TomZ
122 lines
4.1 KiB
C++
122 lines
4.1 KiB
C++
/*
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* This file is part of the Flowee project
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* Copyright (C) 2020 Tom Zander <tomz@freedommail.ch>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "FillAddressDBAction.h"
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#include "DownloadManager.h"
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#include "ConnectionManager.h"
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#include "PeerAddressDB.h"
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#include "Peer.h"
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#include <time.h>
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#include <functional>
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static std::vector<std::string> fillSeeders()
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{
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std::vector<std::string> answer;
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answer.push_back("seed.flowee.cash");
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answer.push_back("seed.bitcoinabc.org");
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answer.push_back("seed.bchd.cash");
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return answer;
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}
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FillAddressDBAction::FillAddressDBAction(DownloadManager *parent)
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: Action(parent),
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m_resolver(parent->service()),
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m_seeders(fillSeeders())
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{
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assert(!m_seeders.empty());
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}
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void FillAddressDBAction::execute(const boost::system::error_code &error)
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{
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if (error)
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return;
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if (m_dlm->connectionManager().peerAddressDb().peerCount() < 10) {
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if ((m_dnsLookupState % 2) != 0) { // skip if request in progress
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// start a new one, odd numbers means we initiate a lookup, even if they finished
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const auto state = ++m_dnsLookupState;
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const auto index = state / 2;
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if (index > int(m_seeders.size())) {
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logCritical() << "Asked all seed DNS's without result";
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m_dnsLookupState = -1;
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}
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else {
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logDebug() << "Start to resolve DNS entry" << m_seeders.at(index);
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boost::asio::ip::tcp::resolver::query query(m_seeders.at(index), "8333");
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m_resolver.async_resolve(query, std::bind(&FillAddressDBAction::onAddressResolveComplete,
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this, std::placeholders::_1, std::placeholders::_2));
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}
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}
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again();
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return;
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}
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if (m_dlm->connectionManager().peerAddressDb().peerCount() > 2000) {
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logDebug() << "FillAddressDb done";
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m_dlm->done(this);
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return;
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}
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for (auto peer : m_dlm->connectionManager().connectedPeers()) {
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auto address = peer->peerAddress();
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if (address.isValid()) {
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if (!address.askedAddresses()) {
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address.setAskedAddresses(true);
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logInfo() << "Sending GetAddr msg to" << address.peerAddress();
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peer->sendMessage(Message(Api::LegacyP2P, Api::P2P::GetAddr));
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m_lastRequestStarted = time(nullptr);
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again();
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return;
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}
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}
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}
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if (m_lastRequestStarted > 0 && static_cast<int64_t>(time(nullptr)) - m_lastRequestStarted < 10) {
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again();
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return;
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}
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// lets connect to some new peers then.
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auto address = m_dlm->connectionManager().peerAddressDb().findBest();
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if (address.isValid()) {
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logInfo() << "AddressDB still needs more data: creating a new connection";
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m_dlm->connectionManager().connect(address);
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}
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again();
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}
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void FillAddressDBAction::onAddressResolveComplete(const boost::system::error_code &error, boost::asio::ip::tcp::resolver::iterator iterator)
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{
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if (error.value() == boost::asio::error::operation_aborted)
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// this means the app is shutting down.
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return;
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if (!error) {
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boost::asio::ip::tcp::resolver::iterator it_end;
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while (iterator != it_end) {
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EndPoint ep(iterator->endpoint().address(), 8333);
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m_dlm->connectionManager().peerAddressDb().addOne(ep);
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iterator++;
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}
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}
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m_dnsLookupState++;
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}
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