Mesour DNS checker

• Author
• DNS checker written in PHP for check and compare real DNS records for domain.
• In `AaaaDnsRecord` is IPv6 compressed to short format.
• Problem with PHP warning: `dns_get_record(): A temporary server error occurred.` is resolved.

Install

• With Composer

  composer require mesour/dns-checker

• Or download source from GitHub

Usage

1. Create instance `\Mesour\DnsChecker\Providers\DnsRecordProvider`:

$provider = new \Mesour\DnsChecker\Providers\DnsRecordProvider();

2. Create instance `\Mesour\DnsChecker\DnsChecker`:

$checker = new \Mesour\DnsChecker\DnsChecker($provider);

3. Get DNS record set (second parameter `type` have same values as parameter `type` for PHP function dns_get_record().):

$dnsRecordSet = $checker->getDnsRecordSet('example.com', DNS_A + DNS_AAAA);

$dnsRecordSet contains for example:

Mesour\DnsChecker\DnsRecordSet
   dnsRecords private => array (3)
   |  0 => Mesour\DnsChecker\MxRecord #86b8
   |  |  priority private => 40
   |  |  target private => "alt3.aspmx.l.example.com" (24)
   |  |  type private => "MX" (2)
   |  |  name private => "example.com" (11)
   |  |  content private => "40 alt3.aspmx.l.example.com" (27)
   |  |  ttl private => 404
   |  1 => Mesour\DnsChecker\MxRecord #5a7b
   |  |  priority private => 50
   |  |  target private => "alt4.aspmx.l.example.com" (24)
   |  |  type private => "MX" (2)
   |  |  name private => "example.com" (11)
   |  |  content private => "50 alt4.aspmx.l.example.com" (27)
   |  |  ttl private => 404

DnsRecordSet

• Implements `\ArrayAccess`, `\Countable` and `\Iterator`.

Check if exist domain record:

$dnsRecord = new \Mesour\DnsChecker\Records\DnsRecord('NS', 'example.com', 'ns3.example.com');
Assert::true($dnsRecordSet->hasRecord($dnsRecord));

Get matching DNS record:

$dnsRecord = new \Mesour\DnsChecker\Records\DnsRecord('AAAA', 'example.com', '2a00:4444:5555:6666::200e');
$nsDnsRecord = $dnsRecordSet->getMatchingRecord($dnsRecord);

More information in one DnsRecordSet

$request = new DnsRecordRequest();
$request->addFilter('example.com');
$request->addFilter('www.example.com', DNS_CNAME);
// ... more lines

/ @var \Mesour\DnsChecker\DnsChecker $checker */
/ @var \Mesour\DnsChecker\DnsRecordSet $records */
$records = $checker->getDnsRecordSetFromRequest($request);

Difference between two DnsRecordSets

$factory = new DnsRecordSetDiffFactory();

$expected = $this->createExpectedDnsRecordSet();

$checker = new DnsChecker(new DnsRecordProvider());
$recordSet = $checker->getDnsRecordSet('example.com');

/ @var Mesour\DnsChecker\Diffs\DnsRecordSetDiff $diff */
$diff = $factory->createDiff($expected, $recordSet);

Assert::true($diff->hasDifferentRecord());

$diffs = $diff->getDiffs();

Assert::count(5, $diffs);
Assert::type(Mesour\DnsChecker\Diffs\DnsRecordDiff::class, $diffs[0]);

/ @var DnsRecordDiff $recordDiff */
$recordDiff = $diffs[4];
Assert::true($recordDiff->isDifferent());

// Can use this for get array of similar records with same type
$recordDiff->getSimilarRecords();

Tests

Run command vendor/bin/tester tests/ -s -c tests/php.ini --colors

PHP Stan

Run command vendor/bin/phpstan analyse -l 7 -c phpstan.neon src tests

Code style

Run command vendor/bin/phpcs --standard=ruleset.xml --extensions=php,phpt --encoding=utf-8 --tab-width=4 -sp src tests

Mock DNS record provider

For mock DNS provider your tests can use Mesour\DnsChecker\StaticDnsRecordProvider or Mesour\DnsChecker\ArrayDnsRecordProvider.

Values are as return values of PHP function dns_get_record().

$provider = new \Mesour\DnsChecker\Providers\StaticDnsRecordProvider([
	[
    	'host' => 'example.com',
    	'class' => 'IN',
    	'ttl' => 34,
    	'type' => 'A',
    	'ip' => '216.58.201.78',
    ],
]);