mirror of https://github.com/apache/cloudstack.git
74 lines
2.6 KiB
Java
74 lines
2.6 KiB
Java
/* VirtualDNS - A modular DNS server.
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* Copyright (C) 2000 Eric Kidd
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* Copyright (C) 1999 Brian Wellington
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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import java.io.*;
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import org.xbill.DNS.*;
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import org.xbill.DNS.utils.*;
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/*************************************************************************
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* Routines for creating different kinds of DNS error responses.
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*************************************************************************
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* This code was adapted from Brian Wellington's jnamed code.
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* @see org.xbill.DNS.Message
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*/
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public class ErrorMessages {
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/*********************************************************************
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* Create a format error message (FORMERR).
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*********************************************************************
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* @param in The malformed packet.
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* @return A DNS error message.
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*/
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public static Message makeFormatErrorMessage(byte [] in) {
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Header header;
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try {
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header = new Header(in);
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}
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catch (IOException e) {
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header = new Header(0);
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}
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Message response = new Message();
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response.setHeader(header);
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for (int i = 0; i < 4; i++)
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response.removeAllRecords(i);
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header.setRcode(Rcode.FORMERR);
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return response;
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}
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/*********************************************************************
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* Create an arbitrary DNS error message.
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*********************************************************************
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* @param query The query sent by the user.
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* @param rcode The response code to use for this error.
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* @return A DNS error message.
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* @see org.xbill.DNS.Rcode
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*/
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public static Message makeErrorMessage(SOARecord soa, Message response, short rcode) {
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Header header = response.getHeader();
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// Message response = new Message();
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// response.setHeader(header);
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for (int i = 1; i < 4; i++)
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response.removeAllRecords(i);
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response.addRecord(soa, Section.AUTHORITY);
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header.setRcode(rcode);
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return response;
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}
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}
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