438 lines
16 KiB
C#
438 lines
16 KiB
C#
/*
|
|
Copyright (c) OpenSim project, http://osgrid.org/
|
|
*
|
|
* 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 <organization> 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 <copyright holder> ``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 <copyright holder> 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.Collections;
|
|
using System.Collections.Generic;
|
|
using libsecondlife;
|
|
using libsecondlife.Packets;
|
|
using Nwc.XmlRpc;
|
|
using System.Net;
|
|
using System.Net.Sockets;
|
|
using System.IO;
|
|
using System.Threading;
|
|
using System.Timers;
|
|
using OpenSim.Framework.Interfaces;
|
|
using OpenSim.Framework.Assets;
|
|
using OpenSim.Framework.Inventory;
|
|
using OpenSim.Framework.Utilities;
|
|
using OpenSim.world;
|
|
using OpenSim.Assets;
|
|
|
|
namespace OpenSim
|
|
{
|
|
public delegate bool PacketMethod(SimComms remoteSim, Packet packet);
|
|
|
|
/// <summary>
|
|
/// Handles sim<->sim communications
|
|
/// Constructor takes a single Packet and authenticates everything
|
|
/// </summary>
|
|
public class SimComms
|
|
{
|
|
public LLUUID SimUUID;
|
|
public bool m_child;
|
|
public uint CircuitCode;
|
|
private UseCircuitCodePacket cirpack;
|
|
public Thread ClientThread;
|
|
public EndPoint simEP;
|
|
private BlockingQueue<QueItem> PacketQueue;
|
|
private Dictionary<uint, uint> PendingAcks = new Dictionary<uint, uint>();
|
|
private Dictionary<uint, Packet> NeedAck = new Dictionary<uint, Packet>();
|
|
private System.Timers.Timer AckTimer;
|
|
private uint Sequence = 0;
|
|
private object SequenceLock = new object();
|
|
private const int MAX_APPENDED_ACKS = 10;
|
|
private const int RESEND_TIMEOUT = 4000;
|
|
private const int MAX_SEQUENCE = 0xFFFFFF;
|
|
private bool debug = false;
|
|
private World m_world;
|
|
private Dictionary<uint, SimComms> m_simThreads;
|
|
private IGridServer m_gridServer;
|
|
private IUserServer m_userServer = null;
|
|
private OpenSimNetworkHandler m_application;
|
|
//private bool m_sandboxMode; // I can think of no reason why we'd ever have this set in sandbox mode
|
|
|
|
protected static Dictionary<PacketType, PacketMethod> PacketHandlers = new Dictionary<PacketType, PacketMethod>(); //Global/static handlers for all sims
|
|
|
|
protected Dictionary<PacketType, PacketMethod> m_packetHandlers = new Dictionary<PacketType, PacketMethod>(); //local handlers for this instance
|
|
|
|
public IUserServer UserServer
|
|
{
|
|
set
|
|
{
|
|
this.m_userServer = value;
|
|
}
|
|
}
|
|
|
|
public SimComms(EndPoint remoteEP, UseCircuitCodePacket initialcirpack, World world, Dictionary<uint, SimComms> simThreads, IGridServer gridServer, OpenSimNetworkHandler application)
|
|
{
|
|
m_world = world;
|
|
m_clientThreads = clientThreads;
|
|
m_gridServer = gridServer;
|
|
m_application = application;
|
|
|
|
OpenSim.Framework.Console.MainConsole.Instance.WriteLine("SimComms.cs - Started up new thread to handle incoming request");
|
|
cirpack = initialcirpack;
|
|
simEP = remoteEP;
|
|
|
|
PacketQueue = new BlockingQueue<QueItem>();
|
|
|
|
AckTimer = new System.Timers.Timer(500);
|
|
AckTimer.Elapsed += new ElapsedEventHandler(AckTimer_Elapsed);
|
|
AckTimer.Start();
|
|
|
|
this.RegisterLocalPacketHandlers();
|
|
|
|
ClientThread = new Thread(new ThreadStart(AuthUser));
|
|
ClientThread.IsBackground = true;
|
|
ClientThread.Start();
|
|
}
|
|
|
|
protected virtual void RegisterLocalPacketHandlers()
|
|
{
|
|
/* this.AddLocalPacketHandler(PacketType.LogoutRequest, this.Logout);
|
|
this.AddLocalPacketHandler(PacketType.AgentCachedTexture, this.AgentTextureCached);
|
|
this.AddLocalPacketHandler(PacketType.MultipleObjectUpdate, this.MultipleObjUpdate);*/
|
|
}
|
|
|
|
public static bool AddPacketHandler(PacketType packetType, PacketMethod handler)
|
|
{
|
|
bool result = false;
|
|
lock (PacketHandlers)
|
|
{
|
|
if (!PacketHandlers.ContainsKey(packetType))
|
|
{
|
|
PacketHandlers.Add(packetType, handler);
|
|
result = true;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
public bool AddLocalPacketHandler(PacketType packetType, PacketMethod handler)
|
|
{
|
|
bool result = false;
|
|
lock (m_packetHandlers)
|
|
{
|
|
if (!m_packetHandlers.ContainsKey(packetType))
|
|
{
|
|
m_packetHandlers.Add(packetType, handler);
|
|
result = true;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
protected virtual bool ProcessPacketMethod(Packet packet)
|
|
{
|
|
bool result = false;
|
|
bool found = false;
|
|
PacketMethod method;
|
|
if (m_packetHandlers.TryGetValue(packet.Type, out method))
|
|
{
|
|
//there is a local handler for this packet type
|
|
result = method(this, packet);
|
|
}
|
|
else
|
|
{
|
|
//there is not a local handler so see if there is a Global handler
|
|
lock (PacketHandlers)
|
|
{
|
|
found = PacketHandlers.TryGetValue(packet.Type, out method);
|
|
}
|
|
if (found)
|
|
{
|
|
result = method(this, packet);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
private void ack_pack(Packet Pack)
|
|
{
|
|
if (Pack.Header.Reliable)
|
|
{
|
|
libsecondlife.Packets.PacketAckPacket ack_it = new PacketAckPacket();
|
|
ack_it.Packets = new PacketAckPacket.PacketsBlock[1];
|
|
ack_it.Packets[0] = new PacketAckPacket.PacketsBlock();
|
|
ack_it.Packets[0].ID = Pack.Header.Sequence;
|
|
ack_it.Header.Reliable = false;
|
|
|
|
OutPacket(ack_it);
|
|
|
|
}
|
|
/*
|
|
if (Pack.Header.Reliable)
|
|
{
|
|
lock (PendingAcks)
|
|
{
|
|
uint sequence = (uint)Pack.Header.Sequence;
|
|
if (!PendingAcks.ContainsKey(sequence)) { PendingAcks[sequence] = sequence; }
|
|
}
|
|
}*/
|
|
}
|
|
|
|
protected virtual void ProcessInPacket(Packet Pack)
|
|
{
|
|
ack_pack(Pack);
|
|
|
|
if (this.ProcessPacketMethod(Pack))
|
|
{
|
|
//there is a handler registered that handled this packet type
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
System.Text.Encoding _enc = System.Text.Encoding.ASCII;
|
|
|
|
switch (Pack.Type)
|
|
{
|
|
}
|
|
}
|
|
}
|
|
|
|
private void ResendUnacked()
|
|
{
|
|
int now = Environment.TickCount;
|
|
|
|
lock (NeedAck)
|
|
{
|
|
foreach (Packet packet in NeedAck.Values)
|
|
{
|
|
if ((now - packet.TickCount > RESEND_TIMEOUT) && (!packet.Header.Resent))
|
|
{
|
|
OpenSim.Framework.Console.MainConsole.Instance.WriteLine("Resending " + packet.Type.ToString() + " packet, " +
|
|
(now - packet.TickCount) + "ms have passed");
|
|
|
|
packet.Header.Resent = true;
|
|
OutPacket(packet);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private void SendAcks()
|
|
{
|
|
lock (PendingAcks)
|
|
{
|
|
if (PendingAcks.Count > 0)
|
|
{
|
|
if (PendingAcks.Count > 250)
|
|
{
|
|
// FIXME: Handle the odd case where we have too many pending ACKs queued up
|
|
OpenSim.Framework.Console.MainConsole.Instance.WriteLine("Too many ACKs queued up!");
|
|
return;
|
|
}
|
|
|
|
//OpenSim.Framework.Console.MainConsole.Instance.WriteLine("Sending PacketAck");
|
|
|
|
|
|
int i = 0;
|
|
PacketAckPacket acks = new PacketAckPacket();
|
|
acks.Packets = new PacketAckPacket.PacketsBlock[PendingAcks.Count];
|
|
|
|
foreach (uint ack in PendingAcks.Values)
|
|
{
|
|
acks.Packets[i] = new PacketAckPacket.PacketsBlock();
|
|
acks.Packets[i].ID = ack;
|
|
i++;
|
|
}
|
|
|
|
acks.Header.Reliable = false;
|
|
OutPacket(acks);
|
|
|
|
PendingAcks.Clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
private void AckTimer_Elapsed(object sender, ElapsedEventArgs ea)
|
|
{
|
|
SendAcks();
|
|
ResendUnacked();
|
|
}
|
|
|
|
protected virtual void ProcessOutPacket(Packet Pack)
|
|
{
|
|
|
|
// Keep track of when this packet was sent out
|
|
Pack.TickCount = Environment.TickCount;
|
|
|
|
if (!Pack.Header.Resent)
|
|
{
|
|
// Set the sequence number
|
|
lock (SequenceLock)
|
|
{
|
|
if (Sequence >= MAX_SEQUENCE)
|
|
Sequence = 1;
|
|
else
|
|
Sequence++;
|
|
Pack.Header.Sequence = Sequence;
|
|
}
|
|
|
|
if (Pack.Header.Reliable) //DIRTY HACK
|
|
{
|
|
lock (NeedAck)
|
|
{
|
|
if (!NeedAck.ContainsKey(Pack.Header.Sequence))
|
|
{
|
|
NeedAck.Add(Pack.Header.Sequence, Pack);
|
|
}
|
|
else
|
|
{
|
|
// Client.Log("Attempted to add a duplicate sequence number (" +
|
|
// packet.Header.Sequence + ") to the NeedAck dictionary for packet type " +
|
|
// packet.Type.ToString(), Helpers.LogLevel.Warning);
|
|
}
|
|
}
|
|
|
|
// Don't append ACKs to resent packets, in case that's what was causing the
|
|
// delivery to fail
|
|
if (!Pack.Header.Resent)
|
|
{
|
|
// Append any ACKs that need to be sent out to this packet
|
|
lock (PendingAcks)
|
|
{
|
|
if (PendingAcks.Count > 0 && PendingAcks.Count < MAX_APPENDED_ACKS &&
|
|
Pack.Type != PacketType.PacketAck &&
|
|
Pack.Type != PacketType.LogoutRequest)
|
|
{
|
|
Pack.Header.AckList = new uint[PendingAcks.Count];
|
|
int i = 0;
|
|
|
|
foreach (uint ack in PendingAcks.Values)
|
|
{
|
|
Pack.Header.AckList[i] = ack;
|
|
i++;
|
|
}
|
|
|
|
PendingAcks.Clear();
|
|
Pack.Header.AppendedAcks = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
byte[] ZeroOutBuffer = new byte[4096];
|
|
byte[] sendbuffer;
|
|
sendbuffer = Pack.ToBytes();
|
|
|
|
try
|
|
{
|
|
if (Pack.Header.Zerocoded)
|
|
{
|
|
int packetsize = Helpers.ZeroEncode(sendbuffer, sendbuffer.Length, ZeroOutBuffer);
|
|
m_application.SendPacketTo(ZeroOutBuffer, packetsize, SocketFlags.None, CircuitCode);//userEP);
|
|
}
|
|
else
|
|
{
|
|
m_application.SendPacketTo(sendbuffer, sendbuffer.Length, SocketFlags.None, CircuitCode); //userEP);
|
|
}
|
|
}
|
|
catch (Exception)
|
|
{
|
|
OpenSim.Framework.Console.MainConsole.Instance.WriteLine("SimComms.cs:ProcessOutPacket() - WARNING: Socket exception occurred on connection " + simEP.ToString() + " - killing thread");
|
|
ClientThread.Abort();
|
|
}
|
|
|
|
}
|
|
|
|
public virtual void InPacket(Packet NewPack)
|
|
{
|
|
// Handle appended ACKs
|
|
if (NewPack.Header.AppendedAcks)
|
|
{
|
|
lock (NeedAck)
|
|
{
|
|
foreach (uint ack in NewPack.Header.AckList)
|
|
{
|
|
NeedAck.Remove(ack);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Handle PacketAck packets
|
|
if (NewPack.Type == PacketType.PacketAck)
|
|
{
|
|
PacketAckPacket ackPacket = (PacketAckPacket)NewPack;
|
|
|
|
lock (NeedAck)
|
|
{
|
|
foreach (PacketAckPacket.PacketsBlock block in ackPacket.Packets)
|
|
{
|
|
NeedAck.Remove(block.ID);
|
|
}
|
|
}
|
|
}
|
|
else if ((NewPack.Type == PacketType.StartPingCheck))
|
|
{
|
|
//reply to pingcheck
|
|
libsecondlife.Packets.StartPingCheckPacket startPing = (libsecondlife.Packets.StartPingCheckPacket)NewPack;
|
|
libsecondlife.Packets.CompletePingCheckPacket endPing = new CompletePingCheckPacket();
|
|
endPing.PingID.PingID = startPing.PingID.PingID;
|
|
OutPacket(endPing);
|
|
}
|
|
else
|
|
{
|
|
QueItem item = new QueItem();
|
|
item.Packet = NewPack;
|
|
item.Incoming = true;
|
|
this.PacketQueue.Enqueue(item);
|
|
}
|
|
|
|
}
|
|
|
|
public virtual void OutPacket(Packet NewPack)
|
|
{
|
|
QueItem item = new QueItem();
|
|
item.Packet = NewPack;
|
|
item.Incoming = false;
|
|
this.PacketQueue.Enqueue(item);
|
|
}
|
|
|
|
protected virtual void ClientLoop()
|
|
{
|
|
OpenSim.Framework.Console.MainConsole.Instance.WriteLine("SimComms.cs:ClientLoop() - Entered loop");
|
|
while (true)
|
|
{
|
|
QueItem nextPacket = PacketQueue.Dequeue();
|
|
if (nextPacket.Incoming)
|
|
{
|
|
//is a incoming packet
|
|
ProcessInPacket(nextPacket.Packet);
|
|
}
|
|
else
|
|
{
|
|
//is a out going packet
|
|
ProcessOutPacket(nextPacket.Packet);
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|