githubmirror/aria2

src/DHTMessage.cc
70 строк2 KB
Tatsuhiro Tsujikawa
Increase DHT transaction ID from 2 to 4 bytes to avoid conflict
23 янв 2016, 06:39
23 янв 2016, 06:398203ee3
/* <!-- 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 "DHTMessage.h"
#include "DHTNode.h"
#include "util.h"

namespace aria2 {

const std::string DHTMessage::Y("y");

const std::string DHTMessage::T("t");

const std::string DHTMessage::V("v");

const std::string DHTMessage::ID("id");

DHTMessage::DHTMessage(const std::shared_ptr<DHTNode>& localNode,
                       const std::shared_ptr<DHTNode>& remoteNode,
                       const std::string& transactionID)
    : localNode_{localNode},
      remoteNode_{remoteNode},
      transactionID_{transactionID}
{
  if (transactionID.empty()) {
    generateTransactionID();
  }
}

DHTMessage::~DHTMessage() {}

void DHTMessage::generateTransactionID()
{
  transactionID_.resize(DHT_TRANSACTION_ID_LENGTH);
  util::generateRandomData(reinterpret_cast<unsigned char*>(&transactionID_[0]),
                           transactionID_.size());
}

} // namespace aria2