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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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use GameQ\Server; |
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/** |
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* Raknet Protocol Class |
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* |
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* See https://wiki.vg/Raknet_Protocol for more techinal information |
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* |
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* @author Austin Bischoff <[email protected]> |
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*/ |
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class Raknet extends Protocol |
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{ |
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/** |
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* The magic string that is sent to get access to the server information |
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*/ |
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const OFFLINE_MESSAGE_DATA_ID = "\x00\xFF\xFF\x00\xFE\xFE\xFE\xFE\xFD\xFD\xFD\xFD\x12\x34\x56\x78"; |
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/** |
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* Expected first part of the response from the server after query |
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*/ |
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const ID_UNCONNECTED_PONG = "\x1C"; |
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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_STATUS => "\x01%s%s\x02\x00\x00\x00\x00\x00\x00\x00", // Format time, magic, |
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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 = 'raknet'; |
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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 = 'raknet'; |
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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 = "Raknet Server"; |
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/** |
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* Do some work to build the packet we need to send out to query |
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* |
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* @param Server $server |
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* |
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* @return void |
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*/ |
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public function beforeSend(Server $server) |
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{ |
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// Update the server status packet before it is sent |
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$this->packets[self::PACKET_STATUS] = sprintf( |
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$this->packets[self::PACKET_STATUS], |
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pack('Q', time()), |
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self::OFFLINE_MESSAGE_DATA_ID |
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); |
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} |
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/** |
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* Process the response |
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* |
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* @return array |
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* @throws \GameQ\Exception\Protocol |
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*/ |
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public function processResponse() |
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{ |
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// Merge the response array into a buffer. Unknown if this protocol does split packets or not |
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$buffer = new Buffer(implode($this->packets_response)); |
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// Read first character from response. It should match below |
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$header = $buffer->read(1); |
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// Check first character to make sure the header matches |
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if ($header !== self::ID_UNCONNECTED_PONG) { |
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throw new Exception(sprintf( |
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'%s The header returned "%s" does not match the expected header of "%s"', |
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__METHOD__, |
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bin2hex($header), |
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bin2hex(self::ID_UNCONNECTED_PONG) |
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)); |
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} |
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// Burn the time section |
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$buffer->skip(8); |
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// Server GUID is next |
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$serverGUID = $buffer->readInt64(); |
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// Read the next set to check to make sure the "magic" matches |
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$magicCheck = $buffer->read(16); |
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// Magic check fails |
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if ($magicCheck !== self::OFFLINE_MESSAGE_DATA_ID) { |
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throw new Exception(sprintf( |
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'%s The magic value returned "%s" does not match the expected value of "%s"', |
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__METHOD__, |
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bin2hex($magicCheck), |
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bin2hex(self::OFFLINE_MESSAGE_DATA_ID) |
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)); |
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} |
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// According to docs the next character is supposed to be used for a length and string for the following |
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// character for the MOTD but it appears to be implemented incorrectly |
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// Burn the next two characters instead of trying to do anything useful with them |
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$buffer->skip(2); |
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// Set the result to a new result instance |
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$result = new Result(); |
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// Here on is server information delimited by semicolons (;) |
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$info = explode(';', $buffer->getBuffer()); |
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$result->add('edition', $info[0]); |
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$result->add('motd_line_1', $info[1]); |
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$result->add('protocol_version', (int)$info[2]); |
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$result->add('version', $info[3]); |
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$result->add('num_players', (int)$info[4]); |
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$result->add('max_players', (int)$info[5]); |
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$result->add('server_uid', $info[6]); |
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$result->add('motd_line_2', $info[7]); |
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$result->add('gamemode', $info[8]); |
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$result->add('gamemode_numeric', (int)$info[9]); |
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$result->add('port_ipv4', (isset($info[10])) ? (int)$info[10] : null); |
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$result->add('port_ipv6', (isset($info[11])) ? (int)$info[11] : null); |
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$result->add('dedicated', 1); |
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unset($header, $serverGUID, $magicCheck, $info); |
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return $result->fetch(); |
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} |
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} |
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Austinb /
GameQ
