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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 "BtBitfieldMessage.h"
#include <cstring>
#include "bittorrent_helper.h"
#include "util.h"
#include "DlAbortEx.h"
#include "message.h"
#include "Peer.h"
#include "PieceStorage.h"
#include "a2functional.h"
namespace aria2 {
const char BtBitfieldMessage::NAME[] = "bitfield";
BtBitfieldMessage::BtBitfieldMessage() : SimpleBtMessage(ID, NAME) {}
BtBitfieldMessage::BtBitfieldMessage(const unsigned char* bitfield,
size_t bitfieldLength)
: SimpleBtMessage(ID, NAME), bitfield_(bitfield, bitfield + bitfieldLength)
{
}
BtBitfieldMessage::~BtBitfieldMessage() {}
void BtBitfieldMessage::setBitfield(const unsigned char* bitfield,
size_t bitfieldLength)
{
bitfield_.assign(bitfield, bitfield + bitfieldLength);
}
std::unique_ptr<BtBitfieldMessage>
BtBitfieldMessage::create(const unsigned char* data, size_t dataLength)
{
bittorrent::assertPayloadLengthGreater(1, dataLength, NAME);
bittorrent::assertID(ID, data, NAME);
auto message = make_unique<BtBitfieldMessage>();
message->setBitfield(data + 1, dataLength - 1);
return message;
}
void BtBitfieldMessage::doReceivedAction()
{
if (isMetadataGetMode()) {
return;
}
getPieceStorage()->updatePieceStats(bitfield_.data(), bitfield_.size(),
getPeer()->getBitfield());
getPeer()->setBitfield(bitfield_.data(), bitfield_.size());
if (getPeer()->isSeeder() && getPieceStorage()->downloadFinished()) {
throw DL_ABORT_EX(MSG_GOOD_BYE_SEEDER);
}
}
std::vector<unsigned char> BtBitfieldMessage::createMessage()
{
/**
* len --- 1+bitfieldLength, 4bytes
* id --- 5, 1byte
* bitfield --- bitfield, bitfieldLength bytes
* total: 5+bitfieldLength bytes
*/
const size_t msgLength = 5 + bitfield_.size();
auto msg = std::vector<unsigned char>(msgLength);
bittorrent::createPeerMessageString(msg.data(), msgLength,
1 + bitfield_.size(), ID);
std::copy(std::begin(bitfield_), std::end(bitfield_), std::begin(msg) + 5);
return msg;
}
std::string BtBitfieldMessage::toString() const
{
std::string s = NAME;
s += ' ';
s += util::toHex(bitfield_.data(), bitfield_.size());
return s;
}
} // namespace aria2
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