Networkstack: easy happy eyeball
This commit is contained in:
parent
ba6266b829
commit
b92d02ede2
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@ -7,11 +7,17 @@ import android.util.Log;
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import java.io.IOException;
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import java.lang.reflect.Field;
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import java.net.Inet4Address;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.Socket;
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import java.net.UnknownHostException;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.concurrent.Callable;
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import java.util.concurrent.ExecutionException;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.TimeUnit;
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import java.util.List;
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import de.measite.minidns.AbstractDNSClient;
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@ -33,6 +39,7 @@ import de.measite.minidns.record.InternetAddressRR;
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import de.measite.minidns.record.SRV;
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import eu.siacs.conversations.Config;
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import eu.siacs.conversations.R;
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import eu.siacs.conversations.persistance.FileBackend;
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import eu.siacs.conversations.services.XmppConnectionService;
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public class Resolver {
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@ -40,7 +47,7 @@ public class Resolver {
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public static final int DEFAULT_PORT_XMPP = 5222;
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private static final String DIRECT_TLS_SERVICE = "_xmpps-client";
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private static final String STARTTLS_SERICE = "_xmpp-client";
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private static final String STARTTLS_SERVICE = "_xmpp-client";
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private static XmppConnectionService SERVICE = null;
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@ -61,7 +68,9 @@ public class Resolver {
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final Field dnsClientField = ReliableDNSClient.class.getDeclaredField("dnsClient");
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dnsClientField.setAccessible(true);
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final DNSClient dnsClient = (DNSClient) dnsClientField.get(reliableDNSClient);
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dnsClient.getDataSource().setTimeout(3000);
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if (dnsClient != null) {
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dnsClient.getDataSource().setTimeout(3000);
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}
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final Field useHardcodedDnsServers = DNSClient.class.getDeclaredField("useHardcodedDnsServers");
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useHardcodedDnsServers.setAccessible(true);
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useHardcodedDnsServers.setBoolean(dnsClient, false);
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@ -72,13 +81,13 @@ public class Resolver {
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}
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}
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public static List<Result> fromHardCoded(String hostname, int port) {
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Result result = new Result();
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result.hostname = DNSName.from(hostname);
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result.port = port;
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result.directTls = useDirectTls(port);
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result.authenticated = true;
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return Collections.singletonList(result);
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public static Result fromHardCoded(String hostname, int port) {
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final Result ipResult = fromIpAddress(hostname, port);
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if (ipResult != null) {
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ipResult.connect();
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return ipResult;
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}
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return happyEyeball(resolveNoSrvRecords(DNSName.from(hostname), port, true));
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}
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@ -86,10 +95,11 @@ public class Resolver {
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return port == 443 || port == 5223;
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}
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public static List<Result> resolve(String domain) {
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final List<Result> ipResults = fromIpAddress(domain);
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if (ipResults.size() > 0) {
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return ipResults;
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public static Result resolve(String domain) {
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final Result ipResult = fromIpAddress(domain, DEFAULT_PORT_XMPP);
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if (ipResult != null) {
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ipResult.connect();
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return ipResult;
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}
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final List<Result> results = new ArrayList<>();
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final List<Result> fallbackResults = new ArrayList<>();
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@ -115,7 +125,7 @@ public class Resolver {
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}
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});
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threads[2] = new Thread(() -> {
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List<Result> list = resolveNoSrvRecords(DNSName.from(domain), true);
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List<Result> list = resolveNoSrvRecords(DNSName.from(domain), DEFAULT_PORT_XMPP, true);
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synchronized (fallbackResults) {
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fallbackResults.addAll(list);
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}
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@ -130,66 +140,77 @@ public class Resolver {
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threads[2].interrupt();
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synchronized (results) {
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Collections.sort(results);
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Log.d(Config.LOGTAG, Resolver.class.getSimpleName() + ": " + results.toString());
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return new ArrayList<>(results);
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return happyEyeball(results);
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}
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} else {
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threads[2].join();
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synchronized (fallbackResults) {
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Collections.sort(fallbackResults);
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Log.d(Config.LOGTAG, Resolver.class.getSimpleName() + ": " + fallbackResults.toString());
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return new ArrayList<>(fallbackResults);
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return happyEyeball(fallbackResults);
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}
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}
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} catch (InterruptedException e) {
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for (Thread thread : threads) {
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thread.interrupt();
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}
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return Collections.emptyList();
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return null;
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}
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}
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private static List<Result> fromIpAddress(String domain) {
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private static Result fromIpAddress(String domain, int port) {
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if (!IP.matches(domain)) {
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return Collections.emptyList();
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return null;
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}
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try {
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Result result = new Result();
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result.ip = InetAddress.getByName(domain);
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result.port = DEFAULT_PORT_XMPP;
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return Collections.singletonList(result);
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result.port = port;
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return result;
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} catch (UnknownHostException e) {
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return Collections.emptyList();
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return null;
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}
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}
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private static List<Result> resolveSrv(String domain, final boolean directTls) throws IOException {
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DNSName dnsName = DNSName.from((directTls ? DIRECT_TLS_SERVICE : STARTTLS_SERICE) + "._tcp." + domain);
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DNSName dnsName = DNSName.from((directTls ? DIRECT_TLS_SERVICE : STARTTLS_SERVICE) + "._tcp." + domain);
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ResolverResult<SRV> result = resolveWithFallback(dnsName, SRV.class);
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final List<Result> results = new ArrayList<>();
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final List<Thread> threads = new ArrayList<>();
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final List<Result> fallbackResults = new ArrayList<>();
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final List<Thread> fallbackThreads = new ArrayList<>();
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for (SRV record : result.getAnswersOrEmptySet()) {
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if (record.name.length() == 0 && record.priority == 0) {
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if (record.name.length() == 0) {
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continue;
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}
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threads.add(new Thread(() -> {
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final List<Result> ipv4s = resolveIp(record, A.class, result.isAuthenticData(), directTls);
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if (ipv4s.size() == 0) {
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Result resolverResult = Result.fromRecord(record, directTls);
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resolverResult.authenticated = resolverResult.isAuthenticated();
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ipv4s.add(resolverResult);
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}
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synchronized (results) {
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results.addAll(ipv4s);
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}
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}));
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threads.add(new Thread(() -> {
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final List<Result> ipv6s = resolveIp(record, AAAA.class, result.isAuthenticData(), directTls);
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synchronized (results) {
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results.addAll(ipv6s);
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}
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}));
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threads.add(new Thread(() -> {
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final List<Result> ipv4s = resolveIp(record, A.class, result.isAuthenticData(), directTls);
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synchronized (results) {
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results.addAll(ipv4s);
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}
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}));
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fallbackThreads.add(new Thread(() -> {
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try {
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for (CNAME cname : resolveWithFallback(record.name, CNAME.class, result.isAuthenticData()).getAnswersOrEmptySet()) {
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final List<Result> ipv6s = resolveIp(record, cname.name, AAAA.class, result.isAuthenticData(), directTls);
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synchronized (fallbackResults) {
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fallbackResults.addAll(ipv6s);
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}
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final List<Result> ipv4s = resolveIp(record, cname.name, A.class, result.isAuthenticData(), directTls);
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synchronized (results) {
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fallbackResults.addAll(ipv4s);
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}
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}
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} catch (Throwable throwable) {
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Log.d(Config.LOGTAG, Resolver.class.getSimpleName() + "error resolving srv cname-fallback records", throwable);
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}
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}));
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}
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for (Thread thread : threads) {
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thread.start();
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@ -201,13 +222,30 @@ public class Resolver {
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return Collections.emptyList();
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}
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}
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return results;
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if (results.size() > 0) {
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return results;
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}
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for (Thread thread : fallbackThreads) {
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thread.start();
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}
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for (Thread thread : fallbackThreads) {
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try {
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thread.join();
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} catch (InterruptedException e) {
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return Collections.emptyList();
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}
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}
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return fallbackResults;
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}
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private static <D extends InternetAddressRR> List<Result> resolveIp(SRV srv, Class<D> type, boolean authenticated, boolean directTls) {
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return resolveIp(srv, srv.name, type, authenticated, directTls);
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}
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private static <D extends InternetAddressRR> List<Result> resolveIp(SRV srv, DNSName hostname, Class<D> type, boolean authenticated, boolean directTls) {
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List<Result> list = new ArrayList<>();
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try {
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ResolverResult<D> results = resolveWithFallback(srv.name, type, authenticated);
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ResolverResult<D> results = resolveWithFallback(hostname, type, authenticated);
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for (D record : results.getAnswersOrEmptySet()) {
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Result resolverResult = Result.fromRecord(srv, directTls);
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resolverResult.authenticated = results.isAuthenticData() && authenticated;
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@ -220,24 +258,23 @@ public class Resolver {
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return list;
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}
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private static List<Result> resolveNoSrvRecords(DNSName dnsName, boolean withCnames) {
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private static List<Result> resolveNoSrvRecords(DNSName dnsName, int port, boolean withCnames) {
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List<Result> results = new ArrayList<>();
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try {
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for (A a : resolveWithFallback(dnsName, A.class, false).getAnswersOrEmptySet()) {
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results.add(Result.createDefault(dnsName, a.getInetAddress()));
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}
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for (AAAA aaaa : resolveWithFallback(dnsName, AAAA.class, false).getAnswersOrEmptySet()) {
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results.add(Result.createDefault(dnsName, aaaa.getInetAddress()));
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results.add(Result.createDefault(dnsName, aaaa.getInetAddress(), port));
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}
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for (A a : resolveWithFallback(dnsName, A.class, false).getAnswersOrEmptySet()) {
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results.add(Result.createDefault(dnsName, a.getInetAddress(), port));
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}
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if (results.size() == 0 && withCnames) {
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for (CNAME cname : resolveWithFallback(dnsName, CNAME.class, false).getAnswersOrEmptySet()) {
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results.addAll(resolveNoSrvRecords(cname.name, false));
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results.addAll(resolveNoSrvRecords(cname.name, port, false));
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}
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}
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} catch (Throwable throwable) {
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Log.d(Config.LOGTAG, Resolver.class.getSimpleName() + "error resolving fallback records", throwable);
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}
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results.add(Result.createDefault(dnsName));
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return results;
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}
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@ -262,24 +299,73 @@ public class Resolver {
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return ResolverApi.INSTANCE.resolve(question);
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}
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private static Result happyEyeball(List<Result> r) {
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String logID = Long.toHexString(Double.doubleToLongBits(Math.random()));
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Log.d(Config.LOGTAG, Resolver.class.getSimpleName() + ": happy eyeball (" + logID + ") with " + r.toString());
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if (r.size() == 0) return null;
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Result result;
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if (r.size() == 1) {
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result = r.get(0);
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result.setLogID(logID);
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result.connect();
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return result;
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}
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for (Result res : r) {
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res.setLogID(logID);
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}
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ExecutorService executor = Executors.newFixedThreadPool(4);
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try {
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result = executor.invokeAny(r);
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executor.shutdown();
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Thread disconnector = new Thread(() -> {
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while (true) {
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try {
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if (executor.awaitTermination(5, TimeUnit.SECONDS)) break;
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Log.d(Config.LOGTAG, Resolver.class.getSimpleName() + ": happy eyeball (" + logID + ") wait for cleanup ...");
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} catch (InterruptedException e) {}
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}
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Log.i(Config.LOGTAG, Resolver.class.getSimpleName() + ": happy eyeball (" + logID + ") cleanup");
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for (Result re : r) {
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if(!re.equals(result)) re.disconnect();
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}
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});
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disconnector.start();
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Log.i(Config.LOGTAG, Resolver.class.getSimpleName() + ": happy eyeball (" + logID + ") used: " + result.toString());
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return result;
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} catch (InterruptedException e) {
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Log.e(Config.LOGTAG, Resolver.class.getSimpleName() + ": happy eyeball (" + logID + ") failed: ", e);
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return null;
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} catch (ExecutionException e) {
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Log.i(Config.LOGTAG, Resolver.class.getSimpleName() + ": happy eyeball (" + logID + ") unable to connect to one address");
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return null;
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}
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}
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private static boolean validateHostname() {
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return SERVICE != null && SERVICE.getBooleanPreference("validate_hostname", R.bool.validate_hostname);
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}
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public static class Result implements Comparable<Result> {
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public static final String DOMAIN = "domain";
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public static class Result implements Comparable<Result>, Callable<Result> {
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public static final String IP = "ip";
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public static final String HOSTNAME = "hostname";
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public static final String PORT = "port";
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public static final String PRIORITY = "priority";
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public static final String DIRECT_TLS = "directTls";
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public static final String AUTHENTICATED = "authenticated";
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private InetAddress ip;
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private DNSName hostname;
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private int port = DEFAULT_PORT_XMPP;
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private boolean directTls = false;
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private boolean authenticated = false;
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private int priority;
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private Socket socket;
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private String logID = "";
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static Result fromRecord(SRV srv, boolean directTls) {
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Result result = new Result();
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@ -290,34 +376,14 @@ public class Resolver {
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return result;
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}
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static Result createDefault(DNSName hostname, InetAddress ip) {
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static Result createDefault(DNSName hostname, InetAddress ip, int port) {
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Result result = new Result();
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result.port = DEFAULT_PORT_XMPP;
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result.port = port;
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result.hostname = hostname;
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result.ip = ip;
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return result;
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}
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static Result createDefault(DNSName hostname) {
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return createDefault(hostname, null);
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}
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public static Result fromCursor(Cursor cursor) {
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final Result result = new Result();
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try {
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result.ip = InetAddress.getByAddress(cursor.getBlob(cursor.getColumnIndex(IP)));
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} catch (UnknownHostException e) {
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result.ip = null;
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}
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final String hostname = cursor.getString(cursor.getColumnIndex(HOSTNAME));
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result.hostname = hostname == null ? null : DNSName.from(hostname);
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result.port = cursor.getInt(cursor.getColumnIndex(PORT));
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result.priority = cursor.getInt(cursor.getColumnIndex(PRIORITY));
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result.authenticated = cursor.getInt(cursor.getColumnIndex(AUTHENTICATED)) > 0;
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result.directTls = cursor.getInt(cursor.getColumnIndex(DIRECT_TLS)) > 0;
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return result;
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}
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@Override
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public boolean equals(Object o) {
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if (this == o) return true;
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@ -344,14 +410,6 @@ public class Resolver {
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return result;
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}
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public InetAddress getIp() {
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return ip;
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}
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public int getPort() {
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return port;
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}
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public DNSName getHostname() {
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return hostname;
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}
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@ -364,11 +422,15 @@ public class Resolver {
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return authenticated;
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}
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public Socket getSocket() {
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return socket;
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}
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@Override
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public String toString() {
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return "Result{" +
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"ip='" + (ip == null ? null : ip.getHostAddress()) + '\'' +
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", hostame='" + hostname.toString() + '\'' +
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", hostname='" + (hostname == null ? null : hostname.toString()) + '\'' +
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", port=" + port +
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", directTls=" + directTls +
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", authenticated=" + authenticated +
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@ -376,21 +438,47 @@ public class Resolver {
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'}';
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}
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public void connect() {
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if (this.socket != null) {
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this.disconnect();
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}
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final InetSocketAddress addr = new InetSocketAddress(this.ip, this.port);
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this.socket = new Socket();
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try {
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long time = System.currentTimeMillis();
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this.socket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
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time = System.currentTimeMillis() - time;
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if (!this.logID.isEmpty()) {
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Log.d(Config.LOGTAG, Resolver.class.getSimpleName() + ": Result (" + this.logID + ") connect: " + toString() + " after: " + time + " ms");
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} else {
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Log.d(Config.LOGTAG, Resolver.class.getSimpleName() + ": Result connect: " + toString() + " after: " + time + " ms");
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}
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} catch (IOException e) {
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this.disconnect();
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}
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}
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public void disconnect() {
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if (this.socket != null ) {
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FileBackend.close(this.socket);
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this.socket = null;
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if (!this.logID.isEmpty()) {
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Log.d(Config.LOGTAG, Resolver.class.getSimpleName() + ": Result (" + this.logID + ") disconnect: " + toString());
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} else {
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Log.d(Config.LOGTAG, Resolver.class.getSimpleName() + ": Result disconnect: " + toString());
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}
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}
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}
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||||
public void setLogID(String logID) {
|
||||
this.logID = logID;
|
||||
}
|
||||
|
||||
@Override
|
||||
public int compareTo(@NonNull Result result) {
|
||||
if (result.priority == priority) {
|
||||
if (directTls == result.directTls) {
|
||||
if (ip == null && result.ip == null) {
|
||||
return 0;
|
||||
} else if (ip != null && result.ip != null) {
|
||||
if (ip instanceof Inet4Address && result.ip instanceof Inet4Address) {
|
||||
return 0;
|
||||
} else {
|
||||
return ip instanceof Inet4Address ? -1 : 1;
|
||||
}
|
||||
} else {
|
||||
return ip != null ? -1 : 1;
|
||||
}
|
||||
return 0;
|
||||
} else {
|
||||
return directTls ? -1 : 1;
|
||||
}
|
||||
|
|
@ -398,6 +486,14 @@ public class Resolver {
|
|||
return priority - result.priority;
|
||||
}
|
||||
}
|
||||
@Override
|
||||
public Result call() throws Exception {
|
||||
this.connect();
|
||||
if (this.socket != null && this.socket.isConnected()) {
|
||||
return this;
|
||||
}
|
||||
throw new Exception("Resolver.Result was not possible to connect - should be catched by executor");
|
||||
}
|
||||
|
||||
public ContentValues toContentValues() {
|
||||
final ContentValues contentValues = new ContentValues();
|
||||
|
|
|
|||
|
|
@ -291,73 +291,50 @@ public class XmppConnection implements Runnable {
|
|||
}
|
||||
} else {
|
||||
final String domain = account.getJid().getDomain();
|
||||
final List<Resolver.Result> results;
|
||||
final Resolver.Result result;
|
||||
final boolean hardcoded = extended && !account.getHostname().isEmpty();
|
||||
if (hardcoded) {
|
||||
results = Resolver.fromHardCoded(account.getHostname(), account.getPort());
|
||||
result = Resolver.fromHardCoded(account.getHostname(), account.getPort());
|
||||
} else {
|
||||
results = Resolver.resolve(domain);
|
||||
result = Resolver.resolve(domain);
|
||||
}
|
||||
if (result == null) {
|
||||
throw new UnknownHostException();
|
||||
}
|
||||
if (Thread.currentThread().isInterrupted()) {
|
||||
Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
|
||||
return;
|
||||
}
|
||||
if (results.size() == 0) {
|
||||
Log.e(Config.LOGTAG,account.getJid().asBareJid()+": Resolver results were empty");
|
||||
try {
|
||||
// if tls is true, encryption is implied and must not be started
|
||||
features.encryptionEnabled = result.isDirectTls();
|
||||
verifiedHostname = result.isAuthenticated() ? result.getHostname().toString() : null;
|
||||
Log.d(Config.LOGTAG,"verified hostname " + verifiedHostname);
|
||||
Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
|
||||
+ ": using values from resolver " + result.toString());
|
||||
|
||||
localSocket = result.getSocket();
|
||||
|
||||
if (features.encryptionEnabled) {
|
||||
localSocket = upgradeSocketToTls(localSocket);
|
||||
}
|
||||
|
||||
localSocket.setSoTimeout(Config.SOCKET_TIMEOUT * 1000);
|
||||
if (startXmpp(localSocket)) {
|
||||
localSocket.setSoTimeout(0); //reset to 0; once the connection is established we don’t want this
|
||||
// successfully connected to server that speaks xmpp
|
||||
} else {
|
||||
FileBackend.close(localSocket);
|
||||
throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
|
||||
}
|
||||
} catch (final StateChangingException e) {
|
||||
throw e;
|
||||
} catch (InterruptedException e) {
|
||||
Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
|
||||
return;
|
||||
}
|
||||
for (Iterator<Resolver.Result> iterator = results.iterator(); iterator.hasNext(); ) {
|
||||
final Resolver.Result result = iterator.next();
|
||||
if (Thread.currentThread().isInterrupted()) {
|
||||
Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
|
||||
return;
|
||||
}
|
||||
try {
|
||||
// if tls is true, encryption is implied and must not be started
|
||||
features.encryptionEnabled = result.isDirectTls();
|
||||
verifiedHostname = result.isAuthenticated() ? result.getHostname().toString() : null;
|
||||
Log.d(Config.LOGTAG,"verified hostname "+verifiedHostname);
|
||||
final InetSocketAddress addr;
|
||||
if (result.getIp() != null) {
|
||||
addr = new InetSocketAddress(result.getIp(), result.getPort());
|
||||
Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
|
||||
+ ": using values from resolver " + (result.getHostname() == null ? "" : result.getHostname().toString()
|
||||
+ "/") + result.getIp().getHostAddress() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
|
||||
} else {
|
||||
addr = new InetSocketAddress(IDN.toASCII(result.getHostname().toString()), result.getPort());
|
||||
Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
|
||||
+ ": using values from resolver "
|
||||
+ result.getHostname().toString() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
|
||||
}
|
||||
|
||||
localSocket = new Socket();
|
||||
localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
|
||||
|
||||
if (features.encryptionEnabled) {
|
||||
localSocket = upgradeSocketToTls(localSocket);
|
||||
}
|
||||
|
||||
localSocket.setSoTimeout(Config.SOCKET_TIMEOUT * 1000);
|
||||
if (startXmpp(localSocket)) {
|
||||
localSocket.setSoTimeout(0); //reset to 0; once the connection is established we don’t want this
|
||||
break; // successfully connected to server that speaks xmpp
|
||||
} else {
|
||||
FileBackend.close(localSocket);
|
||||
throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
|
||||
}
|
||||
} catch (final StateChangingException e) {
|
||||
if (!iterator.hasNext()) {
|
||||
throw e;
|
||||
}
|
||||
} catch (InterruptedException e) {
|
||||
Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
|
||||
return;
|
||||
} catch (final Throwable e) {
|
||||
Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage() + "(" + e.getClass().getName() + ")");
|
||||
if (!iterator.hasNext()) {
|
||||
throw new UnknownHostException();
|
||||
}
|
||||
}
|
||||
} catch (final Throwable e) {
|
||||
Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage() + "(" + e.getClass().getName() + ")");
|
||||
throw new UnknownHostException();
|
||||
}
|
||||
}
|
||||
processStream();
|
||||
|
|
@ -371,8 +348,12 @@ public class XmppConnection implements Runnable {
|
|||
this.changeStatus(Account.State.SERVER_NOT_FOUND);
|
||||
} catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
|
||||
this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
|
||||
} catch (final IOException | XmlPullParserException e) {
|
||||
Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage());
|
||||
} catch (final IOException e) {
|
||||
Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": socket io :" + e.getMessage());
|
||||
this.changeStatus(Account.State.OFFLINE);
|
||||
this.attempt = Math.max(0, this.attempt - 1);
|
||||
} catch (final XmlPullParserException e) {
|
||||
Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": xml parser :" + e.getMessage());
|
||||
this.changeStatus(Account.State.OFFLINE);
|
||||
this.attempt = Math.max(0, this.attempt - 1);
|
||||
} finally {
|
||||
|
|
|
|||
Loading…
Reference in New Issue