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/* SPDX-FileCopyrightText: 2026 Project Tick
* SPDX-FileContributor: Project Tick
* SPDX-License-Identifier: GPL-3.0-or-later
*
* MeshMC - A Custom Launcher for Minecraft
* Copyright (C) 2026 Project Tick
*
* 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 3 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, see <https://www.gnu.org/licenses/>.
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Copyright 2013-2021 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "LookupServerAddress.h"
#include <launch/LaunchTask.h>
LookupServerAddress::LookupServerAddress(LaunchTask* parent)
: LaunchStep(parent), m_dnsLookup(new QDnsLookup(this))
{
connect(m_dnsLookup, &QDnsLookup::finished, this,
&LookupServerAddress::on_dnsLookupFinished);
m_dnsLookup->setType(QDnsLookup::SRV);
}
void LookupServerAddress::setLookupAddress(const QString& lookupAddress)
{
m_lookupAddress = lookupAddress;
m_dnsLookup->setName(QString("_minecraft._tcp.%1").arg(lookupAddress));
}
void LookupServerAddress::setOutputAddressPtr(MinecraftServerTargetPtr output)
{
m_output = std::move(output);
}
bool LookupServerAddress::abort()
{
m_dnsLookup->abort();
emitFailed("Aborted");
return true;
}
void LookupServerAddress::executeTask()
{
m_dnsLookup->lookup();
}
void LookupServerAddress::on_dnsLookupFinished()
{
if (isFinished()) {
// Aborted
return;
}
if (m_dnsLookup->error() != QDnsLookup::NoError) {
emit logLine(QString("Failed to resolve server address (this is NOT an "
"error!) %1: %2\n")
.arg(m_dnsLookup->name(), m_dnsLookup->errorString()),
MessageLevel::MeshMC);
resolve(m_lookupAddress,
25565); // Technically the task failed, however, we don't abort
// the launch and leave it up to minecraft to fail (or
// maybe not) when connecting
return;
}
const auto records = m_dnsLookup->serviceRecords();
if (records.empty()) {
emit logLine(
QString("Failed to resolve server address %1: the DNS lookup "
"succeeded, but no records were returned.\n")
.arg(m_dnsLookup->name()),
MessageLevel::Warning);
resolve(m_lookupAddress,
25565); // Technically the task failed, however, we don't abort
// the launch and leave it up to minecraft to fail (or
// maybe not) when connecting
return;
}
const auto& firstRecord = records.at(0);
quint16 port = firstRecord.port();
emit logLine(QString("Resolved server address %1 to %2 with port %3\n")
.arg(m_dnsLookup->name(), firstRecord.target(),
QString::number(port)),
MessageLevel::MeshMC);
resolve(firstRecord.target(), port);
}
void LookupServerAddress::resolve(const QString& address, quint16 port)
{
m_output->address = address;
m_output->port = port;
emitSucceeded();
m_dnsLookup->deleteLater();
}
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