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using System;
using System.Text;
using System.IO;
using System.Threading;
using System.Net;
using System.Net.Sockets;
using System.Timers;
using System.Reflection;
using System.Collections;
using System.Collections.Generic;
using libsecondlife;
using libsecondlife.Packets;
using OpenSim.Framework.Console;
namespace OpenSim.Servers
{
public class CheckSumServer : UDPServerBase
{
protected ConsoleBase m_console;
public CheckSumServer(int port, ConsoleBase console)
{
listenPort = port;
this.m_console = console;
}
protected override void OnReceivedData(IAsyncResult result)
{
ipeSender = new IPEndPoint(IPAddress.Any, 0);
epSender = (EndPoint)ipeSender;
Packet packet = null;
int numBytes = Server.EndReceiveFrom(result, ref epSender);
int packetEnd = numBytes - 1;
packet = Packet.BuildPacket(RecvBuffer, ref packetEnd, ZeroBuffer);
// do we already have a circuit for this endpoint
if (packet.Type == PacketType.SecuredTemplateChecksumRequest)
{
SecuredTemplateChecksumRequestPacket checksum = (SecuredTemplateChecksumRequestPacket)packet;
TemplateChecksumReplyPacket checkreply = new TemplateChecksumReplyPacket();
checkreply.DataBlock.Checksum = 180572585;
checkreply.DataBlock.Flags = 0;
checkreply.DataBlock.MajorVersion = 1;
checkreply.DataBlock.MinorVersion = 15;
checkreply.DataBlock.PatchVersion = 0;
checkreply.DataBlock.ServerVersion = 0;
checkreply.TokenBlock.Token = checksum.TokenBlock.Token;
this.SendPacket(checkreply, epSender);
/*
//if we wanted to echo the the checksum/ version from the client (so that any client worked)
SecuredTemplateChecksumRequestPacket checkrequest = new SecuredTemplateChecksumRequestPacket();
checkrequest.TokenBlock.Token = checksum.TokenBlock.Token;
this.SendPacket(checkrequest, epSender);
*/
}
else if (packet.Type == PacketType.TemplateChecksumReply)
{
//echo back the client checksum reply (Hegemon's method)
TemplateChecksumReplyPacket checksum = (TemplateChecksumReplyPacket)packet;
TemplateChecksumReplyPacket checkreply2 = new TemplateChecksumReplyPacket();
checkreply2.DataBlock.Checksum = checksum.DataBlock.Checksum;
checkreply2.DataBlock.Flags = checksum.DataBlock.Flags;
checkreply2.DataBlock.MajorVersion = checksum.DataBlock.MajorVersion;
checkreply2.DataBlock.MinorVersion = checksum.DataBlock.MinorVersion;
checkreply2.DataBlock.PatchVersion = checksum.DataBlock.PatchVersion;
checkreply2.DataBlock.ServerVersion = checksum.DataBlock.ServerVersion;
checkreply2.TokenBlock.Token = checksum.TokenBlock.Token;
this.SendPacket(checkreply2, epSender);
}
else
{
}
Server.BeginReceiveFrom(RecvBuffer, 0, RecvBuffer.Length, SocketFlags.None, ref epSender, ReceivedData, null);
}
private void SendPacket(Packet Pack, EndPoint endp)
{
if (!Pack.Header.Resent)
{
// Set the sequence number
Pack.Header.Sequence = 1;
}
byte[] ZeroOutBuffer = new byte[4096];
byte[] sendbuffer;
sendbuffer = Pack.ToBytes();
try
{
if (Pack.Header.Zerocoded)
{
int packetsize = Helpers.ZeroEncode(sendbuffer, sendbuffer.Length, ZeroOutBuffer);
this.SendPackTo(ZeroOutBuffer, packetsize, SocketFlags.None, endp);
}
else
{
this.SendPackTo(sendbuffer, sendbuffer.Length, SocketFlags.None, endp);
}
}
catch (Exception)
{
OpenSim.Framework.Console.MainConsole.Instance.WriteLine(OpenSim.Framework.Console.LogPriority.MEDIUM, "OpenSimClient.cs:ProcessOutPacket() - WARNING: Socket exception occurred on connection ");
}
}
private void SendPackTo(byte[] buffer, int size, SocketFlags flags, EndPoint endp)
{
this.Server.SendTo(buffer, size, flags, endp);
}
}
}
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