diff options
Diffstat (limited to 'src/org/jivesoftware/smack/util/dns/SRVRecord.java')
-rw-r--r-- | src/org/jivesoftware/smack/util/dns/SRVRecord.java | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/src/org/jivesoftware/smack/util/dns/SRVRecord.java b/src/org/jivesoftware/smack/util/dns/SRVRecord.java new file mode 100644 index 0000000..457e40e --- /dev/null +++ b/src/org/jivesoftware/smack/util/dns/SRVRecord.java @@ -0,0 +1,79 @@ +/** + * Copyright 2013 Florian Schmaus + * + * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.jivesoftware.smack.util.dns; + +/** + * @see <a href="http://tools.ietf.org/html/rfc2782>RFC 2782: A DNS RR for specifying the location of services (DNS + * SRV)<a> + * @author Florian Schmaus + * + */ +public class SRVRecord extends HostAddress implements Comparable<SRVRecord> { + + private int weight; + private int priority; + + /** + * Create a new SRVRecord + * + * @param fqdn Fully qualified domain name + * @param port The connection port + * @param priority Priority of the target host + * @param weight Relative weight for records with same priority + * @throws IllegalArgumentException fqdn is null or any other field is not in valid range (0-65535). + */ + public SRVRecord(String fqdn, int port, int priority, int weight) { + super(fqdn, port); + if (weight < 0 || weight > 65535) + throw new IllegalArgumentException( + "DNS SRV records weight must be a 16-bit unsiged integer (i.e. between 0-65535. Weight was: " + + weight); + + if (priority < 0 || priority > 65535) + throw new IllegalArgumentException( + "DNS SRV records priority must be a 16-bit unsiged integer (i.e. between 0-65535. Priority was: " + + priority); + + this.priority = priority; + this.weight = weight; + + } + + public int getPriority() { + return priority; + } + + public int getWeight() { + return weight; + } + + @Override + public int compareTo(SRVRecord other) { + // According to RFC2782, + // "[a] client MUST attempt to contact the target host with the lowest-numbered priority it can reach". + // This means that a SRV record with a higher priority is 'less' then one with a lower. + int res = other.priority - this.priority; + if (res == 0) { + res = this.weight - other.weight; + } + return res; + } + + @Override + public String toString() { + return super.toString() + " prio:" + priority + ":w:" + weight; + } +} |