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<?php |
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/** |
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* This file is part of GameQ. |
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* |
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* GameQ is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation; either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* GameQ is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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namespace GameQ\Protocols; |
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use GameQ\Buffer; |
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use GameQ\Exception\Protocol as Exception; |
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use GameQ\Protocol; |
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use GameQ\Result; |
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/** |
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* Valve Source Engine Protocol Class (A2S) |
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* |
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* This class is used as the basis for all other source based servers |
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* that rely on the source protocol for game querying. |
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* |
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* @SuppressWarnings(PHPMD.NumberOfChildren) |
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* |
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* @author Austin Bischoff <[email protected]> |
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*/ |
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class Source extends Protocol |
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{ |
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/* |
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* Source engine type constants |
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*/ |
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const SOURCE_ENGINE = 0, |
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GOLDSOURCE_ENGINE = 1; |
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/** |
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* Array of packets we want to look up. |
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* Each key should correspond to a defined method in this or a parent class |
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* |
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* @type array |
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*/ |
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protected $packets = [ |
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self::PACKET_CHALLENGE => "\xFF\xFF\xFF\xFF\x56\x00\x00\x00\x00", |
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self::PACKET_DETAILS => "\xFF\xFF\xFF\xFFTSource Engine Query\x00", |
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self::PACKET_PLAYERS => "\xFF\xFF\xFF\xFF\x55%s", |
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self::PACKET_RULES => "\xFF\xFF\xFF\xFF\x56%s", |
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]; |
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/** |
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* Use the response flag to figure out what method to run |
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* |
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* @type array |
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*/ |
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protected $responses = [ |
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"\x49" => "processDetails", // I |
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"\x6d" => "processDetailsGoldSource", // m, goldsource |
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"\x44" => "processPlayers", // D |
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"\x45" => "processRules", // E |
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]; |
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/** |
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* The query protocol used to make the call |
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* |
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* @type string |
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*/ |
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protected $protocol = 'source'; |
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/** |
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* String name of this protocol class |
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* |
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* @type string |
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*/ |
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protected $name = 'source'; |
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/** |
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* Longer string name of this protocol class |
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* |
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* @type string |
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*/ |
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protected $name_long = "Source Server"; |
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/** |
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* Define the Source engine type. By default it is assumed to be Source |
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* |
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* @type int |
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*/ |
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protected $source_engine = self::SOURCE_ENGINE; |
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/** |
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* The client join link |
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* |
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* @type string |
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*/ |
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protected $join_link = "steam://connect/%s:%d/"; |
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/** |
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* Normalize settings for this protocol |
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* |
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* @type array |
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*/ |
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protected $normalize = [ |
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// General |
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'general' => [ |
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// target => source |
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'dedicated' => 'dedicated', |
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'gametype' => 'game_descr', |
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'hostname' => 'hostname', |
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'mapname' => 'map', |
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'maxplayers' => 'max_players', |
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'mod' => 'game_dir', |
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'numplayers' => 'num_players', |
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'password' => 'password', |
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], |
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// Individual |
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'player' => [ |
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'name' => 'name', |
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'score' => 'score', |
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'time' => 'time', |
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], |
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]; |
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/** |
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* Parse the challenge response and apply it to all the packet types |
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* |
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* @param \GameQ\Buffer $challenge_buffer |
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* |
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* @return bool |
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* @throws \GameQ\Exception\Protocol |
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*/ |
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public function challengeParseAndApply(Buffer $challenge_buffer) |
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{ |
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// Skip the header |
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$challenge_buffer->skip(5); |
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// Apply the challenge and return |
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return $this->challengeApply($challenge_buffer->read(4)); |
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} |
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/** |
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* Process the response |
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* |
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* @return array |
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* @throws \GameQ\Exception\Protocol |
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*/ |
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public function processResponse() |
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{ |
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// Will hold the results when complete |
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$results = []; |
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// Holds sorted response packets |
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$packets = []; |
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// We need to pre-sort these for split packets so we can do extra work where needed |
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foreach ($this->packets_response as $response) { |
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$buffer = new Buffer($response); |
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// Get the header of packet (long) |
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$header = $buffer->readInt32Signed(); |
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// Single packet |
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if ($header == -1) { |
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// We need to peek and see what kind of engine this is for later processing |
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if ($buffer->lookAhead(1) == "\x6d") { |
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$this->source_engine = self::GOLDSOURCE_ENGINE; |
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} |
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$packets[] = $buffer->getBuffer(); |
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continue; |
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} else { |
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// Split packet |
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// Packet Id (long) |
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$packet_id = $buffer->readInt32Signed() + 10; |
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// Add the buffer to the packet as another array |
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$packets[$packet_id][] = $buffer->getBuffer(); |
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} |
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} |
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// Free up memory |
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unset($response, $packet_id, $buffer, $header); |
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// Now that we have the packets sorted we need to iterate and process them |
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foreach ($packets as $packet_id => $packet) { |
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// We first need to off load split packets to combine them |
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if (is_array($packet)) { |
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$buffer = new Buffer($this->processPackets($packet_id, $packet)); |
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} else { |
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$buffer = new Buffer($packet); |
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} |
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// Figure out what packet response this is for |
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$response_type = $buffer->read(1); |
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// Figure out which packet response this is |
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if (!array_key_exists($response_type, $this->responses)) { |
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throw new Exception(__METHOD__ . " response type '{$response_type}' is not valid"); |
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} |
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// Now we need to call the proper method |
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$results = array_merge( |
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$results, |
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call_user_func_array([$this, $this->responses[$response_type]], [$buffer]) |
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); |
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unset($buffer); |
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} |
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// Free up memory |
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unset($packets, $packet, $packet_id, $response_type); |
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return $results; |
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} |
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/* |
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* Internal methods |
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*/ |
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/** |
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* Process the split packets and decompress if necessary |
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* |
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* @SuppressWarnings(PHPMD.UnusedLocalVariable) |
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* |
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* @param $packet_id |
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* @param array $packets |
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* |
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* @return string |
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* @throws \GameQ\Exception\Protocol |
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*/ |
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protected function processPackets($packet_id, array $packets = []) |
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{ |
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// Init array so we can order |
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$packs = []; |
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// We have multiple packets so we need to get them and order them |
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foreach ($packets as $i => $packet) { |
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// Make a buffer so we can read this info |
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$buffer = new Buffer($packet); |
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// Gold source |
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if ($this->source_engine == self::GOLDSOURCE_ENGINE) { |
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// Grab the packet number (byte) |
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$packet_number = $buffer->readInt8(); |
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// We need to burn the extra header (\xFF\xFF\xFF\xFF) on first loop |
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if ($i == 0) { |
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$buffer->read(4); |
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} |
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// Now add the rest of the packet to the new array with the packet_number as the id so we can order it |
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$packs[$packet_number] = $buffer->getBuffer(); |
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} else { |
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// Number of packets in this set (byte) |
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$buffer->readInt8(); |
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// The current packet number (byte) |
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$packet_number = $buffer->readInt8(); |
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// Check to see if this is compressed |
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// @todo: Check to make sure these decompress correctly, new changes may affect this loop. |
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if ($packet_id & 0x80000000) { |
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// Check to see if we have Bzip2 installed |
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if (!function_exists('bzdecompress')) { |
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// @codeCoverageIgnoreStart |
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throw new Exception( |
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'Bzip2 is not installed. See http://www.php.net/manual/en/book.bzip2.php for more info.', |
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0 |
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); |
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// @codeCoverageIgnoreEnd |
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} |
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// Get the length of the packet (long) |
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$packet_length = $buffer->readInt32Signed(); |
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// Checksum for the decompressed packet (long), burn it - doesnt work in split responses |
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$buffer->readInt32Signed(); |
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// Try to decompress |
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$result = bzdecompress($buffer->getBuffer()); |
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// Now verify the length |
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if (strlen($result) != $packet_length) { |
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// @codeCoverageIgnoreStart |
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throw new Exception( |
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"Checksum for compressed packet failed! Length expected: {$packet_length}, length |
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returned: " . strlen($result) |
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); |
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// @codeCoverageIgnoreEnd |
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} |
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// We need to burn the extra header (\xFF\xFF\xFF\xFF) on first loop |
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if ($i == 0) { |
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$result = substr($result, 4); |
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} |
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} else { |
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// Get the packet length (short), burn it |
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$buffer->readInt16Signed(); |
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// We need to burn the extra header (\xFF\xFF\xFF\xFF) on first loop |
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17 |
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if ($i == 0) { |
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$buffer->read(4); |
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} |
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// Grab the rest of the buffer as a result |
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$result = $buffer->getBuffer(); |
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} |
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// Add this packet to the list |
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$packs[$packet_number] = $result; |
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} |
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unset($buffer); |
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} |
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// Free some memory |
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29 |
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unset($packets, $packet); |
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// Sort the packets by packet number |
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ksort($packs); |
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// Now combine the packs into one and return |
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return implode("", $packs); |
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} |
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/** |
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* Handles processing the details data into a usable format |
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* |
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* @param \GameQ\Buffer $buffer |
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* |
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* @return mixed |
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* @throws \GameQ\Exception\Protocol |
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*/ |
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|
106 |
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protected function processDetails(Buffer $buffer) |
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{ |
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347
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// Set the result to a new result instance |
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106 |
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$result = new Result(); |
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350
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106 |
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$result->add('protocol', $buffer->readInt8()); |
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106 |
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$result->add('hostname', $buffer->readString()); |
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106 |
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$result->add('map', $buffer->readString()); |
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106 |
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$result->add('game_dir', $buffer->readString()); |
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106 |
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$result->add('game_descr', $buffer->readString()); |
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106 |
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$result->add('steamappid', $buffer->readInt16()); |
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106 |
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$result->add('num_players', $buffer->readInt8()); |
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106 |
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$result->add('max_players', $buffer->readInt8()); |
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106 |
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$result->add('num_bots', $buffer->readInt8()); |
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106 |
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$result->add('dedicated', $buffer->read()); |
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106 |
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$result->add('os', $buffer->read()); |
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106 |
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$result->add('password', $buffer->readInt8()); |
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106 |
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$result->add('secure', $buffer->readInt8()); |
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// Special result for The Ship only (appid=2400) |
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106 |
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if ($result->get('steamappid') == 2400) { |
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3 |
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$result->add('game_mode', $buffer->readInt8()); |
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3 |
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$result->add('witness_count', $buffer->readInt8()); |
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3 |
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$result->add('witness_time', $buffer->readInt8()); |
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} |
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371
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106 |
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$result->add('version', $buffer->readString()); |
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// Because of php 5.4... |
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106 |
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$edfCheck = $buffer->lookAhead(1); |
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|
// Extra data flag |
377
|
106 |
|
if (!empty($edfCheck)) { |
378
|
103 |
|
$edf = $buffer->readInt8(); |
379
|
|
|
|
380
|
103 |
|
if ($edf & 0x80) { |
381
|
103 |
|
$result->add('port', $buffer->readInt16Signed()); |
382
|
|
|
} |
383
|
|
|
|
384
|
103 |
|
if ($edf & 0x10) { |
385
|
101 |
|
$result->add('steam_id', $buffer->readInt64()); |
386
|
|
|
} |
387
|
|
|
|
388
|
103 |
|
if ($edf & 0x40) { |
389
|
2 |
|
$result->add('sourcetv_port', $buffer->readInt16Signed()); |
390
|
2 |
|
$result->add('sourcetv_name', $buffer->readString()); |
391
|
|
|
} |
392
|
|
|
|
393
|
103 |
|
if ($edf & 0x20) { |
394
|
88 |
|
$result->add('keywords', $buffer->readString()); |
395
|
|
|
} |
396
|
|
|
|
397
|
103 |
|
if ($edf & 0x01) { |
398
|
101 |
|
$result->add('game_id', $buffer->readInt64()); |
399
|
|
|
} |
400
|
|
|
|
401
|
103 |
|
unset($edf); |
402
|
|
|
} |
403
|
|
|
|
404
|
106 |
|
unset($buffer); |
405
|
|
|
|
406
|
106 |
|
return $result->fetch(); |
407
|
|
|
} |
408
|
|
|
|
409
|
|
|
/** |
410
|
|
|
* Handles processing the server details from goldsource response |
411
|
|
|
* |
412
|
|
|
* @param \GameQ\Buffer $buffer |
413
|
|
|
* |
414
|
|
|
* @return array |
415
|
|
|
* @throws \GameQ\Exception\Protocol |
416
|
|
|
*/ |
417
|
4 |
|
protected function processDetailsGoldSource(Buffer $buffer) |
418
|
|
|
{ |
419
|
|
|
|
420
|
|
|
// Set the result to a new result instance |
421
|
4 |
|
$result = new Result(); |
422
|
|
|
|
423
|
4 |
|
$result->add('address', $buffer->readString()); |
424
|
4 |
|
$result->add('hostname', $buffer->readString()); |
425
|
4 |
|
$result->add('map', $buffer->readString()); |
426
|
4 |
|
$result->add('game_dir', $buffer->readString()); |
427
|
4 |
|
$result->add('game_descr', $buffer->readString()); |
428
|
4 |
|
$result->add('num_players', $buffer->readInt8()); |
429
|
4 |
|
$result->add('max_players', $buffer->readInt8()); |
430
|
4 |
|
$result->add('version', $buffer->readInt8()); |
431
|
4 |
|
$result->add('dedicated', $buffer->read()); |
432
|
4 |
|
$result->add('os', $buffer->read()); |
433
|
4 |
|
$result->add('password', $buffer->readInt8()); |
434
|
|
|
|
435
|
|
|
// Mod section |
436
|
4 |
|
$result->add('ismod', $buffer->readInt8()); |
437
|
|
|
|
438
|
|
|
// We only run these if ismod is 1 (true) |
439
|
4 |
|
if ($result->get('ismod') == 1) { |
440
|
4 |
|
$result->add('mod_urlinfo', $buffer->readString()); |
441
|
4 |
|
$result->add('mod_urldl', $buffer->readString()); |
442
|
4 |
|
$buffer->skip(); |
443
|
4 |
|
$result->add('mod_version', $buffer->readInt32Signed()); |
444
|
4 |
|
$result->add('mod_size', $buffer->readInt32Signed()); |
445
|
4 |
|
$result->add('mod_type', $buffer->readInt8()); |
446
|
4 |
|
$result->add('mod_cldll', $buffer->readInt8()); |
447
|
|
|
} |
448
|
|
|
|
449
|
4 |
|
$result->add('secure', $buffer->readInt8()); |
450
|
4 |
|
$result->add('num_bots', $buffer->readInt8()); |
451
|
|
|
|
452
|
4 |
|
unset($buffer); |
453
|
|
|
|
454
|
4 |
|
return $result->fetch(); |
455
|
|
|
} |
456
|
|
|
|
457
|
|
|
/** |
458
|
|
|
* Handles processing the player data into a usable format |
459
|
|
|
* |
460
|
|
|
* @param \GameQ\Buffer $buffer |
461
|
|
|
* |
462
|
|
|
* @return mixed |
463
|
|
|
*/ |
464
|
105 |
|
protected function processPlayers(Buffer $buffer) |
465
|
|
|
{ |
466
|
|
|
|
467
|
|
|
// Set the result to a new result instance |
468
|
105 |
|
$result = new Result(); |
469
|
|
|
|
470
|
|
|
// Pull out the number of players |
471
|
105 |
|
$num_players = $buffer->readInt8(); |
472
|
|
|
|
473
|
|
|
// Player count |
474
|
105 |
|
$result->add('num_players', $num_players); |
475
|
|
|
|
476
|
|
|
// No players so no need to look any further |
477
|
105 |
|
if ($num_players == 0) { |
478
|
31 |
|
return $result->fetch(); |
479
|
|
|
} |
480
|
|
|
|
481
|
|
|
// Players list |
482
|
74 |
|
while ($buffer->getLength()) { |
483
|
74 |
|
$result->addPlayer('id', $buffer->readInt8()); |
484
|
74 |
|
$result->addPlayer('name', $buffer->readString()); |
485
|
74 |
|
$result->addPlayer('score', $buffer->readInt32Signed()); |
486
|
74 |
|
$result->addPlayer('time', $buffer->readFloat32()); |
487
|
|
|
} |
488
|
|
|
|
489
|
74 |
|
unset($buffer); |
490
|
|
|
|
491
|
74 |
|
return $result->fetch(); |
492
|
|
|
} |
493
|
|
|
|
494
|
|
|
/** |
495
|
|
|
* Handles processing the rules data into a usable format |
496
|
|
|
* |
497
|
|
|
* @param \GameQ\Buffer $buffer |
498
|
|
|
* |
499
|
|
|
* @return mixed |
500
|
|
|
*/ |
501
|
85 |
|
protected function processRules(Buffer $buffer) |
502
|
|
|
{ |
503
|
|
|
|
504
|
|
|
// Set the result to a new result instance |
505
|
85 |
|
$result = new Result(); |
506
|
|
|
|
507
|
|
|
// Count the number of rules |
508
|
85 |
|
$num_rules = $buffer->readInt16Signed(); |
509
|
|
|
|
510
|
|
|
// Add the count of the number of rules this server has |
511
|
85 |
|
$result->add('num_rules', $num_rules); |
512
|
|
|
|
513
|
|
|
// Rules |
514
|
85 |
|
while ($buffer->getLength()) { |
515
|
85 |
|
$result->add($buffer->readString(), $buffer->readString()); |
516
|
|
|
} |
517
|
|
|
|
518
|
85 |
|
unset($buffer); |
519
|
|
|
|
520
|
85 |
|
return $result->fetch(); |
521
|
|
|
} |
522
|
|
|
} |
523
|
|
|
|