2 files changed, 373 insertions, 0 deletions

diff --git a/OpenSim/Data/MySQL/Resources/XMute.migrations b/OpenSim/Data/MySQL/Resources/XMute.migrations
new file mode 100644
index 0000000..4ac7f82
--- /dev/null
+++ b/OpenSim/Data/MySQL/Resources/XMute.migrations
@@ -0,0 +1,16 @@
+:VERSION 1
+
+BEGIN;
+
+CREATE TABLE `XMute` (
+  `AgentID` char(36) NOT NULL,
+  `MuteID` char(36) NOT NULL DEFAULT '00000000-0000-0000-0000-000000000000',
+  `MuteName` varchar(64) NOT NULL DEFAULT '',
+  `MuteType` int(11) NOT NULL DEFAULT '1',
+  `MuteFlags` int(11) NOT NULL DEFAULT '0',
+  `Stamp` int(11) NOT NULL,
+  UNIQUE KEY `AgentID_2` (`AgentID`,`MuteID`,`MuteName`),
+  KEY `AgentID` (`AgentID`)
+);
+
+COMMIT;
diff --git a/OpenSim/Region/CoreModules/Avatar/InstantMessage/XMuteModule.cs b/OpenSim/Region/CoreModules/Avatar/InstantMessage/XMuteModule.cs
new file mode 100644
index 0000000..fb5239f
--- /dev/null
+++ b/OpenSim/Region/CoreModules/Avatar/InstantMessage/XMuteModule.cs
@@ -0,0 +1,357 @@
+/*
+ * 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) };
+        }
+    }
+}
+