OpenSimMirror/ThirdParty/3Di/RegionProxy/RegionProxyPlugin.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.Xml;
using System.Text;
using System.Xml.Serialization;
using System.Net.Sockets;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using OpenSim.Framework;
using OpenSim.Framework.Servers;
using OpenSim.Framework.Console;
using Nwc.XmlRpc;
using Mono.Addins;
[assembly:Addin]
[assembly:AddinDependency ("OpenSim", "0.5")]
namespace OpenSim.ApplicationPlugins.RegionProxy
{
/* This module has an interface to OpenSim clients that is constant, and is responsible for relaying
* messages to and from clients to the region objects. Since the region objects can be duplicated and
* moved dynamically, the proxy provides methods for changing and adding regions. If more than one region
* is associated with a client port, then the message will be broadcasted to all those regions.
*
* The client interface port may be blocked. While being blocked, all messages from the clients will be
* stored in the proxy. Once the interface port is unblocked again, all stored messages will be resent
* to the regions. This functionality is used when moving or cloning an region to make sure that no messages
* are sent to the region while it is being reconfigured.
*
* The proxy opens a XmlRpc interface with these public methods:
* - AddPort
* - AddRegion
* - ChangeRegion
* - BlockClientMessages
* - UnblockClientMessages
*/
[Extension("/OpenSim/Startup")]
public class RegionProxyPlugin : IApplicationPlugin
{
private ProxyServer proxy;
private BaseHttpServer command_server;
private static readonly log4net.ILog m_log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
public void Initialise(OpenSimMain openSim)
{
Console.WriteLine("Starting proxy");
string proxyURL = openSim.ConfigSource.Configs["Network"].GetString("proxy_url", "");
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if(proxyURL.Length==0) return;
uint port = (uint) Int32.Parse(proxyURL.Split(new char[] { ':' })[2]);
command_server = new BaseHttpServer(port);
command_server.Start();
command_server.AddXmlRPCHandler("AddPort", AddPort);
command_server.AddXmlRPCHandler("AddRegion", AddRegion);
command_server.AddXmlRPCHandler("DeleteRegion", DeleteRegion);
command_server.AddXmlRPCHandler("ChangeRegion", ChangeRegion);
command_server.AddXmlRPCHandler("BlockClientMessages", BlockClientMessages);
command_server.AddXmlRPCHandler("UnblockClientMessages", UnblockClientMessages);
command_server.AddXmlRPCHandler("Stop", Stop);
proxy=new ProxyServer(m_log);
}
public void Close()
{
}
private XmlRpcResponse Stop(XmlRpcRequest request)
{
try
{
proxy.Stop();
}
catch (Exception e)
{
m_log.Error("[PROXY]" + e.Message);
m_log.Error("[PROXY]" + e.StackTrace);
}
return new XmlRpcResponse();
}
private XmlRpcResponse AddPort(XmlRpcRequest request)
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{
try {
int clientPort = (int) request.Params[0];
int regionPort = (int) request.Params[1];
string regionUrl = (string) request.Params[2];
proxy.AddPort(clientPort, regionPort, regionUrl);
} catch(Exception e) {
m_log.Error("[PROXY]"+e.Message);
m_log.Error("[PROXY]"+e.StackTrace);
}
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return new XmlRpcResponse();
}
private XmlRpcResponse AddRegion(XmlRpcRequest request)
{
try {
int currentRegionPort = (int) request.Params[0];
string currentRegionUrl = (string) request.Params[1];
int newRegionPort = (int) request.Params[2];
string newRegionUrl = (string) request.Params[3];
proxy.AddRegion(currentRegionPort, currentRegionUrl, newRegionPort, newRegionUrl);
} catch(Exception e) {
m_log.Error("[PROXY]"+e.Message);
m_log.Error("[PROXY]"+e.StackTrace);
}
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return new XmlRpcResponse();
}
private XmlRpcResponse ChangeRegion(XmlRpcRequest request)
{
try {
int currentRegionPort = (int) request.Params[0];
string currentRegionUrl = (string) request.Params[1];
int newRegionPort = (int) request.Params[2];
string newRegionUrl = (string) request.Params[3];
proxy.ChangeRegion(currentRegionPort, currentRegionUrl, newRegionPort, newRegionUrl);
} catch(Exception e) {
m_log.Error("[PROXY]"+e.Message);
m_log.Error("[PROXY]"+e.StackTrace);
}
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return new XmlRpcResponse();
}
private XmlRpcResponse DeleteRegion(XmlRpcRequest request)
{
try {
int currentRegionPort = (int) request.Params[0];
string currentRegionUrl = (string) request.Params[1];
proxy.DeleteRegion(currentRegionPort, currentRegionUrl);
} catch(Exception e) {
m_log.Error("[PROXY]"+e.Message);
m_log.Error("[PROXY]"+e.StackTrace);
}
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return new XmlRpcResponse();
}
private XmlRpcResponse BlockClientMessages(XmlRpcRequest request)
{
try {
string regionUrl = (string) request.Params[0];
int regionPort = (int) request.Params[1];
proxy.BlockClientMessages(regionUrl, regionPort);
} catch(Exception e) {
m_log.Error("[PROXY]"+e.Message);
m_log.Error("[PROXY]"+e.StackTrace);
}
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return new XmlRpcResponse();
}
private XmlRpcResponse UnblockClientMessages(XmlRpcRequest request)
{
try {
string regionUrl = (string) request.Params[0];
int regionPort = (int) request.Params[1];
proxy.UnblockClientMessages(regionUrl, regionPort);
} catch(Exception e) {
m_log.Error("[PROXY]"+e.Message);
m_log.Error("[PROXY]"+e.StackTrace);
}
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return new XmlRpcResponse();
}
}
public class ProxyServer {
protected AsyncCallback receivedData;
protected ProxyMap proxy_map = new ProxyMap();
protected readonly log4net.ILog m_log;
protected bool running;
protected class ProxyMap
{
public class RegionData
{
public bool isBlocked = false;
public Queue storedMessages = new Queue();
public List<EndPoint> regions = new List<EndPoint>();
}
private Dictionary<EndPoint, RegionData> map;
public ProxyMap() {
map = new Dictionary<EndPoint, RegionData>();
}
public void Add(EndPoint client, EndPoint region)
{
if(map.ContainsKey(client))
{
map[client].regions.Add(region);
}
else
{
RegionData regions = new RegionData();
map.Add(client, regions);
regions.regions.Add(region);
}
}
public RegionData GetRegionData(EndPoint client)
{
return map[client];
}
public EndPoint GetClient(EndPoint region)
{
foreach (KeyValuePair<EndPoint, RegionData> pair in map)
{
if(pair.Value.regions.Contains(region))
{
return pair.Key;
}
}
return null;
}
}
protected class ServerData {
public Socket server;
public EndPoint clientEP;
public EndPoint senderEP;
public IPEndPoint serverIP;
public byte[] recvBuffer = new byte[4096];
public ServerData()
{
server = null;
}
}
protected class StoredMessage
{
public byte[] buffer;
public int length;
public EndPoint senderEP;
public ServerData sd;
public StoredMessage(byte[] buffer, int length, int maxLength, EndPoint senderEP, ServerData sd)
{
this.buffer = new byte[maxLength];
this.length = length;
for(int i=0; i<length; i++) this.buffer[i]=buffer[i];
this.senderEP = senderEP;
this.sd = sd;
}
}
public ProxyServer(log4net.ILog log)
{
m_log = log;
running=false;
receivedData = new AsyncCallback(OnReceivedData);
}
public void BlockClientMessages(string regionUrl, int regionPort)
{
EndPoint client = proxy_map.GetClient(new IPEndPoint(IPAddress.Parse(regionUrl), regionPort));
ProxyMap.RegionData rd = proxy_map.GetRegionData(client);
rd.isBlocked = true;
}
public void UnblockClientMessages(string regionUrl, int regionPort)
{
EndPoint client = proxy_map.GetClient(new IPEndPoint(IPAddress.Parse(regionUrl), regionPort));
ProxyMap.RegionData rd = proxy_map.GetRegionData(client);
rd.isBlocked = false;
while(rd.storedMessages.Count > 0) {
StoredMessage msg = (StoredMessage) rd.storedMessages.Dequeue();
//m_log.Verbose("[PROXY]"+"Resending blocked message from {0}", msg.senderEP);
SendMessage(msg.buffer, msg.length, msg.senderEP, msg.sd);
}
}
public void AddRegion(int oldRegionPort, string oldRegionUrl, int newRegionPort, string newRegionUrl)
{
//m_log.Verbose("[PROXY]"+"AddRegion {0} {1}", oldRegionPort, newRegionPort);
EndPoint client = proxy_map.GetClient(new IPEndPoint(IPAddress.Parse(oldRegionUrl), oldRegionPort));
ProxyMap.RegionData data = proxy_map.GetRegionData(client);
data.regions.Add(new IPEndPoint(IPAddress.Parse(newRegionUrl), newRegionPort));
}
public void ChangeRegion(int oldRegionPort, string oldRegionUrl, int newRegionPort, string newRegionUrl)
{
//m_log.Verbose("[PROXY]"+"ChangeRegion {0} {1}", oldRegionPort, newRegionPort);
EndPoint client = proxy_map.GetClient(new IPEndPoint(IPAddress.Parse(oldRegionUrl), oldRegionPort));
ProxyMap.RegionData data = proxy_map.GetRegionData(client);
data.regions.Clear();
data.regions.Add(new IPEndPoint(IPAddress.Parse(newRegionUrl), newRegionPort));
}
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public void DeleteRegion(int oldRegionPort, string oldRegionUrl)
{
m_log.InfoFormat("[PROXY]"+"DeleteRegion {0} {1}", oldRegionPort, oldRegionUrl);
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EndPoint regionEP = new IPEndPoint(IPAddress.Parse(oldRegionUrl), oldRegionPort);
EndPoint client = proxy_map.GetClient(regionEP);
ProxyMap.RegionData data = proxy_map.GetRegionData(client);
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data.regions.Remove(regionEP);
}
public void AddPort(int clientPort, int regionPort, string regionUrl)
{
running = true;
//m_log.Verbose("[PROXY]"+"AddPort {0} {1}", clientPort, regionPort);
IPEndPoint clientEP = new IPEndPoint(IPAddress.Parse("127.0.0.1"), clientPort);
proxy_map.Add(clientEP, new IPEndPoint(IPAddress.Parse(regionUrl), regionPort));
ServerData sd = new ServerData();
sd.clientEP = new IPEndPoint(clientEP.Address, clientEP.Port);
OpenPort(sd);
}
protected void OpenPort(ServerData sd)
{
// sd.clientEP must be set before calling this function
ClosePort(sd);
try
{
m_log.InfoFormat("[PROXY] Opening UDP socket on {0}", sd.clientEP);
sd.serverIP = new IPEndPoint(IPAddress.Parse("0.0.0.0"), ((IPEndPoint)sd.clientEP).Port);
sd.server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
sd.server.Bind(sd.serverIP);
sd.senderEP = new IPEndPoint(IPAddress.Parse("0.0.0.0"), 0);
//receivedData = new AsyncCallback(OnReceivedData);
sd.server.BeginReceiveFrom(sd.recvBuffer, 0, sd.recvBuffer.Length, SocketFlags.None, ref sd.senderEP, receivedData, sd);
}
catch (Exception e)
{
m_log.ErrorFormat("[PROXY] Failed to (re)open socket {0}", sd.clientEP);
m_log.Error("[PROXY]" + e.Message);
m_log.Error("[PROXY]" + e.StackTrace);
}
}
protected void ClosePort(ServerData sd)
{
// Close the port if it exists and is open
if (sd.server == null) return;
try
{
sd.server.Shutdown(SocketShutdown.Both);
sd.server.Close();
}
catch (Exception)
{
}
}
public void Stop()
{
running = false;
m_log.InfoFormat("[PROXY] Stopping the proxy server");
}
protected virtual void OnReceivedData(IAsyncResult result)
{
if(!running) return;
ServerData sd = (ServerData)result.AsyncState;
sd.senderEP = new IPEndPoint(IPAddress.Parse("0.0.0.0"), 0);
try
{
int numBytes = sd.server.EndReceiveFrom(result, ref sd.senderEP);
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if (numBytes > 0)
{
SendMessage(sd.recvBuffer, numBytes, sd.senderEP, sd);
}
}
catch (Exception e)
{
// OpenPort(sd); // reopen the port just in case
m_log.ErrorFormat("[PROXY] EndReceiveFrom failed in {0}", sd.clientEP);
m_log.Error("[PROXY]" + e.Message);
m_log.Error("[PROXY]" + e.StackTrace);
}
WaitForNextMessage(sd);
}
protected void WaitForNextMessage(ServerData sd)
{
bool error = true;
while (error)
{
error = false;
try
{
sd.server.BeginReceiveFrom(sd.recvBuffer, 0, sd.recvBuffer.Length, SocketFlags.None, ref sd.senderEP, receivedData, sd);
}
catch (Exception e)
{
error = true;
m_log.ErrorFormat("[PROXY] BeginReceiveFrom failed, retrying... {0}", sd.clientEP);
m_log.Error("[PROXY]" + e.Message);
m_log.Error("[PROXY]" + e.StackTrace);
OpenPort(sd);
}
}
}
protected void SendMessage(byte[] buffer, int length, EndPoint senderEP, ServerData sd)
{
int numBytes = length;
//m_log.ErrorFormat("[PROXY] Got message from {0} in thread {1}, size {2}", senderEP, sd.clientEP, numBytes);
EndPoint client = proxy_map.GetClient(senderEP);
if (client != null)
{
try
{
client = PacketPool.DecodeProxyMessage(buffer, ref numBytes);
try
{
// This message comes from a region object, forward it to the its client
sd.server.SendTo(buffer, numBytes, SocketFlags.None, client);
//m_log.InfoFormat("[PROXY] Sending region message from {0} to {1}, size {2}", senderEP, client, numBytes);
}
catch (Exception e)
{
OpenPort(sd); // reopen the port just in case
m_log.ErrorFormat("[PROXY] Failed sending region message from {0} to {1}", senderEP, client);
m_log.Error("[PROXY]" + e.Message);
m_log.Error("[PROXY]" + e.StackTrace);
return;
}
}
catch (Exception e)
{
OpenPort(sd); // reopen the port just in case
m_log.ErrorFormat("[PROXY] Failed decoding region message from {0}", senderEP);
m_log.Error("[PROXY]" + e.Message);
m_log.Error("[PROXY]" + e.StackTrace);
return;
}
}
else
{
// This message comes from a client object, forward it to the the region(s)
PacketPool.EncodeProxyMessage(buffer, ref numBytes, senderEP);
ProxyMap.RegionData rd = proxy_map.GetRegionData(sd.clientEP);
foreach (EndPoint region in rd.regions)
{
if(rd.isBlocked) {
rd.storedMessages.Enqueue(new StoredMessage(buffer, length, numBytes, senderEP, sd));
}
else
{
try
{
sd.server.SendTo(buffer, numBytes, SocketFlags.None, region);
//m_log.InfoFormat("[PROXY] Sending client message from {0} to {1}", senderEP, region);
}
catch (Exception e)
{
OpenPort(sd); // reopen the port just in case
m_log.ErrorFormat("[PROXY] Failed sending client message from {0} to {1}", senderEP, region);
m_log.Error("[PROXY]" + e.Message);
m_log.Error("[PROXY]" + e.StackTrace);
return;
}
}
}
}
}
}
}