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dig.java
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152 lines (123 loc) · 2.94 KB
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// Copyright (c) 1999 Brian Wellington (bwelling@xbill.org)
// Portions Copyright (c) 1999 Network Associates, Inc.
import java.io.*;
import java.util.*;
import DNS.*;
public class dig {
static Name name = null;
static short type = dns.A, _class = dns.IN;
static void
usage() {
System.out.println("Usage: dig [@server] name [<type>] [<class>]");
System.exit(0);
}
static void
doQuery(Message query, Resolver res) throws IOException {
Message response;
System.out.println("; java dig 0.0");
response = res.send(query);
if (response == null)
return;
System.out.println(response);
}
static void
doAXFR(Message query, Resolver res) throws IOException {
Message response;
System.out.println("; java dig 0.0 <> " + name + " axfr");
response = res.sendAXFR(query);
if (response == null)
return;
Enumeration e = response.getSection(dns.ANSWER);
while (e.hasMoreElements())
System.out.println(e.nextElement());
System.out.print(";; done (");
System.out.print(response.getHeader().getCount(dns.ANSWER));
System.out.print(" records, ");
System.out.print(response.getHeader().getCount(dns.ADDITIONAL));
System.out.println(" additional)");
}
public static void
main(String argv[]) throws IOException {
String server;
int arg;
Message query = new Message();
Record rec;
Resolver res = null;
query.getHeader().setFlag(dns.RD);
query.getHeader().setOpcode(dns.QUERY);
if (argv.length < 1) {
usage();
}
try {
arg = 0;
if (argv[arg].startsWith("@")) {
server = argv[arg++].substring(1);
res = new Resolver(server);
}
else
res = new Resolver();
name = new Name(argv[arg++]);
type = dns.typeValue(argv[arg]);
if (type < 0)
type = dns.A;
else
arg++;
_class = dns.classValue(argv[arg]);
if (_class < 0)
_class = dns.IN;
else
arg++;
while (argv[arg].startsWith("-") && argv[arg].length() > 1) {
switch (argv[arg].charAt(1)) {
case 'p':
String portStr;
int port;
if (argv[arg].length() > 2)
portStr = argv[arg].substring(2);
else
portStr = argv[++arg];
port = Integer.parseInt(portStr);
if (port < 0 || port > 65536) {
System.out.println("Invalid port");
return;
}
res.setPort(port);
break;
case 'k':
String key;
if (argv[arg].length() > 2)
key = argv[arg].substring(2);
else
key = argv[++arg];
int index = key.indexOf('/');
if (index < 0)
res.setTSIGKey(key);
else
res.setTSIGKey(key.substring(0, index),
key.substring(index+1));
break;
case 't':
res.setTCP(true);
break;
case 'e':
res.setEDNS(true);
break;
default:
System.out.print("Invalid option");
System.out.println(argv[arg]);
}
arg++;
}
}
catch (ArrayIndexOutOfBoundsException e) {
if (name == null)
usage();
}
rec = Record.newRecord(name, type, _class);
query.addRecord(dns.QUESTION, rec);
if (type == dns.AXFR)
doAXFR(query, res);
else
doQuery(query, res);
}
}