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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| /** | ||
| * Copyright 2020 The AMP HTML Authors. All Rights Reserved. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS-IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| const argv = require('minimist')(process.argv.slice(2)); | ||
| const colors = require('ansi-colors'); | ||
| const log = require('fancy-log'); | ||
| const readline = require('readline'); | ||
| const {exec, execScriptAsync} = require('../common/exec'); | ||
|
|
||
| const PERMITTED_DOMAIN_REGEXES = [ | ||
| /\.internal$/, // Travis use | ||
| /^(amp-test-status-bot)\.appspot\.com$/, // Infra team use | ||
| /\.test$/, // .test TLD is safe to use for tests | ||
| ]; | ||
|
|
||
| const TCPDUMP_DNS_REGEX = /^(\d{2}:\d{2}:\d{2})\.\d{6} IP6? [^ ]+ > [^ ]+: \d+\+ (A|AAAA)\? ([^ ]+)\. \(\d+\)$/; | ||
|
|
||
| /** | ||
| * Monitor DNS requests | ||
| * @return {!Promise} | ||
| */ | ||
| function dnsMonitor() { | ||
| let resolver; | ||
| const deferred = new Promise(resolverIn => { | ||
| resolver = resolverIn; | ||
| }); | ||
|
|
||
| const monProcess = execScriptAsync('sudo tcpdump -l port 53'); | ||
| console.log(monProcess.pid); | ||
| monProcess.unref(); | ||
| console.log(monProcess.pid); | ||
| const domainAccesses = new Map(); | ||
|
|
||
| const onFinish = () => { | ||
| if (domainAccesses.size) { | ||
| log( | ||
| 'Tests that send requests to external domains might slow', | ||
| 'down the tests and cause flakiness.' | ||
| ); | ||
| log( | ||
| 'If possible, please change them to a *.test domain since', | ||
| 'they never resolve.' | ||
| ); | ||
| log( | ||
| 'If these requests are indeed necessary to the test, go to', | ||
| colors.cyan('build-system/tasks/dns-monitor.js'), | ||
| 'to permit it.' | ||
| ); | ||
| if (!argv.nonblocking) { | ||
| process.exitCode = 1; | ||
| } | ||
| } else { | ||
| log(colors.green('No impermissible external requests found')); | ||
| } | ||
| for (const [domain, ts] of domainAccesses.entries()) { | ||
| log(ts, 'Request(s) to', colors.red(domain), 'recorded.'); | ||
| } | ||
|
|
||
| monProcess.kill(); | ||
| execScriptAsync('sudo kill ' + monProcess.pid); | ||
| setTimeout(() => { | ||
| execScriptAsync('sudo ps -ef').stdout.pipe(process.stdout); | ||
| execScriptAsync('sudo kill -9 ' + monProcess.pid); | ||
| }, 500); | ||
| resolver(); | ||
| }; | ||
| process.on('SIGTERM', onFinish); | ||
| process.on('SIGINT', onFinish); | ||
|
|
||
| console.error('DNS Ready'); // To signal that the monitor is up. | ||
| readline | ||
| .createInterface({ | ||
| input: monProcess.stdout, | ||
| }) | ||
| .on('line', line => { | ||
| handleLog_(line, domainAccesses); | ||
| }); | ||
| return deferred; | ||
| } | ||
|
|
||
| function handleLog_(line, domainAccesses) { | ||
| const match = TCPDUMP_DNS_REGEX.exec(line); | ||
| if ( | ||
| match && | ||
| !domainAccesses.has(match[3]) && | ||
| !matchOneOfRegexes(match[3], PERMITTED_DOMAIN_REGEXES) | ||
| ) { | ||
| domainAccesses.set(match[3], match[1]); | ||
| } | ||
| } | ||
|
|
||
| function matchOneOfRegexes(testStr, regexes) { | ||
| for (let i = 0; i < regexes.length; i++) { | ||
| if (regexes[i].exec(testStr)) { | ||
| return true; | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
|
|
||
| module.exports = { | ||
| dnsMonitor, | ||
| }; | ||
|
|
||
| dnsMonitor.description = | ||
| 'Check if there are unpermitted DNS requests (requires sudo)'; | ||
| dnsMonitor.flags = { | ||
| 'nonblocking': 'Do not block the test even if the test fails', | ||
| }; |
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