14 files changed, 340 insertions, 57 deletions

diff --git a/OpenSim/Framework/AvatarWearable.cs b/OpenSim/Framework/AvatarWearable.cs
index c7083f3..e7c2338 100644
--- a/OpenSim/Framework/AvatarWearable.cs
+++ b/OpenSim/Framework/AvatarWearable.cs
@@ -26,10 +26,14 @@
 * 
 */
 using libsecondlife;
+using System;
+using System.Runtime.Serialization;
+using System.Security.Permissions;
 
 namespace OpenSim.Framework
 {
-    public class AvatarWearable
+    [Serializable]
+    public class AvatarWearable : ISerializable
     {
         public LLUUID AssetID = new LLUUID("00000000-0000-0000-0000-000000000000");
         public LLUUID ItemID = new LLUUID("00000000-0000-0000-0000-000000000000");
@@ -67,5 +71,32 @@ namespace OpenSim.Framework
                 return defaultWearables;
             }
         }
+        protected AvatarWearable(SerializationInfo info, StreamingContext context)
+        {
+            //System.Console.WriteLine("AvatarWearable Deserialize BGN");
+            if (info == null)
+            {
+                throw new System.ArgumentNullException("info");
+            }
+
+            AssetID = new LLUUID((Guid)info.GetValue("AssetID", typeof(Guid)));
+            ItemID = new LLUUID((Guid)info.GetValue("ItemID", typeof(Guid)));
+
+            //System.Console.WriteLine("AvatarWearable Deserialize END");
+        }
+
+        [SecurityPermission(SecurityAction.LinkDemand,
+            Flags = SecurityPermissionFlag.SerializationFormatter)]
+        public virtual void GetObjectData(
+                        SerializationInfo info, StreamingContext context)
+        {
+            if (info == null)
+            {
+                throw new System.ArgumentNullException("info");
+            }
+
+            info.AddValue("AssetID", AssetID.UUID);
+            info.AddValue("ItemID", ItemID.UUID);
+        }
     }
-}
\ No newline at end of file
+}
diff --git a/OpenSim/Framework/BlockingQueue.cs b/OpenSim/Framework/BlockingQueue.cs
index e72884c..6f56782 100644
--- a/OpenSim/Framework/BlockingQueue.cs
+++ b/OpenSim/Framework/BlockingQueue.cs
@@ -69,5 +69,10 @@ namespace OpenSim.Framework
         {
             return m_queue.Count;
         }
+
+        public T[] GetQueueArray()
+        {
+            return m_queue.ToArray();
+        }
     }
 }
diff --git a/OpenSim/Framework/ClientManager.cs b/OpenSim/Framework/ClientManager.cs
index cfdcbf0..39d8d99 100644
--- a/OpenSim/Framework/ClientManager.cs
+++ b/OpenSim/Framework/ClientManager.cs
@@ -137,7 +137,7 @@ namespace OpenSim.Framework
             }
         }
 
-        private uint[] GetAllCircuits(LLUUID agentId)
+        public uint[] GetAllCircuits(LLUUID agentId) 
         {
             List<uint> circuits = new List<uint>();
             // Wasteful, I know
diff --git a/OpenSim/Framework/Data.MySQL/MySQLGridData.cs b/OpenSim/Framework/Data.MySQL/MySQLGridData.cs
index 3737e48..eefb4e9 100644
--- a/OpenSim/Framework/Data.MySQL/MySQLGridData.cs
+++ b/OpenSim/Framework/Data.MySQL/MySQLGridData.cs
@@ -97,6 +97,11 @@ namespace OpenSim.Framework.Data.MySQL
                 database.ExecuteResourceSql("CreateRegionsTable.sql");
                 return;
             }
+            else if (oldVersion.Contains("Rev. 1"))
+            {
+                database.ExecuteResourceSql("UpgradeRegionsTableToVersion2.sql");
+                return;
+            }
         }
 
         #endregion
@@ -260,6 +265,27 @@ namespace OpenSim.Framework.Data.MySQL
         }
 
         /// <summary>
+        /// Deletes a profile from the database
+        /// </summary>
+        /// <param name="profile">The profile to delete</param>
+        /// <returns>Successful?</returns>
+        //public DataResponse DeleteProfile(RegionProfileData profile)
+        public DataResponse DeleteProfile(string uuid)
+        {
+            lock (database)
+            {
+                if (database.deleteRegion(uuid))
+                {
+                    return DataResponse.RESPONSE_OK;
+                }
+                else
+                {
+                    return DataResponse.RESPONSE_ERROR;
+                }
+            }
+        }
+
+        /// <summary>
         /// DEPRECIATED. Attempts to authenticate a region by comparing a shared secret.
         /// </summary>
         /// <param name="uuid">The UUID of the challenger</param>
@@ -328,4 +354,4 @@ namespace OpenSim.Framework.Data.MySQL
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/OpenSim/Framework/Data.MySQL/MySQLManager.cs b/OpenSim/Framework/Data.MySQL/MySQLManager.cs
index ea11aa0..0410643 100644
--- a/OpenSim/Framework/Data.MySQL/MySQLManager.cs
+++ b/OpenSim/Framework/Data.MySQL/MySQLManager.cs
@@ -301,6 +301,7 @@ namespace OpenSim.Framework.Data.MySQL
 
                 // non-critical parts
                 retval.regionName = (string)reader["regionName"];
+                retval.originUUID = new LLUUID((string) reader["originUUID"]); 
 
                 // Secrets
                 retval.regionRecvKey = (string) reader["regionRecvKey"];
@@ -752,13 +753,13 @@ namespace OpenSim.Framework.Data.MySQL
             // server for the UUID of the region's owner (master avatar). It consists of the addition of the column and value to the relevant sql,
             // as well as the related parameterization
             sql +=
-                "regionAssetSendKey, regionUserURI, regionUserRecvKey, regionUserSendKey, regionMapTexture, serverHttpPort, serverRemotingPort, owner_uuid) VALUES ";
+                "regionAssetSendKey, regionUserURI, regionUserRecvKey, regionUserSendKey, regionMapTexture, serverHttpPort, serverRemotingPort, owner_uuid, originUUID) VALUES ";
 
             sql += "(?regionHandle, ?regionName, ?uuid, ?regionRecvKey, ?regionSecret, ?regionSendKey, ?regionDataURI, ";
             sql +=
                 "?serverIP, ?serverPort, ?serverURI, ?locX, ?locY, ?locZ, ?eastOverrideHandle, ?westOverrideHandle, ?southOverrideHandle, ?northOverrideHandle, ?regionAssetURI, ?regionAssetRecvKey, ";
             sql +=
-                "?regionAssetSendKey, ?regionUserURI, ?regionUserRecvKey, ?regionUserSendKey, ?regionMapTexture, ?serverHttpPort, ?serverRemotingPort, ?owner_uuid)";
+                "?regionAssetSendKey, ?regionUserURI, ?regionUserRecvKey, ?regionUserSendKey, ?regionMapTexture, ?serverHttpPort, ?serverRemotingPort, ?owner_uuid, ?originUUID)";
 
             if (GRID_ONLY_UPDATE_NECESSARY_DATA)
             {
@@ -798,6 +799,7 @@ namespace OpenSim.Framework.Data.MySQL
             parameters["?serverHttpPort"] = regiondata.httpPort.ToString();
             parameters["?serverRemotingPort"] = regiondata.remotingPort.ToString();
             parameters["?owner_uuid"] = regiondata.owner_uuid.ToString();
+            parameters["?originUUID"] = regiondata.originUUID.ToString();
 
             bool returnval = false;
 
@@ -821,5 +823,41 @@ namespace OpenSim.Framework.Data.MySQL
 
             return returnval;
         }
+        /// <summary>
+        /// Delete a region from the database
+        /// </summary>
+        /// <param name="profile">The region to insert</param>
+        /// <returns>Success?</returns>
+        //public bool deleteRegion(RegionProfileData regiondata)
+        public bool deleteRegion(string uuid)
+        {
+            bool returnval = false;
+
+            string sql =
+                "DELETE FROM regions WHERE uuid = ?uuid;";
+
+            Dictionary<string, string> parameters = new Dictionary<string, string>();
+
+            try
+            {
+                    parameters["?uuid"] = uuid;
+
+                IDbCommand result = Query(sql, parameters);
+
+                int x;
+                if ((x = result.ExecuteNonQuery()) > 0)
+                {
+                    returnval = true;
+                }
+                result.Dispose();
+            }
+            catch (Exception e)
+            {
+                m_log.Error(e.ToString());
+                return false;
+            }
+
+            return returnval;
+        }
     }
 }
diff --git a/OpenSim/Framework/Data.MySQL/Resources/CreateRegionsTable.sql b/OpenSim/Framework/Data.MySQL/Resources/CreateRegionsTable.sql
index 07b0d9b..23535af 100644
--- a/OpenSim/Framework/Data.MySQL/Resources/CreateRegionsTable.sql
+++ b/OpenSim/Framework/Data.MySQL/Resources/CreateRegionsTable.sql
@@ -23,8 +23,9 @@ CREATE TABLE `regions` (
   `regionUserRecvKey` varchar(128) default NULL,
   `regionUserSendKey` varchar(128) default NULL, `regionMapTexture` varchar(36) default NULL,
   `serverHttpPort` int(10) default NULL, `serverRemotingPort` int(10) default NULL,
+  `originUUID` varchar(36),
   PRIMARY KEY  (`uuid`),
   KEY `regionName` (`regionName`),
   KEY `regionHandle` (`regionHandle`),
   KEY `overrideHandles` (`eastOverrideHandle`,`westOverrideHandle`,`southOverrideHandle`,`northOverrideHandle`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8 ROW_FORMAT=FIXED COMMENT='Rev. 1';
+) ENGINE=InnoDB DEFAULT CHARSET=utf8 ROW_FORMAT=FIXED COMMENT='Rev. 2';
diff --git a/OpenSim/Framework/Data.MySQL/Resources/UpgradeRegionsTableToVersion2.sql b/OpenSim/Framework/Data.MySQL/Resources/UpgradeRegionsTableToVersion2.sql
new file mode 100644
index 0000000..5880954
--- /dev/null
+++ b/OpenSim/Framework/Data.MySQL/Resources/UpgradeRegionsTableToVersion2.sql
@@ -0,0 +1,3 @@
+ALTER TABLE `regions` 
+        ADD COLUMN `originUUID` varchar(36),
+COMMENT='Rev. 2';
diff --git a/OpenSim/Framework/Data/RegionProfileData.cs b/OpenSim/Framework/Data/RegionProfileData.cs
index f9f4283..e4b48b7 100644
--- a/OpenSim/Framework/Data/RegionProfileData.cs
+++ b/OpenSim/Framework/Data/RegionProfileData.cs
@@ -130,6 +130,12 @@ namespace OpenSim.Framework.Data
         public LLUUID owner_uuid = LLUUID.Zero;
 
         /// <summary>
+        /// OGS/OpenSim Specific original ID for a region after move/split
+        /// </summary>
+        public LLUUID originUUID; 
+
+
+        /// <summary>
         /// Get Sim profile data from grid server when in grid mode
         /// </summary>
         /// <param name="region_uuid"></param>
@@ -162,7 +168,7 @@ namespace OpenSim.Framework.Data
             simData.serverPort = Convert.ToUInt32((string) responseData["sim_port"]);
             simData.httpPort = Convert.ToUInt32((string) responseData["http_port"]);
             simData.remotingPort = Convert.ToUInt32((string) responseData["remoting_port"]);
-            simData.serverURI = "http://" + simData.serverIP + ":" + simData.serverPort.ToString() + "/";
+                        simData.serverURI = (string)responseData["server_uri"]; 
             simData.httpServerURI = "http://" + simData.serverIP + ":" + simData.httpPort.ToString() + "/";
             simData.UUID = new LLUUID((string) responseData["region_UUID"]);
             simData.regionName = (string) responseData["region_name"];
@@ -205,7 +211,7 @@ namespace OpenSim.Framework.Data
             simData.httpPort = Convert.ToUInt32((string) responseData["http_port"]);
             simData.remotingPort = Convert.ToUInt32((string) responseData["remoting_port"]);
             simData.httpServerURI = "http://" + simData.serverIP + ":" + simData.httpPort.ToString() + "/";
-            simData.serverURI = "http://" + simData.serverIP + ":" + simData.serverPort.ToString() + "/";
+                        simData.serverURI = (string)responseData["server_uri"]; 
             simData.UUID = new LLUUID((string) responseData["region_UUID"]);
             simData.regionName = (string) responseData["region_name"];
 
diff --git a/OpenSim/Framework/IClientAPI.cs b/OpenSim/Framework/IClientAPI.cs
index 5001f00..7a0a232 100644
--- a/OpenSim/Framework/IClientAPI.cs
+++ b/OpenSim/Framework/IClientAPI.cs
@@ -665,5 +665,24 @@ namespace OpenSim.Framework
         void SendBlueBoxMessage(LLUUID FromAvatarID, LLUUID fromSessionID, String FromAvatarName, String Message);
 
         void SendLogoutPacket();
+        ClientInfo GetClientInfo();
+        void SetClientInfo(ClientInfo info);
+        void Terminate();
+    }
+
+    [Serializable]
+    public class ClientInfo
+    {
+        public byte[] usecircuit;
+        public EndPoint userEP;
+        public EndPoint proxyEP;
+        public sAgentCircuitData agentcircuit;
+
+        public Dictionary<uint, uint> pendingAcks;
+        public Dictionary<uint, byte[]> needAck;
+
+        public List<byte[]> out_packets;
+
+        public uint sequence;
     }
 }
diff --git a/OpenSim/Framework/IScene.cs b/OpenSim/Framework/IScene.cs
index 3445050..0bb0efb 100644
--- a/OpenSim/Framework/IScene.cs
+++ b/OpenSim/Framework/IScene.cs
@@ -38,7 +38,8 @@ namespace OpenSim.Framework
         Down = 0,
         Up = 1,
         Crashed = 2,
-        Starting = 3
+        Starting = 3,
+                SlaveScene = 4 
     } ;
 
     public interface IScene
@@ -63,4 +64,4 @@ namespace OpenSim.Framework
 
         ClientManager ClientManager { get; }
     }
-}
\ No newline at end of file
+}
diff --git a/OpenSim/Framework/PacketPool.cs b/OpenSim/Framework/PacketPool.cs
index 30b6d6a..2c44ae3 100644
--- a/OpenSim/Framework/PacketPool.cs
+++ b/OpenSim/Framework/PacketPool.cs
@@ -26,6 +26,7 @@
 * 
 */
 using System;
+using System.Net;
 using System.Collections;
 using libsecondlife.Packets;
 
@@ -33,29 +34,68 @@ namespace OpenSim.Framework
 {
     public sealed class PacketPool
     {
+                static public void EncodeProxyMessage(byte[] bytes, ref int numBytes, EndPoint trueEP)
+                {
+                        if( numBytes > 4090 ) // max UPD size = 4096
+                        {
+                                throw new Exception("ERROR: No space to encode the proxy EP");
+                        }
+
+            ushort port = (ushort) ((IPEndPoint) trueEP).Port;
+            bytes[numBytes++] = (byte)(port % 256);
+            bytes[numBytes++] = (byte)(port / 256);
+            
+            foreach (byte b in ((IPEndPoint)trueEP).Address.GetAddressBytes())
+            {
+                bytes[numBytes++] = b;
+            }
+
+            int x = numBytes;
+
+            DecodeProxyMessage(bytes, ref numBytes);
+
+            numBytes = x;
+                }
+                
+                static public EndPoint DecodeProxyMessage(byte[] bytes, ref int numBytes)
+                {
+            // IPv4 Only
+            byte[] addr = new byte[4];
+
+            addr[3] = bytes[--numBytes];
+            addr[2] = bytes[--numBytes];
+            addr[1] = bytes[--numBytes];
+            addr[0] = bytes[--numBytes];
+
+            ushort port = (ushort)(bytes[--numBytes] * 256);
+            port += (ushort)bytes[--numBytes];
+
+            return (EndPoint) new IPEndPoint(new IPAddress(addr), (int)port);
+        }
+
         // Set up a thread-safe singleton pattern
         static PacketPool()
         {
         }
 
-        private static readonly PacketPool instance = new PacketPool();
+        static readonly PacketPool instance = new PacketPool();
 
         public static PacketPool Instance
         {
-            get { return instance; }
+            get
+            {
+                return instance;
+            }
         }
 
         private Hashtable pool = new Hashtable();
 
-        public Packet GetPacket(PacketType type)
-        {
-            return Packet.BuildPacket(type);
-/* Skip until PacketPool performance problems have been resolved (mantis 281)
+        public Packet GetPacket(PacketType type) {
             Packet packet = null;
 
-            lock (pool)
+            lock(pool)
             {
-                if (pool[type] == null || ((Stack) pool[type]).Count == 0)
+                if(pool[type] == null || ((Stack) pool[type]).Count == 0)
                 {
                     // Creating a new packet if we cannot reuse an old package
                     packet = Packet.BuildPacket(type);
@@ -63,39 +103,16 @@ namespace OpenSim.Framework
                 else
                 {
                     // Recycle old packages
-                    packet = (Packet) ((Stack) pool[type]).Pop();
+                    packet=(Packet) ((Stack) pool[type]).Pop();
                 }
             }
 
             return packet;
-*/
-        }
-
-        // Copied from LibSL, and added a check to avoid overwriting the
-        // buffer
-        private void ZeroDecodeCommand(byte[] src, byte[] dest)
-        {
-            for (int srcPos = 6, destPos = 6; destPos < 10; ++srcPos)
-            {
-                if (src[srcPos] == 0x00)
-                {
-                    for (byte j = 0; j < src[srcPos + 1] && destPos < 10; ++j)
-                    {
-                        dest[destPos++] = 0x00;
-                    }
-                    ++srcPos;
-                                                                                                }
-                else
-                {
-                    dest[destPos++] = src[srcPos];
-                }
-            }
         }
 
+        private byte[] decoded_header = new byte[10];
         private PacketType GetType(byte[] bytes)
         {
-            byte[] decoded_header = new byte[10];
-
             ushort id;
             libsecondlife.PacketFrequency freq;
 
@@ -103,7 +120,7 @@ namespace OpenSim.Framework
 
             if((bytes[0] & libsecondlife.Helpers.MSG_ZEROCODED)!=0)
             {
-                ZeroDecodeCommand(bytes, decoded_header);
+                libsecondlife.Helpers.ZeroDecodeCommand(bytes, decoded_header);
             }
 
             if (decoded_header[6] == 0xFF)
@@ -138,21 +155,22 @@ namespace OpenSim.Framework
             return packet;
         }
 
-        public void ReturnPacket(Packet packet) 
-        {
-/* Skip until PacketPool performance problems have been resolved (mantis 281)
-            lock (pool)
+        public void ReturnPacket(Packet packet) {
+            return; // packet pool disabled
+
+            lock(pool)
             {
-                PacketType type = packet.Type;
+                PacketType type=packet.Type;
 
-                if (pool[type] == null)
+                if(pool[type] == null)
                 {
                     pool[type] = new Stack();
                 }
-
-                ((Stack) pool[type]).Push(packet);
+                if (((Stack)pool[type]).Count < 50)
+                {
+                    ((Stack)pool[type]).Push(packet);
+                }
             }
-*/
         }
     }
 }
diff --git a/OpenSim/Framework/RegionInfo.cs b/OpenSim/Framework/RegionInfo.cs
index f97db5c..43e2a24 100644
--- a/OpenSim/Framework/RegionInfo.cs
+++ b/OpenSim/Framework/RegionInfo.cs
@@ -71,6 +71,7 @@ namespace OpenSim.Framework
             m_allow_alternate_ports = ConvertFrom.m_allow_alternate_ports;
             RemotingAddress = ConvertFrom.RemotingAddress;
             RegionID = LLUUID.Zero;
+            ServerURI = ConvertFrom.ServerURI; 
         }
 
         public LLUUID RegionID = LLUUID.Zero;
@@ -84,6 +85,19 @@ namespace OpenSim.Framework
         }
         public bool m_allow_alternate_ports;
 
+        public string m_serverURI;
+        public string ServerURI
+        {
+            get
+            {
+                return m_serverURI;
+            }
+            set
+            {
+                m_serverURI = value;
+            }
+        }
+
         public string RemotingAddress;
 
         public IPEndPoint ExternalEndPoint
@@ -175,6 +189,8 @@ namespace OpenSim.Framework
         public string MasterAvatarFirstName = String.Empty;
         public string MasterAvatarLastName = String.Empty;
         public string MasterAvatarSandboxPassword = String.Empty;
+        public string proxyUrl = ""; 
+        public LLUUID originRegionID = LLUUID.Zero;
 
         // Apparently, we're applying the same estatesettings regardless of whether it's local or remote.
         private EstateSettings m_estateSettings;
@@ -227,6 +243,10 @@ namespace OpenSim.Framework
             m_allow_alternate_ports = ConvertFrom.m_allow_alternate_ports;
             RemotingAddress = ConvertFrom.RemotingAddress;
             RegionID = LLUUID.Zero;
+            proxyUrl = ConvertFrom.ProxyUrl;
+            originRegionID = ConvertFrom.OriginRegionID;
+            RegionName = ConvertFrom.RegionName;
+            ServerURI = ConvertFrom.ServerURI;
         }
 
         public RegionInfo(SimpleRegionInfo ConvertFrom)
@@ -239,6 +259,7 @@ namespace OpenSim.Framework
             m_allow_alternate_ports = ConvertFrom.m_allow_alternate_ports;
             RemotingAddress = ConvertFrom.RemotingAddress;
             RegionID = LLUUID.Zero;
+            ServerURI = ConvertFrom.ServerURI; 
         }
 
         //not in use, should swap to nini though.
@@ -411,4 +432,4 @@ namespace OpenSim.Framework
 
         }
     }
-}
\ No newline at end of file
+}
diff --git a/OpenSim/Framework/SerializableRegionInfo.cs b/OpenSim/Framework/SerializableRegionInfo.cs
index 077ed8d..48ddbdf 100644
--- a/OpenSim/Framework/SerializableRegionInfo.cs
+++ b/OpenSim/Framework/SerializableRegionInfo.cs
@@ -51,6 +51,10 @@ namespace OpenSim.Framework
             m_remotingPort = ConvertFrom.RemotingPort;
             m_allow_alternate_ports = ConvertFrom.m_allow_alternate_ports;
             RemotingAddress = ConvertFrom.RemotingAddress;
+            m_proxyUrl = ConvertFrom.proxyUrl; 
+            OriginRegionID = ConvertFrom.originRegionID;
+            RegionName = ConvertFrom.RegionName;
+            ServerURI = ConvertFrom.ServerURI;
         }
 
         public SearializableRegionInfo(uint regionLocX, uint regionLocY, IPEndPoint internalEndPoint, string externalUri)
@@ -157,5 +161,57 @@ namespace OpenSim.Framework
         {
             get { return Util.UIntsToLong((RegionLocX * (uint)Constants.RegionSize), (RegionLocY * (uint)Constants.RegionSize)); }
         }
-    }
-}
\ No newline at end of file
+
+        protected string m_proxyUrl;
+        public string ProxyUrl
+        {
+            get
+            {
+                return m_proxyUrl;
+            }
+            set
+            {
+                m_proxyUrl = value;
+            }
+        }
+
+        protected Guid m_originRegionID = LLUUID.Zero.UUID;
+        public LLUUID OriginRegionID
+        {
+            get
+            {
+                return new LLUUID(m_originRegionID);
+            }
+            set
+            {
+                m_originRegionID = value.UUID;
+            }
+        }
+
+        protected string m_regionName;
+        public string RegionName
+        {
+            get
+            {
+                return m_regionName;
+            }
+            set
+            {
+                m_regionName = value;
+            }
+        }
+
+        protected string m_serverURI;
+        public string ServerURI
+        {
+            get
+            {
+                return m_serverURI;
+            }
+            set
+            {
+                m_serverURI = value;
+            }
+        }
+   }
+}
diff --git a/OpenSim/Framework/Util.cs b/OpenSim/Framework/Util.cs
index 35e795b..8ba6643 100644
--- a/OpenSim/Framework/Util.cs
+++ b/OpenSim/Framework/Util.cs
@@ -37,6 +37,8 @@ using System.Text;
 using libsecondlife;
 using Nini.Config;
 
+using System.Runtime.Serialization; 
+using System.Runtime.Serialization.Formatters.Binary; 
 namespace OpenSim.Framework
 {
     public class Util
@@ -509,7 +511,63 @@ namespace OpenSim.Framework
             {
                 return "";
             }
+        }
+
+        public static void SerializeToFile(string filename, Object obj)
+        {
+            IFormatter formatter = new BinaryFormatter();
+            Stream stream = null;
+
+            try
+            {
+                stream = new FileStream(
+                                    filename, FileMode.Create,
+                                    FileAccess.Write, FileShare.None);
+
+                formatter.Serialize(stream, obj);
+            }
+            catch (Exception e)
+            {
+                System.Console.WriteLine(e.Message);
+                System.Console.WriteLine(e.StackTrace);
+            }
+            finally
+            {
+                if (stream != null)
+                {
+                    stream.Close();
+                }
+            }
+        }
+
+        public static Object DeserializeFromFile(string filename)
+        {
+            IFormatter formatter = new BinaryFormatter();
+            Stream stream = null;
+            Object ret = null;
+
+            try
+            {
+                stream = new FileStream(
+                                    filename, FileMode.Open,
+                                    FileAccess.Read, FileShare.None);
+
+                ret = formatter.Deserialize(stream);
+            }
+            catch (Exception e)
+            {
+                System.Console.WriteLine(e.Message);
+                System.Console.WriteLine(e.StackTrace);
+            }
+            finally
+            {
+                if (stream != null)
+                {
+                    stream.Close();
+                }
+            }
 
+            return ret;
         }
     }
 }