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-rw-r--r--src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java19
1 files changed, 12 insertions, 7 deletions
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java
index 90618292..a0fd9995 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java
@@ -135,15 +135,20 @@ public class DNSHelper {
Logging.d("dns", "using dns server: " + dnsServerHostAddress + " to look up " + qname);
try {
DNSMessage message = client.query(qname, TYPE.SRV, CLASS.IN, dnsServerHostAddress);
- Record[] rrset = message.getAnswers();
- for (Record rr : rrset) {
- Data d = rr.getPayload();
- if (d instanceof SRV && NameUtil.idnEquals(qname, rr.getName())) {
- SRV srv = (SRV) d;
- SrvRecord srvRecord = new SrvRecord(srv.getPriority(), srv.getName(), srv.getPort(), tlsSrvRecord);
- result.add(srvRecord);
+ if (null != message) {
+ Record[] rrset = message.getAnswers();
+ for (Record rr : rrset) {
+ Data d = rr.getPayload();
+ if (d instanceof SRV && NameUtil.idnEquals(qname, rr.getName())) {
+ SRV srv = (SRV) d;
+ SrvRecord srvRecord = new SrvRecord(srv.getPriority(), srv.getName(), srv.getPort(), tlsSrvRecord);
+ result.add(srvRecord);
+ }
}
+ } else {
+ Logging.e("dns", "No valid DNS message retrieved.");
}
+
} catch (IOException e) {
Logging.d("dns", "Error while retrieving SRV record '" + qname + "' for '" + host + "' from DNS '" + dnsServerHostAddress + "': " + e.getMessage());
}