diff options
Diffstat (limited to 'src/main/java/de/pixart/messenger/utils/DNSHelper.java')
| -rw-r--r-- | src/main/java/de/pixart/messenger/utils/DNSHelper.java | 464 |
1 files changed, 232 insertions, 232 deletions
diff --git a/src/main/java/de/pixart/messenger/utils/DNSHelper.java b/src/main/java/de/pixart/messenger/utils/DNSHelper.java index 4a692c910..70f600375 100644 --- a/src/main/java/de/pixart/messenger/utils/DNSHelper.java +++ b/src/main/java/de/pixart/messenger/utils/DNSHelper.java @@ -40,260 +40,260 @@ 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"); + 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 Client client = new Client(); - protected static Context context; + protected static Context context; - public static Bundle getSRVRecord(final Jid jid, Context context) throws IOException { - DNSHelper.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; - } + 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(); - } + @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; - } + 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; - } + @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 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; + private static class TlsSrv { + private final SRV srv; + private final boolean tls; - public TlsSrv(SRV srv, boolean tls) { - this.srv = srv; - this.tls = 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(); + 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)); + 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() + "]"); - } - } - } - } + 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); + 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<>(); + 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); + 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 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 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; - } + 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, 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, 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; - } + 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()); - } + 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()); + } } |