126 lines
3.8 KiB
PHP
126 lines
3.8 KiB
PHP
<?php
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/**
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* TCP full stream wrapper.
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*
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* This file is part of MadelineProto.
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* MadelineProto is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
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* MadelineProto is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Affero General Public License for more details.
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* You should have received a copy of the GNU General Public License along with MadelineProto.
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* If not, see <http://www.gnu.org/licenses/>.
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*
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* @author Daniil Gentili <daniil@daniil.it>
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* @copyright 2016-2019 Daniil Gentili <daniil@daniil.it>
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* @license https://opensource.org/licenses/AGPL-3.0 AGPLv3
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*
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* @link https://docs.madelineproto.xyz MadelineProto documentation
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*/
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namespace danog\MadelineProto\Stream\MTProtoTransport;
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use Amp\Promise;
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use Amp\Socket\EncryptableSocket;
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use danog\MadelineProto\Stream\Async\BufferedStream;
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use danog\MadelineProto\Stream\BufferedStreamInterface;
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use danog\MadelineProto\Stream\Common\HashedBufferedStream;
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use danog\MadelineProto\Stream\ConnectionContext;
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use danog\MadelineProto\Stream\MTProtoBufferInterface;
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/**
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* TCP full stream wrapper.
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*
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* Manages obfuscated2 encryption/decryption
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*
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* @author Daniil Gentili <daniil@daniil.it>
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*/
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class FullStream implements BufferedStreamInterface, MTProtoBufferInterface
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{
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use BufferedStream;
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private $stream;
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private $in_seq_no = -1;
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private $out_seq_no = -1;
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/**
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* Stream to use as data source.
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*
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* @param ConnectionContext $ctx
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*
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* @return Promise
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*/
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public function connect(ConnectionContext $ctx, string $header = ''): Promise
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{
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$this->in_seq_no = -1;
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$this->out_seq_no = -1;
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$this->stream = new HashedBufferedStream();
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$this->stream->setExtra('crc32b_rev');
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return $this->stream->connect($ctx, $header);
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}
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/**
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* Async close.
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*
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* @return Promise
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*/
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public function disconnect()
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{
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return $this->stream->disconnect();
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}
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/**
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* Get write buffer asynchronously.
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*
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* @param int $length Length of data that is going to be written to the write buffer
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*
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* @return Generator
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*/
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public function getWriteBufferGenerator(int $length, string $append = ''): \Generator
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{
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$this->stream->startWriteHash();
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$this->stream->checkWriteHash($length + 8);
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$buffer = yield $this->stream->getWriteBuffer($length + 12, $append);
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$this->out_seq_no++;
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$buffer->bufferWrite(\pack('VV', $length + 12, $this->out_seq_no));
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return $buffer;
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}
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/**
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* Get read buffer asynchronously.
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*
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* @param int $length Length of payload, as detected by this layer
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*
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* @return Generator
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*/
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public function getReadBufferGenerator(&$length): \Generator
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{
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$this->stream->startReadHash();
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$buffer = yield $this->stream->getReadBuffer($l);
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$read_length = \unpack('V', yield $buffer->bufferRead(4))[1];
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$length = $read_length - 12;
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$this->stream->checkReadHash($read_length - 8);
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$this->in_seq_no++;
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$in_seq_no = \unpack('V', yield $buffer->bufferRead(4))[1];
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if ($in_seq_no != $this->in_seq_no) {
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throw new \danog\MadelineProto\Exception('Incoming seq_no mismatch');
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}
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return $buffer;
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}
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/**
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* {@inheritdoc}
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*
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* @return EncryptableSocket
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*/
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public function getSocket(): EncryptableSocket
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{
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return $this->stream->getSocket();
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}
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public static function getName(): string
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{
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return __CLASS__;
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}
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}
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