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| 1 | <?php declare(strict_types=1); |
| 2 | |
| 3 | /** |
| 4 | * Clansuite Server Query |
| 5 | * |
| 6 | * SPDX-FileCopyrightText: 2003-2025 Jens A. Koch |
| 7 | * SPDX-License-Identifier: MIT |
| 8 | * |
| 9 | * For the full copyright and license information, please view |
| 10 | * the LICENSE file that was distributed with this source code. |
| 11 | */ |
| 12 | |
| 13 | namespace Clansuite\ServerQuery\ServerProtocols; |
| 14 | |
| 15 | use function is_array; |
| 16 | use function is_float; |
| 17 | use function is_int; |
| 18 | use function is_string; |
| 19 | use function pack; |
| 20 | use function strlen; |
| 21 | use function substr; |
| 22 | use function unpack; |
| 23 | use Clansuite\ServerQuery\CSQuery; |
| 24 | use Override; |
| 25 | |
| 26 | /** |
| 27 | * SQP (Server Query Protocol) implementation. |
| 28 | * |
| 29 | * This is based on Unity Technologies' SQP protocol. |
| 30 | * Used for querying Unity-based game servers, like TF2E, Unturned, etc. |
| 31 | * |
| 32 | * @see https://docs.unity.com/ugs/en-us/manual/game-server-hosting/manual/concepts/sqp |
| 33 | */ |
| 34 | class SQP extends CSQuery |
| 35 | { |
| 36 | /** |
| 37 | * SQP constants. |
| 38 | */ |
| 39 | public const QueryRequestType = 0x00; |
| 40 | |
| 41 | public const QueryResponseType = 0x00; |
| 42 | public const ChallengeRequestType = 0x01; |
| 43 | public const ChallengeResponseType = 0x01; |
| 44 | public const Version = 1; |
| 45 | public const DefaultMaxPacketSize = 1400; |
| 46 | |
| 47 | // Chunk types |
| 48 | public const ServerInfo = 0x01; |
| 49 | public const ServerRules = 0x02; |
| 50 | public const PlayerInfo = 0x04; |
| 51 | public const TeamInfo = 0x08; |
| 52 | public const Metrics = 0x10; |
| 53 | |
| 54 | /** |
| 55 | * Protocol name. |
| 56 | */ |
| 57 | public string $name = 'SQP'; |
| 58 | |
| 59 | /** |
| 60 | * Protocol identifier. |
| 61 | */ |
| 62 | public string $protocol = 'SQP'; |
| 63 | |
| 64 | /** |
| 65 | * List of supported games. |
| 66 | * |
| 67 | * @var array<string> |
| 68 | */ |
| 69 | public array $supportedGames = ['Unity']; |
| 70 | |
| 71 | /** |
| 72 | * Challenge ID. |
| 73 | */ |
| 74 | private int $challengeID = 0; |
| 75 | |
| 76 | /** |
| 77 | * Constructor. |
| 78 | */ |
| 79 | public function __construct(string $address, int $queryport) |
| 80 | { |
| 81 | parent::__construct(); |
| 82 | $this->address = $address; |
| 83 | $this->queryport = $queryport; |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * query_server method. |
| 88 | */ |
| 89 | #[Override] |
| 90 | public function query_server(bool $getPlayers = true, bool $getRules = true): bool |
| 91 | { |
| 92 | if ($this->online) { |
| 93 | $this->reset(); |
| 94 | } |
| 95 | |
| 96 | $address = (string) $this->address; |
| 97 | $port = (int) $this->queryport; |
| 98 | |
| 99 | // Get challenge |
| 100 | if (!$this->getChallenge()) { |
| 101 | return false; |
| 102 | } |
| 103 | |
| 104 | // Build requested chunks |
| 105 | $requestedChunks = self::ServerInfo; |
| 106 | |
| 107 | if ($getRules) { |
| 108 | $requestedChunks |= self::ServerRules; |
| 109 | } |
| 110 | |
| 111 | if ($getPlayers) { |
| 112 | $requestedChunks |= self::PlayerInfo; |
| 113 | } |
| 114 | |
| 115 | // Send query |
| 116 | $queryPacket = $this->buildQueryPacket($requestedChunks); |
| 117 | |
| 118 | if (($result = $this->sendCommand($address, $port, $queryPacket)) === '' || ($result = $this->sendCommand($address, $port, $queryPacket)) === '0' || ($result = $this->sendCommand($address, $port, $queryPacket)) === false) { |
| 119 | return false; |
| 120 | } |
| 121 | |
| 122 | // Parse response |
| 123 | return $this->parseResponse($result, $requestedChunks); |
| 124 | } |
| 125 | |
| 126 | private function getChallenge(): bool |
| 127 | { |
| 128 | $address = (string) $this->address; |
| 129 | $port = (int) $this->queryport; |
| 130 | |
| 131 | $challengePacket = pack('C', self::ChallengeRequestType); |
| 132 | |
| 133 | if (($result = $this->sendCommand((string) $this->address, (int) $this->queryport, $challengePacket)) === '' || ($result = $this->sendCommand((string) $this->address, (int) $this->queryport, $challengePacket)) === '0' || ($result = $this->sendCommand((string) $this->address, (int) $this->queryport, $challengePacket)) === false) { |
| 134 | return false; |
| 135 | } |
| 136 | |
| 137 | if (strlen($result) < 5) { |
| 138 | $this->errstr = 'Invalid challenge response'; |
| 139 | |
| 140 | return false; |
| 141 | } |
| 142 | |
| 143 | $data = @unpack('Ctype/Nchallenge', $result); |
| 144 | |
| 145 | if (!is_array($data) || !isset($data['type']) || !isset($data['challenge']) || !is_int($data['type']) || !is_int($data['challenge'])) { |
| 146 | $this->errstr = 'Invalid challenge response'; |
| 147 | |
| 148 | return false; |
| 149 | } |
| 150 | |
| 151 | if ($data['type'] !== self::ChallengeResponseType) { |
| 152 | $this->errstr = 'Invalid challenge response type'; |
| 153 | |
| 154 | return false; |
| 155 | } |
| 156 | |
| 157 | $this->challengeID = $data['challenge']; |
| 158 | |
| 159 | return true; |
| 160 | } |
| 161 | |
| 162 | private function buildQueryPacket(int $requestedChunks): string |
| 163 | { |
| 164 | return pack( |
| 165 | 'CNNC', |
| 166 | self::QueryRequestType, |
| 167 | $this->challengeID, |
| 168 | self::Version, |
| 169 | $requestedChunks, |
| 170 | ); |
| 171 | } |
| 172 | |
| 173 | private function parseResponse(string $data, int $requestedChunks): bool |
| 174 | { |
| 175 | $pos = 0; |
| 176 | $len = strlen($data); |
| 177 | $tmp = null; |
| 178 | |
| 179 | // Read header |
| 180 | if (1 > $len) { |
| 181 | return false; |
| 182 | } |
| 183 | $tmp = @unpack('C', substr($data, $pos, 1)); |
| 184 | |
| 185 | if (!is_array($tmp) || !isset($tmp[1])) { |
| 186 | return false; |
| 187 | } |
| 188 | $pktType = $tmp[1]; |
| 189 | $pos++; |
| 190 | |
| 191 | if ($pktType !== self::QueryResponseType) { |
| 192 | $this->errstr = 'Invalid response type'; |
| 193 | |
| 194 | return false; |
| 195 | } |
| 196 | |
| 197 | // Validate challenge |
| 198 | if ($pos + 4 > $len) { |
| 199 | return false; |
| 200 | } |
| 201 | $tmp = @unpack('N', substr($data, $pos, 4)); |
| 202 | |
| 203 | if (!is_array($tmp) || !isset($tmp[1])) { |
| 204 | return false; |
| 205 | } |
| 206 | $challenge = $tmp[1]; |
| 207 | $pos += 4; |
| 208 | |
| 209 | if ($challenge !== $this->challengeID) { |
| 210 | $this->errstr = 'Challenge mismatch'; |
| 211 | |
| 212 | return false; |
| 213 | } |
| 214 | |
| 215 | // Version |
| 216 | if ($pos + 2 > $len) { |
| 217 | return false; |
| 218 | } |
| 219 | $tmp = @unpack('n', substr($data, $pos, 2)); |
| 220 | |
| 221 | if (!is_array($tmp) || !isset($tmp[1])) { |
| 222 | return false; |
| 223 | } |
| 224 | unset($tmp); // Currently unused |
| 225 | $pos += 2; |
| 226 | |
| 227 | // Packet info (assuming single packet for simplicity) |
| 228 | if ($pos + 4 > $len) { |
| 229 | return false; |
| 230 | } |
| 231 | $tmp = @unpack('C', substr($data, $pos, 1)); |
| 232 | |
| 233 | if (!is_array($tmp) || !isset($tmp[1])) { |
| 234 | return false; |
| 235 | } |
| 236 | $curPkt = $tmp[1]; |
| 237 | $pos++; |
| 238 | $tmp = @unpack('C', substr($data, $pos, 1)); |
| 239 | |
| 240 | if (!is_array($tmp) || !isset($tmp[1])) { |
| 241 | return false; |
| 242 | } |
| 243 | $lastPkt = $tmp[1]; |
| 244 | $pos++; |
| 245 | $tmp = @unpack('n', substr($data, $pos, 2)); |
| 246 | |
| 247 | if (!is_array($tmp) || !isset($tmp[1])) { |
| 248 | return false; |
| 249 | } |
| 250 | $pktLen = $tmp[1]; |
| 251 | $pos += 2; |
| 252 | |
| 253 | if ($curPkt > $lastPkt) { |
| 254 | $this->errstr = 'Invalid packet sequence'; |
| 255 | |
| 256 | return false; |
| 257 | } |
| 258 | |
| 259 | // Parse chunks |
| 260 | $remaining = $pktLen; |
| 261 | |
| 262 | if (($requestedChunks & self::ServerInfo) !== 0) { |
| 263 | $bytesRead = $this->parseServerInfo($data, $pos); |
| 264 | |
| 265 | if ($bytesRead === false) { |
| 266 | return false; |
| 267 | } |
| 268 | $pos += $bytesRead; |
| 269 | $remaining -= $bytesRead; |
| 270 | } |
| 271 | |
| 272 | if (($requestedChunks & self::ServerRules) !== 0) { |
| 273 | $bytesRead = $this->parseServerRules($data, $pos); |
| 274 | |
| 275 | if ($bytesRead === false) { |
| 276 | return false; |
| 277 | } |
| 278 | $pos += $bytesRead; |
| 279 | $remaining -= $bytesRead; |
| 280 | } |
| 281 | |
| 282 | if (($requestedChunks & self::PlayerInfo) !== 0) { |
| 283 | $bytesRead = $this->parsePlayerInfo($data, $pos); |
| 284 | |
| 285 | if ($bytesRead === false) { |
| 286 | return false; |
| 287 | } |
| 288 | $pos += $bytesRead; |
| 289 | $remaining -= $bytesRead; |
| 290 | } |
| 291 | |
| 292 | // Skip remaining bytes |
| 293 | $this->online = true; |
| 294 | |
| 295 | return true; |
| 296 | } |
| 297 | |
| 298 | private function parseServerInfo(string $data, int $pos): false|int |
| 299 | { |
| 300 | $startPos = $pos; |
| 301 | $tmp = null; |
| 302 | |
| 303 | if ($pos + 4 > strlen($data)) { |
| 304 | return false; |
| 305 | } |
| 306 | $tmp = @unpack('N', substr($data, $pos, 4)); |
| 307 | |
| 308 | if (!is_array($tmp) || !isset($tmp[1])) { |
| 309 | return false; |
| 310 | } |
| 311 | $this->challengeID = $tmp[1]; |
| 312 | $pos += 4; |
| 313 | |
| 314 | if ($pos + 2 > strlen($data)) { |
| 315 | return false; |
| 316 | } |
| 317 | $tmp = @unpack('n', substr($data, $pos, 2)); |
| 318 | |
| 319 | if (!is_array($tmp) || !isset($tmp[1])) { |
| 320 | return false; |
| 321 | } |
| 322 | $this->numplayers = $tmp[1]; |
| 323 | $pos += 2; |
| 324 | |
| 325 | if ($pos + 2 > strlen($data)) { |
| 326 | return false; |
| 327 | } |
| 328 | $tmp = @unpack('n', substr($data, $pos, 2)); |
| 329 | |
| 330 | if (!is_array($tmp) || !isset($tmp[1])) { |
| 331 | return false; |
| 332 | } |
| 333 | $this->maxplayers = $tmp[1]; |
| 334 | $pos += 2; |
| 335 | |
| 336 | $this->servertitle = $this->readString($data, $pos); |
| 337 | $this->gametype = $this->readString($data, $pos); |
| 338 | $this->readString($data, $pos); |
| 339 | $this->mapname = $this->readString($data, $pos); |
| 340 | |
| 341 | if ($pos + 2 > strlen($data)) { |
| 342 | return false; |
| 343 | } |
| 344 | $tmp = @unpack('n', substr($data, $pos, 2)); |
| 345 | |
| 346 | if (!is_array($tmp) || !isset($tmp[1])) { |
| 347 | return false; |
| 348 | } |
| 349 | $this->hostport = $tmp[1]; |
| 350 | $pos += 2; |
| 351 | |
| 352 | return $pos - $startPos; |
| 353 | } |
| 354 | |
| 355 | private function parseServerRules(string $data, int &$pos): false|int |
| 356 | { |
| 357 | $startPos = $pos; |
| 358 | $tmp = null; |
| 359 | |
| 360 | if ($pos + 4 > strlen($data)) { |
| 361 | return false; |
| 362 | } |
| 363 | $tmp = @unpack('N', substr($data, $pos, 4)); |
| 364 | |
| 365 | if (!is_array($tmp) || !isset($tmp[1])) { |
| 366 | return false; |
| 367 | } |
| 368 | $chunkLen = $tmp[1]; |
| 369 | $pos += 4; |
| 370 | |
| 371 | $endPos = $startPos + 4 + $chunkLen; |
| 372 | |
| 373 | while ($pos < $endPos) { |
| 374 | $key = $this->readString($data, $pos); |
| 375 | $value = $this->readString($data, $pos); |
| 376 | $this->rules[$key] = $value; |
| 377 | } |
| 378 | |
| 379 | return $pos - $startPos; |
| 380 | } |
| 381 | |
| 382 | private function parsePlayerInfo(string $data, int &$pos): false|int |
| 383 | { |
| 384 | $startPos = $pos; |
| 385 | $tmp = null; |
| 386 | |
| 387 | if ($pos + 4 > strlen($data)) { |
| 388 | return false; |
| 389 | } |
| 390 | $tmp = @unpack('N', substr($data, $pos, 4)); |
| 391 | |
| 392 | if (!is_array($tmp) || !isset($tmp[1])) { |
| 393 | return false; |
| 394 | } |
| 395 | $chunkLen = $tmp[1]; |
| 396 | $pos += 4; |
| 397 | |
| 398 | if ($pos + 2 > strlen($data)) { |
| 399 | return false; |
| 400 | } |
| 401 | $tmp = @unpack('n', substr($data, $pos, 2)); |
| 402 | |
| 403 | if (!is_array($tmp) || !isset($tmp[1])) { |
| 404 | return false; |
| 405 | } |
| 406 | $playerCount = $tmp[1]; |
| 407 | $pos += 2; |
| 408 | |
| 409 | if ($playerCount === 0) { |
| 410 | return $pos - $startPos + $chunkLen - 6; // Skip chunk |
| 411 | } |
| 412 | |
| 413 | // Read header |
| 414 | $header = $this->readInfoHeader($data, $pos); |
| 415 | |
| 416 | // Read players |
| 417 | for ($i = 0; $i < $playerCount; $i++) { |
| 418 | $player = []; |
| 419 | |
| 420 | foreach ($header as $field) { |
| 421 | $type = $field['type'] ?? 0; |
| 422 | $name = $field['name'] ?? ''; |
| 423 | |
| 424 | if (is_int($type) && is_string($name)) { |
| 425 | $value = $this->readDynamicValue($data, $pos, $type); |
| 426 | $player[$name] = $value; |
| 427 | } |
| 428 | } |
| 429 | $this->players[] = $player; |
| 430 | } |
| 431 | |
| 432 | return $pos - $startPos; |
| 433 | } |
| 434 | |
| 435 | /** |
| 436 | * @return array<array<string, mixed>> |
| 437 | */ |
| 438 | private function readInfoHeader(string $data, int &$pos): array |
| 439 | { |
| 440 | $tmp = null; |
| 441 | $tmp = @unpack('C', substr($data, $pos, 1)); |
| 442 | $pos++; |
| 443 | $fieldCount = 0; |
| 444 | |
| 445 | if (is_array($tmp) && isset($tmp[1])) { |
| 446 | $fieldCount = $tmp[1]; |
| 447 | } |
| 448 | $header = []; |
| 449 | |
| 450 | for ($i = 0; $i < $fieldCount; $i++) { |
| 451 | $name = $this->readString($data, $pos); |
| 452 | $tmp = @unpack('C', substr($data, $pos, 1)); |
| 453 | $pos++; |
| 454 | $type = 0; |
| 455 | |
| 456 | if (is_array($tmp) && isset($tmp[1])) { |
| 457 | $type = $tmp[1]; |
| 458 | } |
| 459 | $header[] = ['name' => $name, 'type' => $type]; |
| 460 | } |
| 461 | |
| 462 | return $header; |
| 463 | } |
| 464 | |
| 465 | private function readDynamicValue(string $data, int &$pos, int $type): null|float|int|string |
| 466 | { |
| 467 | $tmp = null; |
| 468 | |
| 469 | switch ($type) { |
| 470 | case 0: // String |
| 471 | return $this->readString($data, $pos); |
| 472 | |
| 473 | case 1: // Uint8 |
| 474 | $tmp = @unpack('C', $data[$pos] ?? "\x00"); |
| 475 | $pos++; |
| 476 | $val = 0; |
| 477 | |
| 478 | if (is_array($tmp) && isset($tmp[1]) && is_int($tmp[1])) { |
| 479 | $val = $tmp[1]; |
| 480 | } |
| 481 | |
| 482 | return $val; |
| 483 | |
| 484 | case 2: // Uint16 |
| 485 | $tmp = @unpack('n', substr($data, $pos, 2)); |
| 486 | $pos += 2; |
| 487 | $val = 0; |
| 488 | |
| 489 | if (is_array($tmp) && isset($tmp[1]) && is_int($tmp[1])) { |
| 490 | $val = $tmp[1]; |
| 491 | } |
| 492 | |
| 493 | return $val; |
| 494 | |
| 495 | case 3: // Uint32 |
| 496 | $tmp = @unpack('N', substr($data, $pos, 4)); |
| 497 | $pos += 4; |
| 498 | $val = 0; |
| 499 | |
| 500 | if (is_array($tmp) && isset($tmp[1]) && is_int($tmp[1])) { |
| 501 | $val = $tmp[1]; |
| 502 | } |
| 503 | |
| 504 | return $val; |
| 505 | |
| 506 | case 4: // Uint64 |
| 507 | $tmp = @unpack('J', substr($data, $pos, 8)); |
| 508 | $pos += 8; |
| 509 | $val = 0; |
| 510 | |
| 511 | if (is_array($tmp) && isset($tmp[1]) && is_int($tmp[1])) { |
| 512 | $val = $tmp[1]; |
| 513 | } |
| 514 | |
| 515 | return $val; |
| 516 | |
| 517 | case 5: // Int8 |
| 518 | $tmp = @unpack('c', $data[$pos] ?? "\x00"); |
| 519 | $pos++; |
| 520 | $val = 0; |
| 521 | |
| 522 | if (is_array($tmp) && isset($tmp[1]) && is_int($tmp[1])) { |
| 523 | $val = $tmp[1]; |
| 524 | } |
| 525 | |
| 526 | return $val; |
| 527 | |
| 528 | case 6: // Int16 |
| 529 | $tmp = @unpack('s', substr($data, $pos, 2)); |
| 530 | $pos += 2; |
| 531 | $val = 0; |
| 532 | |
| 533 | if (is_array($tmp) && isset($tmp[1]) && is_int($tmp[1])) { |
| 534 | $val = $tmp[1]; |
| 535 | } |
| 536 | |
| 537 | return $val; |
| 538 | |
| 539 | case 7: // Int32 |
| 540 | $tmp = @unpack('l', substr($data, $pos, 4)); |
| 541 | $pos += 4; |
| 542 | $val = 0; |
| 543 | |
| 544 | if (is_array($tmp) && isset($tmp[1]) && is_int($tmp[1])) { |
| 545 | $val = $tmp[1]; |
| 546 | } |
| 547 | |
| 548 | return $val; |
| 549 | |
| 550 | case 8: // Int64 |
| 551 | $tmp = @unpack('q', substr($data, $pos, 8)); |
| 552 | $pos += 8; |
| 553 | $val = 0; |
| 554 | |
| 555 | if (is_array($tmp) && isset($tmp[1]) && is_int($tmp[1])) { |
| 556 | $val = $tmp[1]; |
| 557 | } |
| 558 | |
| 559 | return $val; |
| 560 | |
| 561 | case 9: // Float32 |
| 562 | $tmp = @unpack('f', substr($data, $pos, 4)); |
| 563 | $pos += 4; |
| 564 | $val = 0.0; |
| 565 | |
| 566 | if (is_array($tmp) && isset($tmp[1]) && is_float($tmp[1])) { |
| 567 | $val = $tmp[1]; |
| 568 | } |
| 569 | |
| 570 | return $val; |
| 571 | |
| 572 | case 10: // Float64 |
| 573 | $tmp = @unpack('d', substr($data, $pos, 8)); |
| 574 | $pos += 8; |
| 575 | $val = 0.0; |
| 576 | |
| 577 | if (is_array($tmp) && isset($tmp[1]) && is_float($tmp[1])) { |
| 578 | $val = $tmp[1]; |
| 579 | } |
| 580 | |
| 581 | return $val; |
| 582 | |
| 583 | default: |
| 584 | return null; |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | private function readString(string $data, int &$pos): string |
| 589 | { |
| 590 | $start = $pos; |
| 591 | |
| 592 | while ($pos < strlen($data) && $data[$pos] !== "\x00") { |
| 593 | $pos++; |
| 594 | } |
| 595 | $str = substr($data, $start, $pos - $start); |
| 596 | $pos++; // Skip null terminator |
| 597 | |
| 598 | return $str; |
| 599 | } |
| 600 | } |