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Doar Mihai
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<?php
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namespace App\Jobs;
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use App\Models\DnsRecord;
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use App\Notifications\DnsRecordAlert;
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use Illuminate\Bus\Queueable;
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use Illuminate\Contracts\Queue\ShouldQueue;
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use Illuminate\Foundation\Bus\Dispatchable;
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use Illuminate\Queue\InteractsWithQueue;
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use Illuminate\Queue\SerializesModels;
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use Illuminate\Support\Facades\Log;
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class CheckDnsRecord implements ShouldQueue
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{
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use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;
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/**
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* The number of times the job may be attempted.
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*
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* @var int
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*/
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public $tries = 3;
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/**
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* The number of seconds the job can run before timing out.
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*
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* @var int
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*/
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public $timeout = 30;
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/**
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* Create a new job instance.
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*/
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public function __construct(
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public DnsRecord $dnsRecord
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) {}
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/**
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* Execute the job.
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*/
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public function handle(): void
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{
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try {
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Log::info('CheckDnsRecord: Starting check', [
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'dns_record_id' => $this->dnsRecord->id,
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'domain' => $this->dnsRecord->domain,
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'record_type' => $this->dnsRecord->record_type,
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]);
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// Perform DNS lookup
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$result = $this->performDnsLookup();
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$wasValid = $this->dnsRecord->is_valid;
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$isValid = $result['is_valid'];
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$actualValue = $result['actual_value'];
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$errorMessage = $result['error_message'];
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// Update DNS record
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$this->dnsRecord->update([
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'last_checked_at' => now(),
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'is_valid' => $isValid,
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'actual_value' => $actualValue,
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'error_message' => $errorMessage,
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]);
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Log::info('CheckDnsRecord: Check completed', [
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'dns_record_id' => $this->dnsRecord->id,
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'is_valid' => $isValid,
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'actual_value' => $actualValue,
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]);
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// Send notification if status changed from valid to invalid
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if ($wasValid === true && $isValid === false) {
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$this->dnsRecord->site->user->notify(new DnsRecordAlert(
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$this->dnsRecord,
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'invalid',
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$actualValue,
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$errorMessage
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));
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Log::warning('CheckDnsRecord: Invalid alert sent', [
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'dns_record_id' => $this->dnsRecord->id,
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'error_message' => $errorMessage,
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]);
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}
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// Send notification when DNS is restored
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if ($wasValid === false && $isValid === true) {
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$this->dnsRecord->site->user->notify(new DnsRecordAlert(
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$this->dnsRecord,
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'valid',
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$actualValue
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));
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Log::info('CheckDnsRecord: Valid alert sent', [
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'dns_record_id' => $this->dnsRecord->id,
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]);
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}
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} catch (\Exception $e) {
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Log::error('CheckDnsRecord: Unexpected error', [
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'dns_record_id' => $this->dnsRecord->id,
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'error' => $e->getMessage(),
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'trace' => $e->getTraceAsString(),
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]);
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$this->dnsRecord->update([
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'last_checked_at' => now(),
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'is_valid' => false,
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'error_message' => 'Unexpected error: ' . $e->getMessage(),
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]);
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throw $e;
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}
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}
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/**
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* Perform DNS lookup and validation.
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*/
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protected function performDnsLookup(): array
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{
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try {
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// Map record type to DNS_* constant
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$dnsType = $this->getDnsTypeConstant($this->dnsRecord->record_type);
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if ($dnsType === null) {
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return [
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'is_valid' => false,
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'actual_value' => null,
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'error_message' => "Unsupported DNS record type: {$this->dnsRecord->record_type}",
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];
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}
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// Perform DNS lookup
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$records = @dns_get_record($this->dnsRecord->domain, $dnsType);
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if ($records === false) {
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$error = error_get_last();
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return [
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'is_valid' => false,
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'actual_value' => null,
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'error_message' => 'DNS lookup failed: ' . ($error['message'] ?? 'Unknown error'),
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];
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}
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if (empty($records)) {
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return [
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'is_valid' => false,
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'actual_value' => null,
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'error_message' => "No {$this->dnsRecord->record_type} records found for {$this->dnsRecord->domain}",
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];
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}
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// Extract values based on record type
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$actualValues = $this->extractDnsValues($records, $this->dnsRecord->record_type);
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// If no expected value, just return that records exist
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if (empty($this->dnsRecord->expected_value)) {
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return [
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'is_valid' => true,
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'actual_value' => $actualValues,
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'error_message' => null,
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];
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}
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// Validate against expected value
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$isValid = $this->validateDnsValue($actualValues, $this->dnsRecord->expected_value);
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return [
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'is_valid' => $isValid,
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'actual_value' => $actualValues,
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'error_message' => $isValid ? null : 'DNS record does not match expected value',
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];
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} catch (\Exception $e) {
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return [
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'is_valid' => false,
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'actual_value' => null,
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'error_message' => 'DNS lookup error: ' . $e->getMessage(),
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];
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}
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}
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/**
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* Get DNS type constant for dns_get_record().
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*/
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protected function getDnsTypeConstant(string $recordType): ?int
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{
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return match (strtoupper($recordType)) {
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'A' => DNS_A,
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'AAAA' => DNS_AAAA,
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'CNAME' => DNS_CNAME,
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'MX' => DNS_MX,
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'TXT' => DNS_TXT,
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'NS' => DNS_NS,
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'SOA' => DNS_SOA,
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'PTR' => DNS_PTR,
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'SRV' => DNS_SRV,
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default => null,
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};
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}
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/**
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* Extract DNS values from records.
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*/
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protected function extractDnsValues(array $records, string $recordType): array
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{
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$values = [];
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foreach ($records as $record) {
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$value = match (strtoupper($recordType)) {
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'A' => $record['ip'] ?? null,
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'AAAA' => $record['ipv6'] ?? null,
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'CNAME' => $record['target'] ?? null,
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'MX' => isset($record['target']) ? "{$record['pri']} {$record['target']}" : null,
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'TXT' => $record['txt'] ?? null,
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'NS' => $record['target'] ?? null,
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'SOA' => isset($record['mname']) ? $record['mname'] : null,
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'PTR' => $record['target'] ?? null,
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'SRV' => isset($record['target']) ? "{$record['pri']} {$record['weight']} {$record['port']} {$record['target']}" : null,
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default => null,
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};
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if ($value !== null) {
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$values[] = $value;
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}
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}
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return $values;
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}
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/**
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* Validate DNS value against expected value.
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*/
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protected function validateDnsValue(array $actualValues, string $expectedValue): bool
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{
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// Normalize expected value
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$expectedValue = trim($expectedValue);
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// Check if any actual value matches expected
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foreach ($actualValues as $actualValue) {
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// Exact match
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if (strcasecmp($actualValue, $expectedValue) === 0) {
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return true;
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}
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// Partial match for MX and SRV records (check target only)
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if (stripos($actualValue, $expectedValue) !== false) {
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return true;
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}
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}
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return false;
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}
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/**
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* Handle a job failure.
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*/
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public function failed(\Throwable $exception): void
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{
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Log::error('CheckDnsRecord: Job failed after all retries', [
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'dns_record_id' => $this->dnsRecord->id,
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'exception' => $exception->getMessage(),
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]);
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}
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}
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