aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/ThirdParty/3Di/LoadBalancer/TcpServer.cs
blob: 4e651b684e6aab0bea89d54c36835f65d39c0c52 (plain)
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
/*
 * 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.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Runtime.Serialization.Formatters.Binary;

using OpenSim.Framework.Console;

namespace OpenSim.ApplicationPlugins.LoadBalancer {

    public class StateObject {
        public Socket workSocket = null;
        public const int BufferSize = 2048;
        public byte[] buffer = new byte[BufferSize];
        public MemoryStream ms_ptr = new MemoryStream();
        public InternalPacketHeader header = null;
    }

    public class AsynchronousSocketListener {
        public static string data = null;
        public static ManualResetEvent allDone = new ManualResetEvent(false);

#region KIRYU
        public delegate void PacketRecieveHandler(InternalPacketHeader header, byte[] buff);
        public static PacketRecieveHandler PacketHandler = null;
#endregion

        public AsynchronousSocketListener() { }

        public static void StartListening(int port) {
            IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
            IPAddress ipAddress = ipHostInfo.AddressList[0];
            IPEndPoint localEndPoint = new IPEndPoint(ipAddress, port);

            Socket listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp );
            try {
                listener.Bind(localEndPoint);
                listener.Listen(100);
                while (true) {
                    allDone.Reset();
                    listener.BeginAccept( new AsyncCallback(AcceptCallback), listener );
                    allDone.WaitOne();
                }
            } catch (Exception e) {
                Console.WriteLine(e.ToString());
            }
            /*
              Console.WriteLine("\nPress ENTER to continue...");
              Console.Read();
            */
        }

        public static void AcceptCallback(IAsyncResult ar) {
            allDone.Set();
            Socket listener = (Socket) ar.AsyncState;
            Socket handler = listener.EndAccept(ar);
            StateObject state = new StateObject();
            state.workSocket = handler;
            handler.BeginReceive( state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state);
        }

        public static void ReadCallback(IAsyncResult ar) {
            String content = String.Empty;
            StateObject state = (StateObject) ar.AsyncState;
            Socket handler = state.workSocket;

            try
            {
                int bytesRead = handler.EndReceive(ar);
                
                //MainLog.Instance.Verbose("TCPSERVER", "Received packet [{0}]", bytesRead);

                if (bytesRead > 0) {
                    state.ms_ptr.Write(state.buffer, 0, bytesRead);
                }
                else
                {        
                    //MainLog.Instance.Verbose("TCPSERVER", "Connection terminated");
                    return;
                }

                long rest_size = state.ms_ptr.Length;
                long current_pos = 0;
                while (rest_size > TcpClient.internalPacketHeaderSize) {

                    if ((state.header == null) && (rest_size >= TcpClient.internalPacketHeaderSize))
                    {
                        //MainLog.Instance.Verbose("TCPSERVER", "Processing header");

                        // reading header
                        state.header = new InternalPacketHeader();

                        byte[] headerbytes = new byte[TcpClient.internalPacketHeaderSize];
                        state.ms_ptr.Position = current_pos;
                        state.ms_ptr.Read(headerbytes, 0, TcpClient.internalPacketHeaderSize);
                        state.ms_ptr.Seek(0, SeekOrigin.End);
                        state.header.FromBytes(headerbytes);
                    }

                    if ((state.header != null) && (rest_size >= state.header.numbytes + TcpClient.internalPacketHeaderSize))
                    {
                        //MainLog.Instance.Verbose("TCPSERVER", "Processing body");

                        // reading body 
                        byte[] packet = new byte[state.header.numbytes];
                        state.ms_ptr.Position = current_pos + TcpClient.internalPacketHeaderSize;
                        state.ms_ptr.Read(packet, 0, state.header.numbytes);

/*
                        for(int i=0; i<state.header.numbytes; i++) {
                            System.Console.Write(packet[i] + " ");
                        }
                        System.Console.WriteLine();
*/
                        
                        state.ms_ptr.Seek(0, SeekOrigin.End);
                        // call loadbarancer function
                        if (PacketHandler != null)
                        {
                            //MainLog.Instance.Verbose("TCPSERVER", "calling PacketHandler");
                            PacketHandler(state.header, packet);
                        }
                        else
                        {
                            //MainLog.Instance.Verbose("TCPSERVER", "PacketHandler not found");
                        }

                        int read_size = state.header.numbytes + TcpClient.internalPacketHeaderSize;
                        state.header = null;

                        rest_size -= read_size;
                        current_pos += read_size;

                        if (rest_size < TcpClient.internalPacketHeaderSize) {
                            
                            byte[] rest_bytes = new byte[rest_size];
                            state.ms_ptr.Position = read_size;
                            state.ms_ptr.Read(rest_bytes, 0, (int)rest_size);
                            state.ms_ptr.Close();
                            state.ms_ptr = new MemoryStream();
                            state.ms_ptr.Write(rest_bytes, 0, (int)rest_size);
                            break;
                        }
                    }

                } // while (true)

            }
            catch (Exception e)
            {
                //MainLog.Instance.Verbose("TCPSERVER", e.ToString());
                //MainLog.Instance.Verbose("TCPSERVER", e.StackTrace);
            }

            handler.BeginReceive( state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state);
        }
        
        private static void Send(Socket handler, String data) {
            byte[] byteData = Encoding.ASCII.GetBytes(data);
            handler.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), handler);
        }

        private static void SendCallback(IAsyncResult ar) {
            try {
                Socket handler = (Socket) ar.AsyncState;
                int bytesSent = handler.EndSend(ar);
                //Console.WriteLine("Sent {0} bytes to client.", bytesSent);
                handler.Shutdown(SocketShutdown.Both);
                handler.Close();
            } catch (Exception e) {
                Console.WriteLine(e.ToString());
            }
        }
    }

    public class TcpServer {
        private int mPort = 11000;
        public TcpServer() {
        }
        public TcpServer(int port) {
            mPort = port;
        }
        public void start() {
            AsynchronousSocketListener.StartListening(mPort);
        }
    }
}