1 files changed, 120 insertions, 0 deletions
diff --git a/netwerk/test/unit/test_trr_nat64.js b/netwerk/test/unit/test_trr_nat64.js
new file mode 100644
index 0000000000..0c8caa87ec
--- /dev/null
+++ b/netwerk/test/unit/test_trr_nat64.js
@@ -0,0 +1,120 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const override = Cc["@mozilla.org/network/native-dns-override;1"].getService(
+  Ci.nsINativeDNSResolverOverride
+);
+
+trr_test_setup();
+registerCleanupFunction(async () => {
+  Services.prefs.clearUserPref("network.connectivity-service.nat64-prefix");
+  override.clearOverrides();
+  trr_clear_prefs();
+});
+
+/**
+ * Waits for an observer notification to fire.
+ *
+ * @param {String} topic The notification topic.
+ * @returns {Promise} A promise that fulfills when the notification is fired.
+ */
+function promiseObserverNotification(topic, matchFunc) {
+  return new Promise((resolve, reject) => {
+    Services.obs.addObserver(function observe(subject, topic, data) {
+      let matches = typeof matchFunc != "function" || matchFunc(subject, data);
+      if (!matches) {
+        return;
+      }
+      Services.obs.removeObserver(observe, topic);
+      resolve({ subject, data });
+    }, topic);
+  });
+}
+
+function makeChan(url) {
+  let chan = NetUtil.newChannel({
+    uri: url,
+    loadUsingSystemPrincipal: true,
+  }).QueryInterface(Ci.nsIHttpChannel);
+  return chan;
+}
+
+function channelOpenPromise(chan) {
+  return new Promise(resolve => {
+    function finish(req, buffer) {
+      resolve([req, buffer]);
+    }
+    chan.asyncOpen(new ChannelListener(finish));
+  });
+}
+
+add_task(async function test_add_nat64_prefix_to_trr() {
+  let trrServer = new TRRServer();
+  registerCleanupFunction(async () => {
+    await trrServer.stop();
+  });
+  await trrServer.start();
+  dump(`port = ${trrServer.port}\n`);
+  let chan = makeChan(`https://localhost:${trrServer.port}/test?bla=some`);
+  let [, resp] = await channelOpenPromise(chan);
+  equal(resp, "<h1> 404 Path not found: /test?bla=some</h1>");
+  Services.dns.clearCache(true);
+  override.addIPOverride("ipv4only.arpa", "fe80::9b2b:c000:00aa");
+  Services.prefs.setCharPref(
+    "network.connectivity-service.nat64-prefix",
+    "ae80::3b1b:c343:1133"
+  );
+
+  let topic = "network:connectivity-service:dns-checks-complete";
+  if (mozinfo.socketprocess_networking) {
+    topic += "-from-socket-process";
+  }
+  let notification = promiseObserverNotification(topic);
+  Services.obs.notifyObservers(null, "network:captive-portal-connectivity");
+  await notification;
+
+  Services.prefs.setIntPref("network.trr.mode", 2);
+  Services.prefs.setCharPref(
+    "network.trr.uri",
+    `https://foo.example.com:${trrServer.port}/dns-query`
+  );
+
+  await trrServer.registerDoHAnswers("xyz.foo", "A", {
+    answers: [
+      {
+        name: "xyz.foo",
+        ttl: 55,
+        type: "A",
+        flush: false,
+        data: "1.2.3.4",
+      },
+    ],
+  });
+  let { inRecord } = await new TRRDNSListener("xyz.foo", {
+    expectedSuccess: false,
+  });
+
+  inRecord.QueryInterface(Ci.nsIDNSAddrRecord);
+  Assert.equal(
+    inRecord.getNextAddrAsString(),
+    "1.2.3.4",
+    `Checking that native IPv4 addresses have higher priority.`
+  );
+
+  Assert.equal(
+    inRecord.getNextAddrAsString(),
+    "ae80::3b1b:102:304",
+    `Checking the manually entered NAT64-prefixed address is in the middle.`
+  );
+
+  Assert.equal(
+    inRecord.getNextAddrAsString(),
+    "fe80::9b2b:102:304",
+    `Checking that the NAT64-prefixed address is appended at the back.`
+  );
+
+  await trrServer.stop();
+});