using System;
using LumiSoft.Net.DNS.Client;
namespace LumiSoft.Net.DNS
{
/// <summary>
/// SOA record class.
/// </summary>
[Serializable]
public class DNS_rr_SOA : DNS_rr
{
private string m_NameServer = "";
private string m_AdminEmail = "";
private long m_Serial = 0;
private long m_Refresh = 0;
private long m_Retry = 0;
private long m_Expire = 0;
private long m_Minimum = 0;
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="name">DNS domain name that owns a resource record.</param>
/// <param name="nameServer">Name server.</param>
/// <param name="adminEmail">Zone administrator email.</param>
/// <param name="serial">Version number of the original copy of the zone.</param>
/// <param name="refresh">Time interval(in seconds) before the zone should be refreshed.</param>
/// <param name="retry">Time interval(in seconds) that should elapse before a failed refresh should be retried.</param>
/// <param name="expire">Time value(in seconds) that specifies the upper limit on the time interval that can elapse before the zone is no longer authoritative.</param>
/// <param name="minimum">Minimum TTL(in seconds) field that should be exported with any RR from this zone.</param>
/// <param name="ttl">TTL value.</param>
public DNS_rr_SOA(string name,string nameServer,string adminEmail,long serial,long refresh,long retry,long expire,long minimum,int ttl) : base(name,DNS_QType.SOA,ttl)
{
m_NameServer = nameServer;
m_AdminEmail = adminEmail;
m_Serial = serial;
m_Refresh = refresh;
m_Retry = retry;
m_Expire = expire;
m_Minimum = minimum;
}
#region static method Parse
/// <summary>
/// Parses resource record from reply data.
/// </summary>
/// <param name="name">DNS domain name that owns a resource record.</param>
/// <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_SOA Parse(string name,byte[] reply,ref int offset,int rdLength,int ttl)
{
/* RFC 1035 3.3.13. SOA RDATA format
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/ MNAME /
/ /
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/ RNAME /
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| SERIAL |
| |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| REFRESH |
| |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| RETRY |
| |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| EXPIRE |
| |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| MINIMUM |
| |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
where:
MNAME The <domain-name> of the name server that was the
original or primary source of data for this zone.
RNAME A <domain-name> which specifies the mailbox of the
person responsible for this zone.
SERIAL The unsigned 32 bit version number of the original copy
of the zone. Zone transfers preserve this value. This
value wraps and should be compared using sequence space
arithmetic.
REFRESH A 32 bit time interval before the zone should be
refreshed.
RETRY A 32 bit time interval that should elapse before a
failed refresh should be retried.
EXPIRE A 32 bit time value that specifies the upper limit on
the time interval that can elapse before the zone is no
longer authoritative.
MINIMUM The unsigned 32 bit minimum TTL field that should be
exported with any RR from this zone.
*/
//---- Parse record -------------------------------------------------------------//
// MNAME
string nameserver = "";
Dns_Client.GetQName(reply,ref offset,ref nameserver);
// RNAME
string adminMailBox = "";
Dns_Client.GetQName(reply,ref offset,ref adminMailBox);
char[] adminMailBoxAr = adminMailBox.ToCharArray();
for(int i=0;i<adminMailBoxAr.Length;i++){
if(adminMailBoxAr[i] == '.'){
adminMailBoxAr[i] = '@';
break;
}
}
adminMailBox = new string(adminMailBoxAr);
// SERIAL
long serial = reply[offset++] << 24 | reply[offset++] << 16 | reply[offset++] << 8 | reply[offset++];
// REFRESH
long refresh = reply[offset++] << 24 | reply[offset++] << 16 | reply[offset++] << 8 | reply[offset++];
// RETRY
long retry = reply[offset++] << 24 | reply[offset++] << 16 | reply[offset++] << 8 | reply[offset++];
// EXPIRE
long expire = reply[offset++] << 24 | reply[offset++] << 16 | reply[offset++] << 8 | reply[offset++];
// MINIMUM
long minimum = reply[offset++] << 24 | reply[offset++] << 16 | reply[offset++] << 8 | reply[offset++];
//--------------------------------------------------------------------------------//
return new DNS_rr_SOA(name,nameserver,adminMailBox,serial,refresh,retry,expire,minimum,ttl);
}
#endregion
#region Properties Implementation
/// <summary>
/// Gets name server.
/// </summary>
public string NameServer
{
get{ return m_NameServer; }
}
/// <summary>
/// Gets zone administrator email.
/// </summary>
public string AdminEmail
{
get{ return m_AdminEmail; }
}
/// <summary>
/// Gets version number of the original copy of the zone.
/// </summary>
public long Serial
{
get{ return m_Serial; }
}
/// <summary>
/// Gets time interval(in seconds) before the zone should be refreshed.
/// </summary>
public long Refresh
{
get{ return m_Refresh; }
}
/// <summary>
/// Gets time interval(in seconds) that should elapse before a failed refresh should be retried.
/// </summary>
public long Retry
{
get{ return m_Retry; }
}
/// <summary>
/// Gets time value(in seconds) that specifies the upper limit on the time interval that can elapse before the zone is no longer authoritative.
/// </summary>
public long Expire
{
get{ return m_Expire; }
}
/// <summary>
/// Gets minimum TTL(in seconds) field that should be exported with any RR from this zone.
/// </summary>
public long Minimum
{
get{ return m_Minimum; }
}
#endregion
}
}