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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 OpenSimulator 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.Collections.Generic;
using Nini.Config;
using OpenMetaverse;
using OpenSim.Framework;
using OpenSim.Region.Framework.Interfaces;
using OpenSim.Region.Framework.Scenes;
namespace OpenSim.Region.CoreModules.Agent.Xfer
{
public class XferModule : IRegionModule, IXfer
{
private Scene m_scene;
public Dictionary<string, byte[]> NewFiles = new Dictionary<string, byte[]>();
public Dictionary<ulong, XferDownLoad> Transfers = new Dictionary<ulong, XferDownLoad>();
#region IRegionModule Members
public void Initialise(Scene scene, IConfigSource config)
{
m_scene = scene;
m_scene.EventManager.OnNewClient += NewClient;
m_scene.RegisterModuleInterface<IXfer>(this);
}
public void PostInitialise()
{
}
public void Close()
{
}
public string Name
{
get { return "XferModule"; }
}
public bool IsSharedModule
{
get { return false; }
}
#endregion
#region IXfer Members
public bool AddNewFile(string fileName, byte[] data)
{
lock (NewFiles)
{
if (NewFiles.ContainsKey(fileName))
{
NewFiles[fileName] = data;
}
else
{
NewFiles.Add(fileName, data);
}
}
return true;
}
#endregion
public void NewClient(IClientAPI client)
{
client.OnRequestXfer += RequestXfer;
client.OnConfirmXfer += AckPacket;
}
/// <summary>
///
/// </summary>
/// <param name="remoteClient"></param>
/// <param name="xferID"></param>
/// <param name="fileName"></param>
public void RequestXfer(IClientAPI remoteClient, ulong xferID, string fileName)
{
lock (NewFiles)
{
if (NewFiles.ContainsKey(fileName))
{
if (!Transfers.ContainsKey(xferID))
{
byte[] fileData = NewFiles[fileName];
XferDownLoad transaction = new XferDownLoad(fileName, fileData, xferID, remoteClient);
Transfers.Add(xferID, transaction);
NewFiles.Remove(fileName);
if (transaction.StartSend())
{
Transfers.Remove(xferID);
}
}
}
}
}
public void AckPacket(IClientAPI remoteClient, ulong xferID, uint packet)
{
if (Transfers.ContainsKey(xferID))
{
if (Transfers[xferID].AckPacket(packet))
{
{
Transfers.Remove(xferID);
}
}
}
}
#region Nested type: XferDownLoad
public class XferDownLoad
{
public IClientAPI Client;
private bool complete;
public byte[] Data = new byte[0];
public int DataPointer = 0;
public string FileName = String.Empty;
public uint Packet = 0;
public uint Serial = 1;
public ulong XferID = 0;
public XferDownLoad(string fileName, byte[] data, ulong xferID, IClientAPI client)
{
FileName = fileName;
Data = data;
XferID = xferID;
Client = client;
}
public XferDownLoad()
{
}
/// <summary>
/// Start a transfer
/// </summary>
/// <returns>True if the transfer is complete, false if not</returns>
public bool StartSend()
{
if (Data.Length < 1000)
{
// for now (testing) we only support files under 1000 bytes
byte[] transferData = new byte[Data.Length + 4];
Array.Copy(Utils.IntToBytes(Data.Length), 0, transferData, 0, 4);
Array.Copy(Data, 0, transferData, 4, Data.Length);
Client.SendXferPacket(XferID, 0 + 0x80000000, transferData);
complete = true;
}
else
{
byte[] transferData = new byte[1000 + 4];
Array.Copy(Utils.IntToBytes(Data.Length), 0, transferData, 0, 4);
Array.Copy(Data, 0, transferData, 4, 1000);
Client.SendXferPacket(XferID, 0, transferData);
Packet++;
DataPointer = 1000;
}
return complete;
}
/// <summary>
/// Respond to an ack packet from the client
/// </summary>
/// <param name="packet"></param>
/// <returns>True if the transfer is complete, false otherwise</returns>
public bool AckPacket(uint packet)
{
if (!complete)
{
if ((Data.Length - DataPointer) > 1000)
{
byte[] transferData = new byte[1000];
Array.Copy(Data, DataPointer, transferData, 0, 1000);
Client.SendXferPacket(XferID, Packet, transferData);
Packet++;
DataPointer += 1000;
}
else
{
byte[] transferData = new byte[Data.Length - DataPointer];
Array.Copy(Data, DataPointer, transferData, 0, Data.Length - DataPointer);
uint endPacket = Packet |= (uint) 0x80000000;
Client.SendXferPacket(XferID, endPacket, transferData);
Packet++;
DataPointer += (Data.Length - DataPointer);
complete = true;
}
}
return complete;
}
}
#endregion
}
}
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