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