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<?php |
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namespace SamIT\Proxy; |
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use Evenement\EventEmitterInterface; |
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use Evenement\EventEmitterTrait; |
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use React\Promise\Promise; |
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use React\Socket\Connection; |
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use React\Socket\ConnectionInterface; |
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use React\Socket\ServerInterface; |
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use React\SocketClient\TcpConnector; |
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use React\Stream\Stream; |
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/** |
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* Class Forwarder |
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* Implements a connection where the remote end thinks it is talking to another server. |
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* @package SamIT\Proxy |
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*/ |
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class Forwarder implements EventEmitterInterface |
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{ |
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use EventEmitterTrait; |
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protected $connector; |
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public function __construct(TcpConnector $connector) |
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{ |
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$this->connector = $connector; |
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} |
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/** |
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* Forwards a connection to the specified host / port using the proxy protocol. |
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* @param ConnectionInterface $connection |
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* @param string $forwardAddress The host to forward to |
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* @param int $forwardPort The port to forward to |
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* @return Promise |
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*/ |
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public function forward(ConnectionInterface $connection, $forwardAddress, $forwardPort, $protocolVersion = 2) |
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{ |
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if ($connection instanceof PortConnection) { |
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$sourceAddress = $connection->getSourceAddress(); |
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$sourcePort = $connection->getSourcePort(); |
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$targetAddress = $connection->getTargetAddress(); |
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$targetPort = $connection->getTargetPort(); |
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} elseif ($connection instanceof Connection) { |
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list($sourceAddress, $sourcePort) = explode(':', stream_socket_get_name($connection->stream, true)); |
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list($targetAddress, $targetPort) = explode(':', stream_socket_get_name($connection->stream, false)); |
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} else { |
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throw new \InvalidArgumentException("This connection type is not supported."); |
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} |
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$connection->pause(); |
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$header = Header::createForward4($sourceAddress, $sourcePort, $targetAddress, $targetPort, $protocolVersion); |
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/** @var Promise $promise */ |
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$promise = $this->connector->create($forwardAddress, $forwardPort); |
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return $promise |
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->then(function(Stream $forwardedConnection) use ( |
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$connection, $header, |
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$sourceAddress, $sourcePort, |
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$targetAddress, $targetPort |
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) { |
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$forwardedConnection->pause(); |
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$forwardedConnection->getBuffer()->once('full-drain', function() use ($connection, $forwardedConnection) { |
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$this->emit('forward', [$connection, $forwardedConnection]); |
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$connection->pipe($forwardedConnection); |
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$forwardedConnection->pipe($connection); |
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$connection->resume(); |
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$forwardedConnection->resume(); |
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}); |
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$forwardedConnection->write($header); |
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}); |
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} |
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public function forwardAll(ServerInterface $server, $forwardAddress, $forwardPort, $protocolVersion = 2) |
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{ |
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$server->on('connection', function(ConnectionInterface $connection) use ($forwardAddress, $forwardPort, $protocolVersion) { |
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$this->forward($connection, $forwardAddress, $forwardPort, $protocolVersion); |
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}); |
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} |
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} |
SAM-IT /
php-proxy-protocol
