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
|
/*
* Copyright (c) Contributors, http://opensimulator.org/
* See CONTRIBUTORS.TXT for a full list of copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the OpenSim Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
using System;
using System.Net;
using System.Net.Sockets;
using System.Threading;
namespace OpenSim.ApplicationPlugins.LoadBalancer {
public class AsynchronousClient {
private static ManualResetEvent connectDone = new ManualResetEvent(false);
private static ManualResetEvent sendDone = new ManualResetEvent(false);
public static Socket StartClient(string hostname, int port) {
try {
IPHostEntry ipHostInfo = Dns.GetHostEntry(hostname);
IPAddress ipAddress = ipHostInfo.AddressList[0];
IPEndPoint remoteEP = new IPEndPoint(ipAddress, port);
Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
client.BeginConnect( remoteEP, new AsyncCallback(ConnectCallback), client);
connectDone.WaitOne();
/*
Send(client,"This is a test<EOF>");
sendDone.WaitOne();
Receive(client);
receiveDone.WaitOne();
client.Shutdown(SocketShutdown.Both);
client.Close();
*/
return client;
} catch (Exception e) {
Console.WriteLine(e.ToString());
throw new Exception("socket error !!");
}
}
private static void ConnectCallback(IAsyncResult ar) {
try {
Socket client = (Socket) ar.AsyncState;
client.EndConnect(ar);
Console.WriteLine("Socket connected to {0}", client.RemoteEndPoint.ToString());
connectDone.Set();
} catch (Exception e) {
Console.WriteLine(e.ToString());
}
}
/*
public static void Receive(Socket client) {
try {
StateObject state = new StateObject();
state.workSocket = client;
client.BeginReceive( state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReceiveCallback), state);
} catch (Exception e) {
Console.WriteLine(e.ToString());
}
}
private static void ReceiveCallback( IAsyncResult ar ) {
try {
StateObject state = (StateObject) ar.AsyncState;
Socket client = state.workSocket;
int bytesRead = client.EndReceive(ar);
if (bytesRead > 0) {
state.sb.Append(Encoding.ASCII.GetString(state.buffer,0,bytesRead));
client.BeginReceive(state.buffer,0,StateObject.BufferSize,0, new AsyncCallback(ReceiveCallback), state);
} else {
if (state.sb.Length > 1) {
response = state.sb.ToString();
}
receiveDone.Set();
}
} catch (Exception e) {
Console.WriteLine(e.ToString());
}
}
*/
public static void Send(Socket client, byte[] byteData) {
client.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), client);
}
private static void SendCallback(IAsyncResult ar) {
try {
Socket client = (Socket) ar.AsyncState;
int bytesSent = client.EndSend(ar);
if(bytesSent > 0)
{
//Console.WriteLine("Sent {0} bytes to server.", bytesSent);
}
sendDone.Set();
} catch (Exception e) {
Console.WriteLine(e.ToString());
}
}
}
public class InternalPacketHeader
{
private byte[] buffer = new byte[32];
public int type;
public int throttlePacketType;
public int numbytes;
public Guid agent_id;
public int region_port;
public void FromBytes(byte[] bytes)
{
int i = 0; // offset
try
{
this.type = (int)(bytes[i++] + (bytes[i++] << 8) + (bytes[i++] << 16) + (bytes[i++] << 24));
this.throttlePacketType = (int)(bytes[i++] + (bytes[i++] << 8) + (bytes[i++] << 16) + (bytes[i++] << 24));
this.numbytes = (int)(bytes[i++] + (bytes[i++] << 8) + (bytes[i++] << 16) + (bytes[i++] << 24));
this.agent_id = new Guid(
bytes[i++] | (bytes[i++] << 8) | (bytes[i++] << 16) | bytes[i++] << 24,
(short)(bytes[i++] | (bytes[i++] << 8)),
(short)(bytes[i++] | (bytes[i++] << 8)),
bytes[i++], bytes[i++], bytes[i++], bytes[i++],
bytes[i++], bytes[i++], bytes[i++], bytes[i++]);
this.region_port = (int)(bytes[i++] + (bytes[i++] << 8) + (bytes[i++] << 16) + (bytes[i++] << 24));
}
catch (Exception)
{
throw new Exception("bad format!!!");
}
}
public byte[] ToBytes()
{
int i = 0;
this.buffer[i++] = (byte)(this.type % 256);
this.buffer[i++] = (byte)((this.type >> 8) % 256);
this.buffer[i++] = (byte)((this.type >> 16) % 256);
this.buffer[i++] = (byte)((this.type >> 24) % 256);
this.buffer[i++] = (byte)(this.throttlePacketType % 256);
this.buffer[i++] = (byte)((this.throttlePacketType >> 8) % 256);
this.buffer[i++] = (byte)((this.throttlePacketType >> 16) % 256);
this.buffer[i++] = (byte)((this.throttlePacketType >> 24) % 256);
this.buffer[i++] = (byte)(this.numbytes % 256);
this.buffer[i++] = (byte)((this.numbytes >> 8) % 256);
this.buffer[i++] = (byte)((this.numbytes >> 16) % 256);
this.buffer[i++] = (byte)((this.numbytes >> 24) % 256);
// no endian care
Buffer.BlockCopy(agent_id.ToByteArray(), 0, this.buffer, i, 16); i += 16;
this.buffer[i++] = (byte)(this.region_port % 256);
this.buffer[i++] = (byte)((this.region_port >> 8) % 256);
this.buffer[i++] = (byte)((this.region_port >> 16) % 256);
this.buffer[i++] = (byte)((this.region_port >> 24) % 256);
return this.buffer;
}
}
public class TcpClient {
public static int internalPacketHeaderSize = 4*4 + 16*1;
private string mHostname;
private int mPort;
private Socket mConnection;
public TcpClient(string hostname, int port) {
this.mHostname = hostname;
this.mPort = port;
this.mConnection = null;
}
public void connect() {
this.mConnection = AsynchronousClient.StartClient(mHostname, mPort);
}
/*
public void recevie() {
if (mConnection == null) {
throw new Exception("client not initialized");
}
try
{
AsynchronousClient.Receive(this.mConnection);
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
mConnection = null;
}
}
*/
public void send(InternalPacketHeader header, byte[] packet) {
lock (this)
{
if (mConnection == null) {
// throw new Exception("client not initialized");
connect();
}
AsynchronousClient.Send(this.mConnection, header.ToBytes());
/*
for (int i = 0; i < 10; i++)
{
Console.Write(packet[i] + " ");
}
Console.WriteLine("");
*/
AsynchronousClient.Send(this.mConnection, packet);
}
}
}
}
|
