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144 lines
3.8 KiB
144 lines
3.8 KiB
<?php
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declare(strict_types=1);
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/**
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* @author Pavel Djundik
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*
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* @see https://xpaw.me
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* @see https://github.com/xPaw/PHP-Source-Query
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*
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* @license GNU Lesser General Public License, version 2.1
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*
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* @internal
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*/
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namespace xPaw\SourceQuery\Rcon;
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use xPaw\SourceQuery\Buffer;
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use xPaw\SourceQuery\Exception\AuthenticationException;
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use xPaw\SourceQuery\Exception\InvalidPacketException;
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use xPaw\SourceQuery\Socket\SocketInterface;
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use xPaw\SourceQuery\SourceQuery;
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final class GoldSourceRcon extends AbstractRcon
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{
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/**
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* Points to socket class.
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*/
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private SocketInterface $socket;
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private string $rconPassword = '';
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private string $rconChallenge = '';
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public function __construct(SocketInterface $socket)
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{
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$this->socket = $socket;
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}
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/**
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* Open.
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*/
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public function open(): void
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{
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}
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/**
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* Close.
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*/
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public function close(): void
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{
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$this->rconChallenge = '';
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$this->rconPassword = '';
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}
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/**
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* @throws AuthenticationException
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*/
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public function authorize(string $password): void
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{
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$this->rconPassword = $password;
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$this->write(null, 'challenge rcon');
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$buffer = $this->socket->read();
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if ('challenge rcon' !== $buffer->get(14)) {
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throw new AuthenticationException('Failed to get RCON challenge.', AuthenticationException::BAD_PASSWORD);
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}
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$this->rconChallenge = trim($buffer->get());
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}
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/**
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* @throws AuthenticationException
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* @throws InvalidPacketException
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*/
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public function command(string $command): string
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{
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if (!$this->rconChallenge) {
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throw new AuthenticationException('Tried to execute a RCON command before successful authorization.', AuthenticationException::BAD_PASSWORD);
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}
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$this->write(null, 'rcon ' . $this->rconChallenge . ' "' . $this->rconPassword . '" ' . $command . "\0");
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$buffer = $this->read();
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return $buffer->get();
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}
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/**
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* @throws AuthenticationException
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* @throws InvalidPacketException
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*/
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protected function read(): Buffer
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{
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// GoldSource RCON has same structure as Query.
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$buffer = $this->socket->read();
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$stringBuffer = '';
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// There is no identifier of the end, so we just need to continue reading.
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do {
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$readMore = !$buffer->isEmpty();
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if ($readMore) {
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if (SourceQuery::S2A_RCON !== $buffer->getByte()) {
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throw new InvalidPacketException('Invalid rcon response.', InvalidPacketException::PACKET_HEADER_MISMATCH);
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}
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$packet = $buffer->get();
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$stringBuffer .= $packet;
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//$stringBuffer .= SubStr( $packet, 0, -2 );
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// Let's assume if this packet is not long enough, there are no more after this one.
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$readMore = strlen($packet) > 1000; // use 1300?
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if ($readMore) {
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$buffer = $this->socket->read();
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}
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}
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} while ($readMore);
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$trimmed = trim($stringBuffer);
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if ('Bad rcon_password.' === $trimmed) {
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throw new AuthenticationException($trimmed, AuthenticationException::BAD_PASSWORD);
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}
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if ('You have been banned from this server.' === $trimmed) {
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throw new AuthenticationException($trimmed, AuthenticationException::BANNED);
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}
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$buffer->set($trimmed);
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return $buffer;
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}
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protected function write(?int $header, string $string = ''): bool
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{
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$command = pack('cccca*', 0xFF, 0xFF, 0xFF, 0xFF, $string);
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$length = strlen($command);
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return $length === fwrite($this->socket->getSocket(), $command, $length);
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}
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}
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