1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.net.module.util.structs;
import com.android.net.module.util.Struct;
import com.android.net.module.util.Struct.Field;
import com.android.net.module.util.Struct.Type;
/**
* ICMPv6 Router Advertisement header, follow [Icmpv6Header], as per
* https://tools.ietf.org/html/rfc4861. This does not contain any option.
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Type | Code | Checksum |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Cur Hop Limit |M|O| Reserved | Router Lifetime |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Reachable Time |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Retrans Timer |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Options ...
* +-+-+-+-+-+-+-+-+-+-+-+-
*/
public class RaHeader extends Struct {
@Field(order = 0, type = Type.S8)
public final byte hopLimit;
// "Managed address configuration", "Other configuration" bits, and 6 reserved bits
@Field(order = 1, type = Type.S8)
public final byte flags;
@Field(order = 2, type = Type.U16)
public final int lifetime;
@Field(order = 3, type = Type.U32)
public final long reachableTime;
@Field(order = 4, type = Type.U32)
public final long retransTimer;
public RaHeader(final byte hopLimit, final byte flags, final int lifetime,
final long reachableTime, final long retransTimer) {
this.hopLimit = hopLimit;
this.flags = flags;
this.lifetime = lifetime;
this.reachableTime = reachableTime;
this.retransTimer = retransTimer;
}
}
|
