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Test Info:
- Manifest: netwerk/test/unit/xpcshell.toml
/* 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
"use strict";
// This test simmulates intermittent native DNS functionality.
// We verify that we don't use the negative DNS record for the DoH server.
// The first resolve of foo.example.com fails, so we expect TRR not to work.
// Immediately after the native DNS starts working, it should connect to the
// TRR server and start working.
const override = Cc["@mozilla.org/network/native-dns-override;1"].getService(
Ci.nsINativeDNSResolverOverride
);
function setup() {
trr_test_setup();
Services.prefs.clearUserPref("network.trr.bootstrapAddr");
Services.prefs.clearUserPref("network.dns.native-is-localhost");
}
setup();
registerCleanupFunction(async () => {
trr_clear_prefs();
override.clearOverrides();
});
add_task(async function intermittent_dns_mode3() {
override.addIPOverride("foo.example.com", "N/A");
let trrServer = new TRRServer();
registerCleanupFunction(async () => {
await trrServer.stop();
});
await trrServer.start();
info(`port = ${trrServer.port()}\n`);
Services.dns.clearCache(true);
Services.prefs.setCharPref(
"network.trr.uri",
);
Services.prefs.setIntPref("network.trr.mode", Ci.nsIDNSService.MODE_TRRONLY);
await trrServer.registerDoHAnswers("example.com", "A", {
answers: [
{
name: "example.com",
ttl: 55,
type: "A",
flush: false,
data: "1.2.3.4",
},
],
});
let { inStatus } = await new TRRDNSListener("example.com", {
expectedSuccess: false,
});
equal(inStatus, Cr.NS_ERROR_UNKNOWN_HOST);
await trrServer.registerDoHAnswers("example.org", "A", {
answers: [
{
name: "example.org",
ttl: 55,
type: "A",
flush: false,
data: "1.2.3.4",
},
],
});
override.addIPOverride("foo.example.com", "127.0.0.1");
await new TRRDNSListener("example.org", { expectedAnswer: "1.2.3.4" });
await trrServer.stop();
});
add_task(async function intermittent_dns_mode2() {
override.addIPOverride("foo.example.com", "N/A");
let trrServer = new TRRServer();
registerCleanupFunction(async () => {
await trrServer.stop();
});
await trrServer.start();
info(`port = ${trrServer.port()}\n`);
Services.dns.clearCache(true);
Services.prefs.setIntPref(
"network.trr.mode",
Ci.nsIDNSService.MODE_NATIVEONLY
);
Services.prefs.setCharPref(
"network.trr.uri",
);
Services.prefs.setIntPref("network.trr.mode", Ci.nsIDNSService.MODE_TRRFIRST);
await trrServer.registerDoHAnswers("example.com", "A", {
answers: [
{
name: "example.com",
ttl: 55,
type: "A",
flush: false,
data: "1.1.1.1",
},
],
});
override.addIPOverride("example.com", "2.2.2.2");
await new TRRDNSListener("example.com", {
expectedAnswer: "2.2.2.2",
});
await trrServer.registerDoHAnswers("example.org", "A", {
answers: [
{
name: "example.org",
ttl: 55,
type: "A",
flush: false,
data: "1.2.3.4",
},
],
});
override.addIPOverride("example.org", "3.3.3.3");
override.addIPOverride("foo.example.com", "127.0.0.1");
await new TRRDNSListener("example.org", { expectedAnswer: "1.2.3.4" });
await trrServer.stop();
});