File indexing completed on 2023-09-24 04:08:44

 /*
     This file is part of the KDE project
     SPDX-FileCopyrightText: 2000 Alex Zepeda <zipzippy@sonic.net>
     SPDX-FileCopyrightText: 2001 George Staikos <staikos@kde.org>
     SPDX-FileCopyrightText: 2001 Dawit Alemayehu <adawit@kde.org>
     SPDX-FileCopyrightText: 2007, 2008 Andreas Hartmetz <ahartmetz@gmail.com>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #ifndef _TCP_SLAVEBASE_H
 #define _TCP_SLAVEBASE_H
 
 #include <stdio.h>
 #include <sys/types.h>
 
 #include "kiocore_export.h"
 #include <kio/slavebase.h>
 
 #include <memory>
 
 class QIODevice;
 class QSslSocket;
 
 #if KIOCORE_ENABLE_DEPRECATED_SINCE(5, 101)
 
 namespace KIO
 {
 
 /**
  * @class KIO::TCPSlaveBase tcpslavebase.h <KIO/TCPSlaveBase>
  *
  * A SlaveBase with convenience methods for TCP-connected storages.
  *
  * @deprecated Since 5.99, use TCPWorkerBase.
  */
 class KIOCORE_EXPORT TCPSlaveBase : public SlaveBase
 {
 public:
     /**
      * Constructor.
      *
      * @param autoSsl if true, will automatically invoke startSsl() right after
      *                connecting. In the absence of errors the use of SSL will
      *                therefore be transparent to higher layers.
      */
     KIOCORE_DEPRECATED_VERSION_BELATED(5, 101, 5, 99, "Use TCPWorkerBase")
     TCPSlaveBase(const QByteArray &protocol, const QByteArray &poolSocket, const QByteArray &appSocket, bool autoSsl = false);
 
     ~TCPSlaveBase() override;
 
 protected:
     enum SslResultDetail {
         ResultOk = 1,
         ResultOverridden = 2,
         ResultFailed = 4,
         ResultFailedEarly = 8,
     };
     friend class QFlags<KIO::TCPSlaveBase::SslResultDetail>;
 
 public:
     Q_DECLARE_FLAGS(SslResult, SslResultDetail)
 protected:
     /**
      * Send data to the remote host.
      *
      * @param data data to be sent to remote machine
      * @param len the length (in bytes) of the data to be sent
      *
      * @return the actual size of the data that was sent
      */
     using SlaveBase::write; // Silence incompatible virtual override warning
     ssize_t write(const char *data, ssize_t len);
 
     /**
      * Read incoming data from the remote host.
      *
      * @param data storage for the data read from server
      * @param len length of the data (in bytes) to read from the server
      *
      * @return the actual size of data that was obtained
      */
     using SlaveBase::read;
     ssize_t read(char *data, ssize_t len);
 
     /**
      * Same as read() except it reads data one line at a time.
      */
     ssize_t readLine(char *data, ssize_t len);
 
     /**
      * Performs the initial TCP connection stuff and/or
      * SSL handshaking as necessary.
      *
      * @param protocol the protocol being used
      * @param host hostname
      * @param port port number
      *
      * @return on success, true is returned.
      *         on failure, false is returned and an appropriate
      *         error message is sent to the application.
      */
     bool connectToHost(const QString &protocol, const QString &host, quint16 port);
 
     /**
      * Connects to the specified host and port.
      *
      * @param host host name
      * @param port port number
      * @param errorString if not nullptr, this string will contain error information
      *                    on why the connection request failed.
      *
      * @return  on success, 0 is returned. on failure, a KIO::Error code is returned.
      *          @ref errorString, if not nullptr, will contain the appropriate error message
      *          that can be sent back to the client.
      *
      * @since 4.7.2
      */
     int connectToHost(const QString &host, quint16 port, QString *errorString = nullptr);
 
     /**
      * the current port for this service
      *
      */
     quint16 port() const;
 
     /**
      * Will start SSL after connecting?
      *
      * @return if so, true is returned.
      *         if not, false is returned.
      */
     bool isAutoSsl() const;
 
     /**
      * Is the current connection using SSL?
      *
      * @return if so, true is returned.
      *         if not, false is returned.
      */
     bool isUsingSsl() const;
 
     /**
      * Start using SSL on the connection. You can use it right after connecting
      * for classic, transparent to the protocol SSL. Calling it later can be
      * used to implement e.g. SMTP's STARTTLS feature.
      *
      * @return on success, true is returned.
      *         on failure, false is returned.
      */
     bool startSsl();
 
     /**
      * Close the connection and forget non-permanent data like the peer host.
      */
     void disconnectFromHost();
 
     /**
      * Returns true when end of data is reached.
      */
     bool atEnd() const;
 
     /**
      * Determines whether or not we are still connected
      * to the remote machine.
      *
      * return @p true if the socket is still active or
      *           false otherwise.
      */
     bool isConnected() const;
 
     /**
      * Wait for incoming data on the socket
      * for the period specified by @p t.
      *
      * @param t  length of time in seconds that we should monitor the
      *           socket before timing out.
      *
      * @return true if any data arrived on the socket before the
      *              timeout value was reached, false otherwise.
      */
     bool waitForResponse(int t);
 
     /**
      * Sets the mode of the connection to blocking or non-blocking.
      *
      * Be sure to call this function before calling connectToHost.
      * Otherwise, this setting will not have any effect until the next
      * @p connectToHost.
      *
      * @param b true to make the connection a blocking one, false otherwise.
      */
     void setBlocking(bool b);
 
 #if KIOCORE_ENABLE_DEPRECATED_SINCE(5, 83)
     /**
      * Return the socket object, if the class ever needs to do anything to it.
      *
      * @deprecated since 5.83, use @c tcpSocket() instead.
      */
     KIOCORE_DEPRECATED_VERSION(5, 83, "Use tcpSocket() instead.")
     QIODevice *socket() const;
 #endif
 
     /**
      * Returns the socket object, useful if sub-classes need to do anything
      * with it (e.g. connect to any of the signals emitted by @c QAbstractSocket).
      *
      * @since 5.83
      */
     QAbstractSocket *tcpSocket() const;
 
 protected:
     void virtual_hook(int id, void *data) override;
 
 private:
     // For the certificate verification code
     SslResult verifyServerCertificate();
 
     class TcpSlaveBasePrivate;
     std::unique_ptr<TcpSlaveBasePrivate> const d;
 };
 
 }
 
 #endif
 
 #endif