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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 array_shift; |
| 16 | use function chr; |
| 17 | use function count; |
| 18 | use function explode; |
| 19 | use function fclose; |
| 20 | use function fread; |
| 21 | use function fsockopen; |
| 22 | use function fwrite; |
| 23 | use function in_array; |
| 24 | use function is_array; |
| 25 | use function is_numeric; |
| 26 | use function is_string; |
| 27 | use function pack; |
| 28 | use function str_contains; |
| 29 | use function str_starts_with; |
| 30 | use function stream_set_blocking; |
| 31 | use function stream_set_timeout; |
| 32 | use function strlen; |
| 33 | use function substr; |
| 34 | use function time; |
| 35 | use function unpack; |
| 36 | use Clansuite\Capture\Protocol\ProtocolInterface; |
| 37 | use Clansuite\Capture\ServerAddress; |
| 38 | use Clansuite\Capture\ServerInfo; |
| 39 | use Clansuite\ServerQuery\CSQuery; |
| 40 | use Override; |
| 41 | |
| 42 | /** |
| 43 | * Battlefield 3 / 4 / Hardline (Frostbite) Server Query Class. |
| 44 | */ |
| 45 | class Bf3 extends CSQuery implements ProtocolInterface |
| 46 | { |
| 47 | /** |
| 48 | * Real game host (may differ from query host). |
| 49 | */ |
| 50 | public ?string $gameHost = null; |
| 51 | |
| 52 | /** |
| 53 | * Real game port (may differ from query port). |
| 54 | */ |
| 55 | public ?int $gamePort = null; |
| 56 | |
| 57 | /** |
| 58 | * Protocol name. |
| 59 | */ |
| 60 | public string $name = 'Battlefield 3'; |
| 61 | |
| 62 | /** |
| 63 | * List of supported games. |
| 64 | * |
| 65 | * @var array<string> |
| 66 | */ |
| 67 | public array $supportedGames = ['Battlefield 3', 'Battlefield 4', 'Battlefield: Hardline']; |
| 68 | |
| 69 | /** |
| 70 | * Protocol identifier. |
| 71 | */ |
| 72 | public string $protocol = 'Frostbite'; |
| 73 | |
| 74 | /** |
| 75 | * Game series. |
| 76 | * |
| 77 | * @var array<string> |
| 78 | */ |
| 79 | public array $game_series_list = ['Battlefield']; |
| 80 | protected int $port_diff = 22000; |
| 81 | |
| 82 | /** |
| 83 | * Constructor. |
| 84 | */ |
| 85 | public function __construct(?string $address = null, ?int $queryport = null) |
| 86 | { |
| 87 | parent::__construct(); |
| 88 | $this->address = $address ?? ''; |
| 89 | $this->queryport = $queryport ?? 0; |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Returns a native join URI for BF4. |
| 94 | */ |
| 95 | #[Override] |
| 96 | public function getNativeJoinURI(): string |
| 97 | { |
| 98 | return 'bf4://' . $this->address . ':' . $this->hostport; |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * query_server method. |
| 103 | */ |
| 104 | #[Override] |
| 105 | public function query_server(bool $getPlayers = true, bool $getRules = true): bool |
| 106 | { |
| 107 | if ($this->online) { |
| 108 | $this->reset(); |
| 109 | } |
| 110 | |
| 111 | $queryPort = ($this->queryport ?? 0) + $this->port_diff; |
| 112 | |
| 113 | // Attempt TCP query to client_port + 22000 (BF3/BF4 convention) |
| 114 | $errno = 0; |
| 115 | $errstr = ''; |
| 116 | $address = $this->address ?? ''; |
| 117 | $fp = @fsockopen($address, $queryPort, $errno, $errstr, 5); |
| 118 | |
| 119 | if ($fp === false) { |
| 120 | $this->errstr = 'Unable to open TCP socket to BF4 query port'; |
| 121 | |
| 122 | return false; |
| 123 | } |
| 124 | stream_set_blocking($fp, true); |
| 125 | stream_set_timeout($fp, 5); |
| 126 | |
| 127 | // serverInfo |
| 128 | $info = $this->tcpQuery($fp, ['serverInfo']); |
| 129 | |
| 130 | if ($info === false) { |
| 131 | fclose($fp); |
| 132 | $this->errstr = 'No BF4 serverInfo response'; |
| 133 | |
| 134 | return false; |
| 135 | } |
| 136 | |
| 137 | // serverInfo: first element should be 'OK' |
| 138 | if (!isset($info[0]) || $info[0] !== 'OK') { |
| 139 | // not a valid response |
| 140 | fclose($fp); |
| 141 | $this->errstr = 'Invalid BF4 serverInfo response'; |
| 142 | |
| 143 | return false; |
| 144 | } |
| 145 | |
| 146 | // parse fields following node-gamedig logic |
| 147 | $st = $info[0] ?? null; |
| 148 | $this->servertitle = is_string($st) ? $st : ''; |
| 149 | |
| 150 | $np = $info[1] ?? null; |
| 151 | |
| 152 | if (is_numeric($np)) { |
| 153 | $this->numplayers = (int) $np; |
| 154 | } else { |
| 155 | $this->numplayers = 0; |
| 156 | } |
| 157 | |
| 158 | $mp = $info[2] ?? null; |
| 159 | |
| 160 | if (is_numeric($mp)) { |
| 161 | $this->maxplayers = (int) $mp; |
| 162 | } else { |
| 163 | $this->maxplayers = 0; |
| 164 | } |
| 165 | |
| 166 | $gt = $info[3] ?? null; |
| 167 | $this->gametype = is_string($gt) ? $gt : ''; |
| 168 | |
| 169 | $mn = $info[4] ?? null; |
| 170 | $this->mapname = is_string($mn) ? $mn : ''; |
| 171 | |
| 172 | $idx = 5; |
| 173 | $idx++; |
| 174 | $idx++; |
| 175 | |
| 176 | if (isset($info[$idx]) && is_numeric($info[$idx])) { |
| 177 | $teamCount = (int) $info[$idx]; |
| 178 | } else { |
| 179 | $teamCount = 0; |
| 180 | } |
| 181 | $idx++; |
| 182 | $this->playerteams = []; |
| 183 | |
| 184 | for ($i = 0; $i < $teamCount; $i++) { |
| 185 | if (isset($info[$idx]) && is_numeric($info[$idx])) { |
| 186 | $tickets = (float) $info[$idx]; |
| 187 | } else { |
| 188 | $tickets = 0.0; |
| 189 | } |
| 190 | $this->playerteams[] = ['tickets' => $tickets]; |
| 191 | $idx++; |
| 192 | } |
| 193 | |
| 194 | if (isset($info[$idx]) && is_numeric($info[$idx])) { |
| 195 | $this->rules['targetscore'] = (int) $info[$idx]; |
| 196 | } else { |
| 197 | $this->rules['targetscore'] = 0; |
| 198 | } |
| 199 | $idx++; |
| 200 | $this->rules['status'] = isset($info[$idx]) && is_string($info[$idx]) ? $info[$idx] : null; |
| 201 | $idx++; |
| 202 | |
| 203 | // optional fields (ranked, punkbuster, password, uptime, roundtime) |
| 204 | if (isset($info[$idx])) { |
| 205 | $this->rules['isRanked'] = ($info[$idx] === 'true'); |
| 206 | } |
| 207 | $idx++; |
| 208 | |
| 209 | if (isset($info[$idx])) { |
| 210 | $this->rules['punkbuster'] = ($info[$idx] === 'true'); |
| 211 | } |
| 212 | $idx++; |
| 213 | |
| 214 | if (isset($info[$idx])) { |
| 215 | $this->password = ($info[$idx] === 'true') ? 1 : 0; |
| 216 | } |
| 217 | $idx++; |
| 218 | |
| 219 | if (isset($info[$idx])) { |
| 220 | if (is_numeric($info[$idx])) { |
| 221 | $this->rules['serveruptime'] = (int) $info[$idx]; |
| 222 | } else { |
| 223 | $this->rules['serveruptime'] = 0; |
| 224 | } |
| 225 | } |
| 226 | $idx++; |
| 227 | |
| 228 | if (isset($info[$idx])) { |
| 229 | if (is_numeric($info[$idx])) { |
| 230 | $this->rules['roundTime'] = (int) $info[$idx]; |
| 231 | } else { |
| 232 | $this->rules['roundTime'] = 0; |
| 233 | } |
| 234 | } |
| 235 | $idx++; |
| 236 | |
| 237 | // try to read ip:port |
| 238 | if (isset($info[$idx]) && is_string($info[$idx]) && str_contains($info[$idx], ':')) { |
| 239 | $this->rules['ip'] = $info[$idx]; |
| 240 | $exploded = explode(':', $info[$idx]); |
| 241 | |
| 242 | /** @var array{0: string, 1: string} $exploded */ |
| 243 | $host = $exploded[0]; |
| 244 | $port = $exploded[1]; |
| 245 | $this->gameHost = $host; |
| 246 | $this->gamePort = is_numeric($port) ? (int) $port : 0; |
| 247 | $idx++; |
| 248 | } |
| 249 | |
| 250 | // version |
| 251 | $ver = $this->tcpQuery($fp, ['version']); |
| 252 | |
| 253 | if (is_array($ver) && count($ver) >= 2 && isset($ver[0]) && $ver[0] === 'OK') { |
| 254 | $this->gameversion = isset($ver[1]) && is_string($ver[1]) ? $ver[1] : ''; |
| 255 | } |
| 256 | // players |
| 257 | $players = $this->tcpQuery($fp, ['listPlayers', 'all']); |
| 258 | |
| 259 | if (is_array($players) && count($players) > 0 && ($first = array_shift($players)) === 'OK') { |
| 260 | $fieldCount = isset($players[0]) && is_numeric($players[0]) ? (int) $players[0] : 0; |
| 261 | $pos = 1; |
| 262 | |
| 263 | /** @var array<string> $fields */ |
| 264 | $fields = []; |
| 265 | |
| 266 | for ($i = 0; $i < $fieldCount; $i++, $pos++) { |
| 267 | $fields[] = isset($players[$pos]) && is_string($players[$pos]) ? $players[$pos] : ''; |
| 268 | } |
| 269 | $pos++; |
| 270 | $numplayers = isset($players[$pos - 1]) && is_numeric($players[$pos - 1]) ? (int) $players[$pos - 1] : 0; |
| 271 | $this->players = []; |
| 272 | |
| 273 | for ($i = 0; $i < $numplayers; $i++) { |
| 274 | /** @var array<string, mixed> $player */ |
| 275 | $player = []; |
| 276 | |
| 277 | foreach ($fields as $key) { |
| 278 | $val = $players[$pos] ?? null; |
| 279 | |
| 280 | // numeric fields -> cast |
| 281 | if (in_array($key, ['kills', 'deaths', 'score', 'rank', 'team', 'squad', 'ping', 'type'], true)) { |
| 282 | if (is_numeric($val)) { |
| 283 | $val = (int) $val; |
| 284 | } else { |
| 285 | $val = 0; |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | // normalize sentinel ping values (65535 and other very large values) to 0 |
| 290 | if ($key === 'ping' && is_numeric($val)) { |
| 291 | $ival = (int) $val; |
| 292 | |
| 293 | if ($ival >= 60000) { |
| 294 | $val = 0; |
| 295 | } else { |
| 296 | $val = $ival; |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | $player[$key] = $val; |
| 301 | $pos++; |
| 302 | } |
| 303 | $this->players[] = $player; |
| 304 | } |
| 305 | } |
| 306 | |
| 307 | fclose($fp); |
| 308 | |
| 309 | return true; |
| 310 | } |
| 311 | |
| 312 | /** |
| 313 | * Public helper to parse a captured binary blob (one or more BF packets). |
| 314 | * Returns structured data: serverInfoParams, serverInfo (mapped), players, rawPackets. |
| 315 | * |
| 316 | * @param string $data raw captured binary data |
| 317 | * |
| 318 | * @return array<string,mixed> |
| 319 | */ |
| 320 | public function parseCaptured(string $data): array |
| 321 | { |
| 322 | $ptr = 0; |
| 323 | $len = strlen($data); |
| 324 | |
| 325 | /** @var string[] $packets */ |
| 326 | $packets = []; |
| 327 | |
| 328 | while ($ptr + 8 <= $len) { |
| 329 | $unpacked = unpack('V', substr($data, $ptr + 4, 4)); |
| 330 | |
| 331 | if ($unpacked === false) { |
| 332 | break; |
| 333 | } |
| 334 | |
| 335 | /** @var array{1: int} $unpacked */ |
| 336 | $totalLength = $unpacked[1]; |
| 337 | |
| 338 | if ($totalLength <= 0 || ($ptr + $totalLength) > $len) { |
| 339 | break; |
| 340 | } |
| 341 | |
| 342 | $packet = substr($data, $ptr, $totalLength); |
| 343 | $params = $this->decodePacket($packet); |
| 344 | |
| 345 | if ($params !== false) { |
| 346 | $packets[] = $params; |
| 347 | } |
| 348 | $ptr += $totalLength; |
| 349 | } |
| 350 | |
| 351 | $result = [ |
| 352 | 'rawPackets' => $packets, |
| 353 | 'serverInfoParams' => null, |
| 354 | 'serverInfo' => [], |
| 355 | 'players' => [], |
| 356 | 'rules' => [], |
| 357 | ]; |
| 358 | |
| 359 | if (count($packets) === 0) { |
| 360 | return $result; |
| 361 | } |
| 362 | |
| 363 | // serverInfo is usually the first packet |
| 364 | /** @var string $si */ |
| 365 | /** @phpstan-ignore-next-line offsetAccess.notFound */ |
| 366 | $si = $packets[0]; |
| 367 | $result['serverInfoParams'] = $si; |
| 368 | |
| 369 | if ($si !== '' && str_starts_with($si, 'OK')) { |
| 370 | $info = explode("\t", $si); |
| 371 | $mapped = []; |
| 372 | $st = $info[1] ?? null; |
| 373 | $mapped['servertitle'] = $st ?? ''; |
| 374 | |
| 375 | $np = $info[2] ?? null; |
| 376 | $mapped['numplayers'] = (int) ($np ?? 0); |
| 377 | |
| 378 | $mp = $info[3] ?? null; |
| 379 | $mapped['maxplayers'] = (int) ($mp ?? 0); |
| 380 | |
| 381 | $gt = $info[4] ?? null; |
| 382 | $mapped['gametype'] = $gt ?? ''; |
| 383 | |
| 384 | $mn = $info[5] ?? null; |
| 385 | $mapped['mapname'] = is_string($mn) ? $mn : ''; |
| 386 | |
| 387 | $idx = 6; |
| 388 | $mapped['roundsplayed'] = isset($info[$idx]) && is_numeric($info[$idx]) ? (int) $info[$idx] : 0; |
| 389 | $idx++; |
| 390 | $mapped['roundstotal'] = isset($info[$idx]) && is_numeric($info[$idx]) ? (int) $info[$idx] : 0; |
| 391 | $idx++; |
| 392 | |
| 393 | $teamCount = isset($info[$idx]) && is_numeric($info[$idx]) ? (int) $info[$idx] : 0; |
| 394 | $idx++; |
| 395 | $mapped['teams'] = []; |
| 396 | |
| 397 | for ($i = 0; $i < $teamCount; $i++) { |
| 398 | $mapped['teams'][] = isset($info[$idx]) && is_numeric($info[$idx]) ? (float) $info[$idx] : 0.0; |
| 399 | $idx++; |
| 400 | } |
| 401 | |
| 402 | $mapped['targetscore'] = isset($info[$idx]) && is_numeric($info[$idx]) ? (int) $info[$idx] : 0; |
| 403 | $idx++; |
| 404 | $mapped['status'] = $info[$idx] ?? null; |
| 405 | $idx++; |
| 406 | |
| 407 | // optional flags |
| 408 | if (isset($info[$idx])) { |
| 409 | $mapped['ranked'] = ($info[$idx] === 'true'); |
| 410 | } $idx++; |
| 411 | |
| 412 | if (isset($info[$idx])) { |
| 413 | $mapped['punkbuster'] = ($info[$idx] === 'true'); |
| 414 | } $idx++; |
| 415 | |
| 416 | if (isset($info[$idx])) { |
| 417 | $mapped['password'] = ($info[$idx] === 'true'); |
| 418 | } $idx++; |
| 419 | |
| 420 | if (isset($info[$idx]) && is_numeric($info[$idx])) { |
| 421 | $mapped['uptime'] = (int) $info[$idx]; |
| 422 | } $idx++; |
| 423 | |
| 424 | if (isset($info[$idx]) && is_numeric($info[$idx])) { |
| 425 | $mapped['roundtime'] = (int) $info[$idx]; |
| 426 | } $idx++; |
| 427 | |
| 428 | if (isset($info[$idx]) && is_string($info[$idx]) && str_contains($info[$idx], ':')) { |
| 429 | $mapped['gameIpAndPort'] = $info[$idx]; |
| 430 | } |
| 431 | |
| 432 | $result['serverInfo'] = $mapped; |
| 433 | } |
| 434 | |
| 435 | // Find players packet (look for a packet that starts with OK and appears to contain fields) |
| 436 | foreach ($packets as $p) { |
| 437 | /** @var string $p */ |
| 438 | if ($p === '') { |
| 439 | continue; |
| 440 | } |
| 441 | |
| 442 | $p = explode("\t", $p); |
| 443 | |
| 444 | if (count($p) === 0) { |
| 445 | continue; |
| 446 | } |
| 447 | |
| 448 | if ($p[0] !== 'OK') { |
| 449 | continue; |
| 450 | } |
| 451 | |
| 452 | // heuristic: if packet length indicates fieldCount and fields follow |
| 453 | $pos = 1; |
| 454 | |
| 455 | if (!isset($p[$pos])) { |
| 456 | continue; |
| 457 | } |
| 458 | $fieldCount = (int) $p[$pos]; |
| 459 | $pos++; |
| 460 | |
| 461 | /** @var array<string> $fields */ |
| 462 | $fields = []; |
| 463 | |
| 464 | for ($i = 0; $i < $fieldCount; $i++, $pos++) { |
| 465 | $fields[] = $p[$pos] ?? ''; |
| 466 | } |
| 467 | |
| 468 | if (!isset($p[$pos])) { |
| 469 | continue; |
| 470 | } |
| 471 | $playerCount = (int) $p[$pos]; |
| 472 | $pos++; |
| 473 | |
| 474 | $players = []; |
| 475 | |
| 476 | for ($i = 0; $i < $playerCount; $i++) { |
| 477 | /** @var array<string, mixed> $player */ |
| 478 | $player = []; |
| 479 | |
| 480 | foreach ($fields as $f) { |
| 481 | $val = $p[$pos] ?? null; |
| 482 | $pos++; |
| 483 | |
| 484 | if ($f === 'teamId') { |
| 485 | $f = 'team'; |
| 486 | } |
| 487 | |
| 488 | if ($f === 'squadId') { |
| 489 | $f = 'squad'; |
| 490 | } |
| 491 | |
| 492 | if (in_array($f, ['kills', 'deaths', 'score', 'rank', 'team', 'squad', 'ping', 'type'], true)) { |
| 493 | $val = is_numeric($val) ? (int) $val : 0; |
| 494 | } |
| 495 | |
| 496 | if ($f === 'ping') { |
| 497 | $ival = $val; |
| 498 | |
| 499 | if ($ival >= 60000) { |
| 500 | $val = 0; |
| 501 | } else { |
| 502 | $val = $ival; |
| 503 | } |
| 504 | } |
| 505 | $player[$f] = $val; |
| 506 | } |
| 507 | $players[] = $player; |
| 508 | } |
| 509 | |
| 510 | $result['players'] = $players; |
| 511 | |
| 512 | break; |
| 513 | } |
| 514 | |
| 515 | return $result; |
| 516 | } |
| 517 | |
| 518 | /** |
| 519 | * query method. |
| 520 | */ |
| 521 | #[Override] |
| 522 | public function query(ServerAddress $addr): ServerInfo |
| 523 | { |
| 524 | $this->address = $addr->ip; |
| 525 | $this->queryport = $addr->port; |
| 526 | $this->query_server(true, true); |
| 527 | |
| 528 | return new ServerInfo( |
| 529 | address: $this->address, |
| 530 | queryport: $this->queryport, |
| 531 | online: $this->online, |
| 532 | gamename: $this->gamename, |
| 533 | gameversion: $this->gameversion, |
| 534 | servertitle: $this->servertitle, |
| 535 | mapname: $this->mapname, |
| 536 | gametype: $this->gametype, |
| 537 | numplayers: $this->numplayers, |
| 538 | maxplayers: $this->maxplayers, |
| 539 | rules: $this->rules, |
| 540 | players: $this->players, |
| 541 | errstr: $this->errstr, |
| 542 | ); |
| 543 | } |
| 544 | |
| 545 | /** |
| 546 | * getProtocolName method. |
| 547 | */ |
| 548 | #[Override] |
| 549 | public function getProtocolName(): string |
| 550 | { |
| 551 | return $this->protocol; |
| 552 | } |
| 553 | |
| 554 | /** |
| 555 | * getVersion method. |
| 556 | */ |
| 557 | #[Override] |
| 558 | public function getVersion(ServerInfo $info): string |
| 559 | { |
| 560 | return $info->gameversion ?? 'unknown'; |
| 561 | } |
| 562 | |
| 563 | /** |
| 564 | * @param array<int,string> $params |
| 565 | */ |
| 566 | private function buildPacket(array $params): string |
| 567 | { |
| 568 | $parts = []; |
| 569 | $totalLength = 12; |
| 570 | |
| 571 | foreach ($params as $p) { |
| 572 | $b = (string) $p; |
| 573 | $parts[] = $b; |
| 574 | $totalLength += 4 + strlen($b) + 1; |
| 575 | } |
| 576 | |
| 577 | $out = ''; |
| 578 | // header (0) little-endian |
| 579 | $out .= pack('V', 0); |
| 580 | // total length |
| 581 | $out .= pack('V', $totalLength); |
| 582 | // param count |
| 583 | $out .= pack('V', count($params)); |
| 584 | |
| 585 | foreach ($parts as $p) { |
| 586 | $out .= pack('V', strlen($p)); |
| 587 | $out .= $p; |
| 588 | $out .= chr(0); |
| 589 | } |
| 590 | |
| 591 | return $out; |
| 592 | } |
| 593 | |
| 594 | /** |
| 595 | * TCP query helper. |
| 596 | * |
| 597 | * @param resource $fp |
| 598 | * @param array<int,string> $params |
| 599 | * |
| 600 | * @return array<mixed>|false |
| 601 | */ |
| 602 | private function tcpQuery(mixed $fp, array $params): array|false |
| 603 | { |
| 604 | $packet = $this->buildPacket($params); |
| 605 | $written = fwrite($fp, $packet); |
| 606 | |
| 607 | if ($written === false) { |
| 608 | return false; |
| 609 | } |
| 610 | |
| 611 | $buf = ''; |
| 612 | $start = time(); |
| 613 | |
| 614 | while (true) { |
| 615 | $chunk = fread($fp, 8192); |
| 616 | |
| 617 | if ($chunk === false) { |
| 618 | break; |
| 619 | } |
| 620 | |
| 621 | if ($chunk !== '') { |
| 622 | $buf .= $chunk; |
| 623 | } |
| 624 | |
| 625 | $decoded = $this->decodePacket($buf); |
| 626 | |
| 627 | if ($decoded === false) { |
| 628 | // need more data |
| 629 | } else { |
| 630 | return $decoded; |
| 631 | } |
| 632 | |
| 633 | // timeout 2s |
| 634 | if ((time() - $start) > 2) { |
| 635 | break; |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | return false; |
| 640 | } |
| 641 | |
| 642 | /** |
| 643 | * @return array<string,mixed>|false |
| 644 | */ |
| 645 | private function decodePacket(string $buffer): array|false |
| 646 | { |
| 647 | if (strlen($buffer) < 8) { |
| 648 | return false; |
| 649 | } |
| 650 | |
| 651 | // manual pointer decode (header + totalLength already present) |
| 652 | $headerUnpacked = unpack('V', substr($buffer, 0, 4)); |
| 653 | |
| 654 | if ($headerUnpacked === false || !isset($headerUnpacked[1]) || !is_numeric($headerUnpacked[1])) { |
| 655 | return false; |
| 656 | } |
| 657 | |
| 658 | $header = (int) $headerUnpacked[1]; |
| 659 | |
| 660 | $totalLengthUnpacked = unpack('V', substr($buffer, 4, 4)); |
| 661 | |
| 662 | if ($totalLengthUnpacked === false || !isset($totalLengthUnpacked[1]) || !is_numeric($totalLengthUnpacked[1])) { |
| 663 | return false; |
| 664 | } |
| 665 | |
| 666 | $totalLength = (int) $totalLengthUnpacked[1]; |
| 667 | |
| 668 | // ensure we have whole packet |
| 669 | if (strlen($buffer) < $totalLength) { |
| 670 | return false; |
| 671 | } |
| 672 | |
| 673 | // check response flag (0x40000000) |
| 674 | if ((($header & 0x40000000) === 0)) { |
| 675 | // not a response packet |
| 676 | return false; |
| 677 | } |
| 678 | |
| 679 | $ptr = 8; |
| 680 | $result = []; |
| 681 | |
| 682 | // decode key/value pairs |
| 683 | for ($i = 0; $i < $header; $i++) { |
| 684 | if (strlen($buffer) < $ptr + 4) { |
| 685 | break; |
| 686 | } |
| 687 | $keyLenUnpacked = unpack('V', substr($buffer, $ptr, 4)); |
| 688 | |
| 689 | if ($keyLenUnpacked === false || !isset($keyLenUnpacked[1]) || !is_numeric($keyLenUnpacked[1])) { |
| 690 | break; |
| 691 | } |
| 692 | |
| 693 | $keyLen = (int) $keyLenUnpacked[1]; |
| 694 | $ptr += 4; |
| 695 | |
| 696 | if (strlen($buffer) < $ptr + $keyLen) { |
| 697 | break; |
| 698 | } |
| 699 | $key = substr($buffer, $ptr, $keyLen); |
| 700 | $ptr += $keyLen; |
| 701 | |
| 702 | if (strlen($buffer) < $ptr + 4) { |
| 703 | break; |
| 704 | } |
| 705 | $valLenUnpacked = unpack('V', substr($buffer, $ptr, 4)); |
| 706 | |
| 707 | if ($valLenUnpacked === false || !isset($valLenUnpacked[1]) || !is_numeric($valLenUnpacked[1])) { |
| 708 | break; |
| 709 | } |
| 710 | |
| 711 | $valLen = (int) $valLenUnpacked[1]; |
| 712 | $ptr += 4; |
| 713 | |
| 714 | if (strlen($buffer) < $ptr + $valLen) { |
| 715 | break; |
| 716 | } |
| 717 | $val = substr($buffer, $ptr, $valLen); |
| 718 | $ptr += $valLen; |
| 719 | |
| 720 | $result[$key] = $val; |
| 721 | } |
| 722 | |
| 723 | return $result; |
| 724 | } |
| 725 | } |