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;
+    }
+}