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Edit File : BinaryDumper.php \| Size : 6.19 KB
<?php namespace React\Dns\Protocol; use React\Dns\Model\Message; use React\Dns\Model\Record; use React\Dns\Query\Query; final class BinaryDumper { /** * @param Message $message * @return string / public function toBinary(Message $message) { $data = ''; $data .= $this->headerToBinary($message); $data .= $this->questionToBinary($message->questions); $data .= $this->recordsToBinary($message->answers); $data .= $this->recordsToBinary($message->authority); $data .= $this->recordsToBinary($message->additional); return $data; } /* * @param Message $message * @return string / private function headerToBinary(Message $message) { $data = ''; $data .= pack('n', $message->id); $flags = 0x00; $flags = ($flags << 1) \| ($message->qr ? 1 : 0); $flags = ($flags << 4) \| $message->opcode; $flags = ($flags << 1) \| ($message->aa ? 1 : 0); $flags = ($flags << 1) \| ($message->tc ? 1 : 0); $flags = ($flags << 1) \| ($message->rd ? 1 : 0); $flags = ($flags << 1) \| ($message->ra ? 1 : 0); $flags = ($flags << 3) \| 0; // skip unused zero bit $flags = ($flags << 4) \| $message->rcode; $data .= pack('n', $flags); $data .= pack('n', count($message->questions)); $data .= pack('n', count($message->answers)); $data .= pack('n', count($message->authority)); $data .= pack('n', count($message->additional)); return $data; } /* * @param Query[] $questions * @return string / private function questionToBinary(array $questions) { $data = ''; foreach ($questions as $question) { $data .= $this->domainNameToBinary($question->name); $data .= pack('n', $question->type, $question->class); } return $data; } /** * @param Record[] $records * @return string / private function recordsToBinary(array $records) { $data = ''; foreach ($records as $record) { / @var $record Record / switch ($record->type) { case Message::TYPE_A: case Message::TYPE_AAAA: $binary = \inet_pton($record->data); break; case Message::TYPE_CNAME: case Message::TYPE_NS: case Message::TYPE_PTR: $binary = $this->domainNameToBinary($record->data); break; case Message::TYPE_TXT: case Message::TYPE_SPF: $binary = $this->textsToBinary($record->data); break; case Message::TYPE_MX: $binary = \pack( 'n', $record->data['priority'] ); $binary .= $this->domainNameToBinary($record->data['target']); break; case Message::TYPE_SRV: $binary = \pack( 'n', $record->data['priority'], $record->data['weight'], $record->data['port'] ); $binary .= $this->domainNameToBinary($record->data['target']); break; case Message::TYPE_SOA: $binary = $this->domainNameToBinary($record->data['mname']); $binary .= $this->domainNameToBinary($record->data['rname']); $binary .= \pack( 'N', $record->data['serial'], $record->data['refresh'], $record->data['retry'], $record->data['expire'], $record->data['minimum'] ); break; case Message::TYPE_CAA: $binary = \pack( 'C', $record->data['flag'], \strlen($record->data['tag']) ); $binary .= $record->data['tag']; $binary .= $record->data['value']; break; case Message::TYPE_SSHFP: $binary = \pack( 'CCH', $record->data['algorithm'], $record->data['type'], $record->data['fingerprint'] ); break; case Message::TYPE_OPT: $binary = ''; foreach ($record->data as $opt => $value) { if ($opt === Message::OPT_TCP_KEEPALIVE && $value !== null) { $value = \pack('n', round($value 10)); } $binary .= \pack('n', $opt, \strlen($value)) . $value; } break; default: // RDATA is already stored as binary value for unknown record types $binary = $record->data; } $data .= $this->domainNameToBinary($record->name); $data .= \pack('nnNn', $record->type, $record->class, $record->ttl, \strlen($binary)); $data .= $binary; } return $data; } /* * @param string[] $texts * @return string / private function textsToBinary(array $texts) { $data = ''; foreach ($texts as $text) { $data .= \chr(\strlen($text)) . $text; } return $data; } /* * @param string $host * @return string */ private function domainNameToBinary($host) { if ($host === '') { return "\0"; } // break up domain name at each dot that is not preceeded by a backslash (escaped notation) return $this->textsToBinary( \array_map( 'stripcslashes', \preg_split( '/(?<!\\\\)\./', $host . '.' ) ) ); } } Back

Edit File : BinaryDumper.php | Size : 6.19 KB

<?php

namespace React\Dns\Protocol;

use React\Dns\Model\Message;
use React\Dns\Model\Record;
use React\Dns\Query\Query;

final class BinaryDumper
{
    /**
     * @param Message $message
     * @return string
     */
    public function toBinary(Message $message)
    {
        $data = '';

$data .= $this->headerToBinary($message);
        $data .= $this->questionToBinary($message->questions);
        $data .= $this->recordsToBinary($message->answers);
        $data .= $this->recordsToBinary($message->authority);
        $data .= $this->recordsToBinary($message->additional);

return $data;
    }

/**
     * @param Message $message
     * @return string
     */
    private function headerToBinary(Message $message)
    {
        $data = '';

$data .= pack('n', $message->id);

$flags = 0x00;
        $flags = ($flags << 1) | ($message->qr ? 1 : 0);
        $flags = ($flags << 4) | $message->opcode;
        $flags = ($flags << 1) | ($message->aa ? 1 : 0);
        $flags = ($flags << 1) | ($message->tc ? 1 : 0);
        $flags = ($flags << 1) | ($message->rd ? 1 : 0);
        $flags = ($flags << 1) | ($message->ra ? 1 : 0);
        $flags = ($flags << 3) | 0; // skip unused zero bit
        $flags = ($flags << 4) | $message->rcode;

$data .= pack('n', $flags);

$data .= pack('n', count($message->questions));
        $data .= pack('n', count($message->answers));
        $data .= pack('n', count($message->authority));
        $data .= pack('n', count($message->additional));

return $data;
    }

/**
     * @param Query[] $questions
     * @return string
     */
    private function questionToBinary(array $questions)
    {
        $data = '';

foreach ($questions as $question) {
            $data .= $this->domainNameToBinary($question->name);
            $data .= pack('n*', $question->type, $question->class);
        }

return $data;
    }

/**
     * @param Record[] $records
     * @return string
     */
    private function recordsToBinary(array $records)
    {
        $data = '';

foreach ($records as $record) {
            /* @var $record Record */
            switch ($record->type) {
                case Message::TYPE_A:
                case Message::TYPE_AAAA:
                    $binary = \inet_pton($record->data);
                    break;
                case Message::TYPE_CNAME:
                case Message::TYPE_NS:
                case Message::TYPE_PTR:
                    $binary = $this->domainNameToBinary($record->data);
                    break;
                case Message::TYPE_TXT:
                case Message::TYPE_SPF:
                    $binary = $this->textsToBinary($record->data);
                    break;
                case Message::TYPE_MX:
                    $binary = \pack(
                        'n',
                        $record->data['priority']
                    );
                    $binary .= $this->domainNameToBinary($record->data['target']);
                    break;
                case Message::TYPE_SRV:
                    $binary = \pack(
                        'n*',
                        $record->data['priority'],
                        $record->data['weight'],
                        $record->data['port']
                    );
                    $binary .= $this->domainNameToBinary($record->data['target']);
                    break;
                case Message::TYPE_SOA:
                    $binary  = $this->domainNameToBinary($record->data['mname']);
                    $binary .= $this->domainNameToBinary($record->data['rname']);
                    $binary .= \pack(
                        'N*',
                        $record->data['serial'],
                        $record->data['refresh'],
                        $record->data['retry'],
                        $record->data['expire'],
                        $record->data['minimum']
                    );
                    break;
                case Message::TYPE_CAA:
                    $binary = \pack(
                        'C*',
                        $record->data['flag'],
                        \strlen($record->data['tag'])
                    );
                    $binary .= $record->data['tag'];
                    $binary .= $record->data['value'];
                    break;
                case Message::TYPE_SSHFP:
                    $binary = \pack(
                        'CCH*',
                        $record->data['algorithm'],
                        $record->data['type'],
                        $record->data['fingerprint']
                    );
                    break;
                case Message::TYPE_OPT:
                    $binary = '';
                    foreach ($record->data as $opt => $value) {
                        if ($opt === Message::OPT_TCP_KEEPALIVE && $value !== null) {
                            $value = \pack('n', round($value * 10));
                        }
                        $binary .= \pack('n*', $opt, \strlen($value)) . $value;
                    }
                    break;
                default:
                    // RDATA is already stored as binary value for unknown record types
                    $binary = $record->data;
            }

$data .= $this->domainNameToBinary($record->name);
            $data .= \pack('nnNn', $record->type, $record->class, $record->ttl, \strlen($binary));
            $data .= $binary;
        }

return $data;
    }

/**
     * @param string[] $texts
     * @return string
     */
    private function textsToBinary(array $texts)
    {
        $data = '';
        foreach ($texts as $text) {
            $data .= \chr(\strlen($text)) . $text;
        }
        return $data;
    }

/**
     * @param string $host
     * @return string
     */
    private function domainNameToBinary($host)
    {
        if ($host === '') {
            return "\0";
        }

// break up domain name at each dot that is not preceeded by a backslash (escaped notation)
        return $this->textsToBinary(
            \array_map(
                'stripcslashes',
                \preg_split(
                    '/(?<!\\\\)\./',
                    $host . '.'
                )
            )
        );
    }
}

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