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using System;
using System.Collections.Generic;
using System.Text;
using libsecondlife;
using OpenSim.Framework.Interfaces;
using OpenSim.Framework.Utilities;
namespace OpenSim.Region.Environment
{
public class XferManager
{
public Dictionary<string, byte[]> NewFiles = new Dictionary<string, byte[]>();
public Dictionary<ulong, XferDownLoad> Transfers = new Dictionary<ulong, XferDownLoad>();
public XferManager()
{
}
/// <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);
transaction.StartSend();
}
}
}
}
public void AckPacket(IClientAPI remoteClient, ulong xferID, uint packet)
{
if (this.Transfers.ContainsKey(xferID))
{
Transfers[xferID].AckPacket(packet);
}
}
public void AddNewFile(string fileName, byte[] data)
{
lock (NewFiles)
{
if (NewFiles.ContainsKey(fileName))
{
NewFiles[fileName] = data;
}
else
{
NewFiles.Add(fileName, data);
}
}
}
public class XferDownLoad
{
public byte[] Data = new byte[0];
public string FileName = "";
public ulong XferID = 0;
public int DataPointer = 0;
public uint Packet = 0;
public IClientAPI Client;
public uint Serial = 1;
private bool complete = false;
public XferDownLoad(string fileName, byte[] data, ulong xferID, IClientAPI client)
{
FileName = fileName;
Data = data;
XferID = xferID;
Client = client;
}
public XferDownLoad()
{
}
public void StartSend()
{
if (Data.Length < 1000)
{
// for now (testing ) we only support files under 1000 bytes
byte[] transferData = new byte[Data.Length + 4];
Array.Copy(Helpers.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(Helpers.IntToBytes(Data.Length), 0, transferData, 0, 4);
Array.Copy(Data, 0, transferData, 4, 1000);
Client.SendXferPacket(XferID, 0 , transferData);
Packet++;
DataPointer = 1000;
}
}
public void 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;
}
}
}
}
}
}
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