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STUN Client

, 20 Apr 2007
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;

namespace LumiSoft.Net.SIP.Message
{
    /// <summary>
    /// Implements SIP "Replaces" value. Defined in RFC 3891.
    /// </summary>
    /// <remarks>
    /// <code>
    /// RFC 3891 Syntax:
    ///     Replaces        = callid *(SEMI replaces-param)
    ///     replaces-param  = to-tag / from-tag / early-flag / generic-param
    ///     to-tag          = "to-tag" EQUAL token
    ///     from-tag        = "from-tag" EQUAL token
    ///     early-flag      = "early-only"
    /// </code>
    /// </remarks>
    public class SIP_t_Replaces : SIP_t_ValueWithParams
    {
        private string m_CallID = "";

        /// <summary>
        /// Default constructor.
        /// </summary>
        public SIP_t_Replaces()
        {
        }


        #region method Parse
        
        /// <summary>
        /// Parses "Replaces" from specified value.
        /// </summary>
        /// <param name="value">SIP "Replaces" value.</param>
        /// <exception cref="ArgumentNullException">Raised when <b>value</b> is null.</exception>
        /// <exception cref="SIP_ParseException">Raised when invalid SIP message.</exception>
        public void Parse(string value)
        {
            if(value == null){
                throw new ArgumentNullException("value");
            }

            Parse(new StringReader(value));
        }

        /// <summary>
        /// Parses "Replaces" from specified reader.
        /// </summary>
        /// <param name="reader">Reader from where to parse.</param>
        /// <exception cref="ArgumentNullException">Raised when <b>reader</b> is null.</exception>
        /// <exception cref="SIP_ParseException">Raised when invalid SIP message.</exception>
        public override void Parse(StringReader reader)
        {
            /*
                Replaces        = callid *(SEMI replaces-param)
                replaces-param  = to-tag / from-tag / early-flag / generic-param
                to-tag          = "to-tag" EQUAL token
                from-tag        = "from-tag" EQUAL token
                early-flag      = "early-only"    
            */

            if(reader == null){
                throw new ArgumentNullException("reader");
            }

            // callid
            string word = reader.ReadWord();
            if(word == null){
                throw new SIP_ParseException("Replaces 'callid' value is missing !");
            }
            m_CallID = word;

            // Parse parameters
            ParseParameters(reader);
        }

        #endregion

        #region method ToStringValue

        /// <summary>
        /// Converts this to valid "Replaces" value.
        /// </summary>
        /// <returns>Returns "Replaces" value.</returns>
        public override string ToStringValue()
        {
            /*
                Replaces        = callid *(SEMI replaces-param)
                replaces-param  = to-tag / from-tag / early-flag / generic-param
                to-tag          = "to-tag" EQUAL token
                from-tag        = "from-tag" EQUAL token
                early-flag      = "early-only"    
            */

            StringBuilder retVal = new StringBuilder();
            
            // delta-seconds
            retVal.Append(m_CallID);

            // Add parameters
            retVal.Append(ParametersToString());

            return retVal.ToString();
        }

        #endregion


        #region Properties Implementation

        /// <summary>
        /// Gets or sets call id.
        /// </summary>
        /// <exception cref="ArgumentNullException">Is raised when null value is passed.</exception>
        public string CallID
        {
            get{ return m_CallID; }

            set{
                if(value == null){
                    throw new ArgumentNullException("CallID");
                }

                m_CallID = value;
            }
        }

        /// <summary>
        /// Gets or sets Replaces 'to-tag' parameter. Value null means not specified.
        /// </summary>
        public string ToTag
        {
            get{ 
                SIP_Parameter parameter = this.Parameters["to-tag"];
                if(parameter != null){
                    return parameter.Value;
                }
                else{
                    return null;
                }
            }

            set{
                if(value == null){
                    this.Parameters.Remove("to-tag");
                }
                else{
                    this.Parameters.Set("to-tag",value);
                }
            }
        }

        /// <summary>
        /// Gets or sets Replaces 'from-tag' parameter. Value null means not specified.
        /// </summary>
        public string FromTag
        {
            get{ 
                SIP_Parameter parameter = this.Parameters["from-tag"];
                if(parameter != null){
                    return parameter.Value;
                }
                else{
                    return null;
                }
            }

            set{
                if(value == null){
                    this.Parameters.Remove("from-tag");
                }
                else{
                    this.Parameters.Set("from-tag",value);
                }
            }
        }

        /// <summary>
        /// Gets or sets Replaces 'early-flag' parameter.
        /// </summary>
        public bool EarlyFlag
        {                                    
            get{ 
                if(this.Parameters.Contains("early-only")){
                    return true;
                }
                else{
                    return false;
                }
            }

            set{
                if(!value){
                    this.Parameters.Remove("early-only");
                }
                else{
                    this.Parameters.Set("early-only",null);
                }
            }
        }

        #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
No Biography provided

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