dotnet-core_mail-server/MailServer/DNSClient/Records/UnknownRecord.cs

70 lines
3.5 KiB
C#

/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
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**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
class UnknownRecord : DnsRecordBase
{
public UnknownRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
// Type not implemented so we read it into a buffer and print out the data.
StringBuilder sb = new StringBuilder(this.DnsHeader.DataLength);
byte[] b = new byte[1];
// Loop over data, if char is easily converted to ASCII, convert it.
// Otherwise print a '.'
for (int i = 0; i < this.DnsHeader.DataLength; i++)
{
ms.Read(b, 0, 1);
if ((b[0] > 0x20) && (b[0] < 0x7e))
{
sb.Append(Encoding.ASCII.GetString(b));
}
else
{
sb.Append('.');
}
}
_answer = sb.ToString();
_errorMsg = "Type " + this.DnsHeader.NsType + " not implemented.";
}
}
}