ndisc.h revision 8d6b59704591ba9fad57751858835dc332dbdd37 
1// Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef SHILL_NET_NDISC_H_
6#define SHILL_NET_NDISC_H_
7
8// Neighbor discovery related definitions. This is needed because kernel
9// currently does not export these definitions to the user space.
10
11// Netlink multicast group for neighbor discovery user option message.
12#define RTMGRP_ND_USEROPT 0x80000
13
14// Neighbor Discovery user option header definition.
15struct NDUserOptionHeader {
16  NDUserOptionHeader() {
17    memset(this, 0, sizeof(*this));
18  }
19  uint8_t type;
20  uint8_t length;
21  uint16_t reserved;
22  uint32_t lifetime;
23} __attribute__((__packed__));
24
25// Neighbor Discovery user option type definition.
26#define ND_OPT_RDNSS 25       /* RFC 5006 */
27#define ND_OPT_DNSSL 31       /* RFC 6106 */
28
29// Infinity lifetime.
30#define ND_OPT_LIFETIME_INFINITY 0xFFFFFFFF
31
32#endif  // SHILL_NET_NDISC_H_
33