a binding for sticky socket option.
41type sockOpt struct {
42	socket.Option
43	typ int // hint for option value type; optional
44}
45