1//
2// Copyright (C) 2014 The Android Open Source Project
3//
4// Licensed under the Apache License, Version 2.0 (the "License");
5// you may not use this file except in compliance with the License.
6// You may obtain a copy of the License at
7//
8//      http://www.apache.org/licenses/LICENSE-2.0
9//
10// Unless required by applicable law or agreed to in writing, software
11// distributed under the License is distributed on an "AS IS" BASIS,
12// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13// See the License for the specific language governing permissions and
14// limitations under the License.
15//
16
17#ifndef SHILL_NET_NDISC_H_
18#define SHILL_NET_NDISC_H_
19
20// Neighbor discovery related definitions. This is needed because kernel
21// currently does not export these definitions to the user space.
22
23// Netlink multicast group for neighbor discovery user option message.
24#define RTMGRP_ND_USEROPT 0x80000
25
26// Neighbor Discovery user option header definition.
27struct NDUserOptionHeader {
28  NDUserOptionHeader() {
29    memset(this, 0, sizeof(*this));
30  }
31  uint8_t type;
32  uint8_t length;
33  uint16_t reserved;
34  uint32_t lifetime;
35} __attribute__((__packed__));
36
37// Neighbor Discovery user option type definition.
38#define ND_OPT_RDNSS 25       /* RFC 5006 */
39#define ND_OPT_DNSSL 31       /* RFC 6106 */
40
41// Infinity lifetime.
42#define ND_OPT_LIFETIME_INFINITY 0xFFFFFFFF
43
44#endif  // SHILL_NET_NDISC_H_
45