OpenSimMirror/ThirdParty/3Di/LoadBalancer/TcpClient.cs

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/*
* 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.Threading;
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namespace OpenSim.ApplicationPlugins.LoadBalancer
{
public class AsynchronousClient
{
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private static ManualResetEvent connectDone = new ManualResetEvent(false);
private static ManualResetEvent sendDone = new ManualResetEvent(false);
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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);
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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;
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}
catch (Exception e)
{
Console.WriteLine(e.ToString());
throw new Exception("socket error !!");
}
}
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private static void ConnectCallback(IAsyncResult ar)
{
try
{
Socket client = (Socket) ar.AsyncState;
client.EndConnect(ar);
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Console.WriteLine("Socket connected to {0}", client.RemoteEndPoint.ToString());
connectDone.Set();
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}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
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public static void Send(Socket client, byte[] byteData)
{
client.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), client);
}
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private static void SendCallback(IAsyncResult ar)
{
try
{
Socket client = (Socket) ar.AsyncState;
int bytesSent = client.EndSend(ar);
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if (bytesSent > 0)
{
//Console.WriteLine("Sent {0} bytes to server.", bytesSent);
}
sendDone.Set();
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}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
}
public class InternalPacketHeader
{
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public Guid agent_id;
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private byte[] buffer = new byte[32];
public int numbytes;
public int region_port;
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public int throttlePacketType;
public int type;
public void FromBytes(byte[] bytes)
{
MemoryStream memstr = new MemoryStream(bytes);
memstr.Seek(0, SeekOrigin.Begin);
BinaryReader binread = new BinaryReader(memstr);
type = binread.ReadInt32();
throttlePacketType = binread.ReadInt32();
numbytes = binread.ReadInt32();
agent_id = new Guid(binread.ReadBytes(16));
region_port = binread.ReadInt32();
binread.Close();
}
public byte[] ToBytes()
{
int i = 0;
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buffer[i++] = (byte) (type % 256);
buffer[i++] = (byte) ((type >> 8) % 256);
buffer[i++] = (byte) ((type >> 16) % 256);
buffer[i++] = (byte) ((type >> 24) % 256);
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buffer[i++] = (byte) (throttlePacketType % 256);
buffer[i++] = (byte) ((throttlePacketType >> 8) % 256);
buffer[i++] = (byte) ((throttlePacketType >> 16) % 256);
buffer[i++] = (byte) ((throttlePacketType >> 24) % 256);
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buffer[i++] = (byte) (numbytes % 256);
buffer[i++] = (byte) ((numbytes >> 8) % 256);
buffer[i++] = (byte) ((numbytes >> 16) % 256);
buffer[i++] = (byte) ((numbytes >> 24) % 256);
// no endian care
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Buffer.BlockCopy(agent_id.ToByteArray(), 0, buffer, i, 16);
i += 16;
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buffer[i++] = (byte) (region_port % 256);
buffer[i++] = (byte) ((region_port >> 8) % 256);
buffer[i++] = (byte) ((region_port >> 16) % 256);
buffer[i++] = (byte) ((region_port >> 24) % 256);
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return buffer;
}
}
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public class TcpClient
{
public static int internalPacketHeaderSize = 4 * 4 + 16 * 1;
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private Socket mConnection;
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private string mHostname;
private int mPort;
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public TcpClient(string hostname, int port)
{
mHostname = hostname;
mPort = port;
mConnection = null;
}
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public void connect()
{
mConnection = AsynchronousClient.StartClient(mHostname, mPort);
}
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/*
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public void receive()
{
if (mConnection == null)
{
throw new Exception("client not initialized");
}
try
{
AsynchronousClient.Receive(this.mConnection);
}
catch (Exception e)
{
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Console.WriteLine(e.ToString());
mConnection = null;
}
}
*/
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public void send(InternalPacketHeader header, byte[] packet)
{
lock (this)
{
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if (mConnection == null)
{
// throw new Exception("client not initialized");
connect();
}
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AsynchronousClient.Send(mConnection, header.ToBytes());
/*
for (int i = 0; i < 10; i++)
{
Console.Write(packet[i] + " ");
}
Console.WriteLine("");
*/
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AsynchronousClient.Send(mConnection, packet);
}
}
}
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}