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tcphub.cpp
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182 lines (150 loc) · 5.57 KB
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/*
Copyright 2022 Benjamin Vedder benjamin@vedder.se
Copyright 2022 Joel Svensson svenssonjoel@yahoo.se
This file is part of VESC Tool.
VESC Tool 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.
VESC Tool 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 <http://www.gnu.org/licenses/>.
*/
#include "tcphub.h"
#include "utility.h"
#include <QDateTime>
#include <QEventLoop>
#include <QtDebug>
#include <QHostInfo>
TcpHub::TcpHub(QObject *parent)
: QObject{parent}
{
mTcpHubServer = new QTcpServer(this);
connect(mTcpHubServer, SIGNAL(newConnection()), this, SLOT(newTcpHubConnection()));
}
TcpHub::~TcpHub()
{
QMapIterator<QString, TcpConnectedVesc*> i(mConnectedVescs);
while (i.hasNext()) {
i.next();
delete i.value();
}
}
bool TcpHub::start(int port, QHostAddress addr)
{
return mTcpHubServer->listen(addr, port);
}
bool TcpHub::ping(QString server, int port, QString uuid)
{
QHostAddress host;
host.setAddress(server);
// Try DNS lookup
if (host.isNull()) {
QList<QHostAddress> addresses = QHostInfo::fromName(server).addresses();
if (!addresses.isEmpty()) {
host.setAddress(addresses.first().toString());
}
}
if (host.isNull()) {
return false;
}
QTcpSocket socket;
socket.connectToHost(host, port);
if (!Utility::waitSignal(&socket, SIGNAL(connected()), 1000)) {
return false;
}
socket.write(QString("PING:%1:0\n").arg(uuid).toLocal8Bit());
socket.flush();
auto res = Utility::waitForLine(&socket, 1000);
return res == "PONG";
}
void TcpHub::newTcpHubConnection()
{
QTcpSocket *socket = mTcpHubServer->nextPendingConnection();
socket->setSocketOption(QAbstractSocket::LowDelayOption, true);
socket->setSocketOption(QAbstractSocket::KeepAliveOption, true);
QString connStr = Utility::waitForLine(socket, 5000);
if (connStr.isEmpty()) {
socket->close();
socket->deleteLater();
qWarning() << "Waiting for connect string timed out";
return;
}
auto tokens = connStr.split(":");
if (tokens.size() == 3) {
auto type = tokens.at(0).toUpper().replace(" ", "");
auto uuid = tokens.at(1).toUpper().replace(" ", "");
auto pass = tokens.at(2);
if (uuid.length() < 3) {
qWarning() << "Too short UUID";
socket->close();
socket->deleteLater();
return;
}
if (type == "VESC") {
if (mConnectedVescs.contains(uuid)) {
mConnectedVescs[uuid]->vescSocket->close();
}
TcpConnectedVesc *v = new TcpConnectedVesc;
v->vescSocket = socket;
v->pass = pass;
mConnectedVescs.insert(uuid, v);
connect(v->vescSocket, &QTcpSocket::disconnected, [v, uuid, this]() {
qDebug() << tr("VESC with UUID %1 disconnected").arg(uuid);
mConnectedVescs.remove(uuid);
QTimer::singleShot(0, [v]() {
delete v;
});
});
qDebug() << tr("VESC with UUID %1 connected").arg(uuid);
return;
} else if (type == "VESCTOOL") {
if (mConnectedVescs.contains(uuid)) {
TcpConnectedVesc *v = mConnectedVescs[uuid];
if (v->pass == pass) {
if (v->vescToolSocket != nullptr) {
v->vescToolSocket->close();
v->vescToolSocket->deleteLater();
}
v->vescToolSocket = socket;
connect(v->vescToolSocket, &QTcpSocket::readyRead, [v]() {
if (v->vescSocket != nullptr && v->vescSocket->isOpen()) {
v->vescSocket->write(v->vescToolSocket->readAll());
}
});
connect(v->vescSocket, &QTcpSocket::readyRead, [v]() {
if (v->vescToolSocket != nullptr && v->vescToolSocket->isOpen()) {
v->vescToolSocket->write(v->vescSocket->readAll());
}
});
connect(v->vescToolSocket, &QTcpSocket::disconnected, [uuid]() {
qDebug() << "VESC Tool disconnected from" << uuid;
});
qDebug() << "VESC Tool connected to" << uuid;
return;
} else {
qWarning() << "Invalid password" << pass << v->pass;
}
} else {
qWarning() << tr("No VESC with UUID %1 found").arg(uuid);
}
} else if (type == "PING") {
if (mConnectedVescs.contains(uuid)) {
socket->write("PONG\n");
socket->flush();
} else {
socket->write("NULL\n");
socket->flush();
}
} else {
qWarning() << "Invalid connect string";
}
} else {
qWarning() << "Invalid connect string";
}
socket->close();
socket->deleteLater();
}