Merge branch 'master' into careminster-presence-refactor

This brings careminster on the level of master. To be tested

1 files changed, 650 insertions, 0 deletions

diff --git a/OpenSim/Services/LLLoginService/LLLoginService.cs b/OpenSim/Services/LLLoginService/LLLoginService.cs
new file mode 100644
index 0000000..143e5f1
--- /dev/null
+++ b/OpenSim/Services/LLLoginService/LLLoginService.cs
@@ -0,0 +1,650 @@
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Reflection;
+using System.Text.RegularExpressions;
+
+using log4net;
+using Nini.Config;
+using OpenMetaverse;
+
+using OpenSim.Framework;
+using OpenSim.Framework.Capabilities;
+using OpenSim.Framework.Console;
+using OpenSim.Server.Base;
+using OpenSim.Services.Interfaces;
+using GridRegion = OpenSim.Services.Interfaces.GridRegion;
+using FriendInfo = OpenSim.Services.Interfaces.FriendInfo;
+using OpenSim.Services.Connectors.Hypergrid;
+
+namespace OpenSim.Services.LLLoginService
+{
+    public class LLLoginService : ILoginService
+    {
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+        private static bool Initialized = false;
+
+        private IUserAccountService m_UserAccountService;
+        private IAuthenticationService m_AuthenticationService;
+        private IInventoryService m_InventoryService;
+        private IGridService m_GridService;
+        private IPresenceService m_PresenceService;
+        private ISimulationService m_LocalSimulationService;
+        private ISimulationService m_RemoteSimulationService;
+        private ILibraryService m_LibraryService;
+        private IFriendsService m_FriendsService;
+        private IAvatarService m_AvatarService;
+        private IUserAgentService m_UserAgentService;
+
+        private GatekeeperServiceConnector m_GatekeeperConnector;
+
+        private string m_DefaultRegionName;
+        private string m_WelcomeMessage;
+        private bool m_RequireInventory;
+        private int m_MinLoginLevel;
+        private string m_GatekeeperURL;
+
+        IConfig m_LoginServerConfig;
+
+        public LLLoginService(IConfigSource config, ISimulationService simService, ILibraryService libraryService)
+        {
+            m_LoginServerConfig = config.Configs["LoginService"];
+            if (m_LoginServerConfig == null)
+                throw new Exception(String.Format("No section LoginService in config file"));
+
+            string accountService = m_LoginServerConfig.GetString("UserAccountService", String.Empty);
+            string agentService = m_LoginServerConfig.GetString("UserAgentService", String.Empty);
+            string authService = m_LoginServerConfig.GetString("AuthenticationService", String.Empty);
+            string invService = m_LoginServerConfig.GetString("InventoryService", String.Empty);
+            string gridService = m_LoginServerConfig.GetString("GridService", String.Empty);
+            string presenceService = m_LoginServerConfig.GetString("PresenceService", String.Empty);
+            string libService = m_LoginServerConfig.GetString("LibraryService", String.Empty);
+            string friendsService = m_LoginServerConfig.GetString("FriendsService", String.Empty);
+            string avatarService = m_LoginServerConfig.GetString("AvatarService", String.Empty);
+            string simulationService = m_LoginServerConfig.GetString("SimulationService", String.Empty);
+
+            m_DefaultRegionName = m_LoginServerConfig.GetString("DefaultRegion", String.Empty);
+            m_WelcomeMessage = m_LoginServerConfig.GetString("WelcomeMessage", "Welcome to OpenSim!");
+            m_RequireInventory = m_LoginServerConfig.GetBoolean("RequireInventory", true);
+            m_GatekeeperURL = m_LoginServerConfig.GetString("GatekeeperURI", string.Empty);
+
+            // These are required; the others aren't
+            if (accountService == string.Empty || authService == string.Empty)
+                throw new Exception("LoginService is missing service specifications");
+
+            Object[] args = new Object[] { config };
+            m_UserAccountService = ServerUtils.LoadPlugin<IUserAccountService>(accountService, args);
+            m_AuthenticationService = ServerUtils.LoadPlugin<IAuthenticationService>(authService, args);
+            m_InventoryService = ServerUtils.LoadPlugin<IInventoryService>(invService, args);
+            if (gridService != string.Empty)
+                m_GridService = ServerUtils.LoadPlugin<IGridService>(gridService, args);
+            if (presenceService != string.Empty)
+                m_PresenceService = ServerUtils.LoadPlugin<IPresenceService>(presenceService, args);
+            if (avatarService != string.Empty)
+                m_AvatarService = ServerUtils.LoadPlugin<IAvatarService>(avatarService, args);
+            if (friendsService != string.Empty)
+                m_FriendsService = ServerUtils.LoadPlugin<IFriendsService>(friendsService, args);
+            if (simulationService != string.Empty)
+                m_RemoteSimulationService = ServerUtils.LoadPlugin<ISimulationService>(simulationService, args);
+            if (agentService != string.Empty)
+                m_UserAgentService = ServerUtils.LoadPlugin<IUserAgentService>(agentService, args);
+
+            //
+            // deal with the services given as argument
+            //
+            m_LocalSimulationService = simService;
+            if (libraryService != null)
+            {
+                m_log.DebugFormat("[LLOGIN SERVICE]: Using LibraryService given as argument");
+                m_LibraryService = libraryService;
+            }
+            else if (libService != string.Empty)
+            {
+                m_log.DebugFormat("[LLOGIN SERVICE]: Using instantiated LibraryService");
+                m_LibraryService = ServerUtils.LoadPlugin<ILibraryService>(libService, args);
+            }
+
+            m_GatekeeperConnector = new GatekeeperServiceConnector();
+
+            if (!Initialized)
+            {
+                Initialized = true;
+                RegisterCommands();
+            }
+
+            m_log.DebugFormat("[LLOGIN SERVICE]: Starting...");
+
+        }
+
+        public LLLoginService(IConfigSource config) : this(config, null, null)
+        {
+        }
+
+        public LoginResponse Login(string firstName, string lastName, string passwd, string startLocation, IPEndPoint clientIP)
+        {
+            bool success = false;
+            UUID session = UUID.Random();
+
+            try
+            {
+                //
+                // Get the account and check that it exists
+                //
+                UserAccount account = m_UserAccountService.GetUserAccount(UUID.Zero, firstName, lastName);
+                if (account == null)
+                {
+                    m_log.InfoFormat("[LLOGIN SERVICE]: Login failed, reason: user not found");
+                    return LLFailedLoginResponse.UserProblem;
+                }
+
+                if (account.UserLevel < m_MinLoginLevel)
+                {
+                    m_log.InfoFormat("[LLOGIN SERVICE]: Login failed, reason: login is blocked for user level {0}", account.UserLevel);
+                    return LLFailedLoginResponse.LoginBlockedProblem;
+                }
+
+                //
+                // Authenticate this user
+                //
+                if (!passwd.StartsWith("$1$"))
+                    passwd = "$1$" + Util.Md5Hash(passwd);
+                passwd = passwd.Remove(0, 3); //remove $1$
+                string token = m_AuthenticationService.Authenticate(account.PrincipalID, passwd, 30);
+                UUID secureSession = UUID.Zero;
+                if ((token == string.Empty) || (token != string.Empty && !UUID.TryParse(token, out secureSession)))
+                {
+                    m_log.InfoFormat("[LLOGIN SERVICE]: Login failed, reason: authentication failed");
+                    return LLFailedLoginResponse.UserProblem;
+                }
+
+                //
+                // Get the user's inventory
+                //
+                if (m_RequireInventory && m_InventoryService == null)
+                {
+                    m_log.WarnFormat("[LLOGIN SERVICE]: Login failed, reason: inventory service not set up");
+                    return LLFailedLoginResponse.InventoryProblem;
+                }
+                List<InventoryFolderBase> inventorySkel = m_InventoryService.GetInventorySkeleton(account.PrincipalID);
+                if (m_RequireInventory && ((inventorySkel == null) || (inventorySkel != null && inventorySkel.Count == 0)))
+                {
+                    m_log.InfoFormat("[LLOGIN SERVICE]: Login failed, reason: unable to retrieve user inventory");
+                    return LLFailedLoginResponse.InventoryProblem;
+                }
+
+                //
+                // Login the presence
+                //
+                PresenceInfo presence = null;
+                GridRegion home = null;
+                if (m_PresenceService != null)
+                {
+                    success = m_PresenceService.LoginAgent(account.PrincipalID.ToString(), session, secureSession);
+                    if (!success)
+                    {
+                        m_log.InfoFormat("[LLOGIN SERVICE]: Login failed, reason: could not login presence");
+                        return LLFailedLoginResponse.GridProblem;
+                    }
+
+                    // Get the updated presence info
+                    presence = m_PresenceService.GetAgent(session);
+
+                    // Get the home region
+                    if ((presence.HomeRegionID != UUID.Zero) && m_GridService != null)
+                    {
+                        home = m_GridService.GetRegionByUUID(account.ScopeID, presence.HomeRegionID);
+                    }
+                }
+
+                //
+                // Find the destination region/grid
+                //
+                string where = string.Empty;
+                Vector3 position = Vector3.Zero;
+                Vector3 lookAt = Vector3.Zero;
+                GridRegion gatekeeper = null;
+                GridRegion destination = FindDestination(account, presence, session, startLocation, out gatekeeper, out where, out position, out lookAt);
+                if (destination == null)
+                {
+                    m_PresenceService.LogoutAgent(session, presence.Position, presence.LookAt);
+                    m_log.InfoFormat("[LLOGIN SERVICE]: Login failed, reason: destination not found");
+                    return LLFailedLoginResponse.GridProblem;
+                }
+
+                //
+                // Get the avatar
+                //
+                AvatarData avatar = null;
+                if (m_AvatarService != null)
+                {
+                    avatar = m_AvatarService.GetAvatar(account.PrincipalID);
+                }
+
+                //
+                // Instantiate/get the simulation interface and launch an agent at the destination
+                //
+                string reason = string.Empty;
+                AgentCircuitData aCircuit = LaunchAgentAtGrid(gatekeeper, destination, account, avatar, session, secureSession, position, where, out where, out reason);
+
+                if (aCircuit == null)
+                {
+                    m_PresenceService.LogoutAgent(session, presence.Position, presence.LookAt);
+                    m_log.InfoFormat("[LLOGIN SERVICE]: Login failed, reason: {0}", reason);
+                    return LLFailedLoginResponse.AuthorizationProblem;
+
+                }
+                // Get Friends list 
+                FriendInfo[] friendsList = new FriendInfo[0];
+                if (m_FriendsService != null)
+                {
+                    friendsList = m_FriendsService.GetFriends(account.PrincipalID);
+                    m_log.DebugFormat("[LLOGIN SERVICE]: Retrieved {0} friends", friendsList.Length);
+                }
+
+                //
+                // Finally, fill out the response and return it
+                //
+                LLLoginResponse response = new LLLoginResponse(account, aCircuit, presence, destination, inventorySkel, friendsList, m_LibraryService,
+                    where, startLocation, position, lookAt, m_WelcomeMessage, home, clientIP);
+
+                return response;
+            }
+            catch (Exception e)
+            {
+                m_log.WarnFormat("[LLOGIN SERVICE]: Exception processing login for {0} {1}: {2}", firstName, lastName, e.ToString());
+                if (m_PresenceService != null)
+                    m_PresenceService.LogoutAgent(session, new Vector3(128, 128, 0), new Vector3(0, 1, 0));
+                return LLFailedLoginResponse.InternalError;
+            }
+        }
+
+        private GridRegion FindDestination(UserAccount account, PresenceInfo pinfo, UUID sessionID, string startLocation, out GridRegion gatekeeper, out string where, out Vector3 position, out Vector3 lookAt)
+        {
+            m_log.DebugFormat("[LLOGIN SERVICE]: FindDestination for start location {0}", startLocation);
+
+            gatekeeper = null;
+            where = "home";
+            position = new Vector3(128, 128, 0);
+            lookAt = new Vector3(0, 1, 0);
+
+            if (m_GridService == null)
+                return null;
+
+            if (startLocation.Equals("home"))
+            {
+                // logging into home region
+                if (pinfo == null)
+                    return null;
+
+                GridRegion region = null;
+
+                if (pinfo.HomeRegionID.Equals(UUID.Zero) || (region = m_GridService.GetRegionByUUID(account.ScopeID, pinfo.HomeRegionID)) == null)
+                {
+                    List<GridRegion> defaults = m_GridService.GetDefaultRegions(account.ScopeID);
+                    if (defaults != null && defaults.Count > 0)
+                    {
+                        region = defaults[0];
+                        where = "safe";
+                    }
+                    else
+                        m_log.WarnFormat("[LLOGIN SERVICE]: User {0} {1} does not have a home set and this grid does not have default locations.",
+                            account.FirstName, account.LastName);
+                }
+
+                return region;
+            }
+            else if (startLocation.Equals("last"))
+            {
+                // logging into last visited region
+                where = "last";
+
+                if (pinfo == null)
+                    return null;
+
+                GridRegion region = null;
+
+                if (pinfo.RegionID.Equals(UUID.Zero) || (region = m_GridService.GetRegionByUUID(account.ScopeID, pinfo.RegionID)) == null)
+                {
+                    List<GridRegion> defaults = m_GridService.GetDefaultRegions(account.ScopeID);
+                    if (defaults != null && defaults.Count > 0)
+                    {
+                        region = defaults[0];
+                        where = "safe";
+                    }
+                }
+                else
+                {
+                    position = pinfo.Position;
+                    lookAt = pinfo.LookAt;
+                }
+                return region;
+
+            }
+            else
+            {
+                // free uri form
+                // e.g. New Moon&135&46  New Moon@osgrid.org:8002&153&34
+                where = "url";
+                Regex reURI = new Regex(@"^uri:(?<region>[^&]+)&(?<x>\d+)&(?<y>\d+)&(?<z>\d+)$");
+                Match uriMatch = reURI.Match(startLocation);
+                if (uriMatch == null)
+                {
+                    m_log.InfoFormat("[LLLOGIN SERVICE]: Got Custom Login URI {0}, but can't process it", startLocation);
+                    return null;
+                }
+                else
+                {
+                    position = new Vector3(float.Parse(uriMatch.Groups["x"].Value),
+                                           float.Parse(uriMatch.Groups["y"].Value),
+                                           float.Parse(uriMatch.Groups["z"].Value));
+
+                    string regionName = uriMatch.Groups["region"].ToString();
+                    if (regionName != null)
+                    {
+                        if (!regionName.Contains("@"))
+                        {
+
+                            List<GridRegion> regions = m_GridService.GetRegionsByName(account.ScopeID, regionName, 1);
+                            if ((regions == null) || (regions != null && regions.Count == 0))
+                            {
+                                m_log.InfoFormat("[LLLOGIN SERVICE]: Got Custom Login URI {0}, can't locate region {1}. Trying defaults.", startLocation, regionName);
+                                regions = m_GridService.GetDefaultRegions(UUID.Zero);
+                                if (regions != null && regions.Count > 0)
+                                {
+                                    where = "safe"; 
+                                    return regions[0];
+                                }
+                                else
+                                {
+                                    m_log.InfoFormat("[LLLOGIN SERVICE]: Got Custom Login URI {0}, Grid does not provide default regions.", startLocation);
+                                    return null;
+                                }
+                            }
+                            return regions[0];
+                        }
+                        else
+                        {
+                            if (m_UserAgentService == null)
+                            {
+                                m_log.WarnFormat("[LLLOGIN SERVICE]: This llogin service is not running a user agent service, as such it can't lauch agents at foreign grids");
+                                return null;
+                            }
+                            string[] parts = regionName.Split(new char[] { '@' });
+                            if (parts.Length < 2)
+                            {
+                                m_log.InfoFormat("[LLLOGIN SERVICE]: Got Custom Login URI {0}, can't locate region {1}", startLocation, regionName);
+                                return null;
+                            }
+                            // Valid specification of a remote grid
+                            regionName = parts[0];
+                            string domainLocator = parts[1];
+                            parts = domainLocator.Split(new char[] {':'});
+                            string domainName = parts[0];
+                            uint port = 0;
+                            if (parts.Length > 1)
+                                UInt32.TryParse(parts[1], out port);
+                            GridRegion region = FindForeignRegion(domainName, port, regionName, out gatekeeper);
+                            return region;
+                        }
+                    }
+                    else
+                    {
+                        List<GridRegion> defaults = m_GridService.GetDefaultRegions(account.ScopeID);
+                        if (defaults != null && defaults.Count > 0)
+                        {
+                            where = "safe"; 
+                            return defaults[0];
+                        }
+                        else
+                            return null;
+                    }
+                }
+                //response.LookAt = "[r0,r1,r0]";
+                //// can be: last, home, safe, url
+                //response.StartLocation = "url";
+
+            }
+
+        }
+
+        private GridRegion FindForeignRegion(string domainName, uint port, string regionName, out GridRegion gatekeeper)
+        {
+            gatekeeper = new GridRegion();
+            gatekeeper.ExternalHostName = domainName;
+            gatekeeper.HttpPort = port;
+            gatekeeper.RegionName = regionName;
+            gatekeeper.InternalEndPoint = new IPEndPoint(IPAddress.Parse("0.0.0.0"), 0);
+
+            UUID regionID;
+            ulong handle;
+            string imageURL = string.Empty, reason = string.Empty;
+            if (m_GatekeeperConnector.LinkRegion(gatekeeper, out regionID, out handle, out domainName, out imageURL, out reason))
+            {
+                GridRegion destination = m_GatekeeperConnector.GetHyperlinkRegion(gatekeeper, regionID);
+                return destination;
+            }
+
+            return null;
+        }
+
+        private string hostName = string.Empty;
+        private int port = 0;
+
+        private void SetHostAndPort(string url)
+        {
+            try
+            {
+                Uri uri = new Uri(url);
+                hostName = uri.Host;
+                port = uri.Port;
+            }
+            catch
+            {
+                m_log.WarnFormat("[LLLogin SERVICE]: Unable to parse GatekeeperURL {0}", url);
+            }
+        }
+
+        private AgentCircuitData LaunchAgentAtGrid(GridRegion gatekeeper, GridRegion destination, UserAccount account, AvatarData avatar,
+            UUID session, UUID secureSession, Vector3 position, string currentWhere, out string where, out string reason)
+        {
+            where = currentWhere;
+            ISimulationService simConnector = null;
+            reason = string.Empty;
+            uint circuitCode = 0;
+            AgentCircuitData aCircuit = null;
+
+            if (m_UserAgentService == null)
+            {
+                // HG standalones have both a localSimulatonDll and a remoteSimulationDll
+                // non-HG standalones have just a localSimulationDll
+                // independent login servers have just a remoteSimulationDll
+                if (m_LocalSimulationService != null)
+                    simConnector = m_LocalSimulationService;
+                else if (m_RemoteSimulationService != null)
+                    simConnector = m_RemoteSimulationService;
+            }
+            else // User Agent Service is on
+            {
+                if (gatekeeper == null) // login to local grid
+                {
+                    if (hostName == string.Empty)
+                        SetHostAndPort(m_GatekeeperURL);
+
+                    gatekeeper = new GridRegion(destination);
+                    gatekeeper.ExternalHostName = hostName;
+                    gatekeeper.HttpPort = (uint)port;
+
+                }
+                else // login to foreign grid
+                {
+                }
+            }
+
+            bool success = false;
+
+            if (m_UserAgentService == null && simConnector != null)
+            {
+                circuitCode = (uint)Util.RandomClass.Next(); ;
+                aCircuit = MakeAgent(destination, account, avatar, session, secureSession, circuitCode, position);
+                success = LaunchAgentDirectly(simConnector, destination, aCircuit, out reason);
+                if (!success && m_GridService != null)
+                {
+                    // Try the fallback regions
+                    List<GridRegion> fallbacks = m_GridService.GetFallbackRegions(account.ScopeID, destination.RegionLocX, destination.RegionLocY);
+                    if (fallbacks != null)
+                    {
+                        foreach (GridRegion r in fallbacks)
+                        {
+                            success = LaunchAgentDirectly(simConnector, r, aCircuit, out reason);
+                            if (success)
+                            {
+                                where = "safe";
+                                destination = r;
+                                break;
+                            }
+                        }
+                    }
+                }
+            }
+
+            if (m_UserAgentService != null)
+            {
+                circuitCode = (uint)Util.RandomClass.Next(); ;
+                aCircuit = MakeAgent(destination, account, avatar, session, secureSession, circuitCode, position);
+                success = LaunchAgentIndirectly(gatekeeper, destination, aCircuit, out reason);
+                if (!success && m_GridService != null)
+                {
+                    // Try the fallback regions
+                    List<GridRegion> fallbacks = m_GridService.GetFallbackRegions(account.ScopeID, destination.RegionLocX, destination.RegionLocY);
+                    if (fallbacks != null)
+                    {
+                        foreach (GridRegion r in fallbacks)
+                        {
+                            success = LaunchAgentIndirectly(gatekeeper, r, aCircuit, out reason);
+                            if (success)
+                            {
+                                where = "safe";
+                                destination = r;
+                                break;
+                            }
+                        }
+                    }
+                }
+            }
+
+            if (success)
+                return aCircuit;
+            else
+                return null;
+        }
+
+        private AgentCircuitData MakeAgent(GridRegion region, UserAccount account, 
+            AvatarData avatar, UUID session, UUID secureSession, uint circuit, Vector3 position)
+        {
+            AgentCircuitData aCircuit = new AgentCircuitData();
+
+            aCircuit.AgentID = account.PrincipalID;
+            if (avatar != null)
+                aCircuit.Appearance = avatar.ToAvatarAppearance(account.PrincipalID);
+            else
+                aCircuit.Appearance = new AvatarAppearance(account.PrincipalID);
+
+            //aCircuit.BaseFolder = irrelevant
+            aCircuit.CapsPath = CapsUtil.GetRandomCapsObjectPath();
+            aCircuit.child = false; // the first login agent is root
+            aCircuit.ChildrenCapSeeds = new Dictionary<ulong, string>();
+            aCircuit.circuitcode = circuit;
+            aCircuit.firstname = account.FirstName;
+            //aCircuit.InventoryFolder = irrelevant
+            aCircuit.lastname = account.LastName;
+            aCircuit.SecureSessionID = secureSession;
+            aCircuit.SessionID = session;
+            aCircuit.startpos = position;
+            SetServiceURLs(aCircuit, account);
+
+            return aCircuit;
+
+            //m_UserAgentService.LoginAgentToGrid(aCircuit, GatekeeperServiceConnector, region, out reason);
+            //if (simConnector.CreateAgent(region, aCircuit, 0, out reason))
+            //    return aCircuit;
+
+            //return null;
+
+        }
+
+        private void SetServiceURLs(AgentCircuitData aCircuit, UserAccount account)
+        {
+            aCircuit.ServiceURLs = new Dictionary<string, object>();
+            if (account.ServiceURLs == null)
+                return;
+
+            foreach (KeyValuePair<string, object> kvp in account.ServiceURLs)
+            {
+                if (kvp.Value == null || (kvp.Value != null && kvp.Value.ToString() == string.Empty))
+                {
+                    aCircuit.ServiceURLs[kvp.Key] = m_LoginServerConfig.GetString(kvp.Key, string.Empty);
+                }
+                else
+                {
+                    aCircuit.ServiceURLs[kvp.Key] = kvp.Value;
+                }
+            }
+        }
+
+        private bool LaunchAgentDirectly(ISimulationService simConnector, GridRegion region, AgentCircuitData aCircuit, out string reason)
+        {
+            return simConnector.CreateAgent(region, aCircuit, (int)Constants.TeleportFlags.ViaLogin, out reason);
+        }
+
+        private bool LaunchAgentIndirectly(GridRegion gatekeeper, GridRegion destination, AgentCircuitData aCircuit, out string reason)
+        {
+            m_log.Debug("[LLOGIN SERVICE] Launching agent at " + destination.RegionName);
+            return m_UserAgentService.LoginAgentToGrid(aCircuit, gatekeeper, destination, out reason);
+        }
+
+        #region Console Commands
+        private void RegisterCommands()
+        {
+            //MainConsole.Instance.Commands.AddCommand
+            MainConsole.Instance.Commands.AddCommand("loginservice", false, "login level",
+                    "login level <level>",
+                    "Set the minimum user level to log in", HandleLoginCommand);
+
+            MainConsole.Instance.Commands.AddCommand("loginservice", false, "login reset",
+                    "login reset",
+                    "Reset the login level to allow all users",
+                    HandleLoginCommand);
+
+            MainConsole.Instance.Commands.AddCommand("loginservice", false, "login text",
+                    "login text <text>",
+                    "Set the text users will see on login", HandleLoginCommand);
+
+        }
+
+        private void HandleLoginCommand(string module, string[] cmd)
+        {
+            string subcommand = cmd[1];
+
+            switch (subcommand)
+            {
+                case "level":
+                    // Set the minimum level to allow login 
+                    // Useful to allow grid update without worrying about users.
+                    // or fixing critical issues
+                    //
+                    if (cmd.Length > 2)
+                        Int32.TryParse(cmd[2], out m_MinLoginLevel);
+                    break;
+                case "reset":
+                    m_MinLoginLevel = 0;
+                    break;
+                case "text":
+                    if (cmd.Length > 2)
+                        m_WelcomeMessage = cmd[2];
+                    break;
+            }
+        }
+    }
+
+    #endregion
+}