Repository navigation
Expand file tree
/
Copy pathSocketContext.cs
More file actions
307 lines (251 loc) · 6.37 KB
/
Copy pathSocketContext.cs
File metadata and controls
307 lines (251 loc) · 6.37 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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Threading;
namespace NetcodeIO.NET.Utils.IO
{
internal interface ISocketContext : IDisposable
{
int BoundPort { get; }
void Close();
void Bind(EndPoint endpoint);
void SendTo(byte[] data, EndPoint remoteEP);
void SendTo(byte[] data, int length, EndPoint remoteEP);
bool Read(out Datagram packet);
void Pump();
}
internal class UDPSocketContext : ISocketContext
{
public int BoundPort
{
get
{
return ((IPEndPoint)internalSocket.LocalEndPoint).Port;
}
}
private Socket internalSocket;
private Thread socketThread;
private DatagramQueue datagramQueue;
public UDPSocketContext(AddressFamily addressFamily)
{
datagramQueue = new DatagramQueue(addressFamily == AddressFamily.InterNetwork ? IPAddress.Any : IPAddress.IPv6Any);
internalSocket = new Socket(addressFamily, SocketType.Dgram, ProtocolType.Udp);
}
public void Bind(EndPoint endpoint)
{
internalSocket.Bind(endpoint);
socketThread = new Thread(runSocket);
socketThread.Start();
}
public void SendTo(byte[] data, EndPoint remoteEP)
{
internalSocket.SendTo(data, remoteEP);
}
public void SendTo(byte[] data, int length, EndPoint remoteEP)
{
internalSocket.SendTo(data, length, SocketFlags.None, remoteEP);
}
public void Pump()
{
}
public bool Read(out Datagram packet)
{
if (datagramQueue.Count > 0)
{
packet = datagramQueue.Dequeue();
return true;
}
packet = new Datagram();
return false;
}
public void Close()
{
internalSocket.Close();
}
public void Dispose()
{
Close();
}
private void runSocket()
{
while (true)
{
try
{
datagramQueue.ReadFrom(internalSocket);
}
catch (Exception e)
{
if (e is SocketException)
{
var socketException = e as SocketException;
if (socketException.SocketErrorCode == SocketError.ConnectionReset) continue;
}
return;
}
}
}
}
internal class NetworkSimulatorSocketManager
{
public int LatencyMS = 0;
public int JitterMS = 0;
public int PacketLossChance = 0;
public int DuplicatePacketChance = 0;
public bool AutoTime = true;
public double Time
{
get
{
if (AutoTime)
return DateTime.Now.GetTotalSeconds();
else
return time;
}
}
private Dictionary<EndPoint, NetworkSimulatorSocketContext> sockets = new Dictionary<EndPoint, NetworkSimulatorSocketContext>();
private double time;
public void Update(double time)
{
this.time = time;
}
public NetworkSimulatorSocketContext CreateContext(EndPoint endpoint)
{
var socket = new NetworkSimulatorSocketContext();
socket.Manager = this;
return socket;
}
public void ChangeContext(NetworkSimulatorSocketContext socket, EndPoint endpoint)
{
if (sockets.ContainsKey(endpoint))
throw new SocketException();
sockets.Add(endpoint, socket);
}
public void RemoveContext(EndPoint endpoint)
{
sockets.Remove(endpoint);
}
public NetworkSimulatorSocketContext FindContext(EndPoint endpoint)
{
if (!sockets.ContainsKey(endpoint))
return null;
return sockets[endpoint];
}
}
internal class NetworkSimulatorSocketContext : ISocketContext
{
public int BoundPort
{
get { return ((IPEndPoint)endpoint).Port; }
}
private struct simulatedPacket
{
public double receiveTime;
public byte[] packetData;
public EndPoint sender;
}
public NetworkSimulatorSocketManager Manager;
private EndPoint endpoint;
private List<simulatedPacket> simulatedPackets = new List<simulatedPacket>();
private DatagramQueue datagramQueue = new DatagramQueue(IPAddress.Any);
private object mutex = new object();
private Random rand = new Random();
private bool running = false;
public void Bind(EndPoint endpoint)
{
if (this.endpoint != null && this.endpoint.Equals(endpoint)) return;
this.running = true;
this.endpoint = endpoint;
Manager.ChangeContext(this, this.endpoint);
}
public void SimulateReceive(byte[] packetData, EndPoint sender)
{
if (!running) return;
double receiveTime = Manager.Time;
// add latency+jitter to receive time
receiveTime += (Manager.LatencyMS / 1000.0) + (rand.Next(-Manager.JitterMS, Manager.JitterMS) / 2000.0);
lock (mutex)
{
simulatedPackets.Add(new simulatedPacket()
{
receiveTime = receiveTime,
packetData = packetData,
sender = sender
});
}
}
public void SendTo(byte[] data, EndPoint remoteEP)
{
if (!running) throw new SocketException();
// randomly drop packets
if (rand.Next(100) < Manager.PacketLossChance)
{
return;
}
byte[] temp = new byte[data.Length];
Buffer.BlockCopy(data, 0, temp, 0, data.Length);
var endSocket = Manager.FindContext(remoteEP);
if (endSocket != null)
{
endSocket.SimulateReceive(temp, this.endpoint);
// randomly duplicate packets
if (rand.Next(100) < Manager.DuplicatePacketChance)
endSocket.SimulateReceive(temp, this.endpoint);
}
}
public void SendTo(byte[] data, int length, EndPoint remoteEP)
{
if (!running) throw new SocketException();
byte[] temp = new byte[length];
Buffer.BlockCopy(data, 0, temp, 0, length);
SendTo(temp, remoteEP);
}
public void Pump()
{
if (simulatedPackets.Count > 0)
{
lock (simulatedPackets)
{
// enqueue packets ready to be received
for (int i = 0; i < simulatedPackets.Count; i++)
{
if (Manager.Time >= simulatedPackets[i].receiveTime)
{
var receivePacket = simulatedPackets[i];
simulatedPackets.RemoveAt(i);
byte[] receiveBuffer = BufferPool.GetBuffer(2048);
Buffer.BlockCopy(receivePacket.packetData, 0, receiveBuffer, 0, receivePacket.packetData.Length);
Datagram datagram = new Datagram();
datagram.payload = receiveBuffer;
datagram.payloadSize = receivePacket.packetData.Length;
datagram.sender = receivePacket.sender;
datagramQueue.Enqueue(datagram);
}
}
}
}
}
public bool Read(out Datagram packet)
{
if (datagramQueue.Count > 0)
{
packet = datagramQueue.Dequeue();
return true;
}
packet = new Datagram();
return false;
}
public void Close()
{
running = false;
Manager.RemoveContext(this.endpoint);
}
public void Dispose()
{
Close();
}
}
}