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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.Dns.Client
{
    /// <summary>
    /// NAPRT(Naming Authority Pointer) resource record. Defined in RFC 3403.
    /// </summary>
    [Serializable]
    public class DNS_rr_NAPTR : DNS_rr_base
    {
        private int    m_Order       = 0;
        private int    m_Preference  = 0;
        private string m_Flags       = "";
        private string m_Services    = "";
        private string m_Regexp      = "";
        private string m_Replacement = "";

        /// <summary>
        /// Default constructor.
        /// </summary>
        /// <param name="order">Oorder in which the NAPTR records MUST be processed.</param>
        /// <param name="preference">Order in which NAPTR records with equal Order values SHOULD be processed.</param>
        /// <param name="flags">Flags which control the rewriting and interpretation of the fields in the record.</param>
        /// <param name="services">Services related to this record.</param>
        /// <param name="regexp">Regular expression that is applied to the original string.</param>
        /// <param name="replacement">Regular expressions replacement value.</param>
        /// <param name="ttl">Time to live value in seconds.</param>
        public DNS_rr_NAPTR(int order,int preference,string flags,string services,string regexp,string replacement,int ttl) : base(QTYPE.NAPTR,ttl)
        {
            m_Order       = order;
            m_Preference  = preference;
            m_Flags       = flags;
            m_Services    = services;
            m_Regexp      = regexp;
            m_Replacement = replacement;
        }


        #region static method Parse

        /// <summary>
        /// Parses resource record from reply data.
        /// </summary>
        /// <param name="reply">DNS server reply data.</param>
        /// <param name="offset">Current offset in reply data.</param>
        /// <param name="rdLength">Resource record data length.</param>
        /// <param name="ttl">Time to live in seconds.</param>
        public static DNS_rr_NAPTR Parse(byte[] reply,ref int offset,int rdLength,int ttl)
        {
            /* RFC 3403.
                The packet format for the NAPTR record is as follows
                                               1  1  1  1  1  1
                 0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5
                +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
                |                     ORDER                     |
                +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
                |                   PREFERENCE                  |
                +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
                /                     FLAGS                     /
                +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
                /                   SERVICES                    /
                +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
                /                    REGEXP                     /
                +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
                /                  REPLACEMENT                  /
                /                                               /
                +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
            */

            int order = reply[offset++] << 8 | reply[offset++];

            int preference = reply[offset++] << 8 | reply[offset++];

            string flags = Dns_Client.ReadCharacterString(reply,ref offset);

            string services = Dns_Client.ReadCharacterString(reply,ref offset);

            string regexp = Dns_Client.ReadCharacterString(reply,ref offset);
            
            string replacement = "";
            Dns_Client.GetQName(reply,ref offset,ref replacement);

            return new DNS_rr_NAPTR(order,preference,flags,services,regexp,replacement,ttl);
        }

        #endregion


        #region Properties Implementation

        /// <summary>
        /// Gets order in which the NAPTR records MUST be processed in order to accurately 
        /// represent the ordered list of Rules.
        /// </summary>
        public int Order
        {
            get{ return m_Order; }
        }

        /// <summary>
        /// Gets the order in which NAPTR records with equal Order values SHOULD be processed, 
        /// low numbers being processed before high numbers.
        /// </summary>
        public int Preference
        {
            get{ return m_Preference; }
        }

        /// <summary>
        /// Gets flags which control the rewriting and interpretation of the fields in the record.
        /// </summary>
        public string Flags
        {
            get{ return m_Flags; }
        }

        /// <summary>
        /// Gets services related to this record. Known values can be get from: http://www.iana.org/assignments/enum-services.
        /// </summary>
        public string Services
        {
            get{ return m_Services; }
        }

        /// <summary>
        /// Gets regular expression that is applied to the original string held by the client in order to 
        /// construct the next domain name to lookup.
        /// </summary>
        public string Regexp
        {
            get{ return m_Regexp; }
        }

        /// <summary>
        /// Gets regular expressions replacement value.
        /// </summary>
        public string Replacement
        {
            get{ return m_Replacement; }
        }

        #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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