test(java-oracle): TcpRun records TCP as Java FILIUS runs it
Three stories of socket calls on tcp-lan's network (exchange, closedPort, lostData): every frame with TCP flags and numbers, when each call started, returned or failed, and each socket's states. Network building and the packet log move from DhcpRun to ScenarioNetwork. Measured: 3 RTT per attempt (8250 ms at 90 %), an orderly close after a failed send, TIME_WAIT of 3 RTT, the passive side closing by itself on FIN, one SYN only (Java's retry loop ends after the first timeout). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Claude Opus 5.5
@@ -185,3 +185,40 @@ eine Kabellänge später.
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Filius' Mitschnitt selbst ist dabei nicht ganz zuverlässig: Starten zwei
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Clients zugleich, fehlt auf der Karte des zweiten dessen eigenes DISCOVER
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(vier von vier Läufen von `dhcp-lan`; der Server empfängt es).
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## TCP zur Laufzeit
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`TcpRun` spielt auf dem Netz von `tcp-lan` (Server 192.168.0.10, Clients .20
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und .30) einen festen Ablauf von Socket-Aufrufen ab, wie Filius' Anwendungen
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sie machen, den Server in einem eigenen Thread. Es schreibt nach
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`tcp-java-<ablauf>.java.json` die Frames jeder Karte (mit TCP-Flags,
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Sequenz- und Bestätigungsnummer), wann jeder Aufruf begann, zurückkam oder
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scheiterte, und jeden Zustand jedes Sockets (alle 2 ms abgefragt). Netzbau
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und Mitschnitt teilen `DhcpRun` und `TcpRun` in `ScenarioNetwork`.
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* `exchange`: Verbindung zu Port 80, `GET /`, Antwort 3000 × `x` (drei
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Segmente), der Client schließt, der Server eine Sekunde nach
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`CLOSE_WAIT`.
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* `closedPort`: Verbindung zu Port 81, auf dem niemand lauscht.
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* `lostData`: verbunden, dann gehen alle Frames verloren
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(`Verbindung.setDrop`, wie der Paketverlust des Kerns), während der Client
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sendet; der Verlust endet, wenn `senden` scheitert.
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Gemessen (30.09.2026, 90 %, RTT 2750 ms), was Swift anders macht:
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* Jeder Versuch wartet 3 RTT (8250 ms): Daten gehen dreimal hinaus (1720,
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9970, 18220 ms), `senden` scheitert 8250 ms nach dem dritten.
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* Scheitert `senden`, schließt Java ordentlich: FIN, ACK, FIN, ACK. Swift
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setzt den Socket ohne FIN auf CLOSED.
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* `TIME_WAIT` dauert 3 RTT (8250 ms; oder bis zum nächsten Segment), nicht
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eine RTT.
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* Die Gegenseite schließt von selbst: Kommt ein FIN, geht Javas
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Socket-Thread aus `listen` in `close` und sendet sein FIN sofort
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(`LAST_ACK` rund 60 ms nach dem FIN), nicht erst, wenn die Anwendung
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`schliessen` aufruft.
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* Der Client sendet nur **ein** SYN: Nach dem ersten Zeitablauf setzt
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`connectClientMode` `closeSocket`, und die Schleife über drei Versuche
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endet (`verbinden` scheitert nach 3 RTT). Der Server-Socket wiederholt sein
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SYN+ACK nie.
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* Startnummern aus einem Zähler über alle TCP-Sockets (1000000, 2000000, …),
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wie im Kern; der freie Port ist zufällig.
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@@ -21,7 +21,7 @@ if [ ! -f "$upstream/target/filius.jar" ]; then
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fi
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classpath="$upstream/target/filius.jar:$upstream/target/lib/*"
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mkdir -p "$here/.build"
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javac -encoding UTF-8 -d "$here/.build" -cp "$classpath" "$here/src/FlsOracle.java" "$here/src/GetterDefaults.java" "$here/src/IpCheckCases.java" "$here/src/DnsHostsCases.java" "$here/src/EmailFileCases.java" "$here/src/BeansDump.java" "$here/src/Base64Cases.java" "$here/src/DhcpRun.java"
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javac -encoding UTF-8 -d "$here/.build" -cp "$classpath" "$here/src/FlsOracle.java" "$here/src/GetterDefaults.java" "$here/src/IpCheckCases.java" "$here/src/DnsHostsCases.java" "$here/src/EmailFileCases.java" "$here/src/BeansDump.java" "$here/src/Base64Cases.java" "$here/src/ScenarioNetwork.java" "$here/src/DhcpRun.java" "$here/src/TcpRun.java"
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# FILIUS writes its settings below $HOME; keep them out of the real one.
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mkdir -p "$here/.build/home"
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# Removed first: a crashed run must not leave the previous result standing.
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@@ -119,3 +119,14 @@ for run in dhcp-lan:8000 dhcp-two-servers:8000 dhcp-conflict:25000 dhcp-no-serve
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"$root/packages/core/test/scenarios/$name.scenario.json" "${run##*:}" "$output" 2>&1 | grep -v 'logback\|^$' || true
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test -s "$output"
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done
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# TCP as Java FILIUS runs it: stories of socket calls on tcp-lan's network
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# (TcpRun); frames, calls and socket states, for the core's TCP comparison.
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for run in exchange:30000 closedPort:30000 lostData:45000; do
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story="${run%%:*}"
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output="$root/packages/core/test/scenarios/tcp-java-$story.java.json"
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rm -f "$output"
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HOME="$here/.build/home" xvfb-run -a java -cp "$classpath:$here/.build" TcpRun \
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"$root/packages/core/test/scenarios/tcp-lan.scenario.json" "$story" "${run##*:}" "$output" 2>&1 | grep -v 'logback\|^$' || true
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test -s "$output"
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done
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@@ -1,396 +1,26 @@
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// Runs a core scenario's network in Java FILIUS and records what DHCP really
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// does: every frame each network card saw (FILIUS' own packet log, the
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// Lauscher) and each host's address configuration at the end.
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// Runs a core scenario's network in Java FILIUS (ScenarioNetwork) and records
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// what DHCP really does: every frame each network card saw and each host's
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// address configuration at the end.
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//
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// DhcpRun <scenario.json> <milliseconds> <out.json>
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//
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// The network is built from the scenario (nodes, links, devices,
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// dhcpServers, dhcpClients; steps are ignored) the way the core reads it: a
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// port's MAC is its `mac`, else the core's stableGeneratedMacAddress. The
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// simulation then runs as the action mode starts it (every system software's
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// starten()), in real time, for the given milliseconds. Threads make the
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// times vary from run to run; the order of one client's messages does not.
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import filius.gui.GUIContainer;
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import filius.hardware.Kabel;
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import filius.hardware.NetzwerkInterface;
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import filius.hardware.Port;
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import filius.hardware.knoten.InternetKnoten;
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import filius.hardware.knoten.Knoten;
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import filius.hardware.knoten.LokalerKnoten;
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import filius.hardware.knoten.Notebook;
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import filius.hardware.knoten.Rechner;
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import filius.hardware.knoten.Switch;
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import filius.rahmenprogramm.nachrichten.Lauscher;
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import filius.software.dhcp.DHCPServer;
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import filius.software.netzzugangsschicht.EthernetFrame;
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import filius.software.system.InternetKnotenBetriebssystem;
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import filius.software.transportschicht.Segment;
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import filius.software.vermittlungsschicht.ArpPaket;
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import filius.software.vermittlungsschicht.IcmpPaket;
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import filius.software.vermittlungsschicht.IpPaket;
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import java.io.FileOutputStream;
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import java.io.OutputStreamWriter;
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import java.io.Writer;
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import java.lang.reflect.Field;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.LinkedHashMap;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Map;
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import java.util.TreeMap;
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// The scenario's steps are ignored: the network runs, in real time, for the
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// given milliseconds. Threads make the times vary from run to run; the order
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// of one client's messages does not.
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public class DhcpRun {
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public static void main(String[] args) throws Exception {
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@SuppressWarnings("unchecked")
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Map<String, Object> scenario = (Map<String, Object>) new JsonReader(
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new String(Files.readAllBytes(Paths.get(args[0])), StandardCharsets.UTF_8)).value();
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long duration = Long.parseLong(args[1]);
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Map<String, Knoten> nodes = new LinkedHashMap<>();
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Map<String, Port> ports = new HashMap<>();
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Map<String, String> macByNode = new LinkedHashMap<>();
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for (Object each : list(scenario.get("nodes"))) {
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Map<String, Object> node = map(each);
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String id = (String) node.get("id");
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String kind = (String) node.get("kind");
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List<Object> nodePorts = list(node.get("ports"));
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Knoten knoten;
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switch (kind) {
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case "pc":
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knoten = new Rechner();
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break;
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case "notebook":
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knoten = new Notebook();
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break;
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case "networkSwitch":
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knoten = new Switch();
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break;
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default:
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throw new IllegalArgumentException("node kind " + kind + " is not built by this tool");
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}
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knoten.setName(id);
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if (knoten instanceof InternetKnoten) {
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if (nodePorts.size() != 1) throw new IllegalArgumentException("a host has one port here");
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Map<String, Object> port = map(nodePorts.get(0));
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NetzwerkInterface nic = ((InternetKnoten) knoten).getNetzwerkInterfaces().get(0);
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String mac = port.containsKey("mac") ? (String) port.get("mac") : stableMac((String) port.get("id"));
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nic.setMac(mac);
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ports.put((String) port.get("id"), nic.getPort());
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macByNode.put(id, mac);
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} else {
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LinkedList<Port> switchPorts = ((LokalerKnoten) knoten).getAnschluesse();
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for (int index = 0; index < nodePorts.size(); index++) {
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ports.put((String) map(nodePorts.get(index)).get("id"), switchPorts.get(index));
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}
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}
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nodes.put(id, knoten);
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}
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for (Map.Entry<String, Object> entry : map(scenario.getOrDefault("devices", new HashMap<>())).entrySet()) {
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Map<String, Object> device = map(entry.getValue());
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NetzwerkInterface nic = ((InternetKnoten) nodes.get(entry.getKey())).getNetzwerkInterfaces().get(0);
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nic.setIp((String) device.get("ip"));
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nic.setSubnetzMaske((String) device.get("mask"));
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nic.setGateway((String) device.getOrDefault("gateway", ""));
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nic.setDns((String) device.getOrDefault("dns", ""));
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}
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for (Object each : list(scenario.get("links"))) {
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Map<String, Object> link = map(each);
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Kabel cable = new Kabel();
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cable.setAnschluesse(new Port[] { ports.get(link.get("sourcePort")), ports.get(link.get("targetPort")) });
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}
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List<String> servers = new ArrayList<>();
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for (Map.Entry<String, Object> entry : map(scenario.getOrDefault("dhcpServers", new HashMap<>())).entrySet()) {
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Map<String, Object> config = map(entry.getValue());
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DHCPServer server = system(nodes.get(entry.getKey())).getDHCPServer();
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server.setUntergrenze((String) config.getOrDefault("lower", "0.0.0.0"));
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server.setObergrenze((String) config.getOrDefault("upper", "0.0.0.0"));
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server.setGatewayip((String) config.getOrDefault("gateway", "0.0.0.0"));
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server.setDnsserverip((String) config.getOrDefault("dns", "0.0.0.0"));
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server.setOwnSettings(Boolean.TRUE.equals(config.get("own")));
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for (Object assignment : list(config.getOrDefault("staticAssignments", new ArrayList<>()))) {
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server.addStaticAssignment((String) list(assignment).get(0), (String) list(assignment).get(1));
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}
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server.setAktiv(Boolean.TRUE.equals(config.get("active")));
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servers.add(entry.getKey());
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}
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for (Object each : list(scenario.getOrDefault("dhcpClients", new ArrayList<>()))) {
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system(nodes.get((String) each)).setDHCPKonfiguration(true);
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}
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// Switches and DHCP servers first: FILIUS' client waits for every active
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// server to have started (waitUntilDhcpServerStarted, through the GUI's
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// node list, which this tool has not got).
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// FILIUS' window exists before a simulation starts; created lazily and
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// unsynchronized, the first clients to ask for it would race.
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GUIContainer.getGUIContainer();
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long start = System.currentTimeMillis();
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for (Map.Entry<String, Knoten> entry : nodes.entrySet()) {
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if (entry.getValue() instanceof Switch || servers.contains(entry.getKey())) entry.getValue().getSystemSoftware().starten();
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}
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Thread.sleep(200);
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for (Map.Entry<String, Knoten> entry : nodes.entrySet()) {
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if (!(entry.getValue() instanceof Switch || servers.contains(entry.getKey()))) entry.getValue().getSystemSoftware().starten();
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}
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Thread.sleep(duration);
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Field field = Lauscher.class.getDeclaredField("datenEinheiten");
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field.setAccessible(true);
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@SuppressWarnings("unchecked")
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Map<String, LinkedList<Object[]>> log = (Map<String, LinkedList<Object[]>>) field.get(Lauscher.getLauscher());
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Json out = new Json();
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ScenarioNetwork network = ScenarioNetwork.read(args[0]);
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network.start();
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Thread.sleep(Long.parseLong(args[1]));
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ScenarioNetwork.Json out = new ScenarioNetwork.Json();
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out.open('{');
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out.key("frames").open('{');
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for (Map.Entry<String, String> entry : macByNode.entrySet()) {
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out.key(entry.getKey()).open('[');
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LinkedList<Object[]> frames = log.get(entry.getValue());
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if (frames != null) {
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synchronized (frames) {
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for (Object[] stamped : frames) frame(out, ((Long) stamped[0]) - start, (EthernetFrame) stamped[1]);
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}
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}
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out.close(']');
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}
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network.writeFrames(out);
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network.writeDevices(out);
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out.close('}');
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out.key("devices").open('{');
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for (Map.Entry<String, Knoten> entry : nodes.entrySet()) {
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if (!(entry.getValue() instanceof InternetKnoten)) continue;
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NetzwerkInterface nic = ((InternetKnoten) entry.getValue()).getNetzwerkInterfaces().get(0);
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out.key(entry.getKey()).open('[').string(nic.getIp()).string(nic.getSubnetzMaske()).string(nic.getGateway())
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.string(nic.getDns()).close(']');
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}
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out.close('}');
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out.close('}');
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for (Knoten knoten : nodes.values()) {
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try {
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knoten.getSystemSoftware().beenden();
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} catch (Exception e) {}
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}
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try (Writer writer = new OutputStreamWriter(new FileOutputStream(args[2]), StandardCharsets.UTF_8)) {
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writer.write(out.toString());
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writer.write('\n');
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}
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network.stop();
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ScenarioNetwork.write(args[2], out);
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System.exit(0);
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}
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private static void frame(Json out, long time, EthernetFrame frame) {
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out.open('{').key("time").number(time).key("source").string(frame.getQuellMacAdresse()).key("destination")
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.string(frame.getZielMacAdresse());
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Object data = frame.getDaten();
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if (data instanceof ArpPaket) {
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ArpPaket arp = (ArpPaket) data;
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out.key("arp").number(arp.getOperation()).key("senderIp").string(arp.getSenderIP()).key("targetIp")
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.string(arp.getTargetIP());
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} else if (data instanceof IcmpPaket) {
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out.key("icmp").number(((IcmpPaket) data).getIcmpType());
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} else if (data instanceof IpPaket) {
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IpPaket ip = (IpPaket) data;
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Segment segment = ip.getSegment();
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out.key("sourceIp").string(ip.getSender()).key("destinationIp").string(ip.getEmpfaenger()).key("protocol")
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.number(ip.getProtocol()).key("sourcePort").number(segment.getQuellPort()).key("destinationPort")
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.number(segment.getZielPort()).key("payload").string(segment.getDaten());
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}
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out.close('}');
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}
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private static InternetKnotenBetriebssystem system(Knoten knoten) {
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return (InternetKnotenBetriebssystem) knoten.getSystemSoftware();
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}
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/** The core's stableGeneratedMacAddress (packages/core/src/model/node.ts). */
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static String stableMac(String portId) {
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String compact = portId.toUpperCase().replace("-", "");
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String suffix = compact.substring(compact.length() - 10);
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StringBuilder mac = new StringBuilder("02");
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for (int offset = 0; offset < suffix.length(); offset += 2) mac.append(':').append(suffix, offset, offset + 2);
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return mac.toString();
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}
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@SuppressWarnings("unchecked")
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private static Map<String, Object> map(Object value) {
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return (Map<String, Object>) value;
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}
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@SuppressWarnings("unchecked")
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private static List<Object> list(Object value) {
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return (List<Object>) value;
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}
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/** Just enough JSON for a scenario: objects, arrays, strings, numbers, booleans, null. */
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static final class JsonReader {
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private final String text;
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private int position;
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JsonReader(String text) {
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this.text = text;
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}
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Object value() {
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skip();
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char c = text.charAt(position);
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if (c == '{') {
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Map<String, Object> result = new TreeMap<>();
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position++;
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skip();
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if (text.charAt(position) == '}') {
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position++;
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return result;
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}
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for (;;) {
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skip();
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String key = (String) value();
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skip();
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expect(':');
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result.put(key, value());
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skip();
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if (text.charAt(position++) == '}') return result;
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}
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}
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if (c == '[') {
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List<Object> result = new ArrayList<>();
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position++;
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skip();
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if (text.charAt(position) == ']') {
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position++;
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return result;
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}
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for (;;) {
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result.add(value());
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skip();
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if (text.charAt(position++) == ']') return result;
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}
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}
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if (c == '"') {
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StringBuilder result = new StringBuilder();
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position++;
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for (char each = text.charAt(position++); each != '"'; each = text.charAt(position++)) {
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if (each == '\\') {
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char escaped = text.charAt(position++);
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switch (escaped) {
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case 'n':
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result.append('\n');
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break;
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case 't':
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result.append('\t');
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break;
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case 'u':
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result.append((char) Integer.parseInt(text.substring(position, position + 4), 16));
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position += 4;
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break;
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default:
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result.append(escaped);
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}
|
||||
} else {
|
||||
result.append(each);
|
||||
}
|
||||
}
|
||||
return result.toString();
|
||||
}
|
||||
if (text.startsWith("true", position)) {
|
||||
position += 4;
|
||||
return Boolean.TRUE;
|
||||
}
|
||||
if (text.startsWith("false", position)) {
|
||||
position += 5;
|
||||
return Boolean.FALSE;
|
||||
}
|
||||
if (text.startsWith("null", position)) {
|
||||
position += 4;
|
||||
return null;
|
||||
}
|
||||
int begin = position;
|
||||
while (position < text.length() && "+-.eE0123456789".indexOf(text.charAt(position)) >= 0) position++;
|
||||
return Double.parseDouble(text.substring(begin, position));
|
||||
}
|
||||
|
||||
private void skip() {
|
||||
while (position < text.length() && Character.isWhitespace(text.charAt(position))) position++;
|
||||
}
|
||||
|
||||
private void expect(char c) {
|
||||
if (text.charAt(position++) != c) throw new IllegalArgumentException("expected " + c + " at " + (position - 1));
|
||||
}
|
||||
}
|
||||
|
||||
/** A JSON writer with commas and indentation. */
|
||||
static final class Json {
|
||||
private final StringBuilder text = new StringBuilder();
|
||||
private final LinkedList<Boolean> first = new LinkedList<>();
|
||||
private boolean afterKey;
|
||||
|
||||
private void separate() {
|
||||
if (afterKey) {
|
||||
afterKey = false;
|
||||
return;
|
||||
}
|
||||
if (first.isEmpty()) return;
|
||||
if (!first.peek()) text.append(',');
|
||||
first.pop();
|
||||
first.push(false);
|
||||
text.append('\n');
|
||||
for (int i = 0; i < first.size(); i++) text.append(" ");
|
||||
}
|
||||
|
||||
Json open(char bracket) {
|
||||
separate();
|
||||
text.append(bracket);
|
||||
first.push(true);
|
||||
return this;
|
||||
}
|
||||
|
||||
Json close(char bracket) {
|
||||
boolean empty = first.pop();
|
||||
if (!empty) {
|
||||
text.append('\n');
|
||||
for (int i = 0; i < first.size(); i++) text.append(" ");
|
||||
}
|
||||
text.append(bracket);
|
||||
return this;
|
||||
}
|
||||
|
||||
Json key(String key) {
|
||||
separate();
|
||||
quote(key);
|
||||
text.append(": ");
|
||||
afterKey = true;
|
||||
return this;
|
||||
}
|
||||
|
||||
Json string(String value) {
|
||||
separate();
|
||||
if (value == null) text.append("null");
|
||||
else quote(value);
|
||||
return this;
|
||||
}
|
||||
|
||||
Json number(long value) {
|
||||
separate();
|
||||
text.append(value);
|
||||
return this;
|
||||
}
|
||||
|
||||
private void quote(String value) {
|
||||
text.append('"');
|
||||
for (char c : value.toCharArray()) {
|
||||
if (c == '"' || c == '\\') text.append('\\').append(c);
|
||||
else if (c == '\n') text.append("\\n");
|
||||
else if (c < 0x20) text.append(String.format("\\u%04x", (int) c));
|
||||
else text.append(c);
|
||||
}
|
||||
text.append('"');
|
||||
}
|
||||
|
||||
@Override
|
||||
public String toString() {
|
||||
return text.toString();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@@ -0,0 +1,418 @@
|
||||
// A core scenario's network (packages/core/test/scenarios/*.scenario.json:
|
||||
// nodes, links, devices, dhcpServers, dhcpClients) built in Java FILIUS the
|
||||
// way the core reads it: a port's MAC is its `mac`, else the core's
|
||||
// stableGeneratedMacAddress. Started as the action mode starts it (every
|
||||
// system software's starten()); afterwards every frame each network card saw
|
||||
// (FILIUS' own packet log, the Lauscher) and each host's addresses. Shared by
|
||||
// DhcpRun and TcpRun.
|
||||
|
||||
import filius.gui.GUIContainer;
|
||||
import filius.hardware.Kabel;
|
||||
import filius.hardware.NetzwerkInterface;
|
||||
import filius.hardware.Port;
|
||||
import filius.hardware.knoten.InternetKnoten;
|
||||
import filius.hardware.knoten.Knoten;
|
||||
import filius.hardware.knoten.LokalerKnoten;
|
||||
import filius.hardware.knoten.Notebook;
|
||||
import filius.hardware.knoten.Rechner;
|
||||
import filius.hardware.knoten.Switch;
|
||||
import filius.rahmenprogramm.nachrichten.Lauscher;
|
||||
import filius.software.dhcp.DHCPServer;
|
||||
import filius.software.netzzugangsschicht.EthernetFrame;
|
||||
import filius.software.system.InternetKnotenBetriebssystem;
|
||||
import filius.software.transportschicht.Segment;
|
||||
import filius.software.transportschicht.TcpSegment;
|
||||
import filius.software.vermittlungsschicht.ArpPaket;
|
||||
import filius.software.vermittlungsschicht.IcmpPaket;
|
||||
import filius.software.vermittlungsschicht.IpPaket;
|
||||
|
||||
import java.io.FileOutputStream;
|
||||
import java.io.OutputStreamWriter;
|
||||
import java.io.Writer;
|
||||
import java.lang.reflect.Field;
|
||||
import java.nio.charset.StandardCharsets;
|
||||
import java.nio.file.Files;
|
||||
import java.nio.file.Paths;
|
||||
import java.util.ArrayList;
|
||||
import java.util.HashMap;
|
||||
import java.util.LinkedHashMap;
|
||||
import java.util.LinkedList;
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
import java.util.TreeMap;
|
||||
|
||||
public class ScenarioNetwork {
|
||||
final Map<String, Knoten> nodes = new LinkedHashMap<>();
|
||||
final Map<String, String> macByNode = new LinkedHashMap<>();
|
||||
final List<String> servers = new ArrayList<>();
|
||||
long start;
|
||||
|
||||
@SuppressWarnings("unchecked")
|
||||
static ScenarioNetwork read(String path) throws Exception {
|
||||
Map<String, Object> scenario = (Map<String, Object>) new JsonReader(
|
||||
new String(Files.readAllBytes(Paths.get(path)), StandardCharsets.UTF_8)).value();
|
||||
ScenarioNetwork network = new ScenarioNetwork();
|
||||
network.build(scenario);
|
||||
return network;
|
||||
}
|
||||
|
||||
private void build(Map<String, Object> scenario) {
|
||||
Map<String, Port> ports = new HashMap<>();
|
||||
for (Object each : list(scenario.get("nodes"))) {
|
||||
Map<String, Object> node = map(each);
|
||||
String id = (String) node.get("id");
|
||||
String kind = (String) node.get("kind");
|
||||
List<Object> nodePorts = list(node.get("ports"));
|
||||
Knoten knoten;
|
||||
switch (kind) {
|
||||
case "pc":
|
||||
knoten = new Rechner();
|
||||
break;
|
||||
case "notebook":
|
||||
knoten = new Notebook();
|
||||
break;
|
||||
case "networkSwitch":
|
||||
knoten = new Switch();
|
||||
break;
|
||||
default:
|
||||
throw new IllegalArgumentException("node kind " + kind + " is not built by this tool");
|
||||
}
|
||||
knoten.setName(id);
|
||||
if (knoten instanceof InternetKnoten) {
|
||||
if (nodePorts.size() != 1) throw new IllegalArgumentException("a host has one port here");
|
||||
Map<String, Object> port = map(nodePorts.get(0));
|
||||
NetzwerkInterface nic = ((InternetKnoten) knoten).getNetzwerkInterfaces().get(0);
|
||||
String mac = port.containsKey("mac") ? (String) port.get("mac") : stableMac((String) port.get("id"));
|
||||
nic.setMac(mac);
|
||||
ports.put((String) port.get("id"), nic.getPort());
|
||||
macByNode.put(id, mac);
|
||||
} else {
|
||||
LinkedList<Port> switchPorts = ((LokalerKnoten) knoten).getAnschluesse();
|
||||
for (int index = 0; index < nodePorts.size(); index++) {
|
||||
ports.put((String) map(nodePorts.get(index)).get("id"), switchPorts.get(index));
|
||||
}
|
||||
}
|
||||
nodes.put(id, knoten);
|
||||
}
|
||||
for (Map.Entry<String, Object> entry : map(scenario.getOrDefault("devices", new HashMap<>())).entrySet()) {
|
||||
Map<String, Object> device = map(entry.getValue());
|
||||
NetzwerkInterface nic = ((InternetKnoten) nodes.get(entry.getKey())).getNetzwerkInterfaces().get(0);
|
||||
nic.setIp((String) device.get("ip"));
|
||||
nic.setSubnetzMaske((String) device.get("mask"));
|
||||
nic.setGateway((String) device.getOrDefault("gateway", ""));
|
||||
nic.setDns((String) device.getOrDefault("dns", ""));
|
||||
}
|
||||
for (Object each : list(scenario.get("links"))) {
|
||||
Map<String, Object> link = map(each);
|
||||
Kabel cable = new Kabel();
|
||||
cable.setAnschluesse(new Port[] { ports.get(link.get("sourcePort")), ports.get(link.get("targetPort")) });
|
||||
}
|
||||
for (Map.Entry<String, Object> entry : map(scenario.getOrDefault("dhcpServers", new HashMap<>())).entrySet()) {
|
||||
Map<String, Object> config = map(entry.getValue());
|
||||
DHCPServer server = system(nodes.get(entry.getKey())).getDHCPServer();
|
||||
server.setUntergrenze((String) config.getOrDefault("lower", "0.0.0.0"));
|
||||
server.setObergrenze((String) config.getOrDefault("upper", "0.0.0.0"));
|
||||
server.setGatewayip((String) config.getOrDefault("gateway", "0.0.0.0"));
|
||||
server.setDnsserverip((String) config.getOrDefault("dns", "0.0.0.0"));
|
||||
server.setOwnSettings(Boolean.TRUE.equals(config.get("own")));
|
||||
for (Object assignment : list(config.getOrDefault("staticAssignments", new ArrayList<>()))) {
|
||||
server.addStaticAssignment((String) list(assignment).get(0), (String) list(assignment).get(1));
|
||||
}
|
||||
server.setAktiv(Boolean.TRUE.equals(config.get("active")));
|
||||
servers.add(entry.getKey());
|
||||
}
|
||||
for (Object each : list(scenario.getOrDefault("dhcpClients", new ArrayList<>()))) {
|
||||
system(nodes.get((String) each)).setDHCPKonfiguration(true);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/** Starts the simulation; times in the log count from here. */
|
||||
void start() throws InterruptedException {
|
||||
// Switches and DHCP servers first: FILIUS' client waits for every active
|
||||
// server to have started (waitUntilDhcpServerStarted, through the GUI's
|
||||
// node list, which this tool has not got).
|
||||
// FILIUS' window exists before a simulation starts; created lazily and
|
||||
// unsynchronized, the first clients to ask for it would race.
|
||||
GUIContainer.getGUIContainer();
|
||||
start = System.currentTimeMillis();
|
||||
for (Map.Entry<String, Knoten> entry : nodes.entrySet()) {
|
||||
if (entry.getValue() instanceof Switch || servers.contains(entry.getKey())) entry.getValue().getSystemSoftware().starten();
|
||||
}
|
||||
Thread.sleep(200);
|
||||
for (Map.Entry<String, Knoten> entry : nodes.entrySet()) {
|
||||
if (!(entry.getValue() instanceof Switch || servers.contains(entry.getKey()))) entry.getValue().getSystemSoftware().starten();
|
||||
}
|
||||
}
|
||||
|
||||
InternetKnotenBetriebssystem system(String nodeId) {
|
||||
return (InternetKnotenBetriebssystem) nodes.get(nodeId).getSystemSoftware();
|
||||
}
|
||||
|
||||
/** Every frame each host's card saw, by node. */
|
||||
void writeFrames(Json out) throws Exception {
|
||||
Field field = Lauscher.class.getDeclaredField("datenEinheiten");
|
||||
field.setAccessible(true);
|
||||
@SuppressWarnings("unchecked")
|
||||
Map<String, LinkedList<Object[]>> log = (Map<String, LinkedList<Object[]>>) field.get(Lauscher.getLauscher());
|
||||
out.key("frames").open('{');
|
||||
for (Map.Entry<String, String> entry : macByNode.entrySet()) {
|
||||
out.key(entry.getKey()).open('[');
|
||||
LinkedList<Object[]> frames = log.get(entry.getValue());
|
||||
if (frames != null) {
|
||||
synchronized (frames) {
|
||||
for (Object[] stamped : frames) frame(out, ((Long) stamped[0]) - start, (EthernetFrame) stamped[1]);
|
||||
}
|
||||
}
|
||||
out.close(']');
|
||||
}
|
||||
out.close('}');
|
||||
}
|
||||
|
||||
/** Each host's address, mask, gateway and DNS server. */
|
||||
void writeDevices(Json out) {
|
||||
out.key("devices").open('{');
|
||||
for (Map.Entry<String, Knoten> entry : nodes.entrySet()) {
|
||||
if (!(entry.getValue() instanceof InternetKnoten)) continue;
|
||||
NetzwerkInterface nic = ((InternetKnoten) entry.getValue()).getNetzwerkInterfaces().get(0);
|
||||
out.key(entry.getKey()).open('[').string(nic.getIp()).string(nic.getSubnetzMaske()).string(nic.getGateway())
|
||||
.string(nic.getDns()).close(']');
|
||||
}
|
||||
out.close('}');
|
||||
}
|
||||
|
||||
void stop() {
|
||||
for (Knoten knoten : nodes.values()) {
|
||||
try {
|
||||
knoten.getSystemSoftware().beenden();
|
||||
} catch (Exception e) {}
|
||||
}
|
||||
}
|
||||
|
||||
static void write(String path, Json out) throws Exception {
|
||||
try (Writer writer = new OutputStreamWriter(new FileOutputStream(path), StandardCharsets.UTF_8)) {
|
||||
writer.write(out.toString());
|
||||
writer.write('\n');
|
||||
}
|
||||
}
|
||||
|
||||
private static void frame(Json out, long time, EthernetFrame frame) {
|
||||
out.open('{').key("time").number(time).key("source").string(frame.getQuellMacAdresse()).key("destination")
|
||||
.string(frame.getZielMacAdresse());
|
||||
Object data = frame.getDaten();
|
||||
if (data instanceof ArpPaket) {
|
||||
ArpPaket arp = (ArpPaket) data;
|
||||
out.key("arp").number(arp.getOperation()).key("senderIp").string(arp.getSenderIP()).key("targetIp")
|
||||
.string(arp.getTargetIP());
|
||||
} else if (data instanceof IcmpPaket) {
|
||||
out.key("icmp").number(((IcmpPaket) data).getIcmpType());
|
||||
} else if (data instanceof IpPaket) {
|
||||
IpPaket ip = (IpPaket) data;
|
||||
Segment segment = ip.getSegment();
|
||||
out.key("sourceIp").string(ip.getSender()).key("destinationIp").string(ip.getEmpfaenger()).key("protocol")
|
||||
.number(ip.getProtocol()).key("sourcePort").number(segment.getQuellPort()).key("destinationPort")
|
||||
.number(segment.getZielPort()).key("payload").string(segment.getDaten());
|
||||
if (segment instanceof TcpSegment) {
|
||||
TcpSegment tcp = (TcpSegment) segment;
|
||||
String flags = (tcp.isSyn() ? "S" : "") + (tcp.isAck() ? "A" : "") + (tcp.isFin() ? "F" : "")
|
||||
+ (tcp.isPush() ? "P" : "") + (tcp.isRst() ? "R" : "");
|
||||
out.key("tcpFlags").string(flags).key("sequence").number(tcp.getSeqNummer()).key("acknowledgement")
|
||||
.number(tcp.getAckNummer());
|
||||
}
|
||||
}
|
||||
out.close('}');
|
||||
}
|
||||
|
||||
private static InternetKnotenBetriebssystem system(Knoten knoten) {
|
||||
return (InternetKnotenBetriebssystem) knoten.getSystemSoftware();
|
||||
}
|
||||
|
||||
/** The core's stableGeneratedMacAddress (packages/core/src/model/node.ts). */
|
||||
static String stableMac(String portId) {
|
||||
String compact = portId.toUpperCase().replace("-", "");
|
||||
String suffix = compact.substring(compact.length() - 10);
|
||||
StringBuilder mac = new StringBuilder("02");
|
||||
for (int offset = 0; offset < suffix.length(); offset += 2) mac.append(':').append(suffix, offset, offset + 2);
|
||||
return mac.toString();
|
||||
}
|
||||
|
||||
@SuppressWarnings("unchecked")
|
||||
private static Map<String, Object> map(Object value) {
|
||||
return (Map<String, Object>) value;
|
||||
}
|
||||
|
||||
@SuppressWarnings("unchecked")
|
||||
private static List<Object> list(Object value) {
|
||||
return (List<Object>) value;
|
||||
}
|
||||
|
||||
/** Just enough JSON for a scenario: objects, arrays, strings, numbers, booleans, null. */
|
||||
static final class JsonReader {
|
||||
private final String text;
|
||||
private int position;
|
||||
|
||||
JsonReader(String text) {
|
||||
this.text = text;
|
||||
}
|
||||
|
||||
Object value() {
|
||||
skip();
|
||||
char c = text.charAt(position);
|
||||
if (c == '{') {
|
||||
Map<String, Object> result = new TreeMap<>();
|
||||
position++;
|
||||
skip();
|
||||
if (text.charAt(position) == '}') {
|
||||
position++;
|
||||
return result;
|
||||
}
|
||||
for (;;) {
|
||||
skip();
|
||||
String key = (String) value();
|
||||
skip();
|
||||
expect(':');
|
||||
result.put(key, value());
|
||||
skip();
|
||||
if (text.charAt(position++) == '}') return result;
|
||||
}
|
||||
}
|
||||
if (c == '[') {
|
||||
List<Object> result = new ArrayList<>();
|
||||
position++;
|
||||
skip();
|
||||
if (text.charAt(position) == ']') {
|
||||
position++;
|
||||
return result;
|
||||
}
|
||||
for (;;) {
|
||||
result.add(value());
|
||||
skip();
|
||||
if (text.charAt(position++) == ']') return result;
|
||||
}
|
||||
}
|
||||
if (c == '"') {
|
||||
StringBuilder result = new StringBuilder();
|
||||
position++;
|
||||
for (char each = text.charAt(position++); each != '"'; each = text.charAt(position++)) {
|
||||
if (each == '\\') {
|
||||
char escaped = text.charAt(position++);
|
||||
switch (escaped) {
|
||||
case 'n':
|
||||
result.append('\n');
|
||||
break;
|
||||
case 't':
|
||||
result.append('\t');
|
||||
break;
|
||||
case 'u':
|
||||
result.append((char) Integer.parseInt(text.substring(position, position + 4), 16));
|
||||
position += 4;
|
||||
break;
|
||||
default:
|
||||
result.append(escaped);
|
||||
}
|
||||
} else {
|
||||
result.append(each);
|
||||
}
|
||||
}
|
||||
return result.toString();
|
||||
}
|
||||
if (text.startsWith("true", position)) {
|
||||
position += 4;
|
||||
return Boolean.TRUE;
|
||||
}
|
||||
if (text.startsWith("false", position)) {
|
||||
position += 5;
|
||||
return Boolean.FALSE;
|
||||
}
|
||||
if (text.startsWith("null", position)) {
|
||||
position += 4;
|
||||
return null;
|
||||
}
|
||||
int begin = position;
|
||||
while (position < text.length() && "+-.eE0123456789".indexOf(text.charAt(position)) >= 0) position++;
|
||||
return Double.parseDouble(text.substring(begin, position));
|
||||
}
|
||||
|
||||
private void skip() {
|
||||
while (position < text.length() && Character.isWhitespace(text.charAt(position))) position++;
|
||||
}
|
||||
|
||||
private void expect(char c) {
|
||||
if (text.charAt(position++) != c) throw new IllegalArgumentException("expected " + c + " at " + (position - 1));
|
||||
}
|
||||
}
|
||||
|
||||
/** A JSON writer with commas and indentation. */
|
||||
static final class Json {
|
||||
private final StringBuilder text = new StringBuilder();
|
||||
private final LinkedList<Boolean> first = new LinkedList<>();
|
||||
private boolean afterKey;
|
||||
|
||||
private void separate() {
|
||||
if (afterKey) {
|
||||
afterKey = false;
|
||||
return;
|
||||
}
|
||||
if (first.isEmpty()) return;
|
||||
if (!first.peek()) text.append(',');
|
||||
first.pop();
|
||||
first.push(false);
|
||||
text.append('\n');
|
||||
for (int i = 0; i < first.size(); i++) text.append(" ");
|
||||
}
|
||||
|
||||
Json open(char bracket) {
|
||||
separate();
|
||||
text.append(bracket);
|
||||
first.push(true);
|
||||
return this;
|
||||
}
|
||||
|
||||
Json close(char bracket) {
|
||||
boolean empty = first.pop();
|
||||
if (!empty) {
|
||||
text.append('\n');
|
||||
for (int i = 0; i < first.size(); i++) text.append(" ");
|
||||
}
|
||||
text.append(bracket);
|
||||
return this;
|
||||
}
|
||||
|
||||
Json key(String key) {
|
||||
separate();
|
||||
quote(key);
|
||||
text.append(": ");
|
||||
afterKey = true;
|
||||
return this;
|
||||
}
|
||||
|
||||
Json string(String value) {
|
||||
separate();
|
||||
if (value == null) text.append("null");
|
||||
else quote(value);
|
||||
return this;
|
||||
}
|
||||
|
||||
Json number(long value) {
|
||||
separate();
|
||||
text.append(value);
|
||||
return this;
|
||||
}
|
||||
|
||||
private void quote(String value) {
|
||||
text.append('"');
|
||||
for (char c : value.toCharArray()) {
|
||||
if (c == '"' || c == '\\') text.append('\\').append(c);
|
||||
else if (c == '\n') text.append("\\n");
|
||||
else if (c < 0x20) text.append(String.format("\\u%04x", (int) c));
|
||||
else text.append(c);
|
||||
}
|
||||
text.append('"');
|
||||
}
|
||||
|
||||
@Override
|
||||
public String toString() {
|
||||
return text.toString();
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,213 @@
|
||||
// Runs a story of TCP calls on a core scenario's network in Java FILIUS
|
||||
// (ScenarioNetwork) and records what really happens: every frame each card
|
||||
// saw, when each call started, returned or failed, and every state each
|
||||
// socket went through (polled every few milliseconds).
|
||||
//
|
||||
// TcpRun <scenario.json> <story> <milliseconds> <out.json>
|
||||
//
|
||||
// The stories use the network of tcp-lan (server 192.168.0.10, clients
|
||||
// 192.168.0.20 and .30) and run the calls as FILIUS' applications do, the
|
||||
// server's in a thread of its own:
|
||||
// exchange the client connects to port 80, sends "GET /", the server
|
||||
// answers with 3000 x (three segments); the client closes,
|
||||
// the server closes a second after it saw CLOSE_WAIT
|
||||
// closedPort a client connects to port 81, where nothing listens
|
||||
// lostData connected, all frames are lost (Verbindung.setDrop) while
|
||||
// the client sends; loss ends when senden fails
|
||||
|
||||
import filius.hardware.Verbindung;
|
||||
import filius.software.transportschicht.ServerSocket;
|
||||
import filius.software.transportschicht.Socket;
|
||||
import filius.software.transportschicht.TCPSocket;
|
||||
import filius.software.vermittlungsschicht.IpPaket;
|
||||
|
||||
import java.util.ArrayList;
|
||||
import java.util.LinkedHashMap;
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
|
||||
public class TcpRun {
|
||||
static final String SERVER = "00000000-0000-0000-0000-000000000101";
|
||||
static final String CLIENT = "00000000-0000-0000-0000-000000000102";
|
||||
static final String OTHER_CLIENT = "00000000-0000-0000-0000-000000000103";
|
||||
|
||||
static ScenarioNetwork network;
|
||||
static final List<Object[]> events = new ArrayList<>();
|
||||
static final Map<String, List<Object[]>> states = new LinkedHashMap<>();
|
||||
static final Map<String, TCPSocket> watched = new LinkedHashMap<>();
|
||||
|
||||
static synchronized void event(String what) {
|
||||
events.add(new Object[] { System.currentTimeMillis() - network.start, what });
|
||||
}
|
||||
|
||||
static synchronized void watch(String label, Socket socket) {
|
||||
watched.put(label, (TCPSocket) socket);
|
||||
states.put(label, new ArrayList<>());
|
||||
poll();
|
||||
}
|
||||
|
||||
static synchronized void poll() {
|
||||
for (Map.Entry<String, TCPSocket> entry : watched.entrySet()) {
|
||||
List<Object[]> seen = states.get(entry.getKey());
|
||||
String state = entry.getValue().getStateAsString();
|
||||
if (seen.isEmpty() || !seen.get(seen.size() - 1)[1].equals(state)) {
|
||||
seen.add(new Object[] { System.currentTimeMillis() - network.start, state });
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
interface Call {
|
||||
Object run() throws Exception;
|
||||
}
|
||||
|
||||
/** A call with its start and its end (result or exception) in the events. */
|
||||
static Object call(String label, Call call) {
|
||||
event(label + " called");
|
||||
try {
|
||||
Object result = call.run();
|
||||
event(label + " returned" + (result instanceof String ? " " + ((String) result).length() + " characters" : ""));
|
||||
return result;
|
||||
} catch (Exception e) {
|
||||
event(label + " failed " + e.getClass().getSimpleName());
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
static Thread server(Call body) {
|
||||
Thread thread = new Thread(() -> {
|
||||
try {
|
||||
body.run();
|
||||
} catch (Exception e) {
|
||||
event("server failed " + e.getClass().getSimpleName());
|
||||
}
|
||||
});
|
||||
thread.start();
|
||||
return thread;
|
||||
}
|
||||
|
||||
static String repeat(String text, int count) {
|
||||
StringBuilder result = new StringBuilder();
|
||||
for (int i = 0; i < count; i++) result.append(text);
|
||||
return result.toString();
|
||||
}
|
||||
|
||||
public static void main(String[] args) throws Exception {
|
||||
network = ScenarioNetwork.read(args[0]);
|
||||
String story = args[1];
|
||||
long duration = Long.parseLong(args[2]);
|
||||
network.start();
|
||||
Thread poller = new Thread(() -> {
|
||||
while (true) {
|
||||
poll();
|
||||
try {
|
||||
Thread.sleep(2);
|
||||
} catch (InterruptedException e) {
|
||||
return;
|
||||
}
|
||||
}
|
||||
});
|
||||
poller.setDaemon(true);
|
||||
poller.start();
|
||||
long end = network.start + duration;
|
||||
|
||||
switch (story) {
|
||||
case "exchange": {
|
||||
server(() -> {
|
||||
ServerSocket listener = new ServerSocket(network.system(SERVER), 80, IpPaket.TCP, new ArrayList<>());
|
||||
Socket accepted = (Socket) call("server oeffnen", listener::oeffnen);
|
||||
watch("server", accepted);
|
||||
call("server empfangen", accepted::empfangen);
|
||||
call("server senden", () -> {
|
||||
accepted.senden(repeat("x", 3000));
|
||||
return null;
|
||||
});
|
||||
while (!((TCPSocket) accepted).getStateAsString().equals("CLOSE_WAIT")) Thread.sleep(2);
|
||||
Thread.sleep(1000);
|
||||
call("server schliessen", () -> {
|
||||
accepted.schliessen();
|
||||
return null;
|
||||
});
|
||||
return null;
|
||||
});
|
||||
Thread.sleep(500);
|
||||
TCPSocket client = new TCPSocket(network.system(CLIENT), "192.168.0.10", 80);
|
||||
watch("client", client);
|
||||
call("client verbinden", () -> {
|
||||
client.verbinden();
|
||||
return null;
|
||||
});
|
||||
call("client senden", () -> {
|
||||
client.senden("GET /");
|
||||
return null;
|
||||
});
|
||||
call("client empfangen", client::empfangen);
|
||||
call("client schliessen", () -> {
|
||||
client.schliessen();
|
||||
return null;
|
||||
});
|
||||
break;
|
||||
}
|
||||
case "closedPort": {
|
||||
Thread.sleep(500);
|
||||
TCPSocket client = new TCPSocket(network.system(OTHER_CLIENT), "192.168.0.10", 81);
|
||||
watch("client", client);
|
||||
call("client verbinden", () -> {
|
||||
client.verbinden();
|
||||
return null;
|
||||
});
|
||||
break;
|
||||
}
|
||||
case "lostData": {
|
||||
server(() -> {
|
||||
ServerSocket listener = new ServerSocket(network.system(SERVER), 80, IpPaket.TCP, new ArrayList<>());
|
||||
Socket accepted = (Socket) call("server oeffnen", listener::oeffnen);
|
||||
watch("server", accepted);
|
||||
return null;
|
||||
});
|
||||
Thread.sleep(500);
|
||||
TCPSocket client = new TCPSocket(network.system(CLIENT), "192.168.0.10", 80);
|
||||
watch("client", client);
|
||||
call("client verbinden", () -> {
|
||||
client.verbinden();
|
||||
return null;
|
||||
});
|
||||
Thread.sleep(500);
|
||||
event("loss on");
|
||||
Verbindung.setDrop(true);
|
||||
call("client senden", () -> {
|
||||
client.senden("verloren");
|
||||
return null;
|
||||
});
|
||||
Verbindung.setDrop(false);
|
||||
event("loss off");
|
||||
break;
|
||||
}
|
||||
default:
|
||||
throw new IllegalArgumentException("unknown story " + story);
|
||||
}
|
||||
|
||||
long rest = end - System.currentTimeMillis();
|
||||
if (rest > 0) Thread.sleep(rest);
|
||||
poll();
|
||||
|
||||
ScenarioNetwork.Json out = new ScenarioNetwork.Json();
|
||||
out.open('{');
|
||||
network.writeFrames(out);
|
||||
synchronized (TcpRun.class) {
|
||||
out.key("events").open('[');
|
||||
for (Object[] each : events) out.open('[').number((Long) each[0]).string((String) each[1]).close(']');
|
||||
out.close(']');
|
||||
out.key("states").open('{');
|
||||
for (Map.Entry<String, List<Object[]>> entry : states.entrySet()) {
|
||||
out.key(entry.getKey()).open('[');
|
||||
for (Object[] each : entry.getValue()) out.open('[').number((Long) each[0]).string((String) each[1]).close(']');
|
||||
out.close(']');
|
||||
}
|
||||
out.close('}');
|
||||
}
|
||||
out.close('}');
|
||||
network.stop();
|
||||
ScenarioNetwork.write(args[3], out);
|
||||
System.exit(0);
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user