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Diffstat (limited to 'src/main/java/de/pixart/messenger/utils/DNSHelper.java')
-rw-r--r--src/main/java/de/pixart/messenger/utils/DNSHelper.java299
1 files changed, 0 insertions, 299 deletions
diff --git a/src/main/java/de/pixart/messenger/utils/DNSHelper.java b/src/main/java/de/pixart/messenger/utils/DNSHelper.java
deleted file mode 100644
index 70f600375..000000000
--- a/src/main/java/de/pixart/messenger/utils/DNSHelper.java
+++ /dev/null
@@ -1,299 +0,0 @@
-package de.pixart.messenger.utils;
-
-import android.annotation.TargetApi;
-import android.content.Context;
-import android.net.ConnectivityManager;
-import android.net.LinkProperties;
-import android.net.Network;
-import android.net.RouteInfo;
-import android.os.Build;
-import android.os.Bundle;
-import android.os.Parcelable;
-import android.util.Log;
-
-import java.io.IOException;
-import java.net.Inet4Address;
-import java.net.InetAddress;
-import java.net.SocketTimeoutException;
-import java.net.UnknownHostException;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-import java.util.Locale;
-import java.util.Map;
-import java.util.Random;
-import java.util.TreeMap;
-import java.util.regex.Pattern;
-
-import de.measite.minidns.Client;
-import de.measite.minidns.DNSMessage;
-import de.measite.minidns.Record;
-import de.measite.minidns.Record.CLASS;
-import de.measite.minidns.Record.TYPE;
-import de.measite.minidns.record.A;
-import de.measite.minidns.record.AAAA;
-import de.measite.minidns.record.Data;
-import de.measite.minidns.record.SRV;
-import de.measite.minidns.util.NameUtil;
-import de.pixart.messenger.Config;
-import de.pixart.messenger.xmpp.jid.Jid;
-
-public class DNSHelper {
-
- public static final Pattern PATTERN_IPV4 = Pattern.compile("\\A(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\z");
- public static final Pattern PATTERN_IPV6_HEX4DECCOMPRESSED = Pattern.compile("\\A((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?) ::((?:[0-9A-Fa-f]{1,4}:)*)(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\z");
- public static final Pattern PATTERN_IPV6_6HEX4DEC = Pattern.compile("\\A((?:[0-9A-Fa-f]{1,4}:){6,6})(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\z");
- public static final Pattern PATTERN_IPV6_HEXCOMPRESSED = Pattern.compile("\\A((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)::((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)\\z");
- public static final Pattern PATTERN_IPV6 = Pattern.compile("\\A(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}\\z");
-
- protected static Client client = new Client();
-
- protected static Context context;
-
- public static Bundle getSRVRecord(final Jid jid, Context context) throws IOException {
- DNSHelper.context = context;
- final String host = jid.getDomainpart();
- final List<InetAddress> servers = Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ? getDnsServers(context) : getDnsServersPreLollipop();
- Bundle b = new Bundle();
- boolean interrupted = false;
- for (InetAddress server : servers) {
- if (Thread.currentThread().isInterrupted()) {
- interrupted = true;
- break;
- }
- b = queryDNS(host, server);
- if (b.containsKey("values")) {
- return b;
- }
- }
- if (!b.containsKey("values")) {
- Log.d(Config.LOGTAG, (interrupted ? "Thread interrupted during DNS query" : "all dns queries failed") + ". provide fallback A record");
- ArrayList<Parcelable> values = new ArrayList<>();
- values.add(createNamePortBundle(host, 5222, false));
- b.putParcelableArrayList("values", values);
- }
- return b;
- }
-
- @TargetApi(21)
- private static List<InetAddress> getDnsServers(Context context) {
- List<InetAddress> servers = new ArrayList<>();
- ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
- Network[] networks = connectivityManager == null ? null : connectivityManager.getAllNetworks();
- if (networks == null) {
- return getDnsServersPreLollipop();
- }
- for (int i = 0; i < networks.length; ++i) {
- LinkProperties linkProperties = connectivityManager.getLinkProperties(networks[i]);
- if (linkProperties != null) {
- if (hasDefaultRoute(linkProperties)) {
- servers.addAll(0, getIPv4First(linkProperties.getDnsServers()));
- } else {
- servers.addAll(getIPv4First(linkProperties.getDnsServers()));
- }
- }
- }
- if (servers.size() > 0) {
- Log.d(Config.LOGTAG, "used lollipop variant to discover dns servers in " + networks.length + " networks");
- }
- return servers.size() > 0 ? servers : getDnsServersPreLollipop();
- }
-
- private static List<InetAddress> getIPv4First(List<InetAddress> in) {
- List<InetAddress> out = new ArrayList<>();
- for (InetAddress addr : in) {
- if (addr instanceof Inet4Address) {
- out.add(0, addr);
- } else {
- out.add(addr);
- }
- }
- return out;
- }
-
- @TargetApi(Build.VERSION_CODES.LOLLIPOP)
- private static boolean hasDefaultRoute(LinkProperties linkProperties) {
- for (RouteInfo route : linkProperties.getRoutes()) {
- if (route.isDefaultRoute()) {
- return true;
- }
- }
- return false;
- }
-
- private static List<InetAddress> getDnsServersPreLollipop() {
- List<InetAddress> servers = new ArrayList<>();
- String[] dns = client.findDNS();
- for (int i = 0; i < dns.length; ++i) {
- try {
- servers.add(InetAddress.getByName(dns[i]));
- } catch (UnknownHostException e) {
- //ignore
- }
- }
- return servers;
- }
-
- private static class TlsSrv {
- private final SRV srv;
- private final boolean tls;
-
- public TlsSrv(SRV srv, boolean tls) {
- this.srv = srv;
- this.tls = tls;
- }
- }
-
- private static void fillSrvMaps(final String qname, final InetAddress dnsServer, final Map<Integer, List<TlsSrv>> priorities, final Map<String, List<String>> ips4, final Map<String, List<String>> ips6, final boolean tls) throws IOException {
- final DNSMessage message = client.query(qname, TYPE.SRV, CLASS.IN, dnsServer.getHostAddress());
- for (Record[] rrset : new Record[][]{message.getAnswers(), message.getAdditionalResourceRecords()}) {
- for (Record rr : rrset) {
- Data d = rr.getPayload();
- final String name = rr.getName() != null ? rr.getName().toLowerCase(Locale.US) : null;
- if (d instanceof SRV && NameUtil.idnEquals(qname, name)) {
- SRV srv = (SRV) d;
- if (!priorities.containsKey(srv.getPriority())) {
- priorities.put(srv.getPriority(), new ArrayList<TlsSrv>());
- }
- priorities.get(srv.getPriority()).add(new TlsSrv(srv, tls));
- } else if (d instanceof SRV) {
- Log.d(Config.LOGTAG, "found unrecognized SRV record with name: " + name);
- }
- if (d instanceof A) {
- A a = (A) d;
- if (!ips4.containsKey(name)) {
- ips4.put(name, new ArrayList<String>());
- }
- ips4.get(name).add(a.toString());
- }
- if (d instanceof AAAA) {
- AAAA aaaa = (AAAA) d;
- if (!ips6.containsKey(name)) {
- ips6.put(name, new ArrayList<String>());
- }
- ips6.get(name).add("[" + aaaa.toString() + "]");
- }
- }
- }
- }
-
- public static Bundle queryDNS(String host, InetAddress dnsServer) {
- Bundle bundle = new Bundle();
- try {
- client.setTimeout(Config.SOCKET_TIMEOUT * 1000);
- final String qname = "_xmpp-client._tcp." + host.toLowerCase(Locale.US);
- final String tlsQname = "_xmpps-client._tcp." + host.toLowerCase(Locale.US);
- Log.d(Config.LOGTAG, "using dns server: " + dnsServer.getHostAddress() + " to look up " + host);
-
- final Map<Integer, List<TlsSrv>> priorities = new TreeMap<>();
- final Map<String, List<String>> ips4 = new TreeMap<>();
- final Map<String, List<String>> ips6 = new TreeMap<>();
-
- fillSrvMaps(qname, dnsServer, priorities, ips4, ips6, false);
- fillSrvMaps(tlsQname, dnsServer, priorities, ips4, ips6, true);
-
- final List<TlsSrv> result = new ArrayList<>();
- for (final List<TlsSrv> s : priorities.values()) {
- result.addAll(s);
- }
-
- final ArrayList<Bundle> values = new ArrayList<>();
- if (result.size() == 0) {
- DNSMessage response;
- try {
- response = client.query(host, TYPE.A, CLASS.IN, dnsServer.getHostAddress());
- for (int i = 0; i < response.getAnswers().length; ++i) {
- values.add(createNamePortBundle(host, 5222, response.getAnswers()[i].getPayload(), false));
- }
- } catch (SocketTimeoutException e) {
- Log.d(Config.LOGTAG, "ignoring timeout exception when querying A record on " + dnsServer.getHostAddress());
- }
- try {
- response = client.query(host, TYPE.AAAA, CLASS.IN, dnsServer.getHostAddress());
- for (int i = 0; i < response.getAnswers().length; ++i) {
- values.add(createNamePortBundle(host, 5222, response.getAnswers()[i].getPayload(), false));
- }
- } catch (SocketTimeoutException e) {
- Log.d(Config.LOGTAG, "ignoring timeout exception when querying AAAA record on " + dnsServer.getHostAddress());
- }
- values.add(createNamePortBundle(host, 5222, false));
- bundle.putParcelableArrayList("values", values);
- return bundle;
- }
- for (final TlsSrv tlsSrv : result) {
- final SRV srv = tlsSrv.srv;
- final String name = srv.getName() != null ? srv.getName().toLowerCase(Locale.US) : null;
- if (ips6.containsKey(name)) {
- values.add(createNamePortBundle(name, srv.getPort(), ips6, tlsSrv.tls));
- } else {
- try {
- DNSMessage response = client.query(name, TYPE.AAAA, CLASS.IN, dnsServer.getHostAddress());
- for (int i = 0; i < response.getAnswers().length; ++i) {
- values.add(createNamePortBundle(name, srv.getPort(), response.getAnswers()[i].getPayload(), tlsSrv.tls));
- }
- } catch (SocketTimeoutException e) {
- Log.d(Config.LOGTAG, "ignoring timeout exception when querying AAAA record on " + dnsServer.getHostAddress());
- }
- }
- if (ips4.containsKey(name)) {
- values.add(createNamePortBundle(name, srv.getPort(), ips4, tlsSrv.tls));
- } else {
- DNSMessage response = client.query(name, TYPE.A, CLASS.IN, dnsServer.getHostAddress());
- for (int i = 0; i < response.getAnswers().length; ++i) {
- values.add(createNamePortBundle(name, srv.getPort(), response.getAnswers()[i].getPayload(), tlsSrv.tls));
- }
- }
- values.add(createNamePortBundle(name, srv.getPort(), tlsSrv.tls));
- }
- bundle.putParcelableArrayList("values", values);
- } catch (SocketTimeoutException e) {
- bundle.putString("error", "timeout");
- } catch (Exception e) {
- bundle.putString("error", "unhandled");
- }
- return bundle;
- }
-
- private static Bundle createNamePortBundle(String name, int port, final boolean tls) {
- Bundle namePort = new Bundle();
- namePort.putString("name", name);
- namePort.putBoolean("tls", tls);
- namePort.putInt("port", port);
- return namePort;
- }
-
- private static Bundle createNamePortBundle(String name, int port, Map<String, List<String>> ips, final boolean tls) {
- Bundle namePort = new Bundle();
- namePort.putString("name", name);
- namePort.putBoolean("tls", tls);
- namePort.putInt("port", port);
- if (ips != null) {
- List<String> ip = ips.get(name);
- Collections.shuffle(ip, new Random());
- namePort.putString("ip", ip.get(0));
- }
- return namePort;
- }
-
- private static Bundle createNamePortBundle(String name, int port, Data data, final boolean tls) {
- Bundle namePort = new Bundle();
- namePort.putString("name", name);
- namePort.putBoolean("tls", tls);
- namePort.putInt("port", port);
- if (data instanceof A) {
- namePort.putString("ip", data.toString());
- } else if (data instanceof AAAA) {
- namePort.putString("ip", "[" + data.toString() + "]");
- }
- return namePort;
- }
-
- public static boolean isIp(final String server) {
- return server != null && (
- PATTERN_IPV4.matcher(server).matches()
- || PATTERN_IPV6.matcher(server).matches()
- || PATTERN_IPV6_6HEX4DEC.matcher(server).matches()
- || PATTERN_IPV6_HEX4DECCOMPRESSED.matcher(server).matches()
- || PATTERN_IPV6_HEXCOMPRESSED.matcher(server).matches());
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-16 04:20:50 +0000