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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 "PeerReceiveHandshakeCommand.h"
#include "PeerConnection.h"
#include "DownloadEngine.h"
#include "BtHandshakeMessage.h"
#include "Util.h"
#include "BtContext.h"
#include "DlAbortEx.h"
#include "PeerInteractionCommand.h"
#include "Peer.h"
#include "BtRegistry.h"
#include "PeerStorage.h"
#include "PieceStorage.h"
#include "BtRuntime.h"
#include "BtConstants.h"
#include "message.h"
#include "Socket.h"
#include "Logger.h"
#include "prefs.h"
#include "Option.h"
#include "RequestGroupMan.h"
namespace aria2 {
PeerReceiveHandshakeCommand::PeerReceiveHandshakeCommand(int32_t cuid,
const PeerHandle& peer,
DownloadEngine* e,
const SocketHandle& s,
const SharedHandle<PeerConnection>& peerConnection):
PeerAbstractCommand(cuid, peer, e, s),
_peerConnection(peerConnection),
_thresholdSpeed(SLOW_SPEED_THRESHOLD)
{
if(_peerConnection.isNull()) {
_peerConnection = new PeerConnection(cuid, socket, e->option);
}
int32_t maxDownloadSpeed = e->option->getAsInt(PREF_MAX_DOWNLOAD_LIMIT);
if(maxDownloadSpeed > 0) {
_thresholdSpeed = std::min(maxDownloadSpeed, _thresholdSpeed);
}
}
PeerReceiveHandshakeCommand::~PeerReceiveHandshakeCommand() {}
bool PeerReceiveHandshakeCommand::exitBeforeExecute()
{
return e->isHaltRequested() || e->_requestGroupMan->downloadFinished();
}
bool PeerReceiveHandshakeCommand::executeInternal()
{
unsigned char data[BtHandshakeMessage::MESSAGE_LENGTH];
int32_t dataLength = BtHandshakeMessage::MESSAGE_LENGTH;
// ignore return value. The received data is kept in PeerConnection object
// because of peek = true.
_peerConnection->receiveHandshake(data, dataLength, true);
// To handle tracker's NAT-checking feature
if(dataLength >= 48) {
// check info_hash
std::string infoHash = Util::toHex(&data[28], INFO_HASH_LENGTH);
BtContextHandle btContext = BtRegistry::getBtContext(infoHash);
if(btContext.isNull() || !BT_RUNTIME(btContext)->ready()) {
throw new DlAbortEx("Unknown info hash %s", infoHash.c_str());
}
TransferStat tstat = PEER_STORAGE(btContext)->calculateStat();
if((!PIECE_STORAGE(btContext)->downloadFinished() &&
tstat.getDownloadSpeed() < _thresholdSpeed) ||
BT_RUNTIME(btContext)->getConnections() < MAX_PEERS) {
if(PEER_STORAGE(btContext)->addPeer(peer)) {
peer->usedBy(cuid);
PeerInteractionCommand* command =
new PeerInteractionCommand(cuid,
btContext->getOwnerRequestGroup(),
peer,
e,
btContext,
socket,
PeerInteractionCommand::RECEIVER_WAIT_HANDSHAKE,
_peerConnection);
e->commands.push_back(command);
logger->debug(MSG_INCOMING_PEER_CONNECTION, cuid, peer->usedBy());
}
}
return true;
} else {
e->commands.push_back(this);
return false;
}
}
} // namespace aria2
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