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SIP Stack with SIP Proxy - (VOIP)

, 11 Jun 2007
C# implementation of SIP
SIP_Proxy_demo.zip
SIP_Proxy_demo
SIP_Proxy_demo.suo
SIP_Proxy_demo
bin
Debug
LumiSoft.Net.dll
SIP_Proxy_demo.exe
SIP_Proxy_demo.vshost.exe
dep
LumiSoft.Net.dll
LumiSoft.Net.pdb
Properties
Settings.settings
Resources
add.ico
app.ico
delete.ico
edit.ico
error.ico
info.ico
refresh.ico
rule.ico
server_running.ico
server_stopped.ico
viewmessages.ico
Stack.zip
Net
docs
dns
dns_records.jpg
dns_records.vsd
Net
_junk
_Obsolete
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
RTP
SDP
ServersCore
SIP
Client
Message
Proxy
Stack
SMTP
Client
Server
STUN
Client
Message
URI
using System;
using System.Collections.Generic;
using System.Text;

namespace LumiSoft.Net.SIP.Message
{
    /// <summary>
    /// Implements generic multi value SIP header field.
    /// This is used by header fields like Via,Contact, ... .
    /// </summary>
    public class SIP_MultiValueHF<T> : SIP_HeaderField where T : SIP_t_Value,new()
    {
        private List<T> m_pValues = null;

        /// <summary>
        /// Default constructor.
        /// </summary>
        /// <param name="name">Header field name.</param>
        /// <param name="value">Header field value.</param>
        public SIP_MultiValueHF(string name,string value) : base(name,value)
        {
            m_pValues = new List<T>();

            SetMultiValue(true);

            Parse(value);
        }


        #region method Parse

        /// <summary>
        /// Parses multi value header field values.
        /// </summary>
        /// <param name="value">Header field value.</param>
        private void Parse(string value)
        {
            m_pValues.Clear();
            
            StringReader r = new StringReader(value);
            while(r.Available > 0){
                r.ReadToFirstChar();
                // If we have COMMA, just consume it, it last value end.
                if(r.StartsWith(",")){
                    r.ReadSpecifiedLength(1);
                }

                // Allow xxx-param to pasre 1 value from reader.
                T param = new T();
                param.Parse(r);
                m_pValues.Add(param);                
            }
        }

        #endregion

        #region method ToStringValue

        /// <summary>
        /// Converts to valid mutli value header field value.
        /// </summary>
        /// <returns></returns>
        private string ToStringValue()
        {
            StringBuilder retVal = new StringBuilder();
            // Syntax: xxx-parm *(COMMA xxx-parm)
            for(int i=0;i<m_pValues.Count;i++){
                retVal.Append(m_pValues[i].ToStringValue());

                // Don't add comma for last item.
                if(i < m_pValues.Count - 1){
                    retVal.Append(',');
                }
            }

            return retVal.ToString();
        }

        #endregion


        #region method GetValues

        /// <summary>
        /// Gets header field values.
        /// </summary>
        /// <returns></returns>
        public object[] GetValues()
        {
            return m_pValues.ToArray();
        }

        #endregion

        #region method Remove

        /// <summary>
        /// Removes value from specified index.
        /// </summary>
        /// <param name="index">Index of value to remove.</param>
        public void Remove(int index)
        {
            if(index > -1 && index < m_pValues.Count){
                m_pValues.RemoveAt(index);
            }
        }

        #endregion


        #region Properties Implementation

        /// <summary>
        /// Gets or sets header field value.
        /// </summary>
        public override string Value
        {
            get{ return this.ToStringValue(); }

            set{
                if(value != null){
                    throw new ArgumentNullException("Property Value value may not be null !");
                }

                Parse(value);

                base.Value = value;
            }
        }

        /// <summary>
        /// Gets header field values.
        /// </summary>
        public List<T> Values
        {
            get{ return m_pValues; }
        }

        /// <summary>
        /// Gets values count.
        /// </summary>
        public int Count
        {
            get{ return m_pValues.Count; }
        }
                
        #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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Web04 | 2.8.140827.1 | Last Updated 11 Jun 2007
Article Copyright 2007 by Ivar Lumi
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