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