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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;
using System.Text;
using System.Runtime.Serialization.Formatters.Binary;
namespace OpenSim.ApplicationPlugins.LoadBalancer {
public class AsynchronousClient {
private static ManualResetEvent connectDone = new ManualResetEvent(false);
private static ManualResetEvent sendDone = new ManualResetEvent(false);
private static ManualResetEvent receiveDone = new ManualResetEvent(false);
private static String response = String.Empty;
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);
//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);
}
}
}
}
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