forked from RevenantX/LiteNetLib
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathNetPacket.cs
More file actions
160 lines (140 loc) · 4.49 KB
/
NetPacket.cs
File metadata and controls
160 lines (140 loc) · 4.49 KB
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
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
using System;
using LiteNetLib.Utils;
namespace LiteNetLib
{
internal enum PacketProperty : byte
{
Unreliable,
Channeled,
Ack,
Ping,
Pong,
ConnectRequest,
ConnectAccept,
Disconnect,
UnconnectedMessage,
MtuCheck,
MtuOk,
Broadcast,
Merged,
ShutdownOk,
PeerNotFound,
InvalidProtocol,
NatMessage,
Empty
}
internal sealed class NetPacket
{
private static readonly int PropertiesCount = Enum.GetValues(typeof(PacketProperty)).Length;
private static readonly int[] HeaderSizes;
static NetPacket()
{
HeaderSizes = NetUtils.AllocatePinnedUninitializedArray<int>(PropertiesCount);
for (int i = 0; i < HeaderSizes.Length; i++)
{
switch ((PacketProperty)i)
{
case PacketProperty.Channeled:
case PacketProperty.Ack:
HeaderSizes[i] = NetConstants.ChanneledHeaderSize;
break;
case PacketProperty.Ping:
HeaderSizes[i] = NetConstants.HeaderSize + 2;
break;
case PacketProperty.ConnectRequest:
HeaderSizes[i] = NetConnectRequestPacket.HeaderSize;
break;
case PacketProperty.ConnectAccept:
HeaderSizes[i] = NetConnectAcceptPacket.Size;
break;
case PacketProperty.Disconnect:
HeaderSizes[i] = NetConstants.HeaderSize + 8;
break;
case PacketProperty.Pong:
HeaderSizes[i] = NetConstants.HeaderSize + 10;
break;
default:
HeaderSizes[i] = NetConstants.HeaderSize;
break;
}
}
}
//Header
public PacketProperty Property
{
get => (PacketProperty)(RawData[0] & 0x1F);
set => RawData[0] = (byte)((RawData[0] & 0xE0) | (byte)value);
}
public byte ConnectionNumber
{
get => (byte)((RawData[0] & 0x60) >> 5);
set => RawData[0] = (byte) ((RawData[0] & 0x9F) | (value << 5));
}
public ushort Sequence
{
get => BitConverter.ToUInt16(RawData, 1);
set => FastBitConverter.GetBytes(RawData, 1, value);
}
public bool IsFragmented => (RawData[0] & 0x80) != 0;
public void MarkFragmented()
{
RawData[0] |= 0x80; //set first bit
}
public byte ChannelId
{
get => RawData[3];
set => RawData[3] = value;
}
public ushort FragmentId
{
get => BitConverter.ToUInt16(RawData, 4);
set => FastBitConverter.GetBytes(RawData, 4, value);
}
public ushort FragmentPart
{
get => BitConverter.ToUInt16(RawData, 6);
set => FastBitConverter.GetBytes(RawData, 6, value);
}
public ushort FragmentsTotal
{
get => BitConverter.ToUInt16(RawData, 8);
set => FastBitConverter.GetBytes(RawData, 8, value);
}
//Data
public byte[] RawData;
public int Size;
//Delivery
public object UserData;
//Pool node
public NetPacket Next;
public NetPacket(int size)
{
RawData = new byte[size];
Size = size;
}
public NetPacket(PacketProperty property, int size)
{
size += GetHeaderSize(property);
RawData = new byte[size];
Property = property;
Size = size;
}
public static int GetHeaderSize(PacketProperty property)
{
return HeaderSizes[(int)property];
}
public int GetHeaderSize()
{
return HeaderSizes[RawData[0] & 0x1F];
}
public bool Verify()
{
byte property = (byte)(RawData[0] & 0x1F);
if (property >= PropertiesCount)
return false;
int headerSize = HeaderSizes[property];
bool fragmented = (RawData[0] & 0x80) != 0;
return Size >= headerSize && (!fragmented || Size >= headerSize + NetConstants.FragmentHeaderSize);
}
}
}