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| 1 | <?php |
| 2 | namespace Apie\FtpServer\Commands; |
| 3 | |
| 4 | use Apie\Core\Context\ApieContext; |
| 5 | use Apie\FtpServer\Factories\ServerFactoryInterface; |
| 6 | use Apie\FtpServer\Factories\SimpleFtpServerFactory; |
| 7 | use Apie\FtpServer\FtpConstants; |
| 8 | use Apie\FtpServer\Transfers\PortTransfer; |
| 9 | use Apie\FtpServer\Transfers\TransferInterface; |
| 10 | use React\Socket\ConnectionInterface; |
| 11 | |
| 12 | class EprtCommand implements CommandInterface |
| 13 | { |
| 14 | public function run(ApieContext $apieContext, string $arg = ''): ApieContext |
| 15 | { |
| 16 | $conn = $apieContext->getContext(ConnectionInterface::class); |
| 17 | $factory = $apieContext->getContext(ServerFactoryInterface::class, false) ?? new SimpleFtpServerFactory(); |
| 18 | |
| 19 | // EPRT format: |af|host|port| |
| 20 | // The delimiter is the first character. |
| 21 | if ($arg === '') { |
| 22 | $conn->write("501 Syntax error in parameters or arguments\r\n"); |
| 23 | return $apieContext; |
| 24 | } |
| 25 | |
| 26 | $delim = $arg[0]; |
| 27 | $parts = explode($delim, $arg); |
| 28 | |
| 29 | if (count($parts) !== 5) { |
| 30 | $conn->write("501 Syntax error in parameters or arguments\r\n"); |
| 31 | return $apieContext; |
| 32 | } |
| 33 | |
| 34 | [$empty, $af, $host, $port, $empty2] = $parts; |
| 35 | |
| 36 | // Only IPv4 supported |
| 37 | if ($af !== '1') { |
| 38 | $conn->write("522 Network protocol not supported (IPv6 not available)\r\n"); |
| 39 | return $apieContext; |
| 40 | } |
| 41 | |
| 42 | if (!filter_var($host, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) { |
| 43 | $conn->write("501 Invalid IP address\r\n"); |
| 44 | return $apieContext; |
| 45 | } |
| 46 | |
| 47 | $port = (int)$port; |
| 48 | if ($port <= 0 || $port > 65535) { |
| 49 | $conn->write("501 Invalid port number\r\n"); |
| 50 | return $apieContext; |
| 51 | } |
| 52 | |
| 53 | $transfer = new PortTransfer($factory->createConnector(), $host, $port); |
| 54 | $transfer->connectOnly()->then( |
| 55 | function() use ($conn) { |
| 56 | $conn->write("200 EPRT command successful.\r\n"); |
| 57 | }, |
| 58 | function (\Throwable $error) use ($conn) { |
| 59 | error_log($error->getMessage()); |
| 60 | $conn->write("425 Can't open data connection.\r\n"); |
| 61 | } |
| 62 | ); |
| 63 | |
| 64 | return $apieContext |
| 65 | ->withContext(FtpConstants::IP, $host) |
| 66 | ->withContext(FtpConstants::PORT, $port) |
| 67 | ->withContext(TransferInterface::class, $transfer); |
| 68 | } |
| 69 | } |