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Diffstat (limited to 'src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java')
-rw-r--r--src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java160
1 files changed, 0 insertions, 160 deletions
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java
deleted file mode 100644
index 90618292..00000000
--- a/src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java
+++ /dev/null
@@ -1,160 +0,0 @@
-package de.thedevstack.conversationsplus.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 java.io.IOException;
-import java.net.InetAddress;
-import java.net.UnknownHostException;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.TreeSet;
-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.Data;
-import de.measite.minidns.record.SRV;
-import de.measite.minidns.util.NameUtil;
-import de.thedevstack.android.logcat.Logging;
-import de.thedevstack.conversationsplus.ConversationsPlusApplication;
-import de.thedevstack.conversationsplus.dto.SrvRecord;
-import de.thedevstack.conversationsplus.Config;
-import de.thedevstack.conversationsplus.xmpp.jid.Jid;
-
-public class DNSHelper {
- private static final String CLIENT_SRV_PREFIX = "_xmpp-client._tcp.";
- private static final String SECURE_CLIENT_SRV_PREFIX = "_xmpps-client._tcp.";
- private 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");
- private 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");
- private 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");
- private 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");
- private 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();
-
- static {
- client.setTimeout(Config.PING_TIMEOUT * 1000);
- }
-
- /**
- * Queries the SRV record for the server JID.
- * This method uses all available Domain Name Servers.
- * @param jid the server JID
- * @return TreeSet with SrvRecords. If no SRV record is found for JID an empty TreeSet is returned.
- */
- public static final TreeSet<SrvRecord> querySrvRecord(Jid jid) {
- String host = jid.getDomainpart();
- TreeSet<SrvRecord> result = new TreeSet<>();
-
- final List<InetAddress> dnsServers = Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ? getDnsServers() : getDnsServersPreLollipop();
-
- if (dnsServers != null) {
- for (InetAddress dnsServer : dnsServers) {
- result = querySrvRecord(host, dnsServer);
- if (!result.isEmpty()) {
- break;
- }
- }
- }
-
- return result;
- }
-
- @TargetApi(21)
- private static List<InetAddress> getDnsServers() {
- List<InetAddress> servers = new ArrayList<>();
- ConnectivityManager connectivityManager = (ConnectivityManager) ConversationsPlusApplication.getInstance().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, linkProperties.getDnsServers());
- } else {
- servers.addAll(linkProperties.getDnsServers());
- }
- }
- }
- if (servers.size() > 0) {
- Logging.d("dns", "used lollipop variant to discover dns servers in " + networks.length + " networks");
- }
- return servers.size() > 0 ? servers : getDnsServersPreLollipop();
- }
-
- @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;
- }
-
- /**
- * Queries the SRV record for an host from the given Domain Name Server.
- * @param host the host to query for
- * @param dnsServerAddress the DNS to query on
- * @return TreeSet with SrvRecords.
- */
- private static final TreeSet<SrvRecord> querySrvRecord(String host, InetAddress dnsServerAddress) {
- TreeSet<SrvRecord> result = new TreeSet<>();
- querySrvRecord(host, dnsServerAddress, false, result);
- querySrvRecord(host, dnsServerAddress, true, result);
- return result;
- }
-
- private static final void querySrvRecord(String host, InetAddress dnsServerAddress, boolean tlsSrvRecord, TreeSet<SrvRecord> result) {
- String qname = (tlsSrvRecord ? SECURE_CLIENT_SRV_PREFIX : CLIENT_SRV_PREFIX) + host;
- String dnsServerHostAddress = dnsServerAddress.getHostAddress();
- 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);
- }
- }
- } catch (IOException e) {
- Logging.d("dns", "Error while retrieving SRV record '" + qname + "' for '" + host + "' from DNS '" + dnsServerHostAddress + "': " + e.getMessage());
- }
- }
-
- 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 2024-06-27 02:43:11 +0000