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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.SDP
{
    /// <summary>
    /// A SDP_ConnectionData represents an <B>c=</B> SDP message field. Defined in RFC 4566 5.7. Connection Data.
    /// </summary>
    public class SDP_ConnectionData
    {
        private string m_NetType     = "IN";
        private string m_AddressType = "";
        private string m_Address     = "";

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


        #region method static Parse

        /// <summary>
        /// Parses media from "c" SDP message field.
        /// </summary>
        /// <param name="cValue">"m" SDP message field.</param>
        /// <returns></returns>
        public static SDP_ConnectionData Parse(string cValue)
        {
            // c=<nettype> <addrtype> <connection-address>

            SDP_ConnectionData connectionInfo = new SDP_ConnectionData();

            // Remove c=
            StringReader r = new StringReader(cValue);
            r.QuotedReadToDelimiter('=');

            //--- <nettype> ------------------------------------------------------------
            string word = r.ReadWord();
            if(word == null){
                throw new Exception("SDP message \"c\" field <nettype> value is missing !");
            }
            connectionInfo.m_NetType = word;

            //--- <addrtype> -----------------------------------------------------------
            word = r.ReadWord();
            if(word == null){
                throw new Exception("SDP message \"c\" field <addrtype> value is missing !");
            }
            connectionInfo.m_AddressType = word;

            //--- <connection-address> -------------------------------------------------
            word = r.ReadWord();
            if(word == null){
                throw new Exception("SDP message \"c\" field <connection-address> value is missing !");
            }
            connectionInfo.m_Address = word;

            return connectionInfo;
        }

        #endregion

        #region method ToValue

        /// <summary>
        /// Converts this to valid connection data stirng. 
        /// </summary>
        /// <returns></returns>
        public string ToValue()
        {
            // c=<nettype> <addrtype> <connection-address>

            return "c=" + NetType + " " + AddressType + " " + Address + "\r\n";
        }

        #endregion


        #region Properties Implementation

        /// <summary>
        /// Gets net type. Currently it's always IN(Internet).
        /// </summary>
        public string NetType
        {
            get{ return m_NetType; }
        }

        /// <summary>
        /// Gets or sets address type. Currently defined values IP4 or IP6.
        /// </summary>
        public string AddressType
        {
            get{ return m_AddressType; }

            set{
                if(string.IsNullOrEmpty(value)){
                    throw new ArgumentException("Property AddressType can't be null or empty !");
                }

                m_AddressType = value; 
            }
        }

        /// <summary>
        /// Gets or sets connection address.
        /// </summary>
        public string Address
        {
            get{ return m_Address; }

            set{ 
                if(string.IsNullOrEmpty(value)){
                    throw new ArgumentException("Property Address can't be null or empty !");
                }

                m_Address = value;
            }
        }

        #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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