aria2/src/BtRequestMessage.cc

/* <!-- 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 "BtRequestMessage.h"
#include "Peer.h"
#include "Piece.h"
#include "PieceStorage.h"
#include "BtMessageDispatcher.h"
#include "BtMessageFactory.h"
#include "BtPieceMessage.h"
#include "BtRejectMessage.h"

namespace aria2 {

const char BtRequestMessage::NAME[] = "request";

BtRequestMessage::BtRequestMessage(size_t index, int32_t begin, int32_t length,
                                   size_t blockIndex)
    : RangeBtMessage(ID, NAME, index, begin, length), blockIndex_(blockIndex)
{
}

std::unique_ptr<BtRequestMessage>
BtRequestMessage::create(const unsigned char* data, size_t dataLength)
{
  return RangeBtMessage::create<BtRequestMessage>(data, dataLength);
}

void BtRequestMessage::doReceivedAction()
{
  if (isMetadataGetMode()) {
    return;
  }
  if (getPieceStorage()->hasPiece(getIndex()) &&
      (!getPeer()->amChoking() ||
       (getPeer()->amChoking() &&
        getPeer()->isInAmAllowedIndexSet(getIndex())))) {
    getBtMessageDispatcher()->addMessageToQueue(
        getBtMessageFactory()->createPieceMessage(getIndex(), getBegin(),
                                                  getLength()));
  }
  else {
    if (getPeer()->isFastExtensionEnabled()) {
      getBtMessageDispatcher()->addMessageToQueue(
          getBtMessageFactory()->createRejectMessage(getIndex(), getBegin(),
                                                     getLength()));
    }
  }
}

void BtRequestMessage::onQueued()
{
  getBtMessageDispatcher()->addOutstandingRequest(
      make_unique<RequestSlot>(getIndex(), getBegin(), getLength(), blockIndex_,
                               getPieceStorage()->getPiece(getIndex())));
}

void BtRequestMessage::onAbortOutstandingRequestEvent(
    const BtAbortOutstandingRequestEvent& event)
{
  if (getIndex() == event.getPiece()->getIndex() && !isInvalidate()) {
    setInvalidate(true);
  }
}

} // namespace aria2