experimental freeswitch code, imported from Rob Smart's tree

1 files changed, 571 insertions, 0 deletions

diff --git a/OpenSim/Region/OptionalModules/Avatar/Voice/FreeSwitchVoice/FreeSwitchVoiceModule.cs b/OpenSim/Region/OptionalModules/Avatar/Voice/FreeSwitchVoice/FreeSwitchVoiceModule.cs
new file mode 100644
index 0000000..a8f9de6
--- /dev/null
+++ b/OpenSim/Region/OptionalModules/Avatar/Voice/FreeSwitchVoice/FreeSwitchVoiceModule.cs
@@ -0,0 +1,571 @@
+/*
+ * 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 OpenSim 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.IO;
+using System.Net;
+using System.Web;
+using System.Text;
+using System.Xml;
+using System.Collections;
+using System.Collections.Generic;
+using System.Reflection;
+using OpenMetaverse;
+using log4net;
+using Nini.Config;
+using Nwc.XmlRpc;
+using OpenSim.Framework;
+using OpenSim.Framework.Communications.Cache;
+using OpenSim.Framework.Communications.Capabilities;
+using OpenSim.Framework.Servers;
+using OpenSim.Region.Framework.Interfaces;
+using OpenSim.Region.Framework.Scenes;
+using Caps = OpenSim.Framework.Communications.Capabilities.Caps;
+
+namespace OpenSim.Region.OptionalModules.Avatar.Voice.FreeSwitchVoice
+{
+    public class FreeSwitchVoiceModule : IRegionModule
+    {
+
+        // Infrastructure
+        private static readonly ILog m_log =
+            LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+        private static readonly bool DUMP = true;
+
+        // Capability string prefixes
+        private static readonly string m_parcelVoiceInfoRequestPath = "0007/";
+        private static readonly string m_provisionVoiceAccountRequestPath = "0008/";
+        private static readonly string m_chatSessionRequestPath = "0009/";
+
+        // Control info
+        private static bool   m_WOF = true;
+        private static bool   m_pluginEnabled  = false;
+
+        // FreeSwitch server is going to contact us and ask us all
+        // sorts of things.
+        private static string m_freeSwitchServerUser;
+        private static string m_freeSwitchServerPass;
+
+        // SLVoice client will do a GET on this prefix
+        private static string m_freeSwitchAPIPrefix;
+
+        // We need to return some information to SLVoice 
+        // figured those out via curl
+        // http://vd1.vivox.com/api2/viv_get_prelogin.php
+        //
+        // need to figure out whether we do need to return ALL of
+        // these...
+        private static string m_freeSwitchRealm;
+        private static string m_freeSwitchSIPProxy;
+        private static bool m_freeSwitchAttemptUseSTUN;
+        private static string m_freeSwitchSTUNServer;
+        private static string m_freeSwitchEchoServer;
+        private static int m_freeSwitchEchoPort;
+        private static string m_freeSwitchDefaultWellKnownIP;
+        private static int m_freeSwitchDefaultTimeout;
+        private static int m_freeSwitchSubscribeRetry;
+        private static string m_freeSwitchUrlResetPassword;
+        private static IPEndPoint m_FreeSwitchServiceIP;
+
+        private FreeSwitchDirectory m_FreeSwitchDirectory;
+        private FreeSwitchDialplan m_FreeSwitchDialplan;
+        
+        private IConfig m_config;
+
+        public void Initialise(Scene scene, IConfigSource config)
+        {
+
+            m_config = config.Configs["FreeSwitchVoice"];
+
+            if (null == m_config)
+            {
+                m_log.Info("[FreeSwitchVoice] no config found, plugin disabled");
+                return;
+            }
+
+            if (!m_config.GetBoolean("enabled", false))
+            {
+                m_log.Info("[FreeSwitchVoice] plugin disabled by configuration");
+                return;
+            }
+
+            // This is only done the FIRST time this method is invoked.
+            if (m_WOF)
+            {
+                m_pluginEnabled = true;
+                m_WOF = false;
+
+                try
+                {
+                    m_freeSwitchServerUser = m_config.GetString("freeswitch_server_user", String.Empty);
+                    m_freeSwitchServerPass = m_config.GetString("freeswitch_server_pass", String.Empty);
+                    m_freeSwitchAPIPrefix = m_config.GetString("freeswitch_api_prefix", String.Empty);
+                    
+                    // XXX: get IP address of HTTP server. (This can be this OpenSim server or another, or could be a dedicated grid service or may live on the freeswitch server)
+                     
+                    string serviceIP = m_config.GetString("freeswitch_service_server", String.Empty);
+                    int servicePort = m_config.GetInt("freeswitch_service_port", 80);
+                    IPAddress serviceIPAddress = IPAddress.Parse(serviceIP);
+                    m_FreeSwitchServiceIP = new IPEndPoint(serviceIPAddress, servicePort);
+                    
+                    m_freeSwitchRealm = m_config.GetString("freeswitch_realm", String.Empty);
+                    m_freeSwitchSIPProxy = m_config.GetString("freeswitch_sip_proxy", m_freeSwitchRealm);
+                    m_freeSwitchAttemptUseSTUN = m_config.GetBoolean("freeswitch_attempt_stun", true);
+                    m_freeSwitchSTUNServer = m_config.GetString("freeswitch_stun_server", m_freeSwitchRealm);
+                    m_freeSwitchEchoServer = m_config.GetString("freeswitch_echo_server", m_freeSwitchRealm);
+                    m_freeSwitchEchoPort = m_config.GetInt("freeswitch_echo_port", 50505);
+                    m_freeSwitchDefaultWellKnownIP = m_config.GetString("freeswitch_well_known_ip", m_freeSwitchRealm);
+                    m_freeSwitchDefaultTimeout = m_config.GetInt("freeswitch_default_timeout", 5000);
+                    m_freeSwitchSubscribeRetry = m_config.GetInt("freeswitch_subscribe_retry", 120);
+                    m_freeSwitchUrlResetPassword = m_config.GetString("freeswitch_password_reset_url", String.Empty);
+                    
+                    
+                
+
+                    if (String.IsNullOrEmpty(m_freeSwitchServerUser) ||
+                        String.IsNullOrEmpty(m_freeSwitchServerPass) ||
+                        String.IsNullOrEmpty(m_freeSwitchRealm) ||
+                        String.IsNullOrEmpty(m_freeSwitchAPIPrefix))
+                    {
+                        m_log.Error("[FreeSwitchVoice] plugin mis-configured");
+                        m_log.Info("[FreeSwitchVoice] plugin disabled: incomplete configuration");
+                        return;
+                    }
+
+                    // set up http request handlers for
+                    // - prelogin: viv_get_prelogin.php
+                    // - signin: viv_signin.php
+                    scene.CommsManager.HttpServer.AddHTTPHandler(String.Format("{0}/viv_get_prelogin.php", m_freeSwitchAPIPrefix),
+                                                                FreeSwitchSLVoiceGetPreloginHTTPHandler);
+                                                                 
+                   // RestStreamHandler h = new RestStreamHandler("GET", String.Format("{0}/viv_get_prelogin.php", m_freeSwitchAPIPrefix), FreeSwitchSLVoiceGetPreloginHTTPHandler);
+                  //  scene.CommsManager.HttpServer.AddStreamHandler(h);
+                     
+                     
+                    
+                    scene.CommsManager.HttpServer.AddHTTPHandler(String.Format("{0}/viv_signin.php", m_freeSwitchAPIPrefix),
+                                                                 FreeSwitchSLVoiceSigninHTTPHandler);
+
+                    // set up http request handlers to provide
+                    // on-demand FreeSwitch configuration to
+                    // FreeSwitch's mod_curl_xml
+                    scene.CommsManager.HttpServer.AddHTTPHandler(String.Format("{0}/freeswitch-config", m_freeSwitchAPIPrefix),
+                                                                 FreeSwitchConfigHTTPHandler);
+                    
+                    m_log.InfoFormat("[FreeSwitchVoice] using FreeSwitch server {0}", m_freeSwitchRealm);
+                    
+                    m_FreeSwitchDirectory = new FreeSwitchDirectory();
+                    m_FreeSwitchDialplan = new FreeSwitchDialplan();
+
+                    m_pluginEnabled = true;
+                    m_WOF = false;
+
+                    m_log.Info("[FreeSwitchVoice] plugin enabled");
+                }
+                catch (Exception e)
+                {
+                    m_log.ErrorFormat("[FreeSwitchVoice] plugin initialization failed: {0}", e.Message);
+                    m_log.DebugFormat("[FreeSwitchVoice] plugin initialization failed: {0}", e.ToString());
+                    return;
+                }
+            }
+
+            if (m_pluginEnabled) 
+            {
+                // we need to capture scene in an anonymous method
+                // here as we need it later in the callbacks
+                scene.EventManager.OnRegisterCaps += delegate(UUID agentID, Caps caps)
+                    {
+                        OnRegisterCaps(scene, agentID, caps);
+                    };
+
+                
+                
+            }
+        }
+        
+        public void PostInitialise()
+        {
+        }
+
+        public void Close()
+        {
+        }
+
+        public string Name
+        {
+            get { return "FreeSwitchVoiceModule"; }
+        }
+
+        public bool IsSharedModule
+        {
+            get { return true; }
+        }
+
+        
+        // <summary>
+        // OnRegisterCaps is invoked via the scene.EventManager
+        // everytime OpenSim hands out capabilities to a client
+        // (login, region crossing). We contribute two capabilities to
+        // the set of capabilities handed back to the client:
+        // ProvisionVoiceAccountRequest and ParcelVoiceInfoRequest.
+        // 
+        // ProvisionVoiceAccountRequest allows the client to obtain
+        // the voice account credentials for the avatar it is
+        // controlling (e.g., user name, password, etc).
+        // 
+        // ParcelVoiceInfoRequest is invoked whenever the client
+        // changes from one region or parcel to another.
+        //
+        // Note that OnRegisterCaps is called here via a closure
+        // delegate containing the scene of the respective region (see
+        // Initialise()).
+        // </summary>
+        public void OnRegisterCaps(Scene scene, UUID agentID, Caps caps)
+        {
+            m_log.DebugFormat("[FreeSwitchVoice] OnRegisterCaps: agentID {0} caps {1}", agentID, caps);
+
+            string capsBase = "/CAPS/" + caps.CapsObjectPath;
+            caps.RegisterHandler("ProvisionVoiceAccountRequest",
+                                 new RestStreamHandler("POST", capsBase + m_provisionVoiceAccountRequestPath,
+                                                       delegate(string request, string path, string param,
+                                                                OSHttpRequest httpRequest, OSHttpResponse httpResponse)
+                                                       {
+                                                           return ProvisionVoiceAccountRequest(scene, request, path, param,
+                                                                                               agentID, caps);
+                                                       }));
+            caps.RegisterHandler("ParcelVoiceInfoRequest",
+                                 new RestStreamHandler("POST", capsBase + m_parcelVoiceInfoRequestPath,
+                                                       delegate(string request, string path, string param,
+                                                                OSHttpRequest httpRequest, OSHttpResponse httpResponse)
+                                                       {
+                                                           return ParcelVoiceInfoRequest(scene, request, path, param,
+                                                                                         agentID, caps);
+                                                       }));
+            caps.RegisterHandler("ChatSessionRequest",
+                                 new RestStreamHandler("POST", capsBase + m_chatSessionRequestPath,
+                                                       delegate(string request, string path, string param,
+                                                                OSHttpRequest httpRequest, OSHttpResponse httpResponse)
+                                                       {
+                                                           return ChatSessionRequest(scene, request, path, param,
+                                                                                     agentID, caps);
+                                                       }));
+        }
+
+        /// <summary>
+        /// Callback for a client request for Voice Account Details
+        /// </summary>
+        /// <param name="scene">current scene object of the client</param>
+        /// <param name="request"></param>
+        /// <param name="path"></param>
+        /// <param name="param"></param>
+        /// <param name="agentID"></param>
+        /// <param name="caps"></param>
+        /// <returns></returns>
+        public string ProvisionVoiceAccountRequest(Scene scene, string request, string path, string param,
+                                                   UUID agentID, Caps caps)
+        {
+            ScenePresence avatar = scene.GetScenePresence(agentID);
+            string avatarName = avatar.Name;
+
+            try
+            {
+                m_log.DebugFormat("[FreeSwitchVoice][PROVISIONVOICE]: request: {0}, path: {1}, param: {2}",
+                                  request, path, param);
+
+                //XmlElement    resp;
+                string agentname = "x" + Convert.ToBase64String(agentID.GetBytes());
+                string password  = "1234";//temp hack//new UUID(Guid.NewGuid()).ToString().Replace('-','Z').Substring(0,16);
+
+                // XXX: we need to cache the voice credentials, as
+                // FreeSwitch is later going to come and ask us for
+                // those
+
+                agentname = agentname.Replace('+', '-').Replace('/', '_');
+
+               // LLSDVoiceAccountResponse voiceAccountResponse =
+               //     new LLSDVoiceAccountResponse(agentname, password, m_freeSwitchRealm, "http://etsvc02.hursley.ibm.com/api");
+               LLSDVoiceAccountResponse voiceAccountResponse =
+                       new LLSDVoiceAccountResponse(agentname, password, m_freeSwitchRealm,
+                                                 String.Format("http://{0}/{1}/", m_FreeSwitchServiceIP, 
+                                                               m_freeSwitchAPIPrefix)); 
+
+                string r = LLSDHelpers.SerialiseLLSDReply(voiceAccountResponse);
+
+                m_log.DebugFormat("[FreeSwitchVoice][PROVISIONVOICE]: avatar \"{0}\": {1}", avatarName, r);
+
+                return r;
+            }
+            catch (Exception e)
+            {
+                m_log.ErrorFormat("[FreeSwitchVoice][PROVISIONVOICE]: avatar \"{0}\": {1}, retry later", avatarName, e.Message);
+                m_log.DebugFormat("[FreeSwitchVoice][PROVISIONVOICE]: avatar \"{0}\": {1} failed", avatarName, e.ToString());
+
+                return "<llsd>undef</llsd>";
+            }
+        }
+
+        /// <summary>
+        /// Callback for a client request for ParcelVoiceInfo
+        /// </summary>
+        /// <param name="scene">current scene object of the client</param>
+        /// <param name="request"></param>
+        /// <param name="path"></param>
+        /// <param name="param"></param>
+        /// <param name="agentID"></param>
+        /// <param name="caps"></param>
+        /// <returns></returns>
+        public string ParcelVoiceInfoRequest(Scene scene, string request, string path, string param,
+                                             UUID agentID, Caps caps)
+        {
+            ScenePresence avatar = scene.GetScenePresence(agentID);
+            string        avatarName = avatar.Name;
+
+            // - check whether we have a region channel in our cache
+            // - if not: 
+            //       create it and cache it
+            // - send it to the client
+            // - send channel_uri: as "sip:regionID@m_sipDomain"
+            try
+            {
+                LLSDParcelVoiceInfoResponse parcelVoiceInfo;
+                string channelUri;
+
+                if (null == scene.LandChannel) 
+                    throw new Exception(String.Format("region \"{0}\": avatar \"{1}\": land data not yet available",
+                                                      scene.RegionInfo.RegionName, avatarName));
+
+
+
+                // get channel_uri: check first whether estate
+                // settings allow voice, then whether parcel allows
+                // voice, if all do retrieve or obtain the parcel
+                // voice channel
+                LandData land = scene.GetLandData(avatar.AbsolutePosition.X, avatar.AbsolutePosition.Y);
+
+                m_log.DebugFormat("[FreeSwitchVoice][PARCELVOICE]: region \"{0}\": Parcel \"{1}\" ({2}): avatar \"{3}\": request: {4}, path: {5}, param: {6}",
+                                  scene.RegionInfo.RegionName, land.Name, land.LocalID, avatarName, request, path, param);
+
+                // TODO: EstateSettings don't seem to get propagated...
+                // if (!scene.RegionInfo.EstateSettings.AllowVoice)
+                // {
+                //     m_log.DebugFormat("[FreeSwitchVoice][PARCELVOICE]: region \"{0}\": voice not enabled in estate settings",
+                //                       scene.RegionInfo.RegionName);
+                //     channel_uri = String.Empty;
+                // }
+                // else
+
+                if ((land.Flags & (uint)Parcel.ParcelFlags.AllowVoiceChat) == 0)
+                {
+                    m_log.DebugFormat("[FreeSwitchVoice][PARCELVOICE]: region \"{0}\": Parcel \"{1}\" ({2}): avatar \"{3}\": voice not enabled for parcel",
+                                      scene.RegionInfo.RegionName, land.Name, land.LocalID, avatarName);
+                    channelUri = String.Empty;
+                }
+                else
+                {
+                    channelUri = ChannelUri(scene, land);
+                }
+
+                // fill in our response to the client
+                Hashtable creds = new Hashtable();
+                creds["channel_uri"] = channelUri;
+
+                parcelVoiceInfo = new LLSDParcelVoiceInfoResponse(scene.RegionInfo.RegionName, land.LocalID, creds);
+                string r = LLSDHelpers.SerialiseLLSDReply(parcelVoiceInfo);
+
+                m_log.DebugFormat("[FreeSwitchVoice][PARCELVOICE]: region \"{0}\": Parcel \"{1}\" ({2}): avatar \"{3}\": {4}", 
+                                  scene.RegionInfo.RegionName, land.Name, land.LocalID, avatarName, r);
+                return r;
+            }
+            catch (Exception e)
+            {
+                m_log.ErrorFormat("[FreeSwitchVoice][PARCELVOICE]: region \"{0}\": avatar \"{1}\": {2}, retry later", 
+                                  scene.RegionInfo.RegionName, avatarName, e.Message);
+                m_log.DebugFormat("[FreeSwitchVoice][PARCELVOICE]: region \"{0}\": avatar \"{1}\": {2} failed", 
+                                  scene.RegionInfo.RegionName, avatarName, e.ToString());
+
+                return "<llsd>undef</llsd>";
+            }
+        }
+
+
+        /// <summary>
+        /// Callback for a client request for ChatSessionRequest
+        /// </summary>
+        /// <param name="scene">current scene object of the client</param>
+        /// <param name="request"></param>
+        /// <param name="path"></param>
+        /// <param name="param"></param>
+        /// <param name="agentID"></param>
+        /// <param name="caps"></param>
+        /// <returns></returns>
+        public string ChatSessionRequest(Scene scene, string request, string path, string param,
+                                         UUID agentID, Caps caps)
+        {
+            ScenePresence avatar = scene.GetScenePresence(agentID);
+            string        avatarName = avatar.Name;
+
+            m_log.DebugFormat("[FreeSwitchVoice][CHATSESSION]: avatar \"{0}\": request: {1}, path: {2}, param: {3}",
+                              avatarName, request, path, param);
+            return "<llsd>true</llsd>";
+        }
+
+
+        public Hashtable FreeSwitchSLVoiceGetPreloginHTTPHandler(Hashtable request)
+        {
+            m_log.Debug("[FreeSwitchVoice] FreeSwitchSLVoiceGetPreloginHTTPHandler called");
+            
+            Hashtable response = new Hashtable();
+            response["content_type"] = "text/xml";
+            response["keepalive"] = false;
+            
+            response["str_response_string"] = String.Format( 
+                "<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n" +
+                "<VCConfiguration>\r\n"+
+                    "<DefaultRealm>{0}</DefaultRealm>\r\n" +
+                    "<DefaultSIPProxy>{1}</DefaultSIPProxy>\r\n"+
+                    "<DefaultAttemptUseSTUN>{2}</DefaultAttemptUseSTUN>\r\n"+
+                    "<DefaultEchoServer>{3}</DefaultEchoServer>\r\n"+
+                    "<DefaultEchoPort>{4}</DefaultEchoPort>\r\n"+
+                    "<DefaultWellKnownIP>{5}</DefaultWellKnownIP>\r\n"+
+                    "<DefaultTimeout>{6}</DefaultTimeout>\r\n"+
+                    "<UrlResetPassword>{7}</UrlResetPassword>\r\n"+
+                    "<UrlPrivacyNotice>{8}</UrlPrivacyNotice>\r\n"+
+                    "<UrlEulaNotice/>\r\n"+
+                    "<App.NoBottomLogo>false</App.NoBottomLogo>\r\n"+
+                "</VCConfiguration>"
+              , 
+                m_freeSwitchRealm,m_freeSwitchSIPProxy,m_freeSwitchAttemptUseSTUN,
+                m_freeSwitchSTUNServer,m_freeSwitchEchoServer,m_freeSwitchEchoPort,
+                m_freeSwitchDefaultWellKnownIP,m_freeSwitchDefaultTimeout,m_freeSwitchUrlResetPassword,"");
+            
+            response["int_response_code"] = 200;
+
+            m_log.DebugFormat("[FreeSwitchVoice] FreeSwitchSLVoiceGetPreloginHTTPHandler return {0}",response["str_response_string"]);
+            return response;
+        }
+
+        public Hashtable FreeSwitchSLVoiceSigninHTTPHandler(Hashtable request)
+        {
+            m_log.Debug("[FreeSwitchVoice] FreeSwitchSLVoiceSigninHTTPHandler called");
+             
+            Hashtable response = new Hashtable();
+            response["str_response_string"] = @"<response xsi:schemaLocation=""/xsd/error.xsd"">
+                    <level0>
+                        <status>OK</status>
+                        <body>
+                        <code>200</code>
+                        <msg>auth successful</msg>
+                        </body>
+                    </level0>
+                </response>";
+            response["int_response_code"] = 200;
+            return response;
+        }
+
+
+        public Hashtable FreeSwitchConfigHTTPHandler(Hashtable request)
+        {
+            m_log.DebugFormat("[FreeSwitchVoice] FreeSwitchConfigHTTPHandler called with {0}",request.ToString());
+            
+            Hashtable response = new Hashtable();
+            
+            // all the params come as NVPs in the request body
+            Hashtable requestBody = parseRequestBody((string) request["body"]);
+            
+            // is this a dialplan or directory request 
+            string section = (string) requestBody["section"];
+            
+            if(section=="directory")
+                response = m_FreeSwitchDirectory.HandleDirectoryRequest(requestBody);
+            else if (section=="dialplan")
+                response = m_FreeSwitchDialplan.HandleDialplanRequest(requestBody);
+            
+            // XXX: re-generate dialplan: 
+            //      - conf == region UUID
+            //      - conf number = region port
+            //      -> TODO Initialise(): keep track of regions via events
+            //      re-generate accounts for all avatars 
+            //      -> TODO Initialise(): keep track of avatars via events
+            m_log.DebugFormat("[FreeSwitchVoice] FreeSwitchConfigHTTPHandler return {0}",response["str_response_string"]);
+            return response;
+        }
+        
+        public Hashtable parseRequestBody(string body)
+        {
+            Hashtable bodyParams = new Hashtable();
+            // split string
+            string [] nvps = body.Split(new Char [] {'&'});
+
+            foreach (string s in nvps) {
+    
+                if (s.Trim() != "")
+                {
+                    string [] nvp = s.Split(new Char [] {'='});
+                    bodyParams.Add(HttpUtility.UrlDecode(nvp[0]),HttpUtility.UrlDecode(nvp[1]));
+                }
+            }
+            
+            return bodyParams;
+            
+        }
+
+        private string ChannelUri(Scene scene, LandData land)
+        {
+
+            string channelUri = null;
+
+            string landUUID;
+            string landName;
+
+            // Create parcel voice channel. If no parcel exists, then the voice channel ID is the same
+            // as the directory ID. Otherwise, it reflects the parcel's ID.
+
+            if (land.LocalID != 1 && (land.Flags & (uint)Parcel.ParcelFlags.UseEstateVoiceChan) == 0)
+            {
+                landName = String.Format("{0}:{1}", scene.RegionInfo.RegionName, land.Name);
+                landUUID = land.GlobalID.ToString();
+                m_log.DebugFormat("[FreeSwitchVoice]: Region:Parcel \"{0}\": parcel id {1}: using channel name {2}", 
+                                  landName, land.LocalID, landUUID);
+            }
+            else
+            {
+                landName = String.Format("{0}:{1}", scene.RegionInfo.RegionName, scene.RegionInfo.RegionName);
+                landUUID = scene.RegionInfo.RegionID.ToString();
+                m_log.DebugFormat("[FreeSwitchVoice]: Region:Parcel \"{0}\": parcel id {1}: using channel name {2}", 
+                                  landName, land.LocalID, landUUID);
+            }
+            System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
+            channelUri = String.Format("sip:confctl-{0}@{1}", "x" + Convert.ToBase64String(encoding.GetBytes(landUUID)), m_freeSwitchRealm);
+            
+            //channelUri="sip:confctl-3001@9.20.151.43";
+            //channelUri="sip:opensimconf-3001@9.20.151.43";
+
+            return channelUri;
+        }
+    }
+}