Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 902 insertions, 0 deletions

diff --git a/netwerk/test/unit/test_trr.js b/netwerk/test/unit/test_trr.js
new file mode 100644
index 0000000000..1fcba44f86
--- /dev/null
+++ b/netwerk/test/unit/test_trr.js
@@ -0,0 +1,902 @@
+"use strict";
+
+/* import-globals-from trr_common.js */
+
+const gDefaultPref = Services.prefs.getDefaultBranch("");
+
+SetParentalControlEnabled(false);
+
+function setup() {
+  h2Port = trr_test_setup();
+}
+
+setup();
+registerCleanupFunction(async () => {
+  trr_clear_prefs();
+});
+
+async function waitForConfirmation(expectedResponseIP, confirmationShouldFail) {
+  // Check that the confirmation eventually completes.
+  let count = 100;
+  while (count > 0) {
+    if (count == 50 || count == 10) {
+      // At these two points we do a longer timeout to account for a slow
+      // response on the server side. This is usually a problem on the Android
+      // because of the increased delay between the emulator and host.
+      await new Promise(resolve => do_timeout(100 * (100 / count), resolve));
+    }
+    let { inRecord } = await new TRRDNSListener(
+      `ip${count}.example.org`,
+      undefined,
+      false
+    );
+    inRecord.QueryInterface(Ci.nsIDNSAddrRecord);
+    let responseIP = inRecord.getNextAddrAsString();
+    Assert.ok(true, responseIP);
+    if (responseIP == expectedResponseIP) {
+      break;
+    }
+    count--;
+  }
+
+  if (confirmationShouldFail) {
+    Assert.equal(count, 0, "Confirmation did not finish after 100 iterations");
+    return;
+  }
+
+  Assert.greater(count, 0, "Finished confirmation before 100 iterations");
+}
+
+function setModeAndURI(mode, path) {
+  Services.prefs.setIntPref("network.trr.mode", mode);
+  Services.prefs.setCharPref(
+    "network.trr.uri",
+    `https://${TRR_Domain}:${h2Port}/${path}`
+  );
+}
+
+function makeChan(url, mode, bypassCache) {
+  let chan = NetUtil.newChannel({
+    uri: url,
+    loadUsingSystemPrincipal: true,
+  }).QueryInterface(Ci.nsIHttpChannel);
+  chan.loadFlags |= Ci.nsIRequest.LOAD_BYPASS_CACHE;
+  chan.loadFlags |= Ci.nsIRequest.INHIBIT_CACHING;
+  chan.setTRRMode(mode);
+  return chan;
+}
+
+add_task(async function test_server_up() {
+  // This test checks that moz-http2.js running in node is working.
+  // This should always be the first test in this file (except for setup)
+  // otherwise we may encounter random failures when the http2 server is down.
+
+  await NodeServer.execute("bad_id", `"hello"`)
+    .then(() => ok(false, "expecting to throw"))
+    .catch(e => equal(e.message, "Error: could not find id"));
+});
+
+add_task(async function test_trr_flags() {
+  Services.prefs.setBoolPref("network.trr.fallback-on-zero-response", true);
+
+  let httpserv = new HttpServer();
+  httpserv.registerPathHandler("/", function handler(metadata, response) {
+    let content = "ok";
+    response.setHeader("Content-Length", `${content.length}`);
+    response.bodyOutputStream.write(content, content.length);
+  });
+  httpserv.start(-1);
+
+  const URL = `http://example.com:${httpserv.identity.primaryPort}/`;
+
+  for (let mode of [0, 1, 2, 3, 4, 5]) {
+    setModeAndURI(mode, "doh?responseIP=127.0.0.1");
+    for (let flag of [
+      Ci.nsIRequest.TRR_DEFAULT_MODE,
+      Ci.nsIRequest.TRR_DISABLED_MODE,
+      Ci.nsIRequest.TRR_FIRST_MODE,
+      Ci.nsIRequest.TRR_ONLY_MODE,
+    ]) {
+      Services.dns.clearCache(true);
+      let chan = makeChan(URL, flag);
+      let expectTRR =
+        ([2, 3].includes(mode) && flag != Ci.nsIRequest.TRR_DISABLED_MODE) ||
+        (mode == 0 &&
+          [Ci.nsIRequest.TRR_FIRST_MODE, Ci.nsIRequest.TRR_ONLY_MODE].includes(
+            flag
+          ));
+
+      await new Promise(resolve =>
+        chan.asyncOpen(new ChannelListener(resolve))
+      );
+
+      equal(chan.getTRRMode(), flag);
+      equal(
+        expectTRR,
+        chan.QueryInterface(Ci.nsIHttpChannelInternal).isResolvedByTRR
+      );
+    }
+  }
+
+  await new Promise(resolve => httpserv.stop(resolve));
+  Services.prefs.clearUserPref("network.trr.fallback-on-zero-response");
+});
+
+add_task(test_A_record);
+
+add_task(async function test_push() {
+  info("Verify DOH push");
+  Services.dns.clearCache(true);
+  info("Asking server to push us a record");
+  setModeAndURI(3, "doh?responseIP=5.5.5.5&push=true");
+
+  await new TRRDNSListener("first.example.com", "5.5.5.5");
+
+  // At this point the second host name should've been pushed and we can resolve it using
+  // cache only. Set back the URI to a path that fails.
+  // Don't clear the cache, otherwise we lose the pushed record.
+  setModeAndURI(3, "404");
+
+  await new TRRDNSListener("push.example.org", "2018::2018");
+});
+
+add_task(test_AAAA_records);
+
+add_task(test_RFC1918);
+
+add_task(test_GET_ECS);
+
+add_task(test_timeout_mode3);
+
+add_task(test_trr_retry);
+
+add_task(test_strict_native_fallback);
+
+add_task(test_no_answers_fallback);
+
+add_task(test_404_fallback);
+
+add_task(test_mode_1_and_4);
+
+add_task(test_CNAME);
+
+add_task(test_name_mismatch);
+
+add_task(test_mode_2);
+
+add_task(test_excluded_domains);
+
+add_task(test_captiveportal_canonicalURL);
+
+add_task(test_parentalcontrols);
+
+// TRR-first check that DNS result is used if domain is part of the builtin-excluded-domains pref
+add_task(test_builtin_excluded_domains);
+
+add_task(test_excluded_domains_mode3);
+
+add_task(test25e);
+
+add_task(test_parentalcontrols_mode3);
+
+add_task(test_builtin_excluded_domains_mode3);
+
+add_task(count_cookies);
+
+add_task(test_connection_closed);
+
+add_task(async function test_clearCacheOnURIChange() {
+  info("Check that the TRR cache should be cleared by a pref change.");
+  Services.dns.clearCache(true);
+  Services.prefs.setBoolPref("network.trr.clear-cache-on-pref-change", true);
+  setModeAndURI(2, "doh?responseIP=7.7.7.7");
+
+  await new TRRDNSListener("bar.example.com", "7.7.7.7");
+
+  // The TRR cache should be cleared by this pref change.
+  Services.prefs.setCharPref(
+    "network.trr.uri",
+    `https://localhost:${h2Port}/doh?responseIP=8.8.8.8`
+  );
+
+  await new TRRDNSListener("bar.example.com", "8.8.8.8");
+  Services.prefs.setBoolPref("network.trr.clear-cache-on-pref-change", false);
+});
+
+add_task(async function test_dnsSuffix() {
+  info("Checking that domains matching dns suffix list use Do53");
+  async function checkDnsSuffixInMode(mode) {
+    Services.dns.clearCache(true);
+    setModeAndURI(mode, "doh?responseIP=1.2.3.4&push=true");
+    await new TRRDNSListener("example.org", "1.2.3.4");
+    await new TRRDNSListener("push.example.org", "2018::2018");
+    await new TRRDNSListener("test.com", "1.2.3.4");
+
+    let networkLinkService = {
+      dnsSuffixList: ["example.org"],
+      QueryInterface: ChromeUtils.generateQI(["nsINetworkLinkService"]),
+    };
+    Services.obs.notifyObservers(
+      networkLinkService,
+      "network:dns-suffix-list-updated"
+    );
+    await new TRRDNSListener("test.com", "1.2.3.4");
+    if (Services.prefs.getBoolPref("network.trr.split_horizon_mitigations")) {
+      await new TRRDNSListener("example.org", "127.0.0.1");
+      // Also test that we don't use the pushed entry.
+      await new TRRDNSListener("push.example.org", "127.0.0.1");
+    } else {
+      await new TRRDNSListener("example.org", "1.2.3.4");
+      await new TRRDNSListener("push.example.org", "2018::2018");
+    }
+
+    // Attempt to clean up, just in case
+    networkLinkService.dnsSuffixList = [];
+    Services.obs.notifyObservers(
+      networkLinkService,
+      "network:dns-suffix-list-updated"
+    );
+  }
+
+  Services.prefs.setBoolPref("network.trr.split_horizon_mitigations", true);
+  await checkDnsSuffixInMode(2);
+  Services.prefs.setCharPref("network.trr.bootstrapAddr", "127.0.0.1");
+  await checkDnsSuffixInMode(3);
+  Services.prefs.setBoolPref("network.trr.split_horizon_mitigations", false);
+  // Test again with mitigations off
+  await checkDnsSuffixInMode(2);
+  await checkDnsSuffixInMode(3);
+  Services.prefs.clearUserPref("network.trr.split_horizon_mitigations");
+  Services.prefs.clearUserPref("network.trr.bootstrapAddr");
+});
+
+add_task(async function test_async_resolve_with_trr_server() {
+  info("Checking asyncResolveWithTrrServer");
+  Services.dns.clearCache(true);
+  Services.prefs.setIntPref("network.trr.mode", 0); // TRR-disabled
+
+  await new TRRDNSListener(
+    "bar_with_trr1.example.com",
+    "2.2.2.2",
+    true,
+    undefined,
+    `https://foo.example.com:${h2Port}/doh?responseIP=2.2.2.2`
+  );
+
+  // Test request without trr server, it should return a native dns response.
+  await new TRRDNSListener("bar_with_trr1.example.com", "127.0.0.1");
+
+  // Mode 2
+  Services.dns.clearCache(true);
+  setModeAndURI(2, "doh?responseIP=2.2.2.2");
+
+  await new TRRDNSListener(
+    "bar_with_trr2.example.com",
+    "3.3.3.3",
+    true,
+    undefined,
+    `https://foo.example.com:${h2Port}/doh?responseIP=3.3.3.3`
+  );
+
+  // Test request without trr server, it should return a response from trr server defined in the pref.
+  await new TRRDNSListener("bar_with_trr2.example.com", "2.2.2.2");
+
+  // Mode 3
+  Services.dns.clearCache(true);
+  setModeAndURI(3, "doh?responseIP=2.2.2.2");
+
+  await new TRRDNSListener(
+    "bar_with_trr3.example.com",
+    "3.3.3.3",
+    true,
+    undefined,
+    `https://foo.example.com:${h2Port}/doh?responseIP=3.3.3.3`
+  );
+
+  // Test request without trr server, it should return a response from trr server defined in the pref.
+  await new TRRDNSListener("bar_with_trr3.example.com", "2.2.2.2");
+
+  // Mode 5
+  Services.dns.clearCache(true);
+  setModeAndURI(5, "doh?responseIP=2.2.2.2");
+
+  // When dns is resolved in socket process, we can't set |expectEarlyFail| to true.
+  let inSocketProcess = mozinfo.socketprocess_networking;
+  await new TRRDNSListener(
+    "bar_with_trr3.example.com",
+    undefined,
+    false,
+    undefined,
+    `https://foo.example.com:${h2Port}/doh?responseIP=3.3.3.3`,
+    !inSocketProcess
+  );
+
+  // Call normal AsyncOpen, it will return result from the native resolver.
+  await new TRRDNSListener("bar_with_trr3.example.com", "127.0.0.1");
+
+  // Check that cache is ignored when server is different
+  Services.dns.clearCache(true);
+  setModeAndURI(3, "doh?responseIP=2.2.2.2");
+
+  await new TRRDNSListener("bar_with_trr4.example.com", "2.2.2.2", true);
+
+  // The record will be fetch again.
+  await new TRRDNSListener(
+    "bar_with_trr4.example.com",
+    "3.3.3.3",
+    true,
+    undefined,
+    `https://foo.example.com:${h2Port}/doh?responseIP=3.3.3.3`
+  );
+
+  // The record will be fetch again.
+  await new TRRDNSListener(
+    "bar_with_trr5.example.com",
+    "4.4.4.4",
+    true,
+    undefined,
+    `https://foo.example.com:${h2Port}/doh?responseIP=4.4.4.4`
+  );
+
+  // Check no fallback and no blocklisting upon failure
+  Services.dns.clearCache(true);
+  setModeAndURI(2, "doh?responseIP=2.2.2.2");
+
+  let { inStatus } = await new TRRDNSListener(
+    "bar_with_trr6.example.com",
+    undefined,
+    false,
+    undefined,
+    `https://foo.example.com:${h2Port}/404`
+  );
+  Assert.ok(
+    !Components.isSuccessCode(inStatus),
+    `${inStatus} should be an error code`
+  );
+
+  await new TRRDNSListener("bar_with_trr6.example.com", "2.2.2.2", true);
+
+  // Check that DoH push doesn't work
+  Services.dns.clearCache(true);
+  setModeAndURI(2, "doh?responseIP=2.2.2.2");
+
+  await new TRRDNSListener(
+    "bar_with_trr7.example.com",
+    "3.3.3.3",
+    true,
+    undefined,
+    `https://foo.example.com:${h2Port}/doh?responseIP=3.3.3.3&push=true`
+  );
+
+  // AsyncResoleWithTrrServer rejects server pushes and the entry for push.example.org
+  // shouldn't be neither in the default cache not in AsyncResoleWithTrrServer cache.
+  setModeAndURI(2, "404");
+
+  await new TRRDNSListener(
+    "push.example.org",
+    "3.3.3.3",
+    true,
+    undefined,
+    `https://foo.example.com:${h2Port}/doh?responseIP=3.3.3.3&push=true`
+  );
+
+  await new TRRDNSListener("push.example.org", "127.0.0.1");
+
+  // Check confirmation is ignored
+  Services.dns.clearCache(true);
+  setModeAndURI(2, "doh?responseIP=1::ffff");
+  Services.prefs.clearUserPref("network.trr.useGET");
+  Services.prefs.clearUserPref("network.trr.disable-ECS");
+  Services.prefs.setCharPref(
+    "network.trr.confirmationNS",
+    "confirm.example.com"
+  );
+
+  // AsyncResoleWithTrrServer will succeed
+  await new TRRDNSListener(
+    "bar_with_trr8.example.com",
+    "3.3.3.3",
+    true,
+    undefined,
+    `https://foo.example.com:${h2Port}/doh?responseIP=3.3.3.3`
+  );
+
+  Services.prefs.setCharPref("network.trr.confirmationNS", "skip");
+
+  // Bad port
+  Services.dns.clearCache(true);
+  setModeAndURI(2, "doh?responseIP=2.2.2.2");
+
+  ({ inStatus } = await new TRRDNSListener(
+    "only_once.example.com",
+    undefined,
+    false,
+    undefined,
+    `https://target.example.com:666/404`
+  ));
+  Assert.ok(
+    !Components.isSuccessCode(inStatus),
+    `${inStatus} should be an error code`
+  );
+
+  // // MOZ_LOG=sync,timestamp,nsHostResolver:5 We should not keep resolving only_once.example.com
+  // // TODO: find a way of automating this
+  // await new Promise(resolve => {});
+});
+
+add_task(test_fetch_time);
+
+add_task(async function test_content_encoding_gzip() {
+  info("Checking gzip content encoding");
+  Services.dns.clearCache(true);
+  Services.prefs.setBoolPref(
+    "network.trr.send_empty_accept-encoding_headers",
+    false
+  );
+  setModeAndURI(3, "doh?responseIP=2.2.2.2");
+
+  await new TRRDNSListener("bar.example.com", "2.2.2.2");
+  Services.prefs.clearUserPref(
+    "network.trr.send_empty_accept-encoding_headers"
+  );
+});
+
+add_task(async function test_redirect() {
+  info("Check handling of redirect");
+
+  // GET
+  Services.dns.clearCache(true);
+  setModeAndURI(3, "doh?redirect=4.4.4.4{&dns}");
+  Services.prefs.setBoolPref("network.trr.useGET", true);
+  Services.prefs.setBoolPref("network.trr.disable-ECS", true);
+
+  await new TRRDNSListener("ecs.example.com", "4.4.4.4");
+
+  // POST
+  Services.dns.clearCache(true);
+  Services.prefs.setBoolPref("network.trr.useGET", false);
+  setModeAndURI(3, "doh?redirect=4.4.4.4");
+
+  await new TRRDNSListener("bar.example.com", "4.4.4.4");
+
+  Services.prefs.clearUserPref("network.trr.useGET");
+  Services.prefs.clearUserPref("network.trr.disable-ECS");
+});
+
+// confirmationNS set without confirmed NS yet
+// checks that we properly fall back to DNS is confirmation is not ready yet,
+// and wait-for-confirmation pref is true
+add_task(async function test_confirmation() {
+  info("Checking that we fall back correctly when confirmation is pending");
+  Services.dns.clearCache(true);
+  Services.prefs.setBoolPref("network.trr.wait-for-confirmation", true);
+  setModeAndURI(2, "doh?responseIP=7.7.7.7&slowConfirm=true");
+  Services.prefs.setCharPref(
+    "network.trr.confirmationNS",
+    "confirm.example.com"
+  );
+
+  await new TRRDNSListener("example.org", "127.0.0.1");
+  await new Promise(resolve => do_timeout(1000, resolve));
+  await waitForConfirmation("7.7.7.7");
+
+  // Reset between each test to force re-confirm
+  Services.prefs.setCharPref("network.trr.confirmationNS", "skip");
+
+  info("Check that confirmation is skipped in mode 3");
+  // This is just a smoke test to make sure lookups succeed immediately
+  // in mode 3 without waiting for confirmation.
+  Services.dns.clearCache(true);
+  setModeAndURI(3, "doh?responseIP=1::ffff&slowConfirm=true");
+  Services.prefs.setCharPref(
+    "network.trr.confirmationNS",
+    "confirm.example.com"
+  );
+
+  await new TRRDNSListener("skipConfirmationForMode3.example.com", "1::ffff");
+
+  // Reset between each test to force re-confirm
+  Services.prefs.setCharPref("network.trr.confirmationNS", "skip");
+
+  Services.dns.clearCache(true);
+  Services.prefs.setBoolPref("network.trr.wait-for-confirmation", false);
+  setModeAndURI(2, "doh?responseIP=7.7.7.7&slowConfirm=true");
+  Services.prefs.setCharPref(
+    "network.trr.confirmationNS",
+    "confirm.example.com"
+  );
+
+  // DoH available immediately
+  await new TRRDNSListener("example.org", "7.7.7.7");
+
+  // Reset between each test to force re-confirm
+  Services.prefs.setCharPref("network.trr.confirmationNS", "skip");
+
+  // Fallback when confirmation fails
+  Services.dns.clearCache(true);
+  Services.prefs.setBoolPref("network.trr.wait-for-confirmation", true);
+  setModeAndURI(2, "404");
+  Services.prefs.setCharPref(
+    "network.trr.confirmationNS",
+    "confirm.example.com"
+  );
+
+  await waitForConfirmation("7.7.7.7", true);
+
+  await new TRRDNSListener("example.org", "127.0.0.1");
+
+  // Reset
+  Services.prefs.setCharPref("network.trr.confirmationNS", "skip");
+  Services.prefs.clearUserPref("network.trr.wait-for-confirmation");
+});
+
+add_task(test_fqdn);
+
+add_task(async function test_detected_uri() {
+  info("Test setDetectedTrrURI");
+  Services.dns.clearCache(true);
+  Services.prefs.setIntPref("network.trr.mode", 3);
+  Services.prefs.clearUserPref("network.trr.uri");
+  let defaultURI = gDefaultPref.getCharPref("network.trr.default_provider_uri");
+  gDefaultPref.setCharPref(
+    "network.trr.default_provider_uri",
+    `https://foo.example.com:${h2Port}/doh?responseIP=3.4.5.6`
+  );
+  await new TRRDNSListener("domainA.example.org.", "3.4.5.6");
+  Services.dns.setDetectedTrrURI(
+    `https://foo.example.com:${h2Port}/doh?responseIP=1.2.3.4`
+  );
+  await new TRRDNSListener("domainB.example.org.", "1.2.3.4");
+  gDefaultPref.setCharPref("network.trr.default_provider_uri", defaultURI);
+
+  // With a user-set doh uri this time.
+  Services.dns.clearCache(true);
+  setModeAndURI(2, "doh?responseIP=4.5.6.7");
+  await new TRRDNSListener("domainA.example.org.", "4.5.6.7");
+
+  // This should be a no-op, since we have a user-set URI
+  Services.dns.setDetectedTrrURI(
+    `https://foo.example.com:${h2Port}/doh?responseIP=1.2.3.4`
+  );
+  await new TRRDNSListener("domainB.example.org.", "4.5.6.7");
+
+  // Test network link status change
+  Services.dns.clearCache(true);
+  Services.prefs.setIntPref("network.trr.mode", 3);
+  Services.prefs.clearUserPref("network.trr.uri");
+  gDefaultPref.setCharPref(
+    "network.trr.default_provider_uri",
+    `https://foo.example.com:${h2Port}/doh?responseIP=3.4.5.6`
+  );
+  await new TRRDNSListener("domainA.example.org.", "3.4.5.6");
+  Services.dns.setDetectedTrrURI(
+    `https://foo.example.com:${h2Port}/doh?responseIP=1.2.3.4`
+  );
+  await new TRRDNSListener("domainB.example.org.", "1.2.3.4");
+
+  let networkLinkService = {
+    platformDNSIndications: 0,
+    QueryInterface: ChromeUtils.generateQI(["nsINetworkLinkService"]),
+  };
+
+  Services.obs.notifyObservers(
+    networkLinkService,
+    "network:link-status-changed",
+    "changed"
+  );
+
+  await new TRRDNSListener("domainC.example.org.", "3.4.5.6");
+
+  gDefaultPref.setCharPref("network.trr.default_provider_uri", defaultURI);
+});
+
+add_task(async function test_pref_changes() {
+  info("Testing pref change handling");
+  Services.prefs.clearUserPref("network.trr.uri");
+  let defaultURI = gDefaultPref.getCharPref("network.trr.default_provider_uri");
+
+  async function doThenCheckURI(closure, expectedURI, expectChange = true) {
+    let uriChanged;
+    if (expectChange) {
+      uriChanged = topicObserved("network:trr-uri-changed");
+    }
+    closure();
+    if (expectChange) {
+      await uriChanged;
+    }
+    equal(Services.dns.currentTrrURI, expectedURI);
+  }
+
+  // setting the default value of the pref should be reflected in the URI
+  await doThenCheckURI(() => {
+    gDefaultPref.setCharPref(
+      "network.trr.default_provider_uri",
+      `https://foo.example.com:${h2Port}/doh?default`
+    );
+  }, `https://foo.example.com:${h2Port}/doh?default`);
+
+  // the user set value should be reflected in the URI
+  await doThenCheckURI(() => {
+    Services.prefs.setCharPref(
+      "network.trr.uri",
+      `https://foo.example.com:${h2Port}/doh?user`
+    );
+  }, `https://foo.example.com:${h2Port}/doh?user`);
+
+  // A user set pref is selected, so it should be chosen instead of the rollout
+  await doThenCheckURI(
+    () => {
+      Services.prefs.setCharPref(
+        "doh-rollout.uri",
+        `https://foo.example.com:${h2Port}/doh?rollout`
+      );
+    },
+    `https://foo.example.com:${h2Port}/doh?user`,
+    false
+  );
+
+  // There is no user set pref, so we go to the rollout pref
+  await doThenCheckURI(() => {
+    Services.prefs.clearUserPref("network.trr.uri");
+  }, `https://foo.example.com:${h2Port}/doh?rollout`);
+
+  // When the URI is set by the rollout addon, detection is allowed
+  await doThenCheckURI(() => {
+    Services.dns.setDetectedTrrURI(
+      `https://foo.example.com:${h2Port}/doh?detected`
+    );
+  }, `https://foo.example.com:${h2Port}/doh?detected`);
+
+  // Should switch back to the default provided by the rollout addon
+  await doThenCheckURI(() => {
+    let networkLinkService = {
+      platformDNSIndications: 0,
+      QueryInterface: ChromeUtils.generateQI(["nsINetworkLinkService"]),
+    };
+    Services.obs.notifyObservers(
+      networkLinkService,
+      "network:link-status-changed",
+      "changed"
+    );
+  }, `https://foo.example.com:${h2Port}/doh?rollout`);
+
+  // Again the user set pref should be chosen
+  await doThenCheckURI(() => {
+    Services.prefs.setCharPref(
+      "network.trr.uri",
+      `https://foo.example.com:${h2Port}/doh?user`
+    );
+  }, `https://foo.example.com:${h2Port}/doh?user`);
+
+  // Detection should not work with a user set pref
+  await doThenCheckURI(
+    () => {
+      Services.dns.setDetectedTrrURI(
+        `https://foo.example.com:${h2Port}/doh?detected`
+      );
+    },
+    `https://foo.example.com:${h2Port}/doh?user`,
+    false
+  );
+
+  // Should stay the same on network changes
+  await doThenCheckURI(
+    () => {
+      let networkLinkService = {
+        platformDNSIndications: 0,
+        QueryInterface: ChromeUtils.generateQI(["nsINetworkLinkService"]),
+      };
+      Services.obs.notifyObservers(
+        networkLinkService,
+        "network:link-status-changed",
+        "changed"
+      );
+    },
+    `https://foo.example.com:${h2Port}/doh?user`,
+    false
+  );
+
+  // Restore the pref
+  gDefaultPref.setCharPref("network.trr.default_provider_uri", defaultURI);
+});
+
+add_task(async function test_dohrollout_mode() {
+  info("Testing doh-rollout.mode");
+  Services.prefs.clearUserPref("network.trr.mode");
+  Services.prefs.clearUserPref("doh-rollout.mode");
+
+  equal(Services.dns.currentTrrMode, 0);
+
+  async function doThenCheckMode(trrMode, rolloutMode, expectedMode, message) {
+    let modeChanged;
+    if (Services.dns.currentTrrMode != expectedMode) {
+      modeChanged = topicObserved("network:trr-mode-changed");
+    }
+
+    if (trrMode != undefined) {
+      Services.prefs.setIntPref("network.trr.mode", trrMode);
+    }
+
+    if (rolloutMode != undefined) {
+      Services.prefs.setIntPref("doh-rollout.mode", rolloutMode);
+    }
+
+    if (modeChanged) {
+      await modeChanged;
+    }
+    equal(Services.dns.currentTrrMode, expectedMode, message);
+  }
+
+  await doThenCheckMode(2, undefined, 2);
+  await doThenCheckMode(3, undefined, 3);
+  await doThenCheckMode(5, undefined, 5);
+  await doThenCheckMode(2, undefined, 2);
+  await doThenCheckMode(0, undefined, 0);
+  await doThenCheckMode(1, undefined, 5);
+  await doThenCheckMode(6, undefined, 5);
+
+  await doThenCheckMode(2, 0, 2);
+  await doThenCheckMode(2, 1, 2);
+  await doThenCheckMode(2, 2, 2);
+  await doThenCheckMode(2, 3, 2);
+  await doThenCheckMode(2, 5, 2);
+  await doThenCheckMode(3, 2, 3);
+  await doThenCheckMode(5, 2, 5);
+
+  Services.prefs.clearUserPref("network.trr.mode");
+  Services.prefs.clearUserPref("doh-rollout.mode");
+
+  await doThenCheckMode(undefined, 2, 2);
+  await doThenCheckMode(undefined, 3, 3);
+
+  // All modes that are not 0,2,3 are treated as 5
+  await doThenCheckMode(undefined, 5, 5);
+  await doThenCheckMode(undefined, 4, 5);
+  await doThenCheckMode(undefined, 6, 5);
+
+  await doThenCheckMode(undefined, 2, 2);
+  await doThenCheckMode(3, undefined, 3);
+
+  Services.prefs.clearUserPref("network.trr.mode");
+  equal(Services.dns.currentTrrMode, 2);
+  Services.prefs.clearUserPref("doh-rollout.mode");
+  equal(Services.dns.currentTrrMode, 0);
+});
+
+add_task(test_ipv6_trr_fallback);
+
+add_task(test_ipv4_trr_fallback);
+
+add_task(test_no_retry_without_doh);
+
+// This test checks that normally when the TRR mode goes from ON -> OFF
+// we purge the DNS cache (including TRR), so the entries aren't used on
+// networks where they shouldn't. For example - turning on a VPN.
+add_task(async function test_purge_trr_cache_on_mode_change() {
+  info("Checking that we purge cache when TRR is turned off");
+  Services.prefs.setBoolPref("network.trr.clear-cache-on-pref-change", true);
+
+  Services.prefs.setIntPref("network.trr.mode", 0);
+  Services.prefs.setIntPref("doh-rollout.mode", 2);
+  Services.prefs.setCharPref(
+    "network.trr.uri",
+    `https://foo.example.com:${h2Port}/doh?responseIP=3.3.3.3`
+  );
+
+  await new TRRDNSListener("cached.example.com", "3.3.3.3");
+  Services.prefs.clearUserPref("doh-rollout.mode");
+
+  await new TRRDNSListener("cached.example.com", "127.0.0.1");
+
+  Services.prefs.setBoolPref("network.trr.clear-cache-on-pref-change", false);
+  Services.prefs.clearUserPref("doh-rollout.mode");
+});
+
+add_task(async function test_old_bootstrap_pref() {
+  Services.dns.clearCache(true);
+  // Note this is a remote address. Setting this pref should have no effect,
+  // as this is the old name for the bootstrap pref.
+  // If this were to be used, the test would crash when accessing a non-local
+  // IP address.
+  Services.prefs.setCharPref("network.trr.bootstrapAddress", "1.1.1.1");
+  setModeAndURI(Ci.nsIDNSService.MODE_TRRONLY, `doh?responseIP=4.4.4.4`);
+  await new TRRDNSListener("testytest.com", "4.4.4.4");
+});
+
+add_task(async function test_padding() {
+  setModeAndURI(Ci.nsIDNSService.MODE_TRRONLY, `doh`);
+  async function CheckPadding(
+    pad_length,
+    request,
+    none,
+    ecs,
+    padding,
+    ecsPadding
+  ) {
+    Services.prefs.setIntPref("network.trr.padding.length", pad_length);
+    Services.dns.clearCache(true);
+    Services.prefs.setBoolPref("network.trr.padding", false);
+    Services.prefs.setBoolPref("network.trr.disable-ECS", false);
+    await new TRRDNSListener(request, none);
+
+    Services.dns.clearCache(true);
+    Services.prefs.setBoolPref("network.trr.padding", false);
+    Services.prefs.setBoolPref("network.trr.disable-ECS", true);
+    await new TRRDNSListener(request, ecs);
+
+    Services.dns.clearCache(true);
+    Services.prefs.setBoolPref("network.trr.padding", true);
+    Services.prefs.setBoolPref("network.trr.disable-ECS", false);
+    await new TRRDNSListener(request, padding);
+
+    Services.dns.clearCache(true);
+    Services.prefs.setBoolPref("network.trr.padding", true);
+    Services.prefs.setBoolPref("network.trr.disable-ECS", true);
+    await new TRRDNSListener(request, ecsPadding);
+  }
+
+  // short domain name
+  await CheckPadding(
+    16,
+    "a.pd",
+    "2.2.0.22",
+    "2.2.0.41",
+    "1.1.0.48",
+    "1.1.0.48"
+  );
+  await CheckPadding(256, "a.pd", "2.2.0.22", "2.2.0.41", "1.1.1.0", "1.1.1.0");
+
+  // medium domain name
+  await CheckPadding(
+    16,
+    "has-padding.pd",
+    "2.2.0.32",
+    "2.2.0.51",
+    "1.1.0.48",
+    "1.1.0.64"
+  );
+  await CheckPadding(
+    128,
+    "has-padding.pd",
+    "2.2.0.32",
+    "2.2.0.51",
+    "1.1.0.128",
+    "1.1.0.128"
+  );
+  await CheckPadding(
+    80,
+    "has-padding.pd",
+    "2.2.0.32",
+    "2.2.0.51",
+    "1.1.0.80",
+    "1.1.0.80"
+  );
+
+  // long domain name
+  await CheckPadding(
+    16,
+    "abcdefghijklmnopqrstuvwxyz0123456789.abcdefghijklmnopqrstuvwxyz0123456789.abcdefghijklmnopqrstuvwxyz0123456789.pd",
+    "2.2.0.131",
+    "2.2.0.150",
+    "1.1.0.160",
+    "1.1.0.160"
+  );
+  await CheckPadding(
+    128,
+    "abcdefghijklmnopqrstuvwxyz0123456789.abcdefghijklmnopqrstuvwxyz0123456789.abcdefghijklmnopqrstuvwxyz0123456789.pd",
+    "2.2.0.131",
+    "2.2.0.150",
+    "1.1.1.0",
+    "1.1.1.0"
+  );
+  await CheckPadding(
+    80,
+    "abcdefghijklmnopqrstuvwxyz0123456789.abcdefghijklmnopqrstuvwxyz0123456789.abcdefghijklmnopqrstuvwxyz0123456789.pd",
+    "2.2.0.131",
+    "2.2.0.150",
+    "1.1.0.160",
+    "1.1.0.160"
+  );
+});
+
+add_task(test_connection_reuse_and_cycling);