-
Notifications
You must be signed in to change notification settings - Fork 0
/
ErrorMessages.java
73 lines (68 loc) · 2.56 KB
/
ErrorMessages.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
/* VirtualDNS - A modular DNS server.
* Copyright (C) 2000 Eric Kidd
* Copyright (C) 1999 Brian Wellington
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
import java.io.*;
import org.xbill.DNS.*;
import org.xbill.DNS.utils.*;
/*************************************************************************
* Routines for creating different kinds of DNS error responses.
*************************************************************************
* This code was adapted from Brian Wellington's jnamed code.
* @see org.xbill.DNS.Message
*/
public class ErrorMessages {
/*********************************************************************
* Create a format error message (FORMERR).
*********************************************************************
* @param in The malformed packet.
* @return A DNS error message.
*/
public static Message makeFormatErrorMessage(byte [] in) {
Header header;
try {
header = new Header(in);
}
catch (IOException e) {
header = new Header(0);
}
Message response = new Message();
response.setHeader(header);
for (int i = 0; i < 4; i++)
response.removeAllRecords(i);
header.setRcode(Rcode.FORMERR);
return response;
}
/*********************************************************************
* Create an arbitrary DNS error message.
*********************************************************************
* @param query The query sent by the user.
* @param rcode The response code to use for this error.
* @return A DNS error message.
* @see org.xbill.DNS.Rcode
*/
public static Message makeErrorMessage(SOARecord soa, Message response, short rcode) {
Header header = response.getHeader();
// Message response = new Message();
// response.setHeader(header);
for (int i = 1; i < 4; i++)
response.removeAllRecords(i);
response.addRecord(soa, Section.AUTHORITY);
header.setRcode(rcode);
return response;
}
}