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Diffstat (limited to 'src/org/jivesoftware/smack/util/dns/DNSJavaResolver.java')
-rw-r--r-- | src/org/jivesoftware/smack/util/dns/DNSJavaResolver.java | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/org/jivesoftware/smack/util/dns/DNSJavaResolver.java b/src/org/jivesoftware/smack/util/dns/DNSJavaResolver.java new file mode 100644 index 0000000..dd93fd3 --- /dev/null +++ b/src/org/jivesoftware/smack/util/dns/DNSJavaResolver.java @@ -0,0 +1,73 @@ +/** + * 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; + +import java.util.ArrayList; +import java.util.List; + +import org.xbill.DNS.Lookup; +import org.xbill.DNS.Record; +import org.xbill.DNS.Type; + +/** + * This implementation uses the <a href="http://www.dnsjava.org/">dnsjava</a> implementation for resolving DNS addresses. + * + */ +public class DNSJavaResolver implements DNSResolver { + + private static DNSJavaResolver instance = new DNSJavaResolver(); + + private DNSJavaResolver() { + + } + + public static DNSResolver getInstance() { + return instance; + } + + @Override + public List<SRVRecord> lookupSRVRecords(String name) { + List<SRVRecord> res = new ArrayList<SRVRecord>(); + + try { + Lookup lookup = new Lookup(name, Type.SRV); + Record recs[] = lookup.run(); + if (recs == null) + return res; + + for (Record record : recs) { + org.xbill.DNS.SRVRecord srvRecord = (org.xbill.DNS.SRVRecord) record; + if (srvRecord != null && srvRecord.getTarget() != null) { + String host = srvRecord.getTarget().toString(); + int port = srvRecord.getPort(); + int priority = srvRecord.getPriority(); + int weight = srvRecord.getWeight(); + + SRVRecord r; + try { + r = new SRVRecord(host, port, priority, weight); + } catch (Exception e) { + continue; + } + res.add(r); + } + } + + } catch (Exception e) { + } + return res; + } +} |