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STUN Client

, 20 Apr 2007 CPOL
STUN client C# implementation with sample application
Stun.zip
Stun
Net
docs
dns
dns_records.jpg
dns_records.vsd
Net
_junk
_Obsolete
_Stuff
AUTH
bin
Release
LumiSoft.Net.dll
Data
Dns
Client
FTP
Client
Server
HTTP
Server
ICMP
IMAP
Client
Server
IO
Log
LumiSoft.Net
Mime
vCard
Net.csproj.user
Net.suo
NNTP
Client
POP3
Client
Server
SDP
ServersCore
SIP
Client
Message
Proxy
Stack
SMTP
Client
Server
STUN
Client
Message
STUN_Client_app
STUN_Client_app.suo
STUN_Client_app
bin
Debug
LumiSoft.Net.dll
STUN_Client_app.exe
STUN_Client_app.vshost.exe
dep
LumiSoft.Net.dll
Properties
Settings.settings
using System;
using System.Collections.Generic;
using System.Text;
using System.Net;

namespace LumiSoft.Net.SIP
{
    /// <summary>
    /// SIP helper methods.
    /// </summary>
    public class SIP_Utils
    {
        #region method ParseAddress

        /// <summary>
        /// Parses address from SIP To: header field.
        /// </summary>
        /// <param name="to">SIP header To: value.</param>
        /// <returns></returns>
        public static string ParseAddress(string to)
        {
            try{
                string retVal = to;
                if(to.IndexOf('<') > -1 && to.IndexOf('<') < to.IndexOf('>')){
                    retVal = to.Substring(to.IndexOf('<') + 1,to.IndexOf('>') - to.IndexOf('<') - 1);
                }
                // Remove sip:
                if(retVal.IndexOf(':') > -1){
                    retVal = retVal.Substring(retVal.IndexOf(':') + 1).Split(':')[0];
                }
                return retVal;
            }
            catch{
                throw new ArgumentException("Invalid SIP header To: '" + to + "' value !");
            }
        }

        #endregion

        #region method UriToRequestUri

        /// <summary>
        /// Converts URI to Request-URI by removing all not allowed Request-URI parameters from URI.
        /// </summary>
        /// <param name="uri">URI value.</param>
        /// <returns>Returns valid Request-URI value.</returns>
        public static string UriToRequestUri(string uri)
        {            
            // RFC 3261 19.1.2.(Table)
            // We need to strip off "method-param" and "header" URI parameters".
            // Currently we do it for sip or sips uri, do we need todo it for others too ?
            try{
                SIP_Uri sUri = SIP_Uri.Parse(uri);
                sUri.Parameters.Remove("method");
                sUri.Header = null;
                return sUri.ToStringValue();
            }
            catch{
                return uri;
            }            
        }

        #endregion
    }
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Ivar Lumi
Estonia Estonia
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