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-rw-r--r--src/main/java/de/pixart/messenger/utils/Resolver.java50
1 files changed, 43 insertions, 7 deletions
diff --git a/src/main/java/de/pixart/messenger/utils/Resolver.java b/src/main/java/de/pixart/messenger/utils/Resolver.java
index 03ad00145..528b4882c 100644
--- a/src/main/java/de/pixart/messenger/utils/Resolver.java
+++ b/src/main/java/de/pixart/messenger/utils/Resolver.java
@@ -19,6 +19,7 @@ import de.measite.minidns.hla.ResolverApi;
import de.measite.minidns.hla.ResolverResult;
import de.measite.minidns.record.A;
import de.measite.minidns.record.AAAA;
+import de.measite.minidns.record.CNAME;
import de.measite.minidns.record.Data;
import de.measite.minidns.record.InternetAddressRR;
import de.measite.minidns.record.SRV;
@@ -46,7 +47,7 @@ public class Resolver {
Log.d(Config.LOGTAG, Resolver.class.getSimpleName() + ": " + e.getMessage());
}
if (results.size() == 0) {
- results.add(Result.createDefault(domain));
+ results.addAll(resolveFallback(DNSName.from(domain)));
}
Collections.sort(results);
Log.d(Config.LOGTAG, Resolver.class.getSimpleName() + ": " + results.toString());
@@ -54,7 +55,7 @@ public class Resolver {
}
private static List<Result> resolveSrv(String domain, final boolean directTls) throws IOException {
- if (Thread.interrupted()) {
+ if (Thread.currentThread().isInterrupted()) {
return Collections.emptyList();
}
DNSName dnsName = DNSName.from((directTls ? DIRECT_TLS_SERVICE : STARTTLS_SERICE) + "._tcp." + domain);
@@ -63,7 +64,7 @@ public class Resolver {
for (SRV record : result.getAnswersOrEmptySet()) {
final boolean addedIPv4 = results.addAll(resolveIp(record, A.class, result.isAuthenticData(), directTls));
results.addAll(resolveIp(record, AAAA.class, result.isAuthenticData(), directTls));
- if (!addedIPv4 && !Thread.interrupted()) {
+ if (!addedIPv4 && !Thread.currentThread().isInterrupted()) {
Result resolverResult = Result.fromRecord(record, directTls);
resolverResult.authenticated = resolverResult.isAuthenticated();
results.add(resolverResult);
@@ -73,12 +74,12 @@ public class Resolver {
}
private static <D extends InternetAddressRR> List<Result> resolveIp(SRV srv, Class<D> type, boolean authenticated, boolean directTls) {
- if (Thread.interrupted()) {
+ if (Thread.currentThread().isInterrupted()) {
return Collections.emptyList();
}
List<Result> list = new ArrayList<>();
try {
- ResolverResult<D> results = resolveWithFallback(srv.name, type);
+ ResolverResult<D> results = resolveWithFallback(srv.name, type, !authenticated);
for (D record : results.getAnswersOrEmptySet()) {
Result resolverResult = Result.fromRecord(srv, directTls);
resolverResult.authenticated = results.isAuthenticData() && authenticated;
@@ -91,7 +92,37 @@ public class Resolver {
return list;
}
+ private static List<Result> resolveFallback(DNSName dnsName) {
+ List<Result> results = new ArrayList<>();
+ try {
+ for (A a : resolveWithFallback(dnsName, A.class, true).getAnswersOrEmptySet()) {
+ results.add(Result.createDefault(dnsName, a.getInetAddress()));
+ }
+ for (AAAA aaaa : resolveWithFallback(dnsName, AAAA.class, true).getAnswersOrEmptySet()) {
+ results.add(Result.createDefault(dnsName, aaaa.getInetAddress()));
+ }
+ if (results.size() == 0) {
+ for (CNAME cname : resolveWithFallback(dnsName, CNAME.class, true).getAnswersOrEmptySet()) {
+ results.addAll(resolveFallback(cname.name));
+ }
+ }
+ } catch (IOException e) {
+ Log.d(Config.LOGTAG, "error resolving fallback records " + e);
+ }
+ if (results.size() == 0) {
+ results.add(Result.createDefault(dnsName));
+ }
+ return results;
+ }
+
private static <D extends Data> ResolverResult<D> resolveWithFallback(DNSName dnsName, Class<D> type) throws IOException {
+ return resolveWithFallback(dnsName, type, false);
+ }
+
+ private static <D extends Data> ResolverResult<D> resolveWithFallback(DNSName dnsName, Class<D> type, boolean skipDnssec) throws IOException {
+ if (skipDnssec) {
+ return ResolverApi.INSTANCE.resolve(dnsName, type);
+ }
try {
final ResolverResult<D> r = DnssecResolverApi.INSTANCE.resolveDnssecReliable(dnsName, type);
if (r.wasSuccessful()) {
@@ -183,11 +214,16 @@ public class Resolver {
return result;
}
- public static Result createDefault(String domain) {
+ public static Result createDefault(DNSName hostname, InetAddress ip) {
Result result = new Result();
result.port = 5222;
- result.hostname = DNSName.from(domain);
+ result.hostname = hostname;
+ result.ip = ip;
return result;
}
+
+ public static Result createDefault(DNSName hostname) {
+ return createDefault(hostname, null);
+ }
}
} \ No newline at end of file