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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 "DHTNode.h"
#include <cstring>
#include "util.h"
#include "a2functional.h"
#include "bittorrent_helper.h"
#include "wallclock.h"
namespace aria2 {
DHTNode::DHTNode():port_(0), rtt_(0), condition_(0), lastContact_(0)
{
generateID();
}
DHTNode::DHTNode(const unsigned char* id):port_(0), rtt_(0), condition_(1), lastContact_(0)
{
memcpy(id_, id, DHT_ID_LENGTH);
}
void DHTNode::generateID()
{
util::generateRandomKey(id_);
}
bool DHTNode::operator==(const DHTNode& node) const
{
return memcmp(id_, node.id_, DHT_ID_LENGTH) == 0;
}
bool DHTNode::operator<(const DHTNode& node) const
{
for(size_t i = 0; i < DHT_ID_LENGTH; ++i) {
if(id_[i] > node.id_[i]) {
return false;
} else if(id_[i] < node.id_[i]) {
return true;
}
}
return true;
}
bool DHTNode::isGood() const
{
return !isBad() && !isQuestionable();
}
#define BAD_CONDITION 5
bool DHTNode::isBad() const
{
return condition_ >= BAD_CONDITION;
}
bool DHTNode::isQuestionable() const
{
return !isBad() &&
lastContact_.difference(global::wallclock) >= DHT_NODE_CONTACT_INTERVAL;
}
void DHTNode::markGood()
{
condition_ = 0;
}
void DHTNode::markBad()
{
condition_ = BAD_CONDITION;
}
void DHTNode::updateLastContact()
{
lastContact_ = global::wallclock;
}
void DHTNode::timeout()
{
++condition_;
}
std::string DHTNode::toString() const
{
return strconcat("DHTNode ID=", util::toHex(id_, DHT_ID_LENGTH),
", Host=", ipaddr_, ":", util::uitos(port_),
", Condition=", util::uitos(condition_),
", RTT=", util::uitos(rtt_));
}
void DHTNode::setID(const unsigned char* id)
{
memcpy(id_, id, DHT_ID_LENGTH);
}
} // namespace aria2
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