qmlfrontend/net_session.cpp
author Wuzzy <Wuzzy2@mail.ru>
Sun, 15 Sep 2019 21:36:09 +0200
changeset 15407 895b02e78564
parent 15078 fb7a9b0119d3
child 15891 d52f5d8e75e6
permissions -rw-r--r--
Remove accidental air mines in official racer challenges
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#include "net_session.h"
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#include <QUuid>
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#include "players_model.h"
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#include "rooms_model.h"
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NetSession::NetSession(QObject *parent)
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    : QObject(parent),
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      m_playersModel(new PlayersListModel()),
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      m_roomsModel(new RoomsListModel()),
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      m_sessionState(NotConnected) {}
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NetSession::~NetSession() { close(); }
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QUrl NetSession::url() const { return m_url; }
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QAbstractSocket::SocketState NetSession::state() const {
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  if (m_socket)
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    return m_socket->state();
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  else
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    return QAbstractSocket::UnconnectedState;
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}
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void NetSession::open() {
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  m_socket.reset(new QTcpSocket());
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  connect(m_socket.data(), &QAbstractSocket::stateChanged, this,
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          &NetSession::stateChanged);
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  connect(m_socket.data(), &QTcpSocket::readyRead, this,
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          &NetSession::onReadyRead);
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  m_socket->connectToHost(m_url.host(),
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                          static_cast<quint16>(m_url.port(46631)));
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}
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QString NetSession::nickname() const { return m_nickname; }
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NetSession::SessionState NetSession::sessionState() const {
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  return m_sessionState;
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}
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QString NetSession::room() const { return m_room; }
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QString NetSession::passwordHash() const { return m_passwordHash; }
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void NetSession::setUrl(const QUrl &url) {
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  if (m_url == url) return;
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  m_url = url;
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  emit urlChanged(m_url);
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}
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void NetSession::setNickname(const QString &nickname) {
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  if (m_nickname == nickname) return;
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  m_nickname = nickname;
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  emit nicknameChanged(m_nickname);
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}
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void NetSession::setPasswordHash(const QString &passwordHash) {
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  if (m_passwordHash == passwordHash) return;
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  m_passwordHash = passwordHash;
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  emit passwordHashChanged(m_passwordHash);
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  if (m_sessionState == Authentication) sendPassword();
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}
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void NetSession::setRoom(const QString &room) {
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  if (m_room == room) return;
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  m_room = room;
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  emit roomChanged(m_room);
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}
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void NetSession::close() {
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  if (!m_socket.isNull()) {
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    m_socket->disconnectFromHost();
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    m_socket.clear();
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    setSessionState(NotConnected);
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    setRoom({});
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  }
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}
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void NetSession::onReadyRead() {
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  while (m_socket->canReadLine()) {
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    auto line = QString::fromUtf8(m_socket->readLine().simplified());
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    if (line.isEmpty()) {
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      parseNetMessage(m_buffer);
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      m_buffer.clear();
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    } else {
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      m_buffer.append(line);
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    }
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  }
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}
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void NetSession::parseNetMessage(const QStringList &message) {
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  if (message.isEmpty()) {
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    qWarning() << "Empty net message received";
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    return;
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  }
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  qDebug() << "[SERVER]" << message;
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  using Handler = std::function<void(NetSession *, const QStringList &)>;
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  static QMap<QString, Handler> commandsMap{
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      {"ADD_TEAM", &NetSession::handleAddTeam},
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      {"ASKPASSWORD", &NetSession::handleAskPassword},
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      {"BANLIST", &NetSession::handleBanList},
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      {"BYE", &NetSession::handleBye},
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      {"CFG", &NetSession::handleCfg},
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      {"CHAT", &NetSession::handleChat},
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      {"CLIENT_FLAGS", &NetSession::handleClientFlags},
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      {"CONNECTED", &NetSession::handleConnected},
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      {"EM", &NetSession::handleEm},
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      {"ERROR", &NetSession::handleError},
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      {"HH_NUM", &NetSession::handleHhNum},
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      {"INFO", &NetSession::handleInfo},
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      {"JOINED", &NetSession::handleJoined},
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      {"JOINING", &NetSession::handleJoining},
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      {"KICKED", &NetSession::handleKicked},
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      {"LEFT", &NetSession::handleLeft},
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      {"LOBBY:JOINED", &NetSession::handleLobbyJoined},
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      {"LOBBY:LEFT", &NetSession::handleLobbyLeft},
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      {"NICK", &NetSession::handleNick},
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      {"NOTICE", &NetSession::handleNotice},
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      {"PING", &NetSession::handlePing},
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      {"PONG", &NetSession::handlePong},
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      {"PROTO", &NetSession::handleProto},
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      {"REDIRECT", &NetSession::handleRedirect},
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      {"REMOVE_TEAM", &NetSession::handleRemoveTeam},
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      {"REPLAY_START", &NetSession::handleReplayStart},
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      {"ROOMABANDONED", &NetSession::handleRoomAbandoned},
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      {"ROOM", &NetSession::handleRoom},
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      {"ROOMS", &NetSession::handleRooms},
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      {"ROUND_FINISHED", &NetSession::handleRoundFinished},
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      {"RUN_GAME", &NetSession::handleRunGame},
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      {"SERVER_AUTH", &NetSession::handleServerAuth},
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      {"SERVER_MESSAGE", &NetSession::handleServerMessage},
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      {"SERVER_VARS", &NetSession::handleServerVars},
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      {"TEAM_ACCEPTED", &NetSession::handleTeamAccepted},
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      {"TEAM_COLOR", &NetSession::handleTeamColor},
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      {"WARNING", &NetSession::handleWarning},
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  };
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  auto handler =
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      commandsMap.value(message[0], &NetSession::handleUnknownCommand);
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  handler(this, message.mid(1));
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}
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void NetSession::handleConnected(const QStringList &parameters) {
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  if (parameters.length() < 2 || parameters[1].toInt() < cMinServerVersion) {
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    send("QUIT", "Server too old");
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    emit error(tr("Server too old"));
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    close();
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  } else {
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    setSessionState(Login);
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    send("NICK", m_nickname);
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    send("PROTO", QString::number(cProtocolVersion));
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  }
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}
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void NetSession::handlePing(const QStringList &parameters) {
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  send("PONG", parameters);
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}
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void NetSession::handleBye(const QStringList &parameters) { close(); }
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void NetSession::handleUnknownCommand(const QStringList &parameters) {
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  Q_UNUSED(parameters);
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  qWarning() << "Command is not recognized";
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}
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void NetSession::handleAddTeam(const QStringList &parameters) {}
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void NetSession::handleAskPassword(const QStringList &parameters) {
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  if (parameters.length() != 1 || parameters[0].length() < 16) {
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    qWarning("Bad ASKPASSWORD message");
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    return;
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  }
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  setSessionState(Authentication);
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  m_serverSalt = parameters[0];
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  m_clientSalt = QUuid::createUuid().toString();
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  if (m_passwordHash.isEmpty()) {
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    emit passwordAsked();
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  } else {
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    sendPassword();
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  }
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}
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void NetSession::handleBanList(const QStringList &parameters) {}
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void NetSession::handleCfg(const QStringList &parameters) {}
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void NetSession::handleChat(const QStringList &parameters) {}
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void NetSession::handleClientFlags(const QStringList &parameters) {}
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void NetSession::handleEm(const QStringList &parameters) {}
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void NetSession::handleError(const QStringList &parameters) {}
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void NetSession::handleHhNum(const QStringList &parameters) {}
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void NetSession::handleInfo(const QStringList &parameters) {}
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void NetSession::handleJoined(const QStringList &parameters) {}
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void NetSession::handleJoining(const QStringList &parameters) {}
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void NetSession::handleKicked(const QStringList &parameters) {}
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void NetSession::handleLeft(const QStringList &parameters) {}
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void NetSession::handleLobbyJoined(const QStringList &parameters) {
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  for (auto player : parameters) {
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    if (player == m_nickname) {
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      // check if server is authenticated or no authentication was performed at
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      // all
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      if (!m_serverAuthHash.isEmpty()) {
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        emit error(tr("Server authentication error"));
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        close();
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      }
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      setSessionState(Lobby);
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    }
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    m_playersModel->addPlayer(player, false);
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  }
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}
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void NetSession::handleLobbyLeft(const QStringList &parameters) {
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  if (parameters.length() == 1) {
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    m_playersModel->removePlayer(parameters[0]);
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  } else if (parameters.length() == 2) {
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    m_playersModel->removePlayer(parameters[0], parameters[1]);
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  } else {
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    qWarning("Malformed LOBBY:LEFT message");
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  }
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}
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void NetSession::handleNick(const QStringList &parameters) {
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  if (parameters.length()) setNickname(parameters[0]);
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}
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void NetSession::handleNotice(const QStringList &parameters) {}
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void NetSession::handlePong(const QStringList &parameters) {
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  Q_UNUSED(parameters)
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}
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void NetSession::handleProto(const QStringList &parameters) {}
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void NetSession::handleRedirect(const QStringList &parameters) {}
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void NetSession::handleRemoveTeam(const QStringList &parameters) {}
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void NetSession::handleReplayStart(const QStringList &parameters) {}
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void NetSession::handleRoomAbandoned(const QStringList &parameters) {}
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void NetSession::handleRoom(const QStringList &parameters) {
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  if (parameters.size() == 10 && parameters[0] == "ADD") {
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    m_roomsModel->addRoom(parameters.mid(1));
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  } else if (parameters.length() == 11 && parameters[0] == "UPD") {
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    m_roomsModel->updateRoom(parameters[1], parameters.mid(2));
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    // keep track of room name so correct name is displayed
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    if (m_room == parameters[1]) {
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      setRoom(parameters[2]);
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    }
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  } else if (parameters.size() == 2 && parameters[0] == "DEL") {
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    m_roomsModel->removeRoom(parameters[1]);
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  }
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}
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void NetSession::handleRooms(const QStringList &parameters) {
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  if (parameters.size() % 9) {
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    qWarning("Net: Malformed ROOMS message");
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    return;
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  }
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  m_roomsModel->setRoomsList(parameters);
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}
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void NetSession::handleRoundFinished(const QStringList &parameters) {}
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void NetSession::handleRunGame(const QStringList &parameters) {}
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void NetSession::handleServerAuth(const QStringList &parameters) {}
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void NetSession::handleServerMessage(const QStringList &parameters) {}
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void NetSession::handleServerVars(const QStringList &parameters) {}
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void NetSession::handleTeamAccepted(const QStringList &parameters) {}
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void NetSession::handleTeamColor(const QStringList &parameters) {}
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void NetSession::handleWarning(const QStringList &parameters) {}
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void NetSession::send(const QString &message) { send(QStringList(message)); }
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void NetSession::send(const QString &message, const QString &param) {
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  send(QStringList{message, param});
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}
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void NetSession::send(const QString &message, const QStringList &parameters) {
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  send(QStringList(message) + parameters);
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}
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void NetSession::send(const QStringList &message) {
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  Q_ASSERT(!m_socket.isNull());
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  qDebug() << "[CLIENT]" << message;
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  m_socket->write(message.join('\n').toUtf8() + "\n\n");
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}
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void NetSession::sendPassword() {
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  /* When we got password hash, and server asked us for a password, perform
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   * mutual authentication: at this point we have salt chosen by server. Client
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   * sends client salt and hash of secret (password hash) salted with client
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   * salt, server salt, and static salt (predefined string + protocol number).
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   * Server should respond with hash of the same set in different order.
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   */
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  if (m_passwordHash.isEmpty() || m_serverSalt.isEmpty()) return;
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  QString hash =
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      QCryptographicHash::hash(m_clientSalt.toLatin1()
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                                   .append(m_serverSalt.toLatin1())
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                                   .append(m_passwordHash)
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                                   .append(QByteArray::number(cProtocolVersion))
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                                   .append("!hedgewars"),
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                               QCryptographicHash::Sha1)
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          .toHex();
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  m_serverHash =
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      QCryptographicHash::hash(m_serverSalt.toLatin1()
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                                   .append(m_clientSalt.toLatin1())
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                                   .append(m_passwordHash)
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                                   .append(QByteArray::number(cProtocolVersion))
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                                   .append("!hedgewars"),
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                               QCryptographicHash::Sha1)
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          .toHex();
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  send("PASSWORD", QStringList{hash, m_clientSalt});
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}
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14915
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void NetSession::setSessionState(NetSession::SessionState sessionState) {
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  if (m_sessionState == sessionState) return;
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  m_sessionState = sessionState;
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  emit sessionStateChanged(sessionState);
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}