mirror of https://github.com/aria2/aria2
122 lines
3.8 KiB
C++
122 lines
3.8 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#include "BtExtendedMessage.h"
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#include <cassert>
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#include <cstring>
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#include "ExtensionMessage.h"
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#include "ExtensionMessageFactory.h"
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#include "bittorrent_helper.h"
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#include "Peer.h"
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#include "DlAbortEx.h"
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#include "message.h"
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#include "util.h"
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#include "StringFormat.h"
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#include "a2functional.h"
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namespace aria2 {
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const std::string BtExtendedMessage::NAME("extended");
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BtExtendedMessage::BtExtendedMessage
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(const ExtensionMessageHandle& extensionMessage):
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SimpleBtMessage(ID, NAME),
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_extensionMessage(extensionMessage),
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_msg(0),
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_msgLength(0)
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{}
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BtExtendedMessage::~BtExtendedMessage()
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{
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delete [] _msg;
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}
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const unsigned char* BtExtendedMessage::getMessage() {
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if(!_msg) {
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/**
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* len --- 2+extpayload.length, 4bytes
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* id --- 20, 1byte
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* extmsgid --- extmsgid, 1byte
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* extpayload --- extpayload, nbytes
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* total: 6+extpayload.length bytes
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*/
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std::string payload = _extensionMessage->getPayload();
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_msgLength = 6+payload.size();
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_msg = new unsigned char[_msgLength];
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bittorrent::createPeerMessageString(_msg, _msgLength, 2+payload.size(), ID);
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*(_msg+5) = _extensionMessage->getExtensionMessageID();
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memcpy(_msg+6, payload.c_str(), payload.size());
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}
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return _msg;
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}
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size_t BtExtendedMessage::getMessageLength() {
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getMessage();
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return _msgLength;
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}
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bool BtExtendedMessage::sendPredicate() const
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{
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return peer->isExtendedMessagingEnabled();
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}
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std::string BtExtendedMessage::toString() const {
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return strconcat(NAME, " ", _extensionMessage->toString());
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}
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BtExtendedMessageHandle
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BtExtendedMessage::create(const SharedHandle<ExtensionMessageFactory>& factory,
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const PeerHandle& peer,
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const unsigned char* data, size_t dataLength)
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{
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bittorrent::assertPayloadLengthGreater(1, dataLength, NAME);
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bittorrent::assertID(ID, data, NAME);
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assert(!factory.isNull());
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ExtensionMessageHandle extmsg = factory->createMessage(data+1,
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dataLength-1);
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BtExtendedMessageHandle message(new BtExtendedMessage(extmsg));
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return message;
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}
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void BtExtendedMessage::doReceivedAction()
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{
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if(!_extensionMessage.isNull()) {
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_extensionMessage->doReceivedAction();
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}
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}
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} // namespace aria2
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