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352 lines
9.9 KiB
352 lines
9.9 KiB
<?php
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declare(strict_types=1);
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/**
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* This class provides the public interface to the PHP-Source-Query library.
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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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namespace xPaw\SourceQuery;
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use xPaw\SourceQuery\Exception\AuthenticationException;
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use xPaw\SourceQuery\Exception\InvalidArgumentException;
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use xPaw\SourceQuery\Exception\InvalidPacketException;
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use xPaw\SourceQuery\Exception\SocketException;
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use xPaw\SourceQuery\QueryResponse\GoldSourceInfoQueryResponse;
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use xPaw\SourceQuery\QueryResponse\PlayersQueryResponse;
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use xPaw\SourceQuery\QueryResponse\RulesQueryResponse;
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use xPaw\SourceQuery\QueryResponse\SourceInfoQueryResponse;
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use xPaw\SourceQuery\Rcon\RconInterface;
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use xPaw\SourceQuery\Socket\SocketInterface;
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final class SourceQuery
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{
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/**
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* Packets sent.
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*/
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private const A2A_PING = 0x69;
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private const A2S_INFO = 0x54;
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private const A2S_PLAYER = 0x55;
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private const A2S_RULES = 0x56;
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private const A2S_SERVERQUERY_GETCHALLENGE = 0x57;
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/**
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* Packets received.
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*/
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private const A2A_ACK = 0x6A;
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private const S2C_CHALLENGE = 0x41;
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private const S2A_INFO_SRC = 0x49;
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private const S2A_INFO_OLD = 0x6D; // Old GoldSource, HLTV uses it (actually called S2A_INFO_DETAILED).
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private const S2A_PLAYER = 0x44;
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private const S2A_RULES = 0x45;
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public const S2A_RCON = 0x6C;
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/**
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* Source rcon sent.
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*/
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public const SERVERDATA_REQUESTVALUE = 0;
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public const SERVERDATA_EXECCOMMAND = 2;
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public const SERVERDATA_AUTH = 3;
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/**
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* Source rcon received.
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*/
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public const SERVERDATA_RESPONSE_VALUE = 0;
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public const SERVERDATA_AUTH_RESPONSE = 2;
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/**
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* Points to rcon class.
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*/
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private RconInterface $rcon;
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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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/**
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* True if connection is open, false if not.
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*/
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private bool $connected = false;
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/**
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* True if we have opened an Rcon connection, false if not.
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*/
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private bool $rconConnected = false;
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/**
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* Contains challenge.
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*/
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private string $challenge = '';
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/**
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* Use old method for getting challenge number.
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*/
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private bool $useOldGetChallengeMethod = false;
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public function __construct(SocketInterface $socket, RconInterface $rcon)
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{
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$this->socket = $socket;
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$this->rcon = $rcon;
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}
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/**
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* Destructor.
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*/
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public function __destruct()
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{
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$this->disconnect();
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}
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/**
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* Opens connection to server.
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*
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* @param string $address Server ip
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* @param int $port Server port
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* @param int $timeout Timeout period
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*
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* @throws InvalidArgumentException
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*/
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public function connect(string $address, int $port, int $timeout = 3): void
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{
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$this->disconnect();
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if ($timeout < 0) {
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throw new InvalidArgumentException('Timeout must be a positive integer.', InvalidArgumentException::TIMEOUT_NOT_INTEGER);
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}
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$this->socket->open($address, $port, $timeout);
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$this->connected = true;
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}
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/**
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* Closes all open connections.
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*/
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public function disconnect(): void
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{
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$this->connected = false;
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$this->rconConnected = false;
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$this->challenge = '';
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$this->socket->close();
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$this->rcon->close();
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}
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/**
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* Forces GetChallenge to use old method for challenge retrieval because some games use outdated protocol (e.g Starbound).
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*/
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public function setUseOldGetChallengeMethod(bool $value): void
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{
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$this->useOldGetChallengeMethod = $value;
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}
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/**
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* Sends ping packet to the server
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* NOTE: This may not work on some games (TF2 for example).
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*
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* @throws SocketException
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*
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* @return bool True on success, false on failure
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*/
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public function ping(): bool
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{
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if (!$this->connected) {
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throw new SocketException('Not connected.', SocketException::NOT_CONNECTED);
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}
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$this->socket->write(self::A2A_PING);
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$buffer = $this->socket->read();
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return self::A2A_ACK === $buffer->getByte();
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}
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/**
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* Get server information.
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*
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* @throws InvalidPacketException
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* @throws SocketException
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*
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* @return array Returns an array with information on success
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*/
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public function getInfo(): array
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{
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if (!$this->connected) {
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throw new SocketException('Not connected.', SocketException::NOT_CONNECTED);
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}
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if ($this->challenge) {
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$this->socket->write(self::A2S_INFO, "Source Engine Query\0" . $this->challenge);
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} else {
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$this->socket->write(self::A2S_INFO, "Source Engine Query\0");
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}
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$buffer = $this->socket->read();
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$type = $buffer->getByte();
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if (self::S2C_CHALLENGE === $type) {
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$this->challenge = $buffer->get(4);
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$this->socket->write(self::A2S_INFO, "Source Engine Query\0" . $this->challenge);
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$buffer = $this->socket->read();
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$type = $buffer->getByte();
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}
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// Old GoldSource protocol, HLTV still uses it.
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if (self::S2A_INFO_OLD === $type && EngineType::GOLDSOURCE === $this->socket->getType()) {
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return GoldSourceInfoQueryResponse::fromBuffer($buffer);
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}
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if (self::S2A_INFO_SRC !== $type) {
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throw new InvalidPacketException('GetInfo: Packet header mismatch. (0x' . dechex($type) . ')', InvalidPacketException::PACKET_HEADER_MISMATCH);
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}
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return SourceInfoQueryResponse::fromBuffer($buffer);
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}
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/**
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* Get players on the server.
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*
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* @throws InvalidPacketException
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* @throws SocketException
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*
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* @return array Returns an array with players on success
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*/
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public function getPlayers(): array
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{
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if (!$this->connected) {
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throw new SocketException('Not connected.', SocketException::NOT_CONNECTED);
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}
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$this->getChallenge(self::A2S_PLAYER, self::S2A_PLAYER);
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$this->socket->write(self::A2S_PLAYER, $this->challenge);
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$buffer = $this->socket->read(14000); // Moronic Arma 3 developers do not split their packets, so we have to read more data.
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// This violates the protocol spec, and they probably should fix it: https://developer.valvesoftware.com/wiki/Server_queries#Protocol
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$type = $buffer->getByte();
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if (self::S2A_PLAYER !== $type) {
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throw new InvalidPacketException('GetPlayers: Packet header mismatch. (0x' . dechex($type) . ')', InvalidPacketException::PACKET_HEADER_MISMATCH);
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}
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return PlayersQueryResponse::fromBuffer($buffer);
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}
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/**
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* Get rules (cvars) from the server.
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*
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* @throws InvalidPacketException
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* @throws SocketException
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*
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* @return array Returns an array with rules on success
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*/
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public function getRules(): array
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{
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if (!$this->connected) {
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throw new SocketException('Not connected.', SocketException::NOT_CONNECTED);
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}
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$this->getChallenge(self::A2S_RULES, self::S2A_RULES);
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$this->socket->write(self::A2S_RULES, $this->challenge);
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$buffer = $this->socket->read();
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$type = $buffer->getByte();
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if (self::S2A_RULES !== $type) {
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throw new InvalidPacketException('GetRules: Packet header mismatch. (0x' . dechex($type) . ')', InvalidPacketException::PACKET_HEADER_MISMATCH);
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}
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return RulesQueryResponse::fromBuffer($buffer);
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}
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/**
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* Sets rcon password, for future use in Rcon().
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*
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* @param string $password Rcon Password
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*
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* @throws AuthenticationException
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* @throws SocketException
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*/
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public function setRconPassword(string $password): void
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{
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if (!$this->connected) {
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throw new SocketException('Not connected.', SocketException::NOT_CONNECTED);
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}
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$this->rcon->open();
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$this->rcon->authorize($password);
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$this->rconConnected = true;
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}
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/**
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* Sends a command to the server for execution.
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*
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* @param string $command Command to execute
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*
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* @throws InvalidPacketException
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* @throws SocketException
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* @throws AuthenticationException
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*
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* @return string Answer from server in string
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*/
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public function rcon(string $command): string
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{
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if (!$this->connected) {
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throw new SocketException('Not connected.', SocketException::NOT_CONNECTED);
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}
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if (!$this->rconConnected) {
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throw new SocketException('You must set a RCON password before trying to execute a RCON command.', SocketException::NOT_CONNECTED);
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}
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return $this->rcon->command($command);
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}
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/**
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* Get challenge (used for players/rules packets).
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*
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* @throws InvalidPacketException
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*/
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private function getChallenge(int $header, int $expectedResult): void
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{
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if ($this->challenge) {
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return;
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}
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if ($this->useOldGetChallengeMethod) {
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$header = self::A2S_SERVERQUERY_GETCHALLENGE;
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}
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$this->socket->write($header, "\xFF\xFF\xFF\xFF");
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$buffer = $this->socket->read();
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$type = $buffer->getByte();
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switch ($type) {
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case self::S2C_CHALLENGE:
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$this->challenge = $buffer->get(4);
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return;
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case $expectedResult:
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// Goldsource (HLTV).
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return;
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case 0:
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throw new InvalidPacketException('GetChallenge: Failed to get challenge.');
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default:
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throw new InvalidPacketException('GetChallenge: Packet header mismatch. (0x' . dechex($type) . ')', InvalidPacketException::PACKET_HEADER_MISMATCH);
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}
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}
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}
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