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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 "ExtensionMessage.h"
#include "ExtensionMessageFactory.h"
#include "PeerMessageUtil.h"
#include "Peer.h"
#include "BtContext.h"
#include "DlAbortEx.h"
#include "message.h"
#include "Util.h"
#include "StringFormat.h"
#include <cassert>
#include <cstring>
namespace aria2 {
BtExtendedMessage::BtExtendedMessage(const ExtensionMessageHandle& extensionMessage):_extensionMessage(extensionMessage), _msg(0), _msgLength(0)
{}
BtExtendedMessage::~BtExtendedMessage()
{
delete [] _msg;
}
const unsigned char* BtExtendedMessage::getMessage() {
if(!_msg) {
/**
* len --- 2+extpayload.length, 4bytes
* id --- 20, 1byte
* extmsgid --- extmsgid, 1byte
* extpayload --- extpayload, nbytes
* total: 6+extpayload.length bytes
*/
std::string payload = _extensionMessage->getBencodedData();
_msgLength = 6+payload.size();
_msg = new unsigned char[_msgLength];
PeerMessageUtil::createPeerMessageString(_msg, _msgLength, 2+payload.size(), ID);
*(_msg+5) = _extensionMessage->getExtensionMessageID();
memcpy(_msg+6, payload.c_str(), payload.size());
}
return _msg;
}
size_t BtExtendedMessage::getMessageLength() {
getMessage();
return _msgLength;
}
bool BtExtendedMessage::sendPredicate() const
{
return peer->isExtendedMessagingEnabled();
}
std::string BtExtendedMessage::toString() const {
return "extended "+_extensionMessage->toString();
}
BtExtendedMessageHandle
BtExtendedMessage::create(const SharedHandle<ExtensionMessageFactory>& factory,
const PeerHandle& peer,
const unsigned char* data, size_t dataLength)
{
if(dataLength < 2) {
throw DlAbortEx
(StringFormat(MSG_TOO_SMALL_PAYLOAD_SIZE, "extended", dataLength).str());
}
uint8_t id = PeerMessageUtil::getId(data);
if(id != ID) {
throw DlAbortEx
(StringFormat(EX_INVALID_BT_MESSAGE_ID, id, "extended", ID).str());
}
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();
}
}
ExtensionMessageHandle BtExtendedMessage::getExtensionMessage() const
{
return _extensionMessage;
}
} // namespace aria2
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