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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 System.Reflection;
using log4net;
using Nini.Config;
using OpenMetaverse;
using OpenSim.Framework;
using OpenSim.Framework.Servers;
using OpenSim.Framework.Client;
using OpenSim.Region.Framework.Interfaces;
using OpenSim.Region.Framework.Scenes;
using Mono.Addins;
using OpenSim.Data;
using OpenSim.Data.MySQL;
using MySql.Data.MySqlClient;
using System.Security.Cryptography;
namespace OpenSim.Region.CoreModules.Avatar.InstantMessage
{
public class MuteData
{
public UUID AgentID;
public UUID MuteID;
public string MuteName;
public int MuteType;
public int MuteFlags;
public int Stamp;
}
[Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule", Id = "XMute")]
public class XMuteModule : ISharedRegionModule
{
private static readonly ILog m_log = LogManager.GetLogger(
MethodBase.GetCurrentMethod().DeclaringType);
protected bool m_Enabled = true;
protected List<Scene> m_SceneList = new List<Scene>();
protected MuteTableHandler m_MuteTable;
protected string m_DatabaseConnect;
public void Initialise(IConfigSource config)
{
IConfig cnf = config.Configs["Messaging"];
if (cnf == null)
{
m_Enabled = false;
return;
}
if (cnf.GetString("MuteListModule", "None") !=
"XMute")
{
m_Enabled = false;
return;
}
m_DatabaseConnect = cnf.GetString("MuteDatabaseConnect", String.Empty);
if (m_DatabaseConnect == String.Empty)
{
m_log.Debug("[XMute]: MuteDatabaseConnect missing or empty");
m_Enabled = false;
return;
}
m_MuteTable = new MuteTableHandler(
m_DatabaseConnect, "XMute", String.Empty);
}
public void AddRegion(Scene scene)
{
if (!m_Enabled)
return;
lock (m_SceneList)
{
m_SceneList.Add(scene);
scene.EventManager.OnNewClient += OnNewClient;
}
}
public void RegionLoaded(Scene scene)
{
}
public void RemoveRegion(Scene scene)
{
if (!m_Enabled)
return;
lock (m_SceneList)
{
m_SceneList.Remove(scene);
}
}
public void PostInitialise()
{
if (!m_Enabled)
return;
m_log.Debug("[XMute]: Mute list enabled");
}
public string Name
{
get { return "XMuteModule"; }
}
public Type ReplaceableInterface
{
get { return null; }
}
public void Close()
{
}
private void OnNewClient(IClientAPI client)
{
client.OnMuteListRequest += OnMuteListRequest;
client.OnUpdateMuteListEntry += OnUpdateMuteListEntry;
client.OnRemoveMuteListEntry += OnRemoveMuteListEntry;
}
private void OnMuteListRequest(IClientAPI client, uint crc)
{
string filename = "mutes"+client.AgentId.ToString();
IXfer xfer = client.Scene.RequestModuleInterface<IXfer>();
if (xfer != null)
{
MuteData[] data = m_MuteTable.Get("AgentID", client.AgentId.ToString());
if (data == null || data.Length == 0)
{
xfer.AddNewFile(filename, new Byte[0]);
}
else
{
List<string> mutes = new List<string>();
foreach (MuteData d in data)
mutes.Add(String.Format("{0} {1} {2}|{3}",
d.MuteType,
d.MuteID.ToString(),
d.MuteName,
d.MuteFlags));
Byte[] filedata = Util.UTF8.GetBytes(String.Join("\n",
mutes.ToArray()) + "\n");
uint dataCrc = Crc32.Compute(filedata);
if (dataCrc == crc)
{
client.SendUseCachedMuteList();
return;
}
xfer.AddNewFile(filename, filedata);
}
client.SendMuteListUpdate(filename);
}
}
private void OnUpdateMuteListEntry(IClientAPI client, UUID muteID, string muteName, int muteType, uint muteFlags)
{
MuteData mute = new MuteData();
mute.AgentID = client.AgentId;
mute.MuteID = muteID;
mute.MuteName = muteName;
mute.MuteType = muteType;
mute.MuteFlags = (int)muteFlags;
mute.Stamp = Util.UnixTimeSinceEpoch();
m_MuteTable.Store(mute);
}
private void OnRemoveMuteListEntry(IClientAPI client, UUID muteID, string muteName)
{
m_MuteTable.Delete(new string[] { "AgentID",
"MuteID",
"MuteName" },
new string[] { client.AgentId.ToString(),
muteID.ToString(),
muteName });
}
}
public class MuteTableHandler : MySQLGenericTableHandler<MuteData>
{
public MuteTableHandler(string conn, string realm, string m) : base(conn, realm, m)
{
}
public bool Delete(string[] fields, string[] val)
{
if (fields.Length != val.Length)
return false;
using (MySqlCommand cmd = new MySqlCommand())
{
string text = String.Format("delete from {0} where ", m_Realm);
List<string> terms = new List<string>();
for (int i = 0 ; i < fields.Length ; i++)
{
terms.Add(String.Format("{0} = ?{0}", fields[i]));
cmd.Parameters.AddWithValue("?" + fields[i], val[i]);
}
text += string.Join(" and ", terms.ToArray());
cmd.CommandText = text;
if (ExecuteNonQuery(cmd) > 0)
return true;
return false;
}
}
}
public class Crc32 : HashAlgorithm
{
public const UInt32 DefaultPolynomial = 0xedb88320;
public const UInt32 DefaultSeed = 0xffffffff;
private UInt32 hash;
private UInt32 seed;
private UInt32[] table;
private static UInt32[] defaultTable;
public Crc32()
{
table = InitializeTable(DefaultPolynomial);
seed = DefaultSeed;
Initialize();
}
public Crc32(UInt32 polynomial, UInt32 seed)
{
table = InitializeTable(polynomial);
this.seed = seed;
Initialize();
}
public override void Initialize()
{
hash = seed;
}
protected override void HashCore(byte[] buffer, int start, int length)
{
hash = CalculateHash(table, hash, buffer, start, length);
}
protected override byte[] HashFinal()
{
byte[] hashBuffer = UInt32ToBigEndianBytes(~hash);
this.HashValue = hashBuffer;
return hashBuffer;
}
public override int HashSize
{
get { return 32; }
}
public static UInt32 Compute(byte[] buffer)
{
return ~CalculateHash(InitializeTable(DefaultPolynomial), DefaultSeed, buffer, 0, buffer.Length);
}
public static UInt32 Compute(UInt32 seed, byte[] buffer)
{
return ~CalculateHash(InitializeTable(DefaultPolynomial), seed, buffer, 0, buffer.Length);
}
public static UInt32 Compute(UInt32 polynomial, UInt32 seed, byte[] buffer)
{
return ~CalculateHash(InitializeTable(polynomial), seed, buffer, 0, buffer.Length);
}
private static UInt32[] InitializeTable(UInt32 polynomial)
{
if (polynomial == DefaultPolynomial && defaultTable != null)
return defaultTable;
UInt32[] createTable = new UInt32[256];
for (int i = 0; i < 256; i++)
{
UInt32 entry = (UInt32)i;
for (int j = 0; j < 8; j++)
if ((entry & 1) == 1)
entry = (entry >> 1) ^ polynomial;
else
entry = entry >> 1;
createTable[i] = entry;
}
if (polynomial == DefaultPolynomial)
defaultTable = createTable;
return createTable;
}
private static UInt32 CalculateHash(UInt32[] table, UInt32 seed, byte[] buffer, int start, int size)
{
UInt32 crc = seed;
for (int i = start; i < size; i++)
unchecked
{
crc = (crc >> 8) ^ table[buffer[i] ^ crc & 0xff];
}
return crc;
}
private byte[] UInt32ToBigEndianBytes(UInt32 x)
{
return new byte[] {
(byte)((x >> 24) & 0xff),
(byte)((x >> 16) & 0xff),
(byte)((x >> 8) & 0xff),
(byte)(x & 0xff) };
}
}
}
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