aria2/src/BtSeederStateChoke.cc

193 lines
5.3 KiB
C++

/* <!-- 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 "BtSeederStateChoke.h"
#include <algorithm>
#include "Peer.h"
#include "Logger.h"
#include "LogFactory.h"
#include "SimpleRandomizer.h"
#include "wallclock.h"
#include "fmt.h"
namespace aria2 {
BtSeederStateChoke::BtSeederStateChoke() : round_(0), lastRound_(Timer::zero())
{
}
BtSeederStateChoke::~BtSeederStateChoke() {}
namespace {
constexpr auto TIME_FRAME = 20_s;
} // namespace
BtSeederStateChoke::PeerEntry::PeerEntry(const std::shared_ptr<Peer>& peer)
: peer_(peer),
outstandingUpload_(peer->countOutstandingUpload()),
lastAmUnchoking_(peer->getLastAmUnchoking()),
recentUnchoking_(lastAmUnchoking_.difference(global::wallclock()) <
TIME_FRAME),
uploadSpeed_(peer->calculateUploadSpeed())
{
}
BtSeederStateChoke::PeerEntry::PeerEntry(const PeerEntry& c)
: peer_(c.peer_),
outstandingUpload_(c.outstandingUpload_),
lastAmUnchoking_(c.lastAmUnchoking_),
recentUnchoking_(c.recentUnchoking_),
uploadSpeed_(c.uploadSpeed_)
{
}
BtSeederStateChoke::PeerEntry::~PeerEntry() {}
void BtSeederStateChoke::PeerEntry::swap(PeerEntry& c)
{
using std::swap;
swap(peer_, c.peer_);
swap(outstandingUpload_, c.outstandingUpload_);
swap(lastAmUnchoking_, c.lastAmUnchoking_);
swap(recentUnchoking_, c.recentUnchoking_);
swap(uploadSpeed_, c.uploadSpeed_);
}
BtSeederStateChoke::PeerEntry& BtSeederStateChoke::PeerEntry::
operator=(const PeerEntry& c)
{
if (this != &c) {
peer_ = c.peer_;
outstandingUpload_ = c.outstandingUpload_;
lastAmUnchoking_ = c.lastAmUnchoking_;
recentUnchoking_ = c.recentUnchoking_;
uploadSpeed_ = c.uploadSpeed_;
}
return *this;
}
bool BtSeederStateChoke::PeerEntry::operator<(const PeerEntry& rhs) const
{
if (this->outstandingUpload_ && !rhs.outstandingUpload_) {
return true;
}
else if (!this->outstandingUpload_ && rhs.outstandingUpload_) {
return false;
}
if (this->recentUnchoking_ &&
(this->lastAmUnchoking_ > rhs.lastAmUnchoking_)) {
return true;
}
else if (rhs.recentUnchoking_) {
return false;
}
else {
return this->uploadSpeed_ > rhs.uploadSpeed_;
}
}
void BtSeederStateChoke::PeerEntry::disableOptUnchoking()
{
peer_->optUnchoking(false);
}
void BtSeederStateChoke::unchoke(
std::vector<BtSeederStateChoke::PeerEntry>& peers)
{
int count = (round_ == 2) ? 4 : 3;
std::sort(std::begin(peers), std::end(peers));
auto r = std::begin(peers);
for (; r != std::end(peers) && count; ++r, --count) {
auto& peer = (*r).getPeer();
peer->chokingRequired(false);
A2_LOG_INFO(fmt("RU: %s:%u, ulspd=%d", peer->getIPAddress().c_str(),
peer->getPort(), (*r).getUploadSpeed()));
}
if (round_ < 2) {
std::for_each(std::begin(peers), std::end(peers),
std::mem_fn(&PeerEntry::disableOptUnchoking));
if (r != std::end(peers)) {
std::shuffle(r, std::end(peers), *SimpleRandomizer::getInstance());
auto& peer = (*r).getPeer();
peer->optUnchoking(true);
A2_LOG_INFO(
fmt("POU: %s:%u", peer->getIPAddress().c_str(), peer->getPort()));
}
}
}
void BtSeederStateChoke::executeChoke(const PeerSet& peerSet)
{
A2_LOG_INFO(fmt("Seeder state, %d choke round started", round_));
lastRound_ = global::wallclock();
std::vector<PeerEntry> peerEntries;
for (const auto& p : peerSet) {
if (!p->isActive()) {
continue;
}
p->chokingRequired(true);
if (p->peerInterested()) {
peerEntries.push_back(PeerEntry(p));
continue;
}
p->optUnchoking(false);
}
unchoke(peerEntries);
if (++round_ == 3) {
round_ = 0;
}
}
void swap(BtSeederStateChoke::PeerEntry& a, BtSeederStateChoke::PeerEntry& b)
{
a.swap(b);
}
} // namespace aria2