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// Copyright (c) 1999-2004 Brian Wellington (bwelling@xbill.org)
package org.xbill.DNS;
import java.io.*;
/**
* Server Selection Record - finds hosts running services in a domain. An
* SRV record will normally be named _<service>._<protocol>.domain
* - examples would be _sips._tcp.example.org (for the secure SIP protocol) and
* _http._tcp.example.com (if HTTP used SRV records)
*
* @author Brian Wellington
*/
public class SRVRecord extends Record {
private static final long serialVersionUID = -3886460132387522052L;
private int priority, weight, port;
private Name target;
SRVRecord() {}
Record
getObject() {
return new SRVRecord();
}
/**
* Creates an SRV Record from the given data
* @param priority The priority of this SRV. Records with lower priority
* are preferred.
* @param weight The weight, used to select between records at the same
* priority.
* @param port The TCP/UDP port that the service uses
* @param target The host running the service
*/
public
SRVRecord(Name name, int dclass, long ttl, int priority,
int weight, int port, Name target)
{
super(name, Type.SRV, dclass, ttl);
this.priority = checkU16("priority", priority);
this.weight = checkU16("weight", weight);
this.port = checkU16("port", port);
this.target = checkName("target", target);
}
void
rrFromWire(DNSInput in) throws IOException {
priority = in.readU16();
weight = in.readU16();
port = in.readU16();
target = new Name(in);
}
void
rdataFromString(Tokenizer st, Name origin) throws IOException {
priority = st.getUInt16();
weight = st.getUInt16();
port = st.getUInt16();
target = st.getName(origin);
}
/** Converts rdata to a String */
String
rrToString() {
StringBuffer sb = new StringBuffer();
sb.append(priority + " ");
sb.append(weight + " ");
sb.append(port + " ");
sb.append(target);
return sb.toString();
}
/** Returns the priority */
public int
getPriority() {
return priority;
}
/** Returns the weight */
public int
getWeight() {
return weight;
}
/** Returns the port that the service runs on */
public int
getPort() {
return port;
}
/** Returns the host running that the service */
public Name
getTarget() {
return target;
}
void
rrToWire(DNSOutput out, Compression c, boolean canonical) {
out.writeU16(priority);
out.writeU16(weight);
out.writeU16(port);
target.toWire(out, null, canonical);
}
public Name
getAdditionalName() {
return target;
}
}
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