Implement updating of DuckDNS

README.md

@@ -1,7 +1,9 @@
 # ddnsclient
 
-This application can be use to update dynamic hostnames. Currently it implements only the ddnss.de provider, but it
+This application can be use to update dynamic hostnames. Currently it implements the following DynDNS providers:
-is extensible and more providers can be added easily.
+
+- ddnss.de
+- duckdns.org
 
 This project uses Quarkus.
 

src/main/java/de/rpr/ddnsclient/Updater.java

@@ -45,7 +45,7 @@ public class Updater {
     }
 
     void run() {
-        log.trace("Updater running.");
+        log.info("Updater running.");
 
         if (config.isEmpty()) {
             throw new IllegalStateException("Missing configuration");
@@ -58,7 +58,7 @@ public class Updater {
 
             if (updateMap.containsKey(cfg.hostname())
                     && Duration.between(updateMap.get(cfg.hostname()), LocalDateTime.now()).toSeconds() < backoff.toSeconds()) {
-                log.debug("Back-off period, skipping update.");
+                log.info("Back-off period, skipping update.");
                 return;
             }
 
@@ -73,7 +73,7 @@ public class Updater {
                 dynDns.update(cfg.hostname(), publicIps, new DyndnsAuth(null, null, cfg.token()));
                 updateMap.put(cfg.hostname(), LocalDateTime.now());
             } else {
-                log.debugf("Hostname is up-to-date.", cfg.hostname());
+                log.infof("Hostname %s is up-to-date.", cfg.hostname());
             }
         });
     }

src/main/java/de/rpr/ddnsclient/dyndns/Ddnss.java

@@ -6,9 +6,7 @@ import jakarta.enterprise.context.ApplicationScoped;
 import org.jboss.logging.Logger;
 
 import java.io.IOException;
-import java.net.URI;
 import java.net.http.HttpClient;
-import java.net.http.HttpRequest;
 import java.net.http.HttpResponse;
 import java.text.MessageFormat;
 
@@ -29,26 +27,27 @@ public class Ddnss implements DynDns {
     }
 
     public void update(String hostname, IPs currentIps, DyndnsAuth auth) {
-
+        log.tracef("Updating ddnss hostname %s", hostname);
-        String updateUrl = MessageFormat.format("https://ddnss.de/upd.php?key={0}&host={1}&ip={2}&ip6={3}",
-                auth.token(), hostname, currentIps.v4(), currentIps.v6());
 
         try (HttpClient http = httpClientFactory.create()) {
-
+            String updateUrl = getUpdateUrl(hostname, currentIps, auth.token());
-            HttpRequest request = HttpRequest.newBuilder()
+            HttpResponse<String> response = http.send(getRequest(updateUrl), HttpResponse.BodyHandlers.ofString());
-                    .header("User-Agent", "ddns-client")
-                    .GET()
-                    .uri(URI.create(updateUrl))
-                    .build();
-
-            HttpResponse<String> response = http.send(request, HttpResponse.BodyHandlers.ofString());
             if (response.statusCode() != 200) {
                 log.errorf("Couldn't update hostname %s." + hostname);
             }
-            log.info("Hostname updated.");
+            log.infof("Hostname %s updated.", hostname);
         } catch (IOException | InterruptedException e) {
             throw new RuntimeException(e);
         }
     }
 
+    private String getUpdateUrl(String hostname, IPs currentIps, String token) {
+        if (currentIps.v4().isPresent() && currentIps.v6().isPresent()) {
+            return MessageFormat.format("https://ddnss.de/upd.php?key={0}&host={1}&ip={2}&ip6={3}", token, hostname, currentIps.v4().get(), currentIps.v6().get());
+        } else if (currentIps.v4().isPresent()) {
+            return MessageFormat.format("https://ddnss.de/upd.php?key={0}&host={1}&ip={2}", token, hostname, currentIps.v4());
+        }
+        throw new RuntimeException("No ips to update!");
+    }
+
 }

src/main/java/de/rpr/ddnsclient/dyndns/DuckDNS.java

@@ -0,0 +1,56 @@
+package de.rpr.ddnsclient.dyndns;
+
+import de.rpr.ddnsclient.model.DyndnsAuth;
+import de.rpr.ddnsclient.model.IPs;
+import jakarta.enterprise.context.ApplicationScoped;
+import org.jboss.logging.Logger;
+
+import java.io.IOException;
+import java.net.http.HttpClient;
+import java.net.http.HttpResponse;
+import java.text.MessageFormat;
+
+@ApplicationScoped
+public class DuckDNS implements DynDns {
+
+    private static final Logger log = Logger.getLogger(DuckDNS.class);
+
+    private final HttpClientFactory httpClientFactory;
+
+    public DuckDNS(HttpClientFactory httpClientFactory) {
+        this.httpClientFactory = httpClientFactory;
+    }
+
+    @Override
+    public String name() {
+        return "duckdns";
+    }
+
+    @Override
+    public void update(String hostname, IPs currentIps, DyndnsAuth auth) {
+        log.tracef("Updating duckdns hostname %s", hostname);
+
+        try (HttpClient http = httpClientFactory.create()) {
+            String updateUrl = getUpdateUrl(hostname, currentIps, auth.token());
+            HttpResponse<String> response = http.send(getRequest(updateUrl), HttpResponse.BodyHandlers.ofString());
+            if (response.statusCode() != 200) {
+                log.errorf("Couldn't update hostname %s." + hostname);
+            } else if (!response.body().equals("OK")) {
+                throw new RuntimeException("Couldn't update hostname!");
+            }
+            log.infof("Hostname %s updated.", hostname);
+        } catch (IOException | InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private String getUpdateUrl(String hostname, IPs currentIps, String token) {
+        if (currentIps.v4().isPresent() && currentIps.v6().isPresent()) {
+            return MessageFormat.format("https://www.duckdns.org/update?domains={0}&token={1}&ip={2}&ipv6={3}", hostname, token, currentIps.v4().get(), currentIps.v6().get());
+        } else if (currentIps.v4().isPresent()) {
+            return MessageFormat.format("https://www.duckdns.org/update?domains={0}&token={1}&ip={2}", hostname, token, currentIps.v4().get());
+        }
+        throw new RuntimeException("No ips to update!");
+    }
+
+}

src/main/java/de/rpr/ddnsclient/dyndns/DynDns.java

@@ -3,9 +3,20 @@ package de.rpr.ddnsclient.dyndns;
 import de.rpr.ddnsclient.model.DyndnsAuth;
 import de.rpr.ddnsclient.model.IPs;
 
+import java.net.URI;
+import java.net.http.HttpRequest;
+
 public interface DynDns {
 
     String name();
 
     void update(String hostname, IPs currentIps, DyndnsAuth auth);
+
+    default HttpRequest getRequest(String updateUrl) {
+        return HttpRequest.newBuilder()
+                .header("User-Agent", "ddns-client")
+                .GET()
+                .uri(URI.create(updateUrl))
+                .build();
+    }
 }

src/main/java/de/rpr/ddnsclient/lookup/DnsJava.java

@@ -3,6 +3,7 @@ package de.rpr.ddnsclient.lookup;
 import de.rpr.ddnsclient.model.IPs;
 import jakarta.enterprise.context.ApplicationScoped;
 import org.eclipse.microprofile.config.inject.ConfigProperty;
+import org.jboss.logging.Logger;
 import org.xbill.DNS.Record;
 import org.xbill.DNS.*;
 
@@ -11,6 +12,8 @@ import java.util.Optional;
 @ApplicationScoped
 public class DnsJava implements DnsResolver {
 
+    private static final Logger log = Logger.getLogger(DnsJava.class);
+
     private final String resolverAddress;
 
     public DnsJava(@ConfigProperty(name = "ddnsclient.dns.resolver", defaultValue = "9.9.9.9") String resolverAddress) {
@@ -19,19 +22,24 @@ public class DnsJava implements DnsResolver {
 
     @Override
     public IPs resolve(String hostname) {
-        String v4 = getIp(hostname, Type.A).orElseThrow(() -> new RuntimeException("Missing A Record"));
+        Optional<String> v4 = getIp(hostname, RecordType.A);
-        String v6 = getIp(hostname, Type.AAAA).orElseThrow(() -> new RuntimeException("Missing AAAA Record"));
+        Optional<String> v6 = getIp(hostname, RecordType.AAAA);
         return new IPs(v4, v6);
     }
 
-    private Optional<String> getIp(String hostname, int type) {
+    private Optional<String> getIp(String hostname, RecordType type) {
         try {
             SimpleResolver resolver = new SimpleResolver(resolverAddress);
 
-            Lookup lookup = new Lookup(hostname, type);
+            Lookup lookup = new Lookup(hostname, type.value);
             lookup.setResolver(resolver);
 
             Record[] records = lookup.run();
+            if (records == null || records.length == 0) {
+                log.infof("No record for type %s found", type.name());
+                return Optional.empty();
+            }
+
             for (Record record : records) {
                 if (record instanceof ARecord) {
                     return Optional.of(((ARecord) record).getAddress().getHostAddress());
@@ -45,4 +53,15 @@ public class DnsJava implements DnsResolver {
             throw new RuntimeException(e);
         }
     }
+
+    private enum RecordType {
+        A(1),
+        AAAA(28);
+
+        private final int value; // org.bill.DNS.Type.AAAA
+
+        RecordType(int value) {
+            this.value = value;
+        }
+    }
 }

src/main/java/de/rpr/ddnsclient/lookup/PublicIpLookup.java

@@ -20,10 +20,7 @@ public class PublicIpLookup {
     private final CurlProcessFactory curlProcessFactory;
     private final Optional<String> configuredProvider;
 
-    PublicIpLookup(
+    PublicIpLookup(CurlProcessFactory curlProcessFactory, @ConfigProperty(name = "ddnsclient.ip-provider") Optional<String> configuredProvider) {
-            CurlProcessFactory curlProcessFactory,
-            @ConfigProperty(name = "ddnsclient.ip-provider") Optional<String> configuredProvider
-    ) {
         this.curlProcessFactory = curlProcessFactory;
         this.configuredProvider = configuredProvider;
     }
@@ -33,10 +30,9 @@ public class PublicIpLookup {
     void onStart(@Observes StartupEvent event) {
         try {
             configuredProvider.ifPresent(it -> {
-                        log.tracef("Setting ip lookup provider %s", it);
+                log.tracef("Setting ip lookup provider %s", it);
-                        provider = Optional.of(IpLookupProviders.get(it));
+                provider = Optional.of(IpLookupProviders.get(it));
-                    }
+            });
-            );
         } catch (Exception e) {
             throw new IllegalStateException("Unknow provider configured!", e);
         }
@@ -48,8 +44,8 @@ public class PublicIpLookup {
         try {
             String provider = this.provider.map(it -> it.url).orElseGet(() -> IpLookupProviders.random().url);
 
-            String v4 = getIp(provider, CurlProcessFactory.IpClass.V4);
+            Optional<String> v4 = getIp(provider, CurlProcessFactory.IpClass.V4);
-            String v6 = getIp(provider, CurlProcessFactory.IpClass.V6);
+            Optional<String> v6 = getIp(provider, CurlProcessFactory.IpClass.V6);
 
             return new IPs(v4, v6);
         } catch (Exception e) {
@@ -57,7 +53,7 @@ public class PublicIpLookup {
         }
     }
 
-    private String getIp(String provider, CurlProcessFactory.IpClass ipClass) {
+    private Optional<String> getIp(String provider, CurlProcessFactory.IpClass ipClass) {
         try {
             Process curlProcess = curlProcessFactory.create(provider, ipClass).start();
             curlProcess.waitFor();
@@ -65,9 +61,10 @@ public class PublicIpLookup {
             BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
             String ip = reader.readLine();
             log.tracef("Retrieved ip: %s", ip);
-            return ip;
+            return Optional.of(ip);
         } catch (Exception e) {
-            throw new RuntimeException(e);
+            log.errorf("Couldn't lookup ip. Provider: %s, ipClass: %s", provider, ipClass.name());
+            return Optional.empty();
         }
     }
 

src/main/java/de/rpr/ddnsclient/model/IPs.java

@@ -1,6 +1,11 @@
 package de.rpr.ddnsclient.model;
 
-public record IPs(String v4, String v6) {
+import java.util.Optional;
 
+public record IPs(Optional<String> v4, Optional<String> v6) {
+
+    public IPs(String v4, String v6) {
+        this(Optional.ofNullable(v4), Optional.ofNullable(v6));
+    }
 }
 

src/test/java/de/rpr/ddnsclient/lookup/DnsJavaTest.java

@@ -10,7 +10,7 @@ class DnsJavaTest {
     @Test
     void test() {
         IPs result = new DnsJava("9.9.9.9").resolve("example.com");
-        assertThat(result.v4()).isNotBlank();
+        assertThat(result.v4()).isPresent();
-        assertThat(result.v6()).isNotBlank();
+        assertThat(result.v6()).isPresent();
     }
 }