test(java-oracle): DnsRun records DNS as Java FILIUS runs it

A resolver's lookup on the new dns-lan network (A, MX, a referral by NS, an unknown name, a missing server): every frame and the call's result. ScenarioNetwork installs a scenario's DNS servers. The Swift comparison reads only scenarios with a Swift result. Measured: Java's text messages (ID=... QR=... header, question and record lines), no question in the answer, RCODE 0 always, a referral in the answer section, an iterative resolver waiting 5 RTT per query. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 16:46:07 +00:00
parent efc7c440f6
commit 24ebcea67f
11 changed files with 914 additions and 3 deletions
@@ -0,0 +1,86 @@
+// Runs a DNS lookup on dns-lan's network in Java FILIUS (ScenarioNetwork)
+// and records what really happens: every frame each card saw, and when the
+// resolver's call started and what it returned (or that it failed).
+//
+//   DnsRun <scenario.json> <story> <milliseconds> <out.json>
+//
+// Server 192.168.0.10 knows web.filius.de, filius.de's mail exchange and
+// refers schule.de to 192.168.0.11, which knows www.schule.de. The stories,
+// each the resolver of a client (Resolver, as FILIUS' programs call it):
+//   address    192.168.0.20 asks for web.filius.de (A)
+//   mail       192.168.0.20 asks for filius.de's mail server (MX, then its A)
+//   referral   192.168.0.20 asks for www.schule.de (A), referred to .11
+//   unknown    192.168.0.20 asks for x.unbekannt.org, which no one knows
+//   noServer   192.168.0.21 asks its DNS server 192.168.0.99, which is not there
+
+import filius.software.dns.Resolver;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class DnsRun {
+    static final String CLIENT = "00000000-0000-0000-0000-000000000101";
+    static final String LOST_CLIENT = "00000000-0000-0000-0000-000000000104";
+
+    static ScenarioNetwork network;
+    static final List<Object[]> events = new ArrayList<>();
+
+    interface Call {
+        String run() throws Exception;
+    }
+
+    static void event(String what) {
+        events.add(new Object[] { System.currentTimeMillis() - network.start, what });
+    }
+
+    static void call(String label, Call call) {
+        event(label + " called");
+        try {
+            event(label + " returned " + call.run());
+        } catch (Exception e) {
+            event(label + " failed " + e.getClass().getSimpleName());
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        network = ScenarioNetwork.read(args[0]);
+        String story = args[1];
+        long end = Long.parseLong(args[2]);
+        network.start();
+        Thread.sleep(500);
+        Resolver client = network.system(CLIENT).holeDNSClient();
+        switch (story) {
+            case "address":
+                call("holeIPAdresse web.filius.de", () -> client.holeIPAdresse("web.filius.de"));
+                break;
+            case "mail":
+                call("holeIPAdresseMailServer filius.de", () -> client.holeIPAdresseMailServer("filius.de"));
+                break;
+            case "referral":
+                call("holeIPAdresse www.schule.de", () -> client.holeIPAdresse("www.schule.de"));
+                break;
+            case "unknown":
+                call("holeIPAdresse x.unbekannt.org", () -> client.holeIPAdresse("x.unbekannt.org"));
+                break;
+            case "noServer":
+                Resolver lost = network.system(LOST_CLIENT).holeDNSClient();
+                call("holeIPAdresse web.filius.de", () -> lost.holeIPAdresse("web.filius.de"));
+                break;
+            default:
+                throw new IllegalArgumentException("unknown story " + story);
+        }
+        long rest = network.start + end - System.currentTimeMillis();
+        if (rest > 0) Thread.sleep(rest);
+
+        ScenarioNetwork.Json out = new ScenarioNetwork.Json();
+        out.open('{');
+        network.writeFrames(out);
+        out.key("events").open('[');
+        for (Object[] each : events) out.open('[').number((Long) each[0]).string((String) each[1]).close(']');
+        out.close(']');
+        out.close('}');
+        network.stop();
+        ScenarioNetwork.write(args[3], out);
+        System.exit(0);
+    }
+}